Brake structure of axial magnetic field outer rotor hub motor

The utility model belongs to the technical field of wheel hub motors, and particularly relates to a brake structure of an axial magnetic field outer rotor wheel hub motor, which comprises an outer rotor and a limiting block, a brake disc is contacted on the outer rotor, a limiting ring is fixedly connected on the brake disc, the limiting block is contacted with the outer rotor, a sliding rod is fixedly connected on the limiting block, and the sliding rod is fixedly connected on the limiting ring. A spring is arranged on the outer side of the sliding rod, a clamping block is fixedly connected to the limiting block, a clamping groove is formed in the outer rotor, and the clamping block is slidably connected into the clamping groove. By arranging the limiting ring, the sliding rod, the spring, the limiting block and the like, the limiting block on the sliding rod can be driven to move through the elastic force of the spring, so that the limiting block drives the clamping block to be clamped into the clamping gro