A multi-functional outer rotor motor assembly tool

Abstract

The application belongs to the technical field of assembly tools, and discloses a multifunctional outer rotor motor assembly tool, which comprises a bottom plate, a first pressing head, a second pressing head, a third pressing head, a fourth pressing head, a magnetic ring base and a universal base. A square column is vertically arranged on one side of the universal base on the bottom plate. A sliding frame is vertically and slidably arranged on the square column. A pressing cylinder with an opening downward is arranged on the sliding frame. The first pressing head, the second pressing head, the third pressing head and the fourth pressing head are respectively inserted and matched with the pressing cylinder. A clamping groove is formed in the universal base. The magnetic ring base is inserted and matched with the clamping groove. The sliding frame drives the pressing cylinder to descend, thereby driving the pressing head inserted and matched with the pressing cylinder to descend. By replacing the first pressing head, the second pressing head, the third pressing head and the fourth pressing head, five assembly processes of riveting of the magnetic ring and the shell of the outer rotor motor, bonding of the fan blade and the shaft, pressing of the shell and the fan blade, pressing of the bearing and the machine frame and installation of the snap spring are adapted, and the applicability is relatively high.

Description

Technical Field

[0001] This utility model relates to the field of assembly tool technology, and in particular to a multifunctional external rotor motor assembly tool. Background Technology

[0002] External rotor motors feature a unique structure with an external rotor and an internal stator. The fan blades of an external rotor motor fan typically consist of a frame, blades, shaft, housing, magnetic ring, bearing, and retaining ring. Currently, the most common method for connecting the housing to the magnetic stripe, and the magnetic stripe to the fan blade, is adhesive bonding.

[0003] However, using adhesive bonding has significant limitations: firstly, it requires waiting for the adhesive to fully react and cure, resulting in low overall work efficiency; secondly, it requires a large amount of adhesive, directly increasing production costs. Meanwhile, current mainstream installation tools also suffer from limited functionality; most tools can only complete one specific installation step, requiring a change of tooling for each subsequent step, which is not only cumbersome but also results in poor overall tool applicability. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a multifunctional external rotor motor assembly tool.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a multifunctional external rotor motor assembly tool, including a base plate, a first pressure head, a second pressure head, a third pressure head, a fourth pressure head, and a magnetic ring base. A universal base is provided on the base plate, and a square column is vertically arranged on one side of the universal base on the base plate. A sliding frame is vertically slidably arranged on the square column, and a pressure cylinder with an opening facing downward is provided on the sliding frame. The first pressure head, the second pressure head, the third pressure head, and the fourth pressure head are respectively inserted and cooperated with the pressure cylinder. A slot is opened on the universal base, and the magnetic ring base is inserted and cooperated with the slot.

[0006] By adopting the above technical solution, a base plate, a first pressure head, a second pressure head, a third pressure head, a fourth pressure head, and a magnetic ring base are set up. The sliding frame slides, causing the pressure cylinder to descend, which in turn causes the pressure head that is inserted and mated with it to descend. By replacing the first, second, third, and fourth pressure heads, the system can accommodate five assembly processes: riveting the magnetic ring of the external rotor motor to the housing, bonding the fan blade to the shaft, pressing the housing to the fan blade, pressing the bearing to the frame, and installing the retaining ring. This makes it highly adaptable. The riveting of the motor magnetic ring to the housing eliminates the need for glue, resulting in lower production costs and higher efficiency.

[0007] Furthermore, the first pressure head includes a first insertion post and a first connecting plate disposed at the lower end of the first insertion post. A first pressure plate is disposed on the bottom surface of the first connecting plate, and a second pressure plate is disposed on the bottom surface of the first pressure plate. The diameter of the first pressure plate is smaller than the diameter of the first connecting plate, and the diameter of the second pressure plate is smaller than the diameter of the first pressure plate. A plurality of pressure feet are also disposed circumferentially at intervals on the bottom surface of the first connecting plate, and grooves are provided on the first pressure plate and the second pressure plate corresponding to the pressure feet.

