A motor testing fixture

Abstract

This application relates to a motor testing fixture, belonging to the field of motor testing technology. It effectively suppresses vibration interference, improves the accuracy of test data, and has good overall practicality. The fixture includes: a test bench, a motor fixing mechanism, a motor under test, a speed testing mechanism, a torque testing mechanism, a voltage testing mechanism, a current testing mechanism, a data acquisition and display module, and a control module. The motor fixing mechanism, speed testing mechanism, torque testing mechanism, and data acquisition and display module are all mounted on the upper surface of the test bench, while the control module is located on one side of the test bench. The motor under test is fixed to the motor fixing mechanism, and its output shaft is detachably connected to the input end of the torque testing mechanism via a compensating coupling. The detection end of the speed testing mechanism faces the output shaft of the motor under test. The voltage testing mechanism is connected to the power input end of the motor under test via a wire, and the current testing mechanism is connected in series in the power circuit of the motor under test.

Description

Technical Field

[0001] This application relates to the field of motor testing technology, and in particular to a motor testing fixture. Background Technology

[0002] As is well known, motors inevitably vibrate and shake during operation, especially during start-up, shutdown, or load changes. These vibrations not only affect the motor's own working accuracy and lifespan but also seriously interfere with the testing process, causing abnormal fluctuations and errors in the measurement data of key parameters such as speed and torque. Most existing ordinary motor testing fixtures lack effective vibration reduction and anti-shake designs, and their rigid fixing mechanisms are prone to transmitting vibrations. Torque testing mechanisms have high neutrality requirements and are easily deflected by vibrations, introducing measurement errors. Therefore, developing a motor testing fixture that can effectively suppress vibration interference and improve the accuracy of test data is of great significance for the precision performance evaluation and quality control of motors.

[0003] Therefore, we propose a motor testing fixture. Utility Model Content

[0004] The purpose of this invention is to provide a motor testing fixture to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A motor testing fixture, comprising: The system includes a test bench, a motor mounting mechanism, a motor under test, a speed testing mechanism, a torque testing mechanism, a voltage testing mechanism, a current testing mechanism, a data acquisition and display module, and a control module. The motor fixing mechanism, speed testing mechanism, torque testing mechanism, and data acquisition and display module are all located on the upper surface of the test bench, and the control module is located on one side of the test bench. The motor under test is fixed on the motor fixing mechanism, and its output shaft is detachably connected to the input end of the torque testing mechanism through a compensating coupling. The detection end of the speed testing mechanism faces the output shaft of the motor under test. The voltage testing mechanism is connected to the power input terminal of the motor under test via a wire, and the current testing mechanism is connected in series in the power circuit of the motor under test. The signal input terminal of the data acquisition and display module is connected to the signal output terminals of the speed testing mechanism, torque testing mechanism, voltage testing mechanism, and current testing mechanism, respectively, and the data acquisition and display module is connected to the control module. The output of the control module is connected to the control input of the motor fixing mechanism, the speed testing mechanism, the torque testing mechanism, the voltage testing mechanism, the current testing mechanism, and the data acquisition and display module, respectively.

[0006] As a further embodiment of this utility model: the motor fixing mechanism includes a fixed base, a buffer spring, and a hydraulic damper. The fixed base is fixedly installed on the test bench, and four guide columns are fixedly connected to the fixed base. A slider is slidably arranged on the outside of each of the four guide columns. A motor mounting plate is fixedly connected to the slider for installing the motor to be tested. The buffer spring and the hydraulic damper are arranged in parallel on the outside of the guide columns, and the buffer spring and the hydraulic damper are arranged between the slider and the fixed base.

[0007] As a further embodiment of this utility model: the motor fixing mechanism further includes two fixing mounting plates, which are symmetrically fixedly mounted on the fixing base. A cylinder is detachably mounted on the fixing mounting plate, and the output end of the cylinder is fixedly connected to the fixing plate. An anti-slip plate is adhered to the fixing plate.

[0008] As a further embodiment of this utility model: the torque testing mechanism includes a torque testing mounting plate and a torque sensor. The torque testing mounting plate is fixedly mounted on the test bench, and the torque sensor is detachably mounted on the torque testing mounting plate.

[0009] As a further improvement of this utility model, the compensating coupling has a built-in universal joint structure.

