Vehicle Seat Support Rail and Roller Layout for Stable Swinging
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Solution Overview
Problem
Existing seat support devices experience instability due to point contact between the base member and rollers, leading to wear and potential deviation in the swinging motion of the seat, resulting in unstable swinging.
Innovation Solution
A seat support device design featuring a base member and swinging members with rail portions supported by rollers, where the rollers are strategically positioned to provide stable swinging in multiple directions, with motors and gear mechanisms for controlled movement, reducing wear and deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If point contact between base member and balls is used, then device complexity is reduced, but reliability deteriorates due to wear and instability
Solution Approach 1:
The patent transitions from point contact (zero-dimensional) to line contact (one-dimensional) by replacing balls with rollers. The rollers contact the rail portions along their length, creating a line contact interface that distributes loads and reduces wear while maintaining structural simplicity.
Solution Approach 2:
The patent uses cylindrical rollers instead of spherical balls, changing the contact geometry from point to line. The curved surface of the rollers enables rolling motion while the line contact with the rail portions provides greater stability and reduced wear compared to point contact.
2Reliability
If multiple rollers are used to support rail portions, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple rollers into integrated assemblies where rollers are mounted on common axles or support structures. The first and second rollers work together as a coordinated system to support the rail portions, reducing the number of independent components while maintaining stability.
Solution Approach 2:
The rollers serve multiple functions: they support the weight of the seat, enable swinging motion, reduce friction through rolling contact, and maintain positional accuracy. This multi-functionality justifies the added complexity by consolidating several requirements into a single component system.
3Reliability
If rollers are positioned to sandwich rail portions, then reliability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The support structure is divided into modular segments with rollers positioned at specific locations along the rail portions. This segmentation allows for standardized manufacturing of individual components that can be assembled in a systematic manner, reducing overall assembly complexity despite the sandwich configuration.
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 design ensures stable and controlled swinging of the seat by distributing the load across multiple rollers, reducing wear and maintaining positional accuracy, thereby enhancing the stability and reliability of the seat support system.
Implementation Method 1
one of the base member and the first swinging member rotatably supports a plurality of first rollers that swingably supports the two first rail portions in the first direction
Implementation Method 2
the first rollers respectively support a lower portion, an upper portion, and a side portion of each of the two first rail portions
Data Source
AI summary
A base member, a first swinging member, and a second swinging member to which a seat of the vehicle is fixed. One of the base member and the first swinging member includes two first rail portions extending in a first direction, and the other of the base member and the first swinging member rotatably supports a plurality of first rollers, and one of the first swinging member and second swinging member includes two second rail portions extending in a second direction, and the other of the 1 and second swinging members rotatably supports a plurality of second rollers. The first rollers respectively support a lower portion, an upper portion, and a side portion of each of the two first rail portions, and the second rollers respectively support a lower portion, an upper portion, and a side portion of each of the two second rail portions.