DE102020121822A1 - drain clip, as well as filter element and filtration device - Google Patents

Abstract

A drain clip (40, 140, 240, 340, 440, 540) for arrangement in a filtration device (20, 120, 220, 320, 420, 520) comprising an annular plate segment (52, 152, 252, 352, 452, 552), a pipe segment (57, 557) with a longitudinal axis (300), an opening (44, 144, 244, 344, 444, 544) for passing through an insertion socket (5, 105, 205, 305, 405, 505) of the filtration device (20 , 120, 220, 320, 420, 520) and a sealing body (41, 141, 241, 341, 441, 541), wherein the sealing body (41, 141, 241, 341, 441, 541) on the annular plate segment (52, 152 , 252, 352, 452, 552) or is part of the annular plate segment (52, 152, 252, 352, 452, 552) and wherein the tube segment (57, 557) is located in a cylinder interior (45, 145, 245, 345, 445, 545) of a filter element (1, 101, 201, 301, 401, 501) and wherein the sealing body (41, 141, 241, 341, 441, 541) is movable, in particular resilient, relative to the pipe segment (57, 557). , is arranged, with a toothing at the end of the pipe segment (57, 557). (48, 548) and/or a recess for receiving a toothing in a form-fitting manner, which extends parallel to the longitudinal axis (300) of the tube segment (57, 557); as well as a filter element and a filtration device.

Description

technical field

The present invention relates to a drain clip, as well as a filter element and a filtration device for filtration of a fluid, e.g. B. an oil or a fuel.

State of the art

Oil filter devices are, for example, from WO 2007/028426 A , the US2008169233A , the DE 296 02 330 U1 or the DE 100 26 451 A1 famous. In such systems with the corresponding filter housings, it is often necessary that when screwing on the housing cover z. B. during maintenance a drain opening of a drain channel is released so that the liquid in the receiving space of the housing can drain. For this purpose, filter elements with valves are usually used, see e.g. B. the WO 2007/028426 A , or similar means equipped. These usually require a force so that the drain opening is released.

the WO 2011/070011 A1 discloses a filter element with an end plate on which a blocking element is resiliently arranged via spring arms.

Disclosure of Invention

Proceeding from the above-mentioned prior art, it is now the object of the present invention to provide a filtration device which enables the filter element to be replaced in a simple and uncomplicated manner.

The present invention solves this problem by providing a drain clip with the features of claim 1, as well as by providing a filter element with the features of claim 5 and by providing a filtration device with the features of claim 8.

A drain clip according to the invention is used for arrangement in a filtration device. It prevents or enables, as required, the discharge of a fluid in the receiving space of the filtration device through a discharge channel.

The drain clip comprises a ring plate segment, a tube segment with a longitudinal axis, an opening, for example in a central position in the ring plate segment and in the tube segment for passing through an insertion socket of the filtration device, and a sealing body, the sealing body being arranged on the ring plate segment, preferably at the edge, or part, preferably at the edge Part of the ring plate segment is.

A ring plate segment is a plate-shaped segment with the aforementioned opening in particular in a central position. The annular plate segment can have projections, for example, which protrude from the plate plane of the annular plate segment. The ring plate segment is preferably circular, but it can also be oval, rectangular or the like.

In a first embodiment variant, the annular plate segment itself can be arranged resiliently in relation to the tube segment. In a second embodiment variant, the annular plate segment can be rigidly connected to the tube segment, but have a radial projection on or on which the sealing body is arranged. This radial projection and the sealing body arranged thereon or thereon are arranged resiliently in relation to the tube segment.

The tube segment is provided for fixing, in particular for releasable mechanical fixing, in a cylinder interior of a filter element. For this purpose, it can have latching or clamping means, for example.

The sealing body is arranged so that it can move relative to the pipe segment, in particular in a resilient manner. As a result, when the pipe segment of the drain clip is fixed in place, a restoring force can still be generated when the sealing body is pressed onto the edge boundary of a drain channel.

The sealing body can preferably take up less than 30% of the area, particularly preferably less than 20% of the area of the annular plate segment.

According to the invention, a toothing and/or a recess for receiving a toothing in a form-fitting manner is arranged at the end of the pipe segment, which toothing extends parallel to the longitudinal axis of the pipe segment.

This toothing or recess makes it possible to prevent it from rotating relative to the remaining components of a filter element when it is used in the filter device. By means of the toothing or recess, for example, a toothing of the drain clip with a support tube arranged in the cylinder interior of the filter element can be achieved, as a result of which the anti-twist device can be produced. This enables the filter element to be positioned securely in the housing of a filtration device by screwing it in with a rotary movement. The anti-twist device prevents the drain clip from turning, so that the sealing body can be positioned precisely over a drainage channel located in the housing. The toothing or recess offers a solution to a complex problem when inserting the filter element into the housing.

Just one tooth is sufficient as teeth. However, a plurality of teeth, e.g. B. in an arrangement of a crown, is preferred, since excessive force can also break off a single tooth. With a plurality of teeth, the force exerted during the rotational movement is distributed over several positions, so that teeth are less likely to break off or be deformed.

Analogously, a plurality of recesses for receiving teeth can also be provided. This is easy to understand for a person skilled in the art based on the principle of a mechanical reversal.

The drain clip can advantageously have a projection in the area of the sealing body, which protrudes radially from the contour of the annular plate segment. This projection can interact with a stop arranged in the housing of the filter device and indicate an end position when the filter element is screwed into the housing.

