Lowbed semi trailer is usually used to transport heavy vehicles (such as tractors, buses, special cars, etc.), rail vehicles, mining machinery, forestry machinery, construction machinery (such as excavators, bulldozers, loaders, pavers, cranes, etc.) And other heavy-duty cargoes, the lower the center of gravity, the better the stability and safety, the stronger the ability to transport super-high cargo and pass overhead obstacles.
According to the number of axles and the size of the tires, the load of the lowbed semi-trailer is also different. The more axles, the greater the load. The load range is between 20-150 tons.
Lowbed semi trailer also has a wide range of cargoes and is suitable for the transportation of various steel materials such as a variety of mechanical equipment, large objects, road construction equipment, large tanks, and power station equipment.
1. Lowbed semi trailer has flat, concave beam and exposed wheel structure. The longitudinal beam adopts straight or gooseneck type. Its frame is stepped, and the longitudinal beam has an I-shaped cross section. It has the characteristics of high rigidity and high strength.
2. The main plane of the frame and cargo platform is low, which ensures the stability of transportation and is suitable for carrying various types of engineering machinery, large equipment and steel.
3. A three-axis balanced type, a two-axis balanced type or a rigid suspension is used, and a mass balance block is installed between the front and rear leaf springs, which can change the deflection of the front and rear leaf springs by the same amount and balance the front and rear axle forces;
4. The low bed semi-trailer series products are suitable for the transportation of various types of mechanical equipment, large objects, highway construction equipment, large tanks, power station equipment and various steel materials. They are widely used, efficient and fast. The whole vehicle adopts advanced computer-aided design software to optimize and design flexible and diverse,
Design the load-bearing surface of the frame according to user requirements to meet the transportation of various special goods.
The semi trailer frame is mainly composed of beams-welded I-beams, supporting beams, connecting beams, side beams, locks, traction pin connecting devices, panels, etc. The low flat semi-trailer trucks are also widely used and suitable for a variety of machinery Transportation of various steel materials for equipment, large objects, highway construction equipment, large tanks, and power station equipment.
The main structure of lowbed semi trailer
1. The side beams are generally channel steel or bending parts. At present, most trailers use channel steel, and there will be more side beams for light body hanging bending parts, because the strength requirements are not too large. The supporting beam is a through beam, and now most of them are W beams.
2. The traction pin is an important component that connects the semi-trailer to the tractor and bears the traction force, and is connected to the traction seat. It is generally made of steel with chromium alloy structure.
3. The general semi-trailer suspension is a non-independent steel stamping rigid suspension, which is composed of a series of leaf springs and a suspension support to support the load and reduce the impact of the vehicle's cargo dynamic load. Due to the different uses of special vehicles, there are different requirements for the design of the suspension. There are four types of suspension commonly used: series-connected leaf spring balanced suspension, single-point suspension, air suspension, and rigid suspension.
5. The electrical system of the semi-trailer is composed of seven-core sockets, cables, gas circuits, various lamps, etc. It is used for lighting, safety warning and gas supply for brakes.
6. The support device of the semi-trailer is mainly used to support the trailer when it is detached, and is composed of legs and connecting brackets.
7. The semi-trailer protection device consists of side protection and rear protection to protect pedestrians and other vehicles from getting under the semi-trailer.
8. Other attachments on the semi-trailer include toolbox, spare tire frame, gantry frame, piles, etc. There are also some small accessories such as tight ropes and rope hooks that are very functional and can be selected according to the type of goods.
Low flat type semi-hanging features
1. The series of drop deck semi trailer have flat-plate, concave beam and exposed tire structures, and the longitudinal beams are straight or gooseneck. The frame is stepped, and the longitudinal beam section is I-shaped, which has the characteristics of high rigidity and high strength.
2. The main plane of the frame and cargo platform is low, which ensures the stability of transportation and is suitable for carrying various types of engineering machinery, large equipment and steel.
3. Adopt three-axis balanced type, two-axis balanced type or rigid suspension, and a mass balance block is installed between the front and rear leaf springs, so that the deflection of the front and rear leaf springs can be changed by equal amounts, so that the front and rear axles are balanced.
4. The low-floor semi-trailer series products are suitable for a variety of mechanical equipment, large objects, road construction equipment, large tanks, power station equipment, and other transportation. They are versatile, efficient and fast. The whole vehicle adopts advanced computer-aided design software to optimize and design flexible and diverse, according to user requirements to design the frame bearing surface to meet the transportation of various special goods.
5. There are two types of low-flat transport vehicles: two-axle and three-axle. Both have front legs. Generally below 13 meters. The load of the trailer is fully borne by itself, and it is only connected to the locomotive with a hook. The locomotive only provides power to help it overcome the frictional resistance of the road. The full trailer can stand upright on its own tires. Generally around 6.5 meters. Semi trailers and lowbed semi trailers must have a water spray system before leaving the factory, because in long-distance transportation, prolonged application of the brakes will cause the wheels to heat. Failure to adopt the cooling brake will reduce the effect or even malfunction, and reduce the service life of the wheels, axles, and tires.
