Vehicle wheel suspension with transverse leaf spring

A motor-vehicle suspension system comprises for each wheel at least one transverse control arm (50) having an outermost end connected in an articulated way to a respective wheel support (2) and an innermost end connected in an articulated way to the frame (9) of the motor vehicle in such a way that each control arm (50) guides the vertical movements of the respective wheel support (2) by means of an oscillation in a plane that is substantially transverse with respect to the longitudinal direction (A) of the motor vehicle. The spring means of the suspension are constituted by a leaf spring (51) set transversely with respect to the longitudinal direction of the motor vehicle and constituting a unit separate from the transverse arms (50). The leaf spring (51) is set centrally between the two transverse arms (50), and has its ends connected to the innermost ends of the transverse arms (50) in such a way that the oscillations of the transverse arms (50) in the substantially transverse plane cause a deformation of bending of the leaf spring (51). The connection of each transverse arm (50) to the leaf spring (51) is such as to enable oscillations of the transverse arm (50) in a substantially horizontal plane with respect to the leaf spring (51) and minor relative sliding between the connected ends of the arm (50) of the leaf spring in the longitudinal direction of the leaf spring. The articulated connections of each transverse arm (50) to the respective wheel support (2) and to the respective end of the leaf spring (51) are obtained with the aid of conventional elastic bushings (B).