Vibration prevention device

Patent metadata

Field	Value
Publication number	US-9816581-B2
Application number	US-201414900868-A
Country	US
Kind code	B2
Filing date	Jul 14, 2014
Priority date	Jul 25, 2013
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A partition member ( 16 ) is provided with a whirl chamber unit ( 31 a, 31 b ) that causes two liquid chambers to communicate with each other, the whirl chamber unit ( 31 a, 31 b ) includes a whirl chamber ( 33 a, 33 b ) that whirls a liquid flowing therein, a rectification passage ( 34 a, 34 b ) that causes one liquid chamber to communicate with the whirl chamber ( 33 a, 33 b ) and that is opened in the whirl chamber ( 33 a, 33 b ) in a circumferential direction of the whirl chamber ( 33 a, 33 b ), and a communication hole ( 32 a, 32 b ) that causes the other liquid chamber to communicate with the whirl chamber ( 33 a, 33 b ). The whirl chamber ( 33 a, 33 b ) forms a whirl flow of a liquid depending on a flow rate of the liquid flowing from the rectification passage ( 34 a, 34 b ) and causes the liquid to flow from the communication hole ( 32 a, 32 b ). The whirl chamber unit ( 31 a, 31 b ) includes a plurality of first whirl chamber units ( 31 a ) in which a first whirl chamber ( 33 a ) as the whirl chamber communicates with the first liquid chamber ( 14 ) via a first rectification passage ( 34 a ) as the rectification passage and communicates with the second liquid chamber ( 15 ) via a first communication hole ( 32 a ) as the communication hole. The vibration prevention device ( 10 ) can exhibit damping characteristics with high accuracy.

First claim

The invention claimed is:

1. A vibration prevention device comprising:
a first attachment member having a tubular shape that is connected to one of a vibration source and a vibration receiver and a second attachment member that is connected to the other thereof;
an elastic body that connects two attachment members; and
a partition member that partitions a liquid chamber in the first attachment member having a liquid enclosed therein into a first liquid chamber and a second liquid chamber,
at least one of the first liquid chamber and the second liquid chamber having the elastic body as a part of a wall surface thereof,
wherein the partition member is provided with a whirl chamber unit that causes the two liquid chambers to communicate with each other,
the whirl chamber unit includes
a whirl chamber that whirls a liquid flowing therein,
a rectification passage that causes one liquid chamber of the two liquid chambers to communicate with the whirl chamber and that is opened in the whirl chamber in a circumferential direction of the whirl chamber, and
a communication hole that causes the other liquid chamber of the two liquid chambers to communicate with the whirl chamber,

the whirl chamber forms a whirl flow of the liquid depending on a flow rate of the liquid flowing from the rectification passage and causes the liquid to flow from the communication hole,
the whirl chamber unit includes a plurality of first whirl chamber units in which a first whirl chamber as the whirl chamber communicates with the first liquid chamber via a first rectification passage as the rectification passage and communicates with the second liquid chamber via a first communication hole as the communication hole,
the partition member partitions the liquid chamber in an axial direction of the first attachment member, and
an axis of the whirl chamber extends along an intersection plane intersecting the axis of the first attachment member.

2. The vibration prevention device according to claim 1 , wherein the partition member is provided with a limiting passage that causes the two liquid chambers to communicate with each other and of which a resonance frequency is set to be equal to a first vibration frequency, and
a resonance frequency of the rectification passage is set to be equal to a second vibration frequency higher than the first vibration frequency.

3. The vibration prevention device according to claim 1 , wherein the axis of the whirl chamber extends in a circumferential direction of the first attachment member, and
a plurality of the whirl chamber units are arranged in the circumferential direction of the first attachment member.

4. The vibration prevention device according to claim 1 , wherein the partition member is provided with a whirl chamber member having the whirl chamber unit formed therein,
the whirl chamber member is divided in the axial direction of the first attachment member by a dividing plane extending to intersect the axis of the first attachment member,
the dividing plane divides the whirl chambers of all the whirl chamber units in the axial direction of the first attachment member, and
the rectification passage extends in the axial direction of the first attachment member and is opened on an end face of the partition member facing the outside in the axial direction of the first attachment member.

5. The vibration prevention device according to claim 1 , wherein the communication hole is opened into the whirl chamber from an end face of a wall surface of the whirl chamber facing an axial direction of the whirl chamber.

6. The vibration prevention device according to claim 5 , wherein the communication hole is disposed coaxial with the axis of the whirl chamber.

7. The vibration prevention device according to claim 1 , wherein the whirl chamber unit includes a plurality of second whirl chamber units in which a second whirl chamber as the whirl chamber communicates with the second liquid chamber via a second rectification passage as the rectification passage and communicates with the first liquid chamber via a second communication hole as the communication hole.

Assignees

• Bridgestone Corp

Inventors

• Ueki Akira

Classifications

• F16F13/107 Primary

  Passage design between working chambers · CPC title

• F16F2222/12

  Fluid damping · CPC title

• B60K5/1208

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