Limited angle torque motor anti-rotation torque automatic test device and test method

Abstract

The invention discloses a limited angle torque motor anti-rotation torque automatic test device and test method, and belongs to the field of motor test, the device comprises a limited angle torque motor, a first coupling, a torque sensor, a second coupling, a clutch, a third coupling, an AC servo motor and a terminal device; the output end of the limited angle torque motor is connected with one end of the torque sensor through a first coupler, the other end of the torque sensor is connected with the clutch through a second coupler, the clutch is connected with the alternating current servo motor through a third coupler, and the terminal equipment is connected with the torque sensor. According to the invention, the problem of low testing efficiency of the anti-rotation torque of the limited angle torque motor in the prior art can be solved.

Description

Technical Field

[0001] The invention belongs to the field of motor testing, and in particular relates to an automatic testing device and a testing method for the anti-rotation torque of a limited-angle torque motor. Background Art

[0002] Limited-angle torque motors are widely used in key areas such as robot joint drive, precision medical equipment, aerospace control and automotive steering systems because they can provide accurate and stable torque output within a limited angle range. As the performance requirements for limited-angle torque motors continue to increase, the anti-rotational torque of limited-angle torque motors has become one of the important indicators to measure their performance. The anti-rotational torque capability is directly related to the stability and reliability of the motor when subjected to external reverse torque, and is a key factor in ensuring the precise operation and long-term safety of the system.

[0003] However, traditional anti-torque test methods often rely on manual operation and manual measurement, which is not only inefficient but also easily affected by human factors, making it difficult to ensure the consistency and accuracy of the test results. In addition, in the face of growing market demand and the pressure of mass production, traditional testing methods can no longer meet the needs of efficient and accurate testing, which seriously restricts the further improvement of production efficiency and product quality. Summary of the invention

[0004] The object of the present invention is to provide an automatic test device and method for the anti-rotational torque of a limited angle torque motor, so as to solve the problem of low test efficiency of the anti-rotational torque of the limited angle torque motor in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In the first aspect, a limited angle torque motor anti-rotation torque automatic test device comprises: a limited angle torque motor, a first coupling, a torque sensor, a second coupling, a clutch, a third coupling, an AC servo motor and a terminal device; the output end of the limited angle torque motor is connected to one end of the torque sensor through the first coupling, the other end of the torque sensor is connected to the clutch through the second coupling, the clutch is connected to the AC servo motor through the third coupling, and the terminal device is connected to the torque sensor. When in use, the programmable power supply applies current to the limited angle torque motor, and the limited angle torque motor rotates to the corresponding angle value under the current and stays for a preset time. The clutch is attracted to connect the shaft of the limited angle torque motor and the AC servo motor, the torque sensor is reset, the AC servo motor rotates in the reverse direction and drives the limited angle torque motor to rotate in the reverse direction. At this time, the torque sensor collects the torque value of the limited angle torque motor resisting the reverse rotation and outputs it to the terminal device.

[0006] In some embodiments, a base is further included, and the limited angle torque motor, the torque sensor, the clutch and the AC servo motor are installed on the base.

[0007] In some embodiments, it also includes a first mounting plate, a second mounting plate, a third mounting plate and a fourth mounting plate; the first mounting plate, the second mounting plate, the third mounting plate and the fourth mounting plate are all vertically mounted on the base, the limited angle torque motor is mounted on the first mounting plate, the torque sensor is mounted on the second mounting plate, the clutch is mounted on the third mounting plate, and the AC servo motor is mounted on the fourth mounting plate.

[0008] In some embodiments, it also includes a sleeve and a dummy shaft, the clutch is mounted on the third mounting plate through the sleeve, the clutch is mounted on the third mounting plate through the sleeve, the dummy shaft is mounted on the clutch, the clutch is connected to the second coupling through one end of the dummy shaft, and the clutch is connected to the third coupling through the other end of the dummy shaft.

