Special-shaped coupler for rolling mill

The utility model discloses a special-shaped coupler for a rolling mill, which belongs to the technical field of rolling mill accessories and comprises a motor, a reduction gearbox and a first connector located on an output port of the reduction gearbox, the front surface of the first connector is connected with a special-shaped connector, and a plurality of outer holes are formed in the special-shaped connector at equal intervals. And a fixing bolt is assembled on the outer hole, so that the special-shaped connector is fixedly connected with the first connector. A special-shaped coupler is machined, the inner diameter of the special-shaped coupler corresponds to two screw holes of an original host, the outer diameter of the special-shaped coupler corresponds to a reduction gearbox of the host, and meanwhile in order to guarantee the strength of the special-shaped coupler, 45 # steel is selected as a material for manufacturing the special-shaped coupler for die casting. The second main machine with the shaft