A motor stator potting device

Abstract

The application relates to the technical field of motor manufacturing and processing equipment, in particular to a motor stator potting device, which mainly comprises a lifting rod, a cylinder seat, a clutch connecting piece, a rotary driving mechanism and a filling and potting mechanism. When working, the lifting rod drives the cylinder seat to abut against the motor stator, then the two are disconnected through the clutch connecting piece, and the lifting rod continues to go down. The linear downward displacement is converted into the power for driving the rotation of the eccentric liquid pot and the revolution of the rotating tube through the rotary driving mechanism, and the piston in the filling and potting mechanism synchronously goes down to squeeze out the glue liquid. When resetting, the piston goes up with the lifting rod to generate negative pressure to suck back to prevent glue liquid from dripping. The application only needs a single lifting power source, and positioning, revolution glue coating and extrusion glue discharge can be realized synchronously through pure mechanical linkage, the interference of multi-motor vibration on the coating track is eliminated, glue liquid dripping pollution is effectively eliminated, and the potting quality is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of motor manufacturing and processing equipment technology, specifically to a motor stator potting device. Background Technology

[0002] In the field of motor manufacturing, to improve the insulation performance and structural strength of stator coils, it is usually necessary to perform insulation potting on the stator. The conventional operation method is to pre-place a process mandrel (such as a cylindrical plug) in the inner hole of the stator, leaving an annular injection space between it and the inner wall of the stator. Then, using automated potting equipment, insulating adhesive such as resin is evenly injected into this annular space. After the adhesive cures and is removed from the mandrel, the stator potting and molding is completed.

[0003] However, existing automated stator potting equipment for motors still has the following significant shortcomings in practical applications: Firstly, to achieve uniform coating of the adhesive within the annular cavity, existing equipment typically requires multiple independent drive sources to perform different actions. For example, while linear drive mechanisms such as cylinders are used to control the lifting and lowering of the dispensing assembly, an additional independent rotary drive source (such as a servo motor) must be added to drive the dispensing assembly in circular motion. This stacking of multiple drive sources not only results in a bulky overall equipment structure and occupies a large amount of layout space, but also places extremely high demands on the control system for coordinated operation of multiple drive sources, significantly increasing the manufacturing cost and the difficulty of subsequent program maintenance.

[0004] Secondly, the introduction of the aforementioned external independent rotary drive source (such as a rotary motor) will have a significant negative impact on high-precision potting operations. The motor will inevitably generate mechanical vibrations during start-up, shutdown, or continuous operation. These vibrations will be directly transmitted to the dispensing assembly and may even cause equipment resonance, severely disrupting the originally stable flow of the adhesive and causing deviations in the coating trajectory. This uneven coating caused by power source vibration can easily lead to air bubbles or insufficient adhesive in the stator annular cavity, seriously affecting the final potting quality and yield of the motor stator.

[0005] Third, existing equipment often lacks measures to prevent glue leakage. When a single potting operation is completed and the glue injection component rises and resets, the glue injection pipeline lacks effective negative pressure back suction and immediate physical sealing capabilities, causing residual glue to easily drip under gravity. This dripping often causes secondary pollution to the non-working surfaces of the stator that have been potted (such as the iron core end face or the housing assembly surface). The hardened glue droplets not only greatly increase the manual cleaning cost, but also easily cause dimensional interference during subsequent motor assembly. Summary of the Invention

[0006] Therefore, it is necessary to provide a motor stator potting device to address the existing technical problems.

[0007] To address the problems of existing technologies, the present invention adopts the following technical solution: a motor stator potting device for potting a motor stator with a built-in cylindrical plug, wherein the cylindrical plug and the motor stator form an annular cavity to be potted, the device comprising: Positioning seat, used to place the motor stator; The lifting rod is vertically positioned and located above the motor stator; A rotary drive mechanism includes a cylindrical base and a rotating tube. The cylindrical base is sleeved on the lifting rod, and a clutch connector is provided between them. After the cylindrical base abuts against the motor stator, the clutch connector disengages the cylindrical base from the lifting rod, allowing the lifting rod to continue sliding downward. The rotating tube is sleeved on the lifting rod and rotatably connected to the cylindrical base. A motion conversion mechanism is provided between the lifting rod and the rotating tube. This motion conversion mechanism converts the axial sliding of the lifting rod relative to the cylindrical base into power to drive the rotating tube to rotate. The filling mechanism includes a liquid hopper and a piston. The liquid hopper is vertically arranged and eccentrically connected to the rotating tube. The lower end of the liquid hopper is provided with a glue injection nozzle. The piston slides inside the liquid hopper. A transmission mechanism is provided between the piston and the lifting rod. The transmission mechanism is used to make the piston slide axially synchronously with the lifting rod and to allow the piston to revolve around the lifting rod with the liquid hopper.

