A semi trailer is a trailer with an axle placed behind the center of gravity of the vehicle and equipped with a coupling device that can transfer horizontal and vertical forces to the tractor. It has no driving force of its own and needs to be connected to the tractor with the help of a towing pin and driven by the driving force of the main vehicle.
The load of the semi trailer needs to be borne by the semi trailer and the main vehicle together, and it needs to be balanced with the outriggers after leaving the tractor.
Common classification of semi trailers:
1. Sideboard semi trailer
The semi trailer with a sideboard structure in the cargo area is the most common type on the market. It has strong cargo adaptability and is mainly suitable for medium and long-distance transportation of medium and heavy and bulk cargo.
2. Fence semi trailer
The semi trailer with a fence structure in the cargo area is mainly used for the transportation of agricultural and sideline products and other light goods.
3. Box semi trailer
The semi trailer with a box-type cargo area is mainly suitable for the transportation of household appliances, light textile goods, coal, sand and gravel and other construction materials as well as pallet goods.
4. Containerized semi trailer
Containerized semi trailer is a semi trailer that can transport containers and non-hazardous tank structures. The body is mostly a frame structure, mainly used in logistics systems supporting ships, ports, routes, roads, transfer stations, bridges, tunnels, and multimodal transport.
5. Tank trailer
The semi trailer with a closed tank structure is mainly used to transport liquids, bulk materials, and bulk cement.
6. Dump semi trailer
Dump semi trailer is a semi trailer with a self-unloading function in the cargo compartment, suitable for the transportation of bulk and scattered goods such as coal, ore, earthwork, and building materials.
7. Low-bed semi trailer
It refers to a semi trailer specially used for transporting large and non-disassembled heavy goods, such as heavy-duty vehicles (such as tractors, buses, special vehicles, etc.), rail vehicles, mining machinery, forestry machinery, engineering machinery (such as excavators, bulldozers, loaders, pavers, cranes, etc.) and other heavy-duty goods. Its cargo platform has a lower plane height, smaller wheel end diameter, low center of gravity, strong stability and passability.
8. Vehicle transport semi trailer
It refers to a semi trailer whose cargo platform is mostly designed with a fence structure and mainly transports passenger cars such as cars, vans, commercial vehicles, jeeps, etc. Most of them are upper and lower loading platforms.
9. Large-piece transport trailer
It refers to a semi trailer specially used for transporting super-wide, super-high, super-long, and super-heavy goods. These goods are generally large, heavy and indivisible, so they cannot be completed by ordinary transport vehicles.
There are many types of semi trailers, each with different characteristics and operating conditions. Car owners want to choose a suitable model. Before choosing a car, they must think clearly about four questions:
1. What type of cargo is loaded? Choose a matching model according to the type of cargo.
2. What is the transport tonnage? Choose a suitable model according to the usual weight of the cargo.
3. What kind of route do you usually run? Match the parts according to the usual driving conditions.
4. What is the budget? Choose a model according to the budget.