A magnetizing method and device for a permanent magnet rotor of a multi-pole motor

Abstract

The present invention discloses a magnetizing method and device for a permanent magnet rotor of a multi-pole motor. The magnetizing device includes a magnetizer, a placement seat and a baffle. A transmission seat is arranged on the inner wall of the bottom of the magnetizer, and a circular ring is rotatably connected to the top of the transmission seat, a rotating ring is integrally connected to the bottom of the circular ring, and a gear ring is arranged on the inner wall of the rotating ring. A gear rod is rotatably connected to the inner wall of the rotating ring through a bearing, and the gear rod and the gear ring are meshed with each other. An electric push rod is fixed on the outer wall of one side of the transmission seat by bolts, and a toothed plate is arranged on the output end of the electric push rod. The present invention has the beneficial effects that the electric push rod can drive the toothed plate to move, the toothed plate will mesh with the gear ring, so that the gear ring drives the rotating ring to rotate, and the rotating ring will drive the circular ring and the shielding plate to rotate, so that the shielding plate can block the non-target permanent magnetic pole surface of the permanent magnet rotor of the multi-stage motor, so that the magnetic state of the shielded permanent magnetic pole does not change, and the magnetizing coil can accurately magnetize the target permanent magnetic pole, and the magnetic field line distribution in the target magnetic pole area can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor magnetization, and in particular to a magnetization method and device for a permanent magnet rotor of a multi-pole motor. Background Art

[0002] Multi-pole motor refers to generator, electric machine, electric motor, and is an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. Electric motor is also called motor, which is represented by the letter "M" in the circuit. Its main function is to generate driving torque as a power source for electrical appliances or various machines. According to the working power supply, the motor can be divided into DC motor and AC motor according to the different working power supplies. Among them, AC motor is also divided into single-phase motor and three-phase motor. The magnetizing device is used to magnetize the permanent magnet rotor of the multi-pole motor.

[0003] A permanent magnet motor rotor magnetizing device and method with announcement number CN11534675B and announcement date 2023.03.31, includes: a magnetizing winding; the magnetizing winding is composed of multiple sub-windings connected in series along the circumferential direction, each sub-winding generates a pole pair magnetic field after being energized, and the end of the magnetizing winding is away from the inside in the circumferential direction; the magnetizing winding generates a magnetic field with multiple pole pairs after being energized, and the total number of pole pairs is the same as the total number of pole pairs of the permanent magnet motor rotor to be magnetized; a pulse current is passed into the magnetizing winding, so that the magnetizing winding generates an induced magnetic field exceeding the coercive force of the magnetic pole at each magnetic pole of the permanent magnet motor rotor, so as to magnetize each magnetic pole; wherein each sub-winding generates a pair of magnetic fields in opposite directions, and the adjacent magnetic fields corresponding to two adjacent sub-windings are in opposite directions, so as to achieve self-balancing of electromagnetic forces between multiple sub-windings, reduce the mechanical stress of the magnetizing winding, and ensure the magnetizing capacity of the magnetizing device.

[0004] As mentioned above and in the prior art, when magnetizing the permanent magnet rotor of a multi-pole motor, only each magnetic pole on the permanent magnet electronic rotor can be magnetized, and it is impossible to shield the non-target permanent magnet poles, which easily causes the magnetic state of the non-target permanent magnet poles to change, and thus the target permanent magnet poles cannot be accurately magnetized, and the energy conversion rate of the magnetization process is low. Therefore, it is urgent to design a magnetization method and device for the permanent magnet rotor of a multi-pole motor to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a magnetizing method and device for a permanent magnet rotor of a multi-pole motor, so as to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A magnetizing device for a permanent magnet rotor of a multi-pole motor comprises a magnetizer, a placement seat and a baffle, a transmission seat is arranged on the inner wall of the bottom of the magnetizer, and a circular ring is rotatably connected to the top of the transmission seat, a rotating ring is integrally connected to the bottom of the circular ring, and a gear ring is arranged on the inner wall of the rotating ring, a gear rod is rotatably connected to the inner wall of the rotating ring through a bearing, and the gear rod and the gear ring are meshed with each other, an electric push rod is fixed to the outer wall of one side of the transmission seat by bolts, a toothed plate is arranged on the output end of the electric push rod, and the toothed plate and the gear rod are meshed with each other, a plurality of shielding plates are arranged on the outer wall of the top of the circular ring, and the plurality of shielding plates are distributed in an equidistant structure, a magnetizing coil is arranged on the outer wall of the top of the transmission seat, and the shielding plate is located inside the magnetizing coil, and the placement seat is provided with a plurality of shielding plates, and the plurality of shielding plates are provided with shielding plates. The inner wall of the bottom of the seat is rotatably connected with a rotating cylinder through a bearing, and a rotating gear sleeve is provided on the outer wall of the rotating cylinder, an extrusion block is integrally connected to the inner wall of the rotating cylinder, a clamping block is slidably connected to the inside of the placement seat, and an anti-slip pad is provided on the outer wall of one side of the clamping block, the extrusion block and the clamping block are abutted against each other, anti-slip plates are provided on the outer walls on both sides of the clamping block, and an anti-slip rod is provided on the inner wall of the placement seat close to the clamping block, the anti-slip plate is slidably sleeved on the outside of the anti-slip rod, a spring connected with the anti-slip plate is provided on the inner wall of the placement seat, and the spring is sleeved on the outside of the anti-slip rod, a rotating motor is fixed to the inner wall of the bottom of the placement seat by bolts, and a rotating gear is provided on the output shaft of the rotating motor, and the rotating gear and the rotating gear sleeve are meshed with each other.

