Electromechanical power steering system with play compensation for the worm gear mechanism

摘要

The invention relates to an electromechanical steering system having an electric servomotor (1) which drives a worm shaft (2) which meshes with a worm gear (7) which is arranged on a steering shaft (8), wherein the worm gear (7) is operatively connected to an input shaft of a steering gear, and wherein the worm shaft (2) and the steering shaft (8) are mounted rotatably in a common gearbox casing (9), in which the worm shaft (2) has a free end (12) which is remote from the motor and is mounted in a rolling bearing (13) with an inner ring (14), rolling bodies (15) and an intermediate ring (16), wherein the intermediate ring has an inner running surface for the rolling bodies (15) and an outer running surface for outer rolling bodies (17), and wherein the inner running surface and the outer running surface of the intermediate ring (16) are arranged eccentrically with respect to one another.

主权项

1. An electromechanical power steering system including:
an electric servomotor; a worm shaft configured to be driven by the electric servomotor, wherein the worm shaft has a free end that is remote from the electric servomotor; a rolling bearing in which the free end of the worm shaft is configured to be mounted, the rolling bearing including an inner ring, inner rolling bodies, and an intermediate ring, wherein the intermediate ring includes an inner running surface for the inner rolling bodies and an outer running surface for outer rolling bodies, wherein the inner running surface and the outer running surface of the intermediate ring are arranged eccentrically with respect to one another; a steering shaft; and a worm gear coupled to the steering shaft, wherein the worm shaft meshes with the worm gear, wherein the worm shaft and the steering shaft are mounted rotatably in a common gearbox casing.