Permanent magnet synchronous motor stator housing assembly dismounting device and dismounting method

Abstract

The application provides a permanent magnet synchronous motor stator shell assembly dismounting device and method, and belongs to the technical field of motor auxiliary equipment. The dismounting device comprises a mounting bracket and a dismounting assembly. The mounting bracket comprises a top plate, an assembly fixing plate, a guide rod and four supporting rods, and the top plate is provided with a driving device. The dismounting assembly comprises a lead screw lever, a nut, a guide rail disc, a plurality of guide rails, a plurality of groups of long bolts corresponding to the guide rails and connecting blocks. The guide rail disc is circular, has a plurality of fan-shaped hole grooves on the guide rail disc, and the guide rails are arranged along the radial direction of the guide rail disc and rotatably connected to the nut at one end. The long bolts are slidably connected to the guide rails at one end, and the other ends of the long bolts are connected to the connecting blocks. The dismounting device and method can simultaneously and accurately position the motor shell, the stator assembly and the rotor assembly during dismounting, ensure stable separation and avoid damage to the rotor assembly.

Description

Technical Field

[0001] This invention relates to the field of electric motor auxiliary equipment technology, and in particular to a device and method for disassembling and assembling a stator housing assembly of a permanent magnet synchronous motor. Background Technology

[0002] Permanent magnet synchronous motors (PMSMs) use permanent magnets for excitation, resulting in a simple structure, low manufacturing cost, and high reliability. Furthermore, because they require no excitation current and have no excitation losses, they exhibit high efficiency and power density. PMSMs used in new energy vehicles consist of a motor housing, stator, rotor, front cover, and rear cover. Bearings are fitted on both sides of the rotor, with one bearing mounted on the front cover. A bearing clamp prevents axial movement. The stator is fitted outside the rotor and fixedly mounted inside the motor housing.

[0003] In related technologies, for conventional permanent magnet synchronous motors, the rotor inside the motor is not fixed to the front cover. During disassembly and assembly, the rotor is usually separated from the motor housing and stator directly by using tools after removing the rear cover.

[0004] In permanent magnet synchronous motors used in new energy vehicles, the rotor is fitted with bearings on both sides, with one bearing mounted on the front cover and a bearing pressure plate to prevent axial movement. This means that the drive motor in new energy vehicles can only be removed by first disassembling the motor housing and stator, which are fixed together, exposing the rotor, and then removing the bearing pressure plate to remove the rotor. The motor housing and front cover are usually bonded with sealant, making manual disassembly difficult. Furthermore, the rotor contains magnets, giving it strong magnetism, which easily attracts the stator core. During disassembly and assembly, misalignment can easily occur, causing the silicon steel sheets of the stator core and rotor to warp and the insulation layer of the stator to peel off, ultimately damaging the motor. Summary of the Invention

[0005] This invention provides a device and method for disassembling and assembling a stator housing assembly of a permanent magnet synchronous motor. During disassembly, the device can accurately position the motor housing, stator assembly, and rotor assembly simultaneously, ensuring stable separation while avoiding damage to the rotor assembly. The technical solution is as follows:

[0006] In a first aspect, embodiments of the present invention provide a device for disassembling and assembling a stator housing assembly of a permanent magnet synchronous motor, comprising: a mounting bracket and a disassembly assembly.

[0007] The mounting bracket includes a top plate, an assembly fixing plate, a guide rod, and four support rods. The top plate and the assembly fixing plate are arranged parallel to each other in the vertical direction. The four support rods are arranged in a rectangular array. One end of each of the four support rods is connected to the top plate. The assembly fixing plate is connected to the middle of the four support rods. The guide rod is parallel to the support rods. Both ends of the guide rod are connected to the top plate and the assembly support rods, respectively. The top plate is equipped with a driving device.

[0008] The disassembly assembly includes a screw lever, a nut, a guide rail disc, multiple guide rails, and multiple sets of long bolts and connecting blocks corresponding to each guide rail. The screw lever is parallel to the support rod and one end is connected to the driving device. The driving device is configured to drive the screw lever to rotate around an axis. The other end of the screw lever is used to connect to the rotor shaft. The nut is fixedly connected to the middle of the guide rail disc. The screw lever passes through the middle of the nut and the guide rail disc. The screw lever and the nut are driven by ball bearings. The guide rail disc is circular and has sections corresponding to each guide rail. The guide plate has multiple fan-shaped slots, which are arranged at equal angular intervals around the axis of the guide plate. The guide plate is arranged radially along the guide plate. One end of the guide plate is rotatably connected to the nut, and the other end of the guide plate overlaps between the corresponding fan-shaped slot and the edge of the guide plate. The long bolt is parallel to the support rod and is slidably connected to the corresponding guide rail at one end. The other end of the long bolt is connected to the connecting block. The connecting block is located on the side of the guide plate facing away from the top plate. The connecting block has a first bolt hole for connecting to the motor housing.

