Motor stator air tightness detection device

Abstract

The motor stator assembly comprises a base part and a shaft part, the shaft part is internally provided with an inner cavity, the inner cavity is provided with an opening located in the side portion of the shaft part and a port located in the end portion of the shaft part, the base part is connected with the port, and the base part is connected with the port. The sealing position between the end opening edge and the base body part is sealed through glue, and the device comprises a drying mechanism used for drying the glue on the workpiece; the leak detection mechanism comprises a positioning seat, a pushing assembly, a movement driving assembly, a leak detector and two vacuum side boxes; and the carrying mechanism is used for driving the motor stator assembly to move between the drying mechanism and the positioning seat. According to the motor stator airtightness detection device, airtightness detection can be carried out on the dried motor stator assembly, special airtightness detection can be carried out on the gluing position, the automation degree is high, shaft parts of different shapes can be adapted for sealing, and the airtightness test accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to a motor stator air tightness detection device. Background Art

[0002] An electric motor, commonly known as a motor, refers to an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. The main function of a motor is to generate driving torque as a power source for electrical appliances or various machines.

[0003] During the production process, a shaft needs to be installed on one side of the motor stator assembly. The interior of the shaft is hollow, and the shaft needs to be sealed with the structure of the base part of the motor stator assembly by gluing to prevent leakage from the inside of the shaft through the gap between the shaft and the base part. However, sometimes the sealing effect of the glue is not good, resulting in quality problems in the product. At present, there is no special device to detect the airtightness of this part. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and to provide a motor stator air tightness detection device.

[0005] One embodiment of the present invention provides a motor stator air tightness detection device, which is applied to leak detection of a motor stator assembly. The motor stator assembly includes a base portion and a shaft portion. The shaft portion is provided with an inner cavity. The inner cavity has an opening located on the side of the shaft portion and a port located at the end of the shaft portion. The base portion is connected to the port. The sealing position between the edge of the port and the base portion is sealed by glue, including:

[0006] A drying mechanism, which is used to dry the glue on the workpiece;

[0007] The leak detection mechanism comprises a positioning seat, a pushing assembly, a movable driving assembly, a leak detector and two vacuum side boxes, the positioning seat is used to position the base part, the two vacuum side boxes are arranged side by side on one side of the positioning seat, and the two vacuum side boxes are provided with a first sealing member on the side facing each other, the movable driving assembly is driven and connected to the vacuum side boxes, and the two vacuum side boxes are driven by the movable driving assembly to approach each other to a closed position and move away from each other to an open position, when the two vacuum side boxes are in the closed position, the two vacuum side boxes surround and form a vacuum cavity, the two first sealing members are used to abut the shaft part, the pushing assembly is used to push the motor stator assembly on the positioning seat so that the shaft part is located between the two vacuum side boxes, and the leak detector is connected to the vacuum cavity;

[0008] A transport mechanism is used to drive the motor stator assembly to move between the drying mechanism and the positioning seat.

[0009] In some optional embodiments, the pushing assembly includes a first ejector pin, a first translation drive assembly, a second ejector pin, and a second translation drive assembly, the first ejector pin and the second ejector pin are respectively arranged on both sides of the positioning seat, the first translation drive assembly is drivingly connected to the first ejector pin, and the second translation drive assembly is drivingly connected to the second ejector pin, the first ejector pin and the second ejector pin cooperate to clamp the motor stator assembly, wherein the first ejector pin is pressed against the shaft portion, and the second ejector pin is pressed against the base portion, and when the two vacuum side boxes are in the closed position, part of the first ejector pin is in the vacuum chamber.

[0010] In some optional embodiments, a second sealing member is provided on the vacuum side box, and when the two vacuum side boxes are in the closed position, the two second sealing members press against the first ejector pins.

[0011] In some optional embodiments, the positioning seat is provided with a positioning groove that matches the shape of the base portion.

[0012] In some optional embodiments, the drying mechanism includes a circulating conveyor line, a drying hood, and a plurality of drying fans arranged on both sides of the drying hood. The drying hood is arranged on the circulating conveyor line and forms a drying channel extending along the conveying direction of the circulating conveyor line. The conveying mechanism is used to drive the motor stator assembly to move between the circulating feeding conveyor line and the positioning seat.

