Studdable Tire Pin Layout for Icy Braking Traction
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Solution Overview
Problem
Typical studded tires exhibit insufficient force for clawing the road surface during braking, leading to degraded braking performance on icy and snowy surfaces.
Innovation Solution
A studdable tire design with stud pin installation holes arranged in a specific pattern, where the average interval between pin arrangement lines in the center region is 102 to 120% of that in the shoulder regions, and intervals are configured to maximize clawing force by distributing ice and snow accumulation and shaving effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stud pins are arranged in typical studded tire patterns, then the tire provides basic traction on icy and snowy surfaces, but the clawing force during braking is insufficient, degrading braking performance
Solution Approach 1:
The patent applies local quality by differentiating the stud pin arrangement in the center region from the shoulder regions. The center region, which corresponds to the braking area, has a larger average interval between pin arrangement lines (102-120% of shoulder regions) to prevent ice/snow accumulation that reduces clawing force. This localized optimization ensures that the braking region maintains effective clawing force while other regions provide general traction.
2Force
If stud pins are densely arranged to increase clawing force, then braking force improves, but ice and snow accumulation between pins reduces the effectiveness of subsequent pins
Solution Approach 1:
The patent changes the spatial parameter of pin arrangement by controlling the average interval between pin arrangement lines in the center region to be 102-120% of that in shoulder regions. This parameter optimization ensures sufficient spacing to prevent ice/snow accumulation from blocking subsequent pins, while maintaining enough density to provide adequate clawing force for braking performance.
Data Source
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AI summary
A ground contact region of the tread portion of a studdable tire includes a center region located over a range corresponding to lengths of 5 to 25% of a ground contact width on both sides in a tire width direction from a tire centerline; and two shoulder regions located on both sides of the center region in the tire width direction. In each of the center region and the shoulder regions, a plurality of the stud pin installation holes are disposed along each of four or more pin arrangement lines extending in a tire circumferential direction. An average value of adjacent intervals between the pin arrangement lines in the center region is larger than an average value of adjacent intervals between the pin arrangement lines in each of the shoulder regions.