Off-Road Tire Tread Blocks With V-Cuts for Traction and Rigidity
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Solution Overview
Problem
Pneumatic tires designed for unpaved roads face challenges in maintaining both driving performance and damage-resistance of blocks, as large groove areas compromise block rigidity and damage-resistance.
Innovation Solution
A pneumatic tire design featuring center blocks with V-shaped cuts and specific wall angles, along with shoulder blocks and inclined grooves, that enhance traction and rigidity while effectively gripping and discharging mud and debris.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large groove area is used to improve driving performance on unpaved roads, then traction performance is improved, but block rigidity cannot be secured sufficiently and damage-resistance performance deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the wall surface angles in different regions of the center blocks. The first wall surface has a larger wall surface angle than the second wall surface, creating localized structural characteristics. This allows the groove area to be sufficiently large for traction while specific regions maintain higher rigidity to prevent block damage during unpaved road travel.
2Productivity
If large groove area is used to prevent groove clogging with mud, then driving performance is improved, but block rigidity is compromised
Solution Approach 1:
The patent implements local quality through differentiated wall surface angles where the first wall surface has a larger angle than the second wall surface. This creates regions of varying rigidity within the blocks, allowing the overall groove area to remain large for preventing mud clogging while specific wall regions maintain sufficient rigidity to preserve block structural stability.
3Productivity
If V-shaped cut is provided in center blocks to grip mud effectively, then traction performance is improved, but block rigidity may be reduced
Solution Approach 1:
The patent resolves this contradiction by applying local quality through differentiated wall surface angles in the V-shaped cut. The first wall surface has a larger wall surface angle than the second wall surface, creating localized rigidity in critical regions while maintaining the V-shaped configuration for effective mud gripping. This ensures both traction performance and block rigidity are achieved simultaneously.
Data Source
AI summary
Provided is a pneumatic tire. Center blocks provided in a center region of a tread portion are arrayed and form pairs across inclined grooves that are inclined with respect to a tire circumferential direction. Each one of the center blocks extends across a tire equator from one side to the other side of the tire equator. Each one of the center block includes a cut formed of a first wall and a second wall connected in a V-shape in a tread surface. The first wall extends at an angle within ±20° with respect to the tire circumferential direction in the tread surface, and the second wall extends at an angle within ±10° with respect to a tire lateral direction. Each one of wall surface angles of the first wall and the second wall is larger than a wall surface angle of a wall surface provided with the cut.