[0010] As a further embodiment of this utility model: the speed testing mechanism includes a slide rod, which is fixedly installed in the test platform through a slide groove. A locking slider is slidably connected to the outside of the slide rod, and a connecting column is fixedly connected to the locking slider. A support plate is fixedly connected to the end of the connecting column away from the locking slider. A speed testing mounting plate is fixedly connected to the support plate, and a speed testing sensor is detachably installed on the speed testing mounting plate.

[0011] As a further improvement of this utility model, auxiliary moving rings are fixedly connected to both sides of the speed test mounting plate.

[0012] As a further improvement of this utility model: the auxiliary moving ring is provided with a finger groove, and the finger groove is provided with anti-slip texture.

[0013] As a further improvement of this utility model, a laser centering emitter can be detachably installed on the rotation speed test mounting plate.

[0014] As a further improvement of this utility model: four support columns are fixedly connected to the bottom of the test platform, and shock-absorbing pads are fixedly connected to the bottom of each of the four support columns.

[0015] Compared with the prior art, the beneficial effects of this utility model are: Through the composite vibration reduction design, compensating coupling and laser alignment transmitter, the interference of vibration and installation deviation on the test results is greatly reduced, ensuring the accuracy of torque and speed data. The cylinder-driven fixed plate, the sliding speed test sensor adjustment mechanism and laser alignment assistance make the installation of the motor under test and the positioning of the speed test sensor very convenient and quick, greatly improving the test efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the structure of the motor mounting plate, fixed mounting plate, and cylinder of this utility model. Figure 3 This is an exploded structural diagram showing the cooperation between the fixed mounting plate, the fixed plate, the anti-slip plate, and the cylinder of this utility model; Figure 4 This is a schematic diagram of the structure of the torque testing mounting plate and torque sensor of this utility model. Figure 5 This is a schematic diagram of the structure of the buffer spring, hydraulic damper, slider and guide post of this utility model; Figure 6 This is a schematic diagram of the structure of the locking slider, sliding rod and speed test mounting plate of this utility model; Figure 7 This utility model Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0017] In the diagram: 1. Test bench; 2. Motor under test; 3. Voltage testing mechanism; 4. Current testing mechanism; 5. Data acquisition and display module; 6. Control module; 7. Compensating coupling; 8. Fixed seat; 9. Buffer spring; 10. Hydraulic damper; 11. Slider; 12. Fixed mounting plate; 13. Fixed plate; 14. Anti-slip plate; 15. Torque testing mounting plate; 16. Torque sensor; 17. Slide rod; 18. Locking slider; 19. Connecting column; 20. Support plate; 21. Speed ​​testing mounting plate; 22. Speed ​​testing sensor; 23. Auxiliary moving ring; 24. Laser centering emitter; 26. Vibration damping pad; 27. Cylinder; 28. Motor mounting plate; 29. ​​Guide column. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The present application will be further described in detail below with reference to the accompanying drawings.

[0020] Please see Figures 1-6 In this embodiment of the utility model, a motor testing fixture includes: Test bench 1, motor fixing mechanism, motor under test 2, speed testing mechanism, torque testing mechanism, voltage testing mechanism 3, current testing mechanism 4, data acquisition and display module 5, and control module 6; The motor fixing mechanism, speed testing mechanism, torque testing mechanism, and data acquisition and display module 5 are all set on the upper surface of the test bench 1, and the control module 6 is set on one side of the test bench 1. The motor 2 under test is fixed on the motor fixing mechanism, and its output shaft is detachably connected to the input end of the torque testing mechanism through a compensating coupling 7. The detection end of the speed testing mechanism faces the output shaft of the motor 2 under test. The voltage testing mechanism 3 is connected to the power input terminal of the motor under test 2 via a wire, and the current testing mechanism 4 is connected in series in the power circuit of the motor under test 2. The signal input terminal of the data acquisition and display module 5 is connected to the signal output terminals of the speed testing mechanism, torque testing mechanism, voltage testing mechanism 3, and current testing mechanism 4, respectively. The data acquisition and display module 5 is connected to the control module 6. The output of the control module 6 is connected to the control input of the motor fixing mechanism, the speed testing mechanism, the torque testing mechanism, the voltage testing mechanism 3, the current testing mechanism 4, and the data acquisition and display module 5, respectively.

