Vehicle Crane Jib System Extension Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle crane jib systems face limitations in extending their length without reducing the permissible bearing load, due to the specified guidance of tensile means which restricts height gain and load-bearing capacity.
Innovation Solution
The introduction of a main jib extension between the jib head and the additional jib, with the guying support repositioned on the main jib extension, allows for increased length and height gain while maintaining or enhancing the bearing load by optimizing the force ratio within the jib system, and the ability to change the length of tensioner sections independently to adapt to varying loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the jib system is extended by adding length to the main jib or main jib extension, then the height gain and reach are improved, but the permissible bearing load is reduced
Solution Approach 1:
The jib system is divided into multiple segments: main jib, main jib extension, and additional jib. This segmentation allows each component to be optimized independently for strength-to-length ratio, enabling overall system extension while maintaining bearing capacity through distributed structural design
Solution Approach 2:
The guying support is positioned laterally offset from the longitudinal axis of the main jib and main jib extension. This spatial repositioning creates optimized force angles in three-dimensional space, allowing the tensile means to more effectively counteract gravitational loads on the extended jib system, thereby maintaining bearing load capacity despite increased length
2Strength
If the guying support is repositioned on the main jib extension, then the force ratio and bearing load are improved, but the structural complexity increases
Solution Approach 1:
The guying support structure is designed to serve multiple functions: it provides guidance for the tensile means, acts as a structural reinforcement point for the extended jib system, and enables optimized force distribution. This multi-functionality reduces the need for separate components, thereby limiting the increase in structural complexity while achieving improved bearing load capacity
3Length of moving object
If the length of the main jib extension is increased, then the height gain is improved, but the stability and bearing load capacity deteriorate
Solution Approach 1:
The main jib extension acts as an intermediary structural element between the main jib and the additional jib. It provides a stable intermediate platform that supports the guying support and guides the tensile means, thereby maintaining overall system stability even as the total jib length increases through the extension component
Data Source
AI summary
A vehicle crane having a superstructure with a jib system including a main jib mounted in a luffable manner on the superstructure, with a jib head and a luffable additional jib and at least one luffing support supported in the region of a luffing axis of the additional jib. At least one guying support of the jib system is arranged in such a manner that a tensioner starting on the one hand from the superstructure and/or from a counterweight and connected on the other hand to the additional jib is guided via the at least one guying support and the at least one luffing support. A main jib extension is incorporated between the jib head and the additional jib with the at least one guying support supported at the main jib extension to obtain a longer design of the jib system with the highest possible permissible bearing load.