Potting process of end cover of permanent magnet brushless DC motor

Abstract

The present invention belongs to the field of motor assembly technology, and in particular, relates to a permanent magnet brushless DC motor end cap potting process, which is applied to a permanent magnet brushless DC motor end cap potting device, the permanent magnet brushless DC motor end cap potting device comprising a packaging table, a circular positioning hole is formed through the top of the packaging table, a ring-shaped protective pad is arranged on the top of the positioning hole, and the inner diameter of the protective pad is the same as the inner diameter of the positioning hole, a motor component to be packaged is arranged on the top of the protective pad, a heating component is inserted in the positioning hole, and a storage tank is arranged on the top of the motor component. The present invention enables the glue flowing into the gap of the enameled wire to always maintain good fluidity, and then cooperates with the vibration effect of the vibrator, can effectively accelerate the removal of air mixed into the glue from the inside of the glue, and improve the potting quality.

Description

Technical Field

[0001] The invention belongs to the technical field of motor assembly, and in particular relates to a permanent magnet brushless DC motor end cover potting process. Background Art

[0002] Permanent magnet brushless motor is a permanent magnet motor that is controlled by electronic circuit commutation or current. In the production process of permanent magnet brushless motor, the stator part of the permanent magnet brushless motor needs to be potted. Motor potting refers to the process of mechanically or manually pouring liquid colloid (mainly epoxy resin compound) into the stator gap of the motor. Its function is to: strengthen the integrity of the motor and improve the resistance to external impact and vibration; improve the insulation between the internal components and circuits of the motor, avoid direct exposure of components and circuits, improve the waterproof and moisture-proof performance of the device, and improve the heat dissipation capacity, prevent moisture, dust, corrosive gases, etc. from entering the motor to affect the motor, and extend the service life of the motor.

[0003] When the existing motor is performing the potting operation on the enameled wire part of the stator, the gap between the enameled wire is small, so it is not easy for the glue to flow into the gap between the enameled wire. In addition, when the glue is poured into the gap between the stator, when the external temperature is low, when the glue contacts the enameled wire and the iron core, the fluidity of the glue will decrease. Moreover, since there are many gaps and a complex structure of the enameled wire, the glue with low fluidity is more likely to mix with bubbles during potting, thereby affecting the protective effect of the glue on the stator.

[0004] Therefore, it is necessary to invent a permanent magnet brushless DC motor end cover encapsulation process to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides a permanent magnet brushless DC motor end cover potting process to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A permanent magnet brushless DC motor end cover potting process is applied to a permanent magnet brushless DC motor end cover potting device, the permanent magnet brushless DC motor end cover potting device comprises a packaging platform, a circular positioning hole is opened through the top of the packaging platform, a ring-shaped protective pad is arranged on the top of the positioning hole, and the inner diameter of the protective pad is the same as the inner diameter of the positioning hole, a motor component to be packaged is arranged on the top of the protective pad, a heating component is inserted in the positioning hole, a storage tank is arranged on the top of the motor component, the top of the storage tank is open, and the center of the bottom of the storage tank protrudes upward to form a groove, a plurality of rubber outlet pipes are vertically connected to the bottom edge of the storage tank, a control component is arranged between the bottom ends of the plurality of rubber outlet pipes, a protective sleeve is rotatably connected to the top inner wall of the groove, and the bottom end of the protective sleeve is inserted in the motor component The center of the inner wall at the top of the groove is vertically fixedly connected with a retractable connecting shaft, the bottom end of the connecting shaft is fixedly connected with a square connecting block, and a swivel is rotatably sleeved at a position near the bottom end of the periphery of the storage tank, and fixed plates are horizontally fixedly connected to the two sides of the swivel, and a U-shaped plate is fixedly connected between the top surfaces of the two fixed plates, and a U-shaped frame is provided on the top of the U-shaped plate, and the two bottom ends of the U-shaped frame are fixedly connected to the top of the packaging table, and the two sides of the two fixed plates separated are slidably installed on the inner walls of the two sides of the U-shaped frame respectively, and a pull rod is vertically inserted through the top of the U-shaped frame, and the bottom end of the pull rod is rotatably connected to the top of the U-shaped plate, and the surface of the pull rod near the bottom end is provided with a thread, and the thread can be screwed together with the U-shaped frame, a vibrator is installed on the bottom surface of the packaging table, and the bottom of the packaging table is connected with a base;

[0008] The specific potting process of the motor component end cover comprises the following steps:

[0009] Step 1: Place the motor component to be packaged on top of the positioning hole;