[0008] Furthermore, a lifting cylinder is provided on the outer wall of the bottom of the placement seat, a screw rod 1 is rotatably connected to the inner wall of the bottom of the magnetizer through a bearing, and the lifting cylinder is threadedly sleeved on the outside of the screw rod 1, and a placement opening is opened on the top of the magnetizer.

[0009] Furthermore, a guide cylinder is arranged on the outer wall of the bottom of the placement seat, a guide rod is arranged on the inner wall of the bottom of the magnetizer, and the guide cylinder is slidably sleeved on the outside of the guide rod.

[0010] Furthermore, the bottom of the magnetizer is rotatably connected to a long rod 1 via a bearing, and the inner wall of one side of the magnetizer is rotatably connected to a long rod 2 via a bearing, the inner wall of one side of the magnetizer is rotatably connected to a screw rod 2 via a bearing, and the outer walls of the screw rod 1, the screw rod 2, the long rod 1 and the long rod 2 are all provided with bevel gears, and two adjacent bevel gears are meshed with each other.

[0011] Furthermore, the baffle is threadedly sleeved on the outside of the second screw rod, guide plates are provided on the outer walls on both sides of the baffle, and guide grooves are opened on the inner walls on both sides of the magnetizer, and the guide plates are slidably connected inside the guide grooves.

[0012] Furthermore, a transmission motor is fixed to the inner wall of one side of the magnetizer by bolts, and a driving gear is arranged on the output shaft of the transmission motor, a driven gear sleeve is arranged on the outer wall of the second long rod, and the driving gear and the driven gear sleeve are meshed with each other.

[0013] Furthermore, a cooling seat is arranged on the inner wall of the magnetizer, and a cooling pipe is arranged on the inner wall of the cooling seat, and the cooling pipe is distributed on the inner wall of the cooling seat in an S-shaped structure.

[0014] Furthermore, a refrigeration box is fixed to the outer wall of one side of the magnetizer by bolts, and both ends of the cooling pipe are connected to the refrigeration box. A fan is fixed to the inner wall of the refrigeration box by bolts, and the fan is connected to the top of the cooling pipe.

[0015] Furthermore, a semiconductor refrigeration plate is arranged on the outer wall of one side of the refrigeration box, and the cold end of the semiconductor refrigeration plate faces the interior of the refrigeration box, a partition is arranged on the inner wall of the refrigeration box, and an air inlet net and an air outlet net are respectively arranged on the outer walls of the top and bottom of the refrigeration box.

[0016] A magnetizing method for a permanent magnet rotor magnetizing device of a multi-pole motor comprises the following steps:

[0017] S1, turn on the transmission motor to drive the driving gear to rotate and mesh with the driven gear sleeve to make the driven gear sleeve rotate, the driven gear sleeve will drive the long rod 2 to rotate, the bevel gear on the long rod 2 will mesh with the adjacent screw rod 2 and the bevel gear on the long rod 1, so that the screw rod 2 and the long rod 1 can rotate at the same time, the screw rod 2 will be threaded with the baffle plate, so that the baffle plate can be moved to leak the placement port, the bevel gear on the long rod 1 will mesh with the bevel gear on the screw rod 1, so that the screw rod 1 can rotate with the lifting cylinder thread, so that the lifting cylinder can drive the placement seat to rise and fall, and the placement seat will rise to the placement port while the placement port is opened, and the multi-stage motor permanent magnet rotor is inserted into the placement seat, and the rotating motor is started to drive the rotating gear to rotate and mesh with the rotating gear sleeve, so that the rotating gear sleeve can drive the extrusion block to rotate and squeeze the clamping block, so that the clamping block can move to clamp and fix the central axis of the multi-stage motor permanent magnet rotor;

[0018] S2, then the transmission direction of step S1 is reversed, and the placement seat can be lowered to the top of the transmission seat, and the baffle plate will also cover the placement opening;

[0019] S3, turn on the electric push rod to drive the toothed plate to move, the toothed plate will mesh with the gear ring, so that the gear ring drives the rotating ring to rotate, and the rotating ring drives the circular ring and the shielding plate to rotate, so that the shielding plate is shielded on the non-target permanent magnetic pole surface of the permanent magnetic rotor of the multi-stage motor;

[0020] S4, turn on the magnetizing coil to magnetize the permanent magnet rotor of the multi-stage motor;

[0021] S5. During magnetization, the magnetization coil generates heat, the semiconductor refrigeration sheet is turned on, and the cold end of the semiconductor refrigeration sheet is facing the inside of the refrigerator. When the fan is exhausted, the air outside the refrigerator enters the inside of the refrigerator through the air inlet net, and the cold end of the semiconductor refrigeration sheet cools the air. The fan draws the cold air into the cooling pipe to flow inside the cooling pipe, which can exchange heat with the heat inside the magnetizer. The hot air after heat exchange returns to the bottom of the refrigerator through the bottom end of the cooling pipe. The lower half of the semiconductor refrigeration sheet can cool the reflux hot air, and the cooled air is discharged to the outside of the refrigerator.

