Disc brake with a pad retention system, and brake pad set

Abstract

Disc brake (1) for a vehicle, comprising a brake disc (2) with a brake disc pivot axis (2a), a brake caliper (3) which is a sliding caliper, with a clamping section (3a) and a back section (3b), at least two brake pads (4, 4') each with a pad backing plate (4a, 4'a) provided with a pad retaining spring (5, 5'), each of which is supported under preload by a pad retaining bracket (7) detachably attached to the brake caliper (3) and of which a clamping-side brake pad (4) is assigned to the clamping section (3a), and a backing-side brake pad (4') is assigned to the back section (3b), and a locking device (10) for securing the position of the pad retaining bracket (7) in relation to the brake caliper (3), wherein the locking device (10) has a locking element (11, 16) which is rotatable from an unlocked position to a locked position, in which the position of the pad retaining bracket (7) with respect to the brake caliper (3) is secured by the locking device (10), and back again, wherein the locking element (11) is rotatably arranged on or in the rear section (3b) of the brake caliper (3) about an axis of rotation (11a) which is perpendicular to the brake disc axis of rotation (2a) and in the locked position engages with a rear end section (7b) of the pad retaining bracket (7), wherein the rear end section (7b) of the pad retaining bracket (7) has a receiving section (7g) which engages with the locking element (11) in the locked position, characterized by the fact that the locking element (11) has an arm (12) which is connected to a bearing section (12d) which is rotatably inserted in a receptacle (13a) in the back section (3b) of the brake caliper (3) about the axis of rotation (11a).

Description

[0001] The present invention relates to a disc brake with a pad retention system according to the preamble of claim 1. The invention also relates to a brake pad set for a disc brake.

[0002] Brake pads for disc brakes, especially pneumatic disc brakes, in vehicles, e.g., commercial vehicles, are held in place by a pad retaining bracket in so-called pad wells. To prevent the pad retaining bracket from being displaced by transverse forces within the vehicle, additional components are required that not only prevent the retaining bracket from shifting, especially during operation, but also facilitate installation and removal.

[0003] These additional components include, for example, combinations of bolts and cotter pins, spring elements, and screws. After inserting the brake pads and mounting the pad retaining clip, the mechanic may forget to attach the securing components. This ensures that the pads are secured only for an indefinite period of time, and the defect is inevitably not noticeable. In the worst case, the pad retaining clip can slip during operation and compromise the brake pad's ability to secure it.

[0004] Numerous proposals for such safety components and devices have been made. An illustrative example is shown in document DE 102005045877 B3, and another is described in document DE 202008013446 U1.

[0005] DE 10 2005 045 877 B3 describes a disc brake, in particular for a commercial vehicle, with a brake calliper having a receiving space for an application device, which has a brake disc which can be brought into operative connection with brake shoes and is fastened to a brake carrier, and a retaining bracket which is detachably fastened to the brake calliper and on which springs acting on the outer edges of the brake shoes are supported, is designed in such a way that the retaining bracket lies in a form-fitting holder in a spring-loaded manner.

[0006] DE 10 2014 107 227 A1 relates to a disc brake for a vehicle, in particular for a commercial vehicle, comprising a brake disc with a brake disc rotation axis, a brake caliper, in particular a sliding caliper, with an application section and a back section, at least two brake pads, each with a pad back plate provided with a pad retaining spring, which are each supported under pretension by a pad retaining bracket detachably fastened to the brake caliper and of which a brake pad on the application side is assigned to the application section, and a back-side brake pad is assigned to the back section, as well as a safety device for securing the position of the pad retaining bracket.The safety device comprises at least one displaceably guided pin element, which can be moved from a rest position to an engaged position and back. In the engaged position, the at least one pin element forms a releasable connection between the pad retaining bracket and the pad backing plate of the back-side brake pad. A brake pad set comprises the two brake pads on the respective pad backing plate, the associated pad retaining springs, the pad retaining bracket, and the safety device.

[0007] DE 10 2014 019 619 A1 specifies a disc brake, in particular for commercial vehicles, comprising a brake caliper, at least one brake pad, a hold-down spring that holds the brake pad radially relative to a brake axis, a hold-down bracket that pretensions the hold-down spring in the radial direction, a first holder on the brake caliper that supports the hold-down bracket radially outward, and a second holder with a stop on the brake caliper that supports the hold-down bracket radially outward but not in the axial direction, wherein the first or the second holder has a stop acting in a first axial direction. The hold-down bracket has a first projection that is axially supported on the hold-down spring in a second axial direction opposite the first axial direction, and / or a second projection that is supported on the brake caliper in the second axial direction but not radially outward.

[0008] DE 10 2013 011 673 A1 describes a brake pad holder for a disc brake for a commercial vehicle, comprising a pad retaining bracket supported by pad retaining springs of brake pads arranged on both sides of a brake disc in a brake caliper. The pad retaining bracket spans a mounting opening of the brake caliper in the axial direction of the brake disc and is held at least on one side in a mounting eye of the brake caliper by means of a bolt-shaped securing element. The securing element is formed from an eccentric bolt with a shaft and at least one eccentric section positioned axially offset from the shaft.

[0009] DE 20 2010 007 332 U1 relates to a brake pad holder, in particular for braking systems for rail vehicles, with a pad carrier which is guided on a sole of a pad holder and carries at least one friction pad, which can be clamped relative to the pad holder by means of a spring arrangement which is guided on a back of the pad holder and engages under at least one side region of the pad carrier.a) The spring arrangement consists of leaf or bow springs, each of which extends on the back of the pad holder on both sides of the longitudinal center line of the same; b) the ends of the leaf or bow springs engage under tabs which extend from the pad carrier and engage around the pad holder on both sides; and c) the leaf or bow springs are curved in the middle section between the ends and can be braced by mechanical action in their middle section in such a way that the ends of the leaf or bow springs, as a result of their engagement under the tabs, brace the pad carrier against the pad holder.

[0010] DE 20 2008 013 446 U1 describes a disc brake, in particular for a commercial vehicle, with a brake caliper that spans at least one brake disc and has a mounting opening for brake pads that interact with pad retaining springs that are supported on a retaining bracket that spans the mounting opening parallel to the axial direction of the brake disc. The retaining bracket is captively fastened to the brake caliper in a locking position by one end of the retaining bracket being positively connected to the brake caliper and the other end of the retaining bracket being held to the brake caliper by means of a locking device that is formed separately from the retaining bracket. The locking device is designed as a spring element whose spring action acts substantially transversely to the axial direction of the brake disc in order to hold the retaining bracket in the locking position.

[0011] DE 10 2015 122 558 A1 describes a disc brake with a brake caliper that engages a brake disc and brake pads arranged on both sides in a pad shaft, and with a retainer extending transversely across the brake pads and supported against the brake pads toward the disc brake axis. To simplify the manufacturing process of securing the retainer on the brake caliper side, one end of the retainer is seated in a slot in the brake caliper, with the front end of the retainer facing a rear wall, and an upper and lower side of the retainer facing an upper and lower surface of the slot, respectively.

[0012] There is a constant need for designs with reduced installation and maintenance costs as well as reduced downtime.

[0013] The invention is based on the object of creating an improved disc brake.

[0014] Another task is to provide an improved brake pad set.

[0015] The invention solves this problem by the subject matter of claim 1. The problem is also solved by the subject matter of claim 5 and the subject matter of claim 12.

[0016] The further problem is solved by the subject matter of claim 13.

