Aircraft Stowbin Door Track Hinge Mechanism
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Solution Overview
Problem
Current stowbin door mechanisms in aircraft extend into the passenger compartment when opened, limiting movement and requiring counterbalance and friction for support, which can lead to obstacles and increased risk of failure due to overdesign.
Innovation Solution
A track base door hinge mechanism with multiple guides and tracks that allow the door to move within or above the storage bin, providing four points of support and eliminating the need for counterbalance and friction, while allowing the door to pivot and move efficiently between closed and open positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the door is supported by two hinge points, then the door can be simplified in structure, but the door cannot remain stable in the open position without counterbalance and friction
Solution Approach 1:
The patent transitions from traditional vertical hinge support to a track-based system where the door moves along a curved path in a different dimensional plane. The track guide allows the door to follow a predetermined trajectory that combines vertical and horizontal movement, enabling the door to clear the stowbin interior without requiring complex counterbalance mechanisms.
Solution Approach 2:
The track acts as an intermediary element between the door and the stowbin structure. Instead of direct hinge connection, the door interacts with the track through a guide mechanism, which mediates the movement and provides stability. This intermediary track system distributes forces and enables controlled motion without requiring friction or counterbalance.
2Ease of operation
If the door extends into the passenger compartment when opened, then the door can be easily supported by hinges, but it limits movement and creates obstacles for passengers
Solution Approach 1:
The door opening path is changed from a simple arc into the passenger compartment to a more complex three-dimensional trajectory along the track. The track is positioned above or around the stowbin, guiding the door to move in a path that clears the passenger compartment space while maintaining ease of operation through the guide mechanism.
Solution Approach 2:
Instead of the door swinging outward into the passenger compartment, the track system guides the door to move inward along the stowbin perimeter or above it. This inverted approach reverses the traditional door opening direction, eliminating the harmful effect of blocking passenger movement while maintaining simple operation through the track guide.
3Device complexity
If the door is supported at only two hinge points, then the support structure is simplified, but the hinges must be overdesigned to carry the load
Solution Approach 1:
The support function is segmented from the traditional hinge into separate components: the track structure provides the support path, the guide mechanism provides directional control, and the door follows the predetermined trajectory. This segmentation distributes the load across multiple points along the track rather than concentrating it at two hinge points, reducing the strength requirements for each individual support element.
Solution Approach 2:
The support system transitions from point-based hinge support to a distributed track-based support. The track extends along the door's movement path, providing continuous support rather than discrete hinge points. This dimensional change from points to a linear path distributes the mechanical load along the track length, reducing peak stresses on individual support elements.
Data Source
AI summary
A door mechanism for a compartment on an aircraft that includes a door with a first lower guide, a second lower guide, a first upper guide, and a second upper guide. The door mechanism includes a first lower track, a second lower track, a first upper track, and a second upper track, each having a guide track. The first lower guide, second guide, first upper guide, and second upper guide being configured to travel along the corresponding guide track to enable the door to move between open and closed positions. The door in the open position may be positioned within a portion the compartment or may be positioned above the compartment. The first and second lower tracks may include a first a second gap that enables the door to be selectively uncoupled from the first and second lower track guides permitting the door to swing away from the compartment.