[0022] S6. After the magnetization is completed, repeat the steps in S1 above, raise the placement seat and the multi-stage motor permanent magnet rotor to the placement port, and take out the magnetized multi-stage motor permanent magnet rotor.

[0023] In the above technical scheme, the present invention provides a magnetizing method and device for a permanent magnet rotor of a multi-pole motor, (1) by setting a circular ring, a rotating ring, a gear ring, a gear rod, an electric push rod, a gear plate and a shielding plate, the electric push rod can drive the gear plate to move, the gear plate will mesh with the gear ring, so that the gear ring drives the rotating ring to rotate, and the rotating ring drives the circular ring and the shielding plate to rotate, so that the shielding plate can block the surface of the non-target permanent magnet pole of the permanent magnet rotor of the multi-pole motor, so that the magnetic state of the shielded permanent magnet pole does not change, and the magnetizing coil can accurately magnetize the target permanent magnet pole, which can improve the distribution of magnetic lines of force in the target pole area, increase the magnetic field strength of the target pole area in the magnetizing direction, and further improve the energy of the magnetizing process. quantity conversion rate; (2) by setting the rotating cylinder, rotating gear sleeve, clamping block, anti-slip pad, extrusion block, anti-slip plate, anti-slip rod, spring, rotating motor and rotating gear, when the rotating motor drives the rotating gear to rotate and engage with the rotating gear sleeve, the rotating gear sleeve can drive the extrusion block to rotate and squeeze the clamping block, so that the clamping block can move to clamp and fix the central axis of the multi-stage motor permanent magnet rotor, and can prevent the multi-stage motor permanent magnet rotor from shaking and tipping when the placement seat drives the multi-stage motor permanent magnet rotor to rise and fall, thereby improving the stability performance, and the anti-slip rod can guide the clamping block when it moves; (3) by setting the placement seat, lifting cylinder, screw rod 1, guide cylinder, guide rod, long rod 1, long rod 2, Screw rod 2, bevel gear, baffle, guide groove, guide plate, transmission motor, active gear, driven gear sleeve and placement port. The transmission motor drives the active gear to rotate and mesh with the driven gear sleeve to rotate the driven gear sleeve, and the driven gear sleeve will drive the long rod 2 to rotate. The bevel gear on the long rod 2 will mesh with the adjacent screw rod 2 and the bevel gear on the long rod 1, so that screw rod 2 and long rod 1 can rotate at the same time. Screw rod 2 will be threaded with the baffle, so that the baffle can move to leak the placement port. When the long rod 1 rotates, the bevel gear above it will mesh with the bevel gear on the screw rod 1, so that screw rod 1 can rotate and thread with the lifting cylinder, so that the lifting cylinder will drive the placement seat to rise and fall. When the placement port is opened, the placement seat will rise to the placement port. It is convenient to place the permanent magnet rotor of the multi-stage motor on or take it out from the placement seat; (4) through the cooling seat, cooling pipe, refrigeration box, semiconductor refrigeration plate, air inlet net, air outlet net, partition and fan, the magnetization coil will generate heat during magnetization. When the semiconductor refrigeration plate is turned on and the fan is exhausted, the air outside the refrigeration box enters the inside of the refrigeration box through the air inlet net. The cold end of the semiconductor refrigeration plate cools the air. The fan draws the cold air into the cooling pipe for internal flow, which can exchange heat with the heat inside the magnetizer. The hot air after heat exchange returns to the bottom of the refrigeration box through the bottom of the cooling pipe for cooling and then discharged, thereby realizing the function of heat dissipation and temperature reduction of the magnetization coil and preventing the sprint coil from burning out;(5) The partition can separate the refrigeration box into upper and lower parts. The cold air after refrigeration in the upper part enters the cooling pipe for heat exchange, and the heat from the lower part does not enter the upper part of the refrigeration box, so that one semiconductor refrigeration plate can realize the refrigeration of the upper and lower parts. Therefore, it can save more resources when the magnetizing device is used, and the overall cost of the magnetizing device can be reduced when the magnetizing device is produced. ; BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0025] Figure 1 A three-dimensional structural schematic diagram is provided for an embodiment of a magnetizing method and device for a permanent magnet rotor of a multi-pole motor according to the present invention.

[0026] Figure 2 The present invention provides a front view schematic diagram of the internal structure of a magnetizing method and device embodiment of a multi-pole motor permanent magnet rotor.

[0027] Figure 3 The present invention provides a schematic diagram of the internal side structure of a magnetizing method and device embodiment of a multi-pole motor permanent magnet rotor.

[0028] Figure 4 A schematic diagram of a rotating ring structure provided in an embodiment of a magnetizing method and device for a permanent magnet rotor of a multi-pole motor of the present invention.

[0029] Figure 5 A schematic diagram of a top view of a circular ring structure provided in an embodiment of a magnetizing method and device for a permanent magnet rotor of a multi-pole motor according to the present invention.

[0030] Figure 6 A schematic diagram of the internal structure of a refrigeration box provided in an embodiment of a magnetizing method and device for a permanent magnet rotor of a multi-pole motor of the present invention.

