Rear Seat Track Fitting With Anti-Rattle Shear Body
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Solution Overview
Problem
Existing seat mounting assemblies for passenger vehicles, particularly those with thin tracks, face difficulties in achieving a stable connection due to the weakness in the attachment between the track fitting assemblies and the tracks, leading to potential seat rattle and displacement.
Innovation Solution
A track fitting assembly that includes a track fitting main body and an anti-rattle shear body, featuring a biasing mechanism and a plunger to securely engage the track, with multiple studs and a protuberance for enhanced stability, allowing for improved attachment to the track and reduced rattle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard threaded fasteners or wedge-type elements are used to create a snug fit between the studs and the track lips, then seat rattle is prevented, but the connection stability is compromised when attaching to thick tracks
Solution Approach 1:
The track fitting assembly is divided into two main segments: a track fitting body and a separate anti-rattle shear body. This segmentation allows each component to perform its specific function independently, with the shear body providing adaptability to different track thicknesses while the main body maintains structural integrity.
Solution Approach 2:
The anti-rattle shear body is designed to be movable relative to the track fitting body, allowing it to dynamically adjust its position based on track thickness. This dynamic adjustment enables the fitting to accommodate varying track dimensions while maintaining secure engagement through the plunger mechanism.
2Reliability
If the track fitting assembly is designed to securely attach to thin tracks, then connection stability is improved, but difficulty arises when attaching to thick tracks
Solution Approach 1:
The anti-rattle shear body acts as an intermediary element between the track fitting body and the track. It mediates the connection by adapting to different track thicknesses through its movable design and plunger mechanism, making attachment to both thin and thick tracks feasible without compromising stability.
Solution Approach 2:
The design allows for parameter changes in the engagement depth and orientation through the movable anti-rattle shear body. By adjusting the position and angle of the shear body relative to the main body, the fitting can accommodate varying track thicknesses and maintain optimal engagement parameters for stable attachment.
3Reliability
If multiple studs are used to enhance connection stability, then seat displacement is prevented, but device complexity increases
Solution Approach 1:
The multiple-stud configuration is integrated into the segmented design where studs are positioned on both the track fitting body and the anti-rattle shear body. This segmentation allows the studs to work in coordination across different components, enhancing connection stability while distributing the structural complexity across modular elements.
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
The solution provides a stable and secure attachment of the passenger seat to the track, minimizing rattle and displacement, and enhancing the overall connection stability by utilizing a biasing mechanism and a plunger to engage the track effectively.
Implementation Method 1
a biasing mechanism between the track fitting main body and the anti-rattle shear body. The biasing mechanism may bias the anti-rattle shear body away from the track fitting main body
Data Source
AI summary
Described are track fitting assemblies for passenger seats. Each track fitting assembly includes a track fitting main body and an anti-rattle shear body. The track fitting main body is connectable to a leg of the passenger seat and includes a forward end, an aft end, and at least one stud configured to engage a track. The anti-rattle shear body is positionable on the track fitting main body and is movable relative to the track fitting main body. The anti-rattle shear body includes a forward end, an aft end, and a plunger at the forward end and configured to engage the track. The anti-rattle shear body is connected to the track fitting main body such that the plunger of the anti-rattle shear body is forward of the forward end of the track fitting main body.