Adjustable Rim Radial Tension for Non-Pneumatic Tire Load Capacity
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Solution Overview
Problem
Non-pneumatic tires face limitations in load carrying capacity and durability due to the characteristics of polymeric spokes, which restrict their performance compared to pneumatic tires.
Innovation Solution
An adjustable rim system with annular rings and arcuate members that allow for adjustable radial tension on the spoke structure, enabling enhanced load distribution and durability by interacting with the spoke structure through radially extending slots and arcuate slots to alter the tension dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polymeric spokes are used in non-pneumatic tires, then the tire structure is simplified and manufacturing is easier, but the load carrying capacity and durability are limited
Solution Approach 1:
The patent implements adjustable radial tension mechanisms that allow the spoke structure to dynamically adapt to different load conditions. The tensioning system enables the spokes to be pre-tensioned to optimal levels, transforming them from static polymeric elements to dynamically adjustable load-bearing components that can withstand higher forces without permanent deformation.
Solution Approach 2:
The invention changes the physical parameters of the spoke system by introducing adjustable tensioning mechanisms. By modifying the radial tension parameter of the spokes, the system achieves enhanced load carrying capacity while maintaining the simplified polymeric structure. This parameter adjustment allows the same spoke material to perform under higher stress conditions.
2Ease of manufacture
If polymeric spokes are used in non-pneumatic tires, then the tire structure is simplified and manufacturing is easier, but the durability is limited
Solution Approach 1:
The adjustable tensioning system allows the spoke structure to adapt dynamically to operational stresses. By maintaining optimal pre-tension, the spokes resist fatigue and deformation over time, significantly improving durability. The system can be re-tensioned as needed to compensate for any relaxation or wear.
Solution Approach 2:
The patent applies preliminary tensioning to the spokes during assembly, pre-loading them to optimal stress levels before service. This preliminary action ensures the spokes are ready to handle operational loads from the start, preventing premature fatigue and extending the service life of the tire structure.
3Device complexity
If fixed tension spoke structure is used, then the device complexity is reduced, but the adaptability to different load conditions is limited
Solution Approach 1:
The invention introduces adjustable tensioning mechanisms that allow the spoke structure to adapt to varying load conditions. The system can be manually or automatically adjusted to optimize performance for different vehicle loads, speeds, and operational requirements, transforming a static structure into a dynamically adaptable one.
Solution Approach 2:
The adjustable tensioning system provides multi-functionality to the spoke structure. The same spoke assembly can serve different vehicle types and load requirements by simply adjusting the tension parameter, eliminating the need for multiple specialized spoke designs and enhancing the versatility of the non-pneumatic tire system.
Data Source
AI summary
An adjustable rim includes a first annular ring rotatable about a first axis, the first ring having radially extending first linear slots circumferentially spaced about the first ring, a first annular adjustment hoop rotatable about the first axis, the first hoop having circumferentially and radially extending first arcuate slots spaced about the first hoop, a second annular ring rotatable about a second axis, the second ring having radially extending second linear slots circumferentially spaced about the second ring, a second annular adjustment hoop rotatable about the second axis, the second hoop having circumferentially and radially extending second arcuate slots spaced about the second hoop, and an axially extending arcuate member having a first axial end and a second axial end. The first axial end is circumferentially and radially aligned with a first linear slot of the first annular ring and a first arcuate slot of the first annular hoop. The first linear slot and the first arcuate slot interact to move part of the arcuate member in only a radial direction.