Permanent magnet motor magnetic steel withdrawing tool

Abstract

The invention discloses a permanent magnet motor magnetic steel withdrawing tool, is used for solving the technical problem that a top plate is easy to incline when magnetic steel withdraws, and belongs to the technical field of permanent magnet motors. The device comprises a jack, a top plate, a guide plate, a base and a pull rod, a plurality of mounting holes for mounting the jack are formed in the top plate, fixing holes are uniformly formed in the edges of the top plate and the guide plate, threaded holes are formed in the edge of the base, and the pull rod sequentially penetrates through the fixing holes of the top plate and the guide plate and then is screwed in the threaded holes of the base. A height limiting part for limiting the distance between the top plate and the guide plate is placed between the top plate and the guide plate, a rotor iron core is installed between the guide plate and the base, the height of the height limiting part is not larger than the stroke length of a jack ejector rod, and the top of the pull rod is fixed to the top of the top plate through a nut; a jacking column is placed between the jack jacking rod and the guide plate and can pass through the magnetic steel groove, and a material leakage hole is formed in the base.

Description

Technical Field

[0001] The invention belongs to the technical field of permanent magnet motors, and relates to a magnet steel withdrawal technology, in particular to a permanent magnet motor magnet steel withdrawal tooling. Background Art

[0002] Permanent magnet motors have the advantages of high power density, high efficiency, strong environmental adaptability, and low life cycle cost in the fields of EMUs, subway cars, coal mines, etc. In recent years, the company has designed and developed a variety of permanent magnet motors. The maintenance after mass production requires the mastery of magnetic steel withdrawal technology, so the design and development of magnetic steel withdrawal tooling is of great significance. At the same time, studying the force used to withdraw the magnetic steel of each motor and understanding the bonding performance of the magnetic steel adhesive used are also of great significance to the research and development of permanent magnet motors.

[0003] The magnet removal tooling currently used has the following defects: some magnets on the rotor can be removed, while others cannot; the amount of force used to remove the magnet is highly correlated with the strength of the magnet filling glue (insulating varnish, epoxy resin, silicone) used; when the prior art removes the magnet, the force application point cannot be directly opposite to the pressure center of the magnet, so the thrust measured when removing the magnet using the same filling glue is highly discrete, and it is impossible to compare the amount of force used when removing the magnets bonded with the three filling glues used in the test, namely silicone, epoxy resin, and insulating varnish.

[0004] The prior art method for withdrawing the magnetic steel is: two pull rods are passed through the two ventilation holes on the rotor core, the top plate and the pull rods are fixed together by nuts, and then the top plate is connected to the rotor core, a push column is placed in the rectangular guide hole of the guide plate, the hydraulic cylinder is placed on the top plate, the push rod of the hydraulic cylinder is aligned with the push column to open the pump station, and pressure is applied to the push column in the rectangular guide hole through the push rod of the hydraulic cylinder, and the push column then applies force to the magnetic steel to withdraw the magnetic steel.

[0005] Because the two pull rods and the rotor core are not fixed, the top plate is often tilted during the withdrawal of the magnet, which in turn causes the pull rod to bend and deform. The top column in the rectangular guide hole tilts, causing the end face of the top column to make point contact or line contact with the magnet. Due to the high brittleness of the magnet, the magnet often cracks, which can easily cause safety accidents. The magnet will also be scrapped, and it is difficult to clean up the magnet fragments, causing great trouble to subsequent work.

[0006] In short, the top plate is not fixed relative to the rotor core, which causes the top column used to apply force when the magnet is withdrawn to easily tilt, resulting in a reduced force application surface or even point contact, resulting in a high breakage rate of the magnet and core, and the inability to detect the actual thrust used. Summary of the invention

[0007] The purpose of the present invention is to provide a permanent magnet motor magnet withdrawal tooling to solve the technical problem that the top plate is prone to tilting when the magnet is withdrawn.

[0008] The present invention is achieved by adopting the following technical solutions: The permanent magnet motor magnetic steel withdrawal tooling includes a jack, a top plate, a guide plate, a base and a pull rod. The top plate is provided with a plurality of mounting holes for installing the jack. The edges of the top plate and the guide plate are provided with fixing holes. The edge of the base is provided with a threaded hole. The pull rod passes through the fixing holes of the top plate and the guide plate in sequence and is screwed on the threaded hole of the base. A height limiting component for limiting the distance between the top plate and the guide plate is placed between the top plate and the guide plate. The top of the pull rod is fixed to the top of the top plate by a nut. The guide plate is provided with guide holes corresponding to the magnetic steel grooves one by one. A top column is placed between the top rod of the jack and the magnetic steel groove. The top column can pass through the magnetic steel groove. The base is provided with a leakage hole.

