Brake Dust Particle Filter with a Filter Insert

Abstract

A brake dust particle filter for a disc brake assembly is provided with a housing that has a first housing side wall, a second housing side wall, and a housing circumferential wall, wherein the housing circumferential wall extends between the first housing side wall and the second housing side wall. A filter insert with a filter medium is arranged in the housing and extends along one of the first and second housing side walls and along the housing circumferential wall. The filter insert has a curved circumferential edge. The housing has a curved receiving groove. The curved circumferential edge engages the curved receiving groove. The filter insert is L-shaped and is configured to at least partially cover a friction surface and a circumferential surface of a brake disc of the disc brake assembly. The curved circumferential edge of the filter insert projects past the filter medium.

Claims

1. A brake dust particle filter for a disc brake assembly, the brake dust particle filter comprising: a housing comprising a first housing side wall, a second housing side wall, and a housing circumferential wall, wherein the housing circumferential wall extends between the first housing side wall and the second housing side wall; a filter insert comprising a filter medium, wherein the filter insert is arranged in the housing and extends along one of the first and second housing side walls and along the housing circumferential wall; wherein the filter insert comprises a curved circumferential edge; wherein the housing comprises a curved receiving groove; wherein the curved circumferential edge engages the curved receiving groove.

2. The brake dust particle filter according to claim 1, further comprising a rope seal arranged in the curved receiving groove, wherein the rope seal is configured to be compressed by the curved circumferential edge.

3. The brake dust particle filter according to claim 2, wherein the rope seal contains ceramic fibers and/or glass fibers.

4. The brake dust particle filter according to claim 1, wherein the curved receiving groove and the curved circumferential edge engaging the curved receiving groove form a labyrinth seal.

5. The brake dust particle filter according to claim 1, wherein the housing is of a two-part configuration comprised of a first housing part and a second housing part, wherein the first housing side wall is formed at the first housing part, and wherein the second housing side wall is formed at the second housing part.

6. The brake dust particle filter according to claim 5, wherein the first housing part comprises a fastening device configured to fasten the brake dust particle filter at a vehicle structure.

7. The brake dust particle filter according to claim 5, wherein the first housing part forms at least partially a splash guard of the disc brake assembly.

8. The brake dust particle filter according to claim 5, wherein the curved receiving groove is formed in the first housing part.

9. The brake dust particle filter according to claim 5, wherein the first housing part and the second housing part are detachably connected to each other.

10. The brake dust particle filter according to claim 9, wherein the first housing part comprises axial fastening projections, wherein the filter insert and the second housing part are configured to be fastened to the axial fastening projections.

11. The brake dust particle filter according to claim 10, wherein the axial fastening projections are embodied as one piece together with the first housing part.

12. The brake dust particle filter according to claim 10, wherein the axial fastening projections are configured to be screwed onto the first housing part.

13. The brake dust particle filter according to claim 10, wherein the filter insert and the second housing part are configured to be clamped in an axial direction against the first housing part.

14. The brake dust particle filter according to claim 10, wherein the filter insert and the second housing part are configured to be clamped in a radial direction against the first housing part.

15. The brake dust particle filter according to claim 14, wherein the filter insert and the second housing part are configured to be clamped in a radial direction against the axial fastening projections.

16. The brake dust particle filter according to claim 10, wherein the filter insert and the second housing part are configured to be screwed to each other radially and/or axially from an exterior of the housing.

17. The brake dust particle filter according to claim 16, further comprising screws passing through the second housing part and through the filter insert and engaging counter threads of the axial fastening projections.

18. The brake dust particle filter according to claim 16, wherein the filter insert comprises a circumferential wall and a side wall, wherein the circumferential wall and/or the side wall comprises at least one bore arranged to correspond with a positioning of the counter threads of the axial fastening projections.

19. The brake dust particle filter according to claim 1, wherein the curved circumferential edge dips in an axial direction into the curved receiving groove.

20. The brake dust particle filter according to claim 1, wherein the filter insert comprises an insert part comprising a side wall and a circumferential wall, wherein the side wall and/or the circumferential wall comprises at least one opening covered by the filter medium.

