Braking device of automatic driving motor sweeper

The utility model relates to the technical field of vehicle braking devices, and discloses an automatic driving sweeper braking device which comprises a brake drum, an axle installed in the brake drum and a chassis connected to the side end of the axle in a sleeved mode. The brake shoes are rotationally installed on the two sides of the side end of the chassis, the wheel cylinders are fixedly connected to the middles of the two brake shoes, and locking mechanisms are arranged at the side ends of the brake shoes; the locking mechanism comprises two integrated parts which are fixed to the side ends of the brake shoes correspondingly, oil storage cavities are formed in the integrated parts and filled with kerosene media, moving parts are slidably installed at the side ends of the oil storage cavities and penetrate out of the oil storage cavities, and the moving parts are connected with the brake shoes through the kerosene media. An annular clamping groove is formed in the inner wall of the brake drum, and the sl