Tyre Tread Incision Design for Edge Length and Rigidity
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Solution Overview
Problem
Tire treads with incisions face challenges in maintaining rigidity while increasing the length of edges after wear, as existing designs either reduce rigidity or increase tread depth excessively.
Innovation Solution
A tire tread design featuring a plurality of relief elements with incisions, where the incisions are divided into first and second parts, with the second part extending in the thickness of the tread, creating mechanical connections between disjointed relief elements, thereby increasing edge length and maintaining appropriate rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If incisions are provided in the tread to generate edges, then the number of edges increases, but the rigidity of the tread decreases
Solution Approach 1:
The incision is divided into multiple parts (first part, second part, third part) that extend to different depths in the radial direction. This segmentation allows each part to contribute to edge generation while the varying depths maintain structural integrity and rigidity of the tread.
Solution Approach 2:
Different parts of the incision have different depths and configurations tailored to specific functions. The first part extends to a first depth, the second part to a second depth greater than the first, and the third part to a third depth, creating local variations that optimize both edge generation and rigidity maintenance in different regions of the tread.
2Quantity of substance
If incisions are extended deeper into the tread, then more edges are generated, but the rigidity of the tread is substantially reduced
Solution Approach 1:
The incision is divided into multiple parts (first part, second part, third part) that extend to different depths in the radial direction. This segmentation allows each part to contribute to edge generation while the varying depths maintain structural integrity and rigidity of the tread.
Solution Approach 2:
The incision extends in multiple directions including the circumferential direction and the radial direction with varying depths. By utilizing the radial dimension with different depths for different parts, the design maximizes edge length while preserving rigidity through strategic depth variation.
3Length of stationary object
If the incision is subdivided into diverging parts, then the total length of edges increases, but the rigidity of the relief element is substantially reduced
Solution Approach 1:
The incision is divided into multiple parts (first part, second part, third part) that extend to different depths in the radial direction. This segmentation allows each part to contribute to edge generation while the varying depths maintain structural integrity and rigidity of the tread.
Solution Approach 2:
Different parts of the incision have different depths and configurations tailored to specific functions. The first part extends to a first depth, the second part to a second depth greater than the first, and the third part to a third depth, creating local variations that optimize both edge generation and rigidity in different regions.
Data Source
Figure 1~2
Figure 3A~5B
Figure 6~7C
AI summary
A tyre tread comprising a plurality of relief elements (10) delimited by cuts, at least one of these relief elements (10) comprising an incision (2) having a maximum depth (H) at least equal to the thickness of the tread, this incision (2) extending in a main direction determined by the ends of the line of the incision on the rolling surface in the new state and a secondary direction extending in the thickness of the tread, this incision being formed by a first part (21) and a second part (22), the first incision part (21) extending in the secondary direction between the contact surface (15) in the new state and a depth (H1) at least equal to 40% of the maximum depth (H) and the second incision part (22) extending the first part (21) into the thickness of the tread, this second part (22) extending over a depth (H2). This tread is characterized in that the second incision part (22) comprises, in the main direction of the incision, at least one first portion (221) and at least one second portion (222), these two portions each having a length which is less than the length (L), each first portion (221) being formed by an incision comprising at least two branches (51, 52) that are spaced apart from one another by a maximum distance (D1), and each second portion (222), which is located in line with a first portion (221) in the main direction of the incision, being separated from any first portion.