[0017] Accordingly, a disc brake according to the invention for a vehicle, in particular for a commercial vehicle, comprises a brake disc with a brake disc rotation axis, a brake caliper, in particular a sliding caliper, with an application section and a back section, at least two brake pads, each with a pad back plate provided with a pad retaining spring, which are each supported under pretension by a pad retaining bracket detachably fastened to the brake caliper and of which a brake pad on the application side is assigned to the application section, and a back-side brake pad is assigned to the back section, as well as a securing device for securing the position of the pad retaining bracket in relation to the brake caliper.The locking device has a locking element which can be rotated from an unlocked position into a locked position, in which the position of the pad retaining bracket in relation to the brake calliper is secured by the locking device, and back again.

[0018] This enables quick and easy installation when changing brake pads and during maintenance, as the locking device can be easily locked and unlocked by turning the locking element.

[0019] A first alternative disc brake according to the invention for a vehicle comprises a brake disc with a brake disc rotation axis, a brake caliper, which is a sliding caliper, with an application section and a back section, at least two brake pads, each with a pad back plate provided with a pad retaining spring, which are each supported under pretension by a pad retaining bracket detachably attached to the brake caliper and of which a brake pad on the application side is assigned to the application section, and a back-side brake pad is assigned to the back section, as well as a securing device for securing the position of the pad retaining bracket with respect to the brake caliper, wherein the securing device has a securing element which can be moved from an unlocked position into a locked position in which the position of the pad retaining bracket with respect to the brake caliper (3) is secured by the securing device,and is rotatable back again, wherein the securing element is arranged on or in the back portion of the brake caliper so as to be rotatable about an axis of rotation which runs perpendicular to the brake disc axis of rotation and, in the locked position, is in engagement with a back-side end portion of the pad retaining bracket, wherein the back-side end portion of the pad retaining bracket has a receiving portion which is in engagement with the securing element in the locked position.

[0020] A second alternative disc brake according to the invention for a vehicle, in particular for a commercial vehicle, comprises a brake disc with a brake disc rotation axis, a brake caliper, in particular a sliding caliper, with an application section and a back section, at least two brake pads, each with a pad back plate provided with a pad retaining spring, which are each supported under preload by a pad retaining bracket releasably attached to the brake caliper, of which a brake pad on the application side is assigned to the application section, and a back-side brake pad is assigned to the back section, as well as a securing device for securing the position of the pad retaining bracket with respect to the brake caliper. The securing device comprises a securing element and a cover element, wherein the securing element is connected to the pad retaining bracket and engages with the cover element, which is attached to the back-side brake pad.

[0021] This results in a simple design and easy assembly, with the number of components being advantageously low.

[0022] In a preferred embodiment of the disc brake, the locking element is arranged on or in the back portion of the brake caliper, rotatable about a rotation axis that runs perpendicular to the brake disc's rotation axis, and, in the locked position, engages a back end portion of the pad retaining bracket. This advantageously allows the locking device to be easily and quickly accessed.

[0023] In a preferred embodiment of the disc brake, it is also advantageous if the rear end section of the pad retaining bracket has a receiving section which engages with the securing element in the locked position, since this allows easy access.

[0024] In a preferred embodiment of the disc brake, the locking element has an arm connected to a bearing section which is inserted in a receptacle in the back section of the brake caliper so as to be rotatable about the rotation axis. It is advantageous that the locking element can be actuated by hand and can be easily inserted into a receptacle, e.g., a bore. The locking element can of course also be rotated using a tool, for which purpose the arm can be provided, for example, with a corresponding tool holder or an attachment for a tool. Such a tool can be, for example, an Allen key, whereby the tool holder in this case is provided with a hexagon socket profile.

[0025] In one embodiment, the arm of the securing element, in the locked position, is in positive engagement with the receiving portion of the rear end portion of the pad retaining bracket, wherein the rear end portion of the pad retaining bracket is arranged in a recess of a holding portion of the rear portion of the brake caliper. This positive engagement enables a secure position of the securing element.

[0026] This secure position is advantageously increased when the arm, in the locked position, is in positive engagement with the receiving portion of the back-side end portion of the pad retaining bracket, wherein at the same time an upper side of the arm is in contact with a cover surface of the recess of the retaining portion of the back portion of the brake caliper.

[0027] A further embodiment provides that the arm is provided with at least one inclined surface designed to interact with at least one slope of a step on the rear end portion of the pad retaining bracket when the locking element assumes the locked position. This is advantageous because it simplifies locking by allowing the locking element to be easily threaded between the brake caliper and the retaining bracket.

[0028] In a preferred embodiment of the first alternative embodiment of the disc brake, the securing device comprises the securing element and a bracket, wherein the bracket is arranged in or on the back portion of the brake caliper. This advantageously achieves simple assembly and operation of the securing device.

[0029] In the first alternative embodiment of the disc brake, it is preferred that the receiving portion of the rear end portion of the pad retaining bracket be formed in the form of an elongated hole extending in the longitudinal direction of the pad retaining bracket and divided into two recesses by a through hole in the form of an elongated hole arranged transversely to the through hole. On each side of the through hole in the form of an elongated hole, one of the recesses is formed or countersunk into the end portion. This embodiment has the advantage of enabling simple assembly without a retaining portion on the rear portion of the brake caliper. Mounting the pad retaining bracket is facilitated.

[0030] In the first alternative embodiment of the disc brake, the locking element comprises an upper body and a lower body arranged in a mirror image thereto, as well as a connecting section connecting the bodies. The bodies are toggle-shaped and arranged with their longitudinal axes parallel to each other, each forming a type of sliding block, with the axis of rotation running through a longitudinal axis of the connecting section and the bodies. The shape of the upper body enables easy operation, while the identical shapes of the bodies prevent confusion during assembly.

[0031] Thus, in the first alternative embodiment of the disc brake, the upper body can be designed to interact with the elongated hole and the receiving portion of the rear end section of the pad retaining bracket, while the lower body is designed to interact with the bracket. The same shape (elongated hole) and dimensions can be used for both interactions.

[0032] Furthermore, in the first alternative embodiment of the disc brake, it is provided that the holder has a circular-cylindrical body, one end of which has a support surface and the other end of which has an upper side. The body has the axis of rotation in its longitudinal axis and is provided with a continuous elongated hole and two molded-in recesses. The recesses are offset by 90° to the elongated hole and lie in a plane parallel to the upper side, the plane being arranged centrally between the upper side and the support surface. This results in simple assembly when inserting the locking element in the unlocked position and simple assumption of the locked position in the holder by rotating it by 90°.

[0033] For this purpose, in the first alternative embodiment of the disc brake, the recesses each have a curved wall and, in their plane, form a cross-section composed of two intersecting ellipses. The recesses are separated from each other by the continuous elongated hole and are arranged at a 90° angle to the elongated hole (22). This results in a compact design.

[0034] In the first alternative embodiment of the disc brake, the bracket is arranged and fastened in a receptacle in the back section of the brake caliper, wherein the upper side protrudes from the receptacle and the elongated hole is arranged with its longitudinal axis parallel to the brake disc, wherein the bracket and the receptacle are arranged coaxially to the axis of rotation. This is advantageous for simple and quick assembly. The bracket can be fastened in the back section of the brake caliper by pressing and / or welding. Furthermore, an advantageously simple insertion of the securing element into the bracket through the through-hole in the back-side end section of the pad retaining bracket is possible, since both elongated holes are arranged congruently one above the other. This facilitates the assembly of the securing element.

