Main speed reducer shell of dump truck for mining

The utility model discloses a main speed reducer shell of a dump truck for mining, which comprises a main speed reducer shell body and is characterized in that the outer surface of the shell body is in a spherical structure; a crescent support frame is arranged in the middle of the spherical structure in a smooth transition manner; a support cylinder is smoothly connected outside the spherical structure; and a reinforcing rib is arranged on the inner surface of the shell body. In the utility model, the outer surface of the main speed reducer shell body is arranged into a spherical structure; the support frame is smoothly arranged inside the spherical structure; the support cylinder is smoothly connected outside the spherical structure; and the reinforcing rib is arranged on the inner surface of the shell body, thus satisfying the requirements on the support strength and the rigidity of the shell body, simplifying the casting technique, eliminating the stress concentration in casting, and improving the casting