| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a groove width of an outer end on a depression side in a communication groove from narrowing when an outer cylinder is fitted onto a rubber elastic body outside. <P>SOLUTION: The communication groove 15 which communicates with both of the insides of the depressions 14 circumferentially lying next to each other is formed in the rubber elastic body 13. A member 17 to be covered is separately fitted to each of the depression to define a liquid chamber. The outer cylinder 12 is fitted onto the rubber elastic body outside. The communication groove is defined by a pair of rising walls 22 which are formed integrally with the rubber elastic body. A communication opening and a connecting groove which connects to the communication opening and the communication groove are formed on the member to be covered. The communication groove, the communication opening, and the connecting groove are covered with the outer cylinder to define an orifice passage which communicates with both of the liquid chamber circumferentially lying next to each other. The member to be covered is positioned in the outer end on the depression side in the communication groove, and includes a pair of supporting projections 21 spaced in the groove width direction, the projections supporting the pair of rising walls from the inside in the groove width direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
