DISC BRAKE FOR VEHICLES, IN PARTICULAR FOR COMMERCIAL VEHICLES

Abstract

A disc brake (1) for vehicles, in particular for commercial vehicles, includes a brake disc, at least two brake linings (3, 3a), and an adjusting spindle (4) axially adjustable toward the brake linings (3, 3a) for setting an air play (L) between the brake linings (3, 3a) and the brake disc (2). The adjusting spindle (4) has a pressure plate (4a) on a side facing the brake linings (3, 3a), and a pressure piece (9) arranged on the adjusting spindle (4) on a side axially opposite from the brake linings (3, 3a). The pressure piece (9) has an anti-rotation safeguard (10; 10a) for blocking a rotation (R) of the adjusting spindle (4), and the anti-rotation safeguard (10; 10a) axially engages the adjusting spindle (4).

Claims

1. A disc brake (1) for vehicles, comprising: a brake disc (2), at least two brake linings (3, 3a), an adjusting spindle (4) axially adjustable toward the brake linings (3, 3a) for setting an air play (L) between the brake linings (3, 3a) and the brake disc (2), the adjusting spindle (4) having: a pressure plate (4a) arranged on the adjusting spindle (4) on a side facing the brake linings (3, 3a), and a pressure piece (9) arranged on the adjusting spindle (4) on a side axially opposite from the brake linings (3, 3a), wherein the pressure piece (9) has an anti-rotation safeguard (10; 10a) for blocking a rotation (R) of the adjusting spindle (4), and the anti-rotation safeguard (10; 10a) axially engages the adjusting spindle (4).

2. The disc brake (1) according to claim 1, wherein the anti-rotation safeguard (10) comprises a fixing element (6; 6a), with an opening (7; 7a), and a connecting element (11; 11a) configured to engage the opening (7; 7a) of the fixing element (6; 6a).

3. The disc brake (1) according to claim 2, wherein the connecting element (11) is connected in a positively locking manner to the pressure piece (9).

4. The disc brake (1) according to claim 2, wherein, axially in the direction of the adjusting spindle (4), the pressure piece (9) has a guide (12) of T-shaped configuration for receiving the connecting element (11).

5. The disc brake (1) according to claim 2, wherein the connecting element (11) is of plate-shaped configuration and, axially in the direction of the pressure piece (9), has lugs (8, 8a) for fixing the connecting element (11) in the guide (12) of T-shaped configuration.

6. The disc brake (1) according to claim 5, wherein at least one lug (8, 8a) can be deformed horizontally, in relation to the axial axis (A).

7. The disc brake (1) according to claim 2, wherein the connecting element (11a) and the pressure piece (9) are configured as one structural unit.

8. The disc brake (1) according to claim 2, wherein the connecting element (11; 11a) has a rectangular, square or hexagonal cross-section.

9. The disc brake (1) according to claim 2, wherein the fixing element (6) is arranged in a positively locking manner in a groove (5) of the adjusting spindle (4), axially opposite from the pressure plate (4a).

10. The disc brake (1) according to claim 2, wherein the fixing element (6) is a plate (6) made of a metal material or a plastic.

11. The disc brake (1) according to claim 2, wherein the fixing element (6a) is arranged on the adjusting spindle (4) axially opposite from the pressure plate (4a), the fixing element (6a) and the adjusting spindle (4) being configured as one structural unit.

12. The disc brake (1) according to claim 11, wherein the adjusting spindle (4) has a bore (13) along an axial axis (A), and the bore (13) complements the connecting element (11a) in length and shape.

13. The disc brake (1) according to claim 2, wherein the opening (7; 7a) of the fixing element (6; 6a) complements the connecting element (11; 11a) in shape.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the drawings:

[0021] FIG. 1 shows a disc brake having an anti-rotation safeguard of the adjusting spindle, in a laterally sectioned view,

[0022] FIG. 2 shows a disc brake according to FIG. 1 as an exploded drawing,

[0023] FIG. 2a shows a disc brake according to FIGS. 1 and 2 in an overall illustration,

[0024] FIG. 3 shows a disc brake having an alternative anti-rotation safeguard of the adjusting spindle in a laterally sectioned view,

[0025] FIG. 4 shows a disc brake according to FIG. 3 as an exploded drawing, and

[0026] FIG. 4a shows a disc brake according to FIGS. 3 and 4 in an overall illustration.

DETAILED DESCRIPTION OF THE DRAWINGS

[0027] FIG. 1 shows a diagrammatically illustrated disc brake 1 having an anti-rotation safeguard 10 (shown in detail) of an adjusting spindle 4 and having a pressure plate 4a. In order to set an air play L between a brake lining 3, 3a and a brake disc 2, an adjustment of the adjusting spindle 4 along an axial axis A of the adjusting spindle 4 is required, in the direction of the brake linings 3, 3a. The adjusting spindle 4 is adjusted axially in the direction of the brake linings via a pressure piece 9 which lies opposite the pressure plate 4a and is arranged on the adjusting spindle, the air play L being set to a predefined magnitude. In order to avoid a simultaneous rotation R of the adjusting spindle 4 about the axial axis A, the anti-rotation safeguard 10 is arranged within the adjusting spindle 4 and within the pressure piece 9. In order to arrange the anti-rotation safeguard 10 within the adjusting spindle 4, the adjusting spindle 4 has an interior space 16 and a groove 5 which is shaped in a side wall 17. The groove 5 is arranged on that side of the side wall 17 which faces the interior space 16. In addition, the groove 5 is arranged at that axial end of the adjusting spindle 4 which lies opposite the pressure plate 4a. The anti-rotation safeguard 10 is configured from two individual components, namely a connecting element 11 and a fixing element 6. The fixing element 6 is a disc-shaped plate 6 having an opening 7 which is configured centrally in the plate 6. The plate 6 is arranged axially in the groove 5, and is supported axially on a supporting wall 5a of the groove 5 and radially on a side wall 5b of the groove 5. The plate 6 is therefore connected in a positively locking manner to the groove 5 of the adjusting spindle 4. The connecting element 11 which is configured as a plate strip 11 protrudes axially through the opening 7, the plate strip 11 being a punched metal part. The plate strip 11 has an axial length LV. The axial length LV of the plate strip 11 corresponds to an axial length LV, starting from the radially oriented head of the guide 12 of T-shaped configuration as far as the transition of the adjusting spindle 4 to the pressure plate 4a. The plate strip 11 is guided in the pressure piece 9 in a guide 12 of T-shaped configuration. Lugs 8, 8a are arranged on the plate strip 11 axially in the direction of the pressure piece 9.

