Rear Axle Support Reinforcing Structure for EV Underbody Stiffness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The integration of a high-voltage battery and electric drivetrain into a floor assembly designed for internal combustion engines increases stiffness, deteriorates driving dynamics, and affects vehicle acoustics in electric vehicles.
Innovation Solution
A reinforcing structure for the underbody of a motor vehicle, featuring transverse and longitudinal struts, linkages, and a shear panel, which enhances transverse stiffness and supports the axle support, improving acoustic insulation and driving dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a high-voltage battery and electric drivetrain are integrated into a floor assembly designed for internal combustion engines, then the stiffness between the middle region and rear region of the underbody increases, but the driving dynamics deteriorate and vehicle acoustics are affected
Solution Approach 1:
The reinforcing structure is divided into multiple segments: transverse connecting struts for lateral stability, longitudinal support struts for longitudinal strength, diagonal struts for torsional rigidity, and shear panels for cutting resistance. Each segment addresses specific stiffness requirements while maintaining overall structural balance, preventing the deterioration of driving dynamics despite the increased local stiffness from battery integration.
2Stability of the object's composition
If a high-voltage battery and electric drivetrain are integrated into a floor assembly designed for internal combustion engines, then the stiffness between the middle region and rear region of the underbody increases, but the vehicle acoustics deteriorate
Solution Approach 1:
Different regions of the underbody are reinforced with different structural qualities: transverse connecting struts provide lateral stability in critical areas, while longitudinal and diagonal struts provide strength in load-bearing regions. The shear panel with corrugations provides localized acoustic insulation and structural reinforcement. This differentiated approach allows the structure to achieve necessary stiffness while maintaining acoustic insulation in specific zones.
3Volume of moving object
If a large concavity is provided in the underbody for the electric drivetrain, then installation space is created, but the functioning of the shear panel is adversely affected
Solution Approach 1:
The shear panel is designed with three-dimensional corrugations that provide structural strength in multiple directions. The corrugated structure creates a complex geometry that maintains panel functionality despite the concavity, as the folded structure can accommodate spatial variations while retaining its load-bearing and shear-resisting capabilities.
4Stability of the object's composition
If transverse connecting struts, support struts, and diagonal struts are added to the underbody, then transverse stiffness and acoustic insulation are improved, but the device complexity increases
Solution Approach 1:
Multiple structural functions are merged into an integrated reinforcing structure: transverse connecting struts provide both lateral stability and support for the shear panel, while diagonal struts simultaneously contribute to torsional rigidity and overall structural strength. This merging reduces the number of separate components needed and simplifies the overall structure while achieving the desired transverse stiffness and acoustic insulation.
Data Source
AI summary
A reinforcing structure is provided for an underbody of a motor vehicle. The motor vehicle has an axle support, in particular a rear axle support, wherein the axle support has a first and a second holder, which are spaced apart from one another in the transverse direction of the vehicle. The reinforcing structure has a transverse connecting strut and a first and a second axle support linkage. The transverse connecting strut is connected to both the first and the second axle support linkage, and the first holder of the axle support can be connected to the first axle support linkage and the second holder of the axle support can be connected to the second axle support linkage.