Decorative Ring Device for Aircraft Window Lining Tolerance
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Solution Overview
Problem
Current aircraft interior lining installations require tight tolerances for alignment with structural window rings, leading to aesthetically unacceptable installations and frequent rework due to misalignments and interference with window clips or other structural elements.
Innovation Solution
A decorative interface ring with a substantially flat flange and multiple bearing ring bosses that match the curvature of the window ring's inner surface, using friction fit legs to constrain the interface ring to the window ring rim, allowing for a low-tolerance interface that accommodates misalignments with a resilient seal for a clean and aesthetically pleasing installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If tight tolerance alignment is required for the interface between structural window ring and interior lining window reveal, then manufacturing precision is improved, but device complexity and installation difficulty increase
Solution Approach 1:
The interface is segmented into three distinct components: the structural window ring, the decorative interface ring with bearing bosses and friction fit legs, and the window reveal. This segmentation allows each component to be manufactured independently with relaxed tolerances, while the cumulative effect of multiple contact points (multiple bearing ring bosses and friction fit legs) achieves the required overall alignment precision without requiring any single component to be manufactured with extreme precision.
Solution Approach 2:
The decorative interface ring acts as an intermediary component between the structural window ring and the window reveal. It mediates the interface by providing multiple bearing ring bosses that contact the window ring rim and friction fit legs that engage with the window reveal, thereby distributing alignment requirements across multiple contact points rather than requiring a single precise interface.
2Manufacturing precision
If tight tolerance alignment is required for the interface between structural window ring and interior lining window reveal, then manufacturing precision is improved, but ease of operation deteriorates
Solution Approach 1:
The interface design incorporates friction fit legs that allow for dynamic adjustment during installation. The friction fit provides enough resistance to hold position once installed, but allows for slight movements and adjustments to accommodate misalignments. This dynamic characteristic enables installers to easily adjust the window reveal position within relaxed tolerance limits without requiring precise pre-alignment.
Solution Approach 2:
The interface design changes the tolerance parameter from tight to relaxed by introducing multiple bearing ring bosses and friction fit legs. These features distribute alignment requirements across multiple contact points, effectively changing the system's tolerance parameter to allow for greater misalignment while maintaining proper function and appearance.
3Manufacturing precision
If tight tolerance alignment is required for the interface between structural window ring and interior lining window reveal, then manufacturing precision is improved, but loss of time increases
Solution Approach 1:
The interface design incorporates built-in alignment compensation features (multiple bearing ring bosses and friction fit legs) that cushion against misalignment before installation problems occur. These features beforehand accommodate potential tolerance variations and misalignments, preventing installation failures and the need for rework. The resilient seal and friction fit characteristics provide a margin of error that absorbs alignment variations without requiring time-consuming adjustments or reinstallation.
4Adaptability or versatility
If flexible bellows seal is used extending from lining into structural window ring, then adaptability is improved, but object-affected harmful factors increase
Solution Approach 1:
The harmful flexible bellows seal is extracted and replaced with a rigid decorative interface ring structure. The new design takes out the problematic flexible element that interfered with window clips and replaces it with a structured assembly of bearing ring bosses and friction fit legs that provide the necessary flexibility and adaptation without physical interference with window clips or other structural elements.
Solution Approach 2:
The decorative interface ring serves as an intermediary that eliminates the harmful effect of the bellows seal. Instead of allowing direct contact between the lining and structural window ring that caused interference with window clips, the intermediary interface ring with its bearing bosses and friction fit legs provides a mediated connection that adapts to misalignments without interfering with window clips or other structural elements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces the need for precise alignment and rework by providing a flexible interface that allows the window reveal to float within relaxed tolerance limits, enhancing the installation process and maintaining an aesthetically pleasing cabin appearance.
Implementation Method 1
Multiple friction fit legs extend from the flange and are received within and constrained by the interface ring to the widow ring rim
Implementation Method 2
allowing for a low-tolerance interface that accommodates misalignments with a resilient seal for a clean and aesthetically pleasing installation
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
An interior lining interface incorporates a decorative interface ring (40) having a substantially flat flange (44) with multiple bearing ring bosses 48) on an inner surface (50) of the flange (44) for engagement of an inner surface (58) of a rim (14) of a window ring (12); multiple friction fit legs (54) extend from the flange (44) and are received within and constraining the interface ring (40) to the widow ring rim (14); a window reveal (18) has a mating surface contacting the flange. A method for establishing a low tolerance interface between a window ring (12) and a window reveal (18) is also disclosed.