Abstract: A steering axle for vehicles includes means for angularly displacing the axle body about a steering axis as a consequence of the relative displacement between the wheel hubs and the axle body, and vertical securing means are provided between the axle body and the bearing structure in order to hold the axle body secured vertically to the bearing structure during the lateral displacement, wherein the vertical securing means comprise an extensible member, the extension of which is correlated to the position of the axle body with respect to the second steering axis.

Abstract: A steering axle for vehicles includes a body having axially opposed ends provided with a respective wheel hub hinged about a respective first steering axis, the axle body being in its turn hinged on to a bearing structure of the vehicle by means of an articulated joint spaced from the axle body for an angular displacement of the axle body with respect to the bearing structure about a second steering axis, a steering device acting between the wheel hubs and the axle body for steering the hubs about the first steering axis.

Abstract: A face clutch coupling device between rotating members comprises a first clutch element and a second clutch element which have face teeth and are movable relative to one another between a disengagement position and an engagement position in which the rotating members are coupled for rotation with one another. The device also comprises braking members which are associated with the clutch elements and by virtue of which, when there is relative motion between the rotating members, a preliminary driving interaction of the rotating members is brought about in the engagement position.

Abstract: A face clutch coupling device between rotating members comprises a first clutch element and a second clutch element which have face teeth and are movable relative to one another between a disengagement position and an engagement position in which the rotating members are coupled for rotation with one another. The device also comprises braking means which are associated with the clutch elements and by virtue of which, when there is relative motion between the rotating members, a preliminary driving interaction of the rotating members is brought about in the engagement position.

Abstract: In a braking unit of the SAHR type comprising a braking pack with disks and counter-disks, a resilient system for compressing the pack with a braking load sufficient for parking braking, a first hydraulic system for exerting on the resilient system a contrary load sufficient to cancel out its effect, a second hydraulic system acting on the pack to compress it with a braking load sufficient for service braking, both hydraulic systems share a single piston acting on one side on the pack and on the other side on the resilient system.