| 摘要 |
PURPOSE:To enable absorbing efficiently a wide range of vibrations by making a main fluid chamber continuous to a sub-fluid chamber via the first orifice of variable sectional area and providing an auxiliary fluid chamber via said sub-fluid chamber and the second orifice of large fluid resistance. CONSTITUTION:When a vibratory body has vibrated, an elastic body 2 is deformed and the volume of a main fluid chamber 19 changes, thereby causing the motion of a fluid between the main fluid chamber 19 and a sub-fluid chamber 20 via the first orifice 33. In this case, when the vibration of said body is within a normal amplitude, the fluid moving between the main fluid chamber 19 and the sub-fluid chamber 20 via the first orifice 33 absorbs the vibration. Also, when a vibration of extremely large amplitude like a shake has occurred, the volume of the main fluid chamber 19 changes beyond the allowable volume change of the sub-fluid chamber 20, and the fluid moves between the sub-fluid chamber 20 and an auxiliary fluid chamber 21. The vibration of extremely large amplitude, therefore, is dampened by the fluid passing the second orifice 37 between said chambers 20 and 21. |
