The car axle breaking incident has been making a lot of noise for some time. Many car owners are frightened by this extreme quality problem for fear that they will also encounter it. As a heavy-duty vehicle in the logistics and transportation industry, will the semi-trailer also have the serious problem of broken axle? The answer is yes, semi trailers will also break their axles.

So what is "broken shaft"? Under normal circumstances, the probability of axle directly breaking from the middle is very small. The so-called "broken axle" widely refers to the fracture of axle head or the loosening, fracture and deformation of parts connecting wheel, wheel edge assembly or suspension.

Axle breaking is a very dangerous situation, especially when the vehicle is flying at high speed. Once the axle is broken, it is easy to cause the wheels to fly out, the vehicle to lose control or the chassis to lose support. It is no exaggeration to destroy and kill people. The photos of the phenomenon of Trailer axle breaking on the Internet are even more shocking.

Why does a good car break its axle? The reasons can be divided into two aspects:

1. External factors:

(1) Side collision: after a general vehicle collision, there is a high probability of axle breakage, because this kind of collision force has exceeded the range that the axle or suspension can bear. For example, the impact or extrusion on the side or behind the side may lead to axle breakage without too much force.

(2) Turning: if the vehicle turns too fast, the outer tire may hit the curb or guardrail, causing axle breakage.

(3) When encountering potholes or low obstacles: for example, when encountering a large pit on the road, or encountering an upper limit wide pier, if the speed is fast, the impact on the chassis system is very large, which is easy to lead to shaft breakage.

(4) Overload: for transport vehicles, overload is a very common factor leading to shaft breakage. If the vehicle load limit is exceeded, the pressure borne by chassis parts is too large, and shaft breakage is also easy to occur.

2. Internal factors:

(1) Substandard material: the material of the axle is generally alloy steel with qualified strength. If the manufacturer is greedy for cheap raw materials and uses bad materials, it is easy to break the axle.

(2) Unqualified process: in the case of selecting the right raw materials, if the treatment process is unreasonable or does not meet the standard, the performance of steel can not be brought into full play, and it is easy to affect the use.

(3) Problems in structural design: the components with high requirements for bearing capacity, such as axle and suspension, generally need to undergo strict and professional design. If their structure is unreasonable, it is easy to break under the condition of stress concentration.

(4) Old scars: that is, we often say fatigue fracture, that is, there may be no problem with the quality of the axle, but there are some old scars after long-term use. If it is not repaired or updated in time, it may eventually lead to axle breakage.

(5) Manufacturing defects: there are many parts of the vehicle chassis. If there are defects such as shrinkage holes and sand holes on the parts, it is likely that the thick line will break when there is no external force.

It can be seen that there is more than one reason for the phenomenon of shaft breaking. The quality problem of the parts themselves is on the one hand, and the daily use habits of the car owners are on the other hand.

Some car owners asked: after the trailer axle is broken, can you repair it and continue to use it?

If you go to the repair shop and ask, the answer is yes. If the shaft is broken, it will be good to weld it. It can still be used after it is installed. However, to be honest, it is not recommended that car owners reuse the broken shaft after repair. Why? The damaged axle is repaired with ordinary technology, only for the restoration of the surface, but the damaged internal structure can not be repaired. It is certainly not as good as the intact axle in terms of load force. How can we ensure that it will not have problems in subsequent use? Instead of wasting time and money on a piece of junk and risking it, it's better to spend money on buying another one and installing it.

Now there are not only finished axles on the market, but also various axle semi-finished products or parts such as optical shafts, bearings and wheels. The price is affordable and the quality is much better than the repaired axle. For example, the average price of American and German optical shafts produced by Darong heavy industry group is about 900-1000 yuan. It is reliable and worry-saving to buy one directly for replacement.

In addition, when choosing the axle or suspension at the beginning, the owner should do a good job in identification. Although non professionals cannot identify the raw materials and materials with the naked eye, they can start from the aspects of production technology and production scale. If conditions permit, it is best to make a field visit to the factory.

Darong heavy industry group is a R & D manufacturer of commercial vehicle axles and parts. It was founded in 2001 and has a history of more than 20 years. Headquartered in Liangshan, Shandong Province, Darong heavy industry group has built a high-standard production workshop, which uniformly implements iatf16949 quality system standard from blanking to assembly, quality inspection and performance test. Darong axle uses a "one-piece" axle instead of the traditional "three-piece" welded axle body, and creates the axle body and axle head from a steel pipe, eliminating the welding connection process, avoiding thermal deformation and improving the firmness and durability of the axle head. For the connecting parts of the bearing, add medium frequency induction strengthening treatment to enhance the strength of the shaft head and ensure the heavy load and stability of the shaft head under high-speed operation. Fifteen production processes, covering 1300 ℃ hot rotary rolling, 865 ℃ medium frequency quenching, 480 ℃ heat preservation treatment, fully stimulate the comprehensive mechanical properties of raw materials, improve the strength, toughness, ductility and durability, and ensure the bending, torsion and fatigue resistance of finished products. For many years, with stable and reliable quality and affordable price, with many Trailer enterprises, logistics companies The transport fleet has established a good cooperative relationship with retail investors.