To provide a fluid sealed type cylindrical vibration isolator with a new structure capable of avoiding the allophone due to the stick slip while during oscillatory input in the axial direction, the fluid tightness between fluid chambers is secured so as to effectively exhibit the target vibration isolating performance.SOLUTION: In a fluid sealed type cylindrical vibration isolator 16 in which an encapsulation region 62 of incompressible fluid is formed between an inner shaft member 42 connected by a body rubber elastic body 46 and an outer cylinder member 44, the encapsulation region 62 is partitioned by a partition rubber 72 into fluid chambers 66 and 68 on both sides in the axial direction, and the fluid chambers 66 and 68 are communicated by an orifice passage 78, one of the partition rubber 72 and a concave groove 76 is provided on the inner shaft member 42 side and the outer cylindrical member 44 side, an end portion 80 of the partition rubber 72 is inserted into the concave groove 76 without being compressed in the direction perpendicular to the axis, and the end portion 80 of the partition rubber 72 is axially pressed against the inner surface of the concave groove 76 so that a seal portion 92 is configured.SELECTED DRAWING: Figure 1
【課題】軸方向の振動入力時に、流体室間の流体密性が確保されて、目的とする防振性能が有効に発揮されると共に、スティックスリップによる異音の回避なども図られる、新規な構造の流体封入式筒形防振装置を提供すること。【解決手段】本体ゴム弾性体46で連結されたインナ軸部材42とアウタ筒部材44の間に非圧縮性流体の封入領域62が形成されて、封入領域62が隔壁ゴム72によって軸方向両側の流体室66,68に仕切られていると共に、流体室66,68がオリフィス通路78で連通された流体封入式筒形防振装置16において、インナ軸部材42側とアウタ筒部材44側には隔壁ゴム72と凹溝76の各一方が設けられており、隔壁ゴム72の先端部分80が軸直角方向に圧縮されない状態で凹溝76に差し入れられていると共に、隔壁ゴム72の先端部分80が凹溝76の内面に軸方向で押し付けられることによりシール部92が構成されるようにした。【選択図】図1
FLUID SEALED TYPE CYLINDRICAL VIBRATION ISOLATOR
流体封入式筒形防振装置
2019-05-30
Patent
Elektronische Ressource
Japanisch
Europäisches Patentamt | 2019
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