A brushless motor rotor magnetizing device and method

Abstract

The application discloses a brushless motor rotor magnetizing device and method, and relates to the technical field of motor magnetizing, which comprises a base, a motor lift rod is fixedly connected to the top of the base, a lifting plate is fixedly connected to the top end of the motor lift rod, a magnetizer is arranged at the bottom of the lifting plate, a motor rotor is arranged below the magnetizer, and a magnetizing clamping mechanism is arranged at the top of the base; the magnetizing clamping mechanism is arranged, the spring elastic force tightly clamps the telescopic articulated rod, the articulated block A and the sliding clamping block in the clamping groove, and the motor rotor inner wall is tightly squeezed through the extrusion force, the automatic clamping of the motor rotor is completed, the problem of uneven magnetization caused by the fact that the position of the motor rotor is not fixed when the magnetizer is pressed and electrified is avoided, and the magnetizing efficiency of the motor rotor is improved through the quick fixing mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor magnetizing, in particular to a brushless motor rotor magnetizing device and method. BACKGROUND

[0002] The magnetizing machine has a simple structure, which is actually a strong electromagnet with multiple shaped iron blocks as additional magnetic poles to form a closed magnetic circuit with the magnetized body. When magnetizing, the additional magnetic poles and the magnetized body are arranged, and the magnetizing is completed instantly by applying the excitation current.

[0003] The magnetizing device and method for an internal permanent magnet synchronous motor rotor disclosed in the patent application with the publication number CN111540562B include a base, support frames fixedly connected to the left and right sides of the base, and a rotor to be magnetized rotatably connected between the two support frames. The base is slidably connected with magnetizing magnetic poles on the front and back sides. The left or right side of the rotor is provided with a positioning sleeve moving along the axial direction of the rotor. The top and bottom of the positioning sleeve axially extend positioning baffle plates between the upper and lower parts of the two magnetizing magnetic poles. The two magnetizing magnetic poles have a circular arc structure symmetrically arranged and capable of holding the rotor. When the two magnetizing magnetic poles move relative to each other, they can push the positioning sleeve and the rotor to rotate simultaneously, so that the center line of the magnetic pole of the rotor coincides with the center line of the magnetizing magnetic pole.

[0004] When magnetizing the brushless motor rotor, manual clamping of the rotor is required, and after clamping, the rotor is covered with the magnetizing machine for energized magnetization. Then, the rotor is manually taken out for subsequent rotation displacement and energized magnetization to ensure the uniformity of magnetization, which affects the magnetization efficiency due to the multiple operation procedures. SUMMARY

[0005] To overcome the deficiencies of the prior art, the present application provides a brushless motor rotor magnetizing device and method to achieve the purpose of solving the above problems.

[0006] To achieve the above purpose, the present application is implemented by the following technical solutions: a brushless motor rotor magnetizing device, including a base, an electric lifting rod fixedly connected to the top of the base, an lifting plate fixedly connected to the top end of the electric lifting rod, a magnetizer provided on the bottom of the lifting plate, a motor rotor provided below the magnetizer, and a magnetizing clamping mechanism provided on the top of the base.

[0007] The magnetizing clamping mechanism includes:

[0008] A disc, which is a circular disc structure, is rotatably connected to the top of the base. A fixed block is rotatably connected to the inner wall of the disc. The bottom of the fixed block is fixedly connected to the top of the base. A threaded rod is fixedly connected to the top of the fixed block. The disc is used to rotate the motor rotor placed thereon.

[0009] The sliding clamping block is a block structure, one side of the sliding clamping block is an inclined surface, the bottom of the sliding clamping block is slidably connected with the top of the disc through a sliding groove, and the sliding clamping block is fixedly connected with a hinged block A on one side.

[0010] Preferably, the inner wall of the hinged block A is hingedly connected with a telescopic hinge rod, the telescopic hinge rod is hingedly connected with a hinged block B, and the hinged block B is fixedly connected with an internally-threaded sleeve on one side.

