To provide a vibration isolation device in which generation of cavitation when an excessive load is input can be suppressed.SOLUTION: The vibration isolation device has: a cylindrical body; a support; an elastic body connecting the support and the cylindrical body to each other; a partition member 33 which is provided in the cylindrical body, partitions the cylindrical body into a main liquid chamber 40 and an auxiliary liquid chamber 44, defines a first housing chamber 66 housing a membrane 36 displaced according to pressure difference between the main liquid chamber 40 and the auxiliary liquid chamber 44, and is provided with a hole 93 causing the first housing chamber 66 to communicate with the main liquid chamber 40, and a hole 94 causing the first housing chamber 66 to communicate with the auxiliary liquid chamber 44; a through-hole 72 formed in the membrane 36; a main liquid chamber-side projection portion 78 which is provided along a peripheral edge of the through-hole 72 of the membrane 36, projects and curves toward the main liquid chamber 40, and comes in contact with an inner wall of the first housing chamber 66 at the distal end of the projection portion 78; and an auxiliary liquid chamber-side projection portion 70A which is provided in the membrane 36, projects toward the auxiliary liquid chamber 44, abuts on the inner wall of the first housing chamber 66 to block a space between the through-hole 72 and the hole 94.SELECTED DRAWING: Figure 4
【課題】過大な負荷が入力した場合のキャビテーションの発生を抑制することのできる防振装置を得る。【解決手段】防振装置は、筒体と、支持体と、支持体と筒体とを連結する弾性体と、筒体に設けられ、主液室40と副液室44とを区画すると共に、主液室40と副液室44との圧力差に応じて変位するメンブラン36を収容する第1収容室66を画成し、第1収容室66と主液室40とを連通する孔93、第1収容室66と副液室44とを連通する孔94を設けた仕切部材33と、メンブラン36に形成された貫通孔72と、メンブラン36の貫通孔72の周縁に沿って設けられ、主液室40に向けて突出すると共に湾曲し、先端が第1収容室66の内壁に接触した主液室側凸部78と、メンブラン36に設けられ、副液室44に向けて突出すると共に、第1収容室66の内壁に当接して貫通孔72と孔94との間を閉塞する副液室側凸部70Aと、を有する。【選択図】図4
VIBRATION ISOLATION DEVICE
防振装置
28.11.2019
Patent
Elektronische Ressource
Japanisch
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