Automatic motor demagnetization current testing equipment

Abstract

The utility model discloses automatic motor demagnetization current testing equipment, which comprises a rack, a jig trolley and a jig, an instrument placing area is arranged on the rack, and a heating furnace assembly is arranged on one side of the instrument placing area; a jig containing area is arranged in a furnace cavity of the heating furnace assembly, and a driving shaft mechanism is arranged above the jig containing area. A tested motor is arranged in the jig, and the jig comprises a jig shell and a jig mandrel; the tested motor comprises a stator and a rotor, the rotor and the jig mandrel are connected in a non-rotatable manner, and the outer side of the stator is fixedly connected with the jig shell through a holding block; the driving shaft mechanism comprises a central driving shaft, a power assembly and a lifting assembly; an electromagnetic brake is arranged in the middle of the central driving shaft, the upper end of the central driving shaft is connected with the lifting assembly through a bearing, and the lower end extends above the furnace chamber; and an electric control system, an instrument assembly and a control panel are arranged on the instrument placement area. According to the utility model, automation of motor demagnetization current testing is realized, the detection speed and precision are improved, and the detection result is accurate and reliable.

Description

Technical Field

[0001] This utility model relates to the field of automation technology, and in particular to an automated motor demagnetization current testing device. Background Technology

[0002] The core purpose of conducting a demagnetizing current test on a motor is to evaluate the motor's ability to resist external magnetic field interference under actual operating conditions, and to ensure that it will not undergo irreversible demagnetization under extreme conditions (such as high temperature, low temperature, overload current, etc.), thereby ensuring the motor's performance and reliability.

[0003] In the existing technology, the actual demagnetization current test of the motor, including positioning braking, magnetic flux measurement, demagnetization point determination, high-temperature demagnetization, and loading of the demagnetization power supply, is carried out manually on equipment and instruments at different workstations. Moreover, the test data must be recorded manually. The test process is very complicated, the test accuracy is difficult to control, the test speed is slow and it is very easy to make mistakes, which cannot meet the needs of the existing technology.

[0004] Therefore, there is an urgent need to design an automated motor demagnetization current testing device that can automatically complete the feeding and positioning of the motor under test, the determination of the demagnetization point, the loading control of the test power, temperature, demagnetization power supply and positioning power supply, as well as the detection and recording of magnetic flux in each test stage. This will automate the motor demagnetization current test, improve the testing speed and accuracy, and ensure accurate and reliable test results. Utility Model Content

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] An automated motor demagnetization current testing device includes a frame, a fixture trolley, and a fixture, characterized in that the frame is provided with an instrument placement area, and a heating furnace assembly is provided on one side of the instrument placement area;

[0007] The furnace cavity of the heating furnace assembly is provided with a fixture placement area, and a drive shaft mechanism is provided above it;

[0008] The fixture trolley is used to transfer the fixture to the fixture placement area in the furnace cavity;

[0009] The fixture contains a motor to be tested. The fixture includes a fixture housing and a fixture spindle coaxially arranged with the fixture housing.

[0010] The motor under test includes a stator and a rotor. The rotor is not rotatably connected to the fixture spindle. The stator is fixedly connected to the fixture housing by a retaining block.

[0011] The drive shaft mechanism includes a central drive shaft, a power assembly, and a lifting assembly;

[0012] An electromagnetic brake is provided in the middle of the central drive shaft. The upper end of the central drive shaft is connected to the lifting assembly through a bearing, and the lower end extends to the area above the fixture placement area of ​​the furnace cavity.

[0013] The power assembly, lifting assembly, and electromagnetic brake are fixedly connected to the heating furnace assembly. The power assembly is used to drive the central drive shaft to rotate, and the lifting assembly is used to drive the central drive shaft to connect or separate from the fixture spindle.

[0014] The instrument placement area is equipped with an electronic control system, as well as instrument components and a control panel electrically connected to the electronic control system.