[0008] Furthermore, the cylinder base, rotating tube, and lifting rod are coaxially arranged. An annular support shell is fixedly provided on the top of the cylinder base. A ball bearing is coaxially embedded in the annular support shell. The outer ring of the ball bearing is fixedly connected to the annular support shell, and an annular plate is fixedly provided on its inner ring. The rotating tube is fixedly connected to the annular plate through several connecting arms.

[0009] Furthermore, the motion conversion mechanism includes a threaded guide portion and a guide pin. The threaded guide portion is located at the lower end of the lifting rod and has a threaded groove that extends spirally along the axial direction of the lifting rod. The guide pin is fixedly connected to the rotating tube and passes horizontally through the tube wall of the rotating tube and is inserted into the threaded groove.

[0010] Furthermore, the clutch connector includes a sliding sleeve and an annular support plate. The sliding sleeve is coaxially slidably mounted on the lifting rod and is located above the annular support shell. A plurality of connecting plates are provided between the sliding sleeve and the annular support shell to fix the two together. The annular support plate is coaxially fixedly mounted on the lifting rod and is located below the sliding sleeve. The bottom of the sliding sleeve is formed with an annular base plate for overlapping the top of the annular support plate. The top of the annular support plate is formed with a plurality of vertically upward limiting pins that pass through the annular base plate.

[0011] Furthermore, the outer wall of the rotating tube is formed with a flange for fixed installation of the liquid hopper, the transmission mechanism includes a rotating ring and a drive rod, the rotating ring is coaxially rotatably sleeved on the lifting rod, and two axial limiting rings are fixedly provided on the lifting rod respectively abutting against the two ends of the rotating ring, and the drive rod fixes the rotating ring and the piston together.

[0012] Furthermore, the lower end of the liquid hopper is formed with a vertically downward DC tube, the injection nozzle is connected to the DC tube, and a flow channel shut-off valve is provided between the two. The flow channel shut-off valve includes a telescopic sleeve and a valve core. The telescopic sleeve is sleeved on the bottom end of the DC tube, and the valve core is coaxially disposed inside the telescopic sleeve. The valve core is fixedly connected to the inner wall of the telescopic sleeve through several connecting rods. An annular cone is provided on the inner wall of the bottom opening of the DC tube. The upper end of the valve core passes through the annular cone and extends into the DC tube. The top of the valve core is connected to a conical plug that can be pressed downward against the annular cone to seal the DC tube.

[0013] Furthermore, a convex ring is coaxially formed on the top of the telescopic sleeve, and a retaining ring is coaxially formed on the outer wall of the DC tube above the convex ring. The flow channel on / off valve also includes a spring, which is sleeved on the DC tube, and the two ends of the spring abut against the convex ring and the retaining ring respectively. An outer sleeve is fixedly provided on the outer wall of the DC tube and sleeved on the telescopic sleeve. A travel limiting ring is formed on the inner wall of the outer sleeve below the convex ring.

[0014] Furthermore, the bottom of the cylinder base is fixedly provided with an annular platform for overlapping the top of the motor stator, the outer wall of the telescopic sleeve is fixedly provided with a stop block, and a number of vertical top pins are inserted inside the annular platform. The upper end of each top pin is provided with a limiting platform for limiting its own downward stroke, and the lower end of each top pin is inserted through the bottom of the annular platform. An annular top plate is coaxially provided above the annular platform for abutting against the stop block, and the upper ends of the number of top pins are fixedly connected to the annular top plate.

[0015] Furthermore, the positioning base is fixedly provided with a number of positioning rods, and an annular magnetic sheet is fixedly sleeved on the upper end of each positioning rod. The outer wall of the annular support is fixedly provided with a number of positioning sleeves corresponding to the positioning rods. The bottom of each positioning sleeve is coaxially fixedly provided with an annular iron sheet for magnetically engaging with the annular magnetic sheet.

