WO1999061131A1 - Device for detachably connecting a hollow cylindrical filter element to a filtering device - Google Patents

Device for detachably connecting a hollow cylindrical filter element to a filtering device Download PDF

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Publication number
WO1999061131A1
WO1999061131A1 PCT/EP1999/001751 EP9901751W WO9961131A1 WO 1999061131 A1 WO1999061131 A1 WO 1999061131A1 EP 9901751 W EP9901751 W EP 9901751W WO 9961131 A1 WO9961131 A1 WO 9961131A1
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WO
WIPO (PCT)
Prior art keywords
flange part
filter element
recess
spring
filter
Prior art date
Application number
PCT/EP1999/001751
Other languages
German (de)
French (fr)
Inventor
Harald Mees
Original Assignee
Hydac Filtertechnik Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hydac Filtertechnik Gmbh filed Critical Hydac Filtertechnik Gmbh
Publication of WO1999061131A1 publication Critical patent/WO1999061131A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/147—Bypass or safety valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/16—Valves
    • B01D2201/162—Valves with snap, latch or clip connecting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/30—Filter housing constructions
    • B01D2201/301—Details of removable closures, lids, caps, filter heads
    • B01D2201/305—Snap, latch or clip connecting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4084—Snap or Seeger ring connecting means

Definitions

  • the invention relates to a device for releasably connecting a hollow cylindrical filter element to a filter device which has a flange part serving as a filter receptacle, on the annular surface of which the edge of an end opening of the filter element can be pressed by means of a clamping device with mutual sealing, the clamps provided on the flange part with has resilient legs which can be locked with at least one locking element formed on the filter element.
  • a device of this type is already known, compare WO 97/37743.
  • the brackets of the clamping device are formed in this device by resilient locking projections which are integrally formed on the flange part.
  • This design of the flange part which is produced by press molding from plastic, leads to high costs for the required molding tools, which in turn results in high manufacturing costs of the device.
  • the invention has for its object to provide a device of the type under consideration, which is characterized by a particularly simple structure of the clamping device and consequently low manufacturing costs.
  • this object is achieved according to the invention in that the tensioning device has a plurality of spring clips designed as separate components, which are arranged distributed around the circumference of the flange part.
  • the spring clips can be anchored to the flange part of the device which forms the filter receptacle, preferably by means of a recess which is incorporated into the latter and which is open on the side of the flange part facing away from the annular surface, so that the spring clip in question is in the recess in each case with an anchoring part bent laterally from the leg region can be attached.
  • the spring clips for forming their anchoring part are bent at the end to form an eyelet which extends laterally away from the spring leg and can be received in the recess of the flange part.
  • the arrangement can be such that the eyelet is non-circular and that the recess of the flange part to prevent a pivoting movement of the eyelet received in it has a non-circular cross section adapted to this.
  • the spring leg can be deflected from its normal position against the inherent elasticity.
  • the shape of the spring clips can be chosen so that a locking lug designed as an offset on the spring leg is in the normal position out of engagement with the locking element on the filter element located.
  • the spring clips are biased into a standby position in which they do not hinder the application of a filter element to the filter holder of the device, after which the spring clips can be moved into the latching position with slight elastic deformation of the spring leg, in which the latching lug latches with the latching element on the filter element is.
  • a radially projecting rib which is formed on the circumference of the filter element and which is shaped such that it can be gripped behind by the cranked latching lug of the spring clips can be provided as the latching element.
  • Fig. 1 shows a longitudinal section of the upper part of a filter element connected to the filter head of a filter device
  • FIG. 2 and 3 compared to FIG. 1 on a larger scale and broken partial longitudinal sections of the radially outer connection area between the filter element and filter head, an embodiment of the seat for a sealing element which is modified compared to FIG. 1 being shown on the filter element.
  • the reference number 1 denotes a filter head of a filter device for hydraulic fluid.
  • the filter head 1 is surrounded on its circumference by an annular flange part 3, which forms a receptacle for a hollow cylinder-like filter element, designated as a whole by 5, which can be pressed with the edge of its opening at the end facing the filter head 1 against a facing annular surface 7 of the flange part 3 is.
