SEGMENTAL BEARING DEVICE COMPRISING AN INTERFERENCE REGION, AND SWIVEL LEVEL ARRANGEMENT COMPRISING THE SEGMENTAL BEARING DEVICE

Abstract

A segmental bearing device includes a plurality of rolling elements, a segmental cage for receiving the plurality of rolling elements, and a partial shell. The segmental cage has a first end region and a first interference region disposed in the first end region. The partial shell has a bearing race for the plurality of rolling elements, and first and second axial guide flanges for axially guiding the segmental cage. The first interference region lies against the first axial guide flange, axially clamping the segmental cage. The segmental cage may also include a second end region, axially opposite the first end region, and a second interference region disposed in the second end region. The second interference region lies against the second axial guide flange, axially clamping the segmental cage.

Claims

1. A segmental bearing device for mounting a first bearing partner relative to a second bearing partner about a swivel axis (S), comprising: a plurality of rolling elements, a segmental cage for receiving the rolling elements, a partial shell, wherein: the partial shell provides a bearing race for the rolling elements and axial guide flanges for axially guiding the segmental cage, the segmental cage has at least one interference region so that the segmental cage lies against the axial guide flange in the axial direction in a clamping manner, and the at least one interference region is disposed in an end region of the segmental cage.

2. The segmental bearing device of claim 1, wherein an interference region is disposed at the end region on each axial side.

3. The segmental bearing device of claim 2, wherein an interference region is disposed at each end region on each axial side.

4. The segmental bearing device of claim 3, wherein: such an interference region is disposed on at least one axial side at each end region, an intermediate region is disposed on the same axial side between the two end regions with an interference region, and the intermediate region is set back relative to the end regions in the axial direction or has play relative to the axial guide flange.

5. The segmental bearing device of claim 4, wherein the intermediate region has at least 80%, of a total length along a circumference of the segmental cage.

6. The segmental bearing device of claim 1, wherein: the segmental cage has a side ring region, the side ring region in the end region has a side ring portion designed to be resilient in the axial direction, and the interference region is disposed on the side ring portion.

7. The segmental bearing device of claim 6, wherein: the side ring region has a slit which runs in the circumferential direction and is open on one side, and the side ring portion is divided by the slit, so that the side ring portion is designed to be elastically resilient in the direction of the slit or in the axial direction.

8. The segmental bearing device of claim 7, wherein: the segmental cage has an end web, and wherein the side ring portion or the slit is or are disposed in an intersection region between the side ring region and the end web.

9. The segmental bearing device of claim 1, wherein the interference region is designed as a ramp region.

10. A swivel lever arrangement for a disc brake comprising: a swivel lever as a first bearing partner, a counter-bearing portion as a second bearing partner, and a segmental bearing device, the segmental bearing device comprising: a segmental cage, and a plurality of rolling elements, wherein: the swivel lever is swivelably mounted in the counter-bearing portion via the segmental bearing device, and the segmental bearing device is designed according to claim 1.

11. A segmental bearing device comprising: a plurality of rolling elements; a segmental cage for receiving the plurality of rolling elements, the segmental cage comprising: a first end region; and a first interference region disposed in the first end region; and a partial shell comprising: a bearing race for the plurality of rolling elements; and first and second axial guide flanges for axially guiding the segmental cage, wherein the first interference region lies against the first axial guide flange, axially clamping the segmental cage.

12. The segmental bearing device of claim 11, wherein the segmental cage further comprises: a second end region, axially opposite the first end region; and a second interference region disposed in the second end region, wherein the second interference region lies against the second axial guide flange, axially clamping the segmental cage.

13. The segmental bearing device according to claim 12, wherein the segment cage further comprises: a third end region, circumferentially opposite the first end region; a third interference region disposed in the third end region; a fourth end region, axially opposite the third end region; and a fourth interference region disposed in the fourth end region wherein: the third interference region lies against the first axial guide flange, axially clamping the segmental cage; and the fourth interference region lies against the second axial guide flange, axially clamping the segmental cage.

14. The segmental bearing device of claim 13, wherein the segment cage further comprises: a first intermediate region disposed between the first end region and the third end region, the first intermediate region set back relative to the first interference region and the third interference region, with a first gap to the first axial guide flange; and a second intermediate region disposed between the second end region and the fourth end region, the second intermediate region set back relative to the second interference region and the fourth interference region, with a second gap to the second axial guide flange.

