Ball-screw assembly having an isolator member

摘要

A ball-screw assembly comprising a ball-nut, a ball screw, a shell assembly, and an isolator member. The ball-nut threadingly engages the ball screw such that rotation of the ball-nut causes the rack shaft to move in a linear direction or vice versa. The shell assembly defines a cavity having the ball-nut disposed therein. The isolator member is disposed between the shell assembly and the ball-nut and transmits rotational forces between the shell assembly and the ball-nut. The isolator member acts as a spherical joint to allow the ball-nut and the ball screw to pivot within the shell assembly about a point on an axis of the ball screw, without causing the shell assembly to move.