Double-piece round girder of heavy commercial vehicle

The utility model discloses a heavy-duty commercial vehicle double-piece round girder which comprises a piece-shaped element girder, a connecting piece, a left combined support and a right combined support, the piece-shaped element girder is integrally in an arch shape, and cantilevers extend out of the bottom of the left combined support and the bottom of the right combined support. Mounting hole positions of the sheet-shaped element beams are reserved in the cantilevers, and the cantilevers are connected with the arch-shaped sheet-shaped element beams to form a frame type structure; a plate spring and a steering transition swing arm are integrated on the left combined support and the right combined support. The utility model has the advantages of simple structure, high processing efficiency, light weight, low cost and convenience in assembly, effectively reduces the types of parts, reduces the risk of cracking fault, enables the whole vehicle to be more compact and reasonable in arrangement, is convenient t