[0010] Step 2: Insert the protective cover at the bottom of the storage tank to the top of the motor component, then start the heating component to preheat the motor component, and inject glue into the storage tank after the motor component is preheated;

[0011] Step 3: Open the control assembly and vibrator so that the glue in the storage tank can be evenly poured into the motor components;

[0012] Step 4: After the glue is poured, turn off the vibrator and control assembly, and then move the storage tank and protective cover upwards;

[0013] Step 5: Before the glue solidifies, install the rotor and end cover of the motor component into the motor component in sequence, and make the glue that has not completely solidified bond with the end cover of the motor component;

[0014] Step 6: Wait for the glue to solidify, remove the packaged motor parts from the packaging table and clean off the protective pad.

[0015] Furthermore, the motor component includes a shell, a cylindrical iron core is installed inside the shell, and multiple groups of vertical enameled wires are evenly wound around the periphery of the iron core.

[0016] Furthermore, the heating component includes a sealing cylinder, which is slidably inserted in the positioning hole, the outer diameter of the sealing cylinder is the same as the outer diameter of the protective sleeve, and the wall thickness of the sealing cylinder and the protective sleeve is between the inner diameter of the iron core and the area where the enameled wire is located, the bottom of the sealing cylinder is designed to be open, and a plurality of air inlet holes are evenly penetrated in the area opposite to the inner side of the iron core at the top of the sealing cylinder, two telescopic rods are vertically fixedly connected between the bottom edge of the sealing cylinder and the base, a compression spring is sleeved on the telescopic rod, and the two ends of the compression spring are respectively fixedly connected to the base and the sealing cylinder, a heating rod is rotatably inserted through the top of the sealing cylinder, a connecting hole matching the connecting block is opened on the top of the heating rod, and the connecting block is slidably inserted in the connecting hole, a driving shaft is vertically connected to the center of the bottom end of the heating rod, a driving motor is connected to the bottom end of the driving shaft, and the driving motor is fixedly connected to the inner wall of the sealing cylinder.

[0017] Furthermore, the control component includes a sealing ring, which is sleeved on the periphery of the protective sleeve, and the top surface of the sealing ring is flush with the bottom end of the rubber outlet pipe, and through holes are opened at the top of the sealing ring relative to the multiple rubber outlet pipes, and the top of the sealing ring is fixedly connected with multiple arc-shaped slide grooves, and the center of the slide groove coincides with the center of the sealing ring and the protective sleeve, a slider is slidably installed in the slide groove, and the maximum displacement of the slider along the slide groove is greater than the diameter of the through hole, and the top of the slider is vertically fixedly connected with a connecting rod, and the top of the connecting rod is vertically fixedly connected to the bottom of the storage tank.

[0018] Furthermore, a plurality of fan blades are evenly mounted on the surface of the driving shaft, and when the driving shaft rotates, the fan blades can generate upward wind.

[0019] Furthermore, a plurality of rocker arms are hingedly connected to the periphery of the heating rod, and a knocking ball is rotatably connected to the bottom end of the rocker arm. The surface of the knocking ball is irregularly distributed with bumps of different sizes, and the knocking ball can contact the inner wall of the iron core.

[0020] Furthermore, a circular baffle is slidably sleeved on the connecting shaft, and a top rod is vertically fixedly connected to the bottom surface of the baffle, and the top rod can contact the top of the heating rod. A baffle ring is provided at the bottom of the baffle, and the baffle ring is fixedly connected to the inner wall of the protective sleeve, and the bottom surface of the baffle ring is flush with the bottom surface of the protective sleeve. The inner diameter of the baffle ring is smaller than the outer diameter of the baffle, and when the protective sleeve contacts the top of the iron core, the baffle can be separated from the baffle ring under the support of the top rod.

[0021] Furthermore, a plurality of air inlet pipes are fixedly connected to the inner wall of the bottom of the storage tank, the top ends of the air inlet pipes are of a sealed design, and the bottom ends of the air inlet pipes are connected to the bottom of the storage tank.

[0022] Furthermore, two positioning rods are vertically slidably inserted into the bottom edge of the protective sleeve, and the positioning rods are vertically fixedly connected to the bottom of the packaging platform.