[0009] When in use, first place the rotor core between the guide plate and the base, then pass the pull rod through the fixing hole on the guide plate and screw it on the threaded hole on the base; then place the height limiting component on the guide plate, and then buckle the top plate on the height limiting component, and pass the pull rod through the fixing hole on the top plate. At this time, adjust the guide hole on the guide plate to correspond to the magnetic steel slot on the top of the rotor core, and then adjust the magnetic steel slot at the bottom of the rotor core to correspond to the leakage hole; finally, use nuts to fix the top plate, height limiting component, guide plate, rotor core and base together, which can prevent the top plate from being skewed during the operation of the jack, and then prevent the top column from being skewed during the withdrawal of the magnetic steel, resulting in a high breakage rate of the magnetic steel and the core.

[0010] After installing the jack on the mounting hole, place the push column in the guide hole and turn on the jack oil pump. The push rod of the jack will push the push column to squeeze the magnet in the magnet groove, and then the magnet of the rotor core can be withdrawn. During the withdrawal of the magnet, the top plate will not be skewed, and the push rod of the jack will not be skewed, so the push column can smoothly push the magnet to withdraw.

[0011] Since the thrust of the jack is always in a straight line, the end face of the top column and the magnetic steel always maintain surface contact, which can greatly reduce the breakage rate of the magnetic steel.

[0012] Further preferably, the positions of the leakage holes correspond one by one to the positions of the magnetic steel slots on the rotor core, and the size of each leakage hole is larger than the size of the corresponding magnetic steel slot, so that the leakage hole will not cause obstruction when the magnetic steel is withdrawn, and the size of each guide hole is smaller than the size of the corresponding magnetic steel slot, so that when the magnetic steel is withdrawn, the top column will not damage the rotor core.

[0013] Further preferably, a vacant cavity for accommodating the rotor core pressing ring is provided in the middle of the base, so that the rotor core pressing ring and the base plane can be pressed tightly to avoid the "warping" phenomenon when the magnetic steel is withdrawn, and the leakage hole is provided on the bottom wall of the vacant cavity.

[0014] Further preferably, the height limiting component is a contour sleeve, and the contour sleeve is arranged on the pull rod between the top plate and the guide plate.

[0015] Further preferably, the top column passes through the guide hole and is located between the jack and the magnetic steel slot. The cross-sectional shape of the top column is the shape of the magnetic steel slot after removing the magnetic bridge part. The top cross-sectional shape is the same as the shape of the magnetic steel and different from the shape of the magnetic steel slot. This can prevent the weak parts of the rotor core from being squeezed and deformed by the filling glue during the withdrawal of the magnetic steel, causing the rotor core to be scrapped.

[0016] Further preferably, the base is placed on a bracket, the bracket includes an upper ring and a lower ring, the upper ring and the lower ring are connected by three columns, and the inner diameter of the upper ring is not less than the range of the rotor core containing the magnetic steel.

[0017] Further preferably, the guide plate is installed with at least one positioning pin 1, and the base is installed with at least one positioning pin 2, the installation positions of the positioning pin 1 and the positioning pin 2 correspond to the positions of the ventilation holes on the rotor core, the center of the guide plate is provided with an avoidance hole 1 for the rotor core shaft, and the center of the base is provided with an avoidance hole 2 for the rotor core shaft.

[0018] Further preferably, the center positions of different mounting holes correspond to the force centers of different types of magnets, so that each magnet that needs to be withdrawn can be accurately withdrawn.

[0019] Further preferably, a magnet model identification is provided near each mounting hole of the top plate. Since the magnets of the same group are large and small, it is possible to quickly identify which type of magnet each mounting hole is used to exit, thereby facilitating quick selection of a suitable jack and top column.

[0020] Further preferably, the center position of each mounting hole corresponds to the comprehensive force center of each group of magnets, and one group of magnets can be withdrawn at a time.

[0021] Further preferably, a pressure sensor is provided on the top rod of the jack. For rotor cores of different models or different magnetic steel filling glues used in the magnetic bridge of the same rotor core, the pressure sensor can be installed on the jack first to measure the precise pushing force when the magnetic steel is withdrawn, which has obvious guiding significance for the next time the same rotor core withdraws the magnetic steel.

