Dynamic torque measurement tool for stepper motor

Abstract

The utility model provides a step motor dynamic torque measurement frock relates to electrode measurement equipment technical field, including bearing base and motor main part, bearing base top surface is equipped with L type support frame and telescopic guide frame respectively, and the top surface of L type support frame is equipped with positioning assembly, and the top end side of telescopic guide frame is connected and is equipped with monitoring disc, and the surface of monitoring disc is equipped with torque sensor, and the surface of monitoring disc is embedded and is equipped with guide ball, and the surface of monitoring disc is movably connected and is equipped with transmission torus, and the end of transmission torus away from monitoring disc is hinged and is equipped with flexible coupling, and the end of flexible coupling away from transmission torus is hinged and is equipped with the surface of motor's output shaft, and the multi -point torque sensor on monitoring disc is arranged flexibly through damping telescopic axle, can capture the torque change of different angle, overcomes the limitation of single point measurement, improves precision and data comprehensiveness greatly, provides convenient, efficient technical support for the performance analysis and quality detection of step motor, is especially suitable for research and development and production scene.

Description

Technical Field

[0001] This utility model relates to the field of electrode measurement equipment technology, and in particular to a tooling for measuring the dynamic torque of a stepper motor. Background Technology

[0002] According to Chinese Publication No. CN117309207A, a device for measuring the low torque output of a micro stepper motor includes a micro stepper motor, a nylon coupling, and an automatic braking assembly. It further includes a torque measuring component for measuring the torque of the micro stepper motor. One end of the torque measuring component is fixedly connected to the output shaft of the micro stepper motor via a nylon coupling, and the other end of the torque measuring component is fixedly connected to the automatic braking assembly via a nylon coupling. The torque measuring component includes a housing, a fixing box fixedly installed on the inner wall of the top of the housing, and a rotating shaft disposed within the housing. One end of the rotating shaft is fixedly connected to the output shaft of the micro stepper motor via a nylon coupling, and the other end of the rotating shaft is fixedly connected to the automatic braking assembly via a nylon coupling. This invention, by setting up a torque measuring component, not only achieves a small measurement range but also achieves high repeatability accuracy.

[0003] The aforementioned patent documents and prior art have the following technical problems:

[0004] 1. In traditional stepper motor torque monitoring, torque transmission often relies on bolt connections or simple keyway designs, which are prone to low transmission efficiency due to loosening or slippage. At the same time, the installation and disassembly process is complicated and time-consuming. In addition, traditional tooling often uses single-point torque sensors, which cannot capture torque fluctuations at different angles of the motor output shaft during dynamic operation, resulting in single measurement data that is difficult to fully reflect the motor performance.

[0005] 2. The fixing device of traditional stepper motor torque measurement fixture is usually a rigid clamping structure, which is difficult to adapt to motors of different sizes or shapes. It requires repeated adjustments during installation, which can easily cause offset or loosening, affecting the stability of the measurement. The positioning of the measurement components mostly depends on manual adjustment, which is cumbersome and time-consuming. It is particularly inefficient in batch testing and cannot meet the needs of industrialization. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies, such as limited torque measurement and poor installation adaptability, by proposing a dynamic torque measurement fixture for stepper motors.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a stepper motor dynamic torque measuring fixture, including a load-bearing base and a motor body. The top surface of the load-bearing base is respectively provided with an L-shaped support frame and a telescopic guide frame. The top surface of the L-shaped support frame is provided with a positioning component, which engages with the motor body. A monitoring disc is connected to the top side of the telescopic guide frame. A torque sensor is provided on the surface of the monitoring disc. Guide balls are embedded in the surface of the monitoring disc. A transmission ring is movably sleeved on the surface of the monitoring disc. A flexible coupling is engaged at the end of the transmission ring away from the monitoring disc. The end of the flexible coupling away from the transmission ring is engaged with the surface of the motor's output shaft.

[0008] Preferably, the positioning component includes a first L-shaped positioning plate and a second L-shaped positioning plate. The top surface of the L-shaped support frame and the side surface near the top are provided with telescopic cavities. The ends of the first L-shaped positioning plate and the second L-shaped positioning plate are provided with positioning springs, and the ends of the positioning springs are fixed to the inside of the telescopic cavities.

