Patent ID: 9534655
Date: 2017-01-03
CPC Classifications: F16F

Claim:
1. A vibration damping device, comprising: a cylindrical first attachment member that is joined to one of a vibration generating unit and a vibration receiving unit, and a second attachment member that is joined to the other; and an elastic body that joins the attachment members, wherein the elastic body comprises: an annular first elastic body and an annular second elastic body that are spaced from each other in an axial direction, a liquid chamber in which liquid is enclosed is formed between the elastic bodies, and a plurality of elastic division walls that divide the liquid chamber into a plurality of pressure receiving liquid chambers are arranged in a circumferentially spaced manner, the pressure receiving liquid chambers being in communication with one another through a restriction passage, the elastic division wall is joined to the first elastic body, and is also in abutment with the second elastic body, the second attachment member is divided in the axial direction into: a first divided body to which an inner peripheral edge portion of the first elastic body is joined; and a second divided body to which an inner peripheral edge portion of the second elastic body is joined, the inner peripheral edge portions of the elastic bodies are located side by side in the axial direction, the first divided body is provided with restriction portions to which the inner peripheral edge portion of the first elastic body is joined from radially outward, which are arranged so as to overlap a radially inner end of the elastic division walls in the axial direction, and the radially inner end of the elastic division wall is sandwiched between the restriction portions and an inner peripheral edge portion of the second elastic body, the second divided body is provided with a main unit and an attachment unit, the main unit being spaced from the first divided body in the axis line direction and forming an annular concave onion extending in a circumferential direction of the main unit between the main unit and the first divided body, and the attachment unit protruding toward the first divided body from the main unit and being connected to the first divided body, and an inner peripheral edge portion of the first elastic body is fitted into the annular concave portion.