Withdrawal and straightening speed reducer convenient to maintain

The utility model discloses a withdrawal and straightening speed reducer convenient to maintain, which comprises a speed reducer box-shaped shell and a speed reducer fixing trunnion arranged on one side of the speed reducer box-shaped shell, and an oil injection component is arranged on the other side of the speed reducer box-shaped shell; a high-speed shaft assembly is arranged in the speed reducer box type shell and penetrates through and extends out of the upper end of the speed reducer box type shell, a dustproof and waterproof assembly is arranged at the position, where the high-speed shaft assembly extends out, of the speed reducer box type shell, the high-speed shaft assembly is driven by external equipment, and the bottom end of the high-speed shaft assembly is connected with a high-speed shaft gear. The high-speed shaft assembly is fixed to the speed reducer box-shaped shell, a high-speed shaft gear is meshed with the worm assembly, the worm assembly is provided with a turbine assembly on the side, a