ELECTRICALLY MOTORIZED WHEEL, PARTICULARLY FOR BICYCLES, WITH INCORPORATED MECHANICAL GEAR CHANGE.

摘要

PCT No. PCT/EP92/01824 Sec. 371 Date Jun. 15, 1994 Sec. 102(e) Date Jun. 15, 1994 PCT Filed Aug. 10, 1992 PCT Pub. No. WO93/03956 PCT Pub. Date Mar. 4, 1993An electrically motorized wheel, particularly useful for bicycles, has a hub with an electric motor housed therein. The motor is fixed with respect to the axis of rotation of the wheel and has a drive shaft perpendicular to the wheel axis which engages a crown wheel inside the hub through freewheel mechanisms and at least one gear reduction mechanism so that the motorized wheel may operate at two different gear ratios in one direction upon reversal of the motor direction and operate in a freewheeling mode when no power is supplied or when the bicyclist applies manual power.