EP2172305A1 - Battery-operated angle grinding machine - Google Patents

Battery-operated angle grinding machine Download PDF

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Publication number
EP2172305A1
EP2172305A1 EP09171299A EP09171299A EP2172305A1 EP 2172305 A1 EP2172305 A1 EP 2172305A1 EP 09171299 A EP09171299 A EP 09171299A EP 09171299 A EP09171299 A EP 09171299A EP 2172305 A1 EP2172305 A1 EP 2172305A1
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EP
European Patent Office
Prior art keywords
housing
axis
housing portion
angle
battery
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09171299A
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German (de)
French (fr)
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EP2172305B1 (en
Inventor
Reinhard Riedl
Christian Koschel
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Hilti AG
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Hilti AG
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Publication date
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Publication of EP2172305A1 publication Critical patent/EP2172305A1/en
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Publication of EP2172305B1 publication Critical patent/EP2172305B1/en
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    • 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
    • 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
    • B24B23/028—Angle tools

Definitions

  • the invention relates to a battery-powered angle grinder for driving cutting or grinding wheels.
  • Such angle grinders have a circular disk-shaped separating or grinding tool which rotates during operation and z. B. for generating cuts in substrates or for grinding surfaces.
  • the separating or grinding tool is circumferentially at least partially covered by a protective hood.
  • the machine housing has an elongated, approximately rod-shaped housing part with included electric drive motor and with an end portion on which an end-side connection surface is provided with Einsteckability for interchangeable attachment of a battery pack, which is provided with a connection part, which abuts against the pad one of these having associated contact surface and engaging in the Einsteckability male part.
  • the end part is bent with respect to the housing part from the longitudinal direction out to one side.
  • a disadvantage of this known angle grinder on the one hand, that the housing surrounding the motor serves as a handle, which has a relatively large diameter and is correspondingly bulky to grip. Furthermore, the weight distribution for the user's hand acting on the housing part is unfavorable due to the existing different individual centers of gravity (eg on the accumulator package, on the motor and on the tool) and leads to large moments possibly acting on the wrist of the user.
  • the present invention has for its object to provide an angle grinder that avoids the disadvantages mentioned and is structurally simple.
  • the object is achieved by the measures mentioned in claim 1.
  • the angle grinder has a handle, which is arranged with a first end on the first housing portion and a second end on the other housing portion, whereby an easy to handle and by the angled housing simultaneously short angle grinder is provided.
  • the angle between the axis of the first housing portion and the axis of the further housing portion is in a range between 10 ° and 65 °, whereby both housing sections can be connected via the handle, without contours of the other housing section are perceived by the user as disturbing.
  • the angle grinder has a resultant center of gravity resulting from various center of gravity centers located in the first axis, with a handle portion of the handle being advantageously perpendicular to the resulting center of mass with respect to the first axis. This results in a balanced device in whose operation hardly a moment acts on the wrist of a hand holding the hangriff.
  • FIG. 1 a first inventive grid-independent operable angle grinder 10 is shown, on which a (in the FIG. 1 only indicated) disc-shaped cutting or grinding tool 12 is attachable, which is drivable via a arranged in a housing 11 drive unit.
  • the separating or grinding tool 12 can be fixed to a drive spindle 13, which emerges from the housing 11 on a housing flange 16.
  • a protective hood 17 (only indicated) can be arranged on the housing 11, via which the separating or grinding tool 12 can be at least partially covered.
  • the Housing 11 has, in addition to the housing flange 16, which receives a gear 19 of the drive unit, along with a first axis A1 extending first housing portion 14, which houses a motor 18 of the drive unit, and a along a second axis A2 extending further housing portion 15 a battery holder 25 on.
  • an electrical energy store in the form of a rechargeable battery 30 is detachably received in the battery receptacle 25, wherein the rechargeable battery 30 runs with its longitudinal extent along the second axis A2.
  • the further housing portion 15 is angled away from the first housing portion 14, so that the axes A1 and A2 are at an angle [alpha] to each other, which in the in FIG. 1 represented angle grinder amounts to 15 °.
  • the angle grinder 10 further has a handle 20 which is arranged with a first end 21 on the first housing portion 14 and a second end 22 on the other housing portion 15 and thereby extends in a plane defined by the axes A1 and A2 plane E.
  • the handle 20 is formed bridge-like and extends within a range which is spanned in the gusset between the first housing portion 14 and the further housing portion 15.
  • a handle portion 23 is arranged at which a switch 24 for turning on and off the angle grinder 10 is located.
  • the handle 20 is at least with a handle portion 23 spaced from the housing 11.
  • the grip region 23 is further spaced substantially vertically with its center Z from the first axis A1 and a resulting center of gravity FR of the angle grinder 10 (see dotted line 26 in FIG Fig. 1 ).
  • the resulting center of gravity FR results from the different centers of gravity (F1, F2, F3 ...) angle grinder 10, so in particular from the first center of gravity F1 in the drive spindle 13 with the gear 19 and the cutting or grinding tool 12, the second Center of gravity F2 in the area of the motor 18 and the third center of gravity F3 in the area of the battery 30 located in the battery holder 30th
  • FIG. 2 a further inventive angle grinder 10 is shown, which differs in particular from the previously described that the further housing portion 15 is made steeper with the battery holder 25 and the battery 30 relative to the first housing portion 14.
  • the second axis A2 of the further housing portion 15 is at an angle of 60 ° to the first axis A1 of the first Housing section 14.

