WO2016046065A1

WO2016046065A1 - Brake pad holder of a disk brake, disk brake and brake pad

Info

Publication number: WO2016046065A1
Application number: PCT/EP2015/071388
Authority: WO
Inventors: Schönauer SCHÖNAUER; Josef Schropp
Original assignee: Knorr-Bremse Systeme für Nutzfahrzeuge GmbH
Priority date: 2014-09-22
Filing date: 2015-09-18
Publication date: 2016-03-31
Also published as: EP3198165A1; DE102014113617A1

Abstract

A brake pad holder is described for a disk brake of a motor vehicle, in particular a utility vehicle, wherein a brake pad (2) arranged on at least one side of a brake disk is spring-loaded in a pad shaft of a stationary brake support (1) having horns (12, 13) which laterally frame the brake pad (2), where the brake pad (2) comprises at least one friction lining (22) and a pad-supporting plate (21) that carries the friction lining (22), a projection (23) extends from an edge of the pad-supporting plate (21) on the inlet side and extends into a lateral recess (14) of a supporting horn (12) of the brake support (1) on the inlet side, in the mounted state of the brake pad (2), a spring element (3) with two resilient ends (31, 32) is arranged between the edge of the pad-supporting plate (21) on the inlet side and the brake-supporting horn (12) on the inlet side, a first end (31) of the spring element (3) is designed to support the brake pad (2) radially in relation to the axis of rotation of the brake disk, against a root region of the support horn (12) on the inlet side, which root region is close to an axis of rotation of the brake disk, and a second end (31) of the spring element (3) is designed to support the brake pad (2) radially in relation to the axis of rotation of the brake disk, against a head region (16) of the support horn (12) on the inlet side, which head region (16) is remote from the axis of rotation of the brake disk. Also described is a disk brake and a brake pad of a disk brake of a motor vehicle.

Description

Brake pad holder of a disc brake, disc brake and

brake lining

The present invention relates to a brake pad holder of a disc brake of a motor vehicle, in particular a commercial vehicle, according to the preamble of claim 1 and a disc brake and a brake pad.

In today's conventional disc brakes with floating brake caliper of the caliper is usually performed by means of a floating bearing and a fixed bearing against a brake carrier attached to a vehicle body. The brake caliper bearing constructed in this way absorbs both the braking torques arising during a braking operation and acceleration forces resulting from vibrations.

To hold brake pads of these disc brakes, it is known to keep the brake pads in a lining shaft of the brake carrier between the inlet side and outlet side brake carrier horns of the brake carrier. During a braking process, the brake linings are based on these brake carrier horns, depending on the direction of rotation of the brake disc. As the inlet-side carrier horn while the rear carrier horn is called in a main direction of rotation of the brake disc, so the direction of rotation of the brake disc during a forward drive of the motor vehicle. Accordingly, the front carrier horn is referred to as the outlet side carrier horn in a main direction of rotation of the brake disc, so the direction of rotation of the brake disc during a forward drive of the motor vehicle.

The known from the prior art brake pads usually have on their side facing away from the axis of rotation of the brake disc upper edge of a pad retaining spring, which is supported via a lining shaft opening of the brake caliper spanning pad holder radially outward.

This pad retaining spring serves on the one hand to compensate for tolerances occurring and for damping the brake pads to protect against jerky load that can damage the connection of the friction mass to the lining carrier plate. The pad retaining springs also serve to reduce rattling noise of the brake pads during driving. In the absence of the movable bearing between the caliper and the brake carrier and the simultaneous connection of the brake caliper with the brake pads or the brake pads would also contribute to the above-mentioned forces acting on the respective support surfaces between the brake pad and brake carrier, in particular as reaction force in Rüttelbelas- lines.

The case occurring high surface pressures would lead to an incorporation of the support surfaces of the brake pads and the brake carrier, which would prevent free displacement of the brake pads on actuation of the disc brake, but also with a wear adjustment.

