System for the electrical propulsion of light-weight wheeled transportation vehicles

A system of electrical engine which is used for the propulsion of bicycles, said system

• is applied to any ready and complete functional bicycle frame without affecting the distance from the ground and the width of the bicycles crank set's axle,
• is fastened on parallel supporting plates which are fastened on the bottom bracket of the bicycle with mounting brackets, and
• comprises at least three speed reduction stages,
• an output gear of a shaft of a motor is directed always towards the opposite side of an output gear of a shaft of the engine,
• a first speed reduction stage and a second speed reduction stage are always on the same side, and
• an output pinion shaft of the motor is always on the opposite side—of the last reduction stage,
• the motor is a low weight, small size motor,
• a planetary drive directly mounted on the output pinion shaft, as the first stage of speed-reduction,
• at least two gears constitute the second stage of speed reduction, and
• a one-way bearing,
• wherein the shaft of the engine transmits the power from the previous before the last reduction stage to the last reduction stage, the shaft of the engine is parallel to the bicycle's bottom bracket and to the axle of the motor,
• the last reduction stage which comprises at the least two gears, and the last gear is on the opposite side of the output pinion shaft,
• the motor's output shaft is always directed on the opposite side of the last reduction stage.