INDUSTRIAL ROBOT DRIVE Russian patent published in 2000 - IPC

FIELD: manufacture of units of electrical and radio equipment. SUBSTANCE: power cylinders of different travel value are arranged in succession within one body. Body has partition through which rod of power cylinder of larger travel value is passed. The rod is positioned in hollow of cylinder of smaller travel value. To transmit one-way linear displacement to rod of power cylinder of larger travel value, use is made of mechanism in the form of yoke, compression spring and gripping collet engaged with them positioned coaxially with rod. Yoke is arranged in piston of power cylinder of smaller travel value. Piston, gripping collet and compression spring may be installed on rod of power cylinder of larger travel value. In other variant of drive piston may be mounted on sleeve and gripping collet and compression spring, on rod of power cylinder of larger travel value. EFFECT: simplified construction. 3 cl, 4 dwg