Component of a disc brake for a utility vehicle

Abstract

The invention relates to a component (4, 10) of a disc brake (2) for a utility vehicle, said component comprising at least one connection region for connecting an expansion device (30) by means of which a brake caliper (6) of the disc brake (2) and / or a brake pad (10) of the disc brake (2) can be returned after a brake-induced displacement and release of the disc brake (2), wherein the connection region has a bore. The component (4, 10) comprises a bushing (49) which is arranged at least partially in the bore, wherein the bushing (49) comprises a receiving part for receiving an end section (32, 34) of the expansion device (30) and a collar which is arranged at one end of the receiving part, wherein the collar at least partially covers the connection region.

Description

[0001] 2024P00222 DE 06.11.2024

[0002] - 1 -

[0003] Component of a disc brake as well as disc brake for a commercial vehicle

[0004] The invention relates to a component of a disc brake for a commercial vehicle and to a corresponding disc brake.

[0005] Disc brakes for commercial vehicles, especially pneumatically or electromechanically actuated disc brakes, are, for example, designed as sliding caliper brakes. These disc brakes comprise a stationary brake carrier and a brake caliper that is movable relative to the brake carrier. Furthermore, brake pads are arranged so that they are pressed against a brake disc by a clamping mechanism to apply braking force.

[0006] When the brake is released, a residual friction torque sometimes remains between the brake pads and the brake disc. This occurs when, despite the release of the clamping mechanism, the brake pads still make contact with the brake disc in such a way that a reduced braking torque results. This increases both brake wear and the fuel consumption of the commercial vehicle.

[0007] Therefore, for example, EP 3 555 495 A1 proposes a spreading device that reduces the residual drag torque by retracting the brake caliper. The spreading device has several connection points that link it to the brake carrier and the brake pads. In some cases, dirt can accumulate at some of these connection points. Corrosive media can also cause rusting at the connection points. This can, for example, make it difficult to detach the spreading device at some connection points during disc brake maintenance.

[0008] It is an object of the present invention to eliminate or at least reduce these disadvantages.

[0009] In particular, it is an object of the present invention to provide a component of a disc brake that exhibits particularly good durability and / or enables easy maintenance of the disc brake. 2024P00222 DE 06.11.2024

[0010] - 2 -

[0011] According to the invention, this problem is solved by a component of a disc brake for a commercial vehicle comprising at least one connection area for connecting a spreading device, with which a brake caliper of the disc brake and / or a brake pad of the disc brake can be returned after a braking-induced displacement and release of the disc brake, wherein the connection area has a bore, wherein the component comprises a bushing arranged at least partially in the bore, wherein the bushing comprises a receiving part for receiving an end section of the spreading device and a collar arranged at one end of the receiving part, wherein the collar at least partially covers the connection area.

[0012] Thanks to the collar of the bushing, which at least partially covers the connection area, especially around the bore, the ingress of moisture and dirt is prevented. This reduces or prevents corrosion in or on the bore. Furthermore, it prevents the end section of the expanding device from becoming jammed due to corrosion, allowing the expanding device to be easily detached during maintenance.

[0013] According to preferred embodiments, the component according to the invention comprises one, several or all of the following features, in all technically possible combinations:

[0014] The band extends from the end of the receiving part in a mushroom or umbrella shape.

[0015] The collar is in contact with a surface of the connection area, preferably with the collar being prestressed relative to the surface.

[0016] The socket has a closed bottom.

[0017] The bore is a blind hole, and the closed end of the bushing is at least partially in contact with the bottom of the blind hole, and / or the closed end of the bushing has a shape corresponding to the bottom of the bore. 2024P00222 DE 06.11.2024

[0018] - 3 -

[0019] The bushing is attached to an inner wall of the bore via a press fit.

[0020] The bushing is made of metal, preferably sheet metal, and / or plastic.

[0021] The socket has a transition area with a chamfer, the transition area connecting the receiving part to the collar.

[0022] The socket has ribs arranged on one outside of the receiving part.

[0023] The receiving part is a cylinder or has a conical shape.

[0024] The component is a brake pad, wherein the bore is preferably arranged in a pad carrier plate of the brake pad.

[0025] The component is a brake carrier and preferably the bore is arranged in a brake carrier horn of the brake carrier.

