The on-board part of low flat semi-trailer has no breast board and is widely used. It is mainly used for medium and long-distance freight transportation. The frame of series semi-trailer is of through beam structure, and the longitudinal beam adopts flat and movable gooseneck type. The web height is from 400mm to 550mm, and the longitudinal beam is welded by automatic submerged arc welding
The on-board part of low flat semi-trailer has no breast board and is widely used. It is mainly used for medium and long-distance freight transportation. The frame of series semi-trailer is of through beam structure, and the longitudinal beam adopts flat and movable gooseneck type. The web height is from 400mm to 550mm, the longitudinal beam is welded by automatic submerged arc welding, the frame is shot blasted, and the transverse beam penetrates into the longitudinal beam and is welded as a whole. It is composed of series dry plate spring and suspension support. It has reasonable structure and strong rigidity and strength. It is used to support load and slow impact. Low flat semi trailers are usually used to transport heavy vehicles (such as tractors, buses, special vehicles, etc.), rail vehicles, mining machines, forestry machines, agricultural machines (such as excavators, bulldozers, loaders, pavers, cranes, etc.) and other heavy goods. The lower the center of gravity, the better the stability and safety, The stronger the ability to transport ultra-high goods and pass overhead obstacles. The structure and loading of low flat panel semi-trailer usually adopt concave beam (or well) frame, that is, the front section of the frame is gooseneck (the traction pin of the front section of gooseneck is connected with the traction saddle on the tractor, and the rear end of gooseneck is connected with the semi-trailer frame), the middle section is cargo platform (the lowest part of the frame), and the rear end is wheel frame (including wheels). When loading the mechanical equipment on the low flat semi-trailer, the mechanical equipment is usually loaded from the rear end of the semi-trailer, that is, the mechanical equipment is moved from the rear wheel frame or the wheels are removed, and then the mechanical equipment is fixed on the semi-trailer. The walking structure of low flat plate semi-trailer is made of high-strength international steel, with light vehicle weight, and ensures its anti distortion, anti-seismic and anti bumping capacity to meet different road bearing capacity.
