Power transmission overload protection device of motorized winch

The utility model discloses a power transmission overload protection device of a motorized winch. The power transmission overload protection device comprises a power input assembly and a power outputshaft sleeve. The power input assembly comprises an elastic connecting block, a torsion input shaft sleeve and a torsion cover, clamping grooves are formed in the opposite ends of the torsion input shaft sleeve and the torsion cover, and the elastic connecting blocks are contained in the clamping grooves. The torsion seat is provided with an opening structure; the first end of the power output shaft sleeve is installed in the opening structure, and the second end of the power output shaft sleeve penetrates through the torsion base and extends out of the torsion base. According to the power transmission overload protection device, the torsion limiting type structural design is adopted, the transmission efficiency is high, stability and reliability are achieved, the overload protection function on a power system can