GEAR DRIVE Russian patent published in 1997 - IPC

FIELD: mechanical engineering; gear drives at stepless change of gear ratio. SUBSTANCE: gear drive includes housing with coaxial shafts, variable-speed drive consisting of two hollow spherical members, intermediate friction members, load-bearing sprocket and gear ratio control mechanism which includes two control sprockets, two sliders, two rods kinematically linked with intermediate friction members and double-arm levers connecting the rods with sliders. Additional variable- speed drives mounted coaxially relative to main one consists of hollow friction members one of which is rigidly connected with respective hollow friction member of main variable-speed drive and other is connected with respective shaft; additional variable-speed drive includes also intermediate friction members and gear ratio control mechanisms which includes rod kinematically linked with intermediate friction members and circular rod with chute. Spherical end portion of one arm of bell-crank double-arm levers in engageable with chute of one of circular rods and spherical end portion of other arm is engageable with rod of gear ratio control mechanism of respective additional variable-speed drive. EFFECT: enhanced efficiency. 8 dwg