Variable Density Dilatant Layer for Vibration Suppression Tire
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Solution Overview
Problem
Conventional tire vibration absorption methods using thin laminated structures face manufacturing challenges and adverse effects on tire dynamics due to uniform reaction speed in dilatant layers, leading to over-damping and obstructed smooth deformation.
Innovation Solution
A laminated tire absorber structure with a variable density dilatant layer, where particle density distribution decreases from the center to the surfaces, allowing for non-uniform reaction speeds and enhanced vibration absorption without harming tire dynamics, and optionally incorporating elastic binder layers for protection and improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a thin laminated structure (less than 2mm) is used to reduce tire weight and improve vibration absorption, then weight reduction and vibration absorption are improved, but manufacturing difficulty increases significantly due to the challenge of bonding very thin laminate sheets evenly and flat
Solution Approach 1:
The patent changes the material parameters by using a dilatant composition with specific particle size (0.1-10μm) and concentration (30-70 wt%) ranges, along with specific viscosity characteristics, to enable thin sheets to be manufactured and bonded without requiring excessively complex manufacturing processes. This resolves the contradiction by finding optimal parameter ranges that allow thin structure fabrication.
Solution Approach 2:
The patent creates a composite dilatant material combining inorganic particles (alumina, silica, titania) with organic binder (polymer, rubber), where the composite structure provides both the necessary mechanical properties for thin sheet handling and the vibration absorption characteristics. This composite approach enables thin sheet manufacturing while maintaining performance.
2Device complexity
If a single uniform dilatant layer is used to simplify structure, then device complexity is reduced, but adverse effects on tire dynamics occur due to uniform reaction speed causing over-damping and obstructing smooth deformation
Solution Approach 1:
The patent applies local quality by creating density variations within the dilatant layer, where particle concentration differs between the central portion and surface portions. This non-uniform density distribution causes different reaction speeds at different locations, preventing over-damping while maintaining structural simplicity. The central portion has different properties than the surface portions, optimizing both dynamics and vibration absorption.
3Object-affected harmful factors
If a thicker laminated structure is used to improve vibration absorption, then vibration absorption is improved, but weight increases and manufacturing difficulty increases
Solution Approach 1:
The patent changes the functional parameters of the dilatant material by optimizing particle size (0.1-10μm), concentration (30-70 wt%), and viscosity characteristics to maximize vibration absorption efficiency per unit thickness. This allows achieving effective vibration absorption with thinner sheets, thereby reducing weight while maintaining or improving vibration suppression performance.
Solution Approach 2:
The patent uses local quality with density variations in the dilatant layer to enhance vibration absorption efficiency. The non-uniform density distribution creates optimal energy dissipation characteristics that allow thinner structures to achieve the same or better vibration absorption performance compared to uniform thicker structures.
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 solution effectively reduces tire vibration while maintaining smooth deformation and dynamic performance, using a thinner, lighter structure that can be manufactured simply and at a lower cost, with enhanced vibration absorption and reduced noise.
Implementation Method 1
a layer where the arrangement of particles and its binder acts as a dilatant
Data Source
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AI summary
The present invention provides a vibration absorbed tire which has a laminated structure that contains dilantant layer (0310) having the feature of causing reaction rate differences in the cross-sectional direction and thus functions without impairing the motion characteristics of the tire even with only a single or a few very thin layers, whereby the tire is easy to manufacture and has reduced cost. The tire has the laminated structure, which includes the dilantant layer (0310) which is a layer where particles and a bonding material thereof are arranged to act as dilantant, and in which the particles are arranged so that the distribution density of the particles falls toward the upper and the lower surface from the central part of the layer.