| 摘要 |
An apparatus for providing a conversion between longitudinal and rotational motion including a screw member having a thread having a constant angle and with individual ones of the opposing lands of the thread serving as the rolling surface for a cone member. The cone member is positioned within the lands of the thread and the cone member engages only one of the lands at a time along a line contact. Relative longitudinal movement between the screw member and the cone member is accomplished simultaneously with a relative helical movement between the screw member and the cone member and with the longitudinal motion and the helical motion between the screw member and the cone member occurring in either direction depending upon which of the lands is engaged by the cone member. The cone member also has a rotation about its central axis and such rotation occurs in a single direction.
|