[0026] The invention further relates to a disc brake for a commercial vehicle comprising a brake carrier with brake carrier horns, a brake caliper slidably arranged on the brake carrier, and two brake pads which are slidable against a brake disc by means of a clamping unit, wherein the disc brake further comprises a spreading device with which the brake caliper and / or the brake pads can be returned after a braking-induced displacement and release of the disc brake, wherein the spreading device has at least one end section, wherein the brake carrier and / or each brake pad comprises at least one connection area for connecting the spreading device, wherein the connection area has a bore, wherein the disc brake comprises a bushing arranged at least partially in the bore, wherein the bushing has a receiving part in which the end section is at least partially received.and includes a bund arranged at one end of the receiving section, the bund at least partially covering the connection area.

[0027] The present invention is explained in more detail below with reference to exemplary embodiments and several figures. However, individual components shown may also be found in 2024P00222 DE 06.11.2024

[0028] - 4 - can be combined in modified ways, so that the invention is not limited to these illustrated embodiments.

[0029] They show:

[0030] Figure 1 shows a schematic perspective view of a disc brake with at least one bushing according to a first embodiment;

[0031] Figure 2 is an enlarged schematic view of the disc brake of Figure 1;

[0032] Figure 3 is a schematic perspective view of the disc brake of Figure 1 with a section through a brake carrier horn of the disc brake;

[0033] Figure 4 shows a schematic sectional view of part of Figure 3 with the bushing according to the first embodiment;

[0034] Figure 5 shows a schematic perspective view of the socket according to the first embodiment;

[0035] Figure 6 shows a schematic perspective view of the disc brake of Figure 1 with a section through the pad carrier plates of the disc brake;

[0036] Figure 7 is a detail view of Figure 6, and

[0037] Figure 8 shows a schematic perspective view of a bushing according to a second embodiment.

[0038] Figures 1 to 3 show a disc brake 2 for a commercial vehicle comprising a brake carrier 4 fixed to the vehicle, a brake caliper 6 slidably mounted on the brake carrier 4 and engaging a brake disc 8, and two brake pads 10 which can be pressed against the brake disc 8 by a clamping unit (not shown). 2024P00222 DE 06.11.2024

[0039] - 5 -

[0040] According to various examples, the brake carrier 4 and / or the brake pads 10 are referred to as component(s) of the disc brake 2. The brake carrier 4 and the brake pads 10 thus form components of the disc brake 2.

[0041] The brake carrier 4 comprises two brake carrier horns 12, each of which defines a lining channel for receiving the brake linings 10.

[0042] The brake caliper 6 comprises, as illustrated, for example, in Figure 2, a clamping section 14, a caliper back 16, and two tie rods 18. The clamping section 14 runs substantially parallel to a plane of the brake disc 8 on one side of the brake disc 8. On the other side of the brake disc 8, also running substantially parallel to the brake disc 8, the caliper back 16 is arranged. The caliper back 16 is connected to the clamping section 14 at each end by a tie rod 18. The tie rods 18 run substantially perpendicular to the clamping section 14 and the caliper back 16.

[0043] The clamping section 14 has an interior space in which the clamping unit of the disc brake 2, which is not shown, is arranged.

[0044] In this arrangement, the clamping section 14, the caliper back 16, and the tie rods 18 define a central opening 20 between them, which spans the brake disc 8. The opening 20 has an imaginary longitudinal centerline that lies in the plane of the brake disc 8 and connects the centers of the tie rods 18. The opening 20 also has an imaginary transverse centerline that connects a center of the clamping section 14 with a center of the caliper back 16. The longitudinal centerline and the transverse centerline intersect at a midpoint of the opening 20.

[0045] The brake pads 10 are accessible for replacement and maintenance through the opening 20. They can be inserted into and removed from their respective pad slots in the brake carrier 4 through this opening 20.

[0046] Each brake pad 10 has a backing plate 22 and a friction lining 24 attached to it on the side facing the brake disc 8, which is pressed against the brake disc 8 when in operation, i.e., during braking. 2024P00222 DE 06.11.2024

[0047] - 6 - the other side of the backing plate 22 is hereinafter referred to as the printing side.

[0048] A pad retaining bracket 26 is arranged above the brake pads 10 in the transverse direction of the opening 20 or in the direction of a rotation axis of the brake disc 8 between the clamping section 14 and the caliper back 16. The pad retaining bracket 26, particularly with sections of its underside, presses against pad retaining springs 28 of the brake pads 10, thereby holding the brake pads 10 in their pad slots. The pad retaining springs 28 are each held on projections on the upper sides of the pad backing plates 22.