Abstract

The grinder (10) has a housing (11) including first and second housing sections (14, 15) extending along first and second axes (A1, A2), respectively. The axes extend at an angle (alpha) between 10 degrees and 65 degrees to each other. Two ends (21, 22) of a handle (20) are secured to the housing sections, respectively. A motor (18) drives a cutting/grinding tool (12), where the motor is arranged in the first housing section, and an accumulator receptacle (25) is provided in the second housing section.

Description

Die Erfindung betrifft eine akkubetriebene Winkelschleifmaschine zum Antrieb von Trenn- oder Schleifscheiben.The invention relates to a battery-powered angle grinder for driving cutting or grinding wheels.

Derartige Winkelschleifmaschinen, weisen ein kreisscheibenförmiges Trenn- oder Schleifwerkzeug auf, das im Betrieb rotiert und z. B. zum Erzeugen von Schnitten in Untergründen oder zum Schleifen von Oberflächen dient. Das Trenn- oder Schleifwerkzeug wird dabei umfänglich zumindest bereichsweise von einer Schutzhaube abgedeckt.Such angle grinders have a circular disk-shaped separating or grinding tool which rotates during operation and z. B. for generating cuts in substrates or for grinding surfaces. The separating or grinding tool is circumferentially at least partially covered by a protective hood.

Aus der DE 100 39 777 A1 ist ein als Winkelschleifer ausgebildetes batteriegespeistes Elektrowerkzeug bekannt, welches ein längliches Maschinengehäuse aufweist. Das Maschinengehäuse weist einen länglichen, etwa stabförmigen Gehäuseteil mit enthaltenem elektrischen Antriebsmotor und mit einem Endteil auf, an dem eine endseitige Anschlussfläche mit Einsteckaufnahme für die auswechselbare Anbringung eines Akkumulatorpakets vorgesehen ist, das mit einem Anschlussteil versehen ist, der zur Anlage an der Anschlussfläche eine dieser zugeordnete Anlagefläche und einen in die Einsteckaufnahme eingreifenden Einsteckteil aufweist. Der Endteil ist in Bezug auf den Gehäuseteil aus der Längserstreckungsrichtung heraus zu einer Seite hin abgeknickt.From the DE 100 39 777 A1 is designed as an angle grinder battery-powered power tool is known, which has an elongate machine housing. The machine housing has an elongated, approximately rod-shaped housing part with included electric drive motor and with an end portion on which an end-side connection surface is provided with Einsteckaufnahme for interchangeable attachment of a battery pack, which is provided with a connection part, which abuts against the pad one of these having associated contact surface and engaging in the Einsteckaufnahme male part. The end part is bent with respect to the housing part from the longitudinal direction out to one side.

