A stator turning test device

Abstract

The application provides a kind of stator steering test device, belongs to motor stator detection technical field, including tester and the tabletop of tester inside setting, the bottom of the tabletop is equipped with two fixed plate, the bottom of the fixed plate is connected with moving plate by driving element, driving element is used to control moving plate up and down, the upper end of the moving plate is fixedly installed with motor base by support column, the middle part of the motor base is installed with motor, the output shaft upper end of the motor is provided with rotor column, the upper end of the rotor column is circumferentially arranged with magnet, the upper surface of the motor base is installed with rotor cap, and the rotor column is located inside the rotor cap;The upper end of the tabletop is provided with two sliding grooves, and the sliding groove is slidably connected with a sliding seat;The application can realize the zero contact assembly of rotor cap and stator, reduce the probability of stator being damaged by collision in the assembly process, and does not need manual centering, and the overall test efficiency is higher.

Description

Technical Field

[0001] This application relates to the field of motor stator testing technology, specifically to a stator rotation testing device. Background Technology

[0002] Motor steering is the steering force generated by the brake or coil during motor rotation. The corresponding motor steering test is a key means of detecting this steering force, which is directly related to motor quality inspection and safety testing, and is a core quality control process in motor production.

[0003] Among these, static simulation rotation test of the motor stator is an important branch. The test method involves simulating the magnetic field changes of the rotor rotation using an external mechanism while the stator remains stationary. Instruments detect changes in the stator coil current to determine rotation performance, and further check whether the electromagnetic response of the stator windings is normal and whether the wiring logic meets the rotation requirements. The core technology of this test aims to determine in advance whether the stator can cooperate with the rotor to achieve the expected rotation without assembling the complete motor, thereby avoiding the risk of abnormal rotation or inoperability after motor assembly due to stator failure, and significantly reducing rework costs later.

[0004] In existing technologies, mainstream motor stator rotation testers generally adopt a dual-station structure design. During the testing process, operators need to alternate between the two stations to complete the installation and testing of the stator. However, due to the compact layout of the dual stations, the operating space is significantly insufficient, which makes the stator prone to collision with equipment components during the fixing process. This may not only damage the stator structure but also directly affect the accuracy of subsequent test results.

[0005] To address the aforementioned impact and collision issues, Chinese patent document CN221746127U, entitled "A Sliding Cover Structure for a Motor Stator Tester," proposes an improved solution. This solution includes a support frame, on which a sliding rod is fixedly mounted. The sliding rod slides to mount the sliding cover via a slider. A sensor corresponding to the slider is also mounted on the support frame. A shock-absorbing and buffering mechanism is provided between the outer side of the slider and the end of the sliding rod, and this mechanism is equipped with an anti-rebound mechanism. The technical advantage lies in achieving collision prevention and shock absorption through a stepped rubber shock-absorbing pad, protecting equipment components and facilitating operator operation, thus improving the impact and collision problems during stator installation to a certain extent.

[0006] While the above technical solution can reduce collisions between the stator and the equipment during stator installation, the assembly process of the stator and steering test structure relies on manual operation, making operational errors unavoidable. This results in the stator and steering test structure not being able to be assembled coaxially. This problem not only causes friction between the two, resulting in damage to the stator paint layer or wear and aging of the tooling, but also requires a long time to manually align the steering structure and the inner ring of the stator, directly extending the test cycle and ultimately leading to low overall test efficiency. Summary of the Invention

[0007] In view of this, this application provides a stator rotation test device to solve the problem that the stator rubs against the rotation test structure due to inaccurate positioning during stator installation, which in turn causes damage to the stator paint layer or wear and aging of the tooling.

[0008] To address the aforementioned technical problems, this application provides a stator rotation testing device, including a testing instrument and a platform inside the testing instrument. The platform has two fixed plates at its bottom, and a movable plate is connected to the bottom of each fixed plate via a driving component. The driving component controls the up-and-down movement of the movable plate. A motor mount is fixedly installed on the upper end of the movable plate via a support column. A motor is mounted in the middle of the motor mount. A rotor column is located at the upper end of the motor's output shaft, and magnets are arranged in a circumferential array at the upper end of the rotor column. A rotor cap is mounted on the upper surface of the motor mount, and the rotor column is located inside the rotor cap, with the rotor column and rotor cap coaxially arranged. The platform has two sliding grooves at its upper end, each groove containing a sliding seat. Both the sliding seat and the platform have clearance holes that allow the rotor cap to pass through.

