Static Runflat System Rim Stoppers Arrest Movement
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Solution Overview
Problem
Conventional runflat systems experience undesirable relative motion between the wheel and the runflat device due to dimensional tolerances and irregular wheel surfaces, leading to vibrations, reduced traction, and premature failure in under-inflated or deflated conditions.
Innovation Solution
An enhanced static runflat system assembly featuring a wheel rim with a cylindrical section and radial flange, an annular static runflat device with structural provisions, and predefined stoppers on the wheel rim to securely engage and arrest the movement of the runflat system, ensuring proper alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional runflat systems are secured to the wheel rim using cam locks, bolts, or elastic bands, then the runflat device can be attached to support the tire in under-inflated conditions, but dimensional tolerances and irregular wheel surfaces cause relative motion and rotation between the runflat device and wheel rim
Solution Approach 1:
The runflat device incorporates a flexible element that allows dynamic adaptation to dimensional variations in the wheel rim, enabling the device to maintain stable engagement despite manufacturing tolerances and irregular wheel surfaces through controlled flexibility rather than rigid fixation
Solution Approach 2:
The system changes the engagement parameters by using a flexible connection mechanism that can accommodate variations in position and orientation, allowing the runflat device to maintain effective engagement with the wheel rim across a range of dimensional tolerances without relative motion
2Stability of the object's composition
If the runflat system is tightly locked to the rim using elastic bands or locking cams, then initial stability is achieved, but the visco elastic materials creep over time under constant stress causing the system to loosen and rotate
Solution Approach 1:
The invention extracts the problematic visco elastic locking materials from the system and replaces them with a mechanical flexible element that does not rely on material creep resistance, eliminating the time-dependent loosening issue while maintaining initial stability
Solution Approach 2:
The flexible element is designed to maintain its engagement characteristics over time without degradation from stress creep, providing self-sustaining stability throughout the service life of the runflat system without requiring maintenance or adjustment of the locking mechanism
3Ease of manufacture
If conventional locking methods are used to secure the runflat device, then the device can be attached to the wheel rim, but relative motion causes vibrations, reduced traction, and premature failure
Solution Approach 1:
The flexible element provides dynamic adaptation to wheel rim variations, maintaining continuous stable contact that eliminates vibrations and ensures consistent traction while keeping the attachment method simple and easy to manufacture
Data Source
AI summary
An enhanced static runflat system is disclosed. According to an exemplary embodiment of the present invention, at least one predefined structural stopper provided on the outer peripheral surface of the cylindrical section of the wheel rim, whereby at least one predefined structural stopper secures, an inner circumference of the annular static runflat to an outer circumference of the wheel for arresting a movement of the static runflat over the wheel rim.