Alternating Side Block Traction for Pneumatic Tire Sidewalls
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Solution Overview
Problem
Conventional pneumatic tires lack effective traction on side portions, particularly due to insufficient design in regions where blocks project outward in the tire width direction.
Innovation Solution
A pneumatic tire design featuring alternately arranged first and second side blocks, with specific projection and recess patterns in the tire radial direction, creating multiple regions where one block projects more than the other, forming edges that enhance traction, and including an auxiliary portion and stepped edge on the second side block for improved traction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional side block designs are used, then manufacturing is simple, but traction on side portions is insufficient
Solution Approach 1:
The side portion is segmented into multiple blocks (first side blocks and second side blocks) with different projection characteristics. Each block type creates edges in specific radial regions, dividing the traction function across multiple segmented elements rather than relying on a single continuous structure.
Solution Approach 2:
Different regions of the side portion are given different local qualities through the alternating block arrangements. First side blocks have recessed portions creating edges in certain radial regions, while second side blocks project more in other radial regions, optimizing traction locally across the entire side portion.
2Reliability
If alternating first and second side blocks are formed with multiple projection regions, then traction is effectively acquired, but the structure becomes more complex
Solution Approach 1:
The first and second side blocks are designed with asymmetric projection characteristics relative to each other. In first radial regions, second side blocks project more than first side blocks, while in second radial regions, first side blocks project more than second side blocks, creating alternating asymmetric patterns that generate multiple edge structures for reliable traction.
3Reliability
If second side blocks include auxiliary portions with stepped portions, then traction is enhanced, but manufacturing complexity increases
Solution Approach 1:
The second side block is segmented into a main body and an auxiliary portion, with the auxiliary portion extending in the radial direction and featuring stepped portions. This segmentation creates additional edges and traction surfaces without requiring entirely separate components, balancing manufacturing feasibility with enhanced traction performance.
Data Source
AI summary
A pneumatic tire includes first and second side blocks formed respectively on a side portion such that the first and second side blocks extend toward the inside in a tire radial direction from a tread shoulder portion. The first and second side blocks are arranged alternately in a tire circumferential direction. The first side block has a recessed portion formed so as to be indented with respect to a side surface. In a first region, the second side block projects outwardly in a tire width direction more than the first side block. In a second region disposed inner side than the first region, the first side block projects outwardly in the tire width direction more than the second side block. In a third region disposed inner side than the second region, the second side block projects outwardly in the tire width direction more than the first side block.