Disk brake and brake pad arrangement, and corresponding brake pad spring and hold-down element

Abstract

The present invention relates inter alia to a brake pad arrangement, (1.1; 1.2; 22) for a disk brake, comprising a brake pad spring (7) that is designed in such a way that it is possible to clamp the brake pad arrangement (1.1; 1.2; 22) in a pad shaft (4) and also allows for a return effect after brake actuation.

Description

[0001] Disc brake and brake pad assembly as well as pad spring and hold-down element for this

[0002] The present invention relates to a disc brake, a brake pad assembly used therein and a pad spring cooperating with the brake pad assembly as well as a hold-down element for this pad spring.

[0003] In sliding calliper brakes, the sliding calliper and the brake carrier which supports it slidably together form so-called pad shafts into which the brake pads can be loosely inserted from above through an opening in the brake calliper. The back plates or brake pad holder plates of the brake pads are supported with their sides on generally vertical guide surfaces, the so-called horns, of the brake carrier with sufficiently large tolerances and on lower guide surfaces running transversely to these, so that they can slide and slide in the axial direction. The brake pad holder plates are usually freely mounted via leaf springs in relation to a hold-down element in the form of a retaining bracket which can be attached to the brake calliper, i.e.without a fixed or rigid connection, which bridges the opening in the brake calliper through which the brake pad assemblies can be inserted from above, whereby these are braced against the lower guide surfaces for the purpose of perfect guidance and, if necessary, vibration protection.

[0004] When the brake is applied, the brake pad on the application side is pressed against the brake disc, while in response the opposite, reaction side brake pad also comes into contact with the brake disc due to the opposing sliding movement of the brake calliper. At the end of the braking process, the application device and the brake pads with their brake pad holder plates must be returned to their respective original positions. While a separate return mechanism is generally provided for the application device, e.g. a return spring acting between the application device and the brake calliper or a return spring that is already functionally integrated into the latter, the prior art also provides independent devices for the brake pads which can act between the side wall of the brake shafts and the brake pad holder plates.These consist of partially pre-tensioned, differently designed spring elements which deform elastically during the braking stroke as a result of the relative movement between the brake pad holder plate and the shaft wall and can thus develop a restoring force which comes into effect at the end of the braking process when no braking force is acting any more and thus supports the brake pad holder plate in moving back.

[0005] Examples include the spring mechanisms between the brake pad holder plate and the lateral guide surfaces of the pad shaft, as known from EP 1 625 312 B1, DE 196 23 867 C2, or EP 2 644 926 B1. A spring element that partially encompasses the brake pad on both sides and is attached to a securing element of the brake calliper, which simultaneously serves to guide the brake pad holder plate, is known, for example, from EP 2 831 457 B1.

[0006] All of the aforementioned reset devices, some of which can also serve as vibration protection, have in common that they are very difficult to install. In particular, it is not possible to simply insert brake pad retaining plates equipped with such spring mechanisms into the pad wells from above without resistance or obstruction. Furthermore, structural changes to the side walls of the pad well and / or the brake pad retaining plate are sometimes necessary to enable the functionality of these spring elements in the first place, such as recesses that create undercuts, which further increase the manufacturing effort.

[0007] To solve such problems, separate devices are known from WO 2020 / 208194 A1, for example, which are designed to act separately on the lower region and the upper region of the brake pad assembly in supporting a return movement. The mechanism provided for the lower region is fixed to the brake pad holder plate, while the mechanism provided for the upper region cooperates with the hold-down element. Nevertheless, two different spring elements are necessary, which increases manufacturing costs.

[0008] Based on this, it is an object of the present invention to provide a brake pad assembly for disc brakes and a disc brake, each with improved functionality in this regard. A further object is to provide a device for resetting a brake pad that is easy to install and reliable.

[0009] This object is achieved in each case with a disc brake having the features according to claim 1, with a pad spring having the features according to claim 13, with a brake pad arrangement having the features according to claim 18 and with a hold-down element having the features according to claim 19.

