Vehicle Front Body Structure for Impact Absorption
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Solution Overview
Problem
Micro-mobility vehicles with short front overhangs face challenges in securing impact absorption and collision rigidity due to the absence of a sub-frame, as the engine is located at the rear, making it difficult to effectively absorb front collisions and provide sufficient supporting force.
Innovation Solution
A front body structure featuring extended front side members, an upper back beam, front center members, a lower back beam, support members, and cross members that form load paths and reinforce collision rigidity, ensuring effective impact dispersion and protection of occupants, even without a sub-frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the front overhang is shortened to reduce vehicle length, then vehicle compactness is improved, but impact absorption capability deteriorates
Solution Approach 1:
The front body is divided into multiple structural components including front side members, front center members, upper back beams, and lower back beams. Each segment serves specific structural functions to distribute and absorb impact forces effectively within the limited front overhang space.
Solution Approach 2:
The patent introduces vertical layering with upper and lower back beams, transforming a traditionally horizontal structure into a three-dimensional framework. This dimensional change allows for enhanced impact absorption capability without increasing the horizontal length of the front overhang.
2Device complexity
If a sub-frame is omitted to simplify structure, then device complexity is reduced, but collision rigidity deteriorates
Solution Approach 1:
The patent merges the functions of traditional sub-frame components into integrated front body structures. The front side members, front center members, and back beams work together as a unified load-bearing system, eliminating the need for a separate sub-frame while maintaining collision rigidity.
Solution Approach 2:
The front body members are designed to serve multiple functions simultaneously: structural support, impact absorption, and load path distribution. This multi-functionality compensates for the omitted sub-frame, maintaining collision rigidity without adding structural complexity.
3Volume of moving object
If the front overhang is shortened, then space usability is improved, but the space for impact absorption deteriorates
Solution Approach 1:
The front body employs thin-walled structural members with optimized cross-sectional geometries. These members provide sufficient impact absorption capability through their structural design rather than relying on large volumetric space, thus preserving space usability while maintaining safety performance.
Solution Approach 2:
The patent utilizes composite structural designs combining different materials and cross-sectional shapes in the front body members. This allows for high impact absorption efficiency in compact dimensions, achieving both space usability and adequate impact absorption space within the shortened front overhang.
Data Source
AI summary
A front body of a vehicle includes left and right front side members extending forward from a left end part and a right end part of a lower end of a dash panel, an upper back beam connecting front ends of the front side members and extending in a width direction of the vehicle, left and right front center members extending forward from a central left part and a central right part of the lower end of the dash panel, a lower back beam connecting front ends of the front center members and extending in the width direction of the vehicle, and first and second support members, the first support member connecting the left front side member and the left front center member and the second support member connecting the right front side member and the right front center member.