公开(公告)号：US4940446A

公开(公告)日：1990-07-10

申请号：US101831

申请日：1987-09-28

申请人： Masaki Inui ,  Mitsuhiko Okada ,  Seitoku Kubo ,  Shozoh Okuda ,  Masaki Hosono

发明人： Masaki Inui ,  Mitsuhiko Okada ,  Seitoku Kubo ,  Shozoh Okuda ,  Masaki Hosono

IPC分类号： B60K17/22 ,  B60K17/346 ,  F16H57/027 ,  F16H57/04

CPC分类号： F16H57/0469 ,  B60K17/22 ,  B60K17/3462 ,  F16H57/027

摘要： A rotating member such as a sprocket to be coupled with a shaft is formed with a fitting bore which extends on the center axis and opens at at least one of its axial end portions. The rotating member is arranged in and rotatably held by a case such that its fitting bore opens toward the outside of the case. The shaft is inserted into and coupled with the fitting bore held in the case such that it can rotate integrally with the rotating member. This rotating member is formed with an air communication portion for providing communication between the inside and outside of the fitting bore and equipped with a valve for opening or closing the air communication portion. The valve may be opened in response to the rise or drop in the internal pressure of a fitting bore, by the pressure of the shaft or by a centrifugal force. With the valve being closed, lubrication oil in the case is prevented from leaking. When the valve is opened, on the other hand, the air in the fitting bore is released, or the atmospheric air is introduced into the fitting bore. As a result, the insertion or extraction of the shaft is prevented from being obstructed even with fluctuations in the internal pressure of the fitting bore.

摘要翻译： 与轴联接的诸如链轮的旋转构件形成有在中心轴线上延伸并在其轴向端部中的至少一个处开口的配合孔。 旋转构件布置在壳体中并可旋转地保持，使得其装配孔朝向壳体的外部打开。 轴被插入并保持在壳体中的装配孔，使其能够与旋转构件一体旋转。 该旋转构件形成有用于在装配孔的内部和外部之间提供连通并配备有用于打开或关闭空气连通部的阀的空气连通部。 响应于装配孔的内部压力的上升或下降，通过轴的压力或通过离心力，阀可以打开。 阀门关闭时，防止机壳内的润滑油泄漏。 另一方面，当阀打开时，装配孔中的空气被释放，或者大气被引入到装配孔中。 结果，即使配合孔的内部压力的波动也防止轴的插入或抽出被阻塞。