Speed reducer for heavy industry mechanical crane

The utility model discloses a speed reducer for a heavy industry machinery crane, which relates to the field of cranes and comprises a base and dustproof mechanisms, the inner wall of the base is in screw connection with a fixing rod, the top end of the base is welded with a shell, the outer wall of the shell is coated with an anti-corrosion coating, and the dustproof mechanisms are mounted on two sides of the top end of the shell. A driving gear is installed on the inner wall of the shell, an access cover is connected to the surface of the shell through screws, a connecting shaft is installed on one side of the front end of the driving gear, and a connecting gear is installed on the other side of the front end of the driving gear. According to the utility model, the anti-corrosion coating is arranged, so that the anti-corrosion effect is maliciously provided for the shell of the speed reducer through the anti-corrosion coating made of epoxy resin paint when the speed reducer is used, the outer part of the sh