DRIVE DEVICE FOR AN ELECTRIC BICYCLE AND ELECTRIC BICYCLE

原文（中国語）

A drive device for an electric bicycle has a shaft and a redirecting gearbox configured for coupling with an electric motor and the shaft so that a torque is transmittable from the motor to the shaft via the gearbox. The gearbox has a first gear element rotatable about a first axis and a second gear element coupled to the first. The second gear element can rotate about a second axis running at an angle to the first axis. A torque is transmittable from the first gear element to the shaft through a coupling therebetween. The device is configured to rotate the shaft in a first rotational direction relative to the first gear element. The first gear element is axially displaceable relative to the second gear element, parallel to the first axis, within predetermined limits, the gear elements remaining coupled to one another within the predetermined limits.