[0010] In a first aspect, the invention relates to a disc brake with a brake calliper which surrounds a brake disc and is displaceably mounted on a brake carrier which has a pad shaft for receiving and guiding a reaction-side brake pad arrangement and an application-side brake pad arrangement in an axial direction with respect to the brake disc, wherein each brake pad arrangement consists of a brake pad holder plate and a brake pad arranged thereon for contact with the brake disc, with a hold-down element fastened to the brake calliper, which engages over an opening of the pad shaft transversely to the direction of rotation of the brake disc, and with a pad spring assigned to each brake pad arrangement, which rests freely with its upper end on the hold-down element and is designed such that the brake pad arrangement is clamped in the pad shaft when the pad spring is subjected to force by the hold-down element after its assembly,wherein the pad spring is fixed relative to the brake pad holder plate in the axial direction and is designed such that, as a result of contact with the hold-down element, an elastic torsional deformation is induced in the pad spring at least in sections, which causes a lever effect acting between the hold-down element and the brake pad holder plate, which is capable of assisting a return of the brake pad arrangement when the brake is released.

[0011] Preferably, the pad spring is designed as a one-piece spring wire and shaped accordingly, which extends almost over the entire width of the brake pad arrangement or the brake pad holder plate.

[0012] The pad spring can have an upper transverse region with a central abutment section that rests against the hold-down element, and on both sides thereof a connecting section that runs freely above the brake pad holder plate. This means that the connecting section has no contact with the surface of the brake pad holder plate, but rather spans it at a certain distance. Furthermore, each connecting section can extend into a leg that is received with its free end in a recess provided in the brake pad holder plate.

[0013] According to the invention, the recesses are designed in such a way that they fundamentally prevent or block any movement of the free ends in the axial direction, away from the brake pad holder plate. The axial direction generally refers to the application direction or direction of movement of the brake pad arrangements.

[0014] In one embodiment, these recesses are designed as stepped bores or blind holes in the brake pad holder plate, wherein the diameter of the spring wire in the area of ​​the free ends on the one side and the diameter of the stepped blind hole in the area of ​​its base on the other side are each provided with such tolerances that a slight press fit can be formed which holds the pad spring captively in the brake pad holder plate, so that the entire brake pad arrangement can preferably be handled as an assembled kit, but nevertheless allows the pad spring to be released, i.e. pulled out, preferably manually.

[0015] In another embodiment, these recesses can be closed in the axial direction, i.e. transversely to the brake pad holder plate, by means of a clamp or the like, receiving the free ends of the legs, which are preferably riveted to the back of the brake pad holder plate.

[0016] This means that the free ends of the legs are not fixed in their longitudinal direction, but rather their mobility across them is blocked by means of the blind holes or clamps. For assembly purposes, once the hold-down element has been removed, the pad spring can be easily inserted or removed by hand from above into the recesses without great effort.

[0017] The recesses in the brake pad holder plate can be easily milled or, ideally, incorporated during casting, since there are no undercuts. The clamps are preferably riveted to the brake pad holder plate.

[0018] Furthermore, each connecting section can be arranged offset, at least in sections, relative to the central abutment section and to the legs of the pad spring in the axial direction.

[0019] The central abutment section can have a U-shaped section which is free from the hold-down element, i.e. does not come into contact with it, and to the left and right of the legs of the U-shaped section can have a transverse section which extends into the connecting section and, according to the invention, each comes into contact with an inclined surface of the hold-down element, as will be described below.

[0020] When the middle abutment section, in particular here the cross sections on both sides of the U-shaped section, comes into contact with the retaining bracket spanning the pad shaft or the hold-down element in the assembled state of the brake pad arrangements, the pad spring is compressed in this area.

[0021] On the one hand, this has the effect that the pad spring exerts a certain pressure on the bottom of the recesses in the brake pad holder plate via its lateral legs at their free ends, so that the brake pad arrangement as a whole is tensioned in the pad shaft in order to achieve vibration-free storage when the disc brake is not actuated and perfect guidance during brake actuation.