[0009] In some embodiments, a bottom plate is further included, and grooves are provided on the bottom plate and the base, the bottom plate is fixed to the base through the grooves, and the first mounting plate, the second mounting plate, the third mounting plate and the fourth mounting plate are fixed to the bottom plate through the grooves.

[0010] In some embodiments, the limited angle torque motor, the torque sensor, and the AC servo motor are of equal coaxiality.

[0011] In some embodiments, it also includes a programmable power supply, a power analyzer and a printer. The programmable power supply is connected to a terminal device. When in use, the terminal device controls the programmable power supply to provide different currents to the limited angle torque motor. The power analyzer and the printer are connected to the terminal device.

[0012] In a second aspect, a method for automatically testing the anti-rotation torque of a limited angle torque motor comprises the following steps: Adjust the limited angle torque motor to zero position; The terminal device controls the current to be input to the limited angle torque motor, and the shaft of the limited angle torque motor drives the shaft of the torque sensor to rotate to the deflection angle value corresponding to the current, and waits for a preset time. The clutch is engaged, and the AC servo motor drives the limited angle torque motor to rotate in the reverse direction at a preset deviation angle. At this time, the torque sensor outputs the anti-rotation torque value to the terminal device, and then the clutch is cut off.

[0013] In some implementations, the preset time is 2 seconds, and the preset deviation angle is 0.5°.

[0014] In some embodiments, in the step of the AC servo motor driving the limited angle torque motor to rotate in the reverse direction at a preset deviation angle, the AC servo motor is installed with a reducer to drive the limited angle torque motor to rotate in the reverse direction.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an automatic test device for the anti-rotation torque of a limited-angle torque motor, wherein the output end of the limited-angle torque motor is connected to one end of a torque sensor through a first coupling, the other end of the torque sensor is connected to a clutch through a second coupling, the clutch is connected to an AC servo motor through a third coupling, and the terminal device is connected to the torque sensor. The device is controlled by the terminal device to realize automation of the test process, which can greatly improve the test efficiency and accuracy; the torque value resisted by the limited-angle torque motor when it rotates in the reverse direction is collected in real time by a torque sensor, and directly output to the terminal device, which can accurately measure the anti-rotation torque of the motor to meet the high-precision test requirements; during the test process, the clutch is engaged and switched to realize effective control of the limited-angle torque motor and the AC servo motor, avoiding equipment damage or personal injury caused by misoperation or failure. The present invention only needs to replace the limited-angle torque motor during testing, which greatly improves the test efficiency.

[0016] Furthermore, the present invention can ensure the coaxiality and stability of the limited angle torque motor, the torque sensor and the AC servo motor through the design of the mounting plate, the base and the sleeve, thereby reducing errors and vibrations during the test process.

[0017] The present invention also provides a method for automatically testing the anti-rotation torque of a limited-angle torque motor, comprising the following steps: adjusting the limited-angle torque motor to zero position; the terminal device controls the current input to the limited-angle torque motor, the shaft of the limited-angle torque motor drives the shaft of the torque sensor to rotate to the deflection angle value corresponding to the current, after waiting for a preset time, the clutch is engaged, and the AC servo motor drives the limited-angle torque motor to rotate in the opposite direction to a preset deviation angle, at which time the torque sensor outputs the anti-rotation torque value to the terminal device, and then the clutch is cut off. This method only requires one-button testing, is easy to operate, and has direct torque reading. It only takes 16 seconds to test a limited-angle torque motor, which greatly improves the test efficiency, and this method can be used in the testing of various performance parameters such as holding torque and zero-position torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of an automatic test device for the anti-rotation torque of a limited-angle torque motor provided in this embodiment; Figure 2 A connection diagram of a terminal device used in this embodiment; Figure 3This is a diagram of the human-computer interaction interface of the test software used in this embodiment.

