1. ChassisThe frame is mainly composed of girder - welded I-beam, support beam, connection beam, side beam, lock, traction pin connection device, panel, etc.The side beams are generally channel steel or bending pieces. At present, most trailers use channel steel. There will be more side beams for…

1. Introduction the present situationWith the improvement of the highway and its infrastructure and the rapid development of the national economy, the demand for semi-trailer with high transport efficiency is growing rapidly in recent years.Among the components of the semi-trailer, the tire is the…