Patent attributes
The present disclosure provides a motor overload protection device that includes a driving gear, a loading wheel, and at least one protecting gear unit rotatably fixed to the loading wheel. The loading wheel defines a central through hole for rotatably receiving a rotor of a motor. The driving gear is fixed on the rotor. The at least one protecting gear unit is rotated by the rotor. A resistance between the at least one protecting gear unit and the loading wheel is predetermined. When the load on the loading wheel is less than or equal to the maximum load of the motor, the resistance keeps the loading wheel and the at least one protecting gear unit together rotating around the rotor of the motor. When the load is greater than the maximum load of the motor, the at least one protecting gear unit rotates relative to the loading wheel.
