Permanent magnet motor assembly device

Abstract

The present invention discloses a permanent magnet motor assembly device, which relates to the technical field of permanent magnet motor assembly, and includes a motor rotor, a neodymium iron boron magnet, and a workbench. The bottom of the workbench is fixedly mounted with a base, a sliding seat for placing the motor rotor is slidably arranged on the base, a first curved plate is fixedly mounted on the top of the sliding seat, a second curved plate is arranged inside the workbench, and both ends of the second curved plate are fixedly connected to the inner walls of both sides of the workbench. The workbench is sequentially provided with a first mounting plate, a second mounting plate, and a third mounting plate from top to bottom. The present invention arranges the center of the circular ring formed by the first curved plate and the second curved plate to be coaxial with the center of the rotating cylinder, so that the motor rotor can always be located directly below the rotating cylinder during assembly, thereby reducing errors generated during the assembly of the permanent magnet motor.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motor assembly, and in particular to a permanent magnet motor assembly device. Background Art

[0002] Air-cooled island fan power varies cubically with load and speed. In spring, autumn, and winter, fan load rates are very low. This characteristic allows the design and production of a permanent magnet motor with a permanent magnet variable-frequency low-speed direct-drive motor as its core, and a vector inverter and related control devices as its hardware foundation. This eliminates the traditional reduction gearbox structure, with the permanent magnet synchronous motor directly connected to the fan blades, resulting in a weight reduction lower than the traditional reduction gearbox plus motor combination. The permanent magnet motor, controlled by a frequency converter, offers excellent energy savings, low noise, long service life, smooth operation, and reliable performance.

[0003] The existing invention patent with patent announcement number CN115882673B discloses a permanent magnet motor assembly device. The invention places several NdFeB magnets in sequence inside a storage hole, lowers the lifting rack to the position of the limit block, and then presses down the pull ring. The NdFeB magnets inside the storage hole are squeezed by the squeezing block on the squeezing ring, making it easier for the NdFeB magnets to be installed inside the motor rotor. There is no need for people to manually insert the permanent magnets one by one into the rotor assembly. The operation is simple and improves people's assembly of the rotor assembly.

[0004] However, this invention patent still has the following problems: existing permanent magnet motors, especially permanent magnet motors used in dry air-cooled islands, generally have large bodies and are difficult to place in the center of the mounting base, resulting in the positioning device being unable to accurately locate the center of the permanent magnet motor, causing large errors during assembly of the permanent magnet motor. During assembly, the position of the motor also needs to be fine-tuned, which makes the operation difficult and inconvenient for the assembly of the permanent magnet motor. Summary of the Invention

[0005] The purpose of the present invention is to provide a permanent magnet motor assembly device that solves the technical problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A permanent magnet motor assembly device includes a motor rotor, a neodymium iron boron magnet and a workbench, wherein a base is fixedly installed at the bottom of the workbench, a sliding seat for placing the motor rotor is slidably provided on the base, a first arc-shaped plate is fixedly installed on the top of the sliding seat, a second arc-shaped plate is provided inside the workbench, and both ends of the second arc-shaped plate are fixedly connected to the inner walls of both sides of the workbench, the workbench is sequentially provided with a first mounting plate, a second mounting plate and a third mounting plate from top to bottom, a cylinder is fixedly installed on the top of the first mounting plate, and a push frame is fixedly installed on the output end of the cylinder, A rotating cylinder is rotatably connected to the bottom of the second mounting plate, and a circumferential array of accommodating grooves for accommodating neodymium iron boron magnets is provided on the side wall of the rotating cylinder. A mounting hole for allowing the pushing frame to pass through is also provided in the middle of the second mounting plate. An electric push rod is fixedly mounted on the third mounting plate, and the electric push rod is arranged on one side of the rotating cylinder and the output end of the electric push rod is facing one of the accommodating grooves on the rotating cylinder. An L-shaped frame is fixedly mounted on the output end of the electric push rod, and a discharge box for loading neodymium iron boron magnets is also fixedly mounted on the third mounting plate, and the opening of the discharge box is arranged towards the opening of the L-shaped frame.

[0008] Furthermore, a plurality of push plates are installed in a circumferential array at the bottom of the pushing frame. The number of the push plates is the same as the number of the accommodating slots, and the shapes of the push plates are adapted to the accommodating slots.

