Anti-vibration device

Patent metadata

Field	Value
Publication number	US-10502279-B2
Application number	US-201615753550-A
Country	US
Kind code	B2
Filing date	Aug 3, 2016
Priority date	Aug 21, 2015
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

An anti-vibration device includes: a cylinder body coupled to a vibration receiver; a support body coupled to a vibration source; an elastic body that attaches the support body to the cylinder body such that the support body is capable of moving relative to the cylinder body; a first liquid chamber sectioned by an orifice pathway and the elastic body; a second liquid chamber that a liquid flows to and from the first liquid chamber through the orifice pathway; a first gas chamber with a wall configured by a diaphragm; a second gas chamber capable of communicating with the first gas chamber; and a switching section that switches a state of communication of the first gas chamber and the second gas chamber.

First claim

The invention claimed is:

1. An anti-vibration device comprising:
a cylinder body coupled to one of a vibration source or a vibration receiver;
a support body coupled to the other of the vibration source or the vibration receiver;
an elastic body attaching the support body to the cylinder body such that the support body is capable of moving relative to the cylinder body;
a first liquid chamber housing a liquid and provided between the elastic body and a pathway member that is formed within the cylinder body;
a second liquid chamber provided between the pathway member and a diaphragm that partitions an interior of the cylinder body, a liquid flowing between the first liquid chamber and the second liquid chamber through a pathway that is formed by the pathway member;
a first gas chamber provided on an opposite side of the diaphragm from the second liquid chamber;
a second gas chamber isolated from the first gas chamber; and
a switching section switching between a state of communication and a state of non-communication between the first gas chamber and the second gas chamber,
wherein the diaphragm does not configure a wall of the second gas chamber, and the second gas chamber is only communicable with the first gas chamber.

2. The anti-vibration device of claim 1 , wherein a capacity of the second gas chamber is greater than a capacity of the first gas chamber.

3. An anti-vibration device comprising:
a cylinder body coupled to one of a vibration source or a vibration receiver;
a support body coupled to the other of the vibration source or the vibration receiver;
an elastic body attaching the support body to the cylinder body such that the support body is capable of moving relative to the cylinder body;
a first liquid chamber housing a liquid and provided between the elastic body and a first membrane that partitions an interior of the cylinder body;
a first gas chamber provided between the first membrane and a first partitioning wall of a pathway member that partitions the interior of the cylinder body;
a second liquid chamber provided between the first partitioning wall and a second membrane that partitions the interior of the cylinder body, a liquid flowing between the first liquid chamber and the second liquid chamber through a pathway formed by the pathway member;
a deformation space provided between the second membrane and a second partitioning wall that partitions the interior of the cylinder body, the deformation space forming a deformable region where the second membrane deforms;
a second gas chamber isolated from the first gas chamber; and
a switching section switching between a state of communication and a state of non-communication between the first gas chamber and the second gas chamber,
wherein the second membrane does not configure a wall of the second gas chamber.

4. The anti-vibration device of claim 3 , wherein:
the first gas chamber is in communication with the second gas chamber through the deformation space; and
the switching section switches between the state of communication and the state of non-communication between the first gas chamber and the second gas chamber through the deformation space.

5. The anti-vibration device of claim 3 , wherein a capacity of the second gas chamber is greater than a capacity of the deformation space, and the capacity of the deformation space is greater than a capacity of the first gas chamber.

6. The anti-vibration device of claim 4 , wherein a capacity of the second gas chamber is greater than a capacity of the deformation space, and the capacity of the deformation space is greater than a capacity of the first gas chamber.

Assignees

• Bridgestone Corp

Inventors

• Kojima Hiroshi

Classifications

• F16F13/268

  comprising means for acting dynamically on the walls bounding an equilibration chamber (F16F13/264 take precedence) · CPC title

• F16F13/20

  characterised by comprising also a pneumatic spring (F16F13/22, {F16F13/26} take precedence) · CPC title

• F16F13/102 Primary

  characterised by features of flexible walls of equilibration chambers; decoupling or self-tuning means · CPC title

• F16F13/10 Primary

  the wall being at least in part formed by a flexible membrane or the like (F16F13/14 - F16F13/18 take precedence) · CPC title

• F16F13/26

  characterised by adjusting or regulating devices responsive to exterior conditions {(F16F13/101 takes precedence)} · CPC title