[0015] The instrument components include a gaussmeter, an oscilloscope, a positioning power supply, and a demagnetizing power supply;

[0016] The tested motor, drive shaft mechanism, and electromagnetic brake are electrically connected to the electronic control system.

[0017] Preferably, the lifting assembly includes a mounting base, a support plate, a lifting plate, a guide rod, and a lifting driver;

[0018] The mounting base is connected to the top surface of the heating furnace assembly, and a support plate and a lifting plate are arranged sequentially above the mounting base;

[0019] The support plate and power component are fixedly connected to the mounting base, and an electromagnetic brake is provided between the support plate and the mounting base.

[0020] The lifting plate is slidably sleeved with the guide rod, and one end of the guide rod is fixedly connected to the support plate;

[0021] The lifting driver is fixedly installed on the upper surface of the lifting plate, and its driving end passes through the lifting plate and is provided with a floating joint.

[0022] The upper end of the central drive shaft is connected to the lifting plate via a rotating shaft, and the middle part is connected to the electromagnetic brake via a bearing.

[0023] Preferably, the power assembly includes a servo motor, a master synchronous pulley, a slave synchronous pulley, and a synchronous belt;

[0024] The servo motor is located on one side of the central drive shaft;

[0025] The main synchronous pulley and the slave synchronous pulley are located between the support plate and the mounting base. The main synchronous pulley is connected to the drive end of the servo motor, and the main synchronous pulley is connected to the slave synchronous pulley via a synchronous belt.

[0026] The synchronous pulley is connected to the central drive shaft and is located above the electromagnetic brake.

[0027] Preferably, the fixture trolley is provided with a trolley fixture bracket, and the trolley fixture bracket includes a height-adjustable connecting plate;

[0028] The upper surface of the connecting plate is provided with trolley guide rail seats facing each other on the left and right. A first guide rail guard plate is provided on the outer side of the trolley guide rail seats, a first front positioning block is provided on the front side, and a fixture docking guard plate is provided on the rear side.

[0029] A locking pin is provided on the locking hole of the first front positioning block;

[0030] The fixture is transferred to the fixture placement area in the furnace cavity via a fixture trolley and a fixture bracket.

[0031] Preferably, the fixture placement area is provided with an in-furnace fixture bracket, which includes a lower support plate;

[0032] The upper surface of the lower support plate is provided with furnace guide rail seats facing each other on the left and right, and an adjustment bracket is provided between the lower support plate and the fixture placement area.

[0033] The outer side of the furnace guide rail seat is provided with a second guide rail guard plate, the rear side is provided with a rear top block, and the front side is provided with a second front positioning baffle.

[0034] The front end of the furnace guide rail seat is connected to the rear end of the trolley guide rail seat through a fixture docking guard plate.

[0035] The second front positioning baffle is provided with a locking hole that cooperates with the locking pin;

[0036] The fixture can move back and forth on the fixture bracket inside the furnace via the furnace guide rail seat;

[0037] Both the trolley guide rail base and the furnace guide rail base are equipped with multiple guide bearings.

[0038] Preferably, the fixture housing and the fixture spindle are both provided with bearings, and the lower end face of the fixture housing is provided with a guide strip corresponding to the guide bearing.

[0039] Preferably, the end of the fixture mandrel connected to the central drive shaft is provided with a transition sleeve, and a manual handle is provided on the transition sleeve.

[0040] Preferably, the fixture trolley is also equipped with a fixture hoisting assembly.

[0041] Preferably, a protective cover is provided on the outer side of the drive shaft mechanism.

[0042] Preferably, the heating furnace assembly includes a furnace body, a furnace door is provided on the furnace opening of the furnace body, and a locking device is provided between the furnace door and the furnace body.

