| 摘要 |
PURPOSE:To reduce drive force necessary for controlling an internal pressure in a pressure receiving chamber, in a phase converting fluid sealed vibroisolating device wherein a vibrationproofing characteristic is switched by controlling an internal pressure in a fluid chamber. CONSTITUTION:A wall part of a fluid chamber 48, formed between the first and second supporting metal fixtures 12, 14 connected by a rubber elastic unit 16, is partly constituted of the rubber elastic unit 16. Further, in a vibration plate 62 displaceably supported relating to the second supporting metal fixture 14 to generate a change of internal pressure in the fluid chamber 48 by being driven by an actuator 72, an effective piston area: A2 relating to the fluid chamber 48 is set relating to an effective piston area: A1 relating to the fluid chamber 48 of the first supporting metal fixture 12, so that the following expression:. 0.3<=(A2/A1)<=0.8. can be satisfied. |
