Motor magnetic steel dynamic balance testing device

Abstract

The utility model discloses a motor magnetic steel dynamic balance testing device, which belongs to the technical field of motor detection and comprises a testing platform, a bottom supporting plate is fixed at the top of the testing platform, and a top supporting plate is rotatably connected to the top of the bottom supporting plate. Motor shaft supporting plates are slidably connected to the two ends of the top of the testing platform, a limiting mechanism used for limiting rotation of the top supporting plate is arranged at one end of the outer side of the top supporting plate, and through operation of an adjusting mechanism and a driving motor, a belt can drive a rotor to rotate in the bottom supporting plate and the top supporting plate. Rotors with different diameters can rotate, the problem of rotating speed fluctuation or slipping caused by belt looseness after long-term use can be avoided, the rotors are ensured to rotate at a constant speed, dynamic balance detection data are more reliable, the supporting distance between the two motor shaft supporting plates can be rapidly adjusted, and the device is adaptive to the motor rotors with different lengths.

Description

Technical Field

[0001] This utility model belongs to the field of motor testing technology, specifically relating to a dynamic balancing test device for motor magnets. Background Technology

[0002] In the motor manufacturing process, the assembly quality of the magnets directly affects the smoothness of the motor's operation and its service life. Uneven magnet bonding or weight distribution deviations can lead to poor rotor dynamic balance, causing problems such as vibration, noise, and even bearing wear. Therefore, dynamic balance testing of the motor rotor is a crucial step in the production process.

[0003] Common dynamic balancing testing devices mainly employ a fixed support structure, using a drive mechanism to rotate the rotor and measuring the imbalance using vibration sensors or photoelectric detection equipment. Traditional testing benches typically have a fixed support structure, making it difficult to adapt to rotors of different lengths. This necessitates changing fixtures or adjusting equipment when testing different motor models, resulting in low efficiency. Some devices use belt drives, but lack tension adjustment mechanisms, leading to belt loosening over time, affecting speed accuracy and testing reliability. Therefore, we designed a dynamic balancing testing device for motor magnets to provide an alternative technical solution to the aforementioned problems. Utility Model Content

[0004] The purpose of this invention is to provide a dynamic balancing test device for motor magnets to solve the problems mentioned in the background section regarding the use of existing technologies.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dynamic balancing test device for motor magnets, comprising a test platform, a bottom support plate fixed to the top of the test platform, a top support plate rotatably connected to the top of the bottom support plate, motor shaft support plates slidably connected to both ends of the top of the test platform, and a limiting mechanism for limiting the rotation of the top support plate provided at one end of the outer side of the top support plate.

[0006] A drive motor is bolted to one end of the bottom support plate away from the top support plate. A drive pulley is fixed to the output end of the drive motor. A first pulley is rotatably connected to one end of the top support plate. A movable second pulley is provided on one side of one end of the top support plate. An adjustment mechanism for adjusting the position of the second pulley is provided at the other end of the top support plate. A third pulley is provided at one end of the bottom of the top support plate. A belt is fitted around the drive pulley, the first pulley, the second pulley, and the third pulley.

[0007] A U-shaped support frame is fixed to the outside of the test platform. A laser detector, which is a photoelectric phase sensor, is rotatably connected to the top of the U-shaped support frame via a pin.

[0008] Preferably, the limiting mechanism includes an L-shaped mounting block, which is fixed to one end of the top support plate. The L-shaped mounting block has a transverse threaded rod internally threaded, and a transverse rotating rod is fixed to one end of the transverse threaded rod. A rectangular limiting pin is slidably connected internally to the L-shaped mounting block, and a circular limiting compression block is fixed to the end of the transverse threaded rod near the rectangular limiting pin. The third pulley is located inside the L-shaped mounting block and is rotatably connected to the L-shaped mounting block via a bearing.

