Electromagnetic compatibility test motor loading device

Abstract

The utility model provides a kind of electromagnetic compatibility test motor loading device, including bottom plate, the top of the bottom plate is fixedly connected with dark box, the top of the bottom plate is slidably matched with displacement frame located dark box side, the side of displacement frame away from dark box is slidably matched with mounting plate, fixed component is provided on the displacement frame, the top opening of the dark box is fixedly installed with cover plate by bolt, the inner wall of the side plate of the dark box away from displacement frame is fixedly connected with magnetic powder brake controller, the opposite side plate of the dark box away from magnetic powder brake controller is inserted with connector. By sliding strip block adjustment mounting groove size, different specifications motor mounting plate are adapted;Displacement frame moves along the bottom plate transversely, mounting plate moves up and down relative to displacement frame, combined with the positioning adjustment of positioning column, the multidimensional adaptation of different output shaft position motor is realized, the trouble of operator repeatedly disassembling and adjusting motor is reduced, and the problem of single adjustment function of existing clamping device is solved.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic compatibility testing technology, specifically to an electromagnetic compatibility testing motor loading device. Background Technology

[0002] Computerized management and electronic control systems widely used in automobiles must meet the measurement requirements for radiation and conduction in automotive electronic electromagnetic compatibility (EMC), including interference testing and immunity testing. Existing EMC motor loading mechanisms require connecting the motor's output shaft to the testing machine's connecting shaft via a coupling for transmission during motor loading analysis and testing. Since the central axis of the testing machine's connecting shaft is fixed, and the size of the motors under test varies significantly, the position of their output shafts within the overall motor structure also differs. They are not all located at the center of the motor; they may be biased to one side or exhibit an asymmetrical distribution due to motor design requirements. The adjustment functions of existing clamping devices are mostly limited to fine-tuning in a single direction, and cannot adapt to the multi-dimensional offset of the output shaft of different motor sizes. Operators need to repeatedly disassemble and adjust the motor position during installation, affecting the stability of the testing system and the reliability of the test data. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide an electromagnetic compatibility testing motor loading device to solve the problems mentioned in the background. This invention features a novel structure. By adjusting the size of the mounting slot through a sliding strip block, it can adapt to mounting plates of different specifications of motors. The displacement frame moves laterally along the base plate, and the mounting plate moves up and down relative to the displacement frame. Combined with the positioning adjustment of the positioning column, it achieves multi-dimensional adaptation to motors with different output shaft positions, reducing the trouble of operators repeatedly disassembling and adjusting the motor, and effectively solving the problem of the single adjustment function of existing clamping devices.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an electromagnetic compatibility testing motor loading device, comprising a base plate, a dark box fixedly connected above the base plate, a displacement frame slidably fitted on one side of the dark box above the base plate, a mounting plate slidably fitted on the side of the displacement frame away from the dark box, a fixing component provided on the displacement frame, a cover plate fixedly installed at the top opening of the dark box by bolts, a magnetic powder brake controller fixedly connected to the inner wall of the dark box away from the displacement frame, a connector inserted into the opposite side plate of the dark box away from the magnetic powder brake controller, a bushing sleeve fitted inside the connector, a coupling inserted into the inner wall of the end of the bushing outside the dark box, and a long shaft inserted into the inner wall of the coupling near the bushing sleeve.

[0005] Furthermore, a magnetic powder brake is sleeved on the outer side of the end of the long shaft located away from the coupling and inside the dark box. Two brushes are fixedly connected between the inner wall of the bushing and the periphery of the long shaft. The two brushes are arranged horizontally at equal intervals and are annularly sleeved on the inner wall of the bushing. The output end of the magnetic powder brake is electrically connected to the output end of the magnetic powder brake controller.

[0006] Furthermore, a first sliding groove is formed on the upper side of the base plate, and a first slider is fixedly connected to the bottom of the displacement frame and slidably engaged in the first sliding groove. A first screw is rotatably engaged inside the first sliding groove and extends to the outside of the side of the base plate. The first screw passes through the first slider and is threadedly engaged with it.

