LIQUID-SEALED ANTIVIBRATION DEVICE

摘要

[Problem] To provide a liquid-sealed antivibration device capable of improving the position accuracy of an outer fitting member and a diaphragm.;[Solution] An outer fitting member 11 is externally fitted on a partition member 20 with an interposition portion 10b interposed, and the interposition portion 10b is made to be fixed in thickness. Thus, when a diameter reduction process is given to a second attaching member 3, the outer fitting member 11 is restrained from being displaced in a direction to slip out of the partition member 20. Therefore, the outer fitting member 11 is restrained from falling eccentric or inclined relative to the partition member 20, and hence, it can be realized that the outer fitting member 11 and the diaphragm 10 are improved in position accuracy.

主权项

1. A liquid-sealed antivibration device comprising a first attaching member, a cylindrical second attaching member, an antivibration base body connecting the first attaching member and the second attaching member and constituted by a rubber-like elastic body, a diaphragm defining a liquid-sealed chamber between itself and the antivibration base body and constituted by a rubber-like elastic body, a partition member dividing the liquid-sealed chamber into a first chamber on the antivibration base body side and a second chamber on the diaphragm side, and an orifice making communication between the first chamber and the second chamber, wherein:
there are provided a cylindrical outer fitting member externally fitted on the partition member and an interposition portion arranged on an inner peripheral surface of the outer fitting member to be a fixed dimension in thickness, connected to an outer edge part of the diaphragm and made of a rubber-like elastic body; the outer fitting member is externally fitted on the partition member with the interposition portion interposed between the outer fitting member and the partition member; the partition member is provided with a protruding portion which protrudes radially outward from an outer peripheral surface and with which an axial end surface of the externally fitted outer fitting member is brought into contact, and is formed to be cylindrical at an area where the outer fitting member is externally fitted; and the second attaching member is subjected to a diameter reduction process with the outer fitting member externally fitted on the partition member.