The extendable trailer structure is a trailer mechanism that is designed and adapted to be towed and used when the tractor is traveling along the road. The extensions on the trailer can effectively bear loads that may have different lengths due to work needs. The mechanism of this type of trailer may include a front chassis and a rear chassis arranged in a telescopic connection, wherein each chassis can be supported by a separate wheel and axle assembly. They can be tilted side by side in the retracted state of the mechanism. The configuration can be spaced in an extended format of the mechanism.
Advantages of Extendable Semi Trailer
Telescopic semi-trailers can transport important tools and materials
Many items are transported using telescopic semi-trailers, but some items are more common than others. These items include heavy machinery and equipment used on construction sites, as well as construction materials. In fact, using telescopic semi-trailer transportation is one of the best ways to transport equipment and large materials in one go.
Easy loading with a telescopic semi-trailer
Unlike conventional trucks, the use of telescopic semi-trailers for transport makes the most of all available space. These telescopic semi-trailers can load items from the side, making the loading process faster, easier, and more efficient.
Cargo is not affected by weather conditions
Goods transported over long distances may experience weather problems. Luckily, the waterproof telescopic semi-trailer can keep all the transported items safe during long-distance transportation.
Telescopic semi-trailers are very useful on construction sites
Telescopic semi-trailers are invaluable for those currently working on construction sites. From transporting equipment for a variety of tasks to transporting waste and necessary materials, retractable semi-trailers help conduct business safely and increase productivity in the workplace.
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Our factory
Anda global trailer factory was established in 2007, covering an area of more than 200 acres, with a production plant of 12,000 square meters and a total of more than 800 employees.
Advanced equipment
With first-class and powerful production capacity, it adopts advanced production technology and high-quality raw materials and parts, and a reliable quality assurance system to meet customer requirements to the maximum extent.
Strong sales strength
Anda semi-trailers have successfully entered more than 50 countries and regions around the world, exporting 1,200 semi-trailers of various types to all parts of the world every year, and a total of 9,000 semi-trailers of different styles have been exported to all parts of the world.
One-stop service
Once a fault occurs, we will promptly assist in solving the problem. Anda can send technicians to the customer's location for technical training. The course mainly covers the operation and maintenance of the trailer, the understanding of various faults and the corresponding solutions. After training, the customer's workers can operate the trailer by themselves and have a full understanding of the various functions of the trailer.
Types of Extendable Semi Trailer
Longitudinally extendable trailers
Longitudinally extendable is commonly used to transport very long cargo, like tanks and windmill blades and bridge sections among other similar-like cargo.
To take these loads, the trailer is extended lengthwise. When it is not carrying any load, it needs to be adjusted back to a short length. Its application and use should, however, be based on the stipulated local laws and driving safety.
Wide extendable trailers
Wide extendable trailers are commonly used for taking loads that are big width-wise. The trailer is normally expanded horizontally to give room for such loads.
When it is not taking any load, it needs to be adjusted back to a short width based on the local laws and rules governing driving safety.
To meet the needs of the large-scale movement and transportation of wide cargo on roads, the frame width of the trailer gets adjusted to take up the job.
Longitudinal extendable trailer basic configuration
A conventional extendable trailer configuration has a fixed frame and an additional frame that can be connected to the fixed one.
The second frame makes a slide-able contact with the fixed frame to provide the desired longitudinal extension.
This means that the free frame can move in a relative way to the fixed frame for purposes of either lengthening or shortening the apparatus of the trailer.
The movable frame is usually situated at the rear section of the tractor-towed trailer. This freely moving trailer is made up of a set of wheels and axle firmly secured to it.
Securing of the load is firmly made to the fixed frame.
The Function of a Retractable Semi-Trailer
Retractable beams
These beams are the basis for the trailer's telescopic capacity. The axle allows the driver to stretch the compartment with enough support so that it does not sag in the middle. This is essential to ensure safe driving as well as to support and protect the hauled goods. Most retractable semi-trailers have multiple telescopic levels, with the driver using the smallest telescopic level that can accommodate a specific load.
Dedicated steering function
In order to safely and effectively maneuver extra-long trailers, especially on curvy roads, drivers must have advanced steering capabilities. Retractable semi-trailers can utilize a variety of steering methods, including turntable steering, hydraulic bogie, and self-steering axles. The type of steering used depends on the type of load that the trailer will haul and other factors.
The tail is flat
The retractable semi-trailer also has a tail section that allows the driver to unfold the tail section to support longer loads. This section can be folded up to carry longer loads, or the tail can be pulled out by the driver. In either case, the driver retracts the tail platform after the delivery of the goods.
Gooseneck connection
Retractable semi-trailers have gooseneck connections that are common on other types of trailers. The driver can raise or lower the gooseneck in order to attach it to tractors of different heights.
Components of Extendable Semi Trailer
Trailer frame
The retractable trailer frame structure includes the main beam, left and right side half-plates and transverse devices. The left and right side half-plates are connected to the main beam through the transverse device. The hydraulic gooseneck is connected to the frame head, and a hydraulic ladder is installed at the rear.