  • the inside of the filter element 5 extending part of the filter head 1 forms a valve housing 9 for a bypass valve of known construction, designated as a whole by 1 1, compare DE 195 46 440 A1.
  • the bypass valve 11 normally prevents uncleaned fluid from the top 13 from entering the interior of the filter element 5, but opens at a predetermined pressure difference in order to allow unfiltered fluid to enter the interior of the filter element 5, at the bottom of which a filter shown in FIG. 1 not shown outlet for cleaned fluid is provided. Normally (when the bypass valve 11 is closed), the unfiltered fluid enters the inner cavity of the filter element 5 from the outside of the filter element 5 through its filter mat 15.
  • the filter housing 9 of the bypass valve 1 1 is made as an injection molded part from a plastic material which has a certain elasticity and, for fixing the flange part 3, has molded-on lugs 17 with end hook parts 19 which engage behind shoulder surfaces on the flange part 3.
  • An O-ring 21 serves to seal between the filter head 1 and the flange part 3.
  • the filter element 5 has, in a manner known per se, as a support for the filter mat 1 5, an inner support tube 23 with openings which allow the passage of the cleaned fluid into the interior of the filter element 5.
  • the support tube 23 is supported by means of a support ring 25.
  • the filter mat 15 is glued via an annular intermediate piece 27 to an element receptacle 29, which forms an annular cap which overlaps the intermediate piece 27 and the adjacent edge region of the filter mat 15, which is made of plastic as an injection molded part and the opening at the end of the filter element 5 defined.
  • the element receptacle 29 can be placed with its annular end face 31 on the ring face 7 of the flange part 3, an O-ring 33 being provided as a sealing element for sealing.
  • the element receptacle 29 has on its outside, namely at the end facing away from the end face 31, a circumferential, radially projecting rib 35 which forms a projection with an inner arch 37 which can be gripped behind by a locking lug 39 which acts as a side offset on Leg of spring clips designated as a whole with 41 can be reached behind.
  • the spring leg of the spring clips 41 is extended beyond the cranked detent 39 to form a handle 43.
  • the spring clips 41 can be formed from a sheet steel strip of approximately 0.4-0.5 mm in thickness and approximately 10 mm in width.
  • Each spring clip 41 has in the end region facing away from the grip piece 43 as an anchoring part an eyelet 45 bent from the spring leg to the side, with which the spring clip 41 can be suspended in a recess 47 of the flange part 3.
  • a separate recess 47 is preferably provided for each spring clip 41, which are diametrically opposed to one another in pairs in the case of exemplary embodiments with four spring clips 41.
  • an uninterrupted annular groove in the flange part 3 could serve as a common recess for hanging the spring clips 41.
  • the eyelet 45 of the spring clips 41 is non-circular in adaptation to the rectangular shape of the recess 47.
  • the eyelet 45 is open at the end to form an exposed edge 49.
  • this end edge 49 of the eyelet 45 falls behind a shoulder 51 forming a stop at the opening of the recess 47 in order to secure the spring clip 41 in the recess 47.
  • the non-circular shape of the eyelet 45 also prevents a pivoting movement of the anchoring part of the spring clip 41 within the recess 47. According to the shape of the spring leg of the spring clips 41, a normal position can thereby be defined, which is shown in FIG.
  • the latching can be brought about by pressing the latching lug 39 into the arch 37 of the rib 35 with slight elastic deformation of the spring leg, whereby the shape and dimension of the spring clips 41 ensure that the latching takes place with pretension, ie the end face 31 of the element receptacle 29 with sufficient pressing force is pressed against the annular surface 7 of the flange part 3 in order to ensure the required sealing by means of the inserted O-ring 33.
  • the O-ring 33 is received in the element receptacle 29 in an annular groove 53, the width of which, measured in the radial direction, is greater than the diameter of the cross section of the O-ring 33, so that under the contact pressure A certain flattening of the O-ring 33 can take place between the annular surface 7 and the annular surface 52 forming the bottom of the annular groove 53, thereby ensuring that a perfect seal is achieved when the surfaces 7 and 31 are flush.
  • the annular groove receiving the O-ring 33 is open towards the outer circumference of the element holder 39, so that the O-ring 33 can also be expanded in the radial direction.

Abstract

The invention relates to a device for detachably connecting a hollow cylindrical filter element (5) to a filtering device having a flange part (3) serving as filter support. The filter element (5) can be pressed against the annular surface (7) of said flange part, both of which are mutually sealed by means of a clamping device. The clamping device has several unilaterally fixed spring clips (41) distributed along the periphery of the flange part (3), the free spring limbs of which can be locked on at least one locking element (35, 37) embodied in the filter element (5).

