Wheelbase refers to the linear distance between two adjacent wheels on the same side of the vehicle, which is generally the distance from the center of the front axle to the center of the rear axle. The axle base of a semi-trailer is the distance between the axes of the front and rear wheels of the semi-trailer.

Wheelbase is a very important parameter of semi-trailer, which determines the center of gravity position and space of semi-trailer, which is closely related to the performance of semi-trailer. The change of wheelbase will cause the change of axle load distribution between the front and rear axles of the vehicle, which is related to the braking, operability and ride comfort of the vehicle.

So, for the same semi-trailer, what is the difference between long wheelbase and short wheelbase?

1. Long wheelbase.

For the tractor, the longer the wheelbase, the larger the riding space and the higher the comfort. Although the wheelbase is not the only factor determining the interior space, it is the fundamental factor. For the semi-trailer behind the tractor, the longer the wheelbase, the more convenient it is to transport larger types of goods and load them better. In addition, the longer the wheelbase of the vehicle, the higher the stability at high speed and the more stable the driving.

However, the disadvantages are also obvious. The first is the problem of vehicle flexibility, especially when turning or turning around. Secondly, although the long wheelbase can bring more comfortable riding space, it is also easy to lead to poor vehicle handling and reduced safety factor. In addition, long wheelbase means that vehicles have higher requirements for parking space.

2. Short wheelbase.

Short wheelbase is opposite to long wheelbase. Although the structure is more compact, the parking space is more flexible, or the parking space is more convenient when the turning radius is smaller. At the same time, the axle base becomes shorter, which makes it difficult for the frame to deform under heavy pressure, and the bearing capacity is stronger. But relatively, the stability of vehicles is not as good as that of long wheelbase, especially when running at high speed, and the transportation of goods is easy to be limited.

In summary, the long wheelbase semi-trailer has larger riding space, wider types of goods transported and more stable running speed; The semi-trailer with short wheelbase is more flexible in curve driving, stronger in handling and stronger in bearing capacity.

It can be seen that long wheelbase and short wheelbase have their own advantages and disadvantages. Which one is better, we should also consider the actual use needs.

If there are many high-speed trains and the goods transported are mainly light goods, the semi-trailer with long wheelbase is more suitable; If you usually mainly pull coal, sand and gravel, or often drive more in mountainous areas, uphill and downhill and road conditions with more curves, the short wheelbase semi-trailer has more advantages, with greater uphill force and less turning force.

No matter whether the owner chooses long wheelbase or short wheelbase, he should do a good job in the selection and screening of axles, especially the rear axle of semi-trailer is related to the performance of bearing, braking and maintaining driving, and its quality must be strictly up to the standard. Darong group is one of the earliest axle enterprises in China. It is also the first axle enterprise to mass produce integrated axles in Liangshan special vehicle production base. It has rich product lines such as disc axle, drum axle, low flat axle, special axle, concave axle, three-line six axle axle axle and so on. For 20 years, it has focused on the R & D and production of cost-effective axle, With reliable quality and real price, it has established a good and stable cooperative relationship with many Trailer enterprises, logistics companies, transportation fleets and retail investors.