Pinned Seat Track Stud Assembly for Roll Freedom
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Solution Overview
Problem
Existing seat track fitting assemblies for passenger vehicles transfer excessive preload to seat legs, leading to potential failure in testing or damage to the track, as they do not effectively manage moments during pitch and roll movements.
Innovation Solution
The development of a seat track stud with a first and second stud member, featuring a pin that allows rotational displacement and a flanged base portion with extended portions, which reduces stress on the seat leg by aligning with the seat track's axis, enabling roll freedom and pivotability, and optionally incorporating concave indentions for flexing, to distribute forces more evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If standard threaded fasteners, bolts, or wedge-type elements are used to create a snug fit between the studs and the track lips, then the seat rattle and unintended seat displacement are prevented, but the moments transferred to the seat leg when the seat track is pitched and/or rolled are limited and considerable preload is transferred to the seat leg which may result in failure in testing or damage to the track
Solution Approach 1:
The stud is divided into two separate stud members (first stud member and second stud member) connected by a pin. This segmentation allows each stud member to independently interact with the track lip, distributing the preload and moment loads more effectively while maintaining seat stability.
Solution Approach 2:
A pin is introduced as an intermediary element connecting the first and second stud members. The pin allows relative movement between the stud members, enabling them to accommodate pitch and roll moments while reducing the preload transferred to the seat leg.
2Reliability
If the flared ends of the studs are designed to contact the underside of the slot lips, then the track fitting assembly can be secured to the track, but the preload transferred to the seat leg during pitch and roll movements causes potential failure in testing or damage to the track
Solution Approach 1:
The track fitting assembly is designed to be dynamic rather than rigid. The two stud members can move relative to each other through the pin connection, allowing the assembly to adapt to pitch and roll movements dynamically, thereby reducing harmful preload on the track.
Solution Approach 2:
The design changes the mechanical parameters of the stud by creating a two-member system with a pin connection. This alters the load distribution parameters, reducing the force transmitted to the seat leg while maintaining secure attachment to the track.
3Stability of the object's composition
If a snug fit is created between the studs and track lips using standard fasteners, then seat displacement is prevented, but the moments during pitch and roll testing cause considerable preload that may damage the track
Solution Approach 1:
The single stud is segmented into two stud members connected by a pin. This segmentation allows the system to maintain positional stability while distributing and reducing the stress on the track during pitch and roll movements.
Solution Approach 2:
The pin acts as an intermediary that mediates between the two stud members, allowing controlled movement that reduces stress on the track while maintaining sufficient stability to prevent seat displacement.
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
This design reduces stress on the seat leg and prevents damage to the seat track during testing by allowing roll freedom and pivotability, ensuring secure attachment while minimizing preload transfer.
Implementation Method 1
The pin is friction fit into the first securing portion opening, the connecting portion opening, and the second securing portion opening.
Implementation Method 2
a flanged base portion with extended portions, which reduces stress on the seat leg by aligning with the seat track's axis
Implementation Method 3
optionally incorporating concave indentions for flexing
Data Source
AI summary
Described is a seat track stud for attaching a passenger seat to a seat track having a first stud member, a second stud member, and a pin. The first stud member includes a base portion with at least one flanged edge, a first securing portion extending from the base portion and defining a first securing portion opening; and a second securing portion extending from the base portion at a location opposite the first securing portion and defining a second securing portion opening. The second stud member includes a connecting portion that defines a connecting portion opening and that is sized to fit between the first securing portion and the second securing portion. The pin extends through the first securing portion opening, the connecting portion opening, and the second securing portion opening.