[0009] By adopting the above technical solution, the driving component is activated, causing the moving plate to move downwards until the rotor cap completely passes through the clearance holes on the platform and slide, and the entire plate moves below the platform. This completely removes the stator placement area above the platform from the coverage of the rotor cap, eliminating the need to avoid the rotor cap during stator placement. This avoids the stator wear caused by collisions between the stator and rotor cap during testing, greatly eliminating the risk of contact friction between the stator and rotor cap. The contoured groove achieves rapid initial positioning of the stator through shape adaptation, avoiding horizontal offset during stator placement, reducing the workload of subsequent clamping and adjustment, and ensuring that the center of the stator is roughly aligned with the center of the clearance hole. This facilitates subsequent automatic positioning and clamping of the stator, achieving zero-contact assembly between the stator and rotor cap. This further eliminates mechanical collisions that could damage the precision structure of the stator, and ensures the coaxiality of the rotor cap and stator, ensuring a uniform gap between the magnets on the rotor column and the stator windings during subsequent testing.

[0010] Optionally, the outer side of the rotor cap is connected to an adjusting nut by a threaded connection, and a sealing ring is provided on the stepped surface at the upper end of the adjusting nut, the upper end of the sealing ring being able to abut against the bottom surface of the platform.

[0011] By adopting the above technical solution, the axial position of the adjusting nut on the rotor cap can be changed by rotating the adjusting nut with threaded engagement, thereby adjusting the height of the rotor column and the rotor cap protruding from the platform surface to adapt to stators with different internal cavity sizes. At the same time, when the adjusting nut moves upward, the sealing ring of the stepped surface abuts against the bottom surface of the platform, which can seal the gap between the adjusting nut and the clearance hole, preventing dust and impurities from entering the equipment and affecting the operation of the test components, ensuring the cleanliness of the test environment and the service life of the equipment.

[0012] Optionally, a limiting ring is slidably fitted on the outer side of the rotor cap through an axially arranged vertical groove. A raised strip is provided on the upper edge of the limiting ring, and notches that cooperate with the raised strip are arranged on the lower edge of the adjusting nut. A spring is fitted on the lower end of the outer side of the rotor cap, and the upper end of the spring abuts against the bottom surface of the limiting ring.

[0013] By adopting the above technical solution, the elastic force of the spring can push the limiting ring upward, so that the convex strip on the upper edge of the limiting ring is embedded in the notch on the lower edge of the adjusting nut, forming a circumferential limit, avoiding the adjustment nut from rotating or displacing due to vibration during the test, and ensuring the stability of the rotor column height parameters.

[0014] Optionally, the diameter of the upper end of the adjusting nut is equal to the diameter of the clearance hole, and a chamfer is provided on the outer side of the upper edge of the adjusting nut.

[0015] By adopting the above technical solution, when the moving plate moves upward, the upper end of the adjusting nut can be inserted into the clearance hole between the slide and the platform, forming an axial limit on the slide to prevent it from moving during testing and ensuring the stability of the stator clamping. At the same time, the chamfer on the outer side of the upper edge can correct the slide displacement by the inclined plane when there is a slight deviation in the slide, so that the clearance hole on the slide is precisely aligned with the rotor cap, ensuring the coaxiality of the stator and the rotor cap and avoiding test errors caused by eccentricity.

[0016] Optionally, the upper end of the table is provided with two upright plates, and the front side of each upright plate is fixedly installed with an arc-shaped plate by bolts. The upper end of each slide is provided with a clamping assembly that cooperates with the arc-shaped plate.

[0017] By adopting the above technical solution, the arc plate is fixed to the vertical plate with bolts, which can fit against the outer side of the stator to form a fixed support. In conjunction with the clamping component on the slide, a clamping force is applied to the stator from the other side to realize the automatic positioning and clamping of the stator, ensuring the stability of the stator position during the test.

[0018] Optionally, the clamping assembly includes a positioning frame slidably connected inside the slide block. The upper end of the positioning frame is bolted with a clamping plate that cooperates with the arc-shaped plate. The bottom surface of the positioning frame is provided with two single-sided racks. The bottom surface of the slide block is rotatably connected with two gears. The two gears mesh with the corresponding single-sided racks on the same side. The inside of the slide groove is provided with a double-sided rack. Both gears mesh with the double-sided rack.