[0009] Furthermore, when the first arc plate moves to the bottom of the working frame, the center of the circle formed by the first arc plate and the second arc plate is on the same axis as the center of the rotating cylinder, and the inner diameter of the circle formed by the first arc plate and the second arc plate is the same as the outer diameter of the motor rotor.

[0010] Furthermore, a first motor is fixedly mounted on one end of the base, a threaded rod is fixedly mounted on the output end of the first motor, one end of the threaded rod is rotatably connected to the base, and the bottom of the sliding seat is threadedly connected to the threaded rod.

[0011] Furthermore, a feeding assembly for circulating neodymium iron boron magnets into the rotating cylinder is provided in the working frame, and the feeding assembly includes a gear ring, a rack, a gear, a ratchet and a shift rod. The gear ring is coaxially fixedly mounted on the upper part of the rotating cylinder, the rack is slidably mounted on the bottom of the second mounting plate, and a row of first teeth is provided on the upper part of the rack, and a row of second teeth is provided on the lower part of the rack. A rotating column is coaxially fixedly mounted on the top of the gear, and the rotating column is rotatably mounted on the bottom of the second mounting plate, and one end of the first tooth is engaged with the gear ring, and the second tooth is engaged with the gear, the ratchet is coaxially fixedly mounted on the lower part of the gear, the shift rod is fixedly mounted on the upper part of the L-shaped frame, and a one-way transmission member is provided at one end of the shift rod.

[0012] Furthermore, the one-way transmission member includes a fixed block and a rotating block, the fixed block is fixedly mounted on the side of the lever close to the ratchet, the rotating block is rotatably mounted on the fixed block via a rotating shaft, and a spiral spring is connected between the rotating shaft of the rotating block and the fixed block.

[0013] Furthermore, the side wall of the rotating column is provided with a plurality of elastic balls in a circumferential array, the number of the elastic balls is the same as the number of the accommodating grooves, and the inner circumferential array of the second mounting plate is provided with a plurality of grooves which are the same in number as the elastic balls and can accommodate the elastic balls.

[0014] Furthermore, a wedge-shaped plate is slidably mounted at the opening of the L-shaped frame, and one side of the wedge-shaped plate is connected to the L-shaped frame via a return spring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention arranges the center of the ring formed by the first curved plate and the second curved plate to be coaxial with the center of the rotating cylinder, so that the motor rotor can always be located directly below the rotating cylinder during assembly, reducing errors generated during assembly of the permanent magnet motor, greatly reducing operational difficulty, and reducing the time spent on accurately placing the motor rotor, making the entire assembly process simpler and faster, effectively improving assembly efficiency, and precise assembly can ensure the matching accuracy between the various components of the permanent magnet motor, reducing problems such as component wear and vibration caused by assembly errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0018] Figure 1 A schematic structural diagram of a permanent magnet motor assembly device provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of an assembly state of a permanent magnet motor assembly device provided by an embodiment of the present invention;

[0020] Figure 3 A bottom view of a permanent magnet motor assembly device provided by an embodiment of the present invention;

[0021] Figure 4 A schematic structural diagram of a feeding assembly provided in an embodiment of the present invention;

[0022] Figure 5 Provided for embodiments of the present invention Figure 4 A schematic diagram of the structure of part A shown in FIG;

[0023] Figure 6 A schematic structural diagram of a one-way transmission member provided in an embodiment of the present invention;

[0024] Figure 7 A cross-sectional view of a second mounting plate provided in an embodiment of the present invention.

[0025] The numbers in the figure represent the following:

[0026] 1. Motor rotor; 2. NdFeB magnet; 3. Work stand; 4. Base; 5. Sliding seat; 11. First curved plate; 12. Second curved plate; 21. First mounting plate; 22. Second mounting plate; 23. Third mounting plate; 6. Cylinder; 7. Push frame; 8. Rotating cylinder; 81. Receiving groove; 31. Electric push rod; 32. L-shaped frame; 33. Discharge box; 71. Push plate; 41. First motor; 42. Threaded rod; 9. Feeding assembly; 91. Gear ring; 92. Rack; 93. Gear; 94. Ratchet; 95. Push rod; 96. First tooth; 97. Second tooth; 98. Rotating column; 10. One-way transmission member; 101. Fixed block; 102. Rotating block; 103. Volute spring; 104. Elastic ball; 321. Wedge plate; 322. Return spring. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figures 1 to 7As shown, the present invention provides a permanent magnet motor assembly device, including a motor rotor 1, a neodymium iron boron magnet 2 and a work frame 3, the bottom of the work frame 3 is fixedly installed with a base 4, the base 4 is slidably provided with a sliding seat 5 for placing the motor rotor 1, the top of the sliding seat 5 is fixedly installed with a first arc plate 11, the interior of the work frame 3 is provided with a second arc plate 12, the two ends of the second arc plate 12 are fixedly connected to the inner walls of both sides of the work frame 3, the work frame 3 is sequentially provided with a first mounting plate 21, a second mounting plate 22 and a third mounting plate 23 from top to bottom, the top of the first mounting plate 21 is fixedly installed with a cylinder 6, the output end of the cylinder 6 is fixedly installed with a push frame 7, The lower part of the second mounting plate 22 is rotatably connected to the rotating cylinder 8, and the circumferential array of the side wall of the rotating cylinder 8 is provided with a receiving groove 81 for accommodating the neodymium iron boron magnet 2. The middle part of the second mounting plate 22 is also provided with a mounting hole for allowing the push frame 7 to pass through. The third mounting plate 23 is fixedly mounted with an electric push rod 31, and the electric push rod 31 is arranged on one side of the rotating cylinder 8 and the output end of the electric push rod 31 is facing one of the receiving grooves 81 on the rotating cylinder 8. The output end of the electric push rod 31 is fixedly mounted with an L-shaped frame 32. The third mounting plate 23 is also fixedly mounted with a discharge box 33 for loading the neodymium iron boron magnet 2, and the opening of the discharge box 33 is arranged toward the opening of the L-shaped frame 32.

[0029] Specifically, a plurality of push plates 71 are installed in a circumferential array at the bottom of the pushing frame 7 . The number of the push plates 71 is the same as the number of the accommodating slots 81 , and the shapes of the push plates 71 are adapted to the accommodating slots 81 .

[0030] Specifically, when the first curved plate 11 moves to the bottom of the working frame 3 , the center of the circle formed by the first curved plate 11 and the second curved plate 12 is on the same axis as the center of the rotating cylinder 8 , and the inner diameter of the circle formed by the first curved plate 11 and the second curved plate 12 is the same as the outer diameter of the motor rotor 1 .

[0031] Specifically, a first motor 41 is fixedly mounted on one end of the base 4 , a threaded rod 42 is fixedly mounted on the output end of the first motor 41 , one end of the threaded rod 42 is rotatably connected to the base 4 , and the bottom of the sliding seat 5 is threadedly connected to the threaded rod 42 .

[0032] Start the first motor 41 on the base 4, and the first motor 41 drives the threaded rod 42 to rotate, thereby driving the sliding seat 5 to move toward the bottom center of the workbench 3. When the motor rotor 1 gradually moves to the bottom center of the workbench 3, the first curved plate 11 and the second curved plate 12 form a circular ring that can completely wrap the motor rotor 1. Since the inner diameter of the circular ring formed by the first curved plate 11 and the second curved plate 12 is the same as the outer diameter of the motor rotor 1, and the center of the circular ring formed by the first curved plate 11 and the second curved plate 12 is arranged to be on the same axis as the center of the rotating cylinder 8, the motor rotor 1 can always be located directly below the rotating cylinder 8 during assembly, thereby reducing the error generated during the assembly of the permanent magnet motor.

[0033] Specifically, a feeding assembly 9 for circulating the NdFeB magnets 2 into the rotating cylinder 8 is provided in the working frame 3, and the feeding assembly 9 includes a gear ring 91, a rack 92, a gear 93, a ratchet 94 and a shift rod 95. The gear ring 91 is coaxially fixedly mounted on the upper part of the rotating cylinder 8, the rack 92 is slidably mounted on the bottom of the second mounting plate 22, and a row of first teeth 96 is provided on the upper part of the rack 92, and a row of second teeth 97 is provided on the lower part of the rack 92. A rotating column 98 is coaxially fixedly mounted on the top of the gear 93, and the rotating column 98 is rotatably mounted on the bottom of the second mounting plate 22, and one end of the first teeth 96 is engaged with the gear ring 91, and the second teeth 97 are engaged with the gear 93. The ratchet 94 is coaxially fixedly mounted on the lower part of the gear 93, and the shift rod 95 is fixedly mounted on the upper part of the L-shaped frame 32. One end of the shift rod 95 is provided with a one-way transmission member 10.