[0009] Preferably, the bottom support plate has an arc-shaped groove inside, and the rectangular limiting pin is located inside the arc-shaped groove and is movably connected to the bottom support plate through the arc-shaped groove.

[0010] Preferably, a bottom mounting plate is fixed to the bottom of the motor shaft support plate, and T-shaped sliders are fixed to both ends of the bottom of the bottom mounting plate. The test platform has a T-shaped groove adapted to the T-shaped slider inside. The bottom mounting plate and the test platform are slidably connected by the cooperation of the T-shaped slider and the T-shaped groove.

[0011] Preferably, the adjusting mechanism includes an L-shaped fixing plate, one end of which is near the top support plate and fixedly connected to the top support plate. A handwheel is rotatably connected inside the L-shaped fixing plate, and a vertical threaded rod is fixed to the bottom of the handwheel. A transverse connecting shaft is fixed to one end of the vertical sliding block near the second pulley, and the transverse connecting shaft is rotatably connected to the second pulley via a bearing.

[0012] Preferably, the top support plate has an inclined groove inside, and the transverse connecting shaft is located inside the inclined groove and is slidably connected to the top support plate through the inclined groove.

[0013] Preferably, the vertical sliding block has a vertical dovetail slider internally connected to it, and the vertical dovetail slider is located near one end of the L-shaped fixing plate and is fixedly connected to the L-shaped fixing plate.

[0014] Preferably, both ends of the bottom mounting plate are threaded with vertical bolts, and a vertical limiting compression block is fixed to the bottom of the vertical bolts.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the operation of the adjustment mechanism and the drive motor, enables the belt to drive the rotor to rotate inside the bottom support plate and the top support plate, which can adapt to rotors of different diameters, avoid speed fluctuations or slippage caused by belt loosening after long-term use, ensure uniform rotor rotation, and make the dynamic balance test data more reliable; the support distance between the two motor shaft support plates can be quickly adjusted to adapt to motor rotors of different lengths without changing the clamps, significantly improving the testing efficiency; the laser detector uses a photoelectric phase sensor to capture the reference phase of the rotor rotation in real time, accurately mark the angular position where the imbalance occurs, and through optical non-contact detection, it is not affected by the motor's electromagnetic field, oil stains, or temperature, resulting in higher detection accuracy. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 is a schematic diagram of the structure of the U-shaped support frame and the laser detector of this utility model;

[0018] Figure 3 is a structural schematic diagram of the bottom support plate and the top support plate of this utility model;

[0019] Figure 4 is a schematic diagram of the handwheel and vertical threaded rod of this utility model;

[0020] Figure 5 is a structural schematic diagram of the transverse rotating rod and the transverse threaded rod of this utility model;

[0021] Figure 6 is a structural schematic diagram of the vertical bolt and the vertical limiting extrusion block of this utility model.

[0022] In the diagram: 1. Test platform; 2. Bottom support plate; 3. Top support plate; 4. Motor shaft support plate; 5. Drive motor; 6. U-shaped support frame; 7. Laser detector; 8. Drive pulley; 9. First pulley; 10. Second pulley; 11. Third pulley; 12. L-shaped fixing plate; 13. Handwheel; 14. Vertical threaded rod; 15. Vertical sliding block; 16. L-shaped mounting block; 17. Rectangular limit pin; 18. Horizontal rotating rod; 19. Horizontal threaded rod; 20. Circular limit pressing block; 21. Bottom mounting plate; 22. Vertical bolt; 23. Vertical limit pressing block; 24. Horizontal connecting shaft. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Referring to Figures 1-6, a dynamic balancing test device for motor magnets includes a test platform 1, a bottom support plate 2 fixed to the top of the test platform 1, a top support plate 3 rotatably connected to the top of the bottom support plate 2, motor shaft support plates 4 slidably connected to both ends of the top of the test platform 1, and a limiting mechanism for limiting the rotation of the top support plate 3 is provided at one end of the outer side of the top support plate 3.

