Talking about 6 Commonly Used Semi-trailer Outriggers

what is semi trailer outriggers?

Semi-trailer outriggers, commonly known as trailer landing gears, are divided into left and right legs. As an indispensable part of a semi trailer, the commonly used outriggers generally have a stroke of about 45 cm, a closed height of about 90 cm, a rated load of 28 tons, and a static load of 40 tons. They all support the semi trailer after the trailer is separated from the front of the car, but the styles and types are different. Let's count them down.

Single Action trailer landing gears:

There is a gear box on each side of this type of outrigger, which is divided into two types: built-in and external. Through two cranks, they can be raised and lowered independently. There are two gears of high and low speeds. Low gear must be used for loads. This type is the most basic traditional outrigger, with strong adaptability, and can be used on both flat and uneven ground.

Linkage type trailer outriggers:

This type of landing gear has only one gear box. Through a crank, the left and right outriggers can be controlled to rise and fall at the same time. It is also divided into high and low speed gears. It is an upgraded version of the most basic traditional outrigger. Compared with single-action outriggers , The lifting efficiency has been doubled, but this kind of outrigger is only suitable for flat roads, and it can only be used when it is on uneven roads, and the support surface must be kept basically horizontal by the cushion block.

Aluminum alloy semi trailer legs:

This type of semi trailer legs is a product that should be lightweight. Its weight is about 30-40KG. Most of them are single-action outriggers. The function is basically the same as that of single action trailer legs. However, many old drivers report that the use effect is not very ideal. Insufficient force, easy to damage, suitable for vehicles that are not often detached, the main highlight is that the weight is nearly half lighter than the traditional outrigger.

Hydraulic trailer outriggers:

This type of outrigger is an upgraded replacement product of the traditional outrigger, and it is also an innovative application of electromechanical-hydraulic integration in the trailer industry. The whole outrigger can be said to be a set of integrated micro-hydraulic system. After the rated pressure, the solenoid valve is turned on and off to control the direction of the oil circuit, so as to realize the expansion and contraction of the oil cylinder alone or at the same time, that is, the lifting of the legs.

The landing gears trailer has a high degree of automation. Within the effective stroke of the oil cylinder, the outrigger can be automatically balanced. It is suitable for various road conditions. The tonnage support is suitable for high-efficiency high-frequency drop-and-hook transportation, but the weight is heavy, and the cost is about 5 times that of ordinary outriggers. In addition, there are few maintenance points at present, and the later maintenance costs are high, resulting in less current market applications. 

Pneumatic trailer landing gear:

This type of trailer legs is adjusted to the rated air pressure by the automatic pressure-regulating overflow valve through the pressure generated in the vehicle-mounted gas cylinder, and the direction of the gas path is controlled by turning on and off the pneumatic solenoid valve, and the cylinders hidden in the outrigger are controlled to expand and contract individually or simultaneously , that is, to realize the lifting of the semi trailer outriggers.

This trailer landing gear is similar to the hydraulic outrigger, which saves the crank handle and gear transmission mechanism, and has a high degree of automation. Within the effective stroke of the cylinder, the outrigger can also achieve automatic balance. It is suitable for various road conditions, and the lifting only needs to be through the electric switch. Operation, no need for traditional crank handles, high lifting efficiency, also suitable for efficient drop-and-hook transportation, lighter weight than hydraulic outriggers, and no need to worry about oil leakage. Currently, there are still fewer maintenance points, which are the same as hydraulic trailer legs. same question.

Pneumatic-hydraulic combined outriggers:

This kind of landing gear for trailer is based on the above principles of hydraulic and pneumatic outriggers. By using the high speed of the pneumatic outrigger when it is unloaded and the stability of the hydraulic outrigger when it is loaded and lifted, the two are perfectly combined to improve the lifting efficiency during operation. will be higher. However, before the popularization of mass production, if the technology is immature and the structure is more complex, the probability of failure will be more. Without the guidance of industry standards and policy specifications, the above hydraulic and pneumatic outriggers will also face the embarrassing situation of the above hydraulic and pneumatic outriggers.

However, from the trailer accessories such as outriggers, it is not difficult to see that traditional semi-trailers are undergoing a transformation from manufacturing to "intelligent manufacturing". This transformation is conducive to gradually improving the automation and intelligence level of semi-trailers and ensuring operation. Safety, improve use efficiency and product quality, and even enhance the comprehensive competitiveness of the entire logistics industry.If you have a need for semi trailer landing gear, welcome to check out LUEN trailer landing gear!