[0043] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0044] This invention automates the loading and positioning of the motor under test, the determination of the demagnetization point, the loading control of the test power, temperature, demagnetization power supply and positioning power supply, as well as the detection and recording of magnetic flux in each test stage. This achieves automation of motor demagnetization current testing, improves testing speed and accuracy, and ensures accurate and reliable test results. Attached Figure Description

[0045] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0046] Figure 2 This is a three-dimensional structural diagram of the platform carriage bracket of this utility model;

[0047] Figure 3 This is a three-dimensional structural diagram of the heating furnace assembly and drive shaft mechanism in this utility model;

[0048] Figure 4 This is a front view of the heating furnace assembly and drive shaft mechanism in this utility model (with the furnace door hidden);

[0049] Figure 5 This is a three-dimensional structural diagram of the furnace fixture bracket in this utility model;

[0050] Figure 6 This is a three-dimensional structural diagram of the drive shaft mechanism in this utility model;

[0051] Figure 7 This is a three-dimensional structural diagram of the fixture in this utility model;

[0052] Figure 8 This is a cross-sectional structural diagram of the fixture in this utility model;

[0053] The components include: 1. Fixture; 2. Fixture trolley; 3. Heating furnace assembly; 4. Drive shaft mechanism; 5. Motor under test; 6. Electromagnetic brake; 7. Instrument assembly; 8. In-furnace fixture bracket; 9. Trolley fixture bracket; 11. Fixture shell; 12. Fixture mandrel; 13. Clamping block; 14. Guide strip; 15. Transition sleeve; 31. Furnace body; 32. Furnace door; 33. Locking device; 41. Central drive shaft; 42. Power assembly; 43. Lifting assembly; 51. Stator; 52. Rotor; 71. Gaussmeter; 72. Oscilloscope; 73. Positioning power supply; 74. Demagnetizing power supply; 81. Lower support plate; 82. In-furnace guide rail seat; 83. Adjustment bracket; 84. Second guide rail guard plate; 85. Rear top block. 86. Front positioning baffle 2, connecting plate 91, trolley guide rail seat 92, first guide rail guard plate 93, first front positioning block 94, fixture docking guard plate 95, servo motor 421, main synchronous pulley 422, slave synchronous pulley 423, synchronous belt 424, mounting base 431, support plate 432, lifting plate 433, guide rod 434, lifting driver 435, floating joint 10, control panel 20, locking pin 30, guide bearing 40, fixture hoisting assembly 50, protective cover 60, electrical cabinet 70, positioning component 80, frame 100, fixture placement area 200, hanger 501, rope winder 502, guide wheel 504. Detailed Implementation

[0054] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0055] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," "up," "down," "front," "back," and similar expressions used in this document are for illustrative purposes only.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0057] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0058] like Figure 1-8 As shown, an automated motor demagnetization current testing device includes a frame 100, a fixture trolley 2 and a fixture 1. The frame 100 is provided with an instrument placement area, and a heating furnace assembly 3 is provided on one side of the instrument placement area.

[0059] The furnace cavity of the heating furnace assembly 3 is provided with a fixture placement area 200, and a drive shaft mechanism 4 is provided above it;

[0060] The fixture trolley 2 is used to transfer the fixture 1 into the fixture placement area 200 of the furnace cavity;

[0061] The fixture 1 is equipped with a motor 5 to be tested. The fixture 1 includes a fixture housing 11 and a fixture spindle 12 coaxially arranged with the fixture housing 11.

[0062] The motor under test 5 includes a stator 51 and a rotor 52. The rotor 52 is not rotatably connected to the fixture spindle 12. The stator 51 is fixedly connected to the fixture housing 11 by a retaining block 13.

[0063] The drive shaft mechanism 4 includes a central drive shaft 41, a power assembly 42, and a lifting assembly 43;

[0064] An electromagnetic brake 6 is provided in the middle of the central drive shaft 41. The upper end of the central drive shaft 41 is connected to the lifting assembly 43 through a bearing, and the lower end extends to the upper part of the fixture placement area 200 of the furnace cavity.

[0065] The power assembly 42, the lifting assembly 43 and the electromagnetic brake 6 are fixedly connected to the heating furnace assembly 3. The power assembly 42 is used to drive the central drive shaft 41 to rotate. The lifting assembly 43 is used to drive the central drive shaft 41 to connect or separate from the fixture spindle 12.