[0009] The guide rail disc also has a guide hole, and the guide rod passes through the guide hole.

[0010] Optionally, the connecting block includes a first connecting segment and a second connecting segment. The first connecting segment is rotatably mounted on the long bolt. The second connecting segment is perpendicularly connected to the end of the first connecting segment away from the guide rail. Therefore, the first bolt hole is located on the second connecting segment, and the axis of the first bolt hole is parallel to the axis of the long bolt.

[0011] Optionally, the nut and the guide rail disc are arranged at intervals in the vertical direction and are fixedly connected by a plurality of positioning bolts. The plurality of positioning bolts correspond one-to-one with the plurality of guide rails. One end of the guide rail has a connecting hole. One end of the guide rail is located between the nut and the guide rail disc. The positioning bolt passes through the connecting hole of the corresponding guide rail.

[0012] Optionally, two guide rods are provided between the top plate and the assembly fixing plate, and the two guide rods are arranged symmetrically with respect to the lever.

[0013] Optionally, bushings are provided protruding on the two opposite surfaces of the guide rail disk, the bushings are arranged around the guide hole, and the guide rod passes through the bushings.

[0014] Optionally, the driving device is a servo motor.

[0015] Optionally, one end of the lever is connected to the output shaft of the servo motor via a coupling.

[0016] Optionally, the assembly mounting plate has a plurality of second bolt holes arranged in a rectangular array.

[0017] Optionally, the mounting bracket includes a plurality of assembly fixing plates, which are stacked in a layered arrangement.

[0018] Secondly, embodiments of the present invention provide a disassembly method, implemented based on the permanent magnet synchronous motor stator housing assembly disassembly and assembly device described in the first aspect above. This disassembly method includes:

[0019] The motor assembly is mounted on the mounting bracket. The motor assembly includes a front cover, a motor housing, a stator assembly, and a rotor assembly. The stator assembly is interference-fitted with the inner wall of the motor housing. One end of the motor housing is connected to the front cover. The rotor assembly is located in the inner hole of the stator assembly and is fixedly connected to the front cover. The rotor assembly has a rotor shaft. The front cover is fixedly connected to the assembly mounting plate.

[0020] The other end of the lead lever is fixedly connected to the rotor shaft. The multiple guide rails are rotated and the positions of the multiple sets of long bolts and connecting blocks are adjusted. The connecting blocks are fixedly connected to the motor housing.

[0021] The drive device is used to drive the lever to rotate, thereby causing the guide rail to rise, which in turn separates the motor housing, the stator assembly and the front end cover.

[0022] Once the height of the motor housing and the stator assembly exceeds that of the rotor assembly, disconnect the front end cover from the assembly fixing plate and remove the front end cover and the rotor assembly from the mounting bracket.

[0023] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following:

[0024] The permanent magnet synchronous motor stator housing assembly disassembly and assembly device provided in this invention allows for independent positioning and connection of the rotor assembly, front end cover, motor housing, and stator assembly during the disassembly of the rotor assembly, motor housing, and stator assembly within the motor assembly. Power is provided by the drive device, and a screw-nut moving pair formed by a lever and nut drives the guide rail plate upwards, thereby pulling the motor housing and stator assembly upwards together. During this process, the rotor assembly and front end cover remain fixed to the assembly fixing plate. This achieves priority disassembly and separation of the motor housing and stator assembly in the vertical direction, while simultaneously and accurately positioning the motor housing, stator assembly, and rotor during disassembly, maintaining the assembly clearance between the rotor assembly and stator assembly, achieving stable separation while avoiding damage to the rotor. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the stator housing assembly of the permanent magnet synchronous motor provided in an embodiment of the present invention;

[0027] Figure 2 This is a front view structural schematic diagram of the stator housing assembly of the permanent magnet synchronous motor provided in an embodiment of the present invention;

[0028] Figure 3 Is it like this? Figure 2 Schematic diagram of the cross section at point AA;

[0029] Figure 4 This is a schematic diagram of the structure of the guide rail disk provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the assembly structure of the guide rail, long bolt, and connecting block provided in an embodiment of the present invention;

[0031] Figure 6 This is a flowchart of a disassembly method provided in an embodiment of the present invention.

