| 摘要 |
PURPOSE:To enable wide range vibration damping by disposing an elastic film having a non-linear characteristic on a plate material interposed between liquid chambers to suitably damp high-frequency vibrations. CONSTITUTION:An upper ring 30 and a lower ring 42 which are respectively provided with a central circular hole are secured to the upper and lower portions of a cylindrical case 28 disposed in a liquid chamber 26, and an intermediate ring 34 is secured between both rings 30, 42. The intermediate ring 34 has a notch portion 36 at the outer peripheral portion and a circular hole at the central part thereof, and an elastic film 38 having a nonlinear chracteristic is disposed on the circular hole portion. A limit path connecting between upper and lower liquid chambers 26A, 26B is formed by face orifices between the upper ring 30 and the intermediate ring 34 and between the intermediate ring 34 and the lower ring 42. High-frequency vibration can be suitably damped by the elastic film 38 of the intermediate ring 34. |