[0022] On the other hand, according to the invention, a further, essential effect as a result of the tensioning of the pad spring is that the latter is designed and constructed in such a way with regard to its shape that an additional return effect occurs exclusively as a result of the tensioning after a brake application has taken place.

[0023] In both designs with regard to the recesses, the fact that the free ends of the legs cannot migrate in this direction due to the clamps or blind holes that close off the recesses in the brake pad holder plate in the axial direction, on the one hand, and the special shape of the wire spring and the offset between the legs and the middle abutment section, on the other hand, means that torques are induced, particularly in the connecting sections, and an elastic torsional deformation is generated in the wire spring, which is more or less intrinsic, since the pad spring remains fixed at both its free ends and its middle abutment section when installed. The resulting torsional or...Rotational forces then cause a lever effect in the legs, which subsequently leads to the free ends in the recesses of the brake pad holder plate exerting a force on the clamps fixed to it or on the inner wall of the blind holes.

[0024] The hold-down element according to the invention has at least one inclined surface on which one of the transverse sections of the pad spring is supported, the inclination being oriented such that when the brake is applied and the brake pad arrangement is therefore axially displaced, the pad spring is compressed further downwards. As a result, the induced torsional forces in the adjacent connecting section and thus the lever effect are increased. If no more braking force is exerted and the application mechanism begins to move back to its starting position by means of a return device, these rotational or torsional forces come into effect suddenly. Since the free ends can still not move out in the axial direction, the lever forces come into effect there and act as restoring forces via the clamps or the inner wall of the blind holes on the brake pad holder plate and thus support a return movement of the entire brake pad arrangement.

[0025] In a preferred embodiment, the hold-down element has two inclined surfaces which are directed towards one another and towards the centre of the opening of the pad shaft on the brake disc, wherein one inclined surface is assigned to the brake pad arrangement on the application side and one inclined surface is assigned to the brake pad arrangement on the reaction side in such a way that at least one transverse section of the pad spring on the application side comes to bear on the inclined surface on the application side and at least one transverse section of the pad spring on the reaction side comes to bear on the inclined surface on the reaction side.

[0026] Preferably, the reaction-side inclination surface is steeper than the application-side inclination surface, wherein the application-side inclination surface has an inclination such that an adjustment of the application-side brake pad arrangement with respect to pad wear can always be ensured.

[0027] The two inclined surfaces, whose respective directions of inclination are oriented opposite one another, so to speak, can be provided in a central longitudinal region of the hold-down element. Preferably, these two inclined surfaces are each arranged on a wall or a fold on either side of a flat longitudinal surface of the hold-down element, which is particularly intended for the embodiment of the pad spring with a U-shaped section, which itself is not in contact with the longitudinal surface, but only the transverse sections with the inclined surfaces.The exposed U-shaped section extends in the same direction as the connecting sections, which are offset from the transverse sections adjacent to the hold-down element and from the legs, thereby increasing the stability of the pad spring in the assembled state, as this prevents the upper transverse area from deflecting or tipping away during a relative movement of the pad spring relative to the hold-down element. This ensures that the torsional deformation necessary for the restoring effect can always occur to a sufficient degree in the connecting sections.

[0028] The present invention relates in further aspects to a pad spring as such with the different designs described above and to a hold-down element as such with the corresponding inclined surfaces.

[0029] In particular, the present invention relates to a brake pad arrangement comprising a brake pad holder plate and a brake pad arranged thereon for a disc brake having a pad spring according to one of the previously described embodiments.

[0030] The pad spring according to the invention has the advantage that it can be manufactured simply and therefore inexpensively using spring wire. Since the pad spring does not rest against the horns and / or the base surfaces of the pad shaft and the outside of the brake pad holder plate, but acts directly between them, no cost-intensive design of these surfaces in the pad shaft is necessary. The recesses in the brake pad holder plate can also be manufactured simply. The hold-down element with the respective inclined surfaces can be manufactured inexpensively as a sheet metal part.As a result of the use of a simply designed pad spring, a simply designed hold-down element and a simply designed brake pad holder plate, both in terms of construction and in terms of their functional interaction, simple assembly and disassembly of the brake pad arrangement according to the invention is made possible, wherein said arrangement is constructed identically for the application side and the reaction side. The brake pad arrangement consisting of brake pad with brake pad holder plate and pad spring attached or incorporated thereon can therefore be offered independently as a kit, even for retrofitting purposes, and can be handled manually.

