Radial positioning structure of output revolving gear

The utility model relates to a radial positioning structure of an output revolving gear, comprising a small gear. The small gear is arranged on the output shaft of a transmission device through a spline pair, a shaft-end positioning baffle is fixed on the shaft head of the output shaft of the transmission device through bolts, both ends of the inner wall of the small gear are configured with two spigots, the spigot on one end is connected with a shaft step of the output shaft of the transmission device, the spigot on the other end is connected with the shaft-end positioning baffle of the output shaft of the transmission device, the two spigots play the role of radial positioning on the small gear, the splines connection between the small gear and the output shaft of the transmission device only plays the role of transmitting torque, and the splines are in clearance fit. The utility model has the advantages of reliable radial positioning of the small gear and uniform load distribution on tooth surface.