Between the ring plate segment and the tube segment there can be an annular gap that runs around only in certain areas, and the ring plate segment and the tube segment are connected to one another in a connection area outside of the ring gap. This connection area would not exist in the case of a full-circumferential annular gap. With a large number of materials, the annular gap and the connecting area enable a certain resilient displaceability of the annular plate segment and the tube segment in the area in which both segments are separated by the annular gap. The sealing body is arranged in this area so that the spring effect can be utilized.

The annular gap can advantageously be at least 50%, preferably at least 65%, particularly preferably 80% circumferential, so that a good spring effect can be achieved.

For optimal sealing, the sealing body can have a symmetrical, in particular rotationally symmetrical, bowl-shaped collar area, which protrudes in the axial direction relative to the annular plate segment, based on the longitudinal axis of the pipe segment, the collar area having an end face, in particular an annular end face, for sealing an opening at the edge an outflow channel of the filtration device. This ensures that no fluid can escape through the drain channel.

The tooth or teeth can taper flat along the longitudinal axis, ie towards their end. This enables the drainage clip to be introduced better into the cylinder interior of the filter element.

The filter device described in the context of the present invention can be used in particular as an oil filter device, e.g. in a vehicle, and the fluid can thus be oil. The drain channel serves to drain unfiltered oil when the drain clip is removed, possibly together with the removal of a filter element from the housing of a filter device, e.g. B. during normal maintenance and / or repair work on a vehicle.

The drain clip has an end area. This has connection means for inserting and purely mechanical, ie for positive and / or non-positive connection with the cylinder interior of a filter element. This is preferably a detachable connection, so that when the filter element is replaced, the drain clip can also be used or reused in combination with a new filter element.

The sealing body can preferably consist of a more elastic material than the annular plate segment and/or the tube segment. The material of the sealing body can be an elastomer, for example. The material of the annular plate segment and/or the tube segment can be a plastic, in particular a thermoplastic, or a metal, preferably a sheet metal, in particular a spring steel sheet.

A sealing lip can be arranged in the pipe segment, which protrudes into the opening of the drain clip. The sealing lip, in conjunction with a plug-in socket, permits good separation between the clean side of the filter element and the dirty side of the filter element. The clean side can preferably be the cylinder interior of the filter element and the dirty side can be the receiving space of the filter device.

A filter element according to the invention comprises a filter medium and a cylinder interior, wherein the filter element has a drainage clip according to the invention at the end, i.e. at an axial end of the filter element in relation to a longitudinal axis of the filter element, which is arranged to be secured against rotation relative to the cylinder interior. The anti-twist device is preferably achieved by a toothing between a support tube in the cylinder interior and by the toothing of the drain clip. The filter medium can be designed or folded as a bellows, which particularly preferably can have a cylindrical shape with a star-shaped cross section.

To prevent rotation, a support tube of the filter element in the cylinder interior, which is preferably designed as a latticed support tube, can have a contour corresponding to the toothing or to the recess(es) of the drain clip, so that the two elements can be brought into engagement with one another.

Such support tubes are used to stabilize the filter medium. The tube segment of the drain clip can advantageously protrude at least in regions into the cylinder interior and be connected to the support tube in a non-positive or positive manner, in particular in a detachable manner. The drain clip can thus be connected to the rest of the filter element in an uncomplicated manner by simply plugging it on at the end.

The filter element advantageously has at least two end plates. Such end plates are known per se. They hold the filter medium, e.g. B. as a pleated filter medium, in its axial end areas.

The drain clip according to the invention can advantageously be spaced axially from one of the end plates by a gap. Thus, the outlet disk is axially further out than the corresponding end disk and the movement or the spring movement of the annular plate segment and the sealing body is not impeded.

The annular plate segment of the drain clip can have the same outer diameter as the end disks, whereby the drain clip experiences a large deflection in the spring movement, but at the same time does not represent an obstacle when replacing the filter element due to an excessively large radial configuration.

A filter device according to the invention has a housing, a receiving space located in the housing, in which the aforementioned filter element according to the invention, comprising a filter medium and a cylinder interior, is arranged.

The drain clip according to the invention can be slipped onto a plug-in pipe socket for the fluid line, which is passed through the opening of the drain clip, so that it protrudes into the cylinder interior of the filter element; and a drain channel for draining a fluid located in the receiving space, the opening of which is covered by the sealing body. In contrast to a plug-like closure, the sealing body lies with an annular end face on the edge of the opening and a cover is created, but no closure of the opening.

The housing of the filter device also has a guide such. B. a guide groove or a guide ramp, which corresponds to the projection of the drain clip. For example, the projection can be guided in the guide groove. The exact positioning of the sealing body can take place by means of a rotary movement.

A stop can advantageously be provided for positioning, against which the projection abuts when it reaches the end position.

The guide can also have a ramp-like course, so that the projection presses the sealing body in the direction of the opening, so that it closes the outflow channel with pressure.

The filter element can be used in the filter device together with the drain clip, analogously to the aforementioned filter element according to the invention. Alternatively, however, the filter element and the drain clip can be removed as separate components of the filter device.

The housing can advantageously have at least one housing cover and one housing base, which are detachably connected to one another in such a way that the receiving space can be released and the filter element and the drain clip can be removed. This means that both elements can be replaced.

The filter element and the drain clip can preferably be mechanically connected to one another in such a way that the filter element and the drain clip can be removed together from the receiving space with virtually a single movement of the hand.