Von Nachteil bei dieser bekannten Winkelschleifmaschine ist zum einen, dass das den Motor umgebende Gehäuse als Handgriff dient, der einen relativ grossen Durchmesser aufweist und entsprechend sperrig zu greifen ist. Ferner ist die Gewichtsverteilung für die am Gehäuseteil angreifende Hand eines Anwenders auf Grund der vorhandenen verschiedenen Einzelschwerpunkte (z. B. am Akkumulatorpaket, am Motor und am Werkzeug) ungünstig und führt zu grossen ggf. auf das Handgelenk des Anwenders wirkenden Momenten.A disadvantage of this known angle grinder, on the one hand, that the housing surrounding the motor serves as a handle, which has a relatively large diameter and is correspondingly bulky to grip. Furthermore, the weight distribution for the user's hand acting on the housing part is unfavorable due to the existing different individual centers of gravity (eg on the accumulator package, on the motor and on the tool) and leads to large moments possibly acting on the wrist of the user.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Winkelschleifmaschine bereitzustellen, die die genannten Nachteile vermeidet und die konstruktiv einfach ausgebildet ist.The present invention has for its object to provide an angle grinder that avoids the disadvantages mentioned and is structurally simple.

Erfindungsgemäss wird die Aufgabe durch die in Anspruch 1 genannten Massnahmen gelöst. Demnach weist die Winkelschleifmaschine einen Handgriff auf, der mit einem ersten Ende am ersten Gehäuseabschnitt und mit einem zweiten Ende am weiteren Gehäuseabschnitt angeordnet ist, wodurch eine leicht handhabbare und durch das abgewinkelte Gehäuse gleichzeitig kurze Winkelschleifmaschine geschaffen wird.According to the invention, the object is achieved by the measures mentioned in claim 1. Accordingly, the angle grinder has a handle, which is arranged with a first end on the first housing portion and a second end on the other housing portion, whereby an easy to handle and by the angled housing simultaneously short angle grinder is provided.

Vorteilhaft liegt der Winkel zwischen der Achse des ersten Gehäuseabschnitts und der Achse des weiteren Gehäuseabschnitts in einem Bereich zwischen 10° und 65°, wodurch beide Gehäuseabschnitte über den Handgriff verbunden werden können, ohne dass Konturen des weiteren Gehäuseabschnitts vom Anwender als störend empfunden werden.Advantageously, the angle between the axis of the first housing portion and the axis of the further housing portion is in a range between 10 ° and 65 °, whereby both housing sections can be connected via the handle, without contours of the other housing section are perceived by the user as disturbing.

Die Winkelschleifmaschine weist einen sich aus verschiedenen Schwerpunktzentren ergebenden resultierenden Massenschwerpunkt auf, der in der ersten Achse liegt, wobei ein Griffbereich des Handgriffs in Bezug auf die erste Achse vorteilhaft senkrecht beabstandet von dem resultierenden Massenschwerpunkt ist. Hierdurch ergibt sich ein ausbalanciertes Gerät, bei dessen Betrieb kaum ein Moment auf das Handgelenk einer den Hangriff haltenden Hand wirkt.The angle grinder has a resultant center of gravity resulting from various center of gravity centers located in the first axis, with a handle portion of the handle being advantageously perpendicular to the resulting center of mass with respect to the first axis. This results in a balanced device in whose operation hardly a moment acts on the wrist of a hand holding the hangriff.

Die Erfindung wird nachstehend anhand mehrerer Ausführungsbeispiele näher erläutert. Es zeigen:

Fig. 1
eine erfindungsgemässe Winkelschleifmaschine in seitlicher Ansicht,
Fig. 2
eine weitere erfindungsgemässe Winkelschleifmaschine in seitlicher Ansicht.
The invention will be explained in more detail below with reference to several embodiments. Show it:
Fig. 1
an inventive angle grinder in a side view,
Fig. 2
another inventive angle grinder in a side view.

