Self-Threading Bolt Cap With Asymmetric Blades Against Loosening
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Solution Overview
Problem
Existing bolt caps for toilets are difficult to install, prone to loosening during use and cleaning, and accumulate dirt, especially when incorrectly installed or knocked out of position.
Innovation Solution
A self-threading bolt-covering cap with a cover shell and three angled blades that provide easy installation with little resistance when threading onto a bolt but greater resistance when unthreading, ensuring a secure fit resistant to inadvertent loosening while allowing intentional removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional bolt caps are used, then they provide basic coverage, but they are difficult to install and prone to loosening during use
Solution Approach 1:
The cap employs asymmetric blade geometry where the blades are angled to provide different resistance characteristics during installation versus use. During installation, the blades deflect easily in the threading direction, but during use, the same blade geometry provides resistance to loosening forces, creating dynamic behavior that resolves the contradiction between ease of installation and resistance to loosening
Solution Approach 2:
The cap features three angled blades positioned asymmetrically around the cap body, with each blade having a specific angle optimized to guide installation while preventing loosening. This asymmetric configuration allows the cap to be easily threaded onto the bolt during installation but creates mechanical interference that resists counter-clockwise loosening forces during toilet use
2Reliability
If bolt caps are made secure and tight-fitted, then they resist loosening, but they become difficult to install and remove
Solution Approach 1:
The blade design creates dynamic resistance characteristics where the cap offers low installation resistance during the threading process, then transitions to high security during normal use. The blades are angled to deflect easily during installation but lock into position to prevent loosening, providing both ease of installation and secure fit without compromise
3Object-affected harmful factors
If conventional bolt caps are used, then they cover the bolt, but they accumulate dirt and grime, especially when knocked out of position
Solution Approach 1:
The asymmetric blade configuration provides dynamic stability where the blades naturally resist displacement forces that would cause the cap to knock out of position. This secure positioning prevents the cap from shifting into dirt-trapping configurations, while the blade geometry itself resists accumulation by maintaining proper cap alignment and position throughout toilet use
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 bolt-covering cap facilitates easy installation and secure, long-term attachment to bolts, resisting unintentional loosening during use and cleaning while allowing easy removal when needed, thus addressing the issues of installation and maintenance for toilets with varying bolt lengths.
Implementation Method 1
three angled blades which slightly deflect in one direction, requiring less turning force, and which resist deflection in the opposite direction, requiring more turning force and resisting inadvertent loosening
Data Source
AI summary
A bolt-covering cap which is self-threading and gives little resistance when being threaded onto a bolt but greater resistance when being unthreaded, providing for easy installation, a tight and secure fit resistant to inadvertent loosening, and intentional removal when needed. The bolt-covering cap provides a cover shell and three angled blades which slightly deflect in one direction, requiring less turning force, and which resist deflection in the opposite direction, requiring more turning force and resisting inadvertent loosening.