Brake assembly having a retraction spring and method of assembly

Patent metadata

Field	Value
Publication number	US-2020355232-A1
Application number	US-201916407395-A
Country	US
Kind code	A1
Filing date	May 9, 2019
Priority date	May 9, 2019
Publication date	Nov 12, 2020
Grant date	—

Abstract

A brake assembly having a retraction spring and a method of assembly. The retraction spring may extend between first and second brake pad assemblies. The retraction spring may include a coil and, may have an end or tip that may be received in a hole in a backplate of a. brake'pad assembly.

First claim

What is claimed is:

1 . A brake assembly comprising:
a first brake pad assembly that includes:
a friction material having a first lateral side, a second lateral side that is disposed opposite the first lateral side, an upper side that extends from the first lateral side toward the second lateral side, and a back side that extends between the first lateral side and the second lateral side; and
a first backplate having a first lateral backplate side, a second lateral backplate side disposed opposite the first lateral bookplate side, a first backplate face that engages the back side of the friction material and extends from the first lateral backplate side to the second lateral backplate side, and a first hole that extends from the first backplate face and is positioned along a lateral axis between the first lateral side and the first lateral backplate side and is positioned along a longitudinal axis below the upper side of the friction material, wherein the longitudinal axis is disposed perpendicular to the lateral axis; and
a retraction spring that is partially received in the first hole.

2 . The brake assembly of claim 1 wherein the first backplate has an upper backplate side and a lower backplate side that is disposed opposite the upper backplate side, wherein the first hole is disposed closer to the lower backplate side than the upper backplate side.

3 . The brake assembly of claim 2 wherein the upper side of the friction material and the upper backplate side of the backplate face away from a lower side of the friction material and the lower backplate side, and the first hole is completely disposed between the upper side and the lower side of the friction material.

4 . The brake assembly of claim 3 wherein the first hole is disposed closer to the lower side of the friction material than to the upper side of the friction material.

5 . The brake assembly of claim I wherein the first hole is disposed closer to the first lateral side of the friction material than to the first lateral backplate side.

6 . The brake assembly of claim t wherein the retraction spring has a coil, a first upper biasing arm that extends from the coil, a first lower biasing, arm that extends at a first angle from an end of the first upper biasing arm, and a tip that extends at a second angle from an end of the first lower biasing arm, wherein the tip is received in the first hole.

7 . The brake assembly of claim 6 wherein the first lower biasing arm is loner than the first upper biasing arm.

8 . The brake assembly of claim 6 wherein the retraction spring has a second upper biasing arm that extends from the coil toward a second brake pad assembly, a second lower biasing arm that extends at an angle from an end of the second upper biasing arm, and a second lip that extends at an angle from an end of the second lower biasing arm, wherein the second tip is received in a hole in the second brake pad assembly.

9 . The brake assembly of claim 8 wherein the second brake pad assembly has a second friction material disposed on a second backplate, wherein the first backplate of the first brake pad assembly and the second backplate of the second brake pad assembly each have a lower backplate side that contacts a brake carrier, wherein the coil biases the first and second upper biasing arms toward the first and second bookplates, respectively, and the first lower biasing arm and the second lower biasing arms urge the lower backplate side of the first backplate and the lower backplate side of the second backplate away from each other.

10 . A brake assembly comprising:
a first brake pad assembly that includes:
a friction material having a first lateral side, a second lateral side that is disposed opposite the first lateral side, an upper side that extends from the first lateral side toward the second lateral side, a lower side that is disposed opposite the upper side and extends from the first lateral side toward the second lateral side, and a back side that extends between the first lateral side and the second lateral side; and
a first backplate having a first lateral backplate side, a second lateral backplate side disposed opposite the first lateral backplate side, a first backplate face that engages the back side of the friction material and extends from the first lateral backplate side to the second lateral backplate side, and a first hole that extends from the first backplate face and is positioned laterally outboard with respect to the first lateral backplate side and is positioned laterally inboard with respect to the first lateral side; and
a retraction spring may be partially received in the first hole.

11 . The brake assembly of claim 10 wherein the first backplate has a second backplate face that is disposed opposite the first backplate face, wherein the first hole is disposed at an oblique angle with respect to the first backplate face and the second backplate face.

12 . The brake assembly of claim 11 wherein the first hole is disposed at an angle with respect to the first backplate thee and the second backplate face such that an opening of the first hole in the first backplate face is disposed further from the first lateral backplate side than an opening of the first hole in the second backplate face.

13 . The brake assembly of claim 11 wherein the first backplate has an upper backplate side and a lower backplate side that is disposed opposite the upper backplate side, wherein the first hole is disposed closer to the upper backplate side than the lower backplate side.

14 . The brake assembly of claim 13 wherein a tab extends from the upper backplate side in a direction that extends away from the lower backplate side, the tab is laterally positioned between the first lateral backplate side and the first lateral side and the first hole is positioned in the tab.

15 . The brake assembly of claim 10 wherein the retraction spring has a coil that extends around a center axis, a first biasing arm that extends from the coil, and a first biasing tip that extends from an end of the first biasing arm, wherein, the first biasing arm is disposed substantially parallel to a center plane that is disposed perpendicular to the center axis and the first biasing tip is disposed at an oblique angle with respect to the first biasing arm and the center plane.

16 . The brake assembly of claim 15 wherein the retraction spring has a second biasing arm that extends from the coil toward a second brake pad assembly and a second biasing tip that extends from an end of the second biasing arm and is disposed at an oblique angle with respect to the second biasing arm and the center plane;
the first biasing tip is received in the first hole of the first brake pad assembly;
the second biasing tip is received in a second hole in a second backplate of the second brake pad assembly:
the first and second backplates have first and second lower backplate sides, respectively, that face away from the retraction spring; and
the first and second biasing tips exert a biasing force on the first and second brake pad assemblies, respectively, that rotates the lower backplate side of the first backplate and the lower backplate side of the second backplate away from each other.

17 . The brake assembly of claim 10 wherein the retraction spring includes:
a first coil;
first and second biasing arms that extend from the first coil;
a first tip that extends from an end of the first biasing arm and is received in the first hole; and
a second tip that extends from an end of a second biasing arm and is received in

Assignees

• Arvinmeritor Technology Llc

Inventors

• Adkins Alex
• Leicht Phil
• Philpott Daniel
• Sakhare Sukrut
• Polmear Chris

Classifications

• F16D65/092 Primary

  for axially-engaging brakes, e.g. disc brakes · CPC title

• F16D65/0975

  Springs made from wire · CPC title

• F16D65/0043

  Brake maintenance and assembly, tools therefor · CPC title

• F16D65/0068

  Brake calipers · CPC title

• F16D65/68 Primary

  with eccentric or helical body · CPC title