15. The segmental bearing device of claim 14, wherein: the first intermediate region extends along at least 80% of a total circumferential length of the segmental cage; and the second intermediate region extends along at least 80% of the total circumferential length of the segmental cage.

16. The segmental bearing device of claim 11, wherein: the segmental cage comprises a first side ring region, the first side ring region comprising a first side ring portion in the first end region that is axially resilient; and the first interference region is disposed on the first side ring portion.

17. The segmental bearing device of claim 16, wherein: the first side ring region comprises a first circumferential slit that is open on one side; and the first side ring portion is divided by the first circumferential slit to be elastically resilient in an axial direction.

18. The segmental bearing device of claim 17 wherein: the segmental cage further comprises: a first end web; and a first intersection region between the first side ring region and the first end web; and the first side ring portion or the first circumferential slit is disposed in the first intersection region.

19. The segmental bearing device of claim 11 wherein the first interference region is a first ramp region.

20. A swivel lever arrangement for a disc brake comprising: a swivel lever as a first bearing partner; a counter-bearing portion as a second bearing partner; and the segmental bearing device of claim 11, wherein the swivel lever is swivelably mounted in the counter-bearing portion via the segmental bearing device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Further features, advantages and effects of the disclosure result from the following description of an exemplary embodiment and the attached figures. In the figures:

[0029] FIG. 1 shows a schematic representation of a swivel lever arrangement as an exemplary embodiment;

[0030] FIG. 2 shows a schematic three-dimensional representation of the segmental bearing device; and

[0031] FIG. 3 shows a detail from FIG. 2 in a similar representation.

DETAILED DESCRIPTION

[0032] FIG. 1 shows, in a schematic lateral view, a swivel lever arrangement 1 for a disc brake 2, which is only shown as a block, for a utility vehicle as an exemplary embodiment. The swivel lever arrangement 1 has the function of deflecting a braking force B introduced by an actuator 3 and, if necessary, translating it and forwarding it as a translated braking force B′ in the direction of the brake shoes or brake pads.

[0033] The swivel lever arrangement 1 has a swivel lever 4 which is mounted in a brake caliper 5 in a manner swivelable via a swivel axis S. The swivel lever 4 has a free end 6a on which the actuator 3, for example designed as a hydraulic or pneumatic actuator 3, acts. The swivel lever 4 is swivelably mounted about the swivel axis S at a swivel end 6b. The swivel lever 4 is swivelably mounted relative to a counter-bearing portion 7 so that the swivel lever 4 forms a first bearing partner and the counter-bearing portion 7 forms a second bearing partner.

[0034] A segmental bearing device 8 is disposed between the swivel lever 4 and the counter-bearing portion 7, which has a segmental cage 9 and a plurality of rolling elements 10, wherein the rolling elements 10 are guided in the cage segment 9. The cage segment 9 extends about the swivel axis S in an angular range of less than 180 degrees. The counter-bearing portion 7 can form part of the brake caliper 5, wherein the translated braking force B′ is then forwarded via a region of the swivel lever 4 opposite the segmental bearing device 8, for example via a bridge. As an alternative to this, the counter-bearing portion 7 forms a pressure piece so that the translated braking force B′ is forwarded from the pressure piece in the direction of the brake shoes.

[0035] The segmental bearing device 8 has a partial shell 13 which is designed as a half-shell and which is disposed on the counter-bearing portion 7. The swivel lever 4 forms a first bearing race 11, and the partial shell 13 forms a second bearing race 12 for the rolling elements 10. The bearing races 11, 12 are, for example, an integral part of the swivel lever 4 or the partial shell 13. The rolling elements 10 may be made of metal to transmit the braking forces. For example, the rolling elements 10 may be designed as cylindrical rollers, e.g., as needles. On the other hand, the segmental cage 9 may be made of a plastic, since it only has to introduce and dissipate small forces.

