| 摘要 |
Electric gear motor system for vehicles with two or three wheels, of the type externally installable on the bottom bracket of the vehicle itself. The system is applied to vehicles with two and three wheels, of the type comprising a standard bicycle frame (1, 101) with levers (6) and pedal cranks for the transmission of the advancing motion of the vehicle. Said gear motor unit is of "outrunner" type, i.e. with rotor (24, 50, 14, 124, 150, 114) outside the stator (12, 112), and the gear box is of planetary type, nested inside the stator cavity; the system is characterized in that it is installed coaxially with the bottom bracket of the frame (1, 101), by means of a hub 19, 119 suitably shaped in a manner so as to be inserted in the cavities of the bottom brackets present on the standard bicycle frames, in a manner such that the revolution axes of the motor, the gear box and the pedal cranks coincide; the motor is situated outside the frame. Two preferred embodiments are described and claimed. |
