Nested Threaded Fastener Pair for Hidden Thread Containment
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Solution Overview
Problem
Conventional threaded fasteners are visually unappealing and pose a risk of injury due to exposed threads, and they require multiple sizes to minimize thread exposure, which is inefficient and costly.
Innovation Solution
A threaded fastener pair comprising a male and female fastener with equal outer diameters and lengths, where the female fastener has an unthreaded bore, allowing for deep threading and accommodating excess thread within the connection, providing a secure and visually clean joint without exposed threads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bolts with exposed threads are used, then the connection is secure and reliable, but the exposed threads are visually unappealing and pose injury risk
Solution Approach 1:
The male threaded fastener is nested within the female threaded fastener, with the male fastener inserted through the female fastener's threaded bore. This nesting arrangement allows the male fastener's threads to be contained within the female fastener's structure, eliminating exposed threads while maintaining the secure connection through threaded engagement between the two fasteners.
2Object-affected harmful factors
If various sized fasteners are provided to minimize thread protrusion, then the injury risk is reduced, but the device complexity and inventory requirements increase
Solution Approach 1:
The female threaded fastener serves multiple functions: it provides a receiving structure for the male fastener, contains the male fastener's threads to eliminate exposure, and its outer surface can be finished to provide a visually appealing appearance. This multi-functionality allows a single female fastener design to work with male fasteners of various lengths, reducing the need for multiple female fastener sizes.
3Reliability
If the female fastener has deep threading to accommodate excess thread, then the male fastener can be fully contained, but the manufacturing complexity increases
Solution Approach 1:
The fastener system is segmented into two distinct components: a male threaded fastener and a female threaded fastener. The threading function is divided between these two parts, with each fastener having its own threaded portion. This segmentation allows each fastener to be manufactured using standard threading processes, avoiding the need for manufacturing a single fastener with excessively deep or complex threading.
Data Source
AI summary
A threaded fastener pair, including: a first threaded fastener with a male threaded portion; and a second threaded fastener with a female threaded portion, the female portion being configured to receive the male threaded portion, wherein the first threaded fastener is formed with a shank having an outer diameter approximately equal to an outer diameter of the second threaded portion, the second threaded fastener has a length equal to or greater than that of the first threaded fastener and the length of the first threaded fastener is at least 45 mm.