[0066] The instrument placement area is equipped with an electronic control system (not shown in the figure), an instrument component 7 electrically connected to the electronic control system, and a control panel 20.

[0067] The instrument component 7 includes a gaussmeter 71, an oscilloscope 72, a positioning power supply 73, and a demagnetizing power supply 74;

[0068] The tested motor 5, drive shaft mechanism 4, and electromagnetic brake 6 are electrically connected to the electronic control system.

[0069] In this embodiment, the electromagnetic brake 6 is used to limit the rotation of the central drive shaft 41, the gaussmeter 71 is used to test the magnetic flux of the motor under test 5, the oscilloscope 72 is used to monitor and display the magnetic flux, the positioning power supply 73 is used to determine the demagnetization point of the motor under test 5, and the demagnetizing power supply 74 is used to inject a demagnetizing current of a specific direction and amplitude into the coil of the stator 51.

[0070] Working principle:

[0071] Step 1: Power on, supply air, turn on the machine, select the machine type, switch to fixture 1, and reset the equipment;

[0072] Step 2: The motor 5 to be tested is installed into fixture 1, and then fixture 1 is placed into heating furnace assembly 3 by fixture trolley 2;

[0073] Step 3: After the fixture 1 is positioned in the fixture placement area 200 inside the furnace, the fixture spindle 12 is coaxially set with the central drive shaft 41. Then, the lifting assembly 43 drives the central drive shaft 41 to connect with the fixture spindle 12, and then connects the temperature probe and the power supply.

[0074] Step 3 (Actual Demagnetizing Current Test of Motor 5): This step involves detecting the change in magnetic flux of the tested motor 5 before and after exposure to high temperature and the application of a demagnetizing current to determine the magnitude of the actual demagnetizing current. This includes the following test stages:

[0075] First stage (magnetic flux A measurement): Enter the first stage through the control panel 20. The electronic control system controls the relay to connect the motor under test 5 with the gaussmeter 71 and oscilloscope 72. Then, the power assembly 42 is started to drive the rotor 52 of the motor under test 5 to rotate, generating a corresponding potential in the coil of the stator 51. The magnetic flux A is monitored and displayed by the gaussmeter 71 or oscilloscope 72. This stage can be repeated intermittently as needed.

[0076] The second stage (demagnetization point confirmation and central drive shaft 41 locking): The operator can slowly rotate the power assembly 42 to a certain position by jogging, and then release the torque of the motor 5 under test; the electronic control system controls the relay to connect the stator 51 coil of the motor 5 under test to the positioning power supply 73. The coil generates a fixed magnetic field, which attracts the permanent magnetic field of the rotor 52, holding the rotor 52 at a certain angle, thus determining the demagnetization point; then the electromagnetic brake 6 is activated to lock the central drive shaft 41 (stopping rotation), the positioning power supply 73 is disconnected from the stator 51 coil, and the demagnetization point confirmation and locking are completed. (The operator can also mark the rotation indicator turntable on the outer part of the central drive shaft 41 (upper part of the heating box) to indicate the angle position of demagnetization.)

[0077] The third stage (furnace chamber heating and heat preservation): Start the heating furnace assembly 3, and the internal circulating fan starts at the same time. Under the control of the internal PID temperature controller, the heating furnace assembly 3 quickly heats up to the set temperature and then maintains the temperature.

[0078] Fourth stage (measuring magnetic flux B after high-temperature demagnetization): Following the operation and control of the first stage, the magnetic flux B is monitored and displayed using a gaussmeter 71 and an oscilloscope 72;

[0079] Fifth stage (demagnetization point locking): This stage is similar to the second stage. The tested motor 5 rotates to the previously set angle position, stops and releases torque. The electromagnetic brake 6 is activated to lock the central drive shaft 41 (stopping rotation).

