| 摘要 |
PURPOSE: To reduce manufacturing cost while surely exhibiting vibrationproof effect. CONSTITUTION: An intermediate cylinder 18 is arranged in an outer cylinder 16, and an inner cylinder metal fitting 12 connected to the intermediate cylinder 18 through a main body rubber 14 is arranged in the intermediate cylinder 18. A pressure receiving liquid chamber 28 and a sub-liquid chamber 30 expanding or contracting by a diaphragm 22 are provided in the outer cylinder 16, and they are partitioned off by a partition plate 20. An orifice forming member 40 is fixedly secured onto the outer circumferential face of the connecting part 18B of the intermediate cylinder 18 by welding or the like. Hereby, a restricted passage 34 is formed around the outer circumference of the intermediate cylinder 18, and the pressure receiving liquid chamber 28 and the sub-liquid chamber 30 are communicated to each other through the restricted passage 34. Consequently, accompanying relative displacement between the inner and outer cylinders 12, 16, the pressure receiving liquid chamber 28 is expanded/contracted, the sub-liquid chamber 30 is expanded/contracted through the restricted passage 34, and hence vibration is absorbed. |