[0022] The present invention has the following beneficial effects: 1. Able to detect the force applied when withdrawing the magnetic steel; 2. Realize single or multiple precise exit of magnetic steel; 3. Ensure that the magnetic steel is intact and undamaged to the greatest extent possible and can be reused; 4. Able to realize one-time withdrawal of a group of magnets; 5. It can ensure the personal safety of operators during the removal of magnetic steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the structure of the present invention is shown.

[0026] Figure 2 A schematic diagram of the base is shown.

[0027] Figure 3 It shows one of the schematic diagrams of the second embodiment of the present invention.

[0028] Figure 4 The second schematic diagram shows the second embodiment of the present invention.

[0029] Figure 5 A schematic diagram of the top plate of embodiment 3 is shown.

[0030] Figure 6 A schematic diagram of the top plate of Example 4 is shown.

[0031] Figure 7 A schematic diagram of a top column is shown.

[0032] Figure 8 A schematic diagram of a jack according to embodiment five is shown.

[0033] In the figure: 1-jack, 11-pressure sensor, 12-quick-change nozzle, 2-top plate, 3-guide plate, 31-guide hole, 32-avoidance hole one, 4-base, 41-threaded hole, 42-leakage hole, 43-empty cavity, 44-avoidance hole two, 5-pull rod, 51-nut, 7-height limiting component, 8-rotor core, 81-magnetic steel, 82-ventilation hole, 83-pressure ring, 84-rotating shaft, 9-top column, 10-bracket. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0035] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0037] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] In embodiment one, the permanent magnet motor magnetic steel withdrawal tooling includes a jack 1, a top plate 2, a guide plate 3, a base 4 and a pull rod 5. The top plate 2 is provided with a plurality of mounting holes for installing the jack 1. The edges of the top plate 2 and the guide plate 3 are evenly provided with fixing holes. In this embodiment, the number of fixing holes is 8, which are evenly distributed on the edges of the top plate 2 and the guide plate 3. Threaded holes 41 are evenly distributed on the edge of the base 4, and the pull rod 5 passes through the fixing holes of the top plate 2 and the guide plate 3 in turn and is screwed on the threaded holes 41 of the base 4. A height limiting component 7 for limiting the distance between the top plate 2 and the guide plate 3 is placed between the top plate 2 and the guide plate 3, and a rotor core 8 is installed between the guide plate 3 and the base 4. The height of the height limiting component 7 is not greater than the stroke length of the top rod of the jack 1. The top of the pull rod 5 is fixed to the top of the top plate 2 by a nut 51, and the guide plate 3 is provided with guide holes 31 corresponding to the magnetic steel grooves one by one. A top column 9 is placed between the top rod of the jack 1 and the guide plate 3, and the top column 9 can pass through the magnetic steel groove. The base 4 is provided with a leakage hole 42. The number and type of the top column 9 are prepared in advance according to the magnetic steel 81 that needs to be withdrawn. In order to avoid the magnetic steel 81 from being adsorbed on the tooling after the withdrawal and causing damage to the magnetic steel 81, all parts in this embodiment are made of stainless steel with the lowest magnetism.

[0039] Embodiment 2: The position of the leakage holes 42 in this embodiment corresponds to the position of the magnetic steel slot on the rotor core 8. The size of each leakage hole 42 is larger than the size of the corresponding magnetic steel slot, and the size of each guide hole 31 is smaller than the size of the corresponding magnetic steel slot. A vacant cavity 43 for accommodating the rotor core pressing ring 83 is provided in the middle of the base 4, and the leakage holes 42 are provided on the bottom wall of the vacant cavity 43. The reason why the shape and position of the leakage holes 42 in this embodiment correspond to the shape and position of the magnetic steel slot is to protect the rotor core 8. When the magnetic steel 81 is withdrawn, the initial stress is the largest. If the leakage holes 42 on the base 4 are too large, they cannot support the core pressing ring 83, which can easily cause the bottom of the rotor core 8 to deform.

[0040] The height limiting component 7 can be a block-shaped entity placed between the top plate 2 and the guide plate 3. In this embodiment, the height limiting component 7 is a height-conforming sleeve, which is arranged on the pull rod 5 between the top plate 2 and the guide plate 3.

