How many kinds of common semi-trailer axles are there?

Semi-trailer axle refers to the axle installed on the semi-trailer bucket, which generally belongs to the support axle, neither with steering function nor driving function, and is specially used to bear the weight of the body. For the semi-trailer, the axle is one of the key conditions to determine its load-bearing performance, and also bears the function of guaranteeing braking, buffering bumps, maintaining driving, etc.

From the appearance, the middle of the semi-trailer axle is a monolithic axle beam, above which is connected to the body through the suspension system, and both sides are wheel end systems for mounting wheels. However, as the precision mechanical parts on the semi-trailer, the parts composition of the axle is still very complex, and each unit is interlocked and complementary to each other to jointly guarantee the comprehensive performance of the axle.

Want to protect the attendance, safety and economic efficiency of the semi-trailer, the choice of a high-quality axle is essential, especially in the mountain roads, rugged terrain, curves and other severe driving conditions, but also the performance of the axle put forward strict requirements.

In general, putting aside the differences in tonnage and model, the common axles on semi-trailers are mainly divided into the following categories.

1、Drum type axle.

Drum axle is the most widely used type of axle on the semi-trailer, is also the highest proportion of the current market.

Compared with other axles, the most obvious advantage of drum axle is relatively low price, accessories are basically common in the industry, and simple design, subsequent maintenance and replacement are more convenient.

From the braking performance, drum axle with sealed brake drum, brake friction area is large, can provide more adequate braking power for semi-trailer, especially heavy semi-trailer.

Therefore, drum axle can be widely used in all kinds of general cargo transportation, like sand and gravel materials, steel coils, wood, coal and other heavy weight cargo transportation can also be applied.

2、Disc type axle.

In recent years, the disc axle in the semi-trailer application more and more, on the one hand, thanks to the relevant policies to promote the role, on the other hand, is also closely related to its own advantages.

Disc axle with bare brake disc instead of sealed brake drum, heat dissipation, thermal decay resistance, water decay resistance, etc. has been greatly enhanced.

In addition, the disc axle is optimized for the brake transmission components, which can drive the brake pads immediately after stepping on the brake, with fast braking response and strong linear stability, and smoother braking.

Especially when used with ABS, EBS, hydraulic retarder, air suspension and other devices, the advantages of disc brakes are given greater play.

In the application field, in addition to the national mandatory three-axle column plate warehouse grill semi-trailer, those transport conditions with high requirements for cargo damage, such as transportation of dangerous goods, precision instruments, transportation of valuable goods, flowers, fruits and vegetables, etc. are more suitable for disc axles.

It is worth noting that in those poor road conditions of mountain transportation, if the disc brake with liquid slow and other auxiliary braking devices, often can get better braking effect than drum axles.

3、Low flatbed axle.

Low flatbed axle belongs to the special axle for low flatbed semi-trailer, such as 13.5 large plate truck. In accordance with regulatory requirements, the large plate car can only be used for the transport of large goods that can not be disassembled, ordinary goods are not allowed to transport, one is not safe, the other is not conducive to the good development of the freight market.

Low plate axle compared with other axles, shorter height, higher wall thickness, both to facilitate the loading and unloading of goods, easy to pass the height limit section, improve the smoothness of transport, but also to carry higher weight, transport machinery and equipment, large tanks, construction equipment, power station equipment, etc. are not in the conversation. In addition, like some sedan semi-trailer is also applicable to low flat axle.

4、Three lines and six axles axle.

Three-line six-axle axle is mainly used for large transport or extra-large transport, this kind of cargo is large in volume and weight, generally not demountable, and needs large or special vehicles for transport. The three-line six-axle axle is customized for large transport vehicles, with a load capacity of up to 80t and a large number of tires, reducing the average pressure on the contact surface and reducing the damage to the tires and the road.

Of course, in addition to the above types, semi-trailer axles and single-tire axles, double-tire axles, built-in axles, external axles, special axles, concave axles and many other kinds, different design structures, characteristics are not used, the applicable field or working conditions are more or less different, owners in the selection of the time to fully consider the use of demand.