[0016] Furthermore, a replenishment pipe is fixedly provided on the outer wall of the liquid hopper, and the replenishment pipe is connected to the inner cavity of the liquid hopper.

[0017] The beneficial effects of this invention compared to the prior art are: This invention utilizes a clutch connector to allow the lifting rod to continue its independent downward movement after the cylinder seat abuts against the stator. A motion conversion mechanism directly transforms this linear displacement into rotational power to drive the eccentric liquid hopper's revolution, while a transmission mechanism forces the piston to descend synchronously for adhesive extrusion. This highly integrated design eliminates the need for a separate rotary drive motor, achieving multi-dimensional automated dispensing within a minimal footprint, significantly reducing hardware redundancy and the cost of multi-drive source collaborative control. Furthermore, it fundamentally eliminates the mechanical vibrations inevitably generated by external rotary motors during start-up, shutdown, and continuous operation, preventing resonance from interfering with the adhesive flow and coating trajectory, and significantly improving the dispensing quality and yield of the stator annular cavity. In addition, upon completion of a single dispensing cycle and the lifting rod reversing upwards to reset, the transmission mechanism forces the piston to move synchronously upwards within the liquid hopper, creating an immediate negative pressure suction effect at the dispensing nozzle. This mechanical linkage effectively prevents residual adhesive from dripping under gravity, completely avoiding secondary contamination and assembly interference of the dispensing liquid on the non-working surfaces of the dispensing stator and positioning fixtures. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a planar sectional view of the present invention; Figure 3 yes Figure 2 A magnified view of the area indicated by A1 in the diagram; Figure 4 yes Figure 2 The enlarged view of the area indicated by A2 in the diagram; Figure 5 yes Figure 2 The enlarged view of the area indicated in A3; Figure 6 yes Figure 2 The enlarged view shown in section A4; Figure 7 yes Figure 2 The enlarged view of the area indicated in A5; Figure 8 This is a three-dimensional structural cross-sectional view of the present invention; Figure 9 yes Figure 8 The enlarged view of the area indicated by A6 in the middle; Figure 10 yes Figure 8 The enlarged view of the area indicated by A7 in the diagram; Figure 11 yes Figure 8 A magnified view of the area indicated by A8 in the diagram; Figure 12 It is a three-dimensional sectional view of the rotating tube and the liquid hopper; Figure 13 yes Figure 12 The enlarged schematic diagram of the part indicated by A9 in the middle.

[0019] The following are labeled in the diagram: 1. Plug; 2. Motor stator; 3. Annular cavity; 4. Positioning seat; 5. Lifting rod; 6. Cylinder seat; 7. Rotary tube; 8. Clutch connector; 9. Liquid hopper; 10. Piston; 11. Injection nozzle; 12. Transmission mechanism; 13. Annular platform; 14. Annular support shell; 15. Ball bearing; 16. Annular plate; 17. Connecting arm; 18. Guide pin; 19. Threaded groove; 20. Sliding sleeve; 21. Annular support plate; 22. Connecting plate; 23. Annular base plate; 24. Limit pin; 25. Flange; 26. 27. Rotary ring; 28. Drive rod; 29. ​​Axial limiting ring; 30. DC pipe; 31. Flow channel on / off valve; 32. Telescopic sleeve; 33. Valve core; 34. Connecting rod; 35. Annular cone; 36. Conical plug; 37. Convex ring; 38. Retaining ring; 39. Spring; 40. Outer sleeve; 41. Stroke limiting ring; 42. Stop block; 43. Top pin; 44. Limiting platform; 45. Annular top plate; 46. Positioning rod; 47. Annular magnetic piece; 48. Positioning sleeve; 49. Annular iron piece; 50. Liquid replenishment pipe; 61. Straight groove. Detailed Implementation

