Centering magnetizing device of permanent magnet

Abstract

The utility model relates to the technical field of permanent magnet magnetizing, in particular to a centering magnetizing device of a permanent magnet, which comprises a first magnetizing mandrel, a lower guide sleeve, a magnetizing clamp and a second magnetizing mandrel, the lower guide sleeve is detachably mounted on a frame and provided with an inner circular surface and an outer circular surface which are coaxially arranged, the lower portion of the first magnetizing mandrel is matched with the inner circular surface, and the outer circular surface is matched with the outer circular surface. The upper portion of the first magnetizing core shaft is used for being sleeved with an annular permanent magnet, a clamping part is arranged in the magnetizing clamp, the lower portion of the magnetizing clamp is matched with the outer circle face, the first magnetizing core shaft extends into the clamping part, the annular permanent magnet is fixed in the clamping part, and the top end of the first magnetizing core shaft is connected with the second magnetizing core shaft and is coaxially arranged with the second magnetizing core shaft. The first magnetizing core shaft and the magnetizing clamp are coaxially arranged through the lower guide sleeve, the second magnetizing core shaft and the first magnetizing core shaft are coaxially arranged, the lower guide sleeve and the second magnetizing core shaft center the first magnetizing core shaft in the magnetizing process, and the magnetizing clamp is matched with the first magnetizing core shaft and the annular permanent magnet to center together.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet magnetization, in particular to a permanent magnet centering magnetization device. Background Art

[0002] In this field, when designing a magnetizing device, usually only the product magnetizing fixture part is designed, and the mechanism part is rarely considered. Even if some companies include the mechanism part when making the whole machine magnetizing equipment, it is only for the convenience of taking and placing the permanent magnet or permanent magnet rotor, and the centering problem in the product magnetization process is not considered. The angle fluctuation between the permanent magnets or rotor poles caused by uncentered magnetization is unstable, and there may be a problem of large fluctuation in the angle between the poles, which leads to large differences in the performance of each magnetic pole and relatively poor magnetic field uniformity.

[0003] At present, the industry basically does not consider whether the annular permanent magnet or permanent magnet rotor is concentric. The annular permanent magnet that is not centered and magnetized has an uneven magnetization gap, which leads to unstable angle fluctuations between the permanent magnet or rotor poles. Usually, the magnetic pole angle is about (360 / N)±2°, where N is the number of poles. The poor uniformity of the magnetic field per pole of the annular permanent magnet may cause jitter, noise, torque fluctuation and other problems during the operation of the motor. Utility Model Content

[0004] The purpose of the utility model is to provide a permanent magnet centering magnetization device to address the problems that the existing annular permanent magnets or permanent magnet rotors in the prior art are not centered during the magnetization process, the magnetization gap is uneven, and the magnetic field uniformity is relatively poor, which may cause jitter, noise, torque fluctuations and other problems during the operation of the motor.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] In the first aspect, the utility model provides a permanent magnet centering magnetizing device, comprising a first magnetizing core shaft, a lower guide sleeve, a magnetizing fixture and a second magnetizing core shaft, wherein the lower guide sleeve is detachably mounted on a frame, the lower guide sleeve has an inner circular surface and an outer circular surface arranged coaxially, the lower portion of the first magnetizing core shaft is matched with the inner circular surface, the upper portion of the first magnetizing core shaft is used for sleeve-mounting an annular permanent magnet, a clamping portion is provided in the magnetizing fixture, the lower portion of the magnetizing fixture is matched with the outer circular surface, the first magnetizing core shaft extends into the clamping portion, the annular permanent magnet is fixed in the clamping portion, and the top end of the first magnetizing core shaft is connected to the second magnetizing core shaft and arranged coaxially;

[0007] Alternatively, the lower portion of the second magnetizing core shaft is used to sleeve an annular permanent magnet, the second magnetizing core shaft extends into the clamping portion, the annular permanent magnet is fixed in the clamping portion, and the bottom end of the second magnetizing core shaft abuts against the first magnetizing core shaft and is coaxially arranged.

[0008] The permanent magnet centering magnetizing device described in the utility model is adopted, the first magnetizing core shaft and the magnetizing fixture are coaxially arranged through the lower guide sleeve, the second magnetizing core shaft is coaxially arranged with the first magnetizing core shaft, during the magnetizing process, the lower guide sleeve and the second magnetizing core shaft center the first magnetizing core shaft, the magnetizing fixture is adapted to the first magnetizing core shaft for centering together, a fixed filling space for the annular permanent magnet is formed between the first magnetizing core shaft or the second magnetizing core shaft and the clamping part, and the annular permanent magnet is adapted to the first magnetizing core shaft by the magnetizing fixture during the magnetizing process. The magnetic core shaft or the second magnetizing core shaft is centered. When the coaxiality of the permanent magnet itself is less than or equal to 0.1 mm, the magnetic pole angles of the magnetized permanent magnet or the permanent magnet rotor can be evenly controlled within the range of ±0.5°, which can effectively ensure the consistency of the magnetic flux of each pole after magnetization. The magnetic field formed by the permanent magnet in the motor is more uniform, the motor runs more smoothly, and the mechanical noise and electromagnetic noise are relatively smaller. The magnetizing fixtures of different specifications and sizes can be switched through the lower guide sleeve to ensure versatility without affecting production efficiency. The permanent magnet centering magnetizing device has a simple structure, is easy to use, and has a good effect.

