Brake block with ears with at least one through-hole

Abstract

Brake pad (1) for a disc brake system, comprising a backplate (2) with a first side (21) and a second side (22) facing away from the first side (21), wherein a friction material (3) is attached to the first side (21) of the backplate (2), the backplate (2) comprising two ears (24) at or near opposite ends of the backplate (2), the ears (24) projecting beyond the friction material (3) and being configured for engagement with a support structure (7), wherein at least one of the ears (24) comprises at least one through-hole (25) provided in a material of the backplate (2) and extending from the first side (21) to the second side (22), wherein the at least one through-hole (25) comprises a through-hole (25a) which is enclosed on all sides by a material of the back plate (2), wherein at least one of the ears (24) includes at least two through holes (25a), wherein at least one through-hole (25) is provided in a first ear on the leading side of the backplate (2) and wherein at least one through-hole (25) is provided in a second ear on the trailing side of the backplate (2), wherein the first ear and the second ear have a different configuration of through-holes.

Description

[0001] The invention lies in the field of mechanical engineering, particularly automotive engineering. It relates to a brake pad for a disc brake system. The invention can be advantageously used in a disc brake system of a passenger car or truck.

[0002] Document JP S57-163 736 A shows a disc brake in which ears are formed on both sides of a pad backing plate. These ears can slide on a pad guide section formed in a step on a bracket and guide a pad axially along a disc. Cavities formed on the ears facilitate elastic deformation of the ears when they press against a torque-absorbing surface on a pad guide section of the bracket.

[0003] Document US 2016 / 0169306A1 discloses a reinforced brake pad backing plate and brake pad intended for use in a disc brake, including a commercial vehicle disc brake. The reinforced brake pad backing plate incorporates reinforcing material located in a radially outer region of the backing plate, which increases the stiffness of the brake pad and provides a surface that facilitates the insertion and removal of the brake pad during disc brake maintenance. The reinforcing material may extend axially from the sides of the brake pad backing plate away from and / or toward the disc brake disc.

[0004] Document KR 10 2013 0 068 469 A shows a brake pad retraction device for a vehicle, comprising a bracket, a pair of backing plates, and an elastic component. Two backing plates are attached to the bracket on the inside of the vehicle body. Each pair of backing plates is attached to the bracket and comprises an arm and a slot. One end of the elastic component is attached to the underside of the arm of the backing plate. The other end of the elastic component is inserted into a slot in the backing plate and slides into place.

[0005] Document JP 2005-127 441 A shows an elastic body arranged between the end part of a friction lining backplate in the circumferential direction of a rotor within the friction lining, which is pressed and separated from a disc rotor, and a torque-absorbing element opposite it. The elastic body is made of viscoelastic material and is partially in frictional engagement with a bearing surface of the torque-absorbing element in order to be viscoelastically deformed in the circumferential direction of the rotor, in the radial direction of the rotor, and in the axial direction of the rotor.

[0006] JP 2015-14324A shows a friction lining comprising a lining return spring that contacts a brake caliper and moves a carrier plate toward the caliper in an isolation direction to isolate a friction material from a disc rotor. A notch to which a spring can be attached is formed on the carrier plate, and the spring is formed from a linear elastic body obtained by bending an annular portion that contacts an arrangement surface of the friction material on the carrier plate, an annular portion that contacts a rear surface of the arrangement surface of the friction material on the carrier plate, a coupling portion for connecting the annular portions, and a contact portion connected to the annular portion so that it can contact the brake caliper. The coupling portion is inserted into the notch and mounted on the carrier plate to enclose the carrier plate through the annular portions.

[0007] Document FR 2 864 595 A1 shows a brake pad with a mounting area equipped with a stiffness-generating unit to create an intermediate stiffness between spring stiffness and yoke stiffness. The unit has openings and is located in a stop area of ​​the pad. During braking, the tangential movement of the pad brings the zone against the yoke of a brake caliper.

[0008] Document US 2023 / 0076059A1 discloses a brake pad that may have at least one plate. The plate may be provided with a first slot. The first slot may have a first slot edge suitable for receiving a first pin. The first slot edge may have a first section and a second section in which the brake pad has a tangential center of gravity plane. The first and second sections may be intersected by the tangential center of gravity plane such that, during reverse braking, the brake pad rests on the first pin at at least one first contact point of the first slot. During forward braking, the brake pad rests on the first pin at at least one second contact point of the first slot, the second contact point of the first slot lying in the tangential center of gravity plane.