[0034] More specifically, the one-way transmission member 10 includes a fixed block 101 and a rotating block 102. The fixed block 101 is fixedly mounted on the side of the lever 95 close to the ratchet 94. The rotating block 102 is rotatably mounted on the fixed block 101 via a rotating shaft, and a spiral spring 103 is connected between the rotating shaft of the rotating block 102 and the fixed block 101.

[0035] More specifically, a plurality of elastic balls 104 are provided in a circumferential array on the side wall of the rotating column 98, and the number of the elastic balls 104 is the same as the number of the accommodating grooves 81, and a plurality of grooves having the same number as the elastic balls 104 and capable of accommodating the elastic balls 104 are opened in an inner circumferential array of the second mounting plate 22.

[0036] Start the electric push rod 31, which pushes the L-shaped frame 32 toward the rotating cylinder 8, and then engages the neodymium iron boron magnet 2 into the receiving groove 81 in the rotating cylinder 8. During the movement of the L-shaped frame 32, the lever 95 on the L-shaped frame 32 passes through the gear 93, and then the rotating block 102 on the one-way transmission member 10 contacts the ratchet 94. Due to the restriction of the fixed block 101, when the L-shaped frame 32 moves toward the rotating cylinder 8, after the rotating block 102 contacts the ratchet teeth on the ratchet 94, the rotating block 102 cannot rotate and can only rotate the ratchet 94 to a certain angle, so that the ratchet 94 drives the gear 93 to rotate. When the lever 95 moves in the opposite direction, the rotating block 102 can rotate and is reset by the volute spring 103, and the ratchet 94 will not rotate. As the wheel 93 rotates through the rotating column 98, the elastic ball 104 and the groove are set so that each time the rotating column 98 rotates, the elastic ball 104 located in one groove will move and engage into the next groove. This design makes the rotation angle of the rotating column 98 fixed each time. At the same time, by setting the transmission ratio between the gear ring 91 and the first tooth 96 and the gear 93 and the second tooth 97, the rotation angle of the gear ring 91 is consistent with the rotation angle of the gear 93. In this way, during the reciprocating motion of the L-shaped frame 32 to assemble the NdFeB magnet 2, the rotating cylinder 8 will rotate a fixed angle once, so that the L-shaped frame 32 can cyclically add the NdFeB magnet 2 into the rotating cylinder 8 until the NdFeB magnet 2 can be accurately placed in the accommodating groove 81 of the rotating cylinder 8.

[0037] Specifically, a wedge-shaped plate 321 is slidably mounted at the opening of the L-shaped frame 32. One side of the wedge-shaped plate 321 is connected to the L-shaped frame 32 via a return spring 322. When the NdFeB magnet 2 enters the L-shaped frame 32, it squeezes the wedge-shaped plate 321 on the L-shaped frame 32, forcing the wedge-shaped plate 321 into the L-shaped frame 32. After the NdFeB magnet 2 is completely inside the L-shaped frame 32, the wedge-shaped plate 321 is reset by the return spring 322. After the wedge-shaped plate 321 rebounds, it can secure the NdFeB magnet 2.

