Disc brake for a commercial vehicle

Abstract

A disc brake for commercial vehicle includes a brake caliper and brake pads for clamping the brake disc. The brake caliper has a first inside space with an opening on a side facing the brake disc for receiving a clamping device, and the brake caliper has a second inside space for receiving the brake disc. The brake caliper and brake pads have advantages in terms of installation space and is lightweight and reduces production costs. The brake caliper includes clamping-side lugs and reaction-side lugs. The lugs on each side define a channel for receiving the brake pads for each side. The brake pads include supporting surfaces and bearing surfaces on their perimeter that correspond to the arrangement of the lugs. The lugs on the clamping side define an L-shape. The axial length of supporting surfaces of the clamping side brake pad is shorter than that of the clamping-side lugs.

Claims

1. A disc brake (1) for vehicles, the disc brake comprising: a brake caliper (2), a clamping-side brake pad (3), and a reaction-side brake pad (3a) for clamping a brake disc (6) in a direction along an axial axis (A), wherein the brake caliper is a sliding brake caliper, wherein the brake caliper position relative to the brake disc shifts in response to brake pad wear; wherein the brake caliper (2) defines a first inside space (4) for receiving a clamping device (7), the first inside space (4) having an opening (5) on a side facing the brake disc (6), wherein the brake caliper (2) defines a second inside space (8) for receiving the brake disc (6), wherein the brake caliper (2) includes, in the second inside space (8), clamping-side lugs (9, 9a) on opposite sides of the second inside space for receiving the clamping-side brake pad (3) and reaction-side lugs (9b, 9bb, 9c, 9cc) on opposite sides of the second inside space for receiving the reaction-side brake pad (3a); wherein the second inside space is open at the top and bottom thereof, wherein the brake caliper is free from structure extending axially across the top of the second inside space, such that the top of the second inside space is defined by an outer perimeter when viewed vertically, wherein the brake pads are insertable vertically through the outer perimeter; wherein at least a bottom portion of the clamping-side lugs (9, 9a) are disposed below a bottom-most edge of a backing plate of a clamping side brake pad and supports the bottom-most edge when the clamping side brake pad is inserted in the second inside space; wherein at least two reaction-side lugs are lower reaction-side lugs disposed below a bottom-most edge of a backing plate of a reaction side brake pad and support the reaction side brake pad when the reaction side brake pad is inserted in the second inside space; wherein the lower reaction side lugs are on opposite lateral sides of the axial axis (A) and a pair of upper reaction-side lugs are disposed on opposite lateral sides of the axial axis (A); wherein the lower reaction-side lugs are spaced apart laterally, and the upper reaction side lugs are disposed laterally outward relative to the lower reaction side lugs such that the pair of lower reaction side lugs are laterally between the pair of upper reaction-side lugs; wherein the upper reaction-side lugs support the reaction-side brake pad (3a) in a lateral direction of the disc brake (1) and the lower reaction-side lugs (9bb, 9cc) support the reaction side brake pad (3a) in a vertical direction of the disc brake (1), wherein the lower reaction-side lugs are disposed below a lower edge surface of the reaction-side brake pad and support a laterally outermost section of the lower edge surface of the reaction-side brake pad, wherein the reaction-side brake pad includes notches defined in upper corners on opposite lateral sides of the disc brake, wherein the upper reaction-side lugs are disposed in the notches and above the notches.

2. The disc brake (1) as claimed in claim 1, wherein the clamping-side lugs (9, 9a) are arranged opposite one another and form a clamping-side pad carrier channel (10) between side portions of the clamping side lugs for receiving the clamping-side brake pad (3), and wherein at least two of the reaction-side lugs (9b, 9bb, 9c, 9cc) are arranged opposite one another and form a reaction-side pad carrier channel (10a) for receiving the reaction-side brake pad (3a).

3. The disc brake (1) as claimed in claim 1, wherein the brake caliper (2) has first and second axial cross-members (11, 11a), and two sub-regions (12, 12a) of the first axial cross-member (11) located in the area of the second inside space (8) include one of the clamping side lugs and one of the reaction side lugs (9a, 9c) and two sub-regions (12b, 12c) of the second axial cross-member (11a) located in the area of the second inside space (8) include one of the clamping side lugs and one of the reaction side lugs (9, 9b), wherein each of the clamping side lugs and the reaction side lugs disposed in the two sub-regions of each of the first and second axial cross-members are disposed below an uppermost surface of the corresponding sub-regions.

4. The disc brake (1) as claimed in claim 2, wherein the clamping side lugs (9, 9a) are L-shaped and include the bottom portion extending inwardly relative to a side portion.

