TRANSMISSION FOR MOTOR

The present invention relates to a transmission for a motor, and more particularly, to a transmission for a motor, which optimizes a transmission for outputting a rotational force only in one direction at different shifting ratios according to forward/reverse rotation directions of a rotational shaft of the motor while enabling a reverse input, accurately transmits the rotational force without slippage and has durability even upon use thereof for a long period of time. The transmission receives a rotational force from a rotational shaft 12 of a motor 10 to perform an output to an output shaft through shifting, and outputs the rotational force only in one direction at different shifting ratios according to forward/reverse rotation directions of the rotational shaft 12 of the motor 10. The transmission includes a driving shaft 100 having one or more one-way clutch contact surfaces 110 formed on an outer periphery of a certain region of the driving shaft 100; a dual one-way clutch 200 including a carrier 210 for accommodating forward restrictors 211 and reverse restrictors 212 in both faces of the carrier 210, respectively, wherein the forward and reverse restrictors 211 and 212 are radially equidistantly arranged with a predetermined phase angle difference, and a forward output ring 220 and a reverse output ring 230 disposed outside the forward restrictors 211 and the reverse restrictors 212, respectively, to be selectively rotated according to a rotation direction of the driving shaft 100; and a low-speed rotational force transmitting means 300 and a high-speed rotational force transmitting means 400 including a plurality of gears engaged with one another, wherein the low-speed rotational force transmitting means 300 and the high-speed rotational force transmitting means 400 receive the rotational force independently from the forward output ring 220 and the reverse output ring 230 of the dual one-way clutch 200 so as to rotate the output shaft 500 with the shifting ratios though different paths, whereby the dual one-way clutch 200 allows a reverse input in a direction opposite to a rotation direction of an output of the output shaft 500. Accordingly, the transmission improves reliability and shifting accuracy and maximizes marketability and market competitiveness.

The present invention relates to a transmission for a motor, and more particularly, to a transmission for a motor, which optimizes a transmission for outputting a rotational force only in one direction at different shifting ratios according to forward/reverse rotation directions of a rotational shaft of the motor while enabling a reverse input, accurately transmits the rotational force without slippage and has durability even upon use thereof for a long period of time. The transmission receives a rotational force from a rotational shaft 12 of a motor 10 to perform an output to an output shaft through shifting, and outputs the rotational force only in one direction at different shifting ratios according to forward/reverse rotation directions of the rotational shaft 12 of the motor 10. The transmission includes a driving shaft 100 having one or more one-way clutch contact surfaces 110 formed on an outer periphery of a certain region of the driving shaft 100; a dual one-way clutch 200 including a carrier 210 for accommodating forward restrictors 211 and reverse restrictors 212 in both faces of the carrier 210, respectively, wherein the forward and reverse restrictors 211 and 212 are radially equidistantly arranged with a predetermined phase angle difference, and a forward output ring 220 and a reverse output ring 230 disposed outside the forward restrictors 211 and the reverse restrictors 212, respectively, to be selectively rotated according to a rotation direction of the driving shaft 100; and a low-speed rotational force transmitting means 300 and a high-speed rotational force transmitting means 400 including a plurality of gears engaged with one another, wherein the low-speed rotational force transmitting means 300 and the high-speed rotational force transmitting means 400 receive the rotational force independently from the forward output ring 220 and the reverse output ring 230 of the dual one-way clutch 200 so as to rotate the output shaft 500 with the shifting ratios though different paths, whereby the dual one-way clutch 200 allows a reverse input in a direction opposite to a rotation direction of an output of the output shaft 500. Accordingly, the transmission improves reliability and shifting accuracy and maximizes marketability and market competitiveness.