Lightweight combined cross beam assembly of heavy-duty commercial vehicle

A light-weight combined cross beam assembly of a heavy-duty commercial vehicle relates to the technical field of chassis of heavy-duty commercial vehicles, and adopts the technical scheme that the light-weight combined cross beam assembly comprises a cross beam, a first connecting component and a second connecting component are symmetrically arranged at two ends of the cross beam, and the first connecting component and the second connecting component are L-shaped; the first connecting assembly is located above the second connecting assembly, the first connecting assembly comprises a first connecting part and a first mounting part, the second connecting assembly comprises a second connecting part and a second mounting part, and the first mounting part is connected with the upper surface of the cross beam through the mounting assembly. According to the technical scheme, the combined beam assembly has the advantages that the integrated casting pipe beam and the split gradient beam connecting plate are adopted, t