Gleiche Bauteile sind in den Figuren und der nachfolgenden Beschreibung mit gleichen Bezugszeichen versehen.The same components are provided in the figures and the following description with the same reference numerals.

In Figur 1 ist eine erste erfindungsgemässe netzunabhängig betreibbare Winkelschleifmaschine 10 dargestellt, an der ein (in der Figur 1 nur angedeutetes) scheibenförmiges Trenn- oder Schleifwerkzeug 12 anbringbar ist, welches über eine in einem Gehäuse 11 angeordnete Antriebseinheit antreibbar ist. Das Trenn- oder Schleifwerkzeug 12 ist dazu an einer Antriebsspindel 13 festlegbar, die an einem Gehäuseflansch 16 aus dem Gehäuse 11 austritt. Für das Trenn- oder Schleifwerkzeug 12 kann ferner eine Schutzhaube 17 (nur angedeutet) an dem Gehäuse 11 angeordnet sein, über die das Trenn- oder Schleifwerkzeug 12 zumindest teilweise abdeckbar ist. Das Gehäuse 11 weist zusätzlich zu dem Gehäuseflansch 16, der ein Getriebe 19 der Antriebseinheit aufnimmt, einen sich entlang einer ersten Achse A1 erstreckenden ersten Gehäuseabschnitt 14, der einen Motor 18 der Antriebseinheit beherbergt, und einen sich entlang einer zweiten Achse A2 erstreckenden weiteren Gehäuseabschnitt 15 mit einer Akkuaufnahme 25 auf. In Figur 1 ist in der Akkuaufnahme 25 ein elektrischer Energiespeicher in Form eines Akkus 30 lösbar aufgenommen, wobei der Akku 30 mit seiner Längserstreckung entlang der zweiten Achse A2 verläuft. Der weitere Gehäuseabschnitt 15 ist von dem ersten Gehäuseabschnitt 14 abgewinkelt, so dass die Achsen A1 und A2 in einem Winkel [alpha] zueinander liegen, der sich bei der in Figur 1 dargestellten Winkelschleifmaschine auf 15° beläuft.In FIG. 1 a first inventive grid-independent operable angle grinder 10 is shown, on which a (in the FIG. 1 only indicated) disc-shaped cutting or grinding tool 12 is attachable, which is drivable via a arranged in a housing 11 drive unit. The separating or grinding tool 12 can be fixed to a drive spindle 13, which emerges from the housing 11 on a housing flange 16. For the separating or grinding tool 12, furthermore, a protective hood 17 (only indicated) can be arranged on the housing 11, via which the separating or grinding tool 12 can be at least partially covered. The Housing 11 has, in addition to the housing flange 16, which receives a gear 19 of the drive unit, along with a first axis A1 extending first housing portion 14, which houses a motor 18 of the drive unit, and a along a second axis A2 extending further housing portion 15 a battery holder 25 on. In FIG. 1 an electrical energy store in the form of a rechargeable battery 30 is detachably received in the battery receptacle 25, wherein the rechargeable battery 30 runs with its longitudinal extent along the second axis A2. The further housing portion 15 is angled away from the first housing portion 14, so that the axes A1 and A2 are at an angle [alpha] to each other, which in the in FIG. 1 represented angle grinder amounts to 15 °.

Die Winkelschleifmaschine 10 weist ferner einen Handgriff 20 auf, der mit einem ersten Ende 21 am ersten Gehäuseabschnitt 14 und mit einem zweiten Ende 22 am weiteren Gehäuseabschnitt 15 angeordnet ist und dabei in einer durch die Achsen A1 und A2 definierten Ebene E verläuft. Der Handgriff 20 ist brückenartig ausgebildet und erstreckt sich innerhalb eines Bereichs, der im Zwickel zwischen dem ersten Gehäuseabschnitt 14 und dem weiteren Gehäuseabschnitt 15 aufgespannt wird.The angle grinder 10 further has a handle 20 which is arranged with a first end 21 on the first housing portion 14 and a second end 22 on the other housing portion 15 and thereby extends in a plane defined by the axes A1 and A2 plane E. The handle 20 is formed bridge-like and extends within a range which is spanned in the gusset between the first housing portion 14 and the further housing portion 15.