The filter device can also advantageously have a stop for positioning the sealing body over the opening of the drain channel when inserting the drain clip into the receiving space, the stop in the receiving space z. B. from the direction of the ground or from the direction of the housing wall protrudes.

The invention is described in detail below using a specific exemplary embodiment and using the attached figures. The individual features of the exemplary embodiment can also be used within the scope of the present invention taken individually in other variants.

• 1: Schnittansicht eines erfindungsgemäßen Filterelements;
• 2 Seitenansicht des erfindungsgemäßen Filterelements der 1;
• 3 erste Perspektivansicht einer erfindungsgemäßen Ablaufspange;
• 4 zweite Perspektivansicht der Ablaufspange der 3;
• 5 Schnittansicht einer erfindungsgemäßen Filtrationsvorrichtung umfassend die Filtrationsvorrichtung der 1 und 2 und die Ablaufspange der 3 und 4;
• 6 Detailansicht der 5;
• 7 vergrößerte Detailansicht der 6;
• 8 Perspektivansicht eines Stützrohres des Filterelements der 1;
• 9 Schnittansicht des Stützrohres des Filterelements der 8;
• 10 Perspektivansicht eines Ringplattensegments einer zweiten Ausführungsvariante einer Ablaufspange mit Dichtkörper;
• 11 Schnittansicht der Einbaulage eines Filterelements mit der Ablaufspange der 10 in einem Gehäuse einer Filtervorrichtung;
• 12 Perspektivansicht eines Ringplattensegments einer dritten Ausführungsvariante einer Ablaufspange mit Dichtkörper;
• 13 Schnittansicht der Einbaulage eines Filterelements mit der Ablaufspange der 12 in einem Gehäuse einer Filtervorrichtung;
• 14 Perspektivansicht eines Ringplattensegments einer vierten Ausführungsvariante einer Ablaufspange mit Dichtkörper;
• 15 Schnittansicht der Einbaulage eines Filterelements mit der Ablaufspange der 14 in einem Gehäuse einer Filtervorrichtung;
• 16 Perspektivansicht eines Ringplattensegments einer fünften Ausführungsvariante einer Ablaufspange mit Dichtkörper;
• 17 Schnittansicht der Einbaulage eines Filterelements mit der Ablaufspange der 16 in einem Gehäuse einer Filtervorrichtung;
• 18 Schnittansicht einer Ausführungsvariante eines sechsten Filterelements mit einem Stützrohr ohne Ablaufspange.

Examples show:

• 1 : sectional view of a filter element according to the invention;
• 2 Side view of the filter element according to the invention 1 ;
• 3 first perspective view of a drain clip according to the invention;
• 4 second perspective view of the drainage clasp 3 ;
• 5 Sectional view of a filtration device according to the invention comprising the filtration device of 1 and 2 and the drainage clasp of 3 and 4 ;
• 6 Detail view of 5 ;
• 7 enlarged detail view of 6 ;
• 8th Perspective view of a support tube of the filter element 1 ;
• 9 Sectional view of the support tube of the filter element 8th ;
• 10 Perspective view of a ring plate segment of a second embodiment variant of a drain clip with a sealing body;
• 11 Sectional view of the installation position of a filter element with the drain clip of 10 in a housing of a filter device;
• 12 Perspective view of a ring plate segment of a third embodiment variant of a drain clip with a sealing body;
• 13 Sectional view of the installation position of a filter element with the drain clip of 12 in a housing of a filter device;
• 14 Perspective view of a ring plate segment of a fourth variant embodiment of a drain clip with a sealing body;
• 15 Sectional view of the installation position of a filter element with the drain clip of 14 in a housing of a filter device;
• 16 Perspective view of a ring plate segment of a fifth embodiment variant of a drain clip with a sealing body;
• 17 Sectional view of the installation position of a filter element with the drain clip of 16 in a housing of a filter device;
• 18 Sectional view of an embodiment variant of a sixth filter element with a support tube without a drain clip.

1 and 2 show a filter element 1 according to the invention with a longitudinal axis 100 and with a filter medium 2.

The filter element 1 can preferably be designed as an oil filter medium.
The filter medium 2 is cylindrical with a cylinder interior 45 and can be configured, for example, as a filter medium folded to form a cylindrical bellows with folds running parallel to the longitudinal axis 100 .

A latticed support tube 32 is arranged in the cylinder interior 45 of the filter element 1 and the filter medium 2 , so that a fluid introduced into the filter element 1 can be conducted to the surface of the filter medium 2 .

The filter medium 2 is bordered at its ends by two end plates 42 and 43 which are preferably connected to the support tube 32 .

The filter element 2 according to the invention has at its end a drain clip 40 which is also according to the invention.

The drain clip 40 has an annular plate segment 52 which runs essentially parallel to the adjacent end plate 43 . The annular plate segment can be spaced apart from the end disk 43 by a gap 66, in particular in the axial direction.

In this case, the annular plate segment 52 can have the same outer radius as the end disk 43 .

Furthermore, the drain clip 40 has a sealing body 41 with a rotationally symmetrical shell-like collar area 50 . The collar area 50 is resiliently arranged parallel to the longitudinal axis 100 and perpendicular to the plane of the ring plate segment in the direction of movement 200, so that the sealing body 41 can close a channel opening in the closed state and releases the channel opening for the passage of a fluid in the open state. The sealing body can be made of an elastic material, e.g. As rubber, be made.

