WO2020038911A1

WO2020038911A1 - Disc brake for a utility vehicle, and brake pad set

Info

Publication number: WO2020038911A1
Application number: PCT/EP2019/072206
Authority: WO
Inventors: Johannes FARKAS; Josef ATZINGER; Paul Haberl-Günthner; Maximilian MÜNSTERER; Andreas Petschke; Martin PLEINTINGER; Josef Schropp; Christian STÖGER
Original assignee: Knorr-Bremse Systeme für Nutzfahrzeuge GmbH
Priority date: 2018-08-22
Filing date: 2019-08-20
Publication date: 2020-02-27
Also published as: DE102018120512A1

Abstract

A disc brake (10) for a utility vehicle, having a brake caliper (1) which engages over a brake disc (2), is in the form of a sliding caliper, is fastened to a stationary brake carrier (6) and has a central opening (9) over the brake disc (2). The disc brake comprises two brake pads (3, 3'), which are arranged in the brake caliper (1), can be moved in opposite directions, and each have a lining carrier plate (4, 4') and a friction lining (5, 5') fastened thereto, and of which an action-side or application-side brake pad (3) can be pressed against the brake disc (2) by means of an application device via at least one brake piston. The disc brake also comprises at least one spreading and centring device (8, 8a) by means of which the brake caliper (1) can be returned after a displacement caused by braking and after a release of the brake, the spreading and centring device (8, 8a) having resilient spring arm units (19) which act on the mutually opposing brake pads (3, 3'), the spring arm units (19) acting directly or indirectly outside the friction linings (5, 5') in at least two attachment interfaces (A1, Α'1; A2, A'2), spaced from each other and from the centre, of the brake pads (3, 3'), and the spring arm units (19, 190) being connected to a stationary connection element (18, 180), the connection element (18) being fastened to the stationary brake carrier (6) on a holding device (30).

Description

DESCRIPTION

Disc brake for a commercial vehicle

and brake pad set

The invention relates to a disc brake for a commercial vehicle according to the preamble of claim 1. The invention also relates to a brake pad set.

In the case of a disk brake of the generic type, also known as a sliding caliper brake, in the event of braking by means of an application device which can be actuated pneumatically or by an electric motor, an action-side brake pad is pressed against a vehicle-side brake disk. In the further course of the braking process, the brake caliper, relative to the brake disc, is shifted against the direction of application of the brake pad on the action side, and entrains and presses the opposite, brake pad on the other side of the brake disc.

After the brake is released, in the known disc brake the brake caliper remains in this position, in which the brake pads, but at least the reaction-side brake pad, are pressureless but rubbing against the brake disk. The residual grinding moments of the brake pads that occur in ferry operation have a disadvantage in that they lead to increased fuel consumption as well as to a reduction in the service life of the components involved, namely the brake disc and the brake pads.

There is a slight loosening of the brake pads in ferry operation, for example due to a wobble of the brake disc as well as shocks and lateral accelerations when cornering. However, these effects are not sufficient to effectively prevent the residual grinding moments mentioned.

The generic DE 10 2016 124 310 A1 describes a disc brake with a spreading device. The brake caliper can be returned by means of the spreading device after the brake has been displaced and released, the spreading device being on the opposite brake pads has resilient spring arm units, the spreading device being arranged in a central opening and the spring arm units acting directly or indirectly outside the friction linings in at least two connection interfaces of the brake linings which are spaced apart from one another in the center. The spring arm units are connected to a stationary connection element in at least one connection interface with at least one connection element.

The invention has for its object to improve a disc brake of the generic type in order to increase the service life of the brake pads and the brake disc and to reduce the overall operating costs.

Another task is to create an appropriate brake pad set.

This object is achieved by a disc brake with the features of claim 1.

The further object is achieved by a brake pad set with the features of claim 17 and by a combination with the features of claim 19.

In the disc brake according to the invention, a residual grinding torque after a brake application can be effectively prevented or significantly minimized. Both the brake caliper and the brake pads are actively reset by a spreading and centering device.

The function of the spreading and centering system is divided into two main functions, centering the brake caliper and resetting the brake pads.

A disc brake according to the invention for a commercial vehicle, with a brake caliper overlapping a brake disc and designed as a sliding caliper, which is fastened to a stationary brake carrier and has a central opening above the brake disc, two oppositely movable brake pads arranged in the brake caliper and one pad carrier plate thereon attached brake pads, of which an action-side or application-side brake pad can be pressed against the brake disc by means of an application device via at least one brake plunger, and at least at least one spreading and centering device (8, 8a), with which the brake caliper (1) can be traced after the brake-induced shifting and releasing of the brake, the spreading and centering device having resilient spring arm units acting on the opposing brake pads, wherein the spring arm units act directly or indirectly outside the friction linings in at least two connection interfaces of the brake linings which are spaced apart from one another in the center, the spring arm units being connected to a stationary connection element, the connection element has, which is attached to a folding device on the stationary Brake carrier is attached.

A particular advantage here is that the folding device can be connected in a simple manner both to the spreading and centering device and to the stationary brake carrier. So only minor changes to the brake carrier are required. In other words, the folding device forms a frame, on which the spreading and centering device is attached in a stationary manner, which presses the brake pads away from the brake disk by means of spring elements and centers the brake caliper.

Further advantageous developments of the invention are specified in the subclaims.

In one embodiment, the spreading and centering device is arranged in the central opening, the folding device comprising two receptacles, with which fastening sections of the connecting element engage positively or / and non-positively. This results in a simple assembly of the spreading and centering device.

It is also advantageous that the receptacles of the folding device are designed as cylinder tubes with a cylindrical profile made of a metallic material with a cross section that corresponds to the cross section of the respective fastening section of the connecting element.

