Rotor magnetizing mechanism
By designing a rotor magnetization mechanism, the positioning pins of the sliding and lifting components are used to achieve personalized magnetization of the core components, solving the torque pulsation problem caused by the same magnetization angle of the core components, and improving the stability and efficiency of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN JINMINJIANG RIVER MECHANICAL & ELECTRICAL EQUIP
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-05
AI Technical Summary
The magnetization angle of the iron core assembly of the existing motor rotor is the same, which leads to large torque pulsation.
Design a rotor magnetization mechanism that combines a sliding component and a lifting component, and uses positioning pins set at different angles to make the iron core component have different angles during magnetization, so as to realize personalized magnetization of the iron core component.
It effectively reduces tooth harmonics, lowers torque pulsation, and improves motor operating stability and efficiency.
Smart Images
Figure CN224329345U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of motor manufacturing, and more specifically, relates to a rotor magnetization mechanism. Background Technology
[0002] Some motor rotors include a shaft and multiple core assemblies, which are sequentially mounted on the shaft along its axial direction to increase power density. Each core assembly typically consists of a rotor core and magnets; magnet slots are provided on the rotor core, and magnets are installed within these slots. After the magnets are installed in the slots, the core assembly needs to be magnetized to impart magnetism to the magnets.
[0003] However, after the existing multiple iron core components are magnetized, the magnetization angle of each iron core component is the same, which results in large torque pulsation in the motor rotor. Utility Model Content
[0004] The purpose of this application is to provide a rotor magnetization mechanism to solve the technical problem of identical magnetization angles of core components in related technologies.
[0005] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:
[0006] A rotor magnetization mechanism is provided, comprising:
[0007] A sliding assembly includes a work plate, a sliding drive member, and a slide rail extending along a first direction. The work plate has two or more workstations spaced apart along the first direction. The sliding drive member is used to drive the work plate to slide along the slide rail.
[0008] A magnetization assembly includes a magnetization bracket and a magnetization head, wherein the magnetization head is mounted on the magnetization bracket and is located above the slide rail;
[0009] Two or more lifting components are provided, each of which is installed below one of the workstations. Each lifting component includes a lifting drive, a support base, and a positioning pin. The support base is movably disposed in the corresponding workstation, and the positioning pin protrudes from the support base and is used to position and embed itself in the iron core assembly. The positioning pins of different lifting components are set at different angles on the support base. The lifting drive is installed on the work plate and is used to drive the support base to perform lifting and lowering movements so that the iron core assembly located on the support base enters the magnetizing head.
[0010] In one embodiment, the positioning pins of different lifting components are sequentially deflected along the first direction at a preset angle.
[0011] In one embodiment, the preset angle is 3° to 8°.
[0012] In one embodiment, the lifting assembly further includes a coaxial limiting block, which is mounted on the top of the support base, and the outer diameter of the coaxial limiting block matches the inner diameter of the core assembly.
[0013] In one embodiment, the number of positioning pins in each lifting component is two or more, and they are distributed circumferentially at intervals along the coaxial limiting block.
[0014] In one embodiment, the lifting assembly further includes a guide sleeve, which is mounted on the work plate and coaxially arranged with the corresponding work station. The guide sleeve is used to movably sleeve the lifting shaft of the lifting drive component.
[0015] In one embodiment, the inner wall of the guide sleeve has a first positioning groove, the lifting shaft of the lifting drive has a second positioning groove, and the lifting assembly further includes a key plate, which is respectively embedded in the first positioning groove and the second positioning groove.
[0016] In one embodiment, the lifting shaft of the lifting drive has a first positioning plane, and the guide sleeve has a positioning notch, the positioning notch and the first positioning plane being located in the same radial direction as the lifting shaft of the lifting drive.
[0017] In one embodiment, the rotor magnetizing mechanism further includes a lifting mounting frame, on which all the lifting drive components are spaced apart along the first direction. The lifting mounting frame is located below the working plate and is fixedly mounted to the working plate by multiple mounting columns.
[0018] In one embodiment, the lifting assembly further includes a buffer, which is fixedly mounted on the fixed portion of the lifting drive, and the output end of the buffer is connected to the lifting shaft of the lifting drive.
[0019] In one embodiment, the buffer and the lifting drive are arranged side by side.
[0020] In one embodiment, each of the lifting drive members corresponds to two of the buffers, which are located on opposite sides of the lifting shaft of the lifting drive member.