[0031] Figure 7 A schematic diagram of the internal top view of a placement seat provided in an embodiment of a magnetizing method and device for a permanent magnet rotor of a multi-pole motor according to the present invention.

[0032] Description of reference numerals:

[0033] 1. Magnetizer; 2. Transmission seat; 3. Ring; 4. Rotating ring; 5. Gear ring; 6. Gear rod; 7. Electric push rod; 8. Gear plate; 9. Shielding plate; 10. Magnetizing coil; 11. Placement seat; 12. Lifting cylinder; 13. Screw rod 1; 14. Guide cylinder; 15. Guide rod; 16. Long rod 1; 17. Long rod 2; 18. Screw rod 2; 19. Conical gear; 20. Baffle; 21. Guide groove; 22. Guide plate; 23. Transmission motor; 2 4. Driving gear; 25. Driven gear sleeve; 26. Cooling seat; 27. Cooling pipe; 28. Refrigeration box; 29. ​​Semiconductor refrigeration plate; 30. Air inlet net; 31. Air outlet net; 32. Partition; 33. Fan; 34. Placement port; 35. Rotary cylinder; 36. Rotating gear sleeve; 37. Clamping block; 38. Anti-slip pad; 39. Extrusion block; 40. Anti-slip plate; 41. Anti-slip rod; 42. Spring; 43. Rotating motor; 44. Rotating gear. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] like Figure 1-7 As shown, a magnetizing device for a permanent magnet rotor of a multi-pole motor provided by an embodiment of the present invention comprises a magnetizer 1, a placement seat 11 and a baffle 20, a transmission seat 2 is arranged on the inner wall at the bottom of the magnetizer 1, and a circular ring 3 is rotatably connected to the top of the transmission seat 2, a rotating ring 4 is integrally connected to the bottom of the circular ring 3, and a gear ring 5 is arranged on the inner wall of the rotating ring 4, a gear rod 6 is rotatably connected to the inner wall of the bottom of the magnetizer 1 through a bearing, and the gear rod 6 and the gear ring 5 are meshed with each other, an electric push rod 7 is fixed to the outer wall of one side of the transmission seat 2 by bolts, a toothed plate 8 is arranged on the output end of the electric push rod 7, and the toothed plate 8 and the gear rod 6 are meshed with each other, a plurality of shielding plates 9 are arranged on the outer wall of the top of the circular ring 3, and the plurality of shielding plates 9 are distributed in an equidistant structure, a magnetizing coil 10 is arranged on the outer wall of the top of the transmission seat 2, and the shielding plate 9 is located inside the magnetizing coil 10, and a plurality of shielding plates 9 are arranged on the inner wall of the bottom of the placement seat 11. A rotating cylinder 35 is rotatably connected through a bearing, and a rotating gear sleeve 36 is provided on the outer wall of the rotating cylinder 35, an extrusion block 39 is integrally connected to the inner wall of the rotating cylinder 35, a clamping block 37 is slidably connected to the inside of the placement seat 11, and an anti-slip pad 38 is provided on the outer wall on one side of the clamping block 37, the extrusion block 39 and the clamping block 37 abut against each other, anti-slip plates 40 are provided on the outer walls on both sides of the clamping block 37, and an anti-slip rod 41 is provided on the inner wall of the placement seat 11 close to the clamping block 37, the anti-slip plate 40 is slidably sleeved on the outside of the anti-slip rod 41, a spring 42 connected to the anti-slip plate 40 is provided on the inner wall of the placement seat 11, and the spring 42 is sleeved on the outside of the anti-slip rod 41, a rotating motor 43 is fixed to the inner wall of the bottom of the placement seat 11 by bolts, and a rotating gear 44 is provided on the output shaft of the rotating motor 43, and the rotating gear 44 is meshed with the rotating gear sleeve 36.