[0009] As a preferred technical solution of the utility model, the lower part of the first magnetized core shaft has a protrusion, and the protrusion is matched with the top surface of the lower guide sleeve.

[0010] With this structure, the first magnetizing core shaft is matched with the top surface of the lower guide sleeve through the protrusion, that is, the first magnetizing core shaft is held by the lower guide sleeve, and the lower guide sleeve actually forms the lower limit of the first magnetizing core shaft, ensuring the accurate position of the first magnetizing core shaft.

[0011] As an optimal technical solution of the utility model, the magnetizing clamp includes a magnetizing clamp positioning plate and a magnetizing clamp body, the magnetizing clamp positioning plate is matched with the outer cylindrical surface, the magnetizing clamp body is connected to the magnetizing clamp positioning plate, and the clamping part is arranged in the magnetizing clamp body.

[0012] By adopting this structure, the magnetizing fixture positioning plate of fixed specifications and sizes can be used to cooperate with the lower guide sleeve. For the annular permanent magnets of different specifications and sizes, only the magnetizing fixture body of the corresponding specifications and sizes need to be replaced, and the form of each magnetizing fixture body connecting to the magnetizing fixture positioning plate remains consistent.

[0013] As a preferred technical solution of the utility model, a washer is sleeved on the first magnetized core shaft, and the washer supports the annular permanent magnet in the clamping part.

[0014] With this structure, the annular permanent magnet is supported in the clamping portion by the washer, so that the annular permanent magnet is completely located in the clamping portion, and the magnetization operation can be effectively performed.

[0015] As a preferred technical solution of the utility model, the first magnetized core shaft or the second magnetized core shaft is a magnetized core.

[0016] As an optimal technical solution of the utility model, a magnetizing clamp mounting plate is provided on the frame, a mounting hole is provided on the magnetizing clamp mounting plate, the lower guide sleeve passes through the mounting hole, the mounting hole cooperates with the outer cylindrical surface, and the lower guide sleeve protrudes from the outer cylindrical surface of the magnetizing clamp mounting plate and cooperates with the lower part of the magnetizing clamp.

[0017] As a preferred technical solution of the utility model, the lower end of the first magnetized core shaft is connected to the frame, and the upper end of the second magnetized core shaft is connected to the frame.

[0018] As a further preferred technical solution of the present invention, the lower end of the first magnetized core shaft is connected to the frame through a first lifting component, and the upper end of the second magnetized core shaft is connected to the frame through a second lifting component.

[0019] With this structure, the first magnetizing core shaft can be moved up and down on the frame through the first lifting component, that is, the upper part of the first magnetizing core shaft can be moved out of the clamping part, which is convenient for the annular permanent magnet to be installed on the first magnetizing core shaft, and the second magnetizing core shaft can be moved up and down on the frame through the second lifting component, cooperating with the movement of the first magnetizing core shaft, making displacement space for the first magnetizing core shaft and being able to support the first magnetizing core shaft.

[0020] As a preferred technical solution of the utility model, the bottom end of the second magnetized core shaft is a tip, the top end of the first magnetized core shaft is provided with a center hole, and the tip and the center hole cooperate with each other.

[0021] In the second aspect, the utility model also provides a centering magnetizing device for a permanent magnet, comprising a first magnetizing core shaft, a lower guide sleeve, a magnetizing clamp and a second magnetizing core shaft, wherein the lower guide sleeve is detachably mounted on a frame, the lower guide sleeve having an inner circular surface and an outer circular surface coaxially arranged, the lower portion of the first magnetizing core shaft being matched with the inner circular surface, a clamping portion being provided in the magnetizing clamp, the lower portion of the magnetizing clamp being matched with the outer circular surface, the clamping portion being used to set a rotor, the bottom end of the rotor shaft abutting against the top end of the first magnetizing core shaft and being coaxially arranged, and the top end of the rotor shaft abutting against the bottom end of the second magnetizing core shaft and being coaxially arranged.