5. The disc brake (1) as claimed in claim 1, wherein the brake caliper (2) and the lugs (9, 9a; 9b, 9bb, 9c, 9cc) are formed from one component.

6. The disc brake (1) as claimed in claim 5, wherein the component is a cast part, an aluminum component, or a component formed from a composite material.

7. The disc brake (1) as claimed in claim 1, wherein the first inside space (4) is configured to receive an axially arranged clamping device (7).

8. The disc brake as claimed in claim 1, wherein the clamping-side brake pad (3) has, on a perimeter thereof, supporting surfaces (13, 13a) and bearing surfaces (21, 21a) for arrangement on the clamping-side lugs (9, 9a), and wherein the reaction-side brake pad (3a) has, on a perimeter thereof, supporting surfaces (13b, 13c) and bearing surfaces (21b, 21c) for arrangement on the reaction-side lugs (9b, 9bb, 9c, 9cc); wherein the bottom portion of the clamping side lugs are disposed below and support the bearing surfaces of the clamping side brake pad and the at least two reaction side lugs are disposed below and support the bearing surfaces of the reaction-side brake pad.

9. The disc brake (1) as claimed in claim 8, wherein the supporting surfaces (13, 13a) of the clamping-side brake pad (3) lie vertically and perpendicularly to the axial axis (A) on the clamping-side lugs (9, 9a) and the bearing surfaces (21, 21a) of the clamping side brake pad (3) lie horizontally on the clamping side lugs (9, 9a), and wherein the supporting surfaces (13b, 13c) of the reaction-side brake pads (3a) lie vertically and perpendicularly to the axial axis (A) on the reaction-side lugs (9b, 9c) and wherein the bearing surfaces (21b, 21c) of the clamping-side brake pad (3a) lie horizontally on the reaction-side lugs (9b, 9bb, 9c, 9cc).

10. The disc brake (1) as claimed in claim 8, wherein an axial length (Lx) of the supporting surfaces (13, 13a) of the clamping-side brake pad (3) is smaller than an axial length (Ly) of the clamping-side lugs (9, 9a).

11. The disc brake (1) as claimed in claim 10, wherein the axial length (Ly) of the clamping-side lugs (9, 9a) is defined by the sum of the axial length (Lx) of the supporting surfaces (13, 13a) of the clamping-side brake pad (3), a degree of wear (X) of the reaction-side brake pad (3a) and a degree of wear (Y) of the brake disc (6).

12. The disc brake (1) as claimed in claim 1, wherein the brake caliper (2) includes a bolt guide (15, 15a) having a bolt guide cap (18, 18a) arranged coaxially on the bolt guide (15, 15a) of the brake caliper (2).

13. The disc brake (1) as claimed in claim 12, wherein the bolt guide cap (18, 18a) is fastened to the bolt guide (15, 15a) via a screw connection or a clip connection.

14. A disc brake (1) for vehicles, the disc brake comprising: a brake caliper (2), a clamping-side brake pad (3), and a reaction-side brake pad (3a) for clamping a brake disc (6) in a direction along an axial axis (A), wherein the brake caliper is a sliding brake caliper, wherein the brake caliper position relative to the brake disc shifts in response to brake pad wear; wherein the brake caliper (2) defines a first inside space (4) for receiving a clamping device (7), the first inside space (4) having an opening (5) on a side facing the brake disc (6), wherein the brake caliper (2) defines a second inside space (8) for receiving the brake disc (6), wherein the brake caliper (2) includes, in the second inside space (8), clamping-side lugs (9, 9a) on opposite sides of the second inside space for receiving the clamping-side brake pad (3) and reaction-side lugs (9b, 9bb, 9c, 9cc) on opposite sides of the second inside space for receiving the reaction-side brake pad (3a); wherein the second inside space is open at the top and bottom thereof, wherein the brake caliper is free from structure extending axially across the top of the second inside space, such that the top of the second inside space is defined by an outer perimeter when viewed vertically, wherein the brake pads are insertable vertically through the outer perimeter; wherein at least a bottom portion of the clamping-side lugs (9, 9a) are disposed below a bottom-most edge of a backing plate of a clamping side brake pad and supports the bottom-most edge when the clamping side brake pad is inserted in the second inside space; wherein at least two reaction-side lugs are disposed below a bottom-most edge of a backing plate of a reaction side brake pad and support the reaction side brake pad when the reaction side brake pad is inserted in the second inside space wherein the reaction side lugs (9b, 9c, 9bb, 9cc) include a pair of first reaction-side lugs (9b, 9c) on opposite lateral sides of the axial axis (A) and a pair of second reaction-side lugs (9bb, 9cc) on opposite lateral sides of the axial axis (A), wherein the first reaction-side lugs are upper reaction side lugs and the second reaction-side lugs are lower reaction side lugs; wherein the lower reaction-side lugs are spaced apart laterally, and the upper reaction side lugs are disposed laterally outward relative to the lower reaction side lugs such that the pair of lower reaction side lugs are laterally between the pair of upper reaction-side lugs; wherein the upper reaction-side lugs support the reaction-side brake pad (3a) in a lateral direction of the disc brake (1) and the lower reaction-side lugs (9bb, 9cc) support the reaction side brake pad (3a) in a vertical direction of the disc brake (1), wherein the lower reaction-side lugs are disposed below a lower edge surface of the reaction-side brake pad and support a laterally outermost section of the lower edge surface of the reaction-side brake pad, wherein the reaction-side brake pad includes notches defined in upper corners on opposite lateral sides of the disc brake, wherein the upper reaction-side lugs are disposed in the notches and above the notches.