[0008] By adopting the above technical solution, a first insertion post, a first connecting plate, a first pressure plate, and a second pressure plate are set. The first pressure head is used for riveting the magnetic ring to the housing. The magnetic ring base is first placed in the universal base slot, and then the housing is placed in the magnetic ring base. Next, the magnetic ring is put into the housing. The first pressure head descends, the outer wall of the second pressure plate contacts the inner wall of the magnetic ring, and the bottom surface of the first pressure plate contacts the top surface of the magnetic ring, pressing the magnetic ring into the housing. When the magnetic ring is completely inside the housing, the pressure foot contacts the upper part of the housing and squeezes inward, causing the housing to deform and form a triangular concave riveting mark, thus achieving the riveting to fix the magnetic ring.

[0009] Furthermore, the second pressure head includes a second insertion post and a second connecting plate disposed at the lower end of the second insertion post, wherein the bottom surface of the second connecting plate is provided with concentrically arranged circular holes.

[0010] By adopting the above technical solution, a second plug-in post and a second connecting plate are set. The second pressure head is used to bond the fan blade and the shaft. The fan blade is placed on the slot of the universal base, and then glue is squeezed into the shaft hole of the fan blade. Then the fan blade shaft is placed in the fan blade shaft hole. The second pressure head descends, and the fan blade shaft contacts the bottom of the round hole. The fan blade shaft is pressed down to the predetermined position to achieve the positioning of the bonding.

[0011] Furthermore, the third pressure head includes a third insertion post and a third connecting plate disposed at the lower end of the third insertion post. A third pressure plate is disposed on the bottom surface of the third connecting plate, and a fourth pressure plate is disposed on the bottom surface of the third pressure plate. A clearance hole is concentrically opened on the fourth pressure plate, penetrating the third pressure plate, the third connecting plate, and the third insertion post.

[0012] By adopting the above technical solution, a third plug-in post and a third connecting plate are set. The third pressure head is used to press the housing and the fan blade. The fan blade is placed into the slot of the universal base. Then, the housing assembly with the magnetic ring pressed in is placed in the middle slot of the fan blade. The third pressure head descends, the third connecting plate contacts the top of the housing, the third pressure plate contacts the top of the magnetic ring, the outer wall of the fourth pressure plate contacts the inner wall of the magnetic ring, and the clearance hole avoids the fan blade shaft.

[0013] Furthermore, the fourth pressure head includes a fourth insertion post and a fourth connecting plate disposed at the lower end of the fourth insertion post. A circular groove is formed on the bottom surface of the fourth connecting plate. An external pressure pipe is disposed at the bottom of the circular groove, and an internal pressure pipe is disposed at the bottom of the circular groove. The internal pressure pipe is located inside the external pressure pipe, and the length of the internal pressure pipe is greater than the length of the external pressure pipe.

[0014] By adopting the above technical solution, four insertion pins, a fourth connecting plate, and a fourth pressure head are set up for pressing the bearing to the frame and installing the retaining ring. The frame is placed on a universal base, then the bearing is placed in the bearing hole of the frame. The fourth pressure head descends, and the inner pressure tube contacts the top surface of the bearing, pressing the bearing downwards to the predetermined position within the bearing hole. This completes the installation of the bearing to the frame. Subsequently, the retaining ring is placed on the chamfer of the fan blade shaft. The fourth pressure head descends, and the inner pressure tube presses the retaining ring down into the retaining ring groove of the fan blade shaft.

[0015] Furthermore, the first, second, third, and fourth plug-in posts are respectively plugged into the pressure cylinder, and the diameters of the first, second, third, and fourth connecting discs are larger than the inner diameter of the pressure cylinder.

[0016] Furthermore, a fixing groove is provided on one side of the first plug post, the second plug post, the third plug post, and the fourth plug post, and a screw hole is provided horizontally on the pressure cylinder. The center line of the screw hole is perpendicular to the center line of the pressure cylinder, and a set screw is spirally provided in the screw hole.