[0080] Sixth stage (demagnetization discharge): The central drive shaft 41 remains locked at the previously set demagnetization point (during this period, the rotation indicator turntable on the top can be used to confirm whether the central drive shaft 41 is loose); then the electronic control system controls the relay to connect the stator 51 coil of the motor under test 5 to the demagnetizing power supply 74. The demagnetizing current generates a corresponding magnetic field through the stator 51 coil. With the rotor 52 locked, the permanent magnetic field in the magnetic circuit system of the motor under test 5 will gradually decay; the demagnetizing discharge current is monitored by the current probe, and the signal is displayed by the amplifier; then the demagnetizing discharge continues until the set time, the demagnetizing power supply 74 is disconnected, and the next stage begins.

[0081] Seventh stage (magnetic flux C measurement): Then, the electronic control system controls the relay to connect the stator 51 coil of the motor under test 5 to the gaussmeter 71, the electromagnetic brake 6 is deactivated, the central drive shaft 41 is released, and the power assembly 42 is started to rotate, measuring the magnetic flux C of the motor under test 5. The operator calculates whether the demagnetization rate has reached the target value based on the measured data; if not, the fifth stage of cyclic operation is entered; thus, based on the measured magnetic flux A, B, and C of the motor under test 5, the magnitude of the actual demagnetization current of the motor is determined.

[0082] Phase 8: After completing the test, confirm that the motor under test 5 has stopped rotating (preferably at the same time, the torque is released), the electromagnetic brake 6 is closed, the heating furnace assembly 3 stops heating, open the heating chamber door to allow outside air to enter the furnace and be discharged from the exhaust port at the rear; when the temperature inside the furnace (including fixture 1 and the motor under test 5) gradually drops to a safe temperature or room temperature, operate the control panel 20, move the central drive shaft 41 upward to reset, leave the fixture spindle 12, unplug the plug of the stator 51 coil of the motor under test 5, and then move the fixture 1 containing the motor under test 5 from the furnace cavity to the external fixture trolley 2 to complete one test, and then sequentially enter the next actual demagnetization current test of the motor under test 5.

[0083] In summary, the automatic completion of the feeding and positioning of the tested motor 5, the determination of the demagnetization point, the loading control of the power, temperature, demagnetization power supply 74 and positioning power supply 73, and the detection and recording of magnetic flux in each test stage during the test process realizes automated motor demagnetization current testing, improves the testing speed and accuracy, and ensures accurate and reliable test results.

[0084] In this embodiment, different specifications of the motors 5 under test are adapted to corresponding fixtures 1. Before the fixtures 1 are placed into the fixture trolley 2, the motors 5 under test are installed in the fixtures 1.

[0085] Furthermore, such as Figure 3 , 4 As shown in Figures 6 and 7, the lifting assembly 43 includes a mounting base 431, a support plate 432, a lifting plate 433, a guide rod 434, and a lifting driver 435.

[0086] The mounting base 431 is connected to the top surface of the heating furnace assembly 3, and a support plate 432 and a lifting plate 433 are arranged sequentially above the mounting base 431.

[0087] The support plate 432 and the power component 42 are fixedly connected to the mounting base 431, and an electromagnetic brake 6 is provided between the support plate 432 and the mounting base 431.

[0088] The lifting plate 433 is slidably sleeved with the guide rod 434, and one end of the guide rod 434 is fixedly connected to the support plate 432.

[0089] The lifting driver 435 is fixedly mounted on the upper surface of the lifting plate 433, and its driving end passes through the lifting plate 433 and is provided with a floating joint 10.

[0090] The upper end of the central drive shaft 41 is connected to the lifting plate 433 via a rotating shaft, and the middle part is connected to the electromagnetic brake 6 via a bearing.

[0091] In this embodiment, the lifting driver 435 is activated, and the floating joint 10 at its driving end moves downward and acts on the support plate 432, thereby pushing the lifting plate 433 upward along the guide rod 434 in the opposite direction, thereby realizing the lifting of the central drive shaft 41. When the equipment is working, the lifting assembly 43 drives the central drive shaft 41 to approach the fixture 1 located in the fixture placement area 200 of the furnace cavity, so that the lower end of the central drive shaft 41 is connected to the fixture spindle 12, thereby driving the central drive shaft 41 to rotate the fixture spindle 12 through the power assembly 42, providing power to the test motor.