[0028] During assembly, the plate strip 11 is guided axially by way of the guide 12 of T-shaped configuration, in the direction of the adjusting spindle 4. In order to secure the plate strip 11 against an axial movement, the lug 8a is deformed horizontally in the direction of a horizontal axis AH, in relation to the axial axis A. The lug 8a which is configured as a hook is supported axially on the pressure piece 9.

[0029] The opening 7 of the fixing element has the same rectangular shape as the plate strip, and secures the adjusting spindle 4 against a rotation about the axial axis A. The pressure piece 9 and the adjusting spindle 4 are not in contact with one another. The non-positive connection is transmitted via the pressure piece 9 to an adjusting nut (not shown) and via the thread of the adjusting spindle 4 to the adjusting spindle 4. The plate 6 and the pressure piece 9 are not in contact with one another.

[0030] FIG. 2 shows the adjusting spindle 4, the pressure piece 9 and the anti-rotation safeguard 10 according to FIG. 1 as an exploded drawing. The pressure piece 9, the adjusting spindle 4 with the pressure plate 4a, and the fixing element 6 which is configured as a disc-shaped plate 6 are shown in a laterally sectioned view. The disc-like shape of the plate 6 and the opening 7 of rectangular configuration of the plate 6 can be seen particularly clearly. In addition, the horizontally deformable lugs 8, 8a are shown.

[0031] FIG. 2a once again shows the adjusting spindle 4, the pressure piece 9 and the anti-rotation safeguard 10 according to FIG. 1 and FIG. 2 in a non-sectioned illustration.

[0032] FIG. 3 shows a disc brake 1 according to FIG. 1 with an alternative embodiment of the anti-rotation safeguard 10a, and FIG. 4 shows an alternative anti-rotation safeguard according to FIG. 3 in detail. Here, FIG. 3 shows the alternative embodiment of the anti-rotation safeguard 10a in the assembled state, and FIG. 4 shows the alternative anti-rotation safeguard 10a in the dismantled state. In the alternative embodiment, a connecting element 11a and the pressure piece 9 are formed from a sintered component. The connecting element 11a is formed hexagonally, the connecting element 11a being guided in a bore 13 of the adjusting spindle 4. Moreover, the fixing element 6a and the adjusting spindle 4 are formed from a cold-worked part. A groove 5 for receiving the fixing element 6a (as is the case in FIG. 1 and FIG. 2) is not provided in the alternative embodiment of the anti-rotation safeguard 10a. Rather, the fixing element 6a is a part of a blind bore 15, more specifically the fixing element 6a is the axial bottom of the blind bore 15. An opening 7a for receiving and guiding the connecting element 11a is configured centrally in the fixing element 6a. Starting from the opening 7a, a bore 13 for receiving and guiding the connecting element 11 a is configured along the axial axis A of the adjusting spindle 4, as far as the transition to the pressure plate 4a. The dimensions and shape of the bore 13 and the opening 7a of the fixing element 6a are identical. That is to say, the bore 13 also has a hexagonal shape.

[0033] FIG. 4a once again shows the adjusting spindle 4, the pressure piece 9 and the anti-rotation safeguard 10a according to FIG. 3 and FIG. 4 in a non-sectioned illustration.

[0034] While the above description constitutes the preferred embodiments of the present invention, the invention is susceptible to modification, variation and change without departing from the proper scope and fair meaning of the accompanying claims.

LIST OF REFERENCE CHARACTERS AS ART OF THE DESCRIPTION

[0035] 1 Disc brake

[0036] 2 Brake disc

[0037] 3, 3a Brake linings

[0038] 4 Adjusting spindle

[0039] 4a Pressure plate

[0040] 5 Groove of the adjusting spindle 4

[0041] 5a Supporting wall of the groove 5

[0042] 5b Side wall of the groove 5

[0043] 6; 6a Fixing element

[0044] 7; 7a Opening of the fixing element 6, 6a

[0045] 8, 8a Lugs

[0046] 9 Pressure piece

[0047] 10; 10a Anti-rotation safeguard

[0048] 11; 11a Connecting element

[0049] 12 Guide of T-shaped configuration

[0050] 13 Bore

[0051] 14, 14a Bearing faces of the pressure piece 9

[0052] 15 Blind bore

[0053] 16 Interior space of the adjusting spindle 4

[0054] 17 Side wall of the adjusting spindle 4

[0055] A Axial axis of the adjusting spindle 4

[0056] AH Horizontal axis of the adjusting spindle 4

[0057] L Air play

[0058] LV Axial length of the connecting element 11

[0059] R Rotation of the adjusting spindle 4