[0022] The permanent magnet centering magnetizing device described in the utility model is adopted, the first magnetizing core shaft and the magnetizing fixture are coaxially arranged through the lower guide sleeve, the second magnetizing core shaft is coaxially arranged with the first magnetizing core shaft, during the magnetization process, the lower guide sleeve centers the first magnetizing core shaft, the magnetizing fixture is adapted to the first magnetizing core shaft for centering, the first magnetizing core shaft and the second magnetizing core shaft clamp the rotor in the clamping part, and the rotor is centered by the magnetizing fixture adapted to the first magnetizing core shaft and the second magnetizing core shaft during the magnetization process When the coaxiality of the permanent magnet on the rotor is less than or equal to 0.1 mm, the magnetic pole angles of the magnetized permanent magnet or the permanent magnet rotor can be uniformly controlled within the range of ±0.5°, which can effectively ensure the consistency of the magnetic flux of each pole after magnetization. The magnetic field formed by the permanent magnet in the motor is more uniform, the motor runs more smoothly, and the mechanical noise and electromagnetic noise are relatively smaller; the magnetizing fixtures of different specifications and sizes can be switched through the lower guide sleeve to ensure versatility without affecting the production efficiency; the permanent magnet centering magnetizing device has a simple structure, is easy to use, and has a good effect.

[0023] As a preferred technical solution of the utility model, both ends of the rotor shaft are respectively provided with a center hole, and the abutting ends of the first magnetized core shaft and the second magnetized core shaft are both tips, and the tips cooperate with the center hole;

[0024] Alternatively, a center hole is provided at the top of the rotor shaft, a bearing position is provided at the bottom of the rotor shaft, the abutting end of the second magnetized core shaft is a top, the abutting end of the first magnetized core shaft is an assembly hole, the top cooperates with the center hole, and the rotor shaft provided with the bearing position cooperates with the assembly hole;

[0025] Alternatively, a center hole is provided at the bottom end of the rotor shaft, a bearing position is provided at the top of the rotor shaft, the abutting end of the second magnetized core shaft is an assembly hole, the abutting end of the first magnetized core shaft is a top, the top cooperates with the center hole, and the rotor shaft provided with the bearing position cooperates with the assembly hole;

[0026] Alternatively, the top and bottom of the rotor shaft are respectively provided with bearing positions, the abutting ends of the first magnetized core shaft and the second magnetized core shaft are both assembly holes, and the rotor shaft cooperates with the assembly holes.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0028] 1. A permanent magnet centering magnetizing device described in the utility model, wherein the first magnetizing core shaft and the magnetizing fixture are coaxially arranged through the lower guide sleeve, and the second magnetizing core shaft is coaxially arranged with the first magnetizing core shaft. During the magnetization process, the lower guide sleeve and the second magnetizing core shaft center the first magnetizing core shaft, and the magnetizing fixture is adapted to the first magnetizing core shaft for centering together. A fixed filling space for the annular permanent magnet is formed between the first magnetizing core shaft or the second magnetizing core shaft and the clamping portion. During the magnetization process, the annular permanent magnet is centered by the magnetizing fixture adapted to the first magnetizing core shaft or the second magnetizing core shaft. When the coaxiality of the permanent magnet itself is less than or equal to 0.1 mm, the magnetic pole angles of the magnetized permanent magnet or the permanent magnet rotor can be uniformly controlled within the range of ±0.5°, which can effectively ensure the consistency of the magnetic flux of each pole after magnetization, and the magnetic field formed by the permanent magnet in the motor is more uniform, the motor runs more smoothly, and the mechanical noise and electromagnetic noise are relatively smaller;

[0029] 2. The permanent magnet centering magnetizing device described in the utility model can switch the magnetizing fixtures of different specifications and sizes through the lower guide sleeve, thereby ensuring versatility and not affecting production efficiency; the permanent magnet centering magnetizing device has a simple structure, is easy to use, and has a good effect;

[0030] 3. The centering magnetizing device of a permanent magnet described in the utility model, the first magnetizing core shaft and the magnetizing fixture are coaxially arranged through the lower guide sleeve, the second magnetizing core shaft is coaxially arranged with the first magnetizing core shaft, during the magnetizing process, the lower guide sleeve centers the first magnetizing core shaft, the magnetizing fixture is adapted to the first magnetizing core shaft for centering, the first magnetizing core shaft and the second magnetizing core shaft clamp the rotor in the clamping part, and the rotor is centered by the magnetizing fixture adapted to the first magnetizing core shaft and the second magnetizing core shaft during the magnetizing process When the coaxiality of the permanent magnet on the rotor is less than or equal to 0.1 mm, the magnetic pole angles of the magnetized permanent magnet or the permanent magnet rotor can be uniformly controlled within the range of ±0.5°, which can effectively ensure the consistency of the magnetic flux of each pole after magnetization. The magnetic field formed by the permanent magnet in the motor is more uniform, the motor runs more smoothly, and the mechanical noise and electromagnetic noise are relatively smaller; the magnetizing fixtures of different specifications and sizes can be switched through the lower guide sleeve to ensure versatility without affecting the production efficiency; the permanent magnet centering magnetizing device has a simple structure, is easy to use, and has a good effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the centering magnetization device of the permanent magnet in Example 1;

[0032] Figure 2 It is a structural schematic diagram of the centering magnetization device of the permanent magnet in Example 2;

[0033] Figure 3 It is a structural schematic diagram of the centering magnetization device of the permanent magnet in Example 3;

[0034] Figure 4 It is a structural schematic diagram of the centering magnetization device of the permanent magnet in Example 4;

[0035] Figure 5 It is a structural schematic diagram of the centering magnetization device of the permanent magnet in Example 5;

[0036] Figure 6 This is a schematic diagram of the structure of the centering magnetization device of the permanent magnet in Example 6.

