Vehicle Body Closed-Section Pillar-Roof Structure for Rigidity
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Solution Overview
Problem
Conventional vehicle body structures with disconnected A pillars and roof side members compromise body rigidity, ceiling rigidity, and durability, making it difficult to maintain occupant space during collisions or rollovers.
Innovation Solution
The vehicle body is designed with a base frame that integrates the front, rear, and lower portions, and a tubular part with a closed section is coupled to an open flange in the base part, ensuring continuous extension from the pillar to the roof side surface without disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the upper body component uses openings and open sections to connect members, then the number of components for assembly is reduced, but body rigidity and ceiling rigidity cannot be secured
Solution Approach 1:
The patent merges the A pillar and roof side member into a single integrated upper body component with continuous closed sections, eliminating the need for separate connecting members and open sections. This integration maintains high body rigidity while reducing assembly complexity by minimizing the number of components that need to be connected.
Solution Approach 2:
The upper body component is segmented into functional regions (A pillar portion, roof side member portion, etc.) within a single continuous structure. This allows the component to be manufactured as one piece with internal reinforcement structures that provide rigidity without requiring multiple separate parts and connections.
2Ease of manufacture
If the upper body component uses openings and open sections, then manufacturing is simplified, but durability performance deteriorates
Solution Approach 1:
By combining the A pillar and roof side member into a single molded component, the patent eliminates the need for complex assembly operations while maintaining durability. The continuous closed-section structure provides inherent strength and rigidity that open sections cannot achieve, ensuring long-term reliability without sacrificing manufacturing simplicity.
Solution Approach 2:
The upper body component utilizes composite material construction with reinforced structures in critical areas. This allows the single-piece component to achieve high durability and rigidity comparable to multi-component assemblies, while the integrated structure eliminates weak points at connection joints that would compromise long-term durability.
3Ease of operation
If disconnected structure of connecting members is used, then assembly flexibility is improved, but strength to maintain occupant space during collision or rollover deteriorates
Solution Approach 1:
The patent merges multiple connecting members into a single integrated upper body component that provides both assembly flexibility and collision strength. The continuous closed-section structure creates a rigid framework that maintains occupant space during collisions and rollovers, while the integrated design allows for simplified assembly operations compared to connecting multiple separate members.
Data Source
AI summary
A body for a vehicle includes a base part extending in a longitudinal direction of the vehicle and including a flange portion being open outward of the vehicle, a tubular part accommodated on and coupled to the flange portion of the base part and shaped in a pipe with a closed section, and an external garnish coupled to the base part or the tubular part to cover an external portion of the tubular part.