[0023] Technical effects and advantages of the present invention:

[0024] 1. Before potting, the heating rod can preheat the motor components, and during the potting process, the heating rod can always heat the motor components and the poured glue, so that the glue flowing into the gap of the enameled wire can always maintain good fluidity, and then cooperate with the vibration effect of the vibrator, it can effectively accelerate the air mixed in the glue to be removed from the glue, thereby improving the potting quality;

[0025] 2. After potting is completed, as the storage tank and the protective cover are separated from the top of the motor component, the top of the motor component is in an open state. At this time, the heating rod is turned off, and then the drive motor is started to drive the drive shaft to rotate rapidly. At this time, the wind generated by the fan blades can be blown into the motor component through the air inlet hole, thereby dissipating the heat inside the motor and improving the cooling efficiency of the glue;

[0026] 3. During the rotation of the heating rod, the striking ball can roll against the inner wall of the iron core and generate vibration, thereby vibrating the bubbles in the glue from the inside of the iron core, and then cooperating with the vibration effect of the vibrator to improve the discharge efficiency of the bubbles in the glue, thereby ensuring the protective effect of the motor components after the glue solidifies;

[0027] 4. When the heat generated by the heating rod enters the groove at the bottom of the storage tank, the heat can enter the air intake pipe, thereby increasing the contact area between the heat and the glue through the air intake pipe, and then better heating and insulating the glue in the storage tank during the glue filling process, ensuring good fluidity of the glue, thereby reducing the amount of air entering the glue and improving the protective effect of the motor components after the glue solidifies. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the bottom three-dimensional structure of the packaging platform in the present invention;

[0030] Figure 3 It is a three-dimensional schematic diagram of the motor component, the heating rod and the protective pad in the present invention;

[0031] Figure 4 It is a three-dimensional cross-sectional view of the motor components, heating components, storage tanks and other structures in the present invention;

[0032] Figure 5 The present invention Figure 4 A magnified view of part A;

[0033] Figure 6 It is a three-dimensional schematic diagram of the storage tank, the rotating ring, the fixing plate and the control assembly in the present invention;

[0034] Figure 7 The present invention Figure 6 A magnified view of part B;

[0035] Figure 8 It is a three-dimensional schematic diagram of the swing rod, the knocking ball, the heating rod and the sealing cylinder in the present invention;

[0036] Fig. 9 It is a three-dimensional schematic diagram of the swing rod, the striking ball and part of the heating component in the present invention.

[0037] In the figure: 1. packaging table; 2. protective pad; 3. motor components; 31. shell; 32. iron core; 33. enameled wire; 4. heating component; 41. sealing tube; 42. telescopic rod; 43. compression spring; 44. heating rod; 45. connecting hole; 46. driving shaft; 47. driving motor; 5. storage tank; 6. rubber hose; 7. control component; 71. sealing ring; 72. slide groove; 73. slider; 74. connecting rod; 8. protective sleeve; 9. connecting shaft; 10. connecting block; 11. swivel; 12. fixing plate; 13. U-shaped plate; 14. U-shaped frame; 15. pull rod; 16. vibrator; 17. base; 18. fan blades; 19. rocker arm; 20. knocking ball; 21. baffle; 22. top rod; 23. baffle ring; 24. intake pipe; 25. positioning rod. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0039] The present invention provides Figures 1 to 9The permanent magnet brushless DC motor end cover potting process shown is applied to the permanent magnet brushless DC motor end cover potting device, which includes a packaging platform 1, a circular positioning hole is opened through the top of the packaging platform 1, and a ring-shaped protective pad 2 is arranged on the top of the positioning hole. The protective pad 2 is a disposable protective paper of specified specifications, and the inner diameter of the protective pad 2 is the same as the inner diameter of the positioning hole. A motor component 3 to be packaged is arranged on the top of the protective pad 2. The motor component 3 includes a shell 31, and a cylindrical iron core 32 is installed inside the shell 31. The periphery of the iron core 32 is evenly wound with multiple groups of vertical enameled wires 33. A heating component 4 is inserted in the positioning hole. A storage tank 5 is arranged on the top of the motor component 3. The top of the storage tank 5 is an open design, and the bottom center of the storage tank 5 bulges upward to form a groove. A plurality of glue outlet pipes 6 are vertically connected to the bottom edge of the storage tank 5, and a control component 7 is arranged between the bottom ends of the plurality of glue outlet pipes 6. The control component 7 rotates on the inner wall of the top of the groove. A protective sleeve 8 is connected, and the bottom end of the protective sleeve 8 is inserted in the motor component 3. A retractable connecting shaft 9 is vertically fixedly connected to the center of the inner wall at the top of the groove, and a square connecting block 10 is fixedly connected to the bottom end of the connecting shaft 9. A swivel 11 is rotatably sleeved on the outer periphery of the storage tank 5 near the bottom end, and fixed plates 12 are horizontally fixedly connected to the two sides of the swivel 11. A U-shaped plate 13 is fixedly connected between the top surfaces of the two fixed plates 12, and a U-shaped frame 14 is arranged on the top of the U-shaped plate 13. Both ends of the bottom of the U-shaped frame 14 are fixedly connected to the top of the packaging table 1, and the two sides of the two fixed plates 12 are slidably installed on the inner walls of the two sides of the U-shaped frame 14 respectively. A pull rod 15 is vertically inserted through the top of the U-shaped frame 14, and the bottom end of the pull rod 15 is rotatably connected to the top of the U-shaped plate 13. The surface of the pull rod 15 near the bottom end is provided with a thread, and the thread can be screwed together with the U-shaped frame 14. A vibrator 16 is installed on the bottom surface of the packaging table 1, and a base 17 is connected to the bottom of the packaging table 1.

