Lining wear adjustment device for a disc brake

Patent metadata

Field	Value
Publication number	US-10060490-B2
Application number	US-201414455450-A
Country	US
Kind code	B2
Filing date	Aug 8, 2014
Priority date	Feb 10, 2012
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

A lining wear adjustment device for a disc brake with a brake application device having a brake actuating lever, which can preferably be inserted into an adjustment spindle of the disc brake, includes an adjusting shaft with an external bearing, a rotary drive element and a clutch device for switchable coupling of the rotary drive element to the adjusting shaft. The clutch device is an electrically controllable solenoid clutch with at least one electromagnetic coil.

First claim

What is claimed is:

1. A lining wear adjustment device for a disc brake having a brake application device with a brake actuating lever and an adjustment spindle, the lining wear adjustment device being configured to be operatively arranged between the brake actuating lever and the adjustment spindle, comprising:
an adjustment shaft having an external bearing, the adjustment shaft being configured to be co-axially arranged with the adjustment spindle and to cooperate with the adjustment spindle to linearly displace the adjustment spindle along a adjustment spindle longitudinal axis when the adjustment shaft rotates about the longitudinal axis;
a rotary drive element drivable by the brake application lever to rotate about the longitudinal axis; and
a clutch device operatively configured to controllably couple the rotary drive element to the adjustment shaft, the clutch device being an electrically controllable linearly-displaceable solenoid clutch having at least one electromagnetic coil and being configured such that when energized, the rotary drive element rotates the adjustment shaft and linearly displaces the adjustment spindle when the rotary drive element is driven by the brake application lever.

2. The lining wear adjustment device as claimed in claim 1 , wherein the clutch device comprises:
a clutch input side including at least one of a section of the rotary drive element and a section of a clutch element rotationally fixed to the rotary drive element;
a clutch cover;
the at least one electromagnetic coil; and
a coil carrier for the electromagnetic coil.

3. The lining wear adjustment device as claimed in claim 2 , wherein the rotary drive element is arranged in an axially displaceable manner at the input side of the clutch device and is rotatable about the longitudinal axis.

4. The lining wear adjustment device as claimed in claim 2 , wherein the rotary drive element is coupled to an input side of the clutch device and is rotatable about the longitudinal axis, and is coupled in a rotationally fixed manner to an axially displaceable clutch element.

5. The lining wear adjustment device as claimed in claim 3 , wherein the coil carrier is connected in a rotationally fixed manner to the rotary drive element.

6. The lining wear adjustment device as claimed in claim 4 , wherein the coil carrier is connected in a rotationally fixed manner to the rotary drive element.

7. The lining wear adjustment device as claimed in claim 3 , wherein the coil carrier is fixedly connected to the external bearing of the adjustment shaft.

8. The lining wear adjustment device as claimed in claim 4 , wherein the coil carrier is fixedly connected to the external bearing of the adjustment shaft.

9. The lining wear adjustment device as claimed in claim 3 , wherein
the coil carrier has a disc section having a shell receptacle which is spherical in a central region, in which the spherical shell receptacle receives a spherical projection of a disc of the external bearing of the adjustment shaft and corresponds to the spherical projection of the disc of the external bearing.

10. The lining wear adjustment device as claimed in claim 4 , wherein
the coil carrier has a disc section having a shell receptacle which is spherical in a central region, in which the spherical shell receptacle receives a spherical projection of a disc of the external bearing of the adjustment shaft and corresponds to the spherical projection of the disc of the external bearing.

11. The lining wear adjustment device as claimed in claim 2 , wherein
the clutch cover surrounds the electromagnetic coil axially and at an end of the electromagnetic coil facing an adjustment spindle-engaging end of the adjustment shaft, and
the clutch cover is connected in a rotationally fixed fashion to the adjustment shaft and has a clutch region which is rotationally fixed to the clutch input side when the electromagnetic coil is energized.

12. The lining wear adjustment device as claimed in claim 11 , wherein the clutch section comprises friction linings.

13. The lining wear adjustment device as claimed in claim 11 , wherein the clutch section comprises a toothed clutch.

14. The lining wear adjustment device as claimed in claim 13 , wherein the toothed clutch has an oblique angle which is in the region of 20°.

15. The lining wear adjustment device as claimed in claim 1 , wherein the clutch device comprises at least one release or resetting spring.

16. The lining wear adjustment device as claimed in claim 1 , wherein the external bearing has a cardanic bearing of the adjustment shaft.

17. The lining wear adjustment device as claimed in claim 1 , further comprising:
a connection device connected in an electrically conductive manner to the at least one electromagnetic coil.

18. The lining wear adjustment device as claimed in claim 17 , wherein the connection device has a plug-type connection via which the electromagnetic coil is connected electrically.

19. The lining wear adjustment device as claimed in claim 18 , wherein the plug-type connection has conductors which are guided through the external bearing via an elastic securing device and are secured in said external bearing.

20. The lining wear adjustment device as claimed in claim 17 , further comprising at least one lining wear sensor.

21. The lining wear adjustment device as claimed in claim 20 , wherein the at least one lining wear sensor is at least partially a component of the connection device.

22. The lining wear adjustment device as claimed in claim 21 , wherein the at least one lining wear sensor is an angle sensor, wherein a wear sensor element is arranged in the connection device and interacts with a wear encoder element which is connected to the adjustment shaft.

23. The lining wear adjustment device as claimed in claim 22 , wherein the wear encoder element is a permanent magnet.

24. The lining wear adjustment device as claimed in claims 17 , further comprising at least one actuating lever sensor.

25. The lining wear adjustment device as claimed in claim 24 , wherein the at least one actuating lever sensor is at least partially a component of the connection device.

26. The lining wear adjustment device as claimed in claim 25 , wherein
the at least one actuating lever sensor is an angle sensor, and
an adjusting sensor element is arranged in the connection device and interacts with an actuating encoder element which is coupled to the brake actuating lever.

27. The lining wear adjustment device as claimed in claim 26 , wherein the actuating encoder element is a permanent magnet.

28. The lining wear adjustment device as claimed in claim 17 , wherein the connection device has a control unit.

29. The lining wear adjustment device as claimed in claim 1 , wherein the clutch device has at least one anti-rotation device.

30. The lining wear adjustment device as claimed in claim 1 , wherein the lining wear adjustment device is configured to be inserted into an adjustment spindle of the disc brake for rotating the adjustment spindle to perform wear adjustment.

31. A method for controlling a lining wear adjustment device as claimed in claim 1 , the method comprising the acts of:
detecting wear of brake linings of the disc brake;
adjusting for the wear of the brake linings upon reaching a preset comparison

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Miller Bernhard

Classifications

• F16D65/567

  for mounting on a disc brake · CPC title

• F16D2129/08

  Electromagnets · CPC title

• F16D27/06

  with friction surfaces arranged within the flux · CPC title

• F16D27/02 Primary

  with electromagnets incorporated in the clutch, i.e. with collecting rings {(F16D27/004 takes precedence)} · CPC title

• F16D2125/28

  Cams; Levers with cams · CPC title