Heavy Load Tyre Tread Blocks with Protrusions for Mud Expulsion
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Solution Overview
Problem
Heavy load vehicle tires face reduced traction due to mud trapping in tread grooves when transitioning from asphalted to off-road surfaces, leading to compromised grip and safety on wet or slippery grounds.
Innovation Solution
A tire tread design featuring broad intersections with stocky-shaped protrusions, providing increased lateral stiffness and a sucking effect to expel trapped mud, while maintaining traction and comfort on various surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If narrow grooves are used in the tread, then comfort and noise level on asphalted ground are improved, but mud trapping occurs reducing traction on off-road paths
Solution Approach 1:
The tread is segmented into blocks separated by grooves, with further segmentation created by transverse grooves that divide blocks into smaller sub-blocks. This multi-level segmentation prevents mud from bridging across the entire groove width, reducing mud trapping while maintaining narrow groove benefits for noise and comfort on asphalted surfaces.
Solution Approach 2:
Different regions of the tread have different groove characteristics. The transverse grooves create local variations in groove depth and width within each block, with deeper grooves at block centers and shallower grooves near block edges. This local quality variation optimizes mud expulsion at specific locations while maintaining overall narrow groove configuration for comfort on paved roads.
2Reliability
If wide grooves are used in the tread, then mud trapping is reduced improving traction on off-road paths, but noise level and vibrations increase on asphalted ground
Solution Approach 1:
Instead of using a single wide groove that causes noise and vibrations, the invention segments the groove into multiple narrower sub-grooves separated by transverse grooves. This segmentation maintains the total groove width needed for mud expulsion while creating multiple small channels that reduce noise and vibrations on asphalted surfaces.
Solution Approach 2:
The invention adds a transverse dimension to the groove structure by introducing grooves that run perpendicular to the main circumferential grooves. This creates a three-dimensional groove network that provides mud expulsion pathways without requiring wide single grooves, thereby reducing noise and vibrations on paved roads while maintaining off-road traction.
3Reliability
If mud is trapped in tread grooves, then grip on rolling surface is reduced, but expelling mud requires broader intersections that may increase noise
Solution Approach 1:
The transverse grooves create local quality variations in the tread structure, with open intersections at specific locations that facilitate mud expulsion. These localized open areas provide sufficient space for mud ejection without requiring broad intersections across the entire tread, thereby maintaining low noise levels on asphalted ground while improving grip by preventing mud accumulation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The tire effectively expels mud, maintaining traction and safety on all surfaces without increasing noise or vibrations, ensuring consistent performance across different terrains.
Implementation Method 1
a stocky-shaped protrusion is arranged, having a lateral stiffness greater than the lateral stiffness of the surrounding blocks
Implementation Method 2
the stocky and rigid protrusion - under the action of the underlying belt structure - gives rise to a thrust in the radial direction on possibly trapped mud, so as to effectively expel the same
Data Source
AI summary
Tyre comprising a tread (2) provided with blocks (201-204) formed among substantially longitudinal (205-207) and transverse grooves, wherein among the blocks particularly broad intersections (212) are formed, for example by staggering substantially transverse grooves of circumferential rows axially in side-by- side relationship, of blocks with rounded corners, and wherein inside such broad intersections (212) a stocky- shaped protrusion (216) is arranged which has a lateral stiffness greater than the lateral stiffness of the surrounding blocks (201-204).