Permanent magnet synchronous motor air tightness detection tool

Abstract

This utility model belongs to the technical field of testing devices, and specifically relates to a fixture for testing the air tightness of permanent magnet synchronous motors. It includes a testing platform with a support frame mounted on it. A first electric push rod is mounted on the support frame, and a sealing cover is connected to the output end of the first electric push rod. An air inlet pipe is mounted on the sealing cover. An mounting plate is mounted on the testing platform via an electric slide rail, and an air compressor is mounted on the mounting plate. An exhaust pipe is connected to the air compressor, and a first connecting component for testing the air tightness of the motor housing is mounted on the exhaust pipe. A second connecting component for testing the air tightness of water pipes is also mounted on the exhaust pipe. This utility model, through its integrated structural design, effectively solves the problems of low efficiency and poor accuracy of traditional testing methods, significantly improving testing efficiency and accuracy. It also possesses multi-functional adaptability and flexible adjustment capabilities, solving the problems of single function and poor adaptability of existing semi-automatic equipment.

Description

Technical Field

[0001] This utility model belongs to the field of testing device technology, and specifically relates to a tooling for testing the air tightness of permanent magnet synchronous motors. Background Technology

[0002] In fields such as new energy vehicles, industrial automation, and rail transportation, permanent magnet synchronous motors (PMSMs) have become core drive components due to their significant advantages of high efficiency, high power density, and high reliability. However, during operation, critical components of PMSMs, such as the stator and rotor, are extremely sensitive to moisture, dust, and other impurities. If there are sealing defects in the motor casing or water pipe interfaces, external moisture and dust can easily penetrate the motor, leading to decreased winding insulation performance, bearing corrosion and wear, and in severe cases, short circuits and jamming, directly affecting the operational safety and service life of the equipment. Therefore, in the manufacturing process of PMSMs, the airtightness testing of the motor casing and associated water pipes is a crucial step in ensuring product quality. The accuracy and efficiency of this testing directly determine the motor's factory pass rate and production cycle.

[0003] Currently, the industry's methods for testing the airtightness of permanent magnet synchronous motors are mainly divided into two categories: traditional manual testing and semi-automatic testing. Traditional manual testing often uses the immersion method, where operators immerse the motor casing or water pipe assembly in water and manually introduce compressed air into the interior, judging the airtightness by observing whether bubbles appear on the water surface. Although this method is simple to operate and has low equipment costs, it has significant drawbacks: on the one hand, the test results are highly dependent on the operator's visual judgment, and tiny bubbles caused by minor leaks are prone to being missed or misjudged, making it difficult to meet the quality control requirements of high-precision motors; on the other hand, the motor assembly after immersion requires additional drying, which not only increases production processes and time costs but may also leave residual moisture inside the motor due to incomplete drying, creating potential hazards for subsequent use. Therefore, those skilled in the art have provided a tooling for testing the airtightness of permanent magnet synchronous motors to solve the problems mentioned in the background art. Summary of the Invention

[0004] The present invention aims to provide a tooling for testing the airtightness of permanent magnet synchronous motors, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: The airtightness testing fixture for permanent magnet synchronous motors includes: A testing table, on which a support frame is installed, and a first electric push rod is provided on the support frame. The output end of the first electric push rod is connected to a sealing cover, and an air inlet pipe is provided on the sealing cover. The testing platform is connected to a placement plate via a rotating assembly, and the placement plate holds a clamping assembly for holding the motor housing. The testing platform is equipped with a mounting plate via an electric slide rail. An air compressor is mounted on the mounting plate. An exhaust pipe is connected to the air compressor. The exhaust pipe is equipped with a first connecting component for testing the airtightness of the motor housing and a second connecting component for testing the airtightness of the water pipe.

[0006] Preferably, the rotating assembly includes a drive motor and a support frame. The support frame is mounted on the detection table, the drive motor is mounted inside the support frame, the support frame is rotatably connected to the placement disk, and the output end of the drive motor is connected to the placement disk.