15. The disc brake (1) as claimed in claim 14, wherein the first and second reaction side lugs (9b, 9bb) on a first lateral side of the axial axis (A) support a first lateral side of the reaction-side brake pad (3a) and the first and second reaction side lugs (9c, 9cc) on a second lateral side of the axial axis (A) support a second lateral side of the reaction-side brake pad (3a).

16. The disc brake (1) as claimed in claim 14, wherein the first reaction side lugs (9b, 9c) are arranged at a transverse angle relative to the second reaction-side lugs.

17. The disc brake (1) as claimed in claim 16, wherein the transverse angle is a 90 degree angle.

18. The disc brake (1) as claimed in claim 16, wherein the transverse angle matches an angle as measured between a bearing surface (21b, 21c) and a support surface (13b, 13c) of the reaction-side brake pad.

19. The disc brake (1) as claimed in claim 14, wherein the first reaction-side lugs (9b, 9c) and the second reaction-side lugs (9bb, 9cc) combine to define a pair of L-shapes.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Selected exemplary embodiments of the invention will be explained herein below by way of the accompanying figures, in which:

(2) FIG. 1 is a perspective view of a disc brake having a brake caliper with lugs,

(3) FIG. 2 is a perspective view of a clamping-side brake pad of the brake caliper according to FIG. 1,

(4) FIG. 2a is a perspective view of a reaction-side brake pad of the brake caliper according to FIG. 1,

(5) FIG. 3 is a perspective view of the brake caliper of the disc brake according to FIG. 1,

(6) FIG. 3a is another perspective view of the brake caliper of the disc brake according to FIG. 1,

(7) FIG. 3b is yet another perspective view of the brake caliper of the disc brake according to FIG. 1,

(8) FIG. 4 is another perspective view of the disc brake according to FIG. 1 having the brake caliper according to FIGS. 1 and 3, 3a, 3b.

DETAILED DESCRIPTION OF THE DRAWINGS

(9) FIG. 1 shows a disc brake having a brake caliper 2, according to the present disclosure. In the brake caliper 2, starting from an axial axis A of the brake caliper 2 on the clamping side, a recess in the form of a first inside space 4 is disposed for receiving a clamping device 7 that is arranged axially in succession. The clamping device 7 clamps a brake disc 6 via the clamping-side brake pad 3, the reaction-side brake pad 3a, and via an opening 5 that extends axially in the direction of the brake disc 6 and that is provided in the first inside space 4. For receiving a clamping-side brake pad 3 and a reaction-side brake pad 3a, and a brake disc 6 arranged between the clamping-side brake pad 3 and the reaction-side brake pad 3a, the brake caliper 2 has a second inside space 8. In the direction of the second inside space 8 of the brake caliper 2, sub-regions 12, 12a are formed on a first axial cross-member 11 and sub-regions 12b, 12c are formed on a second axial cross-member 11a.

(10) Lugs 9, 9a, 9b, 9bb, 9c, 9cc are formed from the sub-regions, where the lug 9bb and the lug 9cc are shown in FIG. 3. The lugs 9, 9a are L-shaped and disposed on opposite lateral sides of the axis A, and the lugs 9, 9a form a pad carrier channel 10 in the lateral space therebetween for receiving the brake pad 3. Lugs 9b, 9c are also disposed on opposite lateral sides, and the lugs 9b, 9c form a pad carrier channel 10a in the lateral space therebetween for receiving the brake pad 3a. The lugs 9, 9a have axially a length Ly in the axial direction, which corresponds to a combination of an axial length L of the brake pad 3 and a pad wear X of the reaction-side brake pad 3a. A pad wear X (see FIG. 2a) is to be understood as meaning the deterioration of a friction lining 20 of the reaction-side brake pad 3a. By lengthening of the lugs 9, 9a (relative to the length L of the brake pad 3) by the pad wear X of the brake pad 3a, the displacement of the brake caliper 2, and accordingly also the displacement of the brake pad 3, in the direction of the brake disc 6 is taken into consideration, whereby the clamping-side brake pad 3 is prevented from falling out of the brake caliper 2.

