Patent attributes
An anti-vibration device (1) of the present invention includes a cylindrical first attaching member (11) and a second attaching member (12), an elastic body (13), and a partition member (17) which is configured to partition a liquid chamber (14) in the first attaching member into a main liquid chamber (15) and an auxiliary liquid chamber (16). The partition member includes a membrane (31) that forms a part of the partition wall of the main liquid chamber, and an intermediate chamber (35) which is located on a side opposite to the main liquid chamber with the membrane therebetween and has a membrane as a part of a partition wall of the main liquid chamber. In the partition member, a first orifice (21) through which the main liquid chamber and the auxiliary liquid chamber communicate with each other, and a second orifice (22) through which the intermediate chamber and the auxiliary liquid chamber communicate with each other, and a common opening (16a) which forms an opening on the auxiliary liquid chamber side of each of the first orifice (21) and the second orifice (22) are formed.