[0009] Preferably, the top surface of the second L-shaped positioning plate is arc-shaped, and a positioning screw spring is vertically inserted through the top surface of the second L-shaped positioning plate. The top of the positioning screw spring is provided with an arc-shaped support bracket, and the top surface of the arc-shaped support bracket abuts against the output shaft surface of the motor body.

[0010] Preferably, a damping telescopic shaft is embedded in the circumference of the side of the monitoring disk, a mounting bracket is connected to the top of the damping telescopic shaft, and a torque sensor is vertically threaded to the end of the mounting bracket.

[0011] Preferably, a controller is bolted to the surface of the telescopic guide frame, the controller is electrically connected to a torque sensor, and the torque sensor abuts against the surface of the transmission ring.

[0012] Preferably, the flexible coupling is connected to the transmission ring using a regular polygonal tenon and mortise joint, and the transmission ring and the monitoring disk are connected by a movable shaft.

[0013] Preferably, the telescopic guide frame is slidably connected to the surface of the load-bearing base, and a cylinder is horizontally embedded in the end of the load-bearing base near the L-shaped support frame, and the movable end of the cylinder is connected to the side of the telescopic guide frame.

[0014] Beneficial effects

[0015] This invention employs a flexible coupling and a polygonal tenon-and-mortise joint design for the transmission ring, ensuring efficient and slip-free torque transmission. It also simplifies installation and maintenance, allowing for rapid assembly without additional tools. The multi-point torque sensors on the monitoring disc are flexibly arranged via a damped telescopic shaft, enabling them to capture torque changes at different angles. This overcomes the limitations of single-point measurement, significantly improving accuracy and data comprehensiveness. It provides convenient and efficient technical support for stepper motor performance analysis and quality inspection, making it particularly suitable for R&D and production scenarios.

[0016] In this invention, the positioning components on the L-shaped support frame are self-adaptively fixed by springs, in conjunction with the positioning screw spring and the arc-shaped support bracket, to stably clamp motors of different sizes, enhancing adaptability and operational stability. The cylinder-driven telescopic guide frame automatically adjusts the position of the monitoring disc along the slide rail, replacing manual operation and improving positioning accuracy and efficiency. This automated design shortens preparation time and optimizes the operation process, enabling the tooling to demonstrate significant practicality and economic value in industrial batch testing. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a connection structure diagram of the L-shaped support frame of this utility model;

[0020] Figure 4 This is a connection structure diagram of the telescopic guide frame of this utility model;

[0021] Figure 5 This is a diagram of the connection structure of the monitoring disk of this utility model;

[0022] Figure 6 This is a disassembled structural diagram of the monitoring disk of this utility model;

[0023] Figure 7 This is a disassembled structural diagram of the transmission ring connection of this utility model.

[0024] Legend:

[0025] 1. Load-bearing base; 2. L-shaped support frame; 3. Telescopic guide frame; 4. Controller; 5. Positioning assembly; 501. First L-shaped positioning plate; 502. Second L-shaped positioning plate; 503. Telescopic cavity; 504. Positioning spring; 505. Positioning screw spring; 506. Arc-shaped support bracket; 6. Flexible coupling; 7. Transmission ring; 8. Motor body; 9. Monitoring disc; 10. Guide ball; 11. Damping telescopic shaft; 12. Mounting bracket; 13. Torque sensor. Detailed Implementation