[0041] The top column 9 passes through the guide hole 31 and is located between the jack 1 and the magnetic steel slot. The cross-sectional shape of the top column 9 is the shape of the magnetic steel slot minus the magnetic bridge portion.

[0042] The base 4 is placed on the bracket 10 . The bracket 10 includes an upper ring and a lower ring. The upper ring and the lower ring are connected by three columns. The inner diameter of the upper ring is not less than the range of the rotor core 8 including the magnetic steel 81 .

[0043] The guide plate 3 is provided with at least one positioning pin 1, and the base 4 is provided with at least one positioning pin 2. The positions of the positioning pins 1 and 2 correspond to the positions of the ventilation holes 82 on the rotor core 8. The center of the guide plate 3 is provided with an avoidance hole 1 32 for the rotating shaft 84 of the rotor core 8, and the center of the base 4 is provided with an avoidance hole 2 44 for the rotating shaft 84 of the rotor core 8. In this embodiment, there are two positioning pins 1 and 2, and the positioning pins 1 and 2 are interference fit with the guide plate 3 and the base 4, and are clearance fit with the rotor core 8.

[0044] During operation, first place the base 4 on the bracket 10, use the two ventilation holes 82 on the rotor core 8 as positioning holes, and install them on the two positioning pins 2 on the base 4 to ensure that the magnet 81 is aligned with the leakage hole 42 on the base 4 to ensure that there is no obstruction when the magnet 81 is withdrawn; the non-driving end or driving end pressure ring 83 of the rotor core is accommodated in the empty cavity 43 on the base 4 to ensure that the plane on the base 4 is pressed tightly against the end face of the rotor core 8 to prevent the "warping" phenomenon when the magnet 81 is withdrawn.

[0045] Then align the two positioning pins on the guide plate 3 with the two ventilation holes 82 on the rotor core 8 to ensure that each guide hole 31 on the guide plate 3 is aligned with each magnetic steel 81. Then, place the guide plate 3 flat on the upper plane of the rotor core 8, and screw the lower ends of the eight tie rods 5 through the eight fixing holes on the guide plate 3 onto the eight threaded holes 41 of the base 4.

[0046] Finally, put the 8 equal-height sleeves on the 8 tie rods 5, pass the fixing holes of the top plate 2 through the tie rods 5, screw the nuts 51 on the top of the tie rods 5, and fix the top plate 2, the guide plate 3, the rotor core 8 and the base 4 with the tie rods 5. Put the required top column 9 into the guide hole 31 of the guide plate 3 corresponding to the magnetic steel 81 to be withdrawn, and then start the corresponding jack 1 to withdraw one magnetic steel 81, and then start another jack 1 to withdraw all the magnetic steels 81 to be withdrawn in sequence.

[0047] In the third embodiment, the center positions of different mounting holes correspond to the force centers of different types of magnets 81. A magnet 81 model identification is arranged near each mounting hole of the top plate 2. In this embodiment, the magnet 81 model identification is arranged on the upper plane of the top plate 2. If the rotating shaft 84 of the rotor core 8 is relatively long, the top plate 2 can be provided with a center hole to avoid the position of the rotating shaft 84. At the same time, it can also play the function of fixing the axis, so that the top plate 2 is coaxial with the guide plate 3, the rotor core 8 and the base 4, which is more conducive to the operation of withdrawing the magnet 81. After the top plate 2 is installed, the rotating shaft 84 and the top plate 2 are further fixed with the round nut 51 of the rotor core 8.

[0048] In this embodiment, the permanent magnet motor rotor core 8 has 8 groups of magnetic steels 81. Figure 5 As shown, each group of magnets 81 has two large and two small magnets, totaling 4 pieces, and 8 groups have a total of 32 magnets 81. To withdraw a certain magnet 81, only when the pressure is directed to the center of a certain magnet 81 can the force be uniformly applied. In this embodiment, there are 4 types of magnets 81, so the top plate 2 is provided with 4 mounting holes, and the center position of each mounting hole corresponds to the force center of a type of magnet 81, and 2 types of top columns 9 are prepared (two large magnets 81 share one type of top column 9, and two small magnets 81 share one type of top column 9).

[0049] During operation, the appropriate jack 1 can be quickly found according to the model identification of the plane magnetic steel 81 on the top plate 2, and the jack 1 can be installed in the corresponding installation hole.

[0050] Then, the corresponding top column 9 is placed into the guide hole 31 of the guide plate 3, and pressure is applied to the top column 9 by the jack 1 on the top plate 2 to withdraw the magnetic steel 81 that needs to be withdrawn.