[0009] DE 10 2018 221 311 A1 proposes a return spring system for the active adjustment of a brake pad clearance in a motor vehicle disc brake, which is in principle suitable for fixed and floating caliper brakes and, with improved handling and corrosion protection, ensures a permanently uniform return torque of the brake pad in all operating and wear conditions and provides for this purpose that the brake pad clearance spring is explicitly assigned to the brake pad as a tension spring which is elastically tensioned between the brake pad and a brake caliper and is permanently and securely connected to the brake pad at at least one point of force application, in particular in a non-removable manner and wherein the point of force application is arranged on a side of the friction pad carrier plate facing away from the friction lining.

[0010] DE 44 35 669 A1 shows a disc brake for motor vehicles, comprising a brake carrier, a brake disc, a brake caliper extending over the brake disc and attached to the brake carrier for brake shoes arranged on both sides of the brake disc, each comprising a carrier plate with side edges supported tangentially to the direction of rotation of the brake disc on lateral guide elements, a brake lining firmly connected to the carrier plate and damping means for preventing frictional vibrations during braking, characterized in that the damping means are integrated in the side edges of the carrier plate facing the guide elements.

[0011] DE 101 34 067 A1 shows that in a brake shoe, in particular for a disc brake of motor vehicles, with a carrier plate on which a friction lining is attached, it is provided that the carrier plate is formed from several interconnected or separate plate parts, at least one of which carries the friction lining, which is elastically or viscoelastically mounted relative to the at least one further plate part to prevent frictional vibrations during braking.

[0012] DE 10 2013 111 584 A1 proposes, in order to further improve a carrier body comprising a friction lining carrier plate and at least one first damping mass rigidly connected to the friction lining carrier plate, such that the rigid connection between the friction lining carrier plate and the first damping mass is more robust, a first pin-shaped projection of the first damping mass is inserted into the first hole of a friction lining carrier plate in such a way that the head of the first pin-shaped projection protrudes from the first hole and partially rests against a first chamfer in the area of ​​a first edge of the first hole.

[0013] US Patent 2011 / 0 180 354 A1 describes a disc brake for motor vehicles that is simple in design, consists of few parts, requires few machines for its manufacture, and is quiet and easy to install. The brake anchor plate receives retaining bolts in its mounting lugs, which in turn support the brake pads. The floating caliper is connected to the pad carriers via springs and through pins.

[0014] Document FR 2 471518 A1 shows a disc brake shoe consisting of a backing plate that carries the brake pad. The pad has grooves that collect the dust generated during braking. Rubber wiper plates are attached to extensions of the backing plate at both ends of the brake shoe. These are initially slightly thinner than the brake pad, but after several braking operations, their thicknesses become identical. The side surfaces of the wiper plates are spaced away from the friction pad and have a curved front profile (with a semicircular or V-shaped cross-section) to direct the debris away from the braking surface.

[0015] According to the prior art, a brake pad for a disc brake system can comprise a backplate having a first side and a second side facing away from the first side, wherein a friction material is attached to the first side of the backplate, wherein the backplate has two ears at or near its opposite ends, the ears projecting beyond the friction material and configured for engagement with a support structure.

[0016] The ears can be designed, for example, as hammerheads or as projections with an essentially rectangular shape. They can be mounted to slide on the support structure to allow axial sliding of the brake pad towards the disc for braking, and / or they can be designed to abut the support structure when the brake pads engage the brake disc.

[0017] The various moving components of the brake, particularly the brake disc, brake pads, and backing structure, contribute to the generation and propagation of noise, vibration, and harshness (NVH). As these components move relative to one another, friction occurs between them, generating noise and vibration that are then transmitted from one component to the next. Additionally, flutter vibrations between the backing plate and the backing structure (or a pad spring) can cause squealing noises.

[0018] It is therefore an object of the invention to reduce at least some of the noises and vibrations described above and / or their propagation.

[0019] This is achieved by a brake pad for a disc brake system according to claim 1. Advantageous embodiments are described in the dependent claims, as well as in the following description and the figures.

