A MOTORIZED AXLE WITH VARIABLE TRACK FOR PICK AND CARRY CRANE

A motorized axle with variable track for pick and carry crane comprising a mobile machine and a crane, wherein said axle comprises a fixed main support body (1), a first (2) and a second (2') movable axle shaft, a first (3) and a second (3') cylinder of hydraulic or electric type comprising a body and a rod, a first (4) and a second (4') hydraulic or electric motor, a first (5) and a second (5') gearmotor, a first (6) and a second (6') wheel connected to the respective gearmotor (5, 5'), a first (9) and a second (9') anti-rotation feather key, wherein said main body (1) is permanently anchored to the machine to be driven, in the interior thereof there being housed, with a coupling with one degree of freedom, only sliding, said first (2) and second (2') movable axle shaft, wherein the rotation between the fixed main body (1) and each movable axle shaft (2, 2') is prevented by said first (9) and second (9') anti-rotation feather key; wherein each movable axle shaft (2, 2') comprises a tube (11, 11') and two plates (7, 7', 8, 8') and said tube (11, 11') at one side is anchored to the respective motor (4, 4') and gearmotor (5, 5') through said plate (7, 7'), while the opposite side is anchored to the cylinder rod (3, 3') through said plate (8, 8') comprising a ferrule; wherein the variation in length of said cylinders (3, 3'), commanded by the actuation of a lever or button type selector, causes the sliding of said first and second movable axle shaft (2, 2') inside of said fixed main support body (1), determining the dimensional change of the axle.