Vehicle Wheel Disc Rigidity via Localized Nut Support Ribs
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Solution Overview
Problem
Existing wheel discs for vehicles equipped with Electronic Stability Control (ESC) require higher rigidity, which is challenging to achieve without increasing manufacturing costs or weight by using high-strength materials or thicker sheets.
Innovation Solution
A vehicle wheel disc design featuring a mounting portion with annular nut support portions that include bulging and protruding portions to enhance rigidity, reducing the likelihood of plastic deformation and buckling under large forces, while maintaining material and thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high-strength material is used to increase wheel disc rigidity, then rigidity is improved, but manufacturing cost increases
Solution Approach 1:
The invention applies local quality by providing reinforcing ribs only at specific locations (nut support portions) where they are most needed to prevent plastic deformation during mounting, rather than uniformly increasing material strength throughout the entire wheel disc. This localized reinforcement achieves the required rigidity while using standard materials, thereby controlling manufacturing costs.
2Strength
If sheet thickness is increased to increase wheel disc rigidity, then rigidity is improved, but weight increases
Solution Approach 1:
The invention uses local quality by adding reinforcing ribs only at the nut support portions where structural reinforcement is critical, rather than increasing the thickness of the entire wheel disc sheet. This selective thickening through rib structures provides necessary rigidity while minimizing overall weight increase.
Solution Approach 2:
The invention transitions from a two-dimensional sheet structure to a three-dimensional structure by adding protruding reinforcing ribs that extend in the axial direction. This dimensional change creates additional structural strength and rigidity without proportionally increasing the material quantity or weight of the wheel disc.
3Ease of manufacture
If conventional wheel disc design is used, then manufacturing cost and weight are controlled, but rigidity is insufficient for ESC-equipped vehicles
Solution Approach 1:
The invention resolves this contradiction by maintaining standard materials and thickness for the base wheel disc structure, thereby controlling manufacturing costs, while adding localized reinforcing ribs at the nut support portions to provide the additional rigidity required for ESC-equipped vehicles. This targeted approach delivers enhanced performance without proportionally increasing cost.
Data Source
AI summary
A mounting portion of a disc includes a flat plate portion having a pressing surface to be pressed against a hub of an axle, and a plurality of nut support portions protruding from the flat plate portion to a side opposite to the pressing surface in an axial direction of the disc, and having an annular shape as viewed from the axial direction. A bolt hole is provided to penetrate the nut support portion in the axial direction. The nut support portion includes a bulging portion curving to bulge outward in a radial direction of the nut support portion, and a protruding portion disposed adjacent to the bulging portion in a circumferential direction of the nut support portion, and protruding inward in the radial direction of the nut support portion with respect to the bulging portion.