Vehicle Tyre Sidewall Arcuate Elevation Design
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Solution Overview
Problem
Existing vehicle tire surface elements designed like hatching on the side walls experience a weakening contrast and inhomogeneous reflection as the distance from the tire axis increases, leading to visible differences in gray areas, making them less recognizable and harmonious.
Innovation Solution
The surface elements feature arcuate elevations with a decreasing radius of curvature from radially outward to inward, running in a continuous curve along lines of a family of lines with equally spaced concentric circles and radial auxiliary lines, ensuring a uniform reflection across the tire sidewall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If elevations run in arc from radially inside to radially outside with constant curvature, then the hatching design is simple to manufacture, but the reflection becomes inhomogeneous and contrast weakens radially outwards
Solution Approach 1:
The patent applies parameter changes by varying the radius of curvature of the arcuate elevations along their radial course. Specifically, the radius of curvature decreases from radially outside to radially inside, transforming the constant curvature design into a variable curvature design. This parameter modification ensures that the mutual spacing between elevations remains constant, thereby achieving homogeneous reflection and uniform gray areas across the entire sidewall surface.
2Device complexity
If elevations are spaced with increasing distance from radially inside to radially outside, then the hatching follows simple geometric patterns, but the contrast becomes weaker and gray areas become inhomogeneous
Solution Approach 1:
The patent modifies the spacing parameter of the elevations by maintaining a constant mutual distance between adjacent elevations along their entire arcuate course from radially inside to radially outside. This constant spacing, achieved through variable radius of curvature, ensures uniform optical properties and homogeneous gray areas, eliminating the inhomogeneity caused by increasing spacing in conventional designs.
3Ease of manufacture
If elevations run parallel to one another with constant radius of curvature, then the design is simple and easy to produce, but visible differences in gray areas appear across the sidewall
Solution Approach 1:
The patent achieves uniform reflection by changing the radius of curvature parameter along the arcuate path of each elevation. The radius of curvature is designed to decrease from radially outside to radially inside in a controlled manner, ensuring that elevations remain parallel while maintaining constant mutual spacing. This variable curvature design, though more complex than constant curvature, ensures uniform optical appearance and eliminates visible gray area differences.
Data Source
Figure 1~1a
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AI summary
The invention relates to vehicle tyres having two side faces (2) and at least one section-lined surface element (5) on at least one side face (2), which comprises a plurality of adjacent and arc-shaped extending projections (4) which extend from radially inward to radially outward at an increasing acute angle to the radial direction. The projections (4) extend parallel to each other, the radius of curvature of the arc-shaped pass becomes smaller from radially outwards to radially inwards.