Electrical Locking Hub Nut with Rounded Rim for Wiring Protection
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Solution Overview
Problem
Current electrical conduit fittings often damage wiring during installation, requiring two-person teams for labor-intensive pulling and posing risks of loose connections and contamination, with multipart connectors being cumbersome and prone to errors.
Innovation Solution
A toroid-shaped locking hub nut with a rounded rim and central axial bore, featuring a smooth surface to guide wiring and minimize edge interaction, along with external ribs for tool engagement and gripping projections for secure junction box fit, eliminating the need for lock nuts and allowing universal threading for various conduit sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional electrical conduit fittings are used, then connections can be made, but wiring insulation is damaged during pulling operations
Solution Approach 1:
The locking hub nut incorporates a rounded rim with a substantially smooth surface that guides wiring through the central axial bore. This curved, smooth surface eliminates sharp edges that would otherwise damage wire insulation during pulling operations, directly resolving the contradiction between connection reliability and wiring protection.
2Productivity
If wiring is pulled through conduit by one person, then labor cost is reduced, but wire insulation is frequently damaged during pulling
Solution Approach 1:
The rounded rim with smooth surface guides the wiring through the central axial bore, preventing damage during single-person pulling operations. This allows one worker to safely pull wiring through the conduit without damaging insulation, improving productivity while eliminating the harmful effect of wire damage.
Solution Approach 2:
The rounded rim acts as an intermediary element between the wiring and the locking hub nut body, providing a smooth guiding surface that protects the wiring during installation while maintaining the structural integrity of the connector.
3Ease of operation
If snap-in connectors are used, then installation is quick, but electrical connection is loose and contaminants can enter
Solution Approach 1:
The locking hub nut merges the functions of a hub, nut, and wire guide into a single integrated component. The rounded rim provides wire guidance while the threaded central axial bore provides secure locking, combining protective and connective functions to achieve both ease of operation and reliable electrical connection.
Solution Approach 2:
The locking hub nut is designed as a single-use, non-reusable component that is destroyed during disassembly to prevent reuse and ensure safety. This disposable nature ensures that each connector provides full protective function during installation and cannot be compromised by improper reuse, maintaining reliability while keeping the design simple for quick installation.
4Reliability
If multipart connectors are used, then connections can be made, but disassembly and reassembly is cumbersome and requires special tools
Solution Approach 1:
The locking hub nut integrates multiple functions into a single component: the hub body provides structural support, the rounded rim guides wiring, the threaded central axial bore provides locking capability, and the gripping projections enable tool engagement. This consolidation eliminates the need for multiple separate parts and special tools, making disassembly and reassembly straightforward while maintaining connection stability.
5Reliability
If multipart connectors are used, then connections can be made, but large amount of space is used within the junction box
Solution Approach 1:
The locking hub nut consolidates multiple components into a single compact unit with integrated wire guidance, locking mechanism, and junction box engagement features. This reduces the total volume required within the junction box while maintaining all necessary connection stability functions.
Solution Approach 2:
The locking hub nut is designed with universal threading that accommodates various conduit sizes and materials, and gripping projections that engage with different junction box configurations. This multi-functionality allows a single component design to serve multiple purposes across different installation scenarios, reducing the need for multiple specialized parts and minimizing space requirements.
Data Source
AI summary
The invention relates to an electrical connector locking hub nut that does not damage the wiring during pulling, frees up manpower by allowing one person rather than two to be able to do the pulling, has a simplified design, and which has universal threading for conduit of all currently approved sizes and materials.