[0021] This motor testing fixture allows the motor under test 2 to be quickly clamped and fixed by a cylinder 27 driving an anti-slip plate 14 in the motor fixing mechanism, and vibration is absorbed by a buffer spring 9 and a hydraulic damper 10. After the motor under test 2 is started, its output torque is transmitted to a torque sensor 16 through a compensating coupling 7 with a built-in universal joint. The speed test sensor 22 is precisely aligned with the output shaft of the motor under test 2 with the assistance of a laser centering transmitter 24 to detect the speed in real time. At the same time, the voltage test mechanism 3 and the current test mechanism 4 monitor the input electrical parameters of the motor respectively. All test data are collected and displayed in real time by a data acquisition and display module 5, and the control module 6 coordinates the actions of each mechanism to achieve comprehensive testing of motor performance.

[0022] exist Figure 1-6The motor fixing mechanism includes a fixing seat 8, a buffer spring 9, and a hydraulic damper 10. The fixing seat 8 is fixedly installed on the test bench 1. Four guide columns 29 are fixedly connected to the fixing seat 8. A slider 11 is slidably installed on the outside of each of the four guide columns 29. A motor mounting plate 28 is fixedly connected to the slider 11 for installing the motor 2 to be tested. The buffer spring 9 and the hydraulic damper 10 are arranged in parallel on the outside of the guide columns, and the buffer spring 9 and the hydraulic damper 10 are arranged between the slider 11 and the fixing seat 8.

[0023] This motor testing fixture, firstly, has a fixed base 8 that provides a stable foundation for the entire mechanism through its fixed installation with the test bench 1, ensuring that the motor will not experience overall displacement during testing and guaranteeing the stability of the test benchmark. Secondly, the four guide posts 29 provide precise guidance and constraint for the movement of the slider 11, preventing it from shifting or wobbling under force, thus ensuring the accuracy of the motor's installation position. Thirdly, the slider 11 is fixedly connected to the motor mounting plate 28 and can slide flexibly along the guide posts 29. The buffer spring 9 and hydraulic damper 10, arranged in parallel outside the guide posts 29 and located between the slider 11 and the fixed base 8, form a highly efficient... The combined vibration damping system consists of a buffer spring 9 that can quickly absorb high-frequency, small-amplitude vibrations generated during motor operation or testing, reducing vibration impact through its own elastic deformation; and a hydraulic damper 10 that can slowly dissipate vibration energy by utilizing liquid damping, effectively suppressing the reciprocating oscillation of the slider 11 caused by the rebound of the buffer spring 9, avoiding resonance, and further improving the vibration damping effect. This design not only significantly reduces the damage of vibration to the motor's own structure and reduces the interference of vibration on the accuracy of motor performance parameter detection during testing, but also protects the test bench 1 from the effects of continuous vibration, extends the service life of the entire test equipment, and ensures the stability and reliability of motor testing.

[0024] exist Figure 1-6 In the middle: the motor fixing mechanism also includes two fixing mounting plates 12, which are symmetrically fixedly mounted on the fixing base 8. A cylinder 27 is detachably mounted on the fixing mounting plate 12, and a fixing plate 13 is fixedly connected to the output end of the cylinder 27. An anti-slip plate 14 is glued to the fixing plate 13.

[0025] This motor testing fixture, firstly, has two symmetrical mounting plates 12 fixed on the fixed base 8, providing a stable and symmetrical mounting foundation for the cylinder 27. This ensures that the driving force of the cylinder 27 can be evenly applied to both sides of the motor 2 under test, avoiding displacement of the motor 2 due to unilateral force. The cylinder 27 adopts a detachable installation design, which facilitates flexible adjustment of the position of the cylinder 27 or replacement with a cylinder 27 of suitable specifications according to the size of different models of the motor 2 under test, improving the adaptability of the mechanism to different motors 2 under test, and also facilitates the later maintenance and replacement of the cylinder 27. Secondly, the fixed plate 13 connected to the output end of the cylinder 27 can achieve telescopic movement under the drive of the cylinder 27, which can be adjusted according to... The actual width of the motor under test 2 automatically adjusts the clamping distance, quickly completing the clamping and releasing operations of the motor under test 2, greatly simplifying the clamping process and improving test preparation efficiency; while the anti-slip plate 14 bonded to the fixing plate 13 increases the friction with the surface of the motor under test 2, effectively preventing the motor under test 2 from sliding or rotating during the test due to vibration, torque or fluctuations in the clamping force of the cylinder 27, further strengthening the stability of the fixation. Combined with the original shock absorption and buffer system, it not only ensures that the position of the motor under test 2 is always accurate during the test, but also avoids test data deviation or structural damage caused by the sliding of the motor under test 2, comprehensively improving the safety and reliability of the test process.

