Isolator

Patent metadata

Field	Value
Publication number	US-11624434-B2
Application number	US-201916441985-A
Country	US
Kind code	B2
Filing date	Jun 14, 2019
Priority date	Jun 14, 2019
Publication date	Apr 11, 2023
Grant date	Apr 11, 2023

Abstract

An isolator comprising a pulley having a pulley stop, a plate attached to the pulley, a shaft, the pulley journalled to the shaft, a torsion spring attached to the shaft, a damping member attached to the torsion spring, the damping member disposed between the plate and the pulley, and the damping member compressing a damping fluid against the pulley stop.

First claim

We claim:

1. An isolator comprising:
a pulley having a first and second pulley stops;
a plate attached to the pulley;
a shaft;
the pulley j ournalled to the shaft;
a torsion spring attached to the shaft; and
a damping member attached to the torsion spring, the damping member disposed between the plate and the pulley,
wherein the damping member comprises a ring comprising two radial extensions, wherein the radial extensions are disposed between the pulley stops, and the pulley comprises a receiver, wherein the each damping member radial extension is engaged with the receiver and is rotatable through the receiver in a first direction until it hits the first pulley stop and in a second direction until it hits the second pulley stop compressing a damping fluid against the first and second pulley stops.

2. The isolator as in claim 1 , wherein the plate is attached to the pulley by a weld.

3. The isolator as in claim 1 , wherein the torsion spring is attached to the shaft by a weld.

4. The isolator as in claim 1 , wherein the damping member is attached to the torsion spring by a weld.

5. The isolator as in claim 1 , wherein the damping fluid comprises grease.

6. The isolator as in claim 1 , wherein the pulley is further journalled to the shaft with a bushing, the bushing engaged with the plate.

7. The isolator as in claim 1 further comprising an attaching screw cooperating with the shaft.

8. The isolator as in claim 1 , wherein the damping member comprises a relief to allow a damping fluid flow.

9. The isolator as in claim 1 , wherein the viscosity of the damping fluid is in the range of 68 cSt at 40 degC to 3000 cSt at 40 degC.

10. The isolator as in claim 1 further comprising a dust cap engaged with the plate.

11. An isolator comprising:
a pulley having a first and second pulley stops;
a shaft;
the pulley j ournalled to the shaft;
a torsion spring attached to the shaft; and
a damping member attached to the torsion spring, wherein the damping member comprises a ring comprising two radial extensions, wherein the radial extensions are disposed between the pulley stops, and the pulley comprises a receiver, wherein the each damping member radial extension is engaged with the receiver and is rotatable through the receiver in a first direction until it hits the first pulley stop and in a second direction until it hits the second pulley stop compressing a damping fluid against the first and second pulley stops.

12. The isolator as in claim 11 , wherein the viscosity of the damping fluid is in the range of 68 cSt at 40 degC to 3000 cSt at 40 degC.

13. An isolator comprising:
a pulley having a first and second pulley stops;
a shaft;
the pulley j ournalled to the shaft;
a torsion spring attached to the shaft;
a damping member attached to the torsion spring, wherein the damping member comprises a ring comprising two radial extensions, wherein the radial extensions are disposed between the pulley stops, and the pulley comprises a receiver, wherein the each damping member radial extension is engaged with the receiver and is rotatable through the receiver in a first direction until it hits the first pulley stop and in a second direction until it hits the second pulley stop compressing a damping fluid against the first and second pulley stops, the viscosity of the damping fluid in the range of 68 cSt at 40 degC to 3000 cSt at 40 degC; and
a cover member attached to the pulley enclosing the receiver.

Assignees

• Gates Corp

Inventors

• Mora Anthony R
• Serkh Alexander
• Liu Keming
• Chen Xiaohua Joe

Classifications

• F16F2222/12

  Fluid damping · CPC title

• F16F9/145

  involving only rotary movement of the effective parts (wing closers or openers with fluid brakes of the rotary type E05F3/14) · CPC title

• F16H2055/366

  with means providing resilience or vibration damping · CPC title

• F16F15/16

  using a fluid {or pasty material}(F16F9/53, F16F15/13157 take precedence; devices connecting input and output members F16D) · CPC title

• F16F2224/04

  Fluids · CPC title