CN107288784B

CN107288784B - Filter mechanism

Info

Publication number: CN107288784B
Application number: CN201710232739.9A
Authority: CN
Inventors: M.K.拉雅戈帕尔; P.马里安班纳
Original assignee: Mann and Hummel GmbH
Current assignee: Mann and Hummel GmbH
Priority date: 2016-04-11
Filing date: 2017-04-11
Publication date: 2021-03-30
Anticipated expiration: 2037-04-11
Also published as: DE102017002327A1; CN107288784A; DE102017002327B4

Abstract

The filter mechanism has a filter housing and a tensioning bracket surrounding the filter housing. The tensioning bracket comprises a clamp and a tensioning clamp which are connected in a pivotable manner by a hinge, wherein the clamp and the tensioning clamp are connected adjacent to the hinge in a form-fitting manner by engagement of the projection into the engagement window.

Description

Filter mechanism

Technical Field

The invention relates to a filter device, in particular for filtering liquids, comprising a filter housing and a tensioning bracket which surrounds the filter housing.

Background

For example, DE 4241586C 1 discloses filters with a filter element in a filter housing, which can be fastened in a vehicle by means of a tensioning bracket. The tensioning bracket is designed, for example, as a tensioning bracket which surrounds the housing in an annular manner and can be fastened to the housing by means of a tensioning device.

Disclosure of Invention

The object of the invention is to provide a simple and safe fastening of a filter device to a receiving component in a motor vehicle, for example.

This object is achieved according to the invention by means of the features of the invention. The preferred embodiment and other embodiments illustrate specific modifications.

The filter arrangement according to the invention can be used for liquid filtration, for example for fuel filtration in motor vehicles. But can also be used for gas filtration, for example for the filtration of combustion air of internal combustion engines.

The filter mechanism has a filter housing with a particularly round, preferably circular, outer circumference, which is surrounded by a tensioning bracket, in particular in the circumferential direction, by means of which the filter mechanism can be fixed to a further component. The tensioning bracket rests against the housing outer side of the, in particular circular, filter housing and can be adjusted between a relaxed state, in which the tensioning device can be removed or slipped onto the housing, and a tensioned state, in particular in the circumferential direction, in which the tensioning device exerts a clamping force on the filter housing and is fastened to the filter housing.

The tensioning bracket advantageously also has a fastening mechanism which can be fastened to another component, for example a bracket of the vehicle. The filter mechanism can thus be fastened to the further component, for example a carrier of a vehicle, by means of the fastening mechanism and the tensioning bracket.

The tensioning bracket according to an embodiment of the invention comprises a clip and a tensioning clamp which are connected in a pivotable manner by a hinge. Whether the clip or the tightening clip bears directly or indirectly against the outside of the filter housing and exerts a clamping force on the housing in the tightened state. The hinge preferably has a degree of freedom in the circumferential direction in addition to the ability to pivot about an axis which is preferably arranged perpendicular to the circumferential direction, so that the tensioning clamp is also mounted on the hinge so as to be movable along the circumference. It therefore preferably relates to a hinge with a pivot axis or rotation axis which can be displaced in the circumferential direction.

During the tensioning, the clip and the tensioning clamp execute a relative pivoting movement with respect to one another, which is made possible by a joint connecting these components. In addition to the hinge, a positive connection between the clip and the clamping band, in particular directly adjacent to the hinge, is also present, at least in the tensioned state. The positive connection transfers forces in the circumferential direction between the clamp and the clamping band in the tensioned state and thus relieves the hinge of the tensioning force, thus reducing the risk of the connection in the hinge region being damaged by high tensioning forces but also by forces due to vibrations.

The positive connection can furthermore be established in a simple manner by a projection which projects into the engagement window. For example, in embodiments in which the clip and/or the clamping band are designed as plastic components, these can be produced internally in the injection molding process, including the projection and the engagement window.

Another advantage is that a positive engagement is produced simply and safely during the tensioning process. As the stress in the clamping bracket increases, this clamping bracket bears against the outside of the filter housing, thereby simultaneously clamping the projection in the engagement window. The wall which frames and delimits the engagement window rests on the projection, so that the tensioning forces acting in the circumferential direction are transmitted at this point and the hinge is at least partially, if necessary completely, relieved of the tensioning forces.

According to an advantageous embodiment, the projection is arranged on the clip and the engagement window is arranged on the clamping bracket. The hinge is also advantageously located on the tightening clamp. The hinge is formed, for example, by at least one, preferably two hinge pins, the longitudinal axes of which are orthogonal to the circumferential direction. The hinge pin or hinge pins are in particular located at the end of the end face of the clamping band. The engagement window is adjacent to this end face of the clamping bracket, but is advantageously spaced apart from the longitudinal axis of the pin, so that weakening of the clamping bracket in the region of one or several hinge pins is avoided. In any case, it is expedient for the hinge and the engagement window to be adjacent to the same end of the tensioning clamp. The hinge pin or the pin longitudinal axis may preferably define a rotation axis or a swing axis of the hinge.