21. The brake dust particle filter according to claim 20, wherein the filter medium is welded to the insert part.

22. The brake dust particle filter according to claim 21, wherein the filter medium is welded to a rim of the at least one opening covered by the filter medium.

23. The brake dust particle filter according to claim 1, wherein the filter medium comprises a pleated bellows.

24. The brake dust particle filter according to claim 1, wherein the housing circumferential wall comprises one flow opening or a plurality of flow openings spaced apart from each other in a circumferential direction of the housing.

25. A disc brake assembly comprising a brake disc, a brake caliper, and a brake dust particle filter according to claim 1.

26. A filter insert for a brake dust particle filter of a disc brake assembly, wherein the filter insert is L-shaped and comprises a filter medium, wherein the filter insert is configured to at least partially cover a friction surface and a circumferential surface of a brake disc of the disc brake assembly, and wherein the filter insert comprises a curved circumferential edge projecting past the filter medium.

27. The filter insert according to claim 26, wherein the curved circumferential edge projects axially past the filter medium.

28. The filter insert according to claim 26, further comprising an insert part, wherein the filter medium is held non-detachably at the insert part.

29. The filter insert according to claim 28, wherein the curved circumferential edge is formed at the insert part.

30. A method of filtering brake dust with a brake dust particle filter of a disc brake assembly, the method comprising: using a filter insert according to claim 26 in the brake dust particle filter.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Further features and advantages of the invention result from the following detailed description of embodiments of the invention, from the claims as well as with the aid of the Figures of the drawing showing details according to the invention. The afore mentioned and still further explained features can be realized each individually by themselves or several combined in any expedient combinations realized in variants of the invention. The features disclosed in the drawing are illustrated such that the particularities according to the invention can be made clearly visible.

[0043] FIG. 1 shows a disc brake assembly according to the invention with a brake disc, a brake caliper, and a brake dust particle filter according to the invention in a schematic perspective view.

[0044] FIG. 2 shows the brake dust particle filter of the disc brake assembly of FIG. 1 comprising two housing parts and a filter insert according to the invention in a schematic exploded illustration.

[0045] FIG. 3 shows the brake dust particle filter of FIG. 2 in a schematic view with a view radial in relation to an axis of rotation of the brake disc.

[0046] FIG. 4 shows the brake dust particle filter of FIG. 2 in a schematic section view with section direction perpendicular to the axis of rotation of the brake disc.

[0047] FIG. 5 shows the brake dust particle filter of FIG. 2 in a schematic section view, with section direction parallel to the axis of rotation of the brake disc.

[0048] FIG. 6 shows an enlarged schematic illustration of the engagement of a circumferential edge of the filter insert of the brake dust particle filter of FIG. 2 in a circumferential groove of the housing, wherein a ceramic rope seal is arranged in the circumferential groove.

[0049] FIG. 7 shows a schematic exploded illustration of a further embodiment of a brake dust particle filter according to the invention with a multi-part housing and a filter insert according to the invention.

[0050] FIG. 8 shows the brake dust particle filter of FIG. 7 in a schematic section view with section direction parallel to the axis of rotation of a brake disc.

[0051] FIG. 9 shows an enlarged schematic illustration of detail Y of FIG. 8, wherein a circumferential groove of the housing and a projecting circumferential edge of the filter insert form a labyrinth seal.

DESCRIPTION OF PREFERRED EMBODIMENTS

[0052] FIG. 1 shows a disc brake assembly 10. The disc brake assembly 10 comprises a brake disc 12 and a brake caliper 14. Here, the brake disc 12 is an internally ventilated brake disc. The brake caliper 14 can be held at a brake caliper holder 16. The disc brake assembly 10 comprises moreover a brake dust particle filter 18. The brake dust particle filter 18 is arranged downstream of the brake caliper 16 in rotational direction 20 of the brake disc 12 (for forward travel of a vehicle with the disc brake assembly 10). A housing 22 of the brake dust particle filter 18 covers partially the two friction surfaces 24 as well as a circumferential surface 26 of the brake disc 12. The housing 22 is arranged immediately adjoining the brake caliper 14.

