Externally-hung electronic lock of motor

The utility model provides an externally-hung electronic lock of a motor, which is convenient to repair and replace and comprises a lock case, a drive motor, a transmission mechanism, a bolt component, a lock head component and a control circuit board, wherein the transmission mechanism, the bolt component, the lock head component and the control circuit board are fixedly arranged in the lock case; the control circuit board is communicated with the drive motor, the transmission mechanism is formed by mutually meshed and linked gears, the drive motor and the bolt component are respectively linked with the transmission mechanism, and the bolt component is also provided with the lock head component linked with the bolt component; and the externally-hung electronic lock is characterized in that the drive motor is arranged outside the lock case, the lock case is provided with a motor shaft installing hole through which a shaft on the drive motor penetrates, the part where the motor shaft penetrates into the lock c