To provide a liquid sealing type vibration isolator capable of improving durability of an elastic movable body.SOLUTION: In a second orifice P2, a pair of opposed surfaces 81c and 91c facing each other in upper and lower positions of a first valve part 13 is provided, and an outer peripheral part 12 of an elastic movable body 10 is formed so that its radial dimension D1 can be larger than its vertical dimension D2. Thus, when a liquid pressure of liquid passing through the second orifice P2 acts on the outer peripheral part 12 of the elastic movable body 10, the whole outer peripheral part 12 is deformed to bend. The deformation of the outer peripheral part 12 makes the first valve 13 and the opposed surfaces 81c and 91c (recesses 81d and 91d) separated from or brought into contact with each other so that a state of the second orifice P2 can switch between a communication state and a closed state. The whole outer peripheral part 12 of the elastic movable body 10 is deformed to bend. Thus, since stress can be restrained from being concentrated on a part of the outer peripheral part 12, a crack hardly appears in the outer peripheral part 12. Consequently, durability of the elastic movable body 10 can be improved.SELECTED DRAWING: Figure 5
【課題】弾性可動体の耐久性を向上できる液封入式防振装置を提供すること。【解決手段】第2オリフィスP2は、第1弁部13の上下に対向する一対の対向面81c,91cを備え、弾性可動体10の外周部12の径方向寸法D1が上下方向寸法D2よりも大きく形成される。これにより、第2オリフィスP2を通過する液体の液圧が弾性可動体10の外周部12に作用した場合に、外周部12の全体が撓むように変形する。その外周部12の変形によって第1弁部13と対向面81c,91c(凹部81d,91d)とが離隔または接触することにより、第2オリフィスP2の連通状態および閉塞状態が切り替えられる。弾性可動体10の外周部12の全体を撓ませるように変形させることにより、外周部12の一部に応力が集中することを抑制できるので、外周部12に亀裂が生じ難くなる。よって、弾性可動体10の耐久性を向上できる。【選択図】図5
LIQUID SEALING TYPE VIBRATION ISOLATOR
液封入式防振装置
2021-10-14
Patent
Elektronische Ressource
Japanisch
Europäisches Patentamt | 2019
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