Vehicle Body Pillar Gusset Bead Closed Cross-Section
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Solution Overview
Problem
Existing vehicle body structures face challenges in enhancing the assembling workability of pillar garnishes while ensuring the rigidity and strength of the structure, particularly due to interference issues with roof side rails during assembly.
Innovation Solution
A vehicle body structure design featuring a pillar with a protruding bead and a gusset with a corresponding bead, forming a closed cross-section that allows smooth engagement of the pillar garnish, eliminating the need for openings in the roof side rail and enhancing load transfer through continuous ridgelines, thereby improving assembly workability and structural rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an opening portion is provided in the roof side rail to prevent engagement portion interference, then assembling workability of the pillar garnish is improved, but rigidity and strength of the opposing section deteriorate
Solution Approach 1:
The invention moves the engagement space creation from the roof side rail (horizontal dimension) to the gusset structure (vertical/different spatial dimension). By forming a closed cross-sectional portion with the engagement portion that extends in the vehicle width direction, the engagement space is created through dimensional repositioning rather than cutting an opening in the roof side rail, thus avoiding strength deterioration while maintaining assembly workability.
Solution Approach 2:
The invention introduces the gusset as an intermediary structure between the roof side rail and the pillar garnish engagement portion. The gusset forms a closed cross-sectional portion that provides the necessary engagement space, acting as a mediator that enables pillar garnish assembly without requiring modifications to the roof side rail structure, thereby preserving the rail's structural integrity.
2Strength
If no opening portion is provided in the roof side rail to ensure rigidity and strength, then structural integrity is maintained, but assembling workability of the pillar garnish deteriorates due to engagement portion interference
Solution Approach 1:
The invention segments the engagement function from the roof side rail to the gusset structure. The gusset is divided into a closed cross-sectional portion that specifically provides the engagement space for the pillar garnish, while the roof side rail maintains its continuous structure for strength. This segmentation allows the engagement function to be fulfilled without compromising the structural integrity of the roof side rail.
Solution Approach 2:
The invention creates a closed cross-sectional portion in the gusset that replicates the engagement space function previously attempted in the roof side rail. This copied functional element (engagement space) is positioned in the gusset rather than the roof side rail, allowing the pillar garnish to be assembled without interfering with the structurally critical roof side rail section.
Data Source
AI summary
A vehicle body structure is configured in such a manner that a left center pillar is covered with a left pillar garnish and a left gusset is joined to the upper end of the left center pillar. The left center pillar is provided with a pillar bead protruding toward the outside of a vehicle compartment. The left gusset is provided with a gusset bead that protrudes toward the vehicle compartment along the pillar bead. The gusset bead and the pillar bead form a first closed cross-section. An engagement section that is insertable into a first opening of the first closed cross-section is provided at the upper end of the left pillar garnish.