A particular advantage arises when the receptacles are each firmly connected at their lower ends to a fastening section, the respective fastening section being firmly connected to a respective folding section of the brake carrier. Assembly is advantageously simple. In a further embodiment, the holding sections of the brake carrier protrude from a fastening side of the brake carrier. This enables a space-saving arrangement.

For simple fastening, it is advantageous that the holding device has a fastening device which is attached to a fastening section on a bridge section of the brake carrier and comprises a base body with two support arms, each with a receptacle.

For this purpose, the base body can be firmly attached to the bridge section of the brake carrier. It is advantageous for assembly if the base body is attached to the brake carrier by means of a clamping effect. In addition, no or only minor machining steps are required for the brake carrier.

A particularly space-saving design is achieved if the receptacles are arranged between the brake carrier and an application section of the brake caliper.

In an alternative embodiment, the holding device can have at least two clamp elements which are fixedly connected to the connecting element. Additional processing of the brake carrier can be kept to a minimum.

In a further embodiment, the clamp elements each have a cross member, two legs, two side parts and two feet and are arranged in the brake carrier on the outlet side and inlet side between opposite inner walls of the brake carrier and opposite inner sides of brake carrier horns of the brake carrier. This advantageously saves space.

It is further provided that the clamp elements are fixed in the brake carrier by a clamping action, which results in an advantageous assembly.

For an advantageously simple assembly, the connection interfaces are arranged on the lining carrier plates of the brake linings and have receiving openings, which are designed as through holes and / or blind holes.

In another alternative, the spreading and centering device comprises a holding device with two clamp elements, each of which has a connecting element. ment form, and spring arm units. One advantage of this solution is that it is simple to install and saves space.

A further embodiment provides that the clamp elements each have a cross member, two legs, two side parts, two feet and two spring arm units, which are each attached to a side part, and in the brake carrier on the outlet side and inlet side between opposite inner walls of the brake carrier and opposite inner sides of brake carrier horns of the brake carrier are arranged. In this way it is achieved that an advantageously space-saving design is made possible.

In a further embodiment, it is provided that the spring arm units have fastening tabs on their free ends, which are firmly attached in a lateral area to a respective pad carrier plate of each brake pad in the connection interfaces. This version with the alternative spreading and centering device can be used on the one hand without the spreading and centering device which is arranged in the opening. On the other hand, both spreading and centering devices can be used and mutually support each other, whereby an effect of resetting the brake linings when the brake is released can advantageously be increased.

In a still further embodiment, the brake carrier has a guide section molded into each foot region of a brake carrier horn on the application side, the guide sections in each case engaging with a guide projection of the lining carrier plate of the application-side brake lining and in their shape with the guide projections of the brake carrier plate correspond, the brake lining on the application side being guided with the guide projections in the guide sections of the brake arm horns on the application side being displaceable in the direction of the axis of rotation of the brake disc and being fixed radially with respect to the axis of rotation of the brake disc. In this way, it is advantageously possible to use a shortened pad retaining bracket, with the central opening simplifying replacement and maintenance of the brake pads.

A brake pad set according to the invention of a disc brake described above comprises an application-side brake pad with a pad retaining spring and a rear brake pad with a pad retaining spring. The brake lining on the application side has at least two guide projections, each of which is on one side of a lining carrier plate of the brake application side on the application side. are molded on and protrude from the respective side. A particular advantage here is that the brake pads cannot be mixed up.

In a further embodiment, the lining holding spring of the brake lining on the application side is arranged in a middle section between a holding section and a recess below the holding section and each spring end of the lining holding spring extends beyond a respective end region of the lining carrier plate, the recess in a middle region of the lining carrier plate in the upper side of which is shaped in the longitudinal direction of the lining carrier plate such that the recess extends below the holding section and forms a longitudinal opening in which a central region of the lining retaining spring is arranged. In this way, the pad retaining spring can hold the brake pad on the application side without the pad retainer in the guide sections, the spring ends extending over the lateral end regions being supported on the associated brake carrier horns and using them as a thrust bearing.

A combination according to the invention of a brake pad set of a disc brake described above comprises an application-side brake pad with a pad holding spring, a rear brake pad with a pad holding spring, a shortened pad holding bracket and a spreading and centering device. This results in an advantageous set of brake pads with associated components for maintenance or changing pads.

Embodiments of the invention are described below with reference to the accompanying drawings.

Show it:

Figure 1 shows a partial section of a disc brake with a spreading and centering device according to the prior art in a schematic perspective plan view.

2 shows a partial section of an exemplary embodiment of a disc brake according to the invention with a first exemplary embodiment of an expanding and centering device according to the invention in a schematic perspective top view; 3 shows a schematic perspective illustration of a brake carrier with brake pads and the first exemplary embodiment of the spreading and centering device according to the invention according to FIG. 2;

Fig. 4 is an enlarged schematic partial perspective view of a

Variant of a folding device of a connecting element of the spreading and centering device according to FIG. 3 on the brake carrier;

5 shows a schematic perspective view of a folding device of a connecting element of the spreading and centering device according to FIG. 2;

Fig. 6 shows a second embodiment of an inventive

Spreading and centering device; and

7 is a perspective view of a clamp element as a connecting element of the second exemplary embodiment of the expanding and centering device according to FIG. 6.

The terms "top", "bottom", "left", "right" refer to the respective arrangements in the figures.

To differentiate between components, sections and functional groups on both sides of a brake disc 2 of a disc brake 10, the reference numerals of the components and functional groups on the side of the brake disc 2, which faces a caliper back 12 of a brake caliper 1 of the disc brake 10, each with a Use an apostrophe ( ^' ).

1 shows a partial section of a disc brake 10 with a spreading and centering device 8 according to the prior art in a schematic perspective top view.

Such a disc brake 10 according to the prior art is described in document DE 10 2016 124 310 A1. Reference is made to this document for structure and function; only a brief description is given below. A brake caliper 1, attached to a brake carrier 6 as a sliding caliper, engages over a brake disc 2 with a brake disc rotation axis 2a.

