Pneumatic Tyre Tread Blocks with Oblique Branches and Elevated Supports
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Solution Overview
Problem
Pneumatic tires face challenges in traction on wet and soft ground due to sinking tread patterns, while large grooves improve traction but compromise rolling performance and wear on hard surfaces.
Innovation Solution
The tire features a tread section with obliquely positioned tread blocks, supported by auxiliary grooves, which alternate between two rows, creating smaller surface areas for increased friction and reduced deformation, enhancing traction without compromising rolling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the tread pattern has large grooves or sparsely placed patterns to prevent sinking in soft ground, then traction capacity is improved, but rolling properties deteriorate and wear-out failure risk increases on hard ground
Solution Approach 1:
The tread pattern is segmented into multiple small tread blocks arranged in rows, separated by grooves. This segmentation creates numerous small contact areas that prevent sinking in soft ground while maintaining structural integrity for good rolling properties on hard surfaces
Solution Approach 2:
The tread blocks are positioned with specific local characteristics - oblique positioning and specific spacing - to optimize performance for different ground conditions. The pattern density and groove depth are locally optimized to balance traction and rolling resistance
2Ease of operation
If the tread blocks are positioned obliquely and supported by auxiliary grooves to reduce deformation, then rolling performance is improved, but manufacturing complexity increases
Solution Approach 1:
The tread is segmented into modular blocks with standardized oblique positioning. The auxiliary grooves are systematically arranged to provide support while maintaining a repeating pattern that simplifies manufacturing despite the complex geometry
Solution Approach 2:
The tread blocks are positioned obliquely at specific angles rather than symmetrically, creating an asymmetric pattern that optimizes rolling performance by reducing deformation. The asymmetric positioning is systematically repeated across the tread surface
Data Source
Figure 1
Figure 2~3
AI summary
A pneumatic tyre whose tread section (10) comprises oblique tread blocks (28). The tread section (10) defines a central line (12), a central zone (14), intermediate zones (20, 22), and edge zones (16, 18) for the tyre. A tread block (28) comprises a first branch (28a) having an end (28b) in the central zone (12) and extending obliquely across the intermediate zone (20, 22) to the edge zone (16, 18), and a second branch (28c) having an end (28d) in the intermediate zone (20, 22) and extending obliquely to the edge zone (16, 18). In the edge zone (16, 18), the first and second branches (28a, 28c) are separated from each other by a first auxiliary groove (32) between them. In the intermediate zone (20, 22), the first and second branches (28a, 28c) are separated from each other by a second auxiliary groove (34) between them. The bottom of the second auxiliary groove (34) is elevated to form a support (36) attached to the first and second branches (28a, 28c) and connecting them to each other.