[0007] Preferably, the clamping assembly includes two side plates, two second electric push rods, two connecting plates, two pressure sensors, and a clamping plate. The two side plates are fixedly installed on both sides of the placement tray, the two second electric push rods are fixedly installed on the side plates, the output ends of the two electric push rods are connected to the connecting plates, and the pressure sensors are installed between the connecting plates and the clamping plates.

[0008] Preferably, the placement tray has a first rubber layer, and the clamping plate has a second rubber layer.

[0009] Preferably, the first connecting assembly includes a first connecting pipe, a first solenoid valve, a first air pressure sensor, and a first pagoda head. The first connecting pipe is connected to the exhaust pipe via a tee. The first solenoid valve and the first air pressure sensor are both mounted on the first connecting pipe, and the first pagoda head is connected to the first connecting pipe.

[0010] Preferably, the second connecting assembly includes a second connecting pipe, a second solenoid valve, a second pressure sensor, and a second pagoda head. The second connecting pipe is connected to the exhaust pipe via a tee. The second solenoid valve and the second pressure sensor are both mounted on the second connecting pipe, and the second pagoda head is connected to the second connecting pipe.

[0011] Preferably, a controller is installed on the testing platform, and the controller is electrically connected to the first electric push rod, the electric slide rail, the air compressor, the second electric push rod, the pressure sensor, the first solenoid valve, the first air pressure sensor, the second solenoid valve, and the second air pressure sensor.

[0012] The main beneficial effects of adopting the above technical solution are as follows: 1. This utility model, through its integrated structural design, effectively solves the problems of low efficiency and poor accuracy of traditional detection methods, significantly improving detection efficiency and accuracy. Compared with the traditional immersion method, which relies on manual observation and is prone to missed or misjudgments, this fixture uses a first electric push rod to drive the sealing cover to achieve automatic sealing of the motor housing. With the stable air supply from the air compressor, a closed-loop detection path can be formed through the air inlet and exhaust pipes, eliminating the need for manual intervention in the sealing and ventilation process and avoiding human error.

[0013] 2. This utility model possesses multi-functional adaptability and flexible adjustment capabilities, solving the problems of limited functionality and poor adaptability of existing semi-automatic equipment. On one hand, the placement tray can be adjusted to multiple angles via the rotating component, and together with the clamping component, it can stably fix motor housings of different specifications, eliminating the need for frequent tooling changes and thus expanding its adaptability. On the other hand, the exhaust pipe is equipped with both a first connecting component and a second connecting component, which can respectively connect to the motor housing and the matching water pipe, enabling simultaneous testing of the motor housing and the airtightness of the water pipe using the same tooling. This eliminates the need for multiple sets of equipment, reducing equipment investment costs and floor space. Furthermore, the mounting plate can be flexibly adjusted in position via an electric slide rail, facilitating connection to different testing interfaces, further improving operational flexibility and equipment utilization, and better meeting the diverse testing needs of large-scale production. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the airtightness testing fixture for permanent magnet synchronous motors in the embodiments of this application; Figure 2 This is a cross-sectional view of the airtightness testing fixture for a permanent magnet synchronous motor in an embodiment of this application. Figure 3 for Figure 2 Enlarged view of point A in the middle; In the diagram: 1. Testing platform; 2. Support frame; 3. First electric push rod; 4. Sealing cover; 5. Air inlet pipe; 6. Placement tray; 7. Electric slide rail; 8. Mounting plate; 9. Air compressor; 10. Exhaust pipe; 11. Drive motor; 12. Support frame; 13. Side plate; 14. Second electric push rod; 15. Connecting plate; 16. Pressure sensor; 17. Clamping plate; 18. First rubber layer; 19. Second rubber layer; 20. First connecting pipe; 21. First solenoid valve; 22. First air pressure sensor; 23. First pagoda head; 24. Second connecting pipe; 25. Second solenoid valve; 26. Second air pressure sensor; 27. Second pagoda head; 28. Controller. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. In the description of the present utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "horizontal", "vertical", etc. used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0016] Please see Figures 1-3This utility model provides a technical solution: The airtightness testing fixture for permanent magnet synchronous motors includes: Testing table 1, a support frame 2 is installed on the testing table 1, a first electric push rod 3 is provided on the support frame 2, a sealing cover 4 is connected to the output end of the first electric push rod 3, and an air inlet pipe 5 is provided on the sealing cover 4. A placement tray 6 is connected to the testing table 1 via a rotating assembly. A clamping assembly clamps the motor housing on the placement tray 6. The rotating assembly includes a drive motor 11 and a support frame 12. The support frame 12 is installed on the testing table 1, and the drive motor 11 is installed inside the support frame 12. The support frame 12 is rotatably connected to the placement tray 6, and the output end of the drive motor 11 is connected to the placement tray 6. The clamping assembly includes two side plates 13, two second electric push rods 14, two connecting plates 15, two pressure sensors 16, and a clamping plate 17. The two side plates 13 are fixedly installed on both sides of the placement tray 6, and the two second electric push rods 14 are fixedly installed on the side plates 13. The output ends of the two electric push rods are connected to the connecting plates 15. The pressure sensors 16 are installed between the connecting plates 15 and the clamping plate 17. A first rubber layer 18 is provided on the placement tray 6, and a second rubber layer 19 is provided on the clamping plate 17. During testing, the workpiece is first loaded and positioned: the permanent magnet synchronous motor housing to be tested is placed on the first rubber layer 18 of the placement tray 6. The controller 28 drives the second electric push rods 14 on both sides to extend, and through the connecting plate 15, the clamping plate 17 moves closer to the motor housing. During this process, the pressure sensor 16 of the clamping assembly monitors the clamping force in real time. When the preset threshold of 50-100N is reached, the controller 28 immediately controls the second electric push rods 14 to stop moving. This achieves adaptive clamping of motor housings of different specifications through the thrust of the mechanical execution layer and sensor feedback, and avoids workpiece scratches caused by direct metal contact between the second rubber layer 19 on the clamping plate 17 and the first rubber layer 18 of the placement tray 6, thus ensuring clamping stability and workpiece safety from the source.