[0036] FIG. 2 shows a three-dimensional representation of the segmental bearing device 8 in FIG. 1 in a radial plan view from the inside. It can be seen that the partial shell 13 is designed as a shaped sheet metal part. The partial shell 13 provides the second bearing race 12 for the rolling elements 10 on the inner circumference. The partial shell 13 provides the second bearing race 12 for more than 150° and less than 180° in the circumferential direction about the swivel axis S. Guide flanges 16a, b are provided for the segmental cage 9 on the axial sides, which extend over the entire course of the partial shell 13 in the circumferential direction. The guide flanges 16a, b are designed as shaped subregions of the partial shell 13. On the one end side of the partial shell 13 are stop members 17a, b, designed in this exemplary embodiment as integrally formed hooks, which form an end stop for the segmental cage 9. On the other side, the partial shell 13 is designed without a stop so that the segmental cage 9 can be mounted in the partial shell 13 in a simple manner. A lug portion 18, designed as a tab, is integrally formed on the side of the stop members 17a, b and is used for mounting the partial shell 13 and/or the segmental bearing device 8.

[0037] The segmental cage 9 is disposed in the partial shell 13. The segmental cage 9 extends in the circumferential direction over a subregion of the partial shell 13 so that it can be moved relative to the partial shell 13 in the circumferential direction about the swivel axis S. The segmental cage 9 is made of plastic and has a plurality of receptacles 20 for the rolling elements 10. The rolling elements 10 are disposed with full complements in the segmental cage 9 so that a high load-bearing capacity is achieved for the available space.

[0038] The segmental cage 9 has a side ring region 14a, b on each of the axial end sides. Intermediate webs 15, which delimit the receptacles 20 for the rolling elements 10 in the circumferential direction, extend between the side ring regions 14a, b. The segmental cage 9 has end webs 15a, b at the end sides in the circumferential direction, wherein end regions 19a, b run in the axial direction in the end webs 15a, b. The end webs 15a, b delimit the last receptacle 20 in the circumferential direction and are disposed parallel to the intermediate webs 15 in this exemplary embodiment.

[0039] The end region 19 a forms intersection regions 21a, b with the side ring regions 14a, b on the one side in the circumferential direction of the segmental cage 9. The end region 19b forms intersection regions 22a, b with the side ring regions 14a, b on the other side in the circumferential direction of the segmental cage 9.

[0040] The segmental cage 9 has interference regions 23a, b in the end region 19a, and the segmental cage 9 has interference regions 24a, b in the end region 19b. The interference regions 23a and 24a lie against the guide flange 16a in a clamping manner, and the interference regions 23b and 24b lie against the guide flange 16b in a clamping manner. The interference regions 23a, b and 24a, b have the function of fixing the segmental cage 9 in a clamping manner in the partial shell 13 as a transport and/or assembly securing means. The interference regions 23a, b and 24a, b each have an overdimension in relation to the guide flanges 16a, b. However, the overdimension is dimensioned such that the segmental cage 9 is disposed in the partial shell 13 during operation so as to be swivelable via the rolling elements 10.

[0041] The interference regions 23a, b and 24a, b are each disposed in the end regions 19a, b on the two axial sides of the segmental cage 9, such that they fix the segmental cage 9 centrally and/or straight in the partial shell 13.

[0042] Between the interference regions 23a and 24a on an axial side of the segmental cage 9, an intermediate region 29a is provided, which is set back in the axial direction relative to the interference regions 23a and 24a. This results in a distance between the segmental cage 9 and the guide board 16a in the intermediate region 29a. The segmental cage 9 is supported on the guide flange 16a via the interference regions 23a and 24a only at certain points. Between the interference regions 23b and 24b on the other axial side of the segmental cage 9, an intermediate region 29b is provided, which is set back in the axial direction relative to the interference regions 23b and 24b. This results in a distance between the segmental cage 9 and the guide flange 16b in the intermediate region 29b. The segmental cage 9 is supported on the guide flange 16b via the interference regions 23b and 24b only at certain points. The support at certain points supports the concept of forming a transport and/or assembly securing means, but leaving the segmental bearing device 8 swivelable for operation. As can be seen from FIG. 2, the intermediate region 29a, b occupies more than 80% or 90% of the circumferential length of the segmental cage 9 in each case.

