| 摘要 |
PURPOSE:To prevent high frequency vibration from being transmitted to a vehicle body, by utilizing an orifice to damp low frequency vibration having a large amplitude, and as well by providing a plurality of valve mechanisms arranged in parallel with each other to lower a dynamic spring constant in an unfavorable high frequency vibration range. CONSTITUTION:A mount rubber 3 having a hollow space 3 is secured between a power unit side base plate 1 and a vehicle body side base plate 2 to which diaphragms 4, 5 and partition plates 6, 7 are secured, respectively. Further, a first counter chamber 8 is formed in one diaphragm 4 and a second counter chamber 9 is formed in the other diaphragm 5. A fluid chamber 11 is defined between both partition plates 6, 7, and fluid such as, for example, oil, etc. is filled in the fluid chamber 11 as well in the counter chamber 8, 9. Further, one partition plate 6 is provided therein with a first valve mechanism 12 which is movable in association with high frequency vibration having a small amplitude but is restrained from moving with respect to low frequency vibration having a large amplitud, and the other partition plate 7 is provided therein with a second valve mechanism 13 having the similar characteristic and an orifice 14 communicating between the fluid chamber 11 and the second counter chamber 9. |
