WO2016034377A1

WO2016034377A1 - Disc brake of a motor vehicle, brake caliper, brake lining and arrangement of at least one brake lining in a lining shaft opening of a brake caliper

Info

Publication number: WO2016034377A1
Application number: PCT/EP2015/068468
Authority: WO
Inventors: Johann Iraschko; Manfred SCHÖNAUER; Robert Theil; Michael Hidringer; Thomas Beck; Nathalie Roth; Peter Sebastian
Original assignee: Knorr-Bremse Systeme für Nutzfahrzeuge GmbH
Priority date: 2014-09-03
Filing date: 2015-08-11
Publication date: 2016-03-10
Also published as: DE102014112664A1

Abstract

The invention relates to a disc brake of a motor vehicle, particularly of a utility vehicle, comprising a brake caliper (4) that reaches over a brake disc (2), a brake carrier (3) which can be positionally fixed on the vehicle and has entry-side and exit-side carrier lugs (31, 32), at least one brake lining (5, 6) which is received in the brake carrier (3) and comprises a lining carrier plate (53, 63) and a friction lining (52, 62), wherein the entry-side carrier lug (31) and a guide surface (54, 64) of the lining carrier plate (53, 63), which is close to said carrier lug, engage with each other in a positive fit, as viewed radially to an axis of rotation (A) of the brake disc (2). According to the invention, a sliding bearing, which is designed as a fixed bearing (9), is provided between the brake caliper (4) and the brake carrier (3), whereby the brake caliper (4) is guided relative to the brake carrier (3) so as to be axially displaceable relative to the axis of rotation of the brake disc (2) and can be pivoted about an axis of rotation which is parallel to the axis of rotation (A) of the brake disc (2). Mutually corresponding first and second locking means (7, 10, 11, 41, 52, 62), which, in the mounted state, prevent the pivoting of the brake caliper (4) about the axis of rotation of the fixed bearing (9), are arranged on at least one of the brake linings (5, 6) and on the brake caliper (4). The invention further relates to a brake caliper, a brake pad and an arrangement of at least one brake pad (5, 6) in a lining channel opening (43) of a brake caliper (4).

Description

Disc brake of a motor vehicle, brake caliper, brake pad and arrangement of at least one brake pad in a lining shaft opening of a brake caliper

The present invention relates to a disc brake of a motor vehicle according to the preamble of claim 1, a brake caliper, a brake lining and an arrangement of at least one brake pad in a lining shaft opening of a brake caliper of a disc brake.

Generic disc brakes for motor vehicles, especially for commercial vehicles, have calipers, which are usually performed over two bearings against a brake carrier. Here, a first bearing, referred to as a fixed bearing, designed with relatively little play within a bearing bore in the brake carrier to ensure accurate guidance of the caliper. The second bearing, referred to as a floating bearing, has a larger clearance in order to compensate for tolerances and deformations of the respective caliper can.

The execution of the floating saddle bearing on two such bearings requires a relatively high standard of accuracy and robustness, which is associated with high processing and component costs. In newer disc brake systems, known for example from WO 2013/037876 A1, the brake carrier and the brake pads received in it are designed such that during a braking operation, the supporting forces are positioned both in discontinuously positioned carrier horns of the brake carrier and via a positive connection directly into the incoming Carrier horns are initiated. The initiation of the supporting forces takes place without detours via friction and reaction forces in the brake mechanism and the brake caliper bearing. As a result, a faster construction of the braking torque is achieved.

Object of the present invention is to develop a disc brake, a caliper and an arrangement of a brake pad in a lining shaft opening of a caliper of the generic type such that they are simple and inexpensive to produce while maintaining a fast braking torque build.

This object is achieved by a disc brake of a motor vehicle, in particular a commercial vehicle, with the features of claim 1 and by a caliper with the features of claim 17, a brake lining with the features of claim 18 and by an arrangement of at least one brake pad in a lining shaft opening a brake caliper of a disc brake with the features of claim 19 solved.

