"Towing a trailer" is a term we often see. For example, in the question bank of the driver's license examination, we often see "vehicles shall not tow a trailer during the internship", which refers to a behavior of towing the rear compartment with a vehicle. In fact, in addition to the meaning of the verb, the towing trailer also refers to a vehicle type which is widely used in the logistics and transportation industry.

In general, the towing Trailer refers to a type of vehicle that has no driving capacity and is mainly used to provide cargo loading space and bear gravity, and can drive by relying on the traction power provided by the tractor in front. With the continuous development of the automotive industry, more and more traction models are gradually emerging.

In terms of types, towing trailers can be mainly divided into the following categories:

1. Semi trailer.

At present, semi-trailer is the most widely used carriage type in domestic road transportation. Its axle is installed at the rear of the carriage, so it can not stand stably independently. It is necessary to put the front section of the carriage on the tractor and keep upright by relying on the support provided by the tractor. In other words, the tractor needs to install a special traction saddle behind the body to bear part of the weight of the semi-trailer and provide traction power at the same time. After the semi-trailer compartment is separated from the tractor, special outriggers are required for support.

Semi trailers can be divided into flat type, gooseneck type, concave beam type, warehouse grid type, fence type, van type, container type, tank type, self unloading type, skeleton type and other types. They have strong high-speed driving stability, simple main Trailer matching, flexible application and strong bearing capacity. They are especially suitable for long-distance transportation and high-grade highway transportation without steering device.

2. Full trailer.

The full trailer is opposite to the semi-trailer. The biggest difference is that the full trailer can stand independently. The installation and distribution of its axles can evenly bear the weight of the carriage. Therefore, it can stand upright smoothly even if it is not connected with the tractor. The tractor in front only needs to provide traction power, so it can be connected with a hook.

A typical full trailer is generally composed of frame, pallet (top mounted), drawbar (frame), steering device, suspension, braking system, signal system, etc. Compared with semi-trailer, full trailer has stronger driving stability in mountainous areas or rough roads, which is mainly due to the fact that the drawbar or traction frame between it and the tractor can swing up, down, left and right. However, the disadvantages are relatively obvious. The stability is poor when driving at high speed, and it is prone to accidents such as braking tail flicking and traction frame fracture. Therefore, it is mainly used for transportation in docks, factories, ports and other fields.

3. Center axle trailer.

As the name suggests, the middle axle trailer refers to a trailer whose axle is located in the center of gravity of the carriage. When it is separated from the tractor, it cannot independently support its own weight. It is mainly composed of the carriage, traction device and axle. The connecting device with the tractor can swing left and right and cannot move up and down.

Compared with other trailers, the center axle trailer has the characteristics of low center of gravity, light weight and simple structure. However, because it is only suitable for high-grade highway, it is more suitable for fixed special line transportation. According to the gb1589 standard, the center axle trailer occupies a certain advantage in the overall dimension. With the continuous development, it may change the current situation of the semi-trailer.

4. Light towing Trailer.

Different from other towing trailers, the main function of light towing trailers does not lie in cargo transportation. For example, residential trailers, that is, what we often call RV, can be towed by passenger cars or light trucks, which is more widely and convenient.

Light towing trailer can be subdivided into light towing semi-trailer and light center axle towing Trailer. From the perspective of function, the bearing capacity of light traction semi-trailer is stronger and the driving is more stable; The light center axle tractor trailer can stand independently and stably, but when the center axle carriage has a large load, it is easy to offset in case of transverse wind when driving at high speed.

The above are the four common types of towing trailers in China. It is worth noting that no matter what kind of towing trailer, you must obtain the corresponding driver's license before driving. Among them, semi-trailer, full trailer and center axle trailer need A2 driver's license, while light towing Trailer needs C6 driver's license. Although light towing trailers can be towed by passenger cars, at present, only A2 driver's license can be compatible with C6 driver's license, and other types who want to drive towing trailers must apply for additional driving.

Although there are different types of towing trailers, they all play a role in their respective fields. Darong heavy industry group is a leader in the domestic trailer axle industry. With more than 20 years of experience in axle R & D and production, Darong heavy industry group has made good achievements in the fields of "one-piece" axle, lightweight axle and maintenance free axle. Darong's disc axle, drum axle, low flat plate axle, three line six axle axle axle axle, special axle, American optical axle, German optical axle and other products are available, with reliable quality and affordable price, Help car owners improve transportation efficiency, reduce logistics costs and ensure safe operation.