[0026] exist Figure 1-6 The torque testing mechanism includes a torque testing mounting plate 15 and a torque sensor 16. The torque testing mounting plate 15 is fixedly mounted on the test bench 1, and the torque sensor 16 is detachably mounted on the torque testing mounting plate 15.

[0027] This motor testing fixture features a torque testing mounting plate 15 fixedly mounted on the test bench 1. This provides a robust and stable mounting reference for the entire torque testing system, preventing misalignment between the torque sensor 16 and the output of the motor 2 under test due to displacement of the mounting plate 15 during testing. This ensures a stable torque transmission path and guarantees the reliability of test data from a fundamental perspective. Simultaneously, the fixed mounting structure can withstand the torque reaction force generated during motor testing, preventing the mechanism from being affected by shaking due to force and thus improving testing accuracy. Furthermore, the torque sensor 16 is detachably mounted on the torque testing mounting plate 15. This allows for quick replacement of the appropriate torque sensor 16 according to the torque testing requirements of different motor models, significantly improving the flexibility of the mechanism for adapting to different motor testing scenarios without requiring a separate test platform for a specific motor. The detachable design facilitates daily calibration, maintenance, and repair of the torque sensor 16, ensuring the sensor remains in a precise measurement state for extended periods, preventing data distortion due to sensor accuracy degradation, reducing maintenance difficulty, minimizing equipment downtime, and ensuring efficient and accurate motor torque testing.

[0028] exist Figure 1-6In the middle: the compensating coupling 7 has a built-in universal joint structure.

[0029] This motor testing fixture addresses the issue that, even when the motor fixing mechanism and torque testing mounting plate 15 are fixed during motor torque testing, factors such as installation accuracy errors, minor vibrations during motor operation, or thermal deformation can still cause coaxiality deviations between the output shaft of the motor under test 2 and the input shaft of the torque sensor 16. The universal joint structure, with its multi-directional angular compensation capability, can flexibly adapt to these coaxiality deviations. When there is an angular deviation between the two shafts, the universal joint's cross shaft can smoothly transmit the torque output by the motor under test 2 to the torque sensor 16 through rotation around its own axis, avoiding additional radial force, axial force, or additional torque due to shaft misalignment. Simultaneously, its structural characteristics can absorb axial movement to a certain extent, reducing rigid impact between shafts. This design not only ensures a smooth torque transmission path and avoids distortion of torque test data caused by deviations, but also effectively alleviates the stress caused by misalignment, reducing wear on the output shaft of the motor under test 2, the interface of the torque sensor 16, and the compensating coupling 7, extending the equipment's service life and providing crucial assurance for the accuracy and stability of motor torque testing.

[0030] exist Figure 1-6 In the middle: the speed testing mechanism includes a slide rod 17, which is fixedly installed in the test platform 1 through a slide groove. A locking slider 18 is slidably connected to the outside of the slide rod 17. A connecting column 19 is fixedly connected to the locking slider 18. A support plate 20 is fixedly connected to the end of the connecting column 19 away from the locking slider 18. A speed testing mounting plate 21 is fixedly connected to the support plate 20. A speed testing sensor 22 is detachably installed on the speed testing mounting plate 21.