The disc brake according to the invention has a brake caliper which engages over a brake caliper and a brake carrier fixed in place on the vehicle side with carrier horns arranged on the inlet and outlet side. In the brake carrier at least one brake pad is received with a lining carrier plate and a friction lining. The inlet-side carrier horn and a guide surface of the lining carrier plate of the brake lining close thereto engage in a form-fitting manner radially with respect to a rotational axis of the brake disk. Between the caliper and the brake carrier designed as a bearing plain bearing is provided, whereby the caliper is axially displaceable relative to the axis of rotation of the brake disc relative to the brake carrier and pivotable about an axis of rotation of the brake disc parallel axis of rotation. On at least one of the brake pads and on the brake caliper corresponding locking means are arranged which prevent pivoting of the caliper about the axis of rotation of the fixed bearing in the mounted state.

With the locking means arranged on the at least one of the brake linings and on the brake caliper, a sliding guide of the caliper relative to the brake carrier as well as a relative to the axis of rotation of the brake caliper is provided by the functional interaction of the mutually corresponding locking means of the at least one brake pad on the one hand and the brake caliper Brake disc allows radial retention of the caliper relative to the brake carrier.

Due to the direct fixing of the caliper on the brake carrier on only the fixed bearing known in disc brakes from the prior art provided between second caliper and brake carrier designed as floating bearing plain bearing and thus the guide rail, the mounting screw, the bearing bush and optionally existing device for sealing Loslagers and also the processing of the brake carrier and the caliper with respect to the floating bearing eliminated.

Another advantage of the disc brake according to the invention is that the locking bearing replacing the floating bearing are partially disposed on the responsible for the brake caliper guide at least one brake pad corresponding to arranged on the brake caliper locking means, wherein the brake pad is designed as a wearing part, so that the demand for a fatigue life of the saddle guide is eliminated, since now this part of the brake caliper bearing (the brake pads or) is renewed with each pad change, which leads to a significant reduction in overall production and parts costs and the reduction of operating costs at the end customer.

Advantageous embodiments of the invention are the subject of the dependent claims.

According to an advantageous embodiment of the invention, a receptacle for holding a fixed to at least one brake pad locking element is integrally formed on the caliper. This receptacle is preferably formed as a bore on which the set of the lining carrier plate of the brake pad locking element can be fixed.

As a result, preferably as a straight rod or as a straight rod with at least one U-shaped bent end or as a retaining clip locking element formed in a simple manner to the brake caliper releasably secured, so that the caliper secured in operation against folding around the fixed bearing and for the brake pad change can be solved in a simple manner and unfolded.

For holding the locking element on the brake lining a retaining element is preferably provided on a radially remote from the axis of rotation of the brake disc end face of the lining carrier plate.

The support member is formed according to its preferred embodiment as a radially projecting tongue with the receiving bore for holding the locking element.

Such a support member can be attached in a simple manner by a simple modification to the respective brake pad, in particular its pad carrier plate. According to an alternative embodiment variant, the holding element is designed as an undercut for holding the locking element.

According to a further preferred embodiment of the invention, two brake pads are received in the brake carrier, which are each associated with opposing friction surfaces of the brake disc, wherein the locking element is held on only one of the brake pads. The holder of the locking element on only one of the brake pads is sufficient for the determination of the brake caliper with respect to the brake carrier, since even by the attachment of the locking element on one of the brake lining results in a radially outwardly directed positive connection.

According to an alternative embodiment, the locking element is fixed to both brake pads, which further increases stability. According to a further embodiment variant of the invention, a lining carrier plate is provided with a spring element which is supported on the inlet-side carrier horn. This makes it possible to dampen possible vibrations while driving.

The caliper according to the invention is characterized in that on the frame of the caliper, a receptacle for holding a fixed to at least one brake pad locking element is formed.

