Electrical Cabinet Hinge Duct for Torsion-Based Harness Routing
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Solution Overview
Problem
Electrical harnesses in aircraft electrical cabinets are prone to mechanical damage and interference due to the bending motion when the door is opened or closed, leading to potential damage and resistance issues.
Innovation Solution
A door hinge with a chute along the pivot axis that receives and secures an intermediate section of the harness, allowing it to be inserted laterally and reducing mechanical stress by transitioning the harness from bending to torsion, using fastening elements like hooks and clamps to manage the harness sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the harness is left as a free loop between the door and fixed part, then the harness can accommodate door movement, but the harness is subjected to localized mechanical tension and bending that can damage it
Solution Approach 1:
The patent introduces a hinge as an intermediary component between the door and fixed part. The hinge includes a chute that receives and guides the harness, transforming the direct bending and tensioning of the harness into controlled movement through the chute. This mediator protects the harness from direct mechanical stress while enabling door operation.
Solution Approach 2:
The harness is segmented into different sections: a first section that remains fixed, a second section that passes through the chute, and a third section that connects to the door. This segmentation allows each section to handle different types of stress, with the second section being guided through the chute to prevent excessive bending and tension.
2Reliability
If the harness loop is made long enough to avoid mechanical tension, then the harness can move freely, but the loop protrudes into the interior of the electrical cabinet and may rub or catch on components
Solution Approach 1:
The chute acts as an intermediary structure that contains and guides the harness loop. Instead of allowing the harness to form a loose loop that protrudes into the cabinet interior, the chute channels the harness along a defined path, preventing it from contacting other components while maintaining the necessary flexibility for door movement.
3Reliability
If the harness is securely fastened to both door and fixed part, then the harness is mechanically stable, but the harness resists door opening and closing movement
Solution Approach 1:
The harness arrangement transitions from a static, fully secured configuration to a dynamic system where the harness can move relative to the hinge. The first section is secured to the fixed part, the second section moves through the chute, and the third section connects to the door, allowing the harness to dynamically adapt to door position changes without resistance.
Data Source
AI summary
A door hinge for an electrical cabinet includes a pathway for receiving an electrical harness, the hinge including two parts that are connected together and are rotatable with respect to one another about a pivot axis, the hinge including a duct that extends along the pivot and is designed to receive an intermediate section of the harness along the pivot axis, the duct including a longitudinal slot for the lateral insertion of the intermediate section of the harness into the duct while the intermediate section extends parallel to the duct. An electrical cabinet includes such a door hinge.