[0037] Markings in the figure: 1-first magnetizing core shaft, 2-lower guide sleeve, 3-magnetizing fixture mounting plate, 4-washer, 5-annular permanent magnet, 6-magnetizing fixture, 61-magnetizing fixture positioning plate, 62-magnetizing fixture body, 7-second magnetizing core shaft, 8-rotor. DETAILED DESCRIPTION

[0038] The utility model is described in detail below in conjunction with the accompanying drawings.

[0039] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0040] In the related art, during the magnetization process, the permanent magnet or permanent magnet rotor is not centered, and the angle fluctuation between the magnetic poles of the permanent magnet or rotor magnetized without centering is unstable, and there may be a problem of large fluctuation of the angle between the poles, which leads to large differences in the performance of each magnetic pole and relatively poor magnetic field uniformity. Figures 1 to 6 To elaborate.

[0041] Example 1

[0042] like Figure 1 As shown, a permanent magnet centering magnetizing device described in the utility model includes a frame, a first lifting component, a second lifting component, a first magnetizing core shaft 1, a lower guide sleeve 2, a magnetizing fixture mounting plate 3, a gasket 4, a magnetizing fixture 6 and a second magnetizing core shaft 7.

[0043] The magnetizing fixture mounting plate 3 , the first lifting component and the second lifting component are mounted on the frame, and the magnetizing fixture mounting plate 3 is provided with mounting holes.

[0044] The lower guide sleeve 2 can be detachably mounted on the magnetizing fixture mounting plate 3. Specifically, the lower guide sleeve 2 is a step structure, and has an inner circular surface and an outer circular surface arranged coaxially. The lower guide sleeve 2 passes through the mounting hole from bottom to top, and the mounting hole is matched with the outer circular surface. The step surface of the lower guide sleeve 2 is attached to the lower surface of the magnetizing fixture mounting plate 3, and the outer circular surface protrudes from the upper surface of the magnetizing fixture mounting plate 3.

[0045] The first magnetized core shaft 1 is a magnetized core, and the lower part of the first magnetized core shaft 1 has a boss, the first magnetized core shaft 1 below the boss is matched with the inner circular surface, the boss is matched with the top surface of the lower guide sleeve 2, and the first magnetized core shaft 1 above the boss is sleeved with the washer 4 and the annular permanent magnet 5. With this structure, the first magnetized core shaft 1 is matched with the top surface of the lower guide sleeve 2 through the boss, that is, the first magnetized core shaft 1 is held by the lower guide sleeve 2, and the lower guide sleeve 2 actually forms the lower limit of the first magnetized core shaft 1, ensuring the accurate position of the first magnetized core shaft 1.

[0046] The magnetizing fixture 6 is an annular structure, such as a circular ring, and the magnetizing fixture 6 includes a magnetizing fixture positioning plate 61 and a magnetizing fixture body 62. The outer cylindrical surface of the lower guide sleeve 2 protruding from the magnetizing fixture mounting plate 3 cooperates with the magnetizing fixture positioning plate 61, that is, the magnetizing fixture positioning plate 61 is sleeved outside the lower guide sleeve 2, and the lower surface of the magnetizing fixture positioning plate 61 fits the upper surface of the magnetizing fixture mounting plate 3, and the magnetizing fixture body 62 is connected to the magnetizing fixture positioning plate 61, and the hollow part of the magnetizing fixture body 62 is a clamping part. With this structure, the magnetizing fixture positioning plate 61 of fixed specifications and sizes can be used to match the lower guide sleeve 2. For the annular permanent magnets 5 of different specifications and sizes, only the magnetizing fixture body 62 of the corresponding specifications and sizes needs to be replaced, and the form of each magnetizing fixture body 62 connecting the magnetizing fixture positioning plate 61 remains consistent.

[0047] The size of the boss is smaller than that of the clamping portion, the first magnetizing core shaft 1 extends into the clamping portion, the washer 4 supports the annular permanent magnet 5 in the clamping portion, the annular permanent magnet 5 is fixed in the clamping portion, and the top end of the first magnetizing core shaft 1 is connected to the second magnetizing core shaft 7 and is coaxially arranged. With this structure, the annular permanent magnet 5 is supported in the clamping portion by the washer 4, so that the annular permanent magnet 5 is completely located in the clamping portion, and the magnetization operation can be effectively performed.

