Ball screw for electromechanical-based rack-and-pinion steering of motor vehicle, has balls arranged in ball channel, and in cage pocket of cage, where cage is connected to rotor of electric motor

摘要

The screw (5) has a spindle nut (6) arranged on a threaded spindle (4). A screw-shaped ball channel wound around a spindle axis is formed by a ball groove (7) of the spindle and the nut. Balls are arranged in the ball channel, and in a cage pocket (11a) of a cage (11). The cage is connected to a rotor (12) of an electric motor (13). The motor includes a stator (14) arranged coaxially to the spindle. An effective axial extension of the stator includes an axial traverse path of the cage opposite to the spindle nut. The rotor is provided with permanent magnets distributed over a periphery. The electric motor is formed as a servomotor provided with a measuring device.