Forged Hoist Ring Assembly with Segmented Anchor and Rotating Loop
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Solution Overview
Problem
Existing hoist ring assemblies for lifting heavy loads lack robustness, ease of assembly, and rapid attachment/removal features, while being costly to fabricate.
Innovation Solution
A hoist ring assembly comprising an anchor subassembly with a bushing element, retainer element, and threaded fastener, and a loop subassembly with a lifting loop and pin elements, allowing for 360-degree rotation and 180-degree pivoting, and formed using forging for cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional hoist ring assemblies are designed to be robust for heavy load lifting, then safety and strength are improved, but assembly complexity and manufacturing cost increase
Solution Approach 1:
The hoist ring assembly is divided into distinct modular components: a bushing element with flange, a retainer element with slot, and a fastener element. Each component has a specific function and can be manufactured independently, simplifying both assembly and manufacturing while maintaining structural integrity for heavy load bearing.
2Strength
If traditional hoist ring assemblies are designed for heavy load capacity, then strength is improved, but ease of assembly deteriorates
Solution Approach 1:
The assembly is segmented into pre-manufactured components that fit together through simple geometric interfaces. The retainer element's slot receives the bushing's flange, and the fastener element threads into the bushing, creating a straightforward assembly sequence that maintains strength while improving ease of assembly.
Solution Approach 2:
The bushing element acts as an intermediary component between the retainer element and the fastener element. It provides a threaded bore for the fastener and a flange for the retainer, simplifying the overall assembly process while ensuring proper load distribution and structural integrity.
3Reliability
If traditional hoist ring assemblies are designed for robustness, then safety is improved, but manufacturing cost increases
Solution Approach 1:
Segmenting the assembly into separate components allows each part to be manufactured using optimal processes for its specific requirements. The bushing can be forged or machined, the retainer can be formed with a slot, and the fastener can be threaded, enabling cost-effective manufacturing while maintaining overall safety and reliability.
Solution Approach 2:
The design allows for parameter optimization in each component based on its specific function. Material selection, wall thickness, and geometric parameters can be independently optimized for each element to achieve the required safety factors at minimum manufacturing cost.
Data Source
AI summary
A hoist ring assembly includes an anchor subassembly with bushing, retainer and threaded fastener elements, and a loop subassembly with a lifting loop and pair of pin elements. The assembly is adapted such that the lifting loop is rotatable through a 360-degree angle about a major axis, and pivotable through at least 180-degree angle about a minor axis. The assembly can be rapidly assembled or disassembled, and incorporates one or more components which may be substantially fabricated by way of forging operation, particularly the retainer member.