[0019] In the figure, 1. limited angle torque motor; 2. first coupling; 3. torque sensor; 4. second coupling; 5. clutch; 6. third coupling; 7. AC servo motor; 8. first mounting plate; 9. second mounting plate; 10. third mounting plate; 11. fourth mounting plate; 12. base; 13. sleeve; 14. dummy shaft. DETAILED DESCRIPTION

[0020] In the following, only certain exemplary embodiments are briefly described, and the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0021] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] like Figure 1As shown, this embodiment provides a limited angle torque motor anti-rotation torque automatic test device, including: a limited angle torque motor 1, a first coupling 2, a torque sensor 3, a second coupling 4, a clutch 5, a third coupling 6, an AC servo motor 7, a base 12, a first mounting plate 8, a second mounting plate 9, a third mounting plate 10, a fourth mounting plate 11, a sleeve 13, a dummy shaft 14 and a terminal device; The output end of the limited angle torque motor 1 is connected to one end of the torque sensor 3 through the first coupling 2, and the other end of the torque sensor 3 is connected to the clutch 5 through the second coupling 4. The clutch 5 is connected to the AC servo motor 7 through the third coupling 6. The terminal device is connected to the torque sensor 3. When in use, the programmable power supply applies current to the limited angle torque motor 1, and the limited angle torque motor 1 rotates to the corresponding angle value under the current and stays for a preset time. The clutch 5 is attracted to connect the shaft of the limited angle torque motor 1 and the AC servo motor 7, the torque sensor 3 is reset, and the AC servo motor 7 rotates in the reverse direction and drives the limited angle torque motor 1 to rotate in the reverse direction. At this time, the torque sensor 3 collects the torque value of the limited angle torque motor 1 resisting the reverse rotation and outputs it to the terminal device. The terminal device uses a computer.

[0026] The limited angle torque motor 1, the torque sensor 3, the clutch 5 and the AC servo motor 7 are mounted on the base 12. The first mounting plate 8, the second mounting plate 9, the third mounting plate 10 and the fourth mounting plate 11 are all vertically mounted on the base 12. The limited angle torque motor 1 is mounted on the first mounting plate 8, the torque sensor 3 is mounted on the second mounting plate 9, the clutch 5 is mounted on the third mounting plate 10, and the AC servo motor 7 is mounted on the fourth mounting plate 11.

[0027] The clutch 5 is mounted on the third mounting plate 10 through the sleeve 13 , the dummy shaft 14 is mounted on the clutch 5 , the clutch 5 is connected to the second coupling 4 through one end of the dummy shaft 14 , and the clutch 5 is connected to the third coupling 6 through the other end of the dummy shaft 14 .

[0028] It also includes a bottom plate, with a total of 4 bottom plates. Grooves are set on the bottom plate and the base 12. The bottom plate is fixed to the base 12 through the grooves. The first mounting plate 8, the second mounting plate 9, the third mounting plate 10 and the fourth mounting plate 11 are respectively fixed to different bottom plates through grooves.

[0029] The coaxiality of the limited-angle torque motor 1 , the torque sensor 3 and the AC servo motor 7 is equal.

[0030] like Figure 2As shown, it also includes a programmable power supply, a power analyzer, an AC servo controller and a printer. The programmable power supply is connected to a terminal device. When in use, the terminal device controls the programmable power supply to provide different currents to the limited angle torque motor. The power analyzer and the printer are connected to the terminal device.

[0031] This embodiment also provides a method for automatically testing the anti-rotation torque of a limited angle torque motor. The limited angle torque motor 1 is used in aircraft valve control. When powered on, the motor shaft rotates to a certain angle value, that is, the angle value at which the valve is opened. However, in actual dynamic use, it will definitely be impacted by some external forces. The torque that the motor can withstand under the deflection angle limit is measured, that is, the anti-rotation torque of the motor. The torque of the limited angle torque motor is measured when the shaft is just pulled to the deviation angle θ when the motor is powered on. This torque is the anti-rotation torque of the limited angle torque motor. The deviation angle θ (this angle generally does not exceed 10% of the maximum angle) is determined based on the maximum angle value of the motor's limited angle torque motor and the valve usage accuracy.

