A vibration testing device for electric motors

Abstract

This utility model relates to the field of electric motors and proposes an electric motor vibration testing device, including a mounting platform and a vibration mechanism. The vibration mechanism includes a working plate, with multiple telescopic rods connected to the top of the working plate. The tops of the telescopic rods are connected to the mounting platform. Three pairs of fixed plates are connected to the top of the working plate. Turntables are rotatably connected to two of the fixed plates, and a connecting rod is connected between the two turntables. The connecting rod is eccentrically connected to the turntable, and a connecting block is rotatably sleeved on the connecting rod. The connecting block is rotatably connected to the mounting platform. The three pairs of turntables, which are opposite each other, are connected by multiple belt drives. A first motor is mounted on one of the fixed plates, and the output end of the first motor passes through the fixed plate and is connected to the turntable. This device drives the three pairs of turntables to rotate synchronously by belt drive, thereby driving the eccentric connecting rod to move synchronously. This avoids the problem of uneven vibration caused by asynchronous transmission at the source, and ultimately makes the mounting platform produce stable and uniform vibration.

Description

Technical Field

[0001] This utility model relates to the field of electric motors, and more specifically to an electric motor vibration testing device. Background Technology

[0002] In the field of electric motor production and performance testing, vibration characteristics are key indicators for evaluating the operational stability, lifespan, and failure risk of electric motors. Therefore, electric motor vibration testing equipment has become a core component, requiring two main requirements: providing a stable and uniform vibration environment for the motor to obtain accurate data, and flexibly adjusting the mounting platform height to adapt to different testing scenarios. However, current equipment has significant shortcomings. Regarding vibration uniformity control, existing solutions mostly employ a single-motor driven eccentric structure or multiple motors driven separately. Single-motor systems are limited by power output and struggle to handle high loads and wide frequency range testing; multiple motor systems, lacking a reliable synchronous transmission mechanism, are prone to speed deviations and transmission component gaps, leading to asynchronous operation of the eccentric vibration sources. This causes fluctuations in the vibration amplitude and phase shift of the mounting platform, resulting in large data dispersion and even misjudgments of motor quality.

[0003] Regarding the height adjustment of the mounting platform, traditional manual methods are not only labor-intensive and cumbersome, but also often have adjustment errors exceeding ±5mm, failing to meet the high-precision testing requirements of miniature precision motors. While some automatic adjustment methods use motor drives, single-screw drives are prone to uneven force distribution leading to platform tilting, and dual-screw drives require additional complex mechanisms to coordinate speeds, still making asynchronous adjustments difficult to avoid, resulting in poor device compatibility. In summary, the current devices' shortcomings in vibration source synchronization control and the accuracy and convenience of height adjustment have become bottlenecks restricting the reliability and compatibility of motor testing. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the prior art, the present invention provides a motor vibration testing device to solve the problems of the prior art mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a motor vibration testing device, including a mounting platform, and further comprising:

[0008] A vibration mechanism includes a working plate, with multiple telescopic rods fixedly connected to the top of the working plate. The tops of the telescopic rods are connected to a mounting platform. Three pairs of fixed plates are fixedly connected to the top of the working plate in a front-to-back manner. Turntables are rotatably connected to two of the front-to-back fixed plates. A connecting rod is fixedly connected between two of the front-to-back turntables. The connecting rod is eccentrically connected to the turntable. A connecting block is rotatably sleeved on the connecting rod. The connecting block is rotatably connected to the mounting platform. The three pairs of front-to-back turntables are connected by multiple belt drives. A first motor is mounted on one of the fixed plates. The output end of the first motor passes through the fixed plate and is connected to the turntable.

[0009] A lifting mechanism is provided, which is connected to the working plate.

[0010] Optionally, the lifting mechanism includes a base, with two adjusting plates slidably connected to the top of the base, and a connecting plate rotatably connected to the top of the adjusting plates. The connecting plate is rotatably connected to the working plate. Two support plates are fixedly connected to the top of the base, and a second motor is mounted on the support plate. The output end of the second motor passes through the support plate and is connected to a double-headed reverse screw. The other end of the double-headed reverse screw passes through the two adjusting plates and is rotatably connected to another support plate. The double-headed reverse screw is threadedly connected to the two adjusting plates.

