EP2163356B1 - Hand-held power tool with a covering cap and a dust removal connection - Google Patents

Hand-held power tool with a covering cap and a dust removal connection Download PDF

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Publication number
EP2163356B1
EP2163356B1 EP09008423A EP09008423A EP2163356B1 EP 2163356 B1 EP2163356 B1 EP 2163356B1 EP 09008423 A EP09008423 A EP 09008423A EP 09008423 A EP09008423 A EP 09008423A EP 2163356 B1 EP2163356 B1 EP 2163356B1
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EP
European Patent Office
Prior art keywords
tool
hand
dust removal
covering
operated power
Prior art date
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Active
Application number
EP09008423A
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German (de)
French (fr)
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EP2163356A2 (en
EP2163356A3 (en
Inventor
Jiri Blazek
Jiri Novotny
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Protool GmbH
Original Assignee
Protool GmbH
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Publication date
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Priority to PL09008423T priority Critical patent/PL2163356T3/en
Publication of EP2163356A2 publication Critical patent/EP2163356A2/en
Publication of EP2163356A3 publication Critical patent/EP2163356A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools

Definitions

  • the invention relates to a hand-held machine tool with a rotatably drivable by a drive motor tool holder for a machining side for abrasive and / or cutting Werkêtbearbeitung exhibiting tool with a tool space for receiving the tool having cover for at least partially covering the tool according to the preamble of the claim 1.
  • the idea according to the invention is that the flow cross-section is smaller at a greater distance from the inlet opening of the dust discharge connection. As a result, an optimum suction effect is also achieved there, if advantageously e.g. a vacuum cleaner is connected to the dust discharge port.
  • the dust removal, in particular a suction so it is optimal even in areas of the tool room, which are far away from the inlet opening.
  • the flow cross section may increase, for example, in stages. However, it is advantageous if the flow cross-section increases substantially continuously. It is possible that the flow cross-section increases linearly. But it is also possible that the flow cross section in the direction of the inlet opening is not linear, for example exponentially, to.
  • the tool has on its side facing the dust removal channel wings or other air entrainment means for generating or accelerating the air flow. As a result, the tool can still contribute to a greater extent to the flow in the dust discharge channel.
  • the top wall is advantageously substantially flat. This creates a good flow behavior. It is understood that the respective walls can also have, for example, air guide ribs, channels or the like.
  • the dust removal channel is expediently spirally, i. he has a spiral shape.
  • the dust removal channel extends around a work spindle on which the tool is arranged.
  • the tool room can also have a plurality of inlet openings leading to a dust discharge connection, to each of which a dust removal channel is assigned, of which at least one has a cross section increasing toward the inlet opening.
  • this has at least one next to the tool, for example, a side edge of the tool, arranged inflow opening.
  • the tool has, for example, a distance to a side wall of the cover. It is understood that a plurality of inflow openings can be provided.
  • the tool room is expediently bounded laterally by a side wall of the cover. It is also possible that a separate from the cover side edge cover is provided for lateral delimitation of the tool room.
  • the side edge cover is expediently in front of the side wall in the direction of the work object.
  • the cover and / or the wall segment are expediently tilt-stable in the covering position.
  • the operator does not have to hold the cover or wall segment in the respective position.
  • locking means, weight or the like for a respective determination of the cover or wall segment in the open position or the covering position are possible.
  • a spring arrangement for holding the cover element or the wall segment in the open position or the covering position is advantageous. The operator tilts the cover or the wall segment over a tilt point or dead center. The spring assembly brings and holds the cover or wall segment then in the subsequent open position or covering position.
  • the side edge cover and / or the cover is movably mounted for engagement with the work object with respect to the cover.
  • the cover is expediently firmly connected to the hand-held machine tool, while the comparatively light Seiterirandabdeckung or even the light cover element are movable with respect to the cover.
  • This makes it possible for the side edge cover and / or the cover element to slide optimally along a contour of the work object.
  • the adjustment forces are low due to the lightweight side edge cover.
  • a contact spring arrangement for loading the side edge cover as a whole and / or only of the cover element in the direction of the work object.
  • the abutment spring arrangement "presses" the side edge cover or the cover element in the direction of the work object, so that they rest advantageously on this.
  • the flexible seal may for example comprise a sealing bead and / or a sealing bellows, e.g. plastic, rubber or the like flexible material.
  • the flexible seal comprises a brush.
  • the side edge cover it is basically possible for the side edge cover to include both a brush and a sealing bead, e.g. has at different peripheral portions and / or parallel next to each other.
  • the flexible seal is expediently permeable to air.
  • air inlet openings for example, air inlet openings, a gap below the seal or the like are provided.
  • Air permeability is automatically present in the brush, so to speak. If a sealing bead is provided, it can have, for example, air passage openings or the like. The air permeability allows an inflow of air into the so-called tool room, which is advantageous for effective dust removal, in particular dust extraction.
  • the tool is expediently a grinding tool, for example a grinding pad, which is expediently provided with an abrasive, eg a grinding wheel.
  • the tool can also be a grinding wheel.
  • the invention is in hand machine tools for fine grinding as applicable, as in concrete grinding machines or other grinding machines, which have a strong abrasive effect.
  • the grinding pad or the grinding wheel expediently have passage openings for the passage of air into the dust removal channel.
  • the invention can also be used in manual machine tools for separating work object processing, for example in saws, cut-off grinders or the like.
  • a hand-held power tool 10 shown in the drawing is, for example, a hand-held grinding machine 11.
  • a tool spindle 15, at the front free end of a tool holder 16 is arranged.
  • the hand-held power tool 10 can be connected by means of a connecting cable 17 to a power supply network. It is understood that alternatively or additionally also an operation by means of an accumulator memory or the like is possible.
  • An operator may, for example, grasp the hand machine tool 10 at a handle portion 18 remote from the tool holder 16, where a switch 23 is arranged to turn the drive motor 13 on and off, and optionally also at a conveniently bow-type handle 19 closer to the tool holder 16, for example, above the same, is arranged.
  • the handle 19 is in the cross-sectional view according to FIG. 2a omitted.
  • the handle 19 is suitably pivotable and fixable by means of a locking screw 20, so that the operator can adjust the hand-held machine tool 10 optimally to his ergonomic needs.
  • the operator can grasp the hand-held power tool 10 with both hands and thus lead safely.
  • the operation of the tool 21 creates a large amount of dust, which can harm the operator's health.
  • a hood body 29 is connected to the housing 12 substantially rigidly, for example by means of screws 30. At the top of the hood body 29 reinforcing ribs are expediently mounted, which improves its mechanical stability.
  • the housing 12 and the hood body 29 as the main component of the cover 25 expediently form a rigid structural unit. It should be noted that, of course, a flexible mounting of the cover with respect to the housing 12 is possible or an arrangement may be made, in which the hood body forms a part of the housing of a hand-held machine tool. In any case, the position of the tool 21 with respect to the tool space 26 by the rigid connection of the hood body 29 with the housing 12 is clearly defined. Nevertheless, the cover 24 has a mobility for flexible adaptation to a respective substrate to be processed.
  • the side edge cover 27 is movably supported with respect to the cover hood 25, in particular with respect to the hood body 29.
  • a base part 31 of the side edge cover 27 is movably supported by a guide 32 on the hood body 29.
  • the guide 32 comprises a guide groove 33 at one Radial projection 34 of a Abdeckoberteils 35 of the cover 25.
  • the Abdeckoberteil 35 includes a cover wall 36 of the tool space 26, which faces the tool top 37 of the tool 21.
  • the radial projection 34 forms, as it were, a radial continuation of the cover wall 36 and is integral therewith.
  • a peripheral wall 38 of the cover 25 surrounds the side edge 28 of the tool 21.
  • the peripheral wall 38 projects downwardly in the direction of the tool 21 in front of the cover top 35.
  • the peripheral wall 38 forms an integral part of the Abdeckoberteils 35.
  • the peripheral wall 38 forms a mechanical side protection, within which the tool 21 is arranged.
  • Screws 39 which are screwed into the screw receptacles 40 of the hood body 29, hold the side edge cover 27 on the covering hood 25.
  • the screw receptacles 40 are arranged, for example, between wall sections of the peripheral wall 38 or beside the peripheral wall 38.
  • three screw receptacles 40 are provided at the same distance from each other.
  • the screw receptacles 40 have such a distance from the side edge cover 27 that heads of the screws 39 which are screwed into the screw receptacles 40, the side edge cover 27 overhang and thus hold them on the hood body 29. Between the screw heads and the side edge cover 27 a movement play is provided.
  • An abutment spring arrangement 41 with springs 42 loads the side edge cover 27 as a whole in the direction of the work object 22.
  • the springs 42 are provided for example between the Abdeckoberteil 35, in particular its radial projection 34, and the base part 31 of the side edge cover 27.
  • four springs 42 are provided, the distance of which is expediently substantially the same.
  • the two front springs 42 are visible.
  • springs 42 are expediently also provided on the side of the side edge cover facing away from the viewer.
  • the radial projection 34 protrudes as a kind of wreath in front of the top wall 36 and the top cover 35, respectively.
  • the radial projection 34 is substantially annular and extends over the entire outer periphery of the cover 25 except for a front portion.
  • the side edge cover 27 has a cover 43, which by means of a pivot bearing 44 with respect to the other components of the cover 24 between a covering position A, in which it covers the side edge 28 of the tool 21 and an open position O pivotally mounted, in which the cover 43 has a side edge portion 45 of the tool 21 releases.
  • the peripheral wall 38 has in the region of the cover 43 a cutout, through which the tool 21 protrudes forward from the tool room 26.
  • O cover 43 When folded up, located in the open position O cover 43 is an optimal edge processing of the work object 22 or other surface to be machined possible.
  • a cutout 47 is provided, through which the tool 21 can protrude.
  • the pivot bearing 44 is provided between the base part 31 and the cover 43.
  • the cover 43 is pivoted to a base member 31 and makes its movements with.
  • the side edge cover 27 moves as a whole with respect to the hood body 29 fixedly mounted on the housing 12, which allows an optimal adaptation to a work object contour.
  • the side edge cover 27 has a flexible seal 48.
  • the flexible seal 48 is at least partially formed by a rubber bead or the like.
  • a brush 49 is provided, which not only optimally adapts to a substrate, but also still permeable to air, which is advantageous for effective dust removal, in particular dust extraction.
  • the brush 49 forms a kind of brush ring, which surrounds the tool space 26 annular.
  • the abutment spring assembly 41 pushes the side edge cover 27 away from the cover 25 so that the seal 48 protrudes in front of the peripheral wall 38 ( Fig. 3b . 4 ).
  • the side edge cover 27 including the Bürstkranzes with the brush 49 has a low weight, so that it is easily movable with respect to the other components of the hand-held machine tool 10, in particular of the housing 12 and an optimal adaptation to a substrate to be machined succeeds. For example, if a floor is to be machined, the hand machine tool for example, the in FIG.
  • a cover element in the manner of the cover 43 is pivotally mounted on a stationary component of a hand-held machine tool.
  • the cover is movable relative to the fixed part, in particular floating, about in the manner of the side edge cover 27th
  • the covering element 43 is tilt-stable in the open position O or the covering position A.
  • the covering element 43 tilts over a dead center position (FIG. FIG. 2a ) either in the covering position A ( FIG. 2b ) or in the open position O ( Figure 2c ).
  • the operator of the hand-held machine tool 10 therefore does not have to hold the cover element 43 in the open position O or cover position A.
  • the cover 43 takes the respective position automatically.
  • a latch, a magnet holder or the like could be provided for holding the cover 43 in the respective position.
  • a spring assembly 52 with a spring 53 holds the cover 43 in the covering position A or the open position O.
  • the spring 42 is on the one hand on the base part 31 with a spring holder 54 and on the other hand on the cover 43 hinged by means of a spring holder 55.
  • the spring holder 55 is approximately in the region of a pivot axis of the Swivel bearings 44 provided.
  • the spring 53 is arranged, for example, between two pivot bearing parts of the pivot bearing 44.
  • the spring holder 55 pivots, so to speak, around the spring holder 54 between the covering position A and the open position O via the dead center position FIG. 2a time.
  • the cover 43 is held securely in the open position O or covering position A.
  • the operation is very easy.
  • a recess 56 is provided on the cover 43 for the spring 53.
  • a dust removal channel 62 is formed between the tool 21 and a wall of the tool room 26, which leads to an inlet opening 63 of the dust removal terminal 60.
  • a flow area of the dust discharge passage 62 increases from its start 64 to the inlet port 63.
  • the dust removal channel 62 is provided between the tool upper side 37 of the tool 21 and the cover wall 36 of the tool space 26 facing it.
  • the cover wall 36 is expediently flat, which allows optimum flow behavior.
  • the dust removal channel 62 is limited by the side wall / peripheral wall 38. However, there is a gap between the peripheral wall 38 and the side edge 28 of the tool 21 through which air can flow into the dust discharge channel 62. This inflowing air flows through the air-permeable seal 48, in this case the brush 49, through and past the lower end side of the side wall / peripheral wall 38 into the dust discharge channel 62.
  • the air passage openings 66 are provided on the tool 21, through which air can flow into the dust discharge channel 62.
  • the air passage openings 66 extend from the machining side 51 of the tool 21 to the upper side 37 thereof.
  • a rotational direction of the tool 21 corresponds to a flow direction of the dusty air flow 65, which increases its flow.
  • the dust air flow 65 is shown as an arrow indicating the flow direction of the dust air flow 65.
  • the cover wall 36 may advantageously be a plate component, for example of plastic, which is screwed to the inside to form an upper wall of the tool space 26 to the hood body.
  • the cover wall 36 may also form an integral part of the hood body 29.
  • the seal 48 or brush 49 is permeable to air. This makes it possible that supply air 67 through the bristles of the brush 49 can flow and past the front, free side of the peripheral wall 38 in the dust discharge channel 62, said supply air flows into the annular gap between the peripheral wall 38 and the side edge of the tool 21 and through the air passage openings 66 on the tool 21.
  • the peripheral wall 38 is advantageous in this innovative concept insofar as it laterally delimits the dust removal channel 62 and thus enables optimum flow in the direction of the inlet opening 63.
  • the supply air 67 can still flow freely, so that no flow-preventing negative pressure is created.