[0032] The anti-rotation torque of a limited angle torque motor refers to applying current to the motor, when the rotor rotates to the angular position under the corresponding current, applying torque in the zero direction using the wire wheel method or other equivalent methods, and measuring the torque value when the shaft deviates from the corresponding angle θ. The following demonstrates the test steps for a limited angle torque motor with a deviation angle of 0.5°: The test principle of the method is as follows: use labview to make a host computer software, and write a test program according to the requirements of the anti-rotation torque test of the limited angle torque motor. The clutch 5 is cut off, and the host computer software controls the programmable power supply to apply current to the limited angle torque motor 1, and the motor shaft rotates to the angle value under the corresponding current; the clutch 5 is engaged, the torque sensor 3 is cleared, and the host computer software sets the deviation angle θ for the AC servo motor 7. The AC servo motor 7 drags the limited angle torque motor 1 to rotate in the opposite direction at the deviation angle θ. At this time, the torque sensor 3 outputs the torque value. This is a test point anti-rotation torque test. After the test program is completed, an Excel table is automatically generated according to the requirements of the limited angle torque motor anti-rotation torque test project, and it is saved and printed.

[0033] The method specifically comprises the following steps: (1) Use LabVIEW to create a host computer software, the software programming interface is as follows Figure 3 As shown. It is divided into manual mode and automatic mode: manual mode is suitable for single-point testing; automatic mode is suitable for multi-point testing. Set the test program according to the requirements, complete the automatic test, automatically sample and extract data, and print records.

[0034] (2) The programmable power supply, power analyzer, torque sensor, AC servo motor controller, and printer are connected to the computer through the RS232 interface to achieve data transmission and data collection.

[0035] (3) The upper computer software is set up, and the program-controlled power supply applies 0mA, 50mA, 100mA, 150mA, 200mA, and 250mA to the limited angle torque motor 1 in sequence. When 0mA, the clutch 5 is disengaged, and the upper computer software controls the program-controlled power supply to apply current to the limited angle torque motor 1. The motor shaft rotates to the angle value under the corresponding current and stays for 2 seconds; the clutch 5 is engaged, and the torque sensor 3 is cleared. The upper computer software sets 0.5° for the AC servo motor 7. The AC servo motor 7 reversely drags the limited angle torque motor 1 to rotate in the opposite direction by 0.5°. At this time, the torque sensor 3 outputs the torque value and stays for 5 seconds to collect data. At this time, the data is the anti-rotation torque of 0mA. Then, the anti-rotation torque test of 50mA, 100mA, 150mA, 200mA, and 250mA is carried out. After the test, the data is saved.

[0036] (4) The first mounting plate 8, the second mounting plate 9, the third mounting plate 10 and the fourth mounting plate 11 are vertically mounted on the base 12; grooves are provided on the base 12 and the four bottom plates to ensure the coaxiality of the AC servo motor 7, the torque sensor 3 and the limited angle torque motor 1, and to prevent the motor from stalling due to installation deviation, which may lead to deviation in the test data.

[0037] (5) The limited angle torque motor 1 is mounted on the first mounting plate 8, the torque sensor 3 is mounted on the second mounting plate 9, the clutch 5 is mounted on the third mounting plate 10 through the sleeve 13, and the AC servo motor 7 is mounted on the fourth mounting plate 11. The limited angle torque motor 1 is connected to the torque sensor 3 through the first coupling 2, the other end of the torque sensor 3 is connected to the dummy shaft 14 of the clutch 5 through the second coupling 4, and the dummy shaft 14 is connected to the AC servo motor 7 through the third coupling 6, and the AC servo motor is connected to a dedicated AC servo controller.

