In heavy-duty low bed trailer transportation, it is not enough to check the reliability of the transport vehicle for the safety check of the transport vehicle, because the reliability check is often carried out while the system is in a stable state. Once the system is affected by accidental factors, the stable state is lost At this time, it will change the force and movement state of the transportation vehicle, causing a safety accident. Therefore, in order to ensure the safety and reliability of the transportation vehicle during the work, various factors of the transportation low bed trailer must be analyzed and tested.

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What are the factors affecting the passability of lowbed trailers?

Semi trailer theory research shows that the passability of a low loader trailer refers to the ability of a car to pass through various road conditions at a sufficiently high average speed under a certain load. 

There are many influencing factors for vehicle passability. From the perspective of giving full play to the power of the car, driving speed, car wheels, differentials, driving methods, etc. have an impact on passability; from the perspective of the vehicle technical structure, the minimum ground clearance of the car, Longitudinal passing radius, lateral passing radius, minimum turning diameter, etc., reflect the passing capacity of the vehicle; from the perspective of highway technical indicators, the carrying capacity, slope, bend radius and clearance of the highway limit the passing of the vehicle.

Heavy-duty low loader trailer transportation due to their ultra-long, ultra-wide, and ultra-high characteristics, determine that they are different from ordinary vehicles during transportation, especially in terms of passability, the strength, clearance, and technology of roads, bridges, and tunnels along the way. The conditions have special requirements.

Engineering practice shows that during heavy transportation, air obstacles, road or bridge cargo restrictions, obstructions on roads and facilities above, etc. often impede the passage of transportation. According to the characteristics of heavy transportation work and transportation requirements, it can be summed up. The passability of the vehicle includes the following aspects.

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Road load capacity

The load tonnage of large parts transportation is generally large, and the roads and bridges that need to pass through the ground and have large loads should have a large area with sufficient load capacity. Therefore, the roads and bridges need to be analyzed and checked. If it does not meet the strength requirements, it will inevitably cause the vehicle-cargo system to be unstable and cause a safety accident.

Horizontal and longitudinal capacity

The cross slope and longitudinal slope of the highway have a great influence on the stress system of transportation vehicles and cargoes. From the previous vehicle stability analysis, it can be seen that if the cargo has a certain strapping method, if its maximum lateral and longitudinal tilt angle exceeds the allowable The angle will destroy the stability of the transportation vehicle, which means that the transportation vehicle cannot pass through such a steep road.

Curve passing ability

Usually highways are designed according to highway technical standards, but because the large-sized transportation vehicles are different from the ordinary design vehicles based on highways in terms of both the shape of the equipment trailer and its turning ability, it is necessary to check the curve data of the highway along the way to Determine whether the vehicle can pass safely.

Overall capacity

Due to the ultra-high and ultra-wide width of large objects, the clearance size of roads, bridges, tunnels and buildings on the road must be passed to ensure the safe passage of transportation vehicles.

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What are the factors that affect the stability of heavy duty lowbed trailer?

The stability of the transport vehicle includes the stability of the strapping method and the stability of the trailer operation.

1. The bundling stability is divided into bundling forward sliding stability, forward rolling stability, side sliding stability and rollover stability;

2. The running stability is divided into the horizontal stability of the trailer, the longitudinal stability of the trailer, the stability of the collapse of the low loader trailer and the resulting local axle load increase, and the stability problems caused by the failure of some branches or components of the hydraulic system.

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A large inertial force is formed during emergency braking of a lowbed trailer train, which may cause the cargo to slide forward along the plane of the car body and the cargo to tip forward; when the car body is tilted laterally, the cargo may slide sideways or Pour sideways. Therefore, when the quality and outer dimensions of the cargo carried by the car train are very large, the design of the strapping scheme is generally required in advance to ensure the reliability of the strapping between the cargo and the low loader trailer body. The higher the tipping resistance and the side slip resistance of the trailer, the better the stability, and the driving safety and other performance of the trailer are also improved. Therefore, in order to ensure the safety and reliability of the transportation process, it is necessary to consider the stability of the strapping method.

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The running stability of the trailer is divided into lateral stability and longitudinal stability. The internal factors that affect its stability are mainly the width of the trailer, the height of the center of gravity of the cargo and the weight of the cargo. Under high wind conditions, the windward area of the cargo also affects its stability. The external factors that affect stability are mainly the cross slope, longitudinal slope and lateral strong wind of the road. Therefore, it is necessary to comprehensively consider various factors and determine under what extreme conditions the lowbed trailer group will have horizontal or vertical stability.

Through this video below, you can learn about different types of lowbed semi-trailers, like 2axle, 3axle, 4axle lowbed semi trailer, hydraulic ladder lowbed semi trailer, etc.

As well as the process, testing, packaging and customer feedback, etc.