[0040] The specific potting process of the end cover of the motor component 3 includes the following steps:

[0041] Step 1: Place the motor component 3 to be packaged on the top of the positioning hole;

[0042] Step 2: Insert the protective cover 8 at the bottom of the storage tank 5 into the top of the motor component 3, then start the heating component 4 to preheat the motor component 3, and inject glue into the storage tank 5 after the motor component 3 is preheated.

[0043] Step 3: Open the control assembly 7 and the vibrator 16 so that the glue in the storage tank 5 can be evenly poured into the motor component 3;

[0044] Step 4: After the glue is poured, turn off the vibrator 16 and the control assembly 7, and then move the storage tank 5 and the protective cover 8 upwards;

[0045] Step 5: Before the glue solidifies, install the rotor and the end cover of the motor component 3 into the motor component 3 in sequence, and make the glue that has not completely solidified bond with the end cover of the motor component 3;

[0046] Step 6: Wait for the glue to solidify, remove the packaged motor component 3 from the packaging table 1 and clean off the protective pad 2.

[0047] In the initial state, the threaded portion at the bottom end of the pull rod 15 can be screwed together with the U-shaped frame 14, so that the storage tank 5 and the protective sleeve 8 can remain suspended under the restriction of the pull rod 15. Before the motor component 3 is potted, the motor component 3 is placed from top to bottom on the top of the heating component 4 in the positioning hole. When the motor component 3 is placed, the bottom end of the outer shell 31 of the motor component 3 can keep in contact with the protective pad 2, and the bottom of the iron core 32 inside the motor component 3 can be sealed by the heating component 4, so that the area where the enameled wire 33 inside the motor component 3 is located is isolated separately. After the motor component 3 is placed on the wall, the pull rod 15 is twisted to release the lock between it and the U-shaped frame 14, and then the storage tank 5 and the protective sleeve 8 can move downward under the action of gravity. When the protective sleeve 8 is inserted into the inner part of the outer shell 31, the bottom edge of the protective sleeve 8 can be pressed on the top of the iron core 32, so that the area where the enameled wire 33 is located can be isolated separately from the outside of the protective sleeve 8.

[0048] Then, the heating component 4 is started to preheat the motor component 3, so as to ensure that during the subsequent potting operation, when the glue contacts the iron core 32 and the enameled wire 33 in the motor component 3, the glue can still maintain good fluidity. After the motor component 3 is preheated, glue is added to the storage tank 5. After the glue is added, the control component 7 and the vibrator 16 are turned on while the heating component 4 is still working, so that the glue in the storage tank 5 can be evenly poured into the gap in the area where the enameled wire 33 is located. During the potting process, since the heating component 4 is always heated, it can be ensured that the glue flowing into the gap of the enameled wire 33 during the entire potting process can always maintain good fluidity, and then cooperate with the vibration effect of the vibrator 16, it can effectively accelerate the removal of air mixed in the glue from the inside of the glue, thereby improving the potting quality.

[0049] When the potting is completed, turn off the vibrator 16, the control component 7 and the heating component 4 to allow the glue to cool initially. Before the glue is completely solidified, pull the pull rod 15 to move the protective sleeve 8 and the storage tank 5 upward and completely separate them from the motor component 3. Then, install the rotor and the end cover of the motor component 3 into the motor component 3 in turn, and make the glue that is not completely solidified adhere to the end cover of the motor component 3. After the glue is completely solidified, remove the motor component 3 from the top of the heating component 4, and then tear off the protective pad 2 that is glued to the bottom of the motor component 3 and clean it.

