Friction Wheel Drum Drive for Fast Tire Bench Synchronization
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Solution Overview
Problem
Existing tire testing stands face long synchronization times due to the large moment of inertia of revolving drums, which negatively impact cycle times and test results.
Innovation Solution
A revolving drum arrangement with a friction wheel drive mounted on a carriage that can be moved along an infeed direction to engage and disengage with the drum body, allowing independent speed adjustment and synchronization with the vehicle tire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a drive for accelerating or braking the revolving drum is provided, then synchronization time is reduced, but the rolling behavior of the revolving drum and thus also on the rolling behavior of the vehicle tire to be tested is adversely affected
Solution Approach 1:
The drive system is segmented into two independent parts: a first drive unit that drives the drum body and a second drive unit that drives only the friction wheel. This segmentation allows the drum body to maintain its natural rolling behavior while the friction wheel provides controlled acceleration or braking without directly influencing the tire's rolling characteristics during testing.
Solution Approach 2:
The friction wheel acts as an intermediary element between the drive system and the drum body. Instead of directly driving the drum body (which would affect rolling behavior), the friction wheel transmits force indirectly through friction contact, enabling speed adjustment while preserving the natural rolling dynamics of the drum and tire system.
2Productivity
If the friction wheel drive is always in contact with the drum body, then speed adjustment is continuous, but the rolling behavior of the vehicle tire is adversely affected during testing
Solution Approach 1:
The contact between the friction wheel and drum body is made dynamic rather than static. The friction wheel can be pressed against the drum body during acceleration or braking phases, and retracted during testing phases. This dynamic engagement allows continuous speed adjustment capability when needed while eliminating interference during actual tire testing operations.
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
Enables rapid synchronization of drum and tire speeds, reducing cycle times and minimizing interference with test results.
Implementation Method 1
a friction wheel drive (6) which is designed to drive the drum body (5) when it is in contact with the drum body (5)
Data Source
AI summary
A revolving drum arrangement (2) for a tire testing rig (1) has a drum body (5) and a friction wheel drive (6), wherein on its outer circumference (9) the drum body (5) has a running surface (9) for making contact with a vehicle tire (4) and is arranged to rotate about its running axle. The friction wheel drive (6) is designed to drive the drum body (5) when it is in contact with the drum body (5). The revolving drum arrangement (2) according to the invention is distinguished in that the friction wheel drive (6) is arranged on a friction wheel carriage (10) that is designed to move the friction wheel drive (6) along an infeed direction so that the friction wheel drive (6) can be brought into contact with the drum body (5). A corresponding tire testing rig (1) and method are also disclosed.