In domains such as civil engineering, heavy equipment, loaders, conveyor belts, and other manufacturing equipment are commonly used alongside dump trailer trucks to form loading, transferring, and offloading assembly plants for earthwork, as well as various bulk materials loading, unloading, and logistics. Furthermore, it is usually a large load with poor operating conditions and a significant vehicle loss.

Read these pointers that are essential when purchasing a semi-trailer:

· Carriage and frame

The semi trailer's frame is a frame structure, with a high-quality shaped I-steel or welded I-steel longitudinal beam. To lower the centre of gravity, the structure is designed in a stepped shape.

The crossbeam is made of high-quality steel plate or channel steel, and the crossbeam and longitudinal beam are connected by a beam piercing structure, which increases the frame's torsional strength.

The entire frame is assembled and welded on a special positioning platform, resulting in a frame with a reasonable structure, high strength, and excellent performance.

The carriage is made entirely of metal, is open on three sides, and has a rail board height of 600mm, which can be adjusted to meet the needs of the user. According to the length of the carriage, the left and right rail boards can be divided into front, middle, and back sections.

· Assistive technology

When the traction device is detached from the trailer, a mechanical supporting device is used to support the ground and bear the front load of the semi-trailer. The supporting device is divided into two types: single action and linkage, and is made up of the supporting disc, screw transmission mechanism, reducer, and control handle, with the most common models being Hanjiang, Baohua, Fuhua, and others.

· The suspension

· Suspension for a single axle semi trailer

A single axle spring suspension device is used in single axle semi-trailer suspension.

The front and rear supports are made of high-quality steel plate that is welded together with the longitudinal beam to create a solid and reliable structure. The main and auxiliary leaf springs make up the leaf spring assembly. The main leaf spring is thickened and heavy-duty, with enough bearing strength.

· Suspension for semi trailers with two axles

The semi-trailer suspension is equipped with a double-axle balanced spring suspension system.

The trailer's front and rear leaf spring suspensions are equipped with a mass balance device in the middle, which allows the trailer to make equal changes in front and rear leaf spring deflection during uneven road driving, ensuring smooth trailer operation.

· Semi-suspension with three axles (heavy duty)

The three-axle (heavy duty) semi-trailer suspension system uses three-axle balanced spring suspension.

The trailer is exercised on the uneven road, and the mass balance device in the middle of the front and rear leaf spring suspension is activated, causing the front and rear leaf spring deflection to change equally, allowing the car to be buffered.

· The braking mechanism

Customers can choose between domestic and imported brake devices, and the trailer anti-lock braking system can also be installed based on their needs. Pneumatic brakes are standard on semitrailers, and they work on all four wheels. The foot brakes are used when a car is running.

The driver's brake is used to park cars. A double pipe pneumatic braking system is used at the same time.

· Features and performance

When braking continuously on a long slope, the semi trailer equipped with a double pipe pneumatic brake can be charged to the trailer air storage cylinder.

When the semi-trailer and tractor are accidentally unhooked or the trailer's gas pipe leaks, causing the gas pressure to drop below the specified pressure, the trailer can brake on its own, and the main car's rear brake circuit does not lose its braking effect. The pipeline layout is as close as possible to the trailer air storage cylinder and hanging axle due to the high sensitivity of the emergency relay valve (10 Kpa), and a thicker air supply pipe is used.

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and enjoy all of the above benefits at a great price!