VARIABLE-RADIUS CRANK MECHANISM Russian patent published in 2002 - IPC

FIELD: different type machines, machine tools, devices, instruments and robots, namely effective control of their efficiency or amplitudes of motion of working organs and actuating members. SUBSTANCE: crank mechanism includes apparatus for changing angular velocity of hollow drive shaft without changing angular velocity or rotation sign of crank itself. Said apparatus is in the form of planetary reduction gear whose satellites are joined with carrier. The last is joined with central shaft and it is provided with braking device. Second central wheel is joined with central shaft with possibility of free rotation and it is also provided with braking device. Screw of crank mechanism is double sided; it has different-hand thread for providing simultaneous different-sign motions of crank and weight for balancing it. EFFECT: enhanced reliability, simple regulation of crank radius, automatic minimization of unbalance. 1dwg