[0011] Preferably, the internally-threaded sleeve is an annular sleeve structure, the inner wall of the internally-threaded sleeve is threadedly connected with the outer wall of the threaded rod, and the bottom of the internally-threaded sleeve is fixedly connected with a counterweight.

[0012] Preferably, the inner wall of the counterweight is not in contact with the outer wall of the threaded rod, the inner wall of the motor rotor is provided with a clamping groove, and the width of the clamping groove is equal to the width of the sliding clamping block.

[0013] Preferably, the outer wall of the telescopic hinge rod close to the hinged block B is fixedly connected with a fixed plate A, the outer wall of the telescopic hinge rod close to the hinged block A is fixedly connected with a fixed plate B, and the fixed plate A and the fixed plate B are fixedly connected with a spring.

[0014] Preferably, the top of the internally-threaded sleeve is provided with a slow rotation mechanism, the slow rotation mechanism comprises a vertical plate A, the bottom of the vertical plate A is fixedly connected with the top of the internally-threaded sleeve, the outer wall of the vertical plate A is slidably connected with a sliding plate, the inner wall of the sliding plate is slidably connected with a vertical plate B, the top of the vertical plate B is fixedly connected with a fixed sleeve, and the inner wall of the fixed sleeve is rotatably connected with the outer wall of the threaded rod through a bearing.

[0015] Preferably, the outer wall of the sliding plate is provided with a one-way air inlet valve and a one-way air outlet valve, and the inside of the sliding plate is in communication with the outside through the one-way air inlet valve and the one-way air outlet valve.

[0016] A brushless motor rotor magnetizing method, comprising the following steps:

[0017] First step: place the motor rotor to be magnetized on the disc on the base, when the motor rotor is placed on the disc, the clamping groove in the inner wall of the motor rotor is clamped on the sliding clamping block with a corresponding width and abuts against the sliding clamping block;

[0018] Second step: press the motor rotor on the inclined surface on one side of the sliding clamping block by pressing, when the inclined surface on one side of the sliding clamping block is subjected to a downward force, a component force is applied to the threaded rod, so that the sliding clamping block slides on the disc through the sliding groove between the sliding clamping block and the disc to approach the threaded rod;

[0019] Third step: with the sliding of the sliding clamping block, the sliding clamping block is fully retracted into the motor rotor, and the spring force is used to make the sliding clamping block tightly abut against the inner wall of the motor rotor, the clamping is completed, then the lifting plate driven by the electric lifting rod is started to descend, the motor rotor is sleeved into the magnetizer, and the motor rotor is energized and magnetized by starting the magnetizer.

[0020] The application provides a brushless motor rotor magnetizing device and method, which has the following beneficial effects:

[0021] 1、The magnetizing clamping mechanism is arranged, the spring force is used to tightly clamp the telescopic articulated rod, articulated block A and sliding clamping block in the clamping groove, the inner wall of the motor rotor is tightly squeezed, the automatic clamping of the motor rotor is completed, the problem of uneven magnetization caused by the fact that the position of the motor rotor is not fixed when the magnetizer is pressed to be energized is avoided, and the magnetization efficiency of the motor rotor is improved through the quick fixing mode.

[0022] 2、The speed-reducing rotating mechanism is arranged, the threaded rod is rotated through threaded sliding, so that the articulated block B, the telescopic articulated rod and the articulated block A start to rotate together, since the threaded rod is fixed by the fixed block below and cannot rotate, when the inner threaded sleeve is pushed to slide upward on the threaded rod, the inner threaded sleeve and the articulated block B, the telescopic articulated rod, the articulated block A and the sliding clamping block start to rotate synchronously, the sliding clamping block drives the disc to rotate synchronously, so that the motor rotor is clamped into the sliding clamping block through the clamping groove, and after the motor rotor is fixed on the disc, the disc, the sliding clamping block and the motor rotor can keep rotating during the subsequent magnetization process, so that the position does not need to be manually adjusted when magnetizing in the magnetizer, and the effect of uniform rotating magnetization is achieved.

