On semi-trailer landing gear

Semi-trailer leg commonly known as leg, truck people in some areas also call it "horse leg", there are about or main and auxiliary, as an indispensable part of the semi-trailer, commonly used leg generally travel 480cm, closed height of about 90cm, rated load 28 tons, static load 80 tons, its role is to support the semi-trailer after the semi-trailer and the front, but there are many varieties, Let's count them all.

Single Action Outriggers:

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 outriggers:

Only the main leg of this type of outrigger has a gear box. Through a crank and the connecting rod connecting the main and auxiliary outriggers, the main and auxiliary outriggers can be controlled to rise and fall at the same time. It is also divided into high and low speed gears, which is the most basic tradition. Compared with the single-action outrigger, the upgraded version of the outrigger has doubled the lifting efficiency, but this kind of outrigger is only suitable for flat roads, and can only be used on uneven roads with cushions to keep the supporting surface basically level.

Aluminum alloy legs:

This type of outrigger 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 outriggers. It is only suitable for no-load conditions. Compared with traditional iron outriggers , light weight, but insufficient rigidity.

Hydraulic 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 outrigger 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 outriggers:

This type of outrigger 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 outriggers.

This outrigger 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 outriggers. same question.

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 competition of the entire logistics industry.