[0019] By adopting the above technical solution, when the slide block slides outward along the slide groove, the gear on the bottom surface of the slide block meshes and rotates with the double-sided rack in the slide groove, driving the single-sided rack on the positioning frame to move, so that the positioning frame and the clamping plate are away from the stator placement area at the top of the slide block, automatically avoiding the stator, reducing component interference during stator placement, and reducing the risk of stator wear; when the slide block is reset, the gear and rack drive in opposite directions, driving the clamping plate to move closer to the stator, and automatically clamping the stator in cooperation with the arc plate, without the need for manual adjustment of the clamping plate position, reducing manual intervention steps, and improving testing efficiency and clamping consistency.

[0020] Optionally, each of the slide grooves is provided with a limiting screw that can abut against the slide block to limit the maximum sliding stroke of the slide block.

[0021] Optionally, the upper surface of the slide is provided with a contoured groove that matches the shape of the bottom surface of the stator.

[0022] By adopting the above technical solution, the contoured groove fits the shape of the stator bottom surface, which can quickly limit the horizontal position of the stator when it is placed, avoid the stator from shifting, reduce the workload of subsequent clamping and adjustment, prevent the stator from tipping over due to unstable center of gravity when placed, reduce the risk of stator collision damage, and facilitate rapid loading operation during batch testing.

[0023] Optionally, the driving component is a double-rod cylinder, which can provide stable and reliable power for lifting and lowering the moving plate.

[0024] Optionally, guide posts are provided at the four corners of the bottom surface of the fixed plate, and guide sleeves that are slidably connected to the guide posts are provided at the four corners of the movable plate.

[0025] By adopting the above technical solution, the sliding fit between the guide post and the guide sleeve can limit the lifting trajectory of the moving plate, prevent the moving plate from shifting laterally or rotating during the up-and-down movement, and play a sliding guiding role for the movement of the moving plate.

[0026] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0027] 1. Before testing, the rotor cap is driven by a double-rod cylinder to move down to below the table surface to avoid direct friction between the stator and the rotor cap during stator placement. When the stator is placed, the clamping components are kept away from the stator's placement position, reducing interference between components and wear on the stator's outer surface. At the same time, the movement of the sliding plate automatically completes the positioning and clamping of the stator. During testing, the rotor cap automatically moves up to achieve zero-contact assembly between the rotor cap and the stator, further reducing the probability of the stator being damaged by collision during assembly. Moreover, no manual alignment is required, resulting in higher overall testing efficiency.

[0028] 2. The equipment can adjust the height of the rotor cap protruding from the platform by adjusting the height of the adjusting nut, which can be adapted to the testing of stators of different heights. At the same time, the sealing ring of the step surface of the adjusting nut can simultaneously seal the gap of the clearance hole to prevent dust from entering and affecting the test.

[0029] 3. When the rotor cap moves upward, the upper end of the adjusting nut inserts into the clearance hole to axially limit the slide and lock it in place, ensuring the stability of the stator clamping. At the same time, the chamfer on the upper edge of the adjusting nut can automatically correct slight deviation of the slide, ensuring that the stator and rotor sleeve are coaxial. Meanwhile, the cooperation between the convex strip on the upper edge of the limiting ring and the notch at the bottom of the adjusting nut can reduce the probability of the adjusting nut height shifting due to vibration during the test, ensuring parameter stability during the test from multiple dimensions. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a stator rotation testing device according to this application;

[0031] Figure 2 This is a partial structural diagram of the upper part of the tabletop in this application;

[0032] Figure 3 This is a top view of the upper structure of the tabletop in this application;

[0033] Figure 4 This is a frontal sectional view of the testing organization of this application;

[0034] Figure 5 For this application Figure 4 A magnified schematic diagram of the structure at point A in the diagram;

[0035] Figure 6 This is a partial structural diagram of the testing facility in this application;

[0036] Figure 7 This is a schematic diagram of the internal cross-sectional structure of the slide of this application;