[0049] Braking is effected by means of the clamping device located in the clamping section 14 of the brake caliper 6, for example, by a brake lever positioned in a dome of the brake caliper 6. The brake pad 10 located on the clamping section 14, referred to as the action-side or clamping-side brake pad, initially contacts the brake disc 8 during braking. Subsequently, the brake caliper 6 is moved in the opposite direction by means of the resulting reaction forces, taking with it the brake pad 10 located on the caliper back 16, which is referred to as the reaction-side brake pad, until it too comes to contact the brake disc 8, rubbing against it.

[0050] After the brake is released, the two opposing brake pads 10 are preferably released from the brake disc 8 by means of a return mechanism (not shown). In some cases, the brake pads 10 may still contact the brake disc 8 even after the braking force has been released, thereby causing a residual grinding torque.

[0051] The disc brake 2 further comprises a spreading device 30, by which the brake caliper 6 and / or the brake pads 10 can be returned after a braking-induced displacement and release of the disc brake 2. This reduces or eliminates, in particular, the residual friction torque.

[0052] The spreading device 30 comprises end sections 32, 34 for connecting the spreading device 30 to the brake carrier 4 and / or to the brake linings 10. The end sections 32, 34 are preferably straight. 2024P00222 DE 06.11.2024

[0053] - 7 -

[0054] For connecting the spreading device 30, the brake carrier 4, in particular the brake carrier horns 12, and / or each brake pad 10 has at least one connection area 47. This has a bore 36 for receiving the end sections 32, 34.

[0055] Examples of the spreading device 30 are shown in EP 3 555 495 A1. According to preferred embodiments, the spreading device 30 described here has one, several or all features of the spreading device described in EP 3 555 495 A1, which are therefore part of the description.

[0056] The spreading device 30 acts in the upper area of ​​the lining carrier plates 22 of the opposing brake linings 10, acting in the opposite direction to the clamping direction. In this way, the brake linings 10 are subjected to restoring forces in their upper areas by the spreading device 30.

[0057] The spreading device 30 comprises, for example, a connecting element 38, spring arms 40, for example four spring arms 40, and two connection interfaces 42, each with a connecting element 44.

[0058] The connecting element 38 is C-shaped, fixedly attached to the brake carrier 4, in particular to the brake carrier horns 12, and forms a support for the spring arms 40.

[0059] The connecting element 38 and the spring arms 40 are made of a wire material with, for example, a circular cross-section. For instance, the circular cross-section of the spring arms 40 is smaller than the circular cross-section of the connecting element 38.

[0060] The connecting element 38 comprises a central section 38a, which runs straight in this case, in a central region of the opening 20, approximately in a central plane of the brake disc 8. A connecting section 38b, inclined downwards towards the brake disc 8, adjoins the central section 38a on each side. Thus, the connecting element 38 extends from the center of the opening 20 on both sides to a brake carrier horn 12 of the pad recess of the tension-side brake pad 10. 2024P00222 DE 06.11.2024

[0061] - 8 -

[0062] At each end of the connecting sections 38b, an arc-shaped connecting section 38c is attached, which is bent towards the respective brake carrier horn 12 and transitions into a further straight connecting section 38d that runs towards the respective brake carrier horn 12. These connecting sections 38d then run parallel to each other and parallel to the axis of rotation of the brake disc 8 and are then bent, preferably downwards, into the respective end section 32. Each end section 32 of the connecting element 38 is received in the bore 36 of the respective brake carrier horn 12, in particular by positive locking, and thus forms the fixed mounting of the spreading device 30 on the brake carrier 4.

[0063] The connecting element 38 forms a centering device for the brake caliper 6 insofar as the brake carrier 4, to which the connecting element 38 is attached, forms a stationary part relative to which the brake caliper 6 is slidably mounted, so that after releasing the brake and spreading the spreading device 30, i.e., pushing the brake pads 10 apart, the brake caliper 6 is guided into a centered position.

[0064] Two spring arms 40 each form a pair of spring arms that are designed as mirror images of the central section 38a of the connecting element 38. The two pairs are designed as mirror images of each other, in particular with respect to an axis that runs parallel to the axis of rotation of the brake disc.

