Vehicle Front Side Frame Structure for Offset Collision Load Transfer
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Solution Overview
Problem
Existing vehicle-body front structures for electric vehicles are inadequate in absorbing impact loads during offset collisions, as the inclined pipe frames fail to effectively distribute the load to the side frames.
Innovation Solution
A vehicle-body front structure with a battery casing housing a traveling motor, featuring front-side battery frames, impact absorption members, and protruded members that absorb and distribute impact loads through rotational behavior and axial compression of the front side frames, supported by frame brackets and reinforcement members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the left pipe frame and right pipe frame are inclined to be positioned on vehicle-width-direction outer sides toward the front side, then impact load can be absorbed in offset collision, but the impact load cannot be absorbed when collision occurs to the vehicle-width-direction outer side of front portions of the pipe frames
Solution Approach 1:
The front frame structure is segmented into multiple functional components: the inclined pipe frames (11, 12) for standard offset collisions, and the protruded members (15A, 15B) extending from the front side frames (11, 12) to the vehicle-width-direction outer sides. This segmentation allows each component to handle specific collision scenarios, with the protruded members specifically addressing collisions to the outer sides that the inclined pipe frames cannot handle alone.
Solution Approach 2:
The protruded members (15A, 15B) act as intermediary elements that bridge the gap between the front side frames and the vehicle-width-direction outer sides. When collision occurs to the outer sides, these protruded members serve as the primary contact points and load transmission paths, mediating the force transfer to the front side frames for absorption.
2Stability of the object's composition
If the front side frames extend toward vehicle front to be positioned on vehicle-width-direction outer sides, then the distance between frames increases for structural stability, but the frame complexity increases
Solution Approach 1:
The front side frames (11, 12) are designed with multi-functionality, serving both as structural support elements that maintain vehicle stability through their inclined configuration and as load-bearing components for collision absorption. The protruded members integrated with these frames further enhance their functionality by providing additional collision protection without requiring separate independent structures.
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 configuration enables effective absorption of impact loads during offset collisions by transmitting the load to the side frames via protruded members, preventing collapse and ensuring efficient energy absorption across the vehicle-width-direction.
Implementation Method 1
the impact absorption member is compressed and deformed
Implementation Method 2
the left front side frame is axially compressed, and the impact load is thereby absorbed
Data Source
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AI summary
[Problem] An impact load is enabled to be absorbed by a side frame even in a case where an offset collision occurs to a vehicle-width-direction outer side of a front portion of the side frame. [Means for Solution] A vehicle-body front structure A includes a front-side battery frame 32 which is provided in a front portion of the battery casing 10, a pair of left and right side frames 11 and 12 which extend from the front-side battery frame 32 toward vehicle front to be positioned on vehicle-width-direction outer sides toward front, a pair of left and right impact absorption members 16 and 17 which are provided in front of the side frames 11 and 12, a front member 18 which is suspended between the left and right impact absorption members 16 and 17, and protruded members 15A and 15B which are arranged between the side frames 11 and 12 and the impact absorption members 16 and 17 and are protruded to the vehicle-width-direction outer sides of front portions of the side frames 11 and 12.