[0031] This motor testing fixture features a sliding rod 17 fixedly mounted via a pre-set groove on the test bench 1. This provides a stable mounting foundation for the entire speed testing assembly and, with the guidance of the groove, ensures a clear movement trajectory for subsequent sliding adjustment components, preventing deviation during adjustment. The locking slider 18, externally connected to the sliding rod 17, can be flexibly adjusted along the rod 17. This, in turn, drives the support plate 20 and the speed testing mounting plate 21 to move synchronously via the connecting column 19. This design allows for precise adjustment of the relative position between the speed testing sensor 22 and the output end of the motor 2 under test, based on differences in the height and position of the output shaft. This ensures that the speed testing sensor 22 is accurately aligned with the speed detection point of the motor 2 under test, resolving the issue of detection errors caused by size differences between different motor models. To address the issue of mismatched measurement positions, the locking slider 18 can be locked in place after adjustment to the appropriate position, preventing the speed test sensor 22 from shifting due to vibration or other factors during testing, thus ensuring the stability of the detection distance and angle during the test. Furthermore, the speed test sensor 22 is detachably mounted on the mounting plate. This allows for the replacement of different types or ranges of speed test sensors 22 according to the motor speed range and detection accuracy requirements, significantly improving the adaptability of the mechanism to different testing scenarios. It also facilitates the calibration, maintenance, and replacement of the speed test sensor 22, ensuring it remains in a precise detection state and preventing speed data distortion due to performance issues with the speed test sensor 22. Ultimately, this provides comprehensive assurance for the flexibility, stability, and accuracy of motor speed testing.

[0032] exist Figure 1-6 In the middle: Auxiliary moving rings 23 are fixedly connected to both sides of the speed test mounting plate 21.

[0033] This motor testing fixture features auxiliary moving rings 23 fixedly connected to both sides of the speed testing mounting plate 21. These rings primarily provide convenient operating points and stability for adjusting the position of the speed testing mounting plate 21, further optimizing the adjustment efficiency and safety of the speed testing mechanism. When adjusting the position of the speed testing sensor 22, the operator can apply force by gripping the auxiliary moving rings 23 on both sides, causing the locking slider 18 to slide smoothly along the slide rod 17. Compared to directly pushing the speed testing mounting plate 21 or the speed testing sensor 22, this design avoids interference between the hand and components such as the speed testing sensor 22 and the connecting column 19, while also ensuring more even force application and effectively preventing over-adjustment. During the process, the speed test mounting plate 21 may tilt or jam due to uneven force. This ensures that the speed test sensor 22 always moves along the preset trajectory and accurately aligns with the motor speed detection point. In addition, the auxiliary moving ring 23 can also provide temporary support points for operators after the speed test mounting plate 21 is adjusted into place, making it easier to confirm whether the position of the speed test sensor 22 is accurate, or to complete the locking operation in conjunction with the locking slider 18. This reduces the risk of bumps and contamination caused by direct hand contact with the speed test sensor 22, protecting the precision speed test sensor 22 and improving the operational safety and convenience of the entire adjustment process. It effectively complements the flexible adjustment and stable testing requirements of the mechanism.

[0034] exist Figure 1-6 In the middle: A finger groove is provided on the auxiliary moving ring 23, and anti-slip texture is provided in the finger groove.

[0035] This motor testing fixture features a finger groove design that conforms to the natural curvature and grip posture of the operator's fingers, allowing the fingers to be stably embedded within the groove. This prevents slippage and displacement of the fingers due to the lack of a positioning structure, while also distributing hand pressure, reducing hand fatigue during prolonged or repeated adjustments, and improving operational comfort. Compared to a smooth ring surface, the finger groove provides a clear point of force application for the fingers, making it easier for the operator to control the direction and intensity of force. This further prevents the speed test mounting plate 21 from tilting or jamming due to force deviation, ensuring that the speed test sensor 22 moves accurately along the trajectory of the slide bar 17. Furthermore, the anti-slip texture within the groove increases the grip width and movement... The friction of the ring contact surface effectively prevents relative slippage between the fingers and the finger groove, even when the hands are slightly sweaty or have a small amount of oil. This ensures that the power is stably transmitted to the moving ring when force is applied, avoiding loss of control of the adjustment action due to slippage, and thus preventing accidental collision between the speed test sensor 22 and the motor components. At the same time, the anti-slip texture also indirectly improves the stability when temporarily supporting the speed test mounting plate 21, making it easier for operators to more accurately confirm the position of the speed test sensor 22 and complete the locking operation. This comprehensively enhances the operability and safety of the auxiliary moving ring 23, and is deeply adapted to the flexible adjustment and stable testing requirements of the overall speed test mechanism.

[0036] exist Figure 1-6In the middle: A laser centering emitter 24 is detachably mounted on the rotation speed test mounting plate 21.

