Wheel Lock Fastener With Rotating Collar Against Pliers Removal
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Solution Overview
Problem
Existing anti-theft screw devices for securing vehicle wheels are vulnerable to lateral manipulation with pliers and have fragile coupling mechanisms, which can be exploited for fraudulent removal.
Innovation Solution
An anti-theft fixing device with a proximal part featuring a freely rotating annular element and a centering stud with a freely rotating sleeve, where the key coupling is through matching impressions with elevations and radial extensions, making it inaccessible to pliers and requiring a specific tool for torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the proximal part has a cylindrical head with cells positioned randomly on its circumference, then the anti-theft function is achieved through coding, but the device can be grasped from lateral approach and manipulated with pliers
Solution Approach 1:
The patent transitions from a two-dimensional circular code arrangement to a three-dimensional code structure by positioning elevations at different heights on the proximal part. This vertical dimension prevents pliers from grasping the code features, as they extend above and below the horizontal plane where pliers would apply force.
Solution Approach 2:
The patent uses simple geometric features (elevations, grooves, radial extensions) that can be easily manufactured through cold forging without complex machining. These features serve as the code and are integrated into the proximal part structure, eliminating the need for separate coding components.
2Ease of operation
If the coupling uses lugs cooperating with sockets, then the key coupling is achieved, but the lugs present certain fragility
Solution Approach 1:
The patent removes the separate lug components from the design and integrates the coupling features directly into the proximal part structure. The elevations and grooves are formed as integral features of the proximal part body, eliminating the fragility associated with separate lug components that could break or disengage.
Solution Approach 2:
The patent integrates multiple functions (structural support, coding, and torque transmission) into a single composite structure. The proximal part combines the body, code features, and coupling elements as one integral component, improving strength by eliminating weak interfaces between separate parts.
3Object-affected harmful factors
If the annular element is added for free rotation, then seizure from outside is prevented, but the device complexity increases
Solution Approach 1:
The patent combines the annular element with the code features in a single integrated structure. The code elevations are positioned on the annular element itself rather than being separate components, merging the anti-seizure function with the coding function into one element.
Solution Approach 2:
The annular element serves multiple functions simultaneously: it provides the free-rotation anti-seizure mechanism, carries the code elevations for identification, and structures the radial extensions that define the code. This multi-functionality reduces overall device complexity despite adding the annular component.
4Reliability
If the code elevations are positioned at different heights, then the code complexity increases providing better security, but the manufacturing precision requirements increase
Solution Approach 1:
The patent uses variations in elevation height as the primary coding parameter, creating a three-dimensional code structure. Different heights provide multiple states for each code position, increasing security without requiring an increase in the number of code positions or radial complexity.
Solution Approach 2:
The patent creates local variations in elevation height at specific angular positions around the proximal part. Each position has a unique height profile that contributes to the overall code, allowing complex information to be encoded in localized features rather than requiring uniform complexity throughout the entire structure.
Data Source
Figure 1~3
Figure 4~5
AI summary
The invention relates to an anti-theft fastening device for securing a wheel to the hub of a motor vehicle, of the type comprising a threaded distal part (2), and a drive proximal part, allowing the transmission to the threaded part of a tightening or loosening torque through a key (4), and wherein the coupling of the key (4) with the drive part is achieved through concordant impressions (37, 41) which comprise on the one hand said drive part and on the other hand said key (4).The proximal part (3) comprises on the one hand an annular element (33) disposed at the periphery, mounted in free rotation axially on the body (30) of the proximal part (3), on the other hand, internal to the annular element (3), the drive impression (37), concordant with that (41) of the key (4), while the impression is in the form of at least one elevation projecting from a front face to a height less than or equal to that of said annular element (33), and whose peripheral contour has radial extensions of any shape.