Actuation mechanism

Patent metadata

Field	Value
Publication number	US-10895296-B2
Application number	US-201916380082-A
Country	US
Kind code	B2
Filing date	Apr 10, 2019
Priority date	Apr 30, 2018
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

An operating shaft and an actuation mechanism for a disc brake. The actuation mechanism may include a wear adjuster mechanism and the operating shaft. The operating shaft may include opposed pairs of arcuate surfaces arranged with offset axes of rotation and a recess therebetween for accommodating a portion of the wear adjuster mechanism.

First claim

What is claimed is:

1. An operating shaft for a disc brake, the operating shaft comprising:
opposed pairs of arcuate surfaces arranged with offset axes of rotation, one arcuate surface of each pair adapted to be grounded to a housing of the disc brake and the other arcuate surface of each pair adapted to transmit an actuating force to a brake pad of the disc brake upon rotation of the operating shaft;
a recess intermediate the pairs of arcuate surfaces for accommodating a portion of a wear adjuster mechanism; and
a pin adapted to engage a corresponding input driving portion of the wear adjuster mechanism, wherein the pin extends at a non-zero angle with respect to both the axes of rotation and a direction of transmission of the actuating force, and wherein the pin has a longitudinal axis, and wherein the longitudinal axis of the pin does not intersect the axes of rotation.

2. The operating shaft of claim 1 wherein the pin is a separate component from the operating shaft or input driving portion and is mounted to the operating shaft or input driving portion.

3. The operating shaft of claim 2 wherein the operating shaft or input driving portion comprises a hole arranged to receive the pin.

4. The operating shaft of claim 3 wherein the pin is dimensioned to be a press-fit or interference fit within the hole.

5. The operating shaft of claim 1 wherein the pin is provided with a part-spherical head.

6. The operating shaft of claim 5 wherein the part-spherical head has a diameter greater than a shank of the pin.

7. The operating shaft of claim 1 wherein the pin has a flattened region at an end remote from a shank of the pin.

8. The operating shaft of claim 1 wherein the pin has a flattened region on a surface that faces a lateral midpoint of the recess.

9. The operating shaft of claim 1 wherein the pin extends adjacent to a wall of the operating shaft defining a perimeter of the recess.

10. The operating shaft of claim 1 wherein the operating shaft comprises a tongue of material extending into the recess and a hole is provided in the tongue.

11. The operating shaft of claim 1 wherein the non-zero angle is between 55° and 85° with respect to the axes of rotation.

12. A disc brake adapted to be air, hydraulically or electrically actuated, the disc brake comprising:
a housing;
a wear adjuster mechanism having an input driving portion; and
an operating shaft that includes:
opposed pairs of arcuate surfaces arranged with offset axes of rotation, one arcuate surface of each pair arranged to be grounded to the housing and the other arcuate surface of each pair arranged to transmit an actuating force to a brake pad of the disc brake upon rotation of the operating shaft;
a recess intermediate the pairs of arcuate surfaces for accommodating a portion of the wear adjuster mechanism; and
a pin arranged to engage a corresponding slot of the input driving portion;

wherein the pin extends at a non-zero angle with respect to both the axes of rotation and a direction of transmission of the actuating force, and wherein the pin has a longitudinal axis, and wherein the longitudinal axis of the pin does not intersect the axes of rotation.

13. The disc brake of claim 12 wherein the wear adjuster mechanism comprises a manual adjuster shaft at least partially disposed in the recess.

14. An operating shaft for a disc brake, the operating shaft comprising:
opposed pairs of arcuate surfaces arranged with offset axes of rotation, one arcuate surface of each pair adapted to be grounded to a housing of the disc brake and the other arcuate surface of each pair adapted to transmit an actuating force to a brake pad of the disc brake upon rotation of the operating shaft;
a recess intermediate the pairs of arcuate surfaces for accommodating a portion of a wear adjuster mechanism;
a pin adapted to engage a corresponding input driving portion of the wear adjuster mechanism, the pin extending from the operating shaft at a non-zero angle with respect to the axes of rotation and a direction of force transmission; and
a tongue of material extending into the recess:
wherein a hole is provided in the tongue, the hole arranged to receive the pin.

15. The operating shaft of claim 14 wherein the pin is dimensioned to be a press-fit or interference fit within the hole.

16. The operating shaft of claim 14 wherein the pin is provided with a part-spherical head.

17. The operating shaft of claim 16 wherein the part-spherical head has a diameter greater than a shank of the pin.

18. The operating shaft of claim 14 wherein the pin has a flattened region at an end remote from a shank of the pin.

19. The operating shaft of claim 14 wherein the pin has a flattened region on a surface that faces a lateral midpoint of the recess.

20. The operating shaft of claim 14 wherein the pin extends adjacent to a wall of the operating shaft defining a perimeter of the recess.

Assignees

• Meritor Heavy Vehicle Braking Systems Uk Ltd

Inventors

• Kulkarni Sanjeev
• Taylor Martin
• Kumar Arun

Classifications

• F16D65/18 Primary

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

• F16D2121/24

  using motors · CPC title

• F16D2121/14

  Mechanical · CPC title

• F16D2121/02

  Fluid pressure · CPC title

• F16D65/567

  for mounting on a disc brake · CPC title