Threaded Bolt Protective Cap With Gravity Drainage Slots
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Solution Overview
Problem
Existing protective caps for threaded bolts fail to effectively prevent moisture damage during upside-down installations, as fluid accumulation and condensation can occur due to inadequate sealing and surface roughness, leading to potential corrosion.
Innovation Solution
A protective cap design featuring a plug with slots at its outermost end, allowing liquids to escape due to gravity, combined with a disk and ring structure for easy attachment and a screwing aid for stability, ensures reliable drainage and secure fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the protective cap is sealed completely to prevent moisture penetration, then corrosion protection is improved, but fluid accumulation occurs during upside-down installation due to condensation and rough surfaces
Solution Approach 1:
Instead of trying to prevent all fluid entry, the invention inverts the approach by providing controlled exit paths (drainage openings) at the lowest point of the cap. This allows the cap to tolerate some fluid penetration while actively draining accumulated condensate and external liquids away from the screw connection, resolving the contradiction between sealing and drainage needs
2Productivity
If drainage openings are made large to improve fluid escape, then drainage efficiency is improved, but dirt and particles can enter through the openings
Solution Approach 1:
The invention applies local quality by creating specific geometric features in the drainage openings - elongated slots oriented perpendicular to the gravity vector, with dimensions optimized for drainage (length significantly greater than width). This local geometric optimization allows efficient fluid escape while the narrow width prevents particle ingress, resolving the contradiction between drainage efficiency and contamination prevention
3Reliability
If the protective cap is made with complex internal structures for drainage, then fluid drainage is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The invention segments the drainage function into distinct elements: cap body with integrated drainage openings, a separate plug component that seals the opening when not in use, and a retaining ring for securing the plug. This segmentation allows simple manufacturing of each component while achieving reliable drainage functionality through their combination, resolving the contradiction between drainage reliability and manufacturing simplicity
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 cap effectively prevents liquid accumulation and corrosion by allowing gravity-driven drainage, while maintaining structural simplicity and ease of use, reducing the risk of dirt entry and enhancing stability.
Implementation Method 1
The opening is located at the outermost end facing away from the sealing lip and allows fluid to escape independently due to gravity
Data Source
Figure 1~4
Figure 5~6
AI summary
Protective cap for threaded bolts, comprising a cap head (1) and a cap shell (2), the latter having a sealing lip (4) on its end face opposite the cap head (1). A plug (11) is provided on the cap head (1), in which at least one opening is formed.