[0036] The present invention provides a magnetizing device for a permanent magnet rotor of a multi-pole motor, comprising a magnetizer 1, a placement seat 11 and a baffle 20. A transmission seat 2 is arranged on the inner wall of the bottom of the magnetizer 1, and a circular ring 3 is rotatably connected to the top of the transmission seat 2. A rotating ring 4 is integrally connected to the bottom of the circular ring 3, and a gear ring 5 is arranged on the inner wall of the rotating ring 4. A gear rod 6 is rotatably connected to the inner wall of the bottom of the magnetizer 1 through a bearing, and the gear rod 6 and the gear ring 5 are meshed with each other. An electric push rod 7 is fixed to the outer wall of one side of the transmission seat 2 by bolts, and a toothed plate 8 is arranged on the output end of the electric push rod 7, and the toothed plate 8 and the gear rod 6 are meshed with each other. A plurality of shielding plates 9 are arranged on the outer wall of the top of the circular ring 3, and a plurality of shielding plates 9 are arranged on the outer wall of the top of the circular ring 3. The shielding plates 9 are distributed in an equidistant structure. A magnetizing coil 10 is arranged on the outer wall at the top of the transmission seat 2, and the shielding plate 9 is located inside the magnetizing coil 10. The electric push rod 7 drives the tooth plate 8 to move and engage with the gear ring 5, so that the gear ring 5 can drive the rotating ring 4 to rotate, and the rotating ring 4 will drive the ring 3 and the shielding plate 9 to rotate, so that the shielding plate 9 is blocked on the surface of the non-target permanent magnetic pole of the permanent magnetic rotor of the multi-stage motor, so that the magnetic state of the shielded permanent magnetic pole does not change, and the magnetizing coil 10 can achieve accurate magnetization of the target permanent magnetic pole, which can improve the distribution of magnetic lines of force in the target magnetic pole area, increase the magnetic field strength of the target magnetic pole area in the magnetization direction, and further improve the magnetization process. Energy conversion rate, a rotary cylinder 35 is rotatably connected to the inner wall of the bottom of the placement seat 11 through a bearing, and a rotating gear sleeve 36 is provided on the outer wall of the rotary cylinder 35, and an extrusion block 39 is integrally connected to the inner wall of the rotary cylinder 35, and a clamping block 37 is slidably connected to the inside of the placement seat 11, and an anti-slip pad 38 is provided on the outer wall of one side of the clamping block 37, and the extrusion block 39 and the clamping block 37 are abutted against each other, and anti-slip plates 40 are provided on the outer walls on both sides of the clamping block 37, and an anti-slip rod 41 is provided on the inner wall of the placement seat 11 close to the clamping block 37, and the anti-slip plate 40 is slidably sleeved on the outside of the anti-slip rod 41, and a spring connected to the anti-slip plate 40 is provided on the inner wall of the placement seat 11 42, and the spring 42 is sleeved on the outside of the anti-dropout rod 41, a rotating motor 43 is fixed to the inner wall of the bottom of the placement seat 11 by bolts, and a rotating gear 44 is arranged on the output shaft of the rotating motor 43, the rotating gear 44 is meshed with the rotating gear sleeve 36, when the rotating motor 43 drives the rotating gear 44 to rotate and mesh with the rotating gear sleeve 36, the rotating gear sleeve 36 can drive the extrusion block 39 to rotate and squeeze the clamping block 37, the clamping block 37 can be moved to clamp and fix the central axis of the multi-stage motor permanent magnet rotor, and the multi-stage motor permanent magnet rotor can be prevented from shaking and tipping over when the placement seat 11 drives the multi-stage motor permanent magnet rotor to rise and fall, thereby improving the stability performance.

[0037] In one embodiment provided by the present invention, a lifting cylinder 12 is provided on the outer wall of the bottom of the placement seat 11, a screw rod 13 is rotatably connected to the inner wall of the bottom of the magnetizer 1 through a bearing, and the lifting cylinder 12 is threadedly sleeved on the outside of the screw rod 13, and a placement opening 34 is opened on the top of the magnetizer 1, and the placement opening 34 is used to take and place the permanent magnet rotor of the multi-stage motor.

[0038] In another embodiment provided by the present invention, a guide cylinder 14 is provided on the outer wall of the bottom of the placement seat 11, a guide rod 15 is provided on the inner wall of the bottom of the magnetizer 1, and the guide cylinder 14 is slidably sleeved on the outside of the guide rod 15, which can guide the placement seat 11 when it is raised or lowered.

[0039] In another embodiment provided by the present invention, the bottom of the magnetizer 1 is rotatably connected to a long rod 16 via a bearing, and the inner wall of one side of the magnetizer 1 is rotatably connected to a long rod 2 17 via a bearing, and the inner wall of one side of the magnetizer 1 is rotatably connected to a screw rod 2 18 via a bearing, and the outer walls of the screw rod 13, the screw rod 2 18, the long rod 16 and the long rod 2 17 are all provided with bevel gears 19, and two adjacent bevel gears 19 are meshed with each other. When the long rod 2 17 rotates, the bevel gear 19 on the long rod 2 17 can mesh with the bevel gears 19 on the screw rod 2 18 and the long rod 16, so that the screw rod 2 18 and the long rod 16 can rotate.

[0040] In an embodiment provided by the present invention, the baffle 20 is threadedly sleeved on the outside of the screw rod 18, guide plates 22 are provided on the outer walls on both sides of the baffle 20, and guide grooves 21 are opened on the inner walls on both sides of the magnetizer 1, and the guide plates 22 are slidably connected to the inside of the guide grooves 21, and the guide plates 22 can support and guide the baffle 20.

[0041] In another embodiment provided by the present invention, a transmission motor 23 is fixed to the inner wall of one side of the magnetizer 1 by bolts, and a driving gear 24 is provided on the output shaft of the transmission motor 23, a driven gear sleeve 25 is provided on the outer wall of the long rod 17, and the driving gear 24 and the driven gear sleeve 25 are meshed with each other, so that the driven gear sleeve 25 can drive the long rod 17 to rotate.

[0042] In another embodiment provided by the present invention, a cooling seat 26 is provided on the inner wall of the magnetizer 1, and a cooling pipe 27 is provided on the inner wall of the cooling seat 26. The cooling pipe 27 is distributed on the inner wall of the cooling seat 26 in an S-shaped structure. The cooling pipe 27 with the S-shaped structure can make the cold air exchange heat inside the cooling seat 26 for a longer time.

[0043] In one embodiment provided by the present invention, a refrigeration box 28 is fixed to the outer wall of one side of the magnetizer 1 by bolts, and both ends of the cooling pipe 27 are connected to the refrigeration box 28, a fan 33 is fixed to the inner wall of the refrigeration box 28 by bolts, and the fan 33 is connected to the top of the cooling pipe 27, and the fan 33 can draw the cold air cooled by the semiconductor refrigeration plate 29 into the interior of the cooling pipe 27 for circulation.

