Non-Pneumatic Tire Pull Cable Rim Adaptation
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Solution Overview
Problem
Existing non-pneumatic tires are limited to specific wheel rim sizes and widths, making them unsuitable for a broad range of bicycle wheels, which is inconvenient for rental companies that need to regularly maintain tires on variously sized bikes.
Innovation Solution
A non-pneumatic tire with an annular massive tire body made of elastic and resilient material, featuring a longitudinal pull cable channel that allows the tire to be mounted on a variety of wheel rims by adjusting to different diameters and widths through tensioning, ensuring a secure fit and maintaining suspension and driving characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-pneumatic tire is made with a fixed massive structure, then the tire provides reliable suspension and driving characteristics, but the tire can only fit to rims of one specific size and width
Solution Approach 1:
The tire body is designed with elastic and resilient material that can dynamically deform and adapt its shape during mounting and operation. The material properties allow the tire to conform to different rim geometries while maintaining structural integrity and performance characteristics.
Solution Approach 2:
The patent utilizes changes in material parameters (elasticity, resilience) and geometric parameters (cross-sectional shape, thickness distribution) to enable the tire body to adapt to various rim sizes and widths while preserving suspension and driving characteristics.
2Force
If the pull cable channel is positioned closer to the inner circumference, then the cable tensioning is more effective, but the distance becomes too small affecting cable installation and tire performance
Solution Approach 1:
The patent optimizes the positional parameter of the pull cable channel by establishing a specific distance range (7-18 mm) from the inner circumference. This parameter optimization balances the competing requirements of effective cable tensioning and ease of installation while maintaining overall tire performance.
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 provides a universal fit for different rim sizes and shapes, reducing maintenance needs for rental companies and enhancing the usability of bicycles in urban areas by preventing flats and improving shock absorption.
Implementation Method 1
the tire body consists of an elastic and resilient material in order to provide good suspension and driving characteristics
Implementation Method 2
the channel containing a pull cable... equipped for leading through a pull cable intended for tightening the tire body to the rim of a wheel
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
Tire, comprising an annular massive tire body having an essentially round or oval cross section having a centre MB, and having an outer circumference Co forming a tread and an inner circumference Ci facing the centre of the annular body, the body containing a longitudinal pull cable channel, the channel containing a pull cable and having a cross section having a centre MK, wherein the distance between MK and the inner circumference Ci is between 7 and 18 mm measured along a line connecting MK and MB and structure comprising the tire mounted around a wheel rim.