[0013] In some optional embodiments, the circulating conveyor line is provided with a plurality of conveying seats arranged in sequence along the conveying direction of the circulating conveyor line, and when the base portion is placed on the conveying seat, the base portion rotates and cooperates with the conveying seat;

[0014] A guide rail spirally extending along the conveying direction of the circulating conveyor line is provided in the drying channel. A plurality of teeth are formed on the outer side of the base portion. The teeth are arranged around the base portion. The guide rail is used to engage with the teeth. When the conveying seat moves along the conveying direction of the circulating conveyor line, the guide rail drives the base portion to rotate relative to the conveying seat through the teeth.

[0015] In some optional embodiments, the first sealing member includes an elastic body, and a curved pressing portion is formed on one side of the elastic body. When the two vacuum side boxes are in the closed position, the pressing portions of the elastic bodies on the two vacuum side boxes surround and form a sealed space that seals the shaft portion.

[0016] Wherein, a plurality of rigid filling pieces are provided in the elastic body, and the rigid filling pieces are arranged in sequence along the extending direction of the pressing portion.

[0017] In some optional embodiments, the rigid filling piece is in the shape of a triangular prism, having a first corner and two second corners, the axis of the rigid filling piece extends along the axial direction of the sealed space, the first corner faces the pressing portion, and the sides of the two second corners are parallel to the tangent of the pressing portion.

[0018] In some optional embodiments, the vacuum side box is further provided with a movable groove, a pressing member and a pressing drive unit, the pressing member is movably arranged in the movable groove, a portion of the first sealing member extends into the movable groove, and the pressing drive unit is drivably connected to the pressing member for driving the pressing member to press the first sealing member toward the sealed space.

[0019] In some optional embodiments, a pressure equalizing chamber is provided in the first sealing member, the pressure equalizing chamber is filled with pressure equalizing gas or pressure equalizing liquid, the pressure equalizing chamber is located between the compression member and the rigid filling member, and the pressure equalizing chamber extends around the extension direction of the pressing portion.

[0020] Compared with the existing technology, the motor stator air tightness detection device of the present invention can perform air tightness detection on the motor stator assembly after drying, and can perform special air tightness detection on the gluing position. It has a high degree of automation and can adapt to the sealing of shafts of different shapes, thereby improving the accuracy of the air tightness test.

[0021] In order to more clearly understand the present invention, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a motor stator assembly according to an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the structure of a motor stator air tightness detection device according to one embodiment of the present invention;

[0024] Figure 3 This is a schematic structural diagram of a leak detection mechanism according to an embodiment of the present invention;

[0025] Figure 4 A schematic structural diagram of a partial structure of a leak detection mechanism according to another embodiment of the present invention;

[0026] Figure 5 This is a structural diagram of a drying mechanism according to an embodiment of the present invention;

[0027] Figure 6 A cross-sectional view of a partial structure of a leak detection mechanism according to another embodiment of the present invention;

[0028] Figure 7 This is a cross-sectional view of a first sealing member, a pressing member, and a shaft portion according to another embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 11. Base; 12. Shaft; 13. Opening; 14. Gluing position; 15. Tooth; 16. Groove structure; 20. Drying mechanism; 21. Circulating conveyor line; 22. Drying hood; 23. Drying fan; 24. Drying channel; 25. Conveying seat; 26. Guide rail; 30. Leak detection mechanism; 31. Positioning seat; 32. Pushing assembly; 321. First ejector pin; 322. First translation drive assembly; 323. Second ejector pin; 324. Second translation drive assembly; 33. Mobile drive assembly; 34. Vacuum side box; 35. First sealing member; 351. Elastic body; 352. Pressing portion; 353. Rigid filling member; 354. Pressure equalizing chamber; 36. Second sealing member; 37. Movable groove; 38. Pressing member; 39. Pressing drive unit; 40. Transport mechanism; 50. Unloading and conveying mechanism. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, unless otherwise specified, "multiple" means 2 or more, and "several" means 1 or more. In addition, unless otherwise specified, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0034] In the description of the present invention, reference to terms such as "one embodiment," "some optional embodiments," or "some optional embodiments" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0035] See also Figure 1 One embodiment of the present invention provides a motor stator air tightness detection device, which is applied to leak detection of a motor stator assembly. The motor stator assembly includes a base portion 11 and a shaft portion 12. The shaft portion 12 is provided with an inner cavity. The inner cavity has an opening 13 located on the side of the shaft portion 12 and a port located at the end of the shaft portion 12. The base portion 11 is connected to the port. The sealing position between the edge of the port and the base portion 11 is sealed by glue, including:

[0036] A drying mechanism 20, which is used to dry the glue on the workpiece;

[0037] The leak detection mechanism 30 includes a positioning seat 31, a pushing assembly 32, a moving drive assembly 33, a leak detector and two vacuum side boxes 34. The positioning seat 31 is used to position the base portion 11. The two vacuum side boxes 34 are arranged side by side on one side of the positioning seat 31. The two vacuum side boxes 34 are provided with a first sealing member 35 on the side facing each other. The moving drive assembly 33 is driven and connected to the vacuum side boxes 34. The two vacuum side boxes 34 are driven by the moving drive assembly 33 to approach each other to a closed position and move away from each other to an open position. When the two vacuum side boxes 34 are in the closed position, the two vacuum side boxes 34 surround and form a vacuum chamber. The two first sealing members 35 are used to abut the shaft portion 12. The pushing assembly 32 is used to push the motor stator assembly on the positioning seat 31 so that the shaft portion 12 is located between the two vacuum side boxes 34. The leak detector is connected to the vacuum chamber.

[0038] The transport mechanism 40 is used to drive the motor stator assembly to move between the drying mechanism 20 and the positioning seat 31.

[0039] The working principle of the motor stator air tightness detection device according to one embodiment of the present invention is described below:

[0040] The drying mechanism 20 dries the glued motor stator assembly. After the drying is completed, the transport mechanism 40 places the motor stator assembly on the positioning seat 31 for positioning. Then the pushing assembly 32 pushes the motor stator assembly to move so that the shaft 12 and the opening 13 on the shaft 12 are located between the two vacuum side boxes 34. Then, the two vacuum side boxes 34 are driven by the moving drive assembly 33 to move closer to each other until the two vacuum side boxes 34 are in the closed position. At this time, since the part of the shaft 12 with the opening 13 is in the vacuum chamber, The portion of the shaft 12 with the port is outside the vacuum chamber, and the two first seals 35 are pressed against the portion of the shaft 12 between the opening 13 and the port, thereby improving the sealing between the shaft 12 and the vacuum side box 34. The vacuum chamber is then filled with gas so that the air pressure in the vacuum chamber is at a set air pressure. The leak detector then detects the air pressure change in the vacuum chamber. If the air pressure in the vacuum chamber drops below the preset air pressure, it indicates that there is a leak at the gluing position 14. If the air pressure in the vacuum chamber is not less than the preset air pressure, it indicates that the air tightness of the gluing position 14 is qualified.

[0041] The leak detector is an instrument that can detect the air pressure. The principle and structure of the leak detector are well known to those skilled in the art and will not be described in detail here.

[0042] The conveying mechanism 40 can adopt a clamping module and a multi-axis movable module. The clamping module is used to clamp the motor stator assembly, which can adopt pneumatic clamps, etc., and the multi-axis movable module can drive the clamping module to move in multiple directions. The principles and structures of the clamping module and the multi-axis movable module are technologies well known to those skilled in the art and will not be repeated here.

[0043] The specific structure of the mobile drive assembly 33 can be designed according to actual needs. For example, the mobile drive assembly 33 can be a screw drive assembly, a rotary motor translation drive assembly, a belt translation drive assembly, a cylinder translation drive assembly or a linear motor translation drive assembly.

[0044] In some optional embodiments, the pushing assembly 32 includes a first ejector pin 321, a first translation drive assembly 322, a second ejector pin 323, and a second translation drive assembly 324. The first ejector pin 321 and the second ejector pin 323 are respectively arranged on both sides of the positioning seat 31. The first translation drive assembly 322 is drivably connected to the first ejector pin 321 for driving the first ejector pin 321 to translate. The second translation drive assembly 324 is drivably connected to the second ejector pin 323 for driving the second ejector pin 323 to translate. The first ejector pin 321 and the second ejector pin 323 cooperate to clamp the motor stator assembly, wherein the first ejector pin 321 is pressed against the shaft portion 12, and the second ejector pin 323 is pressed against the base portion 11. When the two vacuum side boxes 34 are in the closed position, part of the first ejector pin 321 is in the vacuum chamber. The first ejector pin 321 abuts against one end of the shaft portion 12 away from the base portion 11, and the second ejector pin 323 abuts against one end of the base portion 11 away from the shaft portion 12, thereby clamping the motor stator assembly. Subsequently, under the drive of the first translation drive assembly 322 and the second translation drive assembly 324, the first ejector pin 321 and the second ejector pin 323 move to clamp the motor stator assembly toward the two vacuum side boxes 34, so that part of the shaft portion 12 is located between the two vacuum side boxes 34.