[0038] The limited angle torque motor 1 is not powered, and the motor is adjusted to the zero position according to the zero position mark and installed on the first mounting plate 8. Since the AC servo motor 7 is given an enable and the motor shaft is locked, the clutch 5 is cut off at the beginning of each current point test. The host computer software is opened to call the test program of the anti-rotation torque of the corresponding motor model, and the limited angle torque motor 1 starts testing. At 0mA, the clutch 5 is energized, the torque sensor 3 is reset, the AC servo motor 7 drags the limited angle torque motor 1 to reverse 0.5°, the torque sensor 3 outputs the torque value, and after waiting for 2 seconds, the data is collected and the clutch 5 is disconnected; the upper computer software controls the programmable power supply to apply 50mA current to the limited angle torque motor 1, and the shaft of the limited angle torque motor 1 drives the shaft of the torque sensor 3 to rotate to the deflection angle value under the 50mA current, waits for 2 seconds, the clutch 5 is energized, the AC servo motor 7 drags the limited angle torque motor 1 to reverse 0.5°, the torque sensor 3 outputs the torque value, and after waiting for 2 seconds, the data is collected and the clutch 5 is disconnected; according to the above test process, 100mA, 150mA, 200mA, and 250mA tests are carried out in sequence, and the test data is saved after the test is completed.

[0039] If the test accuracy of the AC servo motor 7 does not meet the test requirements, for example, when measuring a deviation angle of 0.1°, the test accuracy of the AC servo motor 7 is 0.5°, then a reducer is installed on the AC servo motor to improve the accuracy. For example, when a reducer with a reduction ratio of 1:10 is installed, the test accuracy of the AC servo motor 7 is 0.05°, and the deviation angle can be measured to be 0.1°.

[0040] When the original test method is used, the limited angle torque motor is connected to the self-assembled machine through a rotating shaft, and the coupling is equipped with a pulley. The tester applies weights to observe the angle value displayed by the angular position indicator, measures the torque value when the shaft is just deflected by 0.5°, and continuously changes the weights to reach the required 0.5°. Then, the weights are converted into torque according to the formula. The operation is cumbersome and it takes 1 hour to test the anti-rotation torque of a motor. However, the automatic anti-rotation torque test device for the limited angle torque motor provided in this embodiment only requires one-button testing, convenient operation, and direct torque reading. It only takes 16 seconds to test a limited angle torque motor, which greatly improves the test efficiency and can be used in mass motor production.

[0041] The automatic test device provided in this embodiment, the program-controlled power supply applies current to the limited angle torque motor 1, the limited angle torque motor 1 rotates to the corresponding angle value under the current and stays for a preset time, the clutch 5 is attracted to connect the shaft of the limited angle torque motor 1 and the AC servo motor 7, the torque sensor 3 is reset, the AC servo motor 7 rotates in the reverse direction and drives the limited angle torque motor 1 to rotate in the reverse direction, at this time, the torque sensor 3 collects the torque value of the limited angle torque motor 1 resisting the reverse rotation and outputs it to the terminal device. The device is simple to operate, easy to install, has high test accuracy, short test time, and high efficiency, and can be used for testing the holding torque, zero position torque and anti-rotation torque of various types of limited angle torque motors.

[0042] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects, not exclusive, and all changes within the scope of the present invention or equivalent to the scope of the present invention are included in the present invention.

Claims

1. An automatic test device for the anti-rotation torque of a limited-angle torque motor, characterized in that: include: A limited angle torque motor (1), a first coupling (2), a torque sensor (3), a second coupling (4), a clutch (5), a third coupling (6), an AC servo motor (7), and a terminal device; The output end of the limited angle torque motor (1) is connected to one end of a torque sensor (3) via a first coupling (2); the other end of the torque sensor (3) is connected to a clutch (5) via a second coupling (4); the clutch (5) is connected to an AC servo motor (7) via a third coupling (6); the terminal device is connected to the torque sensor (3); when in use, current is applied to the limited angle torque motor (1); the limited angle torque motor (1) rotates to a corresponding angle value under the current and stays there for a preset time; the clutch (5) is attracted to connect the shaft of the limited angle torque motor (1) and the AC servo motor (7); the torque sensor (3) is reset; the AC servo motor (7) rotates in the reverse direction and drives the limited angle torque motor (1) to rotate in the reverse direction; at this time, the torque sensor (3) collects the torque value of the limited angle torque motor (1) resisting the reverse rotation and outputs it to the terminal device.

