Vehicle Body Hexagonal Lattice for Torsional Rigidity
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Solution Overview
Problem
Subcompact micro mobility vehicles face challenges in ensuring torsional and collision rigidity due to their compact design and mass production requirements, which are not met by conventional vehicle body structures, leading to insufficient shock absorption and internal space constraints.
Innovation Solution
A vehicle body structure featuring a polygonal lateral unit connected by cross members forming a closed ring-shaped structure, enhancing torsional and collision rigidity through a hexagonal configuration that disperses shock effectively and supports the vehicle's overall rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional two-row seat type configuration is used, then the vehicle body structure is simplified, but the torsional rigidity and collision rigidity are insufficient
Solution Approach 1:
The vehicle body is divided into modular components including a reinforced frame, lateral units, and cross members that connect opposite sides. This segmentation allows each component to be optimized for specific structural functions while maintaining overall rigidity through their interconnected arrangement.
Solution Approach 2:
The patent introduces a three-dimensional lattice structure with cross members extending in the width direction to connect lateral units. This adds a spatial dimension to the structural framework, creating multiple load paths and significantly enhancing torsional rigidity beyond conventional planar configurations.
2Length of moving object
If the micro mobility is designed with a short front overhang, then the vehicle size is reduced, but the front shock absorption space becomes small
Solution Approach 1:
The foremost cross member is positioned in front of the front wheel suspension mounting portion, creating a preliminary structural barrier that begins shock absorption before the main collision force reaches the passenger compartment. This advance positioning allows the reinforced frame to engage earlier in the collision sequence.
Solution Approach 2:
The patent employs a three-dimensional lattice structure with cross members extending in multiple directions, creating volumetric shock absorption zones rather than relying solely on linear crumple zones. This spatial distribution of structural elements enables effective shock absorption within a compact front overhang.
3Volume of moving object
If a one-row seat type configuration is used, then the vehicle size is reduced, but the loop stiffness decreases
Solution Approach 1:
The patent merges the reinforced frame with lateral units that form closed ring-shaped structures. This integration creates continuous load paths around the passenger compartment, maintaining high loop stiffness despite the compact one-row configuration. The cross members further connect opposite lateral units to reinforce this closed-loop structure.
Data Source
AI summary
A vehicle body includes a plurality of lateral units and a cross unit having a plurality of cross members for connecting the lateral units, where neighboring cross members form a closed structure together with members of the lateral units disposed at opposite sides. The vehicle body entirely surrounds the closed structure.