A vehicle axle has two supporting members, which are engaged in rotary manner
by
respective vehicle wheels, are hinged to a frame of the axle, and are movable about
respective hinge axes by at least one steering actuating cylinder acting on one
of the supporting members; and a connecting bar having a central portion connected
in sliding manner to the frame, and two lateral portions, each connected in rotary
manner to one of the supporting members and to the central portion.