[0035] In the first alternative embodiment of the disc brake, the securing element is arranged in the unlocked position such that the upper body is located with its underside parallel to the brake disc at the level of an upper edge of the elongated hole of the back-side end section of the pad retaining bracket, and that the lower body in the holder is located next to the recesses, also parallel to the brake disc, wherein the securing element is rotated by 90° in the locked position and is arranged such that the upper body is in positive engagement with its underside with the receiving section of the back-side end section of the pad retaining bracket, parallel to the brake disc axis, and that the lower body in the holder is in positive engagement with the recesses and is also arranged parallel to the brake disc axis of rotation.In the locked position, which can advantageously be achieved simply by rotating the locking element by 90°, the position of the pad retaining bracket is advantageously secured axially, radially and tangentially simultaneously by the locking device.

[0036] A preferred embodiment of the second alternative disc brake provides that the securing element is designed as a screw or bolt with a head, a body, and an end portion, wherein the head is fastened to the body at a central holding portion of the pad retaining bracket, and the end portion engages with the cover element. It is advantageous that the components are simple to manufacture and easy to assemble. The cover element can, for example, be a stamped and bent part and does not require any additional installation space, particularly since the holding portion is located centrally on the pad retaining bracket along its longitudinal axis.

[0037] In this embodiment, the second alternative disc brake is further preferably provided with the end section of the securing element extending through a through-opening in the cover element perpendicular to the brake disc's rotation axis. Advantageously, no tools are required for this simple assembly.

[0038] In the embodiment of the second alternative disc brake, it is preferred that the cover element is mounted on the upper side of a pad backing plate of the back-side brake pad. The cover element can thus also serve the function of a conventional cover element for securing the pad retaining spring.

[0039] A brake pad set for a disc brake for a vehicle, in particular for a commercial vehicle, wherein the disc brake comprises a brake disc with a brake disc rotation axis, a brake caliper, in particular a sliding caliper, with an application section and a back section, at least two brake pads, each with a pad back plate provided with a pad retaining spring, which are each supported under pretension by a pad retaining bracket detachably fastened to the brake caliper and of which a brake pad on the application side is assigned to the application section, and a back-side brake pad is assigned to the back section, as well as a securing device for securing the position of the pad retaining bracket in relation to the brake caliper is provided.The brake pad set comprises the two brake pads with the respective pad backing plate, the associated pad retaining springs, the pad retaining bracket, and the securing device, which is designed as described above and comprises a securing element and a hood element, wherein the securing element is connected to the pad retaining bracket, and wherein the hood element is attached to a back-side brake pad of the at least two brake pads and has a through opening as an elongated hole formed in a holding section of the hood element, wherein a longitudinal axis of this elongated hole runs parallel to the pad backing plate of the back-side brake pad.

[0040] The drawings illustrate exemplary embodiments of a disc brake according to the invention and are described in more detail below, with further advantages of the invention also being explained. They show: Fig. 1 is a schematic perspective view of a first embodiment of a disc brake with a safety device; Fig. 2 a schematic perspective view of a pad retaining bracket of the first embodiment according to Fig. 1; Fig. 3 an enlarged schematic perspective view of the securing device of the first embodiment according to Fig. 1; Fig. 4 a schematic sectional view of the securing device of the first embodiment according to Fig. 3; Fig. 5 a schematic perspective view of a securing element of the securing device of the first embodiment according to Fig. 1; Fig. 6 a schematic perspective view of a brake caliper of the first embodiment according to Fig. 1; Fig. 7 is a schematic perspective view of a second embodiment of a disc brake with a safety device; Fig. 8 a schematic perspective view of a pad retaining bracket of the second embodiment according to Fig. 7; Fig. 9 a schematic sectional view of the securing device of the second embodiment according to Fig. 7; Fig. 10 a schematic perspective view of a securing element of the securing device of the second embodiment according to Fig. 7; Fig. 11 a schematic perspective view of a holder of the securing device of the second embodiment according to Fig. 7; Fig. 12 a schematic perspective view of a brake caliper of the second embodiment according to Fig. 7; Fig. 13 is a schematic perspective view of a third embodiment of a disc brake with a safety device; Fig. 14 is an enlarged schematic perspective view of the securing device of the third embodiment according to Fig. 13; Fig. 15 a schematic sectional view of the securing device of the third embodiment according to Fig. 13; and Fig. 16 a schematic perspective view of a hood element of the securing device of the third embodiment according to Fig. 13.

[0041] Terms like "top," "bottom," "right," "left," etc., refer to orientations within the respective figures. Coordinates x, y, and z are used for further orientation.

[0042] Fig. 1 shows a schematic perspective view of a first embodiment of a disc brake 1 with a securing device 10.

[0043] The disc brake 1 is pneumatically actuated, for example, and assigned to a vehicle, in particular a commercial vehicle. The disc brake 1 comprises a brake disc 2 with a brake disc rotation axis 2a extending in the y-direction, a brake caliper 3, a brake carrier BT, and at least two brake pads 4 and 4', each with a pad backing plate 4a, 4'a, to which a friction pad 4b, 4'b is applied. The brake pads 4 and 4' are accommodated in the brake carrier BT in so-called pad shafts and held by the pad retaining bracket 7, which will be described in more detail below.

[0044] The brake caliper 3 is designed here as a sliding caliper, held on the stationary brake carrier BT in a manner not described in more detail, and has an application section 3a and a back section 3b, which are connected to one another at both ends in the y-direction via connecting sections 3c in the y-direction. The application section 3a and the back section 3b are each arranged on one side of the brake disc 2 parallel to the latter, with the connecting sections 3c extending in the y-direction parallel to the brake disc rotation axis 2a. The application section 3a and the back section 3b, together with the connecting sections 3c, form an opening 6 above the brake disc 2 with the brake pads 4 and 4' for access to the brake pads 4 and 4' during assembly, replacement, and maintenance work.

[0045] The application section 3a of the brake caliper 3 accommodates an application mechanism for the disc brake 1. The application mechanism serves to actuate the disc brake 1 and can, for example, be a rotary brake lever with a pneumatic cylinder. This will not be described further here.

[0046] The side of the disc brake 1 on which the application section 3a of the brake caliper 3 with the application mechanism is located is also referred to as the application side. The other side of the disc brake 1, on which the back section 3b of the brake caliper 3 is located, is called the back side or reaction side. These terms "application side" and "back side" and other related designations are common and serve to provide better orientation.

[0047] Thus, the brake pad 4 with the pad back plate 4a, which is located on the application side, is called the application-side brake pad 4, and the one opposite it is called the back-side brake pad 4' with the pad back plate 4'a.

[0048] The brake pad 4 on the application side is subjected to an application force in the y-direction by the application mechanism during braking operations. The back-side brake pad 4' is accommodated in the back section 3b of the brake caliper 3 and, in this disc brake 1 with the sliding-caliper brake caliper 3, exhibits no relative movement to the back section 3b.

[0049] The brake pads 4, 4' are each provided with a pad retaining spring 5, 5' on the upper sides of their respective pad backing plates 4a, 4'a, which interact with the pad retaining bracket 7. The pad retaining bracket 7 extends in the y-direction above the opening 6 and is arranged above the installed brake pads 4, 4' such that it presses on the upper sides of the pad retaining springs 5, 5' and thus serves to secure the brake pads 4, 4' in the brake carrier BT. The pad retaining bracket 7 is received with an application-side end section 7a in a bearing section 8 of the application section 3a of the brake caliper 3, with an opposite end section 7b of the pad retaining bracket 7 being connected to a holding section 9 of the back section 3b of the brake caliper 3.