The brake caliper 1 comprises an application section 11, a caliper back 12 and two tension struts 13. The application section 11 has an interior space in which an application device, not shown, of the disc brake 10 is arranged. In this arrangement, the application section 11, the saddle back 12 and the tension struts 13 define a central opening 9 between them which spans the brake disc 2.

In the brake carrier 6, brake linings 3, 3 'are arranged in lining shafts between two respective brake carrier horns 17, 17' and can be displaced in the direction of the brake disk axis of rotation 2a. Each brake lining 3, 3 ″ has a lining carrier plate 4, 4 ″ and a friction lining 5, 5 ″ attached to it on the side facing the brake disc 2 on a lining side 4 a. The other side of the lining carrier plate 4, 4 ′ is referred to as the pressure side 4b.

With respect to a main direction of rotation of the brake disk 2, an inlet side ES and an outlet side AS are fixed on the disk brake 10.

A pad retaining bracket 16 is arranged above the brake pads 3, 3 'in the transverse direction of the opening 9 or in the direction of the brake disc rotation axis 2a between the application section 11 and the caliper back 12. The pad holding bracket 16 is held in a holding section 14 on the application section 11 and in a holding section 15 on the back of the caliper 12 and here presses with sections of its underside onto pad holding springs 7, T of the brake pads 3, 3 ', as a result of which they are in their Covering shafts are held.

Braking takes place by means of the application device arranged in the application section 11 of the brake caliper 1. The associated brake pad 3, referred to as the action-side or application-side brake pad, first contacts the brake disc 2 during braking. In the further course, the reaction forces that occur cause the brake caliper 1 to be shifted in the opposite direction, taking the reaction-side brake pad 3 'with it, until it also comes into contact with the brake disc 2. The reaction-side brake pad 3 'is also called the rear-side brake pad and further distinguished by the reference symbol 3 'from the brake lining 3 on the application side.

In order to prevent a residual grinding moment, a spring assembly is used, which on the one hand has a connection to a stationary component (e.g. brake carrier 6) and on the other hand presses the brake pads 3, 3 'away from the brake disc 2 in the direction of the brake disc rotation axis 2a via spring action.

Such a spring assembly is provided as a so-called spreading and centering device 8.

After the brake has been released, the two opposite brake pads 3, 3 'are released from the brake disc 2 by means of the spreading and centering device 8 and moved away from the brake disc 2 in the direction of the brake disc axis of rotation 2a such that the brake pads 3 are opposite the brake pads 3 , 3 'runs freely. The brake pads 3, 3 'move in opposite directions away from each other.

The spreading and centering device 8 here engages in the upper region of the lining carrier plates 4, 4 ″ of the opposing brake linings 3, 3 ″, acting in the same way against the application direction in connection interfaces A1, A2; AΊ, A’2. In this way, the brake pads 3, 3 ′ are acted upon by restoring forces from the spreading and centering device 8 in their upper regions.

The spreading and centering device 8 comprises a connecting element 18, two spring arm units 19, each with two spring arms 19a, 19’a, which are attached to the connecting element 18 so as to be displaceable in pairs via a connecting interface 20.

The connecting element 18 is C-shaped, stationary on the brake carrier 6, with fastening sections 18e in receiving openings 17a on brake carrier horns 17, in fastening interfaces B1, B2 and bil det a folding for the spring arm units 19th

The two spring arms 19a, 19'a of each pair of the spring arm units 19 are mirror images of the central section 18a of the connecting element 18. The pairs of spring arms 19a, 19'a are arranged opposite one another in the transverse direction of the opening 9 in such a way that they each have an inner end facing the center of the opening 9 on the connecting element 18 via a connection interface 20 by means of one each Connecting element 21 (see FIG. 2) are fastened, their outer free ends interacting with the lining carrier plates 4, 4 'of the brake linings 3, 3' in such a way that these free ends as connection sections 19b, 19'b in the connection interfaces A1,

AΊ, A2, A’2 are in engagement with receiving openings 4c, 4’c of the pad carrier plates 4, 4 ’of the brake pads 3, 3’. The one pair of spring arms 19a, 19’a is arranged to the right of the center of the opening 9, the other pair of spring arms 19a, 19’a being arranged to the left of the center of the opening 9.

The connecting element 18 forms a stationary pleating for the spreading and centering device 8 on the brake carrier 6 and comprises a central section 18a, which is just running here and on which the connection interfaces 20 are slidably arranged. The central section 18a is arranged in a center plane of the brake disk 2, running tangentially to the brake disk 2, above the latter. The central section 18a is followed on each side by connecting sections 18b, 18c, 18d and a fastening section 18e at the free ends. For example, the connecting element 18 extends from the center of the opening 9 on both sides to a brake carrier horn 17 of the lining shaft of the brake lining 3 on the application side.

In addition, the connecting element 18 forms a centering device for the brake caliper 1 in that the brake carrier 6, to which the connecting element 18 is fastened, forms a stationary part, which is displaceably mounted relative to the brake caliper 1, so that after releasing the brake and spreading the spreading and centering device 8, ie pushing apart the brake pads 3, the brake caliper 1 is guided into a centered position.

The connecting elements 21, and thus the connecting interfaces 20, can be rotated about a longitudinal axis of the central section 18a of the connecting element 18 and can be displaced in the direction of this longitudinal axis.

FIG. 2 shows a partial section of an exemplary embodiment of a disk brake 10 according to the invention with a spreading and centering device 8 according to the invention in a schematic perspective top view. 3 shows a schematic perspective illustration of a brake carrier 6 with brake pads 3, 3 'and the spreading and centering device 8 according to the invention of the exemplary embodiment according to FIG. 2, the brake carrier 6 being shown from its fastening side 6b. The brake carrier 6 is attached with the fastening side 6b in the installed state to a stationary part of a vehicle to which the disc brake 10 is assigned.

