| 摘要 |
PURPOSE:To secure an effective vibration-proof effect by means of a resonant action of sealed fluid against the vibro-input of different frequency bands by letting a fluid flow via a bottleneck passage and an orifice passage lying between paired inner-outer split chambers, while adjusting the size of each passage. CONSTITUTION:In a strut bar cushion 10, when a cross direction vibration is inputted in an interval between an inner tube fitting 12 and an outer tube fitting 36, there is produced each relative volumetrical variation between each pair of inner-outer split chambers 40, 42. If so, the flow of a fluid passing through a bottleneck passage 44 between respective inner split chambers 40 and that of a fluid passing through an orifice hole 46 between respective outer split chambers 42 are caused independently with each other. Accordingly, different tunings are applied to the bottleneck passage 44 and the orifice hole 46, through which an effective vibration-proof effect to an input vibration of different frequency bands is securable. At this time, these inner-outer split chambers 40, 42 are partitioned off by means of a pair of partition rubber walls 28 and a single partition plate 32. |