[0011] Optionally, a plurality of springs are fixedly connected between the mounting platform and the working plate.

[0012] Optionally, each of the two support plates has two guide holes, and a guide rod is slidably connected in the guide holes. The guide rod is fixedly connected to the working plate.

[0013] Optionally, the mounting platform is provided with multiple threaded holes.

[0014] Optionally, the bottom end of the base is fixedly connected to multiple support legs.

[0015] (III) Beneficial Effects

[0016] In summary, this utility model has at least one of the following beneficial technical effects:

[0017] This electric motor vibration testing device enables three pairs of turntables to rotate synchronously via belt drive, which in turn drives the eccentrically connected connecting rod to move synchronously. This fundamentally avoids the problem of uneven vibration caused by asynchronous transmission, resulting in stable and uniform vibration of the mounting platform. The second motor drives a double-headed reverse screw, which drives two adjusting plates to slide synchronously in opposite directions. This, in turn, pushes the working plate and mounting platform to rise and fall smoothly via the connecting plate. Compared with the traditional manual adjustment method, this not only saves the trouble of manual operation, but also allows for precise control of the lifting height, avoiding errors from manual adjustment, and is suitable for different testing scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the disassembled structure of this utility model;

[0019] Figure 2 This utility model Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0020] Figure 3 This utility model Figure 1 A magnified schematic diagram of the local structure at point B;

[0021] Figure 4 This is a schematic diagram of the overall structure of this utility model.

[0022] In the diagram: 1. Mounting platform; 2. Working plate; 3. Telescopic rod; 4. Fixing plate; 5. Turntable; 6. Connecting rod; 7. Connecting block; 8. Belt; 9. First motor; 10. Base; 11. Adjusting plate; 12. Connecting plate; 13. Support plate; 14. Second motor; 15. Double-ended reverse screw; 16. Spring; 17. Guide rod; 18. Threaded hole; 19. Support leg. 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] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Reference Figures 1-4A motor vibration testing device includes a mounting platform 1 with multiple threaded holes 18. These holes facilitate the secure fixing of the motor to be tested onto the mounting platform 1 using bolts, preventing displacement of the motor during vibration testing. The multiple threaded holes 18 can also accommodate motors of different sizes and mounting positions, improving the device's versatility and applicability. The device also includes a vibration mechanism, comprising a working plate 2. Multiple telescopic rods 3 are fixedly connected to the top of the working plate 2, with their tops connected to the mounting platform 1. Three pairs of fixed plates 4 are fixedly connected to the top of the working plate 2, one pair at a time. A turntable 5 is rotatably connected to each of the two opposing fixed plates 4. A connecting rod 6 is fixedly connected between the two opposing turntables 5, and the connecting rod 6 is eccentrically connected to the turntable 5. A connecting block 7 is rotatably sleeved on the connecting rod 6, and the connecting block 7 is rotatably connected to the mounting platform 1. Three pairs of turntables 5 facing each other are connected by multiple belts 8. A first motor 9 is installed on one of the fixed plates 4, and the output end of the first motor 9 passes through the fixed plate 4 and is connected to the turntable 5. The telescopic rod 3 can guide the movement of the mounting platform 1 to ensure that the mounting platform 1 is not easily deviated when vibrating. The three pairs of turntables 5 are driven by the belts 8 to rotate synchronously, driving the eccentrically connected connecting rod 6 to move synchronously, which can make the mounting platform 1 produce stable and uniform vibration. The first motor 9 provides power for vibration, and the power output is stable, which makes it easy to control the vibration frequency and amplitude. Multiple springs 16 are fixedly connected between the mounting platform 1 and the working plate 2 to assist the mounting platform 1 to quickly reset after vibration, further ensuring the stability and regularity of vibration.

