Vehicle Rear Structure Closed Sectional Part Torsional Stiffness
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Solution Overview
Problem
Existing vehicle rear structures face challenges in enhancing torsional stiffness while minimizing weight increase, and require complex evaluation and quality control for each vehicle type due to design-specific upper back panel configurations.
Innovation Solution
The vehicle rear structure incorporates a closed sectional part composed of two distinct panels with larger thicknesses than the upper back panel, allowing for optimized torsional stiffness without increasing the overall weight, and enabling common design for various vehicle types, thus simplifying quality control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the first closed sectional part is made larger than usual to enhance torsional stiffness, then the torsional stiffness of the vehicle is improved, but the thickness of the overall upper back panel becomes larger and the weight of the vehicle increases
Solution Approach 1:
The patent divides the upper back panel into multiple separate panels (first panel, second panel, third panel, fourth panel) with different thicknesses. The first and second panels have larger thicknesses to provide torsional stiffness, while the third and fourth panels have smaller thicknesses to reduce weight. This segmentation allows different parts of the structure to have optimized thicknesses for their specific functions rather than uniformly increasing the thickness of the entire upper back panel.
2Adaptability or versatility
If the shape of the upper back panel is set in conformity with the design of each type of vehicle, then the design requirements of each vehicle are met, but the need for performing an evaluation test of the torsional stiffness for each type of vehicle makes the quality control complicated
Solution Approach 1:
The patent creates a standardized first closed sectional part that can be universally applied across different vehicle types. By defining specific thickness relationships (first panel and second panel thicker than third and fourth panels) and structural configurations, the same first closed sectional part design can be used for multiple vehicle models, eliminating the need to perform separate torsional stiffness evaluation tests for each vehicle type while still meeting various design requirements.
Data Source
AI summary
A vehicle rear structure has an upper back panel, and a first closed sectional part that is coupled to a front end part of the upper back panel in a vehicle forward-rearward direction and serves as a closed sectional part having a closed section structure. The first closed sectional part is constituted of a first panel and a second panel that are panel members different from the upper back panel. The thickness of the first panel and the thickness of the second panel are larger than the thickness of the upper back panel, respectively.