Adjustment device for a disc brake

Patent metadata

Field	Value
Publication number	US-9874259-B2
Application number	US-201414268549-A
Country	US
Kind code	B2
Filing date	May 2, 2014
Priority date	Nov 3, 2011
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

An adjustment device is provided for adjusting the wear of brake pads and a brake disk of a disc brake, in particular of a pneumatically actuated disc brake. The disc brake includes a brake application device actuated by a rotary lever, which brake application device has an adjusting spindle into which the adjustment device is insertable. The adjustment device is attached to a brake caliper of the disc brake by way of a bearing disk. The adjustment device is provided with a spindle and at least one friction pairing, each friction pairing having two contact surfaces. The friction pairing has a curved cross-section of at least one of its two contact surfaces.

First claim

What is claimed is:

1. An adjustment device for adjusting wear of brake pads and a brake disc of a heavy commercial vehicle disc brake having a brake caliper and a rotary lever actuated brake application device including an actuating spindle in which the adjustment device is insertable, the adjustment device comprising:
an adjustment device spindle having, adjacent one spindle end, a drive journal with a corresponding profile for a tool, a flange, and a spindle body section located between the drive journal and the flange, the drive journal, the flange, and the spindle body section forming a single piece, unitary body;
a bearing plate for securing the adjustment device in place in the brake caliper of the heavy commercial vehicle and through which the adjustment device spindle runs away from said one spindle end along a spindle axis; and
at least one friction combination comprising a spindle contact face of the adjustment device spindle and a circumferential contact face of a disk located between the bearing plate and the flange of the adjustment device spindle,
wherein at least one of the spindle and circumferential contact faces of the friction combination has a curved cross-section.

2. The adjustment device according to claim 1 , wherein the curved cross-section of the at least one of the spindle and circumferential contact faces of the friction combination includes at least one elevation that forms an effective radius of the friction combination.

3. The adjustment device according to claim 2 , wherein the curved cross-section has a convex configuration.

4. The disc brake according to claim 2 , wherein at least one of the spindle and circumferential contact faces of the friction combination is surface-treated.

5. The disc brake according to claim 2 , wherein the located between the bearing plate and the flange has said circumferential contact face and a spherical section face, and the spherical section face contacts the bearing plate.

6. The disc brake according to claim 5 , wherein the spindle contact face is provided with the curved cross-section of the friction combination.

7. The disc brake according to claim 5 , wherein the circumferential contact face of the disk is formed with the curved cross-section.

8. The disc brake according to claim 7 , wherein the disk located between the bearing plate and the flange comprises:
a spherical layer;
a carrier section; and
a spherical disk contact section,
wherein the spherical disk contact section is arranged at an opposite end from the spherical layer and includes the contact face having the curved cross-section.

9. The disc brake according to claim 8 , wherein the disk further comprises a passage extended axially through the spherical layer, the passage communicating with a hollowed-out portion of the carrier section.

10. The disc brake according to claim 9 , wherein an axial passage length of the passage corresponds substantially to an axial layer thickness of the spherical layer.

11. The adjustment device according to claim 1 , wherein the disk located between the bearing plate and the flange has said circumferential contact face and a spherical section face, and the spherical section face contacts the bearing plate.

12. The adjustment device according to claim 11 , wherein the spindle contact face is provided with the curved cross-section of the friction combination.

13. The adjustment device according to claim 11 , wherein the circumferential contact face is formed with the curved cross-section.

14. The adjustment device according to claim 13 , wherein the disk located between the bearing plate and the flange comprises:
a spherical layer;
a carrier section; and
a spherical disk contact section,
wherein the spherical disk contact section is arranged at an opposite end from the spherical layer and includes the contact face having the curved cross-section.

15. The adjustment device according to claim 14 , wherein the disk further comprises a passage extended axially through the spherical layer, the passage communicating with a hollowed-out portion of the carrier section.

16. The adjustment device according to claim 15 , wherein an axial passage length of the passage corresponds substantially to an axial layer thickness of the spherical layer.

17. The adjustment device according to claim 1 , wherein at least one of the spindle and circumferential contact faces of the friction combination is surface-treated.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh
• Knorr-Bremse Systeme Fuer Nutfahrzeuge Gmbh

Inventors

• Tropp Martin

Classifications

• F16D65/567

  for mounting on a disc brake · CPC title

• F16D65/52 Primary

  self-acting in one direction for adjusting excessive play · CPC title

• F16D2125/28

  Cams; Levers with cams · CPC title

• F16D65/18 Primary

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