[0017] By adopting the above technical solution, a fixing groove and a set screw are set. When inserting the first, second, third, or fourth plug into the pressure cylinder, ensure that the fixing groove is close to the screw hole. After insertion, use a screwdriver to rotate the set screw so that the set screw abuts against the groove wall of the fixing groove to fix the first, second, third, or fourth plug.

[0018] Furthermore, the top surface of the universal base is provided with four L-shaped plates spaced apart circumferentially.

[0019] By adopting the above technical solution and setting up L-shaped plates, when the machine frame is placed on the universal base, the four L-shaped plates respectively limit the four corners of the machine frame, ensuring the stability of the machine frame position.

[0020] Furthermore, the universal base is provided with several circumferentially spaced strip grooves, and all of the strip grooves are connected to the card slot.

[0021] By adopting the above technical solution, a strip groove is set, the number of which is the same as the number of blades of the fan blade. The strip groove is used to accommodate the fan blades of the fan blade and ensure the stability of the fan blade when it is placed.

[0022] Furthermore, the sliding frame includes a square frame that is vertically slidably fitted onto a square column. An extension plate is horizontally provided on one side of the square frame, and an installation port is vertically opened on the extension plate. The pressure cylinder is fixedly connected to the installation port. A horizontal plate is provided at the upper end of the square column, and an electric push rod is vertically provided on the horizontal plate. The push rod of the electric push rod passes downward through the horizontal plate and connects to the top of the pressure cylinder.

[0023] By adopting the above technical solution, the electric push rod pushes the pressure cylinder to rise and fall stably along the direction of the square column.

[0024] In summary, this utility model has the following beneficial effects: This application includes a base plate, a first pressure head, a second pressure head, a third pressure head, a fourth pressure head, and a magnetic ring base. The sliding frame slides, causing the pressure cylinder to descend, which in turn causes the pressure head that is inserted into it to descend. By replacing the first, second, third, and fourth pressure heads, it can accommodate the five assembly processes: riveting the magnetic ring of the external rotor motor to the housing, bonding the fan blade to the shaft, pressing the housing to the fan blade, pressing the bearing to the frame, and installing the retaining ring. This makes it highly adaptable. The riveting of the motor magnetic ring to the housing eliminates the need for glue, resulting in lower production costs and higher efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the general base of this utility model embodiment; Figure 3 This is a schematic diagram of the structure of the pressure cylinder according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the first pressure head in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the second pressure head in an embodiment of this utility model; Figure 6 This is a schematic diagram of the structure of the third pressure head in an embodiment of this utility model; Figure 7 This is a schematic diagram of the structure of the fourth pressure head in an embodiment of this utility model.

[0026] In the diagram: 10. Base plate; 11. Square column; 12. Pressure cylinder; 20. First pressure head; 21. First insertion post; 22. First connecting plate; 23. First pressure plate; 24. Second pressure plate; 25. Pressure foot; 26. Groove; 30. Second pressure head; 31. Second insertion post; 32. Second connecting plate; 33. Round hole; 40. Third pressure head; 41. Third insertion post; 42. Third connecting plate; 43. Third pressure plate; 44. Fourth... 45. Pressure plate; 50. Clearance hole; 51. Fourth pressure head; 52. Fourth insertion post; 53. Fourth connecting plate; 54. Circular groove; 55. External pressure tube; 60. Internal pressure tube; 61. Universal base; 62. L-shaped plate; 63. Card slot; 70. Strip groove; 71. Magnetic ring base; 80. Placement slot; 81. Sliding frame; 82. Square frame; 83. Extension plate; 84. Horizontal plate; 90. Electric push rod; 91. Fixing slot; 92. Set screw. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] like Figure 1-7 As shown in the embodiment of this application, a multifunctional external rotor motor assembly tool is disclosed, including a base plate 10, a first pressure head 20, a second pressure head 30, a third pressure head 40, a fourth pressure head 50, and a magnetic ring base 70. A universal base 60 is provided on the base plate 10, and a square column 11 is vertically arranged on one side of the universal base 60 on the base plate 10. A sliding frame 80 is vertically slidably arranged on the square column 11, and a pressure cylinder 12 with its opening facing downward is provided on the sliding frame 80. The first pressure head 20, the second pressure head 30, the third pressure head 40, and the fourth pressure head 50 are respectively inserted and engaged with the pressure cylinder 12. A slot 62 is opened on the universal base 60, and the magnetic ring base 70 is inserted and engaged with the slot 62. A placement groove 71 is opened on the top of the magnetic ring base 70. The sliding frame 80 slides, causing the pressure cylinder 12 to descend, thereby causing the pressure head inserted and engaged with it to descend. By replacing the first pressure head 20, the second pressure head 30, the third pressure head 40, and the fourth pressure head 50, the five assembly processes of riveting the external rotor motor magnetic ring to the housing, bonding the fan blade to the shaft, pressing the housing to the fan blade, pressing the bearing to the frame, and installing the retaining ring are adapted to achieve efficient production operations and have strong applicability. The motor magnetic ring is riveted to the housing, eliminating the need for glue, resulting in lower production costs and higher efficiency.