This embodiment of the disc brake 10 according to the invention with the spreading and centering device 8 according to the invention differs from the conventional disc brake 10 with the spreading and centering device 8 according to the prior art according to FIG. 1 at least in the following.

- Execution of the brake carrier 1

- Execution of the brake lining 3

- Execution and attachment of the pad holder 16 ’

- Execution of the spring arms 19a, 19’a

- Execution of the connecting element 18th

- Fastening interfaces B1, B2 of the connecting element 18

- Folding device 30 of the connecting element 18

The brake carrier 1 has a lining shaft between its brake carrier horns 17 for the brake lining 3 on the application side. The foot areas of the brake carrier horns 17 on the tensioning side are connected via a bridge section 6a, as shown in FIG. 3.

A guide section 6c is formed in each foot region of a brake carrier horn 17 on the application side. The guide sections 6c are each in engagement with a guide projection 4h of the lining carrier plate 4 of the brake pad 3 on the application side, and their shape corresponds to the guide projections 4h of the brake carrier plate 4. The guide sections 6c here have a rectangular cross section with rounded corners and extend each parallel to the brake disc axis of rotation 2a.

A guide projection 4h is formed on each side of the lining carrier plate 4 and protrudes from the respective side. With these guide projections 4h, the brake lining 3 on the application side is guided displaceably in the guide sections 6c of the brake carrier horns 17 on the application side in the direction of the brake disc rotation axis 2a, and in relation to the brake disc rotation axis 2a dial set. A further guidance of the lining carrier plate 4 is realized between the brake carrier horns 17 and the sides of the lining carrier plate 4.

The pad retaining springs 7, 7 'are each held on the tops of the pad carrier plates 4, 4' on projections or noses 4e, 4'e. Each pad retaining spring 7, 7 'is provided with an elongated hole 7b, 7’b at its ends 7a, 7’a. Each slot 7b, 7’b is assigned a nose 4e, 4’e and extends through the associated slot 7b, 7’b of the respective pad retaining spring 7, 7’.

The pad holding spring 7 of the brake pad 3 on the application side differs from the pad holding spring 7 ″ of the rear brake pad 3 ’on the one hand in that it is arranged in a middle section between a holding section 4f and a recess 4g below the holding section 4f. On the other hand, the spring ends 7b of the pad holding spring 7 extend beyond the lateral end regions of the pad carrier plate 4 and rest on contact surfaces 17b of the brake carrier horns 17.

The recess 4g is formed in a central region of the lining carrier plate 4 in the upper side thereof in the longitudinal direction of the lining carrier plate 4 such that the recess 4g extends below the holding section 4f and forms a longitudinal opening for a middle region of the lining holding spring 7. The holding section 4f is L-shaped, the recess 4g on its side facing the brake disc 2 being delimited by one leg of the holding section 4f in the longitudinal direction of the brake carrier plate 4, and another leg of the holding section 4f as a type of cover plate in the longitudinal direction of the brake carrier plate 4 delimits the recess 4g from above, but is open toward the fastening side 6b of the brake carrier 6, so that the lining retaining spring 7 is inserted under the holding section 4f from this side.

In this way, when the brake pad 3 is applied on the tensioning side, the pad holding spring 7 is preloaded such that it exerts a radial force on the pad carrier plate 4 and thus on the brake pad 3 via the holding section 4f, as a result of which the guide projections 4h of the pad carrier plate 4 are in the guide - Rungs sections 6c of the brake carrier 6 are pulled up to the guide sections 6c, rest there and are thus held in the lining shaft. The term “upward” is to be understood as a radial direction that points away from the brake disk axis of rotation 2a. The brake carrier 6 has on its fastening side 6b in the region of the transitions from the ends of the bridge section 6a to the foot regions of the brake carrier horns 17 in each case a holding section 6d protruding from the fastening side 6b in the direction of the brake disc rotation axis 2a. The holding sections 6d serve to fasten the connecting element 18. This is described in more detail below. The holding sections 6d can be formed in one piece with the brake carrier 6. But it is possible that they or the like as additional parts on the brake carrier 6 with screws, rivets. are attached.

The rear brake pad 3 ’is held by a short pad holder 16’ in the pad shaft between the brake carrier horns 17 ’, as can be seen from FIG. 2. The pad retaining bracket 16 ′ is removably attached to the retaining section 15 in the middle of the saddle back 12. The holding section 15 has two projections through which a holding element 15a, e.g. a bolt, inserted and axially secured. The pad retaining bracket 16 'lies at one end under the retaining element 15a, through which it is fixed radially. A fixation in the axial direction in the direction of the brake disk axis of rotation 2a is made possible by side lugs 22 which are in contact with the holding sections 15. The lateral lugs 22 also offer the advantage that protection against installation can be achieved by a corresponding interference contour on the brake caliper 1 in the case of a disc brake 10 which is not designed / prepared for a spreading and centering device 8, 8a. The covering bracket 16 ″ is cranked upwards towards the center of the opening 9 and tapers to its other end. The underside of the pad retainer 16 'is in direct or indirect contact with the pad retainer spring 7 of the rear brake pad 3' near the offset. In this way, the rear brake lining 3 ’is held in its lining shaft. The other, tapered end of the pad retainer 16 'is arranged in the middle of the opening 9 above the brake disc 2 and forms a radial support or fixing of the spreading and centering device 8. This is the underside of the tapered end of the pad retainer 16 'in contact with the central portion 18a of the connecting element 18.

The description for one spring arm unit 19 applies to the other spring arm unit 19 in a mirror-image manner, as can be clearly seen from FIG. 2.

