| 摘要 |
PURPOSE:To reduce the high frequency vibration by providing a partitioning wall to partition a liquid chamber into two smaller liquid chambers composed of an elastic body, a limiting passage communicating the smaller liquid chambers to each other, a vibrating body to permit a minute expansion/contraction of the smaller liquid chambers, and an interrupting member which is vertically provided on the vibrating body and forms a narrow part between the vibrating body and the elastic body. CONSTITUTION:When the engine is in operation, the vibration is transmitted to an elastic body 18 through a supporting member 20, and absorbed by its internal friction. When the frequency of the vibration is increased, a limiting passage 34 absorbs the vibration by the liquid passing resistance, and when the frequency is further increased, the limiting passage 34 gets clogged. But a vibrating body 42 achieves a minute vibration and the rise of the pressure in the upper and the lower smaller liquid chambers 26A, B is limited, leading to absorption of the vibration. When the frequency is further increased, a reduced-diameter part 48 of the vibrating body 42 is brought into contact with a partitioning wall 28 or an abutting plate 30, and the increase of the dynamic spring constant can be avoided by the resonance of the liquid column when the liquid in the upper smaller liquid chamber 26A passes through a narrow part 60, leading to absorption of the vibration. Since the interrupting member 54 is formed on the side of the elastic body 18, no inconveniences are met in achieving the vulcanizing adhesion of the elastic body 18, reducing the number of the parts. |
