Dual-Locking Lug Nut System with Asymmetric Key Surfaces
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Solution Overview
Problem
Existing locking lug nut systems can be easily defeated by unauthorized users using standardized sockets or tools, and may be removed using hammers, chisels, or pliers, lacking sufficient security for anti-theft applications.
Innovation Solution
A dual-locking lug nut system comprising a primary locking lug nut with a non-hexagonal irregular key surface and a secondary locking lug nut with a different non-hexagonal key surface, requiring a specialized key with multiple key elements to engage both, and a friction-reducing element or coating for enhanced security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-hexagonal key surface is used on a locking lug nut, then security against unauthorized removal is improved, but the lug nut can still be defeated using friction from a standardized socket or forced removal with hammer and chisel
Solution Approach 1:
The locking system is divided into multiple independent locking lug nuts, each with its own key surface pattern. This segmentation ensures that defeating one lug nut does not compromise the entire wheel security, as other lug nuts remain protected by their unique key patterns.
Solution Approach 2:
Each locking lug nut features a unique asymmetric key surface pattern that does not match standard sockets or common tools. The irregular geometry creates mechanical interference that prevents standardized tools from applying sufficient torque or force to remove the lug nuts.
2Reliability
If a specialized key pattern is required for each locking lug nut, then unauthorized removal becomes more difficult, but the system complexity increases
Solution Approach 1:
The locking lug nuts are designed with key surfaces that can be engaged by a universal key tool. The key tool incorporates multiple key elements that can interface with different key surface patterns, allowing a single tool to service multiple locking lug nuts with varying patterns.
Solution Approach 2:
The key surfaces are pre-configured with specific geometric patterns during manufacturing. These pre-established patterns enable rapid identification and engagement with the appropriate key elements, eliminating the need for complex real-time adjustments or multiple specialized tools.
3Reliability
If multiple locking lug nuts with different key patterns are used, then security is enhanced, but the ease of operation with standard tools is reduced
Solution Approach 1:
A key tool serves as an intermediary between the user and the locking lug nuts. The key tool translates standard user actions into the specific key pattern engagements required by each locking lug nut, maintaining ease of operation while ensuring security.
Solution Approach 2:
The key tool is designed with dynamic adaptability, allowing it to adjust its key elements to match different key surface patterns on various locking lug nuts. This dynamic configuration enables the same tool to efficiently operate on multiple lug nuts with different security patterns.
Data Source
AI summary
A locking lug nut system includes a primary locking lug nut, a secondary locking lug nut, and a key. The locking lug nuts each have non-hexagonal irregular key surfaces and the key has a non-hexagonal key element engageable with the key surface of at least one of the locking lug nuts.