[0037] This motor testing fixture features a laser alignment emitter 24 that emits a precise laser beam, transforming an abstract alignment reference into a clearly visible light spot. Operators can quickly determine whether the detection end of the speed test sensor 22 is aligned with the target detection point of the motor under test 2 or within a preset detection range without relying on visual estimation or repeated calibration with auxiliary measuring tools. This effectively avoids problems such as signal loss and inaccurate speed data caused by visual alignment errors. Especially in scenarios where the motor detection point is concealed or high-precision testing is required, it significantly reduces the difficulty of alignment operations and shortens test preparation time. Furthermore, its detachable installation design allows for flexible assembly and disassembly according to testing needs. When high-precision alignment is not required or different types of speed test sensors 22 need to be replaced, the laser alignment transmitter 24 can be removed to avoid interference. If it is necessary to adapt to different motor models or adjust the detection angle, the installation position of the laser alignment transmitter 24 can be easily adjusted or a laser alignment transmitter 24 of the appropriate specification can be replaced, further improving the scene adaptability of the speed test mechanism. In addition, the addition of the laser alignment transmitter 24 can work in conjunction with the convenient adjustment function of the auxiliary moving ring 23. The operator can observe the adjustment effect in real time through the laser spot and quickly and accurately position the speed test sensor 22 to the optimal detection position, fully ensuring the accuracy of speed test data and the efficiency of the test process.

[0038] exist Figure 1-6 In the middle: The bottom of the test bench 1 is fixedly connected to four support columns, and the bottom of each of the four support columns is fixedly connected to a shock-absorbing pad 26.

[0039] This motor testing fixture features four symmetrically fixed support columns, which evenly distribute the total weight of the test platform 1 and its components, including the motor mounting mechanism, torque testing mechanism, and speed testing mechanism. This prevents the test platform 1 from tilting or deforming due to uneven stress, providing a horizontal and stable installation benchmark for various testing equipment. This indirectly ensures the alignment of components and the accuracy of test data during motor testing. Simultaneously, the height design of the support columns keeps the test platform 1 at a reasonable height for easy operation, improving the convenience of the testing process. Furthermore, the vibration damping pads 26 at the bottom of the support columns play a crucial role in shock absorption and buffering: on the one hand, they absorb external vibrations transmitted from the ground to the test platform 1, preventing external vibrations from interfering with the motor's operation or affecting the detection accuracy of the torque and speed testing sensors 22; on the other hand, they weaken the transmission of vibrations generated by the motor itself to the ground during testing, reducing the impact on surrounding equipment. They also prevent rigid vibrations from causing long-term wear on the bottom of the test platform 1 and the ground. This design enhances the overall stability of the test platform 1 and extends the service life of the testing equipment and ground structure through shock absorption protection, providing a reliable guarantee for the long-term stable operation of motor testing.

[0040] In this embodiment, the speed test sensor 22, cylinder 27, and compensating coupling 7 are all commercially available devices known to those skilled in the art. They can be customized or selected according to actual needs. Here, we are only using them without making any structural or functional improvements, so we will not go into detail here. The speed test sensor 22 and cylinder 27 are all equipped with matching control switches. The installation position of the control switches is selected according to actual usage needs to facilitate operation and control by the operator. The technology is already very mature and can be implemented.

[0041] The implementation principle of the motor testing fixture in this embodiment is as follows: During testing, the motor 2 to be tested is first placed on the motor mounting plate 28 of the motor fixing mechanism. The cylinder 27 is started by the control module 6 to drive the fixing plates 13 and anti-slip plates 14 on both sides to move, firmly clamping the motor 2 to be tested. Then, the speed testing mechanism is manually adjusted: the locking slider 18 is loosened, and the speed testing mounting plate 21 is pushed along the slide bar 17 by holding the auxiliary moving ring 23 with anti-slip groove. At the same time, the laser centering emitter 24 is turned on to align the beam with the detection point on the output shaft of the motor 2 to be tested. After precise positioning, the slider 18 is locked to ensure that the speed testing sensor 22 is in the optimal detection position. After the motor 2 starts, its output torque is smoothly transmitted to the torque sensor 16 through the compensated coupling 7 with built-in universal joint, effectively eliminating the measurement error and additional stress caused by the installation alignment error. The vibration of the motor 2 under test during operation is effectively absorbed and suppressed by the buffer spring 9 and hydraulic damper 10 connected in parallel in the motor fixing mechanism, which greatly reduces the impact of vibration on the test accuracy and equipment life. At the same time, the voltage test mechanism 3 and the current test mechanism 4 monitor the input electrical parameters of the motor 2 under test in real time. Multiple signals such as speed, torque, voltage and current are transmitted to the data acquisition and display module 5 for centralized processing and real-time display, and the entire test process is coordinated by the control module 6.