[0025] A drive motor 5 is bolted to one end of the bottom support plate 2 away from the top support plate 3. A drive pulley 8 is fixed to the output end of the drive motor 5. A first pulley 9 is rotatably connected to one end of the top support plate 3. A movable second pulley 10 is provided on one side of one end of the top support plate 3. An adjustment mechanism for adjusting the position of the second pulley 10 is provided on the other end of the top support plate 3. A third pulley 11 is provided at one end of the bottom of the top support plate 3. A belt is fitted on the outer side of the drive pulley 8, the first pulley 9, the second pulley 10 and the third pulley 11.

[0026] A U-shaped support frame 6 is fixed on the outside of the test platform 1. A laser detector 7 is rotatably connected to the top of the U-shaped support frame 6 via a pin. The laser detector 7 is a photoelectric phase sensor. The photoelectric phase sensor plays a key role in the motor dynamic balance detection system. It captures the reference phase of the rotor rotation in real time, accurately marks the angular position where the imbalance occurs, and is unaffected by the motor's electromagnetic field, oil, or temperature through optical non-contact detection.

[0027] The limiting mechanism includes an L-shaped mounting block 16, which is fixed to one end of the top support plate 3. A transverse threaded rod 19 is threaded inside the L-shaped mounting block 16. A transverse rotating rod 18 is fixed to one end of the transverse threaded rod 19. A rectangular limiting pin 17 is slidably connected inside the L-shaped mounting block 16. A circular limiting pressing block 20 is fixed to one end of the transverse threaded rod 19 near the rectangular limiting pin 17. A third pulley 11 is located inside the L-shaped mounting block 16 and is rotatably connected to the L-shaped mounting block 16 through a bearing.

[0028] The bottom support plate 2 has an arc-shaped groove inside. The rectangular limiting pin 17 is located inside the arc-shaped groove and is movably connected to the bottom support plate 2 through the arc-shaped groove. The arc-shaped groove allows the top support plate 3 to rotate at the top of the bottom support plate 2. When the rectangular limiting pin 17 is in close contact with the bottom support plate 2, it can restrict the rotation of the top support plate 3 at one end of the bottom support plate 2.

[0029] Here, the motor rotor is placed between two motor shaft support plates 4, and then the top support plate 3 is rotated so that the belt is placed on the outer side of the top of the rotor, thereby allowing the rectangular limiting pin 17 to rotate into the interior of the bottom support plate 2, pushing the rectangular limiting pin 17 to move inside the L-shaped mounting block 16, so that the rectangular limiting pin 17 can fit against the surface of the bottom support plate 2. Then, the transverse rotating rod 18 is rotated, and the rotation of the transverse rotating rod 18 allows the transverse threaded rod 19 to rotate inside the L-shaped mounting block 16, thereby allowing the circular limiting pressing block 20 to fit against the rectangular limiting pin 17, restricting the movement of the rectangular limiting pin 17 inside the L-shaped mounting block 16, so that the top support plate 3 can be fixed to one end of the bottom support plate 2. Through the operation of the drive motor 5, the drive pulley 8 can rotate, and the rotation of the drive pulley 8 allows the motor rotor to rotate on the top of the two motor shaft support plates 4. The motor rotor can be detected in real time by the laser detector 7.

[0030] The adjustment mechanism includes an L-shaped fixing plate 12, which is fixedly connected to the top support plate 3 at one end. A handwheel 13 is rotatably connected inside the L-shaped fixing plate 12. A vertical threaded rod 14 is fixed to the bottom of the handwheel 13. A transverse connecting shaft 24 is fixed to the end of the vertical sliding block 15 near the second pulley 10. The transverse connecting shaft 24 is rotatably connected to the second pulley 10 via a bearing at one end.

