Brake assembly and method of control

Patent metadata

Field	Value
Publication number	US-9618067-B2
Application number	US-201414564139-A
Country	US
Kind code	B2
Filing date	Dec 9, 2014
Priority date	Dec 9, 2014
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A brake assembly that may include a housing assembly, a piston assembly, an operating shaft, and a sensor assembly. The operating shaft may be configured to rotate about an axis to actuate the piston assembly and translate a brake pad assembly from a retracted position to an extended position. The sensor assembly may be configured to detect rotation of the operating shaft.

First claim

What is claimed is:

1. A brake assembly comprising:
a housing assembly;
a piston assembly moveably disposed within the housing assembly;
an operating shaft that is provided with a position feature and that is disposed proximate the housing assembly, wherein the operating shaft rotates about an operating shaft axis to actuate the piston assembly and translate a brake pad assembly from a retracted position to an extended position;
an adjuster mechanism that is operatively connected to the piston assembly and is configured to adjust the extended position;
a slide pin assembly upon which the housing assembly translates; and
a sensor assembly that is disposed proximate the housing assembly, the sensor assembly having a first sensor that detects a position of the adjuster mechanism, a second sensor that detects a position of the slide pin assembly, and a third sensor that detects rotation of the operating shaft by detecting a position of the position feature, wherein the first sensor, second sensor, and third sensor are disposed in a single housing.

2. The brake assembly of claim 1 wherein the position feature is a magnetic emitter disposed on an end surface of the operating shaft.

3. The brake assembly of claim 2 wherein the sensor assembly is a magnetic flux sensor that detects the magnetic emitter.

4. The brake assembly of claim 3 wherein the magnetic flux sensor is spaced apart from and disposed below the operating shaft axis.

5. The brake assembly of claim 1 wherein the position feature is spaced apart from the operating shaft axis.

6. The brake assembly of claim 1 wherein the sensor assembly provides a signal indicative of an actuation distance of the brake pad assembly from the retracted position to the extended position.

7. A brake assembly comprising:
a housing assembly provided with a piston assembly;
an operating shaft that is disposed proximate the housing assembly and that has a position feature, wherein the operating shaft is configured to rotate about an operating shaft axis to actuate the piston assembly and translate a brake pad assembly from a retracted position to an extended position;
an adjuster mechanism operatively coupled to the piston assembly and configured to change the extended position in response to rotation of the operating shaft;
a slide pin assembly upon which the housing assembly translates when the piston assembly is actuated; and
a sensor assembly disposed proximate the housing assembly, the sensor assembly having a first sensor that detects a position of the adjuster mechanism, a second sensor that detects a position of the slide pin assembly, and a third sensor that detects a position of the position feature and a change in the extended position, wherein the first, second and third sensors are received in a housing and the third sensor is disposed in the housing opposite the first sensor.

8. The brake assembly of claim 7 wherein the sensor assembly provides a third signal indicative of rotation of the operating shaft based on the position of the position feature.

9. The brake assembly of claim 8 wherein a warning is provided when rotation of the operating shaft exceeds a third threshold and the change in the extended position is less than a first threshold.

10. The brake assembly of claim 7 wherein the position feature is disposed proximate an end surface of the operating shaft and is spaced apart from the operating shaft axis.

11. The brake assembly of claim 7 wherein the sensor assembly is spaced apart from the operating shaft and disposed below the operating shaft axis.

Assignees

• Arvinmeritor Technology Llc

Inventors

• Philpott Daniel

Classifications

• F16D66/027

  Sensors therefor · CPC title

• F16D55/225

  the braking members being brake pads · CPC title

• F16D2055/0016

  Brake calipers · CPC title

• F16D2125/06

  Pistons · CPC title

• F16D65/0068 Primary

  Brake calipers · CPC title