The sealing body 41 has the aforesaid shell-shaped collar area 50 protruding axially from the annular plate segment 52 with an annular end face 53 . This end face 53 seals off a residual fluid drain channel 28 within a filtration device 20 .

The drain clip 40 also has a cylindrical tube segment 57 with a longitudinal axis 300 which is perpendicular to the plane of the plate ring segment 52 on the collar area 50 opposite set side protrudes from the plate ring segment 52 and protrudes into the cylinder interior 45.

The tube segment 57 is connected in a first end area to the annular plate segment 52 in some areas and is connected in a second end area to clamping elements which, according to the invention, are configured as toothing 48, here as a toothed ring consisting of teeth 48 running parallel to the longitudinal axis 300 and tapering at the ends flat in the axial direction -1 or projections provided.

A corresponding contour 68 with recesses 68-1 is provided on the support tube 32, in particular on its inner circumference. Specifically, the contour for form-fitting engagement with the teeth 48 of the drain clip 40 is arranged in an end region on both sides of the support tube 32 .

The pipe segment 57 is connected to the annular plate segment 52 only in certain areas in a connection area 58 . An annular gap 51 in the form of an arc of a circle is provided outside the connecting area 58 between the annular plate segment 52 and the tube segment 57 . At least 50%, preferably at least 65%, particularly preferably at least 80% of the annular gap 51 encircles the pipe segment.

The annular gap 51 is provided at least in the area of the sealing body 41 . The connection area 58 is particularly preferably provided in a diametrically opposite area of the sealing body 41 between the annular plate segment 52 and the tube segment 57 .

As a result, the sealing body 41 , in particular the circular end face 53 , can be resiliently pressed against a boundary surface 64 on the edge of the residual fluid discharge channel 28 .

The filter element 1, in particular the drain clip 40, also has a central opening 44 for receiving a tubular insertion socket 5, with which, for example, cleaned fluid, in particular oil, can be drained from the cylinder interior of the filter element 1. The direction of the arrow 400 is used to show the direction in which the filter element 1 can be pushed onto the plug-in socket 5 .

In 3-4 the flow clip 40 according to the invention is shown in more detail. Within the scope of the present invention, the drain clip 40 can be pushed onto and/or inserted onto the remaining components of the filter element 1 at the edge from the axial direction. Thus, both the drain clip 40 as a component and the filter element 1 with this drain clip 40 and a filtration device 20 with this filter element 1 are according to the invention.

The sealing body 41 has a projection 55 which protrudes in the direction of the pipe segment 57 of an opening 49 in the annular plate segment 52 . The sealing body 41 is inserted in this opening. In addition, the sealing body 41 has an annular formation 56 as a stop against the opening 49 . The sealing body 41 thus has a basic shape 54 of an asymmetrically constructed hourglass. This prevents the sealing body 41 from being removed from the opening 49 when the filter element 1 is removed. The ring-shaped formation 56 is located on the opposite side of the opening 49 from the collar area 50.

Especially in 3 and 4 the annular gap 51 and the connecting area 58 between the tube segment 57 and the annular plate segment 52 can be seen.

The annular plate segment 52 can be made of a deformable, preferably an elastically deformable material, e.g. B. a plastic or a metal, in particular spring steel, may be formed.

Due to the partially circumferential annular gap 51, a part of the annular plate segment 52 and thus also the sealing body 41 arranged on the annular plate segment 52 is resiliently mounted relative to the fixed pipe segment 57, which is clamped in particular in the cylinder interior 45.

In the context of the present invention, a partially circumferential annular gap means in particular that the annular gap does not have a ring-shaped, full-circumference gap, but only comprises a certain percentage, in particular more than 50%, of a complete ring.

Furthermore, the drain clip 40 , in particular the pipe segment 57 , has an internal sealing lip 61 for sealing against the insertion pipe 5 .

5-7 represent the installation situation of a filter element 1 with the drain clip 40 in a filtration device 20.

The filtration device 20 has a housing 26 with a housing cover 21 and a housing base 24 which delimit a receiving space 25 within the housing 26 . The receiving space 25 is accessible by detaching the housing cover 21 from the housing base 24 . The connection between the housing cover 21 and the housing base 25 is a screw connection Binding 22 formed, wherein the housing cover and the housing base 24 each have a thread. A sealant 23, e.g. B. a sealing ring, may be provided in order to prevent leakage of fluids located in the receiving space 25.

The bottom of the housing 24 has a plurality of channels 27 , 28 at the end in the receiving space 25 . A first channel is provided as a fluid discharge channel 27 for discharging a cleaned fluid from the cylinder interior 45 of the filter element 1 . A second channel is provided as a drain channel 28 for draining uncleaned fluids out of the receiving space 25 . This derivation is necessary, for example, when the filter element 1 is removed from the housing 26 of the filtration device 20 , with unfiltered residual fluid being undesirable during handling and being able to drain off through the discharge channel 28 .

The drain channel 28 is used to drain off a fluid located in the receiving space 25 of the filtration element 20 when the filter 1 is removed.

An inlet channel 65 for feeding an unfiltered fluid into the receiving space is also provided in the terminal area of the housing base (not shown in the figures).

The housing cover 21 has a pressure relief valve 60 which protrudes into the cylinder interior 45 of the filter element 1 on the cover side. The pressure relief valve 60 has a spring-loaded valve body 31 and a valve seat 19 . The valve body 31 in the closed state of the pressure relief valve 60 is seated on a stop 59 of the support tube 32 . A spring, in particular a spiral spring 29, is provided between the valve body 31 and the valve seat 19. The pressure relief valve 60 serves as a bypass valve for transferring the fluid from the receiving space 25 of the housing 26 into the cylinder interior 45 of the filter element 1 in the event of an unintentional increase in pressure, e.g. B. clogging of the filter medium.

