Vehicle Seat Riser Monolithic Extrusion Load Distribution
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Solution Overview
Problem
Existing vehicle seat risers do not efficiently distribute loads during collisions and occupy significant floor space, lacking structural integrity and manufacturing advantages.
Innovation Solution
A riser system comprising a first leg, a second leg, a first arm, and a third arm, made from materials with significant yield and tensile strength, such as aluminum alloy, which connects the seat to the vehicle frame through a track system, allowing for forward/aft adjustment and distributing loads effectively while minimizing floor space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional multi-part riser construction is used, then assembly flexibility is improved, but structural integrity and manufacturing efficiency deteriorate
Solution Approach 1:
The patent combines multiple riser components (legs, arms, crossbars) into a single integrated riser structure formed from one extruded piece of material. This merging eliminates the need for separate parts and fasteners, thereby maintaining structural integrity while simplifying assembly to a single attachment operation at the seat frame interface.
Solution Approach 2:
The single-piece riser structure performs multiple functions simultaneously: it provides structural support, distributes collision loads across its integrated geometry, and enables assembly flexibility through its monolithic design that eliminates weak points at joints. The extruded profile integrates what would traditionally require multiple separate components.
2Strength
If larger riser structure is used to improve strength, then load distribution is improved, but floor space occupation worsens
Solution Approach 1:
The riser structure features varying cross-sectional properties along its length, with thicker sections strategically positioned at high-stress areas such as the seat attachment interface and leg roots, while maintaining thinner profiles in less critical regions. This local quality optimization provides enhanced load distribution capability without increasing overall floor space occupation.
Solution Approach 2:
The riser utilizes three-dimensional extruded profiles that distribute structural strength across multiple spatial dimensions rather than relying on increased footprint area. The complex cross-sectional geometry provides high moment of inertia and section modulus without requiring larger horizontal dimensions, thereby maintaining compact floor space occupation while achieving superior load distribution.
3Ease of manufacture
If single piece construction is used, then manufacturing efficiency and corrosion resistance are improved, but manufacturing precision requirements worsen
Solution Approach 1:
The patent replaces traditional mechanical assembly processes (cutting, drilling, fastening multiple parts) with a single extrusion forming process. This substitution of manufacturing methodology achieves high manufacturing efficiency and inherent corrosion resistance of continuous material, while the extrusion process itself provides sufficient precision for the structural application without requiring post-manufacturing machining operations.
Data Source
AI summary
A riser for a seat of a vehicle includes a first leg, a second leg, a first arm, a second arm, and a third arm. The first leg includes a first end and a second end. The second leg is substantially parallel to the first leg and has a first end and a second end. The third arm includes a first end and a second end, where the second end of the third arm extends from the first end of the second leg. The first arm extends from the first end of the first leg to the first end of the third arm. The second arm extends from the second end of the first leg to the first end of the third arm.