Telescoping Pin Attachment Assembly for Aircraft Secondary Doors
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Solution Overview
Problem
Conventional attachment assemblies for class dividers in aircraft cabins are time-consuming to install, require special tools and loose hardware that can become lost and cause damage, and do not allow for easy reconfiguration of seating sections, while also needing to withstand high loads and allow for vertical movement of the aircraft ceiling relative to the floor.
Innovation Solution
A self-contained attachment assembly using telescoping structural pins that can be extended and locked without special tools, allowing for secure mounting to aircraft structures without loose hardware, facilitating rapid installation and reconfiguration, and accommodating vertical movement during flight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional attachment assemblies with loose hardware and fasteners are used, then the class divider can be securely mounted to withstand high loads, but the installation process becomes time-consuming and requires special tools
Solution Approach 1:
The attachment assembly merges the mounting bracket, fasteners, and locking mechanisms into a single integrated unit that pre-assembles all components before installation. This eliminates the need for separate fastening operations and special tools during installation, while maintaining the structural integrity needed to withstand 9 G's forward and aft loads.
Solution Approach 2:
The attachment assembly is pre-assembled and pre-configured with all necessary fasteners and locking mechanisms before installation. The bracket is pre-attached to the class divider, and all fastening components are pre-positioned, allowing for rapid installation without requiring time-consuming assembly steps or special tools at the installation site.
2Strength
If conventional attachment assemblies with loose hardware are used, then the class divider can be securely mounted, but the hardware and tools may become lost and cause damage to the aircraft
Solution Approach 1:
All fastening hardware is integrated into the attachment assembly as a single unit, eliminating loose nuts, bolts, and washers that could become foreign object debris. The unified design ensures all components remain accounted for during installation and are securely stored within the assembly structure.
Solution Approach 2:
The design converts the potential harm of loose hardware into a benefit by incorporating all fastening elements into a contained, self-contained assembly. This prevents FOD while maintaining secure mounting capability, and the integrated design actually improves reliability by ensuring all components are properly stored and tracked.
3Strength
If conventional attachment assemblies are used, then the class divider can be mounted to withstand high loads, but the installation process requires special tools and torque verification
Solution Approach 1:
The attachment assembly combines all mounting functions into a single integrated unit that requires only simple installation steps. The unified design eliminates the need for torque verification and special tools, while the internal structure maintains the capability to withstand 9 G's forward and aft loads through its engineered construction.
Solution Approach 2:
The attachment assembly is designed to be self-contained and self-explanatory, requiring no special tools or torque verification procedures. The integrated design includes all necessary components and mechanisms that automatically ensure proper installation without requiring external verification or specialized equipment.
4Strength
If conventional attachment assemblies are used, then the class divider can be securely mounted, but the process requires torque verification and stripe marking
Solution Approach 1:
The attachment assembly merges all mounting and verification functions into a single integrated process. The unified design eliminates separate torque verification and stripe marking steps, while maintaining secure mounting capability through its engineered construction that withstands 9 G's forward and aft loads.
Solution Approach 2:
The attachment assembly is designed to be self-verifying through its integrated construction. The unified design inherently ensures proper installation without requiring external torque verification or visual marking, eliminating these time-consuming steps while maintaining mounting security.
5Strength
If conventional attachment assemblies with multiple fasteners are used, then the class divider can be securely mounted, but the hardware may loosen over time
Solution Approach 1:
The attachment assembly merges multiple fastening mechanisms into a unified integrated design that prevents individual fasteners from loosening. The combined structure distributes loads across the integrated assembly, maintaining mounting security while preventing the progressive loosening that can occur with multiple separate fasteners.
Solution Approach 2:
The design converts the potential problem of loose fasteners into a benefit by integrating all fastening elements into a unified assembly that prevents individual component loosening. The integrated structure actually improves long-term reliability by ensuring all fastening elements move and load together as a single unit.
Data Source
AI summary
An attachment assembly for securing a secondary door to a mating structure may include a door frame and at least one telescoping structural pin disposable within a side of the door frame. The structural pin may be extendable from a retracted position to a deployed position into the mating structure.