Disc brake comprising a vibration damping device with an additional mass, and kit with such a disc brake

Abstract

A disk brake, in particular for a vehicle, comprising a brake lining arrangement with a friction lining and a pad back plate. The friction lining can interact with a brake disk in order to achieve a braking effect. The disc brake also comprises a vibration damping device which is arranged on a brake caliper or on a brake support, comprising at least one additional mass which is designed as a separate component. The vibration damping device further comprises a receiving pin which is secured to the brake caliper or to the brake support and via which the additional mass can be fixed to the brake caliper or to the brake support.

Claims

1. A disc brake for a vehicle comprising: at least one vibration-damping device with at least one additional mass arranged on a brake caliper or on a brake carrier, wherein the at least one additional mass is embodied as a separate component and the at least one vibration-damping device further comprises a locating bolt fastened to the brake caliper or to the brake carrier by means of which the at least one additional mass is configured to be fixed to the brake caliper or to the brake carrier, wherein the locating bolt is elongate and has on a lateral surface a groove structure aligned in a longitudinal direction and/or transverse to the longitudinal direction, wherein the at least one additional mass is configured to be fixed by pressing to the locating bolt such that the groove structure engages in a surface of the at least one additional mass, wherein an annular groove is embodied in the locating bolt at an end facing away from the brake caliper or the brake carrier in which a circlip engages around the locating bolt such that the circlip prevents the at least one additional mass from detaching from the locating bolt.

2. The disc brake as set forth in claim 1, wherein the locating bolt engages with a recess embodied in the at least one additional mass.

3. The disc brake as set forth in claim 1, wherein a first thread is embodied on a part of the locating bolt facing toward the brake caliper or the brake carrier, the thread being securely connected to the brake caliper or the brake carrier by means of a second thread embodied on the brake caliper or on the brake carrier that is complementary to the first thread.

4. The disc brake as set forth in claim 1, wherein the locating bolt and/or the at least one additional mass is substantially cylindrical.

5. The disc brake as set forth in claim 1, wherein the at least one additional mass has a base portion in the form of a flat fastening tab and a block portion, the block portion having a greater mass than the base portion and the fastening tab lying flat against the brake caliper or the brake carrier.

6. The disc brake as set forth in claim 5, wherein the locating bolt engages with a recess embodied in the at least one additional mass, the recess being embodied as a core hole bore in the at least one additional mass in the region of the base portion.

7. The disc brake as set forth in claim 1, wherein the at least one additional mass includes a plurality of additional masses configured to be fixed at different receiving points to the brake caliper or to the brake carrier by means of substantially equivalent locating bolts including the locating bolt, wherein at least two of the plurality of additional masses are arranged on opposite sides of the brake caliper or brake carrier with respect to a brake disc.

8. The disc brake as set forth in claim 7, wherein at least two of the plurality of additional masses have different masses and/or block portions are aligned differently with respect to the base portions.

9. The disc brake as set forth in claim 5, wherein a respective groove structure is embodied on the base portion or base portions that engages in a surface of the brake caliper or of the brake carrier.

10. The disc brake as set forth in claim 7, wherein at least two of the plurality of additional masses are configured to be fixed by means of the same locating bolt at the same receiving point to the brake caliper or to the brake carrier.

11. The disc brake as set forth in claim 7, wherein at least one of the plurality of additional masses is made of a material having a greater density and/or elasticity than the material of which the brake caliper or brake carrier is made in the vicinity of the respective receiving point.

12. The disc brake as set forth in claim 1, wherein the disc brake is embodied as a fixed-caliper disc brake, wherein the at least one vibration-damping device is arranged on the brake caliper.

13. A kit comprising a disc brake as set forth in claim 1, wherein commensurately dimensioned one or more further additional masses are configured to optionally be put in place according to different vibration frequencies to be dampened by the at least one vibration-damping device.

14. The disc brake as set forth in claim 5, wherein the disc brake is embodied as a fixed-caliper disc brake, wherein the at least one vibration-damping device is arranged on the brake caliper.

15. The disc brake as set forth in claim 5, wherein the disc brake is embodied as a floating-caliper disc brake, wherein the brake caliper is displaceably mounted on the brake carrier.

16. A kit comprising a disc brake as set forth in claim 5, wherein commensurately dimensioned further additional masses are configured to optionally be put in place according to different vibration frequencies to be dampened by the at least one vibration-damping device.

