Trailer axle provided with aluminum alloy hubs and steel composite brake discs

The utility model discloses a trailer axle provided with an aluminum alloy hub and a steel composite brake disc. The trailer axle solves the problems that in the prior art, a hub on a trailer axle is difficult to disassemble, and maintenance time is long. The double-wheel brake comprises brake calipers and further comprises a shaft body, wheel hubs are rotationally connected to the two ends of the shaft body, double-wheel steel is connected to the outer sides of the wheel hubs, and brake discs matched with the brake calipers are connected to the inner sides of the wheel hubs. A sealing piece is connected to the inner ring of the hub and located at the end of the shaft body. The shaft body is further connected with vibration isolation assemblies which are symmetrically arranged. The hubs are rotationally connected to the two ends of the shaft body through the bearings, the brake discs and the double-wheel steel are connected to the hubs, heavy-weight bearing of the trailer is achieved, the brake discs are expo