Subject:
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Re: Crane Steering
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Newsgroups:
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lugnet.technic
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Date:
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Wed, 2 Mar 2005 18:41:19 GMT
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Viewed:
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2947 times
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There are several different steering possibilites to a trailer:
1) Normal forcesteered axle where the center of the wheel are placed infront of
the turning center.
2) As earlier trailers and socalled citytrailers:
where there is a waier from the axle connected to the king pin, which is
enganged in the fifth wheel.
3) Hydraulics:
same principle as in 2, but the waier are insted a cylinder at the kingpin, and
pushing oil to the another set of cylinders, and the angle will be determed by
the placement of the turning axle the cylinder are connected to.
Study a how steering are built up on a real truck, with more than one steered
axle, and you'll get the picture.
With trailers with hydraulics the suspension are in most cases, with
exeptensions, also hydraulics, and when you drive over uneven surfaces, the oil
will be pushed out of the cylinder, and into the system, where it will be pumped
in where its needed, this will make sure the trailer are even at all time.
Also you can steer the axles up or down, at your wish.
This also go for the steering, which you can steer manually, and it all are done
by hydraulics.
With a modular trailer, you have a cylinder in each modul, and this is connected
by hoses, and you will have to need a beam to steer and a cylinder to make the
movement, the angle are most likely to be determed by where the axles are
connected to the beam. (your there are one cylinder pr axle)
The principle are infact easy built up, nothing fancy with computers and motors,
just oil and cylinders...
Also there is 3 different methods of steering an axle of a trailer:
1) The hole axle turns (like a drawbar trailer)
2) each wheel turns like a car, truck, bus, or whatsoever
3) each wheelpair turns indipently.
regards
www.modellbygg.com
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Message is in Reply To:
 | | Re: Crane Steering
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| (...) Presumably they must have a different ackerman configuration for each axle? How do those modular trailers work, the ones with multiple lines of wheels? I'm guessing the trailer versions have a different ackerman configuration for every axle (...) (20 years ago, 2-Mar-05, to lugnet.technic)
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