[0050] The pad retaining bracket 7 is connected to the bearing section 8 and the holding section 9 and is provided with the securing device 10 such that, on the one hand, it cannot be displaced in its installed position, e.g., due to transverse forces occurring, and on the other hand, it can be assembled and disassembled. The securing device 10 of this first exemplary embodiment enables the pad retaining bracket 7 to be secured with respect to the brake caliper 3 in the axial direction (y-direction), radial direction (z-direction), and tangential direction (x-direction). The securing device 10 is arranged here in the region of the rear-side brake pad 4' and has a securing element 11 with an axis of rotation 11a running in the z-direction perpendicular to the brake disc axis of rotation 2a. The securing element 11 will be explained in more detail below.

[0051] A brake pad set comprises the two brake pads 4, 4' on the respective pad backing plate 4a, 4'a with the friction pads 4b, 4'b, the associated pad retaining springs 5, 5', the pad retaining bracket 7 and the securing device 10.

[0052] Fig. Figure 2 shows a schematic perspective view of the pad retaining bracket 7 of the first embodiment Fig. 1.

[0053] In the first exemplary embodiment, the pad retaining bracket 7 is designed such that its rear end section 7b is bent downwards. The rear end section 7b is connected to the body of the pad retaining bracket 7 by two transition sections 7c, which, corresponding to the bend, have two curves such that a surface of the rear end section 7b runs essentially parallel to a top or bottom side 7k of the pad retaining bracket 7. The two transition sections 7c extend along the edges, with an opening 7d being formed between them, an edge of the body of the pad retaining bracket 7, and an edge of the end section 7b.

[0054] The back-side end section 7b of the pad retaining bracket 7 is designed in the form of a rectangular plate with two rounded outer corners on a back-side edge. The end section 7b has a plateau region 7e in the area to which the transition sections 7c are attached. The plateau region 7e extends over a width of the end section 7b. The width of the end section 7b here corresponds to the width of the pad retaining bracket 7 and runs at right angles to a length of the pad retaining bracket 7. In the longitudinal direction of the end section 7b, i.e. in the longitudinal direction of the pad retaining bracket 7, the plateau region 7e extends over approximately three-quarters of the length of the end section 7b towards its back-side edge and is stepped downwards to a base surface 7f.

[0055] In a central section symmetrical to an imaginary center line in the longitudinal direction of the end section 7b, a receiving section 7g is formed into the plateau region 7e. One end of the receiving section 7g in the plateau region 7e is rounded in a semicircular shape. The other end of the receiving section 7g points to a rear edge of the end section 7b and lies open within a step of the plateau region 7e. A bottom surface of the receiving section 7g lies in the same plane as the bottom surface 7f. The receiving section 7g has parallel side walls 7j within the plateau section 7e, which are connected at one end of the receiving section 7g by a semicircular wall.

[0056] The step between the plateau area 7e and the base surface 7f has two slopes 7h. The slope angle of the slopes 7h from the base surface 7f to the plateau area 7e ranges from approximately 15° to 30°.

[0057] The slopes 7h of the step each extend from the imaginary center line of the end section 7b to the sides of the end section 7b at an angle to the transition sections 7c. At their outer ends, a small boundary 7i is provided, each forming an edge and projecting from the slopes 7h to the back end of the end section 7b. A respective upper side of the boundaries 7i lies in the same plane as the upper side of the plateau region 7e.

[0058] The angle of the angled bevels 7h to the back edge of the end section 7b, which runs perpendicular to the imaginary center line of the end section 7b, i.e., the longitudinal direction of the pad retaining bracket 7, is in a range of approximately 10° to 20°, here approximately 15°. In other words, the intersection lines of the bevels 7h, angled in this way, with the plane of the step surface 7f, in turn have an intersection point that lies on the imaginary center line of the end section 7b at its back edge.

[0059] The function of the floor surface 7f which is stepped to the plateau area 7e, the slopes 7h of the step between the plateau area 7e and the floor surface 7f as well as the receiving section 7g are described in connection with the Fig. 3, Fig. 4, Fig. 5 and Fig. 6 described.

[0060] In Fig. 3 is an enlarged schematic perspective view of the securing device 10 of the first embodiment according to Fig. 1 shown. Fig. 4 shows a schematic sectional view of the securing device 10 of the first embodiment according to Fig. 3. In Fig. 5 is a schematic perspective view of a securing element 11 of the securing device 10 of the first embodiment according to Fig. 1 shown. Fig. Figure 6 shows a schematic perspective view of the brake caliper 3 of the first embodiment according to Fig. 1.

[0061] Fig. 3 shows the securing device 10 in a transitional state when locking or unlocking the pad retaining bracket 7. The securing device 10 has the rotatable securing element 11. The securing element 11 as in Fig. 5 comprises an arm 12 with a first end portion 12a and a second end portion 12b opposite the first end portion. The first end portion 12a is connected to a cylindrical connecting portion 12c, which is arranged at right angles to the arm 12. The connecting portion 12c has on its underside a likewise cylindrical bearing portion 12d arranged coaxially with the first end portion 12a and the rotational axis 11a of the securing element 11. An outer diameter of the bearing portion 12d is smaller than an outer diameter of the connecting portion 12c.

[0062] The arm 12 has a flat upper side 12e and a lower side 12f. The other end section 12b of the arm 12 is provided on both sides with an inclined surface 12g, which merges into the lower side 12f. Furthermore, the arm 12 is provided with an inclined surface 12h on each of its long sides. In addition, a hexagonal recess 12i for receiving a tool for rotating the locking element 11 is formed into the first end section 12a of the arm 12, coaxial with the rotation axis 11a. The recess 12i can of course also be of different shapes, e.g., square, hexagonal, or Phillips, or the like.

[0063] Fig. Figure 4 shows the securing device 10 in a locked state. The securing element 11 is rotatably arranged in the back section 3b of the brake caliper 3 in a bore 13a of a projection 13. An edge region of the underside of the connecting section 12c rests on a surface of the projection 13 of the back section 3b. The bearing section 12d is received in a bore 13a of the back section 3b, with the bore 13a being formed by the projection 13 in the z-direction.

[0064] The surface of the projection 13 extends in an xy plane in the y direction as surface 13b further over the back portion 3b into a recess 9a below the holding portion 9 and forms the bottom of the recess 9a. The recess 9a also has a cover surface 9b, which is arranged parallel to the surface 13b.

[0065] The pad retaining bracket 7 is arranged above the opening 6 of the brake caliper 3 in the y-direction parallel to the brake disc rotation axis 2a such that the application-side end section 7a of the pad retaining bracket 7 is connected to the bearing section 8 of the application section 3a of the brake caliper 3. The back-side end section 7b of the pad retaining bracket 7 is previously connected to the projection-like holding section 9 of the back section 3b of the brake caliper 3 such that the projection-like holding section 9 extends through the opening 7d of the pad retaining bracket 7, wherein the end section 7b of the pad retaining bracket 7 is arranged in the recess 9a below the holding section 9.

[0066] In the Fig. In the installed position of the pad retaining bracket 7 shown in Figure 4, the pad retaining bracket presses with its underside 7k via a hood element 15 onto the pad retaining spring 5' of the back-side brake pad 4', thus holding it in the brake carrier BT. The hood element 15 is arranged on the upper side of the pad back plate 4'a of the back-side brake pad 4', with a portion of the hood element 15 extending through a through-opening 14 of the pad back plate 4'a.