[0045] The specific structures of the first translation drive assembly 322 and the second translation drive assembly 324 can be designed according to actual needs. For example, the first translation drive assembly 322 and the second translation drive assembly 324 can be screw drive assemblies, rotary motor translation drive assemblies, belt translation drive assemblies, cylinder translation drive assemblies or linear motor translation drive assemblies.

[0046] In some optional embodiments, the vacuum side boxes 34 are provided with second sealing members 36. When the two vacuum side boxes 34 are in the closed position, the two second sealing members 36 press against the first ejector pin 321. Because the first ejector pin 321 also needs to abut the shaft portion 12, a portion of the first ejector pin 321 needs to be within the vacuum chamber. The two second sealing members 36 press against the first ejector pin 321, thereby improving the sealing between the first ejector pin 321 and the vacuum side boxes 34.

[0047] In some optional embodiments, a positioning groove matching the shape of the base portion 11 is provided on the positioning seat 31 .

[0048] In some optional embodiments, the drying mechanism 20 includes a circulating conveyor line 21, a drying hood 22, and a plurality of drying fans 23 arranged on both sides of the drying hood 22. The drying hood 22 is arranged on the circulating conveyor line 21 and forms a drying channel 24 extending along the conveying direction of the circulating conveyor line 21. The conveying mechanism 40 is used to drive the motor stator assembly to move between the circulating feeding conveyor line and the positioning seat 31. The drying fan 23 is used to blow hot air toward the drying channel 24, thereby drying the motor stator assembly passing through the drying channel 24.

[0049] The circulating conveyor line 21 is used to drive the motor stator assembly to move, and it can adopt a mesh belt and chain conveying device, a roller conveying device, a chain plate conveying device, a belt conveying device, etc.

[0050] The drying fan 23 may include a fan and a heating module arranged on the fan. The heating module may be a resistance wire heating module or a PTC heating module.

[0051] In some optional embodiments, the circulating conveyor line 21 is provided with a plurality of conveying seats 25 sequentially arranged along the conveying direction of the circulating conveyor line 21 , and when the base portion 11 is placed on the conveying seats 25 , the base portion 11 rotates and cooperates with the conveying seats 25 ;

[0052] A guide rail 26 spirally extending along the conveying direction of the circulating conveyor line 21 is provided in the drying channel 24. A plurality of teeth 15 are formed on the outer side of the base 11. The teeth 15 are arranged around the base 11. The guide rail 26 is used to engage with the teeth 15. When the conveying seat 25 moves along the conveying direction of the circulating conveyor line 21, the guide rail 26 drives the base 11 to rotate relative to the conveying seat 25 through the teeth 15, thereby utilizing the power of the conveying movement of the circulating conveyor line 21 to drive the base 11 to rotate. Since the drying fans 23 are only arranged on both sides of the drying hood 22, the guide rail 26 drives the base 11 to rotate, so that the overall angle of the motor stator assembly can be adjusted, thereby improving the drying effect.

[0053] In some optional embodiments, the first sealing member 35 includes an elastic body 351, and an arc-shaped pressing portion 352 is formed on one side of the elastic body 351. When the two vacuum side boxes 34 are in the closed position, the pressing portions 352 of the elastic bodies 351 on the two vacuum side boxes 34 surround and form a sealed space for sealing the shaft portion 12; wherein, a plurality of rigid filling members 353 are provided in the elastic body 351, and the rigid filling members 353 are arranged in sequence along the extension direction of the pressing portion 352. The pressing portion 352 is pressed against the shaft 12 to improve the fit and thus the sealing. The rigid filling member 353 is intended to adapt to the shape change of the side of the shaft 12. When a groove structure 16 is required to be designed on the periphery of the shaft 12, the periphery of the shaft 12 will be concave, which causes the pressing portion 352 to need to enter the groove structure 16 to achieve sealing. When the vacuum side box 34 presses the pressing portion 352 against the shaft 12, the rigid filling member 353 can be used to strengthen the pressure on the elastic body 351 between the rigid filling member 353 and the pressing portion 352, thereby increasing the deformation of the elastic body 351 and entering the groove structure 16, which is beneficial to improving the sealing.