[0029] Specifically, the first pressure head 20 includes a first insertion post 21 and a first connecting plate 22 disposed at the lower end of the first insertion post 21. The diameter of the first connecting plate 22 is larger than the diameter of the first insertion post 21. A first pressure plate 23 is disposed on the bottom surface of the first connecting plate 22, and a second pressure plate 24 is disposed on the bottom surface of the first pressure plate 23. The diameter of the first pressure plate 23 is smaller than the diameter of the first connecting plate 22, and the diameter of the second pressure plate 24 is smaller than the diameter of the first pressure plate 23. A plurality of pressure feet 25 are also circumferentially spaced on the bottom surface of the first connecting plate 22, and grooves 26 are formed on the first pressure plate 23 and the second pressure plate 24 corresponding to the pressure feet 25. The first pressure head 20 is used for riveting the magnetic ring to the housing. The magnetic ring base 70 is first placed in the slot 62 of the universal base 60, and then the housing is placed in the placement slot 71 of the magnetic ring base 70. Next, the magnetic ring is inserted into the housing, the first pressure head 20 descends, the outer wall of the second pressure plate 24 contacts the inner wall of the magnetic ring, and the bottom surface of the first pressure plate 23 contacts the top surface of the magnetic ring, pressing the magnetic ring into the housing. Once the magnetic ring is fully inside the housing, the pressure foot 25 contacts the upper part of the housing and presses inward, causing the housing to deform and form a triangular concave riveting mark, thus securing the magnetic ring with the riveting. The diameter of the second pressure plate 24 is smaller than the outer diameter of the magnetic ring but larger than the inner diameter, leaving space for housing deformation. The shape and number of pressure feet 25 are selected according to the specific motor conditions. Increasing the number of pressure angles can disperse the pressure, reducing the pressure on the housing after the magnetic ring is deformed, thus alleviating magnetic ring deformation. Increasing the angle of irregular pressure angles can increase housing deformation, making the connection between the housing and the magnetic ring tighter.

[0030] During setup, the second pressure head 30 includes a second insertion post 31 and a second connecting plate 32 located at the lower end of the second insertion post 31. The diameter of the second connecting plate 32 is larger than the diameter of the second insertion post 31, and the bottom surface of the second connecting plate 32 has concentrically arranged circular holes 33. The second pressure head 30 is used for bonding the fan blade to the shaft. The fan blade is placed on the slot 62 of the universal base 60, and then glue is squeezed into the shaft hole of the fan blade. Then, the fan blade shaft is placed in the fan blade shaft hole, and the second pressure head 30 descends. The fan blade shaft contacts the bottom of the circular hole 33, and the fan blade shaft is pressed down to the predetermined position, achieving the positioning of the bonding. The slot 62 limits the fan blade, and the circular hole 33 limits the shaft, which can better maintain the perpendicularity of the shaft and the fan blade surface, and also better ensure the concentricity of the shaft working surface and the outer circle of the fan blade, reduce the fan blade deflection, and ensure the fan blade performance and life. The universal base 60 has several circumferentially spaced strip grooves 63, all of which are connected to the slots 62. The number of strip grooves 63 is the same as the number of fan blades. The strip grooves 63 are used to accommodate the fan blades and ensure the stability of the fan blades when placed.

