Inside Drum Tire Tester with Linear Motor Drive
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Solution Overview
Problem
Inside drum-type tire testing devices face issues with poor operability, test precision, structural strength, and large size due to cantilever-supported drive shafts and external motors, leading to inefficient tire testing operations.
Innovation Solution
A tire testing device with a cylindrical rotating drum supported by a linear motor and a fixed support member on the floor, featuring a pseudo-road surface with tapered faces and drainage grooves, allowing for improved access, enhanced strength, and reduced size, along with water recycling and cooling capabilities for various testing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a cantilever-supported drive shaft and external motor are used to drive the rotating drum, then the drum can be rotated, but the device size increases and floor area occupied increases
Solution Approach 1:
The rotating drum is nested within the fixed support member, with the linear motor integrated between them. This nested configuration eliminates the need for external motors and drive shafts, significantly reducing the device's footprint and floor area while maintaining full drum rotation capability.
Solution Approach 2:
The traditional mechanical drive system (external motor + drive shaft + cantilever support) is replaced with a linear motor that directly generates rotational motion. This substitution eliminates bulky mechanical components and reduces the overall device size and floor space requirements.
2Power
If a cantilever-supported drive shaft is used to drive the rotating drum, then the drum can be rotated, but the device complexity increases
Solution Approach 1:
The complex mechanical drive system consisting of drive shafts, bearings, and cantilever supports is replaced with a linear motor that directly converts electrical energy to mechanical motion. This substitution dramatically simplifies the drive mechanism while maintaining full rotational control of the drum.
Solution Approach 2:
The drive shaft and associated mechanical transmission components are completely extracted from the system. The linear motor is positioned directly between the fixed support member and rotating drum, eliminating intermediate mechanical elements and reducing overall system complexity.
3Power
If a cantilever-supported drive shaft structure is used, then the drum can be driven, but the structural strength is compromised
Solution Approach 1:
Instead of supporting the drum from the outside via a cantilevered drive shaft, the fixed support member is positioned inside the drum and supports it from the interior. This inverted support configuration provides much stronger structural support, as the load is borne by the rigid fixed support member rather than a flexible cantilever shaft.
4Power
If the drive shaft and motor are positioned on the outer side of the drum, then the drum can be driven, but the device size increases
Solution Approach 1:
The linear motor is nested within the space between the fixed support member and the rotating drum, rather than being positioned externally. This internal placement of the drive mechanism eliminates the need for external motor housings and mounting structures, significantly reducing the overall device volume and size.
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
The solution enhances operability, test precision, and structural strength while reducing the device's size and floor area, enabling efficient and precise tire testing under different conditions, including wet and icy surfaces, with stable water film management and adjustable tire load and posture.
Implementation Method 1
a linear motor provided between the rotating drum and the fixed support member for rotationally driving the rotating drum
Implementation Method 2
rotation guide means constituted by a pair of guide rails and a pair of guide grooves
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3A~3C
AI summary
An object of the present invention is to provide an inside drum-type tire testing device, which can significantly improve operability and test precision, reliably has strength high enough to eliminate any concern about strength thereof, and has relatively small size and significantly small floor-occupied area. Specifically, the present invention provides a tire testing device, comprising: an inside drum-type cylindrical rotating drum 1; a fixed support member 2 for surrounding the rotating drum 1 from the outer peripheral side of the drum via rotation guide means 3; and a linear motor 4 provided between the rotating drum 1 and the fixed support member 2, for rotationally driving the rotating drum 1.