By the Anformung such a recording, it is possible to dispense with the necessary for a floating bearing machining the caliper. The formation of such a receptacle, in particular in the form of a perforation, is substantially less expensive and easier to perform on the caliper than the equipment of the caliper with a guide rail, the fastening screw, the bearing bush and the optionally existing device for sealing the movable bearing and the processing of the brake carrier and the caliper with respect to the floating bearing. Embodiments of the invention will be explained in more detail with reference to the accompanying drawings. Show it:

FIG. 1 shows a perspective view of a variant of a disc brake according to the invention,

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

Disc brake from another perspective,

Figure 3 is a perspective view of the disc brake of FIG

2 without attached caliper,

Figure 4 is a plan view of that shown in Figure 1 or 2

Brake disk, Figure 5 is a front view of a brake carrier with inserted brake pad, FIG. 6 shows a front view of a variant of a brake pad which can be used in the brake carrier with lateral guide surfaces, FIG. 7 shows a variant of a brake carrier of the brake disk,

Figures 8 - 10 different representations of various embodiments of a locking member for locking the caliper against the brake carrier and at least one of the brake pads and

1 1 is a sectional view of an embodiment of a fixed bearing of the disc brake,

In the following description of the figures, terms such as above, below, left, right, front, back, etc. refer exclusively to the exemplary representation and position of the brake disk, brake caliper, carrier horns, brake linings, locking element and the like chosen in the respective figures. These terms are not intended to be limiting, that is to say, by different working positions or the mirror-symmetrical design or the like, these references may change. FIGS. 1 and 2 show an alternative embodiment of a disc brake 1 according to the invention of a motor vehicle, in particular a utility vehicle.

The disc brake in this case has a on the brake disc 2 cross-caliper 4 and a vehicle fixedly fixed on the brake carrier 3 with inlet and outlet side arranged carrier horns 31, 32nd

In the brake carrier 3, at least one brake lining 5, 6, in the variant embodiment shown here, has two brake linings 5, 6, with respective lining carrier plates 53, 63 and friction linings 56, 66 fixed thereto. As can be seen in particular in Figures 2 and 3, there is a direct connection between the brake caliper 4 and the brake carrier 3 only via a fixed bearing 9. A variant of such a fixed bearing 9 is shown in Figure 1 1. As a fixed bearing 9 while a sliding bearing of the caliper 4 is referred to, in which a guide rail 93 axially to the rotational axis of the brake disc 2 is movably guided in a fixedly connected to the caliper 4 guide sleeve 91, so that an axial displacement of the caliper 4, based on the brake disc 2, relative to the stationary brake carrier 3 is possible. The guide rail 93 is screwed by a screw 92 to the brake carrier 3. In the direction of the action-side brake pad 5, the guide sleeve 91 is shielded from the interior of the disc brake by a bellows 95. The bellows 95 is fastened at one end to the guide spar 93 and a distal end to the caliper 4. A cover 94 prevents the entry of dirt to the bore of the guide spar 93, in which the screw 92 rests. A screw head 97 of the screw 92 presses in the screwed in the brake carrier 3 state against a step 96 in the bore of the guide spar 93rd

The fixed bearing 9 essentially assumes the function of a main guide of the caliper 4 to ensure a smooth displacement in a brake operation and a wear adjustment. Such designed as a bearing 9 plain bearing is, as shown in Figures 2 and 3, provided between the caliper 4 and the brake carrier 3, whereby the caliper 4 axially displaceable relative to the axis of rotation of the brake disc 2 against the brake carrier 3 and a to the axis of rotation A. the brake disc 2 parallel axis of rotation is pivotable.

Instead of the known from the prior art further direct connection between the brake caliper 4 and the brake carrier 3 by a designated as floating bearings further sliding bearing of the caliper 3, in which also a guide rail is guided axially movable axially to the axis of rotation of the brake disc 2 in an oval shaped sliding sleeve , which in particular serves to compensate for manufacturing tolerances, locking means 7, 10, 1 1, 41, 52, 62 are provided for further connection of the brake caliper 4 to the brake carrier 3. With this Verrieglungsmitteln a coupling of the caliper 3 is carried out with at least one of the brake pads 5, 6, which in turn is coupled to the brake carrier 3. Thus, on the lining carrier plates 51, 61 of the brake pads 5, 6 on a radially away from the axis of rotation A of the brake disc 2 end face of the lining carrier plates 53, 63 serving as Verrieglungsmittel holding means 52, 62 are provided with which serving as Verrieglungsmittel locking element 7 axially Rotary axis of the brake disc 2 slidably, but is held fixed radially to the axis of rotation of the brake disc 2.