[0031] Further features and advantages of the invention will become apparent from the following description of the exemplary embodiments illustrated with reference to the accompanying drawings. They show:

[0032] Fig. 1 schematically shows a perspective view of a brake pad assembly with a pad spring according to the invention in a first embodiment;

[0033] Figures 2a, b and c schematically show different views of a pad spring according to the invention;

[0034] Fig. 3 is a partial sectional view through a brake calliper of a disc brake without a brake disc with brake pad arrangements according to the invention;

[0035] Fig. 4a from above a perspective view of a

[0036] hold-down element according to the invention;

[0037] Fig. 4b from below a perspective view of the

[0038] hold-down element according to the invention;

[0039] Fig. 5a schematically shows the relative arrangement of the two brake pad assemblies on the hold-down element;

[0040] Fig. 5b is an enlarged view of the relative arrangement of the two brake pad assemblies on the hold-down element; Fig. 6 is a perspective view similar to Fig. 1 to illustrate the forces occurring;

[0041] Fig. 7 is a perspective view of a brake pad assembly with a pad spring according to the invention in a second embodiment; and

[0042] Fig. 8 is a sectional view of the brake pad holder plate of this embodiment.

[0043] Figure 1 shows an example of a brake pad arrangement according to the invention, which can be used both as an application-side brake pad arrangement 1.1 and as a reaction-side brake pad arrangement 1.2 in a brake calliper 2 of a disc brake, as shown in Fig. 3.

[0044] The brake caliper 2 is a sliding caliper that is slidably guided on a caliper or brake carrier 3. In a known manner, such a disc brake has a pad shaft 4 of the brake carrier 3, in which the brake pad assemblies 1.1 and 1.2 are slidably guided such that, upon brake application by means of an application device 5 accommodated in the brake caliper 2, the application-side brake pad assembly 1.1 is advanced onto a brake disc (not shown here). Upon braking intervention, as a result of the equilibrium of forces, the reaction-side brake pad assembly 1.2 is also advanced onto the brake disc in the opposite direction via a sliding displacement of the brake caliper 2 on the brake carrier 3. The advance direction of the brake pad assemblies 1.1 and 1.2 also defines their axial direction within the meaning of this invention.

[0045] The pad shaft 4 is spanned by a retaining bracket or hold-down element 6 which can be fastened to the brake calliper 2 in a known manner and on which the brake pad assemblies 1.1 and 1.2 are each supported in a known manner by means of a pad spring 7 according to the invention.

[0046] In the embodiment shown here, the pad spring 7 is identical in construction for the application-side brake pad arrangement 1 .1 and the reaction-side brake pad arrangement 1.2.

[0047] As shown in Fig. 1, a brake pad arrangement 1.1 or 1.2 in a first embodiment consists of a brake pad holder plate 8 on which a brake pad 9 is attached.

[0048] Opposite the brake pad 9, the brake pad holder plate 8 has a recess 10 near its lateral edges, which is open towards the rear.

[0049] As Figures 2a to 2b show, the pad spring 7, which is formed or bent as a one-piece spring wire with a corresponding wire thickness, has an upper transverse region 11.

[0050] The upper transverse section 11 has a central abutment section 12 and a connecting section 13 symmetrically arranged on both sides thereof.

[0051] As can be seen in Fig. 1, the two connecting sections 13 run freely, ie with a certain distance, even in the assembled state of the brake pad arrangement 1.1 or 1.2, above the brake pad holder plate 8 and the brake pad 9.