Abstract

The hand machine tool (10) has a tool holder rotary operated by a driving motor (13) for a machining side for abrasive or cutting work object machining with a tool and a cover plate (25) with a tool area for supporting the tool for partial covering of the tool. A dust removal channel is guided to an inlet of a dust removal connection. The dust removal channel is formed between the tool and a wall of the tool area.

Description

Die Erfindung betrifft eine Hand-Werkzeugmaschine mit einer durch einen Antriebsmotor rotatorisch antreibbaren Werkzeugaufnahme für ein eine Bearbeitungsseite zur abrasiven und/oder schneidenden Werkobjektbearbeitung aufweisendes Werkzeug, mit einer einen Werkzeugraum zur Aufnahme des Werkzeugs aufweisenden Abdeckhaube zum zumindest teilweise Überdecken des Werkzeugs gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a hand-held machine tool with a rotatably drivable by a drive motor tool holder for a machining side for abrasive and / or cutting Werkobjektbearbeitung exhibiting tool with a tool space for receiving the tool having cover for at least partially covering the tool according to the preamble of the claim 1.

Eine derartige Abdeckhaube für eine Hand-Werkzeugmaschine ist aus US 3585980 A oder aus DE 42 30 642 A1 bekannt.Such cover for a hand-held machine tool is off US 3585980 A or off DE 42 30 642 A1 known.

Eine weitere Abdeckhaube für eine Hand-Schleif- und Poliermaschine ist beispielsweise aus WO 97/32692 A1 bekannt. Durch den Staubabfuhranschluss kann Staub aus einem Werkzeugraum, in dem das beispielsweise als eine Werkzeugscheibe ausgestaltete Werkzeug aufgenommen ist, abgesaugt werden. Die Abdeckhaube ist bezüglich eines Ansatzstutzens für die eigentliche, in der WO 97/32692 A1 nicht im Einzelnen dargestellten Hand-Werkzeugmaschine verbindbar, während die Abdeckhaube bezüglich des Ansatzstutzens schwenkbeweglich ist.Another cover for a hand-sanding and polishing machine is for example off WO 97/32692 A1 known. Dust can be sucked out of a tool room through which the dust discharge connection is located, in which the tool configured as a tool disk, for example, is received. The cover is with respect to a neck for the actual, in the WO 97/32692 A1 Not shown in detail hand-machine tool connected, while the cover is pivotally with respect to the neck.

In der Praxis hat sich herausgestellt, dass das Strömungsverhalten des Absaugstroms in Richtung einer Einlassöffnung des Staubabfuhranschlusses nicht in jedem Betriebsfall optimal ist.In practice, it has been found that the flow behavior of the suction flow in the direction of an inlet opening of the dust discharge port is not optimal in every operating case.

Es ist daher die Aufgabe der vorliegenden Erfindung, eine verbesserte Staubluftführung bereit zu stellen.It is therefore the object of the present invention to provide an improved dust air guide.

Zur Lösung der Aufgabe ist eine Hand-Werkzeugmaschine gemäß der technischen Lehre des Anspruchs 1 vorgesehen.To solve the problem, a hand-held machine tool according to the technical teaching of claim 1 is provided.

Der Staubabfuhrkanal ist zwischen einer Werkzeug-Oberseite des Werkzeugs und einer der Werkzeug-Oberseite zugewandten Deck-Wand des Werkzeugraums vorgesehen.The dust removal channel is provided between a tool top of the tool and a tool top facing the top wall of the tool room.

Der erfindungsgemäße Gedanke ist es, dass der Strömungsquerschnitt bei einem größeren Abstand von der Einlassöffnung des Staubabfuhranschlusses kleiner ist. Dadurch wird auch dort ein optimaler Saugeffekt erzielt, wenn vorteilhaft z.B. ein Staubsauger an den Staubabfuhranschluss angeschlossen ist. Die Staubabfuhr, insbesondere eine Absaugleistung, ist also auch in Bereichen des Werkzeugraumes optimal, die weit weg von der Einlassöffnung sind.The idea according to the invention is that the flow cross-section is smaller at a greater distance from the inlet opening of the dust discharge connection. As a result, an optimum suction effect is also achieved there, if advantageously e.g. a vacuum cleaner is connected to the dust discharge port. The dust removal, in particular a suction, so it is optimal even in areas of the tool room, which are far away from the inlet opening.

