Warum haben Anhänger das Vorder- oder Mittelrad in der Luft?

Viele LKW Anhänger haben 6 Räder. 3 auf jeder Seite. Aber manchmal ist das Vorderrad oder Mittelrad in der Luft. Warum eigentlich? Wann benutzt man das Rad?

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heurekaforyou
8 months ago

You probably mean the so-called lift axle

AsLift axistheLVorsemi-trailersaaxis, which does not always run along the roadway, but with low load of theVehiclesis raised.

In the raised state, the wheels do not rotate, which brings several advantages:

For more information about the lift axle, see here:

https://de.wikipedia.org/wiki/Liftachse

HobbyTfz
8 months ago

Hello

If a trailer is not fully loaded, one axle is raised. There is then no wear of the bearings or tires on this axis.

When a certain weight is reached, the axis is lowered

Greetings HobbyTfz

Hafnafir
8 months ago

The trailers have a weight detection (rudimentary mechanics), if now less weight in the trailer, the wheels automatically drive upwards, which reduces wear and rolling resistance, thereby saving costs efficiently.

gordiorbi
8 months ago
Reply to  Koio78

Somewhere the trailer must have contact with the ground. Flying trailers are not yet available

Hafnafir
8 months ago
Reply to  Koio78

Theoretically it could be raised when the other wheels are driven down, but a trailer can not fly now and the control requires a reference axis, that is the rear because best for the driving behavior.

Hafnafir
8 months ago

that does not happen, but can be switched manually

LeroyJenkins87
8 months ago

This depends on the loading/weight. If easily loaded or even empty, then not all wheels are lowered. They keep longer because they have no obscurity.

Highlands
8 months ago
Reply to  Koio78

For most semi-trailers, it is always the first axle that is liftable. There are also which can raise the axis 1 +3 . It’s rather rare.

The load train runs smoother and more stable when the rear axle is on the road. Therefore, the most rigid and the front is liftable. But it doesn’t matter what axis you build as a lift axle.

LeroyJenkins87
8 months ago
Reply to  Koio78

Right. I didn’t say either. Only on the rear axle is the whole even more stable than on the front axle