[0021] In one embodiment, the rotor magnetizing mechanism further includes a plurality of first position detection sensors distributed at intervals along the first direction, each workstation corresponding to one first position detection sensor, and the first position detection sensor being used to detect whether the workstation is placed on the core assembly.
[0022] In one embodiment, the magnetizing head is mounted on the magnetizing bracket via a magnetizing drive, the magnetizing drive being used to drive the magnetizing head to move up and down.
[0023] The rotor magnetizing mechanism provided in this application embodiment has at least the following beneficial effects: two or more iron core assemblies are respectively placed on the support seats of different lifting assemblies. The positioning pins protruding from the support seats are embedded in the iron core assemblies to prevent the iron core assemblies from rotating on the support seats, thereby guiding and limiting the placement angle of the iron core assemblies. Subsequently, the two or more iron cores slide along the first direction with the working plate to the bottom of the magnetizing head. The lifting drive drives the support seats to rise and enter the magnetizing head for magnetization. Since the positioning pins of different lifting assemblies have different setting angles relative to the support seats, the placement angles of the iron core assemblies located on different support seats are different, that is, the magnetization angles are different. This solves the technical problem of the same magnetization angle of the iron core assemblies in related technologies. After magnetization, the two or more iron core assemblies are assembled onto the rotating shaft in sequence, effectively reducing tooth harmonics and torque pulsation. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the operation of the rotor magnetization mechanism provided in the embodiments of this application;
[0026] Figure 2 A schematic diagram showing the arrangement of two or more support bases, locating pins, and coaxial limit blocks;
[0027] Figure 3 This is a schematic diagram of the rotor magnetization mechanism provided in the embodiments of this application after removing the magnetization components;
[0028] Figure 4 for Figure 3 Top view;
[0029] Figure 5 An exploded view of the lifting assembly of the rotor magnetization mechanism provided in an embodiment of this application.
[0030] The main markings in the attached figures are as follows:
[0031] X, first direction; Y, second direction; Z, vertical direction;
[0032] 10. Iron core assembly;
[0033] 100. Sliding assembly; 110. Work plate; 111. Workstation; 120. Sliding drive component; 130. Slide rail;
[0034] 200. Magnetizing assembly; 210. Magnetizing bracket; 220. Magnetizing head; 230. Magnetizing drive component;
[0035] 300. Lifting assembly; 310. Lifting drive component; 311. Lifting shaft; 312. Second positioning groove; 313. First positioning plane; 320. Support base; 330. Positioning pin; 340. Coaxial limiting block; 350. Guide sleeve; 351. First positioning groove; 352. Positioning notch; 360. Key plate; 370. Buffer; 380. Crossbar;
[0036] 410. Lifting mounting bracket; 411. Mounting column; 420. First position detection sensor. Detailed Implementation
[0037] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0038] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.
[0040] In the description of this application, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0042] Throughout this specification, references to "an embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, particular features, structures, or characteristics may be combined in any suitable manner.
[0043] Please see Figure 1 and Figure 2 The rotor magnetizing mechanism provided in the embodiments of this application will now be described. The rotor magnetizing mechanism includes a sliding assembly 100, a magnetizing assembly 200, and two or more lifting assemblies 300.
[0044] The sliding assembly 100 includes a work plate 110, a sliding drive 120, and a slide rail 130 extending along a first direction X. The work plate 110 has two or more workstations 111 spaced apart along the first direction X. The sliding drive 120 drives the work plate 110 to slide along the slide rail 130. The magnetizing assembly 200 includes a magnetizing bracket 210 and a magnetizing head 220. The magnetizing head 220 is mounted on the magnetizing bracket 210 and is located above the slide rail 130.
[0045] Each lifting assembly 300 is installed below a workstation 111. The lifting assembly 300 includes a lifting drive 310, a support base 320, and a positioning pin 330. The support base 320 is movably disposed in the corresponding workstation 111. The positioning pin 330 protrudes from the support base 320 and is used to position and embed itself in the iron core assembly 10. The positioning pin 330 of different lifting assemblies has a different setting angle on the support base 320. The lifting drive 310 is installed on the work plate 110 and is used to drive the support base 320 to perform lifting and lowering movements so that the iron core assembly 10 located on the support base 320 enters the magnetizing head 220.
