Vehicle Exterior Panel Reinforcement for Dent and Surface Control
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Solution Overview
Problem
Existing exterior panel structures for vehicles face challenges in maintaining evenness and preventing dents during washing or waxing, as reinforcing members fail to adhere uniformly to complex-shaped panels, leading to uneven surfaces and potential dents.
Innovation Solution
An exterior panel structure featuring a reinforcing member with multiple joint sections and a coupling section that separates from the panel surface at low pressures but abuts it at higher pressures, dispersing loads and maintaining rigidity, and is designed to minimize dent formation and vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the exterior panel material is thinned to reduce vehicle weight, then weight reduction is achieved, but the exterior panel material becomes susceptible to dents during washing or waxing
Solution Approach 1:
The invention uses a composite structure combining a thin exterior panel material with a foam material layer and reinforcing members. This composite construction maintains the weight advantage of thin materials while adding protective layers that prevent dents during washing or waxing operations.
Solution Approach 2:
The reinforcing member is divided into multiple joint sections coupled by coupling sections, creating a segmented structure that can flexibly adapt to the panel's complex shape while providing distributed reinforcement against denting forces.
2Strength
If reinforcing members are joined to the entire inner surface of the exterior panel material, then dent prevention is improved, but the outer surface of the exterior panel material becomes uneven due to distortion
Solution Approach 1:
The reinforcing member is segmented into multiple joint sections that are spaced apart and coupled by coupling sections. This segmentation allows the reinforcing member to provide dent prevention at key locations without continuously adhering to the panel, thereby avoiding the distortion and surface unevenness that would result from full-surface joining.
Solution Approach 2:
Instead of uniformly joining the reinforcing member across the entire panel surface, the invention applies reinforcement locally at specific joint sections. This localized approach provides sufficient dent prevention while minimizing interference with the panel's outer surface quality and aerodynamic characteristics.
3Shape
If the exterior panel material is configured to have a complex shape for aerodynamic characteristics and external appearance, then aerodynamic performance and appearance quality are improved, but it becomes difficult for reinforcing members to adhere tightly and uniformly to the inner surface
Solution Approach 1:
The reinforcing member is divided into multiple joint sections connected by coupling sections, allowing each segment to independently adapt to the complex inner surface geometry. This segmentation enables effective adhesion at discrete locations without requiring uniform contact across the entire complex surface.
Solution Approach 2:
The coupling sections are configured to be flexible or elastically deformable, enabling the reinforcing member to dynamically adapt its shape to match the complex inner surface of the exterior panel. This dynamic adaptability ensures proper positioning and effective reinforcement without compromising the panel's aerodynamic shape.
Data Source
AI summary
An exterior panel structure for a vehicle prevents unevenness caused by distortion of an outer surface of the exterior panel and keeps dents small even when a user presses the exterior panel from the outside. The exterior panel structure includes the exterior panel, and a reinforcing member having joint sections and coupling sections. The joint sections are separated from each other along an inner surface of the exterior panel, and each is joined to the inner surface of the exterior panel. The coupling section follows the inner surface of the exterior panel and couples the adjacent joint sections. The inner surface of the exterior panel and the coupling section abut each other when a pressing force equal to or larger than a specified value is applied inward in a thickness direction of the exterior panel from an outer surface of the exterior panel, and are otherwise separated from each other.