Selection Of The Suitable Trolley - Jung JLA-e 5/12 G Betriebsanleitung

4.3 Selection of the suitable trolley

WARNING
When using the trolley with a transport load, there
is a danger of crushing. Always wear safety clothing.
Otherwise, accidents and injuries could occur.
WARNING
The total weight of the load to be lifted and transported
and the location of the centre of gravity must be known
before beginning with the lifting and transporting ope-
ration. Otherwise injuries may occur. Always determine
the centre of gravity beforehand.
The centre of gravity and the overall weight of the
transport load must be determined for the selection
of the appropriate transport trolley. Ideally, the centre
of gravity is symmetrical and in the middle of the
transport load. In this case, the selection can be done
using the following formula:
Minimum load capacity of the trolley = (load
to be moved in kg) x (safety factor 1.25)
1
Example - Ideal case
A transport load of 30 000 kg with a central centre of
gravity results in 7500 kg (2) at each of the support
points of the trolley (rear) and 15 000 kg (1) at the
steering gear. The used transport trolley JFB 15 G with
7500 kg each and the steering gear JLA (safety factor
1.5) are fully utilized .
© JUNG Hebe- und Transporttechnik GmbH
Electrically driven trolleys JLA-e 5/12 G, JLA-e 15/30 G and JLA-e 25/50 H
Example of a complicated case
The weight distribution on the support points (complica-
ted case) changes as a result of a non-centred centre of
gravity. A larger trolley (3) is required.
The centre of gravity of the same transport load is
shifted by about 500 mm towards the rear left trolley
cassette. As a result, the effective load increases to 15
000 kg. The permissible load capacity on the trolley
cassette in the ideal case is exceeded by more than 2
times.
Solution:
The JFB 30 G (4) with a permissible load capacity
of 15 000 kg for each trolley cassette is used as a
suitable trolley.
2
The center of gravity of the load should be positioned
centered between the electrically driven trolley and the
tandem trolleys. Otherwise, the motors could be over-
loaded. This can result in the motor fuses becoming
defective.
3
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NOTE
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