[0007] Furthermore, a second sliding groove is provided through the side of the displacement frame, and a second slider is fixedly connected to one side of the mounting plate and slidably engaged in the second sliding groove. Fixing blocks are fixedly connected to both the upper and lower sides of the side of the displacement frame located in the second sliding groove, and a second screw that is threadedly engaged with the second slider is rotatably engaged between the two fixing blocks.

[0008] Furthermore, the side of the displacement frame has a through hole that is coaxial with the coupling and the long shaft, and the middle of the displacement frame has an annular groove that is coaxial with the through hole. A fixing frame is fixedly connected to the top of the displacement frame, and the inner cavity of the fixing frame is connected to the annular groove.

[0009] Furthermore, the mounting plate has a through groove extending vertically through the middle of its center. Four strip-shaped blocks with grooves parallel to its four sides slide within the through groove. The four strip-shaped blocks are arranged in pairs facing each other, and the grooves of two mutually perpendicular strip-shaped blocks form a mounting groove for mounting the motor under test.

[0010] Furthermore, the fixing component includes a rotating rod rotatably fitted on both side plates of the fixing frame, a worm gear fixedly connected to the circumference of the rotating rod inside the fixing frame, and a worm wheel meshing with the worm gear rotatably fitted on the inner wall of the annular groove.

[0011] Furthermore, four positioning pins are slidably fitted on the inner wall of the through hole and the annular groove. The abutting ends of the four positioning pins are located inside the through hole and cooperate with the output shaft of the motor under test. The inner diameter of the worm gear is fixedly connected to an annular plate that is rotatably fitted in the annular groove. The annular plate is provided with four linkage slots in a circumferential array. The outer ends of the four positioning pins are respectively fixedly connected to connecting pins that cooperate with the four linkage slots.

[0012] The beneficial effects of this utility model are:

[0013] 1. This electromagnetic compatibility testing motor loading device adjusts the size of the mounting slot by sliding a strip block to adapt to mounting plates of different specifications of motors; the displacement frame moves laterally along the base plate and the mounting plate moves up and down relative to the displacement frame. Combined with the positioning adjustment of the positioning column, it achieves multi-dimensional adaptation to motors with different output shaft positions, reducing the trouble of operators repeatedly disassembling and adjusting the motor, and solving the problem of the single adjustment function of the existing clamping device.

[0014] 2. The dark box of the electromagnetic compatibility test motor loading device reduces the interference of the external environment on the test; the magnetic powder brake controller precisely controls the magnetic powder brake to provide a stable load for the motor under test and ensure the accuracy of the loading force; the brushes ensure stable power transmission when the long shaft rotates, and the connection of components such as couplings and bushings enhances the overall structural stability, thereby improving the reliability of the test data. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an electromagnetic compatibility testing motor loading device according to the present invention;

[0016] Figure 2 This is a schematic diagram of the internal components of the dark box of this utility model;

[0017] Figure 3 This utility model Figure 2 -Enlarged structural diagram at point A;

[0018] Figure 4 This is a schematic diagram of the connection between the displacement frame and the mounting plate of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the fixing component of this utility model.

[0020] In the diagram: 1. Base plate; 2. Dark box; 3. Displacement frame; 4. Mounting plate; 5. Fixing assembly; 501. Rotating rod; 502. Worm gear; 503. Worm wheel; 504. Positioning column; 505. Annular plate; 506. Linkage groove; 507. Connecting column; 6. Cover plate; 7. First sliding groove; 8. First slider; 9. First screw; 10. Magnetic powder brake controller; 11. Connector; 12. Bushing; 13. Coupling; 14. Long shaft; 15. Brush; 16. Magnetic powder brake; 17. Second slider; 18. Fixing block; 19. Second screw; 20. Through hole; 21. Annular groove; 22. Fixing frame; 23. Second sliding groove; 24. Through groove; 25. Strip block; 26. Mounting groove. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please refer to Figures 1 to 5 This utility model provides a technical solution: an electromagnetic compatibility testing motor loading device, including a base plate 1, a dark box 2 fixedly connected to the top of the base plate 1, a displacement frame 3 slidably fitted on one side of the dark box 2 above the base plate 1, a mounting plate 4 slidably fitted on the side of the displacement frame 3 away from the dark box 2, a fixing component 5 provided on the displacement frame 3, a cover plate 6 fixedly installed at the top opening of the dark box 2 by bolts, a magnetic powder brake controller 10 fixedly connected to the inner wall of the side plate of the dark box 2 away from the displacement frame 3, a connector 11 inserted into the opposite side plate of the dark box 2 away from the magnetic powder brake controller 10, a bushing 12 sleeved on the inner side of the connector 11, a coupling 13 inserted into the inner wall of the end of the bushing 12 outside the dark box 2, and a long shaft 14 inserted into the inner wall of the coupling 13 near the bushing 12.

