Patent ID: 6116109
Filing Date: 2000-09-12
Classification: F16H,Y10T

Abstract:
Apparatus for converting a rotational movement into a rectilinear movement, including a threaded spindle, a nut which surrounds the threaded spindle concentrically at a spacing, and a plurality of rolling bodies arranged in this spacing and rolling on a track formed on an outer thread of the threaded spindle as well as on a corresponding track formed on a thread of the nut, with the rolling bodies being guided by a cage which includes slot-shaped pockets, disposed sequentially at spacings in circumferential direction, for receiving the rolling bodies, wherein during a rotation of the nut relative to the threaded spindle, each rolling body is axially displaceable within the cage by an amount of thread pitch and at the end of this rotation within an axial groove of the nut is returnable to its initial position by a respective cam arranged in vicinity of an end face of the cage, wherein the rolling bodies are formed by balls arranged in groups in several cage elements, and each cage element is guided for displacement in an axis-parallel manner within one of the slot-shaped pockets of the cage relative to the threaded spindle.