[0046] Specifically, two or more core assemblies 10 are placed on support seats 320 of different lifting assemblies 300. Positioning pins 330 protruding from the support seats 320 are embedded in the core assemblies 10 to prevent rotation on the support seats 320, thus guiding and limiting the placement angle of the core assemblies 10. Subsequently, the two or more cores slide along the first direction X with the working plate 110 to below the magnetizing head 220. The lifting drive 310 drives the support seats 320 to rise and enter the magnetizing head 220 for magnetization. Because the positioning pins 330 of different lifting assemblies 300 have different angles relative to the support seats 320, the placement angles of the core assemblies 10 located on different support seats 320 are different, i.e., the magnetization angles are different. This solves the technical problem of identical magnetization angles for core assemblies 10 in related technologies. After magnetization, the two or more core assemblies 10 are sequentially fitted and assembled onto the rotating shaft, effectively reducing tooth harmonics and torque pulsation.
[0047] It should be noted that the rotor magnetization mechanism provided in this embodiment realizes the magnetization angle change of the iron core assembly 10 through the positioning pin 330. No additional precision electronic control components such as rotary motors and encoders are required. Only positioning pins 330 at different angles need to be set on different support seats 320. On the one hand, the manufacturing cost is greatly reduced. On the other hand, compared with the electronic control method, the mechanical method is easier to implement and has reliable accuracy.
[0048] In this embodiment, the first direction X, the second direction Y, and the vertical direction Z intersect each other perpendicularly.
[0049] In one embodiment, combined Figure 2 The positioning pins 330 of different lifting components 300 are sequentially deflected along the first direction X at preset angles. For example, Figure 2 In the first lifting component 300, the mounting radial angle between the locating pin 330 and the first direction X is 'a'; the mounting radial angle between the locating pin 330 and the first direction X is 'b'; and the mounting radial angle between the locating pin 330 and the first direction X is 'c'. The angles 'a', 'b', and 'c' form an arithmetic sequence, with a tolerance of a preset angle.
[0050] During motor operation, the tooth harmonics generated by the interaction between the stator slots and the core assembly 10 are the main source of torque pulsation. When the magnetization angles of each core assembly 10 are sequentially deflected according to a preset angle, the magnetic fields of adjacent core assemblies 10 form a phase difference in space, causing the tooth harmonics to weaken each other when superimposed. Furthermore, the angle deflection causes the magnetic fields of each core assembly 10 to form a stepped misalignment in the axial direction, resulting in a superimposed air gap magnetic flux density waveform that is closer to a sine wave, reducing higher-order harmonic components.
[0051] In one embodiment, combined Figure 2The preset angle is 3°~8°. For low-speed, high-torque scenarios, a preset angle of 6°~8° can be selected to enhance the suppression of low-order harmonics (such as the 6th and 12th harmonics); for high-speed, low-torque scenarios, a preset angle of 3°~5° is recommended to reduce high-frequency losses and improve high-speed stability.
[0052] Taking a 4-pole 24-slot motor as an example, when the preset angle is 5°, the phase difference of the 24th tooth harmonic is 5°×24=120°, and the amplitude is attenuated to the original amplitude cos120°=0.5. After superimposing 3 iron core components 10 (phase difference 0°, 120°, 240°), the harmonic amplitude can theoretically be reduced to 0.
[0053] Optionally, the preset angles are 3°, 4°, 5°, 6°, 7° and 8°.
[0054] In one embodiment, combined Figure 3 , Figure 4 and Figure 5 The lifting assembly 300 also includes a coaxial limiting block 340, which is mounted on the top of the support base 320. The outer diameter of the coaxial limiting block 340 matches the inner diameter of the core assembly 10. Based on this, the coaxial limiting block 340 ensures that the core assembly 10 placed on the support base 320 is coaxially aligned with it, thus facilitating the subsequent magnetization process by forcing the core assembly 10 to maintain its theoretical axis of rotation. By improving the coaxiality between the core assembly 10 and the magnetizing head 220, the air gap magnetic flux density distribution becomes more uniform. Furthermore, the coaxial limiting block 340 achieves coaxiality constraint of the core assembly 10 through mechanical hard constraint, a solution that is easy to implement and highly reliable.
[0055] In one embodiment, see Figure 5 Each lifting component 300 has two or more positioning pins 330, which are distributed circumferentially along the coaxial limiting block 340. The two or more positioning pins 330 further improve the positioning effect of the core component 10. Without considering the constraint of the coaxial limiting block 340, the two or more positioning pins 330 can prevent the core component 10 from shaking.