[0023] In this embodiment, a magnetic powder brake 16 is sleeved on the outer side of the end of the long shaft 14 located away from the coupling 13 inside the dark box 2. Two brushes 15 are fixedly connected between the inner wall of the bushing 12 and the periphery of the long shaft 14. The two brushes 15 are arranged laterally at equal intervals and are annularly sleeved on the inner wall of the bushing 12. The output end of the magnetic powder brake 16 is electrically connected to the output end of the magnetic powder brake controller 10. A first sliding groove 7 is formed downward on the upper side of the base plate 1, and the bottom of the displacement frame 3 is fixedly connected to a sliding fit within the first sliding groove 7. The first slider 8 has a first screw 9 that rotatably engages with the inside of the first groove 7 and extends to the outside of the side of the base plate 1. The first screw 9 passes through the first slider 8 and is threadedly engaged with it. The side of the displacement frame 3 has a second groove 23. The side of the mounting plate 4 is fixedly connected to a second slider 17 that slidably engages with the second groove 23. The upper and lower sides of the side of the displacement frame 3 located in the second groove 23 are fixedly connected to fixing blocks 18. The two fixing blocks 18 are rotatably engaged with a second screw 19 that is threadedly engaged with the second slider 17.

[0024] Specifically, by rotating the first screw 9, the displacement frame 3 is moved laterally along the base plate 1 in cooperation with the first slide groove 7 and the first slider 8, so that the output shaft of the motor under test is connected to the long shaft 14 through the coupling 13. During the test, the magnetic powder brake controller 10 controls the magnetic powder brake 16 to work and apply a load to the long shaft 14. The load is transmitted to the motor under test through the coupling 13 to simulate the actual working load. The two brushes 15 on the inner wall of the bushing 12 ensure the power transmission when the long shaft 14 rotates. The connector 11 and the bushing 12 ensure the stability of the connection between the long shaft 14 and the dark box 2. The dark box 2 provides a relatively closed environment for the test and reduces external interference.

[0025] In this embodiment, the displacement frame 3 has a through hole 20 on its side, coaxial with the coupling 13 and the long shaft 14. The displacement frame 3 has an annular groove 21 centered on the through hole 20 in its center. A fixing frame 22 is fixedly connected to the top of the displacement frame 3. The inner cavity of the fixing frame 22 communicates with the annular groove 21. The mounting plate 4 has a through groove 24 running vertically through its center. Four strip blocks 25 with grooves parallel to their four sides slide within the through groove 24. The four strip blocks 25 are arranged opposite each other in pairs, and the grooves of two mutually perpendicular strip blocks 25 form mounting grooves 26 for mounting the motor mounting plate under test. The four mounting grooves 26 can be adjusted by sliding the four strip blocks 25, allowing for installation on motor mounting plates of different specifications. The fixing assembly 5 includes a rotating rod 501 rotatably fitted on both side plates of the fixing frame 22. A worm gear 502 is fixedly connected to the rotating rod 501 on its periphery inside the fixing frame 22. The inner wall of the annular groove 21 is rotatably fitted with a worm wheel 503 that meshes with the worm 502. Four positioning pins 504 are slidably fitted in a circumferential array on the inner wall between the through hole 20 and the annular groove 21. The abutting ends of the four positioning pins 504 are located inside the through hole 20 and engage with the output shaft of the motor under test. An annular plate 505, rotatably fitted within the annular groove 21, is fixedly connected to the inner diameter of the worm wheel 503. Four linkage grooves 506 are circumferentially arranged on the annular plate 505. Connecting pins 507, engaging with the four linkage grooves 506, are fixedly connected to the outer ends of the four positioning pins 504 respectively. First, the output shaft of the motor under test is placed in the through hole 20 and positioned and fixed by the four positioning pins 504. The position of the mounting plate 4 is adjusted and fixed to the mounting plate of the motor under test. Then, the four positioning pins 504 are retracted into the worm wheel 503 to release the fixation of the output shaft of the motor under test. The position of the moving displacement frame 3 is connected to the output shaft of the motor under test and the long shaft 14 via the coupling 13.

