Abstract: A power plant for electric earth-moving and agricultural vehicles with four-wheel drive which comprises a supporting chassis, an electric motor drive for driving wheels of the vehicle; the motor drive comprises a gear-type reduction and distribution unit which is installed in a housing which is rigidly coupled to the chassis, at least two electric motors whose body is fixed to the housing, a front longitudinal distribution shaft and a rear longitudinal distribution shaft which protrude from the housing, two differentials which are fitted at the ends of the distribution shafts and from which a front axle and a rear axle respectively protrude for respective pairs of driving wheels, at least one of the axles being provided with steering elements; and an assembly for an oscillating support of the front axle which is fixed, in a downward region, to a front end of the supporting chassis.

Abstract: An electric earth-moving vehicle, particularly for poorly ventilated locations, comprising an electric motor drive for driving wheels of the vehicle, a hydraulic unit which is actuated by a further electric motor drive for equipment installed on the vehicle, at least two sets of batteries for the motor drives, a control unit for connecting the motor drives to the two sets of batteries which is adapted to connect the motor drives individually or simultaneously to one set of batteries or the other or to both, and a supporting chassis which has, in a median and downward region, a tunnel for inserting one of the two sets of batteries.

Abstract: A power plant for electric earth-moving and agricultural vehicles with four-wheel drive which comprises a supporting chassis, an electric motor drive for driving wheels of the vehicle; the motor drive comprises a gear-type reduction and distribution unit which is installed in a housing which is rigidly coupled to the chassis, at least two electric motors whose body is fixed to the housing, a front longitudinal distribution shaft and a rear longitudinal distribution shaft which protrude from the housing, two differentials which are fitted at the ends of the distribution shafts and from which a front axle and a rear axle respectively protrude for respective pairs of driving wheels, at least one of the axles being provided with steering elements; and an assembly for an oscillating support of the front axle which is fixed, in a downward region, to a front end of the supporting chassis.

Abstract: A knob closure device for operating and locking two surfaces which are axially movable with respect to the knob, which comprises: a pin that can be coupled to the first surface and is affected by two annular end grooves; a hollow body that can be coupled to the second surface and supports, so that they can move axially and rotate, the actuation knob on one side and a disengagement cylinder on the other side, the knob and the cylinder being mutually coupled; a central bushing, which is rigidly coupled to the hollow body and in which two oppositely arranged inclined slots are formed that converge toward each other and toward the free end of the bushing; two transverse shafts that are slidingly mounted in the slots and are pushed by a compression spring in tangential engagement in the annular grooves to couple the pin to the bushing; a cam profile that is rigidly coupled to the inlet of the main body, against which a diametrical stem of the knob engages that is adapted to cause the axial sliding of the end of th