[0020] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0021] In the prior art, the potting of the motor stator 2 is usually to protect the internal components such as coils. The motor stator 2 includes components such as the outer shell and the stator core. Before actual potting, a cylindrical plug 1 needs to be inserted into the center of the stator. This is mainly used to shape the inner hole of the motor stator 2. The cylindrical plug 1 is usually made of materials such as silicone or Teflon, which have good demolding and high temperature resistance properties. A ring cavity 3 to be potted is formed between the cylindrical plug 1 and the motor stator 2. This ring cavity 3 is the area that needs to be filled with insulating liquid such as resin. After potting is completed and the resin has cooled and solidified, the cylindrical plug 1 can be pulled out directly, thus obtaining a motor stator 2 with a perfectly shaped inner hole. To efficiently and with high quality complete the above-mentioned potting process for annular cavity 3, refer to Figures 1 to 13As shown, this invention provides a motor stator potting device. To support the motor stator 2, a positioning seat 4 is provided at the bottom of the entire device. This positioning seat 4 ensures the motor stator 2 is placed stably and securely, providing a stable foundation for subsequent precise potting. After the motor stator 2 is positioned, the potting operation requires the cooperation of the upper motion mechanism. Therefore, this device uses a vertically positioned lifting rod 5 located above the motor stator 2 as the main power actuator. In actual operation, a drive source, such as a cylinder or servo motor, is located above the lifting rod 5 to drive it to move vertically. To convert and distribute the single lifting power provided by this drive source, thereby achieving automated and uniform potting of the annular cavity 3 of the motor stator 2, this device further introduces a rotary drive and power clutch structure to realize the transmission and switching of lifting power.

[0022] Regarding the aforementioned rotary drive and power clutch structure, this device specifically constructs a rotary drive mechanism, such as... Figure 1 As shown, the rotary drive mechanism mainly includes a cylindrical base 6 and a rotating tube 7. The cylindrical base 6 is sleeved outside the lifting rod 5 and is mainly used to support the related rotating components and to contact and position with the motor stator 2 below. Simultaneously, to achieve switching of lifting power, a clutch connector 8 is provided between the cylindrical base 6 and the lifting rod 5. When the lifting rod 5 drives the cylindrical base 6 downward until the cylindrical base 6 abuts against the motor stator 2, the clutch connector 8 disengages the cylindrical base 6 from the lifting rod 5, causing the cylindrical base 6 to be supported by the motor stator 2 and stop descending. This allows the lifting rod 5 to continue sliding downward relative to the cylindrical base 6 under the action of the drive source. Specifically, as shown... Figure 8 and Figure 11 As shown, the clutch connector 8 includes a sliding sleeve 20 and an annular support plate 21. The sliding sleeve 20 is coaxially slidably mounted on the lifting rod 5, and the annular support plate 21 is coaxially fixed on the lifting rod 5 and located below the sliding sleeve 20. The bottom of the sliding sleeve 20 is formed with an annular base plate 23 for overlapping the top of the annular support plate 21, thereby lifting the cylinder seat 6 under normal conditions. At the same time, the top of the annular support plate 21 is formed with several vertically upward limiting pins 24 that pass through the annular base plate 23. The function of the limiting pins 24 is to restrict the sliding sleeve 20. The annular support plate 21 rotates circumferentially to ensure stability during the lifting process. The top of the cylinder seat 6 is fixedly provided with an annular support shell 14, and the sliding sleeve 20 is located above the annular support shell 14. Several connecting plates 22 are provided between the sliding sleeve 20 and the annular support shell 14 to fix the two together, so that the sliding sleeve 20 and the cylinder seat 6 are integrated. The bottom of the cylinder seat 6 is fixedly provided with an annular platform 13 for attaching to the top of the motor stator 2 when it is lowered into position. The cylinder seat 6 is limited and supported by the contact between the annular platform 13 and the motor stator 2.