Description

Vorrichtung zum lösbaren Verbinden eines hohlzylinderartigen Filterelementes mit einer Filtervorrichtung Device for releasably connecting a hollow cylindrical filter element to a filter device
Die Erfindung bezieht sich auf eine Vorrichtung zum lösbaren Verbinden eines hohlzylinderartigen Filterelementes mit einer Filtervorrichtung, die einen als Filteraufnahme dienenden Flanschteil aufweist, an dessen Ringfläche der Rand einer endseitigen Öffnung des Filterelementes unter gegenseitiger Abdichtung mittels einer Spanneinrichtung andrückbar ist, die am Flanschteil vorgesehene Klammern mit nachgiebigen Schenkeln aufweist, die mit zumindest einem am Filterelement ausgebildeten Rastelement verrastbar sind.The invention relates to a device for releasably connecting a hollow cylindrical filter element to a filter device which has a flange part serving as a filter receptacle, on the annular surface of which the edge of an end opening of the filter element can be pressed by means of a clamping device with mutual sealing, the clamps provided on the flange part with has resilient legs which can be locked with at least one locking element formed on the filter element.
Eine Vorrichtung dieser Art ist bereits bekannt, vergleiche WO 97/37743. Die Klammern der Spanneinrichtung sind bei dieser Vorrichtung durch nachgiebige Rastvorsprünge gebildet, die einstückig am Flanschteil angeformt sind. Diese Gestaltung des Flanschteiles, das durch Preßformen aus Kunststoff hergestellt wird, führt zu hohen Kosten für die erforderlichen Formwerkzeuge, was wiederum hohe Herstellungskosten der Vorrichtung zur Folge hat.A device of this type is already known, compare WO 97/37743. The brackets of the clamping device are formed in this device by resilient locking projections which are integrally formed on the flange part. This design of the flange part, which is produced by press molding from plastic, leads to high costs for the required molding tools, which in turn results in high manufacturing costs of the device.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der in Betracht stehenden Art zu schaffen, die sich demgegenüber durch einen besonders einfachen Aufbau der Spanneinrichtung und demzufolge niedrige Herstellungskosten auszeichnet. Bei einer Vorrichtung der eingangs genannten Art ist diese Aufgabe erfindungsgemäß dadurch gelöst, daß die Spanneinrichtung mehrere, als gesonderte Bauteile ausgebildete Federklammern aufweist, die am Umfang des Flanschteiles verteilt angeordnet sind.The invention has for its object to provide a device of the type under consideration, which is characterized by a particularly simple structure of the clamping device and consequently low manufacturing costs. In a device of the type mentioned, this object is achieved according to the invention in that the tensioning device has a plurality of spring clips designed as separate components, which are arranged distributed around the circumference of the flange part.
Die erfindungsgemäß vorgesehene Verwendung gesonderter Federklammern als der Filteraufnahme zugeordneter Teil der Spanneinrichtung ermöglicht eine vereinfachte Formgestaltung des Flanschteiles und dadurch eine Verringerung der aufzuwendenden Werkzeugkosten, so daß in erstrebter Weise geringe Herstellungskosten für die Vorrichtung anfallen.The use according to the invention of separate spring clips as the part of the tensioning device assigned to the filter receptacle enables a simplified design of the flange part and thereby a reduction in the tool costs to be used, so that low manufacturing costs for the device are incurred.
Die Verankerung der Federklammern kann an dem die Filteraufnahme bildenden Flanschteil der Vorrichtung vorzugsweise mittels einer in diesen eingearbeiteten Ausnehmung erfolgen, die auf der der Ringfläche abgekehrten Seite des Flanschteiles offen ist, so daß die betreffende Federklammer mit einem vom Schenkelbereich seitlich abgebogenen Verankerungsteil jeweils in die Ausnehmung einhängbar ist.The spring clips can be anchored to the flange part of the device which forms the filter receptacle, preferably by means of a recess which is incorporated into the latter and which is open on the side of the flange part facing away from the annular surface, so that the spring clip in question is in the recess in each case with an anchoring part bent laterally from the leg region can be attached.
