Direct-current brushless outer rotor pump motor

The utility model discloses a direct current brushless outer rotor pump motor. The motor comprises a base; the eccentric wheel assembly is fixed to the base, the eccentric wheel assembly comprises an eccentric shaft, and the eccentric shaft comprises a first shaft section, a second shaft section and a third shaft section which are integrally formed; the output end of the driving assembly is connected with the shaft end of the first shaft section, the driving assembly comprises a stator part and a rotor part, the rotor part comprises a machine shell and a magnetic ring, the stator part comprises a stator iron core, an annular wire frame and a side plate, and a wire harness via hole is formed in the side plate. According to the eccentric shaft, the structure that the first shaft section, the second shaft section and the third shaft section are integrally formed is adopted, so that the problem of press fitting and machining difficulty caused by concentricity errors of the eccentric sleeve and the eccentric shaft