[0020] Accordingly, a brake pad for a disc brake system is presented, comprising a backplate with a first side and a second side facing away from the first side, wherein a friction material is attached to the first side of the backplate.

[0021] The backplate includes two lugs at or near opposite ends. The lugs extend beyond the friction material; that is, they are not covered by it. The lugs are designed to engage with a support structure.

[0022] At least one of the ears includes at least one through-hole extending from the first side to the second side. This through-hole is provided in a material of the backplate. That is, a base material, such as a metal forming the backplate, is interrupted at the location of the through-hole. This base material typically forms the ears as well as a central part of the backplate to which the friction material is attached. The at least one through-hole can optionally be filled with a material other than the base material, such as a damping medium, either partially or completely, as explained below. Alternatively, the at least one through-hole can also remain completely or partially unfilled.

[0023] As previously mentioned, the backplate engages the carrier via the lugs (possibly alongside other potential engagement points). When installed in the disc brake system, the backplate is configured to slide axially between a braking state and a non-braking state, i.e., towards the brake pad when braking and away from the brake pad when the brakes are released, with the path of the brake pad being determined, for example, by the geometry of the carrier designed to accommodate the lugs.

[0024] Consequently, contact is established between the backplate and the carrier, and when the brakes are applied, vibrations and noise are transmitted from the brake disc, and especially from the point where the brake disc contacts the friction material, via the friction material to the backplate and the carrier. The ears form an area of ​​particularly strong contact with the carrier, so that vibration modes and sound waves travel through the ears to the carrier.

[0025] The ears can be designed, for example, as "hammerheads" or as projections with a substantially rectangular shape. They can project laterally from two opposite sides of the brake pad. They can be symmetrical or asymmetrical. The concept of the present invention can be applied to all known types of ears.

[0026] The special structure and shape shown here, which provides for at least one ear to have at least one opening, allows for advantageous damping of vibrations and noise. This is based, among other things, on two damping mechanisms: Structural damping occurs by dissipating some of the vibrational energy through elastic deformation of the ear(s), which is made possible by the at least one opening in the ear(s) (where the at least one opening provides elasticity). Furthermore, the propagation of structure-borne sound is hindered by the at least one opening (the propagation medium is interrupted by the opening).

[0027] The brake pad can be a brake pad for a braking system for a car or a truck.

[0028] A shim, for example, can be attached to the second surface of the backplate. An underlayer can be provided between the backplate and the friction material.

[0029] At least one of the ears has at least two openings extending from the first side to the second side. It may also have at least three or at least four openings extending from the first side to the second side.

[0030] The at least one through-hole comprises a through opening that is enclosed on all sides by a material of the backplate. The at least one of the ears comprises at least two through-holes. However, it can also have at least three through-holes. In particular, each ear can have at least two, at least three, or at least four through-holes.

[0031] Additionally or alternatively, the at least one through-hole may contain a lateral incision that is open at an edge of the backplate. The lateral incision may be located, for example, on a radially inner side of the ear and / or on a radially outer side of the ear and / or on a tangentially outer side of the ear. For example, the at least one ear may have at least two, at least three, or at least four lateral incisions.

[0032] In one example, the at least one through-hole can have an elongated shape. For instance, at least one through-hole can be provided that extends longitudinally along a radial direction. Additionally or alternatively, at least one through-hole can be provided that extends longitudinally along a tangential direction.

[0033] The minimum through-hole can, for example, have a cross-section of at least 1 mm x 2 mm, or at least 1 mm x 3 mm, or at least 1 mm x 4 mm. The through-hole can, for example, have a cross-section of no more than 4 mm x 7 mm.

[0034] The at least one through-hole can, for example, have an elliptical shape. An elliptical shape, which can also be described as oval, can advantageously prevent fatigue or cracking of the surrounding material of the backplate. The at least one through-hole can, for example, have a rectangular shape. In one example, several through-holes, which have the same or different shapes, are arranged side by side in one or each of the ears.

[0035] In one embodiment, the at least one through-hole, in particular the through-hole, can be provided at a distance of at most 5 mm or at most 4 mm or at most 3 mm and / or at least 1 mm or at least 2 mm from an edge of the brake pad.

[0036] In one embodiment of the brake pad, the at least one through-hole is filled with a damping medium. The damping medium is a material different from the material of the backplate. The damping medium can be, for example, rubber or plastic.