To accommodate the pressure relief valve 60 on the housing cover 21, the housing cover has projections 30, e.g. B. in the form of ribs or locking hooks on.

Overall, the filtration in the variant of a filtration device 20 shown in the figures proceeds in such a way that an unfiltered fluid is fed into the receiving space, which is filtered through the filter medium 2 of the filter element 1 and is fed as filtered fluid into the cylinder interior 45 of the filter element, from which it is derived.

However, the filtration direction can also be implemented in the opposite direction, e.g. B. by introducing the unfiltered fluid into the cylinder interior 45.

The fluid discharge channel 27 ends at the end in the plug-in socket 5. The plug-in socket 5 protrudes into the cylinder interior 45 of the filter element 1 when the filter element 1 is in the installed state. The plug-in socket 5 has a stop 6 or a bottom surface on its outside, on which the drain clip 40 rests in the connection area 58 . The area of the ring plate segment 57 of the drain clip 40 in which the sealing body 41 is arranged, however, does not rest on any axial stop but is arranged axially movable in the direction 200 in the receiving space 25 .

In the assembled state of the filter element 1, the sealing collar 50 is arranged over a terminal opening 54 of the discharge channel 28, the end face 53 of the collar region 50 resting on a bottom surface 64 of the housing bottom 24 and sealing the opening 54 at the edge.

The insertion socket 5 has a front first socket section 62 and a downstream second socket section 63, the outer diameter of the second socket area 63 being larger than the outer diameter of the first front socket area 62. As a result, with increasing insertion depth of the filter element 1 on the insertion socket 5, there is greater deformation of the sealing lip 61 and thus a greater sealing effect between the filter element 1 and the plug-in socket 5 in the cylinder interior 45.

The shape of the drain channel 28 is in 6 particularly well presented. A bottom surface 64 can be seen, which is designed as an annular support plane. In this figure, the channel is partially formed as a pipe socket.

A projection 67 arranged at the edge in the receiving space 25 on the housing 26 serves for better positioning of the sealing body 41 and the drain clip 40. The sealing body 41 can thus be guided along the housing wall of the housing 26 at the edge. A projection 67 protruding radially from the housing wall into the housing interior of the housing serves in particular as a hold-down element for pressing the sealing body 41 over the opening 54 and defines an edge-side guide 75 of the sealing body 41 and the annular plate segment 52 when the filter element 1 is screwed into the housing 26. In the area of the projection 67, a stop 76 is arranged at the end in the guide 75, which limits the rotational movement.

As in 3 and 5 As can best be seen, the sealing element protrudes slightly beyond the outer circumference of the annular plate segment 52 in the radial direction. This overhang is to be understood as a projection 69 . Alternatively, it can also be arranged on the annular plate segment 52 .

The sealing body 41 is mounted flexibly and is arranged exclusively above the opening 54 of the outflow channel 28 . This means that it does not enter the drain channel 28 . A high axial force is therefore not necessary to seal off the outflow channel 28 .

The drain clip 41 is inserted pointing in the direction of the housing 26 into the housing cover 21 up to a stop and can then be screwed into the housing base 25 .

Due to the rotational movement that occurs when screwing in, the sealing body 41 is positioned by its contact with the projection 67 from a certain screwing-in depth. It can then slide into an optional guide groove and be moved further up to a further stop.

A detent arranged between the pressure relief valve and the housing cover 25 can ensure that the power transmission of the rotary movement takes place with a precisely defined force, so that as soon as the filter element is in the end position, the valve spins and no further rotary movement of the filter element takes place.

This provides a cost-effective solution that is structurally simple to handle and requires only low bracing forces. Accordingly, the removal and replacement of the filter element is possible without great effort.

In addition to being used in oil filtration, the filtration device 20 according to the invention and, connected thereto, the drain clip according to the invention and the filter element according to the invention can also be used to filter air or fuel.

10 shows a first annular plate segment 152 of a second embodiment variant of a drain clip 140 with a sealing body 141. This is arranged resiliently on the first annular plate segment 152. The non-illustrated pipe segment can be analogous to 3 and 4 be formed and have a front toothing. An annular gap 151 is arranged between the first annular plate segment 152 and the tube segment, which is connected in a connecting area 158 to a second annular plate segment 172 rigidly connected to the tube segment. The entire drain clip 140 can be made of a plastic. The first annular plate segment 152 comprises two spring arm segments 173 and 174, which are arranged in an arcuate manner at the edge and are preferably arranged symmetrically to one another. In the insertion direction Z of the filter element into the filtration device, the spring arms protrude slightly out of the plane of the second annular plate segment 172 .

11 shows a further embodiment of a filtration device 120 with a housing 126 comprising a housing cover 121 and a housing base 124, which define a receiving space 125. A central plug-in pipe socket 105 protrudes into the receiving space 126, on which the filter element 101 arranged in the receiving space 126 is arranged, in particular plugged. The opening 44 of the drain clip 140 is guided over the plug-in pipe socket 105 .

