Classification Of Semi-trailer Suspension

Semi-trailer suspension is an important component that connects the running device and frame of the semi-trailer chassis. The support force, braking force, driving force, etc. of the vehicle are all transmitted through the suspension system, and it can also reduce the impact of bad roads on the vehicle, that is, shock absorption, ensuring the stability of the vehicle. Its importance cannot be overstated. Metaphor. Generally speaking, the types of semi-trailer suspension can be divided into four main types:

1. Rigid suspension. The body chassis of the rigid suspension acts directly on the axle between the wheels, without springs as buffers. When the road surface is uneven, it completely relies on the swing of the balance beam to maintain the relative balance of the front and rear axles. This kind of suspension is relatively rare at present because its shock absorption effect is very poor. It is mainly used on low-bed semi-trailers that carry cargo at low speeds.

2. Steel plate suspension. Also known as tandem leaf spring balance suspension, it is also a common leaf spring suspension, which is mainly composed of leaf springs, suspension supports, connecting rods, U-bolts, etc. The biggest advantages of this kind of trailer suspension are low cost, reliable operation and easy maintenance. Because of this, steel plate suspension is currently used in a very large proportion of domestic semi-trailers, about 70-80%.

3. Single point suspension. That is to say, the common front and rear brackets of leaf springs are reduced to a single bracket and connected to the vehicle body. The stress points can be equally divided into different axles, so the load-bearing capacity is larger, and it is generally used on heavy-duty trailers.

4. Air suspension. Also called airbag suspension, its most notable feature is the airbag air spring. Compared with other suspensions, air suspension has better buffering force, which can effectively protect cargo and improve driving comfort. It is currently mainly used. In the transportation of precision instruments, hazardous chemicals, etc.

These are the most common types of semi-trailer suspensions. You can choose the appropriate type of semi-trailer suspension products according to your actual application.