Disc brake for a vehicle, particularly for a commercial vehicle

Patent metadata

Field	Value
Publication number	US-10794443-B2
Application number	US-201815909667-A
Country	US
Kind code	B2
Filing date	Mar 1, 2018
Priority date	Sep 1, 2015
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A disc brake for a vehicle, particularly for a commercial vehicle, includes a brake caliper which straddles a brake disc and in which an application device is arranged, a single-piece rotary lever which has an eccentric element, and at least one brake plunger which is designed as a power screw arrangement having a rotational axis and with which, when the rotary lever is actuated, at least one brake pad can be pressed against the brake disc. The rotary lever is arranged in the brake caliper such that it can pivot relative thereto, and is supported directly or by way of one or more elements connected therebetween, on said brake caliper, in at least one support region. The rotary lever, which can pivot relative to the brake plunger, has at least one convexly-formed section on the side thereof that lies opposite the support point on the brake caliper, and this section lies against a matching concave end face in the axial extension of the rotational axis of said power screw arrangement.

First claim

What is claimed is:

1. A disc brake for a vehicle, comprising:
a brake caliper which is configured to straddle a brake disc and in which a brake application device is arranged;
a single-piece rotary lever which has an eccentric; and
at least one brake plunger which is configured as a threaded spindle arrangement with a rotational axis, and by way of which at least one brake pad is pressable against the brake disc upon actuation of the rotary lever, wherein
the rotary lever is arranged in the brake caliper so as to pivot relative thereto, and is supported on the brake caliper in at least one supporting region directly or via one or more elements which are connected in between,
the rotary lever which is pivotable with respect to the brake plunger, has at least one convexly shaped section on a side which lies opposite the supporting region on the brake caliper, the at least one convexly shaped section abutting directly or via a plain bearing against a concave end side of a respective one of the at least one brake plunger which is adapted to the at least one convexly shaped section, in an axial extension of the rotational axis of the threaded spindle arrangement,
on a side of the rotary lever which lies opposite the at least one convexly shaped section, the rotary lever is supported on at least one ball which bears against a bearing block which is held on the brake caliper,
the ball lies in a recess which is adapted to its shape, and
the bearing block is configured as a separate component.

2. The disc brake as claimed in claim 1 , wherein
the at least one convexly shaped section is configured as a spherical section.

3. The disc brake as claimed in claim 1 , wherein
the at least one convexly shaped section is configured as an elliptically shaped section.

4. The disc brake as claimed in claim 1 , wherein
the at least one convexly shaped section is configured as a section shaped in a manner of a barrel section.

5. The disc brake as claimed in claim 1 , wherein
the at least one convexly shaped section is configured as a cylinder section, a curvature extending in a pivoting direction of the rotary lever.

6. The disc brake as claimed in claim 1 , further comprising:
a gear mechanism wheel, which is operatively connected to an adjusting device, is arranged fixedly on the brake plunger so as to rotate with it, wherein
the concave end side, against which the at least one convexly shaped section bears, is provided on the brake plunger or on the gear mechanism wheel.

7. The disc brake as claimed in claim 1 , wherein
the at least one convexly shaped section and/or the concave end side which bears against it, are precision machined by way of vibratory grinding, lapping, polishing, honing, eroding or rolling.

8. The disc brake as claimed in claim 1 , wherein
the at least one convexly shaped section and/or the concave end side of the brake plunger which is adapted to it are provided with a bearing shell.

9. The disc brake as claimed in claim 8 , wherein
the at least one convexly shaped section or the bearing shell of the rotary lever corresponds in terms of the extent in the pivoting direction of the rotary lever to a maximum pivoting travel of the rotary lever.

10. The disc brake as claimed in claim 1 , wherein
the at least one convexly shaped section is configured on the eccentric of the rotary lever.

11. The disc brake as claimed in claim 1 , further comprising:
at least one anti-friction body provided on the rotary lever on the side which lies opposite the at least one convexly shaped section.

12. The disc brake as claimed in claim 11 , wherein
at least one bearing device is provided between the anti-friction body and the rotary lever and/or between the anti-friction body and the brake caliper.

13. The disc brake as claimed in claim 12 , wherein
the at least one bearing device is configured as a plain bearing shell.

14. The disc brake as claimed in claim 12 , wherein
the at least one bearing device is configured as an anti-friction bearing shell.

15. The disc brake as claimed in claim 11 , wherein
a bearing shell on the at least one convexly shaped section of the rotary lever and/or a plain bearing shell are formed to receive an anti-friction body of a composite plain bearing.

16. The disc brake as claimed in claim 6 , wherein
the gear mechanism wheel, which is connected fixedly to the brake plunger so as to rotate with it, and an adjusting device gear mechanism wheel which corresponds therewith, are arranged in a driver device which is held on the adjusting device so as to be displaced axially but secured against rotation.

17. The disc brake as claimed in claim 16 , wherein
the driver device comprises two plates which are arranged parallel to and at a spacing from one another.

18. The disc brake as claimed in claim 17 , further comprising:
spacer sleeves provided in order to space the two plates apart, through which spacer sleeves screws are guided.

19. The disc brake as claimed in claim 1 , wherein
the bearing block has a cylindrical journal which adjoins a support pin of greater diameter and which is inserted into a bore of the brake caliper.

20. The disc brake as claimed in claim 1 , wherein
at least one of two bearing blocks which are arranged parallel to and at a spacing from one another is held on the brake caliper in a manner which compensates for tolerances.

21. The disc brake as claimed in claim 1 , wherein
the bearing block is configured as a cold pressed part.

22. The disc brake as claimed in claim 19 , wherein
a stepped supporting face is formed between the support pin and the journal, which supporting face extends circumferentially transversely with respect to the longitudinal axis of the bearing block, and bears against a machined bearing face of the brake caliper.

23. The disc brake as claimed in claim 22 , wherein
the bearing block is rotationally symmetrical.

24. The disc brake as claimed in claim 20 , wherein a journal of the two bearing blocks is connected fixedly to the brake caliper.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Beck Thomas
• Pritz Wolfgang
• Hidringer Michael
• Heindl Martin

Classifications

• F16D65/56

  with screw-thread and nut · CPC title

• F16D65/18 Primary

  adapted for drawing members together {, e.g. for disc brakes} · CPC title

• F16D2125/32

  acting on one cam follower · CPC title

• F16D65/183 Primary

  with force-transmitting members arranged side by side acting on a spot type force-applying member · CPC title

• F16D65/568

  for synchronous adjustment of actuators arranged in parallel · CPC title