VARIABLE-SPEED DRIVE Russian patent published in 2000 - IPC

FIELD: mechanical engineering, machine- tool industry, instrumentation. SUBSTANCE: variable-speed drive has inlet member which is inlet member of one differential mechanism, and outlet member which is outlet member of other differential mechanism mechanically coupled with each other. Outlet members of first differential mechanism are coupled in pairs with inlet members of second differential mechanism through gear trains with different gear ratios. Overrunning clutch is placed in gear train with smaller gear ratio. EFFECT: simplified design, enlarged control range, prevention of power circulation. 3 dwg