Cable Bundle Termination With Sealing Recess and Shield Grounding
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Solution Overview
Problem
Existing termination arrangements for cable bundles surrounded by electromagnetic shields and insulation tubing fail to effectively prevent the entry of foreign matter, particularly liquids, due to inadequate sealing and grounding mechanisms.
Innovation Solution
A termination arrangement featuring a body with a cable cavity, an annular-shaped sealing recess, and a collar that secures the electromagnetic shield and insulation tubing, ensuring a secure ground connection and sealing by applying axial force through shield and tubing ferrules, which prevents foreign matter from entering the cable cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clamping element is used to ground the electromagnetic shield to the clamping collar, then the ground connection is adequate, but foreign matter and liquids can enter the clamping element through the interface between the clamping element and electromagnetic shield
Solution Approach 1:
The patent combines the grounding function and sealing function into a single integrated electromagnetic shield structure. The shield is designed to both establish electrical contact with the clamping collar for grounding and form a liquid-tight seal with the clamping element, eliminating the need for separate grounding and sealing mechanisms.
Solution Approach 2:
The patent introduces an intermediary sealing mechanism at the interface between the clamping element and electromagnetic shield. This intermediary structure prevents foreign matter and liquids from penetrating through the interface while maintaining the electrical grounding connection, thus resolving the contradiction between adequate grounding and foreign matter prevention.
2Strength
If a crimped ring is used to attach the electromagnetic shield to the body, then the shield is secured, but sealing becomes difficult and foreign matter can enter the body
Solution Approach 1:
The patent merges the attachment function and sealing function into a unified electromagnetic shield design. The shield is configured to be securely attached to the body while simultaneously providing a seal that prevents liquid ingress, eliminating the need for separate crimped ring attachment and sealing components.
Solution Approach 2:
The patent employs a flexible electromagnetic shield structure that can conform to the body interface while maintaining both mechanical attachment and sealing properties. This flexible shield design allows for secure attachment without compromising the sealing capability, preventing foreign matter entry.
Data Source
AI summary
A termination arrangement for a cable bundle includes a body with a cable cavity extending therethrough with the plurality of cables extending into the cable cavity. The body includes a cable attachment end through which the cable bundle enters the cable cavity. The cable attachment end includes an annular-shaped sealing recess radially surrounding a portion of the cable cavity. The sealing recess has an inner wall, an outer wall radially surrounding the inner wall, and a bottom wall joining the inner wall and the outer wall. An electromagnetic shield radially surrounds the cable bundle outside of the cavity and extends into the sealing recess. An insulation tubing radially surrounds the electromagnetic shield and the cable bundle outside of the cable cavity and extends into the sealing recess. A collar secured to the cable attachment end retains the electromagnetic shield and the insulation tubing within the sealing recess.