[0037] The damping medium can provide additional damping, but also additional stability of the backplate, and it can create a flat surface to allow smooth interaction of the ear(s) with a possible retraction spring, so that the retraction spring does not get caught in the through-hole.

[0038] For the brake pad, a leading side can be defined, where a certain section of the brake disc first comes into contact with the brake pad, and a trailing side, where this section leaves contact with the brake pad.

[0039] The backplate has an asymmetrical design, featuring a different configuration of through-holes in the leading and trailing ears. At least one through-hole is provided in a first ear on the leading side of the brake pad, and at least one through-hole is provided in a second ear on the trailing side. The first and second ears have different configurations of through-holes. For example, the through-holes in the first and second ears may differ in the number, position, type, geometry, and / or size of the through-holes.

[0040] The configuration of the through-holes in the first and second ear can be determined by simulating the forces, strains, and / or stresses acting on the backplate during braking. Accordingly, a method for designing a brake pad is disclosed, which includes a simulation of the forces, strains, and / or stresses acting on the backplate of the brake pad during braking. The positions of the through-holes, as well as their shapes and sizes, can then be selected based on the simulation to ensure the stability of the backplate, while contact sections that may generate noise and / or tend to transmit noise and vibration can be provided with a form elasticity and / or damped by a damping medium. It is noted that the features described in connection with the method can also be claimed for the brake pad and vice versa.

[0041] The invention will now be explained by way of example with reference to the attached figures, some of which are exemplary and do not necessarily show all claimed features of the invention.

[0042] In the characters: Fig. 1a-b show components of a disc brake system, Fig. Figure 2 shows a perspective view of a brake pad according to an exemplary embodiment, Fig. Figure 3 shows a section through a brake pad and a brake disc according to an exemplary embodiment. Fig. Figure 4 shows a view of a back plate of a brake pad according to an exemplary embodiment, Fig. Figures 5a-f show through-holes provided in an ear of a backplate, wherein the through-holes are designed as through holes. Fig. Figures 6a-b show unclaimed forms of through-holes provided in an ear of a backplate, wherein the through-holes are designed as lateral cutouts. Fig. Figure 7 shows a section of a backplate with several through-holes filled with a damping medium, and Fig. Figures 8a-b show backplates with an asymmetrical design.

[0043] Fig. Figures 1a and 1b show components of a braking system, including a brake disc 8 and a support structure 7 that holds a brake pad 1. A brake caliper 9 is provided, which accommodates a piston for actuating the brake pad 1, i.e., for moving the brake pad 1 in an axial direction A towards the brake disc 8 in order to brake. The brake pad 1 is guided in the support structure 7. For this purpose, the support structure 7 has recesses designed to receive lugs 24 of a backplate 2 of the brake pad 1, allowing the backplate 2 to slide axially relative to the support structure 7. During braking, vibrations and noise are generated when the brake disc 8 comes into friction with the brake pad 1. These vibrations are transmitted through the brake pad 1, and in particular through the lugs 24, into the support structure 7, which is undesirable and can be unpleasant for passengers.The present invention is a solution for damping structure-borne noise and vibrations. It includes at least one through-hole in at least one of the ears 24. This is explained in more detail below with reference to the following figures.

[0044] In Fig. 1a indicates a direction of rotation in RED, corresponding to a preferred direction of rotation, e.g., during forward movement of the vehicle. Accordingly, a leading side LEADING of the brake caliper system and brake pads can be defined, where a portion of the brake pad 8 first comes into contact with these components, and a trailing side FOLLOWING, opposite the leading side LEADING, can also be defined, where the brake disc section exits the brake caliper system and brake pads. For the brake system, including the brake caliper system and brake pads, a radial direction R and a tangential direction T can also be defined in addition to the axial direction A, based on the geometry of the brake disc, as shown in Fig. 1a shown.