[0065] Each spring arm 40 preferably has a straight body with an inner and an outer end. The inner ends point towards the center of the opening 20, and the outer ends point towards an end region of the respective pad support plate 22. At their outer ends, the spring arms 40 have end sections 34, optionally connected via a curved section of the respective spring arm 40. The end sections 34 of the spring arms 40 are received in the respective bores 36 of the pad support plates 22, in particular by a positive fit. The preload resulting from the clamping action allows the brake pads 10 to spread after the brake is released. The inner ends of the spring arms 40 are connected together via the connection interface 42 to the connecting element 44. 2024P00222 DE 06.11.2024

[0066] - 9 -

[0067] Preferably, each pair of spring arms 40, together with a connecting arc 46 linking the inner ends of the spring arms 40, forms a spring arm unit. Each spring arm unit is particularly well formed from a single wire or in one piece, such that the inner ends of the spring arms 40 are connected at the connection interface 20 via the connecting arc 46, see, for example, Figure 3. In particular, the end sections 34 are also part of this single or one-piece wire. Preferably, one pair of spring arms 40 is arranged to the right of the center of the opening 20 and the other pair of spring arms 40 is arranged to the left of the center of the opening 20.

[0068] The connecting elements 44 each form a connection interface 42 between the respective spring arms 40 and the stationary connecting element 38. Preferably, each connecting element 44 is in contact with the respective spring arms 40 on one side and with the connecting element 38 on the other.

[0069] Each spring arm unit with its respective two spring arms 40 is axially displaceable in the longitudinal direction of the central section 38a of the connecting element 38 via the respective connecting element 44 and is preferably also rotatably mounted on the central section 38a of the connecting element 38.

[0070] The spring arm units can move independently of each other in the axial direction of the longitudinal axis of the central section 38a of the connecting section 38 and simultaneously rotate independently of each other about the longitudinal axis of the central section 38a. This makes the spreading device 30 particularly flexible and adaptable. However, for easier assembly, it is also conceivable to fix the rotation.

[0071] According to an embodiment not shown, the spreading device 30 has two pairs of spring arms 40 which are not centered; that is, in particular, the spreading device 30 has no (connecting) element attached to the brake carrier 4. The end sections 34 of each pair of spring arms 40 are received in respective bores 36 of the lining carrier plate 22. Each pair of spring arms 40 has, for example, a substantially V-shaped contour. A first leg of the V-shaped contour extends, for example, from one of the end sections 34 to a center point 2024P00222 DE 06.11.2024

[0072] - 10 - between the brake pads 10 and a second leg of the V-shaped contour extends from this center point to the other end section 34. The spring arms 40 exert a corresponding spreading force on the respective brake pads 10, which pushes the brake pads 10 apart.

[0073] Preferably, the disc brake 2 has two bores 36 in the brake carrier horns 12 for receiving the end sections 32 of the connecting element 38 and two bores 36 on each pad carrier plate 22 for receiving the end sections 34 of the spring arms 40. For example, the bores 36 on the brake carrier horns 12 are arranged parallel to a removal direction of the brake pads 10 and, in particular, on a top side of the brake carrier horns 12. The bores 36 in the lining carrier plates 22 are arranged on a side having the lining retaining spring 28, particularly in corner regions of the respective lining carrier plate 2. The bores 36 in the lining carrier plates 22 preferably extend parallel to the bores 36 in the brake carrier horns 12. According to one embodiment, each lining carrier plate 22 has two bores 36 for receiving the end sections 34, but the brake carrier 4 has no bores for connecting the spreading device 30.

[0074] Each bore 36 is arranged in the connection area 47. The connection area 47 is, for example, a surface of the brake carrier horn 12 or the pad carrier plate 22. The connection area 47 on the brake carrier horns extends, in particular, towards the opening 20. The connection area 47 on the pad carrier plates 22 is arranged on a side having the pad retaining spring 28. Each bore 36 has an inner wall 48, which, in particular, adjoins the surface of the connection area 47 directly. Each bore 36 is preferably a blind bore with a bore bottom 53. The bore bottom 53 extends in a plane perpendicular to a bore axis of the bore 36 or is recessed towards the center of the bore 36.

