Cap Coupling Ring Structure to Prevent Reverse Loosening
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Solution Overview
Problem
In plumbing, the cap can inadvertently loosen in the opposite direction during installation or replacement, leading to fluid leaks due to miss-assembly and separation from the body.
Innovation Solution
A cap loosening prevention device featuring a body ring with saw-tooth protrusions and round protrusions, where the saw-tooth protrusions have specific angled surfaces to lock the cap in place, preventing reverse rotation, and the round protrusions provide additional locking steps to secure the cap, while the body ring's cut portion and protruding part facilitate assembly and grip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cap is freely rotatable on the body for easy installation and replacement, then the ease of operation is improved, but the cap may inadvertently loosen in the opposite direction leading to separation and fluid leaks
Solution Approach 1:
The body ring features asymmetric saw-tooth protrusions with inclined surfaces that allow easy rotation in the installation direction while preventing rotation in the loosening direction. The asymmetric geometry creates a ratchet-like mechanism where the cap can be screwed on freely but cannot be unscrewed, resolving the contradiction between ease of operation and coupling security.
Solution Approach 2:
The saw-tooth protrusions create preliminary anti-action by providing mechanical resistance before the cap can loosen in the opposite direction. The inclined surfaces of the protrusions engage with the cap to prevent reverse rotation, thereby preventing the harmful effect of cap separation and fluid leakage before it can occur.
2Reliability
If the cap is tightly secured to prevent loosening, then the reliability is improved, but the ease of operation for installation and replacement deteriorates
Solution Approach 1:
The asymmetric saw-tooth design creates directional asymmetry where the cap experiences minimal resistance during installation (screwing on) but maximum resistance during removal (unscrewing). This allows the cap to be tightly secured against loosening while maintaining ease of installation, resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The mechanism dynamically adapts its locking behavior based on rotation direction. During installation, the cap rotates freely over the inclined surfaces of the protrusions. During attempted loosening, the same protrusions engage to prevent rotation. This dynamic response resolves the contradiction by providing different mechanical characteristics for different operational phases.
3Productivity
If the cap can be quickly removed for pipe replacement, then the productivity is improved, but the cap may separate from the body causing fluid leaks
Solution Approach 1:
The saw-tooth protrusions provide preliminary anti-action by preventing the cap from rotating in the loosening direction before separation can occur. This mechanical barrier ensures that even during rapid pipe replacement operations, the cap cannot inadvertently loosen or separate, thereby preventing fluid leakage while maintaining high productivity.
Solution Approach 2:
The design converts the potential harm of cap loosening into a beneficial locking mechanism. The same asymmetric geometry that could potentially allow loosening is designed to prevent it, turning the rotation mechanism into a security feature that actively prevents fluid leakage during rapid installation and replacement operations.
Data Source
AI summary
A cap loosening prevention device prevents a cap from loosening when the cap is fitted to a body. The device includes a body ring formed in a circular shape along the circumference of the body and having a cut portion. A protruding part is formed on the outward surface of the body ring. The protruding part has an incline with respect to the outward direction of the body ring, and the uppermost end of the protruding part is cut perpendicularly with respect to the outward direction of the body ring. The cap is prevented from completely loosening in the direction opposite to the rotational direction of the cap when the cap is fitted to the body, such that the cap can be firmly coupled to the body without separating from the body. The rotation of the cap is minimized to enable a rapid operation when a pipe is replaced.