Elastic Nut Retainer Structure for Easy Bolt-Side Detachment
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Solution Overview
Problem
Existing fall prevention tools for nuts attached to bolts require strong force to fix them in place, making it difficult to detach them without damage during maintenance or dismantling.
Innovation Solution
A fall prevention tool with a bolt holding part and a nut holding part formed by a single metal wire, where the nut holding part is designed to prevent nut rotation using restoring force, allowing for easy detachment without damaging the tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fall prevention tool is fixed to the bolt with strong force to prevent nut loosening, then the nut can be securely held, but the tool becomes difficult to detach and may bite into the nut during maintenance
Solution Approach 1:
The fall prevention tool is divided into two functional segments: a bolt holding part for securing to the bolt, and a nut holding part for preventing nut rotation. This segmentation allows each part to perform its specific function with appropriate force levels, enabling the nut holding part to prevent loosening without requiring excessive fastening force that would make detachment difficult.
Solution Approach 2:
Different parts of the tool have different structural properties optimized for their specific functions. The bolt holding part is designed to engage securely with the bolt, while the nut holding part has a specific geometry (such as a hook shape or clamping structure) that prevents nut rotation through localized contact. This local optimization allows effective nut retention without requiring the entire tool to be fixed with strong force.
2Reliability
If the fall prevention tool is designed to prevent nut rotation using restoring force, then the tool can hold the nut securely, but the structure becomes more complex
Solution Approach 1:
The nut holding part utilizes the elastic restoring force of the tool material itself to prevent nut rotation, without requiring additional springs, dampers, or complex mechanical mechanisms. The tool's own structural elasticity provides the necessary retaining force, allowing the system to be self-sufficient and avoiding added complexity from auxiliary components.
Solution Approach 2:
The tool employs elastic deformation and restoring force characteristics of the material to achieve nut retention. By selecting appropriate material properties and structural geometry, the tool naturally generates the required retaining force through elastic recovery, converting material parameter selection into functional performance without adding mechanical complexity.
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
The tool effectively prevents nut rotation and falling without applying excessive force to the bolt, enabling easy and non-destructive detachment and reuse.
Implementation Method 1
a nut holding part that is provided integrally with the bolt holding part, is configured to be provided on an outer periphery of the nut, and is configured to prevent rotation of the nut by restoring force
Data Source
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AI summary
Provided is a fall prevention tool (1) for a nut (N), which is installed in a bolt (B) to which the nut (N) is attached, the tool including a bolt holding part (2b) into which the bolt (B) is inserted, and a nut holding part (3) that is provided integrally with the bolt holding part (2b), is provided on an outer periphery of the nut (N), and is configured to prevent rotation of the nut (N) by restoring force.