Utility Vehicle Tire Tread Structure for Large Stone Ejection

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Solution Overview

Problem

Existing utility vehicle tires with stone ejectors are not effective in reliably ejecting large stones, leading to jamming and damage to the channel walls and stone ejectors.

Innovation Solution

The design features stone ejectors with convexly curved wall sections and sloping top surfaces, increasing stability and reducing jamming risks, and includes base elevations shaped as diamonds or hemi-ellipsoids with dome-like upper parts, enhancing the stone-ejecting effect and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If base elevations with flat top surfaces are used as stone ejectors, then the structure is simple to manufacture, but the stability is insufficient and large stones jam in the channels

Engineering Contradiction:

Improvestone ejection effectivenessVSAvoidbase elevation structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies curvature by replacing flat top surfaces with sloping surfaces that converge toward a central axis, creating a dome-like or hemi-ellipsoid shape. This curved geometry increases stability by distributing stone impact forces more effectively across the base elevation structure, preventing jamming while maintaining manufacturability through mold-based formation.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The patent changes geometric parameters of the base elevations by introducing slope angles and curved profiles instead of flat surfaces. The sloping top surfaces create a convergence toward the center, transforming the geometric parameters to enhance stability and stone ejection capability without significantly complicating the manufacturing process.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If base elevations are positioned close to channel walls to increase stability, then structural support improves, but stones can still penetrate and cause damage

Engineering Contradiction:

Improvechannel wall protectionVSAvoidstone penetration damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies beforehand cushioning by positioning base elevations close to channel walls to provide preemptive support and protection. The sloping top surfaces further cushion stone impacts by distributing forces, preventing stones from penetrating the channel walls while maintaining the protective function before damage can occur.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If base elevations have uniform width to simplify manufacturing, then production is easier, but stability against stone impacts is reduced

Engineering Contradiction:

Improvebase elevation stabilityVSAvoidbase elevation fabrication

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the width parameter of base elevations by introducing a convergence toward the center through sloping surfaces. The width decreases from the base toward the top, creating a tapered or dome-like shape that enhances stability against stone impacts while remaining manufacturable through standard molding techniques.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11945262B2Utility vehicle tyres

Publication Date: 2024.04.02 CONTINENTAL REIFEN DEUTSCHLAND GMBH

AI summary

The invention relates to a utility vehicle tire tyre having a tread with at least one circumferential channel (2, 2′, 2″) with a channel base (5) and channel walls (4, 4′).Base elevations are formed on the channel base. A top surface (8, 8′, 8″) of the base elevations (7, 7′, 7″) slopes downward uniformly toward the surface edge, wherein the channel walls (4, 4′) have, to the side of the base elevations (7, 7′, 7″), wall sections (4b, 4′b) which are convexly curved toward one another.