Fully-closed hub brake assembly

The utility model relates to the technical field of brakes, in particular to a fully-closed hub brake assembly which comprises a brake cover body, a brake cam shaft is arranged on the brake cover body, a brake rocker arm is fixedly sleeved outside the brake cam shaft, a sealing shell is fixedly installed on the brake cover body, the brake rocker arm is located inside the sealing shell, and a brake cylinder is fixedly installed on the brake cover body. And a sealing cover plate is fixedly installed at the top of the sealing shell, and a threaded threading pipe is fixedly connected to one side of the sealing shell. According to the totally-closed hub brake assembly, the sealing shell and the sealing cover plate are arranged outside the brake rocker arm, the brake rocker arm is sealed, water and silt are prevented from entering the brake cover body along the cam shaft hole, the braking effect is guaranteed, and the safety of a driver is improved; and a first rubber pad is arranged between the sealing shell and t