| 摘要 |
PURPOSE:To enable to reduce vibrations oppositely actuating to each other such as the high frequency vibration and the low frequency vibration through a vibration-damping bushing, by a method wherein an inner, intermediate and outer cylinders are arranged concentrically among which two kinds of elastic bodies whose spring constants are different from each other are loaded. CONSTITUTION:When an engine is in a high speed range, such as, running state and the vibration of a power unit is in a high frequency and small amplitude sphere, the vibration is transmitted to an intermediate cylinder 4 from an outer cylinder 3 through a first elastic body 5 and transmitted further to an inner cylinder 2 through a second elastic body 6. In this instance, as a spring constant of a second elastic body 6 is established low and a first and second space parts 10, 11 are formed in a load-acting direction, the vibration can be absorbed efficiently. When the vibration of the power unit is in a low frequency and large amplitude sphere, mainly the first elastic body 5 is deformed, one of a first and second liquid chambers 7, 8 is crushed, the other side is swollen and damper action is generated through resistance at the time of passing of a liquid between both chambers 7, 8 through a communicating path 9. |
