ELECTRIC MOTOR DRIVE Russian patent published in 2001 - IPC

FIELD: manufacture of fittings. SUBSTANCE: invention specifically refers to aids controlling stop valves of pipe-lines. Electric motor drive includes electric motor, two differential mechanisms, brake and stopper. First differential mechanism has central gear wheel 3, outer gear wheel 5, output shaftcarrier 6 with satellites 8 and stopper. Second differential mechanism has central gear wheel 14, carrier 20 with satellites 15, 16, gear wheel 17 and brake 27 of carrier 20. Idler gears 9 interact with outer gear wheel 5 and gear 10 put on hollow shaft 11. Stopper interacts with latch 34 with grooves 37 of outer gear wheel 5. Shafts of gear 9 are anchored on support 13 which is kinematically coupled to latch 34 and brake 27 and is spring-loaded with reference to body 2 by rests against turning about central shaft 4. EFFECT: expanded functional capabilities of electric motor drive, improved reliability of gear shifting from increased velocity to velocity with enhanced torque. 5 dwg