Bei einem vorteilhaften Ausführungsbeispiel sind die Federklammern zur Bildung ihres Verankerungsteiles endseitig zu einer sich seitlich vom Federschenkel weg erstreckenden Öse gebogen, die in der Ausnehmung des Flanschteiles aufnehmbar ist. Dabei kann die Anordnung so getroffen sein, daß die Öse unrund ausgebildet ist und daß die Ausnehmung des Flanschteiles zur Verhinderung einer Schwenkbewegung der in ihr aufgenommenen Öse einen dieser angepaßten, unrunden lichten Querschnitt besitzt. Bei solcher Ausbildung ist der Federschenkel aus seiner Normalstellung gegen die ihm innewohnende Elastizitäts kraft auslenkbar. Die Formgebung der Federklammern kann so gewählt sein, daß sich eine als Abkröpfung am Federschenkel ausgebildete Rastnase in der Normalstellung außer Eingriff mit dem Rastelement am Filterelement befindet. Dadurch sind die Federklammern in eine Bereitschaftsstellung vorgespannt, in der sie das Anlegen eines Filterelementes an die Filteraufnahme der Vorrichtung nicht behindern, wonach die Federklammern unter leichter elastischer Verformung des Federschenkels in die Verrastungsstellung bewegt werden können, in der die Rastnase mit dem Rastelement am Filterelement verrastet ist.In an advantageous embodiment, the spring clips for forming their anchoring part are bent at the end to form an eyelet which extends laterally away from the spring leg and can be received in the recess of the flange part. The arrangement can be such that the eyelet is non-circular and that the recess of the flange part to prevent a pivoting movement of the eyelet received in it has a non-circular cross section adapted to this. With such a design, the spring leg can be deflected from its normal position against the inherent elasticity. The shape of the spring clips can be chosen so that a locking lug designed as an offset on the spring leg is in the normal position out of engagement with the locking element on the filter element located. As a result, the spring clips are biased into a standby position in which they do not hinder the application of a filter element to the filter holder of the device, after which the spring clips can be moved into the latching position with slight elastic deformation of the spring leg, in which the latching lug latches with the latching element on the filter element is.
Als Rastelement kann eine am Umfang des Filterelementes ausgebildete, radial vorspringende Rippe vorgesehen sein, die so geformt ist, daß sie von der abgekröpften Rastnase der Federklammern hintergreifbar ist.A radially projecting rib which is formed on the circumference of the filter element and which is shaped such that it can be gripped behind by the cranked latching lug of the spring clips can be provided as the latching element.
Nachstehend ist die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen im einzelnen erläutert. Es zeigen:The invention is explained in detail below on the basis of exemplary embodiments illustrated in the drawing. Show it:
Fig. 1 einen Längsschnitt des oberen Teiles eines mit dem Filterkopf einer Filtervorrichtung verbundenen Filterelementes undFig. 1 shows a longitudinal section of the upper part of a filter element connected to the filter head of a filter device and
Fig. 2 und 3 gegenüber Fig. 1 in größerem Maßstab und abgebrochen gezeichnete Teillängsschnitte des radial außenliegenden Verbindungsbereiches zwischen Filterelement und Filterkopf, wobei am Filterelement eine gegenüber Fig. 1 abgewandelte Ausführungsform des Sitzes für ein Dichtelement gezeigt ist.2 and 3 compared to FIG. 1 on a larger scale and broken partial longitudinal sections of the radially outer connection area between the filter element and filter head, an embodiment of the seat for a sealing element which is modified compared to FIG. 1 being shown on the filter element.
In Fig. 1 ist mit der Bezugszahl 1 ein Filterkopf einer Filtervorrichtung für Hydraulikflüssigkeit bezeichnet. Der Filterkopf 1 ist an seinem Umfang von einem ringförmigen Flanschteil 3 umgeben, der eine Aufnahme für ein als Ganzes mit 5 bezeichnetes, hohizylinderartiges Filterelement bildet, das mit dem Rand seiner dem Filterkopf 1 zugewandten, endseitigen Öffnung an eine zugekehrte Ringfläche 7 des Flanschteiles 3 andrückbar ist. Der sich ins Innere des Filterelementes 5 erstreckende Teil des Filterkopfes 1 bildet ein Ventilgehäuse 9 für ein als Ganzes mit 1 1 bezeichnetes Bypassventil bekannter Bauweise, vergleiche DE 195 46 440 A1 . Das Bypassventil 1 1 verhindert normalerweise einen von der Oberseite 1 3 her erfolgenden Zutritt ungereinigten Fluides ins Innere des Filterelementes 5 hinein, öffnet jedoch bei einer vorbestimmten Druckdifferenz, um ungefiltertes Fluid ins Innere des Filterelementes 5 gelangen zu lassen, an dessen Boden ein in Fig. 1 nicht gezeigter Auslaß für gereinigtes Fluid vorgesehen ist. Normalerweise (bei geschlossenem Bypassventil 1 1 ) tritt das ungefilterte Fluid von der Außenseite des Filterelementes 5 durch dessen Filtermatte 1 5 hindurch in den inneren Hohlraum des Filterelementes 5 ein.In Fig. 1, the reference number 1 denotes a filter head of a filter device for hydraulic fluid. The filter head 1 is surrounded on its circumference by an annular flange part 3, which forms a receptacle for a hollow cylinder-like filter element, designated as a whole by 5, which can be pressed with the edge of its opening at the end facing the filter head 1 against a facing annular surface 7 of the flange part 3 is. The inside of the filter element 5 extending part of the filter head 1 forms a valve housing 9 for a bypass valve of known construction, designated as a whole by 1 1, compare DE 195 46 440 A1. The bypass valve 11 normally prevents uncleaned fluid from the top 13 from entering the interior of the filter element 5, but opens at a predetermined pressure difference in order to allow unfiltered fluid to enter the interior of the filter element 5, at the bottom of which a filter shown in FIG. 1 not shown outlet for cleaned fluid is provided. Normally (when the bypass valve 11 is closed), the unfiltered fluid enters the inner cavity of the filter element 5 from the outside of the filter element 5 through its filter mat 15.