[0023] To smoothly convert linear lifting motion into circular motion, this device is further designed with a motion conversion structure that transforms linear motion into rotation. Specifically, as follows: Figure 2 and Figure 8 As shown, the cylinder base 6, rotating tube 7, and lifting rod 5 are coaxially arranged. A ball bearing 15 is coaxially embedded within the annular support shell 14. The outer ring of the ball bearing 15 is fixedly connected to the annular support shell 14, and its inner ring is fixedly fitted with an annular plate 16. The rotating tube 7 is fixedly connected to the annular plate 16 via several connecting arms 17. Through the support of the ball bearing 15, the axial displacement of the rotating tube 7 relative to the cylinder base 6 is restricted, allowing it to rotate freely only around the lifting rod 5. Furthermore, a motion conversion mechanism is provided between the lifting rod 5 and the rotating tube 7. This mechanism converts the downward axial sliding of the lifting rod 5 relative to the cylinder base 6 into the power to drive the rotating tube 7 to rotate after the cylinder base 6 is blocked and stopped by the motor stator 2. Specifically, as shown... Figure 4 and Figure 12 As shown, the motion conversion mechanism includes a threaded guide portion and a guide pin 18. The threaded guide portion is located at the lower end of the lifting rod 5. The threaded guide portion has a threaded groove 19 that extends spirally along the axial direction of the lifting rod 5. In actual machining, a straight groove 50 extending vertically along the outer wall of the lifting rod 5 is also provided at the lower end of the threaded groove 19. One end of the straight groove 50 is smoothly connected to the lower end of the threaded groove 19, so that the guide pin 18 can smoothly slide from the straight groove 50 into the threaded groove 19. The threaded groove 19 and the straight groove 50 together serve as the guiding reference for the motion trajectory. The guide pin 18... 8 is fixedly connected to the rotating tube 7, and the guide pin 18 passes horizontally through the tube wall of the rotating tube 7 and is inserted into the straight groove 50 or the threaded groove 19. When the cylinder seat 6 is attached to the motor stator 2 and the lifting rod 5 continues to produce downward axial displacement relative to the rotating tube 7, the guide pin 18 will first slide vertically in the straight groove 50. At this time, the rotating tube 7 and the liquid hopper 9 will not rotate. As the lifting rod 5 descends further, the guide pin 18 smoothly slides into the spiral threaded groove 19. At this time, the threaded groove 19 will force the guide pin 18 to slide circumferentially, thereby driving the rotating tube 7 to achieve rotational movement.

[0024] To ensure the stable storage of the resin solution and its uniform coating through 7 revolutions of the rotating tube, this device further incorporates a sophisticated filling mechanism and transmission system. The filling mechanism is primarily used to contain and extrude the resin solution, such as... Figure 8 and Figure 12As shown, it includes a liquid hopper 9 and a piston 10. The liquid hopper 9 is vertically arranged and eccentrically connected to the rotating tube 7. For ease of installation, the outer wall of the rotating tube 7 is formed with a flange 25 for fixing the liquid hopper 9. A replenishment pipe 49 is fixedly provided on the outer wall of the liquid hopper 9. The replenishment pipe 49 is connected to the inner cavity of the liquid hopper 9. The function of the replenishment pipe 49 is to facilitate the replenishment of resin glue into the liquid hopper 9 by external glue supply equipment. Since the liquid hopper 9 is in a revolution state during subsequent glue filling, an appropriate amount of glue needs to be filled into the liquid hopper 9 in advance through the replenishment pipe 49 before the glue filling operation begins. The lower end of the liquid hopper 9 is provided with a glue nozzle 11 for discharging glue into the annular cavity 3. The piston 10 slides inside the liquid hopper 9. The function of the piston 10 is to apply pressure to squeeze out the glue in the liquid hopper 9 and to generate negative pressure when moving upward. In order to drive the piston 10 to operate, as shown in the figure, the piston 10 is used to apply pressure to squeeze out the glue in the liquid hopper 9 and to generate negative pressure when moving upward. Figure 1 and Figure 8 As shown, a transmission mechanism 12 is provided between the piston 10 and the lifting rod 5. The transmission mechanism 12 is used to make the piston 10 slide axially synchronously with the lifting rod 5, and to allow the piston 10 to revolve around the lifting rod 5 with the liquid hopper 9. Specifically, the transmission mechanism 12 includes a rotating ring 26 and a drive rod 27. The rotating ring 26 is coaxially rotatably sleeved on the lifting rod 5, and two axial limiting rings 28 are fixedly provided on the lifting rod 5, which respectively abut against the two ends of the rotating ring 26. The function of these two axial limiting rings 28 is to lock the axial position of the rotating ring 26 on the lifting rod 5, so that the rotating ring 26 can only move up and down with the lifting rod 5 and rotate relative to the lifting rod 5. The drive rod 27 fixes the rotating ring 26 and the piston 10 together. When the lifting rod 5 descends, the downward thrust is transmitted to the piston 10 through the axial limiting rings 28 and the rotating ring 26 via the drive rod 27, causing the piston 10 to move downward. In this linkage process, the design of the aforementioned straight groove 50 plays a key role in compensating for the empty stroke and sealing against backflow. Specifically, as shown in the figure... Figure 2 and Figure 4As shown, in the initial state, the vertical height of the piston 10 is higher than the position where the replenishing pipe 49 connects to the liquid hopper 9. To prevent the glue from flowing back into the replenishing pipe 49 due to the glue level being higher than the replenishing pipe 49, a certain safety distance is reserved between the bottom of the piston 10 and the glue surface. This distance is compensated by the length of the straight groove 50. That is, when the guide pin 18 slides in the straight groove 50, the piston 10 descends with the lifting rod 5 and passes the position of the replenishing pipe 49 until it contacts the glue, thus emptying the gap between the piston 10 and the glue surface before the liquid hopper 9 rotates. Subsequently, when the guide pin 18 slides into the thread... When the trough 19 drives the liquid hopper 9 to rotate, the piston 10 begins to substantially squeeze and discharge the adhesive. At this time, since the piston 10 has already passed the replenishment pipe 49, a completely reliable sealing area is formed for the piston 10 to slide upward in the reverse direction to achieve negative pressure suction after the subsequent filling is completed. Because the replenishment pipe 49 is always above the piston 10 when it rises in the reverse direction, the suction force of the piston 10 will not leak from the replenishment pipe 49. As a result, an effective negative pressure will only be generated at the glue nozzle 11 to prevent residual adhesive from dripping. At the same time, the rotation characteristics of the rotating ring 26 ensure that the piston 10 will not interfere when it revolves with the liquid hopper 9.

