| 摘要 |
PROBLEM TO BE SOLVED: To effectively reduce two kinds of vibrations having different frequencies by constituting in such a way that liquid column resonance action of a liquid flowing between a main liquid chamber and an auxiliary liquid chamber through an orifice passage is obtained when vibration in the direction of right angle to a shaft is input between a main shaft metal fitting and an outer cylinder metal fitting. SOLUTION: A main shaft metal fitting 1 and intermediate cylinder metal fittings 2 which are arranged substantially coaxially across a distance on its outer side and have a pair of window parts 23, 24 are provided, and both of them 1, 2 are mutually connected by a rubber elastic body 3 having a pair of recessed parts 35, 36 which are opened in each window part 23, 24. Moreover, a first diaphragm 4 is arranged around the window part 23 on one side of the intermediate cylinder metal fitting 2, a main liquid chamber 55 and an auxiliary liquid chamber 56 are formed at outer periphery of the rubber elastic body 3, and an orifice formation member 5 forming a first orifice passage 57 and a second orifice passage 58 is arranged in an outer peripheral part. Furthermore, an outer cylinder metal fitting 6 having a communicating window 62 communicating with the outside is coaxially arranged on an outer side of the intermediate cylinder metal fitting 2, and a second diaphragm 7 is provided around the communicating window 62. |