[0045] Fig. Figure 2 shows a perspective view of an exemplary brake pad 1 for a disc brake system, which has a backplate 2 with a first side 21 and a second side 22 facing away from the first side 21, as well as a circumferential rim 23. The second side 22 is the back, which is in Fig. 2 is not visible; for example, it is in Fig. 3. A friction material 3 is attached to the first side 21 of the backplate 2 via a sublayer 4. The backplate 2 includes two ears 24 (highlighted by circles) at or near opposite ends of the backplate 2, the ears 24 projecting laterally beyond the friction material 3 so that they are not covered by the friction material 3. As already described in connection with Fig. As explained in Figure 1, the ears 24 are designed to engage with the supporting structure 7. At least one of the ears 24 includes at least one passage opening 25, as indicated by the dashed lines, with the passage opening 25 extending from the first side 21 to the second side 22.

[0046] Fig. Figure 3 shows a sectional view of the brake pad 8 and the brake disc 8, with some features of the brake pad 1 exposed in greater detail. A layered structure of the brake pad 1 is evident. The backplate 2, including the two lugs 24, has a substantially constant thickness of, for example, 4 mm to 6 mm. A shim 5, which may be adhesive, is attached to the second side 22 of the backplate 1. It may have a thickness of, for example, 0.6 mm to 1.2 mm. A sublayer 4, with a thickness of, for example, 2 mm to 3 mm, is attached to the first side 21 of the backplate 2, which faces the brake disc 8. A thin adhesive layer may be applied between the backplate 2 and the sublayer 4, as shown in Figure 3. Fig. Figure 3 shows the friction material 3 on the lower layer 4. In this sense, the friction material 3 is attached to the first side 21 of the back plate 2. According to the Fig. In the example shown, through-holes 25 are provided in both ears 24, interrupting the material of the backplate 2. The through-holes 25 extend completely from the first side 21 or first surface of the backplate 2 to the second side 22 or second surface of the backplate, in the area of ​​the ears 24. That is, they are through-holes in the axial direction A. It is also possible to provide one or more through-holes in only one of the ears 24, e.g., in the trailing ear or the leading ear.

[0047] The passage openings 25 may or may not be enclosed by the surrounding edge 23, as shown below with reference to the Fig. 5a-f and Fig. 6a-b is explained.

[0048] Fig. Figure 4 shows a view of the backplate 2 to provide some definitions. Visible are the surrounding rim 23 and the through-holes 25 provided in both ears 24. On the left side of Fig. Figure 4 shows a coordinate system or axes. The radial direction R points upwards, illustrating that the brake pad is positioned relative to the brake disc such that the top is the radially outer side (along a circumference of the brake disc) and the bottom is the radially inner side (along an axis of the brake disc). The axial direction A lies in the plane of the paper, and the tangential direction T, in which the brake disc rotates, is therefore horizontal. Thus, the ears 24 each have a radially inner side 26, a radially outer side 27, and a tangentially outer side 28. For example, the right side can be the leading side and the left side the trailing side. The backplate 2 can have a symmetrical configuration for the leading and trailing sides, or an asymmetrical configuration.

[0049] The Fig. Figures 5a to 5f show possible configurations of the through-holes 25. The features shown in these figures can be applied to the trailing and / or leading side. In these embodiments, the through-holes are configured as through-holes 25a, i.e., they are completely enclosed by a material of the back plate 2, with the circumferential rim 23 extending entirely around them. In the cases of Fig. Figures 5a-5f show a right-hand part of the backplate 2, including one of the ears 24. The other ear can be made in the same or a different way.

[0050] In Fig. 5a is a single elliptical through-hole 25a provided in an ear 24 of a backplate 2, wherein the through-hole 25a has a length l between 3 and 7 mm and a width w that is smaller than the length l, so that the through-hole 25a has an elongated shape. The width w is, for example, between 1 mm and 4 mm. The through-hole 25a extends longitudinally along the radial direction R.

[0051] Fig. Figure 5b shows an ear 24 of a backplate 2 with a single elliptical through-hole 25 extending longitudinally along the tangential direction T. The width w and the length l can be determined as in the case of Fig. 5a.

[0052] Fig. Figure 5c shows an ear 24 of a backplate 2 with two elliptical through-holes 25a extending longitudinally in the tangential direction T and arranged next to each other in the radial direction R. Their lengths can be determined as shown in the Fig. 5a and Fig. 5b can be selected. Their widths are chosen to fit ear 24, and their widths can, for example, range between 1 mm and 3 mm.

[0053] Fig. Figure 5d shows an ear 24 of a backplate 2 with a rectangular through-hole 25a having a length l between 3 and 7 mm and a width w that is smaller than the length l, so that the through-hole 25a has an elongated shape. The width w is, for example, between 1 mm and 4 mm. The through-hole 25a extends longitudinally along the tangential direction T.