[0038] When the device is working, the NdFeB magnets 2 to be assembled can be placed in the discharge box 33 first. After the NdFeB magnets 2 are prepared, several NdFeB magnets 2 can be sequentially transferred from the storage box to the L-shaped frame 32 through the existing transmission method. When the NdFeB magnets 2 enter the L-shaped frame 32, the wedge plate 321 on the L-shaped frame 32 is squeezed, and the wedge plate 321 is squeezed into the interior of the L-shaped frame 32. After the NdFeB magnets 2 are completely entered into the L-shaped frame 32, the wedge plate 321 is reset by the reset spring 322. After the wedge plate 321 rebounds, the NdFeB magnets 2 can be fixed. Then the electric push rod 31 is started, and the electric push rod 31 is pressed. Push the L-shaped frame 32 toward the rotating cylinder 8, and then engage the NdFeB magnet 2 into the receiving groove 81 in the rotating cylinder 8. During the movement of the L-shaped frame 32, the lever 95 on the L-shaped frame 32 passes the gear 93, and then the rotating block 102 on the one-way transmission member 10 contacts the ratchet 94. Due to the restriction of the fixed block 101, when the L-shaped frame 32 moves toward the rotating cylinder 8, the rotating block 102 contacts the ratchet teeth on the ratchet 94, and the rotating block 102 cannot rotate, and can only rotate the ratchet 94 to a certain angle, so that the ratchet 94 drives the gear 93 to rotate. When the lever 95 moves in the opposite direction, the rotating block 102 can rotate and The volute spring 103 is reset to prevent the ratchet 94 from rotating. In the process of the gear 93 rotating through the rotating column 98, the elastic ball 104 and the groove are set so that each time the rotating column 98 rotates, the elastic ball 104 located in one groove will move and engage into the next groove. This design makes the rotation angle of the rotating column 98 fixed each time. At the same time, by setting the transmission ratio of the gear ring 91 and the first tooth 96 and the gear 93 and the second tooth 97, the rotation angle of the gear ring 91 is consistent with the rotation angle of the gear 93. In this way, in the process of the L-shaped frame 32 reciprocatingly assembling the neodymium iron boron magnet 2, the rotating cylinder 8 will rotate a fixed angle once, so that the L-shaped frame 32 can cyclically add the NdFeB magnets 2 into the rotating cylinder 8 until the NdFeB magnets 2 can be accurately placed in the receiving grooves 81 of the rotating cylinder 8. The engagement of the NdFeB magnets 2 and the rotation of the rotating cylinder 8 can be completed quickly and continuously, which greatly shortens the assembly time of each NdFeB magnet 2, thereby improving the overall production efficiency. In addition, manual assembly may have errors, such as the magnet not being engaged in place, the rotating angle of the rotating cylinder 8 being inaccurate, etc., which will affect the performance and quality of the product. The present device can improve the accuracy and consistency of assembly through precise mechanical structure and transmission ratio setting.

[0039] After the NdFeB magnets 2 are assembled in the rotating cylinder 8, the staff can place the motor rotor 1 to be installed on the sliding seat 5 through transportation equipment such as hoisting equipment. At this time, it is not necessary to accurately place the motor rotor 1 in the center of the sliding seat 5. It is only necessary to place the motor rotor 1 on the inner side of the arc surface of the first arc plate 11. Then, the first motor 41 on the base 4 is started. The first motor 41 drives the threaded rod 42 to rotate, thereby driving the sliding seat 5 to move toward the bottom center of the workbench 3. When the motor rotor 1 gradually moves to the bottom center of the workbench 3, the first arc plate 11 and the second arc plate 12 form a ring that can completely wrap the motor rotor 1. Due to the first arc The inner diameter of the ring formed by the first curved plate 11 and the second curved plate 12 is the same as the outer diameter of the motor rotor 1, and by setting the center of the ring formed by the first curved plate 11 and the second curved plate 12 to be on the same axis as the center of the rotating cylinder 8, the motor rotor 1 can always be located directly below the rotating cylinder 8 during assembly, reducing the error generated during the assembly of the permanent magnet motor, greatly reducing the difficulty of operation, and reducing the time spent on accurately placing the motor rotor 1, making the entire assembly process simpler and faster, effectively improving the assembly efficiency, and precise assembly can ensure the matching accuracy between the various components of the permanent magnet motor, reducing problems such as component wear and vibration caused by assembly errors.

[0040] After the position of the motor rotor 1 is determined, the cylinder 6 is started, and the cylinder 6 drives the push frame 7 to move downward, so that each push plate 71 on the push frame 7 passes through the corresponding receiving groove 81 on the rotating cylinder 8, and several NdFeB magnets 2 are accurately assembled into the motor rotor 1, thereby completing the assembly of the permanent magnet motor. The synchronous assembly method ensures the consistency of the relative position and angle of each NdFeB magnet 2 on the motor rotor 1, improves the magnetic field uniformity and operation stability of the permanent magnet motor, and helps to improve the overall performance and quality of the permanent magnet motor.