[0056] Optionally, each lifting component 300 has two positioning pins 330, and the line connecting the two positioning pins 330 passes through the top view center of the support base 320. On the one hand, this improves the coaxiality between the core component 10 and the lifting component 300, and on the other hand, it avoids over-positioning due to too many positioning pins 330, thereby avoiding difficulty in embedding the core component 10 due to the processing error of multiple positioning pins 330.
[0057] In one embodiment, combined Figure 5The lifting assembly 300 also includes a guide sleeve 350, which is mounted on the work plate 110 and coaxially arranged with the corresponding work station 111. The guide sleeve 350 is used to movably sleeve the lifting shaft 311 of the lifting drive component 310. The lifting shaft 311 moves within the guide sleeve 350, forcing the lifting direction to coincide with the vertical direction Z, ensuring that the core assembly 10 enters the magnetizing head 220 along the vertical direction Z, and avoiding axial displacement of the core assembly 10.
[0058] In one embodiment, combined Figure 5 The inner wall of the guide sleeve 350 has a first positioning groove 351, and the lifting shaft 311 of the lifting drive 310 has a second positioning groove 312. The lifting assembly 300 also includes a key plate 360, which is respectively embedded in the first positioning groove 351 and the second positioning groove 312. The key plate 360 rigidly constrains the lifting shaft 311 to maintain a fixed angle relationship with the guide sleeve 350, preventing the lifting shaft 311 from circumferentially shifting due to torque fluctuations or external forces when the lifting drive 310 starts and stops, and preventing the lifting shaft 311 and the iron core assembly 10 from rotating at an angle during the lifting process, thus ensuring that the iron core assembly 10 reliably enters the magnetizing head 220 at an angle.
[0059] In one embodiment, combined Figure 5 The lifting drive 310 has a lifting shaft 311 with a first positioning plane 313, and the guide sleeve 350 has a positioning notch 352. The positioning notch 352 and the first positioning plane 313 are located in the same radial direction of the lifting shaft 311 of the lifting drive 310. During installation, the circumferential position of the lifting shaft 311 relative to the guide sleeve 350 can be quickly determined by the correspondence between the first positioning plane 313 and the positioning notch 352, without the need for additional calibration steps.
[0060] In one embodiment, combined Figure 3 and Figure 5 The rotor magnetization mechanism also includes a lifting mounting frame 410. All lifting drive components 310 are mounted on the lifting mounting frame 410 at intervals along the first direction X, so that all lifting drive components 310 are mounted on the working plate 110 based on the same reference, avoiding cumulative errors.
[0061] Specifically, the lifting mounting bracket 410 is located below the working plate 110, and the lifting mounting bracket 410 is fixedly installed on the working plate 110 by multiple mounting columns 411. The multiple mounting columns 411 rigidly connect the lifting mounting bracket 410 to the working plate 110, so that the load of each lifting drive component 310 is evenly distributed to the entire working plate 110.
[0062] In one embodiment, combined Figure 4 and Figure 5The lifting assembly 300 also includes a buffer 370, which is fixedly installed on the fixed part of the lifting drive 310. The output end of the buffer 370 is connected to the lifting shaft 311 of the lifting drive 310. When the lifting shaft 311 starts or stops, the buffer 370 absorbs kinetic energy through a damping medium (such as hydraulic oil or air), which can attenuate the vibration frequency of the lifting shaft 311 and prevent the core assembly 10 from shifting due to vibration.
[0063] In one embodiment, combined Figure 3 and Figure 5 The buffer 370 and the lifting drive 310 are arranged side by side to avoid spatial interference with axial components such as the guide sleeve 350. The output forces of the two are in the same direction, which allows the buffer 370 to more effectively buffer the lifting shaft 311 in the vertical Z direction.
[0064] Specifically, the output end of the buffer 370 is connected to the lifting shaft 311 via the crossbar 380 to achieve force transmission.
[0065] In one embodiment, combined Figure 3 and Figure 5 Each lifting drive component 310 corresponds to two buffers 370. The two buffers 370 are located on opposite sides of the lifting shaft 311 of the lifting drive component 310. The symmetrical damping force is used to counteract the lateral torque borne by the lifting shaft 311 and eliminate the axial sway that may be generated by a single buffer 370.
[0066] Optionally, the two buffers 370 are located on opposite sides of the lifting shaft 311 in the first direction X.