[0025] To achieve precise control of the adhesive flow path, such as Figure 2 , Figure 3 and Figure 13 As shown, the lower end of the liquid hopper 9 is formed with a vertically downward-pointing direct current pipe 29. The dispensing nozzle 11 is connected to the direct current pipe 29, and a flow channel on / off valve 30 is provided between them. The function of the flow channel on / off valve 30 is to close the flow channel of the liquid hopper 9 into the dispensing nozzle 11 under normal conditions, and to automatically open when the dispensing position is reached. The flow channel on / off valve 30 includes a telescopic sleeve 31 and a valve core 32. The telescopic sleeve 31 is sleeved on the bottom end of the direct current pipe 29 and can slide up and down relative to the direct current pipe 29. The valve core 32 is coaxially disposed inside the telescopic sleeve 31, and the valve core... 32 is fixed to the inner wall of the telescopic sleeve 31 by several connecting rods 33, so that the valve core 32 can rise and fall synchronously with the telescopic sleeve 31. The inner wall of the bottom opening of the DC pipe 29 is provided with a ring cone 34. The upper end of the valve core 32 passes through the ring cone 34 and extends into the DC pipe 29. The top of the valve core 32 is connected to a conical plug 35 that can be attached downward to the ring cone 34 and block the DC pipe 29. When the conical plug 35 is attached to the ring cone 34, the downward flow path of the adhesive can be completely cut off.

[0026] To provide the return spring force for pressing the conical plug 35 downwards, such as Figure 13As shown, a convex ring 36 is coaxially formed on the top of the telescopic sleeve 31, and a retaining ring 37 located above the convex ring 36 is coaxially formed on the outer wall of the DC pipe 29. The flow channel on / off valve 30 also includes a spring 38, which is sleeved on the DC pipe 29. The two ends of the spring 38 abut against the convex ring 36 and the retaining ring 37, respectively. The spring 38 is in a compressed state under normal conditions. Its function is to push the convex ring 36 downward, so that the telescopic sleeve 31, valve core 32 and conical plug 35 have a continuous downward trend, ensuring that the conical plug 35 fits tightly against the annular cone 34. An outer sleeve 39 is fixedly provided on the outer wall of the DC pipe 29 and sleeved on the telescopic sleeve 31. The function of the outer sleeve 39 is to provide external guidance and protection for the sliding of the telescopic sleeve 31. At the same time, a stroke limiting ring 40 located below the convex ring 36 is formed on the inner wall of the outer sleeve 39. The function of the stroke limiting ring 40 is to prevent the convex ring 36 from descending excessively and to prevent the telescopic sleeve 31 and valve core 32 from falling out of the DC pipe 29.

