Cooling structure of injection pump motor

The utility model provides a heat radiation structure of an injection pump motor, and belongs to the technical field of machinery. The problem that an existing injection pump motor is poor in heat dissipation is solved. The injection pump motor heat dissipation structure comprises a machine barrel, a rotating shaft arranged in the machine barrel and a support fixedly arranged at the front end of the machine barrel, the front end of the rotating shaft penetrates through the support, a guide ring matched with the inner wall of the machine barrel is fixed in the front end of the machine barrel, and the guide ring and the machine barrel are coaxially arranged; a cavity allowing the rotating shaft to penetrate through is formed among the machine barrel, the guide ring and the support, and an exhaust port enabling the cavity to be communicated with the outside is formed in the support; and the cavity is internally provided with a heat dissipation fan blade which is connected with the rotating shaft and enables gas