| 摘要 |
PURPOSE:To sufficiently reduce dynamic spring characteristic during inputting vibration of high-frequency and small magnitude, and sufficiently increase loss- factor during inputting vibration of low-frequency and large amplitude by setting the inside diameter dimensions of the inside opening part of a pressurizing chamber side stopper part of a rubber movable plate larger than the inside diameter dimensions of the inside opening part of a balancing chamber side stopper part. CONSTITUTION:The inside diameter dimensions of the inside opening part of a pressurizing chamber side stopper part 31 of a rubber movable plate 29 are set larger than the inside diameter dimensions of the inside opening part of a balancing chamber side stopper part 32. Thus, the movement of the rubber movable plate 29 to the pressurizing chamber 24 side becomes easier, dynamic spring characteristic during inputting vibration of high-frequency and small amplitude can be sufficiently reduced, and loss-factor during inputting vibration of low-frequency and large amplitude can be sufficiently increased, because supporting rigidity of the rubber movable plate 29 to the balancing chamber 25 side is enhanced. |