[0050] like Figures 3 to 9 As shown, the heating component 4 includes a sealing cylinder 41, which is slidably inserted in the positioning hole. The outer diameter of the sealing cylinder 41 is the same as the outer diameter of the protective sleeve 8, and the wall thickness of the sealing cylinder 41 and the protective sleeve 8 is between the inner diameter of the iron core 32 and the area where the enameled wire 33 is located. The bottom of the sealing cylinder 41 is designed to be open, and a plurality of air inlet holes are evenly penetrated in the area opposite to the inner side of the iron core 32 at the top of the sealing cylinder 41. Two telescopic rods 42 are vertically fixedly connected between the bottom edge of the sealing cylinder 41 and the base 17. The telescopic rods A compression spring 43 is sleeved on 42, and the two ends of the compression spring 43 are fixedly connected to the base 17 and the sealing cylinder 41 respectively. A heating rod 44 is rotatably inserted through the top of the sealing cylinder 41. A connecting hole 45 matching the connecting block 10 is opened on the top of the heating rod 44, and the connecting block 10 is slidably inserted in the connecting hole 45. A driving shaft 46 is vertically connected to the center of the bottom end of the heating rod 44, and a driving motor 47 is connected to the bottom end of the driving shaft 46. The driving motor 47 is fixedly connected to the inner wall of the sealing cylinder 41;

[0051] When the motor component 3 is placed from top to bottom at the top of the positioning hole, as the motor component 3 moves downward, when the iron core 32 of the motor component 3 contacts the top of the sealing cylinder 41, the sealing cylinder 41 can move downward under the pressure of the iron core 32, and in this process, the telescopic rod 42 and the compression spring 43 can be gradually compressed, and as the telescopic rod 42 and the compression spring 43 are compressed, the reaction force of the compression spring 43 on the sealing cylinder 41 can keep the sealing cylinder 41 and the bottom of the iron core 32 pressed tightly, and when the motor component 3 is placed After the placement is completed, the bottom edge of the shell 31 of the motor component 3 can be kept in close contact with the protective pad 2, so that the sealing tube 41 cooperates with the sealing effect of the bottom edge of the iron core 32 to make the enameled wire 33 area outside the iron core 32 be isolated separately. At the same time, the heating rod 44 can be plugged into the inner side of the iron core 32, so that before the motor component 3 is potted, the motor component 3 can be preheated as a whole, thereby ensuring that when the glue contacts the iron core 32 and the enameled wire 33 inside the motor component 3, the glue can still maintain good fluidity;

[0052] During potting, as the protective sleeve 8 is pressed against the top of the iron core 32, the connecting block 10 at the bottom of the connecting shaft 9 can be inserted into the connecting hole 45 at the top of the heating rod 44. Therefore, during the potting operation, when the driving motor 47 drives the heating rod 44 to rotate, the heating rod 44 can drive the storage tank 5 to rotate through the connecting shaft 9, thereby driving the multiple glue outlet pipes 6 at the bottom of the storage tank 5 to rotate evenly along the area where the enameled wire 33 is located to perform potting operations, thereby improving the uniformity of glue potting.

[0053] like Figure 6 and Figure 7As shown, the control assembly 7 includes a sealing ring 71, which is sleeved on the periphery of the protective sleeve 8, and the top surface of the sealing ring 71 is flush with the bottom end of the rubber outlet pipe 6, and through holes are penetrated at the positions opposite to the multiple rubber outlet pipes 6 on the top of the sealing ring 71, and multiple arc-shaped slide grooves 72 are fixedly connected to the top of the sealing ring 71, and the center of the slide groove 72 coincides with the center of the sealing ring 71 and the protective sleeve 8, and a slider 73 is slidably installed in the slide groove 72, and the maximum displacement of the slider 73 moving along the slide groove 72 is greater than the diameter of the through hole, and the top of the slider 73 is vertically fixedly connected to a connecting rod 74, and the top of the connecting rod 74 is vertically fixedly connected to the bottom of the storage tank 5;

[0054] When it is necessary to stop the potting operation, the sealing ring 71 is rotated to make the through hole gradually move away from the bottom end of the glue outlet pipe 6. During this process, the connecting rod 74 can drive the slider 73 to move relative to the slide groove 72. When the through hole is completely offset from the bottom end of the glue outlet pipe 6, the sealing ring 71 can block the bottom end of the glue outlet pipe 6, thereby realizing the potting stop operation. When the potting operation is required, the sealing ring 71 is rotated in the opposite direction so that the multiple through holes on the sealing ring 71 are aligned with the bottom ends of the multiple glue outlet pipes 6 one by one.

