Nut Fall Prevention Clip With Restoring-Force Locking
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Solution Overview
Problem
Existing fall prevention tools for nuts attached to bolts require strong force to secure them, making it difficult to detach without damaging the tool 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 secured with strong force to prevent nut loosening, then the nut can be effectively prevented from falling off, 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 that secures to the bolt with strong force for reliable nut retention, and a nut holding part that contacts the nut outer periphery to prevent rotation. This segmentation allows each part to perform its specific function optimally while enabling easy detachment through the handle part that changes the diameter of the bolt holding part.
Solution Approach 2:
The bolt holding part is designed with dynamic characteristics, allowing its diameter to be changed via the handle part. This enables the tool to be easily attached to and detached from the bolt by adjusting the diameter, while maintaining strong securing force during operation through the restoring force mechanism.
2Strength
If the fall prevention tool is attached firmly to the bolt, then the nut is prevented from falling off, but the tool cannot be easily detached without destruction
Solution Approach 1:
The attachment force parameter is dynamically controlled through the handle part that changes the diameter of the bolt holding part. The restoring force mechanism allows the tool to be attached with sufficient strength to prevent nut falling, while enabling easy detachment by changing the diameter parameter, thus maintaining tool reusability without destruction.
3Ease of manufacture
If the fall prevention tool uses a simple structure, then it is easy to manufacture, but it cannot provide sufficient holding force to prevent nut loosening
Solution Approach 1:
Different parts of the tool have different functional qualities: the bolt holding part is designed to change diameter for easy attachment/detachment, while the nut holding part has a polygonal shape to effectively prevent nut rotation. This local quality differentiation allows the simple single-metal-wire structure to provide sufficient holding force through strategically designed functional zones.
Solution Approach 2:
Multiple functions are merged into a single integrated tool structure formed from one metal wire: the bolt holding part for securing to the bolt, the nut holding part for preventing nut rotation, and the handle part for diameter adjustment. This merging maintains manufacturing simplicity while achieving reliable nut retention through combined functional effects.
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 detachment and reuse without destruction.
Implementation Method 1
a nut holding part that is provided integrally with the bolt holding part, is provided on an outer periphery of the nut, and is configured to prevent rotation of the nut by restoring force
Data Source
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.