17. A disc brake for a vehicle comprising: at least one vibration-damping device with at least one additional mass arranged on a brake caliper or on a brake carrier, wherein the at least one additional mass is embodied as a separate component and the at least one vibration-damping device further comprises a locating bolt fastened to the brake caliper or to the brake carrier by means of which the at least one additional mass is configured to be fixed to the brake caliper or to the brake carrier, wherein the locating bolt is elongate and has on a lateral surface a groove structure aligned in a longitudinal direction and/or transverse to the longitudinal direction, wherein the at least one additional mass is configured to be fixed by pressing onto the locating bolt such that the groove structure engages in an inner circumferential surface of the at least one additional mass, wherein the disc brake is embodied as a floating-caliper disc brake, wherein the brake caliper is displaceably mounted on the brake carrier, wherein the locating bolt is a guide screw of a guide mechanism of the brake caliper that is extended beyond a surface of the brake caliper.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a perspective overview of a first embodiment of a disc brake according to the invention, the vibration-damping device being shown in the mounted state;

(2) FIGS. 2a-2c show detailed views of the vibration-damping device from FIG. 1 as exploded drawings, with three variants of the locating bolt being shown;

(3) FIG. 3 shows a perspective detailed view of the vibration-damping device from FIG. 1;

(4) FIG. 4 shows a perspective overview of a second embodiment of a disc brake according to the invention, in which two additional masses fixed to two receiving points are shown;

(5) FIG. 5 shows a perspective overview of the disc brake from FIG. 4, in which the two additional masses are aligned in opposite directions;

(6) FIG. 6 shows a perspective overview of a third embodiment of a disc brake according to the invention, in which two additional masses are fixed to one receiving point and one additional mass is fixed to another receiving point;

(7) FIG. 7 shows a perspective overview of a fourth embodiment of a disc brake according to the invention, in which one respective additional mass is fixed to two different receiving points and two additional masses are fixed to one receiving point;

(8) FIG. 8 shows a perspective overview of a fifth embodiment of a disc brake according to the invention, in which one respective additional mass is fixed to three receiving points; and

(9) FIGS. 9 to 11 show different views of differently dimensioned additional masses.

DETAILED DESCRIPTION OF THE INVENTION

(10) FIG. 1 shows a perspective overview of a first embodiment of a disc brake 10 according to the invention. The disc brake 10 comprises a brake pad assembly (not shown) with a friction pad (not shown) and a pad back plate (not shown), the friction pad being engageable with a brake disc in order to achieve a braking effect. A brake caliper 11 engaging around the brake disc is fastened by means of a locating bolt 18 passing through an arm 13 of the brake caliper 11 to a guide screw 17 of a guide mechanism 31 and, by means thereof, to a brake carrier 12, so as to be displaceable in the longitudinal direction of the guide screw 17. The locating bolt 18 is part of a vibration-damping device 14, which also has a cylindrical additional mass 16 embodied as a separate component that is mounted on a part of the locating bolt facing away from the brake caliper. The additional mass 16 is thus fixed by means of the locating bolt 18 to the brake caliper 11 (cf. FIGS. 2a to 2c). The locating bolt 18 engages with a recess 20 embodied in the additional mass 16 that extends in the longitudinal direction L of the additional mass 16 through the entire additional mass 16. On an end surface 21 that is distant from the brake caliper 11, the recess 20 has a smaller diameter than on the interior of the cylinder.

(11) A first thread (not shown) is embodied on a part 22 of the locating bolt 18 facing toward the brake caliper 11. A second thread complementary to the first thread is embodied in the (hexagon) head of the guide screw 17, and the two threads engage in one another, whereby the locating bolt 18 is securely connected to the guide screw 17 and hence to the brake caliper 11. Alternatively, the second thread can be embodied directly in the brake caliper 11, for example in the arm 13, whereby the locating bolt 18 can be screwed into the brake caliper 11. During mounting, the first thread on the facing part 11 is screwed into the head of the guide screw 17 by means of a tool holding fixture 23, here in the form of an external hex, in a tool receiving region of the locating bolt 18. A disc 25 is arranged on the locating bolt 18 adjacent to the tool holding fixture 23 that lies flush with a surface of the arm 13 of the brake caliper 11 after mounting. In the mounted state, the locating bolt 18 thus corresponds to an extension of the guide screw 17 of the guide mechanism 31 of the brake caliper 11 beyond the arm 13 of the brake caliper 11. The locating bolt 18 and the additional mass 16 are also substantially cylindrical according to the symmetry of the guide screw 17. The guide mechanism 31 is protected in portions by a bellows 35 made of rubber.

