Aircraft Pivot Bin Lift Assist for Lower Closing Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing aircraft storage bin systems require significant hand force to close, and existing solutions like electro-mechanical lift assists are expensive to produce and certify.
Innovation Solution
A mechanical lift assist system that activates a spring-based assist mechanism only when a predetermined load is applied, using a soft stop assembly with a damper and ratcheting mechanism to reduce closing force, and deactivates when the load is removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a mechanical lift assist system is implemented, then the hand force required to close the bin is reduced, but the device complexity increases
Solution Approach 1:
The lift assist system automatically activates and deactivates based on the presence of luggage weight on the bucket, without requiring external control systems. The weight-sensitive trigger mechanism detects when assistance is needed and engages the spring mechanism accordingly, making the system self-regulating and reducing overall complexity.
Solution Approach 2:
A weight-sensitive trigger mechanism serves as an intermediary between the luggage load and the lift assist spring. This trigger automatically engages or disengages the spring mechanism based on whether the luggage weight exceeds the threshold, providing a simple mechanical solution that avoids complex electronics or sensors.
2Force
If electro-mechanical lift assist with sensors and programming is used, then the hand force required to close the bin is reduced, but the manufacturing and certification costs increase
Solution Approach 1:
The patent replaces electro-mechanical systems with a purely mechanical lift assist mechanism. The spring-based system is activated through mechanical means (weight-sensitive trigger) rather than electronic sensors and programming, significantly reducing manufacturing complexity and certification requirements while still providing the necessary force assistance.
Solution Approach 2:
The mechanical components (springs, triggers, latches) are simple, inexpensive parts that can be easily manufactured and replaced if needed. This approach uses basic mechanical elements rather than expensive electro-mechanical assemblies, making the system more cost-effective for production and maintenance.
3Ease of operation
If the lift assist system provides continuous assistance, then the ease of operation is improved, but the energy consumption increases
Solution Approach 1:
The lift assist spring provides assistance periodically rather than continuously - specifically, only when the luggage weight exceeds the predetermined threshold. The weight-sensitive trigger mechanism ensures the spring is engaged only when needed, allowing the system to conserve energy when the bin is empty or lightly loaded while providing assistance when required.
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
Reduces the hand force required to close the storage bin by providing assistance only when needed, based on the weight of luggage, thereby optimizing energy use and cost-effectiveness.
Implementation Method 1
A mechanical lift assist system that activates a spring-based assist mechanism
Implementation Method 2
using a soft stop assembly with a damper
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method of pivoting an aircraft storage bin that includes a bucket that pivots with respect to an upper housing. The method includes pivoting the bucket from a closed position to an intermediate position and placing weight that exceeds a predetermined weight threshold in the bucket, thereby causing the bucket to move to an open position. Movement of the bucket to the open position causes a lift assist unit to activate. A first end of the lift assist unit is connected to the bucket and a second end of the lift assist unit is connected to the upper housing. The method also includes pivoting the bucket from the open position to the closed position. The lift assist unit provides assistance as the bucket is pivoting from the open position to the closed position.