By formed here as sheet metal pieces with respective holes holding means 52, 62 passes through the here formed as a rectilinear rod locking element 7 passes, as can be seen in Figure 2. The term rod here includes both a hollow rod and a rod made of solid material. The cross section of the rod can be round, oval or even polygonal.

The locking element 7 is provided in it, as further serving as a locking means 41 receptacles in the region of a frame 42 of the caliper 4 and thus creates a firm connection between the brake caliper 4 and the brake pads 5, 6th

The receptacles 41 are formed in the embodiment shown in Figure 2 as through holes. It is also conceivable to design the receptacles 41 on the application side or the reaction side of the caliper 4 as blind holes.

For the axial fixing of the locking element 7, one end of the locking element 7 may be provided with a thickening whose diameter is greater than the diameter of the receptacles 41 formed as passage openings.

It is also conceivable to provide the mounted in the state outwardly projecting ends of the locking element 7 with transverse bores in the respective pins or the like are inserted, so that the locking element 7 are secured axially after insertion of the split pins on the brake caliper 4. In order to prevent the brake caliper 4 from being unfolded during a braking operation and to permit a displacement of the brake linings 5, 6 in the application direction, as shown in FIG. 5, at least one of the brake linings 5, 6 is formed at least on the inlet side so that when installed, the inlet side Carrier horn 31 near guide surface 54, 64 of a projection 55, 65 of the lining carrier plate 53, 63 radially to a rotational axis A of the brake disc 2 positively against a contact surface 33 of a lateral recess 37 of the carrier horn 31. In the alternative embodiment variants shown in FIGS. 6 and 7, the brake linings 5, 6 as well as the inlet-side carrier horn 31 and the outfeed-side carrier horn 32 are shaped so that the lining carrier plates 53, 63 and the carrier horns 31, 32 engage in a form-fitting manner, resulting in a significantly increased guide length of the caliper results.

The brake pads 5, 6 are guided relative to the brake carrier 3 in the application direction of the disc brake or in the direction of the axis of rotation A of the brake disc 2 slidably in a lining shaft of the caliper 4 between the inlet-side carrier horns 31 and the outlet-side carrier horns 32 of the brake carrier 3. While the reaction-side brake pad 6 is fixed to the brake caliper 3 in the application direction, the application-side brake pad 5 is also displaceable relative to the caliper 3 in the direction of the axis of rotation A of the brake disc 2. Due to the mounting of the caliper 4 on the one hand on the fixed bearing 9 and on the other hand via the at least one locking element 7 on at least one of the brake pads 5, 6 and the positive engagement of the respective brake pad 5, 6 with the inlet side carrier horn 31 of the brake carrier 3 is a folding of the caliper 4th effectively prevented.

As an alternative to the rod-shaped locking elements 7 shown in FIGS. 1 to 3, other embodiments of such a locking element are also conceivable. Thus, the locking element 10 shown in Figure 8 is designed as a straight rod with at least one U-shaped bent end 101, the free end 102 is received in the receptacle 41 of the caliper 4. The receptacle 41 accommodating the free end of the U-shaped end 101 is thereby preferably formed ear-shaped on the frame 42 of the caliper 4, wherein the end of the locking element 10 penetrates a central recess of the ear-shaped recording. The receptacle on the front side of the lining carrier plate 63, 53 of the brake lining 6, 5 is preferably formed as an undercut 65.

As can be seen in Figure 8, the locking element 10 engages over both brake pads 5, 6, which rest on opposite friction surfaces of the brake disc 2 in a braking operation, wherein the free end of the rectilinear portion 103 of the locking element 10 in the receptacle 41 in the brake caliper rests.

In another preferred embodiment, shown in Figure 9, the locking element 1 1 is designed as a retaining clip. In this case, one end 102 of the retaining clip is fixed by means of a first retaining pin 12 in the receptacle 41 of the caliper 4. The other end of the retaining clip is fixed by means of a second retaining pin 13 on the lining carrier plate 63 of the brake lining 6. Also conceivable are other fastening possibilities of the retaining clip on the brake caliper or the lining carrier plate 5, 6.

As can be clearly seen in FIG. 9, the locking element 11 is fixed to exactly one of the brake linings 5, 6, which is sufficient for fixing the brake caliper 4 with respect to the brake carrier 3 in order to unfold the caliper 4 from its functional position on the brake carrier 3 to prevent.