[0023] 3、The magnetizing clamping mechanism is arranged, when the inner threaded sleeve slides upward on the outer wall of the threaded rod, since the threaded rod is located at the center position of the disc, and the inner threaded sleeve is connected with the four telescopic articulated rods through the articulated block B, when the inner threaded sleeve rises, the four articulated blocks A and sliding clamping blocks are synchronously moved through the articulated block B and the telescopic articulated rod, so that the four sliding clamping blocks move by equal distances, and the motor rotor located on the four sliding clamping blocks can automatically keep the centering effect with the concentric position of the disc, and the problem of uneven magnetization around the motor rotor during the subsequent magnetization of the magnetizer is avoided.

[0024] 4、The magnetizing clamping mechanism is arranged, after magnetizing is completed, the elastic force of the spring continues to release, still can make the internal thread sleeve slide on the outer wall of the threaded rod and rise, make the motor rotor is driven to rotate by the sliding clamping block and the clamping groove, in turn, through the long time stable slow rotation, in order to facilitate the subsequent magnetic detection of the motor rotor, also liberate the hands of the staff, to improve the magnetizing of the motor rotor and the overall work efficiency of subsequent work. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is structure schematic diagram of the present application;

[0026] Figure 2 It is structure schematic diagram of the magnetizing clamping mechanism of the present application Figure One ;

[0027] Figure 3 It is structure schematic diagram of the magnetizing clamping mechanism of the present application Figure Two ;

[0028] Figure 4 It is structure schematic diagram of the magnetizing clamping mechanism of the present application Figure Three ;

[0029] Figure 5 It is the enlarged view of A of the present application Figure 2 ;

[0030] Figure 6 It is structure schematic diagram of the magnetizing clamping mechanism of the present application Figure Four ;

[0031] Figure 7 It is the motion state of the magnetizing clamping mechanism of the present application Figure One ;

[0032] Figure 8 It is the motion state of the magnetizing clamping mechanism of the present application Figure Two ;

[0033] Figure 9 It is the motion state of the magnetizing clamping mechanism of the present application Figure Three ;

[0034] Figure 10 It is the motion state of the magnetizing clamping mechanism of the present application Figure Four ;

[0035] Figure 11 It is structure schematic diagram of the slow rotation mechanism of the present application Figure One ;

[0036] Figure 12 It is disassembled structure schematic diagram of the slow rotation mechanism of the present application;

[0037] Figure 13 It is the slow rotation mechanism of the present applicationFigure 2 Enlarged view of B in FIG. 1;

[0038] Figure 14 Structure diagram of the invention's rotation slowing mechanism Figure Two ;

[0039] Figure 15 Motion state of the invention's rotation slowing mechanism Figure One ;

[0040] Figure 16 Motion state of the invention's rotation slowing mechanism Figure Two ;

[0041] Figure 17 Motion state of the invention's rotation slowing mechanism Figure Three ;

[0042] Figure 18 Motion state of the invention's rotation slowing mechanism Figure Four .

[0043] In the figure: 1 lifting plate, 2 motor rotor, 3 magnetizing clamping mechanism, 301 disc, 302 sliding clamping block, 303 clamping groove, 304 hinged block A, 305 counterweight block, 306 telescopic hinged rod, 307 hinged block B, 308 internal thread sleeve, 309 threaded rod, 310 fixed block, 311 fixed plate A, 312 spring, 313 fixed plate B, 4 rotation slowing mechanism, 401 vertical plate A, 402 sliding plate, 403 vertical plate B, 405 fixed sleeve, 406 one-way air inlet valve, 407 one-way air outlet valve, 5 electric lifting rod, 6 magnetizer, 7 base. DETAILED DESCRIPTION