[0092] Furthermore, such as Figure 4 , 6 As shown, in order to achieve rotational drive of the central drive shaft 41, the power assembly 42 includes a servo motor 421, a main synchronous pulley 422, a slave synchronous pulley 423, and a synchronous belt 424;

[0093] The servo motor 421 is located on one side of the central drive shaft 41;

[0094] The main synchronous pulley 422 and the slave synchronous pulley 423 are located between the support plate 432 and the mounting base 431. The main synchronous pulley 422 is connected to the drive end of the servo motor 421, and the main synchronous pulley 422 is connected to the slave synchronous pulley 423 through the synchronous belt 424.

[0095] The timing pulley 423 is connected to the central drive shaft 41 and is located above the electromagnetic brake 6.

[0096] Furthermore, such as Figure 1 , 2 As shown in Figure 4, in order to facilitate, safely, accurately and labor-savingly transfer the fixture 1 to the fixture placement area 200 in the furnace cavity; the fixture trolley 2 is provided with a trolley fixture bracket 9, which includes a height-adjustable connecting plate 91.

[0097] The upper surface of the connecting plate 91 is provided with trolley guide rail seats 92 facing each other on the left and right. The outer side of the trolley guide rail seat 92 is provided with a first guide rail guard plate 93, the front side is provided with a first front positioning block 94, and the rear side is provided with a fixture docking guard plate 95.

[0098] A locking pin 30 is provided on the locking hole of the first front positioning block 94;

[0099] The fixture 1 is transferred to the fixture placement area 200 of the furnace cavity via the fixture trolley 2 and the trolley fixture bracket 9.

[0100] In this embodiment, the fixture 1, in which the motor 5 to be tested is placed, is fixed on the fixture trolley 2 by the locking pin 30 and the first front positioning block 94. When the fixture 1 is transferred, the locking pin 30 is released so that it can slide on the trolley guide rail seat 92.

[0101] Furthermore, such as Figure 1 , 4 As shown in Figure 5, in order to facilitate the convenient, labor-saving, accurate and safe transfer of fixture 1 from fixture trolley 2 to fixture placement area 200, fixture placement area 200 is provided with furnace fixture bracket 8, which includes a lower support plate 81.

[0102] The upper surface of the lower support plate 81 is provided with furnace guide rail seats 82 facing each other on the left and right, and an adjustment bracket 83 is provided between the lower support plate 81 and the fixture placement area 200.

[0103] The furnace guide rail seat 82 is provided with a second guide rail guard plate 84 on the outer side, a rear top block 85 on the rear side, and a second front positioning baffle 86 on the front side.

[0104] The front end of the furnace guide rail seat 82 is connected to the rear end of the trolley guide rail seat 92 through the fixture docking guard plate 95.

[0105] The second front positioning baffle 86 has a locking hole that mates with the locking pin 30;

[0106] The fixture 1 can move back and forth on the fixture bracket 8 inside the furnace via the furnace guide rail seat 82;

[0107] Both the trolley guide rail seat 92 and the furnace guide rail seat 82 are equipped with multiple guide bearings 40.

[0108] In this embodiment, by moving the jig trolley 2, the trolley guide rail seat 92 is connected to the furnace guide rail seat 82 through the jig docking guard plate 95. Then, the locking pin 30 is released, and the jig 1 on the jig trolley 2 is moved along the trolley guide rail seat 92 and the furnace guide rail seat 82 to the jig placement area 200. It is positioned by the second guide rail guard plate 84 and the rear top block 85. After positioning, the jig 1 is fixed to the furnace jig bracket 8 by connecting the locking pin 30 to the locking hole of the second front positioning block, thus completing the precise positioning and ensuring that the jig mandrel 12 is coaxial with the central drive shaft 41.

