Transmission device for e.g. bicycle, has toothed chain wheel whose rotation, by sprocket meshing with toothed sector, is transmitted to wheel drive via two sprockets mounted on wheel axle shaft and planetary gear wheels, to drive wheel

摘要

The device has a toothed chain wheel (4) with an interposed freewheel device (18), rotated by a sprocket (6) meshing with a toothed sector located at an end of an arm articulated on a vehicle and extending into a lever on which a user acts. The rotation of the wheel (4) is transmitted to a wheel drive (13) through sprockets (14, 15) mounted on a wheel axle shaft (2) and planetary gear wheels (16, 17) to drive a vehicle wheel (1).