[0067] To lock or arrest the pad retaining bracket 7 in this position, the securing element 11 with its bearing section 12d is now inserted into the bore 13a of the back section 3b of the brake calliper 3, wherein the arm 12 of the securing element 11 is aligned in the x-direction.

[0068] The securing element 11 is in this unlocked state of the securing device 10 (not shown, but easily recognizable by Fig. 3 and Fig. 4) in the position in which the arm 12 of the securing element points in the x-direction parallel to the back edge of the back end section 7b of the pad retaining bracket 7 and to the back section 3b of the brake caliper 3. The arm 12 can point in the positive or negative x-direction.

[0069] By turning the locking element 11 clockwise, as in the transition state in Fig. 3, or counterclockwise from the other unlocked position mentioned above, the respective inclined surface 12g of the second end section 12b of the arm 12 first comes into contact with the upper side of the step surface 7f of the end section 7b of the pad holding bracket 7, wherein the respective upper inclined surface 12h on the long side of the arm 12 then comes into contact with the upper edge of the recess 9a of the holding section 9. Then, as the locking element 11 is rotated further, the respective inclined surface 12g of the second end section 12b of the arm 12 contacts the respective inclination 7h of the step of the plateau area 7e. The gradation is necessary so that the securing element 11 can be threaded between the cover surface 9b of the recess 9a and the rear end section 7b of the retaining bracket 7 during locking, ie when twisting into the locked position.The upper side 12e of the arm 12 contacts the cover surface 9b of the recess 9a and the end section 7b of the retaining bracket 7 is pressed downwards towards the surface 13a of the recess 9a, whereby sufficient air remains between a lower side of the end section 7b and the surface 13a of the recess 9a.

[0070] Finally, upon further rotation of the securing element 11, the arm 12 engages the receiving section 7g of the end section 7b of the pad retaining bracket 7 and is prevented from rotating further by the side walls 7j of the receiving section 7g. In this locking position of the securing device 10, the arm 12 of the securing element 12 extends parallel to the brake disc rotation axis 2a in the y-direction. The upper side 12e of the arm 12 is in contact with the cover surface 9b of the recess 9a of the retaining section 9. The underside 12f of the arm 12 rests on the surface of the receiving section 7g.

[0071] To rotate the locking element 11 into the corresponding positions, an Allen key can be used, for example, which is inserted into the tool holder 12i of the locking element 11, which in this case is provided with a hexagon socket.

[0072] In this way, the pad retaining bracket 7 is locked radially by the retaining section 9, i.e., in the z-direction, directly relative to the brake caliper 3. Furthermore, the pad retaining bracket 7 is locked tangentially to the brake disc 2, i.e., in the x-direction, and axially, i.e., in the y-direction parallel to the brake disc rotation axis 2a, by the locking element 11. The tangential and axial locking is achieved by the positive connection of arm 12 and receiving section 7g, as well as the positive connection of bearing section 12d of the locking element 11 in the bore 13a of the back section 3b of the brake caliper 3.

[0073] Fig. 7 shows a schematic perspective view of a second embodiment of the disc brake 1 with a safety device 10. In Fig. 8 is a schematic perspective view of a pad retaining bracket 7 of the second embodiment according to Fig. 7 shown. Fig. 9 shows a schematic sectional view of the securing device 10 of the second embodiment according to Fig. 7. In Fig. 10 is a schematic perspective view of a securing element 16 of the securing device 10 of the second embodiment according to Fig. 7 shown. Fig. 11 shows a schematic perspective view of a holder 21 of the securing device 10 of the second embodiment according to Fig. 7. In Fig. 12 is a schematic perspective view of a brake caliper 3 of the second embodiment according to Fig. 7 shown.

[0074] In contrast to the first embodiment according to Fig. 1 shows the second embodiment Fig. 7 has a differently designed securing device 10. A retaining section 9 on the back section 3b of the brake caliper 3 is not present. The pad retaining bracket 7 is attached by its back end section 7b to the back section 3b of the brake caliper 3 by means of the securing device 10.

[0075] The securing device 10 of the second embodiment comprises a securing element 16, which is rotatable about a rotation axis 16a, and a holder 21, which is arranged in the back portion 3b of the brake caliper 3. The securing device 10 of this second embodiment enables the pad retaining bracket 7 to be secured relative to the brake caliper 3 in the axial direction (y-direction), the radial direction (z-direction), and the tangential direction (x-direction).

[0076] The securing element 16 is held rotatably in the holder 21 at one end, wherein the other end of the securing element 16 interacts with the rear end section 7b of the pad retaining bracket 7 and locks it.

[0077] The pad retaining bracket 7 of the second embodiment is in Fig. 8 and differs from the pad retaining bracket 7 of the first embodiment by its rear end section 7b. This end section 7b is attached to the body of the pad retaining bracket 7 via a bent transition section 7c, wherein the transition section 7c has no opening.

[0078] In this second embodiment, the receiving portion 7g is formed in the form of an elongated hole extending in the longitudinal direction of the pad retaining bracket 7. The receiving portion 7g is also divided into two recesses 18, 18a by a through hole in the form of an elongated hole 17 arranged transversely to it.

[0079] Thus, on each side of the elongated hole 17, one of the recesses 18, 18a is formed or countersunk into the end section 7b. Both recesses 18, 18a face each other and have the shape of the elongated hole 17 rotated by 90° in the same plane. An imaginary center line of the recesses 18, 18a runs along an imaginary center line of the pad retaining bracket 7 in its longitudinal direction. The function of the elongated hole 17 and the recesses 18, 18a is described in detail below.

[0080] The elongated hole 17 runs with its longitudinal axis transverse to a longitudinal axis of the pad retaining bracket 7. When the pad retaining bracket 7 is installed, the elongated hole 17 runs parallel to the brake disc 2.

[0081] The securing element 16 is in Fig. 10 and comprises an upper body 19 and a lower body 19' arranged in a mirror image thereto. The upper body 19 and the lower body 19' are connected to each other by a circular-cylindrical connecting section 20, through whose central axis the rotation axis 16a runs.

[0082] The upper body 19 and the lower body 19' are toggle-shaped and each also forms a type of sliding block. Both bodies 19 and 19' are arranged with their longitudinal axes parallel to each other. Each body 19, 19' has opposite end sections 19a, 19b; 19'a, 19'b, which are rounded. A cross-section of the bodies 19, 19' in a plane perpendicular to the rotation axis 16a in the region of their undersides is designed as an elongated hole and corresponds to the elongated hole 17 of the rear end section 7b of the pad retaining bracket 7.

[0083] The bodies 19, 19' are connected at their opposite undersides by the connecting section 20, whereby the respective underside is divided into two support surfaces 19c, 19d; 19'c, 19'd under a respective end section 19a, 19b; 19'a, 19'b. A connecting region between a respective end of the connecting section 20 and the corresponding underside of the respective body 19, 19' is designed as a type of circumferential shoulder or thickening, which is formed on the longitudinal sides of the undersides of the bodies 19, 19' into a projection 19g, 19'g protruding from the respective underside. These projections 19g, 19'g are opposite one another at a respective end of the connecting section 20.

[0084] The upper sides opposite the undersides of the bodies 19, 19' each have a flat surface 19h, 19'h, with the respective peripheral edge being rounded all the way around.