According to an alternative embodiment, the projection is on the tensioning clamp and the engagement window is on the clamp. In this case, a form-fitting connection is also achieved between the clamping band and the clip. Furthermore, the hinge can also be arranged at the clip, in particular in the embodiment as one or two hinge pins.

In any case, a positive connection exists in the tensioned state of the tensioning clamp. However, it may also be advantageous if the projection already in the relaxed state projects into the engagement window, so that only a force transmission in the circumferential direction or in the tightening direction is added as the tightening clamp is tightened.

According to a further advantageous embodiment, the hinge has a larger bearing play in the circumferential direction than the projection engaging in the engagement window. This embodiment ensures that, with the tightening of the tightening clamp, the force transmission takes place via the projection and the wall delimiting the engagement window, and not or only to a small extent via the hinge. During the tensioning process, the hinge can be displaced in the circumferential direction within the frame of its bearing gap, whereas the projection, on account of the smaller gap prevailing there, is earlier in the tensioning window in a force-transmitting abutment with the wall of the engagement window. In this way, it is preferably achieved that, in the tensioned state, for example, by means of a positive connection formed by the window and the projection, a movement of the tensioning clamp in the circumferential direction and in the tensioning direction, that is to say in the direction defined by the direction of extension of the tensioning clamp away from the hinge, is interrupted, while the hinge geometrically also has play in this direction and is therefore force-free in the circumferential direction.

According to a further advantageous embodiment, the bearing play of the hinge is achieved in that one or both hinge pins project into the recess and one or several hinge pins are accommodated with the play in the recess. The recess has, for example, an elongated shape extending in the circumferential direction, for example, a sickle shape.

The hinge pin or hinge pins projecting into the recess advantageously have a circular cross-sectional shape.

According to a further advantageous embodiment, the tensioning clamp has a tensioning device at the end opposite the hinge, with which the tensioning clamp is adjusted between a relaxed state and a tensioned state. By means of the tensioning device, a connection with the opposite end of the gripper is established in the tensioned state, and in addition a sufficiently large tensioning force is generated. The tensioning device comprises, for example, a tensioning lever and at least one tensioning hook, which can be hooked onto opposite ends of the clip and can be tensioned by the tensioning lever. The tensioning device is therefore preferably part of the tensioning clamp or is firmly connected to the tensioning clamp and is designed for detachable engagement with the clip.

The previously described embodiment is in one aspect a separate invention. In a further aspect, the invention therefore also relates to a filter arrangement having a filter housing and having a tensioning bracket which surrounds the filter housing, wherein the tensioning bracket comprises a clip and a tensioning bracket which are pivotably connected by a hinge, wherein the tensioning bracket has a tensioning device at the end opposite the hinge, with which the tensioning bracket is adjustable between a relaxed state and a tensioned state. This filter mechanism can of course be combined with all other features, designs and technical solutions described at the present time.

The invention further relates to a tensioning bracket for a filter mechanism, wherein the tensioning bracket is constructed in the manner described above and has a clip and a tensioning clamp, wherein the clip and the tensioning clamp are connected by a hinge and additionally by a positive-locking engagement of a projection into an engagement window.

Drawings

Further advantages and suitable embodiments result from further examples, from the description of the figures and from the figures. The figure is as follows:

fig. 1 shows a perspective view of a filter arrangement for liquid filtration with a tensioning bracket surrounding a filter housing;

FIG. 2 shows the filter mechanism in another perspective view;

fig. 3 shows a section of the tensioning clamp of the tensioning bracket with two hinge pins forming a hinge and an engagement window;

FIG. 4 shows a section of the clip which cooperates with the tightening clamp, with recesses for receiving tightening pins and with a triangular projection;

FIG. 5 shows the tightening clip and clip in the installed state, in which the projection projects into the engagement window;

fig. 6 shows the illustration according to fig. 5 in a section through the projection and the engagement window;

FIG. 7 shows the clip and tightening clip in perspective view;

fig. 8 shows the clip holder and the tensioning clamp in a top view.

In the drawings like components are provided with like reference numerals.

Detailed Description

Fig. 1 and 2 each show a perspective view of a filter arrangement 1, which is preferably used for liquid filtration, for example for fuel filtration in a motor vehicle. The filter arrangement 1 has a cylindrical housing 2, around which a tensioning bracket 3 with a clamping device 4 and a tensioning clamp 5 is placed. The clip mechanism 4 has two laterally projecting fastening wings 6, by means of which the filter mechanism 1 can be fastened to another component, for example a bracket in a motor vehicle. A hole portion for fastening is formed in the stationary blade.

