Brake pad retracting device

Patent metadata

Field	Value
Publication number	US-11548484-B2
Application number	US-202117176735-A
Country	US
Kind code	B2
Filing date	Feb 16, 2021
Priority date	Feb 16, 2021
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A brake pad retracting device is disclosed. An example vehicle braking system comprising a rotor, and a caliper including a brake pad slidably engaged with a guide pin, and a coil spring through which the guide pin extends, the coil spring having a first end and a second end, the first end having a first inner diameter sized to enable the first end to move freely over a surface of the guide pin, the first end to engage the brake pad to urge the brake pad away from the rotor, and the second end having a second inner diameter sized to frictionally engage the surface of the guide pin, the first inner diameter greater than the second inner diameter.

First claim

What is claimed is:

1. A vehicle braking system comprising:
a rotor; and
a caliper including:
a brake pad slidably engaged with a guide pin; and
a coil spring through which the guide pin extends, the coil spring having a first end and a second end, the first end having a first inner diameter sized to enable the first end to move freely over a surface of the guide pin, the first end to engage the brake pad to urge the brake pad away from the rotor, and the second end having a second inner diameter sized to frictionally engage the surface of the guide pin, the first inner diameter greater than the second inner diameter.

2. The vehicle braking system of claim 1 , wherein the first end of the coil spring is coupled to a backplate of the brake pad.

3. The vehicle braking system of claim 1 , wherein the second end of the coil spring is coupled to an anti-rattle clip of the caliper.

4. The vehicle braking system of claim 1 , wherein the frictional engagement between the second end and the surface of the guide pin is to prevent the second end from moving along the guide pin while a force applied by the first end to urge the brake pad away from the rotor does not exceed a threshold.

5. The vehicle braking system of claim 4 , wherein, in response to the force applied by first end exceeding the threshold, the second end moves over the surface of the guide pin towards the rotor to adjust a clearance between the brake pad and the rotor.

6. The vehicle braking system of claim 1 , wherein the coil spring is a first coil spring, and the caliper further includes a second coil spring through which the guide pin extends, the first coil spring and second coil spring located on opposite ends of the guide pin, the second coil spring having a third end and a fourth end, the third end having the first inner diameter, and the fourth end having the second inner diameter.

7. The vehicle braking system of claim 6 , wherein the third end is to engage a second brake pad to urge the second brake pad away from the rotor, and the fourth end is to apply a frictional engagement to provide resistance to a force applied by the third end to urge the second brake pad away from the rotor.

8. A brake caliper comprising:
a brake pad slidably engaged with a guide pin; and
a coil spring through which the guide pin extends, the coil spring having a first end and a second end, the first end having a first inner diameter sized to enable the first end to move freely over a surface of the guide pin, the first end to engage the brake pad to urge the brake pad away from a rotor, and the second end having a second inner diameter sized to frictionally engage the surface of the guide pin, the first inner diameter greater than the second inner diameter.

9. The brake caliper of claim 8 , wherein the first end of the coil spring is coupled to a backplate of the brake pad.

10. The brake caliper of claim 8 , wherein the second end of the coil spring is coupled to an anti-rattle clip of the brake caliper.

11. The brake caliper of claim 8 , wherein the second end is to apply a frictional engagement to provide resistance to a force applied by the first end to urge the brake pad away from the rotor.

12. The brake caliper of claim 11 , wherein, in response to the force applied by first end exceeding a threshold, the second end moves over the surface of the guide pin towards the rotor to reduce a compression of the first end.

13. The brake caliper of claim 12 , wherein the second end reduces the compression of the first end to reduce a clearance between the brake pad and the rotor.

14. The brake caliper of claim 8 , wherein the coil spring is a first coil spring, and the brake caliper further includes a second coil spring through which the guide pin extends, the first coil spring and second coil spring located on opposite ends of the guide pin, the second coil spring having a third end and a fourth end, the third end having the first inner diameter, and the fourth end having the second inner diameter.

15. A brake pad retracting device comprising:
a coil spring through which a guide pin extends, the coil spring including:
a first end to engage a brake pad to urge the brake pad away from a rotor, the first end having a first inner diameter sized to enable the first end to move freely over a surface of the guide pin; and
a second end having a second inner diameter sized to frictionally engage the surface of the guide pin, the first inner diameter greater than the second inner diameter.

16. The brake pad retracting device of claim 15 , wherein the first end of the coil spring is coupled to a backplate of the brake pad.

17. The brake pad retracting device of claim 15 , wherein the second end of the coil spring is coupled to an anti-rattle clip of a caliper.

18. The brake pad retracting device of claim 15 , wherein the second end is to apply a frictional engagement to provide resistance to a force applied by the first end to urge the brake pad away from the rotor.

19. The brake pad retracting device of claim 18 , wherein, in response to the force applied by first end exceeding a threshold, the second end moves over the surface of the guide pin towards the rotor to reduce a compression of the first end.

20. The brake pad retracting device of claim 19 , wherein the second end reduces the compression of the first end to reduce a clearance between the brake pad and the rotor.

Assignees

• Ford Global Tech Llc

Inventors

• Karpenko Yuri Anatoly
• Howell Joshua
• Oakwood J Chris
• Evans Charles K

Classifications

• F16D65/0973

  not subjected to brake forces · CPC title

• F16D65/0087

  Brake housing guide members, e.g. caliper pins; Accessories therefor, e.g. dust boots · CPC title

• F16D55/228 Primary

  with a separate actuating member for each side · CPC title

• B60T1/065 Primary

  employing disc (B60T1/062 takes precedence) · CPC title

• F16D65/0979

  acting on the rear side of the pad or an element affixed thereto, e.g. spring clips securing the pad to the brake piston or caliper · CPC title