Center drive device with overload protection function

The utility model relates to a center drive device with overload protection function, including safe round pin, first shaft coupling, second shaft coupling, reducer output axle, transmission shaft, frame and bearing, be fixed with the bearing on the frame, install the speed reducer on the bearing, install first shaft coupling through the key in that reducer output is epaxial, be equipped with the transmission shaft in the below of reducer output axle, install the second shaft coupling at the transmission shaft through the key, the second shaft coupling is fixed mutually through safe round pin with first shaft coupling, still be fixed with the switch mounting board on the bearing, be fixed with proximity switch on the switch mounting board, seted up on the second shaft coupling and triggered the breach, triggered breach and proximity switch cooperation. The universal connecting device of the flexible shaft has a simple structure and is convenient in use, the utility model discloses not only can not receive the