[0052] The two connecting sections 13 each merge into two legs 14, which are aligned substantially perpendicular to the central abutment section 12 and terminate in free ends 15. As can be seen in Fig. 1, the legs 14 are received or guided in the recesses 10 with play and extend all the way down. The recesses 10 each have an enlarged section 16 at their base.

[0053] These extended sections 16 serve to accommodate sleeves or clamps 17 or the like, which can be inserted into the extended sections 16 from the rear and are riveted captively to the brake pad holder plate 8. These clamps 17 form a downwardly closing receiving space for the free ends 15, which come to rest on the base there. Alternatively, the free ends 15 can also come to rest directly on the base of the recess 10 and be prevented from moving backwards, counter to the axial direction, virtually out of the recess 10, by a substantially U-shaped clamp 17.

[0054] In this embodiment, the legs 14 lie with their free ends 15 freely in the recess 10 and the clamp 17, i.e. the pad spring 7 can be easily pushed in or plugged in from above and also pulled out again, and can thus be easily handled manually. The pad spring 7 is ultimately held captively in place by the fact that it is supported on the hold-down element 6, as a result of which the free ends 15 of the legs 14 exert downward compressive forces on the base of the recess 10 or the base of the riveted clamp 17, as a result of which the brake pad arrangement 1 . 1 or 1 . 2 as a whole is clamped in the pad shaft 4.

[0055] Figures 4a and 4b show, by way of example, a hold-down element in the form of a retaining bracket 6, which spans the pad shaft 4 and can be fastened to the brake caliper 2 in a known manner (Fig. 3). The retaining bracket 6, which is generally punched and bent from sheet metal, has an identically shaped fold or edge 18 on both sides in the longitudinal direction. The edge 18 is shaped such that it has an application-side inclined surface 19.1 and a reaction-side inclined surface 19.2.

[0056] The inclination of the application-side inclination surface 19.1 is flatter than that of the reaction-side inclination surface 19.2.

[0057] As can be seen in Fig. 2b, the central abutment section 12 has a U-shaped section 20, the legs of which on the left and right each merge into a transverse section 21.

[0058] The pad spring 7 is designed in such a way that only these transverse sections 21 are supported on the application-side inclined surface 19.1 and on the reaction-side inclined surface 19.2, while the U-shaped section 20 is exposed below it opposite the retaining bracket 6.

[0059] According to the invention, the design of the pad spring 7, i.e. the three-dimensional course of the spring wire, on the one hand and the support of its transverse sections 21 on the respective inclined surfaces 19.1 and 19.2 as well as the support of its free ends 15 in the recesses 10 on the other side, causes that in the assembled state, i.e. when the pad spring 7 is supported on the retaining bracket 6, forces and torques are induced in the pad spring 7, which are illustrated in Fig. 6.

[0060] Because the pad spring 7 is supported on the retaining bracket 6 via its transverse sections 21, downward-acting compressive forces FH are exerted, which are introduced via the free ends 15 into the bottom of the recesses 10 or the clamps 17 and thereby into the brake pad holder plate 8, whereby the latter is clamped in the pad shaft 4 via its corresponding sliding surfaces of the brake carrier 3.

[0061] Since the free ends 15 are prevented from axial movement by the clamps 15 or a drill-like recess (see Fig. 7), compression of the pad spring 7 ultimately leads to a torque M being introduced into the exposed connecting sections 13, since these are not supported on any abutment. This torque M in turn produces an elastic torsional deformation, which is virtually intrinsic to the spring wire, and thus a lever effect on the free ends 15 of the legs 14, the resulting force of which manifests itself in a restoring force FR as soon as the brake pad arrangement is no longer advanced. This restoring force FR acts via the clamps 17 or the drill hole on the brake pad holder plate 8 in such a way that the brake pad arrangement 1. 1 or 1. 2 is supported, since the pad spring 7 is still sufficiently pressed against the

[0062] Support bracket 6 .

