Disc brake having a restoring device and a brake pad

Patent metadata

Field	Value
Publication number	US-9599176-B2
Application number	US-201414496911-A
Country	US
Kind code	B2
Filing date	Sep 25, 2014
Priority date	Mar 26, 2012
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A disc brake for a motor vehicle has a brake application device, a floating caliper that reaches over a brake disc, preferably a lining wear adjustment device, and a brake carrier having guiding surfaces opposite each other in the circumferential direction of the brake disc. Between the guiding surfaces, on the brake application side and the reaction side of the brake disc, at least one respective brake pad having a lining carrier and having at least one friction lining is guided movably parallel to an axis of rotation of the brake disc and can be actuated by a brake application force. At least one restoring device which supports at least the reaction-side brake pad on the brake carrier via the lining carrier, wherein the restoring device includes at least two restoring elements, which are attached to the lining carrier of at least the reaction-side brake pad in such a way that the restoring elements are guided movably parallel to the axis of rotation of the brake disc.

First claim

What is claimed is:

1. A disc brake having a brake disc, comprising:
a brake carrier;
a sliding caliper which, in use, straddles the brake disc;
a brake application device arranged in the caliper to actuate the disc brake by applying a brake application force;
wherein the brake carrier has guide faces arranged opposite one another in a circumferential direction of the brake disc;
brake pads, each brake pad comprising a lining carrier and a friction lining, the brake pads being guided displaceably parallel to a rotational axis of the brake disc between the guide faces of the brake carrier, one brake pad being arranged on an application side of the brake disc and another on a reaction side of the brake disc wherein at least the application side brake pad is actuated by the brake application force;
at least one restoring device configured to support at least the reaction side brake pad having the lining carrier on the brake carrier; and
wherein the restoring device comprises at least two restoring elements attached to the lining carrier of the reaction side brake pad so as to be guidable displaceably parallel to the rotational axis of the brake disc, wherein each restoring element comprises:
a sleeve mounted in a receptacle hole of the lining carrier so as to be displaceable parallel to the rotational axis of the brake disc, and
a restoring head arranged to protrude from the sleeve toward the brake disc, the restoring head being restorable elastically counter to a predefined force, wherein the restoring head is supported on a supporting face which protrudes from a guide face in the circumferential direction of the brake disc.

2. The disc brake according to claim 1 , wherein the receptacle hole is provided in a depression formed in the lining carrier on an outer edge region in the circumferential direction of the brake disc.

3. The disc brake according to claim 1 , wherein the friction lining of the brake pad includes cut outs, each cut out extending at least partially around a respective one of the two restoring elements.

4. The disc brake according to claim 1 , wherein an outer casing of each restoring element is configured as a clamping sleeve.

5. The disc brake according to claim 1 , wherein an outer casing of each restoring element has a knurled surface portion.

6. The disc brake according to claim 1 , wherein the restoring head comprises an axle body extending into an outer casing, and a pressing face arranged at one end perpendicular to a longitudinal length of the axle body.

7. The disc brake according to claim 6 , wherein the axle body is held in an oversprung manner in the outer casing.

8. The disc brake according to claim 6 , wherein the axle body is supported on at least one spring mounted in the outer casing.

9. The disc brake according to claim 8 , wherein the at least one spring is a helical or disc spring.

10. The disc brake according to claim 6 , wherein the pressing face is supportable on an end side of the outer casing, said end side facing the supporting face.

11. The disc brake according to claim 1 , wherein the at least two restoring elements are configured to be held stationary in the lining carrier up to a defined force that acts parallel to the rotational axis of the brake disc and is less than the brake application force applied by the brake application device during a braking operation.

12. The disc brake according to claim 1 , wherein the restoring device is configured to have a restoring force that differs in magnitude between the reaction side brake pad and the application-side brake pad.

13. A brake pad for a sliding caliper disc brake equipped with a brake application device that applies a brake application force during braking operation, the brake pad comprising:
a lining carrier;
a friction lining arranged on one side of the lining carrier;
at least two restoring elements attached to the lining carrier in circumferential edge regions thereof, wherein
each restoring element is configured to be displaceably guidable parallel to a rotational axis of a brake disc, wherein each restoring element comprises:
a sleeve mounted in a receptacle hole of the lining carrier so as to be displaceable parallel to the rotational axis of the brake disc, and
a restoring head arranged to protrude from the sleeve toward the brake disc, the restoring head being restorable elastically counter to a predefined force, wherein the restoring head is supported on a supporting face which protrudes from a guide face in the circumferential direction of the brake disc.

14. The brake pad according to claim 13 , wherein the receptacle hole is provided in a depression formed in the lining carrier on an outer edge region in the circumferential direction of the brake disc.

15. The brake pad according to claim 14 , wherein the friction lining of the brake pad includes cut outs, each cut out extending at least partially around a respective one of the two restoring elements.

16. The brake pad according to claim 15 , wherein an outer casing of each restoring element is configured as a clamping sleeve.

17. The brake pad according to claim 15 , wherein an outer casing of each restoring element has a knurled surface portion.

18. The brake pad according to claim 15 , wherein the restoring head comprises an axle body extending into an outer casing, and a pressing face arranged at one end perpendicular to a longitudinal length of the axle body.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Baumgartner Johann
• Werth Alexander
• Weggartner Robert
• Kielbasa Rudolf
• Fishchl Tobias

Classifications

• F16D2121/02

  Fluid pressure · CPC title

• F16D65/0973 Primary

  not subjected to brake forces · CPC title

• F16D65/18

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

• F16D65/092

  for axially-engaging brakes, e.g. disc brakes · CPC title

• F16D55/226 Primary

  in which the common actuating member is moved axially {, e.g. floating caliper disc brakes} · CPC title