[0067] In one embodiment, the rotor magnetizing mechanism further includes a plurality of first position detection sensors 420 distributed at intervals along the first direction X. Each station 111 corresponds to one first position detection sensor 420. The first position detection sensor 420 is used to detect whether the station 111 is placed on the core assembly 10, and to provide real-time feedback on whether the core assembly 10 is in place, so as to avoid omissions of the core assembly 10 and improve assembly accuracy.
[0068] In one embodiment, combined Figure 1 The magnetizing head 220 is mounted on the magnetizing bracket 210 via a magnetizing drive component 230, which drives the magnetizing head 220 to move up and down. During magnetization, the magnetizing drive component 230 drives the magnetizing head 220 downward, shortening the time it takes for the magnetizing head 220 to engage with the iron core assembly 10 and improving magnetization efficiency. After magnetization is complete, the magnetizing drive component 230 drives the magnetizing head 220 upward, preventing interference between the magnetizing head 220 and the lifting assembly 300.
[0069] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0070] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A rotor magnetization mechanism, characterized in that, include: A sliding assembly includes a work plate, a sliding drive member, and a slide rail extending along a first direction. The work plate has two or more workstations spaced apart along the first direction. The sliding drive member is used to drive the work plate to slide along the slide rail. A magnetization assembly includes a magnetization bracket and a magnetization head, wherein the magnetization head is mounted on the magnetization bracket and is located above the slide rail; Two or more lifting components are provided, each of which is installed below one of the workstations. Each lifting component includes a lifting drive, a support base, and a positioning pin. The support base is movably disposed in the corresponding workstation, and the positioning pin protrudes from the support base and is used to position and embed itself in the iron core assembly. The positioning pins of different lifting components are set at different angles on the support base. The lifting drive is installed on the work plate and is used to drive the support base to perform lifting and lowering movements so that the iron core assembly located on the support base enters the magnetizing head.
2. The rotor magnetizing mechanism as described in claim 1, characterized in that: The positioning pins of the different lifting components are sequentially deflected at a preset angle along the first direction.
3. The rotor magnetization mechanism as described in claim 2, characterized in that: The preset angle is 3°~8°.
4. The rotor magnetizing mechanism as described in claim 1, characterized in that: The lifting assembly also includes a coaxial limiting block, which is installed on the top of the support base, and the outer diameter of the coaxial limiting block matches the inner diameter of the core assembly.
5. The rotor magnetization mechanism as described in claim 4, characterized in that: The number of positioning pins in each of the lifting components is two or more, and they are distributed circumferentially along the coaxial limiting blocks.
6. The rotor magnetization mechanism as described in claim 1, characterized in that: The lifting assembly also includes a guide sleeve, which is installed on the working plate and coaxially arranged with the corresponding work station. The guide sleeve is used to movably sleeve the lifting shaft of the lifting drive component.
7. The rotor magnetizing mechanism as described in claim 6, characterized in that: The inner wall of the guide sleeve has a first positioning groove, the lifting shaft of the lifting drive has a second positioning groove, and the lifting assembly further includes a key plate, which is respectively embedded in the first positioning groove and the second positioning groove. And / or, the lifting shaft of the lifting drive has a first positioning plane, the guide sleeve has a positioning notch, and the positioning notch and the first positioning plane are located in the same radial direction of the lifting shaft of the lifting drive.
8. The rotor magnetization mechanism as described in claim 1, characterized in that: The rotor magnetizing mechanism further includes a lifting mounting frame, and all the lifting drive components are installed at intervals on the lifting mounting frame along the first direction. The lifting mounting frame is located below the working plate, and the lifting mounting frame is fixedly installed on the working plate by multiple mounting columns.
9. The rotor magnetizing mechanism according to any one of claims 1 to 8, characterized in that: The lifting assembly also includes a buffer, which is fixedly installed on the fixed part of the lifting drive, and the output end of the buffer is connected to the lifting shaft of the lifting drive. The buffer and the lifting drive are arranged side by side; Each of the lifting drive components corresponds to two buffers, which are located on opposite sides of the lifting shaft of the lifting drive component.
10. The rotor magnetizing mechanism according to any one of claims 1 to 8, characterized in that: The rotor magnetization mechanism further includes a plurality of first position detection sensors distributed at intervals along the first direction, each station corresponding to one first position detection sensor, and the first position detection sensor is used to detect whether the station is placed on the iron core assembly. And / or, the magnetizing head is mounted on the magnetizing bracket via a magnetizing drive, the magnetizing drive being used to drive the magnetizing head to move up and down.