| 摘要 |
PURPOSE:To perform effective damping of vibration of a wide range of from a low frequency to a high frequency and to reduce the size of a whole by providing three orifices and jointly forming a part of an orifice. CONSTITUTION:A vulcanization-molded body 7 wherein an inner sleeve 8 coupled to a vibration body is arranged at a central part and a resilient body 9 is vulcanization-molded therearound is arranged in the space 2 of a casing 1 coupled to a support body, and first and second liquid chambers 17 and 18, separated away from each other, are formed in the space. First and second orifices 3 and 4 through which the first and second liquid chambers 17 and 18 are intercommunicated, and a third orifice 5 through which the second orifice 4 and the second liquid chamber 18 are intercommunicated are formed in the casing 1. Further, an on-off valve 6 through which the first and second orifices 3 and 4 are communicated with the second liquid chamber 18 is provided and the two liquid chambers 17 and 18 are filled with fluid. |