[0026] Specifically, the output shaft of the motor under test is placed in the through hole 20. Rotating the rotating rods 501 on both sides of the fixing frame 22 causes the worm gear 502 to rotate. The worm wheel 503, meshing with the worm gear 502, rotates in the annular groove 21. The annular plate 505 inside the worm wheel 503 rotates synchronously. Through the engagement of the linkage groove 506 on the annular plate 505 and the connecting post 507 at the outer end of the positioning post 504, the four positioning posts 504 move towards the center of the through hole 20 and abut against the output shaft of the motor under test, completing the positioning and fixing. Rotate the second screw 19, and under the action of the second slide groove 23 and the second slider 17, adjust the position of the mounting plate 4, fix the mounting plate of the motor under test to the mounting groove 26, and according to the specifications of the mounting plate of the motor under test, slide the four strip blocks 25 in the through groove 24 of the mounting plate 4, so that the grooves of the two perpendicular strip blocks 25 form a matching mounting groove 26, fix the mounting plate of the motor under test to the mounting groove 26, and then rotate the rotating rod 501 in the opposite direction to retract the positioning post 504 and release the fixation of the output shaft of the motor under test.

[0027] When using the device, during electromagnetic compatibility testing, the output shaft of the motor under test is placed inside the through hole 20. Rotating the rotating rods 501 on both sides of the fixed frame 22 drives the worm gear 502 to rotate. The worm wheel 503, meshing with the worm gear 502, rotates within the annular groove 21. The annular plate 505 inside the worm wheel 503 rotates synchronously. Through the engagement of the linkage groove 506 on the annular plate 505 and the connecting post 507 at the outer end of the positioning post 504, the four positioning posts 504 are moved towards the center of the through hole 20 until... The output shaft of the motor under test is pressed against the ground to complete the positioning and fixing of the output shaft. Then, the second screw 19 is rotated, and the position of the mounting plate 4 is adjusted under the sliding cooperation of the second slide groove 23 and the second slider 17. Then, according to the specifications of the mounting plate of the motor under test, the four strip blocks 25 in the through groove 24 of the mounting plate 4 are slid, so that the grooves of the two perpendicular strip blocks 25 form a mounting groove 26 that matches the mounting plate of the motor under test. Then, the mounting plate of the motor under test is fixed to the mounting groove 26 by fixing bolts. At this time, the reverse... Rotate the rotating rod 501 to retract the positioning pin 504 from the output shaft of the motor under test, releasing the positioning fixation of the output shaft. Rotate the first screw 9 again to adjust the lateral position of the displacement frame 3. Connect and fix the output shaft of the motor under test to the long shaft 14 through the coupling 13. After completing the above operations, start the magnetic powder brake controller 10, which will control the magnetic powder brake 16 to work and apply a load to the long shaft 14. This load is transmitted to the motor under test through the coupling 13 to simulate the load state when the motor is actually working. At the same time, the two brushes 15 on the inner wall of the bushing 12 ensure the power transmission during the rotation of the long shaft 14. The dark box 2 provides a relatively closed test environment to reduce external interference. After the test is completed, turn off the magnetic powder brake controller 10 to stop the magnetic powder brake 16 from working and release the load. Then disconnect the connection between the coupling 13 and the output shaft of the motor under test and the long shaft 14. Rotate the first screw 9 in the opposite direction to move the displacement frame 3 to the initial position. Loosen the mounting plate 4 from the mounting plate of the motor under test. Finally, take out the motor under test.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electromagnetic compatibility testing motor loading device, comprising a base plate (1), characterized in that: A dark box (2) is fixedly connected above the base plate (1). A displacement frame (3) located on one side of the dark box (2) is slidably fitted above the base plate (1). A mounting plate (4) is slidably fitted on the side of the displacement frame (3) away from the dark box (2). A fixing component (5) is provided on the displacement frame (3). A cover plate (6) is fixedly installed at the top opening of the dark box (2) by bolts. A magnetic powder brake controller (10) is fixedly connected to the inner wall of the side plate of the dark box (2) away from the displacement frame (3). A connector (11) is inserted into the opposite side plate of the dark box (2) away from the magnetic powder brake controller (10). A bushing (12) is sleeved on the inner side of the connector (11). A coupling (13) is inserted into the inner wall of the end of the bushing (12) located outside the dark box (2). A long shaft (14) is inserted into the inner wall of the coupling (13) near the bushing (12).