[0109] Furthermore, such as Figure 1 , 6 As shown in Figure 7, in order to ensure the coaxiality of the rotation of the jig spindle 12 and to lift the jig 1 to move smoothly and steadily on the jig trolley 2 and the jig bracket 8 in the furnace, the jig housing 11 of the jig 1 and the jig spindle 12 are both provided with bearings (not marked in the figure), and the lower end face of the jig housing 11 is provided with guide strips 14 corresponding to the guide bearings 40.

[0110] Furthermore, such as Figure 1 , 6 As shown in Figure 7, in order to ensure a reliable transmission connection between the jig spindle 12 and the central drive shaft 41, a transition sleeve 15 is provided at one end of the jig spindle 12 connected to the central drive shaft 41, and a manual handle is provided on the transition sleeve 15.

[0111] In this embodiment, after the fixture 1 is positioned in the furnace cavity, before the lifting assembly 43 drives the central drive shaft 41 to descend, the transition sleeve 15 is adjusted by manually rotating the handle to ensure that the central drive shaft 41 is accurately connected to the transition sleeve 15.

[0112] In this embodiment, a positioning member 80 is provided on one side of the lower end of the fixture housing 11, which cooperates with the first front positioning block 94 and the second front positioning block 86. The positioning member 80 is provided with an insertion hole for inserting the locking pin 30.

[0113] Furthermore, such as Figure 1 As shown, in order to facilitate and save effort in loading or unloading the fixture 1 into or from the fixture trolley 2, the fixture trolley 2 is also equipped with a fixture lifting assembly 50.

[0114] In this embodiment, the jig lifting assembly 50 includes a hanger 501, a rope winder 502, a lifting rope, and multiple guide wheels 504. The hanger 501 is located on one side of the jig trolley 2, and the lifting end is located above the jig 1. The rope winder 502 is provided on the connecting end of the hanger 501. Multiple guide wheels 504 are sequentially arranged between the lifting end and the rope winder 502. One end of the lifting rope is connected to the rope winder 502, and the other end passes around the multiple guide wheels 504 and is suspended below the lifting end.

[0115] Furthermore, such as Figure 1 As shown, in order to protect the drive shaft mechanism 4, a protective cover 60 is provided on the outside of the drive shaft mechanism 4.

[0116] Furthermore, such as Figure 1 , 3 As shown in Figure 4, in order to improve the safety and protection during heating tests, the heating furnace assembly 3 includes a furnace body 31, a furnace door 32 is provided on the furnace opening of the furnace body 31, and a lock 33 is provided between the furnace door 32 and the furnace body 31.

[0117] Furthermore, such as Figure 1 As shown, an electrical cabinet 70 is also provided on the rack 100, and the electrical control system is located inside the electrical cabinet 70; a touch screen is provided on the control panel 20.

[0118] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model patent.

Claims

1. An automated motor demagnetization current testing device, comprising a frame, a fixture trolley, and a fixture, characterized in that, The rack is provided with an instrument placement area, and a heating furnace assembly is provided on one side of the instrument placement area; The furnace cavity of the heating furnace assembly is provided with a fixture placement area, and a drive shaft mechanism is provided above it; The fixture trolley is used to transfer the fixture to the fixture placement area in the furnace cavity; The fixture contains a motor to be tested. The fixture includes a fixture housing and a fixture spindle coaxially arranged with the fixture housing. The motor under test includes a stator and a rotor. The rotor is not rotatably connected to the fixture spindle. The stator is fixedly connected to the fixture housing by a retaining block. The drive shaft mechanism includes a central drive shaft, a power assembly, and a lifting assembly; An electromagnetic brake is provided in the middle of the central drive shaft. The upper end of the central drive shaft is connected to the lifting assembly through a bearing, and the lower end extends to the area above the fixture placement area of ​​the furnace cavity. The power assembly, lifting assembly, and electromagnetic brake are fixedly connected to the heating furnace assembly. The power assembly is used to drive the central drive shaft to rotate, and the lifting assembly is used to drive the central drive shaft to connect or separate from the fixture spindle. The instrument placement area is equipped with an electronic control system, as well as instrument components and a control panel electrically connected to the electronic control system. The instrument components include a gaussmeter, an oscilloscope, a positioning power supply, and a demagnetizing power supply; The tested motor, drive shaft mechanism, and electromagnetic brake are electrically connected to the electronic control system.