[0085] The upper body 19 of the securing element 16 is provided for cooperation with the back end portion 7b of the pad retaining bracket 7, wherein the lower body 19' is provided for cooperation with the holder 21.

[0086] The bracket 21 is in Fig. 11 and has a circular cylindrical body 21a with the rotation axis 16a. The body 21a is at one end, which is shown in plan view in the figure, and a lower end (see Fig. 9) is provided with a flat support surface 21b with a circumferential rounded edge 21c. The other end of the body 21a is provided with a flat surface as the upper side 21d (in Fig. 9 clearly visible).

[0087] The body 21a of the holder 21 is provided with a continuous elongated hole 22 in the direction of the rotation axis 16a, i.e., a longitudinal axis of the elongated hole 22 runs transversely to the rotation axis 16a. From the underside, two recesses 23, 24 are formed in the body 21a, which lie in a plane parallel to the upper side 21d and here centrally between the upper side 21d and the support surface 21b.

[0088] The recesses 23, 24 each have a curved wall 23a, 24a and form a cross-section in their plane perpendicular to the rotation axis 16a, which is composed of two intersecting ellipses. The recesses 23, 24 are separated from each other by the continuous slot 22 and, like the recesses 18, 18a, are arranged offset or rotated by 90° to the slot 22. The contour of the recesses 23, 24 with their walls is created, for example, by the slot 22 being arranged on the plane of the recesses 23, 24 in Fig. 11 is rotated counterclockwise by 90° around the rotation axis 16a from the position of the elongated hole 22.

[0089] When assembling and installing the safety device 10 and the pad retaining bracket 7, the bracket 21 is first inserted with its underside, with the circumferential rounded edge 21d first, into a receptacle 25 in the back section 3b of the brake calliper 3, which Fig. 12 is clearly shown. The upper side 21d of the holder 21 protrudes from the receptacle 25. The receptacle 25 is here a bore with a center line in which the rotation axis 16a lies. The support surface 21b of the holder 21 lies on a bottom 25a of the receptacle 25, which is Fig. 9. The contour of the receptacle 25 corresponds to the outer contour of the holder 21, wherein the outer side of the holder 21 is in positive contact with a wall 25b of the receptacle 21.

[0090] Then, the bracket 21 is rotated in the receptacle 25 so that the elongated hole 22 is positioned with its longitudinal axis parallel to the brake disc 2. In this position, the bracket 21 is then fixed in the receptacle 25, e.g., by pressing and / or welding.

[0091] Now the securing element 16 with the lower body 19' is inserted into the elongated hole 22 of the holder 21, wherein the bodies 19', 19 are initially arranged with their parallel longitudinal axes parallel to the brake disc 2.

[0092] The pad retaining bracket 7 is then placed with its rear end section 7b over the upper body 19 of the securing element 16 such that the upper body 19 protrudes through the elongated hole 17 of the end section 7b above the end section 7b. The rear end section 7a is thereby connected to the bearing section 8.

[0093] It is also possible for the pad retaining bracket 7 to be first applied without the securing element 16 such that the elongated hole 17 is located congruently over the elongated hole 22 of the bracket 21. The longitudinal axes of the elongated holes 17 and 22 are arranged parallel to each other and parallel to the brake disc 2. The securing element 16 is then guided through the elongated hole 17 of the rear end section 7b of the pad retaining bracket 7 with the lower body 19' leading and then inserted through the elongated hole 22 of the bracket 21. The upper body 19 is then located with its underside at the level of the upper edge of the elongated hole 17 of the rear end section 7b of the pad retaining bracket 7.

[0094] To lock the pad retaining bracket 7, the securing element 16 is then rotated 90° from this unlocked position of the securing device 10 about the rotation axis 16a such that the upper body 19 of the securing element 16 rests with its contact surfaces 19c, 19d in a form-fitting manner on the surfaces of the respective recesses 18, 18a. At the same time, the lower body 19' of the securing element 16 also rotates 90° through the contour into the recesses 23, 24 such that its contact surfaces 19'c and 19'd are in contact with the corresponding surfaces of the recesses 23, 24, with the end sections 19'a, 19'b of the lower body 19' each being in contact with the walls 23a, 24a of the recesses 23, 24 with their outer sides. There is minimal play with a little air between the flat surface 19'h of the lower body 19' and the surface of the bottom 25a of the receptacle 25.

[0095] In this locked state of the securing device 10, the securing element 16 is secured by the projections 19g, 19'g against rotation about the rotation axis 16a, since the rear end section 7b of the pad retaining bracket 7 exerts a tensile force in the z-direction on the upper body 19 of the securing element 16.

[0096] In this way, the securing device 10 forms an axial securing of the pad retaining bracket 7 in the y-direction with respect to the brake caliper 3 via the positive connection of the upper body 19 of the securing element 16 with the recesses 18, 18a of the back-side end section 7b of the pad retaining bracket 7 and the positive connection of the lower body 19' of the securing element 16 with the recesses 23, 24 of the holder 21 fastened in a form-fitting manner in the receptacle 25 of the back section 3b of the brake caliper 3. A radial securing of the pad retaining bracket 7 in the z-direction is made possible by the support of the upper body 19 on the back-side end section 7b of the pad retaining bracket 7 and the support of the lower body 19' on the recesses 23, 24 of the holder 21 fastened in the back section 3b of the brake caliper 3.In addition, a tangential securing of the pad retaining bracket 7 in the x-direction is also effected by the above-described fixation of the securing element 16 both in the end section 7b of the pad retaining bracket 7 and via the holder 21 in the back section 3b of the brake calliper 3.

[0097] In Fig. 13 shows a schematic perspective view of a third embodiment of the disc brake 1 with a securing device 10. Fig. 14 shows an enlarged schematic perspective view of the securing device of the third embodiment according to Fig. 13. Fig. 15 shows a schematic sectional view of the securing device 10 of the third embodiment according to Fig. 13. Fig. 16 shows a schematic perspective view of a hood element 28 of the securing device of the third embodiment according to Fig. 13.

[0098] In the third embodiment, the brake caliper 3 has the holding section 9 for the rear end section 7b of the pad retaining bracket 7, which has the corresponding opening 7d. The rear end section 7b of the pad retaining bracket 7 is arranged in the recess 9a in the holding section 9. An upper side of the rear end section 7b is in contact with the cover surface 9b of the recess 9a.

[0099] The securing device 10 has a securing element 26 with an axis 26a and a hood element 28 and, in this third exemplary embodiment, enables the pad retaining bracket 7 to be secured with respect to the brake caliper 3 in the axial direction (y-direction).

[0100] The securing element 26 is attached to the pad retaining bracket 7 and interacts with the cover element 28. The cover element 28 is mounted on the upper side of the pad backing plate 4'a of the back-side brake pad 4'.

[0101] The securing element 26 is designed here as a screw or bolt with a head 26b, a body 26c, and an end portion 26d. The pad retaining bracket 7 has an extension of its body in the form of a retaining portion 27, which protrudes in the longitudinal axis of the pad retaining bracket 7 into the opening 7d between the transition portions 7c in an xy plane, as shown in Fig. 14 and Fig. 15 is clearly visible. The holding section 27 is provided centrally with a through-opening 27a through which the securing element 26 extends with its body 26c. The securing element 26 can be a screw, for example. In this case, the through-opening 27a can be provided with a corresponding thread for the screw so that it can be fastened to the pad retaining bracket 7. It is also conceivable for the securing element 26 to be a bolt which is firmly connected to the pad retaining bracket 7 by means of a press fit between its body 26c and the through-opening 27a.