[0063] Since the brake pad arrangement 1 . 1 on the application side, taking into account the necessary adjustment of pad wear over time, must generally cover a greater distance than the brake pad arrangement 1 . 2 on the reaction side, the inclined surface 19 . 1 on the application side is designed to be flatter. The inclined surface 19 . 2 on the reaction side is inclined in such a way that the brake pad arrangement 1 . 2 on the reaction side is at least held reliably in its position in the pad shaft 4 and, in comparison to the smaller adjustment path due to the relative movement of the brake calliper 2, still ensures sufficient support for resetting.

[0064] Figures 7 and 8 show a further embodiment of a brake pad arrangement 22 according to the invention, which can also be used on the application side or the reaction side.

[0065] Compared to the previously described embodiment, this brake pad arrangement 22 differs in that the recess for the legs of the pad spring 7 is designed as a stepped hole 23, which can be introduced into the brake pad holder plate 24 during casting. The stepped hole 23 tapers in the lower section to a diameter which, compared to the diameter of the spring wire of the free ends 15, is provided with such tolerances that a slight press fit is formed, which is able to hold the pad spring 7 captively on the brake pad holder plate 24, yet can still be released manually.

Claims

Claims 1. Disc brake with a brake calliper (2) encompassing a brake disc, which is displaceably mounted on a brake carrier (3) which has a pad shaft (4) for receiving and guiding a reaction-side brake pad arrangement (1.2) and an application-side brake pad arrangement (1.1) in an axial direction with respect to the brake disc, wherein each brake pad arrangement (1.1; 1.2; 22) consists of a brake pad holder plate (8) and a brake pad (9) arranged thereon for contact with the brake disc, with a hold-down element (6) fastened to the brake calliper (2) which forms an opening of the pad shaft (4) transversely to the direction of rotation of the brake disc, and with a pad spring (7) assigned to each brake pad arrangement (1.1; 1.2; 22), which rests freely with its upper end on the hold-down element (6) and is designed such that the brake pad arrangement (1.1; 1.2; 22) is braced in the pad shaft (4) when the pad spring (7) is subjected to force by the hold-down element (6) after its assembly, characterized in that the pad spring (7) is fixed relative to the brake pad holder plate (8) in the axial direction and is designed such that as a result of contact with the hold-down element (6) in the pad spring (7), at least in sections, an elastic torsional deformation is induced, which causes a lever action acting between the hold-down element (6) and the brake pad holder plate (8), which is capable of restoring the to support the brake pad arrangement (1.1; 1.2; 22).

2. Disc brake according to claim 1, wherein the pad spring (7) an upper transverse region (11) with a central abutment section (12) which comes into contact with the hold-down element (6) and, on both sides thereof, has a connecting section (13) which runs freely above the brake pad holder plate (8).

3. Disc brake according to claim 2, wherein each connecting portion (13) extends into a leg (14) which is received with its free end (15) in a recess (10; 23) provided in the brake pad holder plate (8; 24).

4. Disc brake according to claim 3, wherein the recess (10; 23) is designed such that the free ends (15) lie freely therein or are received with a defined fit.

5. Disc brake according to claim 3 or 4, wherein the recesses (10; 23) are designed to block the free ends (15) with respect to movement in the axial direction.

6. Disc brake according to claim 5, in which the recesses (10) are arranged in the axial direction by means of a clamp (17) Receiving the free ends (15) of the legs (14) are closed or that the recesses (23) are each designed as a stepped bore in the brake pad holder plate (8).

7. Disc brake according to one of claims 2 to 6, wherein each connecting section (13) is arranged at least partially offset in the axial direction relative to the central abutment section (12) and to the legs (14) of the pad spring (7).

8. Disc brake according to one of claims 2 to 7, wherein the central abutment section (12) has a U-shaped section (20) which is opposite the hold-down element (6) is exposed, and to the left and right of the legs of the U-shaped section (20) has a transverse section (21) which extends into the connecting section (13) and in each case comes to bear against an inclined surface (19.1; 19.2) of the hold-down element (6).