[0044] Example one: please refer to Figures 1-4 , the invention provides a technical solution: a brushless motor rotor magnetizing device, comprising a base 7, the top of the base 7 is fixedly connected with an electric lifting rod 5, the top end of the electric lifting rod 5 is fixedly connected with a lifting plate 1, the bottom of the lifting plate 1 is provided with a magnetizer 6, the magnetizer 6 is provided below the motor rotor 2, the top of the base 7 is provided with a magnetizing clamping mechanism 3;

[0045] The magnetizing clamping mechanism 3 comprises:

[0046] A disc 301, the disc 301 is a circular disc structure, the disc 301 is rotatably connected with the top of the base 7, the inner wall of the disc 301 is rotatably connected with a fixed block 310, the bottom of the fixed block 310 is fixedly connected with the top of the base 7, the top of the fixed block 310 is fixedly connected with a threaded rod 309, the disc 301 is used to rotate the motor rotor 2 placed thereon;

[0047] The sliding clamping block 302 is a block structure, one side of the sliding clamping block 302 is an inclined surface, the bottom of the sliding clamping block 302 is slidably connected with the top of the disc 301 through a sliding groove, and the sliding clamping block 302 is fixedly connected with a hinged block A 304 on one side.

[0048] In use, the motor rotor 2 to be magnetized is placed on the disc 301 on the base 7, and then the electric lifting rod 5 is started to drive the lifting plate 1 to descend, the motor rotor 2 is sleeved in the magnetizer 6, and the motor rotor 2 is energized and magnetized by starting the magnetizer 6.

[0049] Embodiment two: please refer to Figures 1-10 On the basis of the embodiment one, the application provides a technical solution that the hinged block A 304 is hingedly connected with a telescopic hinge rod 306, the telescopic hinge rod 306 is hingedly connected with a hinged block B 307, and the hinged block B 307 is fixedly connected with an internally-threaded sleeve 308 on one side.

[0050] The internally-threaded sleeve 308 is an annular sleeve structure, the inner wall of the internally-threaded sleeve 308 is threadedly connected with the outer wall of the threaded rod 309, and the bottom of the internally-threaded sleeve 308 is fixedly connected with a counterweight 305.

[0051] The inner wall of the counterweight 305 is not in contact with the outer wall of the threaded rod 309, the inner wall of the motor rotor 2 is provided with a clamping groove 303, and the width of the clamping groove 303 is equal to the width of the sliding clamping block 302.

[0052] The telescopic hinge rod 306 is fixedly connected with a fixed plate A 311 on the outer wall close to the hinged block B 307, the telescopic hinge rod 306 is fixedly connected with a fixed plate B 313 on the outer wall close to the hinged block A 304, and the fixed plate A 311 and the fixed plate B 313 are fixedly connected with a spring 312.

[0053] When the motor rotor 2 is placed on the disc 301, the clamping groove 303 in the inner wall of the motor rotor 2 is clamped on the sliding clamping block 302 with a corresponding width, and abuts against the inclined surface on one side of the sliding clamping block 302, and the motor rotor 2 is pressed on the inclined surface on one side of the sliding clamping block 302 in a pressing mode, the inclined surface on one side of the sliding clamping block 302 receives a downward force and then exerts a component force on the threaded rod 309, so that the sliding clamping block 302 slides on the disc 301 through the sliding groove between the disc 301 and the sliding clamping block 302 to approach the threaded rod 309;

[0054] When the threaded rod 309 at the center of the four sliding clamping blocks 302 slides to the center position of the disc 301, the sliding clamping block 302 pushes the telescopic articulated rod 306 through the articulated block A 304, the telescopic articulated rod 306 pushes the articulated block B 307 to the inner threaded sleeve 308 through the built-in spring of the inner wall, at this time the inner threaded sleeve 308 cannot be pushed, so the telescopic articulated rod 306 starts to shrink and extrudes the spring 312 between the fixed plate A 311 and the fixed plate B 313 on the telescopic articulated rod 306 to deform, until the motor rotor 2 continues to press down to the vertical surface on one side of the sliding clamping block 302 beyond the inclined surface of the sliding clamping block 302, so that the spring 312 pushes the telescopic articulated rod 306, the articulated block A 304 and the sliding clamping block 302 tightly into the clamping groove 303 through the elastic force, and tightly extrudes the inner wall of the motor rotor 2 through the extrusion force, completing the automatic clamping of the motor rotor 2, avoiding the problem of uneven magnetization caused by the position of the motor rotor 2 not being fixed when the charger 6 is pressed and powered on, and improving the magnetization efficiency of the motor rotor 2 through the quick fixing method.