[0051] If all 32 magnets 81 need to be removed, four top pillars 9 can be placed at the same time for operation. After one operation is completed, four different types of magnets 81 can be removed, the nut 51 is unscrewed, and the top plate 2 is rotated 45 degrees and installed again. In this way, the center position of each mounting hole corresponds to the same type of magnet 81 of the next group. After the four magnets 81 are removed by the same operation, the top plate 2 is rotated again until all the magnets 81 of the rotor core 8 are removed.

[0052] This embodiment can remove any one or more magnets 81 and ensure that the center of the top rod of the jack 1 coincides with the pressure center of each magnet 81 that needs to be removed, thereby achieving single or multiple precise withdrawal of the magnets 81.

[0053] In the fourth embodiment, the center position of each mounting hole corresponds to the comprehensive force center of each group of magnetic steels 81 .

[0054] This embodiment also uses a permanent magnet motor rotor core 8 with a total of 8 groups of magnetic steels 81, such as Figure 3 As shown, each group of magnets 81 has four pieces, two large and two small, and eight groups have a total of 32 magnets 81. Due to the limited space of the top plate 2, the top plate 2 of this embodiment is still provided with four mounting holes, and the center position of each mounting hole corresponds to the comprehensive force center of each group of magnets 81, and two types of top columns 9 are also required.

[0055] If it is necessary to withdraw four types of magnets 81 of the same group at one time, the top plate 2 of this embodiment can be used, and a jack 1 with greater power needs to be replaced. During operation, the four top columns 9 are placed in the corresponding guide holes 31 of the same group of magnets 81. Starting the jack 1 can withdraw one group of magnets 81 at one time.

[0056] If all 32 magnets 81 need to be removed, 16 top columns 9 can be placed at the same time for operation, and 4 jacks 1 can be started at the same time. After pushing out 4 groups of magnets 81, unscrew the nut 51, rotate the top plate 2 45 degrees and install it again, so that the center position of each mounting hole corresponds to the next group of magnets 81. After removing 4 groups of magnets 81 through the same operation, all magnets 81 of the rotor core 8 can be removed.

[0057] During operation, a quick-change nozzle 12 can also be set on the jack 1, and the quick-change head of the pump station can be connected to the quick-change nozzle 12 of the corresponding jack 1, and then the pump station switch can be turned on for operation, and then the quick-change head can be removed and connected to the next jack 1 for operation, which can reduce the pressure of starting 4 jacks 1 at a time.

[0058] In the fifth embodiment, a pressure sensor 11 can be fixed on the top rod of the jack 1 by bolts, and the pressure sensor 11 is connected to an external controller. When the top rod of the jack 1 withdraws from the magnetic steel 81, the external controller can output the pressure change value of the pressure sensor 11. There are magnetic steel 81 and filling glue in the magnetic steel slot on the rotor core 8, but the filling glue is only available at both ends of the rotor core 8, which means that the initial thrust required when withdrawing the magnetic steel 81 is relatively large, and the thrust required at other times is relatively small. The type of filling glue of the same rotor core 8 is different, and the initial thrust is different. In order to achieve batch operation, the initial thrust can be measured by experiment. After the pressure sensor 11 is installed on the top rod of the jack 1, the required thrust range can be detected to provide thrust data for batch operation. At the same time, by using different filling glues for experiments, the approximate range of thrust required for different filling glues can be understood, and the obtained range can be provided to the R&D department. When the R&D department designs a new rotor core, it can quickly locate the required filling glue type.

[0059] The present invention has the following advantages: 1. Safety: The center of the jack 1 completely coincides with the pressure center of the withdrawn magnet 81 or the entire set of magnets 81, ensuring that the top column 9 will not tilt and cause local contact when the magnet 81 is withdrawn, thereby avoiding personal safety and quality safety accidents caused by the magnet 81 being crushed due to local force on the magnet 81.

[0060] 2. High efficiency: The whole group of magnetic steel 81 withdrawal scheme (Example 4) realizes the one-time withdrawal of the whole group of magnetic steel 81, which is highly efficient.

[0061] 3. Precision: The precise withdrawal scheme of the magnetic steel 81 (Example 3) realizes the precise withdrawal of a single magnetic steel 81 at any position.

[0062] 4. Reduce labor intensity: The hydraulic pump station is used to drive the jack 1, which reduces labor intensity.

