Disc brake for a commercial vehicle

Abstract

Disc brake for a commercial vehicle, with a brake calliper (1) which spans a brake disc (3) and in which two brake pads (4) which can be pressed onto the brake disc (3) on both sides are positioned, which are each held in a pad shaft of a stationary brake carrier or the brake calliper (1) by means of a pad retaining spring (5) which extends transversely to the axial direction of the brake disc (3) and can be radially deflected on the respective brake pad (4), and on which a pad retaining bracket (6) is supported which extends in the application direction of the brake pads (4), is fastened to the brake calliper (1) and spans a mounting opening (2) of the brake calliper (1), and which is held at least on one side by means of a securing element (7) guided through a fastening eye (10) of the brake calliper (1), characterized in thatthat on the side of the fastening eye (10) facing away from the mounting opening (2), an abutment (12) in the form of a recess forming an insertion slot for a tool is formed on the fastening eye, wherein the abutment (12) serves to press down the pad retaining bracket by means of the tool in order to release the spring-force-induced frictional engagement of the pad retaining bracket (6) on the securing element (7) and to be able to pull the latter out of the fastening eye (10).

Description

[0001] The invention relates to a disc brake according to the preamble of claim 1.

[0002] Such a disc brake is disclosed in DE 10 2013 100 162 A1, DE 10 2016 101 394 A1, DE 10 2007 049 979 A1, DE 10 2006 002 306 A1 and DE 10 2017 113 384 A1.

[0003] To secure the position of the two brake pads, they are each provided with a pad retaining spring, which is attached to the upper edge area of ​​the respective brake pad facing an assembly opening in the brake calliper.

[0004] The brake pads are pressed under preload into the pad recess of a stationary brake anchor plate or the brake caliper by a pad retaining bracket extending transversely to the brake disc, i.e., in the axial direction of the brake disc, which is supported by the pad retaining springs. The pad retaining bracket is secured in two opposing areas of the brake caliper that define the mounting opening.

[0005] The spring-loaded mounting of the brake pads serves both to compensate for tolerances and to reduce or prevent the occurrence of rattling noises that would otherwise occur when the vehicle is in operation.

[0006] In order to assemble and disassemble the pad retaining bracket using simple means, it is inserted into a pocket-shaped receptacle in the brake calliper on the one hand and is attached to the brake calliper by means of a securing element, in particular a securing bolt, whereby this securing bolt, which is supported on the pad retaining bracket, is guided through a fastening eye formed on the brake calliper and passes through a window opening in the pad retaining bracket.

[0007] To release the pad retaining bracket, for example to change the brake pads, the pad retaining bracket's lock must be released, i.e. the locking element, i.e. the locking bolt, which, as mentioned, is inserted through a molded fastening eye of the brake calliper, must be moved from its locking position.

[0008] Since the pad retaining bracket rests against the locking bolt with spring tension from the pad retaining springs, the pad retaining bracket must be pressed down so that the then exposed locking bolt can be pulled out of the fastening eye.

[0009] This pressing down, which incidentally can only be done with one hand since the locking bolt is pulled out with the other hand, is only possible with a correspondingly high expenditure of force, whereby this expenditure of force is even higher when the disc brake is installed in a 3 o'clock position than when the pad retaining bracket is positioned at 12 o'clock.

[0010] In addition, the disc brake as a whole is dirty and / or corroded due to driving, which also makes it difficult to remove the pad retaining bracket.

[0011] The invention is based on the object of further developing a disc brake of the generic type in such a way that disassembly of the pad retaining bracket is easier.

[0012] This object is achieved by a disc brake having the features of claim 1 or 2.

[0013] The design according to the invention now makes it possible to use a tool, preferably a screwdriver, to remove the securing element or the pad retaining bracket when changing the brake pad, with which the pad retaining bracket can be pressed down in order to release the spring-force-induced frictional engagement of the pad retaining bracket on the securing element and to be able to pull the latter out of the fastening eyelet.