[0031] The third pressure head 40 includes a third insertion post 41 and a third connecting plate 42 disposed at the lower end of the third insertion post 41. The diameter of the third connecting plate 42 is larger than the diameter of the third insertion post 41. A third pressure plate 43 is disposed on the bottom surface of the third connecting plate 42, and a fourth pressure plate 44 is disposed on the bottom surface of the third pressure plate 43. The diameter of the third pressure plate 43 is smaller than the diameter of the third connecting plate 42, and the diameter of the fourth pressure plate 44 is smaller than the diameter of the third pressure plate 43. A clearance hole 45 is concentrically formed on the fourth pressure plate 44, penetrating the third pressure plate 43, the third connecting plate 42, and the third insertion post 41. The third pressure head 40 is used for pressing the housing and the fan blade. The fan blade is placed into the slot 62 of the universal base 60, and then the housing assembly with the magnetic ring pressed in is placed in the middle slot of the fan blade. The third pressure head 40 descends, the third connecting plate 42 contacts the top of the housing, the third pressure plate 43 contacts the top of the magnetic ring, and the outer wall of the fourth pressure plate 44 contacts the inner wall of the magnetic ring. The clearance hole 45 provides clearance for the fan blade shaft. The slot 62 limits the movement of the fan blades, preventing misalignment between the housing and the fan blades during installation, resulting in a smoother crimping process and more even stress distribution. It also makes it easier to maintain the concentricity of the housing and fan blades after crimping.

[0032] In its specific configuration, the fourth pressure head 50 includes a fourth insertion post 51 and a fourth connecting plate 52 located at the lower end of the fourth insertion post 51. The diameter of the fourth connecting plate 52 is larger than the diameter of the fourth insertion post 51. A circular groove 53 is formed on the bottom surface of the fourth connecting plate 52. An external pressure pipe 54 is provided at the bottom of the groove 53, and an internal pressure pipe 55 is provided at the bottom of the groove 53. The internal pressure pipe 55 is located inside the external pressure pipe 54, and its length is greater than that of the external pressure pipe 54. The fourth pressure head 50 is used for pressing the bearing to the frame and installing the retaining ring. The frame is placed on the universal base 60, and then the bearing is placed in the bearing hole of the frame. The fourth pressure head 50 descends, and the internal pressure pipe 55 contacts the top surface of the bearing, pressing the bearing downward to a predetermined position in the bearing hole. At this time, the external pressure pipe 54 contacts the top of the frame. This completes the installation of the bearing to the frame, ensuring the position and pressing distance of the bearing in the bearing seat of the frame, and the parallelism between the bearing and the fan blade surface, to avoid damaging or crushing the bearing. Subsequently, the retaining circlip is placed on the chamfer of the fan blade shaft, and the fourth pressure head 50 descends, with the inner pressure tube 55 pressing the retaining circlip down into the retaining circlip groove on the fan blade shaft. Ensure the retaining circlip is parallel to the shaft end face, ensuring precise pressing into the retaining circlip groove on the fan blade shaft, avoiding damage to the retaining circlip. Four L-shaped plates 61 are circumferentially spaced on the top surface of the universal base 60. With the L-shaped plates 61 in place, when the frame is placed on the universal base 60, the four L-shaped plates 61 respectively limit the four corners of the frame, ensuring the stability of the frame position.

