The skeleton semi-trailer truck is welded by the longitudinal beam, cross-beam and front and rear end beams. The longitudinal beam is made of high-quality steel plate 16Mn submerged arc welded into I-shape (the main dimensions are 450 and 500), the cross-beam is made of high-quality steel plate into a groove, and the front and rear end beams are welded to rectangular sections. An integral long beam is set at the middle container locking device to improve the bearing capacity of the container locking device.
Compared with "monobloc" vehicles, semi trailers can improve the comprehensive economic benefits of highway transportation. The transportation efficiency can be increased by 30-50%, the cost can be reduced by 30-40%, and the fuel consumption can be reduced by 20-30%. More importantly, the use of semi trailers can also promote the organizational form of logistics in China to a certain extent.