Rear Side Frame Partition Structure for Side-Collision Load Transfer
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Solution Overview
Problem
The increased weight of vehicles due to large batteries has led to higher loads during side collisions, causing deformation of the rear side frame and potential entry into the vehicle interior, which conventional structures struggle to prevent effectively.
Innovation Solution
A rear part structure for a vehicle body incorporating a rear side frame, wheelhouse, and partition member, where the partition member extends from the wheelhouse to the rear side frame, enhancing load transmission and rigidity to suppress deformation during side collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the vehicle is equipped with large batteries to increase power, then the power of the vehicle is improved, but the weight of the vehicle increases leading to higher collision loads that cause rear side frame deformation
Solution Approach 1:
The rear side frame is divided into multiple sections with partition members creating distinct load-bearing zones. The partition members segment the frame structure into front, middle, and rear sections, allowing localized reinforcement without increasing overall vehicle weight, thus maintaining power-to-weight ratio while improving collision resistance
Solution Approach 2:
The rear side frame employs composite construction combining different materials with optimized properties. The frame uses high-strength steel sections combined with aluminum alloy components, creating a composite structure that provides superior strength-to-weight ratio, enabling the vehicle to maintain power while resisting deformation under increased collision loads
2Device complexity
If conventional load transmission member configuration is used, then the structure is simple, but the rear side frame deforms under excessive collision loads from side impacts
Solution Approach 1:
The partition members extend in the vehicle width direction, adding a dimensional element to the load transmission path. This creates a three-dimensional load distribution network within the rear side frame, transforming the conventional linear load path into a multi-directional reinforcement structure that effectively resists side collision forces
Solution Approach 2:
The partition members act as intermediary elements between the outer wall and the inner wall of the rear side frame. These intermediaries transfer and distribute collision loads across multiple points, preventing direct transmission of excessive forces to critical frame sections, thus improving reliability without significantly increasing structural complexity
Data Source
AI summary
A rear part structure of a vehicle body includes: a rear side frame, extending in a front-rear direction of the vehicle body on an outside of a floor of a rear part of the vehicle body in a vehicle width direction; and a wheelhouse, arranged outside the rear side frame in the vehicle width direction. At least a portion of an outer wall of the rear side frame in the vehicle width direction is formed by the wheelhouse. A partition member provided within a section of the rear side frame has one end in the vehicle width direction joined to the outer wall formed by the wheelhouse, extends from the outer wall to a front side of the vehicle body and inward in the vehicle width direction, and has the other end in the vehicle width direction joined to an inner wall of the rear side frame.