Many may have noticed that the trucks that go in flight, for some reason, raise the rear wheels. Certainly, the majority of people, not privy to the operation of such large machines, scratching their heads on this matter, but never fully understand why and how this really does. Well, it's time to come to understand this question, which is really not that complicated.
Anyone who saw the truck on the highway, could draw attention to the fact that in some cases they go with their wheels on certain axes. It is noteworthy that drive tractor-trailers is not always so. What is behind this strange phenomenon? In fact, everything is very simple. Lifting wheels dictated (as might be expected) is not some whim of the driver, and the objective requirements of the situation. So, what's the deal?
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But the fact that not all wagons are doing it, but only some of them, and only with some models of semitrailer. Rise wheels when the tractor should be on the road with an empty or minimum load. This is done in cases where there is no need to reduce the load on the axle by means of connection to the case of another pair of wheels. This implies another question: Why?
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Reasons extremely pragmatic - saving. Disconnecting from the case of one axle and lifting the wheels over the road allows you to not wear on their tires. Rubber is still worth a lot of money and quickly wear out, especially when it comes to such large machines. However, all of the above, only the first reason why the drivers raise the rear axle semi-trailer.
Note: By the way, lifting one of the axes helps save not only on tires. Disconnecting a pair of wheels on the drive also allows you to take care of not less valuable bearings.
The second reason - it's easy and driving safety. The fact is that when trucks are activated all axes, operate it becomes much more difficult, especially when it comes to maneuvering in bends. Work with two axes is everyone's easier than working with three or more.
It is interesting: By the way, lift axle, not only articulated vehicles. The same make and some large trucks and dump trucks whose structure provides for more than two axles.
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I would like to learn more interesting things?
Then read the material, which will help to learn which means that the writing on TIR trucks and why such machines are not checked at customs Most countries in the world.
A source: https://novate.ru/blogs/060619/50612/