2. The automated motor demagnetization current testing device according to claim 1, characterized in that, The lifting assembly includes a mounting base, a support plate, a lifting plate, a guide rod, and a lifting driver. The mounting base is connected to the top surface of the heating furnace assembly, and a support plate and a lifting plate are arranged sequentially above the mounting base; The support plate and power component are fixedly connected to the mounting base, and an electromagnetic brake is provided between the support plate and the mounting base. The lifting plate is slidably sleeved with the guide rod, and one end of the guide rod is fixedly connected to the support plate; The lifting driver is fixedly installed on the upper surface of the lifting plate, and its driving end passes through the lifting plate and is provided with a floating joint. The upper end of the central drive shaft is connected to the lifting plate via a rotating shaft, and the middle part is connected to the electromagnetic brake via a bearing.

3. The automated motor demagnetization current testing device according to claim 2, characterized in that, The power assembly includes a servo motor, a master synchronous pulley, a slave synchronous pulley, and a synchronous belt; The servo motor is located on one side of the central drive shaft; The main synchronous pulley and the slave synchronous pulley are located between the support plate and the mounting base. The main synchronous pulley is connected to the drive end of the servo motor, and the main synchronous pulley is connected to the slave synchronous pulley via a synchronous belt. The synchronous pulley is connected to the central drive shaft and is located above the electromagnetic brake.

4. The automated motor demagnetization current testing device according to claim 1, characterized in that, The fixture trolley is equipped with a fixture bracket, which includes a height-adjustable connecting plate. The upper surface of the connecting plate is provided with trolley guide rail seats facing each other on the left and right. A first guide rail guard plate is provided on the outer side of the trolley guide rail seats, a first front positioning block is provided on the front side, and a fixture docking guard plate is provided on the rear side. A locking pin is provided on the locking hole of the first front positioning block; The fixture is transferred to the fixture placement area in the furnace cavity via a fixture trolley and a fixture bracket.

5. The automated motor demagnetization current testing device according to claim 4, characterized in that, The fixture placement area is provided with an in-furnace fixture bracket, which includes a lower support plate. The upper surface of the lower support plate is provided with furnace guide rail seats facing each other on the left and right, and an adjustment bracket is provided between the lower support plate and the fixture placement area. The outer side of the furnace guide rail seat is provided with a second guide rail guard plate, the rear side is provided with a rear top block, and the front side is provided with a second front positioning baffle. The front end of the furnace guide rail seat is connected to the rear end of the trolley guide rail seat through a fixture docking guard plate. The second front positioning baffle is provided with a locking hole that cooperates with the locking pin; The fixture can move back and forth on the fixture bracket inside the furnace via the furnace guide rail seat; Both the trolley guide rail base and the furnace guide rail base are equipped with multiple guide bearings.

6. The automated motor demagnetization current testing device according to claim 4, characterized in that, The fixture housing and the fixture spindle are both equipped with bearings, and the lower end face of the fixture housing is equipped with a guide bar corresponding to the guide bearing.

7. An automated motor demagnetization current testing device according to claim 6, characterized in that, The jig mandrel is connected to the central drive shaft at one end, and a transition sleeve is provided on the transition sleeve. A manual handle is provided on the transition sleeve.

8. An automated motor demagnetization current testing device according to claim 1 or 4, characterized in that, The fixture trolley is also equipped with a fixture hoisting assembly.

9. An automated motor demagnetization current testing device according to claim 1, characterized in that, The drive shaft mechanism is provided with a protective cover on its outer side.

10. An automated motor demagnetization current testing device according to claim 1 or 2, characterized in that, The heating furnace assembly includes a furnace body, a furnace door is provided on the furnace opening of the furnace body, and a lock is provided between the furnace door and the furnace body.

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