[0054] In some optional embodiments, the rigid filler 353 is in the shape of a triangular prism, having a first corner and two second corners. The axis of the rigid filler 353 extends axially along the sealed space, with the first corner facing the pressing portion 352, and the side surfaces of the two second corners being parallel to the tangent of the pressing portion 352. When a portion of the elastic body 351 is squeezed into the groove structure 16, the deformation of the elastic body 351 causes the first corners of the rigid filler 353 near the corners of the groove structure 16 to face the corners of the groove structure 16. The force exerted on the rigid filler 353 drives the portion of the elastic body 351 toward the corners of the groove structure 16, thereby making the pressing portion 352 fit more closely with the corners of the groove structure 16. Furthermore, due to the layout of multiple rigid fillers 353, it can accommodate groove structures 16 of different sizes.

[0055] In some optional embodiments, the vacuum side box 34 is further provided with a movable groove 37, a pressing piece 38 and a pressing drive part 39. The pressing piece 38 is movably arranged in the movable groove 37, and part of the first sealing piece 35 extends into the movable groove 37. The pressing drive part 39 is driven and connected to the pressing piece 38, and is used to drive the pressing piece 38 to press the first sealing piece 35 toward the sealed space, and the elastic body 351 is pressed toward the outside of the shaft portion 12 through the pressing piece 38, so that the pressing part 352 is more closely fitted to the shaft portion 12, which is conducive to improving the sealing performance.

[0056] In some optional embodiments, a pressure equalizing chamber 354 is provided in the first sealing member 35, and the pressure equalizing chamber 354 is filled with pressure equalizing gas or pressure equalizing liquid. The pressure equalizing chamber 354 is located between the pressing member 38 and the rigid filling member 353, and the pressure equalizing chamber 354 extends around the extension direction of the pressing portion 352. When the pressing member 38 presses the elastic body 351 toward the shaft portion 12, the pressure equalizing chamber 354 will deform, causing the pressure equalizing gas or pressure equalizing liquid inside to move adaptively, so that the pressing member 38 8 The pressure on the elastic body 351 is more uniform, and when the shaft 12 has a groove structure 16, part of the elastic body 351 will extend into the groove structure 16, which will cause the pressure equalizing chamber 354 to deform, causing the pressure equalizing chamber 354 at the corresponding position of the groove structure 16 to expand, and the pressure equalizing gas or pressure equalizing liquid will flow to the expanded position of the pressure equalizing chamber 354, thereby avoiding the elastic body 351 from deforming toward the groove structure 16 and causing it to detach from the clamping member 38, resulting in uneven force on the elastic body 351. Moreover, since the elastic body 351 is deformed by bending when the pressing member 38 applies pressure, the elastic body 351 is deformed to the greatest extent in the middle region of the groove structure 16, and the elastic body 351 deforms less as it approaches the corners of the groove structure 16. This causes the pressing portion 352 to be unable to fit the groove structure 16. The equalizing gas or liquid in the equalizing pressure chamber 354 balances the pressure, thereby avoiding this situation. Furthermore, since the bending deformation of the elastic body 351 drives the first corner of the rigid filler 353 toward the corner of the groove structure 16, and under the influence of the equalizing pressure of the equalizing pressure chamber 354, the first corner of the rigid filler 353 will also squeeze the portion of the elastic body 351 beyond the corner of the groove structure 16, thereby fitting more closely to the groove structure 16 and achieving the effect of improving the sealing performance. The equalizing pressure effect of the equalizing pressure chamber 354 allows the pressing portion 352 to equalize the pressure on groove structures 16 of different sizes.

