Motor Vehicle Wheel Spoke Through-Hole Heat Dissipation
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Solution Overview
Problem
Existing wheel designs with through-holes extending over the entire length of spokes compromise mechanical stability and strength, particularly at radially outer sections, and fail to effectively manage heat dissipation without risking tire material and bead seating airtightness.
Innovation Solution
A wheel design with through-holes in spokes, where the radially outer edge of the through-hole is limited to 75% of the rim's outer radius, and branched spokes with strategically placed through-holes to enhance mechanical strength and heat dissipation, while maintaining structural integrity and preventing overheating of tire materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If through-holes extend over the entire length of spokes, then heat dissipation is improved, but mechanical stability and strength are compromised
Solution Approach 1:
The through-holes are segmented into multiple sections along the spoke length rather than forming a single continuous hole. The first through-hole section extends from the hub end toward the rim but stops before reaching it, while the second through-hole section extends from the rim end toward the hub but stops before reaching it. This segmentation maintains structural integrity at critical regions while still providing heat dissipation pathways.
Solution Approach 2:
Different sections of the spoke are treated differently regarding hole placement. The radially inner sections of the spokes are strong enough to allow through-holes, while the radially outer end sections are kept thinner and without through-holes to maintain mechanical strength where it is most needed for load-bearing.
2Temperature
If through-holes are placed in radially outer sections of spokes, then heat dissipation surface area is increased, but structural strength is compromised
Solution Approach 1:
The patent applies different structural characteristics to different regions of the spoke. The radially outer end sections are designed to be thinner and are explicitly excluded from containing through-holes, while the radially inner sections are designed to be stronger and can accommodate through-holes. This local differentiation optimizes both heat dissipation and structural strength in their respective regions.
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 solution provides enhanced mechanical stability and effective heat dissipation, protecting tire materials and bead seating from overheating by controlling heat flow and increasing the contact surface for heat exchange, without compromising the structural strength of the spokes.
Implementation Method 1
the at least one through hole, on the one hand, provides a resistance to the heat flow from the hub to the rim
Implementation Method 2
provides an enlarged contact surface for heat exchange between the wheel, in particular the spokes, and the ambient air
Implementation Method 3
provides an enlarged contact surface for heat exchange between the wheel, in particular the spokes, and the ambient air
Data Source
AI summary
A wheel for a motor vehicle comprises a rim having an outer radius and a wheel spider including a radially inner hub and a plurality of spokes extending from said hub towards said rim. At least one through-hole extends, with respect to the wheel axis, in a circumferential direction through at least one of said spokes. A radially outer edge of said through-hole or of an outermost of said through-holes is located at maximum at 75%, preferably at maximum at ⅔, of said outer radius of the rim measured at a wheel spider side of the rim.