[0026] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0027] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0029] Reference Figures 1 to 7 A stepper motor dynamic torque measurement fixture includes a load-bearing base 1 and a motor body 8. The top surface of the load-bearing base 1 is provided with an L-shaped support frame 2 and a telescopic guide frame 3. The top surface of the L-shaped support frame 2 is provided with a positioning component 5, which engages with the motor body 8. A monitoring disc 9 is connected to the top side of the telescopic guide frame 3. A torque sensor 13 is provided on the surface of the monitoring disc 9. Guide balls 10 are embedded in the surface of the monitoring disc 9, reducing friction when the transmission ring 7 and the monitoring disc 9 come into contact. The transmission ring 7 is movably sleeved on the surface of the monitoring disc 9. A flexible coupling 6 is engaged at the end of the transmission ring 7 away from the monitoring disc 9. The end of the flexible coupling 6 away from the transmission ring 7 engages with the output shaft surface of the motor. The load-bearing base 1 serves as a basic support platform, supporting the L-shaped support frame 2 for fixing the motor body 8, and the telescopic guide frame 3 for supporting the measurement component. The positioning component 5 enables the motor to... The stable fixation of the main body 8, together with the monitoring disk 9, transmission ring 7, and flexible coupling 6, constitutes a torque measurement system that transmits the dynamic torque of the motor output shaft to the sensor. The motor body 8 is fixed to the load-bearing base 1 by the positioning component 5 on the L-shaped support frame 2, and its output shaft is connected to the flexible coupling 6. The flexible coupling 6 transmits the rotational motion of the output shaft to the transmission ring 7, which then contacts the torque sensor 13 on the monitoring disk 9. The sensor detects the torque signal. The telescopic guide frame 3 supports the position adjustment of the monitoring disk 9 to ensure alignment with the motor output shaft. When the motor is running, the torque is transmitted to the monitoring disk 9 through the transmission ring 7, triggering the sensor to measure the dynamic torque. The double-end support enhances the stability of the tooling and reduces vibration interference. The combined design of the flexible coupling 6 and the transmission ring 7 achieves smooth torque transmission, protects the sensor, and improves measurement accuracy. The modular structure facilitates installation and adaptation to different models of stepper motors.

[0030] The positioning assembly 5 includes a first L-shaped positioning plate 501 and a second L-shaped positioning plate 502. Telescopic cavities 503 are provided on one side of the top surface and near the top of the side surface of the L-shaped support frame 2. Positioning springs 504 are provided at the ends of both the first L-shaped positioning plate 501 and the second L-shaped positioning plate 502, and the ends of the positioning springs 504 are fixed inside the telescopic cavities 503. The positioning assembly 5 uses the first and second L-shaped positioning plates 502 to fix the motor body 8 horizontally and vertically. The telescopic cavities 503 and the positioning springs 504 provide elastic adjustment to ensure moderate and stable clamping force. The first L-shaped positioning plate 501 and the second L-shaped positioning plate 502 are respectively positioned from the motor body 8. Clamping force is applied to the sides and top of the main body 8. Positioning springs 504 are embedded in the telescopic cavity 503. When the motor is installed, the springs are compressed, generating a reaction force that pushes the positioning plates against the motor surface, achieving adaptive clamping. The motor body 8 is placed on top of the L-shaped support frame 2. The first L-shaped positioning plate 501 adheres to the motor from the side via spring force, while the second L-shaped positioning plate 502 presses it down from the top. The spring's extension and retraction adjustment dynamically balances the clamping force, preventing over-tightening or loosening. The adaptive spring design simplifies the installation process, allowing the motor to be fixed without additional tools. The double L-shaped positioning plate structure improves clamping stability and alignment, reducing offset during operation. The telescopic cavity... 503 protects the spring and extends its service life. The top surface of the second L-shaped positioning plate 502 is arc-shaped, and a positioning screw spring 505 is vertically inserted through the top surface of the second L-shaped positioning plate 502. The top of the positioning screw spring 505 is provided with an arc-shaped support bracket 506, and the top surface of the arc-shaped support bracket 506 abuts against the surface of the output shaft of the motor body 8. The second L-shaped positioning plate 502 further optimizes the support and positioning of the motor output shaft through the arc-shaped top surface and the positioning screw spring 505. The arc-shaped support bracket 506 directly contacts the output shaft, providing additional vertical fixing force. The arc-shaped top surface is adapted to the shape of the motor. The positioning screw spring 505 can be adjusted in height by rotation, causing the arc-shaped support bracket 506 to press down. The screw provides precise positioning force to the output shaft surface, while the spring maintains elastic cushioning. The two work together to ensure the stability of the output shaft. After placing the motor, adjust the second L-shaped positioning plate 502 so that its arc-shaped top surface is close to the output shaft. Rotate the positioning screw spring 505 to move the arc-shaped support bracket 506 down and contact the output shaft. After the screw is fixed, the spring maintains elastic support to prevent loosening. The contact design between the arc-shaped support bracket 506 and the output shaft increases the contact area and reduces local stress concentration. The positioning screw spring 505 provides adjustability to adapt to motor output shafts of different heights. The combination of the spring and screw dual fixing mechanism enhances the stability of the output and the consistency of measurement.