(12) FIGS. 2a to 2c show three variants of the vibration-damping device 14, the locating bolt 18 being a part of the first one. In addition to the locating bolt 18, two modifications of the locating bolt are shown, which are designated as locating bolt 24 and locating bolt 26 (cf. FIGS. 2b and 2c). As can be seen from FIGS. 2a to 2c, all of the locating bolts 18, 24, 26 are elongate, and each has on its lateral surfaces 28 a groove structure 30 aligned transverse to its longitudinal direction L. The two modified locating bolts 24, 26 also have all of the features of the locating bolt 18. Moreover, according to the invention, any features of the locating bolts 18, 24, 26 can be combined.

(13) During assembly, each of the additional masses 16 is pressed together with the respective locating bolts 18, 24, 26. The additional mass 16 pressed onto the locating bolt 18 is shown in FIGS. 1 and 3. As a result of the pressing, groove structures, for example the groove structure 30, embodied on the locating bolt 18, 24, 26 engage in a surface of the additional mass, which is an inner circumferential surface in this case. For this purpose, in addition to the groove structure 30 arranged transverse to the longitudinal direction L, the locating bolt 18 according to the first modification also has a groove structure 32 arranged in the longitudinal direction L that extends in the circumferential direction along the entire circumference of the locating bolt 18. The grooves run parallel to one another. The locating bolt 26 according to the second modification differs from the locating bolt 18 in that an annular groove 34 is embodied on an end facing away from the brake caliper 11. A circlip 36 engages around the locating bolt 26 such that the additional mass 16 is effectively prevented from detaching from the locating bolt 26.

(14) A disc brake 38 according to a second embodiment of the invention shown in FIGS. 4 and 5 differs from the disc brake 10 in that, instead of the vibration-damping device 14, a vibration-damping device 40 is respectively arranged at a first and at a second receiving point 52, 54. These receiving points 52, 54 are arranged on two different arms 13, 33 of the brake caliper 11. The vibration-damping device 40 can have all of the features of the vibration-damping device 14 individually or in combination. In the vibration-damping device 40 shown in the figures, a screw 42 is used to fasten additional masses 44 instead of the locating bolt 18, the screw 42 being embodied here as a machine screw (external hex). It is also conceivable, in particular, to use one of the previously described locating bolts 18, 24, 26 instead of the screw 42.

(15) Each of the additional masses 44 has a base portion 46 in the form of a flat fastening tab and a block portion 48. The additional mass 44 is shown in detail in FIGS. 9a to 9d and described in conjunction with these figures. In the assembled state shown in the figures, the additional masses 44 are braced with their base portions 36 between the arm 13 of the brake caliper 11 and the head of the screw 42. The block portion 48 has a greater mass than the base portion 46, and the fastening tab is positioned so as to lie flatly against the arm 13 of the brake caliper 11. In FIG. 4, the additional masses 44 are aligned such that the two block portions 48 and the base portions 46 are aligned opposite one another in both additional masses 44. In the exemplary embodiment shown in FIG. 4, the block portions 48 of the additional masses 44 thus extend in the circumferential direction of the disc brake and in the circumferential direction of the brake disc to be braked. Alternatively, the additional masses 44 can also be aligned perpendicular to this circumferential direction, for example, as shown in FIG. 5.

(16) A third embodiment of a disc brake 50 according to the invention shown in FIG. 6 differs from the disc brake 38 in that two additional masses 44 are arranged at the receiving point 53 that are aligned to as to be perpendicular to one another. An additional mass 44 arranged at the second receiving point 54 is aligned in another, different direction in which none of the additional masses 44 at the first receiving point is aligned. Here, too, the receiving points and the screws 42 (i.e., locating bolts) are each arranged on a guide screw of the guide mechanism 31 of the disc brake. To align the additional masses 44, projections (not shown in the figures) can optionally be embodied on the brake caliper 11 or on the brake carrier 12 on which the block portions 48 are supported such that the additional mass is prevented from rotatingi.e., the block portions 48 are prevented from rotating around the base portions 46.

