Aircraft Wing Edge Attachment with Adjustable Bush for Tolerance Build-Up
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Aircraft assembly is hindered by tolerance build-up, leading to increased costs and delays, as existing systems require modification of individual components to meet aerodynamic requirements.
Innovation Solution
An adjustable fixed structure attachment system for aircraft wings, comprising a bracket with a slot and bush configuration that allows for height-wise movement to accommodate tolerance variations, along with a retainer and sleeve mechanism to prevent rotation and secure the bush, enabling flexible connection of leading or trailing edge structures to the wing box.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If individual aircraft components are specifically modified to manage tolerance build up, then manufacturing precision is improved, but device complexity and production costs increase
Solution Approach 1:
The attachment system incorporates a movable bush within a slot that allows dynamic adjustment of the trailing edge position. The bush can move along the slot to accommodate tolerance variations, eliminating the need for precise pre-modification of individual components while maintaining assembly precision.
Solution Approach 2:
The system changes the positional parameter of the trailing edge by allowing the bush to move within the slot. This movement adjusts the distance between the wall of the bracket and the pin axis, accommodating tolerance build-up without requiring component modification.
2Reliability
If individual aircraft components are specifically modified to meet aerodynamic requirements, then aerodynamic performance is improved, but production time and assembly rate decrease
Solution Approach 1:
The bracket with slot and movable bush provides a universal attachment mechanism that can accommodate multiple trailing edge positions and configurations. This single design serves multiple functions: maintaining aerodynamic requirements while enabling rapid assembly without individual component modification.
Solution Approach 2:
The movable bush allows the attachment system to dynamically adjust to different trailing edge positions, maintaining aerodynamic performance across various configurations while enabling faster assembly through a standardized, non-modification approach.
3Stability of the object's composition
If fixed position attachment is used, then structural stability is improved, but adaptability to tolerance variations decreases
Solution Approach 1:
The bush moves within the slot to dynamically accommodate tolerance variations while maintaining a stable, fixed attachment when positioned. The pin passes through the bush, slot, and trailing edge to secure the position, combining stability with adaptability.
Solution Approach 2:
The attachment system separates the fixed bracket structure from the adjustable bush component. The bracket provides stable mounting to the wing box, while the bush provides adaptive positioning within the slot, allowing tolerance accommodation without compromising overall stability.
Data Source
AI summary
An adjustable fixed structure attachment system 200 for an aircraft wing, the attachment system 200 including a bracket 210 having: a wall 212 for connection to a wing box, a protrusion 214 protruding from the wall 212, and a slot 216 extending through the protrusion 214, wherein the slot 216 has a height and a width, and a bush 220 having a bore 222 extending therethrough for receipt of a pin, wherein the bush 222 is insertable into the slot 216 and dimensioned relative to the slot 216 so that the bush 220 is substantially immovable in a width-wise direction of the slot 216, and is moveable in a height-wise direction of the slot 216 to thereby vary a position of the bush 220 within the slot 216.