[0017] On the detection table 1, a mounting plate 8 is installed through an electric slide rail 7. An air compressor 9 is installed on the mounting plate 8. An exhaust pipe 10 is connected to the air compressor 9. A first connection component for detecting the airtightness of the motor housing is provided on the exhaust pipe 10, and a second connection component for detecting the airtightness of the water pipe is provided on the exhaust pipe 10. The first connection component includes a first connecting pipe 20, a first solenoid valve 21, a first pressure sensor 22, and a first bell mouth 23. The first connecting pipe 20 is connected to the exhaust pipe 10 through a three-way joint. Both the first solenoid valve 21 and the first pressure sensor 22 are installed on the first connecting pipe 20. The first bell mouth 23 is connected to the first connecting pipe 20. The second connection component includes a second connecting pipe 24, a second solenoid valve 25, a second pressure sensor 26, and a second bell mouth 27. The second connecting pipe 24 is connected to the exhaust pipe 10 through a three-way joint. Both the second solenoid valve 25 and the second pressure sensor 26 are installed on the second connecting pipe 24. The second bell mouth 27 is connected to the second connecting pipe 24.

[0018] Subsequently, it enters the sealing and interface docking stage: The controller 28 starts the drive motor 11 of the rotating assembly, driving the placement tray 6 to rotate within the support frame 12 to the sealing detection station, so that the detection port of the motor housing is accurately aligned with the sealing cover 4; at the same time, the first electric push rod 3 extends, pushing the sealing cover 4 down to fit and seal with the detection port of the motor housing. Synchronously, the electric slide rail 7 drives the mounting plate 8 to move, so that the first bell mouth 23 (or the second bell mouth 27) on the exhaust pipe 10 docks with the ventilation port (or the supporting water pipe interface) of the motor housing. Through the angle adjustment of the rotating assembly and the translation adjustment of the electric slide rail 7, and the coordinated control of the mechanical execution layer, this series of actions realizes the automatic and accurate docking of the detection interface, laying a foundation for the subsequent construction of the detection path, and greatly reducing the error and time cost of manual alignment. <​​​In the above embodiment, a controller 28 is installed on the detection table 1. The controller 28 is electrically connected to the first electric push rod 3, the electric slide rail 7, the air compressor 9, the second electric push rod 14, the pressure sensor 16, the first solenoid valve 21, the first air pressure sensor 22, the second solenoid valve 25, and the second air pressure sensor 26.