Function of gooseneck
The assembly and connection of the gooseneck point are usually connected to the tractor saddle through a turntable, a wedge and a towing pin. The gooseneck point of the telescopic trailer is a hydraulic component, which is usually adjusted by the telescopic extension and retraction of the hydraulic cylinder.
When the tractor rotates, the steering cylinder is pushed and transmitted to the steering axle of the trailer through the hydraulic circuit. The steering mechanism of the towing retractable trailer is usually installed on the gooseneck.
Hydraulic system
The basic components of the hydraulic system are hydraulic valve blocks, joints and pipelines. The entire system is provided with a hydraulic source by a power unit, and a safety valve is also provided in the circuit.
The trailer has a hydraulic system, including control circuits such as suspension lifting, gooseneck lifting, synchronous steering, lateral adjustment and ladder lifting.
Steering system
The steering system of telescopic trailers consists of wheel steering mechanism, gooseneck steering mechanism and supporting hydraulic synchronous control circuit.
The gooseneck steering mechanism uses the rotation of the tractor relative to the trailer to make the steering cylinder retract and extend synchronously relative to the wheel pair steering mechanism.
The axle is then driven through the steering rod and turntable.
Braking system
In order to further improve the rapid operation capability of the telescopic trailer, a braking system is also provided. It includes service brakes, dual-line automotive brake system and parking brake.
Emergency relay valve, air reservoir, dual brake air chamber and several specifications of parts connected to the pipeline.
The power supply line and control line are set separately. The most important component includes the connector connected to the tractor.
Power unit of the system
The power unit consists of a small diesel engine, which is the main prime mover. Other components include hydraulic oil tank, control lines and pipelines, hydraulic pump. The unit provides hydraulic source for the hydraulic system of the trailer.
Electrical system
The 24v single-wire system constitutes the electrical system of the telescopic trailer. In general, the electrical system includes components such as lights, connectors and wires. The electrical connection of the selected tractor is a national standard 24n type electrical connector.
The external signal and lighting components are usually equipped with brake lights, rear position lights and position lights, etc. For this application.
How to Maintain Extendable Semi Trailer
Check the brake system regularly
The brake system is a key component of the safety of the retractable semi-trailer. Regularly check the wear of the brake discs, brake pads and brake oil to ensure the sensitivity and reliability of the brake system.
Tire maintenance
Good tire condition is essential to the maneuverability and stability of the retractable semi-trailer. Regularly check the tire pressure, wear and balance to ensure that the tires are evenly worn and replace severely worn tires in time.
Lighting system inspection
Keep the lighting system of the retractable semi-trailer working properly, including headlights, taillights, brake lights, etc. The normal operation of the lighting system is essential when driving at night or in bad weather conditions.
Suspension system maintenance
The suspension system plays a vital role in the smooth driving of the retractable semi-trailer. Regularly check the springs, shock absorbers and connectors of the suspension system to ensure that they are working properly.
Axles and drivetrains
The axles and drivetrains are the core of the power transmission of the retractable semi-trailer. Regularly changing the differential and transmission oil, as well as checking the condition of the drive shaft and universal joints, can ensure the smooth operation of these systems.
Tractor head connection part
For the tractor head of the retractable semi-trailer, special attention should be paid to the connection part. Check the wear of the towing seat, towing arm and safety pin to ensure that the connection is tight and reliable.
Lubrication system
All parts that need lubrication, such as steering mechanism, pins and hinges, need to be oiled or lubricated regularly. Good lubrication can reduce wear and increase the service life of parts.
Electrical system
Regularly check the electrical system, including cables, plugs and connectors. Make sure all electrical equipment works properly to prevent malfunctions due to electrical problems.
Cleaning and rust prevention
Regularly clean the dirt and dust on the surface of the retractable semi-trailer, and perform rust prevention treatment when necessary. This helps maintain the appearance, slow down corrosion and extend the service life of the retractable semi-trailer.
Record and file preservation
Record the maintenance records of the retractable semi-trailer, including maintenance date, maintenance items, replacement parts, etc., and establish a systematic maintenance file to track the vehicle condition and perform maintenance and maintenance in time.
Company Introduction
It is also known as “Shandong Global Link Special Vehicle Manufacturing Co.,Ltd”which is a automobile and trailer production enterprise approved the National Development and Reform Commission. AD is mainly engaged in manufacturing，sales and technology development of modified vehicles, semi-trailers, special vehicle and their spare parts.
Our products are listed in 《The Announcement》of the National Development and Reform Commission and get "CCC" certification by China quality certification center.
ANDA global link trailer vehicle factory was founded in 2007, covers an area of more than 200 acres, 12000 square meters of production plants, a total of more than 800 employees. We have the first-class level and strong production capacity of assembly line production equipment, use the advanced production technology and high-quality raw materials and parts to maximize customer requirements with reliable quality assurance system. We sincerely provide our users with advanced, high quality series of special trailer.
ANDA international trade department was founded in 2014, and exported 1200 sets various of semi-trailers around the world every year. We have exported 9000 different styles of semi trailers all over the world in total.
FAQ
We're well-known as one of the leading extendable semi trailer manufacturers and suppliers in China, specialized in providing high quality products. We warmly welcome you to wholesale high-grade extendable semi trailer for sale here from our factory. For price consultation, contact us.
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