[0037] Figure 8 This is a front sectional view of the slide of this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Tester; 101. Table; 102. Slide groove; 103. Vertical plate; 104. Arc plate; 105. Limiting screw; 2. Fixing plate; 21. Driving component; 22. Moving plate; 221. Guide sleeve; 23. Motor base; 24. Motor; 25. Rotor column; 251. Magnet; 26. Rotor cap; 3. Slide seat; 31. Contour groove; 4. Clearance hole; 5. Adjusting nut; 51. Sealing ring; 52. Chamfer; 6. Limiting ring; 61. Raised strip; 7. Spring; 8. Clamping assembly; 81. Positioning frame; 82. Clamping plate; 83. Single-sided rack; 84. Gear; 85. Double-sided rack; 9. Guide column. Detailed Implementation

[0039] The following will be described in conjunction with embodiments of this application. Figures 1-8 The technical solutions of the embodiments of this application are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this application are within the scope of protection of this application.

[0040] Reference Figure 1 , Figure 2 and Figure 3 This embodiment provides a stator rotation testing device, including a testing instrument 1, a testing mechanism, and a clamping mechanism. The testing instrument 1 has an internal platform 101 with two sliding grooves 102. Each sliding groove 102 has a sliding block 3 slidably connected to it. The upper end of each sliding block 3 has a contoured groove 31 that matches the shape of the stator's bottom surface, facilitating the initial positioning of the stator. The sliding block 3 can be removed from the sliding groove 102 for replacement, making it suitable for testing different stator rotation models. Each sliding groove 102 has a threaded hole with a limiting screw 105 threaded into it. The limiting screw 105 abuts against the sliding block 3 to limit the maximum sliding position of the sliding block 3.

[0041] Reference Figure 4 and Figure 5The testing mechanism includes a fixed plate 2, a driving component 21, a moving plate 22, a motor base 23, and a rotor column 25. The fixed plate 2 is located at the bottom of the platform 101, the driving component 21 is located at the bottom of the fixed plate 2, the upper surface of the moving plate 22 is fixedly connected to the working ends of the two driving components 21 respectively, the motor base 23 is fixedly installed on the upper end of the moving plate 22 by a support column, the motor 24 is fixedly installed in the middle of the motor base 23, the rotor column 25 is located on the upper end of the output shaft of the motor 24, and the upper end of the rotor column 25 is circumferentially arrayed with magnets 251 for testing the stator; a rotor cap 26 is installed on the upper surface of the motor base 23, the rotor column 25 is located inside the rotor cap 26, the rotor column 25 and the rotor cap 26 are coaxially arranged, and the slide 3 and the platform 101 are both provided with clearance holes 4 that allow the rotor cap 26 to pass through.

[0042] When performing a rotation test on the stator, the drive unit 21 is first activated, causing the moving plate 22 to move downwards, so that the rotor cap 26 moves through the clearance hole 4 to the bottom of the platform 101. At this time, the stator is positioned, which can avoid friction between the stator and the rotor cap 26, greatly reducing the damage rate during stator testing. After the stator is positioned and fixed, the drive unit 21 drives the moving plate 22 to move upwards, so that the rotor cap 26 automatically inserts into the stator, achieving zero contact between the stator and the rotor cap 26. After the rotor cap 26 moves into place, the motor 24 at the top of the motor base 23 is started, driving the rotor column 25 and the magnet 251 to rotate, simulating the rotating magnetic field of a real motor, detecting the phase relationship of the induced electromotive force of the stator winding, and completing the rotation test of the stator. There is no need for manual intervention to adjust the rotor cap 26 and the stator ring, shortening the test preparation time for a single stator. At the same time, the subsequent actions can be triggered after the stator is positioned and fixed, which facilitates continuous automatic testing of batch stators, reduces the waiting time between processes, improves the overall testing efficiency, and reduces the probability of component damage caused by manual operation, ensuring the consistency of batch stator testing.