[0031] A damping telescopic shaft 11 is embedded in the circumference of the side of the monitoring disk 9. A mounting bracket 12 is connected to the top of the damping telescopic shaft 11. A torque sensor 13 is vertically threaded to the end of the mounting bracket 12. The damping telescopic shaft 11 and the mounting bracket 12 enable flexible positioning and stable installation of the torque sensor 13, ensuring precise contact between the sensor and the transmission ring 7. The damping telescopic shaft 11 is embedded in the side of the monitoring disk 9 and controls the telescopic speed through the damping effect, avoiding impacts caused by rapid movement. The mounting bracket 12 is connected to the top of the telescopic shaft, and the sensor is fixed to the bracket by threads. The height and angle of the bracket can be adjusted to make the sensor fit the transmission ring 7. The length of the damping telescopic shaft 11 can be adjusted according to the position of the transmission ring 7. The mounting bracket 12 can be adjusted by threads to make the sensor contact the surface of the transmission ring 7. When the motor is running, the sensor detects the torque signal transmitted by the ring. The damping telescopic shaft 11 provides smooth adjustment and protects the sensor from impact. The threaded connection of the mounting bracket 12 facilitates fine-tuning and sensor replacement, improving flexibility and maintainability. The multi-point installation design supports multiple sensors working together, enhancing data acquisition capabilities.

[0032] The flexible coupling 6 is connected to the transmission ring 7 using a regular polygonal tenon and mortise joint. A movable shaft connects the transmission ring 7 and the monitoring disk 9. The regular polygonal tenon and mortise joint enhances the connection strength between the flexible coupling 6 and the transmission ring 7, while the movable shaft ensures flexible rotation of both. The output end of the flexible coupling 6 is designed as a regular polygonal protrusion, which engages with the matching groove on the inner side of the transmission ring 7, forming a slip-free torque transmission. The transmission ring 7 is movably connected to the monitoring disk 9 via bearings or bushings, ensuring rotational freedom. The flexible coupling 6 is quickly assembled with the transmission ring 7 through the tenon and mortise structure. When the motor rotates, the torque is transmitted to the transmission ring 7 via the coupling. The transmission ring 7 rotates freely on the monitoring disk 9, triggering sensor measurements. The tenon and mortise joint simplifies installation, improves transmission efficiency and reliability, while the movable shaft reduces frictional resistance, extends component life, and features a compact and easily disassembled structure for convenient maintenance. The guide frame 3 is slidably connected to the surface of the load-bearing base 1. A cylinder is horizontally embedded inside the end of the load-bearing base 1 near the L-shaped support frame 2, and the movable end of the cylinder is connected to the side of the telescopic guide frame 3. The cylinder drives the telescopic guide frame 3 to slide along the load-bearing base 1, realizing the automatic adjustment of the position of the monitoring disc 9. It is suitable for different motor sizes. The cylinder is embedded in the load-bearing base 1, and the movable end is pushed to extend and retract by air pressure, which drives the telescopic guide frame 3 to move on the slide rail on the base surface. The telescopic guide frame 3 adjusts the distance between the monitoring disc 9 and the motor output shaft to ensure the effective connection of the flexible coupling 6. According to the motor size, the cylinder is activated to adjust the position of the telescopic guide frame 3. After the monitoring disc 9 moves to the appropriate position, the cylinder locks. After the connection is completed, the torque is measured. The cylinder drive realizes automatic adjustment, improves operation efficiency and accuracy, and the sliding connection enhances the adaptability and stability of the tooling, reduces manual adjustment time, and is suitable for batch testing scenarios. Specific Implementation Example 2:

[0034] Reference Figures 1 to 7 Based on the content of the above specific embodiments, the following content is further disclosed:

[0035] A controller 4 is bolted to the surface of the telescopic guide frame 3. The controller 4 is electrically connected to the torque sensor 13, which abuts against the surface of the transmission ring 7. The controller 4 is responsible for processing the signal from the torque sensor 13 and outputting the measurement result, ensuring the intelligence and real-time performance of the measurement system. The torque sensor 13 contacts the transmission ring 7, detects the torque change generated by its rotation, and generates an electrical signal. The signal is transmitted to the controller 4 through an electrical connection. The controller 4 amplifies, filters, and calculates the signal, and outputs the torque value. The sensor detects the torque of the transmission ring 7 and outputs the raw signal. The controller 4 receives the signal, processes it in real time, and records it. The user can view the dynamic torque data through the interface of the controller 4. The controller 4 is integrated on the telescopic guide frame 3, has a compact structure, is easy to operate, and the electrical connection ensures the stability of signal transmission, improves measurement accuracy, supports real-time monitoring, and meets the needs of dynamic testing. Specific Implementation Example 3:

[0037] Reference Figures 1 to 7 Based on the content of the above specific embodiments, the following content is further disclosed:

[0038] When measuring the torque of the motor body 8, the motor body 8 is fixed to the L-shaped support frame 2 by the positioning component 5. Its output shaft is connected to the flexible coupling 6. The flexible coupling 6 transmits the rotational torque of the motor output shaft to the transmission ring 7. The transmission ring 7 then contacts the torque sensor 13 on the monitoring disk 9. The torque sensor 13 detects the dynamic torque signal transmitted by the transmission ring 7 and processes and outputs the measurement result through the controller 4. The entire process is centered on the torque transmission driven by the motor operation. The flexible coupling 6 ensures a smooth connection, the transmission ring 7 realizes torque distribution, and the torque sensor 13 completes accurate measurement.

[0039] Flexible coupling 6: Serving as a bridge between the motor output shaft and the transmission ring 7, the flexible coupling 6 is tightly connected to the transmission ring 7 via a regular polygonal tenon and mortise joint. Its internal elastic material, such as rubber or bellows, absorbs minor axial and radial deviations, ensuring smooth torque transmission and avoiding vibration interference or stress concentration caused by rigid connections.

[0040] Transmission ring 7: The transmission ring 7 is movably sleeved on the monitoring disk 9. It receives the motor torque through the insertion of the flexible coupling 6 and distributes it evenly to the outer ring surface. The ring and the monitoring disk 9 are movably connected by bearings or bushings to ensure rotational freedom and transmit torque to the contacting sensor.

[0041] Torque sensor 13: Mounted on the side of the monitoring disk 9, it uses strain gauge or thin-film technology to detect the torque changes generated by the rotation of the ring, converting them into electrical signals and outputting them to the controller 4. The coordinated operation of multiple sensors can capture the spatial distribution of torque;

[0042] The overall principle is based on the stepwise transmission of torque from the output shaft through the flexible coupling 6 to the transmission ring 7, and then to the sensor, ultimately achieving dynamic measurement.

[0043] The measurement steps are as follows:

[0044] Connecting the flexible coupling 6: Place the stepper motor body 8 on the L-shaped support frame 2 and fix it by the first L-shaped positioning plate 501, the second L-shaped positioning plate 502 and the positioning screw spring 505 of the positioning assembly 5. Engage one end of the flexible coupling 6 with the motor output shaft by keyway or clamping, and insert the other end into the transmission ring 7 through the regular polygonal tenon structure to ensure a firm connection.

[0045] Adjust the position of the transmission ring 7 and the sensor: Start the cylinder to drive the telescopic guide frame 3 to slide, so that the monitoring disk 9 is close to the motor output shaft, ensure that the transmission ring 7 is aligned with the flexible coupling 6, adjust the damping telescopic shaft 11 and the mounting bracket 12 to make the torque sensor 13 in close contact with the surface of the transmission ring 7, and confirm that the contact force is uniform through the bracket thread for fine adjustment.

[0046] Starting the motor and measuring torque: Turn on the stepper motor and make it run at the set speed or load. The output shaft generates dynamic torque, which is transmitted to the transmission ring 7 through the flexible coupling 6. The rotation of the transmission ring 7 drives the sensor to detect the torque change.

[0047] Data acquisition and processing: The torque sensor 13 converts the detected mechanical signal into an electrical signal and transmits it to the controller 4 on the telescopic guide frame 3. The controller 4 amplifies, filters and calculates the signal, and outputs the torque value or distribution curve in real time. Users can view the results through the display interface.

[0048] The flexible coupling 6 absorbs minor vibrations during motor operation, the transmission ring 7 transmits torque evenly, and multiple sensors capture dynamic changes to ensure that the measurement results reflect the real working conditions. The design of the tenon and mortise joint and the damping telescopic shaft 11 reduces transmission clearance and contact error, improving the stability and accuracy of the measurement.