In addition to the drain clip 140 described above, the filter element 101 comprises a filter medium 2 which forms a cylinder interior 145 and in which a latticed support tube 132 stabilizing the filter medium is arranged. In an end region, this has a contour 168 for toothing, analogously 1 , With a terminal toothing of the pipe segment of the drain clip 140. The filter element 101 is located within the housing 126 in its end position. The filter element 101 is inserted and the ring segment 152 is rotated in the guide 175, which is formed by the projection 167, up to a stop (not shown) analogously to FIG 11 turned. The projection runs in a ramp-like manner in the direction of rotation, so that the distance between the projection and the housing base decreases in the direction of rotation, as a result of which the sealing body 141 is pressed by an additional force in the direction of the opening 152 of the outflow channel 128 in the housing.

Analogous to 1-10 the sealing body 141 of the second exemplary embodiment also has a collar area 150 and an end face 153 .

12 shows a first ring plate segment 252 of a third embodiment variant of a drain clip 240 with a sealing body 241, which is designed as a closed ring plate. The sealing body is resiliently arranged by the first ring plate segment 252 on a second ring plate segment 272, which is also designed as a closed ring plate. The non-illustrated pipe segment can be analogous to 3 and 4 be formed and have a front toothing.

Parallel to the first ring plate segment 252 along the longitudinal axis of the tube segment has the Drainage clasp 240 has a second annular plate segment 272, which is resiliently connected to the first annular plate segment 252 via a connecting region 258 in the form of a connecting web at the edge.

The second ring segment 272 is rigidly connected to the tube segment so that a connection to the support tube 232 of the filter element 201 is possible by inserting the tube segment. The entire drain clip 240 can be made of a plastic.

12 shows a further embodiment of a filtration device 220 with a housing 226, comprising a housing cover 221 and a housing base 224, which define a receiving space 225. A central plug-in pipe socket 205 projects into the receiving space 226, on which the filter element 201 arranged in the receiving space 226 is arranged, in particular plugged. The opening 244 of the drain clip 240 is guided over the plug-in pipe socket 205 .

In addition to the drain clip 240 described above, the filter element 201 comprises a filter medium 202 which forms a cylinder interior 245 and in which a latticed support tube 232 stabilizing the filter medium is arranged. In an end area, this has a contour 268 for toothing, analogously 1 , With a terminal toothing of the pipe segment of the drain clip 240. The filter element 201 is located within the housing 226 in its end position. The filter element 201 is inserted and the ring segment 252 is rotated in the guide 275, which is formed by the projection 267, up to a stop (not shown) analogously to FIG 11 turned. The projection runs in a ramp-like manner in the direction of rotation, so that the distance between the projection and the housing base decreases in the direction of rotation, as a result of which the sealing body 241 is pressed in the direction of the opening 252 of the outflow channel 228 in the housing by an additional force.

Analogous to 3 and 4 the sealing body 241 of the second exemplary embodiment also has a collar area 250 and an end face 253 .

14 shows a first annular plate segment 352 of a fourth embodiment variant of a drain clip 340 with a sealing body 341, which is designed as a closed annular plate. The sealing body is resiliently arranged by the first ring plate segment 352 on a second ring plate segment 372, which is also designed as a closed ring plate. The non-illustrated pipe segment can be analogous to 3 and 4 be formed and have a front toothing.

The first annular plate segment 352 has one or more curved areas 373 as spring arms opposite the planar second annular plate segment, which lead away from the second annular plate segment in the Z insertion direction. The sealing body 341 is arranged on one of these curved areas 373 .

The two annular plate segments 352 and 373 are resiliently connected to one another at the edge via a connecting area 358 in the form of a connecting web.

The second ring segment 372 is rigidly connected to the tube segment. The entire drainage clip 340 can be made of a plastic. Due to the curved areas 373, in which the two annular plate segments 352 and 373 are further apart, the drain clip can be better guided in the guide 375 below the projection 367 in the housing 320, as is shown in 15 is recognizable.

15 shows a fourth embodiment of a filtration device 320 with a housing 326 comprising a housing cover 331 and a housing base 324, which form a receiving space 325. In the receiving space 326 there is a central plug-in pipe socket 305 on which the filter element 301 arranged in the receiving space 326 is arranged, in particular plugged. The opening 344 of the drain clip 340 is guided over the plug-in pipe socket 305 .

In addition to the drain clip 340 described above, the filter element 301 comprises a filter medium 302 which forms a cylinder interior 345 and in which a latticed support tube 332 stabilizing the filter medium is arranged. In an end area, this has a contour 368 for toothing, analogously 1 , With a terminal toothing of the pipe segment of the drain clip 340. The filter element 301 is located within the housing 326 in its end position. The filter element 301 is inserted and the ring segment 352 is rotated in the guide 375, which is formed by the projection 367, up to a stop, which is not shown, analogously to FIG 11 turned. The projection 367 can run like a ramp in the direction of rotation, so that the distance between the projection and the housing base decreases in the direction of rotation, as a result of which the sealing body 341 is pressed by an additional force in the direction of the opening 352 of the outflow channel 328 in the housing.

At this point it should be mentioned that the technical function of the ramp-like course of the projection 367 can also be achieved by varying the wall thickness of the ring segment 352, so that the ramp-like course can also be provided on the ring segment 352 of the drain clip 340. This also applies to all other design variants of a drain clip.

The aforesaid stop for limiting the rotational movement does not necessarily have to be provided either, so a stop can also be provided on the upper side of the first ring segment 352, ie on the side facing the filter medium. This also applies to all other design variants of a drain clip.