[0053] FIG. 2 shows the brake dust particle filter 18 in an exploded illustration. The housing 22 comprises a first housing part 28 and a second housing part 30. At the first housing part 28, a first housing side wall 32 is formed. At the second housing part 30, a second housing side wall 34 is formed. A housing circumferential wall 36 extends in the mounted state from the first housing side wall 32 to the second housing side wall 34. Here, the housing circumferential wall 36 is formed at the second housing part 30 as one piece together with the second housing side wall 34. The housing side walls 32, 34 and the housing circumferential wall 36 define an interior for partially receiving the brake disc 12.

[0054] For fastening the brake dust particle filter 18 at a vehicle, a fastening device 38 is provided. Here, the fastening device 38 comprises two cutouts 40 for screwing the brake dust particle filter 18 to the vehicle. The fastening device 38 is presently embodied at the first housing part 28. In the mounted state, the first housing part 28 with the first housing side wall 32 is located at the side of the brake disc 12 which is facing the vehicle; the second housing part 30 with the second housing side wall 34 is located correspondingly at the side of the brake disc 12 which is facing away from the vehicle.

[0055] The brake dust particle filter 18 comprises a filter insert 42. In the mounted state, the filter insert 42 is arranged in the housing 22. The filter insert 42 comprises an insert part 44 and a filter medium 46. The filter insert 42 is L-shaped. The insert part 44 comprises a side wall 48 and a circumferential wall 50. The side wall 48 and the circumferential wall 50 extend substantially perpendicularly to each other. In the mounted state, the side wall 48 is arranged at one of the friction surfaces 24 of the brake disc 12; the circumferential wall 50 adjoins the circumferential surface 26 of the brake disc 12. In the mounted state, the filter insert 42 or its side wall 48 and the circumferential wall 50 are arranged between the brake disc 12 and the housing 22, here the second housing part 30, concretely the second housing side wall 34 and the housing circumferential wall 36.

[0056] Here, the side wall 48 and the circumferential wall 50 of the insert part 44 each comprise an opening 52, 54. The openings 52, 54 are covered by the filter medium 46. In operation of the brake dust particle filter 18, air flows, coming from the brake disc 12, through the openings 52, 54, wherein entrained brake dust particles are retained in the filter medium 46. The filtered air can exit through a plurality of flow openings 56 from the housing 22, compare FIG. 3. The flow openings 56 are spaced apart form each other here in circumferential direction. The flow openings 56 can be embodied in the housing circumferential wall 36.

[0057] The filter medium 46 comprises here two spaced apart filter parts, compare FIGS. 4 and 5. The two filter parts each are embodied as a pleated (multi-folded) bellows. The filter medium 46 is non-detachably fastened to the insert part 44. The filter medium 46 or the two filter parts can be welded to the insert part 44, in particular circumferentially about the openings 52, 54.

[0058] FIG. 5 shows that a curved circumferential edge 58 of the filter insert 42 engages a curved receiving groove 60 of the housing 22. The receiving groove 60 and its curved course can be seen also in FIG. 2. The circumferential edge 58 and the receiving groove 60 can extend at least in sections concentrically to an axis of rotation of the brake disc 12.

[0059] The curved circumferential edge 58 is formed at the free end of the circumferential wall 50 of the filter insert 42. Presently, an axial end section of the insert part 44 forms the circumferential edge 58. The circumferential edge 58 projects past the filter medium 46. The circumferential edge 58 projects here in axial direction past the filter medium 46.

[0060] The receiving groove 60 is presently embodied at the first housing part 28. Here, the receiving groove 60 is located at the radial outer end of the first housing side wall 32. The receiving groove 60 is open toward the second housing side wall 34. The circumferential edge 58 projects in axial direction into the receiving groove 60.

[0061] A rope seal 61 can be compressed in the receiving groove 60 between the circumferential edge 58 of the filter insert 42 and the housing 22, see FIG. 6. The rope seal 61 can comprise ceramic fibers, in particular be comprised of ceramic fibers. Alternatively, the rope seal can comprise glass fibers, in particular be comprised of glass fibers. Presently, the rope seal 61 is embodied as a hollow cord with a central cutout. Alternatively, the rope seal can be a solid rope with massive cross section (not illustrated in detail). In relation to the cross section of the rope seal 61, the circumferential edge 58 can press centrally onto the rope seal 61. The circumferential edge 58 dips correspondingly centrally into the receiving groove 60.