(17) The term alignment is used here to refer to the orientation of the additional mass 44, i.e., the direction in which the block portions 48 extend from the base portions 46. For purposes of illustration, a direction vector R is shown in FIG. 6 that makes the alignment of one of the additional masses 44 arranged at the receiving point 52 clear. Since the base portions 46 rest directly against the brake caliper 11 at least in portions, groove structures (not shown) on the surfaces of the base portions 46 can be engaged in a surface of the brake caliper 11.

(18) A fourth embodiment of a disc brake 58 according to the invention shown in FIG. 7 differs from the disc brake 50 in that a third vibration-damping device 40 is additionally arranged at a third receiving point 60 on the same side of the brake caliper 11 as the first receiving point 52 and the second receiving point 54. Unlike the receiving points 52 and 54, the receiving point 60 is not arranged on a guide screw 17 of the guide mechanism 31 of the brake caliper 11, but rather as a separate receiving point 60 spaced apart from the guide mechanism 31. In the example shown, the third receiving point 60 is the third clamping point of the disc brake. Alternatively, however, it can be embodied specifically for fastening a vibration-damping device.

(19) Moreover, the disc brake 58 has all of the features of the disc brake 50.

(20) A fifth embodiment of a disc brake 62 according to the invention shown in FIG. 8 differs from the disc brake 50 in that a fourth receiving point 64 is arranged on one of the guide screws 17 of the guide mechanism 31 on a side opposite the side of the brake caliper 11 on which the first and second receiving points 52, 54 are arranged. Moreover, the disc brake 62 has all of the features of the disc brake 58.

(21) The disc brakes 10, 38, 50, 58 and 62 are shown as floating-caliper disc brakes.

(22) Alternatively, however, they can also be embodied as fixed-caliper disc brakes.

(23) FIGS. 9 to 11 show the additional mass 44 in various side views and in a cross-sectional view (FIG. 9c) along the sectional plane A designated in FIG. 9a, as well as two modified additional masses 66, 68. The additional masses 66 and 68 differ from the additional mass 44 in that their block portion 48 is respectively smaller and larger than that of the additional mass 44. The block portions 48 of the three additional masses 44, 66, 68 are made of the same material. The base portions 46 of the three depicted variants of the additional masses 44, 66, 68 have substantially the same shape. In the figures, a thickness d3 of the block portion 48 of the additional mass 68 is greater than the thickness d2 of the additional mass 66 and smaller than the thickness d1 of the block portion 48 of the additional mass 44. Consequently, the additional mass 68 is heavier than the additional mass 66 but lighter than the additional mass 44. For example, the additional mass 44 can weigh 80 grams, the additional mass 68 can weight 50 grams and the additional mass 66 can weigh 35 grams.

(24) The additional masses 16, 44, 66, 68 are preferably made from metal using a cold- or hot-shaping process. Alternatively, they can be manufactured by sintering or casting. The block portion 48 can be made of a different material than the base portion 46. In particular, the block portion 48 can be made of a material with a greater density than the base portion 46. Examples of materials that merit consideration are plastic for the base portion 46 and metal for the block portion 48. In an embodiment not shown in the figures, the base portion can extend into the block portion or pass completely through the block portion, thus dividing the latter into two regions. Particularly vibrations of the additional masses in the direction of the thickness d can be effectively damped in this way. If the block portion 48 is made of a different material than the base portion 46, the two portions 46, 48 can be screwed, caulked or welded to one another. Alternatively, the two portions 46, 48 can be joined together by a common plastic jacket.

(25) According to the invention, a kit with one of the disc brakes 10, 38, 50, 58 and 62 has various additional masses, for example several additional masses 16, 44, 66 and 68. Moreover, the kit can also have various locating bolts 60 and differently dimensioned screws 42 for mounting the additional masses. As a result, the user can flexibly choose which additional masses are used for optimal vibration damping.

(26) It is thus possible to set different mass distributions on the brake caliper/brake carrier in a quick and uncomplicated manner using simple, universally applicable components of the disc brake, particularly standardized locating bolts and additional masses. In this way, the propagation of friction-induced oscillations to the brake caliper/brake carrier is effectively suppressed and the emission of undesired noises to the environment prevented.

(27) In accordance with the provisions of the patent statutes, the principle and mode of operation of this invention have been explained and illustrated in its preferred embodiments. However, it must be understood that this invention may be practiced otherwise than as specifically explained and illustrated without departing from its spirit or scope.