[0055] Embodiment three: please refer to Figures 1-18 On the basis of embodiment one and embodiment two, the application provides a technical solution: the top of the inner threaded sleeve 308 is provided with a slow rotation mechanism 4, the slow rotation mechanism 4 includes a vertical plate A 401, the bottom of the vertical plate A 401 is fixedly connected with the top of the inner threaded sleeve 308, a sliding plate 402 is slidably connected with the outer wall of the vertical plate A 401, a vertical plate B 403 is slidably connected with the inner wall of the sliding plate 402, and a fixed sleeve 405 is fixedly connected with the top of the vertical plate B 403.

[0056] A one-way air inlet valve 406 and a one-way air outlet valve 407 are arranged on the outer wall of the sliding plate 402, and the inside of the sliding plate 402 is in communication with the outside through the one-way air inlet valve 406 and the one-way air outlet valve 407.

[0057] When the telescopic articulated rod 306 pushes the inner threaded sleeve 308, the inner threaded sleeve 308 is lifted by pushing the vertical plate A 401, the sliding plate 402 and the vertical plate B 403 above to shrink mutually, and when they shrink mutually, air is discharged through the one-way air outlet valve 407, and the diameter of the one-way air outlet valve 407 is small, so the discharge speed is limited, so that when the articulated block B 307 pushes the inner threaded sleeve 308, the lifting speed of the inner threaded sleeve 308 is greatly slowed down when it rises and rotates on the outer wall of the threaded rod 309, and because the thread angle of the threads on the outer wall of the threaded rod 309 and the inner wall of the inner threaded sleeve 308 is greater than forty-five degrees, the friction of the threaded sliding is low, so the inner threaded sleeve 308 can smoothly slide up and rotate on the threaded rod 309;

[0058] The continuous slow exhaust of the external air through the one-way exhaust valve 407 can make the vertical plate A 401, the sliding plate 402 and the vertical plate B 403 continuously shorten. When the vertical plate A 401, the sliding plate 402 and the vertical plate B 403 are stretched away from each other, the air is in through the one-way air inlet valve 406, the opening of the one-way air inlet valve 406 is not hindered, and the opening of the one-way exhaust valve 407 is small, so the air is limited when the vertical plate A 401, the sliding plate 402 and the vertical plate B 403 are pressed. The one-way air inlet valve 406 and the one-way exhaust valve 407 are both one-way air inlet channels, and air cannot be diverted.

[0059] After the motor rotor 2 is quickly clamped into the four sliding clamping blocks 302, the spring 312 releases the elastic force, continuously pushes the inner threaded sleeve 308 to slowly rise on the threaded rod 309, and rotates through threaded sliding, so that the articulated block B 307, the telescopic articulated rod 306 and the articulated block A 304 begin to rotate together. Since the threaded rod 309 is fixed by the fixed block 310 below, the threaded rod 309 cannot rotate, so when the inner threaded sleeve 308 is pushed to slide and rise on the threaded rod 309, the inner threaded sleeve 308 and the articulated block B 307, the telescopic articulated rod 306, the articulated block A 304 and the sliding clamping block 302 will begin to rotate synchronously, and the sliding clamping block 302 drives the disc 301 to rotate synchronously, thereby completing the clamping of the motor rotor 2 into the sliding clamping block 302 through the clamping groove 303. After the motor rotor 2 is fixed on the disc 301, the disc 301 and the sliding clamping block 302 and the motor rotor 2 can always rotate during the subsequent magnetizing process, so that the position does not need to be adjusted manually when magnetizing in the magnetizer 6, so as to achieve uniform rotation and magnetizing effect.