The connecting element 18 and the spring arm units 19 here consist of a wire material, for example with a circular cross section. Each spring arm 19a, 19'a has a straight, rod-shaped body with an inner and an outer end. The inner ends point to the center of the opening 9, the outer ends each pointing to the edge of the opening 9 of the tension struts 13.

The inner ends of both spring arms 19a, 19'a are close to each other with a short distance in the direction of the brake disc rotation axis 2a, run parallel to one another and parallel to the straight central section 18a of the connecting element 18 and are connected via a curved connecting section 19f , The curved connecting section 19f is guided over the connecting element 21 of the connecting interface 20, whereby this and the straight sections of the connecting section 19f are connected to the connecting element 21, e.g. about clamping effect. DE 10 2016 124 310 A1 gives a detailed description of the connection interfaces 20.

The spring arms 19a, 19’a each extend from the straight sections of the connecting section 19f in the manner of a V-shape downwards and outwards to the ends of the lining carrier plate 4, 4 ″ of the brake pads 3, 3 ’. In the further course, the spring arms 19a, 19'a each merge into a short intermediate section 19c which is angled further downward and which in turn merges with a further intermediate section 19d which is bent outwards and back somewhat towards the center , This curved intermediate section 19d is then adjoined by a short, further intermediate section 19e which runs straight to the lateral end of the lining carrier plate 4, 4 ′. The end of this straight intermediate section 19e is bent downward by approximately 90 ° and connected to the straight connecting section 19b, 19’b. The connecting sections 19b, 19'b extend into the respective associated receiving opening 4c, 4'c of the associated lining carrier plate 4, 4 'and are thus engaged with the respective connecting interface A1, AΊ, A2, A'2 ,

In the exemplary embodiment shown in FIG. 2, the connecting sections 19b, 19'b are bent downward and designed in a straight line. They are positively received in the receiving openings 4c, 4'c in the upper sides 4d, 4'd in corner areas of the respective pad carrier plate 4, 4 'of the brake pads 3, 3'. The receiving openings 4c, 4'c communicate with the shape of the connecting sections 19b, 19'b and are designed here as bores. The walls or the wall of a respective receiving opening 4c, 4'c forms a contact surface for the respective connection section 19b, 19'b. The receiving openings 4c, 4'c can NEN, for example, be designed as blind holes and / or as through holes. The receiving openings 4c, 4'c can have different cross sections, for example round, circular, oval, angular, the cross sections of the connecting sections 19b, 19'b of the spring arms 19a, 19'a accommodated in them having the respective cross section of the receiving openings 4c, 4'c communicate. However, it is also possible for round connecting sections 19b, 19'b to be inserted into square or oval receiving openings 4c, 4'c.

If the receiving openings 4c, 4'c are formed as blind holes, the ends of the connecting sections 19b, 19'b can also rest on the respective bottom of a blind hole, which can form a contact surface.

The receiving openings 4c of the lining carrier plate 4 of the tensioning side

Brake linings 3 are arranged differently from the receiving openings 4 ′ c of the lining carrier plate 4 ″ of the rear brake lining 3 ’. While the receiving openings 4'c are formed in a lowered upper side 4'd of the rear facing carrier plate 4 ', the receiving openings 4c of the facing facing carrier plate 4 are introduced next to the lugs 4e facing outward. In the exemplary embodiment shown, the lugs 4e are shortened on their outer sides to approximately half their length (in the longitudinal direction of the lining carrier plate 4). The elongated holes 7b are each arranged above the receiving openings 4c. The slots 7b can also in their

Be elongated in the longitudinal direction. The connecting sections 19b therefore each extend through the elongated holes 7b into the associated receiving openings 4c.

2 and 3, in contrast to the connecting element 18 of the conventional disc brake 10 according to FIG. 1, comprises a shortened straight central section 18a on which the connecting interfaces 20 are arranged so as to be displaceable. The central section 18a is arranged in a central plane of the brake disk 2 and extends tangentially to the brake disk 2 and extends over approximately a quarter of the length of an imaginary straight center line of the opening 9. The central section 18a is different on each side 1 to the connecting element 18 according to FIG. 1, a connecting section 18b bent to the application section 11 by 90 °. The central section 18a and the two curved connecting sections 18b form a U-shape. At the end of each connection section 18b, a short, straight connection section 18c is formed in each case, which each merges outwardly by about 45 ° bent connecting portion 18d. These connecting sections 18d are each connected to a straight, rod-shaped further connecting section 18f, which extends over the brake pad 3 on the application side and behind it, between the pressure side 4b of the brake pad carrier plate 4 or the fastening side 6b of the brake carrier 6 and the application section 11 of the brake caliper 1 merges into a connecting section 18g bent downward by approximately 90 °. Each connecting section 18g is extended into the fastening section 18e.

The fastening sections 18e are fastened in the fastening interfaces B1, B2 in a holding device 30 to the stationary brake carrier 6.

The holding device 30 here comprises two receptacles 23, 24. Each fastening section 18e is inserted into a respective receptacle 23, 24 and engages with it in a positive or / and non-positive manner. A positive engagement can e.g. by pressing, riveting, welding or the like. be trained. A connection using a game fit is also conceivable.

The receptacle 23 forms the first fastening interface B1 with the one fastening section 18e, and the receptacle 24 forms the second fastening interface B2 with the one fastening section 18e.

The receptacles 23, 24 are formed here as cylindrical tubes with a cylindrical profile made of a metallic material with a circular cross section, their longitudinal axes running vertically in FIG. 3. The cross-section corresponds to the cross-section of the respective fastening section 18e of the connecting element 18. The cross-sectional shapes can also be designed differently, e.g. oval, rectangular, polygonal.

The receptacles 23, 24 are each connected at their lower ends to a square fastening section 23a, 24a, e.g. welded, screwed, riveted, pressed or the like, the fastening sections 23a, 24a each resting on one of the holding sections 6d of the brake carrier 6 and being firmly connected to them, e.g. screwed, riveted, welded, pressed or the like.

