Ball screw for use in steering system of motor vehicle, has threaded spindle guided at threaded nut, and ball channel running between nut and spindle, where path radii of nut path are smaller than path radii of spindle path

摘要

The ball screw has a ball threaded nut (10), and a ball threaded spindle (20) guided at the nut. A spiral-shaped ball channel (30) runs between the nut and spindle. Pressure angles (alphaml, alphamr) of a ball (31) on path radii (Rml, Rmr) of a nut path (11) are larger than pressure angles (alphasl, alphasr) of the ball on path radii (Rsl, Rsr) of a spindle path (21), respectively, where the path radii of the nut path are smaller than the path radii of the spindle path. The nut runs perpendicular to a spindle axis (S).