[0055] like Figure 2 , Figure 4 and Fig. 9 As shown, a plurality of blades 18 are evenly mounted on the surface of the drive shaft 46, and when the drive shaft 46 rotates, the blades 18 can generate upward wind;

[0056] By providing the fan blades 18, the drive shaft 46 can rotate slowly during the potting process. Thus, the fan blades 18 will not generate strong wind, and thus will not affect the heating effect of the heating rod 44. After the potting is completed, as the storage tank 5 and the protective cover 8 are separated from the top of the motor component 3, the top of the motor component 3 is in an open state. At this time, the heating rod 44 is turned off, and then the drive motor 47 is started to drive the drive shaft 46 to rotate quickly. At this time, the wind generated by the fan blades 18 can be blown into the motor component 3 through the air inlet, thereby dissipating the heat inside the motor, thereby improving the cooling efficiency of the glue.

[0057] like Figure 4 and Figure 8 As shown, the periphery of the heating rod 44 is hinged with a plurality of swing rods 19, the bottom end of the swing rod 19 is rotatably connected with a knocking ball 20, the surface of the knocking ball 20 is irregularly distributed with bumps of different sizes, and the knocking ball 20 can contact the inner wall of the iron core 32;

[0058] During the rotation of the heating rod 44, the knocking ball 20 can pull the bottom end of the rocker arm 19 to deflect toward the inner wall of the iron core 32 under the action of centrifugal force. When the knocking ball 20 contacts the inner wall of the iron core 32, as the heating rod 44 rotates, the knocking ball 20 can roll along the inner wall of the iron core 32. During the rolling of the knocking ball 20, since the surface of the knocking ball 20 is irregularly distributed with bumps of different sizes, the knocking ball 20 can generate vibration during the rolling of the knocking ball 20, thereby vibrating the bubbles in the glue from the inside of the iron core 32, and then cooperating with the vibration effect of the vibrator 16 to improve the discharge efficiency of the bubbles in the glue, thereby ensuring the protective effect of the motor component 3 after the glue solidifies.

[0059] like Figure 4 and Figure 5 As shown, a circular baffle 21 is slidably sleeved on the connecting shaft 9, and a push rod 22 is vertically fixedly connected to the bottom surface of the baffle 21, and the push rod 22 can contact the top of the heating rod 44. A baffle ring 23 is arranged at the bottom of the baffle 21, and the baffle ring 23 is fixedly connected to the inner wall of the protective sleeve 8, and the bottom surface of the baffle ring 23 is flush with the bottom surface of the protective sleeve 8. The inner diameter of the baffle ring 23 is smaller than the outer diameter of the baffle 21, and when the protective sleeve 8 contacts the top of the iron core 32, the baffle 21 can be separated from the baffle ring 23 under the support of the push rod 22;

[0060] When the protective sleeve 8 is placed on the top of the iron core 32 inside the shell 31, the baffle 21 can be separated from the baffle ring 23 under the support force of the top rod 22. At this time, the heat generated by the heating rod 44 can enter the protective sleeve 8 through the gap between the baffle 21 and the baffle ring 23 and gather at the groove at the bottom of the storage tank 5, so that the heating rod 44 can heat the motor component 3 while also heating and keeping the glue in the storage tank 5 warm to ensure the fluidity of the glue.

[0061] When the glue is filled, as the pull rod 15 is pulled upward, the storage tank 5 and the protective cover 8 can be moved away from the top of the motor component 3. At this time, the top rod 22 loses its support, so the baffle 21 can contact with the baffle ring 23 under the action of gravity, thereby closing the bottom of the protective cover 8. At this time, the heating rod 44 is turned off, and as the drive motor 47 is started, the wind generated by the fan blades 18 can continuously blow out from the top of the motor component 3, thereby taking out the heat in the motor component 3, and then accelerating the cooling and curing of the glue. Due to the blocking effect of the baffle 21 and the baffle ring 23, the wind cannot enter the protective cover 8, thereby avoiding the wind from cooling the bottom of the storage tank 5, and when the wind blows on the baffle 21 and the baffle ring 23, the wind can blow on the top of the motor component 3 in a horizontal direction under the blocking of the baffle 21 and the baffle ring 23, so that the top of the motor component 3 can also be quickly cooled.