[0102] The head 26b of the securing element 26 is designed here as a hexagonal head and rests with its underside on a support surface 27b of the holding section 27. The end section 26d of the securing element 26 protrudes downward from the underside of the holding section 27 and engages with the hood element 28.

[0103] The hood element 28 is in Fig. 16 in a perspective view seen from the back portion 3b of the brake caliper 3 and comprises a base plate 28a, a back plate 28b, a tongue 28c, two arms 28d, a connector 28e and a holding portion 28f with a through opening 28g.

[0104] The base plate 28a is essentially rectangular and, when installed, lies as shown in Fig. 15, in an xy plane. On a side of the base plate 28a facing the brake disc 2, the back plate 28b is attached at a right angle downwards (in an xz plane). The back plate 28b is trapezoidal, with the lower side of the back plate 28b forming a short base side of the trapezoid and being connected to the tongue 28c. The tongue 28c is attached at a right angle to the back plate 28b and runs parallel to the base plate 28a in the y direction.

[0105] On the side of the base plate 28a facing the back section 3b of the brake caliper 3, an arm 28d is attached to each corner. The arms 28d extend in an xz plane parallel to the back plate 28b. The lower sections of the arms 28d extend obliquely toward each other and are connected at their ends by the connector 28e, which extends in the x-direction parallel to the back plate 28b.

[0106] The tongue 28c lies under the connector 28e and protrudes from it in the y-direction. The connector 28e and the tongue 28c are in the installed state of the hood element 28, which is Fig. 15, firmly connected to each other, e.g. welded.

[0107] The base plate 28a is also connected, on the side facing the back section 3b of the brake caliper 3, to the holding section 28f, which lies in the same xy plane of the base plate 28a. The through-opening 28g is formed as an elongated hole in the holding section 28f, with a longitudinal axis of this elongated hole running in the x-direction. A contour of the holding section 28f corresponds to the opening defined by the arms 28d and the connector 28e.

[0108] The hood element 28 is, for example, a stamped and bent part.

[0109] When installed (see Fig. 15) the tongue 28c of the hood element 28 extends through the through opening 14 through the pad back plate 4'a of the back-side brake pad 4' and is firmly connected, e.g. welded, to the connector 28e after assembly.

[0110] The base plate 28a of the hood element 28 is in contact with the underside 7k of the pad retaining bracket 7. The pad retaining spring 5' of the back-side brake pad 4' extends beneath it. A section of the pad back plate 4'a is arranged between the pad retaining spring 5' and the tongue 28c. The back plate 28b, the arms 28d, and the connector 28e of the hood element 28 run parallel to the pad back plate 4'a of the back-side brake pad 4'.

[0111] The holding section 28f of the hood element 28 extends under the pad retaining bracket to below its holding section 27. The securing element 26 engages with the hood element 28 in that the end section 26d extends through the through opening 28g of the holding section 28f of the hood element 28 in the z-direction.

[0112] The pad retaining bracket 7 is locked in the axial direction (y-direction) by the securing device 10 in that the securing element 26, which is firmly connected to the holding section 27 of the pad retaining bracket 7, positively engages the through-opening 28f of the hood element 28, wherein the hood element 28 is attached to the back-side brake pad 4'. Since the back-side brake pad 4' is received by the back section 3b of the brake caliper 3 and, in this disc brake 1 with the brake caliper 3 in sliding caliper design, does not exhibit any relative movement to the back section 3b, the axial locking of the pad retaining bracket 7 in this third embodiment with respect to the brake caliper 3 is thus enabled.

[0113] A tangential fixing of the pad retaining bracket 7 in the x-direction as well as a radial locking of the pad retaining bracket 7 in the z-direction is achieved by the interaction of its rear end section 7b with the holding section 9 of the rear section 3b of the brake caliper 3.

[0114] The embodiments described above do not limit the invention, which can be modified within the scope of the appended claims.

[0115] For example, it is conceivable that the securing element 26 of the third embodiment can be designed as a pin. List of reference symbols 1 disc brake 2 brake discs 2a Brake disc rotation axis 3 brake caliper 3a clamping section 3b back section 3c connecting section 4, 4' brake pad 4a, 4'a covering backing plate 4b, 4'b friction lining 5.5' pad retaining spring 6 Opening 7 Pad retaining brackets 7a, 7b final section 7c transition section 7d opening 7e page section 7f step area 7g recording section 7h slope 7i limitation 7j sidewall 7k subpage 8 storage section 9 stopping section 9a Recess 9b bottom 10 Safety device 11 Securing element 11a Rotation axis 12 arms 12a, 12b final section 12c connecting section 12d storage section 12e top 12f bottom 12g, 12h bevel 12i recess 13 Plateau 13a bore 13b Surface 14 passage opening 15 Hood element 16 Securing element 16a Rotation axis 17 slot 18, 18a recess 19, 19' body 19a, 19'a; 19b, 19'b end section 19c, 19'c; 19d, 19'd support surface 19e, 19'e; 19f, 19'f shoulder 19g, 19'g lead 19h, 19'h area 20 connecting section 21 Bracket 21a Body 21b Support surface 21c margin 21d top 22 slotted hole 23, 24 recess 23a,24a Wall 25 recording 25a Floor 25b Wall 26 Securing element 26a Axis 26b Head 26c Body 26d final section 27 stopping section 27a Passage opening 27b Support surface 28 Hood element 28a Base plate 28b back plate 28c Tongue 28d arm 28e connector 28f holding section 28g through hole BT brake carrier x, y, z Coordinates

