Modular Spread Bar with Lateral Truss Frames
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Solution Overview
Problem
Traditional spread bars used in crane lifting systems are overly massive to resist lateral bending, limiting the cargo capacity and reach of cranes, and are not easily adaptable to different cargo lengths without complex assembly.
Innovation Solution
A modular spread bar device comprising multiple beam sections with truss frames that can be reconfigured in length, featuring beam coupling arrangements and cable anchors to distribute load evenly across attachment cables, allowing for lighter construction while maintaining stiffness and accommodating various cargo lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional spread bars are made massive in construction to resist lateral bending, then lateral stability is improved, but the weight of the spread bar increases, limiting cargo capacity and crane reach
Solution Approach 1:
The spread bar is divided into multiple beam sections (first beam section, second beam section, third beam section) that can be selectively assembled. This segmentation allows the structure to achieve required lateral stability through truss support while reducing overall weight by only including necessary sections for each specific lifting operation.
Solution Approach 2:
The invention uses composite construction combining beam sections with truss frames. The truss provides lateral stiffness and strength while using less material than a solid massive beam would require, achieving the desired lateral stability with reduced weight.
2Stability of the object's composition
If traditional spread bars are made massive in construction to resist lateral bending, then lateral stability is improved, but the lateral distance the crane can reach is reduced
Solution Approach 1:
By segmenting the spread bar into selectable beam sections, the structure can be configured for optimal length based on the specific lifting task. This allows maximizing crane reach distance while maintaining adequate lateral stability through the truss-supported modular design.
Solution Approach 2:
The modular, selectively-assembled design allows the spread bar configuration to be dynamically adjusted for each lifting operation. Beam sections and trusses can be added or removed based on the required reach distance and load requirements, optimizing both crane reach and lateral stability for each specific task.
3Adaptability or versatility
If traditional spread bars are designed to accommodate different cargo lengths, then adaptability is improved, but the structure becomes more complex requiring many components
Solution Approach 1:
The spread bar is segmented into standardized beam sections (first, second, third beam sections) that can be selectively assembled in different combinations. This segmentation provides adaptability for various cargo lengths while keeping the number of individual components manageable through modular design.
Solution Approach 2:
The beam sections and coupling mechanisms are designed with universal interfaces that allow the same components to be assembled in different configurations. This multi-functionality enables a single set of modular components to accommodate various cargo lengths without requiring entirely different structures for each application.
Data Source
AI summary
A spread bar device is used to suspend a load from a crane using a lifting harness having a plurality of attachment cables. The spread bar device includes a modular central beam structure assembled from a main beam section and interchangeable end beam sections that are releasably coupled at opposing ends of the main beam section to vary the length of the spread bar device according to the load. One or more truss frames protrude laterally outward from the central beam structure to provide lateral stiffening to ensure sufficient strength while minimizing weight of the spread bar, despite the modular construction of the central beam assembly.