[0043] The side ring regions 14a, b have a side ring portion 25a, b, 26a, b in each end region 19a, b and/or in each intersection region 21a, b, 22a, b, which side ring portion is designed in each case as a web protruding in the circumferential direction. In particular, the side ring portion 25a, b, 26a, b is divided in the side ring region 14a, b by a slit 27a, b, 28a, b, which runs in the circumferential direction and is open at the end. The slit 27a, b, 28a, b can also be referred to as a groove. The interference region 23a, b, 24a, b is disposed in each case on the side ring portion 25a, b, 26a, b, with the respective side ring portions 25a, b, 26a, b being elastically deflected inward in the axial direction due to the overdimension and thereby providing the clamping force against the guide flanges 16a, b.

[0044] The slits 27a, b, 28a, b and the side ring portions 25a, b, 26a, b are limited to the intersection regions 21a, b, 22a, b so that they do not weaken the segmental cage 9. In order to further reduce the weakening, the slits 27a, b, 28a, b or the side ring portions 25a, b, 26a, b in the present exemplary embodiment only extend to 50% of the intersection regions 21a, b, 22a, b in the circumferential direction.

[0045] FIG. 3 shows a schematic, three-dimensional representation of a detail, for example in the intersection region 22a; the other intersection regions 22b, 23a, b are realized analogously. On the one hand, it can be seen more clearly here that the guide flanges 16a, b are designed as beaded flanges, for example. It can also be seen that the interference region 24a is formed integrally in the segmental cage 9 or in the side ring portion 26a. The interference region 24a is indicated by a dashed line. The interference region 24a is designed as a ramp region, which has the greatest axial height at the free end of the side ring portion 26a and then drops in the direction of the intermediate region 29a. It can also be seen that the side ring portion 26a does not extend over the entire radial thickness of the segmental cage 9, but only assumes a part, here half, of the radial thickness of the segmental cage 9. In this way there is only slight clamping.

[0046] The segmental cage 9 is formed symmetrically with elements realized as interference regions 23a, b, 24a, b, via which the friction between the segmental cage 9 and the guide flanges 16a, b can be adjusted by the overdimension. In addition, it is slightly resilient by means of the incisions, which are designed as slits 27a, b, 28a, b, which reduces the risk of rupture/breaking/loss of the side ring portions 25a, b, 26a, b as friction elements.

[0047] In the segmental cage 9, the friction is generated at certain points and prevents the segmental cage 9 from slipping in the partial shell 13 or out of the partial shell 13. Alternative solutions are more difficult to adjust in production. However, the friction should not be too high (effect on the efficiency of the application) and it should practically only prevent the segmental cage 9 from slipping during the assembly process. After assembly, the anti-slip securing means is no longer required. For this purpose, the incisions/slits 27a, b, 28a, b are also provided for slight, possible resilience. In addition, the anti-slip elements must not be “lost” over the course of their service life, i.e. they must not wear out to such an extent that they fall off or break off. This might happen with other solutions, but the risk does not occur with the segmental cage 9.

REFERENCE NUMERALS

[0048] 1 Swivel lever arrangement

[0049] 2 Disc brake

[0050] 3 Actuator

[0051] 4 Swivel lever

[0052] 5 Brake caliper

[0053] 6a Free end

[0054] 6b Swivel end

[0055] 7 Counter-bearing portion

[0056] 8 Segmental bearing device

[0057] 9 Segmental cage

[0058] 10 Rolling element

[0059] 11 First bearing race

[0060] 12 Second bearing race

[0061] 13 Partial shell

[0062] 14a,b Side ring region

[0063] 15 Intermediate web

[0064] 15a,b End webs

[0065] 16a,b Guide flanges

[0066] 17a,b Stop members

[0067] 18 Lug portion

[0068] 19a,b End regions

[0069] 20 Receptacles

[0070] 21a,b Intersection regions in the end region 19a

[0071] 22a,b Intersection regions in the end region 19b

[0072] 23a,b Interference regions in the end region 19a

[0073] 24a,b Interference regions in the end region 19b

[0074] 25a,b Side ring portion in the end region 19a

[0075] 26a,b Side ring portion in the end region 19b

[0076] 27a,b Slit in the end region 19a

[0077] 28a,b Slit in the end region 19b

[0078] 29a,b Intermediate region