GEARED MOTOR Russian patent published in 2001 - IPC

FIELD: electromechanics; gearbox-coupled electrical machines used as drives of miscellaneous machines and mechanisms. SUBSTANCE: geared motor has frame-and-stator field structure and shaft-mounted rotor. Reduction unit whose transmission is built around balls contacting rotor shaft, frame, and output shaft is mounted on one end of shaft. For the purpose shaft is provided with annular groove to receive balls. Novelty is that mentioned groove is skewed and respective surfaces of two other parts contacting the balls are made so that one of them has holes to receive balls and other one is made in the form of toothed antifriction track with front arrangement of teeth; tooth number per unity is other than ball number. It will be good practice to mount similar reduction unit on opposite end of motor shaft but groove on rotor shaft should be skewed in opposite direction. EFFECT: reduced mass and size approaching those of electric motor at same performance characteristics. 2 cl, 7 dwg