| 摘要 |
An electrically-driven bicycle comprises a bicycle frame. A bottom bracket shell is provided at a junction between a down tube and stays of the frame. An electric motor is connected to the bottom bracket shell, the electric motor having a hollow drive shaft with an output end projecting to a first side of the bottom bracket shell. A transmission connects the drive shaft to one of the a wheel and a drive train of the bicycle, to transmit a drive of the electric motor to the rear wheel. A crank set has an axle rotatably mounted within the hollow drive shaft for rotating independently from the drive shaft. Means are provided for transmitting pedaling actuation on the crank set to the rear wheel, the means being on the second side of the bottom bracket shell. An electrical drive system for bicycle is also provided. |
