Vibration-damping device

Patent metadata

Field	Value
Publication number	US-11167632-B2
Application number	US-201816214811-A
Country	US
Kind code	B2
Filing date	Dec 10, 2018
Priority date	Dec 22, 2017
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

Abstract

A vibration-damping device including: a first mounting member configured to be mounted to one of components of a vibration transmission system; a second mounting member configured to be mounted to an other of the components of the vibration transmission system; a main rubber elastic body connecting the first mounting member and the second mounting member elastically to each other; a bracket attached to the second mounting member, the bracket having a mounting part configured to be mounted to the other of the components of the vibration transmission system; a tubular outer member secured press-fit to the second mounting member; a mass member disposed within the tubular outer member; and a support rubber fixed at an outer peripheral part of the mass member, the support rubber elastically connecting the tubular outer member and the mass member to constitute a dynamic damper.

First claim

What is claimed is:

1. A vibration-damping device comprising:
a first mounting member configured to be mounted to one of components of a vibration transmission system;
a second mounting member configured to be mounted to an other of the components of the vibration transmission system;
a main rubber elastic body connecting the first mounting member and the second mounting member elastically to each other;
a bracket attached to the second mounting member, the bracket having a mounting part configured to be mounted to the other of the components of the vibration transmission system;
a tubular outer member secured press-fit to the second mounting member;
a mass member disposed within the tubular outer member; and
a support rubber fixed at an outer peripheral part of the mass member, the support rubber elastically connecting the tubular outer member and the mass member to constitute a dynamic damper,
wherein the tubular outer member opens to opposite axial sides, and an end of one axial opening of the tubular outer member is secured press-fit to the second mounting member, while the mass member is exposed to an outside from the tubular outer member via an other axial opening of the tubular outer member.

2. The vibration-damping device according to claim 1 , wherein an end of the other axial opening of the tubular outer member includes a reinforcement part bent to a radial inside.

3. The vibration-damping device according to claim 2 , wherein the support rubber is fixed to the reinforcement part of the tubular outer member.

4. The vibration-damping device according to claim 1 , wherein the tubular outer member has a step part provided at an axially middle part thereof.

5. A vibration-damping device comprising:
a first mounting member configured to be mounted to one of components of a vibration transmission system;
a second mounting member configured to be mounted to an other of the components of the vibration transmission system;
a main rubber elastic body connecting the first mounting member and the second mounting member elastically to each other;
a bracket attached to the second mounting member, the bracket having a mounting part configured to be mounted to the other of the components of the vibration transmission system;
a tubular outer member secured press-fit to the second mounting member;
a mass member disposed within the tubular outer member; and
a support rubber fixed at an outer peripheral part of the mass member, the support rubber elastically connecting the tubular outer member and the mass member to constitute a dynamic damper, wherein the tubular outer member opens to a lower side, while a detent projection is provided projecting to a radial inside at an opening of the tubular outer member on the lower side so that the detent projection constitutes a fail-safe structure avoiding the mass member from becoming dislodged out of the tubular outer member to the lower side.

6. The vibration-damping device according to claim 1 , wherein
the second mounting member has a tubular shape, and one axial side opening of the second mounting member is closed by the main rubber elastic body, while an other axial side opening of the second mounting member is closed by a flexible film, and a pressure-receiving chamber whose wall is partially constituted by the main rubber elastic body and an equilibrium chamber whose wall is partially constituted by the flexible film are formed between the main rubber elastic body and the flexible film, and
the tubular outer member secured press-fit to the second mounting member extends out to an axial outside, while the mass member is disposed on the axial outside relative to the flexible film, and the tubular outer member and the mass member are elastically connected by the support rubber, while a communication hole opening a space formed axially between the flexible film and the mass member to an atmosphere is formed in at least one of the tubular outer member, the mass member, and the support rubber.

7. The vibration-damping device according to claim 6 , wherein the mass member is disposed on a lower side relative to the flexible film, while a covering rubber covering an upper face of the mass member is formed integrally with the support rubber.

8. The vibration-damping device according to claim 7 , wherein a material injection part in molding the support rubber and the covering rubber is provided in the covering rubber.

9. The vibration-damping device according to claim 8 , wherein the material injection part protrudes at a position closer to an outer peripheral end than to a center in the upper face of the mass member, while a thickness dimension of the covering rubber is made partially larger to form a material guide part that extends from the material injection part to the support rubber.

10. The vibration-damping device according to claim 6 , wherein the mass member is disposed on a lower side relative to the flexible film, and the communication hole opens in an upper face of the mass member, while the upper face of the mass member includes a tapered face that inclines downward toward an opening of the communication hole.

11. The vibration-damping device according to claim 6 , wherein the mass member is disposed on a lower side relative to the flexible film, and the communication hole opens in an upper face of the support rubber.

12. The vibration-damping device according to claim 1 , wherein the bracket has an attachment tube part secured press-fit to the second mounting member.

Assignees

• Sumitomo Riko Co Ltd
• Toyota Motor Co Ltd

Inventors

• Yasuda Takayoshi
• Watanabe Yoshinori
• Furumachi Naoki
• Hatanaka Keishi
• Ichikawa Hiroyuki
• Matsubara Yuji
• Mori Kentaro

Classifications

• F16F2224/025

  Elastomers · CPC title

• B60K5/1208

  Resilient supports (B60K5/1241 - B60K5/1291 take precedence) · CPC title

• F16F15/022

  using dampers and springs in combination · CPC title

• F16F13/22 Primary

  characterised by comprising also a dynamic damper (dampers using inertia effect per se F16F7/10) · CPC title

• F16F2230/0005

  Attachment, e.g. to facilitate mounting onto confer adjustability · CPC title