[0033] The first insertion post 21, the second insertion post 31, the third insertion post 41, and the fourth insertion post 51 are respectively inserted into the pressure cylinder 12. The diameters of the first connecting plate 22, the second connecting plate 32, the third connecting plate 42, and the fourth connecting plate 52 are larger than the inner diameter of the pressure cylinder 12. A fixing groove 90 is provided on one side of each of the first insertion post 21, the second insertion post 31, the third insertion post 41, and the fourth insertion post 51. A screw hole is horizontally provided on the pressure cylinder 12, with the center line of the screw hole perpendicular to the center line of the pressure cylinder 12. A set screw 91 is screwed into the screw hole. When inserting the first insertion post 21, the second insertion post 31, the third insertion post 41, or the fourth insertion post 51 into the pressure cylinder 12, ensure that the fixing groove 90 is close to the screw hole. After insertion, use a screwdriver to rotate the set screw 91 so that the set screw 91 abuts against the groove wall of the fixing groove 90, thus fixing the first insertion post 21, the second insertion post 31, the third insertion post 41, or the fourth insertion post 51.

[0034] The sliding frame 80 includes a square frame 81 that slides vertically onto a square column 11. An extension plate 82 is horizontally positioned on one side of the square frame 81, and a vertical mounting opening is provided on the extension plate 82. The pressure cylinder 12 is fixedly connected to the mounting opening. A horizontal plate 83 is positioned at the upper end of the square column 11, and an electric push rod 84 is vertically positioned on the horizontal plate 83. The push rod of the electric push rod 84 passes downward through the horizontal plate 83 and connects to the top of the pressure cylinder 12. The electric push rod 84 pushes the pressure cylinder 12 to move stably up and down along the direction of the square column 11.

[0035] A control cabinet is installed on the base plate 10. The control cabinet is equipped with control buttons and a controller is installed inside the control cabinet. The controller receives signals from the control buttons to control the descent position of the electric push rod 84.

[0036] The working principle of a multifunctional external rotor motor assembly tool in this embodiment is as follows: Select the corresponding pressure head according to the external rotor motor assembly process to be completed. When changing the pressure head, use a screwdriver to loosen the set screw 91 on the pressure cylinder 12, remove the old pressure head, insert the plug of the new pressure head into the pressure cylinder 12, align the pressure head fixing groove 90 with the screw hole of the pressure cylinder 12, and then tighten the set screw 91 to fix the pressure head. Next, the workpiece is positioned and placed. If the magnetic ring is riveted to the housing, the magnetic ring base 70 is placed into the slot 62 of the universal base 60, the housing is placed on the magnetic ring base 70, and the magnetic ring is fitted into the housing. If the fan blade is bonded to the fan blade shaft, the fan blade is placed into the slot 62 of the universal base 60, the fan blade is embedded in the strip groove 63, glue is squeezed into the fan blade shaft hole, and the fan blade shaft is placed in. If the housing and fan blade are pressed together, the fan blade is placed into the slot 62, and the housing assembly with the magnetic ring is placed in the middle groove of the fan blade. If the bearing is pressed together with the frame and the retaining spring is installed, the frame is placed on the universal base 60, the bearing is placed into the bearing hole of the frame, and then the electric push rod 84 is started, which drives the sliding frame 80, the pressure cylinder 12, and the pressure head to descend, completing the corresponding pressing operation.

[0037] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A multifunctional external rotor motor assembly tool, characterized in that: The device includes a base plate (10), a first pressure head (20), a second pressure head (30), a third pressure head (40), a fourth pressure head (50), and a magnetic ring base (70). A universal base (60) is provided on the base plate (10). A square column (11) is vertically arranged on one side of the universal base (60) on the base plate (10). A sliding frame (80) is vertically slidably arranged on the square column (11). A pressure cylinder (12) with its opening facing downward is provided on the sliding frame (80). The first pressure head (20), the second pressure head (30), the third pressure head (40), and the fourth pressure head (50) are respectively inserted into the pressure cylinder (12). A slot (62) is opened on the universal base (60). The magnetic ring base (70) is inserted into the slot (62).