Der Strömungsquerschnitt kann beispielsweise stufig zunehmen. Vorteilhaft ist es jedoch, wenn der Strömungsquerschnitt im Wesentlichen kontinuierlich zunimmt. Dabei ist es möglich, dass der Strömungsquerschnitt linear zunimmt. Es ist aber auch möglich, dass der Strömungsquerschnitt in Richtung der Einlassöffnung nicht linear, beispielsweise exponentiell, zu nimmt.The flow cross section may increase, for example, in stages. However, it is advantageous if the flow cross-section increases substantially continuously. It is possible that the flow cross-section increases linearly. But it is also possible that the flow cross section in the direction of the inlet opening is not linear, for example exponentially, to.

Vorteilhaft korrespondiert eine Drehrichtung des Werkzeugs zur Werkobj ektbearbeitung und eine Strömungsrichtung der Luft in dem Staubabfuhrkanal. Die Drehrichtung und die Strömungsrichtung verlaufen beispielsweise gleichsinnig. Dadurch wird eine Strömungsverstärkung oder gar Strömungserzeugung erreicht. Mithin unterstützt oder bildet also das Werkzeug die Luftströmung.Advantageously corresponds to a direction of rotation of the tool for Werkobj ektbearbeitung and a flow direction of the air in the dust discharge channel. The direction of rotation and the flow direction, for example, run in the same direction. As a result, a flow enhancement or even flow generation is achieved. Thus, the tool supports or forms the air flow.

Es ist auch möglich, dass das Werkzeug an seiner dem Staubabfuhrkanal zugewandten Seite Flügel oder sonstige Luftmitnahmeinrichtungen zur Erzeugung oder Beschleunigung des Luftstromes aufweist. Dadurch kann das Werkzeug noch in verstärktem Maße zur Strömung in dem Staubabfuhrkanal beitragen.It is also possible that the tool has on its side facing the dust removal channel wings or other air entrainment means for generating or accelerating the air flow. As a result, the tool can still contribute to a greater extent to the flow in the dust discharge channel.

Die Deckwand ist vorteilhafterweise im Wesentlichen plan. Dadurch wird ein gutes Strömungsverhalten erzeugt. Es versteht sich, dass die jeweiligen Wände auch beispielsweise Luftführungsrippen, Kanäle oder dergleichen aufweisen können.The top wall is advantageously substantially flat. This creates a good flow behavior. It is understood that the respective walls can also have, for example, air guide ribs, channels or the like.

Der Staubabfuhrkanal verläuft zweckmäßigerweise spiralig, d.h. er hat eine Spiralform. Beispielsweise verläuft der Staubabfuhrkanal um eine Arbeitsspindel herum, an der das Werkzeug angeordnet ist.The dust removal channel is expediently spirally, i. he has a spiral shape. For example, the dust removal channel extends around a work spindle on which the tool is arranged.

In diesem Zusammenhang sei betont, dass der Werkzeugraum auch mehrere zu einem Staubabfuhranschluss führende Einlassöffnungen aufweisen kann, denen jeweils ein Staubabfuhrkanal zugeordnet ist, von denen jeweils mindestens einer einen zur Einlassöffnung hin zunehmenden Querschnitt aufweist.In this connection, it should be emphasized that the tool room can also have a plurality of inlet openings leading to a dust discharge connection, to each of which a dust removal channel is assigned, of which at least one has a cross section increasing toward the inlet opening.

Zur Zuströmung von Luft in den Staubabfuhrkanal ist vorteilhaft vorgesehen, dass dieser mindestens eine neben dem Werkzeug, beispielsweise einem Seitenrand des Werkzeugs, angeordnete Zuströmöffnung aufweist. Das Werkzeug hat beispielsweise einen Abstand zu einer Seitenwand der Abdeckhaube. Es versteht sich, dass auch mehrere Zuströmöffnungen vorgesehen sein können.For the inflow of air into the dust discharge channel is advantageously provided that this has at least one next to the tool, for example, a side edge of the tool, arranged inflow opening. The tool has, for example, a distance to a side wall of the cover. It is understood that a plurality of inflow openings can be provided.

Das Werkzeug selbst hat vorteilhafterweise Luft-Durchlassöffnungen zum Durchströmen von Luft zu dem Staubabfuhrkanal. Dadurch wird die Luftströmung verbessert. Die Luft-Durchlassöffnungen weisen zweckmäßigerweise an der Bearbeitungsseite des Werkzeugs Einlassöffnungen zum Einströmen von Luft auf. Mithin kann also die Luft bei dieser Maßnahme von der Bearbeitungsseite her in den Staubabfuhrkanal einströmen.The tool itself advantageously has air passage openings for the passage of air to the dust discharge channel. This improves the air flow. The air passage openings expediently have inlet openings for the inflow of air on the machining side of the tool. Thus, therefore, the air can flow in this measure from the processing side in the dust discharge channel.

Der Werkzeugraum ist zweckmäßigerweise seitlich durch eine Seitenwand der Abdeckhaube begrenzt. Es ist auch möglich, dass eine von der Abdeckhaube separate Seitenrandabdeckung zur seitlichen Begrenzung des Werkzeugraums vorgesehen ist. Die Seitenrandabdeckung steht zweckmäßigerweise in Richtung des Werkobjekts vor die Seitenwand vor.The tool room is expediently bounded laterally by a side wall of the cover. It is also possible that a separate from the cover side edge cover is provided for lateral delimitation of the tool room. The side edge cover is expediently in front of the side wall in the direction of the work object.

Ein Abdeckelement der Seitenrandabdeckung und/oder ein Wandsegment der Abdeckhaube sind zweckmäßigerweise zwischen einer einen Seitenrandabschnitt des Werkzeugs freigebenden Offenstellung und einer den Seitenrandabschnitt des Werkzeug verdeckenden Abdeckstellung beweglich gelagert. Wenn das Wandsegment oder das Abdeckelement in die Offenstellung geschwenkt sind, kann der Seitenrandabschnitt des Werkzeugs besser zur Werkobjektbearbeitung eingesetzt werden.A cover of the side edge cover and / or a wall segment of the cover are suitably movably mounted between a side edge portion of the tool releasing open position and the side edge portion of the tool concealing cover position. When the wall segment or the cover member is pivoted to the open position, the side edge portion of the tool can be better used for Werkobjektbearbeitung.

Das Abdeckelement und/oder das Wandsegment sind zweckmäßigerweise in der Abdeckstellung kippstabil. Somit muss der Bediener das Abdeckelement bzw. Wandsegment nicht in der jeweiligen Stellung halten. Es versteht sich, dass auch Rastmittel, Gewichtskraft oder dergleichen für eine jeweilige Festlegung des Abdeckelements oder Wandsegments in der Offenstellung oder der Abdeckstellung möglich sind. Vorteilhaft ist jedoch eine Federanordnung zum Halten des Abdeckelements oder des Wandsegments in der Offenstellung oder der Abdeckstellung. Der Bediener kippt das Abdeckelement oder das Wandsegment über einen Kippunkt oder Totpunkt. Die Federanordnung bringt und hält das Abdeckelement oder Wandsegment dann in der nachfolgenden Offenstellung oder Abdeckstellung.The cover and / or the wall segment are expediently tilt-stable in the covering position. Thus, the operator does not have to hold the cover or wall segment in the respective position. It is understood that locking means, weight or the like for a respective determination of the cover or wall segment in the open position or the covering position are possible. However, a spring arrangement for holding the cover element or the wall segment in the open position or the covering position is advantageous. The operator tilts the cover or the wall segment over a tilt point or dead center. The spring assembly brings and holds the cover or wall segment then in the subsequent open position or covering position.

Vorteilhaft ist die Seitenrandabdeckung und/oder das Abdeckelement zur Anlage an dem Werkobjekt bezüglich der Abdeckhaube beweglich gelagert. Dies bedeutet, dass die Abdeckhaube zweckmäßigerweise fest mit der Hand-Werkzeugmaschine verbunden ist, während die vergleichsweise leichte Seiterirandabdeckung oder auch nur das leichte Abdeckelement beweglich bezüglich der Abdeckhaube sind. Dadurch ist es möglich, dass die Seitenrandabdeckung und/oder das Abdeckelement optimal an einer Kontur des Werkobjekts entlang gleiten können. Die Verstellkräfte sind aufgrund der leichten Seitenrandabdeckung gering.Advantageously, the side edge cover and / or the cover is movably mounted for engagement with the work object with respect to the cover. This means that the cover is expediently firmly connected to the hand-held machine tool, while the comparatively light Seiterirandabdeckung or even the light cover element are movable with respect to the cover. This makes it possible for the side edge cover and / or the cover element to slide optimally along a contour of the work object. The adjustment forces are low due to the lightweight side edge cover.

