Aircraft Floor Attachment Stud Head for High-Torque Installation
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Solution Overview
Problem
Aircraft monument floor attachment studs require high torque for installation, which often leads to damage or failure due to the use of hex keys, failing to meet aviation standards without compromising functionality.
Innovation Solution
The aircraft monument floor attachment stud features a tool section with a hexagonal cross-section and sloped surfaces transitioning to a body diameter, allowing for improved torque transfer and reduced risk of failure, while maintaining compliance with aviation standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high torque is applied during installation of the attachment stud, then the installation strength is improved, but the stud or tool may damage or fail
Solution Approach 1:
The patent introduces an intermediate head structure with a tool section and body section that acts as a mediator between the installation tool and the stud. The head includes shaped portions with sloped surfaces that distribute torque evenly, preventing stress concentration that would lead to stud or tool damage while still achieving the required installation strength.
2Ease of operation
If hex keys are used to install the attachment stud, then the installation process is simplified, but the hex key or stud may be damaged due to high torque
Solution Approach 1:
The patent segments the attachment stud into distinct functional sections: a tool section for tool engagement, a head with shaped portions for torque distribution, and a threaded body for fastening. This segmentation allows the tool section to receive torque while the shaped portions in the head distribute the stress, preventing damage to both the tool and stud while maintaining ease of operation with standard tools.
3Productivity
If torque is concentrated at a single point during installation, then the installation process is faster, but the stud or aircraft structure may be damaged
Solution Approach 1:
The patent applies local quality by creating varied geometric features at different locations of the head structure. The shaped portions with sloped surfaces are strategically positioned to distribute torque across multiple contact points rather than concentrating it at a single location. This local variation in geometry ensures fast installation while preventing damage to the aircraft structure through even torque distribution.
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
An aircraft monument floor attachment stud may include a body (200) configured to pass through an opening (106) of an aircraft monument (104), and a head (210). The body may include a body diameter. The body may be configured to couple to a fitting (116) inserted into a mount point installed within an aircraft cabin floor. The head may include a tool section (212) with a tool section diameter (214) less than the body diameter. The tool section may be configured to receive a predetermined amount of torque from a tool to secure the aircraft monument to the fitting. The head may include a shaped section (218) with an intermediate diameter (228) greater than the tool section diameter and less than the body diameter. The shaped section may include at least one shaped portion with at least one sloped wall, and may be configured to provide a transition between the tool section diameter and the body diameter.