[0048] The lower end of the first magnetizing core shaft 1 is connected to the frame through the first lifting component, and the upper end of the second magnetizing core shaft 7 is connected to the frame through the second lifting component. Specifically, the first lifting component is a hydraulic cylinder, a pneumatic cylinder or an electric cylinder, and the second lifting component is a hydraulic cylinder, a pneumatic cylinder or an electric cylinder. With this structure, the first magnetizing core shaft 1 can be moved up and down on the frame through the first lifting component, that is, the upper part of the first magnetizing core shaft 1 can be moved out of the clamping part, which is convenient for the annular permanent magnet 5 to be installed on the first magnetizing core shaft 1. The second magnetizing core shaft 7 can be moved up and down on the frame through the second lifting component, and cooperate with the movement of the first magnetizing core shaft 1 to make displacement space for the first magnetizing core shaft 1 and can support the first magnetizing core shaft 1. Specifically, the bottom end of the second magnetizing core shaft 7 is a top, and the top end of the first magnetizing core shaft 1 is provided with a center hole, and the top and the center hole cooperate.

[0049] In some other implementations, the top end of the first magnetized core shaft 1 may be a tip, and the bottom end of the second magnetized core shaft 7 may be provided with a center hole, and the tip and the center hole may fit together.

[0050] Workflow:

[0051] In the initial state, the first magnetized core shaft 1 is located at the lower limit position, that is, the protrusion of the first magnetized core shaft 1 is attached to the lower guide sleeve 2, and the second magnetized core shaft 7 is located at the upper limit position, that is, the second magnetized core shaft 7 is located at the minimum stroke of the second lifting component, and the second lifting component lifts the second magnetized core shaft 7.

[0052] Then, the first lifting component drives the first magnetizing core shaft 1 upward to the upper limit position, that is, the first lifting component drives the first magnetizing core shaft 1 to at least partially extend or entirely extend out of the clamping portion of the magnetizing clamp 6, and the washer 4 and the annular permanent magnet 5 are sequentially mounted on the first magnetizing core shaft 1.

[0053] The first lifting component drives the first magnetized core shaft 1 downward to the lower limit position, and the second lifting component drives the second magnetized core shaft 7 downward to support the top end of the first magnetized core shaft 1.

[0054] The magnetizer discharges to magnetize the annular permanent magnet 5 .

[0055] The second lifting component drives the second magnetized core shaft 7 upward to the upper limit position, and the first lifting component drives the first magnetized core shaft 1 upward to the upper limit position to take out the annular permanent magnet 5.

[0056] The above-mentioned actions are repeated to complete the magnetization of the batch of annular permanent magnets 5 , and the gasket 4 is taken out, and the first magnetization core shaft 1 and the second magnetization core shaft 7 are reset to the initial state.

[0057] To complete the magnetization of the annular permanent magnets 5 of different specifications and sizes, it is only necessary to replace the corresponding magnetization fixture body 62 .

[0058] The permanent magnet centering magnetization device described in this embodiment is characterized in that the first magnetizing core shaft 1 and the magnetizing fixture 6 are coaxially arranged through the lower guide sleeve 2, and the second magnetizing core shaft 7 is coaxially arranged with the first magnetizing core shaft 1. During the magnetization process, the lower guide sleeve 2 and the second magnetizing core shaft 7 center the first magnetizing core shaft 1, and the magnetizing fixture 6 is adapted to the first magnetizing core shaft 1 for centering together. A fixed filling space for the annular permanent magnet 5 is formed between the first magnetizing core shaft 1 and the clamping portion, and the annular permanent magnet 5 is adapted to the magnetizing fixture 6 during the magnetization process. The first magnetizing core shaft 1 is centered. When the coaxiality of the permanent magnet itself is less than or equal to 0.1 mm, the magnetic pole angles of the magnetized permanent magnet or the permanent magnet rotor can be evenly controlled within the range of ±0.5°, which can effectively ensure the consistency of the magnetic flux of each pole after magnetization. The magnetic field formed by the permanent magnet in the motor is more uniform, the motor runs more smoothly, and the mechanical noise and electromagnetic noise are relatively smaller; the magnetizing fixture 6 of different specifications and sizes can be switched through the lower guide sleeve 2 to ensure versatility without affecting the production efficiency; the permanent magnet centering magnetizing device has a simple structure, is easy to use, and has a good effect.

