Patent ID: 8302946

Claim:
A vibration proofing apparatus comprising: a first mounting member coupled to one of a vibration generating portion and a vibration receiving portion, and formed in an approximately tubular shape; a second mounting member coupled to the other of the vibration generating portion and the vibration receiving portion, and arranged in an inner peripheral side of the first mounting member; a rubber elastic body arranged between the first mounting member and the second mounting member, and elastically coupling the first mounting member and the second mounting member; a first pressure receiving liquid chamber arranged at an axial end of the second mounting member, and in an inner peripheral side of the first mounting member, and in which at least a part of an inner wall is formed by the elastic body, and a liquid is filled; an auxiliary liquid chamber in which the liquid is filled, a part of a partition wall is formed by a diaphragm and an internal volume is capable of being expanded and contracted in correspondence to a liquid pressure change; a first limit passage communicating the first pressure receiving liquid chamber and the auxiliary liquid chamber with each other so as to make the liquid circulatable; a second pressure receiving liquid chamber arranged between the first mounting member and the second mounting member, and in which at least a part of an inner wall is formed by the elastic body, and the liquid is filled; a second limit passage communicating the second pressure receiving liquid chamber and the auxiliary liquid chamber with each other so as to make the liquid circulatable; and a partition member arranged in an inner peripheral side of the first mounting member, the partition member comparting the first pressure receiving liquid chamber and the auxiliary liquid chamber, and the second pressure receiving liquid chamber and the auxiliary liquid chamber; wherein the rubber elastic body comparts the first pressure receiving liquid chamber and the second pressure receiving liquid chamber.