Three lines and six axles are a special type of semi-trailer. Their vehicle length, width and load capacity are different from those of ordinary semi-trailers. They are commonly known as "crawling all over the ground", and the transportation weight can reach 100 tons or even hundreds of tons. They are the only "100 ton king" model that can meet the requirements of household and high-speed.

The three-track six-axle semi-trailer is generally used for the transportation of large goods, especially for those goods that are out of limit, overweight, bulky and cannot be disassembled, such as extra-long goods, extra-wide goods, extra-high goods and overweight goods.

Compared with the ordinary semi-trailer, the advantages of the three-line six-axle semi-trailer are that the load capacity is large, the load of the wheel axle is relatively uniform, and the longitudinal tie rod adopts the double-row form, which can reduce the left and right swing amplitude of the vehicle during driving.

In terms of length, the three-track six-axle semi-trailer can be divided into 13m, 13.75m, 15m, 16m, 16.5m, 17.5m, 18m, 50m, 22m, etc.

According to different transportation needs, it can be divided into three lines and three axes, three lines and six axes, four lines and eight axes, five lines and ten axes, etc. Generally, three lines and six axes can transport goods within 80t, four lines and eight axes can transport goods within 100t, five lines and ten axes can transport goods within 120t, and so on.

It is worth noting that, except for the three-line six-axle semi-trailer, which can be registered, other models need to apply for temporary license plates, which are generally valid for only one month, and need to be reissued in advance after exceeding the limit. In addition, it is also necessary to operate in accordance with the regulations in terms of transportation routes or transportation time, because some goods may exceed the specified limits of highway alignment and bridge and culvert capacity, and need to bypass, rebuild or even remove obstacles in advance.

From the perspective of appearance, there are three main types of three-wire six-axle semi-trailer: flat type, ladder type and groove type:

The flat type mainly refers to the high and low board, the length of the high board is about 3-4m, the length of the low board is about 10-15m, the width of the board is about 3m, the height from the ground is about 0.8m, and the height difference is generally 30 cm;

Ladder type refers to the semi-trailer with hydraulic ladder at the rear of the vehicle, which is mainly used to transport construction machinery and equipment such as excavators, presses, bulldozers, etc. The hydraulic ladder can facilitate the equipment to get on and off the vehicle, and drive directly from the ground to the vehicle;

Groove type means that the semi-trailer cargo platform is curved and concave, which is used to load large tank equipment or other large equipment, and is more convenient to fix.

Among flat-plate and ladder type large-cargo transport vehicles, some vehicles with relatively small load capacity belong to three lines and three axles, that is, three rows of wheels are installed on the semi-trailer, one row is only installed on one axle, a total of 12 tires are installed, and the weight that can be transported is about 45t; Three lines with six axles, four lines with eight axles and five lines with ten axles are installed in a row with two axles; With the increase of the number of axles, the load carrying capacity of multi-line and multi-axles will become stronger. For example, three axles are installed in a row, that is, three lines and nine axles, four lines and twelve axles. And so on. The "World's First Ring" was transported from Jinan to Weifang Port a few days ago, and this is the model used.

Because the goods transported by three-line six-axle semi-trailer are relatively special, the requirements for vehicle performance are higher, especially for chassis components, which are directly related to vehicle load bearing, so it is necessary to select the special products of three-line six-axle semi-trailer.

The three-line six-axle axle axle produced by Darong Group is made of high-strength alloy thickened steel pipe axle body, mechanically connected suspension, with rated load of about 80t and dead weight of 3000kg. It can be customized according to the actual needs of customers.