Vehicle Wheel Additional Air Chamber Offset Communication Hole
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Solution Overview
Problem
Conventional vehicle wheels face challenges in mass production due to airtightness issues and increased manufacturing costs, and are prone to water entry through communication holes, which affects air column resonance noise reduction and static wheel balance.
Innovation Solution
A vehicle wheel design featuring an additional air chamber member with a communication hole positioned offset from the air valve discharge port, preventing water and tire repairing agents from entering the additional air chamber, while maintaining effective air column resonance sound reduction and static wheel balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a communication hole is formed in the additional air chamber member to communicate between the additional air chamber and tire air chamber, then air column resonance noise reduction is achieved, but water and tire repairing agents can enter the additional air chamber causing volume changes and balance deterioration
Solution Approach 1:
The communication hole is positioned asymmetrically offset from the air valve discharge port in the wheel circumferential direction. This asymmetric positioning ensures that the communication hole does not align with the discharge port, preventing water and tire repairing agents from entering the additional air chamber while maintaining the noise reduction function.
2Reliability
If multiple separators and cap member are accurately joint to the vehicle wheel by welding, bonding, fitting or fastening, then airtightness is secured, but manufacturing workload and cost increase
Solution Approach 1:
The additional air chamber member is designed as a single integrated component that combines the functions of multiple separators and the cap member. This single piece is fitted into the well portion space between the first and second vertical wall surfaces, eliminating the need for multiple separate parts and complex joining processes while maintaining airtightness through the integrated structure.
Solution Approach 2:
The additional air chamber member serves multiple functions simultaneously: it creates the additional air chamber for noise reduction, provides the communication hole for acoustic coupling, and acts as a sealed barrier preventing water entry. This multi-functional design simplifies the overall structure and reduces manufacturing 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 enhances mass productivity, reduces manufacturing costs, and effectively prevents water entry, thereby maintaining the volume of the additional air chamber and reducing air column resonance noise while ensuring static wheel balance.
Implementation Method 1
the communication hole and the additional air chamber constitute a Helmholtz resonator and the air column resonance sound inside the tire air chamber can be reduced by the resonator
Implementation Method 2
The additional air chamber member can be fitted in a space between the first vertical wall surface and the second vertical wall surface only by locking the edge portions to the respective locking portions of the first vertical wall surface and the second vertical wall surface, by utilizing elasticity of the edge portions.
Data Source
AI summary
A vehicle wheel which includes an additional air chamber member forming an additional air chamber in a tire air chamber. The additional air chamber member is fixed on an outer circumferential surface of a well portion of a rim. The additional air chamber member is provided with a communication hole communicating between the additional air chamber and the tire air chamber. The communication hole is disposed at a position shifted from a discharge port of an air valve for supplying air in the tire air chamber in a wheel circumferential direction and opened to the tire air chamber.