This would be accompanied by an uneven pressing of the brake pads to the brake disc, which would be accompanied by increased radial oblique wear, especially the brake pads, as well as a non-uniform application of force relative to the brake disc.

In order to prevent such an oblique wear, the brake carrier would have to be replaced, which would be associated with high material and processing costs. In order to prevent digging of the brake pads in the contact surfaces of the brake carrier, it is known to harden the brake carrier horns. However, this measure is associated with a high production and cost. In addition, this method can lead to a distortion of the brake carrier, which would jeopardize the maintenance of function-relevant tolerances and, where possible, would result in a more difficult mounting of the brake.

Regarding the suspension of the brake pads, today's pad spring systems are geared to dampen the mass of the brake pads themselves, also with regard to the available installation space of the brake pads in the lining shaft.

It is important that the error rates of these pad spring systems are not selected too high, so that the brake pads are easily movable in the lining shaft to avoid increased pad wear in the unactuated state and also to ensure easy displacement of the caliper, to avoid a different wear between the inside and externally mounted brake pads.

Thus, from WO 2013/037876 A1 a disc brake is known in which by a special shape of the brake pads and the wearer carrier of the brake carrier and the kinematic design and the ratios of the attacking force components, these disc brakes are able to brakes in both the brakes discontinuously positioned brake carrier horns as well as via a positive connection directly into the einlaufsei- positioned brake carrier horns or detours via friction and higher reaction forces in the brake or the brake carrier to initiate. By this positive connection between the brake pad and the brake carrier on the inlet side carrier horn can be prevented at a forward braking decelerating braking operation with simultaneous positive connection of the caliper with at least one of the brake pads.

Object of the present invention is to develop a generic brake pad holder such that with an acceptable bias of the brake pads both a slight displaceability of the caliper is guaranteed as well as an acceptable damping of the caliper and a To ensure protection of the heavily loaded support surfaces between the brake pads and the brake carrier horns.

This object is achieved by a brake pad holder with the features of claim 1 and by a disc brake with the features of claim 14 and by a brake pad having the features of claim 15.

In the brake pad holder according to the invention a disc brake of a motor vehicle, in particular a commercial vehicle, a brake pad is spring-loaded on at least one side of a brake disc, a brake pad in a lining shaft of a stationary brake carrier with the brake lining laterally enclosing brake carrier horns. The brake pad has at least one friction lining and a lining carrier plate carrying the friction lining. From an inlet-side edge of the lining carrier plate, a projection which projects in the assembled state of the brake lining in a lateral recess of an inlet-side carrier horn of the brake carrier extends.

Between the inlet-side edge of the lining carrier plate and the inlet side Bremsträgerhorn a spring element is arranged with two elastic ends. A first end of the spring element is designed so as to support the brake pad radially relative to an axis of rotation of the brake disc close foot region of the inlet side carrier horn to the axis of rotation of the brake disc. A second end of the spring element is designed to support the brake pad with respect to a rotational axis of the brake disc remote support the head portion of the inlet side carrier horn radially to the axis of rotation of the brake disc.

The arrangement of the spring element between the inlet side edge of the lining carrier plate and the inlet side Bremsträgerhorn in particular the contact surface of the brake carrier is reliably protected against excessive wear. By the two resiliently shaped ends of the spring element damping in case of shocks both the brake pad itself and the additional mass of the caliper in case of elimination of a movable bearing between the brake caliper and the brake carrier is taken into account.

Advantageous embodiments of the invention are the subject of the dependent claims. According to an advantageous embodiment of the invention, the spring element is positively or non-positively fixed to the inlet side carrier horn. For this purpose, two of the inlet side carrier horn encompassing first tabs are particularly preferably formed. Such tabs can be formed on the spring element in a simple manner. In addition, as a simple assembly and management of the spring element on the inlet side carrier horn allows. The first end of the spring element is preferably supported in the mounted state on one of the axis of rotation of the brake disc facing functional surface of the lining carrier plate as functional surfaces serve preferably the axis of rotation of the brake disc facing bottom of the projection and / or a region of the lining carrier plate, which extends below the projection for the axis of rotation of the brake disc facing the lower edge of the lining carrier plate extending toward.

