| 摘要 |
PURPOSE:To obtain an insulating property and a damping property with respect to both high frequency and low frequency by disposing a main fluid chamber and an auxiliary fluid chamber between first and second support fittings in communication with each other, and forming an air chamber on a side opposite to the main fluid chamber via an elastic film, for supplying/sucking air. CONSTITUTION:A rubber elastic body 14 is interposed between first and second support fittings 10, 12. A main fluid chamber 54 and an auxiliary fluid chamber 58 both with high viscous fluid sealed therein are formed in communication with each other via a communicating passage 62. An air chamber 48 is constituted of a partition fitting 42 and a first rubber elastic film 44, and air is supplied/ sucked via an air passage 50. Furthermore, a narrow plate 26 is disposed. When the air chamber is eliminated by air suction, an excellent damping property with respect to low frequency can be obtained by a slide shear effect of the high viscous fluid. Moreover, an excellent vibration insulating property with respect to high frequency can be realized when the air chamber exists. |
