Lightweight or strong to choose semi-trailer you prefer which side?

With the new version of GB1589 standard has been implemented in China, some owners in order to earn more money will not break the law, metropolitan choose lightweight truck vehicles. In terms of tractors, even if no matter how to lose weight, trailer suspension the lightest 6×4 semi-tractor will not break the 7.5 ton mark.

So some owners decided to replace the trailer to achieve legal overloading. But recently, a new domestic trailer manufacturer that produces "stronger semi-trailers" began to enter people's field of vision. In such a severe situation, will the "more robust semi-trailer" become the mainstream model in China? I take you to take a look.

Common trailer lightweight technology

Before that, let's take a look at the common semi-trailer weight loss methods. In order to make the semi-trailer effectively reduce its own weight as much as possible under the condition of ensuring safety, the lightweight technology used by most lightweight semi-trailers in China is mainly as follows:

First: Make special-shaped holes in the frame

In order to reduce the body weight of the vehicle, most of the current domestic semi-trailer manufacturers will choose to make more or less shaped holes similar to those shown in the figure above on the flanking surface of the frame (commonly known as the girder).

This design theoretically will reduce a part of its own weight, but after professional calculation, this design reduces the weight of only a dozen kilograms, for a total mass of 40 tons of semi-trailer can only be the tip of the iceberg. In addition, if the design is not appropriate, the side of the frame will crack, causing a safety hazard.

Second: the use of high-strength steel and alloy materials

In addition to making special-shaped holes in the frame, some semi-trailer manufacturers are willing to spend money on materials and use high-strength steel for automobiles to produce lightweight trailers.

What is more, lightweight materials such as aluminum alloy are used on the frame. Although the aluminum alloy can indeed reduce a part of the weight, but the aluminum alloy has a disadvantage, that is, after a greater strength of deformation can not be restored by external force, to put it plainly is "too soft." Therefore, most passenger cars in the world are steel and aluminum mixed body structure.

Third: Use aluminum alloy wheels

In recent years, whether it is a whole vehicle or a trailer, more and more standard load vehicles have begun to assemble aluminum alloy wheels. Rational use of aluminum alloy wheels can reduce the weight of the vehicle. According to professional calculations, according to the 12 wheels on a three-axis semi-trailer all assembled aluminum alloy wheels, at least 300 kilograms can be reduced.

Fourth: suspension system

In addition to the above lightweight measures, some thoughtful manufacturers will use a variable cross-section design of less spring steel plate suspension to further reduce the body weight of the vehicle, and some are even equipped with "plastic plate spring".

In fact, this plastic is not the plastic, it is mainly composed of polyurethane and glass fiber (is used to make truck fairing material), after a certain special process made of a similar plastic material leaf spring suspension. It has the characteristics of significantly reducing its own weight, excellent damping performance, high durability, no lubrication, no maintenance and so on. Some Volvo passenger cars are already using the suspension.

Tougher semitrailer

This is a domestic semi-trailer company produced lightweight plate semi-trailer. The trailer suspension use of composite spring, self weight within five tons.

"Sturdier semi-trailer" sturdier where?

After saying lightweight semi-trailer, let's talk about "stronger semi-trailer". As the saying goes, "blacksmithing also needs its own hard", to come out and kick the gym also need some real skills. So how hard is this "sturdier semi"?

1. High and thick frame with reinforced structure

While all semitrailers began to drill holes in the frame to reduce the body weight of the vehicle, the "sturdier semitrailer" chose to do the opposite, placing the strengthening structure in the right place in the frame. For example, the suspension system bracket, the goose neck of the frame is easy to crack.

In addition, the "Stronger semitrailer" also uses 10mm steel, which is only used by heavy-duty semitrailers, to build the frame. And only 10 mm, only more than 10.9 mm can not be less than 10 mm, less 0.001 mm can not. What is even more surprising is that the steel used must control the content of rare metals in the steel to ensure optimal structural strength.

Second, unique suspension system

Most lightweight semi-trailers use maintenance-free lightweight suspension, which can reduce a certain amount of friction interference and reduce the body weight of the vehicle.

The "stronger semi-trailer" uses a unique suspension design that will not cause excessive abnormal bias wear of the tire (commonly known as "eating the tire"), especially in the case of uneven load centers, this suspension system can reduce the chance of abnormal tire wear.

Third, the selection of axle

General lightweight semi-trailer will choose Huajin brand axle, light weight, high strength. Some manufacturers in order to save costs or in order to save weight, will be equipped with the car company's own production of the axle. There are also some companies willing to pay the cost of using BPW brand axle.

The "stronger semi-trailer" uses a strengthened axle, which has a stronger carrying capacity and is more durable than the axle produced by some trailer companies.

Four, the purchase of trailers has the door

To sum up, both trailers have advantages and disadvantages. Lightweight semi-trailer light weight, suitable for transporting some not particularly heavy goods or high timeliness goods, such as express delivery, medicine, daily necessities and so on. It's mostly on the highway. The "stronger semi-trailer" is more focused on the carrying capacity and durability of the semi-trailer, which is generally suitable for bulk cargo users and coal transportation users with uncertain supply. Most of the operating environments are roads of general quality such as national roads and trailer suspension provincial roads.

The owner does not need to be influenced by the manufacturer's publicity, and can choose the right model according to their own needs. However, the most important thing is to make a reasonable match with the tractor. As the saying goes, "The train runs fast, it all depends on the front." Whether the semi-trailer is good or not, the key is whether it and the tractor achieve a perfect match in performance.

Finally, it should be noted that due to the suspension system, the "stronger semi-trailer" is currently exposed as unable to be equipped with air bag suspension and disc brakes, and there may be certain problems with the selection of ABS and ESB.

No matter what kind of semi-trailer, lightweight or "stronger", the most important thing depends on whether the operating environment is suitable for the purchase of what kind of semi-trailer, neither overqualified, nor can always let a person carry the burden. It is more important to see whether the tractor is suitable for the use of this semi-trailer.