(11) The brake caliper 2 additionally has two bolt guides 15, 15a, which are described in greater detail in FIG. 4. A degree of wear Y of the brake disc 6 is described in greater detail in FIG. 2, 2a.

(12) A detailed view of the clamping-side brake pad 3 and of the reaction-side brake pad 3a is shown in FIG. 2 and FIG. 2a, respectively. The brake pad 3 has, on its perimeter, supporting surfaces 13, 13a and bearing surfaces 21, 21a, where the supporting surfaces 13, 13a are in contact perpendicularly (i.e. laterally) to the axial axis A of the brake caliper 2 (FIG. 1) with the lugs 9, 9a of the brake caliper (FIG. 1), and the bearing surfaces 21, 21a, are in contact radially (i.e. vertically) with the lugs 9, 9a (FIG. 1). Similarly, the brake pad 3a has, on its perimeter, supporting surfaces 13b, 13c and bearing surfaces 21b, 21c, wherein the supporting surfaces 13b, 13c are in contact perpendicularly (i.e. laterally) to the axial axis A of the brake caliper 2 (FIG. 1) with the lugs 9b, 9c of the brake caliper (FIG. 1) and the bearing surfaces 21b, 21c are in contact radially (i.e. vertically) with the lugs 9bb, 9cc (FIGS. 3 and 3b). The clamping-side brake pad 3 differs from the reaction-side brake pad 3a by the dimensioning of the bearing surfaces 21, 21a, 21b, 21c and of the supporting surfaces 13, 13a, 13b, 13c. By precisely positioning and arranging the brake pads 3, 3a on the lugs 9, 9a, 9b, 9c, 9bb, 9cc the brake pads 3, 3a are prevented from both canting and falling out of the brake caliper 2.

(13) In the case of the clamping-side brake pad 3, the axial length Lx of the supporting surfaces 13, 13a is smaller than the axial length Ly of the lugs 9, 9a (FIG. 1). The axial length Ly of the lugs 9, 9a is composed of the axial length Lx of the supporting surfaces 13, 13a, the degree of wear X of the reaction-side brake pad 3a and the degree of wear Y (FIG. 1) of the brake disc 6. An axial length Lz of the bearing surface 21, 21a corresponds to the axial length Ly of the lugs 9, 9a (FIG. 1). In the case of the reaction-side brake pad 3a, an axial length Lx.sub.1 of the supporting surfaces 13b, 13c corresponds to the axial length Ly.sub.1 of the lugs 9b, 9c (FIG. 1), and an axial length Lz.sub.1 of the bearing surface 21b, 21c corresponds to the axial length Ly.sub.1 of the lugs 9bb, 9cc (FIG. 1).

(14) FIG. 3, 3a, 3b show three views of the brake caliper 2 of the disc brake 1 according to FIG. 1 to FIG. 2a, but without brake pads 3, 3a. In particular, the L-shaped form of the clamping-side lugs 9, 9a is shown.

(15) Furthermore, the axial lengthening of the clamping side lugs 9, 9a, as compared to the reaction-side lugs 9b, 9bb, 9c, 9cc, by the pad wear X of the brake pad 3a (FIG. 1, FIG. 2, FIG. 2a) can be seen particularly clearly.

(16) In FIG. 4, the arrangement of the bolt guide cap 18 of the bolt guide 15 and the arrangement of the bolt guide cap 18a of the bolt guide 15a is shown. The bolt guide cap 18 is screwed to the bolt guide 15, axially in the direction of the clamping device 7, via a thread 22 of the bolt guide 15, and the further bolt guide cap 18a is screwed to the bolt guide 15a, axially in the direction of the clamping device 7, via a thread 22a of the bolt guide 15a. For illustrative purposes, a bolt screw 16 for connection to a vehicle axle, not shown, is shown in the bolt guide 15a. For mounting of the disc brake 1 on the vehicle axle, not shown, the bolt screw 16 is screwed out of the bolt guide 15a once the bolt guide cap 18a has been unscrewed from the bolt guide 15. The bolt screw 16 is then screwed into the bolt guide 15 again.

(17) While the above description constitutes the preferred embodiments of the present invention, it will be appreciated that the invention is susceptible to modification, variation and change without departing from the proper scope and fair meaning of the accompanying claims.