[0041] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A permanent magnet motor assembly device, comprising a motor rotor (1), a neodymium iron boron magnet (2) and a work stand (3), characterized in that: The bottom of the working frame (3) is fixedly mounted with a base (4), a sliding seat (5) for placing the motor rotor (1) is slidably mounted on the base (4), a first arc-shaped plate (11) is fixedly mounted on the top of the sliding seat (5), a second arc-shaped plate (12) is arranged inside the working frame (3), two ends of the second arc-shaped plate (12) are fixedly connected to the inner walls of both sides of the working frame (3), the working frame (3) is sequentially provided with a first mounting plate (21), a second mounting plate (22) and a third mounting plate (23) from top to bottom, a cylinder (6) is fixedly mounted on the top of the first mounting plate (21), a pushing frame (7) is fixedly mounted on the output end of the cylinder (6), and a rotating cylinder (23) is rotatably connected to the bottom of the second mounting plate (22). 8), a circumferential array of accommodating grooves (81) for accommodating neodymium iron boron magnets (2) is provided on the side wall of the rotating cylinder (8), a mounting hole for allowing the push frame (7) to pass through is also provided in the middle of the second mounting plate (22), an electric push rod (31) is fixedly mounted on the third mounting plate (23), the electric push rod (31) is arranged on one side of the rotating cylinder (8) and the output end of the electric push rod (31) is directly opposite to one of the accommodating grooves (81) on the rotating cylinder (8), an L-shaped frame (32) is fixedly mounted on the output end of the electric push rod (31), and a discharge box (33) for loading neodymium iron boron magnets (2) is also fixedly mounted on the third mounting plate (23), and the opening of the discharge box (33) is arranged toward the opening of the L-shaped frame (32).

2. A permanent magnet motor assembly device according to claim 1, characterized in that: A plurality of push plates (71) are installed in a circumferential array at the bottom of the push frame (7), the number of the push plates (71) is the same as the number of the accommodating grooves (81), and the shape of the push plates (71) is adapted to the accommodating grooves (81).

3. A permanent magnet motor assembly device according to claim 1, characterized in that: When the first arc-shaped plate (11) moves to the bottom of the working frame (3), the center of the circle formed by the first arc-shaped plate (11) and the second arc-shaped plate (12) is coaxial with the center of the rotating cylinder (8), and the inner diameter of the circle formed by the first arc-shaped plate (11) and the second arc-shaped plate (12) is the same as the outer diameter of the motor rotor (1).

4. A permanent magnet motor assembly device according to claim 1, characterized in that: A first motor (41) is fixedly mounted on one end of the base (4), a threaded rod (42) is fixedly mounted on the output end of the first motor (41), one end of the threaded rod (42) is rotatably connected to the base (4), and the bottom of the sliding seat (5) is threadedly connected to the threaded rod (42).

5. The permanent magnet motor assembly device according to claim 1, characterized in that: The working frame (3) is provided with a feeding assembly (9) for circulating the neodymium iron boron magnet (2) into the rotating cylinder (8), and the feeding assembly (9) includes a gear ring (91), a rack (92), a gear (93), a ratchet (94) and a shifting rod (95), wherein the gear ring (91) is coaxially fixedly mounted on the upper part of the rotating cylinder (8), the rack (92) is slidably mounted on the bottom of the second mounting plate (22), and the upper part of the rack (92) is provided with a row of first teeth (96), and the lower part of the rack (92) is provided with a A row of second teeth (97), a rotating column (98) is coaxially fixedly mounted on the top of the gear (93), the rotating column (98) is rotatably mounted on the bottom of the second mounting plate (22), and one end of the first teeth (96) is meshed with the gear ring (91), and the second teeth (97) are meshed with the gear (93), the ratchet (94) is coaxially fixedly mounted on the lower part of the gear (93), the shifting rod (95) is fixedly mounted on the upper part of the L-shaped frame (32), and one end of the shifting rod (95) is provided with a one-way transmission member (10).

6. A permanent magnet motor assembly device according to claim 5, characterized in that: The one-way transmission member (10) comprises a fixed block (101) and a rotating block (102), wherein the fixed block (101) is fixedly mounted on a side of the shifting rod (95) close to the ratchet (94), and the rotating block (102) is rotatably mounted on the fixed block (101) via a rotating shaft, and a spiral spring (103) is connected between the rotating shaft of the rotating block (102) and the fixed block (101).

7. The permanent magnet motor assembly device according to claim 5, characterized in that: A plurality of elastic balls (104) are provided in a circumferential array on the side wall of the rotating column (98), the number of the elastic balls (104) being the same as the number of the accommodating grooves (81), and a plurality of grooves having the same number as the elastic balls (104) and capable of accommodating the elastic balls (104) are provided in an inner circumferential array of the second mounting plate (22).

8. The permanent magnet motor assembly device according to claim 1, characterized in that: A wedge-shaped plate (321) is slidably mounted at the opening of the L-shaped frame (32), and one side of the wedge-shaped plate (321) is connected to the L-shaped frame (32) via a return spring (322).

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