The receptacles 23, 24 have a height which corresponds approximately to a height of the lining carrier plate 4 in its lateral end regions. In this way, the connecting element 18 is connected in a stationary manner to the brake carrier 6 and serves as a carrier and holder for the spring arm units 19.

3, inner sides 6e, 6’e, an underside 6f of the brake carrier 6 and inner sides 17d, 17’d of the brake carrier horns are indicated. This will be discussed further below.

FIG. 4 shows an enlarged schematic partial perspective view of a variant of the holding device 30 of the connecting element 18 of the spreading and centering device 8 according to FIG. 3 on the brake carrier 6.

4, the brake carrier 6 is shown as seen in FIG. 3 from its fastening side 6b. The holding device 30 in this variant has a fastening device 25. The fastening device 25 is attached to the bridge section 6a of the brake carrier 6 on the fastening side 6b.

The fastening device 25 comprises a base body 26 and two support arms 27, 28, each with a receptacle 29, 29a.

The base body 26 has at least one or more fastening plates 26a, 26b, which e.g. a U-shape or the like form, and is firmly attached to the bridge section 6a with these. This can e.g. by clamping, screwing, riveting, welding, pressing or the like. be executed.

On each short side of the mounting plate 26a, which is arranged on the bridge section 6a on the mounting side 6b of the brake carrier 6, a tab-shaped support arm 27, 28 is angled facing away from the bridge section 6a. The support arms 27, 28 are arranged, for example, from sheet metal and upright. Each support arm 27, 28 is connected at its free end to the associated receptacle 29, 29a via a connecting section 27a, 28a. Each receptacle 29, 29a is here a hollow cylinder with a circular cross-section, the longitudinal axis of which in FIG. 4 extends perpendicularly to the brake disk rotation axis 2a or vertically. A tab 27b, 28b is arranged below each receptacle 29, 29a in such a way that it blocks a passage of the opening below the opening of the associated receptacle 29, 29a. The receptacles 29, 29a serve to receive the respective fastening section 18e of the connection element 18 and thus for the stationary attachment of the connection element 18 to the brake carrier 6. The fastening sections 18e are in positive engagement with the receptacles 29, 29a, the lower ends of the fastening sections 18e each rest in the blocked lower opening on the associated tab 27b, 28b. The fastening interfaces B1 and B2 are formed in this way.

The fastening device 25 can e.g. be formed as a stamped and bent part from sheet metal, the receptacles 29, 29a being rolled here. Of course, other versions are also possible, e.g. welded receptacles 29, 29a on the support arms 27, 28.

FIG. 5 shows a schematic perspective view of another holding device 30 of the connecting element 18 of the spreading and centering device 8 according to FIG. 2. 6 shows a second exemplary embodiment of an expansion and centering device 8a according to the invention.

FIG. 7 shows a clamp element 31 of the holding device 30 as a connecting element 180 with spring units 190 in a perspective view.

The holding device 30 comprises two clamp elements 31, one on the inlet side and one on the outlet side, on inner sides 17d, 17’d of the brake carrier horns 17,

17 ’jammed. 5 shows only the clamp element 31 on the outlet side AS. The other bracket element 31 is a mirror image and is arranged on the inlet side ES of the brake carrier 6. This is easy to imagine.

The clamp element 31 comprises a cross member 32, two legs 33, 33 ', two side parts 34, 34' and two feet 35, 35 '.

The cross member 32 is a rectangular plate with two long and two short sides. The cross member 32 is in Fig. 5 in a horizontal plane. A side part 34, 34 'is attached to each of the short sides. Each side part 34, 34 'lies at right angles to the cross member 32 in a vertical plane. The side parts 34, 34' are adapted to the shape of the brake carrier 6 by different shapes. A leg 33, 33 'is formed on each of the lower ends of the side parts 34, 34' and extends in the respective vertical plane. The legs 33, 33 'extend obliquely downwards. The feet 35, 35 'are attached in a loop-like manner to the lower ends of the legs 34, 34', each point outwards and lie in a substantially horizontal plane. In the installed state, the clamp element 31 is clamped with its side parts 34, 34 'between the opposite inner sides 17d, 17'd of the brake support horns 17, 17', the legs 33, 33 inside the brake support 6 on its opposite inner sides 6e , 6'e and the feet 35, 35 ', for example on the undersides 6f of the brake carrier 6 (see also FIG. 3), are clamped.

The associated connection element 18 is not shown here, but easily imaginable with the fol lowing exemplary description. The connecting element 18 has the central section 18 described above. Rod-shaped connecting sections are attached to the ends of this central section 18, which run obliquely in a central plane of the brake disc 2 like the central section 18a and extend over the cross members 32 of the clamp elements 31. The ends of these connecting sections are fastened centrally to the cross members 32. The associated connection element 18 is thus fixedly attached to the brake carrier 6.

It is also conceivable that the two clamp elements 31 arranged in the brake carrier 6 serve as fixing elements of another spring system of a spreading and centering device 8.

6 shows a second exemplary embodiment of an expansion and centering device 8a according to the invention. The spreading and centering device 8a comprises the folding device 30 with the clamp elements 31, which each form a connecting element 180, and spring arm units 190.

The connecting element 180 is based on the clamp element 31 according to FIG. 5 and is provided with the spring arm units 190. In this exemplary embodiment, there is a side part 34, 34 'of the clip element on each side

31 / connecting element 180 each have a spring arm unit 190 attached.

The spring arm units 190 each comprise a connecting section 36, 36 ″, a spring arm 37, 37 ″ and a fastening tab 38, 38 ″.

