Patent ID: 8376886

Claim:
A coaxial epicyclic transmission with bidirectional input and one-way output, comprising: an epicyclic gear train shell ( 500 ); an input shaft ( 2000 ) rotatably mounted on a first side of the transmission gear train shell ( 500 ) and arranged to be driven in a first rotary direction and a second rotary direction opposite to the first rotary direction; an output shaft ( 3000 ) rotatably mounted on a second side of the transmission gear train shell ( 500 ) and installed coaxially and in series with the input shaft ( 2000 ); an epicyclic gear support arm ( 400 ) from which extends an epicyclic gear shaft ( 401 ); an epicyclic gear train including: an inner bevel wheel ( 402 ) rotatable with the input shaft ( 2000 ); an epicyclic gear ( 403 ) engaged with the inner bevel wheel ( 402 ) and mounted on the epicyclic gear shaft ( 401 ); an outer bevel wheel ( 404 ) engaged with the epicyclic gear ( 403 ); and a first one-way transmission ( 301 ) coupled between the output shaft ( 3000 ) and the outer bevel wheel ( 404 ); a second one-way transmission ( 303 ) coupled between the epicyclic gear support arm ( 400 ) and one of the transmission gear train shell ( 500 ), the input shaft ( 2000 ), the outer bevel wheel ( 404 ), and the output shaft ( 3000 ); and a third one-way transmission ( 302 ) coupled between the input shaft ( 2000 ) and the output shaft ( 3000 ), wherein: when the input shaft is driven in the first rotary direction, power is transmitted directly between the input shaft ( 2000 ) and the output shaft ( 3000 ) to cause rotation of the output shaft ( 3000 ) in a first output direction, and when the input shaft ( 2000 ) is driven in the second rotary direction, rotation of the inner bevel wheel ( 402 ) causes rotation of the epicyclic gear ( 403 ) about an axis of the epicyclic gear shaft ( 401 ), which causes rotation of the outer bevel wheel ( 404 ), which causes rotation of the output shaft ( 3000 ) through the first one-way transmission ( 301 ) in the first output direction, thereby transmitting power from the input shaft ( 2000 ) to the output shaft ( 3000 ) through the epicyclic gear train to cause rotation of the output shaft ( 3000 ) in said first output direction.