[0043] Reference Figure 4 , Figure 5 and Figure 6The outer side of the rotor cap 26 is connected to an adjusting nut 5 by a threaded connection. The diameter of the upper end of the adjusting nut 5 is equal to the diameter of the clearance hole 4, allowing the adjusting nut 5 to be inserted into the clearance hole 4. The outer side of the upper edge of the adjusting nut 5 is provided with a chamfer 52, which serves as a guide for the adjusting nut 5 to be inserted into the clearance hole 4 and also facilitates the limiting of the slide block 3. A sealing ring 51 is provided on the stepped surface at the upper end of the adjusting nut 5. The upper end of the sealing ring 51 can abut against the bottom surface of the platform 101. The sealing ring 51 can deform to seal the edge of the clearance hole 4. A limiting ring 6 is slidably fitted on the outer side of the rotor cap 26 through an axially provided vertical groove. A protrusion 61 is provided on the circumference of the upper edge of the limiting ring 6. The lower edge of the adjusting nut 5 is provided with notches arranged in a circumferential array to cooperate with the protrusion 61. A spring 7 is fitted on the lower end of the outer side of the rotor cap 26, with the upper end of the spring 7 abutting against the bottom surface of the limiting ring 6.

[0044] Before performing the rotation test on the stator, the operator can slide the limiting ring 6 downwards along the vertical groove. This releases the initial contact between the limiting ring 6 and the adjusting nut 5, completely disengaging the limiting ring 6 from the mating area of ​​the adjusting nut 5. At this point, the adjusting nut 5 is no longer constrained circumferentially by the limiting ring 6 and can rotate freely around its own axis. The adjusting nut 5 and the rotor cap 26 are threadedly fitted. When the adjusting nut 5 is rotated, it can undergo axial displacement. By adjusting the height of the rotor column 25 and the protruding platform 101 of the rotor cap 26, it can be ensured that the magnet 251 at the upper end of the rotor column 25 forms an effective contact with the corresponding test part of the stator. To avoid test interference or poor contact caused by height deviation, the rotor cap 26 moves upward, and the adjusting nut 5 moves upward accordingly. The sealing ring 51 on its stepped surface comes into close contact with the bottom surface of the platform 101. At this time, the sealing ring 51 is squeezed and deformed, which can fill the annular gap between the adjusting nut 5 and the clearance hole 4 to form a radial seal. This not only prevents external impurities from entering the clearance hole 4 and avoids impurities from affecting the thread fit accuracy of the adjusting nut 5, but also adapts to some stators that need to be tested in a vacuum environment, ensuring the long-term stable operation of the equipment.

[0045] After the position of the adjusting nut 5 is adjusted, the operator loosens the limiting ring 6. At this time, the spring 7 connected to the limiting ring 6 releases its elastic force, driving the limiting ring 6 to return to its original position upwards until the limiting ring 6 is in close contact with the lower edge of the adjusting nut 5. At the same time, the protrusion 61 on the upper edge of the limiting ring 6 is embedded in the notch on the lower edge of the adjusting nut 5, forming a circumferential limiting fit on the adjusting nut 5. This restricts the circumferential rotation of the adjusting nut 5, prevents the adjusting nut 5 from rotating on its own due to vibration during the test, reduces the probability of the adjusting nut 5 being displaced along the axial direction, and ensures that the height position of the rotor column 25 and the rotor cap 26 is always kept within the preset test accuracy range, thereby improving the test accuracy.

[0046] Reference Figure 4 and Figure 6 The driving component 21 is a double-rod cylinder. The bottom surface of the fixed plate 2 is provided with guide posts 9 at the four corners. The four corners of the moving plate 22 are provided with guide sleeves 221 that are slidably connected to the guide posts 9. The double-rod cylinder can provide stable thrust. The guide posts 9 and guide sleeves 221 work together to guide the movement of the moving plate 22, making the movement of the moving plate 22 more stable.

[0047] Reference Figure 3 , Figure 7 and Figure 8 The clamping mechanism includes a vertical plate 103, an arc-shaped plate 104, and a clamping assembly 8. The vertical plate 103 is located at the upper end of the table 101, and the arc-shaped plate 104 is adjustablely installed on the front side of the vertical plate 103 by bolts. The clamping assembly 8 includes a positioning frame 81 and a clamping plate 82. The positioning frame 81 is slidably connected to the inside of the slide block 3, and the clamping plate 82 is adjustablely installed on the upper end of the positioning frame 81 by bolts. The clamping plate 82 cooperates with the arc-shaped plate 104 on the same side to position and clamp the stator. The bottom surface of the positioning frame 81 is provided with two single-sided racks 83, and the bottom surface of the slide block 3 is rotatably connected with two gears 84. The two gears 84 respectively mesh with the single-sided racks 83 on the same side. The inside of the slide groove 102 is provided with a double-sided rack 85, and both gears 84 mesh with the double-sided rack 85.