[0062] like Figures 4 to 6 As shown, a plurality of air inlet pipes 24 are fixedly connected to the inner wall of the bottom of the storage tank 5, the top of the air inlet pipe 24 is of a sealed design, and the bottom of the air inlet pipe 24 is connected to the bottom of the storage tank 5;

[0063] By providing an air intake pipe 24, when the heat generated by the heating rod 44 enters the groove at the bottom of the storage tank 5, the heat can enter the air intake pipe 24, thereby increasing the contact area between the heat and the glue through the air intake pipe 24, and thus better heating and insulating the glue in the storage tank 5 during the glue filling process, ensuring good fluidity of the glue, thereby reducing the amount of air entering the glue, and improving the protective effect of the motor component 3 after the glue solidifies.

[0064] like Figure 2 As shown, the bottom edge of the protective cover 8 is vertically slidably plugged with two positioning rods 25, and the positioning rods 25 are vertically fixedly connected to the bottom of the packaging platform 1;

[0065] By providing a positioning rod 25, during the up and down movement of the protective sleeve 8, the positioning rod 25 can cooperate with the telescopic rod 42 to limit the up and down movement of the protective sleeve 8, so that the protective sleeve 8 can maintain a vertical movement state, thereby avoiding the gap between the top of the device and the bottom surface of the iron core 32 due to the overall deflection of the protective sleeve 8, thereby improving the sealing effect of the protective sleeve 8 on the bottom of the iron core 32.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A permanent magnet brushless DC motor end cover potting process, characterized in that: The invention is applied to a permanent magnet brushless DC motor end cover potting device, the permanent magnet brushless DC motor end cover potting device comprises a potting platform (1), a circular positioning hole is formed through the top of the potting platform (1), a ring-shaped protective pad (2) is arranged on the top of the positioning hole, and the inner diameter of the protective pad (2) is the same as the inner diameter of the positioning hole, a motor component (3) to be packaged is arranged on the top of the protective pad (2), a heating component (4) is inserted in the positioning hole, a storage tank (5) is arranged on the top of the motor component (3), the top of the storage tank (5) is designed to be open, and the center of the bottom of the storage tank (5) is upwardly protruding to form a groove, a plurality of glue outlet pipes (6) are vertically connected to the bottom edge of the storage tank (5), a control component (7) is arranged between the bottom ends of the plurality of glue outlet pipes (6), a protective sleeve (8) is rotatably connected to the inner wall of the top of the groove, the bottom end of the protective sleeve (8) is inserted in the motor component (3), and a retractable connecting shaft (9) is vertically fixedly connected to the center of the inner wall of the top of the groove. ), the bottom end of the connecting shaft (9) is fixedly connected to a square connecting block (10), a rotating ring (11) is rotatably sleeved at a position near the bottom end of the outer periphery of the storage tank (5), fixed plates (12) are horizontally fixedly connected to the two sides of the rotating ring (11), a U-shaped plate (13) is fixedly connected between the top surfaces of the two fixed plates (12), a U-shaped frame (14) is provided on the top of the U-shaped plate (13), the bottom ends of the U-shaped frame (14) are fixedly connected to the top of the packaging platform (1), and the two The separated sides of the fixing plate (12) are respectively slidably mounted on the inner walls of the two sides of the U-shaped frame (14); a pull rod (15) is vertically inserted through the top of the U-shaped frame (14); the bottom end of the pull rod (15) is rotatably connected to the top of the U-shaped plate (13); a thread is provided on the surface of the pull rod (15) near the bottom end, and the thread can be screwed together with the U-shaped frame (14); a vibrator (16) is installed on the bottom surface of the packaging platform (1); and the bottom of the packaging platform (1) is connected to a base (17); The specific potting process of the end cover of the motor component (3) comprises the following steps: Step 1: Place the motor component (3) to be packaged on the top of the positioning hole; Step 2: Insert the protective cover (8) at the bottom of the storage tank (5) into the top of the motor component (3), then start the heating component (4) to preheat the motor component (3), and inject glue into the storage tank (5) after the motor component (3) is preheated. Step 3: Open the control assembly (7) and the vibrator (16), so that the glue in the storage tank (5) can be evenly poured into the motor component (3); Step 4: After the glue is poured, turn off the vibrator (16) and the control assembly (7), and then move the storage tank (5) and the protective cover (8) upwards; Step 5: before the glue solidifies, install the rotor and the end cover of the motor component (3) into the motor component (3) in sequence, and allow the glue that has not completely solidified to adhere to the end cover of the motor component (3); Step 6: Wait for the glue to solidify, remove the packaged motor component (3) from the packaging table (1) and clean off the protective pad (2).

2. The permanent magnet brushless DC motor end cover potting process according to claim 1, characterized in that: The motor component (3) comprises a housing (31), a cylindrical iron core (32) is installed inside the housing (31), and a plurality of groups of vertical enameled wires (33) are evenly wound around the periphery of the iron core (32).

