Tire Test Carriage Alignment for Stationary Road Surface Simulation
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Solution Overview
Problem
Conventional tire testing devices struggle to simulate various road surface conditions, particularly those affected by weather conditions such as rain or snow, during bench tests.
Innovation Solution
A tire testing device that includes a carriage capable of traveling along a road surface, with adjustable wheel alignment and load settings, allowing simulation of different road conditions by adjusting camber, slip angle, and load on the test tire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the simulated road surface is made to run at high speed during the test, then the test can be performed in conventional bench test conditions, but it becomes difficult to perform the test in road surface conditions in which the road surface is covered with rain, snow, gravel or the like
Solution Approach 1:
Instead of moving the road surface at high speed as in conventional bench tests, the invention inverts the approach by keeping the road surface stationary and moving the carriage with the test tire along it. This allows the test tire to contact the stationary road surface under various conditions without requiring the road surface to move at high speed, thereby enabling simulation of different road surface conditions while maintaining test validity
Solution Approach 2:
The invention introduces dynamic adjustment capabilities through the alignment part that can change the orientation and height of the axle part, allowing adjustment of wheel alignment and load. This dynamic adaptability enables the test system to simulate various road conditions by adjusting parameters such as camber angle and slip angle, even though the road surface itself remains stationary
2Adaptability or versatility
If the road surface is kept stationary, then various road surface conditions can be simulated, but the test setup becomes more complex compared to conventional moving road surface tests
Solution Approach 1:
The alignment part serves multiple functions: it adjusts the orientation of the axle part for wheel alignment, changes the height of the axle part for load adjustment, and enables camber and slip angle adjustments. By consolidating these multiple adjustment functions into a single alignment mechanism, the invention reduces overall system complexity while maintaining the ability to simulate various road conditions
Data Source
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AI summary
A tire testing device according to one embodiment of the present invention includes a road surface, and a carriage capable of rotatably holding a test wheel on which a test tire is mounted and traveling along the road surface in a state where the test tire is made to contact the road surface. The carriage includes an axle part that rotatably supports the test wheel, and an alignment part capable of adjusting wheel alignment of the test wheel by changing orientation of the axle part. The alignment part includes a load adjusting part capable of adjusting load acting on the test wheel by changing a height of the axle part. The load adjusting part includes a first movable frame supported to be movable up and down, a linear guide that guides the up- and-down movement of the first movable frame, and a first drive unit that drives the first movable frame up and down.