Besonders vorteilhaft ist es, wenn eine Anlage-Federanordnung zur Belastung der Seitenrandabdeckung als Ganzes und/oder lediglich des Abdeckelements in Richtung des Werkobjekts vorgesehen ist. Die Anlage-Federanordnung "drückt" die Seitenrandabdeckung oder das Abdeckelement in Richtung des Werkobjekts, sodass sie an diesem vorteilhaft anliegen.It is particularly advantageous if a contact spring arrangement for loading the side edge cover as a whole and / or only of the cover element in the direction of the work object is provided. The abutment spring arrangement "presses" the side edge cover or the cover element in the direction of the work object, so that they rest advantageously on this.

Die Abdeckhaube und/oder die Seitenrandabdeckung, beispielsweise das Abdeckelement, hat zweckmäßigerweise an einer zur Anlage an dem Werkobjekt vorgesehenen Anlageseite eine flexible Dichtung, zumindest über einen Teilumfang. Damit ist eine dichtende Anlage an dem Werkobjekt möglich, beispielsweise um das Austreten von Staub aus einem Werkzeugraum, in dem das Werkzeug arbeitet, zu verhindern. Die Dichtung stellt vorteilhaft einen optimalen Kontakt zur dem Werkobjekt bereit, was eine verbesserte Staubabfuhr, insbesondere Staubabfuhrung, ermöglicht.The cover and / or the side edge cover, for example the cover, expediently has a flexible seal, at least over a partial circumference, on a contact side provided for bearing against the work object. For a sealing contact with the work object is possible, for example, to prevent the escape of dust from a tool room in which the tool works. The seal advantageously provides optimum contact with the work object, which enables improved dust removal, in particular dust removal.

Die flexible Dichtung kann beispielsweise einen Dichtwulst und/oder einen Dichtungsbalg, z.B. aus Kunststoff, Gummi oder dergleichen flexiblem Material, umfassen. Zweckmäßigerweise umfasst die flexible Dichtung jedoch ein Bürste. Es ist grundsätzlich möglich, dass die Seitenrandabdeckung sowohl eine Bürste als auch einen Dichtwulst, z.B. an verschiedenen Umfangsabschnitten und/oder parallel nebeneinander aufweist.The flexible seal may for example comprise a sealing bead and / or a sealing bellows, e.g. plastic, rubber or the like flexible material. Conveniently, however, the flexible seal comprises a brush. It is basically possible for the side edge cover to include both a brush and a sealing bead, e.g. has at different peripheral portions and / or parallel next to each other.

Die flexible Dichtung ist zweckmäßigerweise luftdurchlässig. Dazu sind beispielsweise Luft-Einströmungsöffnungen, ein Spalt unterhalb der Dichtung oder dergleichen vorgesehen. Eine Luftdurchlässigkeit ist bei der Bürste sozusagen automatisch vorhanden. Ist ein Dichtwulst vorgesehen, kann dieser beispielsweise Luftdurchlassöffnungen oder dergleichen aufweisen. Die Luftdurchlässigkeit ermöglicht ein Zuströmen von Luft in den sogenannten Werkzeugraum, was für eine effektive Staubabfuhr, insbesondere Staubabsaugung, vorteilhaft ist.The flexible seal is expediently permeable to air. For this purpose, for example, air inlet openings, a gap below the seal or the like are provided. Air permeability is automatically present in the brush, so to speak. If a sealing bead is provided, it can have, for example, air passage openings or the like. The air permeability allows an inflow of air into the so-called tool room, which is advantageous for effective dust removal, in particular dust extraction.

Das Werkzeug ist zweckmäßigerweise ein Schleifwerkzeug, beispielsweise ein Schleifpad, das zweckmäßigerweise mit einem Schleifmittel, z.B. einer Schleifscheibe, versehen ist. Das Werkzeug kann aber auch eine Schleifscheibe sein. Die Erfindung ist bei Hand-Werkzeugmaschinen zur feinen Schleifbearbeitung genauso einsetzbar, wie bei beispielsweise Beton-Schleifmaschinen oder sonstigen Schleifmaschinen, die eine stark abrasive Wirkung haben. Das Schleifpad oder die Schleifscheibe haben zweckmäßigerweise Durchlassöffnungen zum Durchströmen von Luft in den Staubabfuhrkanal.The tool is expediently a grinding tool, for example a grinding pad, which is expediently provided with an abrasive, eg a grinding wheel. The tool can also be a grinding wheel. The invention is in hand machine tools for fine grinding as applicable, as in concrete grinding machines or other grinding machines, which have a strong abrasive effect. The grinding pad or the grinding wheel expediently have passage openings for the passage of air into the dust removal channel.

Es versteht sich, dass die Erfindung auch bei Hand-Werkzeugmaschinen zur trennenden Werkobjektbearbeitung einsetzbar ist, beispielsweise bei Sägen, Trennschleifern oder dergleichen.It is understood that the invention can also be used in manual machine tools for separating work object processing, for example in saws, cut-off grinders or the like.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert. Es zeigen:

Fig. 1a, 1b
perspektivische Schrägansichten einer erfin- dungsgemäßen Hand-Werkzeugmaschine mit ge- schlossenem und geöffnetem Abdeckelement,
Fig. 2a
eine Querschnittsansicht der Hand- Werkzeugmaschine gemäß Figur 1b etwa entlang einer Schnittlinie C-C in Figur 3a, wobei das Abdeckelement in einer Totpunktlage zwischen einer in
Fig. 2b
entsprechend einem Ausschnitt B von Figur 2a dargestellten Abdeckstellung und einer in
Fig. 2c
dargestellten Offenstellung des Abdeckelements steht,
Fig. 3a, 3b
Frontalansichten der Hand-Werkzeugmaschine mit geschlossenem und geöffneten Abdeckelement,
Fig. 4
eine perspektivische teilweise geschnittene Schrägansicht einer Unterseite der Hand- Werkzeugmaschine gemäß der vorgenannten Figuren,
Fig. 5
eine Teilansicht der Hand-Werkzeugmaschine ge- mäß Figur 4, jedoch mit leicht verschwenkter Perspektive, und
Fig. 6
eine weitere Ansicht der Hand-Werkzeugmaschine mit entferntem Abdeckelement und teilweise ge- schnittenem Werkzeug schräg von vorn.
Hereinafter, an embodiment of the invention will be explained with reference to the drawing. Show it:
Fig. 1a, 1b
perspective oblique views of a hand-held power tool according to the invention with closed and opened cover element,
Fig. 2a
a cross-sectional view of the hand machine tool according to FIG. 1b approximately along a section line CC in FIG. 3a wherein the cover member in a dead center between an in
Fig. 2b
corresponding to a section B of FIG. 2a illustrated cover position and a in
Fig. 2c
shown open position of the cover,
Fig. 3a, 3b
Frontal views of the hand machine tool with closed and opened cover element,
Fig. 4
a perspective partially sectioned oblique view of an underside of the hand-held power tool according to the aforementioned figures,
Fig. 5
a partial view of the hand machine tool according to FIG. 4 but with slightly tilted perspective, and
Fig. 6
Another view of the hand-held machine tool with removed cover and partially cut tool diagonally from the front.

Eine in der Zeichnung dargestellte Hand-Werkzeugmaschine 10 ist beispielsweise eine Hand-Schleifmaschine 11. Ein in ein Gehäuse 12 der Hand-Werkzeugmaschine 10 aufgenommener Antriebsmotor 13, vorliegend ein elektrischer Motor, treibt über ein Getriebe 14, zweckmäßigerweise ein Winkelgetriebe, insbesondere ein Kegelradgetriebe, eine Werkzeugspindel 15 an, an deren vorderem freiem Ende eine Werkzeugaufnahme 16 angeordnet ist. Zur elektrischen Stromversorgung kann die Hand-Werkzeugmaschine 10 mittels eines Anschlusskabels 17 an ein Stromversorgungsnetz angeschlossen werden. Es versteht sich, dass alternativ oder ergänzend auch ein Betrieb mittels eines Akkumulator-Speichers oder dergleichen möglich ist.A hand-held power tool 10 shown in the drawing is, for example, a hand-held grinding machine 11. A drive motor 13 accommodated in a housing 12 of the hand-held power tool 10, in the present case an electric motor, drives a bevel gear, advantageously a bevel gear, via a gear 14. a tool spindle 15, at the front free end of a tool holder 16 is arranged. For electrical power supply, the hand-held power tool 10 can be connected by means of a connecting cable 17 to a power supply network. It is understood that alternatively or additionally also an operation by means of an accumulator memory or the like is possible.

