Vehicle Lower Structure Impact Absorbing Buffer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle lower portion structures in battery-mounted vehicles, such as electric cars, face challenges in effectively absorbing impact forces during front collisions, potentially leading to deformation of the vehicle cabin and damage to the battery unit due to insufficient impact absorbing performance and separate inertial force absorption requirements.
Innovation Solution
A vehicle lower portion structure featuring a case main body with a front portion extending portion and an impact absorbing portion that extends longitudinally, connected to the front portion, which deforms to absorb collision energy, and is integrated with rockers and suspension lower arms to disperse collision loads and prevent battery damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a frame that is continuous in a single straight line in the vehicle longitudinal direction is formed, then the structural simplicity is improved, but the impact absorbing performance deteriorates
Solution Approach 1:
The frame is divided into multiple segments including a first frame member, a second frame member, and a buffer member positioned between them. This segmentation allows each component to independently absorb impact energy through controlled deformation, thereby improving impact absorbing performance while maintaining structural simplicity.
2Volume of moving object
If the battery is accommodated in a fixed range of the frame from the distal end, then the structural compactness is improved, but the impact absorbing performance deteriorates
Solution Approach 1:
A buffer member is introduced as an intermediary component between the first frame member and the second frame member. This buffer member specifically absorbs impact energy during front collisions, protecting the battery while allowing the battery to be securely positioned in a fixed range within the frame structure.
3Reliability
If the impact absorbing portion is added separately to the suspension member, then the impact absorbing performance is improved, but the device complexity deteriorates
Solution Approach 1:
The impact absorbing function is merged into the frame structure itself by incorporating a buffer member as part of the frame. This integration eliminates the need for separate impact absorbing components on suspension members, thereby improving impact absorbing performance without increasing overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This structure enhances impact absorbing performance during front collisions by distributing collision energy through deformation of the impact absorbing and front portion extending components, reducing the risk of deformation and damage to the battery unit, while simplifying the assembly and structure of the vehicle body.
Implementation Method 1
the impact absorbing portion deforming due to input of collision load from a vehicle front side
Data Source
AI summary
The present disclosure provides a vehicle lower portion structure including: a case main body portion, disposed at a vehicle lower side of a vehicle cabin floor and including a bottom wall and peripheral walls that extend toward a vehicle upper side from a peripheral edge portion of the bottom wall, and accommodating a battery at an interior thereof; a front portion extending portion formed integrally with the case main body portion at a vehicle front side of the case main body portion, at the peripheral wall that is at a vehicle front side of the case main body portion; and an impact absorbing portion, extending in a vehicle longitudinal direction and deforming due to input of collision load from a vehicle front side, a rear end portion of the impact absorbing portion being connected to a vehicle front side region of the front portion extending portion.