Rotating Shaft Torsion Test Device with Dual Driving Units
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Solution Overview
Problem
Existing torsion test methods for power transmission devices cannot accurately evaluate performance under actual usage conditions, as they apply loads to static shafts rather than rotating shafts, failing to simulate real-world usage scenarios.
Innovation Solution
A torsion test device with first and second driving units, each equipped with a servo motor, reduction gear, chuck, torque sensor, and rotation detector, allowing for the application of torques to input/output shafts while rotating, and a controller to manage torques and rotational frequencies, enabling accurate performance evaluation under dynamic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the power transmission shaft is placed in a static state during the test, then the test setup is simple, but it is impossible to accurately evaluate performance under actual usage environment
Solution Approach 1:
The patent applies dynamics by transitioning from a static test setup to a dynamic one where the power transmission shaft rotates during testing. The first and second driving units enable rotational movement of the input shaft and output shaft respectively, allowing the test to simulate actual usage conditions where the shaft is rotating while torques are applied, thereby accurately evaluating performance under dynamic conditions.
2Reliability
If driving units with servo motors and reduction gears are used to apply torques to rotating shafts, then performance evaluation under actual usage conditions is achieved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the test device into separate driving units - a first driving unit for the input shaft and a second driving unit for the output shaft. Each driving unit is a self-contained module with its own servo motor, reduction gear, chuck, torque sensor, and rotation detector. This modular segmentation allows for independent control and optimization of each shaft's driving mechanism, improving test reliability while managing complexity through standardized modules.
Solution Approach 2:
The patent applies universality by designing driving units that can perform multiple functions: applying torques, detecting rotational frequency, and supporting the shaft. The chuck structure serves both to clamp the shaft and to transmit torque, while the reduction gear both reduces motor speed and supports the shaft. This multi-functionality reduces the number of separate components needed, managing device complexity while maintaining high test reliability.
3Strength
If the power transmission shaft is supported close to the gear mechanism and chuck, then strains on the shaft are reduced, but the structural complexity increases
Solution Approach 1:
The patent applies merging by combining the support function with existing structural elements. The gear mechanism and chuck are not only functional components for torque transmission but also serve as support points for the power transmission shaft. By integrating the support function into these existing components rather than adding separate support structures, the patent reduces shaft strains while minimizing increases in structural complexity.
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 device accurately evaluates the performance of power transmission devices by simulating actual usage conditions, providing detailed torque and rotational frequency data, and supporting the test setup to prevent strain on the power transmission shaft, ensuring a durable and precise test.
Implementation Method 1
Each of the first and second driving units includes a servo motor
Implementation Method 2
a reduction gear configured to reduce a rotational speed of an output shaft of the servo motor
Implementation Method 3
a torque sensor configured to transmit the output force from the reduction gear to the chuck, and detect a torque output from the reduction gear
Implementation Method 4
a rotation detector configured to detect a rotational frequency of the chuck
Implementation Method 5
a bearing supported by the gear case, and a gear mechanism supported by the gear case via the bearing
Data Source
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AI summary
A torsion test device configured to apply torques to input/output shafts of a test body, including a first driving unit connecting with an input shaft of the test body, and a second driving unit connecting with an output shaft of the test body, each driving unit including a servo motor, a reduction gear reducing a rotational speed of an output shaft of the servo motor, a chuck configured to clamp one of the input shaft and the output shaft of the test body, and transmit an output force from the reduction gear to the one of the input shaft and the output shaft of the test body, a torque sensor configured to transmit the output force from the reduction gear to the chuck, and detect a torque output from the reduction gear, and a rotation detector configured to detect a rotational frequency of the chuck.