The second end of the spring element is preferably formed bent in the head region of the inlet side carrier horn. In the unloaded state is the second end of the spring element on the head portion of the inlet side carrier horn while it just bent in the loaded state against the spring force of the second end between the head portion of the inlet side carrier horn and the edge of the brake pad 2 rests and so not alone from the first end of the spring element Catchable vibrations dampened.

The spring element is formed according to a further preferred embodiment as a leaf spring or wire spring and thus easy and inexpensive to produce and particularly suitable for installation in a narrow gap between the inlet side carrier horn and the inlet side horn facing side horn of the brake pad.

To exert a spring effect, the first end of the spring element is preferably arc-shaped, in particular s-shaped. In order to prevent jamming of the brake lining in the brake carrier with strong vibrations, a head region of the intake side Bremsträgerhorns near edge of the lining carrier plate is formed with a radially from the brake carrier horn radially from the axis of rotation of the brake disc increasingly removing contour. According to a further preferred embodiment, the spring element in the application direction of the brake pad is slidably fixed to the lining carrier plate. This has the advantage that with each brake pad change a new spring element must be mounted necessarily, and thus optimal function of the caliper guide over the life of the brake is guaranteed.

In order to fix the spring element on the lining carrier plate, two second lugs embracing the lining carrier plate are preferably formed on the spring element. These tabs preferably have holes for receiving a fixed to the lining carrier plate connecting element.

Alternatively, the spring element has a slot-shaped recess in the application direction of the brake lining for receiving a connecting element fixed to the lining carrier plate.

In order to minimize wear of the spring element itself, the surface of the spring element is hardened according to a further advantageous embodiment variant. This results in the area of the brake carrier horns, which are preferably made of cast material, a further improved protection against burial.

The disc brake according to the invention of a motor vehicle, in particular of a commercial vehicle, is distinguished by the brake pad holder having the abovementioned features.

The brake pad according to the invention of a disc brake of a motor vehicle, in particular a commercial vehicle, which has a friction lining and a lining carrier plate carrying the friction lining and in which a projection extends from an inlet side edge of the lining carrier plate, which in the assembled state of the brake lining in a lateral recess of a einlaufseiti - Gen Trägerhorns a brake carrier of the disc brake projects, is characterized in that on the inlet side edge of the lining carrier plate, a spring element is arranged with two elastic ends. In this case, a first end of the spring element is designed such that it supports the brake lining with respect to a rotational axis of a brake disc near foot region of the inlet side carrier horn radially to the axis of rotation of the brake disc. The second end of the spring element is designed in such a way, the brake pad relative to a head portion remote from an axis of rotation of the brake disc support the inlet side carrier horn radially to the axis of rotation of the brake disc.

Exemplary embodiments of the invention will be explained in more detail below with reference to the enclosed drawings. Show it:

FIG. 1 shows a side view of a detail of a disk brake with a brake carrier and a brake pad mounted between carrier horns of the brake carrier,

FIG. 2 is a perspective view of that shown in FIG

Brake pads with this arranged variant of a spring element, Figure 3a and 3b different perspective views of the in FIG

3, in a state mounted on respective brake carrier horns, a perspective view of a brake lining with an alternative embodiment variant of a spring element arranged thereon, a perspective view of the spring element shown in FIG.

Figure 7 is a perspective view of a brake pad with assumed spring element.

In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc. refer exclusively to the example representation and position of the brake pad holder, the brake pad, the brake carrier, the brake carrier horns, the brake pads, and carrier plate, the spring element and the like. These terms are not intended to be limiting, that is to say, by different working positions or the mirror-symmetrical design or the like, these references may change. In FIG. 1, the reference numeral 1 designates a brake carrier of a disc brake of a motor vehicle, in particular of a commercial vehicle, the brake carrier 1 essentially comprises a base body 11 and carrier horns 12, 13 arranged on the outlet side and outlet side, between which Brake pad 2 is held.

