Cab Power Connector Asymmetric Coupling Mechanism
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Solution Overview
Problem
Operators of cargo vehicles face challenges in ensuring that electrical connectors for different amperage circuits are not inadvertently connected, as existing systems lack effective mechanisms to restrict interconnection of wire harnesses with dissimilar current ratings, potentially leading to overheating or damage from mismatched electrical loads.
Innovation Solution
A wiring arrangement with a coupling mechanism that electrically interconnects wire harnesses of similar current ratings while preventing connections between those with dissimilar ratings, using a housing with a radially outward projection, axially extending rib, and circumferentially extending recess on one harness, and a flexible finger and cylindrical wall on the other, ensuring secure and safe connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wire harnesses with different current ratings are allowed to connect freely, then ease of operation is improved, but safety and reliability deteriorate due to risk of overheating and damage from mismatched electrical loads
Solution Approach 1:
The coupling mechanism employs asymmetric geometric features including a radially outwardly extending projection on one housing and a corresponding recess in the other housing, along with axially extending ribs and grooves. These asymmetric features create a mechanical interlock that allows connection only between identical coupling mechanisms, thereby preventing mismatched wire harnesses from connecting while maintaining ease of operation for correctly matched components.
2Reliability
If coupling mechanisms with complex geometric features are implemented, then reliability is improved by preventing mismatched connections, but device complexity increases
Solution Approach 1:
The coupling mechanism is segmented into distinct geometric features: a radially outwardly extending projection, axially extending ribs, circumferential grooves, and a recess. These segmented features work together to provide reliable mismatch prevention through mechanical interlocking, while each individual feature remains relatively simple in design and manufacture.
3Reliability
If geometric features such as projections and ribs are added to prevent mismatched connections, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
Multiple protective geometric features including the radially outwardly extending projection, axially extending ribs, circumferential grooves, and recess are merged into a single integrated coupling mechanism structure. This consolidation provides comprehensive mismatch prevention functionality while simplifying the manufacturing process compared to assembling multiple separate protective components.
Data Source
AI summary
A wiring arrangement for interconnecting an alternating current power source to a receptacle within a motor vehicle includes a first wire harness having a current rating and a second wire harness having a similar current rating. A coupling mechanism electrically interconnects the first and second wire harnesses of similar current ratings. The coupling mechanism restricts interconnection of wire harnesses having dissimilar current ratings.