Abstract: A securing device for securing a mid-mount motor of an electric bicycle includes a casing composed of a first part and a second part which is snugly mounted to the first part by locking members. The motor is accommodated in a room of the casing. The second part includes an end face facing the first part. A slot is formed in the second part and has a hole formed in the inner bottom of the slot. A locking member extends through a flange of the first part and the hole in the second part, and is connected to a nut located in the slot. The nut does not rotate to ensure that the first and second parts are securely connected with each other. The heat from the motor is transferred to the bike frame. Multiple deformation sensors are installed to the casing to provide precise detection data to the processor.

Abstract: The bicycle transmission device includes a hollow tube extending through the bottom bracket and two caps are connected to two ends of the hollow tube. A motor unit has two extensions and multiple fixing assemblies, wherein the extensions are positioned by the caps. The fixing assemblies fix the motor unit to the underside of the bicycle. A shaft extends through the hollow tube and a first one-way transmission device is connected to one end of the shaft. A chainwheel and a first passive wheel are connected to the other end of the transmission shaft. Two cranks are connected to two ends of the transmission shaft. A motor located in the motor unit and has a second passive wheel. The first and second passive wheels transmit energy via the belt. The present invention reduces the space required for the motor and balances the weight of the bicycle.

Abstract: A driving mechanism for motorized bicycle is provided. The driving mechanism comprises a motor driving transmission device, a front driving sprocket and a pedal driving transmission device. The motor driving transmission device inwardly includes a motor shell, a magnet stator, an electromagnetic wire-coiled rotor and a cylindrical hollow rotatable shaft. The front driving sprocket has a transmission rotatable sleeve disposed therein for insertion of the hollow rotatable shaft there between. The pedal driving transmission device includes a pair of pedal cranks and a pedal driving shaft passing through the transmission rotatable sleeve and hollow rotatable shaft. First and Second single direction irreversible transmission devices are arranged such that either the motor driving transmission device or pedal driving transmission device may drive the transmission rotatable sleeve and front driving sprocket in proper rotational direction.

Abstract: A driving mechanism for motorized bicycle is provided. The driving mechanism comprises a motor driving transmission device, a front driving sprocket and a pedal driving transmission device. The motor driving transmission device inwardly includes a motor shell, a magnet stator, an electromagnetic wire-coiled rotor and a cylindrical hollow rotatable shaft. The front driving sprocket has a transmission rotatable sleeve disposed therein for insertion of the hollow rotatable shaft there between. The pedal driving transmission device includes a pair of pedal cranks and a pedal driving shaft passing through the transmission rotatable sleeve and hollow rotatable shaft. First and Second single direction irreversible transmission devices are arranged such that either the motor driving transmission device or pedal driving transmission device may drive the transmission rotatable sleeve and front driving sprocket in proper rotational direction.