Motor with mechanical overload protection device

The utility model relates to motors with overload protection devices, in particular to a motor with a mechanical overload protection device. The motor comprises a motor hollow shaft, a torque shaft sleeved in the motor hollow shaft and a torque limiting coupler. An outer shaft sleeve of the torque limiting coupler is connected with the motor hollow shaft at the non-driving end of the motor through a spline. The torque shaft sleeved in the motor hollow shaft is connected with an inner shaft sleeve of the torque limiting coupler through a spline. An axial bolt on the end face of the torque limiting coupler is inserted onto the end surface of the torque shaft. Compared with existing mechanical protection structures, the motor with the mechanical overload protection device has the advantages that the motor can be unloaded in time to protect the motor from being damaged during overloading; and oil pressure standard setting of the torque limiting coupler is simple, precise and easy to control, the motor can recover