Shielding Termination Assembly for Flexible 360-Degree EMI Connection
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Solution Overview
Problem
Conventional electrical shielding termination systems face challenges in installation due to large bend radius issues with high amperage power feeders, particularly in vehicle applications, where shielding individual phases is not feasible due to weight concerns, and existing methods struggle with effective circumference connections for electromagnetic interference (EMI) protection.
Innovation Solution
A conductor shielding termination assembly comprising a conductive housing tube with threads, a non-conductive shoulder bushing, and a jam nut with threads that trap the shielding termination, providing flexible compression and stress relief through a gasket and flange configuration, allowing for a 360-degree connection and easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If shielding is done at the harness bundle level for EMI protection, then EMI shielding effectiveness is improved, but the bundle bend radius becomes too large to facilitate installation
Solution Approach 1:
The patent divides the shielding structure into separate components: individual phase feeders are shielded independently rather than as a bundled group. Each feeder has its own shielding termination assembly with housing tube, shoulder bushing, and jam nut, allowing smaller bend radii and easier routing through tight spaces while maintaining EMI protection effectiveness.
2Object-affected harmful factors
If shielding of large gauge power feeders is done, then EMI shielding effectiveness is improved, but vehicle weight increases
Solution Approach 1:
The patent applies shielding selectively to individual high-amperage power feeders that require EMI protection rather than shielding all conductors uniformly. The shielding termination assembly is only installed on feeders where EMI susceptibility is a concern, optimizing weight by eliminating unnecessary shielding material on other conductors while maintaining protection where needed.
3Reliability
If internal cone clamping geometry or band clamps are used for shielding termination, then shielding connection is achieved, but the system becomes difficult to repair
Solution Approach 1:
The patent employs a threaded jam nut that can be dynamically adjusted, loosened, and removed to facilitate repair and rework. The threading mechanism allows the shielding termination to be easily disassembled and reassembled multiple times, providing both reliable electrical connection and repairability that permanent crimp-type clamps cannot offer.
Data Source
AI summary
A conductor shielding termination assembly can include a housing tube defining an inner diameter housing channel therethrough and having housing threads on an outer diameter thereof. The housing tube can be made of conductive material. The assembly can include a shoulder bushing configured to insert within the inner diameter housing channel of the housing tube. The shoulder bushing can define an inner diameter bushing channel sized to receive an unshielded portion of a conductor. The assembly can include a jam nut comprising a nut inner diameter channel sized to receive a shielded portion of the conductor and nut threads on an inner diameter thereof configured to mesh with the housing threads. The jam nut and housing tube can be configured to trap a shielding termination within the meshed housing threads and jam nut threads.