Vehicle Wheel Disk Hat Portion Curved Crest Design
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Solution Overview
Problem
Conventional vehicle wheel disks face challenges in balancing strength, rigidity, and weight, particularly in maintaining structural integrity and design characteristics when vent windows are enlarged without increasing material thickness.
Innovation Solution
The vehicle wheel disk design incorporates a hat portion with a crest portion that can be straight, curved inwardly, outwardly, or a combination of both, connected via spoke and shift portions, which enhances bending rigidity and strength while allowing for larger vent windows without material thickness increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the material thickness is increased to maintain structural integrity, then the bending strength and rigidity are improved, but the weight increases and design characteristics are compromised
Solution Approach 1:
The hat portion is designed with a curved crest portion that extends in the radial direction, creating an arched structural form. This curvature distributes stress more effectively across the disk material, enhancing bending strength and rigidity without requiring increased material thickness, thereby avoiding additional weight while maintaining structural integrity.
Solution Approach 2:
The design transitions from a conventional flat disk structure to a three-dimensional form by adding the hat portion with crest that protrudes axially. This dimensional change creates additional structural depth and leverage, improving bending resistance and rigidity without increasing the radial thickness of the disk, thus avoiding weight penalties.
2Area of stationary object
If the vent window area is enlarged for design characteristics, then the aesthetic appeal is improved, but the structural integrity and bending rigidity deteriorate
Solution Approach 1:
The curved crest portion of the hat structure acts as a reinforcing arch that spans across the vent window openings. This curved geometry provides structural support to the enlarged vent window areas, distributing loads around the openings and preventing excessive deformation, thereby maintaining bending rigidity despite increased vent window area.
Solution Approach 2:
The hat portion with its curved crest is strategically positioned to provide localized reinforcement in areas where stress concentration would occur due to the enlarged vent windows. This local quality enhancement targets specific structural weak points without requiring global thickening of the entire disk, preserving both structural integrity and design characteristics.
3Weight of moving object
If the material thickness is reduced to decrease weight, then the weight is improved, but the bending strength and stress resistance worsen
Solution Approach 1:
The curved crest portion creates an arch effect that inherently resists bending forces more efficiently than flat structures. This geometric reinforcement compensates for reduced material thickness by distributing stresses more effectively through the curved geometry, maintaining stress resistance despite weight reduction.
Solution Approach 2:
The wheel disk employs a composite structure combining the main disk body with the separately formed hat portion that is later joined. This composite construction allows optimization of each component's thickness and material properties, achieving weight reduction while maintaining overall structural strength through the synergistic combination of parts.
Data Source
AI summary
A vehicle wheel disk includes a hat portion having a crest portion extending continuously in a circumferential direction of the disk, an inner curved portion curved inwardly in an axial direction of the disk radially inside the crest portion and extending continuously in a circumferential direction of the disk, and an outer curved portion curved inwardly in the axial direction of the disk radially outside the crest portion and extending in the circumferential direction of the disk.