[0027] To automatically overcome the spring force of spring 38 and open the flow channel on / off valve 30 when the filling preparation is complete, this device further includes a push assembly with a mechanical trigger structure below the cylinder seat 6. The function of this mechanical trigger structure is to utilize the reaction force when the device descends and contacts the stator to open the flow channel. Specifically, as follows... Figure 3 , Figure 5 and Figure 9 As shown, a stop block 41 is fixedly provided on the outer wall of the telescopic sleeve 31. Several vertically oriented top pins 42 are inserted inside the annular platform 13. Each top pin 42 has a limiting plate 43 at its upper end to limit its downward stroke. The limiting plate 43 can prevent the top pin 42 from falling out of the annular platform 13. The lower end of each top pin 42 protrudes from the bottom of the annular platform 13 to make contact with the top of the motor stator 2 in advance. An annular top plate 44 is coaxially provided on the upper part of the annular platform 13 to abut against the stop block 41. The upper part of the several top pins 42... The top pin 42 is fixedly connected to the annular top plate 44. When the annular platform 13 descends with the cylinder seat 6 to above the motor stator 2, the lower end of the top pin 42 first contacts the motor stator 2. As the cylinder seat 6 continues to descend slightly until it overlaps the annular platform 13 on the motor stator 2, the top pin 42 will be pushed upward by the motor stator 2. In turn, it will push the stop block 41 upward through the annular top plate 44. The stop block 41 will drive the telescopic sleeve 31, valve core 32 and conical plug 35 to move upward against the elastic force of the spring 38, so that the conical plug 35 leaves the annular cone platform 34 and the flow channel opens automatically.

[0028] To ensure absolutely precise initial alignment between the device and the motor stator 2 during each potting operation, this device is equipped with a magnetic guide mechanism. Specifically, as follows: Figure 8 and Figure 10As shown, several positioning rods 45 are fixedly installed on the positioning base 4. Each positioning rod 45 has an annular magnetic sheet 46 fixedly fitted at its upper end. Correspondingly, several positioning sleeves 47 corresponding to the positioning rods 45 are fixedly installed on the outer wall of the annular support shell 14. When the device descends, the positioning sleeves 47 will accurately fit into the outside of the positioning rods 45, playing a role in physical guidance and alignment. The bottom of each positioning sleeve 47 is coaxially fixed with an annular iron sheet 48 for magnetic attraction with the annular magnetic sheet 46. When the positioning sleeve 47 descends to the position, the annular iron sheet 48 and the annular magnetic sheet 46 are attracted to each other, and the magnetic force ensures the shock resistance and stability of the device during the potting process.

[0029] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A motor stator potting device for potting a motor stator (2) containing a cylindrical plug (1), wherein the cylindrical plug (1) and the motor stator (2) form an annular cavity (3) to be potted, characterized in that, The device includes: Positioning seat (4) is used to place the motor stator (2); The lifting rod (5) is vertically positioned and located above the motor stator (2); A rotary drive mechanism includes a cylindrical base (6) and a rotating tube (7). The cylindrical base (6) is sleeved on the lifting rod (5), and a clutch connector (8) is provided between them. After the cylindrical base (6) abuts against the motor stator (2), the clutch connector (8) disengages the cylindrical base (6) from the lifting rod (5), allowing the lifting rod (5) to continue sliding downward. The rotating tube (7) is sleeved on the lifting rod (5) and rotatably connected to the cylindrical base (6). A motion conversion mechanism is provided between the lifting rod (5) and the rotating tube (7). The motion conversion mechanism is used to convert the axial sliding of the lifting rod (5) relative to the cylindrical base (6) into the power to drive the rotating tube (7) to rotate. The filling mechanism includes a liquid hopper (9) and a piston (10). The liquid hopper (9) is vertically arranged and eccentrically connected to the rotating tube (7). The lower end of the liquid hopper (9) is provided with a glue injection nozzle (11). The piston (10) slides inside the liquid hopper (9). A transmission mechanism (12) is provided between the piston (10) and the lifting rod (5). The transmission mechanism (12) is used to make the piston (10) slide axially synchronously with the lifting rod (5) and allow the piston (10) to revolve around the lifting rod (5) with the liquid hopper (9). The motion conversion mechanism includes a threaded guide part and a guide pin (18). The threaded guide part is located at the lower end of the lifting rod (5). The threaded guide part has a threaded groove (19) that extends spirally along the axial direction of the lifting rod (5). The guide pin (18) is fixedly connected to the rotating tube (7), and the guide pin (18) passes horizontally through the tube wall of the rotating tube (7) and is inserted into the threaded groove (19). The top of the cylinder base (6) is fixedly provided with an annular support shell (14). The clutch connector (8) includes a sliding sleeve (20) and an annular support plate (21). The sliding sleeve (20) is coaxially slidably sleeved on the lifting rod (5) and the sliding sleeve (20) is located above the annular support shell (14). There are several connecting plates (22) between the sliding sleeve (20) and the annular support shell (14) to fix the two together. The annular support plate (21) is coaxially fixed on the lifting rod (5) and the annular support plate (21) is located below the sliding sleeve (20). The bottom of the sliding sleeve (20) is formed with an annular base plate (23) for overlapping the top of the annular support plate (21). The top of the annular support plate (21) is formed with several vertically upward limiting pins (24) that pass through the annular base plate (23).