[0060] When the inner threaded sleeve 308 slides and rises on the outer wall of the threaded rod 309, since the threaded rod 309 is located at the center of the disc 301, and the inner threaded sleeve 308 is connected to the four telescopic articulated rods 306 through the articulated block B 307, when the inner threaded sleeve 308 rises, it will simultaneously pull the four articulated blocks A 304 and the sliding clamping blocks 302 through the articulated block B 307 and the telescopic articulated rod 306, so that the four sliding clamping blocks 302 move an equal distance, and the motor rotor 2 located on the four sliding clamping blocks 302 can automatically maintain the centering effect of the concentric circle position of the disc 301, avoiding the problem of uneven magnetization around the motor rotor 2 during the subsequent magnetization of the magnetizer 6;

[0061] And after the magnetization is completed, the spring 312 continues to release the elastic force, and the inner threaded sleeve 308 still slides up on the outer wall of the threaded rod 309, so that the motor rotor 2 is driven to rotate by the sliding clamping block 302 and the clamping groove 303, and then through the long-term stable and slow rotation, the subsequent magnetic detection of the motor rotor 2 is facilitated, and the hands of the workers are freed, so that the overall work efficiency of the magnetization and subsequent work of the motor rotor 2 is improved.

[0062] And after the magnetization is completed, the spring 312 continues to release the elastic force, and the inner threaded sleeve 308 still slides up on the outer wall of the threaded rod 309, so that the motor rotor 2 is driven to rotate by the sliding clamping block 302 and the clamping groove 303, and then through the long-term stable and slow rotation, the subsequent magnetic detection of the motor rotor 2 is facilitated, and the hands of the workers are freed, so that the overall work efficiency of the magnetization and subsequent work of the motor rotor 2 is improved.

[0063] A brushless motor rotor magnetizing method, comprising the following steps:

[0064] First step: place the motor rotor 2 to be magnetized on the disc 301 on the base 7, when the motor rotor 2 is placed on the disc 301, the clamping groove 303 on the inner wall of the motor rotor 2 is clamped on the sliding clamping block 302 of the corresponding width and abuts against;

[0065] Second step: press the motor rotor 2 on the inclined surface on one side of the sliding clamping block 302 by pressing the inclined surface on one side of the sliding clamping block 302, when the inclined surface on one side of the sliding clamping block 302 is subjected to a downward force, a component force is applied to the threaded rod 309, so that the sliding clamping block 302 slides on the disc 301 to approach the threaded rod 309 through the sliding groove between the disc 301 and the sliding clamping block 302;

[0066] Third step: with the sliding of the sliding clamping block 302, the sliding clamping block 302 is completely retracted into the motor rotor 2, and the spring 312 is used to make the sliding clamping block 302 abut against the inner wall of the motor rotor 2 tightly, the clamping is completed, then the lifting plate 1 driven by the electric lifting rod 5 is lowered, the motor rotor 2 is sleeved in the magnetizer 6, and the motor rotor 2 is magnetized by starting the magnetizer 6.