2. The automatic test device for the anti-rotation torque of a limited angle torque motor according to claim 1, characterized in that: It also includes a base (12), on which the limited-angle torque motor (1), the torque sensor (3), the clutch (5) and the AC servo motor (7) are mounted.

3. The automatic test device for the anti-rotation torque of a limited angle torque motor according to claim 2, characterized in that: It also includes a first mounting plate (8), a second mounting plate (9), a third mounting plate (10) and a fourth mounting plate (11); The first mounting plate (8), the second mounting plate (9), the third mounting plate (10) and the fourth mounting plate (11) are all vertically mounted on the base (12); the limited angle torque motor (1) is mounted on the first mounting plate (8); the torque sensor (3) is mounted on the second mounting plate (9); the clutch (5) is mounted on the third mounting plate (10); and the AC servo motor (7) is mounted on the fourth mounting plate (11).

4. The automatic test device for the anti-rotation torque of a limited angle torque motor according to claim 3, characterized in that: The clutch (5) further comprises a sleeve (13) and a dummy shaft (14); the clutch (5) is mounted on the third mounting plate (10) via the sleeve (13); the dummy shaft (14) is mounted on the clutch (5); the clutch (5) is connected to the second coupling (4) via one end of the dummy shaft (14); and the clutch (5) is connected to the third coupling (6) via the other end of the dummy shaft (14).

5. The automatic test device for the anti-rotation torque of a limited-angle torque motor according to claim 3, characterized in that: It also includes a bottom plate, wherein the bottom plate and the base (12) are both provided with grooves, the bottom plate is fixed to the base (12) via the grooves, and the first mounting plate (8), the second mounting plate (9), the third mounting plate (10) and the fourth mounting plate (11) are fixed to the bottom plate via the grooves.

6. The automatic test device for the anti-rotation torque of a limited angle torque motor according to claim 1, characterized in that: The limited-angle torque motor (1), the torque sensor (3) and the AC servo motor (7) have the same coaxiality.

7. The automatic test device for the anti-rotation torque of a limited angle torque motor according to claim 1, characterized in that: It also includes a programmable power supply, a power analyzer and a printer. The programmable power supply is connected to a terminal device. When in use, the terminal device controls the programmable power supply to provide different currents to the limited angle torque motor. The power analyzer and the printer are connected to the terminal device.

8. A method for automatically testing the anti-rotation torque of a limited-angle torque motor, characterized in that: The automatic testing device according to any one of claims 1 to 7 comprises the following steps: Adjust the limited angle torque motor (1) to zero position; The terminal device controls the current to be input into the limited angle torque motor (1), and the shaft of the limited angle torque motor (1) drives the shaft of the torque sensor (3) to rotate to a deflection angle value corresponding to the current, and after waiting for a preset time, The clutch (5) is engaged, and the AC servo motor (7) drives the limited-angle torque motor (1) to rotate in the reverse direction at a preset deviation angle. At this time, the torque sensor (3) outputs the anti-rotation torque value to the terminal device, and then the clutch (5) is disconnected.

9. The automatic testing method according to claim 8, characterized in that: The preset time is 2s, and the preset deviation angle is 0.5°.

10. The automatic testing method according to claim 8, characterized in that: In the step of driving the limited angle torque motor (1) to rotate in the reverse direction at a preset deviation angle by the AC servo motor (7), the AC servo motor (7) is installed with a reducer to drive the limited angle torque motor (1) to rotate in the reverse direction.

Images