9. Disc brake according to claim 8, in which the hold-down element (6) has two inclined surfaces (19.1; 19.2) which are directed towards one another and towards the centre of the opening of the pad shaft (4) on the brake disc, wherein one inclined surface (19.1) is assigned to the brake pad arrangement (1.1) on the application side and one inclined surface (19.2) is assigned to the brake pad arrangement (1.2) on the reaction side such that at least one transverse section (21) of the pad spring (7) on the application side comes to bear on the inclined surface (19.1) on the application side and at least one transverse section (21) of the pad spring (7) on the reaction side comes to bear on the inclined surface (19.2) on the reaction side.

10. Disc brake according to claim 9, wherein the reaction-side inclination surface (19.2) is steeper than the application-side inclination surface (19.1).

11. Disc brake according to claim 9 or 10, wherein the application-side inclined surface (19.1) has an inclination such that adjustment of the application-side brake pad arrangement (1.1) is ensured at all times.

12. Disc brake according to one of claims 1 to 11, wherein the pad spring (7) is designed as a one-piece spring wire.

13. Pad spring (7) for a brake pad assembly (1.1; 1.2; 22) of a disc brake, comprising a brake pad holder plate (8) and a brake pad (9) arranged thereon, wherein the pad spring (7) is designed to brace the brake pad assembly (8) in a pad shaft (4) of a brake carrier (3) for a brake caliper (2) of the disc brake, in that the pad spring (7) is freely supported on a hold-down element (6) which engages over an opening of the pad shaft (4), wherein the pad spring (7) is designed as a one-piece spring wire, and wherein the pad spring (7) is further designed such that, as a result of contact with the hold-down element (6), an elastic torsional deformation is induced in the pad spring (7) at least in sections, which elastic torsional deformation produces a lever effect acting between the hold-down element (6) and the brake pad holder plate (8). which is capable of causing the brake pad assembly (1.1; 1.2; 22).

14. Pad spring (7) according to claim 13, wherein the pad spring (7) has an upper transverse region (11) with a central abutment section (12) which is designed to bear against the hold-down element (8), and on both sides thereof a connecting section (13) extending freely above the brake pad holder plate (8).

15. Pad spring (7) according to claim 14, wherein each connecting portion (13) extends into a leg (14) with a free end (15) which is designed to be received in a recess (10; 23) provided in the brake pad holder plate (8).

16. Pad spring (7) according to claim 14 or 15, wherein each connecting section (13) is arranged offset in the axial direction at least in sections relative to the central abutment section (12) and to the legs (14).

17. Pad spring (7) according to one of claims 14 to 16, wherein the central abutment section (12) has a U-shaped section (20) which is designed to be exposed relative to the hold-down element (6), and to the left and right of the legs of the U-shaped section (20) has a transverse section (21) which is designed to extend into the connecting section (13) and to come into contact with an inclined surface (19.1; 19.2) of the hold-down element (6).

18. Brake pad arrangement (1.1; 1.2; 22) consisting of a brake pad holder plate (8) and a brake pad (9) arranged thereon for a disc brake having a pad spring (7) according to one of claims 13 to 17.

19. A hold-down element (6) for a disc brake, which is designed to span an opening of a pad shaft (4) in the disc brake and to form an abutment for a pad spring (7) for bracing a brake pad arrangement (1.1) on the application side and an abutment for a pad spring (7) for bracing a brake pad arrangement (1.2) on the reaction side in the pad shaft (4), characterized by two inclined surfaces (19.1; 19.2) which are directed towards each other and towards the center of the opening of the pad shaft (4) on a brake disc, wherein an inclined surface (19.1) is designed to bear against at least one section (21) of the application-side pad spring (7) and the other inclined surface (19.2) for the application of at least one section (21) of the reaction-side pad spring (7).

20. The hold-down element (6) according to claim 19, wherein one of the inclined surfaces (19.2) is steeper than the other inclined surface (19.1).

21. The hold-down element (6) according to claim 19 or 20, wherein the two inclined surfaces (19.1; 19.2) are each arranged on a wall (18) on either side of a flat longitudinal surface of the hold-down element (6).

Images