Motorcycle Tire Block Groove Mud Discharge Design
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Solution Overview
Problem
Motorcycle tires for rough terrain experience mud clogging in block grooves, leading to decreased grip performance during continuous travel.
Innovation Solution
The tire features a block pattern with grooved blocks having a pair of first groove portions extending from the edge of the ground contact surface and a second groove portion connecting them, where the second groove has a greater width or depth than the first groove portions, allowing for effective mud discharge and maintaining high grip performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a U-shaped block groove is provided in the block to improve grip performance through edge effect, then grip performance is improved, but mud clogging occurs in the block groove during continuous traveling on uneven ground
Solution Approach 1:
The block groove is segmented into a pair of first groove portions and a second groove portion connecting them. This segmentation creates multiple discharge paths for mud, preventing clogging while maintaining the edge effect for grip performance. The first groove portions extend from the edge of the ground contact surface, and the second groove portion connects them, forming a structured drainage system within the block.
Solution Approach 2:
Different portions of the block groove have different dimensions optimized for their specific functions. The first groove portions have smaller widths optimized for edge effect and grip, while the second groove portion has a larger width specifically designed for mud discharge. This local differentiation allows each section to perform its intended function effectively without compromising the overall block performance.
2Ease of manufacture
If the block groove is designed with uniform width to maintain structural simplicity, then manufacturing is easier, but mud discharge efficiency is reduced
Solution Approach 1:
The block groove transitions from uniform width to variable width, with the second groove portion having a larger width than the first groove portions. This local variation in dimension is specifically targeted at the portion responsible for mud discharge, while the first groove portions maintain smaller widths for structural integrity and edge effect. The selective dimensional variation optimizes mud discharge efficiency without unnecessarily complicating the overall groove structure.
Solution Approach 2:
The groove width variation is introduced as an additional design dimension to solve the mud discharge problem. By varying the width in the横向 dimension rather than changing groove depth or length, the design achieves improved mud discharge efficiency while maintaining relatively simple manufacturing processes. The width variation is implemented only where needed in the second groove portion.
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 design effectively suppresses mud clogging and maintains stable grip performance even on changing road surfaces by allowing the inner portion of the grooved blocks to deflect and discharge mud, ensuring excellent traction and steering stability.
Implementation Method 1
the inner portion of the grooved blocks surrounded by the block groove is more likely to be deflected along the length direction of the first groove portion. Owing to such a deflection of the inner portion, mud clogged into first groove portion and the second groove portion can be effectively discharged.
Data Source
AI summary
The purpose of the present invention is to provide a motorcycle tire for uneven ground travel for which the sticking of dirt to block grooves can be effectively prevented. Provided is a motorcycle tire for uneven ground travel in which a tread portion has a block pattern in which a plurality of blocks are provided. The blocks include, at the tread surface, at least one grooved block which has a block groove which is substantially C-shaped in plan view. The block groove has a pair of first groove portions that mutually extend in the same direction from the edge of the tread surface, and a second groove portion that links the first groove portions. The groove width W2 of the second groove portion is larger than the groove width W1 of the first groove portions, or the groove depth d2 of the second groove portion is larger than the groove depth d1 of the first groove portions.