[0044] In another embodiment provided by the present invention, a semiconductor refrigeration plate 29 is arranged on the outer wall of one side of the refrigeration box 28, and the cold end of the semiconductor refrigeration plate 29 faces the interior of the refrigeration box 28, a partition 32 is arranged on the inner wall of the refrigeration box 28, and an air inlet net 30 and an air outlet net 31 are respectively arranged on the outer walls of the top and bottom of the refrigeration box 28, and the partition 32 can prevent the hot air after heat exchange from the bottom end of the cooling pipe 27 from entering the upper part of the refrigeration box 28.

[0045] A magnetizing method for a permanent magnet rotor magnetizing device of a multi-pole motor comprises the following steps:

[0046] S1. Turn on the transmission motor 23 to drive the driving gear 24 to rotate and mesh with the driven gear sleeve 25 to rotate the driven gear sleeve 25. The driven gear sleeve 25 will drive the long rod 17 to rotate. The bevel gear 19 on the long rod 17 will mesh with the adjacent screw rod 18 and the bevel gear 19 on the long rod 16, so that the screw rod 18 and the long rod 16 can rotate at the same time. The screw rod 18 will be threaded with the baffle 20, so that the baffle 20 can move to leak the placement port 34. The bevel gear 19 on the long rod 16 will mesh with the bevel gear on the screw rod 13. The wheel 19 is meshed, which can make the screw rod 13 rotate and thread with the lifting cylinder 12, so that the lifting cylinder 12 can drive the placement seat 11 to rise and fall, and the placement opening 34 is opened while the placement seat 11 rises to the placement opening 34, and the multi-stage motor permanent magnet rotor is inserted into the placement seat 11, and the rotating motor 43 is started to drive the rotating gear 44 to rotate and mesh with the rotating gear sleeve 36, so that the rotating gear sleeve 36 can drive the extrusion block 39 to rotate and squeeze the clamping block 37, so that the clamping block 37 can move to clamp and fix the central axis of the multi-stage motor permanent magnet rotor;

[0047] S2, then the transmission direction of step S1 is reversed, and the placement seat 11 can be lowered to the top of the transmission seat 2, and the baffle 20 will also cover the placement opening 34;

[0048] S3, turn on the electric push rod 7 to drive the tooth plate 8 to move, the tooth plate 8 will mesh with the gear ring 5, so that the gear ring 5 drives the rotating ring 4 to rotate, and the rotating ring 4 drives the ring 3 and the shielding plate 9 to rotate, so that the shielding plate 9 is shielded on the non-target permanent magnetic pole surface of the permanent magnet rotor of the multi-stage motor;

[0049] S4, turning on the magnetizing coil 10 to magnetize the permanent magnet rotor of the multi-stage motor;

[0050] S5. During magnetization, the magnetization coil 10 generates heat, the semiconductor refrigeration sheet 29 is turned on, and the cold end of the semiconductor refrigeration sheet 29 faces the inside of the refrigeration box 28. When the fan 33 draws air, the air outside the refrigeration box 28 enters the inside of the refrigeration box 28 through the air inlet net 30. The cold end of the semiconductor refrigeration sheet 29 cools the air. The fan 33 draws the cold air into the inside of the cooling pipe 27 for flow, and can exchange heat with the heat inside the magnetizer 1. The hot air after heat exchange returns to the bottom of the refrigeration box 28 through the bottom end of the cooling pipe 27. The lower half of the semiconductor refrigeration sheet 29 can cool the refrigerated hot air, and the cooled air is discharged to the outside of the refrigeration box 28.

[0051] S6. After the magnetization is completed, repeat the steps in S1 above, raise the placement seat 11 and the multi-stage motor permanent magnet rotor to the placement opening 34, and take out the magnetized multi-stage motor permanent magnet rotor.

