| 摘要 |
PURPOSE:To form a limiting passage with a simple structure by dividing a vibration absorbing liquid chamber into multiple small liquid chambers with a partition wall and providing either an other wall or the partition wall with a limiting passage for communicating these small chambers with each other, thereby reducing the number of components. CONSTITUTION:On the inner circumference of an outer wall 34 is arranged a liquid chamber 42 between a diaphragm 35 and an elastic body 36, with the liquid chamber 42 divided by a partition wall 44 into an upper small liquid chamber 42A and a lower small liquid chamber 42B. The partition wall 44 is fixed between the outer wall 34 and a base plate 30, with a circumference of a top plate 44A forming a limiting passage 48. A direct connection part between the peripheral part of the top plate 44A and an upper part of a cylindrical part 44B is provided with a recessed part 54 to communicate the limiting passage 48 and the upper small liquid chamber 42A. Also, since the limiting passage 48 communicates with the lower small liquid chamber 42B via an elliptical hole 58, the limiting passage 48 communicates with the upper small liquid chamber 42A via the recessed part 54 and with the lower small liquid chamber 42B via the elliptical hole 58. |
