Patent ID: 7098563

Claim:
A drive system, comprising: a motor unit, including a hollow motor main shaft, an auxiliary shaft co-axially inserted within the hollow motor main shaft, the auxiliary shaft being adapted to be driven manually, a motor stator, a motor rotor disposed inside of the motor stator, the motor rotor being adapted to revolve freely within the motor stator and being connected to the hollow motor main shaft, the auxiliary shaft being adapted to revolve freely within the motor main shaft, and a plurality of bearings disposed to support respective ends of the motor main shaft and the auxiliary shaft; a load rotation part revolvingly supported by a bearing; first and second transmissions having different speed ratios and being respectively provided between the load rotation part and the motor main shaft, and the load rotation part and the auxiliary shaft, to jointly drive the load rotation part, the first transmission being connected to the motor main shaft to drive the load rotation part to thus form a first power train, while the second transmission being connected to the auxiliary shaft to drive the load rotation part to thus form a second power train; and two one-way transmission units respectively provided between the load rotation part and the first transmission, and between the load rotation part and the second transmission, so to transmit revolving power from the motor main shaft or the auxiliary shaft to the load rotation part, and which prevent the motor main shaft or the auxiliary shaft from receiving an inverse transmission force from a direction of the load rotation part.