A self-propelled vehicle (1) comprising a box-shaped frame (10) provided with a loading member (32) extending in a given direction (Dl) and with an actuation assembly (20) carried by the frame (10)； a plurality of arms (42) being hinged to said frame (10) and having an end portion (44) provided with at least a wheel (46) connected to said actuation assembly (20) for the actuation thereof； the arms (42) being hinged to the frame (10) and articulated so as to adjust, as desired, the orientation and the distance of said loading member (32) with respect to the end portions (44).
