Vehicle Seat Underframe With Side-Mounted Spindle Height Adjuster
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Solution Overview
Problem
Existing underframes for vehicle seats are highly complex and costly due to numerous adjustment options, leading to high material and production costs, while manufacturers seek cost-effective, lightweight, and simple seats that maintain basic adjustability.
Innovation Solution
A simplified underframe design for a height adjuster with a base frame, seat frame, and a spindle drive unit having pivotable bearing points, allowing for a reduced number of components and a compact, robust structure, with the spindle drive unit arranged on the side surface of the frame part to save construction space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple adjustment options are provided in the underframe, then adaptability is improved, but device complexity increases
Solution Approach 1:
The rocker unit serves multiple functions: it acts as both a structural support element and a height adjustment mechanism. The single rocker arm provides both longitudinal positioning and height adjustment through its pivoting motion, eliminating the need for separate adjustment mechanisms and reducing overall device complexity while maintaining multiple adjustment capabilities
2Adaptability or versatility
If multiple adjustment options are provided in the underframe, then adaptability is improved, but manufacturing cost increases
Solution Approach 1:
The invention merges the height adjustment mechanism and longitudinal positioning into a single integrated rocker unit. By combining these functions into one structural element rather than using separate mechanisms, the number of parts is reduced, assembly steps are minimized, and manufacturing cost is lowered while still providing multiple adjustment options
3Volume of moving object
If the spindle drive unit is arranged on the side surface of the frame part, then construction space is saved, but device complexity increases
Solution Approach 1:
The spindle drive unit is arranged along the longitudinal extension of the frame part rather than being distributed in three-dimensional space. This linear arrangement along one dimension simplifies the spatial configuration, reduces the volume occupied, and makes the overall structure more compact while maintaining functional integrity
Data Source
AI summary
An underframe for a height adjuster of a seat, in particular a vehicle seat, may have a base frame which is connectable to a vehicle floor, a seat frame which is adjustable relative to the base frame and has at least one frame part, and a spindle drive unit for adjusting the seat frame relative to the base frame. The spindle drive unit has a first bearing point, which is connected pivotably to the frame part, and a second bearing point, which is connected pivotably to the base frame. A height adjuster for the vehicle seat is also provided.