FIG. 10 once again shows the embodiment variant of the connecting element 11 shown in FIG. 9 as a clamp in a plan view, in which the clamp engages behind the retaining bolt 12 with one end.

As shown in FIGS. 1 and 3, a spring element 8 supported on the inlet-side carrier horn 32 is preferably arranged on the lining carrier plate 53, 63 for damping vibrations occurring during travel. As a result, moreover, rattling of the brake pad, which bears against the contact surface 33 in the lining shaft of the brake carrier 3 with little play, can be prevented.

Reference list disc brake

Brake disc brake carrier

carrier Horn

contact surface

supporting

drilling

Recess caliper

Recordings

frame

Cover shaft opening brake pad

lining spring

holding means

Backing plate

guide surface

head Start

Friction lining brake lining

Pad backing plates

holding means

Backing plate

guide surface

undercut

friction lining 7 Vemegelungselement 8 spring element

9 fixed storage

91 Guide sleeve 92 Screw

93 guide rail

94 cover

95 bellows

96 step

97 Screw head 10 Locking element 101 End

102 free end

03 straight part

1 1 locking element 12 first retaining pin 13 second retaining bolt

A rotation axis

Claims

claims

Disc brake of a motor vehicle, in particular a utility vehicle, comprising

- a brake disc (2) cross-caliper (4),

a brake carrier (3) which can be fixed fixed on the vehicle side with carrier horns (31, 32) arranged on the inlet and outlet sides,

at least one brake pad (5, 6) received in the brake carrier (3) with a lining carrier plate (53, 63) and a friction lining (52, 62),

- Wherein the inlet-side carrier horn (31) and a guide surface (54, 64) close to the lining carrier plate (53, 63) engage in a form-fitting manner radially to a rotation axis (A) of the brake disk (2)

- Wherein between the caliper (4) and the brake carrier (3) as a fixed bearing (9) designed sliding bearing is provided,

whereby the brake caliper (4) is guided axially displaceable relative to the brake carrier (3) to the axis of rotation of the brake disc (2) and pivotable about an axis of rotation parallel to the axis of rotation (A) of the brake disc (2),

characterized in that

- On at least one of the brake pads (5, 6) and on the brake caliper (4) mutually corresponding first and second locking means (7, 10, 1 1, 41, 52, 62) are arranged, in the mounted state pivoting of the caliper ( 4) to prevent the axis of rotation of the fixed bearing (9).

2. Disc brake according to claim 1, characterized in that a first locking means as on at least one of the Bremsbelä- ge (5, 6) arranged support member is formed and second

Locking means as at least one locking element (7, 10, 1 1) and at least one on the caliper (4) arranged, in particular integrally formed receptacle (41) for holding the at least one locking element (7, 10, 1 1), wherein in the receptacle (41) held locking element (7, 10, 1 1) on the support member of Brake pad is held so that the brake caliper (4) via the corresponding first and second locking means (7, 10, 1 1, 41, 52, 62) radially to the axis of rotation (A) of the brake disc (2) form-fitting with the at least one of Brake pads (5, 6) is connected.

3. Disc brake according to claim 2, characterized in that on at least one of the brake pads (5, 6) two mutually parallel locking elements (7, 10, 1 1) are arranged.

4. Disc brake according to claim 2 or 3, characterized in that the receptacle (41) is formed as a bore in which on the lining carrier plate (53, 63) of the brake lining (5, 6) held locking element (7, 10, 1 1 ) is determinable.

5. Disc brake according to one of claims 2 to 4, characterized in that the support member for holding the locking element (7, 10, 1 1) on a radially from the axis of rotation (A) of the brake disc (2) facing away from the end face of the lining carrier plate (53, 63) is provided.

6. Disc brake according to claim 5, characterized in that the holding element as a radially projecting tongue (52, 62) with a receiving bore for axially to the axis of rotation of the brake disc (2) displaceable mounting of the locking element (7, 10, 1 1) is formed.

7. Disc brake according to claim 5, characterized in that the holding element as an undercut (65) for holding the locking element (7, 10, 1 1) is formed.