Claims

1. A motor testing fixture, characterized in that, include: Test bench (1), motor fixing mechanism, motor to be tested (2), speed testing mechanism, torque testing mechanism, voltage testing mechanism (3), current testing mechanism (4), data acquisition and display module (5), and control module (6); The motor fixing mechanism, speed testing mechanism, torque testing mechanism, and data acquisition and display module (5) are all set on the upper surface of the test bench (1), and the control module (6) is set on one side of the test bench (1). The motor to be tested (2) is fixed on the motor fixing mechanism, and its output shaft is detachably connected to the input end of the torque testing mechanism through a compensating coupling (7). The detection end of the speed testing mechanism faces the output shaft of the motor to be tested (2). The voltage testing mechanism (3) is connected to the power input terminal of the motor under test (2) via a wire, and the current testing mechanism (4) is connected in series in the power circuit of the motor under test (2); The signal input terminal of the data acquisition and display module (5) is connected to the signal output terminals of the speed testing mechanism, torque testing mechanism, voltage testing mechanism (3), and current testing mechanism (4), respectively. The data acquisition and display module (5) is connected to the control module (6). The output of the control module (6) is connected to the control input of the motor fixing mechanism, the speed testing mechanism, the torque testing mechanism, the voltage testing mechanism (3), the current testing mechanism (4), and the data acquisition and display module (5).

2. The motor testing fixture according to claim 1, characterized in that: The motor fixing mechanism includes a fixing seat (8), a buffer spring (9), and a hydraulic damper (10). The fixing seat (8) is fixedly installed on the test bench (1). Four guide columns (29) are fixedly connected to the fixing seat (8). A slider (11) is slidably arranged on the outside of each of the four guide columns (29). A motor mounting plate (28) is fixedly connected to the slider (11) for installing the motor (2) to be tested. The buffer spring (9) and the hydraulic damper (10) are arranged in parallel on the outside of the guide columns, and the buffer spring (9) and the hydraulic damper (10) are arranged between the slider (11) and the fixing seat (8).

3. The motor testing fixture according to claim 2, characterized in that: The motor fixing mechanism also includes two fixing mounting plates (12), which are symmetrically fixedly mounted on the fixing base (8). A cylinder (27) is detachably mounted on the fixing mounting plate (12), and a fixing plate (13) is fixedly connected to the output end of the cylinder (27). An anti-slip plate (14) is adhered to the fixing plate (13).

4. The motor testing fixture according to claim 1, characterized in that: The torque testing mechanism includes a torque testing mounting plate (15) and a torque sensor (16). The torque testing mounting plate (15) is fixedly mounted on the test bench (1), and the torque sensor (16) is detachably mounted on the torque testing mounting plate (15).

5. The motor testing fixture according to claim 1, characterized in that: The compensating coupling (7) has a built-in universal joint structure.

6. The motor testing fixture according to claim 1, characterized in that: The rotational speed testing mechanism includes a slide bar (17), which is fixedly installed in the test bench (1) through a groove. A locking slider (18) is slidably connected to the outside of the slide bar (17). A connecting column (19) is fixedly connected to the locking slider (18). A support plate (20) is fixedly connected to the end of the connecting column (19) away from the locking slider (18). A rotational speed testing mounting plate (21) is fixedly connected to the support plate (20). A rotational speed testing sensor (22) is detachably installed on the rotational speed testing mounting plate (21).

7. The motor testing fixture according to claim 6, characterized in that: Both sides of the speed test mounting plate (21) are fixedly connected with auxiliary moving rings (23).

8. The motor testing fixture according to claim 7, characterized in that: The auxiliary moving ring (23) has a finger groove, and the finger groove is provided with anti-slip texture.

9. A motor testing fixture according to claim 6, characterized in that: A laser centering emitter (24) is detachably mounted on the rotation speed test mounting plate (21).

10. The motor testing fixture according to claim 1, characterized in that: The bottom of the test bench (1) is fixedly connected to four support columns, and the bottom of each of the four support columns is fixedly connected to a shock-absorbing pad (26).

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