Das Filtergehäuse 9 des Bypassventiles 1 1 ist als Spritzgußteil aus einem eine gewisse Elastizität aufweisenden Kunststoffwerkstoff gefertigt und weist zur Fixierung des Flanschteiles 3 angeformte Ansätze 1 7 mit endseitigen Hakenteilen 19 auf, die Schulterflächen am Flanschteil 3 hintergreifen. Zur Abdichtung zwischen Filterkopf 1 und Flanschteil 3 dient ein O-Ring 21 .The filter housing 9 of the bypass valve 1 1 is made as an injection molded part from a plastic material which has a certain elasticity and, for fixing the flange part 3, has molded-on lugs 17 with end hook parts 19 which engage behind shoulder surfaces on the flange part 3. An O-ring 21 serves to seal between the filter head 1 and the flange part 3.
Das Filterelement 5 weist in an sich bekannter Weise als Abstützung für die Filtermatte 1 5 ein inneres Stützrohr 23 mit den Durchtritt des gereinigten Fluides ins Innere des Filterelementes 5 ermöglichenden Durchbrüchen auf. Im Bereich der endseitigen Öffnung des Filterelementes 5 ist das Stützrohr 23 mittels eines Tragringes 25 abgestützt. Am dem Filterkopf 1 zugewandten Ende ist die Filtermatte 1 5 über ein ringförmiges Zwischenstück 27 mit einer Elementaufnahme 29 verklebt, die eine das Zwischenstück 27 und den benachbarten Randbereich der Filtermatte 15 übergreifende ringförmige Kappe bildet, die als Spritzgußteil aus Kunststoff gefertigt ist und die endseitige Öffnung des Filterelementes 5 definiert. Die Elementaufnahme 29 ist mit ihrer ringförmigen Stirnfläche 31 an die Ringfläche 7 des Flanschteiles 3 anlegbar, wobei als Dichtelement zur Abdichtung ein O-Ring 33 vorgesehen ist. Die Elementaufnahme 29 weist an ihrer Außenseite, und zwar am von der Stirnfläche 31 abgekehrten Ende, eine umlaufende, radial vorspringende Rippe 35 auf, die einen Vorsprung mit einer inneren Einwölbung 37 bildet, die von einer Rastnase 39 hintergreifbar ist, die als seitliche Abkröpfung am Schenkel von als Ganzes mit 41 bezeichneten Federklammern hintergreifbar ist. Wie insbesondere aus Fig. 2 und 3 zu ersehen ist, ist der Federschenkel der Federklammern 41 über die abgekröpfte Rastnase 39 hinaus zur Bildung eines Griffstückes 43 verlängert.The filter element 5 has, in a manner known per se, as a support for the filter mat 1 5, an inner support tube 23 with openings which allow the passage of the cleaned fluid into the interior of the filter element 5. In the area of the end opening of the filter element 5, the support tube 23 is supported by means of a support ring 25. At the end facing the filter head 1, the filter mat 15 is glued via an annular intermediate piece 27 to an element receptacle 29, which forms an annular cap which overlaps the intermediate piece 27 and the adjacent edge region of the filter mat 15, which is made of plastic as an injection molded part and the opening at the end of the filter element 5 defined. The element receptacle 29 can be placed with its annular end face 31 on the ring face 7 of the flange part 3, an O-ring 33 being provided as a sealing element for sealing. The element receptacle 29 has on its outside, namely at the end facing away from the end face 31, a circumferential, radially projecting rib 35 which forms a projection with an inner arch 37 which can be gripped behind by a locking lug 39 which acts as a side offset on Leg of spring clips designated as a whole with 41 can be reached behind. As can be seen in particular from FIGS. 2 and 3, the spring leg of the spring clips 41 is extended beyond the cranked detent 39 to form a handle 43.
Die Federklammern 41 können bei einem praktischen Ausführungsbeispiel, bei dem der Außendurchmesser des Filterelementes 5 in der Größenordnung von 1 50 mm liegt, aus einem Stahlblechstreifen von etwa 0,4 - 0,5 mm Stärke und einer Breite von etwa 10 mm geformt sein.In a practical exemplary embodiment, in which the outer diameter of the filter element 5 is in the order of 150 mm, the spring clips 41 can be formed from a sheet steel strip of approximately 0.4-0.5 mm in thickness and approximately 10 mm in width.