Ein Bediener kann die Hand-Werkzeugmaschine 10 beispielsweise an einem von der Werkzeugaufnahme 16 entfernteren Handgriffabschnitt 18 ergreifen, wo ein Schalter 23 zum Ein- und Ausschalten des Antriebsmotors 13 angeordnet ist, sowie optional auch an einem zweckmäßigerweise bügelartigen Handgriff 19, der näher bei der Werkzeugaufnahme 16, beispielsweise oberhalb derselben, angeordnet ist. Der Handgriff 19 ist in der Querschnittsdarstellung gemäß Figur 2a weggelassen. Der Handgriff 19 ist zweckmäßigerweise schwenkbar und mittels einer Feststellschraube 20 festlegbar, sodass der Bediener die Hand-Werkzeugmaschine 10 optimal an seine ergonomischen Bedürfnisse anpassen kann. Der Bediener kann die Hand-Werkzeugmaschine 10 mit beiden Händen ergreifen und somit sicher führen.An operator may, for example, grasp the hand machine tool 10 at a handle portion 18 remote from the tool holder 16, where a switch 23 is arranged to turn the drive motor 13 on and off, and optionally also at a conveniently bow-type handle 19 closer to the tool holder 16, for example, above the same, is arranged. The handle 19 is in the cross-sectional view according to FIG. 2a omitted. The handle 19 is suitably pivotable and fixable by means of a locking screw 20, so that the operator can adjust the hand-held machine tool 10 optimally to his ergonomic needs. The operator can grasp the hand-held power tool 10 with both hands and thus lead safely.

Aber auch im Hinblick auf Bedienerschutz und Arbeitssicherheit ist die Hand-Werkzeugmaschine 10 optimal:

  • Ein an der Werkzeugaufnahme 16 befestigbares Werkzeug 21 rotiert beim Betrieb der Hand-Werkzeugmaschine 10. Das Werkzeug 21 ist ein Schleif-Werkzeug zur abrasiven Bearbeitung eines Werkobjekts 22 oder einer werkobjektoberfläche. Im vorliegenden Fall ist die Hand-Schleifmaschine 11 ein Betonschleifer. Das Werkobjekt 22 ist beispielsweise ein Betonboden, eine Betonwand oder dergleichen.
But also with regard to operator protection and occupational safety, the hand-held machine tool 10 is optimal:
  • A tool 21 which can be fastened to the tool holder 16 rotates during operation of the hand-held machine tool 10. The tool 21 is a grinding tool for the abrasive machining of a work object 22 or a work object surface. In the present case, the hand grinder 11 is a concrete grinder. The work object 22 is for example a concrete floor, a concrete wall or the like.

Es sind also effektive Maßnahmen zweckmäßig, dass das Werkzeug 21 beim Betrieb nicht frei zugänglich ist, sodass Verletzungen des Bedieners vermieden werden.Thus, effective measures are expedient that the tool 21 is not freely accessible during operation, so that injuries to the operator are avoided.

Zudem entsteht beim Betrieb des Werkzeugs 21 eine große Menge von Staub, was den Bediener gesundheitlich schädigen kann.In addition, the operation of the tool 21 creates a large amount of dust, which can harm the operator's health.

Eine nachfolgend im einzelnen beschriebene Abdeckvorrichtung 24 schafft hier effektiv und komfortabel Abhilfe:

  • Die Abdeckvorrichtung 24 umfasst einen Werkzeugraum 26 zur Aufnahme und zum zumindest teilweisen, vorliegend vollständigen Überdecken des Werkzeugs 21. Der Werkzeugraum 26 ist zu einem Großteil in einer Abdeckhaube 25 der Abdeckvorrichtung 24 vorgesehen. Zur im wesentlichen vollständigen Abdeckung eines Seitenrands 28 des Werkzeugs 21 ist eine Seitenrandabdeckung 27 vorgesehen, die das Werkzeug 21 vorliegend ringförmig umgibt. Die Seitenrandabdeckung 27 ist korrespondierend mit dem kreisrunden Außenumfang des Werkzeugs 21, vorliegend einer Schleifscheibe, kreisrund.
A covering device 24 described in detail here provides effective and convenient remedy:
  • The covering device 24 comprises a tool space 26 for receiving and for at least partially, in the present case completely covering the tool 21. The tool space 26 is provided to a large extent in a covering hood 25 of the covering device 24. For substantially complete coverage of a side edge 28 of the tool 21 is a side edge cover 27 is provided, which surrounds the tool 21 present annular. The side edge cover 27 is circular in correspondence with the circular outer periphery of the tool 21, here a grinding wheel.

Letztlich ist also das Schleif-Werkzeug 21 entsprechend der Darstellung von beispielsweise Figur 3b in dem von der Abdeckhaube 25 in der Seitenrandabdeckung 27 begrenzten Werkzeugraum 26 aufgenommen.Ultimately, therefore, the grinding tool 21 according to the illustration of example FIG. 3b taken up in the limited by the cover 25 in the side edge cover 27 tool space 26.

Ein Haubenkörper 29 ist mit dem Gehäuse 12 im wesentlichen starr verbunden, beispielsweise mittels Schrauben 30. An der Oberseite des Haubenkörpers 29 sind zweckmäßigerweise Verstärkungsrippen angebracht, was dessen mechanische Stabilität verbessert.A hood body 29 is connected to the housing 12 substantially rigidly, for example by means of screws 30. At the top of the hood body 29 reinforcing ribs are expediently mounted, which improves its mechanical stability.

Das Gehäuse 12 und der Haubenkörper 29 als Hauptbestandteil der Abdeckhaube 25 bilden zweckmäßigerweise eine starre Baueinheit. Hier sei angemerkt, dass selbstverständlich auch eine flexible Lagerung der Abdeckhaube bezüglich des Gehäuses 12 möglich ist oder eine Anordnung getroffen sein kann, bei der der Haubenkörper ein Bestandteil des Gehäuses einer Hand-Werkzeugmaschine bildet. Jedenfalls ist die Position des Werkzeugs 21 bezüglich des Werkzeugraum 26 durch die starre Verbindung des Haubenkörpers 29 mit dem Gehäuse 12 eindeutig festgelegt. Dennoch hat die Abdeckvorrichtung 24 eine Beweglichkeit zur flexiblen Anpassung an einen jeweiligen zu bearbeitenden Untergrund.The housing 12 and the hood body 29 as the main component of the cover 25 expediently form a rigid structural unit. It should be noted that, of course, a flexible mounting of the cover with respect to the housing 12 is possible or an arrangement may be made, in which the hood body forms a part of the housing of a hand-held machine tool. In any case, the position of the tool 21 with respect to the tool space 26 by the rigid connection of the hood body 29 with the housing 12 is clearly defined. Nevertheless, the cover 24 has a mobility for flexible adaptation to a respective substrate to be processed.

Die Seitenrandabdeckung 27 ist nämlich bezüglich der Abdeckhaube 25, insbesondere bezüglich des Haubenkörpers 29, beweglich gelagert. Ein Basisteil 31 der Seitenrandabdeckung 27 ist mit einer Führung 32 an dem Haubenkörper 29 beweglich gelagert. Die Führung 32 umfasst eine Führungsnut 33 an einem Radialvorsprung 34 eines Abdeckoberteils 35 der Abdeckhaube 25. Das Abdeckoberteil 35 umfasst eine Deck-Wand 36 des Werkzeugraums 26, die der Werkzeug-Oberseite 37 des Werkzeugs 21 zugewandt ist. Der Radialvorsprung 34 bildet sozusagen eine radiale Fortsetzung der Deck-Wand 36 und ist mit dieser einstückig.Namely, the side edge cover 27 is movably supported with respect to the cover hood 25, in particular with respect to the hood body 29. A base part 31 of the side edge cover 27 is movably supported by a guide 32 on the hood body 29. The guide 32 comprises a guide groove 33 at one Radial projection 34 of a Abdeckoberteils 35 of the cover 25. The Abdeckoberteil 35 includes a cover wall 36 of the tool space 26, which faces the tool top 37 of the tool 21. The radial projection 34 forms, as it were, a radial continuation of the cover wall 36 and is integral therewith.

Eine Umfangswand 38 der Abdeckhaube 25 umgibt den Seitenrand 28 des Werkzeugs 21. Die Umfangswand 38 steht in Richtung des Werkzeugs 21 nach unten vor das Abdeckoberteil 35 vor. Die Umfangswand 38 bildet einen einstückigen Bestandteil des Abdeckoberteils 35. Die Umfangswand 38 bildet einen mechanischen Seitenschutz, innerhalb dessen das Werkzeug 21 angeordnet ist.A peripheral wall 38 of the cover 25 surrounds the side edge 28 of the tool 21. The peripheral wall 38 projects downwardly in the direction of the tool 21 in front of the cover top 35. The peripheral wall 38 forms an integral part of the Abdeckoberteils 35. The peripheral wall 38 forms a mechanical side protection, within which the tool 21 is arranged.

Ein Innenumfang des Basisteils 31 liegt mit Bewegungsspiel am Aussenumfang der Umfangswand 38 an, was eine zusätzliche Führung bewirkt.An inner circumference of the base part 31 abuts with movement play on the outer circumference of the peripheral wall 38, which causes an additional guidance.