[0049] In summary:

[0050] 1. The flexible coupling 6 and the transmission ring 7 adopt a regular polygonal tenon and mortise joint design to ensure efficient torque transmission without slippage, while simplifying the installation and maintenance process. It can be quickly assembled without additional tools. The multi-point torque sensor 13 on the monitoring disk 9 is flexibly arranged through the damping telescopic shaft 11, which can capture torque changes at different angles, overcome the limitations of single-point measurement, and greatly improve accuracy and data comprehensiveness. It provides convenient and efficient technical support for the performance analysis and quality inspection of stepper motors, and is particularly suitable for R&D and production scenarios.

[0051] 2. The L-shaped support frame 2 utilizes a spring-driven self-adaptive fixing mechanism on the positioning component 5, along with a positioning screw spring 505 and an arc-shaped support bracket 506, to stably clamp motors of different sizes, enhancing adaptability and operational stability. The cylinder-driven telescopic guide frame 3 automatically adjusts the position of the monitoring disc 9 along the slide rail, replacing manual operation and improving positioning accuracy and efficiency. This automated design shortens preparation time, optimizes the operation process, and makes the tooling demonstrate significant practicality and economic value in industrial batch testing.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A stepper motor dynamic torque measuring fixture, comprising a load-bearing base (1) and a motor body (8), characterized in that: The top surface of the load-bearing base (1) is provided with an L-shaped support frame (2) and a telescopic guide frame (3). The top surface of the L-shaped support frame (2) is provided with a positioning component (5), and the positioning component (5) is engaged with the motor body (8). The top side of the telescopic guide frame (3) is connected to a monitoring disc (9). The surface of the monitoring disc (9) is provided with a torque sensor (13). The surface of the monitoring disc (9) is embedded with a guide ball (10). The surface of the monitoring disc (9) is movably sleeved with a transmission ring (7). The end of the transmission ring (7) away from the monitoring disc (9) is engaged with a flexible coupling (6). The end of the flexible coupling (6) away from the transmission ring (7) is engaged with the output shaft surface of the motor.

2. The stepper motor dynamic torque measuring fixture according to claim 1, characterized in that: The positioning component (5) includes a first L-shaped positioning plate (501) and a second L-shaped positioning plate (502). The L-shaped support frame (2) has telescopic cavities (503) on one side of the top surface and near the top of the side surface. The ends of the first L-shaped positioning plate (501) and the second L-shaped positioning plate (502) are provided with positioning springs (504), and the ends of the positioning springs (504) are fixed inside the telescopic cavities (503).

3. The stepper motor dynamic torque measuring fixture according to claim 2, characterized in that: The top surface of the second L-shaped positioning plate (502) is arc-shaped, and a positioning screw spring (505) is vertically inserted through the top surface of the second L-shaped positioning plate (502). The top of the positioning screw spring (505) is provided with an arc-shaped support bracket (506), and the top surface of the arc-shaped support bracket (506) abuts against the output shaft surface of the motor body (8).

4. The stepper motor dynamic torque measuring fixture according to claim 1, characterized in that: The monitoring disk (9) has a damping telescopic shaft (11) embedded in its side circumference. The top of the damping telescopic shaft (11) is connected to a mounting bracket (12), and the end of the mounting bracket (12) is vertically threaded with a torque sensor (13).

5. The stepper motor dynamic torque measuring fixture according to claim 1, characterized in that: The telescopic guide frame (3) is bolted with a controller (4), which is electrically connected to a torque sensor (13), and the torque sensor (13) abuts against the surface of the transmission ring (7).

6. The stepper motor dynamic torque measuring fixture according to claim 1, characterized in that: The flexible coupling (6) and the transmission ring (7) are connected by a regular polygonal tenon and mortise joint, and the transmission ring (7) and the monitoring disk (9) are connected by a movable shaft.

7. The stepper motor dynamic torque measuring fixture according to claim 1, characterized in that: The telescopic guide frame (3) is slidably connected to the surface of the load-bearing base (1). A cylinder is horizontally embedded in the end of the surface of the load-bearing base (1) near the L-shaped support frame (2), and the movable end of the cylinder is connected to the side of the telescopic guide frame (3).

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