Tire Rolling Resistance Test Machine Floating Sensing
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Solution Overview
Problem
Existing tire rolling resistance testing machines fail to accurately assess tramping and runout when tires are loaded, as the deformation of the carcass and tread under load conditions are not adequately simulated in horizontal testing, leading to potential defects in tire performance.
Innovation Solution
A tire rolling resistance testing machine with X-axis and Y-axis sensing members, featuring a main testing set with a loading wheel and gliding member, and hydraulic cylinder, which allows for floating connection of sensing members to simulate tire movement and load conditions, enabling precise contact testing and data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If horizontal testing method is used with tire rotating on vertical shaft, then testing structure is simple and easy to operate, but test results only reflect unloaded tire conditions and fail to detect deformation under load
Solution Approach 1:
The testing machine transitions from a static horizontal rotation test to a dynamic vertical rolling test where the tire is driven by a loading wheel and moves through sensing members, simulating actual vehicle loading conditions and enabling detection of deformation under load
Solution Approach 2:
The testing method changes the operational parameters by rotating the loading wheel at controlled speeds (3-6 km/h) and applying vertical load through the loading wheel on the tire tread, transforming the test from idle rotation to loaded rolling conditions
2Device complexity
If fixed mounting of sensing members is used, then device structure is simple, but sensitivity and accuracy of detection are reduced
Solution Approach 1:
The sensing members (dial gauges or sensors) are mounted on sliding blocks that can move vertically along guide rails, allowing the sensing members to dynamically follow the tire's deformation and movement during rolling, thereby maintaining high detection sensitivity without complex fixed mounting structures
Solution Approach 2:
Sliding blocks serve as intermediaries between the fixed mounting structure and the sensing members, enabling the sensing members to move freely in the vertical direction to track tire deformation while maintaining stable electrical and mechanical connections
3Productivity
If tire is tested in idle rotation without load, then testing process is simple and quick, but carcass and tread deformation under load cannot be detected
Solution Approach 1:
The testing system applies controlled vertical load through the loading wheel on the tire tread and rotates the loading wheel at speeds simulating actual vehicle conditions (3-6 km/h), changing the test parameters from idle rotation to loaded rolling to detect carcass and tread deformation
Solution Approach 2:
The loading wheel serves multiple functions: it drives the tire forward during rolling, applies vertical load to simulate vehicle weight, and provides a controlled rolling surface, enabling the system to test multiple tire parameters under realistic loading conditions simultaneously
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
This design enhances the sensitivity and accuracy of tire testing by simulating real-world load conditions, improving the precision and reliability of tramping and runout measurements, thus ensuring better riding comfort and product quality.
Implementation Method 1
a hydraulic cylinder connected to the second frame
Implementation Method 2
The two X-axis positioning plates have a plurality of rollers around the first sleeved aperture, and the rollers make contact with the first connecting member
Data Source
AI summary
A tire rolling resistance testing machine has: a main testing set, an X-axis sensing member and a Y-axis sensing member. The X-axis sensing member and the Y-axis sensing member are configured for testing the tire, wherein the first connecting member and the second connecting member are floatingly mounted between the two X-axis positioning plates and the two Y-axis positioning plates which allow the axial rod to be placed through and perform the test. This design greatly improves the sensitivity of the first connecting member and the second connecting member, and avoids the mutual interference between the X-axis moment and the Y-axis moment when the tire is tested. Therefore, the precision of the test and the accuracy of rolling resistance data is improved.