The axle is one of the very important components of the semi-trailer, which belongs to the core of the vehicle driving mechanism. It is not only directly related to the strength of the vehicle's load-bearing performance, but also plays a role in alleviating the impact of the road, ensuring the braking effect and maintaining the driving of the vehicle.

With the continuous development of the automobile market, there are more and more brands of semi-trailer bridges on the market. So, how much does a brand-new semi-trailer bridge cost?

This problem needs to be analyzed in detail. Like other commodities, semi-trailer bridges also have differences in brand, technology and technology. Take the 13T drum axle as an example. At present, most of its prices are concentrated between 3000-4500 yuan. The products taking the high-end route can rise to about 6000-8000 yuan. Of course, the prices of some unknown small factories can be reduced to about 2000-2500 yuan. In addition, the model, configuration, quantity and other factors selected by the owner will also have an impact on the final transaction price more or less.

It is worth noting that the price is not the only factor in choosing the axle. Take the production process as an example. Although the axle has very high requirements for production technology and process level, all these can not be identified from the appearance by the naked eye. Even if the manufacturer shoddy work and shoddy goods, it is still difficult for the owner to distinguish before use. Therefore, we have to take into account the brand, qualification and reputation. If conditions permit, we can also go to the factory for a field visit.

In addition, we should also comprehensively consider our own transportation conditions. Common transportation conditions can be divided into the following eight types:

1. Regional bulk cargo distribution (short distance, light load, standard load)

2. Port transportation (short distance, fast, drop hook)

3. Logistics express transportation (long-distance, efficient and punctual)

4. Green transportation (long-distance, efficient and punctual)

5. Cold chain transportation (long-distance, efficient and punctual)

6. Aggregate transportation (composite road section, full load)

7. Transportation of dangerous chemicals (composite section)

8. Special delivery in Yunnan Guizhou Sichuan region (composite section)

Next, let's briefly analyze what axle configurations are suitable for these working conditions:

1. Regional bulk cargo distribution:

The standard of short distance transportation is to arrive on the same day or the next day. Basically, it runs in the province or the city. Most of the goods are standard loaded and will not exceed the legal upper limit. The distribution roads are mainly national and provincial roads, supplemented by high-speed roads. Under this working condition, the choice of axle is relatively free as long as it is not a legally mandatory model to use disc brake.

2. Port transportation:

Port drop and hitch transportation has high requirements for timeliness. Often, one tractor can play the work efficiency of two or even three tractors. This kind of transportation condition requires higher vehicle attendance rate and longer maintenance interval of axle, so it is suitable to choose maintenance free axle. In addition, German axle has low fuel consumption, small tire damage, light weight and long maintenance cycle, which can also be considered.

3. Logistics express transportation / green transportation / cold chain transportation:

These three working conditions have certain similarities, such as long-distance, efficient and punctual. It is required to transport the goods to the destination within the specified distance and time, and the requirements for cargo damage are relatively strict. The owner can choose maintenance free axle or German axle with good stability and long maintenance cycle, or disc axle with more stable braking output (medium and heavy semi-trailer needs to be equipped with hydraulic auxiliary braking) and air suspension.

4. Sand and gravel transportation:

There are many complex sections under such transportation conditions, which have high requirements for the bearing capacity of vehicle and bridge. Relatively, the requirements for shock absorption and cargo damage rate are small. American style drum axle can be selected, and the "one-piece" axle beam has stronger anti heavy load ability, which can be matched with ordinary steel plate suspension.

5. Transportation of hazardous chemicals:

The transportation of dangerous chemicals does not have high requirements for timeliness, but it has high requirements for the safety of the vehicle itself and the operation skills of the driver. It can be said that it is afraid of melting in the mouth and falling in the palm of the hand. Under such working conditions, it is recommended to select the disc axle to minimize the accidents caused by uneven distribution of vehicle braking force, slow heat dissipation of brake and other factors. Mix with liquid to ease the suspension and improve the safety performance.

6. Special delivery from Yunnan Guizhou Sichuan region:

The road conditions in Yunnan Guizhou Sichuan region are also very typical. In the past, it was basically a golden partner of drum axle + water cooling. Now you can continue to choose this combination.

However, with the development of vehicle technology, the combination of disc axle and hydraulic retarder is becoming more and more common. The self weight of the vehicle is lighter and the safety is higher. It can not only make the vehicle stop smoothly in a shorter distance, but also prolong the service life of the friction plate, reduce tire loss, fully save energy and reduce consumption, and save the cost of comprehensive vehicles.