Abstract: Device for steering the rear wheels of a vehicle with four wheel steering comprising an electric drive systems (1), a bolt-nut system (2) and a reduction mechanism (3), bolt (4) is placed between two guide elements (5) and is integral with an interball joint bar (6) by two connecting elements (7), said interball joint bar (6) being parallel to bolt (4); the unit being supported by a central plate (8) which receives two cases placed on both sides of said plate (8) to which they are attached so as to have a closed unit, interball joint bar (6) passing through said central plate (8).

Abstract: Process for assembling bodies, particularly for vehicle production lines, of the type adapted to a plurality of models of vehicles and their variants, in which a perfect geometry of a body at a work station is assured by means of a machine module and a structure module; a complete work cycle incorporates a feeding of a body, a distribution and a presentation of geometry tools, an intervention of robots or operators, and an evacuation of the assembled body.