Jede Federklammer 41 weist in dem vom Griffstück 43 abgewandten Endbereich als Verankerungsteil eine vom Federschenkel zur Seite hin abgebogene Öse 45 auf, mit der die Federklammer 41 in eine Ausnehmung 47 des Flanschteiles 3 einhängbar ist. Vorzugsweise ist für jede Federklammer 41 eine eigene Ausnehmung 47 vorgesehen, die bei Ausführungsbeispielen mit vier Federklammern 41 paarweise einander diametral gegenüberliegen. Alternativ könnte eine ununterbrochene Ringnut im Flanschteil 3 als gemeinsame Ausnehmung für das Einhängen der Federklammern 41 dienen.Each spring clip 41 has in the end region facing away from the grip piece 43 as an anchoring part an eyelet 45 bent from the spring leg to the side, with which the spring clip 41 can be suspended in a recess 47 of the flange part 3. A separate recess 47 is preferably provided for each spring clip 41, which are diametrically opposed to one another in pairs in the case of exemplary embodiments with four spring clips 41. Alternatively, an uninterrupted annular groove in the flange part 3 could serve as a common recess for hanging the spring clips 41.
Wie am besten aus Fig. 2 und 3 zu ersehen ist, ist die Öse 45 der Federklammern 41 in Anpassung an die Rechteckform der Ausnehmung 47 unrund ausgebildet. Zudem ist die Öse 45 endseitig zur Bildung einer freiliegenden Kante 49 offen. Beim Einsetzen der Öse 45 in die Ausnehmung 47 fällt diese endseitige Kante 49 der Öse 45 hinter einem einen Anschlag bildenden Absatz 51 an der Öffnung der Ausnehmung 47 ein, um die Federklammer 41 in der Ausnehmung 47 zu sichern. Die unrunde Formgebung der Öse 45 verhindert außerdem eine Schwenkbewegung des Verankerungsteiles der Federklammer 41 innerhalb der Ausnehmung 47. Entsprechend der Formgebung des Federschenkels der Federklammern 41 läßt sich dadurch eine Normalstellung definieren, die in Fig. 3 dargestellt ist und in der sich die Rastnase 39 außer Eingriff mit der als Rastelement am Filterelement 5 vorgesehen Rippe 35 befindet. Durch Eindrücken der Rastnase 39 unter leichter elastischer Verformung des Federschenkels in die Einwölbung 37 der Rippe 35 läßt sich die Verrastung herbeiführen, wobei durch Formgebung und Abmessung der Federklammern 41 sichergestellt ist, daß die Verrastung mit Vorspannung erfolgt, d.h. die Stirnfläche 31 der Elementaufnahme 29 mit ausreichender Andrückkraft gegen die Ringfläche 7 des Flanschteiles 3 angedrückt wird, um mittels des eingefügten O-Ringes 33 die erforderliche Abdichtung zu gewährleisten.As can best be seen from FIGS. 2 and 3, the eyelet 45 of the spring clips 41 is non-circular in adaptation to the rectangular shape of the recess 47. In addition, the eyelet 45 is open at the end to form an exposed edge 49. When the eyelet 45 is inserted into the recess 47, this end edge 49 of the eyelet 45 falls behind a shoulder 51 forming a stop at the opening of the recess 47 in order to secure the spring clip 41 in the recess 47. The non-circular shape of the eyelet 45 also prevents a pivoting movement of the anchoring part of the spring clip 41 within the recess 47. According to the shape of the spring leg of the spring clips 41, a normal position can thereby be defined, which is shown in FIG. 3 and in which the locking lug 39 is excepted Engagement with the rib 35 provided as a locking element on the filter element 5 is located. The latching can be brought about by pressing the latching lug 39 into the arch 37 of the rib 35 with slight elastic deformation of the spring leg, whereby the shape and dimension of the spring clips 41 ensure that the latching takes place with pretension, ie the end face 31 of the element receptacle 29 with sufficient pressing force is pressed against the annular surface 7 of the flange part 3 in order to ensure the required sealing by means of the inserted O-ring 33.
Wie aus Fig. 2 und 3 zu ersehen ist, ist der O-Ring 33 in der Elementaufnahme 29 in einer Ringnut 53 aufgenommen, deren Breite in Radialrichtung gemessen größer ist als der Durchmesser des Querschnitts des O-Ringes 33, so daß unter dem Anpreßdruck zwischen Ringfläche 7 und der den Boden der Ringnut 53 bildenden Ringfläche 52 ein gewisses Flachdrücken des O-Ringes 33 stattfinden kann, wodurch sichergestellt ist, daß bei bündigem Anliegen der Flächen 7 und 31 eine einwandfreie Abdichtung zustande kommt. Bei dem in Fig. 1 gezeigten Beispiel ist die den O-Ring 33 aufnehmende Ringnut zum äußeren Umfang der Elementaufnahme 39 hin offen, so daß ebenfalls ein Ausbreiten des O-Ringes 33 in Radialrichtung erfolgen kann. As can be seen from FIGS. 2 and 3, the O-ring 33 is received in the element receptacle 29 in an annular groove 53, the width of which, measured in the radial direction, is greater than the diameter of the cross section of the O-ring 33, so that under the contact pressure A certain flattening of the O-ring 33 can take place between the annular surface 7 and the annular surface 52 forming the bottom of the annular groove 53, thereby ensuring that a perfect seal is achieved when the surfaces 7 and 31 are flush. In the example shown in FIG. 1, the annular groove receiving the O-ring 33 is open towards the outer circumference of the element holder 39, so that the O-ring 33 can also be expanded in the radial direction.