[0075] According to the invention, the disc brake comprises a bushing 49 arranged at least partially in one of the bores 36. In the examples shown in Figures 1 to 3 and Figure 6, the disc brake 2 has one bushing 49 for each bore 36. According to other examples, corresponding bushings 49 are arranged only in the bores 36 of the brake carrier 4 or the bores 36 of the pad carrier plates 22. 2024P00222 DE 06.11.2024

[0076] - 11 -

[0077] A first embodiment of the bushing 49 is illustrated in Figures 1 to 7. The bushing 49 is made, for example, of metal, preferably sheet metal, and / or plastic. Preferably, the bushing 49 is made of a single and / or homogeneous material. Preferably, the bushing 49 is formed in one piece. For example, the bushing 49 is manufactured by injection molding.

[0078] The following is an example of the socket, with particular reference to Figure 4.

[0079] Bushing 49 is described for receiving one of the end sections 32 of the connecting element 38. Preferably, the bushing 49 for receiving the end sections 34 of the spring arms 40 has an identical geometry, possibly with a different size.

[0080] The bushing 49 comprises a receiving part for receiving the respective end section 32. The receiving part is, for example, essentially a cylinder and is hereinafter also referred to as the "cylindrical part" with reference numeral 50. According to other examples, the receiving part has at least a partially conical shape and / or has draft angles. A conical shape, in particular, enables the simple manufacture of bushing 49, for example, by injection molding. According to the examples, the receiving part in a conical shape has one or more features of the examples in which the receiving part is a cylindrical part 50.

[0081] The cylindrical part 50 extends along an axis 52. The axis 52 is parallel to and identical with a bore axis of the bore 36. The cylindrical part

[0082] 50 has an outer surface 51 which faces the inner wall 48 when the bushing 49 is inserted into the bore 36.

[0083] The bushing 49, in particular the cylindrical part 50, is preferably press-fitted to the inner wall 48 of the bore 36. The outer side

[0084] 51 is at least partially in contact with the inner wall 48 when the bushing 49 is inserted into the bore 36.

[0085] The bushing 49 comprises a collar 56 arranged at a first axial end 54 of the cylindrical part 50. The collar 56 at least partially covers the connection area 47. For example, the collar 2024P00222 DE 06.11.2024

[0086] - 12 -

[0087] 56 an annular surface of the connection area 47, which directly adjoins the inner wall 48 of the bore 36. Preferably the collar 56 is mushroom- or umbrella-shaped and / or is bent towards the surface of the connection area 47 or an end face of the bore 36.

[0088] The collar 56 preferably forms an angle 57 less than 90 degrees with the outer surface 51 of the cylindrical part 50, for example between 50 and 90 degrees, preferably between 68.5 degrees and 63.5 degrees. The angle 57 is defined in a plane containing the axis 52.

[0089] The collar 56 is in contact with the surface of the connection area 47. Preferably, the collar 56 is pre-tensioned relative to the connection area 47, i.e., it exerts a force on the connection area 47. This enables, in particular, simultaneous sealing of the surface of the connection area 47 (i.e., especially around the end face of the bore) and a positive-locking contact between the surface 64 of the closed base 60 and the bore bottom 53. This is particularly advantageous because it allows for the compensation of potential manufacturing tolerances.

[0090] The collar 56 has a surface 58 that is visible when the bushing 49 is arranged in the bore 36. This surface 58 preferably corresponds to a lateral surface of a truncated cone.

[0091] Preferably, the bushing 49 has a transition area with a chamfer 59. The transition area connects the cylindrical part 50 to the collar 56. The chamfer 59 corresponds, for example, to a lateral surface of an inverted truncated cone and is preferably oriented towards the axis 52. The chamfer particularly facilitates the insertion of the end section 32.

[0092] The bushing 49 preferably has a closed bottom 60, which is arranged, in particular, at a second axial end 62 of the cylindrical part 50 opposite the first axial end 54. The closed bottom 60 is in contact, at least partially, with the bore bottom 53 of the blind hole. The closed bottom 60 extends, for example, in a disk-like shape orthogonally to the axis 52 of the cylindrical part 50. Preferably, a surface 64 of the closed bottom 60 facing the bore bottom 53 is at least partially, 2024P00222 DE 06.11.2024

[0093] - 13 - preferably predominantly and / or completely in contact with the bore bottom 53.

[0094] In particular, the bushing 49 has a geometry such that a force transmitted from the end section 32, 34 to the closed base 60 initially causes the bushing 49 to be pressed further into the bore 36 as soon as the transmitted force exceeds the frictional force of the press fit between the bushing 49 and the inner wall 48 of the bore. This causes the mushroom- or umbrella-shaped collar 56 to compress, further increasing the seal between the collar 56 and the connection area 47. With further force being applied to the closed base 60 by the end section 32, 34, the surface 64 of the closed base 60 comes into contact with the bore bottom 53, so that the force is transmitted further to the bore bottom 53. This prevents damage or destruction of the closed base 60, especially under high force transmission.

