| 摘要 |
The present invention provides a bicycle comprising a bicycle frame; front and rear wheels; a motor which is arranged on at least one of the front and rear wheels and supplies power to the wheel; and a transmission for a motor vehicle, which is connected to the motor and changes the rotational speed of the motor. The bicycle frame includes forks which extend toward only one side of the wheel having the motor arranged thereon. The transmission for a motor vehicle includes a transmission shaft which is supported by the bicycle frame to be able to rotate and is arranged coaxially with a rotary shaft of the motor and has a clutch connected to one of multiple planet gear sets; the clutch which is connected to the end of the rotary shaft and comprises multiple clutch connection surfaces; multiple planet gear sets which comprise a sun gear including sun gear connection surfaces corresponding to the clutch connection surfaces, wherein the sun gear is arranged coaxially with the clutch, a planet gear which is connected to the sun gear and is fixed on a carrier and a ring gear which is connected to the planet gear and the wheels. The clutch connection surfaces of the clutch are stepped from each other on concentric circles around the center of the rotary shaft. The transmission shaft has a hollow formed therein. The central shaft is fixed on the forks, is connected inside the transmission shaft, and fixes the carrier and the motor which fixes the planet gear of the planet gear set. The rear side of the motor and the transmission shaft are connected to a housing which includes a bearing. The housing is connected to the ring gear of the planet gear set and the wheel, thereby rotating together with the wheels around the central shaft carrier and the motor. |