[0048] During testing, the slide block 3 is first pulled outward along the slide groove 102, moving it away from the arc plate 104. During this process, the gear 84 at the bottom of the slide block 3 engages with the double-sided rack 85 to rotate the gear 84. This, in turn, causes the positioning frame 81 to move relative to the slide block 3 via the single-sided rack 83 meshing with the gear 84. Ultimately, this moves the positioning frame 81 and the clamping plate 82 away from the contoured groove 31 at the upper end of the slide block 3, facilitating the fixed placement of the stator. During placement, keeping the clamping plate 82 and the arc plate 104 away from the contoured groove 31 significantly reduces interference between the clamping plate 82 and the arc plate 104 and the stator, effectively reducing friction or collision between the outer surface of the stator and the clamping plate 82 and the arc plate 104 during placement. This reduces the probability of physical damage to the stator caused by the placement operation, ensures the integrity of the original stator structure, and lays the foundation for the accuracy of subsequent test data. After the stator is positioned, the slide block 3 is pushed backward along the slide groove 102 to the last end, so that the clearance hole 4 on the slide block 3 is coaxial with the clearance hole 4 on the table 101. At this time, under the transmission action of the gear 84, the positioning frame 81 and the clamping plate 82 are driven to gradually approach the stator and closely abut against the outer side of the stator. At the same time, the clamping plate 82 and the arc plate 104 stably clamp the stator and limit it from different radial directions of the stator, effectively restricting the horizontal movement of the stator and providing a basic guarantee for the stable placement of the stator during the testing process.

[0049] After clamping, the moving plate 22 and the rotor sleeve move upward, allowing the adjusting nut 5 on the outside of the rotor sleeve to insert into the clearance hole 4. The cooperation between the adjusting nut 5 and the clearance hole 4 not only achieves axial limitation of the slide 3, but also forms a rigid constraint through the structural adaptation of the two, preventing the slide 3 from shifting due to equipment vibration, external interference, or other factors during the test. This further consolidates the clamping stability of the stator and ensures that the stator maintains the preset test posture throughout the entire test cycle. In addition, the upper edge of the adjusting nut 5 is provided with a chamfer 52, which serves two purposes: firstly, it helps to prevent the adjusting nut 5 from being inserted into the clearance hole 4. The chamfer 52 serves as a guide, ensuring that even if the slide 3 is slightly misaligned, it can guide the adjusting nut 5 smoothly into the clearance hole 4, preventing rigid collision between the adjusting nut 5 and the edge of the clearance hole 4, reducing wear during component installation, and extending the service life of the adjusting nut 5 and the slide 3. On the other hand, after the adjusting nut 5 is fully inserted, the chamfer 52 can adaptively correct the slight misalignment of the slide 3 through the bevel contact, ensuring that the slide 3 is ultimately and accurately reset, thereby ensuring that the stator and rotor sleeve on the slide 3 are strictly coaxial, improving the accuracy of the test, and significantly enhancing the accuracy and repeatability of the test data.

[0050] In use, the double-rod cylinder is activated. Guided by the guide column 9 and guide sleeve 221, the moving plate 22 carries the motor base 23 and rotor cap 26 vertically downwards until the rotor cap 26 is completely retracted below the platform 101. Then, the slide 3 is pulled outwards. The gear 84 and double-sided rack 85 cooperate to drive the single-sided rack 83 and positioning frame 81 to move, while simultaneously moving the positioning frame 81 and clamping plate 82 away from the contour groove 31 of the slide 3, eliminating interference when the stator is placed, and facilitating the initial positioning of the stator in the groove. Then, the slide 3 is pushed back to the initial position, so that the clearance hole 4 on the slide 3 is coaxial with the clearance hole 4 on the platform 101. During reset, the gear 84 rotates in the opposite direction, causing the clamping plate 82 to move closer to the stator. The clamping plate 82 cooperates with the arc plate 104 to clamp the stator. The limiting ring 6 slides down the vertical groove to release the locking of the adjusting nut 5. By rotating the adjusting nut 5, its axial displacement can be adjusted to adjust the height of the rotor column 25 and rotor cap 26 protruding from the platform 101. The limiting ring 6 is released, and the spring 7 drives it to abut against the adjusting nut 5. The protrusion 61 cooperates with the notch at the bottom of the adjusting nut 5 to mechanically lock the adjusting nut 5, preventing the adjusting nut 5 from being displaced by external influences, thereby adapting to different models of stators. Then, the double-rod cylinders move in opposite directions, and the moving plate 22 moves the rotor cap 26 upward. The rotor cap 26 is precisely inserted into the stator cavity with zero contact. The adjusting nut 5 is inserted into the clearance hole 4 at the same time, and the sealing ring 51 seals the gap of the clearance hole 4. At the same time, the slide 3 is limited in the planar direction to ensure the stability of the stator position during the test. The chamfer 52 can correct the skew of the slide 3 and ensure that the stator and rotor sleeve are coaxial. The motor 24 starts to drive the rotor column 25 and magnet 251 to rotate, simulating a rotating magnetic field. The tester 1 collects the induced electromotive force of the stator winding through the probe and analyzes the phase to complete the stator rotation test.