The spring arm 37, 37 'is attached at right angles to the outside via a connecting section 36, 36'. Each connecting section 36, 36 'extends in the associated lining shaft of the brake carrier 6 in an upper region of the brake carrier horns 17, 17' within a recess 17c, 17'c between lining carrier plate 4, 4 'of the respective brake lining 3, 3' and the associated brake carrier horn 17, 17 'in the direction of the pressure side 4b, 4'b of the lining carrier plate 4, 4' of the respective brake lining 3, 3 '. This is shown in Fig. 6 for the rear brake pad 3 '.

Fastening tabs 38, 38 ″ are attached to the free ends of the spring arms 37, 37 ″ bent here. On the respective pressure side 4b, 4’b of the lining carrier plates 4, 4’, the spring arms 37, 37’ are over the fastening tabs 38,

38 ’attached by means of rivet, weld or screw connection (etc.). In this way, connection interfaces D1, D’1; D2, D’2 formed. 6 shows only the connection interfaces D2, D’2 on the outlet side, the other connection interfaces D1, D’1 on the inlet side being only indicated, but easily imaginable.

The spring arms 37, 37 'are already pretensioned in the installed state and, after a brake application, bring about a restoring force on the application-side ("inner") brake pad 3 in a reset direction 39 and on the rear ("outer") brake pad 3 'an opposite reset direction 39', as indicated by the corresponding arrows in Fig. 6.

Through the fixed connection of the clamp element

31 / connecting element 180 as described above on the brake carrier 6 and by connecting the spring arm units 190 in the connecting interfaces D1, D’1; D2, D’2 on the brake pads 3, 3 ″ both have a spreading effect on the brake pads 3, 3 ’and a centering effect on the brake caliper 1.

Thus, the folding device 30 with the two clamp elements 31 and the spring arm units 190 attached to them can form an independent spreading and centering device 8a. This spreading and centering device 8a can also be used alone without the spreading and centering device 8, which has the spring arm units 19. It is of course also possible that both spreading and centering devices 8 and 8a can be used.

In this case, if both the first spreading and centering device 8 and the second spreading and centering device 8a are used, the clamp elements 31 have two functions. In the first function, the clamp elements 31 form the holding device 30 for the connecting element 18 of the first spreading and centering device 8, as explained above. In other words, the first spreading and centering device 8 then comprises the connecting element 18 and the spring arm units 19.

In the second function of the clamp elements 31, they each form a connection element 180 of the second spreading and centering device 8a. The second spreading and centering device 8a comprises the clamp elements 31 and the spring arm units 190 with the spring arms 37, 37 '.

In this way, the clamp element 31 as a holding device 30 is a component of both spreading and centering devices 8 and 8a.

FIG. 7 shows the clip element 31 as a connecting element 180 of the second exemplary embodiment of the spreading and centering device 8a according to FIG. 6 in a perspective view. The outlet-side clamp element 31 according to FIG. 6 is shown. The reference numerals entered in brackets refer to the inlet-side clamp element 31, which is a mirror image.

The invention is not restricted by the exemplary embodiments described above. It can be modified within the scope of the appended claims.

The clamp elements 31 can also be fastened with other fastening means, such as screws, rivets, pressings, welds and the like. be attached to the brake carrier 6.

LIST OF REFERENCE NUMBERS

1 brake caliper

2 brake discs

2a brake disc rotation axis

3, 3 ’brake pad

4, 4 ’topping plate

4a covering side

4b, 4’b printed page

4c, 4’c receiving opening

4d, 4’d top

4e, 4’e nose

4f holding section

4g recess

4h lead in leadership

5, 5 ’friction lining

6 brake carriers

6a bridge section

6b mounting side

6c guide section

6d holding section

6e inside

6f bottom

7, 7 'pad retaining spring

7a, 7’a spring end

7b, 7’b slot

8, 8 ’spreading and centering device

9 opening

10 disc brake

1 1 application section

12 saddle back

13 tension strut

14, 15 holding section

15a holding element

16, 16 ’rubber retaining bracket

17, 17 ’Bremträgerhorn

17a receiving opening

17b contact surface

17c recess 17d, 17'd inside 18, 180 connecting element 18a central section

18b, 18c, 18d, 18f, 18g connecting section 18e fastening section

19, 190 spring arm unit 19a, 19’a spring arm

19b, 19’b connecting section 19c, 19d, 19e intermediate section 19f connecting section 20 connecting interface 21 connecting element 22 nose

23, 24 recording

23a, 24a fastening section

25 fastening device

26 basic body

26a, 26b mounting plate 27, 28 support arm

27a, 28a connecting section 27b, 28b receiving section 29, 29a receiving

30 folding device

31 clip element

32 cross members

33, 33 ’leg

34, 34 ’side panel

35, 35 ’feet

36, 36 ’connecting section

37, 37 ’spring arm

38, 38 ’mounting bracket

39, 39 ’reset direction

A1, AΊ; A2, A’2 connection interface AS outlet side

B1, B2 mounting interface

D1, D’1; D2, D’2 connection interface ES inlet side

Claims

Expectations

1. Disc brake (10) for a commercial vehicle, with a brake disc (2) overlapping, designed as a sliding caliper (1), which is attached to a stationary brake carrier (6) and a central opening (9) above the brake disc (2 ) has two brake pads (3, 3 ') arranged in the brake caliper (1), against sensibly movable, each having a pad carrier plate (4, 4') and a friction lining (5, 5 ') fixed thereon, one of which is on the action side or . brake side (3), can be pressed against the brake disc (2) by means of a brake device via at least one brake plunger, and at least one spreading and centering device (8, 8a) with which the brake caliper (1) can be moved and released after braking sen the brake is traceable, the spreading and centering (8, 8a) on the opposite brake pads (3, 3 ') engaging springs has the spring arm units (19, 190), the spring arm units (19, 190) directly or indirectly outside the friction linings (5, 5 ’) in at least two connection interfaces (A1,

AΊ; A2, A’2; D1, D’1; D2, D’2) of the brake pads (3, 3 ’), the spring arm units (19, 190) having a fixed connecting element (18,

180) are connected,

characterized in that

the connecting element (18, 180) is attached to a folding device (30) on the stationary brake carrier (6).