The clip 4 and the tensioning clamp 5 (shown separately in fig. 7 and 8) each enclose more than one corner section of the outside of the filter housing 2, wherein the clip 4 extends slightly over 180 ° and the tensioning clamp extends slightly less than 180 ° over the circumference. The clamping band 5 is assigned a clamping device 7 which comprises a clamping bar 8 and a clamping hook 9 which can be adjusted by the clamping bar 8 between a relaxed state and a clamped state. The free end of the tensioning hook 9 encompasses a flange 10 on the end of the one end side of the clip 4. In the tensioned state, the tensioning hook 9, which forms a tensioning spring, generates a tensioning force in the circumferential direction, which extends around the clamping device 4 and the tensioning clamp 5 and fastens the tensioning bracket 3 to the filter housing 2 with a corresponding holding force. The holding force and the tightening force are large enough to firmly connect the tightening bracket 3 with the filter housing 2.

As can be seen from fig. 1 in conjunction with the further figures, the clamping bracket 5 is pivotably connected to the clip 4 at the end opposite the tensioning means 7 by a hinge 11. The hinge 11 comprises two hinge pins 12 (fig. 3) which are formed integrally with the clamping band 5 at the end of the latter and extend orthogonally to the longitudinal direction of extension which coincides with the circumferential direction. The hinge pin 12 has a circular cross-sectional shape and projects upward and downward transversely to the longitudinal extension over the lateral edges of the clamping bracket 5.

The hinge pin 12 projects into an associated sickle-shaped recess 13 (fig. 4 to 6), which is machined into the clip 4 adjacent to the end face and is formed integrally with this clip. The clamping bracket 5 can thus execute a pivoting movement relative to the clamp 4 about a pin longitudinal axis 14, which extends orthogonally to the longitudinal or circumferential direction of the clamping bracket 5.

Adjacent to the hinge pin 12, an engagement window 16 having a rectangular cross-sectional shape is formed in the clamping bracket 5. A projection 15 on the end face of the clip 4 is associated with the engagement window 16, which projection has a triangular cross-sectional shape and, at least in the tightened state, optionally also in the relaxed state, projects into the engagement window 16. A positive connection between the clip 4 and the clamping bracket 5 in the circumferential direction or the clamping direction is thereby achieved by the projection 15 bearing against the wall delimiting the engagement window 16.

In order to simultaneously achieve the force release of the hinge 11 in the tensioned state, the hinge pin 12 is inserted with a sufficiently large bearing play into the recess 13 on the gripper 4. The bearing play between the hinge pin 12 and the recess 13 ensures that, in the tensioned state, only or at least a large part of the tensioning force is transmitted between the projection 15 and the wall delimiting the engagement window 16. Accordingly, the hinge pin 12 is relieved of the tensioning force at the tensioning clamp 5.

As can be seen in particular from fig. 4, the recess 13 has an elongated, approximately sickle-shaped or triangular cross-sectional shape in the circumferential direction. The recess 13 is delimited by a correspondingly shaped wall section which is formed integrally with the clip 4.

Claims

1. A filter arrangement having a filter housing (2) and having a tensioning bracket (3) which surrounds the filter housing (2), characterized in that the tensioning bracket (3) comprises a clip (4) and a tensioning clamp (5) which are pivotably connected by a hinge (11), wherein the clip (4) and the tensioning clamp (5) are connected adjacent to the hinge (11) in a form-fitting manner by means of a projection (15) engaging in an engagement window (16).

2. A filter mechanism as claimed in claim 1, characterised in that the projection (15) is arranged at the clip (4) and the engagement window (16) is arranged at the tightening clip (5).

3. A filter mechanism as claimed in claim 2, characterised in that the hinge (11) is closer to the end of the tightening clip (5) than the projection (15).

4. A filter mechanism as claimed in any one of claims 1 to 3, characterised in that the hinge (11) has a larger bearing clearance in the circumferential direction than the projection (15) engaging into the engagement window (16).

5. A filter mechanism as claimed in any one of claims 1 to 3, characterized in that the hinge (11) comprises a hinge pin (12) at the tightening clip (5), wherein the pin longitudinal axis (14) runs orthogonally to the circumferential direction.

6. A filter mechanism as claimed in claim 5, characterized in that an engagement window (16) incorporated in the clamping bracket (5) is arranged at a distance from the longitudinal axis (14) of the pin.

7. A filter mechanism as claimed in any one of claims 1 to 3, characterised in that the tightening clamp (5) has tightening means (7) at the end opposite the hinge (11).

8. A filter unit according to any one of claims 1 to 3, characterised in that the protrusions (15) have a triangular cross-sectional shape.

9. A filter mechanism as claimed in any one of claims 1 to 3, c h a r a c t e r i z e d in that the hinge (11) comprises at least one hinge pin (12) and at least one recess (13), into which the hinge pin (12) extends.

10. A filter mechanism as claimed in claim 9, wherein the recess (13) has an elongated shape extending in the circumferential direction.

11. A filter mechanism as claimed in claim 1, wherein the filter mechanism is for liquid filtration.

12. A filter mechanism as claimed in any one of claims 1 to 3, characterized in that the hinge (11) comprises two hinge pins (12) at the tightening clamp (5), wherein the pin longitudinal axis (14) runs orthogonally to the circumferential direction.