| 摘要 |
PURPOSE:To simplify construction of a device further form the device in a compact size, by mounting gears, engaged with each gear on an output shaft, to an input shaft respectively through one-way clutches which can be independently operated. CONSTITUTION:Each gear 17-19 of equimultiple and the first and the second reduction is provided on one input shaft 15, and only one sprocket 12 is used for rotation in the normal direction, while a mounting space of each gear 17-19 is decreased. While each gear 31-33 engaged with each gear 17-19 is provided on also one output shaft 16, eliminating any necessity for providing an idle gear and/or a shaft between these gears. Further each gear 17-19 provided on the input shaft 15 is connected to the input shaft 15 by one-way springs 23-25, while operation of the one-way springs 24, 25 is controlled by ratchets 26, 27 and solenoids 28, 29 at the first and the second reduction copying. |
