China is a large country of coal production and consumption. Coal transportation has always been one of the sources of trailers in the north. Especially in the heating season, the demand for coal has increased accordingly. Some car owners seem to see business opportunities and want to join them, but they have made difficulties with transportation vehicles of different models: what kind of semi-trailer is more suitable for transporting coal?

Generally, coal pulling semi-trailer needs to have excellent bearing capacity and driving force, and there are many double drive tractors. As for the semi-trailer, it is generally required to prevent spillage and facilitate loading and unloading. In summary, it is "loading + unloading". At present, it is mainly divided into self unloading type and van type:

1. Dump semi-trailer.

It is especially suitable for the transportation of coal, ore, construction materials and other goods. In terms of structure, the dump semi-trailer usually adopts the dump mode of rollover and backward, which can improve the transportation efficiency of scattered goods. Its frame and carriage longitudinal beam have the advantages of high strength and strong lifting force. It can not only undertake the engineering transportation task, but also undertake the transportation task of light and medium-sized loose goods.

2. Van semitrailer.

Coal can also be transported by van type semi-trailer. Compared with dump semi-trailer, the biggest advantage of van type semi-trailer is the closeness of carriage, which can reduce the impact of goods due to environment or weather. The car top has closed type, push open type, open type, open tarpaulin pole type, etc., which can meet different transportation needs.

Although there are not many special requirements for trailers in coal transportation, as a cargo vehicle, the load-bearing, braking and other safety performance must fully meet the standards. In particular, with the increasing competition in the coal transportation industry, the maintenance cycle of vehicles must also be taken into account.

At present, the maintenance mileage of most tractor engines in China can reach 100000 km, the maintenance cycle of gearbox can reach 200000 km, and the maintenance mileage of drive axle is 100000 km, which can basically meet the use needs of vehicle owners. However, compared with tractors, the maintenance cycle of semi-trailer walking units still stays at 20000-30000 km, which is seriously mismatched with the maintenance cycle of tractors, Even if the tractor is in good condition, the trailer will be stopped once it is maintained.

As an important part of trailer traveling unit, axle upgrading is urgent. Darong heavy industry group is the first enterprise in Liangshan to start mass production of integrated axle tubes. With 20 years of industry experience, Darong heavy industry group has made great progress in the fields of axle lightweight design, heavy load improvement and extension of maintenance cycle. Compared with traditional products, the axle produced by Darong group has a weight reduction of 15-20%, and the maintenance cycle can be extended to 2 years or 50000 km. It is durable, manufacturing resistant and has strong load capacity, With excellent quality and high cost performance, it has accumulated a good reputation in the industry.