DRIVE (VERSIONS) Russian patent published in 2006 - IPC F16H37/08 

FIELD: mechanical engineering; devices for control of rotational speed of working member shaft.

SUBSTANCE: proposed drive has unadjustable electric motor, adjustable electric motors, input shaft 1 and output shaft 2, gear trains, differential gear trains formed by two wave gear trains with common wave generator 3 and worm transmissions and differential gear. Worm shafts 11 and 12 are set in rotation from adjustable electric motors. External gear wheels 6 and 7 of wave gear trains are coupled with worms 11 and 12. Internal gear wheels 9 and 10 of wave gear trains are kinematically linked with differential gear wheels 19 and 20 which are connected with output shaft 21 of drive. Two wave gear trains are chain-type in construction and are related as follows: Z_ch1+Z_ch2=2Z_ext; Z_ch1+Z=Z_ch2-Z, where Z_ch1 and Z_ch2 is number of rollers in chains of first and second wave gear trains; Z_ext is number of teeth of external gear wheel of wave gear drives thrown into engagement with rollers of chains; 2Z is difference of rollers in chains.

EFFECT: possibility of changing the direction of rotation and rotational speed of shaft of working member in wide range; increased speed of response; enhanced reliability.

5 cl, 3 dwg