[0095] The closed bottom 60 also makes it possible to prevent media from entering between socket 49 and bore 36 from below (capillary action).

[0096] For example, the closed base 60 has, on the surface 64 facing the bore bottom 53, a chamfer 66, to which a circular disk adjoins radially inwards. For example, the closed base 60 has a shape corresponding to the bore bottom 53.

[0097] Figures 6 and 7 show an example of the bores 36 in the support plates 22 with the bushings 49 arranged in the bores 36. The end sections 34 of the spring arms 40 received in the bushings 49 preferably have a diameter that is smaller than the inner diameter of the cylindrical part 50 of the bushings 49. Thus, the respective end section 34 only partially rests against an inner surface of the cylindrical part 50. The bushing 49 receiving the end section 34 preferably has some or all of the features of the bushing 49 that receives the end section 32 of the connecting element 38.

[0098] Figure 8 illustrates the bushing 49 according to a second embodiment. The bushing 49 according to the second embodiment comprises a, 2024P00222 DE 06.11.2024

[0099] - 14 - several or all features of the bushing of the first embodiment. The bushing 49 also has ribs 68, for example three ribs 68. Each rib 68 extends on the outer surface 51 of the cylindrical part 50. Each rib 68 preferably extends parallel to the axis 52 of the cylindrical part 50, for example over about half the axial length of the cylindrical part 50. The ribs 49 make it possible, for example, to obtain a contact surface between the bushing 49 and the inner wall 48 of the bore 36 that is extended in the direction of the axis 52 compared to the first embodiment. In particular, the ribs 49 make it possible to precisely adjust the press-fit forces and to obtain a particularly robust press fit between the bushing 49 and the bore 36.

[0100] Each rib 68 preferably has a chamfer 70, via which the rib 68 transitions into the outer surface 51 of the cylindrical part 50 in the direction of the axis 52 of the cylindrical part 50. The chamfer 70 corresponds in particular to a height of the rib 68 that varies in the direction of the axis 52, wherein the height of the rib 68 is the radial extension of the rib 68 relative to the axis 52, starting from the outer surface 51 of the cylindrical part 50. The chamfer particularly facilitates the insertion of the bushing 49 into the bore 36.

[0101] The present invention has a large number of advantages. The components of the disc brake 2 enable easy maintenance of the disc brake 2 and ensure particularly good durability. In particular, corrosion in the bores 36 is prevented or at least reduced.

[0102] The collar 56 allows the bushing to deflect under load in the direction of the axis of the bore 36 through the respective end sections 32, 34. This ensures a particularly reliable seal at the connection area 47 around the bore 36. Due to this reliable seal, no moisture or dirt can penetrate between the inner wall 48 of the bore and the outer surface 51 of the cylindrical part 50 or the receiving part. The preferably closed base 60 also rests on the bore bottom 53, thus preventing the ingress of dirt or moisture. 2024P00222 DE 06.11.2024

[0103] - 15 -

[0104] The combination of the mushroom- or umbrella-shaped collar 56 with the closed base 60 enables a positive fit between the closed base 60 and the bore bottom 53, while simultaneously ensuring a reliable seal at the collar 56. A preload force transmitted from the end section 32, 34 to the bushing 49 is further transferred to the bore bottom 53, thus preventing damage to the closed base 60 and ensuring a tight seal at the collar 56.

[0105] 2024P00222 DE 06.11.2024

[0106] - 16 -

[0107] Reference symbol list

[0108] 2 disc brakes

[0109] 4 brake carriers

[0110] 6 brake calipers

[0111] 8 brake disc

[0112] 10 brake pads

[0113] 12 Brake carrier horn

[0114] 14 Tensioning section

[0115] 16 saddle back

[0116] 18 tie rods

[0117] 20 Opening

[0118] 22. Support plate

[0119] 24 friction lining

[0120] 26 pad retaining clips

[0121] 28 Pad retaining spring

[0122] 30 Spreader device

[0123] 32 End section (of a connecting element)

[0124] 34 End section (of a spring arm)

