Aircraft Engine Access Panel with Handle-Operated Transmission
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Solution Overview
Problem
Existing aircraft engine mounting structures face issues with screw loss and damage to access panels during maintenance, compromising aerodynamic continuity and safety.
Innovation Solution
A modular assembly with moveable access panels and a handle-operated transmission system that allows for secure, screw-free access, ensuring the panels remain attached and aerodynamically integrated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If access panels are fixed with screw assemblies, then the panels can be removed for maintenance access, but there is a risk of losing screws and damaging the access panels
Solution Approach 1:
The invention extracts the fastening function from the access panel assembly by removing the need for screws entirely. The access panels are designed to be retained by the thrust reverser cover structure itself through recesses and protrusions, separating the panel retention function from traditional screw fastening.
Solution Approach 2:
The thrust reverser cover acts as an intermediary element that provides both the mounting surface for the access panels and the retention mechanism. The cover's recesses and protrusions mediate the connection between the access panels and the engine mounting structure, eliminating the need for separate fasteners.
2Ease of repair
If access panels are made removable, then maintenance access to joints is facilitated, but the aerodynamic continuity between pod and wing is compromised
Solution Approach 1:
The access panels are designed with moveable characteristics, allowing them to be positioned in different states. When closed, they maintain aerodynamic continuity; when opened, they provide maintenance access. The panels can move between these states while remaining structurally integrated with the thrust reverser cover.
Solution Approach 2:
The invention merges the access panel function with the thrust reverser cover structure. The panels are integrated into the cover's aerodynamic surface, combining the protective cover function with the access panel function into a single unified structure that maintains aerodynamic continuity when closed.
3Reliability
If traditional screw assemblies are used to fix access panels, then the panels can be securely attached, but the complexity of maintenance operations increases due to screw removal and reinstallation
Solution Approach 1:
The fastening system is segmented into integrated retention features distributed across the thrust reverser cover and access panels. Instead of centralized screw assemblies, multiple recesses and protrusions are distributed throughout the panel-cover interface, providing secure attachment while simplifying maintenance operations.
Data Source
AI summary
An assembly for an aircraft with an engine includes an attachment device intended to support the engine, a pod intended to surround the engine and including a cover, joints intended to allow articulation of the cover and allow movement of the cover relative to the attachment device between a closed position and an open position, and at least one access panel mounted moveably on the cover between a closed position, in which the access panel extends continuously between the cover and the attachment device when the cover is in the closed position, and an open position in which the access panel is remote from its closed position. The assembly includes a handle which can be operated from the outside of the cover between a first position and a second position, and a transmission system provided to move said or each access panel from its closed position to its open position.