2. The motor stator potting device according to claim 1, characterized in that, The cylinder base (6), the rotating tube (7) and the lifting rod (5) are coaxially arranged. A ball bearing (15) is coaxially embedded in the annular support shell (14). The outer ring of the ball bearing (15) is fixedly connected to the annular support shell (14), and an annular plate (16) is fixedly provided on its inner ring. The rotating tube (7) is fixedly connected to the annular plate (16) through several connecting arms (17).

3. The motor stator potting device according to claim 1, characterized in that, The outer wall of the rotating tube (7) is formed with a flange (25) for fixed installation of the liquid supply tank (9). The transmission mechanism (12) includes a rotating ring (26) and a drive rod (27). The rotating ring (26) is coaxially rotated and sleeved on the lifting rod (5). Two axial limiting rings (28) are fixed on the lifting rod (5) and respectively abut against the two ends of the rotating ring (26). The drive rod (27) fixes the rotating ring (26) and the piston (10) together.

4. The motor stator potting device according to claim 1, characterized in that, The lower end of the liquid hopper (9) is formed with a vertically downward DC tube (29). The glue injection nozzle (11) is connected to the DC tube (29), and a flow channel shut-off valve (30) is provided between them. The flow channel shut-off valve (30) includes a telescopic sleeve (31) and a valve core (32). The telescopic sleeve (31) is sleeved on the bottom end of the DC tube (29). The valve core (32) is coaxially disposed inside the telescopic sleeve (31), and the valve core (32) is fixedly connected to the inner wall of the telescopic sleeve (31) through several connecting rods (33). A ring-shaped cone (34) is provided on the inner wall of the bottom opening of the DC tube (29). The upper end of the valve core (32) passes through the ring-shaped cone (34) and extends into the DC tube (29). The top of the valve core (32) is connected to a conical plug (35) that can be attached downward to the ring-shaped cone (34) and seal the DC tube (29).

5. The motor stator potting device according to claim 4, characterized in that, The top of the telescopic sleeve (31) is coaxially formed with a convex ring (36), and the outer wall of the DC tube (29) is coaxially formed with a retaining ring (37) located above the convex ring (36). The flow channel on / off valve (30) also includes a spring (38), which is sleeved on the DC tube (29), and the two ends of the spring (38) abut against the convex ring (36) and the retaining ring (37) respectively. The outer wall of the DC tube (29) is fixedly provided with an outer sleeve (39) sleeved on the telescopic sleeve (31), and the inner wall of the outer sleeve (39) is formed with a stroke limiting ring (40) located below the convex ring (36).

6. The motor stator potting device according to claim 4, characterized in that, The bottom of the cylinder base (6) is fixedly provided with an annular platform (13) for overlapping the top of the motor stator (2). The outer wall of the telescopic sleeve (31) is fixedly provided with a stop block (41). Several vertical top pins (42) are inserted inside the annular platform (13). Each top pin (42) has a limiting platform (43) at its upper end for limiting its downward stroke. The lower end of each top pin (42) is inserted through the bottom of the annular platform (13). An annular top plate (44) is coaxially provided above the annular platform (13) for abutting against the stop block (41) upward. The upper ends of several top pins (42) are fixedly connected to the annular top plate (44).

7. A motor stator potting device according to claim 2, characterized in that, The positioning base (4) is fixedly provided with a number of positioning rods (45), and an annular magnetic sheet (46) is fixedly sleeved on the upper end of each positioning rod (45). The outer wall of the annular support shell (14) is fixedly provided with a number of positioning sleeves (47) corresponding to the positioning rods (45). The bottom of each positioning sleeve (47) is coaxially fixedly provided with an annular iron sheet (48) for magnetic attraction with the annular magnetic sheet (46).

8. The motor stator potting device according to claim 1, characterized in that, The outer wall of the liquid hopper (9) is fixedly provided with a replenishment pipe (49), which is connected to the inner cavity of the liquid hopper (9).

Images