Vehicle Front Side Frame Protrusions for Offset Collision Load Absorption
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Solution Overview
Problem
Existing vehicle-body front structures in electric vehicles fail to effectively absorb impact loads during offset collisions, particularly on the vehicle-width-direction outer sides of the front portions of the side frames.
Innovation Solution
A vehicle-body front structure for electric vehicles that includes a battery casing with a front-side battery frame, side frames extending outward, impact absorption members, and protruded members to absorb impact loads, along with frame brackets supporting the side frames from the outer sides to prevent collapse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the side frame is positioned on the vehicle-width-direction outer sides toward the front, then the vehicle width is increased and design flexibility is improved, but the impact load cannot be absorbed when offset collision occurs to the outer side of the front portion
Solution Approach 1:
The side frame structure is segmented into multiple functional portions: a front portion that can be elastically deformed during impact, a protruded member that extends outward to receive impact loads, and a rear portion that maintains structural integrity. This segmentation allows the side frame to both extend outward for design flexibility and absorb impact loads through controlled deformation of specific segments.
Solution Approach 2:
The protruded member is positioned beforehand to extend from the front portion of the side frame toward the vehicle-width-direction outer side. This protrusion acts as a preliminary cushioning element that receives impact loads before they reach the main side frame structure, enabling the side frame to absorb impact energy through elastic deformation while maintaining its outward positioning.
2Reliability
If the impact absorption member is provided in front of the side frame, then the impact load absorption is improved, but the device complexity increases
Solution Approach 1:
The impact absorption member is merged with the side frame structure such that the front portion of the side frame itself serves as the impact absorption member. The protruded member, which is part of the side frame, extends outward to receive impact loads and transmit them to the main body through elastic deformation. This integration eliminates the need for separate impact absorption components, reducing device complexity while maintaining impact load absorption capability.
Solution Approach 2:
The side frame structure performs multiple functions: it provides structural support for the vehicle body, positions components in the vehicle-width-direction outer sides, and absorbs impact loads through the elastic deformation of its front portion and protruded member. This multi-functionality eliminates the need for separate dedicated impact absorption members, thereby reducing 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
The structure effectively absorbs impact loads during offset collisions by compressing and deforming components, dispersing the load across multiple parts, and preventing side frame collapse, enhancing overall collision resistance.
Implementation Method 1
the left impact absorption member is compressed and deformed
Implementation Method 2
the left impact absorption member is compressed and deformed
Data Source
AI summary
A vehicle-body front structure includes a front-side battery frame which is provided in a front of the battery casing 10a pair of left and right side frames which extend from the front-side battery frame toward vehicle front to be positioned on vehicle-width-direction outer sides toward front, a pair of left and right impact absorption members in front of the side frames, a front member between the left and right impact absorption members, and left and right projections arranged between the left and right side frames and the left and right impact absorption members and protrude to the vehicle-width-direction outer sides of fronts of the left and right side frames, respectively.