[0054] Fig. Figure 5e shows an ear 24 of a backplate 2 with two elongated rectangular through-holes 25a extending longitudinally along the radial direction R, the two elongated through-holes 25a being arranged side by side in the tangential direction T and their length as in the case of Fig. 5d can be selected. Their widths are chosen to fit the ear 24, and their widths can, for example, range between 1 mm and 3 mm.

[0055] Fig. Figure 5f shows an ear 24 of a backplate 2 with three elongated rectangular through-holes 25a extending longitudinally along the tangential direction T, the three elongated through-holes 25a being arranged next to each other in the radial direction R. Their lengths can be determined as in the case of the Fig. 5d and Fig. 5e can be selected. Their widths are chosen to fit ear size 24, and their widths can be, for example, between 1 mm and 2 mm.

[0056] Fig. 6a and Fig. Figure 6b shows unclaimed embodiments of through-holes 25, which are designed as lateral incisions 25b that are open at the edge 23 of the back plate 2. Such lateral incisions 25b can be provided in the radially inner side 26 of the ear 24 and / or in the radially outer side 27 of the ear 24 and / or in a tangentially outer side 28 of the ear 24. The ones shown in the Fig. 6a and Fig. The features shown in section 6b may be provided on the leading side and / or on the trailing side.

[0057] Fig. Figure 6a shows a portion of the backplate 2, including the right ear 24 of the backplate 2. Two elongated lateral incisions 25b are provided in the tangential outer side 28 of the ear 24, interrupting the circumferential edge 23 on the laterally outer side 28. The lateral incisions 25b are approximately rectangular in shape, with lengths l between 3 and 5 mm, e.g., 4 mm. Their widths w are, for example, between 1 and 3 mm, e.g., 2 mm.

[0058] Fig. 6b shows the same view as Fig. 6a. In the case of Fig. 6b The right ear 24 of the backplate 2 has a total of four lateral incisions 25b, two of which are provided on the radially outer side 27 and two more on the radially inner side 26. They also have an elongated shape, approximately rectangular, with their lengths l being between 2 and 4 mm, e.g. 3 mm, and their widths w being between 1 and 3 mm, e.g. 2 mm.

[0059] It is also possible to combine one or more lateral incisions on the radially inner side and / or the radially outer side with one or more lateral incisions on the tangentially outer side. Furthermore, it is conceivable to provide one or more of these lateral incisions in combination with one or more through holes.

[0060] Fig. Figure 7 shows a portion of the backplate 2, which can be located on the leading or trailing side. The ear 24 of the backplate 2 comprises three through-holes 25, each filled with a damping medium 29 in the form of rubber or a plastic material. Two lateral incisions 25b are provided on the tangentially outer side 28, and an elongated through-hole 25a extends lengthwise in the radial direction. The dimensions of these through-holes can be selected as described in connection with the preceding figures.

[0061] Fig. 8a and Fig. Figure 8b shows asymmetrical configurations for the backplate 2. In both figures, the backplate 2 is shown together with a portion of the support structure 7, which engages with the lugs 24 of the backplate 2 during braking. The preferred direction of rotation (RED) of the brake disc is indicated below the backplate in both figures; that is, it is a counterclockwise direction, so that the right side of the backplate is the leading side (LEADING) and the left side is the trailing side (TRAILING). During braking, the lugs 24 abut the support structure, exerting forces F, indicated by arrows, on the backplate 2. Several through-holes 25 are provided in the lugs 24 for damping vibrations and noise.The exact positions of the through-holes can be determined in a method for the design of the brake pad and in particular its back plate 2, which includes a simulation of the forces, strains and stresses acting on the back plate during braking to ensure that the desired effect is achieved without compromising the stability of the back plate.

[0062] Specifically, two through-holes 25 are provided in a first ear on the leading side of the backplate 2, which are exemplified as elliptical through-holes 25a. A first through-hole 25a is located near the edge 23 of the backplate 2 on the first outer tangential side 28 of the backplate 2 at a distance of between 2 and 5 mm from the edge 23. A second through-hole 25a of the first ear is located near the edge 23 of the backplate 2 on the outer radial side 27 at a distance of 2 to 5 mm from the edge 23. Additionally or alternatively, lateral incisions may be provided in the first ear.