16 shows a first annular plate segment 452 of a fourth variant embodiment of a drain clip 440. On the annular plate segment 452 is a spring clip 473 made of a flexible material, e.g. B. spring steel, arranged on which the annular plate segment 452 resiliently connects to a sealing body 441. The sealing body is thus arranged resiliently in relation to the ring plate segment 452 on this ring plate segment 452 by means of the spring clip 473 . The ring plate segment 452 is rigidly connected to a non-illustrated tube segment of the drain clip 440 .

The non-illustrated pipe segment can be analogous to 3 and 4 be formed and have a front toothing.

Compared to the planar second annular plate segment, the spring clip 473 has one or more curved areas 374 as spring arms, which lead away from the second annular plate segment in the Z insertion direction and which rest on a wall of the housing 426 in the guide 475 and are braced against this wall. The sealing body 441 is arranged between these bent areas 474 .

The annular plate segment 452 and the spring clip 473 are connected via a connecting area 458 in the form of a connecting means, e.g. B. a screw or rivet resiliently connected to each other.

The first ring segment 452 is rigidly connected to the tube segment. Additional bending of the spring clip 473 in the area between the two bent areas 374 achieves a favorable spacing of the sealing body 440 from the first annular plate segment 452, so that the drain clip can be guided better in the guide 475 below the projection 467 in the housing 420, as is the case here in 17 is recognizable.

17 shows an embodiment of a filtration device 420 with a housing 426, comprising a housing cover 431 and a housing base 424, which form a receiving space 425. In the receiving space 426 there is a central plug-in pipe socket 405, on which the filter element 401 arranged in the receiving space 426 is arranged, in particular plugged. The central opening 444 of the drain clip 440 is guided over the plug-in pipe socket 405 .

In addition to the above-described drain clip 440, the filter element 401 comprises a filter medium 402 which forms a cylinder interior 445 and in which a latticed support tube 432 stabilizing the filter medium is arranged. In an end area, this has a contour 368 for toothing, analogously 1 , With a terminal toothing of the pipe segment of the drain clip 440. The filter element 401 is located within the housing 426 in its final position. The filter element 401 is inserted and the ring segment 452 is rotated in the guide 475, which is formed by the projection 467, up to a stop, which is not shown, analogously to FIG 11 turned. Other features are analogous to the previous embodiment variants

18 shows a sixth embodiment of a filter element 501, which is provided with a sixth embodiment of a drain clip 540.

The figure shows an embodiment variant of a drain clip 540 with a first annular plate segment 552, which is rigidly connected to a first pipe segment 557, which has a central opening 544 with an internal sealing lip for plugging onto a plug-in pipe socket (not shown) of a filter device.

A projection 572 is arranged on the first annular plate segment 552 and resiliently connects the annular plate segment 552 to a sealing body 541 . The sealing body is thus arranged resiliently in relation to the ring plate segment 552 on this ring plate segment 552 by means of the projection 572 .

The tube segment 557 has teeth 548 on the end face with a projection or a single tooth 548-1, which engages within the framework of a toothing, in particular in a form-fitting manner, in a corresponding contour 568 of the support tube 532 of the filter element 501 that corresponds to the toothing 548.

The annular plate segment 552 and the projection 572 are connected to one another via a connection area 558 .

The drain clip 540 can be fixed in a guide of the housing of a filter device by a rotary movement with axial fixation by the projection 572, analogously to the previous embodiment variants.

This in 18 The filter element 501 shown comprises, in addition to the above-described drain clip 540, a filter medium 502 which forms a cylinder interior 545 and in which a latticed support tube 532 stabilizing the filter medium is arranged. In one end area, this has a contour 568 for interlocking with the terminal toothing 548 of the pipe segment 557 of the drain clip 540 and forms an anti-twist device between the drain clip 540 and the remaining components of the filter element 501.

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• WO 2007/028426 A [0002]
• US2008169233A [0002]
• DE 29602330 U1 [0002]
• DE 10026451 A1 [0002]
• WO 2011/070011 A1 [0003]

Claims (12)