[0063] 5. Reduce costs: The center of the jack 1 completely coincides with the pressure center of the withdrawn magnet 81 or the entire group of magnets 81, ensuring that the top column 9 will not tilt and cause local contact when the magnet 81 is withdrawn, avoiding the magnet 81 from being broken due to local force on the magnet 81, ensuring the integrity of the magnet 81 when it is withdrawn, and realizing the recycling and reuse of the magnet 81 when the motor is repaired; it also saves the process of cleaning the debris of the magnet 81 caused by the breakage of the magnet 81.

[0064] The above is only a specific implementation of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. The permanent magnet motor magnetic steel exit tooling is characterized by: The invention comprises a jack (1), a top plate (2), a guide plate (3), a base (4) and a pull rod (5), wherein the top plate (2) is provided with a plurality of mounting holes for mounting the jack (1), the top plate (2) and the guide plate (3) are provided with fixing holes at their edges, and the base (4) is provided with a threaded hole (41) at its edge, and the pull rod (5) passes through the fixing holes of the top plate (2) and the guide plate (3) in sequence and is then screwed onto the threaded hole (41) of the base (4). A height limiting component (7) for limiting the distance between the top plate (2) and the guide plate (3) is placed between the top plate (2) and the guide plate (3); the top of the pull rod (5) is fixed to the top of the top plate (2) by a nut (51); the guide plate (3) is provided with guide holes (31) corresponding to the magnetic steel grooves one by one; a top column (9) is placed between the top rod of the jack (1) and the magnetic steel groove; the top column (9) can pass through the magnetic steel groove; and the base (4) is provided with a leakage hole (42).

2. The permanent magnet motor magnetic steel removal tool according to claim 1 is characterized in that: The positions of the leakage holes (42) correspond one-to-one to the positions of the magnetic steel slots on the rotor core (8); the size of each leakage hole (42) is larger than the size of the corresponding magnetic steel slot; and the size of each guide hole (31) is smaller than the size of the corresponding magnetic steel slot.

3. The permanent magnet motor magnetic steel removal tooling according to claim 2 is characterized in that: A vacant cavity (43) for accommodating a rotor core pressing ring (83) is provided in the middle of the base (4), and the leakage hole (42) is provided on the bottom wall of the vacant cavity (43).

4. The permanent magnet motor magnetic steel removal tool according to claim 1 is characterized in that: The height limiting component (7) is a height-conforming sleeve, and the height-conforming sleeve is arranged on the pull rod (5) between the top plate (2) and the guide plate (3).

5. The permanent magnet motor magnetic steel removal tool according to claim 1 is characterized in that: The top column (9) passes through the guide hole (31) and is located between the jack (1) and the magnetic steel slot. The cross-sectional shape of the top column (9) is the shape of the magnetic steel slot minus the magnetic bridge portion.

6. The permanent magnet motor magnetic steel removal tooling according to claim 1 is characterized in that: The base (4) is placed on a bracket (10), the bracket (10) comprises an upper circular ring and a lower circular ring, the upper circular ring and the lower circular ring are connected via three columns, and the inner diameter of the upper circular ring is not less than the range of the rotor core (8) including the magnetic steel (81).

7. The permanent magnet motor magnetic steel removal tool according to claim 1 is characterized in that: The guide plate (3) is provided with at least one positioning pin 1, and the base (4) is provided with at least one positioning pin 2. The positions at which the positioning pin 1 and the positioning pin 2 are installed correspond to the positions of the ventilation holes (82) on the rotor core (8). The center of the guide plate (3) is provided with a first avoidance hole (32) for the rotating shaft (84) of the rotor core (8), and the center of the base (4) is provided with a second avoidance hole (44) for the rotating shaft (84) of the rotor core (8).

8. The permanent magnet motor magnetic steel removal tool according to any one of claims 1 to 7, characterized in that: Different mounting hole center positions correspond to force centers of different types of magnetic steel (81).

9. The permanent magnet motor magnetic steel removal tooling according to claim 8 is characterized in that: A magnetic steel (81) model identification is provided near each mounting hole of the top plate (2), and a pressure sensor (11) is installed at the top rod position of the jack (1).

10. The permanent magnet motor magnetic steel removal tool according to any one of claims 1 to 7, characterized in that: The center position of each mounting hole corresponds to the comprehensive force center of each group of magnetic steel (81), and a pressure sensor (11) is installed at the top rod position of the jack (1).

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