Schrauben 39, die in den Schraubaufnahmen 40 des Haubenkörpers 29 eingeschraubt sind, halten die Seitenrandabdeckung 27 an der Abdeckhaube 25. Die Schraubaufnahmen 40 sind beispielsweise zwischen Wandabschnitten der Umfangswand 38 oder neben der Umfangswand 38 angeordnet. Beispielsweise sind drei Schraubaufnahmen 40 im gleichen Abstand zueinander vorgesehen. Jedenfalls haben die Schraubaufnahmen 40 einen derartigen Abstand zu der Seitenrandabdeckung 27 dass Köpfe der Schrauben 39, die in die Schraubaufnahmen 40 eingeschraubt sind, die Seitenrandabdeckung 27 überkragen und sie somit an dem Haubenkörper 29 halten. Zwischen den Schraubenköpfen und der Seitenrandabdeckung 27 ist ein Bewegungsspiel vorgesehen.Screws 39, which are screwed into the screw receptacles 40 of the hood body 29, hold the side edge cover 27 on the covering hood 25. The screw receptacles 40 are arranged, for example, between wall sections of the peripheral wall 38 or beside the peripheral wall 38. For example, three screw receptacles 40 are provided at the same distance from each other. In any case, the screw receptacles 40 have such a distance from the side edge cover 27 that heads of the screws 39 which are screwed into the screw receptacles 40, the side edge cover 27 overhang and thus hold them on the hood body 29. Between the screw heads and the side edge cover 27 a movement play is provided.

Eine Anlage-Federanordnung 41 mit Federn 42 belastet die Seitenrandabdeckung 27 als Ganzes in Richtung des Werkobjekts 22. Die Federn 42 sind beispielsweise zwischen dem Abdeckoberteil 35, insbesondere dessen Radialvorsprung 34, und dem Basisteil 31 der Seitenrandabdeckung 27 vorgesehen. Beispielsweise sind vier Federn 42 vorgesehen, deren Abstand zueinander zweckmäßigerweise im wesentlichen gleich ist. In Figur 1b sind die beiden vorderen Federn 42 sichtbar. Um die Seitenrandabdeckung 27 verkantungsfrei und gleichmäßig in Richtung des Werkobjekts 22 zu belasten, sind zweckmäßigerweise auch an der vom Betrachter abgewandten Seite der Seitenrandabdeckung 27 Federn 42 vorgesehen.An abutment spring arrangement 41 with springs 42 loads the side edge cover 27 as a whole in the direction of the work object 22. The springs 42 are provided for example between the Abdeckoberteil 35, in particular its radial projection 34, and the base part 31 of the side edge cover 27. For example, four springs 42 are provided, the distance of which is expediently substantially the same. In Figure 1b, the two front springs 42 are visible. In order to load the side edge cover 27 without jamming and uniformly in the direction of the work object 22, springs 42 are expediently also provided on the side of the side edge cover facing away from the viewer.

Der Radialvorsprung 34 steht als eine Art Kranz vor die Deck-Wand 36 bzw. das Abdeckoberteil 35 vor. Der Radialvorsprung 34 ist im wesentlichen ringförmig und erstreckt sich über den gesamten Außenumfang der Abdeckhaube 25 mit Ausnahme eine vorderen Bereiches.The radial projection 34 protrudes as a kind of wreath in front of the top wall 36 and the top cover 35, respectively. The radial projection 34 is substantially annular and extends over the entire outer periphery of the cover 25 except for a front portion.

Die Seitenrandabdeckung 27 weist ein Abdeckelement 43 auf, das mittels eines Schwenklagers 44 bezüglich der übrigen Komponenten der Abdeckvorrichtung 24 zwischen einer Abdeckstellung A, bei der es den Seitenrand 28 des Werkzeugs 21 abdeckt und einer Offenstellung O verschwenkbar gelagert, in der das Abdeckelement 43 einen Seitenrandabschnitt 45 des Werkzeugs 21 freigibt. Die Umfangswand 38 hat im Bereich des Abdeckelements 43 einen Ausschnitt, durch den das Werkzeug 21 nach vorn aus dem Werkzeugraum 26 vorsteht. Bei hochgeklapptem, in Offenstellung O befindlichen Abdeckelement 43 ist eine optimale Randbearbeitung des Werkobjekts 22 oder einer sonstigen zu bearbeitenden Oberfläche möglich. Ferner ist optional vorgesehen, dass an einer Vorderwand 46 des Basisteils 31 ein Ausschnitt 47 vorgesehen ist, durch den das Werkzeug 21 vorstehen kann.The side edge cover 27 has a cover 43, which by means of a pivot bearing 44 with respect to the other components of the cover 24 between a covering position A, in which it covers the side edge 28 of the tool 21 and an open position O pivotally mounted, in which the cover 43 has a side edge portion 45 of the tool 21 releases. The peripheral wall 38 has in the region of the cover 43 a cutout, through which the tool 21 protrudes forward from the tool room 26. When folded up, located in the open position O cover 43 is an optimal edge processing of the work object 22 or other surface to be machined possible. Furthermore, it is optionally provided that on a front wall 46 of the base part 31, a cutout 47 is provided, through which the tool 21 can protrude.

Das Schwenklager 44 ist zwischen dem Basisteil 31 und dem Abdeckelement 43 vorgesehen. Somit ist das Abdeckelement 43 einem Basisteil 31 schwenkbar angelenkt und macht dessen Bewegungen mit. Mithin bewegt sich also die Seitenrandabdeckung 27 als Ganzes bezüglich des am Gehäuse 12 fest montierten Haubenkörpers 29, was eine optimale Anpassung an eine Werkobjektkontur ermöglicht.The pivot bearing 44 is provided between the base part 31 and the cover 43. Thus, the cover 43 is pivoted to a base member 31 and makes its movements with. Thus, therefore, the side edge cover 27 moves as a whole with respect to the hood body 29 fixedly mounted on the housing 12, which allows an optimal adaptation to a work object contour.

Zur flexiblen Anpassung an eine Werkobjektoberfläche oder Bearbeitungsoberfläche trägt auch bei, dass die Seitenrandabdeckung 27 eine flexible Dichtung 48 aufweist. Zwar wäre es möglich, dass die flexible Dichtung 48 zumindest abschnittsweise durch einen Gummiwulst oder dergleichen gebildet ist. Beim Ausführungsbeispiel ist jedoch eine Bürste 49 vorgesehen, die sich nicht nur optimal an einen Untergrund anpasst, sondern zudem noch luftdurchlässig ist, was für eine effektive Staubabfuhr, insbesondere Staubabsaugung, vorteilhaft ist.For flexible adaptation to a work object surface or processing surface also contributes that the side edge cover 27 has a flexible seal 48. Although it is possible that the flexible seal 48 is at least partially formed by a rubber bead or the like. In the embodiment, however, a brush 49 is provided, which not only optimally adapts to a substrate, but also still permeable to air, which is advantageous for effective dust removal, in particular dust extraction.

Die Bürste 49 erstreckt sich um den gesamten Umfang der Seitenrandabdeckung 27, sodass sowohl am Basisteil 31 als auch am Abdeckelement 43 Borsten vorgesehen sind.The brush 49 extends around the entire circumference of the side edge cover 27, so that 43 are provided on both the base member 31 and the cover 43 bristles.

Die Bürste 49 bildet eine Art Bürstenkranz, die den Werkzeugraum 26 ringförmig umgibt.The brush 49 forms a kind of brush ring, which surrounds the tool space 26 annular.

Die Anlage-Federanordnung 41 drückt die Seitenrandabdeckung 27 von der Abdeckhaube 25 weg, sodass die Dichtung 48 vor die Umfangswand 38 vorsteht (Fig. 3b, 4). Die Seitenrandabdeckung 27 einschließlich des Bürstkranzes mit der Bürste 49 hat ein geringes Gewicht, sodass sie bezüglich der übrigen Komponenten der Hand-Werkzeugmaschine 10, insbesondere des Gehäuses 12 leicht bewegbar ist und eine optimale Anpassung an einen zu bearbeitenden Untergrund gelingt. Wenn beispielsweise ein Fußboden bearbeitet werden soll, die Hand-Werkzeugmaschine beispielsweise die in Figur 3b angezeigte Lage einnimmt, genügt an sich schon die Gewichtskraft der auf der Anlage-Federanordnung 41 auflastenden Komponenten dazu, dass die Seitenrandabdeckung 27 in Richtung der Abdeckhaube 25 bewegt wird, und Abrasiv-Vorsprünge 50 an einer Bearbeitungsseite 51 des Werkzeugs 21 in Kontakt mit einem zu bearbeitenden Werkobjekt gelangen (Figur 3b).The abutment spring assembly 41 pushes the side edge cover 27 away from the cover 25 so that the seal 48 protrudes in front of the peripheral wall 38 ( Fig. 3b . 4 ). The side edge cover 27 including the Bürstkranzes with the brush 49 has a low weight, so that it is easily movable with respect to the other components of the hand-held machine tool 10, in particular of the housing 12 and an optimal adaptation to a substrate to be machined succeeds. For example, if a floor is to be machined, the hand machine tool for example, the in FIG. 3b As shown in FIG assumes the weight of force on the contact spring assembly 41 auflastenden components that the side edge cover 27 is moved in the direction of the cover 25, and Abrasiv-projections 50 on a processing side 51 of the tool 21 in contact with one arrive at the processing work object ( FIG. 3b ).

