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Extendable Trailer

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1. What is an extendable trailers?

Extendable lowbed trailer also have more name, such as telescopic semi-trailers, extendable trailers for blade, telescopic blade trailer, extendable boom trailer.

Telescopic trailer, you can freely adjust the length of the semi-trailer according to the length of the cargo, so as to meet the transportation needs of different goods. Custom expandable telescopic flatbed and lowbed type trailer.

With the rapid development of the global transportation industry, semi-trailers have also begun to diversify into a variety of categories. Ordinary semi-trailers have limited capabilities, but special trailers also have single functions and low utilization rates.

Therefore, the bosses of transportation companies increasingly need a telescopic ordinary semi-trailer that can load very long cargoes, such as long cement pipes, steel pipes, wood, wind blades for power generation, etc.

 

extendable trailer

TITAN extendable trailer for sale testing

 

2. Common extendable methods:

In the middle, In the back of the gooseneck, in the tail, in the front.

We can freely change the design of drawing length according to the requirements of customers.

extendable trailer technical department drawing

13-39m extendable flatbed trailer technical department drawing

 

2 line 4 axle 42m extendable trailer technical department drawing

2 line 4 axle 42m telescopic trailer technical specification drawing

 

3 axle 52m extendable trailer technical parameter drawing

3 axle 52m expandable trailer technical parameter drawing

 

3. How to extend and close an extendable flatbed trailer?

The pulling and closing operation of a telescopic semi-trailer is very simple. You only need to use the tractor to move forward or reverse when the rear axle is braked. After reaching the working distance, lock it with the positioning pin.

 

4. How to design the brake air circuit and circuit of the heavy haul trailer?

Air pipe and electric wire for the circuit adopts the dragging pulley method, which expands and contracts as the inner beam expands and contracts. After reaching the working position, it can be fixed.

 

5. Does the rear wheel of the extendable lowbed trailers need a steering axles design?

Whether the rear wheels use steering wheels is determined based on the total length after drawing and the required road conditions.

extendable trailer

(1) Advantages of steering wheels and ordinary axles

The steering wheel structure can meet some special turning needs. The hydraulic control of the hydraulic station is used to realize the steering of the rear wheels.

(2) Disadvantages of steering wheels and ordinary axles

The cost of steering the axle is twice the cost of an ordinary axle, requiring more capital.

Steering axle load capacity is much smaller than ordinary axles. Large tonnage loads need to be changed to axis mode.

 

6.Key Components of the Extendable Trailer.

Here is a detailed look into how each of these parts is adapted to function:

1. The Braking System

To further enhance swift operations with the extendable trailer, a braking system is provided. This includes a service brake, a dual-line automobile brake system, and a parking brake. An emergency relay valve, air reservoir, double-brake chamber, and a number of specifications for the components connecting to the pipeline.

The supply and control lines are set separately. The most significant components include a connector attached to the tractor.

2.Trailer Frame

The extendable trailer for sale frame construction features the main beam, half plates to the left side and the right side, and a transverse device. The half plates to the left and right sides are linked to the main beam by means of the transverse device. The hydraulic gooseneck is attached to the frame head and a hydraulic ladder fitted at the rear section.

3. The Electrical System

A 24V single-wire system forms the electrical system of the extendable trailer. In totality, the electrical system includes lights, connectors, and wires among other components. The electrical connection attached to the tractor chosen is the national standard 24N type electrical connector.

The external signaling and lighting components are usually provided with brake lights, rear position lights, and position lights among others as deemed useful for use in this application.

extendable flatbed trailerextendable flatbed trailer

4. The System's Power Unit

The power unit is made up of a small diesel engine, which is the main prime mover. Other components include a hydraulic oil tank, control lines, and pipelines, hydraulic pump. The unit offers a hydraulic source for the trailer’s hydraulic system.

5. The Gooseneck Feature

The assembly and connection at the gooseneck point are usually made to the tractor saddle via the turntable, the wedge, and the traction pin. The trailer’s gooseneck feature is a hydraulic part that is usually adjusted through a telescopic expansion of the hydraulic cylinder.

As the tractor rotates, the steering cylinder gets pushed and transmitted to the steering bridge of the trailer via the hydraulic circuit. The steering mechanism towing the extendable low bed trailer is usually attached to the gooseneck.

6. The Hydraulic System

The basic components of the hydraulic system are hydraulic valve blocks, joints, and pipes. The entire system comes with a hydraulic source by means of a power unit. There is also a safety valve installed in the circuit.

The trailer has a hydraulic system that comprises control circuits like the suspension lifting, gooseneck lifting, synchronous steering, lateral adjustment, and in lifting the ladder.

Customers feedback of extendable low bed trailerCustomers feedback of extendable low bed trailer

7. The Steering System

The steering system of an extendable trailer comprises a wheel steering mechanism, a gooseneck steering mechanism, and a matching hydraulic synchronous control circuit.

The gooseneck steering mechanism makes use of the tractor’s rotation in relation to the trailer in order to contract and expand the steering cylinder in a synchronous manner in relation to the wheelset steering mechanism.

 

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