[0052] Working principle: S1. Turn on the transmission motor 23 to drive the driving gear 24 to rotate and mesh with the driven gear sleeve 25 to rotate the driven gear sleeve 25. The driven gear sleeve 25 will drive the long rod 2 17 to rotate. The bevel gear 19 on the long rod 2 17 will mesh with the adjacent screw rod 2 18 and the bevel gear 19 on the long rod 1 16, so that the screw rod 2 18 and the long rod 1 16 can rotate at the same time. The screw rod 2 18 will be threaded with the baffle 20, so that the baffle 20 can move to leak the placement port 34. The bevel gear 19 on the long rod 16 will mesh with the bevel gear 19 on the screw rod 13, so that the screw rod 13 can rotate and the lifting cylinder 12 threads, so that the lifting cylinder 12 will drive the placement seat 11 to rise and fall, and the placement port 34 will rise to the placement port 34 when it is opened, and the multi-stage motor permanent magnet rotor will be inserted into the placement seat 11, and the rotating motor 43 will be started to drive the rotating gear 44 to rotate and mesh with the rotating gear sleeve 36, so that the rotating gear sleeve 36 can drive the extrusion block 39 to rotate and squeeze the clamping block 37, so that the clamping block 37 can move to clamp and fix the central axis of the multi-stage motor permanent magnet rotor; S2, then the transmission direction of step S1 is reversed, and the placement seat 11 can be lowered to the top of the transmission seat 2, at this time the baffle 2 0 will also block the placement opening 34; S3, turn on the electric push rod 7 to drive the tooth plate 8 to move, the tooth plate 8 will mesh with the gear ring 5, so that the gear ring 5 drives the rotating ring 4 to rotate, and the rotating ring 4 will drive the ring 3 and the shielding plate 9 to rotate, so that the shielding plate 9 is blocked on the non-target permanent magnetic pole surface of the permanent magnet rotor of the multi-stage motor; S4, turn on the magnetizing coil 10 to magnetize the permanent magnet rotor of the multi-stage motor; S5, during the magnetization, the magnetizing coil 10 will generate heat, turn on the semiconductor refrigeration plate 29, and the cold end of the semiconductor refrigeration plate 29 is facing the inside of the refrigeration box 28. When the fan 33 exhausts air, the air outside the refrigeration box 28 passes through the air inlet net 30 After entering the interior of the refrigeration box 28, the cold end of the semiconductor refrigeration plate 29 cools the air, and the fan 33 draws the cold air into the interior of the cooling pipe 27 for flow, and can exchange heat with the heat inside the magnetizer 1. The hot air after heat exchange returns to the bottom of the refrigeration box 28 through the bottom end of the cooling pipe 27. The lower half of the semiconductor refrigeration plate 29 can cool the refrigerated hot air, and the cooled air is passed to the outside of the refrigeration box 28; S6. After the magnetization is completed, repeat the steps in S1 above, raise the placement seat 11 and the multi-stage motor permanent magnet rotor to the placement port 34, and take out the magnetized multi-stage motor permanent magnet rotor.

[0053] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A magnetizing device for a permanent magnet rotor of a multi-pole motor, comprising a magnetizer (1), a placement seat (11) and a baffle (20), characterized in that: A transmission seat (2) is arranged on the inner wall of the bottom of the magnetizer (1), and a circular ring (3) is rotatably connected to the top of the transmission seat (2), a rotating ring (4) is integrally connected to the bottom of the circular ring (3), and a gear ring (5) is arranged on the inner wall of the rotating ring (4), a gear rod (6) is rotatably connected to the inner wall of the bottom of the magnetizer (1) via a bearing, and the gear rod (6) and the gear ring (5) are meshed with each other, and an electric push rod (7) is fixed to the outer wall of one side of the transmission seat (2) via bolts, and the electric push rod (7) A toothed plate (8) is provided on the output end of the drive seat (7), and the toothed plate (8) and the toothed rod (6) are meshed with each other; a plurality of shielding plates (9) are provided on the outer wall of the top of the ring (3), and the plurality of shielding plates (9) are distributed in an equidistant structure; a magnetizing coil (10) is provided on the outer wall of the top of the transmission seat (2), and the shielding plate (9) is located inside the magnetizing coil (10); a rotating cylinder (35) is rotatably connected to the inner wall of the bottom of the placement seat (11) via a bearing, and the outer wall of the rotating cylinder (35) is A rotating gear sleeve (36) is arranged on the wall, an extrusion block (39) is integrally connected to the inner wall of the rotating cylinder (35), a clamping block (37) is slidably connected to the interior of the placement seat (11), and an anti-slip pad (38) is arranged on the outer wall of one side of the clamping block (37), the extrusion block (39) and the clamping block (37) are mutually abutted, anti-slip plates (40) are arranged on the outer walls of both sides of the clamping block (37), and an anti-slip rod (40) is arranged on the inner wall of the placement seat (11) close to the clamping block (37). 41), the anti-slip plate (40) is slidably sleeved on the outside of the anti-slip rod (41), a spring (42) connected to the anti-slip plate (40) is provided on the inner wall of the placement seat (11), and the spring (42) is sleeved on the outside of the anti-slip rod (41), a rotating motor (43) is fixed to the inner wall of the bottom of the placement seat (11) by bolts, and a rotating gear (44) is provided on the output shaft of the rotating motor (43), and the rotating gear (44) and the rotating gear sleeve (36) are meshed with each other; A lifting cylinder (12) is provided on the outer wall of the bottom of the placement seat (11); a screw rod (13) is rotatably connected to the inner wall of the bottom of the magnetizer (1) via a bearing, and the lifting cylinder (12) is threadedly sleeved on the outside of the screw rod (13); and a placement opening (34) is provided on the top of the magnetizer (1); A guide cylinder (14) is provided on the outer wall of the bottom of the placement seat (11), a guide rod (15) is provided on the inner wall of the bottom of the magnetizer (1), and the guide cylinder (14) is slidably sleeved on the outside of the guide rod (15).

2. The magnetizing device for a permanent magnet rotor of a multi-pole motor according to claim 1, characterized in that: The bottom of the magnetizer (1) is rotatably connected to a long rod (16) via a bearing, and the inner wall of one side of the magnetizer (1) is rotatably connected to a long rod (17) via a bearing, and the inner wall of one side of the magnetizer (1) is rotatably connected to a screw rod (18) via a bearing, and the outer walls of the screw rod (13), the screw rod (18), the long rod (16) and the long rod (17) are all provided with bevel gears (19), and two adjacent bevel gears (19) are meshed with each other.