Drainage clip (40, 140, 240, 340, 440, 540) for arrangement in a filtration device (20, 120, 220, 320, 420, 520) comprising an annular plate segment (52, 152, 252, 352, 452, 552). Pipe segment (57, 557) with a longitudinal axis (300), an opening (44, 144, 244, 344, 444, 544) for passing through an insertion socket (5, 105, 205, 305, 405, 505) of the filtration device (20, 120, 220, 320, 420, 520) and a sealing body (41, 141, 241, 341, 441, 541), wherein the sealing body (41, 141, 241, 341, 441, 541) on the annular plate segment (52, 152, 252, 352, 452, 552) or is part of the annular plate segment (52, 152, 252, 352, 452, 552) and wherein the tube segment (57, 557) is located in a cylinder interior (45, 145, 245, 345, 445 , 545) of a filter element (1, 101, 201, 301, 401, 501) of the filtration device (20, 120, 220, 320, 420, 520) can be fixed and wherein the sealing body (41, 141, 241, 341, 441, 541) is arranged to be movable, in particular resilient, relative to the pipe segment (57, 557), characterized in that at the end of the pipe segment (57, 557) there is a toothing (48, 548) and/or a recess for receiving a toothing in a non-positive and/or positive manner, which extends parallel to the longitudinal axis (300) of the pipe segment (57, 557) extends. drain clip after claim 1 , characterized in that between the annular plate segment (52, 152, 252, 352, 452, 552) and the tube segment (57, 557) an at least partially circumferential annular gap (51, 151, 251, 351) is arranged and wherein the annular plate segment ( 52, 152, 252, 352, 452, 552) and the pipe segment (57, 557) are connected to one another in a connection area (58, 158, 258, 358). Drainage clip according to one of the preceding claims, characterized in that the sealing body (41, 141, 241, 341, 441, 541) has a symmetrical collar area (50, 150, 250, 350, 450, 550) which, in relation to the annular plate segment (52 , 152, 252, 352, 452, 552) protrudes in the axial direction, the collar area (50, 150, 250, 350, 450, 550) having an end face (53, 153, 253, 353, 453, 553) for sealing an opening (54, 154, 254, 354, 454) of a discharge channel (28, 128, 228, 328, 428) of the filtration device (20, 120, 220, 320, 420). Drainage clip according to one of the preceding claims, characterized in that the drainage clip (40), in particular in the area of the sealing body (41), has a projection (69) which protrudes radially from the contour of the annular plate segment (52). Filter element (1, 101, 201, 301, 401, 501) comprising a filter medium (2, 102, 202, 302, 402, 502) and a cylinder interior (45, 145, 245, 345, 445, 545), characterized in that that the filter element (1, 101, 201, 301, 401, 501) has a drainage clip (40, 140, 240, 340, 440, 540) at the end according to one of the preceding claims, wherein the drainage clip (40, 140, 240, 340 , 440, 540) so that it cannot rotate relative to the cylinder interior (45, 145, 245, 345, 445, 545) of the filter element (1, 101, 201, 301, 401, 501). filter element after claim 5 , characterized in that the filter element (1, 101, 201, 301, 401, 501) has a support tube (32, 132, 232, 332, 432, 532) which in the cylinder interior (45, 145, 245, 345, 445 , 545) and wherein the tube segment (57, 557) of the drain clip (40, 140, 240, 340, 440, 540) protrudes at least in regions into the cylinder interior (45, 145, 245, 345, 445, 545) and , in particular detachable, with the support tube (32, 132, 232, 332, 432, 532) in a non-positive or positive manner by means of a toothing involving the toothing (48, 548) and/or recess arranged at the end of the tube segment (57, 557). positive recording of teeth is connected. filter element after claim 5 or 6 , characterized in that the supporting tube (32, 132, 232, 332, 432, 532) at least on one end has a toothing (48, 548) or recess of the drain clip (40, 140, 240, 340, 440, 540) corresponding to the end contour (68, 168, 268, 368, 468, 568). Filter device (20, 120, 220, 320, 420) with a housing (26, 126, 226, 326, 426) with a receiving space (25, 125, 225, 325, 425) in which an exchangeable filter element (1, 101, 201, 301, 401, 501) according to one of the preceding claims is arranged, · with a plug-in pipe socket (5, 105, 205, 305, 405) for the fluid line , which is guided through the opening (44, 144, 244, 344, 444, 544) of the drain clip (40, 140, 240, 340, 440, 540) and which into the cylinder interior (45, 145, 245, 345, 445 , 545) of the filter (1, 101, 201, 301, 401, 501); and • with a discharge channel (28, 128, 228, 328, 428) for discharging a fluid in the receiving space (25, 125, 225, 325, 425), whose opening (54, 154, 254, 354, 454) through the Sealing body (41, 141, 241, 341, 441, 541) is covered, characterized in that the housing (26, 126, 226, 326, 426) has a guide (75, 175, 275, 375, 475) which with the projection (69) of the drain clip (40, 140, 240, 340, 440, 540) corresponds in such a way that by a rotary movement The sealing body (41, 141, 241, 341, 441, 541) is positioned over the opening (54, 154, 254, 354, 454). filter device claim 8 , characterized in that the housing (26, 126, 226, 326, 426) has at least one housing cover (21, 121, 221, 321, 421) and a housing base (24, 124, 224, 324, 424) which can be removed are connected to one another in such a way that the receiving space (25, 125, 225, 325, 425) can be released and the filter element (1, 101, 201, 301, 401, 501) and the drain clip (40, 140, 240, 340, 440, 540) can be removed. filter device claim 8 or 9 , characterized in that the sealing body (41, 141, 241, 341, 441, 541) is arranged exclusively above the opening (54, 154, 254, 354, 454) of the discharge channel (28, 128, 228, 328, 428). . Filter device according to one of the preceding claims, characterized in that the filter device (20, 120, 220, 320, 420, 520) or the drain clip (40, 140, 240, 340, 440, 540) has a stop (76), in particular as a End stop of the guide (75, 175, 275, 375, 475) for positioning the sealing body (41, 141, 241, 341, 441, 541) when inserting the drain clip (40, 140, 240, 340, 440, 540) in has the receiving space (25), the stop (76) being protruded from the wall of the housing (26, 126, 226, 326, 426) or from the drain clip, in particular from an annular plate segment (52, 72, 152, 172, 252, 272 , 352, 372, 452, 552) of the drain clip (40, 140, 240, 340, 440, 540) into the receiving space (25, 125, 225, 325, 425). Filter device according to one of the preceding claims, characterized in that the guide (75, 175, 275, 375, 475) or the drain clip (40, 140, 240, 340, 440, 540) has a ramp-like course, such that in the Execution of the rotary movement for inserting the filter element (1, 101, 201, 301, 401, 501) pressing the sealing body (41, 141, 241, 341, 441, 541) over the opening (54, 154, 254, 354, 454 ) he follows.

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