| 摘要 |
PURPOSE:To damp the vibration of a power unit, by providing a movable member resiliently supported on a mass member and producing damping effect through resonance of fluid in an orifice. CONSTITUTION:Since a movable board 13 is resiliently supported on a mass member 11, the movable board 13 moves relative to the mass member 11 in a frequency region lower than the resonant point of the mass member 11 so as to lower the pressure in a liquid chamber 16. In a frequency region higher than the resonant point of the mass member 11, the movable board 13 moves relative to the mass member 11 which is under stopped condition such that the pressure in the liquid chamber 16 is lowered. Consequently, the vibration of power unit can be damped through combination of the lowpass filter effect produced through resonance of the mass member 11 and the pressure reducing effect of the liquid chamber 16 provided by the movable board 13. |