Eine nicht dargestellte Alternative könnte vorsehen, dass ein Abdeckelement in der Art des Abdeckelements 43 schwenkbar an einem feststehenden Bauteil einer Hand-Werkzeugmaschine gelagert ist. Zweckmäßigerweise ist auch dann vorgesehen, dass das Abdeckelement bezüglich des feststehenden Teils, insbesondere schwimmend, beweglich ist, etwa in der Art der Seitenrandabdeckung 27.An alternative, not shown, could provide that a cover element in the manner of the cover 43 is pivotally mounted on a stationary component of a hand-held machine tool. Conveniently, it is also provided that the cover is movable relative to the fixed part, in particular floating, about in the manner of the side edge cover 27th

Das Abdeckelement 43 ist kippstabil in der Offenstellung O oder der Abdeckstellung A. Das Abdeckelement43 kippt über eine Totpunktlage (Figur 2a) entweder in die Abdeckstellung A (Figur 2b) oder in die Offenstellung O (Figur 2c). Der Bediener der Hand-Werkzeugmaschine 10 muss also das Abdeckelement 43 nicht in der Offenstellung O oder Abdeckstellung A halten. Das Abdeckelement 43 nimmt die jeweilige Lage selbsttätig ein. Zusätzlich könnte zum Halten des Abdeckelements 43 in der jeweiligen Lage eine Verrastung, eine Magnethalterung oder dergleichen vorgesehen sein.The covering element 43 is tilt-stable in the open position O or the covering position A. The covering element 43 tilts over a dead center position (FIG. FIG. 2a ) either in the covering position A ( FIG. 2b ) or in the open position O ( Figure 2c ). The operator of the hand-held machine tool 10 therefore does not have to hold the cover element 43 in the open position O or cover position A. The cover 43 takes the respective position automatically. In addition, a latch, a magnet holder or the like could be provided for holding the cover 43 in the respective position.

Bei der Hand-Werkzeugmaschine 10 ist jedoch eine andere Maßnahme getroffen: Eine Federanordnung 52 mit einer Feder 53 hält das Abdeckelement 43 in der Abdeckstellung A oder der Offenstellung O. Die Feder 42 ist einerseits am Basisteil 31 mit einer Federhalterung 54 und andererseits an dem Abdeckelement 43 mittels einer Federhalterung 55 angelenkt. Die Federhalterung 55 ist etwa im Bereich einer Schwenkachse des Schwenklagers 44 vorgesehen. Die Feder 53 ist beispielsweise zwischen zwei Schwenklagerteilen des Schwenklagers 44 angeordnet. Die Federhalterung 55 schwenkt sozusagen um die Federhalterung 54 zwischen der Abdeckstellung A und der Offenstellung O über die Totpunktlage gemäß Figur 2a hinweg. Durch die Federanordnung 52 wird das Abdeckelement 43 sicher in der Offenstellung O oder Abdeckstellung A gehalten. Die Bedienung ist besonders einfach. Zweckmäßigerweise ist für die Feder 53 eine Ausnehmung 56 an dem Abdeckelement 43 vorgesehen.However, in the manual power tool 10, another measure is taken: A spring assembly 52 with a spring 53 holds the cover 43 in the covering position A or the open position O. The spring 42 is on the one hand on the base part 31 with a spring holder 54 and on the other hand on the cover 43 hinged by means of a spring holder 55. The spring holder 55 is approximately in the region of a pivot axis of the Swivel bearings 44 provided. The spring 53 is arranged, for example, between two pivot bearing parts of the pivot bearing 44. The spring holder 55 pivots, so to speak, around the spring holder 54 between the covering position A and the open position O via the dead center position FIG. 2a time. By the spring assembly 52, the cover 43 is held securely in the open position O or covering position A. The operation is very easy. Conveniently, a recess 56 is provided on the cover 43 for the spring 53.

Zu einer effektiven Staubabfuhr, insbesondere Staubabsaugung, aus dem Werkzeugraum 26 ist ein innovatives Abfuhrkonzept oder Absaugkonzept vorgesehen:

  • An der Abdeckhaube 25 ist ein Staubabfuhranschluss 60 zum Anschluss eines staubabsaugenden Gerätes, eines Staubsackes oder dergleichen vorgesehen. Der Staubabfuhranschluss 60 enthält beispielsweise einen Anschlussstutzen 61, der vor eine Außenseite der Abdeckhaube 25 vorsteht.
For an effective removal of dust, in particular dust extraction, from the tool room 26, an innovative discharge concept or extraction concept is provided:
  • At the cover 25, a dust discharge port 60 for connecting a dust-extracting device, a dust bag or the like is provided. The dust removal port 60 includes, for example, a connecting piece 61, which protrudes in front of an outer side of the cover 25.

In dem Werkzeugraum 26 ist zwischen dem Werkzeug 21 und einer Wand des Werkzeugraums 26 ein Staubabfuhrkanal 62 gebildet, der zu einer Einlassöffnung 63 des Staubabfuhranschlusses 60 führt. Ein Strömungsquerschnitt des Staubabfuhrkanals 62 nimmt von dessen Anfang 64 bis zu der Einlassöffnung 63 zu. Dadurch ist nicht nur im Bereich der Einlassöffnung 63, d.h. am Auslass für einen Staubluftstrom 65, ein optimaler Abführ- oder Absaugeffekt erzielbar, sondern auch am Anfang 64 des Staubabfuhrkanals 62.In the tool space 26, a dust removal channel 62 is formed between the tool 21 and a wall of the tool room 26, which leads to an inlet opening 63 of the dust removal terminal 60. A flow area of the dust discharge passage 62 increases from its start 64 to the inlet port 63. As a result, not only in the region of the inlet opening 63, i. at the outlet for a dust air flow 65, an optimal laxative or suction effect can be achieved, but also at the beginning 64 of the dust discharge channel 62nd

Der Staubabfuhrkanal 62 verläuft spiralig um die Werkzeugspindel 15 herum.The dust removal channel 62 spirals around the tool spindle 15 around.

Der Staubabfuhrkanal 62 ist zwischen der Werkzeugoberseite 37 des Werkzeugs 21 und der dieser zugewandten Deck-Wand 36 des Werkzeugraums 26 vorgesehen. Die Deck-Wand 36 ist zweckmäßigerweise plan, was ein optimales Strömungsverhalten ermöglicht.The dust removal channel 62 is provided between the tool upper side 37 of the tool 21 and the cover wall 36 of the tool space 26 facing it. The cover wall 36 is expediently flat, which allows optimum flow behavior.

Seitlich wird der Staubabfuhrkanal 62 durch die Seitenwand/Umfangswand 38 begrenzt. Allerdings ist zwischen der Umfangswand 38 und dem Seitenrand 28 des Werkzeugs 21 ein Spalt vorhanden, durch den Luft in den Staubabfuhrkanal 62 strömen kann. Diese zuströmende Luft strömt durch die luftdurchlässige Dichtung 48, vorliegend die Bürste 49, hindurch und an der unteren Stirnseite der Seitenwand/Umfangswand 38 vorbei in den Staubabfuhrkanal 62 ein.Laterally, the dust removal channel 62 is limited by the side wall / peripheral wall 38. However, there is a gap between the peripheral wall 38 and the side edge 28 of the tool 21 through which air can flow into the dust discharge channel 62. This inflowing air flows through the air-permeable seal 48, in this case the brush 49, through and past the lower end side of the side wall / peripheral wall 38 into the dust discharge channel 62.

Zu dem sind Luft-Durchlassöffnungen 66 am Werkzeug 21 vorgesehen, durch die Luft in den Staubabfuhrkanal 62 einströmen kann. Die Luft-Durchlassöffnungen 66 erstrecken sich von der Bearbeitungsseite 51 des Werkzeugs 21 zu dessen Oberseite 37.To the air passage openings 66 are provided on the tool 21, through which air can flow into the dust discharge channel 62. The air passage openings 66 extend from the machining side 51 of the tool 21 to the upper side 37 thereof.

Eine Drehrichtung des Werkzeugs 21 entspricht einer Strömungsrichtung des Staubluftstroms 65, was dessen Strömung verstärkt. Der Staubluftstrom 65 ist als Pfeil eingezeichnet, der die Strömungsrichtung des Staubluftstroms 65 anzeigt.A rotational direction of the tool 21 corresponds to a flow direction of the dusty air flow 65, which increases its flow. The dust air flow 65 is shown as an arrow indicating the flow direction of the dust air flow 65.

Die Deck-Wand 36 kann vorteilhaft ein Plattenbauteil sein, beispielsweise aus Kunststoff, das an die Innenseite zur Bildung einer oberen Wand des Werkzeugraums 26 an den Haubenkörper angeschraubt ist. Selbstverständlich kann die Deck-Wand 36 auch einen integralen Bestandteil des Haubenkörpers 29 bilden.The cover wall 36 may advantageously be a plate component, for example of plastic, which is screwed to the inside to form an upper wall of the tool space 26 to the hood body. Of course, the cover wall 36 may also form an integral part of the hood body 29.