The brake pad 2 has at least one friction lining 22 and a lining carrier plate carrying the friction lining 22, as shown by way of example in FIG. At a rotational axis a (not shown) disc brake disc facing away from the edge 28 of the lining carrier plate 21 is a lining holder spring 4 is verliergesichtert and held radially deflectable. This pad retaining spring 4 is here, contrary to the usual positioning centered on the edge 28 of the pad carrier plate 21 here in the region of the outlet side carrier horn 13 facing half of the edge 28 of the pad carrier plate 21 positioned. This pad retaining spring 4 is supported radially upwards on a pad retainer (also not shown) spanning the pad shaft of a caliper, not shown, which is detachably fixed to a brake caliper, not shown, of the disc brake, for example. The brake carrier 1 itself is fixedly mounted on the vehicle housing or a component of the vehicle axle. The brake disk (not shown) rotates together with a wheel axle of the motor vehicle during a forward movement of the motor vehicle in a main direction of rotation D. As can also be seen in FIG. 1, a spring element is disposed between the inlet side edge of the lining carrier plate 21 and the inlet side brake horn 12 3 arranged. This spring element 3 has two elastic ends 31, 31, which are connected to each other by one of the contour of the inlet-side edge of the lining carrier plate 21 following Mitteilteil. The spring element 3 is designed as a leaf spring in the embodiment variant shown here. Also conceivable is the design of the spring element 3 as a wire spring.

At the inlet-side edge of the lining carrier plate 21 there extends a projection 23 which, in the assembled state of the brake lining 2, protrudes into a lateral recess 14 of the inlet-side carrier horn 12 of the brake carrier 1, so that the brake lining 2 is moved by a pivoting movement into the running side carrier horn 12 and the outlet side carrier horn 13 in the circumferential direction of the brake disc limited lining shaft of the brake carrier is used. By the projection 23 on the lining carrier plate 21, a unscrewing of the brake pad during a braking operation is prevented. For resilient support of the brake pad, the first end 1 of the spring element is designed to support the brake pad 2 with respect to an axis of rotation of the brake disc near foot region 15 of the inlet side carrier horn 12 radially to the axis of rotation of the brake disc. In this case, this first end 31 of the spring element 3 is preferably arcuate, in particular S-shaped.

As shown, for example, in FIGS. 1 and 2, an end piece of the first end 31 is supported on a functional surface 27 of the carrier plate 21. In this case, this functional surface 27 is formed as a slightly beveled region extending towards the inlet-side edge of the lining carrier plate 21, in relation to the circumference of the brake disk extending towards the rotational axis of the brake disk.

Another functional surface 26 of the carrier plate is formed by the underside of the projection 23 facing the axis of rotation of the brake disk, against which a supporting surface 36 of the spring element 3 abuts. Between the support surface 36 and the voltage applied to the functional surface 27 tail of the spring element 3, the spring element is bent here s-shaped, the lower arc rests on the foot portion 15 of the inlet side carrier horn 12 and thereby the brake pad 2 on the inlet side Bremsträgerhorn 12 resiliently supported.

In order to cushion the impact of the brake pad 2 on the foot region 15 of the inlet side carrier horn 12 even in the case of strong vibrations, a second end 31 of the spring element 3 is designed to radially displace the brake pad 2 against a head region 16 of the inlet side carrier horn 12, which is remote from an axis of rotation of the brake disc Support the axis of rotation of the brake disc.

The second end 32 of the spring element 3 is, as can be clearly seen in FIGS. 1 and 2, formed bent toward the head region 16 of the inlet-side carrier horn 12.

The second end 32 is in the unloaded state at the head portion 16 of the inlet side carrier horn. In the loaded state, the second end 32 is pressed against the spring force of the second end 32 just bent between the head portion 16 of the inlet-side carrier horn 12 and the edge of the brake pad 2. Since the second end 32 of the spring element 3 is particularly preferably designed to be relatively short, a significantly higher force is required for straight bending of this bent second end 32 than for deformation of the first end 31 of the spring element 3. Thus, a total of two-step cushioning of the brake pad 2 by the Spring element 3 allows.

