Front Bumper Bracket Structure for Low-Position Collision Loads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle body structures face issues during low-velocity collisions where the colliding body moves below the bumper, leading to increased ingression distance and potential longitudinal bending deformation, especially in vehicles with higher heights like SUVs, and there is a risk of insufficient impact energy absorption during high-velocity collisions.
Innovation Solution
A vehicle body structure with left and right skeletal members and a bumper reinforcement featuring load receiving portions that protrude outward and downward, including first and second receiving portions, which are separate brackets attached to the bumper reinforcement to prevent rotational moments and suppress longitudinal bending deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the entirety of the bumper reinforcement is expanded in width in a downward direction, then the distance of ingression of the colliding body at low position is suppressed, but the weight of the bumper reinforcement is increased and longitudinal bending deformation may occur during high velocity front collision
Solution Approach 1:
The bumper reinforcement is segmented into a main body portion and multiple load receiving portions that protrude downward. This segmentation allows the load receiving portions to specifically counteract low-position collisions without requiring expansion of the entire bumper reinforcement structure, thereby suppressing ingression distance while controlling weight increase.
Solution Approach 2:
The load receiving portions are strategically positioned at specific locations where low-velocity collisions are most likely to occur. By concentrating structural reinforcement only at these critical local areas rather than expanding the entire bumper reinforcement, the design suppresses harmful ingression while minimizing unnecessary weight increase.
2Object-affected harmful factors
If the bumper reinforcement is expanded downward to prevent low position collision, then ingression distance is reduced, but longitudinal bending deformation of skeletal members occurs during high velocity front collision
Solution Approach 1:
The bumper reinforcement is divided into a main body portion and separate load receiving portions. This segmentation ensures that the load receiving portions handle low-velocity collision loads without transmitting excessive longitudinal bending moments to the skeletal members during high-velocity front collisions, thereby preventing both ingression and unwanted deformation.
Solution Approach 2:
The load receiving portions are designed with specific geometric characteristics and positioning that allow them to effectively resist low-position collision forces while their connection to the main body portion filters out excessive longitudinal bending moments during high-velocity impacts, protecting the skeletal members from deformation.
3Object-affected harmful factors
If load receiving portions protrude downward, then low velocity collision resistance is improved, but device complexity increases compared to conventional bumper structures
Solution Approach 1:
The load receiving portions are integrated with the main body portion of the bumper reinforcement to form a unified structure. This merging approach allows the complex functionality of resisting low-position collisions to be achieved without requiring completely separate components, thereby reducing overall device complexity while maintaining improved collision resistance.
Data Source
AI summary
A vehicle front structure is provided including left and right front side members extending in a vehicle front-and-rear direction, and a bumper reinforcement connected to front ends of the front side members, and extending in a vehicle width direction, the vehicle front structure further including first brackets and second brackets attached to the bumper reinforcement and protruding toward a vehicle front side and a vehicle downward side in relation to the bumper reinforcement, and first bumper brackets and second bumper brackets fastened to the bumper reinforcement, and that have tips which are in contact with respective rear ends of the first brackets, and the second brackets.