Off-centred pusher device for steering an automobile

摘要

The invention relates to a pusher device (8) that includes a rotary bearing (10) having an inner periphery (11) that is off-center relative to the outer periphery (12). In order to compensate for wear, the bearing (10) is rotationally urged in one direction (F) by a spring (10) and is thus pressed against the back (9) of a rack (3) that is then pushed back against the teeth of the steering sprocket (5). The rotary bearing (10) is rotatingly mounted in a housing (13) that is in turn mounted on a steering casing (2) so as to be capable of sliding in a direction (B) parallel to a plane (P) of the teeth (6) of the rack (3) and orthogonal to the axis (A) of said rack. Shock-absorbing spring means (20, 21) are arranged between the sliding housing (13) and the steering casing (2) for absorbing the straightness defects of the rack (3).

主权项

1. Off-centred pusher device for motor vehicle rack steering system, said steering system comprising a steering housing and a rack slidingly mounted in said steering housing, the pusher device comprising a rotary support whose inner periphery is eccentric relative to an outer periphery, said support being urged in rotation in one direction by an elastic element, and being structured so that it is applied via its inner eccentric periphery against a back of the rack to press the latter towards teeth of the steering pinion, wherein the rotary support is mounted in rotation in a sliding casing which is slidingly connected with the steering housing so that said sliding casing is guided in translation in a direction substantially parallel to a plane of the teeth of the rack, and orthogonal to a longitudinal axis of this rack, the elastic element being arranged between a wall of the sliding casing and said rotary support with eccentric inner periphery to urge this support in rotation in a predefined direction, and other elastic means being arranged between the sliding casing and the steering housing to act on said casing.