[0062] The two housing parts 28, 30 and the filter insert 42 are detachably fastened at each other, compare in particular FIG. 2. The filter insert 42 can be screwed radially from the interior to the second housing part 30 by screws 62. The screws 62 can pass through bores in the second housing part 30 and engage threaded sections of the insert part 44.

[0063] The first housing part 28 comprises fastening projections 64. The fastening projections 64 extend away from the first housing side wall 32 in axial direction. The fastening projections 64 are embodied here as one piece together with the first housing part 28.

[0064] The filter insert 42 which is pre-mounted at the second housing part 30 can be pushed onto the fastening projections 64. In doing so, the circumferential edge 58 engages the receiving groove 60. The housing part 30 and the filter insert 42 comprise bores through which screws 66 can be inserted radially from the exterior. The screws 66 engage threaded sections in the fastening projections 64. The filter insert 42 and the second housing part 30 can thus be pressed in radial direction against the first housing part 28, in particular its fastening projections 64.

[0065] FIGS. 7, 8, and 9 show a further brake dust particle filter 68. The brake dust particle filter 68 corresponds in construction and function substantially to the afore described brake dust particle filter 18 illustrated in FIGS. 1 through 6. In the following, primarily the differences will be described. In other respects, reference is being had to the preceding description.

[0066] In the brake dust particle filter 68, an insert part 44 of a filter insert 42 is provided with a plurality of openings 52 in its side wall 48 which are covered by a filter medium 46, compare in particular FIG. 7. Openings 54 in a circumferential wall of the filter insert 42 are also covered by the filter medium 46.

[0067] The filter medium 46 is embodied here as one piece, see FIG. 8. The two legs of its L-shape pass into each other in the region of the transition from the side wall 48 into the circumferential wall 50 of the insert part 44.

[0068] The side wall 48 projects here also in axial direction past the filter medium 46, compare FIGS. 8 and 9. The projection forms a curved circumferential edge 58 at the free end of the side wall 48. The circumferential edge 58 engages a receiving groove 60 at the first housing side wall 32, which groove is open toward a second housing side wall 34. In this way, a labyrinth seal between a first housing part 28 and the filter insert 42 is provided.

[0069] In the brake dust particle filter 68, fastening projections 70 in the form of stud bolts can be screwed onto the first housing part 28, compare FIG. 7. The filter insert 42 comprises receiving regions for the fastening projections 70. The filter insert 42, which is pre-mounted, for example, by means of screws 62 at a second housing part 30, can be pushed in axial direction onto the stud bolts which are fastened at the first housing part 28. The circumferential edge 58 then engages the receiving groove 60. For detachable fastening of the two housing parts 28, 30 and of the filter insert 42 at each other, screws 72 can be screwed in axial direction into the fastening projections 70. The screws 72 can pass through bores in the second housing part 30 and in the side wall 48 of the filter insert 42 and engage threaded sections in the fastening projections 70. In this way, the two housing parts 28, 30 and the filter insert 42 can be pressed against each other in axial direction.

[0070] At the housing 22, in particular at the second housing side wall 34 which is facing toward an exterior side of the vehicle, a decorative plate 74 can be attached, compare in particular FIG. 7. The decorative plate 74 and the housing 22 can have different colors.

LIST OF REFERENCE CHARACTERS

[0071] disc brake assembly 10 [0072] brake disc 12 [0073] brake caliper 14 [0074] brake caliper holder 16 [0075] brake dust particle filter 18, 68 [0076] direction of rotation 20 [0077] housing 22 [0078] friction surfaces 24 [0079] circumferential surface 26 [0080] first housing part 28 [0081] second housing part 30 [0082] first housing side wall 32 [0083] second housing side wall 34 [0084] housing circumferential wall 36 [0085] fastening device 38 [0086] cutouts 40 [0087] filter insert 42 [0088] insert part 44 [0089] filter medium 46 [0090] side wall 48 [0091] circumferential wall 50 [0092] opening 52, 54 [0093] flow openings 56 [0094] circumferential edge 58 [0095] receiving groove 60 [0096] rope seal 61 [0097] screws 62, 66, 72 [0098] fastening projections 64, 70 [0099] decorative plate 74