Claims

[1] Disc brake (1) for a vehicle, comprising a brake disc (2) with a brake disc rotation axis (2a), a brake calliper (3), which is a sliding calliper, with an application section (3a) and a back section (3b), at least two brake pads (4, 4'), each with a pad back plate (4a, 4'a) provided with a pad retaining spring (5, 5'), which are each supported under pretension by a pad retaining bracket (7) detachably fastened to the brake calliper (3), and of which a brake pad (4) on the application side is assigned to the application section (3a), and a back-side brake pad (4') is assigned to the back section (3b), as well as a securing device (10) for securing the position of the pad retaining bracket (7) in relation to the brake calliper (3), wherein the securing device (10) has a securing element (11, 16) which can be rotated from an unlocked position into a locked position, in which the position of the pad retaining bracket (7) in relation to the brake calliper (3) is secured by the securing device (10), and back again, wherein the securing element (11) is arranged on or in the back section (3b) of the brake calliper (3) so as to be rotatable about an axis of rotation (11a) which runs perpendicular to the brake disc rotation axis (2a), and in the locked position is in engagement with a back-side end section (7b) of the pad retaining bracket (7), wherein the rear end portion (7b) of the pad retaining bracket (7) has a receiving portion (7g) which engages with the securing element (11) in the locked position, characterized by , that the securing element (11) has an arm (12) which is connected to a bearing section (12d) which is inserted in the back section (3b) of the brake calliper (3) in a receptacle (13a) so as to be rotatable about the axis of rotation (11a). [2] Disc brake (1) according to claim 1, characterized by that the arm (12) of the securing element (11) in the locked position is in positive engagement with the receiving section (7g) of the back-side end section (7b) of the pad retaining bracket (7), wherein the back-side end section (7b) of the pad retaining bracket (7) is arranged in a recess (9a) of a holding section (9) of the back section (3b) of the brake calliper (3). [3] Disc brake (1) according to claim 2, characterized byin that the arm (12) in the locked position is in positive engagement with the receiving portion (7g) of the back-side end portion (7b) of the pad retaining bracket (7), wherein at the same time an upper side (12e) of the arm (12) is in contact with a cover surface (9b) of the recess (9a) of the holding portion (9) of the back portion (3b) of the brake calliper (3). [4] Disc brake (1) according to one of the preceding claims, characterized by that the arm (12) is provided with at least one inclined surface (12g) which is intended to cooperate with at least one slope (7h) of a step of the back-side end section (7b) of the pad retaining bracket (7) when the locking element (11) assumes the locked position. [5] Disc brake (1) for a vehicle, comprising a brake disc (2) with a brake disc rotation axis (2a), a brake calliper (3), which is a sliding calliper, with an application section (3a) and a back section (3b), at least two brake pads (4, 4'), each with a pad back plate (4a, 4'a) provided with a pad retaining spring (5, 5'), which are each supported under pretension by a pad retaining bracket (7) detachably fastened to the brake calliper (3), and of which a brake pad (4) on the application side is assigned to the application section (3a), and a back-side brake pad (4') is assigned to the back section (3b), as well as a securing device (10) for securing the position of the pad retaining bracket (7) in relation to the brake calliper (3), wherein the securing device (10) has a securing element (16) which can be rotated from an unlocked position into a locked position, in which the position of the pad retaining bracket (7) in relation to the brake calliper (3) is secured by the securing device (10), and back again, wherein the securing element (16) is arranged on or in the back section (3b) of the brake calliper (3) so as to be rotatable about an axis of rotation (16a) which runs perpendicular to the brake disc rotation axis (2a), and in the locked position is in engagement with a back-side end section (7b) of the pad retaining bracket (7), wherein the rear end portion (7b) of the pad retaining bracket (7) has a receiving portion (7g) which engages with the securing element (16) in the locked position, characterized by , that the securing device (10) comprises the securing element (16) and a holder (21), wherein the holder (21) is arranged in or on the back section (3b) of the brake calliper (3), and that the receiving section (7g) of the back-side end section (7b) of the pad retaining bracket (7) is formed in the form of an elongated hole which extends in the longitudinal direction of the pad retaining bracket (7) and is divided into two recesses (18, 18a) by a through-hole in the form of an elongated hole (17) arranged transversely to it, wherein on each side of the through-hole in the form of an elongated hole (17) one recess (18, 18a) of the recesses (18, 18a) is formed or countersunk into the end section (7b). [6] Disc brake (1) according to claim 5, characterized byin that the securing element (16) comprises an upper body (19) and a lower body (19') arranged in a mirror image thereto and a connecting section (20) which connects the bodies (19, 19'), wherein the bodies (19, 19') are designed in the manner of a toggle and are arranged with their longitudinal axes parallel to one another and each form a type of sliding block, wherein the axis of rotation (16a) runs through a longitudinal axis of the connecting section (20) and the bodies (19, 19'). [7] Disc brake (1) according to claim 6, characterized by that the upper body (19) is provided for cooperation with the elongated hole (17) and the receiving section (7g) of the back-side end section (7b) of the pad retaining bracket (7), wherein the lower body (19') is provided for cooperation with the holder (21). [8] Disc brake (1) according to claim 7, characterized byin that the holder (21) has a circular-cylindrical body (21a), one end of which has a support surface (21b) and the other end of which has an upper side (21d), the body (21a) having the axis of rotation (16a) in its longitudinal axis and being provided with a continuous elongated hole (22) and two molded-in recesses (23, 24), the recesses (23, 24) being arranged offset by 90° to the elongated hole (22) and lying in a plane parallel to the upper side (21d), the plane being arranged centrally between the upper side (21d) and the support surface (21b). [9] Disc brake (1) according to claim 8, characterized by that the recesses (23, 24) each have a curved wall (23a, 24a) and form a cross-section in their plane which is composed of two overlapping ellipses, wherein the recesses (23, 24) are separated from one another by the continuous elongated hole (22) and are arranged rotated by 90° to the elongated hole (22). [10] Disc brake (1) according to claim 9, characterized by that the holder (21) is arranged and fastened in a receptacle (25) in the back section (3b) of the brake calliper (3), wherein the upper side (21d) protrudes from the receptacle (25) and the elongated hole (22) is arranged with its longitudinal axis parallel to the brake disc (2), wherein the holder (21) and the receptacle (25) are arranged coaxially to the axis of rotation (16a). [11] Disc brake (1) according to claim 10, characterized bythat the securing element (16) is arranged in the unlocked position such that the upper body (19) is located with its underside at the level of an upper edge of the elongated hole (17) of the rear end section (7b) of the pad retaining bracket (7) parallel to the brake disc (2), and that the lower body (19') in the holder (21) is located next to the recesses (23, 24) likewise parallel to the brake disc (2), wherein the securing element (16) is rotated by 90° in the locked position and is arranged such that the upper body (19) is in positive engagement with its underside with the receiving section (7g) of the rear end section (7b) of the pad retaining bracket (7) parallel to the brake disc axis (2a), and that the lower body (19') in the holder (21) is in contact with the recesses (23, 24) is positively engaged and is also arranged parallel to the brake disc rotation axis (2a). [12] Disc brake (1) for a vehicle, comprising a brake disc (2) with a brake disc rotation axis (2a), a brake calliper (3), which is a sliding calliper, with an application section (3a) and a back section (3b), at least two brake pads (4, 4'), each with a pad back plate (4a, 4'a) provided with a pad retaining spring (5, 5'), which are each supported under pretension by a pad retaining bracket (7) detachably fastened to the brake calliper (3), and of which a brake pad (4) on the application side is assigned to the application section (3a), and a back-side brake pad (4') is assigned to the back section (3b), as well as a securing device (10) for securing the position of the pad retaining bracket (7) in relation to the brake calliper (3), wherein the securing device (10) comprises a securing element (26) and a hood element (28), wherein the securing element (26) is connected to the pad retaining bracket (7) and engages with the hood element (28) which is attached to the back-side brake pad (4'), wherein the securing element (26) is designed as a screw or a bolt with a head (26b), a body (26c) and an end portion (26d), wherein the head (26b) is fastened to the body (26c) at a central holding portion (27) of the pad retaining bracket (7), and the end portion (26d) is in engagement with the hood element (28) wherein the end portion (26d) of the securing element (26) extends through a through opening (28g) of the hood element (28) perpendicular to the brake disc rotation axis (2a), wherein the hood element (28) is mounted on the upper side of a pad back plate (4'a) of the back-side brake pad (4'), characterized by, that the through-opening (28g) is formed as an elongated hole in a holding section (28f) of the securing element (26), wherein a longitudinal axis of this elongated hole runs parallel to the pad back plate (4'a) of the back-side brake pad (4'). [13] Brake pad set for a disc brake (1) for a vehicle, comprising at least two brake pads (4, 4'), each with a pad backing plate (4a, 4'a) provided with a pad retaining spring (5, 5'), a pad retaining bracket (7) and a securing device (10), characterized byin that the securing device (10) comprises a securing element (26) and a hood element (28), wherein the securing element (26) is connected to the pad retaining bracket (7), and wherein the hood element (28) is attached to a back-side brake pad (4') of the at least two brake pads (4, 4') and has a through-opening (28g) as an elongated hole formed in a holding section (28f) of the hood element (28), wherein a longitudinal axis of this elongated hole runs parallel to the pad back plate (4'a) of the back-side brake pad (4').

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