Claims

P a t e n t a n s p r ü c h e Patent claims
1 . Vorrichtung zum lösbaren Verbinden eines hohlzylinderartigen Filterelementes (5) mit einer Filtervorrichtung, die einen als Filteraufnahme dienenden Flanschteil (3) aufweist, an dessen Ringfläche (7) der Rand einer endseitigen Öffnung des Filterelementes (5) unter gegenseitiger Abdichtung mittels einer Spanneinrichtung andrückbar ist, die am Flanschteil (3) vorgesehene Klammern (41 ) mit nachgiebigen Schenkeln aufweist, die mit zumindest einem am Filterelement (5) ausgebildeten Rastelement (35, 37) verrastbar sind, dadurch gekennzeichnet, daß die Spanneinrichtung mehrere, als gesonderte Bauteile ausgebildete Federklammern (41 ) aufweist, die am Umfang des Flanschteiles (3) verteilt angeordnet sind.1 . Device for the detachable connection of a hollow cylindrical filter element (5) to a filter device which has a flange part (3) serving as a filter receptacle, on the annular surface (7) of which the edge of an opening at the end of the filter element (5) can be pressed by means of a clamping device, with mutual sealing, the clamps (41) provided on the flange part (3) with resilient legs, which can be locked with at least one locking element (35, 37) formed on the filter element (5), characterized in that the tensioning device has a plurality of spring clips (41 ) which are arranged distributed around the circumference of the flange part (3).
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß vier je paarweise einander diametral gegenüberliegende Federklammern (41 ) vorgesehen sind.2. Device according to claim 1, characterized in that four pairs of diametrically opposite spring clips (41) are provided.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß jede Federklammer (41 ) am Flanschteil (3) in einer in diesen eingearbeiteten Ausnehmung (47) verankert ist, die auf der der Ringfläche (7) abgekehrten Seite des Flanschteiles (3) offen ist.3. Apparatus according to claim 2, characterized in that each spring clip (41) on the flange part (3) is anchored in a recess (47) incorporated therein, which is open on the side of the flange part (3) facing away from the annular surface (7) .
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß jede Federklammer (41 ) zur Bildung ihres Verankerungsteiles endseitig zu einer sich seitlich vom Federschenkel weg erstreckenden Öse (45) gebogen ist, die in der Ausnehmung (47) des Flanschteiles (3) aufnehmbar ist. 4. The device according to claim 3, characterized in that each spring clip (41) for forming its anchoring part is bent at the end to a laterally extending away from the spring leg eyelet (45) which can be received in the recess (47) of the flange part (3) .
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die den Verankerungsteil der Federklammer (41 ) bildende Öse (45) unrund ausgebildet ist und daß die Ausnehmung (47) des Flanschteiles (3) zur Verhinderung einer Schwenkbewegung der in ihr aufgenommenen Öse (45) einen dieser angepaßten, unrunden lichten Querschnitt besitzt.5. The device according to claim 4, characterized in that the anchoring part of the spring clip (41) forming eyelet (45) is non-circular and that the recess (47) of the flange part (3) to prevent pivoting movement of the eyelet received in it (45 ) has one of these adapted, non-circular clear cross-section.
6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die an den Federklammern (41 ) vorgesehene Öse (45) zur Bildung einer freiliegenden, endseitigen Kante (49) offen ist und daß die Ausnehmung (47) des Flanschteiles (3) einen von der endseitigen Kante (49) der Öse (45) hintergreifbaren Anschlag (51 ) zur Sicherung der Federklammer (41 ) am Flanschteil (3) aufweist.6. Apparatus according to claim 4 or 5, characterized in that the eyelet (45) provided on the spring clips (41) is open to form an exposed end edge (49) and that the recess (47) of the flange part (3) is one from the end edge (49) of the eyelet (45) engages behind the stop (51) for securing the spring clip (41) on the flange part (3).
