Breast board semi-trailer refers to a semi-trailer whose cargo carrying part is a breast board structure. Its carriage is open and composed of a row of breast boards, which is mainly suitable for medium and long-distance transportation.

It can be said that the rail car is the earliest type of car in China. For example, the old Jiefang Truck is mainly based on the rail car. As a transport vehicle, the railing carriage can carry a wide range of goods. Almost all goods with super length, width and height can be loaded, such as steel, wood and stone. Especially for the transportation of large equipment, the barrier to loading and unloading is small, so it can load almost all goods within the bearing range.

However, from a professional point of view, the reason why the fence semi-trailer can carry such a rich variety of goods is inseparable from the cooperation of high-level drivers and loaders. They need to place goods, cover tarpaulins and kill ropes, which all require physical strength, experience and technology. If the goods are not loaded properly, or the driver does not fix the goods properly, It can easily lead to safety problems.

With the rapid development of domestic logistics industry, less than carload goods, agricultural and sideline products and other special goods are becoming more and more popular, and the models are becoming more and more abundant. Compared with the traditional fence semi-trailer, the bin type or van type semi-trailer is more suitable for less than one carload of goods, at least there is no need to disassemble the bin or carriage.

In addition, considering the protection of goods, the fence semi-trailer does not have an advantage, because the carriage of the fence semi-trailer is open, which is not as good as the closed van semi-trailer. The goods can't be blown by the wind and hit by the rain. Although the warehouse station semi-trailer also needs to be covered with tarpaulin, it can still play a certain role in protecting the goods in view of the existence of warehouse grid railings. Therefore, green transportation tends to be high hurdle or van.

Nowadays, the requirements and management of relevant departments for vehicles are more meticulous and standardized, and pay attention to "special vehicles for special goods". In the transportation of ultra long, ultra wide and ultra-high goods, there are also special large transport semi-trailers, and the advantages of barrier type models are also weakened.

Because of this, in the long-distance transportation, the dominant position of the fence semi-trailer is gradually giving way to the warehouse truck and van, but this does not mean that the fence semi-trailer will withdraw from the transportation market. For some bulky goods or light bubble goods, such as transportation of building materials and furniture, the fence semi-trailer still has an advantage. Therefore, whether the model is practical depends on the type of goods source, transportation environment and transportation demand.

It is worth noting that at present, disc axle and air suspension are mandatory for three axle barrier semi-trailer in China. One reason is that the three axle barrier is relatively high in the number of commercial vehicles, and the goods transported are generally of low added value. The other is that the technical safety configuration of such vehicles is not high, so disc braking and air suspension are mandatory for such vehicles, To some extent, it is also to improve the safety factor.

At present, the price of disc axle in the market is generally high. The price of disc axle of the same specification can be about 3000 yuan higher than the drum price. For example, some first-line brands can even be sold to more than 9000 yuan or 10000 yuan, which has caused great pressure on the vehicle cost of car owners. Choosing products with high price ratio has become a widespread demand in the market. Darong disc axle is a new product developed and produced by Darong group. It is made of high-strength alloy seamless steel pipe and integrated axle manufacturing process. It has lighter weight, more durable and qualified by ISO9001:2008 quality management system. It has many advantages in reducing axle stress, prolonging service life, protecting goods and reducing tire damage, With reliable quality and ultra-high cost performance, it has accumulated a wide and good reputation in the industry.