The present invention relates to a pre-assembled bicycle frame tube with a built-in middle-motor, which also relates to the frame and its electric bicycle. The frame tube with a middle-motor of an electric bicycle includes a middle-motor, a gearbox and a tube body. The said middle-motor and the said gearbox are integrated and rotate coordinately. The lower part of the said frame tube is provided with a motor accommodating cavity and a built-in bottom bracket. The said middle-motor is detachably placed in the said motor accommodating cavity. After inserting the said gearbox axle through the said built-in bottom bracket, the said gearbox could be fixed into the said frame tube. By housing the middle-motor in the pre-assembled frame tube completely, the middle-motor can be installed simpler, efficiently, and economically, without using additional extra parts; and the streamlined beauty of the electric bicycle would be marked.
BICYCLE FRAME TUBE HAVING BUILT-IN MOTOR, BICYCLE FRAME AND ELECTRIC BICYCLE
FAHRRADRAHMENROHR MIT EINGEBAUTEM MOTOR, FAHRRADRAHMEN UND ELEKTROFAHRRAD
TUBE DE CADRE DE VÉLO AYANT UN MOTEUR INTÉGRÉ, CADRE DE VÉLO ET VÉLO ÉLECTRIQUE
2020-02-26
Patent
Elektronische Ressource
Englisch