Connecting device of servo motor

The invention discloses a connecting device of a servo motor. The device comprises a connecting sleeve, an inner sealing ring and an outer sealing ring, a hollow servo motor, and a reducer cabinet. The connecting sleeve is connected with the hollow servo motor through a connecting bolt. The connecting sleeve is internally provided with an internal spline. A gear shaft is externally provided with a spline. The connecting sleeve and the gear shaft are meshed through the splines. The junction of the connecting sleeve and the end of the gear shaft is provided with the inner sealing ring, and the junction of the connecting sleeve and the servo motor is provided with the outer sealing ring. The servo motor and the reducer cabinet are fixed through fixed bolts. The device makes the servo motor adapt to microscale bounce brought about by manufacturing and assembling of the gear shaft, so as to improve reliability and stamping precision of the servo motor, and prolong service life of the servo motor. All connections in the device are mechanical connections. The device is simple in structure, convenient in manufacturing and installation and high in transmission efficiency, and production cost is reduced.