Vehicle Wheel Sub-Air Chamber with Cone-Shaped Side Plate
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Solution Overview
Problem
Conventional vehicle wheels with sub-air chamber members lack sufficient surface rigidity in their side plates, which limits their noise cancellation performance for air column resonance noise.
Innovation Solution
A vehicle wheel design featuring a sub-air chamber member with a main body including a top plate, bottom plate, and side plates, and a substantially cone-shaped portion formed integrally with the bottom plate and side plates, enhancing the surface rigidity and noise cancellation by stabilizing the sub-air chamber volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tubular portions are formed in the side plates to improve surface rigidity, then noise cancellation performance improves, but manufacturing difficulty increases significantly
Solution Approach 1:
The invention changes the geometric parameter of the side plate from a flat structure to a convex curved structure. This parameter change increases the surface rigidity of the side plate without requiring tubular portions, thereby improving noise cancellation performance while avoiding manufacturing difficulties. The convex curved shape inherently provides structural stiffness to resist volume variations in the sub-air chamber.
2Reliability
If the side plates are made more rigid to reduce volume variation, then noise cancellation performance improves, but structural complexity increases
Solution Approach 1:
The invention modifies the geometric parameter of the side plate by introducing a convex curved shape. This single parameter change simultaneously achieves both goals: it increases surface rigidity to reduce volume variation and maintains structural simplicity by avoiding complex features like tubular portions. The convex curvature provides the necessary stiffness through geometric design rather than structural complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design significantly improves noise cancellation performance by reducing volume variations in the sub-air chamber, as demonstrated by computer-aided engineering simulations, compared to conventional wheels.
Implementation Method 1
a sub-air chamber member attached to the rim and serving as a Helmholtz resonator that cancels air column resonance noise in a tire air chamber
Data Source
AI summary
A vehicle wheel includes a rim and a sub-air chamber member attached to the rim and serving as a Helmholtz resonator that cancels air column resonance noise in a tire air chamber. The sub-air chamber member includes: a main body portion including a top plate, a bottom plate, and a side plate connecting between the top plate and the bottom plate, the main body portion defining an inner space surrounded by the top plate, the bottom plate, and the side plate and serving as a sub-air chamber; and a communication through-hole that allows communication between the tire air chamber and the sub-air chamber. The main body portion further includes a substantially cone-shaped portion formed integrally with the bottom plate and the side plate.