Telescopic Jib With Swing-Out Mast For Load Capacity
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Solution Overview
Problem
Existing telescoping jibs without a guying mast are harder to handle and require higher outlay for transportation and mounting, especially when the guying mast is not required for lifting a load.
Innovation Solution
A telescoping jib design where the mast is arranged on the inner box such that it can be folded in and remain on the inner box during transport and retraction, allowing for easy attachment or detachment without laborious processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a telescoping jib is designed without a guying mast to reduce complexity and transport outlay, then handling and transport costs are reduced, but load-bearing capacity is limited
Solution Approach 1:
The mast is divided into multiple telescoping sections (first section, second section, third section) that can be independently extended and retracted. This segmentation allows the mast to provide load-bearing capacity when needed while maintaining a compact form for transport, resolving the contradiction between structural complexity and load-bearing capacity.
Solution Approach 2:
The mast transitions from a static structure to a dynamic one that can be extended and retracted as needed. The telescoping mechanism with pivotable connections allows the mast to adapt its configuration between a compact transport state and an extended load-bearing state, enabling the system to achieve high load-bearing capacity only when required rather than maintaining it constantly.
2Strength
If a guying mast is added to increase load-bearing capacity, then strength is improved, but handling and mounting outlay increases
Solution Approach 1:
The mast sections are arranged in a nested configuration where inner sections are positioned within outer sections. This spatial arrangement in multiple dimensions allows all mast sections to be contained within a compact volume during transport, eliminating the need for separate mounting and handling operations while maintaining the capability to extend to full length when needed.
3Strength
If the mast is made extendable to increase load-bearing capacity, then strength is improved, but the mast protrudes beyond the basic box increasing transport dimensions
Solution Approach 1:
The mast sections are nested within each other like dolls, with the first section containing the second section, which contains the third section. This nesting arrangement allows the entire mast assembly to be contained within the basic box during transport without protruding beyond its dimensions, while still enabling full extension when load-bearing capacity is required.
Data Source
AI summary
A telescopic jib includes a main box, at least one inner box and at least one swing-out mast. The mast is arranged on the inner box such that the inner box is able to be pushed into the main box together with the mast in a swung-in or folded-in position to thereby provide a telescopic jib that more easily provides an increased load-bearing capacity. In a particular configuration such a telescopic jib is disposed on a vehicle crane having wheels, axles, a lower carriage and a superstructure, with the telescopic jib mounted to the superstructure.