Motorcycle front wheel suspension device

Abstract

A supporting and steering device for a front wheel of a motorcycle includes a single arm having a bent portion enveloping a portion of the periphery of the front wheel, a lower portion holding the wheel axle and an upper extension; a lower guiding arm having a first end rotatively mounted on the chassis in a position substantially perpendicular to the longitudinal median plane of the motorcycle and a second end; a first ball and socket joint which pivotally connects the second end of the lower guiding arm with the lower portion of the single arm; an upper connecting arm having a first end rotatively mounted on the chassis substantially perpendicular to the longitudinal median plane of the motorcycle and the second end; a second ball and socket joint which pivotally connects the second end of the upper connecting arm with the upper extension of the single arm; an imaginary line extending between centers of the first and second ball and socket joints constituting the steering axis of the front wheel about which the front wheel is angularly displaced for steering the motorcycle; and a suspension spring and shock absorber interposed between the upper extension of the single arm and the front peak of the motorcycle, with ends of the suspension spring and the shock absorber at least abutting the upper extension and the front peak, respectively.