3. The magnetizing device for a permanent magnet rotor of a multi-pole motor according to claim 2, characterized in that: The baffle (20) is threadedly sleeved on the outside of the second screw rod (18), guide plates (22) are provided on the outer walls on both sides of the baffle (20), and guide grooves (21) are provided on the inner walls on both sides of the magnetizer (1), and the guide plates (22) are slidably connected to the inside of the guide grooves (21).

4. The magnetizing device for a permanent magnet rotor of a multi-pole motor according to claim 3, characterized in that: A transmission motor (23) is fixed to the inner wall of one side of the magnetizer (1) by bolts, and a driving gear (24) is arranged on the output shaft of the transmission motor (23). A driven gear sleeve (25) is arranged on the outer wall of the second long rod (17), and the driving gear (24) and the driven gear sleeve (25) are meshed with each other.

5. The magnetizing device for a permanent magnet rotor of a multi-pole motor according to claim 4, characterized in that: A cooling seat (26) is arranged on the inner wall of the magnetizer (1), and a cooling pipe (27) is arranged on the inner wall of the cooling seat (26); the cooling pipe (27) is distributed on the inner wall of the cooling seat (26) in an S-shaped structure.

6. The magnetizing device for a permanent magnet rotor of a multi-pole motor according to claim 5, characterized in that: A refrigeration box (28) is fixed to the outer wall of one side of the magnetizer (1) by means of bolts, and both ends of the cooling pipe (27) are connected to the refrigeration box (28); a fan (33) is fixed to the inner wall of the refrigeration box (28) by means of bolts, and the fan (33) is connected to the top end of the cooling pipe (27).

7. The magnetizing device for a permanent magnet rotor of a multi-pole motor according to claim 6, characterized in that: A semiconductor refrigeration sheet (29) is provided on an outer wall of one side of the refrigeration box (28), and a cold end of the semiconductor refrigeration sheet (29) faces the interior of the refrigeration box (28); a partition (32) is provided on an inner wall of the refrigeration box (28); and an air inlet net (30) and an air outlet net (31) are respectively provided on the outer walls of the top and bottom of the refrigeration box (28).

8. A magnetizing method for a magnetizing device of a permanent magnet rotor of a multi-pole motor according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Turn on the transmission motor (23) to drive the driving gear (24) to rotate and mesh with the driven gear sleeve (25) to rotate the driven gear sleeve (25). The driven gear sleeve (25) will drive the second long rod (17) to rotate. The bevel gear (19) on the second long rod (17) will mesh with the adjacent second screw rod (18) and the bevel gear (19) on the first long rod (16), so that the second screw rod (18) and the first long rod (16) can rotate simultaneously. The second screw rod (18) will be threaded with the baffle (20), so that the baffle (20) can move to leak the placement port (34). The bevel gear (19) on the first long rod (16) will be threaded with the screw rod (13). The bevel gear (19) is meshed with the screw rod (13) so that the screw rod (13) rotates and engages with the thread of the lifting cylinder (12), so that the lifting cylinder (12) drives the placement seat (11) to rise and fall, and when the placement opening (34) is opened, the placement seat (11) rises to the placement opening (34), and the multi-stage motor permanent magnet rotor is inserted into the placement seat (11), and the rotating motor (43) is started to drive the rotating gear (44) to rotate and engage with the rotating gear sleeve (36), so that the rotating gear sleeve (36) drives the extrusion block (39) to rotate and squeeze the clamping block (37), so that the clamping block (37) can move to clamp and fix the central axis of the multi-stage motor permanent magnet rotor; S2, then the transmission direction of step S1 is reversed, and the placement seat (11) can be lowered to the top of the transmission seat (2), and the baffle (20) will also cover the placement opening (34); S3, turning on the electric push rod (7) to drive the toothed plate (8) to move, the toothed plate (8) will mesh with the gear ring (5), so that the gear ring (5) drives the rotating ring (4) to rotate, and the rotating ring (4) drives the circular ring (3) and the shielding plate (9) to rotate, so that the shielding plate (9) is shielded on the non-target permanent magnetic pole surface of the permanent magnetic rotor of the multi-stage motor; S4, turning on the magnetizing coil (10) to magnetize the permanent magnet rotor of the multi-stage motor; S5, during the magnetization period, the magnetization coil (10) generates heat, the semiconductor refrigeration sheet (29) is turned on, and the cold end of the semiconductor refrigeration sheet (29) faces the inside of the refrigeration box (28). When the fan (33) draws air, the air outside the refrigeration box (28) enters the inside of the refrigeration box (28) through the air inlet net (30), and the cold end of the semiconductor refrigeration sheet (29) cools the air. The fan (33) draws the cold air into the inside of the cooling pipe (27) for flow, and can exchange heat with the heat inside the magnetizer (1). The hot air after heat exchange returns to the bottom of the refrigeration box (28) through the bottom end of the cooling pipe (27). The lower half of the semiconductor refrigeration sheet (29) can cool the refrigeration hot air, and the cooled air is discharged to the outside of the refrigeration box (28); S6. After the magnetization is completed, repeat the steps in S1 above, raise the placement seat (11) and the multi-stage motor permanent magnet rotor to the placement opening (34), and take out the magnetized multi-stage motor permanent magnet rotor.

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