[0057] In some optional embodiments, a material unloading and conveying mechanism 50 is further included, and the transporting mechanism 40 can transport the motor stator assembly that has completed inspection to the material unloading and conveying mechanism 50.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A motor stator air tightness detection device, used for leak detection of motor stator components, the motor stator component comprising a base and a shaft, the shaft being provided with an inner cavity, the inner cavity having an opening located at a side of the shaft and a port located at an end of the shaft, the base being connected to the port, and the sealing position between the edge of the port and the base being sealed by glue, characterized in that: include: A drying mechanism, which is used to dry the glue on the workpiece; The leak detection mechanism comprises a positioning seat, a pushing assembly, a movable driving assembly, a leak detector and two vacuum side boxes, the positioning seat is used to position the base part, the two vacuum side boxes are arranged side by side on one side of the positioning seat, and the two vacuum side boxes are provided with a first sealing member on the side facing each other, the movable driving assembly is driven and connected to the vacuum side boxes, and the two vacuum side boxes are driven by the movable driving assembly to approach each other to a closed position and move away from each other to an open position, when the two vacuum side boxes are in the closed position, the two vacuum side boxes surround and form a vacuum cavity, the two first sealing members are used to abut the shaft part, the pushing assembly is used to push the motor stator assembly on the positioning seat so that the shaft part is located between the two vacuum side boxes, and the leak detector is connected to the vacuum cavity; A transport mechanism is used to drive the motor stator assembly to move between the drying mechanism and the positioning seat.

2. The motor stator air tightness detection device according to claim 1, characterized in that: The pushing assembly includes a first ejector pin, a first translation drive assembly, a second ejector pin, and a second translation drive assembly. The first ejector pin and the second ejector pin are respectively arranged on both sides of the positioning seat. The first translation drive assembly is drivingly connected to the first ejector pin, and the second translation drive assembly is drivingly connected to the second ejector pin. The first ejector pin and the second ejector pin cooperate to clamp the motor stator assembly, wherein the first ejector pin is pressed against the shaft portion, and the second ejector pin is pressed against the base portion. When the two vacuum side boxes are in the closed position, part of the first ejector pin is in the vacuum chamber.

3. The motor stator air tightness detection device according to claim 2, characterized in that: The vacuum side box is provided with a second sealing member. When the two vacuum side boxes are in the closed position, the two second sealing members press against the first ejector pin.

4. The motor stator air tightness detection device according to claim 1, characterized in that: The positioning seat is provided with a positioning groove matching the shape of the base portion.

5. The motor stator air tightness detection device according to claim 1, characterized in that: The drying mechanism includes a circulating conveyor line, a drying hood, and a plurality of drying fans arranged on both sides of the drying hood. The drying hood is arranged on the circulating conveyor line and forms a drying channel extending along the conveying direction of the circulating conveyor line. The conveying mechanism is used to drive the motor stator assembly to move between the circulating feeding conveyor line and the positioning seat.

6. The motor stator air tightness detection device according to claim 5, characterized in that: The circulating conveyor line is provided with a plurality of conveying seats arranged in sequence along the conveying direction of the circulating conveyor line. When the base part is placed on the conveying seat, the base part rotates and cooperates with the conveying seat. A guide rail spirally extending along the conveying direction of the circulating conveyor line is provided in the drying channel. A plurality of teeth are formed on the outer side of the base portion. The teeth are arranged around the base portion. The guide rail is used to engage with the teeth. When the conveying seat moves along the conveying direction of the circulating conveyor line, the guide rail drives the base portion to rotate relative to the conveying seat through the teeth.

7. The motor stator air tightness detection device according to any one of claims 1 to 6, characterized in that: The first sealing member includes an elastic body, and an arc-shaped pressing portion is formed on one side of the elastic body. When the two vacuum side boxes are in the closed position, the pressing portions of the elastic bodies on the two vacuum side boxes surround and form a sealed space that seals the shaft portion. Wherein, a plurality of rigid filling pieces are provided in the elastic body, and the rigid filling pieces are arranged in sequence along the extending direction of the pressing portion.

8. The motor stator air tightness detection device according to claim 7, characterized in that: The rigid filling piece is in the shape of a triangular prism and has a first corner and two second corners. The axis of the rigid filling piece extends along the axial direction of the sealed space. The first corner faces the pressing portion, and the sides of the two second corners are parallel to the tangent of the pressing portion.

9. The motor stator air tightness detection device according to claim 7, characterized in that: The vacuum side box is also provided with a movable groove, a clamping piece and a clamping drive part. The clamping piece is movably arranged in the movable groove, and part of the first sealing piece extends into the movable groove. The clamping drive part is drivably connected to the clamping piece and is used to drive the clamping piece to press the first sealing piece toward the sealed space.

10. The motor stator air tightness detection device according to claim 9, characterized in that: A pressure equalizing chamber is provided in the first sealing member, the pressure equalizing chamber is filled with pressure equalizing gas or pressure equalizing liquid, the pressure equalizing chamber is located between the pressing member and the rigid filling member, and the pressure equalizing chamber extends around the extension direction of the pressing portion.

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