[0067] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A brushless motor rotor magnetizing device, comprising a base (7), an electric lifting rod (5) fixedly connected to the top of the base (7), a lifting plate (1) fixedly connected to the top of the electric lifting rod (5), a magnetizer (6) provided at the bottom of the lifting plate (1), and a motor rotor (2) provided below the magnetizer (6), characterized in that: The bottom seat (7) top is provided with magnetization clamping mechanism (3); The magnetization clamping mechanism (3) comprises: Disc (301), the disc (301) is circular disc structure, the disc (301) is rotatably connected with the top of the base (7), the inner wall of the disc (301) is rotatably connected with the fixed block (310), the bottom of the fixed block (310) is fixedly connected with the top of the base (7), the top of the fixed block (310) is fixedly connected with the threaded rod (309), the disc (301) is used for the motor rotor (2) placed on it rotates the function; Sliding clamping block (302), the sliding clamping block (302) is block structure, one side of the sliding clamping block (302) is inclined surface, the bottom of the sliding clamping block (302) is slidably connected with the top of the disc (301) through the sliding groove, one side of the sliding clamping block (302) is fixedly connected with the hinge block A (304), the sliding clamping block (302) is used for being pressed down by the motor rotor (2) on the disc (301) to slide; The hinge block A (304) is hingedly connected with the telescopic hinge rod (306), the telescopic hinge rod (306) is hingedly connected with the hinge block B (307), one side of the hinge block B (307) is fixedly connected with the internal thread sleeve (308); The telescopic hinge rod (306) is fixedly connected with the fixed plate A (311) on the outer wall close to the hinge block B (307), the telescopic hinge rod (306) is fixedly connected with the fixed plate B (313) on the outer wall close to the hinge block A (304), the fixed plate A (311) and the fixed plate B (313) are fixedly connected with the spring (312) between them; The internal thread sleeve (308) top is provided with the slow rotation mechanism (4), the slow rotation mechanism (4) includes vertical plate A (401), the vertical plate A (401) bottom is fixedly connected with the internal thread sleeve (308) top, the outer wall of the vertical plate A (401) is slidably connected with the sliding plate (402), the inner wall of the sliding plate (402) is slidably connected with the vertical plate B (403), the top of the vertical plate B (403) is fixedly connected with the fixed sleeve (405), the inner wall of the fixed sleeve (405) is rotatably connected with the outer wall of the threaded rod (309) through the bearing.

2. A brushless motor rotor magnetizing device according to claim 1, characterized in that: The internal thread sleeve (308) is annular sleeve structure, the inner wall of the internal thread sleeve (308) is threadedly connected with the outer wall of the threaded rod (309), the bottom of the internal thread sleeve (308) is fixedly connected with the counterweight block (305).

3. A brushless motor rotor magnetizing device according to claim 2, characterized in that: The inner wall of the counterweight block (305) is not in contact with the outer wall of the threaded rod (309), the inner wall of the motor rotor (2) is provided with a clamping groove (303), the width of the clamping groove (303) is equal to the width of the sliding clamping block (302).

4. A brushless motor rotor magnetizing device according to claim 3, characterized in that: The outer wall of the sliding plate (402) is provided with one-way inlet valve (406) and one-way outlet valve (407), the inside of the sliding plate (402) is communicated with the outside through the one-way inlet valve (406) and the one-way outlet valve (407).

5. A method for magnetizing a brushless motor rotor based on the brushless motor rotor magnetizing device according to any one of claims 1-4, characterized in that, It comprises the following steps: First step: the motor rotor (2) which needs to be magnetized is placed on the disc (301) on the base (7), when the motor rotor (2) is placed on the disc (301), the clamping groove (303) on the inner wall of the motor rotor (2) is clamped on the sliding clamping block (302) with corresponding width and abuts against it; Second step: the inclined surface on one side of the sliding clamping block (302) presses the motor rotor (2) on the inclined surface on one side of the sliding clamping block (302) by pressing, when the inclined surface on one side of the sliding clamping block (302) is subjected to downward force, it will apply a component force to the threaded rod (309), so that the sliding clamping block (302) slides on the disc (301) through the sliding groove between the disc (301) to approach the threaded rod (309); Third step: with the sliding of the sliding clamping block (302), the sliding clamping block (302) is completely retracted into the interior of the motor rotor (2), and the spring (312) is used to make the sliding clamping block (302) tightly abut against the inner wall of the motor rotor (2), so that the clamping is completed, then the lifting plate (1) driven by the electric lifting rod (5) is lowered, the motor rotor (2) is sleeved in the magnetizer (6), and the motor rotor (2) is completed by starting the magnetizer (6) to complete the energizing and magnetizing.

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