Towing axle adopting combined axle structure

The invention discloses a traction axle adopting a combined axle structure, which comprises a combined axle, the combined axle comprises an axle and a box-shaped seat sleeved on the axle, the two endsof the axle are respectively provided with a tire assembly, and the box-shaped seat is connected with a traction frame along the radial direction of the axle; one end of the box-shaped seat along theshaft is sleeved with a positioning sleeve, two machining planes are oppositely arranged on the portion, between the positioning sleeve and the box-shaped seat, of the shaft, a strip-shaped positioning block is welded to each machining plane, and each strip-shaped positioning block is welded to the corresponding positioning sleeve and the box-shaped seat so that the box-shaped seat can not slidein the axial direction and rotate in the radial direction of the shaft. On the basis that the overall structure of the axle is not changed, the tractor axle structure is optimized to be a manufacturing mode of assembling after