[0031] The top support plate 3 has an inclined groove inside. The transverse connecting shaft 24 is located inside the inclined groove and is slidably connected to the top support plate 3 through the inclined groove. The inclined groove allows the transverse connecting shaft 24 to slide obliquely inside the top support plate 3, thereby allowing the second pulley 10 to be adjusted in position.

[0032] The vertical sliding block 15 is internally slidably connected to a vertical dovetail slider. The vertical dovetail slider is close to one end of the L-shaped fixed plate 12 and is fixedly connected to the L-shaped fixed plate 12. By rotating the vertical threaded rod 14, the vertical sliding block 15 can slide vertically on the outside of the vertical dovetail slider.

[0033] Here, when the belt is loose and cannot drive the rotor to rotate, the handwheel 13 is rotated. The rotation of the handwheel 13 causes the vertical threaded rod 14 to rotate. The rotation of the vertical threaded rod 14 causes the vertical sliding block 15 to move inside the L-shaped fixed plate 12. In turn, the vertical sliding block 15 drives the second pulley 10 to move through the transverse connecting shaft 24, thereby adjusting the belt tension so that the operation of the drive motor 5 can drive the rotor to rotate. This allows the device to adapt to rotors of different diameters.

[0034] A bottom mounting plate 21 is fixed to the bottom of the motor shaft support plate 4. T-shaped sliders are fixed to both ends of the bottom of the bottom mounting plate 21. The test platform 1 has a T-shaped groove adapted to the T-shaped slider inside. The bottom mounting plate 21 and the test platform 1 are slidably connected by the cooperation of the T-shaped slider and the T-shaped groove. By setting the T-shaped slider and the T-shaped groove, the bottom mounting plate 21 can move on the top of the test platform 1, thereby allowing the two motor shaft support plates 4 to move on the top of the test platform 1.

[0035] Both ends of the bottom mounting plate 21 are threaded with vertical bolts 22. A vertical limiting compression block 23 is fixed to the bottom of the vertical bolts 22. By rotating the vertical bolts 22, the vertical limiting compression block 23 can move toward the inside of the test platform 1. When the vertical limiting compression block 23 abuts against the test platform 1, it can restrict the movement of the motor shaft support plate 4 on the top of the test platform 1.

[0036] Here, by rotating the vertical bolt 22, the vertical bolt 22 can rotate inside the bottom mounting plate 21. When the vertical limiting compression block 23 disengages from the inside of the test platform 1, the motor shaft support plate 4 can move at the top of the test platform 1. When the vertical bolt 22 drives the vertical limiting compression block 23 to fit tightly against the test platform 1, the position of the motor shaft support plate 4 at the top of the test platform 1 can be restricted, so that the device can support rotors of different lengths.

[0037] Working principle: By rotating the vertical bolt 22, the distance between the two motor shaft support plates 4 is adjusted to match the length of the rotor to be tested. Then, the rotor is placed between the two motor shaft support plates 4. The top support plate 3 is rotated so that the belt fits against the top of the rotor, pushing the rectangular limit pin 17 into the arc-shaped groove of the bottom support plate 2. The horizontal rotating rod 18 is rotated to drive the circular limit pressing block 20 to press the rectangular limit pin 17 through the horizontal threaded rod 19, thus fixing the top support plate 3. The drive motor 5 is started, and the rotor is driven to rotate at a constant speed through the drive pulley 8 and the belt. The laser detector 7 captures the rotor rotation phase in real time and marks the unbalance and angular position. If the belt is loose, the handwheel 13 is rotated to drive the vertical threaded rod 14 to rotate, which drives the vertical sliding block 15 and the horizontal connecting shaft 24 to move. The belt tension is adjusted through the second pulley 10 to ensure stable rotor speed and reliable test data.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dynamic balancing testing device for motor magnets, characterized in that: The test platform (1) includes a bottom support plate (2) fixed to the top of the test platform (1), a top support plate (3) rotatably connected to the top of the bottom support plate (2), and motor shaft support plates (4) slidably connected to both ends of the top of the test platform (1). A limiting mechanism for restricting the rotation of the top support plate (3) is provided at one end of the outer side of the top support plate (3). A drive motor (5) is bolted to one end of the bottom support plate (2) away from the top support plate (3), and a drive pulley is fixed to the output end of the drive motor (5). 8) A first pulley (9) is rotatably connected to one end of the top of the top support plate (3), a movable second pulley (10) is provided on one side of one end of the top support plate (3), an adjustment mechanism for adjusting the position of the second pulley (10) is provided at the other end of the top support plate (3), a third pulley (11) is provided at one end of the bottom of the top support plate (3), and belts are sleeved on the outer sides of the drive pulley (8), the first pulley (9), the second pulley (10) and the third pulley (11); a U-shaped support frame (6) is fixed on the outer side of the test platform (1), and a laser detector (7) is rotatably connected to the top of the U-shaped support frame (6) through a pin shaft. The laser detector (7) is a photoelectric phase sensor.

