Disk brake, in particular for commercial vehicles

Patent metadata

Field	Value
Publication number	US-10876586-B2
Application number	US-201615767142-A
Country	US
Kind code	B2
Filing date	Sep 6, 2016
Priority date	Oct 12, 2015
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

A disk brake includes a wear sensor and an adjusting device having an adjusting element in the form of a pressure screw and/or a pressure sleeve. The adjusting element has a recess in which a reset device extends which is rotationally coupled to the adjusting element for resetting the adjusting device. The wear sensor lies at least partially in the recess.

First claim

The invention claimed is:

1. A disk brake, comprising:
a wear sensor; and
an adjusting device having an adjusting element in the form of a pressure screw and/or a pressure sleeve,
wherein the adjusting element has a recess in which a reset device extends,
wherein the reset device is rotationally coupled to the adjusting element for resetting the adjusting device,
wherein the reset device is coaxial with the adjusting element, and
wherein at least a portion of the wear sensor lies in the recess and between the reset device and the adjusting element.

2. The disk brake as claimed in claim 1 , wherein the reset device, the recess, and the adjusting element are coaxial, and wherein the wear sensor is a linear sensor which detects an axial position of the adjusting element.

3. The disk brake as claimed in claim 1 , wherein the wear sensor includes a Hall effect sensor.

4. The disk brake as claimed in claim 1 , further comprising a reset shoulder rotationally coupled to the reset device via a gear mechanism.

5. The disk brake as claimed in claim 4 , wherein the reset shoulder is designed for application of a reset tool.

6. The disk brake as claimed in claim 1 , further comprising a holding device that holds the wear sensor and extends into the recess.

7. The disk brake as claimed in claim 6 , further comprising a brake caliper, wherein the holding device is mounted in the brake caliper.

8. The disk brake as claimed in claim 6 , wherein the reset device is held by the holding device.

9. The disk brake as claimed in claim 6 , wherein the holding device, the wear sensor, the reset device, the gear mechanism, and the reset shoulder form one structural unit.

10. The disk brake as claimed in claim 1 , further comprising brake pads and a brake disk,
wherein the adjusting device comprises the pressure screw and the pressure sleeve and is configured to adjust an axial position of at least one brake pad to ensure that a predetermined air gap is maintained between the brake pads and the brake disk.

11. The disk brake as claimed in claim 10 , wherein the reset device comprises an axially extending shaft and a multisided head, the multisided head being keyed into the pressure screw thereby enabling the reset device to rotate the pressure screw.

12. The disk brake as claimed in claim 11 , wherein the adjusting element is in the form of the pressure screw, the at least a portion of the wear sensor comprises one or more magnets, and the disk brake further comprises:
one or more coil springs configured to axially couple the one or more magnets with the pressure screw.

13. The disk brake as claimed in claim 11 , wherein the wear sensor comprises a stationary Hall effect sensor and one or more movable magnets;
the disk brake further comprising a holding device to which the Hall effect sensor and a coil spring are mounted,
wherein the coil spring is configured to cause the one or more magnets to move axially with the pressure screw.

14. The disk brake as claimed in claim 1 , wherein the wear sensor comprises a stationary Hall effect sensor and one or more movable magnets;
the disk brake further comprising a holding device to which the stationary Hall effect sensor and a coil spring are mounted,
wherein the coil spring is configured to cause the one or more magnets to move axially with the pressure screw and is at least partially disposed within the recess.

15. A disk brake, comprising:
a brake pad;
a wear sensor;
an adjusting device comprising a pressure screw and a pressure sleeve, the adjusting device being configured to adjust an axial position of the brake pad; and
a reset device rotationally coupled to the pressure screw and configured to reset an axial position of the adjusting device, the reset device being coaxial with the pressure screw;
wherein a recess, through which the reset device extends, is disposed in an interior of the pressure screw and the pressure sleeve, and
wherein at least a portion of the wear sensor lying lies in the recess and between the pressure screw and the reset device.

16. The disk brake as claimed in claim 15 , wherein the at least a portion of the wear sensor comprises one or more magnets, and wherein the disk brake further comprises one or more coil springs axially coupling the one or more magnets to the pressure screw such that the one or more magnets follow axial motion of the pressure screw.

17. The disk brake as claimed in claim 16 , wherein the recess comprises a bore and the reset device comprises a multi-sided head keyed into the pressure screw within the bore, and wherein the one or more coil springs are configured to press the at least a portion of the wear sensor against a shoulder of the pressure screw, the shoulder serving as an internal surface of the bore.

18. The disk brake as claimed in claim 15 , wherein the at least a portion of the wear sensor comprises two magnets disposed radially intermediate the reset device and the pressure screw,
wherein the wear sensor comprises a stationary Hall effect sensor in addition to the two moveable magnets and the disk brake further comprises a holding device to which the Hall effect sensor and a coil spring are mounted, and
wherein the coil spring is configured to cause the two magnets to move axially with the pressure screw and at least a portion of the coil spring is disposed in the recess.

19. The disk brake as claimed in claim 15 , wherein recess comprises a bore extending through the pressure screw, and the reset device and the pressure screw are coaxial about an axis of rotation of the pressure screw,
wherein the at least a portion of the sensor device is disposed radially outward of the axis of rotation and radially inward of an outer screw thread of the pressure screw, and
wherein a perimeter of the bore is disposed radially outward of the at least a portion of the sensor device with respect to the axis of rotation.

20. The disk brake as claimed in claim 19 , further comprising a coil spring disposed within the bore,
wherein the at least a portion of the sensor device comprises one or more magnets and the coil spring is disposed radially outward of the one or more magnets.

Assignees

• Wabco Europe Bvba

Inventors

• Jungmann Hans-Christian
• Stumpf Martin

Classifications

• F16D2121/14

  Mechanical · CPC title

• F16D2125/26

  Cranks · CPC title

• F16D2125/32

  acting on one cam follower · CPC title

• F16D66/025

  sensing the position of parts of the brake system other than the braking members, e.g. limit switches mounted on primary cylinders · CPC title

• F16D65/567

  for mounting on a disc brake · CPC title