| 摘要 |
PURPOSE:To show satisfactory characteristic even under high-temperature atmosphere and a severe application condition. CONSTITUTION:An upper plate 1 is provided oppositely to a bottom plate 2, and a side plate 7. An elastic rubber body 3 is arranged for connecting an outer periphery of the upper plate 1 to an opening edge of the side plate 7. A lower side of a partition plate 5 is sealed with a rubber film 4. An inner space is divided, by the partition plate 5, into upper and lower liquid chambers A, B which are communicated with each other through a throttle flow passage 52. A coil spring 6 is arranged in the liquid chamber A between the partition plate 5 and the upper plate 1. A rubber guide groove 12 is formed on a lower surface of the upper plate 1, through which a part of the elastic rubber body 3 reaches an outer periphery of a head 81 of a fixing bolt 8 piercing the upper plate 1. A seal rubber layer 31 for covering the head 81 is thus formed. A spring constant of the device is determined by the coil spring 6. The elastic rubber body 3, without restriction of the spring characteristic, is composed of heat- resistant rubber material, so that the body has durability even under high-temperature atmosphere. It is unnecessary to provided an independent seal member with the presence of the seal rubber layer 31, so that the sealing of the bolt-piercing part is facilitated. |