[0059] Example 2

[0060] like Figure 2 As shown, a permanent magnet centering magnetizing device described in the utility model is different from Example 1 in that, in this embodiment, the lower part of the second magnetizing core shaft 7 is used to sleeve the annular permanent magnet 5, the second magnetizing core shaft 7 extends into the clamping part, the annular permanent magnet 5 is fixed in the clamping part, the bottom end of the second magnetizing core shaft 7 abuts against the first magnetizing core shaft 1 and is coaxially arranged, and the second magnetizing core shaft 7 is a magnetizing core.

[0061] The permanent magnet centering magnetizing device described in this embodiment is characterized in that the first magnetizing core shaft 1 and the magnetizing fixture 6 are coaxially arranged through the lower guide sleeve 2, and the second magnetizing core shaft 7 is coaxially arranged with the first magnetizing core shaft 1. During the magnetization process, the lower guide sleeve 2 and the second magnetizing core shaft 7 center the first magnetizing core shaft 1, and the magnetizing fixture 6 is adapted to the first magnetizing core shaft 1 for centering together. A fixed filling space for the annular permanent magnet 5 is formed between the second magnetizing core shaft 7 and the clamping portion. During the magnetization process, the annular permanent magnet 5 is centered by the magnetizing fixture 6 and the second magnetizing core shaft 7. When the coaxiality of the permanent magnet itself is less than or equal to 0.1 mm, the magnetic pole angles of the magnetized permanent magnet or the permanent magnet rotor can be uniformly controlled within the range of ±0.5°, which can effectively ensure the consistency of the magnetic flux of each pole after magnetization, and the magnetic field formed by the permanent magnet in the motor is more uniform. The motor runs more smoothly, and the mechanical noise and electromagnetic noise are relatively smaller.

[0062] Example 3

[0063] like Figure 3 As shown, a permanent magnet centering magnetizing device described in the utility model includes a frame, a first lifting component, a second lifting component, a first magnetizing core shaft 1, a lower guide sleeve 2, a magnetizing fixture mounting plate 3, a magnetizing fixture 6 and a second magnetizing core shaft 7.

[0064] The magnetizing fixture mounting plate 3 , the first lifting component and the second lifting component are mounted on the frame, and the magnetizing fixture mounting plate 3 is provided with mounting holes.

[0065] The lower guide sleeve 2 can be detachably mounted on the magnetizing fixture mounting plate 3. Specifically, the lower guide sleeve 2 is a step structure, and has an inner circular surface and an outer circular surface arranged coaxially. The lower guide sleeve 2 passes through the mounting hole from bottom to top, and the mounting hole is matched with the outer circular surface. The step surface of the lower guide sleeve 2 is attached to the lower surface of the magnetizing fixture mounting plate 3, and the outer circular surface protrudes from the upper surface of the magnetizing fixture mounting plate 3.

[0066] The first magnetized core shaft 1 has a boss at the bottom, and the first magnetized core shaft 1 below the boss is matched with the inner circular surface, and the boss is matched with the top surface of the lower guide sleeve 2. With this structure, the first magnetized core shaft 1 is matched with the top surface of the lower guide sleeve 2 through the boss, that is, the first magnetized core shaft 1 is held by the lower guide sleeve 2, and the lower guide sleeve 2 actually forms the lower limit of the first magnetized core shaft 1, ensuring the accurate position of the first magnetized core shaft 1.

[0067] A clamping portion is provided inside the magnetizing fixture 6, and the lower portion of the magnetizing fixture 6 cooperates with the outer cylindrical surface. The clamping portion is used to set the rotor 8. The bottom end of the rotor 8 shaft abuts against the top end of the first magnetizing core shaft 1 and is coaxially arranged, and the top end of the rotor 8 shaft abuts against the bottom end of the second magnetizing core shaft 7 and is coaxially arranged, wherein a permanent magnet ring is mounted outside the rotor 8 shaft.

[0068] In a specific embodiment, the magnetizing fixture 6 is an annular structure, such as a circular ring, and the magnetizing fixture 6 includes a magnetizing fixture positioning plate 61 and a magnetizing fixture body 62. The outer cylindrical surface of the lower guide sleeve 2 protruding from the magnetizing fixture mounting plate 3 cooperates with the magnetizing fixture positioning plate 61, that is, the magnetizing fixture positioning plate 61 is sleeved outside the lower guide sleeve 2, and the lower surface of the magnetizing fixture positioning plate 61 is in contact with the upper surface of the magnetizing fixture mounting plate 3, and the magnetizing fixture body 62 is connected to the magnetizing fixture positioning plate 61, and the hollow part of the magnetizing fixture body 62 is the clamping part. With this structure, the magnetizing fixture positioning plate 61 of fixed specifications and sizes can be used to match the lower guide sleeve 2. For the rotors 8 of different specifications and sizes, only the magnetizing fixture body 62 of the corresponding specifications and sizes need to be replaced, and the form of each magnetizing fixture body 62 connecting the magnetizing fixture positioning plate 61 remains consistent.

