Vehicle Wheel Helmholtz Resonator Volume via Separated Joining Member
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Solution Overview
Problem
Conventional vehicle wheels have a limited sub-air chamber volume due to the size constraints imposed by the extending edge portions of the Helmholtz resonator, which restricts the noise canceling performance.
Innovation Solution
A vehicle wheel design featuring a rim with a recessed portion on its outer circumferential surface, where a sub-air chamber member is attached via a joining member, allowing for a larger sub-air chamber volume and improved noise canceling performance without the need for edge portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sub-air chamber member includes edge portions extending outward from the main body, then the attachment structure is improved, but the sub-air chamber volume is reduced
Solution Approach 1:
The invention extracts the attachment function from the main body of the sub-air chamber member by introducing a separate joining member. The edge portions that previously extended from the main body are removed, and instead, a joining member with joining portions is used to attach the sub-air chamber member to the rim. This separation allows the main body to be optimized for volume while the joining member handles the attachment function.
Solution Approach 2:
The joining member serves as an intermediary between the sub-air chamber member and the rim. It includes joining portions that engage with the recessed portion of the rim, providing a reliable attachment mechanism without requiring the sub-air chamber member itself to have extending edge portions. This mediator allows the main body to achieve maximum volume.
2Reliability
If the main body portion is enlarged to increase sub-air chamber volume, then the noise canceling performance is improved, but the attachment structure becomes more complex
Solution Approach 1:
The invention segments the attachment structure into a separate joining member that is distinct from the sub-air chamber member's main body. This segmentation allows the main body to be freely designed for optimal noise canceling performance with maximum volume, while the joining member independently provides the attachment function through its joining portions that fit into the rim's recessed portion.
Solution Approach 2:
The joining member acts as an intermediary that simplifies the overall attachment structure. By providing standardized joining portions that engage with the rim's recessed portion, it creates a straightforward attachment mechanism that does not complicate the main body design, allowing the main body to be optimized purely for noise canceling performance.
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 the sub-air chamber volume and noise canceling capabilities by eliminating the size limitations of the edge portions, providing a more effective noise reduction mechanism.
Implementation Method 1
a Helmholtz resonator (sub-air chamber member) that is attached to the outer circumferential surface and cancels air column resonance noises in a tire air chamber
Data Source
AI summary
A vehicle wheel includes: a rim including a well portion with an outer circumferential surface, the well portion having a recessed portion formed on the outer circumferential surface; a sub-air chamber member serving as a Helmholtz resonator; and a joining member including a joining portion disposed in the recessed portion. The sub-air chamber member is attached to the outer circumferential surface of the well portion via the joining member.