Semi-trailer refers to a trailer whose axle is placed behind the center of gravity of the vehicle (when the vehicle is uniformly loaded) and equipped with a coupling device that can transmit horizontal and vertical forces to the tractor. Semi-trailers are generally three-axle semi-trailers, which are divided into eleven-meter barn semi-trailers, thirteen-meter barn semi-trailers, low-level semi-trailers and other types. It is a heavy transport vehicle connected with the front of a semi-trailer through a traction pin.

Features:

Compared with "integral" cars, semi-trailers can improve the comprehensive economic benefits of road transportation. The transportation efficiency can be improved by 30-50%, the cost can be reduced by 30-40%, and the fuel consumption can be reduced by 20-30%. More importantly, the use of semi-trailers can also promote the organizational form of logistics in China to a certain extent.

Use:

Semi-trailers are mainly used to transport bulky goods, such as excavators. The fence type is more suitable for pulling fresh goods, such as vegetables and fruits. Van is more suitable for pulling bulk goods and damp-proof expensive goods.

Difference:

Different from the full trailer, the semi-trailer is a trailer whose axle is placed behind the center of gravity of the vehicle (when the vehicle is uniformly loaded) and equipped with a coupling device that can transmit horizontal or vertical force to the tractor. Generally, a full trailer has two axles and a semi-trailer has one axle. Semi-trailer refers to a vehicle driven by a main vehicle with the same load without power.

Simply put, the whole trailer is connected with the truck in front with a hook. The semi-trailer is connected with the traction seat of the tractor through a traction pin. The common container transport vehicle is a typical semi-trailer train, and the rear part is a semi-trailer.

There are also differences in use. Full trailers are mainly used for short-distance transportation in factories, ports, docks, warehouses and other fields, while semi-trailers are mainly used for long-distance transportation of goods.