Four-wheel steering apparatus.

摘要

A four-wheel steering apparatus comprises a front wheel steering member for steering front wheels by being displaced according to a movement of a steering wheel, a rear wheel steering mechanism for steering rear wheels, a coupling mechanism for mechanically coupling together the front wheel steering member and an input member of the rear wheel steering mechanism, and a play mechanism provided between an end of the coupling mechanism and the front wheel steering menber or the input member or in an intermediate part of the coupling mechanism, the play mechanism effecting transmission of displacement only when a displacement in excess of a predetermined amount is produced in either direction from a position corresponding to a neutral position with respect to the steering angle of the front wheels, the rear wheel steering mechanism including a mechanism for steering the rear wheels according to a movement of the input member and an independent steering mechanism for steering the rear wheels independently of the displacement of the front wheel steering member.