Each Component of the Trailer
1. Chassis
The frame is mainly composed of girder - welded I-beam, support beam, connection beam, side beam, lock, traction pin connection device, panel, etc.
The side beams are generally channel steel or bending pieces. At present, most trailers use channel steel. There will be more side beams for bending pieces with light body, because the requirements for strength are not too large.The supporting beam is the crossing beam, and now most of them are W beams.
2. Upper body
For side wall trailers, the bodywork part refers to railings, gantries, etc. The railing board is divided into flat plate and vertical corrugated board, vertical corrugated board is a typical board, the strength will be higher.
The gantry can also be called "front stop". Generally, if it is not specially required, the manufacturer will be movable and detachable. Therefore, for heavy goods that are often pulled and easy to slide, the gantry must be welded with two additional diagonal pulls.
3. Kingpin
The kingpin is an important component connecting the semi-trailer with the tractor and bearing the traction force, which is connected with the traction seat. It is generally forged from steel with chromium alloy structure.
For different cargo tonnage, there are 50 # traction pin and 90 # traction pin.Generally, the total weight of the trailer and the cargo is limited to 50# below .50T with 50# pin, 50T or more than 90#.90T if it is safe, 90# traction pin will be used.
4. Suspension system
The general semi-trailer suspension is a rigid suspension with independent steel plate stamping, which is composed of tandem steel plate springs and suspension supports to support the load and mitigate the impact of vehicle and cargo dynamic loads.
Due to different uses of special vehicles, there are different requirements for suspension design. There are four types of suspension commonly used: tandem steel plate balanced suspension, single point suspension, air suspension and rigid suspension.
5. Driving part
Axle:
The axle of semi-trailer is a support bridge, which is mainly XX Fuhua Bridge, BPW Bridge, York Bridge and Anqiao in China. Among them, XX Fuhua Bridge is the most popular. The axle is connected to the frame through leaf spring and pull rod and suspension device to support and transfer the force of load between the frame and wheels.
Steel rims and tires:
The steel rims and tires are equivalent to walking shoes. The steel rims and tires should be matched according to the standard.
6. Electrical system
The electrical system of the trailer is composed of seven core sockets, cables, air circuits, various lamps, etc., which are used for lighting, safety warning and air supply for brakes. Generally, the quality of the factory is basically determined by the regularity of the electrical circuit wiring. This is to see the big from the small.
7. Guard
The supporting device of the trailer is mainly used to support the trailer during uncoupling, which is composed of outriggers, connecting brackets, etc. There are many brands,
York, Paismark, Fuhua, Yost, etc. are all good outriggers. I can't see that there are many brands, because they are too easy to make and generally not bad!
Protective device
Trailer protection device consists of side protection and rear protection to protect pedestrians and other vehicles from getting under the semi-trailer. It also saves fuel when it is done well. When it is done well to reduce wind resistance, it is called side guard. This can be done abroad. If it is made into side skirt at home. The side guard is called "remodel" and will be punished.
9 Trailer accessories
Other accessories on semi-trailer include tool box, spare wheel rack, gantry, pile insertion, etc. There are also some small accessories, such as rope tightener, rope hook and other highly functional accessories, which should be installed according to the type o
The seemingly simple trailer is actually composed of so many parts. For a qualified semi-trailer, none of these parts can be omitted. This article takes the side wall semi-trailer with a relatively simple structure as an example. Special purpose vehicles in different fields also have different structures. I hope more Internet citizens working in various special purpose vehicles can share these contents with you.
