Vehicle Frame Structure with Segmented Bead Portions
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Solution Overview
Problem
Current vehicle front side frame structures face challenges in absorbing collision energy effectively, leading to buckling deformation and increased weight, which affects fuel economy and safety.
Innovation Solution
A frame structure with a closed cross section, a reinforcing member, and bead portions formed from ridgelines that project inwardly, where the reinforcing member is joined to the front and rear proximal portions of the ridgelines, enhancing yield strength against bending deformation without lengthening the side frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the side frame is lengthened to improve collision energy absorption, then energy absorbing performance is improved, but vehicle weight increases
Solution Approach 1:
The side frame is divided into multiple ridgelines (first, second, third ridgelines) that create distinct bead portions. These segmented ridgelines allow localized deformation zones that improve energy absorption without requiring an overall increase in frame length. Each ridgeline acts as an independent energy dissipation element.
Solution Approach 2:
The invention introduces a vertical dimension to energy absorption by creating ridgelines that extend in the vehicle height direction. The bead portions formed by these ridgelines deform vertically during collision, adding a third dimension to the energy absorption mechanism beyond the traditional longitudinal deformation, thereby improving performance without lengthening the frame.
2Reliability
If the side frame is lengthened to improve collision energy absorption, then energy absorbing performance is improved, but fuel economy deteriorates
Solution Approach 1:
The side frame structure is segmented into multiple ridgelines that create discrete bead portions. This segmentation allows the frame to absorb collision energy through localized deformation of individual bead portions rather than requiring a longer overall frame structure, thereby maintaining fuel economy while improving safety performance.
Solution Approach 2:
The invention changes the structural parameters of the side frame by introducing ridgelines with specific configurations (first, second, third ridgelines forming bead portions). These parameter changes enable enhanced energy absorption capacity within the existing frame length, avoiding the need for weight increases that would impact fuel economy.
3Reliability
If the reinforcing member is joined to the ridgeline to reduce stress, then collision energy absorbing performance is improved, but device complexity increases
Solution Approach 1:
The reinforcing member is merged with the ridgeline structure by joining them at specific locations. This combination allows the reinforcing member to directly support the ridgelines during deformation, reducing compressive and tensile stresses on the bead portions. The merging of these components creates a integrated structure that improves energy absorption without requiring separate, complex reinforcement systems.
Solution Approach 2:
The reinforcing member acts as an intermediary element between the bead portions and the rest of the side frame structure. By joining the reinforcing member to the ridgelines, it mediates the stress distribution during collision, protecting the bead portions from excessive compressive and tensile loads while maintaining overall structural integrity.
Data Source
AI summary
Provided is a frame structure of a vehicle comprising a front side frame; a reinforcing member disposed in a closed cross section; and an inner bead portion which is formed from a plurality of ridgelines extending vertically on a side wall of the front side frame and projects inwardly into the closed cross section, in which the side wall has the front inclined planar portion which includes a line connecting the upper end portion of the intermediate ridgeline with the middle portion of the front ridgeline; and the rear inclined planar portion which includes a line connecting the upper end portion of the intermediate ridgeline with the middle portion of the rear ridgeline, and the reinforcing member is joined to the front proximal portion and the rear proximal portion of the intermediate ridgeline, which are the front and rear inclined planar portions.