[0063] Furthermore, a through-hole 25 is provided in a second ear on the trailing side of the backplate 2, the through-hole configuration of which differs from that in the first ear with respect to the number of through-holes, their position, and their size. Specifically, an elliptical through-hole 25a is provided near the edge 23 on the radially inner side 26 of the backplate at a distance of between 2 and 5 mm from the edge 23.

[0064] Fig. Figure 8b shows a setup which, with regard to the position of the recesses, is similar to that of Fig. 8b is similar, however, the passage recesses are this time filled with a rubber or plastic material as a damping medium 29.

[0065] It is also possible to combine filled through-holes with a damping medium in one ear with unfilled through-holes in the other ear and / or lateral incisions in one ear with through-holes in the other ear, etc. Reference symbol list 1 brake pad 2 Backplate 21 first page 22 second page 23 Rand 24 ears 25 Passage recess 25a Through hole 25b lateral incision 26 radial inner side 27 radial outer side 28 tangential outer side 29 Damping medium 3 Friction material 4 lower class 5 Shim 7 Support structure 8 brake disc 9 brake calipers RED preferred direction of rotation LEADING leading page Trailing page F force A axial direction R radial direction T tangential direction

Claims

[1] Brake pad (1) for a disc brake system, comprising a backplate (2) with a first side (21) and a second side (22) facing away from the first side (21), wherein a friction material (3) is attached to the first side (21) of the backplate (2), the backplate (2) comprising two ears (24) at or near opposite ends of the backplate (2), the ears (24) projecting beyond the friction material (3) and being configured to engage with a support structure (7), wherein at least one of the ears (24) comprises at least one through-hole (25) provided in a material of the backplate (2) and extending from the first side (21) to the second side (22), wherein the at least one through-hole (25) comprises a through-hole (25a) which is enclosed on all sides by a material of the back plate (2), wherein at least one of the ears (24) includes at least two through holes (25a), wherein at least one through-hole (25) is provided in a first ear on the leading side of the backplate (2) and wherein at least one through-hole (25) is provided in a second ear on the trailing side of the backplate (2), wherein the first ear and the second ear have a different configuration of through-holes. [2] Brake pad (1) according to claim 1, wherein at least one of the ears (24) has at least two through-holes (25) or at least three through-holes (25) or at least four through-holes (25). [3] Brake pad (1) according to one of the preceding claims, wherein at least one of the ears (24) comprises at least three or at least four through holes (25a). [4] Brake pad (1) according to one of the preceding claims, wherein the at least one through-hole (25) comprises a lateral incision (25b) which is open at an edge (23) of the back plate (2). [5] Brake pad (1) according to claim 4, wherein the lateral cut (25b) is provided in a radially inner side (26) of the ear (24) and / or in a radially outer side (27) of the ear (24) and / or in a tangentially outer side (28) of the ear (24). [6] Brake pad (1) according to claim 4 or 5, wherein at least one of the ears (24) has at least two or at least three or at least four lateral incisions (25b). [7] Brake pad (1) according to one of the preceding claims, wherein the at least one through-hole (25) has an elongated shape. [8] Brake pad (1) according to claim 7, wherein at least one through-hole (25) is provided which extends longitudinally along a radial direction (R) and / or wherein at least one through-hole (25) is provided which extends longitudinally along a tangential direction (T). [9] Brake pad (1) according to one of the preceding claims, wherein the at least one through-hole (25) has a cross-section of at least 1 mm x 2 mm or at least 1 mm x 3 mm or at least 1 mm x 4 mm. [10] Brake pad (1) according to one of the preceding claims, wherein the at least one through-hole (25) has an elliptical shape. [11] Brake pad (1) according to one of claims 1-9, wherein the at least one through-hole (25) has a rectangular shape. [12] Brake pad (1) according to one of the preceding claims, wherein the at least one through-hole (25) is filled with a damping medium (29), such as a rubber or a plastic. [13] Brake pad (1) according to one of the preceding claims, wherein the through-holes in the first ear and the second ear differ from each other in the number of through-holes and / or the position of the through-holes and / or the type of through-holes and / or the geometry of the through-holes and / or the size of the through-holes.

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