| 摘要 |
An axial roller bearing assembly adapted to move parallel to the axis of a shaft which carries the assembly. The shaft is circumferentially enclosed at least in part by a sleeve member which extends more than half way around the shaft and which is spaced therefrom to define between the sleeve member and the shaft longitudinal paths of movement for a plurality of rows of roller bodies. Each row of roller bodies is guided for movement along an endless path extending between the sleeve member and the shaft, around the ends of the sleeve member, and along the exterior of the sleeve member. The endless path of movement for each row of roller bodies has a load-carrying zone situated between the sleeve member and the shaft and a return zone situated at the exterior of the sleeve member. Each of the roller bodies has a central elongated portion of hourglass configuration conforming substantially to the circumferential curvature of the shaft, and this central elongated portion is situated between a pair of tapered end portions of each roller body, these end portions being symmetrically arranged with respect to the central elongated portion. The end portions and the central elongated portion of each roller body are interconnected by a pair of symmetrically arranged cylindrical portions which directly engage the external surface of the shaft and the internal surface of sleeve member at the loadcarrying zone of each endless path for each row of roller bodies. |