[0014] The tool is supported on the one hand on the abutment and on the other hand on the pad retaining bracket, whereby the abutment is stationary, while the pad retaining bracket to be pressed down is moved relative to it by the tool.

[0015] The abutment can be designed as a projection or recess, preferably in the area of ​​the mounting eyelet. However, it is also conceivable to provide the abutment in the area of ​​the opposite end, either on the brake caliper or on the pad retaining bracket, in this case as a recess or hook-shaped projection. In this case, the appropriate tool, such as a screwdriver, rests against the pad retaining bracket over its entire length, allowing it to be pressed down.

[0016] This not only makes it easier to disassemble the pad retaining bracket or the securing element, but also to assemble it, as the pad retaining bracket is then also pressed down in order to be able to insert the securing element into the fastening eye without any hindrance.

[0017] Since the locking bolt is free after the pad retaining bracket is pressed down and can be pulled out of its position in the fastening eye, this leads to a significantly easier assembly and disassembly of the pad retaining bracket, with little manual effort, whereby this represents a significant simplification, especially in the 3 o'clock position of the pad retaining bracket described in the state of the art.

[0018] While the pad retaining bracket is pressed down with the tool with one hand, usually the left hand, the other, the right hand, can be used to loosen a displacement lock, such as a split pin or similar, from the locking bolt and pull the bolt out. During assembly, after inserting the pad retaining bracket, it is pressed down so that the locking bolt can be freely pushed into the mounting eyelet and then secured against axial displacement.

[0019] Furthermore, the design according to the invention and the resulting use of a tool for releasing the pad retaining bracket significantly reduces the impairment of the person carrying out the assembly due to contact with dirt, in particular brake abrasion of the disc brake, which is to be emphasized as a particular advantage from a health perspective.

[0020] The realization of the invention is cost-neutral, since the abutments can be integrated into the manufacturing process without additional effort, either by molding them during the casting of the brake calliper or by inserting them during the punching of the pad retaining bracket made of sheet metal.

[0021] Further advantageous developments of the invention are characterized in the subclaims. An embodiment of the invention is described below with reference to the accompanying drawings.

[0022] They show: Fig. 1 a partial section of a disc brake according to the prior art in a perspective top view Fig. 2 a partial section of the disc brake according to the invention in a schematic plan view.

[0023] In the Fig. 1 shows a disc brake for a commercial vehicle according to the prior art, with a brake calliper 1 which overlaps a brake disc 3 and which is fastened to a vehicle-side brake carrier (not shown) so as to be axially displaceable with respect to an axis of rotation of the brake disc 3.

[0024] Brake pads 4 are arranged in the brake calliper 1 on both sides of the brake disc 3 and can be pressed against the brake disc 3 by means of an application device in the event of braking.

[0025] The brake pads 4, which can be inserted via a mounting opening 2 of the brake calliper 1, each have a pad retaining spring 5 on their side facing the mounting opening 2, on which a pad retaining bracket 6 is supported in such a way that the brake pads 4 lie under pretension in pad shafts of the brake calliper 1 or the brake carrier.

[0026] The pad retaining bracket 6 spans the mounting opening 2 and is held on the one hand in a pocket 11 of the brake calliper 1 and on the other hand by means of a securing element 7 on the brake calliper 1, wherein this securing element 7 is guided through a fastening eye 10 which, like the pocket 11, is formed on the brake calliper 1.

[0027] For axial securing of the securing element 7, it has a head at one end and a split pin 8 at the other end.

[0028] The pad retaining bracket 6 is provided at its end associated with the securing element 7 with a window part 9 through which the fastening eye 10 passes, wherein the securing element 7 rests on the upper side, i.e. on the side facing away from the brake pads 4, on the cranked end of the pad retaining bracket 6.