[0021] It should be noted that the specific models and specifications of the controller 28, the first electric push rod 3, the electric slide rail 7, the air compressor 9, the second electric push rod 14, the pressure sensor 16, the first solenoid valve 21, the first air pressure sensor 22, the second solenoid valve 25, and the second air pressure sensor 26 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail.

[0022] It should be noted that in the present invention, the "connection" not specifically defined can be a fixed connection, a detachable connection, or an integral connection; those skilled in the art can make corresponding adjustments and changes according to the specific application.

[0023] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications and substitutions 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 claims and their equivalents.

Claims

1. A permanent magnet synchronous motor air tightness detection tool, characterized in that: include: A testing table (1) is provided with a support frame (2), and a first electric push rod (3) is provided on the support frame (2). The output end of the first electric push rod (3) is connected to a sealing cover (4), and an air inlet pipe (5) is provided on the sealing cover (4). The testing platform (1) is connected to a placement plate (6) via a rotating assembly, and the placement plate (6) has a clamping assembly that holds the motor housing. The testing platform (1) is equipped with an installation plate (8) via an electric slide rail (7). An air compressor (9) is installed on the installation plate (8). An exhaust pipe (10) is connected to the air compressor (9). The exhaust pipe (10) is provided with a first connecting component for testing the air tightness of the motor housing and a second connecting component for testing the air tightness of the water pipe.

2. The air-tightness detection tool for permanent magnet synchronous motor according to claim 1, characterized in that: The rotating assembly includes a drive motor (11) and a support frame (12). The support frame (12) is mounted on the testing table (1), and the drive motor (11) is mounted inside the support frame (12). The support frame (12) is rotatably connected to the placement plate (6), and the output end of the drive motor (11) is connected to the placement plate (6).

3. The airtightness testing fixture for permanent magnet synchronous motors according to claim 2, characterized in that: The clamping assembly includes two side plates (13), two second electric push rods (14), two connecting plates (15), two pressure sensors (16), and a clamping plate (17). The two side plates (13) are fixedly installed on both sides of the placement tray (6), and the two second electric push rods (14) are fixedly installed on the side plates (13). The output ends of the two electric push rods are connected to the connecting plates (15), and the pressure sensors (16) are installed between the connecting plates (15) and the clamping plate (17).

4. The air-tightness detection tool for permanent magnet synchronous motor according to claim 3, characterized in that: The placement tray (6) is provided with a first rubber layer (18), and the clamping plate (17) is provided with a second rubber layer (19).

5. The air-tightness detection tool for permanent magnet synchronous motor according to claim 4, characterized in that: The first connecting assembly includes a first connecting pipe (20), a first solenoid valve (21), a first air pressure sensor (22), and a first pagoda head (23). The first connecting pipe (20) is connected to the exhaust pipe (10) via a tee. The first solenoid valve (21) and the first air pressure sensor (22) are both mounted on the first connecting pipe (20). The first pagoda head (23) is connected to the first connecting pipe (20).

6. The air-tightness detection tool for permanent magnet synchronous motor according to claim 5, characterized in that: The second connecting assembly includes a second connecting pipe (24), a second solenoid valve (25), a second air pressure sensor (26), and a second pagoda head (27). The second connecting pipe (24) is connected to the exhaust pipe (10) via a tee. The second solenoid valve (25) and the second air pressure sensor (26) are both mounted on the second connecting pipe (24). The second pagoda head (27) is connected to the second connecting pipe (24).

7. The air-tightness detection tool for permanent magnet synchronous motor according to claim 6, characterized in that: The testing platform (1) is equipped with a controller (28), which is electrically connected to the first electric push rod (3), the electric slide rail (7), the air compressor (9), the second electric push rod (14), the pressure sensor (16), the first solenoid valve (21), the first air pressure sensor (22), the second solenoid valve (25), and the second air pressure sensor (26).

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