An dem Handgriff 20 ist ein Griffbereich 23 angeordnet an dem sich ein Schalter 24 zum Anund Ausschalten der Winkelschleifmaschine 10 befindet. Der Handgriff 20 ist dabei zumindest mit einem Griffbereich 23 vom Gehäuse 11 beabstandet. Der Griffbereich 23 ist ferner mit seinem Zentrum Z im Wesentlichen senkrecht beabstandet von der ersten Achse A1 und einem auf dieser liegenden resultierenden Massenschwerpunkt FR der Winkelschleifmaschine 10 (siehe punktiert angedeutete Linie 26 in Fig. 1). Der resultierende Massenschwerpunkt FR ergibt sich dabei aus den verschiedenen Schwerpunktzentren (F1, F2, F3...) Winkelschleifmaschine 10, so insbesondere aus dem ersten Schwerpunktzentrum F1 im Bereich der Antriebsspindel 13 mit dem Getriebe 19 und dem Trenn- oder Schleifwerkzeug 12, dem zweiten Schwerpunktzentrum F2 im Bereich des Motors 18 und dem dritten Schwerpunktzentrum F3 im Bereich des in der Akkuaufnahme 25 befindlichen Akkus 30.On the handle 20, a handle portion 23 is arranged at which a switch 24 for turning on and off the angle grinder 10 is located. The handle 20 is at least with a handle portion 23 spaced from the housing 11. The grip region 23 is further spaced substantially vertically with its center Z from the first axis A1 and a resulting center of gravity FR of the angle grinder 10 (see dotted line 26 in FIG Fig. 1 ). The resulting center of gravity FR results from the different centers of gravity (F1, F2, F3 ...) angle grinder 10, so in particular from the first center of gravity F1 in the drive spindle 13 with the gear 19 and the cutting or grinding tool 12, the second Center of gravity F2 in the area of the motor 18 and the third center of gravity F3 in the area of the battery 30 located in the battery holder 30th

In Figur 2 ist eine weitere erfindungsgemässe Winkelschleifmaschine 10 dargestellt, die sich insbesondere dadurch von der vorhergehend beschriebenen unterscheidet, dass der weitere Gehäuseabschnitt 15 mit der Akkuaufnahme 25 und dem Akku 30 gegenüber dem ersten Gehäuseabschnitt 14 steiler angestellt ist. So liegt die zweite Achse A2 des weiteren Gehäuseabschnitts 15 in einem Winkel von 60° zur ersten Achse A1 des ersten Gehäuseabschnitts 14. Wegen nachfolgend nicht erwähnter Bauteile und deren Funktion wird vollumfänglich auf die vorhergehende Beschreibung zu Figur 1 Bezug genommen.In FIG. 2 a further inventive angle grinder 10 is shown, which differs in particular from the previously described that the further housing portion 15 is made steeper with the battery holder 25 and the battery 30 relative to the first housing portion 14. Thus, the second axis A2 of the further housing portion 15 is at an angle of 60 ° to the first axis A1 of the first Housing section 14. Because of components not mentioned below and their function is fully to the previous description FIG. 1 Referenced.

