PROBLEM TO BE SOLVED: To provide a cylindrical vibration isolator with a new structure which achieves reduction in weight by an outer cylinder member made of synthetic resin, in which a spring constant in a direction perpendicular to an axis is set to be efficiently large and which can advantageously reduce the spring constant in a wrench direction.SOLUTION: A body rubber elastic body 16 is fixed to a large diameter part 18 provided at a middle portion in an axial direction of an inner shaft member 12. On the other hand, an inner surface of an inner peripheral recess part 20 opening to an inner peripheral surface of an outer cylinder member 14 includes an inner taper surface 22 which inclines to the inner peripheral side toward the outside of the axial direction. The body rubber elastic body 16 is fixed to the inner taper surface 22. Furthermore, an inner surface of an outer peripheral recess part 24 opening to an outer peripheral surface of the outer cylinder member 14 includes an outer taper surface 26 which inclines to the outer peripheral side toward the outside of the axial direction. By the outer cylinder member 14 being fitted and inserted into a mounting hole of a vibration isolation connected object member, an axial direction outer end portion of the outer cylinder member 14 is deformed to the inner peripheral side by the outer taper surface 26 being pressed by an inner surface of the mounting hole.
【課題】合成樹脂製のアウタ筒部材によって軽量化などを図ると共に、軸直角方向のばね定数を効率的に大きく設定しつつ、こじり方向のばね定数を有利に小さくすることができる、新規な構造の筒形防振装置を提供する。【解決手段】インナ軸部材12の軸方向中間部分に設けられた大径部18に本体ゴム弾性体16が固着されている。一方、アウタ筒部材14の内周面に開口する内周凹部20の内面が、軸方向外方に向かって内周側へ傾斜する内テーパ面22を備えており、内テーパ面22に本体ゴム弾性体16が固着されている。更に、アウタ筒部材14の外周面に開口する外周凹部24の内面が、軸方向外方に向かって外周側へ傾斜する外テーパ面26を備えており、アウタ筒部材14が防振連結対象部材の装着孔に嵌入されることにより、外テーパ面26が装着孔の内面で押圧されてアウタ筒部材14の軸方向外端部分が内周側に変形せしめられるようにした。【選択図】図1
CYLINDRICAL VIBRATION ISOLATOR
筒形防振装置
25.06.2015
Patent
Elektronische Ressource
Japanisch
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