As shown in Figures 1 to 6, the spring element 3 is positively or non-positively fixed to the inlet side carrier horn 12. For this purpose, according to the preferred embodiment shown here on the spring element 3 two the inlet side carrier horn 12 embracing first tabs 35 are integrally formed.

In order to prevent jamming of the lining carrier plate 21 when the second end 32 of the spring element 3 is pressed in between the inlet-side carrier horn 12 and the edge of the lining carrier plate 21 facing it, as can be seen in FIGS. 1, 2, 5 and 7, the head region 16 of the inlet side Bremsträgerhorns 12 near edge of the lining carrier plate 21 with a radially from the brake carrier horn 12 radially from the axis of rotation of the brake disc increasingly removing contour 29, for example in the form of a chamfer. According to a further preferred embodiment of the spring element 3, shown in Figures 2, 5 and 6, the spring element 3 in the application direction Z of the brake pad 2 slidably on the lining carrier plate 21 can be fixed.

For this purpose, according to an embodiment variant shown in FIG. 2, a slot-shaped recess 39 extending in the application direction Z of the brake pad 2, in particular in the form of an elongated hole, is provided on a surface piece 34 of the spring element 3 resting on the inlet side edge of the lining carrier plate 21. In this slot-shaped recess 39 is fixed to the lining carrier plate 21 connecting element 5 with a head piece whose diameter is greater than the slot width of the slot 39, is added.

As a result, with increasing wear of the friction lining 22, a displacement of the lining carrier plate 21 relative to the spring element 3 held stationary in the application direction Z is made possible. In an alternative embodiment, shown in Figure 5, a second tab 37 is formed on the Abstütz- surface 34 of the spring element 3, which surrounds the lining carrier plate 21 of at least one side.

Again, a connecting element 5 is fixed in the lining carrier plate 21, in this case on a side parallel to the friction surface of the brake disc back of the lining carrier plate, which is received in a bore 38 of the second tab 37.

Here, the second tab 37 with increasing wear of the friction lining 22 from the friction lining 22 facing away from the rear side of the support plate 21 continue to remove.

LIST OF REFERENCES

1 brake carrier

1 1 basic body

12 inlet side carrier horn

13 outgoing carrier horn

14 recess

15 foot area

16 head area

2 brake pad

21 lining carrier plate

22 friction lining

23 advantage

26 functional area

27 functional area

28 edge

29 contour 3 spring element

31 elastic end

32 elastic end

34 surface piece

35 first tabs

36 support surface

37 second tab

38 bore

39 recess 4 pad retaining spring

5 connecting element

D main direction of rotation

Z Zuspannrichtung

Claims

claims

Brake pad holder of a disc brake of a motor vehicle, in particular a commercial vehicle, wherein on at least one side of a brake disc, a brake pad (2) in a lining shaft of a stationary brake carrier (1) with the brake pad (2) laterally bordering Bremsträgerhörnern (12, 13) is spring-loaded, wherein the brake lining (2) has at least one friction lining (22) and a lining carrier plate (21) carrying the friction lining (22), wherein a projection (23) extends from an inlet-side edge of the lining carrier plate (21), which in the assembled state of the brake lining

(2) in a lateral recess (14) of an inlet side carrier horn (12) of the brake carrier (1) projects, characterized in that between an inlet side edge of the lining carrier plate (21) and the inlet side Bremsträgerhorn (12) has a spring element

(3) with two spring-elastic ends (31, 32) is arranged, wherein a first end (31) of the spring element (3) is designed, the brake pad (2) opposite to a rotational axis of the brake disc near the foot region (15) of the inlet-side carrier horn ( 12) radially to the axis of rotation of the brake disc support and a second end (31) of the spring element (3) is designed, the brake pad (2) relative to a rotational axis of the brake disc remote head portion (16) of the inlet side carrier horn (12) radially to the axis of rotation of the brake disc support.