[0069] The lower end of the first magnetized core shaft 1 is connected to the frame through the first lifting component, and the upper end of the second magnetized core shaft 7 is connected to the frame through the second lifting component. Specifically, the first lifting component is a hydraulic cylinder, a pneumatic cylinder or an electric cylinder, and the second lifting component is a hydraulic cylinder, a pneumatic cylinder or an electric cylinder. With this structure, the first magnetized core shaft 1 can be moved up and down on the frame through the first lifting component, that is, the upper part of the first magnetized core shaft 1 can be moved out of the clamping part, which is convenient for the rotor 8 to be docked to the first magnetized core shaft 1. The second magnetized core shaft 7 can be moved up and down on the frame through the second lifting component, and cooperate with the movement of the first magnetized core shaft 1 to make displacement space for the first magnetized core shaft 1 and can support the first magnetized core shaft 1. Specifically, both ends of the rotor 8 shaft are provided with center holes, and the abutting ends of the first magnetized core shaft 1 and the second magnetized core shaft 7 are both tops, and the tops are matched with the center holes.

[0070] The permanent magnet centering magnetization device described in this embodiment is configured such that the first magnetizing core shaft 1 and the magnetizing fixture 6 are coaxially arranged through the lower guide sleeve 2, and the second magnetizing core shaft 7 is coaxially arranged with the first magnetizing core shaft 1. During the magnetization process, the lower guide sleeve 2 centers the first magnetizing core shaft 1, and the magnetizing fixture 6 is adapted to the first magnetizing core shaft 1 for centering together. The first magnetizing core shaft 1 and the second magnetizing core shaft 7 clamp the rotor 8 in the clamping portion. During the magnetization process, the rotor 8 is adapted to the first magnetizing core shaft 1 and the second magnetizing core shaft 7 by the magnetizing fixture 6. The magnetic core shaft 7 is centered. When the coaxiality of the permanent magnet on the rotor 8 is less than or equal to 0.1 mm, the magnetic pole angles of the magnetized permanent magnet or the permanent magnet rotor can be evenly controlled within the range of ±0.5°, which can effectively ensure the consistency of the magnetic flux of each pole after magnetization. The magnetic field formed by the permanent magnet in the motor is more uniform, the motor runs more smoothly, and the mechanical noise and electromagnetic noise are relatively smaller. The magnetizing fixtures of different specifications and sizes can be switched through the lower guide sleeve to ensure versatility without affecting the production efficiency. The centering magnetizing device of the permanent magnet has a simple structure, is easy to use, and has a good effect.

[0071] Example 4

[0072] like Figure 4 As shown, a permanent magnet centering magnetizing device described in the utility model is different from Example 3 in that, in this embodiment, a center hole is provided at the top of the rotor 8 shaft, a bearing position is provided at the bottom of the rotor 8 shaft, the abutting end of the second magnetizing core shaft 7 is a top point, and the abutting end of the first magnetizing core shaft 1 is an assembly hole, the top point cooperates with the center hole, and the rotor 8 shaft provided with the bearing position cooperates with the assembly hole.

[0073] Since the machining accuracy of the bearing position of the rotor 8 shaft is very high, the cooperation between the top and the center hole can be achieved through the cooperation between the bearing position and the assembly hole, so that the first magnetized core shaft 1, the rotor 8 shaft and the second magnetized core shaft 7 are coaxially arranged.

[0074] Example 5

[0075] like Figure 5 As shown, a permanent magnet centering magnetizing device described in the utility model is different from Example 3 or Example 4 in that, in this embodiment, a center hole is provided at the bottom end of the rotor 8 shaft, a bearing position is provided at the top of the rotor 8 shaft, the abutting end of the second magnetizing core shaft 7 is an assembly hole, and the abutting end of the first magnetizing core shaft 1 is a top point, the top point cooperates with the center hole, and the rotor 8 shaft provided with the bearing position cooperates with the assembly hole.

[0076] Example 6

[0077] like Figure 6 As shown, a permanent magnet centering magnetizing device described in the utility model is different from any one of Examples 3 to 5 in that, in this embodiment, the top and bottom of the rotor 8 shaft are respectively provided with bearing positions, and the abutting ends of the first magnetizing core shaft 1 and the second magnetizing core shaft 7 are both assembly holes, and the rotor 8 shaft cooperates with the assembly holes.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A permanent magnet centering magnetization device, characterized in that: The invention comprises a first magnetizing core shaft (1), a lower guide sleeve (2), a magnetizing clamp (6) and a second magnetizing core shaft (7), wherein the lower guide sleeve (2) is detachably mounted on a frame, the lower guide sleeve (2) has an inner circular surface and an outer circular surface which are coaxially arranged, the lower part of the first magnetizing core shaft (1) is matched with the inner circular surface, the upper part of the first magnetizing core shaft (1) is used for sleeve-mounting an annular permanent magnet (5), a clamping part is arranged inside the magnetizing clamp (6), the lower part of the magnetizing clamp (6) is matched with the outer circular surface, the first magnetizing core shaft (1) extends into the clamping part, the annular permanent magnet (5) is fixed in the clamping part, and the top end of the first magnetizing core shaft (1) abuts against the second magnetizing core shaft (7) and is coaxially arranged; Alternatively, the lower part of the second magnetizing core shaft (7) is used to sleeve the annular permanent magnet (5), the second magnetizing core shaft (7) extends into the clamping portion, the annular permanent magnet (5) is fixed in the clamping portion, and the bottom end of the second magnetizing core shaft (7) abuts against the first magnetizing core shaft (1) and is coaxially arranged.