2. disc brake (10) according to claim 1,

characterized in that

the spreading and centering device (8) is arranged in the central opening (9), the folding device (30) comprising two receptacles (23, 24; 29, 29a) with which fastening sections (18e) of the connecting element (18) are positively or / and engage non-positively.

3. disc brake (10) according to claim 2,

characterized in that

that the receptacles (23, 24; 29, 29a) of the folding device as cylindrical tubes with a cylindrical profile made of a metallic material with a cross section which corresponds to the cross section of the respective fastening section (18e) of the connecting element (18).

4. Disc brake (10) according to claim 3 characterized in that

the receptacles (23, 24) are each firmly connected at their lower ends to a fastening section (23a, 24a), the respective fastening section (23a, 24a) being connected to a respective holding section (6d) of the brake carrier (6 ) is firmly connected.

5. disc brake (10) according to claim 4,

characterized in that

the holding sections (6d) of the brake carrier (6) protrude from a fastening side (6b) of the brake carrier (6).

6. Disc brake (10) according to one of the preceding claims, characterized in that

the holding device (30) has a fastening device (25) which is attached to a fastening section (6b) on a bridge section (6a) of the brake carrier (6) and a base body (26) with two support arms (27, 28), each with a receptacle (29, 29a).

7. disc brake (10) according to claim 6,

characterized in that

the base body (25) is firmly attached to the bridge section (6a) of the brake carrier (6).

8. Disc brake (10) according to one of the preceding claims, characterized in that

the receptacles (23, 24; 29, 29a) are arranged between the brake carrier (6) and an application section (11) of the brake caliper (1).

9. Disc brake (10) according to one of the preceding claims, characterized in that

the holding device (30) has at least two clamp elements (31) which are firmly connected to the connecting element (18).

10. disc brake (10) according to claim 9,

characterized in that

the clamp elements (31) each have a cross member (32), two legs (33, 33 '), two side parts (34, 34') and two feet (35, 35 ') and in the brake carrier (6) on the outlet side and on the inlet side between opposite inner walls (6e, 6'e) of the brake carrier (6) and opposite inner sides (17d, 17'd) of brake carrier horns (17, 17 ') of the brake carrier (6) are arranged.

11. Disc brake (10) according to claim 10,

characterized in that

the clamp elements (31) are fixed in the brake carrier (6) by clamping action.

12. Disc brake (10) according to one of the preceding claims, characterized in that

the connection interfaces (A1, AΊ; A2, A'2) are arranged on the lining carrier plates (4, 4 ') of the brake linings (3, 3') and have receiving openings (4c, 4'c) which act as through holes and / or blind holes are trained.

13. Disc brake (10) according to one of the preceding claims, characterized in that

the spreading and centering device (8a) comprises a holding device (30) with two clamp elements (31), each of which forms a connecting element (180), and spring arm units (190).

14. Disc brake (10) according to claim 13,

characterized in that

the clamp elements (31) each have a cross member (32), two legs (33, 33 '), two side parts (34, 34'), two feet (35, 35 ') and two spring arm units (190), each on a side part (34, 34 ') are attached, and in the brake carrier (6) on the outlet side and the inlet side between opposite inner walls (6e, 6'e) of the brake carrier (6) and opposite inner sides (17d, 17'd) of brake carrier horns ( 17, 17 ') of the brake carrier (6) are arranged.

15. disc brake (10) according to claim 14,

characterized in that

The spring arm units (190) have fastening tabs (38, 38 ') at their free ends, which in a lateral area on a respective pad support plate (4, 4') of each brake pad (3, 3 ') in the connection cut (D1, D'1; D2, D'2) are firmly attached.

16. Disc brake (10) according to one of the preceding claims, characterized in that

the brake carrier (6) has a molded-in guide section (6c) in each foot region of an application-side brake support horn (17), the guide sections (6c) each having a guide projection (4h) of the lining carrier plate (4) of the application-side brake lining (3) in Stand in engagement and correspond in their shape with the guide projections (4h) of the brake carrier plate (4), the brake lining (3) on the brake application side (4h) in the guide sections (4h) in the guide sections (6c) of the brake brake arm carrier on the side (17) in the direction of Brake disc rotation axis (2a) slidably leads and is fixed radially with respect to the brake disc rotation axis (2a).

17. Brake pad set of a disc brake (10) according to one of the preceding claims, comprising an application-side brake pad (3) with a pad retaining spring (7), a rear brake pad (3 ’) with a pad retaining spring (7’),

characterized in that

the application-side brake pad (3) has at least two guide projections (4h), which are each formed on one side of a pad carrier plate (4) of the brake pad (3) to be tensioned and protrude from the respective side.

18. Brake pad set according to claim 17,

characterized in that

the pad holding spring (7) of the application-side brake pad (3) is arranged in a middle section between a gap section (4f) and a recess (4g) below the gap section (4f) and each spring end (7b) of the pad holding spring (7) over extends a respective end region of the lining carrier plate (4), the recess (4g) being formed in a central region of the lining carrier plate (4) in its upper side in the longitudinal direction of the lining carrier plate (4) such that the recess (4g) is below the Holding section (4f) extends and forms a longitudinal opening in which a central region of the pad retaining spring (7) is arranged.

19. Combination of a brake pad set according to claim 17 or 18 of a disc brake (10) according to one of claims 1 to 16, with an application-side brake pad (3) with a pad retaining spring (7), with a rear brake pad (3 ') with a pad retaining spring ( 7 '), with a pad retaining bracket (16') and with a spreading and centering device (8, 8a).