2. The multifunctional external rotor motor assembly tool according to claim 1, characterized in that: The first pressure head (20) includes a first insertion post (21) and a first connecting plate (22) disposed at the lower end of the first insertion post (21). A first pressure plate (23) is disposed on the bottom surface of the first connecting plate (22), and a second pressure plate (24) is disposed on the bottom surface of the first pressure plate (23). The diameter of the first pressure plate (23) is smaller than the diameter of the first connecting plate (22), and the diameter of the second pressure plate (24) is smaller than the diameter of the first pressure plate (23). A plurality of pressure feet (25) are also circumferentially spaced on the bottom surface of the first connecting plate (22). The first pressure plate (23) and the second pressure plate (24) have grooves (26) corresponding to the pressure feet (25).

3. The multifunctional external rotor motor assembly tool according to claim 2, characterized in that: The second pressure head (30) includes a second plug (31) and a second connecting plate (32) disposed at the lower end of the second plug (31). The bottom surface of the second connecting plate (32) is provided with concentrically arranged circular holes (33).

4. The multifunctional external rotor motor assembly tool according to claim 3, characterized in that: The third pressure head (40) includes a third insertion post (41) and a third connecting plate (42) disposed at the lower end of the third insertion post (41). A third pressure plate (43) is disposed on the bottom surface of the third connecting plate (42), and a fourth pressure plate (44) is disposed on the bottom surface of the third pressure plate (43). A clearance hole (45) is concentrically opened on the fourth pressure plate (44) through the third pressure plate (43), the third connecting plate (42), and the third insertion post (41).

5. The multifunctional external rotor motor assembly tool according to claim 4, characterized in that: The fourth pressure head (50) includes a fourth plug (51) and a fourth connecting plate (52) disposed at the lower end of the fourth plug (51). A circular groove (53) is provided on the bottom surface of the fourth connecting plate (52). An external pressure pipe (54) is provided at the bottom of the circular groove (53). An internal pressure pipe (55) is provided at the bottom of the circular groove (53). The internal pressure pipe (55) is located inside the external pressure pipe (54) and the length of the internal pressure pipe (55) is greater than the length of the external pressure pipe (54).

6. The multifunctional external rotor motor assembly tool according to claim 5, characterized in that: The first plug-in post (21), the second plug-in post (31), the third plug-in post (41), and the fourth plug-in post (51) are respectively plugged into the pressure cylinder (12). The diameters of the first connecting plate (22), the second connecting plate (32), the third connecting plate (42), and the fourth connecting plate (52) are larger than the inner diameter of the pressure cylinder (12).

7. The multifunctional external rotor motor assembly tool according to claim 6, characterized in that: The first plug-in post (21), the second plug-in post (31), the third plug-in post (41), and the fourth plug-in post (51) have a fixing groove (90) on one side. The pressure cylinder (12) has a screw hole horizontally. The center line of the screw hole is perpendicular to the center line of the pressure cylinder (12). A set screw (91) is spirally arranged in the screw hole.

8. The multifunctional external rotor motor assembly tool according to claim 1, characterized in that: The top surface of the universal base (60) is provided with four L-shaped plates (61) spaced apart in a circumferential manner.

9. A multifunctional external rotor motor assembly tool according to claim 1, characterized in that: The universal base (60) has several circumferentially spaced strip grooves (63), and all of the strip grooves (63) are connected to the slots (62).

10. A multifunctional external rotor motor assembly tool according to claim 1, characterized in that: The sliding frame (80) includes a square frame (81) that is vertically slidably fitted onto a square column (11). An extension plate (82) is horizontally arranged on one side of the square frame (81). An installation port is vertically opened on the extension plate (82). The pressure cylinder (12) is fixedly connected to the installation port. A horizontal plate (83) is arranged at the upper end of the square column (11). An electric push rod (84) is vertically arranged on the horizontal plate (83). The push rod of the electric push rod (84) passes downward through the horizontal plate (83) and connects to the top of the pressure cylinder (12).

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