In the field of highway transportation in China, a type of vehicle with high transportation efficiency, low transportation cost and more types and quantities of goods is widely used, that is, semi-trailer, especially in medium and long-distance transportation, which plays an extremely important role.

According to the different types of goods transported, the semi-trailer can be divided into many types, such as rail type, warehouse grid type, van type, skeleton type, tank type, container type, self unloading type, flat type, car type and so on.

According to the different loading capacity of transported goods, the tonnage of semi-trailer is also different, from a few tons to more than ten tons, then to dozens of tons, hundreds of tons, etc. In general, the more axles of semi-trailer, the greater the load capacity.

How many axles does a semi-trailer have?

The number of axles of ordinary semi-trailer varies from one axle to six axles, but the three axle semi-trailer has the widest application range and is most commonly seen.

How do you think the semi-trailer is a few axles? In fact, it's also very simple. After looking at the picture above, you may also understand, that is, count from the side, how many groups of tires are installed on the semi-trailer, and a group of tires represents an axle.

According to the new gb1589 standard, the maximum load limit of cargo vehicles is 49T, that is, the maximum load of six axle semi-trailer is 49T. How many axles are those semi trailers that transport hundreds of tons mentioned above?

Strictly speaking, these semi trailers are different from ordinary semi trailers. They belong to special special vehicles. They are mainly used for the transportation of large non disassembled goods and cannot be used for the transportation of ordinary goods. For example, three line six axle semi-trailer, four line eight axle semi-trailer, five line ten axle semi-trailer, six line twelve axle semi-trailer, seven line fourteen axle semi-trailer, etc.

These semi trailers basically belong to the "Big Mac" in the industry, and their transportation weight limit is far more than that of ordinary semi trailers. For example, three lines and six axles can generally allow the transportation of large goods within 80t, four lines and eight axles can allow the transportation of large goods within 100t, five lines and ten axles can allow the transportation of large goods within 120t, and so on.

How to see how many axles are installed on such a semi-trailer? Please look at the picture below:

This is a three line six axle semi-trailer, that is, three rows of wheels are installed on the semi-trailer, and one row of wheels is parallel to two axles, with a total of six axles, which is the origin of the name "three lines and six axles".

Similarly, the lower semi-trailer with nine lines and 18 axles has nine rows of wheels from the side. Two axles are installed in parallel in one row, with a total of 18 axles. and so on.

As you can see, there are a lot of tires for such a special semi-trailer for heavy cargo transportation, such as three lines and six axles. There are three rows of wheels, one row of parallel two axles, and two tires are installed at both ends of one axle, a total of 24 tires. For example, those with more axles have more tires, so such semi-trailer is also called "full climbing" in the industry. The reason why so many tires are designed is that the semi-trailer has too much weight and is too damaging to the road. By increasing the contact area between the tire and the road, the pressure on the road can be reduced.

The axle of semi-trailer seems insignificant, but it actually bears all the load of body goods. In addition to ensuring the driving of the vehicle, it should also cooperate with the braking system of the tractor to maintain sensitive, stable and good braking performance. Therefore, whether the performance of a semi-trailer is stable depends largely on whether the axle is selected correctly.

Darong group is a time-honored enterprise specializing in the production of trailer axles and accessories. Up to now, it has accumulated more than 20 years of industry experience. Its Darong axle is specially tailored for heavy-duty semi-trailer. The "one-piece" heat treatment molding process has higher thickness and strength of axle beam, brake drum / brake disc and friction plate, which can maintain stable and good performance output under heavy load and meet the use needs of all kinds of semi-trailer.