[0029] By eliminating the brake disc 3 and the brake pads 4, Fig. 2 shows the design of the disc brake according to the invention.

[0030] In this embodiment, the fastening eye 10 has, on its side facing away from the mounting opening 2, an abutment 12 in the form of a recess, in the example formed as an elongated hole, wherein this recess forms an insertion slot for a tool, in particular a screwdriver. By pressing down the screwdriver, which rests against the cranked window part 9, and further pressing down, the pad retaining bracket 6 is pushed out of its position so far that the securing element 7 is exposed and can be pulled out of the fastening eye 10 after releasing an axial lock.

[0031] The pad retaining bracket 6 can also be installed in the reverse order, whereby the pad retaining bracket 6 is first inserted with one end into the pocket 11 and then the cranked window part 9 with its window cutout is passed through by the fastening eye 10. Next, the cranked window part 9 is pressed down using the tool inserted into the abutment 12 until the securing element 7 can be easily pushed into the hole of the fastening eye 10.

[0032] Instead of a recess, it is of course also possible to provide a projection, which, however, is dimensioned in correspondence with the window opening of the pad retaining bracket 6 so that the pad retaining bracket 6 can be easily attached or removed after releasing the securing element 7. For example, a notch in the corresponding wall of the window opening may be useful for this purpose. List of reference symbols 1 brake caliper 2 mounting opening 3 brake disc 4 brake pad 5 Pad retaining spring 6 pad retaining brackets 7 Securing element 8 split pin 9 Window part 10 mounting eye 11 bag 12 abutments

Claims

[1] Disc brake for a commercial vehicle, with a brake calliper (1) which spans a brake disc (3) and in which two brake pads (4) which can be pressed onto the brake disc (3) on both sides are positioned, each of which is held in a pad shaft of a stationary brake carrier or of the brake calliper (1) by means of a pad retaining spring (5) which extends transversely to the axial direction of the brake disc (3) and can be deflected radially on the respective brake pad (4), and on which a pad retaining bracket (6) is supported which extends in the application direction of the brake pads (4), is fastened to the brake calliper (1) and spans a mounting opening (2) of the brake calliper (1), and which is held at least on one side by means of a securing element (7) guided through a fastening eye (10) of the brake calliper (1), characterized bythat on the side of the fastening eye (10) facing away from the mounting opening (2), an abutment (12) in the form of a recess forming an insertion slot for a tool is formed on the fastening eye, wherein the abutment (12) serves to press down the pad retaining bracket by means of the tool in order to release the spring-force-induced frictional engagement of the pad retaining bracket (6) on the securing element (7) and to be able to pull the latter out of the fastening eye (10). [2] Disc brake for a commercial vehicle, with a brake calliper (1) which spans a brake disc (3) and in which two brake pads (4) which can be pressed onto the brake disc (3) on both sides are positioned, which are each held in a pad shaft of a stationary brake carrier or the brake calliper (1) by means of a pad retaining spring (5) which extends transversely to the axial direction of the brake disc (3) and can be deflected radially on the respective brake pad (4), and on which a pad retaining bracket (6) is supported which extends in the application direction of the brake pads (4), is fastened to the brake calliper (1) and spans a mounting opening (2) of the brake calliper (1), which is held at least on one side by means of a securing element (7) guided through a fastening eye (10) of the brake calliper (1), characterized bythat in the end region opposite the fastening eyelet (10) and assigned to the pad retaining bracket (6), there is arranged an abutment (12) designed as a recess or as a hook-shaped projection on the brake calliper (1) or an abutment designed as a recess on the pad retaining bracket (6), wherein the abutment (12) serves to press down the pad retaining bracket by means of the tool in order to release the spring-force-induced frictional engagement of the pad retaining bracket (6) on the securing element (7) and to be able to pull the latter out of the fastening eyelet (10). [3] Disc brake according to claim 1, characterized by that the abutment (12) designed as a recess is designed as an elongated hole.

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