| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration-proofing device which attenuates and absorbs both of shake vibration and vibration of frequencies higher than the shake vibration, inputted upon driving of a vibration generation part.SOLUTION: A vibration proofing device 1 comprises a partition member 16 formed of a first orifice 21 which communicates a main liquid chamber 14 and a sub liquid chamber 15 and generates liquid-column resonance with respect to input of shake vibration, and a second orifice 22 which communicates the main liquid chamber 14 and the sub liquid chamber 15 and generates liquid-column resonance with respect to input of idle vibration, and is provided with an opening and closing means 31 which opens and closes an opening on the sub liquid chamber 15 side in the second orifice 22. Therein, a third orifice 23 which communicates the main liquid chamber 14 and the sub liquid chamber 15 and generates liquid-column resonance with respect to input of vibration of frequencies higher than the shake vibration is formed on the partition member 16 and an elastic closing plate 24 which closes an opening on the main liquid chamber 14 side in the third orifice 23 is provided. |
