Anti-vibration device
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.
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.