Use of semi-trailer
Different from a full trailer, the semi-trailer is behind the axle of the vehicle (when the vehicle is evenly loaded) and is equipped with a trailer that can transmit horizontal or vertical forces to the tractor's coupling device! Generally, two axles are trailers and one axle is semi-trailer. Semi-trailer means that there is no power in itself, and the vehicle with the main vehicle is carried by the main vehicle.
Simply put, the trailer is connected to the front truck by a hook. The semi-trailer is connected to the traction seat of the tractor through the traction pin. The common container transporter is a typical semi-trailer train, and the rear loading part is a semi-trailer.
There are also differences in use. The trailers are mainly used for short-distance transportation in factories, ports, terminals, warehouses, etc., while semi-trailers are mainly used for long-distance transportation of goods.
The girders are an important part of the semi-trailer, and the importance is self-evident. No one wants his semi-trailer to break the girders. What are the reasons for the semi-trailer breaking the girders?
First, the manufacturer reasons
1. Inferior steel for semi-trailer girders
The reason that is easy to understand is that the quality of the girders used in the trailer factory is not good, and the load capacity of the design cannot be carried, causing the girders to break.
2. Reduce the beam specifications
Secondly, the trailer factory cut corners to save costs. Mainly to reduce the specifications of the girders, originally 14 thick vertical plates, reduced to 10 thick, and the user does not know, but also according to 14 thick load capacity to pull the goods, the girders overload work for a long time, the break is also reasonable in.
3. Connect the web of the girders
In addition to reducing the specifications of the girders, some conscience tractor manufacturers save costs. The webs of the girders are connected by two shorter steels. The bearing capacity is definitely worse than the whole one. It can be said that it is a factory. Broken girders, users should pay attention to inspection when buying a car.
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