On-Road Tire Test Wheel Drive With Electric Torque Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing on-road tire testing devices require a large space for hydraulic pressure supply systems, limiting space for test equipment and operator workspace, and are prone to hydraulic oil leaks that contaminate the test tire and road surface, reducing test accuracy.
Innovation Solution
A self-propelled tire testing device with a power unit that includes a rotation output unit and a torque applying unit, allowing for precise control of the test wheel's rotation speed and torque without the need for a large hydraulic system, thereby optimizing space usage and reducing contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a hydraulic pressure supply device is installed to drive the hydraulic motor, then the test wheel can be driven with large torque, but a large space in the vehicle is occupied by the hydraulic pressure supply device
Solution Approach 1:
The patent replaces the hydraulic pressure supply device with an electric motor having a large capacity. This substitution eliminates the need for hydraulic systems while providing the required large torque for driving the test wheel, thereby resolving the space occupation problem caused by hydraulic equipment.
Solution Approach 2:
The patent changes the power source parameter from hydraulic to electric, specifically using an electric motor with large capacity. This parameter change allows the system to generate sufficient torque without requiring the bulky hydraulic pressure supply device, thus reducing the space occupied in the vehicle.
2Force
If a large capacity electric motor is used to drive the test wheel, then the required torque can be provided, but it is difficult to install such a large electric motor in the vehicle
Solution Approach 1:
The patent divides the power transmission system into segments: the large capacity electric motor is installed outside the vehicle, and only the necessary transmission components are installed within the vehicle. This segmentation allows the use of a large motor without compromising the ease of installation and vehicle space utilization.
Solution Approach 2:
The patent introduces a transmission mechanism as an intermediary between the large capacity electric motor and the test wheel. This intermediary allows the motor to be positioned outside the vehicle while still effectively transmitting torque to the test wheel, thus resolving the installation difficulty.
3Force
If a hydraulic system is used to drive the test wheel, then large torque can be applied, but hydraulic oil leaks may contaminate the test tire and road surface, reducing test accuracy
Solution Approach 1:
The patent substitutes the hydraulic system with an electric motor-driven system. This replacement eliminates the risk of hydraulic oil leaks that would contaminate the test tire and road surface, thereby preserving test accuracy while still providing the necessary large torque for driving the test wheel.
Data Source
AI summary
A tire testing device includes a vehicle, and a test unit provided in the vehicle and capable of supporting a test wheel on which a test tire is mounted in a state in which the test wheel is in contact with a road surface. The test unit includes a power unit configured to output power for rotationally driving the test wheel. The power unit includes a rotation output unit configured to output a rotational motion of a rotation speed corresponding to a traveling speed of the vehicle, and a torque applying unit configured to add torque to the rotational motion to output the torque, the rotation output unit includes a driven wheel configured to contact a road surface, a first axle coupled to the driven wheel, and a first transmission mechanism configured to couple the first axle to an input shall of the torque applying unit.