2. The permanent magnet centering magnetization device according to claim 1, characterized in that: The first magnetized core shaft (1) has a protrusion at the bottom, and the protrusion is matched with the top surface of the lower guide sleeve (2).

3. The permanent magnet centering magnetization device according to claim 1, characterized in that: The magnetizing clamp (6) comprises a magnetizing clamp positioning plate (61) and a magnetizing clamp body (62), wherein the magnetizing clamp positioning plate (61) is matched with the outer cylindrical surface, the magnetizing clamp body (62) is connected to the magnetizing clamp positioning plate (61), and the clamping portion is arranged in the magnetizing clamp body (62).

4. The permanent magnet centering magnetization device according to claim 1, characterized in that: A washer (4) is sleeved on the first magnetized core shaft (1), and the washer (4) supports the annular permanent magnet (5) in the clamping portion.

5. The permanent magnet centering magnetization device according to claim 1, characterized in that: The first magnetized core shaft (1) or the second magnetized core shaft (7) is a magnetized core.

6. The permanent magnet centering magnetization device according to claim 1, characterized in that: A magnetizing fixture mounting plate (3) is provided on the frame, a mounting hole is provided on the magnetizing fixture mounting plate (3), the lower guide sleeve (2) passes through the mounting hole, the mounting hole is matched with the outer cylindrical surface, and the lower guide sleeve (2) protrudes from the outer cylindrical surface of the magnetizing fixture mounting plate (3) and matches with the lower part of the magnetizing fixture (6).

7. The permanent magnet centering and magnetizing device according to any one of claims 1 to 6, characterized in that: The lower end of the first magnetized core shaft (1) is connected to the frame, and the upper end of the second magnetized core shaft (7) is connected to the frame.

8. The permanent magnet centering magnetization device according to claim 7, characterized in that: The lower end of the first magnetized core shaft (1) is connected to the frame via a first lifting component, and the upper end of the second magnetized core shaft (7) is connected to the frame via a second lifting component.

9. A permanent magnet centering magnetization device, characterized in that: The invention comprises a first magnetizing core shaft (1), a lower guide sleeve (2), a magnetizing clamp (6) and a second magnetizing core shaft (7), wherein the lower guide sleeve (2) is detachably mounted on a frame, the lower guide sleeve (2) has an inner cylindrical surface and an outer cylindrical surface which are coaxially arranged, the lower part of the first magnetizing core shaft (1) is matched with the inner cylindrical surface, a clamping part is arranged inside the magnetizing clamp (6), the lower part of the magnetizing clamp (6) is matched with the outer cylindrical surface, the clamping part is used to set a rotor (8), the bottom end of the rotor (8) shaft abuts against the top end of the first magnetizing core shaft (1) and is coaxially arranged, and the top end of the rotor (8) shaft abuts against the bottom end of the second magnetizing core shaft (7) and is coaxially arranged.

10. The permanent magnet centering magnetization device according to claim 9, characterized in that: The two ends of the rotor (8) shaft are respectively provided with a center hole, and the abutting ends of the first magnetized core shaft (1) and the second magnetized core shaft (7) are both tips, and the tips are matched with the center hole; Alternatively, a center hole is provided at the top of the rotor (8) shaft, a bearing position is provided at the bottom of the rotor (8) shaft, the abutting end of the second magnetized core shaft (7) is a tip, the abutting end of the first magnetized core shaft (1) is an assembly hole, the tip cooperates with the center hole, and the rotor (8) shaft provided with the bearing position cooperates with the assembly hole; Alternatively, a center hole is provided at the bottom end of the rotor (8) shaft, a bearing position is provided at the top of the rotor (8) shaft, the abutting end of the second magnetized core shaft (7) is an assembly hole, the abutting end of the first magnetized core shaft (1) is a top end, the top end cooperates with the center hole, and the rotor (8) shaft provided with the bearing position cooperates with the assembly hole; Alternatively, the top and bottom of the rotor (8) shaft are respectively provided with bearing positions, and the abutting ends of the first magnetized core shaft (1) and the second magnetized core shaft (7) are both assembly holes, and the rotor (8) shaft cooperates with the assembly holes.

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