[0026] It should also be noted that the lifting mechanism is connected to the work plate 2. The lifting mechanism includes a base 10, and multiple support legs 19 are fixedly connected to the bottom end of the base 10. The support legs 19 can support the entire device, preventing the base 10 from directly contacting the ground, reducing the corrosion of the base 10 by ground moisture and stains, and extending the service life of the device. Two adjusting plates 11 are slidably connected to the top of the base 10, and a connecting plate 12 is rotatably connected to the top of the adjusting plates 11. The connecting plate 12 is rotatably connected to the work plate 2. Two support plates 13 are fixedly connected to the top of the base 10. A second motor 14 is installed on the support plate 13. The output end of the second motor 14 passes through the support plate 13 and is connected to a double-headed reverse screw 15. The other end of the rod 15 passes through two adjusting plates 11 and is rotatably connected to another support plate 13. The double-headed reverse screw 15 is threadedly connected to the two adjusting plates 11. When the double-headed reverse screw 15 rotates, it can drive the two adjusting plates 11 to slide synchronously in opposite directions. The working plate 2 is pushed to rise and fall through the connecting plate 12. The second motor 14 drives the adjustment instead of manual adjustment, which is highly automated, saves manpower, and facilitates precise control of the lifting height of the working plate 2, adapting to the needs of different testing scenarios. Two guide holes are opened on both support plates 13. A guide rod 17 is slidably connected in the guide hole. The guide rod 17 is fixedly connected to the working plate 2. The guide rod 17 slides with the guide hole, which can limit and guide the lifting direction of the working plate 2.

[0027] In summary, the working principle and process of this motor vibration testing device are as follows: First, the motor to be tested is placed on the mounting platform 1. Then, a threaded hole 18 that is perfectly aligned with the motor mounting hole is selected, ensuring precise alignment between the motor mounting hole and the selected threaded hole 18. The bolts are then tightened. Next, the second motor 14 is started. The second motor 14 adjusts the angle of the connecting plate 12 through the cooperation of the double-headed reverse screw 15 and the two adjusting plates 11, causing the working plate 2 to lift the mounting platform 1. Then, the first motor 9 is turned on, causing the motor on the mounting platform 1 to vibrate through the cooperation of three pairs of turntables 5, belts 8, and connecting blocks 7 for testing. Simultaneously, by changing the speed of the first motor 9, the rotation frequency of the turntables 5 is adjusted, thereby changing the vibration frequency of the mounting platform 1.

[0028] The above embodiments merely illustrate specific implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A motor vibration testing device, comprising a mounting platform (1), characterized in that: Also includes: The vibration mechanism includes a working plate (2), a plurality of telescopic rods (3) are fixedly connected to the top of the working plate (2), the top of the plurality of telescopic rods (3) are connected to the mounting platform (1), three pairs of fixed plates (4) are fixedly connected to the top of the working plate (2) in a front-to-back manner, a turntable (5) is rotatably connected to the two front-to-back fixed plates (4), a connecting rod (6) is fixedly connected between the two front-to-back turntables (5), the connecting rod (6) is eccentrically connected to the turntable (5), a connecting block (7) is rotatably sleeved on the connecting rod (6), the connecting block (7) is rotatably connected to the mounting platform (1), the three pairs of front-to-back turntables (5) are connected by a plurality of belts (8), a first motor (9) is installed on one of the fixed plates (4), the output end of the first motor (9) passes through the fixed plate (4) and is connected to the turntable (5); A lifting mechanism is connected to the working plate (2).

2. The electric motor vibration testing device according to claim 1, characterized in that: The lifting mechanism includes a base (10), with two adjusting plates (11) slidably connected to the top of the base (10). A connecting plate (12) is rotatably connected to the top of the adjusting plate (11). The connecting plate (12) is rotatably connected to the working plate (2). Two support plates (13) are fixedly connected to the top of the base (10). A second motor (14) is installed on the support plate (13). The output end of the second motor (14) passes through the support plate (13) and is connected to a double-headed reverse screw (15). The other end of the double-headed reverse screw (15) passes through the two adjusting plates (11) and is rotatably connected to another support plate (13). The double-headed reverse screw (15) is threadedly connected to the two adjusting plates (11).

3. The electric motor vibration testing device according to claim 1, characterized in that: Multiple springs (16) are fixedly connected between the mounting platform (1) and the working plate (2).

4. The electric motor vibration testing device according to claim 2, characterized in that: Two guide holes are provided on each of the two support plates (13), and guide rods (17) are slidably connected in the guide holes. The guide rods (17) are fixedly connected to the working plate (2).

5. The electric motor vibration testing device according to claim 1, characterized in that: The mounting platform (1) is provided with multiple threaded holes (18).

6. The electric motor vibration testing device according to claim 2, characterized in that: The bottom end of the base (10) is fixedly connected to multiple support legs (19).

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