[0051] The implementation principle of a stator rotation testing device according to an embodiment of this application is as follows:

[0052] Before conducting tests on the stator, the double-rod cylinder must be activated. Under the sliding guidance of the guide column 9 and the guide sleeve 221, the moving plate 22 can be driven to move smoothly downward in the vertical direction. At the same time, the motor base 23 and rotor cap 26 on the moving plate 22 move downward with the moving plate 22 until the rotor cap 26 is completely moved below the platform 101. After the rotor cap 26 has moved outward, the operator pulls the slide block 3 outward along the slide groove 102 opened on the platform 101. When the slide block 3 moves outward, the gear 84 is subjected to the double-sided rack 8 The tooth surface force causes rotation, and the gear 84 simultaneously meshes with the single-sided rack 83 fixed on the positioning frame 81, thereby causing the positioning frame 81 to move horizontally relative to the slide block 3. Finally, the positioning frame 81 and the clamping plate 82 connected to the end move away from the contour groove 31 opened at the upper end of the slide block 3. The inner contour of the contour groove 31 matches the outer contour of the stator to be tested. After the clamping plate 82 moves away, it can eliminate the mechanical interference when the stator is placed, making it easy for the operator to quickly put the stator into the contour groove 31 to complete the initial positioning.

[0053] After the stator is placed into the contour groove 31 for initial positioning, the slide 3 is pushed to the rear end along the slide groove 102 so that the clearance hole 4 on the slide 3 is coaxial with the clearance hole 4 on the table 101. During the resetting process of the slide 3, the bottom gear 84 rotates in the opposite direction and drives the positioning frame 81 and the clamping plate 82 to move towards the stator through meshing with the single-sided rack 83 until the clamping plate 82 and the arc plate 104 fixed on the slide 3 form a cooperation, clamping and fixing the stator in the contour groove 31 to ensure the positional stability of the stator during testing.

[0054] Subsequently, the dual-rod cylinder initiates a reverse action, driving the moving plate 22 to move vertically upwards. The motor base 23 and rotor cap 26 move upwards synchronously with the moving plate 22 until the rotor cap 26 is precisely inserted into the inner cavity of the stator, achieving zero-contact assembly between the stator and the rotor cap 26. Simultaneously, the adjusting nut 5, sleeved on the outer side of the rotor cap 26, is inserted into the clearance hole 4 between the slide 3 and the platform 101. A sealing ring 51 is provided on the stepped surface of the adjusting nut 5, with its upper end tightly abutting against the bottom surface of the platform 101, sealing the gap between the adjusting nut 5 and the clearance hole 4. The outer wall of the adjusting nut 5 matches the inner wall of the clearance hole 4, providing axial limitation for the slide 3 and preventing horizontal displacement of the slide 3 during testing. Furthermore... The outer side of the upper edge of the adjusting nut 5 is machined with a chamfer 52 structure. When the slide 3 is slightly misaligned due to assembly error, the chamfer 52 can automatically correct the position of the slide 3 through the guide effect of the inclined surface, ensuring that the stator and rotor sleeve on the slide 3 remain coaxial during the test, thereby improving the test accuracy. After the rotor cap 26 is in place, the motor 24 at the upper end of the motor base 23 starts, driving the rotor column 25 and magnet 251 to rotate. The magnet 251 is evenly distributed along the circumference of the rotor column 25. When rotating, it can simulate the rotating magnetic field during the actual operation of the motor. The tester 1 is connected to the lead wire of the stator winding through the probe to collect the signal of the induced electromotive force of the stator winding in real time. By analyzing the phase relationship of the induced electromotive force, the stator rotation test can be completed.

