With the strengthening of the management of overload transportation by the traffic management department, vehicle lightweight has gradually become an industry trend. When purchasing trailers and their accessories, more and more car owners prefer to choose products with stable performance but lighter weight, which also promotes the manufacturers of trailers and accessories in terms of materials, technology Continuously optimize and improve the structure.

Generally, there are several common ways for trailers to achieve lightweight:

1. Reduce the plate thickness and select steel with high steel standard, high strength and good toughness.

2. Reduce the axle weight and take measures such as light axle and disc brake.

3. Choose lightweight girder, such as special-shaped punching, reducing vertical plate height and upper and lower flange width.

4. Choose a lighter suspension system, such as air suspension.

5. The suspension rear axle is adopted, which can be lifted when not in use.

6. Reduce the weight of accessories, such as bumper, protective net, spare wheel rack, toolbox, tarpaulin rack, etc.

7. Double tire for single tire, such as the large single tire adopted by some manufacturers, the weight loss is also very considerable.

       Reasonable lightweight design or improvement can effectively reduce the weight of the trailer, increase the owner's choice of cargo weight or cargo type, reduce fuel consumption, save energy and environmental protection, and improve transportation efficiency.

       However, we should also see that although lightweight is a general trend of the industry, it must be based on safety. In particular, trailer vehicles, as the main force of cargo transportation, have higher requirements for load-bearing performance and transportation safety. Therefore, in terms of lightweight, we must fully consider the reality and carry out lightweight improvement on the premise of ensuring safety performance. If we simply pursue "lightweight" at the expense of safety, the gain is not worth the loss.

      For example, axle weight reduction in the above lightweight approach. As we all know, the axle is the main load-bearing component of the trailer. It is connected with the body through the suspension to support the weight of the body. At the same time, the bearing force is distributed to each tire to ensure the driving of the trailer.

     As a load-bearing component, the realization of lightweight design can not be solved simply by changing materials, especially on the premise of ensuring that its load-bearing performance is not reduced or even enhanced, it is not easy to reduce its own weight.

       Some unknown small manufacturers have no strength support in terms of R & D capacity, production technology and manufacturing process. They simply use extensive methods to achieve lightweight, such as reducing the amount of steel or selecting light steel whose toughness does not meet the standard. Although the produced axles do not show any obvious difference in appearance, they even have obvious advantages in weight, But once put into use, with the passage of time, metal fatigue, bending, cracking and even torsion fracture are easy to occur under high-strength bearing capacity and changeable road conditions, which seriously threatens the operation safety.

       Therefore, when choosing lightweight products, car owners should not blindly believe the advertisements, but also shop around and make more inspections. Only products that can stand the test of the market and users can ensure travel safety. For example, the lightweight axle produced by Darong group selects 20Mn2 high-strength alloy seamless steel pipe to ensure strength, toughness and lightweight from raw materials. At the same time, it is matched with more than a dozen processes, such as one-piece heat treatment molding technology, integral axle housing casting, powder spraying + electrophoresis process, three hole boring and finishing after welding of brake base plate, CNC processing of shaft head, medium frequency induction treatment, etc, On the premise of improving the load-bearing of the axle and prolonging the service life of the axle, taking into account the lightweight, the weight is reduced by 15% - 20% compared with the traditional axle. The finished products are subject to performance test before leaving the factory to ensure that the quality meets the standard, stable and reliable.