Motor Vehicle Seat Rail Connecting Element Design
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Solution Overview
Problem
Existing longitudinal adjustment devices for motor vehicle seats lack a stable connection method for functional components, leading to increased pack size and uneven load distribution during normal operation and crashes, which can result in structural failure.
Innovation Solution
A longitudinal adjustment device with a connecting element attached to both the side wall and upper side of the seat rail, allowing for a stable and distributed load introduction, featuring a base body with offset webs and tabs for enhanced stability and a freely selectable connecting section for functional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a swingarm holder is placed on the seat rail for connecting functional components, then the connection of functional components is enabled, but the pack size is increased
Solution Approach 1:
The connecting element is integrated directly into the seat rail structure, merging the connection function with the existing rail components rather than adding separate holders or attachments. This eliminates the need for additional space-consuming external components while maintaining connection capability.
Solution Approach 2:
The seat rail structure is designed to serve multiple functions: it provides longitudinal adjustment, structural support, and direct connection points for functional components through the integrated connecting element. This multi-functionality eliminates the need for separate dedicated connection components.
2Ease of operation
If lateral attachment with recesses is used for connecting functional components, then the connection is simplified, but the load is not distributed over the rails and structural failure risk increases
Solution Approach 1:
The connecting element is designed with differentiated local structures: the first section integrates with the side wall for lateral connection simplicity, while the second section extends to the upper side to provide additional load bearing surfaces. This local differentiation enables both easy connection and proper load distribution.
Solution Approach 2:
The connection structure transitions from a single-plane lateral attachment to a multi-dimensional configuration by extending the connecting element from the side wall to the upper side of the seat rail. This dimensional expansion creates multiple load paths and distributes forces across different spatial orientations.
3Volume of moving object
If the seat rail is used for both longitudinal adjustment and functional component connection, then space optimization is achieved, but the structural integrity may be compromised
Solution Approach 1:
The connecting element is segmented into two distinct sections: the first section integrates with the side wall for compact lateral connection, while the second section extends to the upper side for load distribution. This segmentation allows each portion to optimize for its specific function while maintaining overall structural integrity.
Solution Approach 2:
The connecting element combines different structural features and material configurations to simultaneously achieve compactness and strength. The integration of the first section with the side wall and the extension of the second section to the upper side creates a composite structure that optimizes both space utilization and load-bearing capacity.
Data Source
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AI summary
The invention relates to a longitudinal adjustment device for a motor vehicle seat, with a floor rail which can be connected to a motor vehicle floor, a seat rail which can be connected to the motor vehicle seat and is mounted in a longitudinally displaceable manner on the floor rail, and a connecting element having a connecting section for connection of a functional component to the seat rail. In order to provide a longitudinal adjustment device which permits a stable connection of a functional component, in particular a rocker, it is provided that the connecting element is connected by a first section to a side wall of the seat rail and by a second section to an upper side of the seat rail, wherein the connecting element has an opening for receiving the functional component and/or a bearing element for the arrangement of the functional component, wherein the opening is arranged in the region of a recess running in the region of a bending line between the side wall and the upper side.