Pump shaft structure

The invention belongs to the technical field of tools for a water pump, and particularly relates to a water pump shaft structure. The water pump shaft structure comprises a smooth end and a spline tooth end which is formed in a one-off mode through an extruding and drawing process. Multiple outer teeth are arranged on the outer wall of the joint of the smooth end and the spline tooth end. An impeller locating sleeve is arranged at the joint of the smooth end and the spline tooth end. Inner teeth which are located at the center and formed in a one-off extruding and drawing mode are arranged on the inner wall of the impeller locating sleeve. The inner teeth are matched with the outer teeth. The water pump shaft structure has the advantages that the strength of the pump shaft can be guaranteed, the parallelism and the strength of locating of an impeller can also be guaranteed, the machining time is shortened, and the process is simple and rapid.