Double-curved-surface gear ring

The utility model discloses a double-curved-surface gear ring which is characterized in that a gear shaft is sleeved with a gear, a key groove is formed in the lower end of the gear shaft, a key pin is inserted into the key groove, a fixing block is fixedly welded to the lower end of the key pin, a guide rod is fixedly welded to the surface of the gear, a screw is connected to the interior of the fixing block through threads, and a bevel gear is connected to the gear in a meshed mode. According to the double-curved-surface gear ring, the screws are dismounted through rotation, the fixing blocks lose constraint, the fixing blocks can be conveniently moved outwards to quickly dismount key pins, the maintenance convenience is improved, the directions of the fixing blocks can be guided through the design of the guide rods, and the screws can be conveniently aligned to screw holes for quick mounting; the inner hexagonal screw is rotationally detached, the insertion rod is not bound, the bevel gear can be detached