Brake pad holder according to claim 1, characterized in that the spring element (3) is positively or non-positively on the inlet side carrier horn (12) can be fixed.

Brake lining holder according to claim 2, characterized in that on the spring element (3) two the inlet side carrier horn (12) embracing first tabs (35) are integrally formed.

Brake lining holder according to one of the preceding claims, characterized in that the first end (31) of the spring element (3) in the installed state on one of the axis of rotation of the brake disc facing functional surface (26, 27) of the lining carrier plate (21) is supported. Brake pad holder according to one of the preceding claims, characterized in that the second end (32) of the spring element (3) to the head portion (16) of the inlet side carrier horn (12) is formed bent out, the second end (32) in the unloaded state at the head area (16) of the inlet-side carrier horn (12) rests and in the loaded state against the spring force just bent between the head portion (16) of the inlet side carrier horn (12) and the edge of the lining carrier plate (21) is pressed.

6. Brake pad holder according to one of the preceding claims, characterized in that the spring element (3) is designed as a leaf spring or wire spring.

7. Brake pad holder according to one of the preceding claims, characterized in that the surface of the spring element (3) is hardened.

Brake lining holder according to one of the preceding claims, characterized in that the first end (31) of the spring element (3) is arcuate, in particular S-shaped.

9. Brake pad holder according to one of the preceding claims, characterized in that the head region (16) of the inlet side Bremsträgerhorn (12) near edge of the lining carrier plate (21) with a Bremsträgerhorn (12) radially from the rotational axis of the brake disc increasingly removing contour (29) is formed.

10. Brake pad holder according to one of the preceding claims, characterized in that the spring element (3) in the application direction (z) of the brake lining (2) is displaceable on the lining carrier plate (21) can be fixed.

1 1. Brake lining holder according to claim 10, characterized in that on the spring element (3) at least one of the lining carrier plate (21) of at least one side embracing second tab (37) are integrally formed.

12. Brake pad holder according to claim 1 1, characterized in that the second tab (37) has a bore (38) for receiving a on the lining carrier plate (21) fixed connecting element (5).

Brake lining holder according to claim 10, characterized in that the spring element (3) in the application direction (z) of the brake pad (2) slit-shaped recess (39) for receiving a on the lining carrier plate (21) fixed connecting element (5).

Brake pad holder according to one of the preceding claims, characterized in that on one of the axis of rotation of the brake disc remote from the edge (28) of the lining carrier plate (21) a pad retaining spring (4) is secured against loss and held radially deflectable.

Disc brake of a motor vehicle, in particular a commercial vehicle, on at least one side of a brake disc a brake pad (2) in a lining shaft of a stationary brake carrier (1) with the brake pad (2) laterally enclosing brake carrier horns (12, 13) are spring-loaded, wherein the brake pad ( 2) at least one friction lining and a friction lining bearing lining carrier plate (21), wherein the lining carrier plate (21) of the brake pad (2) is positively held in the installed state on an inlet side Bremsträgerhorn (12), characterized in that the brake pad holder according to one of preceding claims is formed.

Brake lining (2) of a disc brake of a motor vehicle, in particular of a commercial vehicle, comprising a friction lining (22) and a lining carrier plate (21) carrying the friction lining (22), wherein a projection (23) extends from an inlet-side edge of the lining carrier plate (21), in the assembled state of the brake pad (2) projects into a lateral recess (14) of an inlet-side carrier horn (12) of a brake carrier (3) of the disc brake, characterized in that a spring element (3) with two elastic ends (31, 32), wherein a first end (31) of the spring element (3) is designed to support the brake pad (2) radially relative to a rotational axis of the brake disc relative to a foot region of the inlet-side carrier horn (12) which is close to an axis of rotation of the brake disc; 31) of the spring element (3) is designed to radially support the brake pad (2) against a rotation axis of the brake disc remote head portion (16) of the inlet side carrier horn (12) to the axis of rotation of the brake disc.