[0055] Before testing different stator models, the height of the rotor column 25 needs to be adjusted to accommodate stators of different heights. First, slide the limiting ring 6 downwards along the vertical groove to separate the limiting ring 6 from the adjusting nut 5, thus releasing the rotation restriction of the adjusting nut 5. Then, rotate the adjusting nut 5 by means of the anti-slip texture on the outside of the adjusting nut 5. The adjusting nut 5 and the rotor cap 26 are connected by threads, and the axial displacement of the adjusting nut 5 is achieved through thread transmission, thereby changing the height of the rotor column 25 and the rotor cap 26 protruding from the platform 101. After the height is adjusted, the limiting ring 6 is released. Under the action of the spring 7, the limiting ring 6 moves upwards and abuts against the adjusting nut 5. The convex strip 61 matches the cross-sectional shape of the notch, which can form a mechanical lock to prevent the adjusting nut 5 from rotating due to vibration during the test, ensuring the long-term stability of the height position of the rotor column 25 and meeting the testing adaptation requirements of different stator models.

[0056] Furthermore, in the description of this application, the terms "installation", "connection", "linking", and "setting" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. A stator turning test device, comprising a tester and a table arranged inside the tester, characterized in that: the bottom of the table is provided with two fixed plates, the bottom of the fixed plate is connected with a moving plate through a driving piece, the driving piece is used for controlling the moving plate to move up and down, the upper end of the moving plate is fixedly installed with a motor base through a support column, the middle part of the motor base is installed with a motor, the output shaft of the motor is provided with a rotor column at the upper end, the upper end of the rotor column is circumferentially arranged with a magnet, the upper surface of the motor base is installed with a rotor cap, the rotor column is located inside the rotor cap, and the rotor column and the rotor cap are coaxially arranged; the upper end of the table is provided with two sliding grooves, the sliding grooves are both slidably connected with sliding seats, and the sliding seats and the table are both provided with avoiding holes through which the rotor cap can pass; the outer side of the rotor cap is threadedly connected with an adjusting nut through a screw thread, the upper end of the adjusting nut is provided with a sealing ring on the step surface, and the upper end of the sealing ring can abut against the bottom surface of the table; the outer side of the rotor cap is slidably sleeved with a limiting ring through an axial vertical groove, the upper edge surface of the limiting ring is circumferentially provided with a convex strip, the lower edge surface of the adjusting nut is circumferentially arranged with a notch matched with the convex strip, the outer side of the rotor cap is sleeved with a spring at the lower end, and the upper end of the spring abuts against the bottom surface of the limiting ring; the upper end of the table is provided with two vertical plates, the front side of the vertical plate is fixedly installed with an arc-shaped plate through a bolt, and the upper end of the sliding seat is provided with a clamping assembly matched with the arc-shaped plate; the clamping assembly comprises a positioning frame slidably connected inside the sliding seat, the upper end of the positioning frame is installed with a clamping plate matched with the arc-shaped plate through a bolt, and the bottom surface of the positioning frame is provided with two single-sided racks; the bottom surface of the sliding seat is rotatably connected with two gears, the two gears are respectively engaged with the corresponding single-sided rack on the same side, and the inside of the sliding groove is provided with a double-sided rack, and the two gears are engaged with the double-sided rack.

2. A stator turning test apparatus as claimed in claim 1, wherein: The diameter of the upper end of the adjusting nut is equal to the diameter of the avoiding hole, and the outer side of the upper edge surface of the adjusting nut is provided with a chamfer.

3. A stator turning test apparatus as claimed in claim 1, wherein: The inside of the sliding groove is provided with a limiting screw capable of abutting against the sliding seat.

4. A stator steering test apparatus according to claim 1, wherein: The upper surface of the sliding seat is provided with a profiling groove matched with the shape of the stator bottom surface.

5. A stator steering test apparatus as claimed in claim 1, wherein: The driving piece is a double-rod air cylinder.

6. A stator steering test apparatus as claimed in claim 1, wherein: The bottom surface of the fixed plate is provided with a guide column at four corners, and the four corners of the moving plate are provided with guide sleeves slidably connected with the guide columns.

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