Die Dichtung 48 bzw. Bürste 49 ist luftdurchlässig. Dadurch ist es möglich, dass Zuluft 67 durch die Borsten der Bürste 49 hindurch und an den vorderen, freien Seite der Umfangswand 38 vorbei in den Staubabfuhrkanal 62 einströmen kann, wobei diese Zuluft in den Ringspalt zwischen der Umfangswand 38 und dem Seitenrand des Werkzeugs 21 und durch die Luft-Durchlassöffnungen 66 am Werkzeug 21 strömt. Die Umfangswand 38 ist bei diesem innovativen Konzept insofern vorteilhaft, als sie den Staubabfuhrkanal 62 seitlich begrenzt und somit ein optimales Strömen in Richtung der Einlassöffnung 63 ermöglicht. Dabei kann die Zuluft 67 dennoch ungehindert einströmen, sodass kein strömungshindernder Unterdruck entsteht.The seal 48 or brush 49 is permeable to air. This makes it possible that supply air 67 through the bristles of the brush 49 can flow and past the front, free side of the peripheral wall 38 in the dust discharge channel 62, said supply air flows into the annular gap between the peripheral wall 38 and the side edge of the tool 21 and through the air passage openings 66 on the tool 21. The peripheral wall 38 is advantageous in this innovative concept insofar as it laterally delimits the dust removal channel 62 and thus enables optimum flow in the direction of the inlet opening 63. The supply air 67 can still flow freely, so that no flow-preventing negative pressure is created.

Claims (15)

  1. Hand-operated power tool with a tool holder (16), which may be rotary-driven by a drive motor, for a tool (21) with a machining side (51) for abrasive and/or cutting machining of a work object, with an outer casing (25) with a tool space (26) to accommodate the tool (21) and to cover the tool (21) at least partly, and with a dust removal connection (60) for the removal from the tool space (26) of the outer casing (25) of dust occurring during operation of the grinding tool, wherein between the tool (21) and one wall of the tool space (26) there is formed a dust removal duct (62) leading to an inlet orifice (63) of the dust removal connection (60), and wherein a flow cross-section of the dust removal duct (62) increases towards the inlet orifice (63), characterised in that the dust removal duct (62) is provided between a tool upper side (37) of the tool (21) and a covering side (36) of the tool space (26) facing the tool upper side (37).
  2. Hand-operated power tool according to claim 1, characterised in that the flow cross-section of the dust removal duct (62) increases substantially continuously towards the inlet orifice (63).
  3. Hand-operated power tool according to claim 1 or 2, characterised in that a direction of rotation of the tool (21) for work object machining and a direction of the air flow in the dust removal duct (62) are identical.
  4. Hand-operated power tool according to any of the preceding claims, characterised in that the covering side (36) is substantially flat.
  5. Hand-operated power tool according to any of the preceding claims, characterised in that the tool (21) has, on that side of it facing the dust removal duct (62), blades for generating or accelerating an airflow.
  6. Hand-operated power tool according to any of the preceding claims, characterised in that the dust removal duct (62) runs spirally.
  7. Hand-operated power tool according to any of the preceding claims, characterised in that the dust removal duct (62) has at least one inflow orifice positioned next to the tool (21), in particular next to a side edge (28) of the tool (21).
  8. Hand-operated power tool according to any of the preceding claims, characterised in that the tool (21) has through airflow openings (66) for the passage of air to the dust removal duct (62), wherein the through airflow openings (66) expediently have inlet orifices (63) on the machining side (51) of the tool (21) for the inflow of air.
  9. Hand-operated power tool according to any of the preceding claims, characterised in that the tool space (26) is bounded at the side by a side wall (38) of the outer casing (25) and/or by a side edge covering (27) separate from the outer casing (25).
  10. Hand-operated power tool according to any of the preceding claims, characterised in that a covering element (43) of the side edge covering (27) and/or a wall segment of the outer casing (25) are/is movably mounted between an open position (O) opening a side edge section (45) of the tool (21), and a covering position (A) covering the side edge section (45) of the tool (21).
  11. Hand-operated power tool according to claim 10, characterised in that the covering element (43) and/or the wall segment in the open position (O) and/or the covering position (A) assume a stable position and/or that a spring assembly (52) is provided to hold the covering element (43) or the wall segment in the open position (O) and/or the covering position (A).
  12. Hand-operated power tool according to any of the preceding claims, characterised in that the side edge covering (27) as a whole and/or a covering element (43) are movably mounted to fit up against the work object (22) relative to the outer casing (25).
  13. Hand-operated power tool according to claim 12, characterised in that it has a contact spring assembly (41) to bias the side edge covering (27) as a whole and/or the covering element (43) towards the work object (22).
  14. Hand-operated power tool according to any of the preceding claims, characterised in that the outer casing (25) and/or the side edge covering (27), in particular the covering element (43), have/has a flexible seal (48), at least on part of their periphery, on a contact side provided for contact with the work object (22), wherein the flexible seal (48) is expediently air-permeable and/or advantageously comprises a brush (49).
  15. Hand-operated power tool according to any of the preceding claims, characterised in that the tool (21) is a grinding tool, in particular a grinding pad or a grinding disc, and/or the hand-operated power tool (10) is a concrete grinding machine.
EP09008423A 2008-09-12 2009-06-27 Hand-held power tool with a covering cap and a dust removal connection Active EP2163356B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09008423T PL2163356T3 (en) 2008-09-12 2009-06-27 Hand-held power tool with a covering cap and a dust removal connection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008046947A DE102008046947A1 (en) 2008-09-12 2008-09-12 Hand machine tool with a cover and a dust removal port

Publications (3)

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EP2163356A2 EP2163356A2 (en) 2010-03-17
EP2163356A3 EP2163356A3 (en) 2010-09-22
EP2163356B1 true EP2163356B1 (en) 2011-11-02

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EP (1) EP2163356B1 (en)
AT (1) ATE531487T1 (en)
DE (1) DE102008046947A1 (en)
PL (1) PL2163356T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101390936B1 (en) 2012-07-13 2014-05-02 삼성중공업 주식회사 grinder unit
US9289879B2 (en) 2013-05-02 2016-03-22 Black & Decker Inc. Hinge assembly for an angle grinder dust shroud

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012111989A1 (en) 2012-12-07 2014-06-12 Flex-Elektrowerkzeuge Gmbh Hand held grinding machine
DE102012111987A1 (en) * 2012-12-07 2014-06-12 Flex-Elektrowerkzeuge Gmbh Hand held grinding machine
CN104416550A (en) * 2013-08-27 2015-03-18 天佑电器（苏州）有限公司 Handle component and gardening tool with same
DE202015000409U1 (en) * 2015-01-22 2015-03-16 Elektrowerkzeuge Gmbh Eibenstock Device for extracting grinding dust on rotary grinders
EP3208039A1 (en) * 2016-02-17 2017-08-23 HILTI Aktiengesellschaft Angle grinder dust hood
EP3208040A1 (en) * 2016-02-17 2017-08-23 HILTI Aktiengesellschaft Angle grinder dust hood
DE102018206869A1 (en) * 2018-05-04 2019-11-07 Robert Bosch Gmbh Easy to mount dust extraction

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585980A (en) * 1964-09-03 1971-06-22 Fred Mellor Method and device for removing mortar or the like from between superimposed rows of bricks or the like
DE4230642A1 (en) * 1992-09-12 1994-03-17 Bosch Gmbh Robert Powered circular hand-saw with dust extraction system - has pendulum guard with resilient guide vanes which touch each side of saw blade and deflect sawdust towards suction aperture

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533668A1 (en) * 1985-09-20 1987-03-26 Fabritius Hans Josef Dust-extraction device for grinding machines with a rotating grinding plate
EP0215476B1 (en) * 1985-09-20 1990-04-04 Festo KG Rotary grinder with dust extraction-device
DE4238564C2 (en) * 1992-11-14 1995-02-23 Fein C & E Power tool
WO1997032692A1 (en) 1996-03-06 1997-09-12 Ulrich Wagner Protection and suction hood sealingly set on a hand grinding and polishing machine
BE1011027A6 (en) * 1997-02-21 1999-04-06 Carbodiam Abrasive grinding tool and method of design tool.
US5791979A (en) * 1997-03-17 1998-08-11 Duncan; C. Warren Grinding vacuum shroud
FR2882949B3 (en) * 2005-03-14 2007-02-02 M B H Dev Sarl SANDING SANDER, ASPIRING OR NOT

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585980A (en) * 1964-09-03 1971-06-22 Fred Mellor Method and device for removing mortar or the like from between superimposed rows of bricks or the like
DE4230642A1 (en) * 1992-09-12 1994-03-17 Bosch Gmbh Robert Powered circular hand-saw with dust extraction system - has pendulum guard with resilient guide vanes which touch each side of saw blade and deflect sawdust towards suction aperture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101390936B1 (en) 2012-07-13 2014-05-02 삼성중공업 주식회사 grinder unit
US9289879B2 (en) 2013-05-02 2016-03-22 Black & Decker Inc. Hinge assembly for an angle grinder dust shroud

Also Published As

Publication number Publication date
EP2163356A2 (en) 2010-03-17
EP2163356A3 (en) 2010-09-22
ATE531487T1 (en) 2011-11-15
PL2163356T3 (en) 2012-03-30
DE102008046947A1 (en) 2010-03-18

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