| 摘要 |
PURPOSE:To reduce the extent of vibration in a wide variety of ranges by installing plural sub liquid chambers and also plural pieces of selectable limiting passages in sad between a main liquid chamber and either of the sub liquid chambers. CONSTITUTION:Rubber 16 is installed in space between an inner cylinder and a supporter 14 connected to a bottom plate 10. Two liquid chambers 30 and 32 are formed in those of inner cylinder 18, bottom plate 10, supporter 14 or the like, and the main liquid chamber 30 and the first sub liquid chamber 32 are partitioned off by a partition chamber 28. An idle orifice 60 and a shake orifice 62 connecting an interval between these liquid chambers 30 and 32 are selected by a rotor 36 set up in the partition member 28. In addition, a second sub liquid chamber 80 used with a diaphragm 84 being high in rigidity as a part of the inner wall is formed in the partition member 28, and it is connected to the main liquid chamber 30 via a high-frequency orifice 63. |
