Rough-Terrain Motorcycle Tire Tread for Cornering Response
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Solution Overview
Problem
Existing motorcycle tires for rough terrain lack optimal rolling characteristics, particularly during cornering, with issues in lightness and response when leaned.
Innovation Solution
The tire design includes a tread portion with first blocks featuring a protrusion and angled outer edges, along with a protruding side wall and narrow grooves, which inhibit excessive deformation and enhance moderate contact with the ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional block patterns are used in the tread portion, then the tire can run on rough terrain, but the rolling characteristics (lightness and response during cornering) are insufficient
Solution Approach 1:
The patent applies local quality by creating distinct regions within the block structure. Specifically, the outer edge of the tread surface includes a protrusion that forms a minor angle with the first and second portions, creating a localized geometric feature at the outer edge region. This local structural modification improves rolling characteristics during cornering while preserving the overall block pattern's terrain traction capability.
Solution Approach 2:
The patent incorporates curvature elements through the protrusion design on the outer edge. The protrusion creates a curved or angled transition between the first and second portions of the outer edge, rather than a straight line. This curved geometry helps improve lightness and response during rolling and cornering operations.
2Ease of operation
If the outer edge is designed with a protrusion forming a minor angle, then lightness and response during cornering improve, but the structural complexity of the block increases
Solution Approach 1:
The complexity is localized to only the outer edge region of the block, where the protrusion with minor angle is formed. The rest of the block structure maintains conventional simple geometry. This localized approach improves cornering response without requiring complex structures throughout the entire block.
Solution Approach 2:
The patent applies partial action by modifying only the outer edge portion of the block rather than the entire block structure. The protrusion and minor angle are introduced at the specific location where they provide maximum benefit for cornering response, while minimizing overall structural complexity.
Data Source
AI summary
A motorcycle tire for running on rough terrain includes a tread portion. The tread portion can include a tire equator, a first tread end, and first blocks. Each of the first blocks can include a tread surface and an outer side wall. The tread surface can include an outer edge. The outer edge can include a protrusion, a first portion, and a second portion. The first portion and the second portion can form a minor angle therebetween on the first tread end side.