How many tons is a semi-trailer bridge? How should it be maintained?

The trailer axle is one of the important parts of the semi-trailer, in order to fully guarantee the attendance, safety and economic benefits of the semi-trailer in the long journey, it is very important to choose a high-quality axle.

Nowadays, lightweight has gradually become a trend in the semi-trailer industry, and more and more owners are more inclined to choose those products with stable performance and lighter weight when purchasing semi-trailers or accessories. Taking three-axle semi-trailer as an example, the axle weight accounts for almost 20% of the total weight, so the axle weight reduction is an important way to achieve the weight reduction of the trailer.

So, how much does a trailer axle weigh?

In fact, this problem also needs to be analyzed on a case-by-case basis, taking the most widely used conventional 13t drum axle on the market as an example, its weight is generally about 340kg, and the axles produced by different manufacturers will be more or less different. In addition, different models, tonnage and configuration will also affect the weight of the axle, like some of the main lightweight axle weight is also less than the ordinary axle.

The axle of the semi-trailer generally belongs to the support bridge, does not have the steering or driving function, and its structure looks relatively simple. However, the axle is related to the load-bearing, braking and driving of the semi-trailer, and the composition of parts is as high as hundreds, which not only requires high strength and toughness, but also has high requirements for accuracy. Therefore, doing a good job of daily maintenance and maintenance is very critical.

In general, the trailer every 50,000 kilometers, you need to do a maintenance on the hub bearings. Then how should be maintained?

1. Clean up the old grease. Remove the hub, clean the bearing, journal and hub cavity, scrape off the old grease, and then wipe it clean with cleaning agent or diesel, and then clean with clean water, dry the hub cavity with a clean rag.

2. Check bearing and seat ring. After the cleaning is completed, check the hub bearing and bearing ring, and replace the bearing in time if cracks, fatigue peeling, roller loose and other phenomena are found.

3, check the bearing clearance. Check the matching between the bearing inner diameter and the journal. The matching clearance should be no more than 0.1mm. The measuring position should be the two positions above and below the vertical ground of the shaft diameter, which is the maximum wear position.

4. Apply grease. Fill the gap between the bearing inner seat ring and the cage roller with new grease, and apply a thin layer of grease to the bearing inner and outer surfaces. A thin layer of grease in the hub cavity and the shaft head cover can play a rust-proof role, but it can not be too much, otherwise it will easily affect heat dissipation or braking. Finally install the wheel hub.

Some owners may buy maintenance-free trailer axles, which, according to the manufacturer's promotion, can reach 30W or 50W kilometers. It is worth noting that maintenance-free axles ≠ no inspection axles, although its maintenance period has been extended, daily inspection and maintenance is still essential, and it is necessary to open the axles at regular intervals to see the operating status of key components to ensure that bearings, wheels, etc., maintain good performance output.

1. Regularly check the fasteners of the wheel hub to see if there is any loosening or oil leakage.

2, regularly observe whether the gear oil is above the normal level, and whether it is contaminated, if the lubricating oil is not dark, such as white or milky white, it indicates that the lubricating oil is polluted.

3, every 12 months or 100,000 kilometers, the wheel should be set up to check the rotation has no difference, bearing shake.

4, every 12 months or 100,000 kilometers, open the oil injection hole, with a magnet probe into the lubricating oil to check whether there are iron filings impurities.

5. Add or replace lubricating oil regularly.

It is recommended that the owners should determine the maintenance cycle of the axle according to the comprehensive use conditions of their vehicles, especially the heavy-duty semi-trailer, and the maintenance cycle should be shortened.

In addition, it is to choose their own axle, drum type, disk type, lightweight or anti-heavy load, no matter how the manufacturer advertised, only fully meet their own use of the axle needs, in order to double the result in operating income. In addition, is to choose the quality of the brand, reliable does not mean that you must pay for the brand premium, the market is also a lot of cost-effective trailer axle brands, owners can start from the strength, experience, technology and so on to do a good job, shop around, choose cheaper products.