Claims (3)

Winkelschleifmaschine zum Betrieb eines Trenn- oder Schleifwerkzeugs (12), mit einem Gehäuse (11), das einen entlang einer ersten Achse (A1) verlaufenden ersten Gehäuseabschnitt (14), in dem ein Motor (18) angeordnet ist, und das einen entlang einer zweiten Achse (A2) verlaufenden weiteren Gehäuseabschnitt (15) mit einer Akkuaufnahme (25) aufweist, wobei die Achsen (A1, A2) in einem Winkel ([alpha]) zueinander verlaufen,
gekennzeichnet durch
einen Handgriff (20) der mit einem ersten Ende (21) am ersten Gehäuseabschnitt (14) und mit einem zweiten Ende (22) am weiteren Gehäuseabschnitt (15) angeordnet ist.Angle grinding machine for operating a separating or grinding tool (12), comprising a housing (11) having a first housing portion (14) extending along a first axis (A1), in which a motor (18) is arranged, and the one along one second axis (A2) extending further housing portion (15) having a battery receptacle (25), wherein the axes (A1, A2) at an angle ([alpha]) to each other,
marked by
a handle (20) having a first end (21) on the first housing portion (14) and a second end (22) on the further housing portion (15) is arranged. Winkelschleifmaschine nach Anspruch 1, dadurch gekennzeichnet, dass der Winkel ([alpha]) zwischen der ersten Achse (A1) und der zweiten Achse (A2) in einem Bereich zwischen 10° und 65° liegt.Angle grinding machine according to claim 1, characterized in that the angle (α) between the first axis (A1) and the second axis (A2) is in a range between 10 ° and 65 °. Winkelschleifmaschine nach Anspruch 1 oder 2, gekennzeichnet durch einen sich aus verschiedenen Schwerpunktzentren (F1, F2, F3) ergebenden resultierenden Massenschwerpunkt (FR), der in der ersten Achse (A1) liegt, wobei ein Griffbereich (23) des Handgriffs (20) in Bezug auf die erste Achse (A1) senkrecht beabstandet von dem resultierenden Massenschwerpunkt (FR) ist.Angle grinding machine according to claim 1 or 2, characterized by a resulting center of gravity (FR) resulting from different center of gravity centers (F1, F2, F3) lying in the first axis (A1), wherein a grip area (23) of the handle (20) in FIG Reference to the first axis (A1) is perpendicularly spaced from the resulting center of mass (FR).
EP09171299.2A 2008-10-03 2009-09-25 Battery-operated angle grinding machine Active EP2172305B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008042601A DE102008042601A1 (en) 2008-10-03 2008-10-03 Battery powered angle grinder

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EP2172305A1 true EP2172305A1 (en) 2010-04-07
EP2172305B1 EP2172305B1 (en) 2014-01-01

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US (1) US8251782B2 (en)
EP (1) EP2172305B1 (en)
JP (1) JP5502418B2 (en)
CN (1) CN101712134A (en)
DE (1) DE102008042601A1 (en)

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DE102012111990A1 (en) * 2012-12-07 2014-06-12 Flex-Elektrowerkzeuge Gmbh Hand held grinding machine
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WO2003047818A1 (en) * 2001-11-30 2003-06-12 Robert Bosch Gmbh Battery-powered manual machine tool
DE20318570U1 (en) * 2003-12-01 2004-04-29 Hess, Markus, Dr. Handle for a hand-held implement
US20070240892A1 (en) * 2005-11-04 2007-10-18 Black & Decker Inc. Cordless outdoor power tool system
US7310879B1 (en) * 2006-07-27 2007-12-25 Robert Bosch Gmbh Cutting attachment having an adjustable foot for rotary hand tools

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WO2015032564A1 (en) * 2013-09-03 2015-03-12 Robert Bosch Gmbh Grinding machine housing device
US10350727B2 (en) 2013-09-03 2019-07-16 Robert Bosch Gmbh Sanding machine housing device
WO2023066717A1 (en) * 2021-10-22 2023-04-27 Robert Bosch Gmbh Housing device for a hand-held power tool, and hand-held power tool having the housing device

Also Published As

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US20100087127A1 (en) 2010-04-08
JP2010089253A (en) 2010-04-22
US8251782B2 (en) 2012-08-28
CN101712134A (en) 2010-05-26
EP2172305B1 (en) 2014-01-01
DE102008042601A1 (en) 2010-04-08
JP5502418B2 (en) 2014-05-28

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