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der zur Verrastung mit den Rastelementen (35, 37) des Filterelementes (5) bestimme Abschnitt des Federschenkels der Federklammern (41 ) eine Abkröpfung zur Bildung einer Rastnase (39) besitzt.7. Device according to one of claims 1 to 6, characterized in that for locking with the locking elements (35, 37) of the filter element (5) certain section of the spring leg of the spring clips (41) has an offset to form a locking lug (39) .
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß der Federschenkel der Federklammern (41 ) über die abgekröpfte Rastnase (39) hinaus zur Bildung eines Griffstücks (43) verlängert ist.8. The device according to claim 7, characterized in that the spring leg of the spring clips (41) on the cranked locking lug (39) is extended to form a handle (43).
9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß als Rastelement eine am Umfang des Filterelementes (5) ausgebildete, radial vorspringende Rippe (35, 37) vorgesehen ist. 9. Device according to one of claims 1 to 8, characterized in that a radially projecting rib (35, 37) is provided as a locking element on the circumference of the filter element (5).
10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß ein den Rand der endseitigen Öffnung des Filterelementes (5) umgebendes Dichtelement (33) als Abdichtung gegenüber der Ringfläche (7) des Flanschteiles (3) vorgesehen ist.10. Device according to one of claims 1 to 9, characterized in that an edge of the end opening of the filter element (5) surrounding sealing element (33) is provided as a seal against the annular surface (7) of the flange part (3).
1 1 . Vorrichtung nach den Ansprüchen 9 und 10, dadurch gekennzeichnet, daß das Filterelement (5) eine den Rand seiner endseitigen Öffnung definierende, ringförmige Elementaufnahme (29) aufweist, an deren Umfang die als Rastelement dienende Rippe (35, 37) angeformt ist und die in ihrer zur Anlage an der Ringfläche (7) des Flanschteiles (3) bestimmten Stirnfläche (31 ) eine ringförmige Vertiefung (53) als Sitz für das als O-Ring (33) ausgebildete Dichtelement aufweist.1 1. Device according to claims 9 and 10, characterized in that the filter element (5) has an annular element receptacle (29) defining the edge of its opening at the end, on the circumference of which the rib (35, 37) serving as a locking element is molded and which in its end face (31) intended for bearing against the annular surface (7) of the flange part (3) has an annular recess (53) as a seat for the sealing element designed as an O-ring (33).
12. Vorrichtung nach Anspruch 1 1 , dadurch gekennzeichnet, daß die Vertiefung (53) eine ein radiales Aufweiten des O-Ringes (33) beim Anpressen an die Ringfläche (7) des Flanschteiles (3) ermöglichende lichte Weite besitzt oder zum Umfang der Elementaufnahme (29) hin offen ist. 12. The apparatus according to claim 1 1, characterized in that the recess (53) has a radial expansion of the O-ring (33) when pressed against the annular surface (7) of the flange part (3) enabling clear width or to the extent of the element holder (29) is open.
PCT/EP1999/001751 1998-05-26 1999-03-17 Device for detachably connecting a hollow cylindrical filter element to a filtering device WO1999061131A1 (en)

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DE1998123339 DE19823339A1 (en) 1998-05-26 1998-05-26 Device for releasably connecting a hollow cylindrical filter element to a filter device
DE19823339.6 1998-05-26

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KR100809505B1 (en) * 2001-02-23 2008-03-04 베르너 리트쉬레 게엠베하 앤드 코. 카게 Oil separator for pumps overflowing with oil
CN110925911A (en) * 2019-12-30 2020-03-27 派洛奇科技（广东）有限公司 Air purifying device

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JP4444891B2 (en) 2005-08-23 2010-03-31 トヨタ紡織株式会社 Element exchange type filter
CN105597452B (en) * 2016-01-31 2018-08-07 杭州卡丽智能科技股份有限公司 A kind of air purification filter cylinder and air purifier

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FR771829A (en) * 1934-04-13 1934-10-18 Futs Metalliques Gallay S A Closing device for a metal container
US3101154A (en) * 1960-11-09 1963-08-20 North American Aviation Inc Modular container and retaining means
DE2412051A1 (en) * 1973-03-10 1974-11-07 Gen Motors Ltd AIR FILTER HOUSING MADE OF PLASTIC
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CN110925911A (en) * 2019-12-30 2020-03-27 派洛奇科技（广东）有限公司 Air purifying device

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