Composite vibration-damping body and metal-spring-equipped composite vibration-damping body using the same

Patent metadata

Field	Value
Publication number	US-11067146-B2
Application number	US-201916536987-A
Country	US
Kind code	B2
Filing date	Aug 9, 2019
Priority date	Nov 28, 2017
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A composite vibration-damping body including a first elastic body and a second elastic body overlapped with each other, wherein the first elastic body is formed of a material having higher attenuation than that of the second elastic body, the first elastic body includes a recessed part opening onto a surface of the first elastic body, and the recessed part forms a gap, and a strain concentration part configured to be subjected to an increased strain during load input is set to a wall of the gap of the of the first elastic body.

First claim

What is claimed is:

1. A composite vibration-damping body comprising a first elastic body and a second elastic body overlapped with each other, wherein
the first elastic body is formed of a material having higher attenuation than that of the second elastic body,
the first elastic body includes a recessed part opening onto a surface of the first elastic body, and the recessed part forms a gap, and
a strain concentration part configured to be subjected to an increased strain during load input is set to a wall of the gap of the first elastic body, wherein
the recessed part opens onto an overlapped face of the first elastic body with the second elastic body,
the second elastic body includes a convex part inserted in the recessed part,
the convex part is partially in contact with an inner face of the recessed part, and
the gap is formed between the convex part and the inner face of the recessed part.

2. The composite vibration-damping body according to claim 1 , wherein the recessed part of the first elastic body has a groove shape.

3. The composite vibration-damping body according to claim 1 , wherein the recessed part of the first elastic body opens to a lateral side with respect to a direction of load input.

4. The composite vibration-damping body according to claim 1 , wherein the first elastic body and the second elastic body are overlapped in a direction of load input.

5. The composite vibration-damping body according to claim 4 , wherein the first elastic body includes a protruding part provided on the overlapped face with the second elastic body and protruding toward the second elastic body, and the recessed part is formed on an outer circumference of the protruding part.

6. The composite vibration-damping body according to claim 5 , wherein a protruding distal end face of the protruding part is in contact with the second elastic body, and the first elastic body and the second elastic body are in contact with each other in a direction of protrusion of the protruding part at a position away from the protruding part to a radial outside.

7. The composite vibration-damping body according to claim 1 , wherein the second elastic body is formed of a material having a smaller compression set than that of the first elastic body.

8. A metal-spring-equipped composite vibration-damping body comprising:
the composite vibration-damping body according to claim 1 ; and
a metal spring provided to the composite vibration-damping body in series in a direction of load input.

9. The metal-spring-equipped composite vibration-damping body according to claim 8 , wherein the metal spring includes an attachment part to a component to be damped.

10. A metal-spring-equipped composite vibration-damping body comprising:
a composite vibration-damping body comprising a first elastic body and a second elastic body overlapped with each other, wherein
the first elastic body is formed of a material having higher attenuation than that of the second elastic body,
the first elastic body includes a recessed part opening onto a surface of the first elastic body, and the recessed part forms a gap, and
a strain concentration part configured to be subjected to an increased strain during load input is set to a wall of the gap of the first elastic body; and

a metal spring provided to the composite vibration-damping body in series in a direction of load input, wherein
the metal spring comprises a plate spring which is folded at a bent part.

Assignees

• Sumitomo Riko Co Ltd

Inventors

• Ohji Akira

Classifications

• F16F3/093 Primary

  the springs being of different materials, e.g. having different types of rubber {(F16F1/3835 takes precedence)} · CPC title

• E05Y2900/531

  Doors · CPC title

• F16F3/0935 Primary

  and being of the same shape · CPC title

• E05F7/04

  Arrangements affording protection against rattling (with buffering action E05F5/00) · CPC title

• E05Y2201/224

  Stops · CPC title