[0125] 36 bore

[0126] 38 Connecting element

[0127] 38a Central section

[0128] 38b Connecting section

[0129] 38c Connection section

[0130] 38d Connection section

[0131] 40 spring arm

[0132] 42 Connection interface

[0133] 44 Connecting element

[0134] 46 connecting arcs

[0135] 47 Connection area

[0136] 48 Inner wall

[0137] 49 socket

[0138] 50 cylindrical part

[0139] 51 Outside

[0140] 52 axle

[0141] 53 Borehole bottom

[0142] 54 first axial end

[0143] 56 Federal 2024P00222 DE November 6, 2024

[0144] - 17 -

[0145] 57 angles

[0146] 58 surface

[0147] 59th phase

[0148] 60 closed floor

[0149] 62 second axial end

[0150] 64 surface

[0151] 66th phase

[0152] 68th rib

[0153] 70° bevel

Claims

2024P00222 DE 06.11.2024 - 18 - Claims 1. Component (4, 10) of a disc brake (2) for a commercial vehicle comprising at least one connection area (47) for connecting a spreading device (30) with which a brake caliper (6) of the disc brake (2) and / or a brake pad (10) of the disc brake (2) can be returned after a braking-induced displacement and release of the disc brake (2), wherein the connection area (47) has a bore (36), wherein the component (4, 10) comprises a bushing (49) arranged at least partially in the bore (36), wherein the bushing (49) comprises a receiving part (50) for receiving an end section (32, 34) of the spreading device (30) and a collar (56) arranged at one end (54) of the receiving part (50), wherein the collar (56) at least partially covers the connection area (47).

2. Component (4, 10) according to claim 1, wherein the collar (56) extends from the end (54) of the receiving part (50) in a mushroom or umbrella shape.

3. Component (4, 10) according to claim 1 or claim 2, wherein the collar (56) is in contact with a surface of the connection area (47), wherein preferably the collar (56) is prestressed relative to the surface.

4. Component (4, 10) according to any of the preceding claims, wherein the bushing (49) has a closed bottom (60).

5. Component (4, 10) according to claim 4, wherein the bore (36) is a blind bore and the closed bottom (60) of the bushing (49) is in contact at least partially with a bore bottom (53) of the blind bore and / or wherein the closed bottom (60) of the bushing (49) has a shape corresponding to the bore bottom (53).

6. Component (4, 10) according to any of the preceding claims, wherein the bushing (49) is attached via press fit to an inner wall (48) of the bore (36). 2024P00222 DE 06.11.2024 - 19 - 7. Component (4, 10) according to any of the preceding claims, wherein the bushing (49) is made of metal, preferably sheet metal, and / or plastic.

8. Component (4, 10) according to any of the preceding claims, wherein the bushing (49) has a transition area with a chamfer (59), the transition area connecting the receiving part (50) to the collar (56).

9. Component (4, 10) according to any of the preceding claims, wherein the bushing (49) has ribs (68) arranged on an outer side (51) of the receiving part (50).

10. Component (4, 10) according to any of the preceding claims, wherein the receiving part (50) is a cylinder or has a conical shape.

11. Component (10) according to any of the preceding claims, wherein the component is a brake pad (10), wherein preferably the bore (36) is arranged in a pad carrier plate (22) of the brake pad (10).

12. Component (4) according to any one of claims 1 to 10, wherein the component is a brake carrier (4) and preferably the bore (36) is arranged in a brake carrier horn (12) of the brake carrier (4).

13. Disc brake (2) for a commercial vehicle comprising a brake carrier (4) with brake carrier horns (12), a brake caliper (6) slidably arranged on the brake carrier (4) and two brake pads (10) which are slidable against a brake disc (8) by means of a clamping unit, wherein the disc brake (2) further comprises a spreading device (30) with which the brake caliper (6) and / or the brake pads (10) can be returned after a braking-induced displacement and release of the disc brake (2), wherein the spreading device (30) has at least one end section (32, 34), wherein the brake carrier (4) and / or each brake pad (10) comprises at least one connection area (47) for connecting the spreading device (30), wherein the connection area (47) has a bore (36), 2024P00222 DE 06.11.2024 - 20 - wherein the disc brake (2) comprises a bushing (49) arranged at least partially in the bore (36), wherein the bushing (49) has a receiving part (50) in which the end section (32, 34) is received at least partially, and comprises a collar (56) arranged at one end (54) of the receiving part (50), wherein the collar (56) at least partially covers the connection area (47).

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