Mobile Crane Guy Mast Segmented Extension Design
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Solution Overview
Problem
Existing vehicle crane systems face limitations in flexibly increasing load capacity and maintaining compact dimensions, especially in confined spaces, due to the inefficiencies of hydraulic telescopic systems and material usage in telescopic sections.
Innovation Solution
A vehicle crane design featuring a guy mast composed of a base support and extension supports with cable deflection rollers, allowing for flexible length adjustment by bolting the extension supports to the base support, enabling increased load capacity and reduced forces in guy ropes and main booms, while maintaining compact dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hydraulic telescopic systems are used to extend the guy mast, then the load capacity can be increased, but the device complexity and material usage increase
Solution Approach 1:
The guy mast is divided into a base support and multiple extension supports that can be independently positioned. Each support is a separate component that can be bolted to the main boom at different locations, allowing flexible configuration without complex hydraulic systems.
Solution Approach 2:
The system allows dynamic reconfiguration of the guy mast length by selectively bolting extension supports at different positions along the main boom, enabling adaptation to various load requirements without fixed telescopic mechanisms.
2Strength
If the guy mast is extended to increase load capacity, then the lever arm is increased, but the device complexity increases
Solution Approach 1:
The extension supports are segmented into discrete units that can be attached at different intervals along the main boom, allowing the lever arm to be extended in modular increments rather than requiring a complex continuous telescopic mechanism.
Solution Approach 2:
The extension supports serve multiple functions: they extend the lever arm to increase load capacity, and they can be positioned at various locations to adapt to different operational requirements, making the system universally applicable to various lifting scenarios.
3Strength
If telescopic sections with material are used, then the load capacity can be increased, but material usage and weight increase
Solution Approach 1:
Instead of using solid telescopic sections requiring significant material, the system uses segmented extension supports that are attached only where needed along the main boom, minimizing material usage while achieving the required load capacity.
Solution Approach 2:
The extension supports are positioned locally at specific intervals along the main boom rather than requiring continuous material throughout the extended length, providing structural strength only where mechanically necessary.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design allows for flexible and efficient load capacity adjustment, reducing material usage and maintaining stability, with the ability to achieve higher loads and compact dimensions as needed, by allowing the guy mast to be extended and bolted rigidly, thus optimizing the lever arm and force distribution.
Implementation Method 1
A cable deflection pulley is arranged on the base beam in the area of the base beam head and a further cable deflection pulley is arranged on the extension beam in the area of the extension beam head
Data Source
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AI summary
The invention relates to a mobile crane (1) with an undercarriage (2), a superstructure (4) arranged on the undercarriage (2), and a main boom (5) luffing on the superstructure (4), as well as at least one guyed mast (7) arranged on the main boom (5), wherein the guyed mast (7) comprises at least one base beam (8) which can be extended by at least one extension beam (9), a cable deflection pulley (8b) being arranged on the base beam (8) in the region of the base beam head (8a), and a further cable deflection pulley (9b) being arranged on the extension beam (9) in the region of the extension beam head (9a). In order to provide a mobile crane (1) that allows for flexible increases in lifting capacity, it is proposed that the extension beams (9) can be attached to the base beam (8) in an extended position for the purpose of lengthening.