8. Disc brake according to one of the preceding claims, characterized in that the fixed bearing (9) on the brake carrier (3) or the caliper (4) fixed guide rail (93) and one on the corresponding caliper (4) or the brake carrier (3 ) provided receptacle (35) with a guide bush (91), wherein the guide rail (93) in the guide bush (91) axially displaceable axially to the rotational axis of the brake disc (2).

9. Disc brake according to one of claims 2 to 8, characterized in that in the brake carrier (3) has two opposite friction surfaces of the brake disc (2) associated brake pads (5, 6) are accommodated, wherein the locking element (7, 10, 1 1) at exactly one of the brake pads (5, 6) is fixed.

10. Disc brake according to one of claims 2 to 8, characterized in that in the brake carrier (3) has two opposite friction surfaces of the brake disc (2) associated brake pads (5, 6) are accommodated, wherein the locking element (7, 10, 1 1) is fixed to both brake pads (5, 6).

1 1. Disc brake according to one of claims 2 to 10, characterized in that the locking element (7) is designed as a rectilinear rod, on the one hand in the at least one receptacle (41), preferably in two receptacles (41) of the caliper (4) and on or in the support member at least one of the brake pads (5, 6) is held.

12. Disc brake according to one of claims 2 to 10, characterized in that the locking element (10) is designed as a straight rod with at least one U-shaped bent end (101), wherein on the one hand the ends of the locking element (10) in respective receptacles (41) of the caliper (4) are received and on the other a central region of the locking element (10) on or in the support member of at least one of the brake pads (5, 6) is held.

13. Disc brake according to claim 1 1 or 12, characterized in that the locking element (7, 10) axially to the axis of rotation (A) of the brake disc (2) is slidably held on the at least one of the brake pads (5, 6).

14. Disc brake according to one of claims 3 to 10, characterized in that the locking element (1 1) as Halteklam- mer is formed, one end (102) by means of a first retaining pin (12) in the receptacle (41) of the caliper (4) and the other end by means of a second retaining pin (13) on the lining carrier plate (53, 63) is fixed.

15. Disc brake according to one of the preceding claims,

characterized in that the outlet-side carrier horn (32) and a guide surface (54, 64) of the lining carrier plate (53, 63) engage in a form-fitting manner radially with respect to a rotation axis (A) of the brake disk (2).

16. Disc brake according to one of the preceding claims,

characterized in that on the lining carrier plate (53, 63) on the inlet side carrier horn (32) supporting spring element (8) is arranged.

17. Brake caliper (4) of a disc brake, with a bore for receiving a sliding sleeve of a bearing (9) designed plain bearing for slidable mounting on a brake carrier (3) and a lining shaft opening (43) surrounding frame (42), characterized in that on the frame (42) of the caliper (4) at least one receptacle (41) for holding a at least one brake pad (5, 6) at least radially fixed locking element (7, 10, 1 1) is integrally formed.

18. brake pad (5,6) of a disc brake, with a lining carrier plate (53, 63) and one on the lining carrier plate (53, 63) fixed friction lining (56, 66), wherein from an inlet side edge of the lining carrier plate (53, 63) itself a projection (55) which, in the mounted state of the brake lining, projects into a lateral recess (37) of an inlet-side carrier horn (31) of a brake carrier (3), characterized by a first locking means (52, 62) for receiving one on a caliper ( 4) and corresponding to the first locking means (52, 62) second locking means (7, 10, 1 1, 41) for preventing pivoting of the caliper (4) about the axis of rotation of one between the caliper (4) and the brake carrier (3) arranged fixed bearing (9).

19. Arrangement of at least one brake lining (5, 6) in a covering shaft opening (43) of a brake caliper (4) of a disc brake, wherein between the caliper (4) and the brake carrier (3) a bearing (9) designed sliding bearing is provided and the Characterized in that on the frame (42) of the caliper (4) at least one receptacle (41) for holding a on the at least one brake pad (5, 6 ) at least radially fixed locking element (7, 10, 1 1) is formed, with the brake caliper (4) radially to a rotational axis of the brake caliper (4) partially enclosed brake disc (2) positively with the at least one brake pad (5, 6 ) connected is.