2. The dynamic balance testing device for motor magnetic steel according to claim 1, characterized in that: The limiting mechanism includes an L-shaped mounting block (16), which is fixed to one end of the top support plate (3). The L-shaped mounting block (16) is internally threaded with a transverse threaded rod (19). One end of the transverse threaded rod (19) is fixed with a transverse rotating rod (18). The L-shaped mounting block (16) is internally slidably connected with a rectangular limiting pin (17). The transverse threaded rod (19) is fixed with a circular limiting compression block (20) at the end near the rectangular limiting pin (17). The third pulley (11) is located inside the L-shaped mounting block (16) and is rotatably connected to the L-shaped mounting block (16) through a bearing.

3. The dynamic balance testing device for a magnetic steel of an electric machine according to claim 2, characterized in that: The bottom support plate (2) has an arc-shaped groove inside, and the rectangular limiting pin (17) is located inside the arc-shaped groove and is movably connected to the bottom support plate (2) through the arc-shaped groove.

4. The dynamic balance testing device for a magnetic steel of an electric machine according to claim 1, characterized in that: The bottom of the motor shaft support plate (4) is fixed with a bottom mounting plate (21). Both ends of the bottom of the bottom mounting plate (21) are fixed with T-shaped sliders. The test platform (1) has a T-shaped groove inside that is adapted to the T-shaped slider. The bottom mounting plate (21) and the test platform (1) are slidably connected by the cooperation of the T-shaped slider and the T-shaped groove.

5. A dynamic balancing test device for a magnetic steel of an electric machine according to claim 4, characterized in that: The adjustment mechanism includes an L-shaped fixing plate (12), which is fixedly connected to the top support plate (3) at one end. A handwheel (13) is rotatably connected inside the L-shaped fixing plate (12). A vertical threaded rod (14) is fixed at the bottom of the handwheel (13). A horizontal connecting shaft (24) is fixed at one end of the vertical sliding block (15) near the second pulley (10). The horizontal connecting shaft (24) is rotatably connected to the second pulley (10) at one end near the second pulley (10) via a bearing.

6. The dynamic balancing testing device for the magnetic steel of the motor according to claim 5, characterized in that: The top support plate (3) has an inclined groove inside, and the transverse connecting shaft (24) is located inside the inclined groove and is slidably connected to the top support plate (3) through the inclined groove.

7. The dynamic balancing testing device for the magnetic steel of the motor according to claim 5, characterized in that: The vertical sliding block (15) is internally slidably connected to a vertical dovetail slider, which is close to one end of the L-shaped fixing plate (12) and is fixedly connected to the L-shaped fixing plate (12).

8. The dynamic balancing testing device for the magnetic steel of the motor according to claim 4, characterized in that: Both ends of the bottom mounting plate (21) are threaded with vertical bolts (22), and the bottom of the vertical bolts (22) is fixed with a vertical limiting compression block (23).

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