2. The electromagnetic compatibility testing motor loading device according to claim 1, characterized in that: A magnetic powder brake (16) is sleeved on the outer side of the end of the long shaft (14) located away from the coupling (13) inside the dark box (2). Two brushes (15) are fixedly connected between the inner wall of the bushing (12) and the periphery of the long shaft (14). The two brushes (15) are arranged horizontally at equal intervals. The brushes (15) are sleeved in a ring on the inner wall of the bushing (12). The output end of the magnetic powder brake (16) is electrically connected to the output end of the magnetic powder brake controller (10).

3. The electromagnetic compatibility testing motor loading device according to claim 2, characterized in that: The bottom plate (1) has a first groove (7) on its upper side facing downwards. The bottom of the displacement frame (3) is fixedly connected to a first slider (8) that slides in the first groove (7). The first groove (7) is rotatably connected to a first screw (9) that extends to the outside of the side of the bottom plate (1). The first screw (9) passes through the first slider (8) and is threadedly engaged with it.

4. The electromagnetic compatibility testing motor loading device according to claim 3, characterized in that: The displacement frame (3) has a second slide groove (23) through it. The mounting plate (4) has a second slider (17) that slides in the second slide groove (23) fixedly connected to one side. The displacement frame (3) has fixed blocks (18) fixedly connected to both the upper and lower sides of the second slide groove (23). The two fixed blocks (18) are rotatably connected to a second screw (19) that is threadedly engaged with the second slider (17).

5. The electromagnetic compatibility testing motor loading device according to claim 4, characterized in that: The displacement frame (3) has a through hole (20) on its side, which is coaxial with the coupling (13) and the long shaft (14). The displacement frame (3) has an annular groove (21) in the middle, which is coaxial with the through hole (20). A fixed frame (22) is fixedly connected to the top of the displacement frame (3). The inner cavity of the fixed frame (22) is connected to the annular groove (21).

6. The electromagnetic compatibility testing motor loading device according to claim 5, characterized in that: The mounting plate (4) has a through groove (24) extending vertically through the middle. Four strip blocks (25) with grooves parallel to its four sides are slidably fitted in the through groove (24). The four strip blocks (25) are arranged opposite each other in pairs, and the grooves of two mutually perpendicular strip blocks (25) form a mounting groove (26) for mounting the motor mounting plate under test.

7. The electromagnetic compatibility testing motor loading device according to claim 6, characterized in that: The fixing component (5) includes a rotating rod (501) rotatably fitted on both sides of the fixing frame (22). The rotating rod (501) is fixedly connected to a worm gear (502) on the periphery inside the fixing frame (22). The inner wall of the annular groove (21) is rotatably fitted with a worm wheel (503) that meshes with the worm gear (502).

8. The electromagnetic compatibility testing motor loading device according to claim 7, characterized in that: The inner wall of the through hole (20) and the annular groove (21) is circumferentially arrayed with four positioning pins (504). The abutting ends of the four positioning pins (504) are located in the through hole (20) and cooperate with the output shaft of the motor under test. The inner diameter of the worm gear (503) is fixedly connected to an annular plate (505) that is rotatably fitted in the annular groove (21). The annular plate (505) is circumferentially arrayed with four linkage grooves (506). The outer ends of the four positioning pins (504) are respectively fixedly connected to connecting pins (507) that cooperate with the four linkage grooves (506).

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