3. The permanent magnet brushless DC motor end cover potting process according to claim 2, characterized in that: The heating component (4) comprises a sealing cylinder (41), the sealing cylinder (41) being slidably inserted into the positioning hole, the outer diameter of the sealing cylinder (41) being the same as the outer diameter of the protective sleeve (8), and the wall thickness of the sealing cylinder (41) and the protective sleeve (8) being between the inner diameter of the iron core (32) and the region where the enameled wire (33) is located, the bottom of the sealing cylinder (41) being designed to be open, a plurality of air inlet holes being evenly penetrated through the region of the top of the sealing cylinder (41) opposite to the inner side of the iron core (32), two telescopic rods (42) being vertically fixedly connected between the bottom edge of the sealing cylinder (41) and the base (17), the telescopic rods (42) ) is sleeved with a compression spring (43), the two ends of the compression spring (43) are fixedly connected to the base (17) and the sealing cylinder (41) respectively, the top end of the sealing cylinder (41) is rotatably penetrated and plugged with a heating rod (44), the top of the heating rod (44) is provided with a connecting hole (45) matching the connecting block (10), and the connecting block (10) is slidably plugged into the connecting hole (45), the bottom end of the heating rod (44) is vertically connected with a driving shaft (46), the bottom end of the driving shaft (46) is connected to a driving motor (47), and the driving motor (47) is fixedly connected to the inner wall of the sealing cylinder (41).

4. The permanent magnet brushless DC motor end cover potting process according to claim 1, characterized in that: The control assembly (7) comprises a sealing ring (71), the sealing ring (71) being sleeved on the periphery of the protective sleeve (8), and the top surface of the sealing ring (71) being flush with the bottom end of the rubber outlet pipe (6), and through holes being penetrated at the positions of the top of the sealing ring (71) and the plurality of rubber outlet pipes (6), the top of the sealing ring (71) being fixedly connected with a plurality of arc-shaped slide grooves (72), and the center of the slide groove (72) being coincident with the center of the sealing ring (71) and the protective sleeve (8), a slider (73) being slidably mounted in the slide groove (72), and the maximum displacement of the slider (73) moving along the slide groove (72) being greater than the diameter of the through hole, and the top end of the slider (73) being vertically fixedly connected with a connecting rod (74), and the top end of the connecting rod (74) being vertically fixedly connected with the bottom of the storage tank (5).

5. The permanent magnet brushless DC motor end cover potting process according to claim 3, characterized in that: A plurality of fan blades (18) are evenly mounted on the surface of the drive shaft (46), and when the drive shaft (46) rotates, the fan blades (18) can generate upward wind.

6. The permanent magnet brushless DC motor end cover potting process according to claim 3, characterized in that: The periphery of the heating rod (44) is hinged with a plurality of swing rods (19), the bottom end of the swing rod (19) is rotatably connected with a knocking ball (20), the surface of the knocking ball (20) is irregularly distributed with bumps of different sizes, and the knocking ball (20) is capable of contacting the inner wall of the iron core (32).

7. The permanent magnet brushless DC motor end cover potting process according to claim 6, characterized in that: A circular baffle (21) is slidably sleeved on the connecting shaft (9), a top rod (22) is vertically fixedly connected to the bottom surface of the baffle (21), the top rod (22) can contact the top of the heating rod (44), a baffle ring (23) is arranged at the bottom of the baffle (21), the baffle ring (23) is fixedly connected to the inner wall of the protective sleeve (8), and the bottom surface of the baffle ring (23) is flush with the bottom surface of the protective sleeve (8), the inner diameter of the baffle ring (23) is smaller than the outer diameter of the baffle (21), and when the protective sleeve (8) contacts the top of the iron core (32), the baffle (21) can be separated from the baffle ring (23) under the support of the top rod (22).

8. The permanent magnet brushless DC motor end cover potting process according to claim 4, characterized in that: A plurality of air inlet pipes (24) are fixedly connected to the inner wall of the bottom of the storage tank (5); the top ends of the air inlet pipes (24) are of a sealed design, and the bottom ends of the air inlet pipes (24) are in communication with the bottom of the storage tank (5).

9. The permanent magnet brushless DC motor end cover potting process according to claim 7, characterized in that: Two positioning rods (25) are vertically slidably inserted into the bottom edge of the protective sleeve (8), and the positioning rods (25) are vertically fixedly connected to the bottom of the packaging platform (1).

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