Patent ID: 8241160
Filing Date: 2012-08-14
Classification: B62M

Abstract:
1. A transmission for use in a motor and a pedal to allow power from a motor and a sprocket to be outputted to a hub shell through a transmission device, wherein the transmission device includes: a carrier having one side meshed with the motor and the other side coupled with a driver in a one-way or fitting manner, the driver being connected to the sprocket; a ring gear producing a gear shift when connected to the carrier, thereby transferring the power to the output hub shell; a first speed pawl mounted in the carrier and directly coupled with the ring gear; a multistage planetary gear mounted in the carrier to accelerate the ring gear; second and third speed sun gears engaged with the multistage planetary gear and supported by a shaft in a slide contact manner, thereby being selectively confined to the shaft to enable a gear shift; a transmission control unit manipulated by an external speed change lever to selectively control a second speed pawl and a third speed pawl; and a slide ring for allowing rotary power of the driver to be selectively received in the transmission control unit.