"Review of the status of the issue of ensuring the load stability of the self-propelled jib crane."
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Keywords

self-propelled jib crane
cargo stability
counterweight design
remote supports
overturning the crane

Abstract

The article is aimed at finding the most effective method to increase the load stability of a
self-propelled jib crane. Attention is paid to the review of literature sources and patents. The method of increasing the resistance to overturning of crawler cranes, where movable
counterweights are used, is considered. It is shown that the stable region of the position of the
movable counterweights varies significantly depending on the configuration of the crane and the
mass of its payload. Otherwise, two indexes have been introduced to increase security. It is
determined that finding the support force is an effective means of preventing the mobile crane from
tipping over or the support from failing. A mechanical model of a truck crane is presented. The
method of increasing the resistance to overturning of the mobile crane considering the fluctuations
of the payload is considered. The utility of these cranes is greatly improved if they can use their
mobile base during lifting and transfer of operation phases. The schematic diagram of a mobile jib
crane used for static analysis is presented. The dependences of the maximum possible payload on
the angle of rotation are also shown. The variant of the self-propelled crane and a way of its
operation where there is a possibility to reduce full weight of a counterweight in comparison with
other cranes of the same loading capacity are considered. The scheme of the self-propelled crane is
offered. It is determined that the insufficient number of studies is aimed at the development and
improvement of load stability of jib cranes. The prospect of further improvement of the
counterweight design by adjusting the change in the position of the counterweight depending on the
payload and taking into account external factors is outlined. 

pdf (Українська)