Disc brake

Patent metadata

Field	Value
Publication number	US-9382957-B2
Application number	US-201414495070-A
Country	US
Kind code	B2
Filing date	Sep 24, 2014
Priority date	Mar 26, 2012
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A disc brake, in particular for a commercial vehicle, has a brake caliper that reaches over a brake disc and is designed as a floating caliper. The brake caliper is fastened to a stationary brake carrier. A brake application device, by which an associated, application-side brake lining can be pressed against the brake disc during braking, is provided, as well as, at least one restoring device having a restoring element, by which restoring device the brake caliper can be brought into an initial position after displacement and release of the brake as a result of braking. The restoring device is designed such that it is retained both in the brake caliper and in the brake carrier on the side of the brake disc opposite the brake application device.

First claim

What is claimed is:

1. A disc brake, comprising:
a caliper which, in use, straddles a brake disc and is configured as a sliding caliper;
a fixed brake carrier on which the sliding caliper is mounted;
a brake application device arranged in the caliper, by which brake application device an associated application-side brake pad is pressable against the brake disc during braking; and
at least one restoring device comprising a return element, wherein
the restoring device is held both in the brake caliper and in the brake carrier in parts thereof that are on an opposite side of the brake disc from the brake application device, the restoring device being separate and spaced from guide bars on which the caliper slides relative to the brake carrier, and being configured to return the caliper into an initial position after sliding due to the braking and release of the braking.

2. The disc brake according to claim 1 , wherein the disc brake is a commercial vehicle disc brake.

3. The disc brake according to claim 1 , further comprising:
an adjusting device integrated into the restoring device.

4. The disc brake according to claim 1 , wherein the return element of the restoring device comprises a compression spring.

5. The disc brake according to claim 4 , wherein the compression spring is formed of at least one diaphragm spring.

6. The disc brake according to claim 4 , wherein the restoring device further comprises a bolt connected to the brake carrier.

7. A disc brake, comprising:
a caliper which, in use, straddles a brake disc and is configured as a sliding caliper;
a fixed brake carrier on which the sliding caliper is mounted;
a brake application device arranged in the caliper, by which brake application device an associated application-side brake pad is pressable against the brake disc during braking; and
at least one restoring device comprising a return element, wherein
the restoring device is held both in the brake caliper and in the brake carrier on an opposite side of the brake disc from the brake application device, the restoring device being configured to return the caliper into an initial position after sliding due to the braking and release of the braking,
the restoring device comprising:
a compression spring configured as the return element,
a bolt connected to the brake carrier,

pot-shaped cover secured in a recess of the brake caliper, and
a sleeve firmly connected to the pot-shaped cover to form an inner chamber in the pot-shaped cover.

8. The disc brake according to claim 7 , wherein the restoring device further comprises:
a clamping ring held non positively on the bolt, the clamping ring being positioned in the sleeve, wherein
the clamping ring forms an abutment for the compression spring, which compression spring is supported on another side on a bottom of the sleeve.

9. The disc brake according to claim 8 , wherein:
the sleeve has two stops arranged with a spacing relative to one another, the two stops providing an axial stop for the clamping ring,
an overall height of the clamping ring is less than the spacing of the two stops, wherein a differential dimension therein formed corresponds to a predetermined release clearance of the disc brake.

10. The disc brake according to claim 9 , wherein an axial clamping force of the clamping ring, by which the clamping ring is held on the bolt, is greater than a spring force of the compression spring.

11. The disc brake according to claim 10 , wherein the pet-pot-shaped cover has a concertric sealing ring, and
adjoining the concentric sealing ring, a scraper rests on the bolt.

12. The disc brake according to claim 11 , wherein a spring travel of the compression spring is greater than a size of the predetermined release clearance.

13. The disc brake according to claim 12 , wherein an outer diameter of the clamping ring is less than a clear diameter of the sleeve.

14. A restoring device for returning a sliding caliper of a disc brake to an initial position after movement due to braking, the restoring device comprising:
a bolt configured to be connectable to a brake carrier of the disc brake;
a pot-shaped cover configured to be secured in a recess of the sliding caliper;
a sleeve firmly connected to an interior of the pot-shaped cover in order to form an inner chamber, the bolt extending into the inner chamber;
a clamping ring held non positively on the bolt, the clamping ring being positioned in the sleeve;
a compression spring that forms an abutment for the clamping ring on one side thereof and is supported on the other side thereof on a bottom portion of the sleeve, wherein
the sleeve has two stops arranged with a spacing relative to one another to provide an axial stop for the clamping ring, an overall height of the clamping ring being less than a spacing of the stops and a differential dimension between the overall height of the clamping ring and the spacing of the stops being configured to correspond to a predetermined release clearance of the disc brake.

15. The restoring device according to claim 14 , wherein the clamping ring is provided with an axial clamping force for holding the clamping ring non positively on the bolt, the axial clamping force being designed to be greater than a spring force of the compression spring by which the caliper is returned to the initial position after movement due to braking.

16. The restoring device according to claim 15 , wherein the cover comprises a concentric sealing ring and, adjoining the concentric sealing ring, a scraper, wherein the scraper rests against the bolt.

17. The restoring device according to claim 16 , wherein a spring travel of the compression spring is greater than a size of the predetermined release clearance.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Asen Alexander
• Fricke Jens
• Iraschko Johann
• Stoeger Christian
• Peschel Michael

Classifications

• F16D65/0068 Primary

  Brake calipers · CPC title

• F16D2127/02

  Release mechanisms · CPC title

• F16D2055/0029

  Retraction devices · CPC title

• F16D65/58

  with eccentric or helical body · CPC title

• F16D65/0972

  transmitting brake reaction force, e.g. elements interposed between torque support plate and pad · CPC title