[0032] In the diagram: 1-Mounting bracket; 2-Disassembly assembly; 3-Drive device; 4-Positioning bolt; 5-Motor assembly; 11-Top plate; 12-Assembly fixing plate; 13-Guide rod; 14-Support rod; 21-Lever; 22-Nut; 23-Guide rail disc; 24-Guide rail; 25-Long bolt; 26-Connecting block; 26a-First bolt hole; 51-Front end cover; 52-Motor housing; 53-Stator assembly; 54-Rotor assembly; 121-Second bolt hole; 211-Coupling; 231-Sector-shaped slot; 232-Guide hole; 233-Shaft sleeve; 241-Connecting hole; 261-First connecting section; 262-Second connecting section; 541-Rotor shaft. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0034] In related technologies, for conventional permanent magnet synchronous motors, the rotor inside the motor is not fixed to the front cover. During disassembly and assembly, the rotor is usually separated from the motor housing and stator directly by using tools after removing the rear cover.

[0035] In permanent magnet synchronous motors used in new energy vehicles, the rotor is fitted with bearings on both sides, with one bearing mounted on the front cover and a bearing pressure plate to prevent axial movement. This means that the drive motor in new energy vehicles can only be removed by first disassembling the motor housing and stator, which are fixed together, exposing the rotor, and then removing the bearing pressure plate to remove the rotor. The motor housing and front cover are usually bonded with sealant, making manual disassembly difficult. Furthermore, the rotor contains magnets, giving it strong magnetism, which easily attracts the stator core. During disassembly and assembly, misalignment can easily occur, causing the silicon steel sheets of the stator core and rotor to warp and the insulation layer of the stator to peel off, ultimately damaging the motor.

[0036] Figure 1 This is a three-dimensional structural diagram of the stator housing assembly of the permanent magnet synchronous motor provided in an embodiment of the present invention. Figure 2 This is a front view structural schematic diagram of the stator housing assembly of the permanent magnet synchronous motor provided in an embodiment of the present invention. Figure 3 Is it like this? Figure 2 A cross-sectional view at point AA. Figure 4 This is a schematic diagram of the guide rail disk provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the assembly structure of the guide rail, long bolt, and connecting block provided in an embodiment of the present invention. Figures 1 to 5 As shown, through practice, the applicant provides a device for disassembling and assembling a stator housing assembly of a permanent magnet synchronous motor, including: a mounting bracket 1 and a disassembly assembly 2.

[0037] The mounting bracket 1 includes a top plate 11, an assembly fixing plate 12, guide rods 13, and four support rods 14. The top plate 11 and the assembly fixing plate 12 are arranged parallel to each other vertically. The four support rods 14 are arranged in a rectangular array, with one end of each support rod connected to the top plate 11. The assembly fixing plate 12 is connected to the middle of each support rod 14, providing support for the top plate 11 and the assembly fixing plate 12. The space between the top plate 11 and the assembly fixing plate 12 serves as the space for the motor assembly 5, which needs to be disassembled and reassembled from the permanent magnet synchronous motor. The guide rods 13 are parallel to the support rods 14, with both ends connected to the top plate 11 and the assembly support rods 14, respectively. The top plate 11 is equipped with a drive device 3.

[0038] The disassembly assembly 2 includes a lead lever 21, a nut 22, a guide rail disc 23, multiple guide rails 24, and multiple sets of long bolts 25 and connecting blocks 26 corresponding to each guide rail 24. The lead lever 21 is parallel to the support rod 14 and one end is connected to the drive device 3. The drive device 3 is configured to drive the lead lever 21 to rotate around its axis. The other end of the lead lever 21 is used to connect to the rotor shaft 541. The nut 22 is fixedly connected to the middle of the guide rail disc 23. The lead lever 21 passes through the middle of the nut 22 and the guide rail disc 23. The lead lever 21 and the nut 22 are driven by ball bearings, forming a lead screw and nut kinematic pair. When the drive device 3 drives the lead lever 21 to rotate, the nut 22 connected to it can drive the guide rail disc 23 to move up and down in the vertical direction. The guide rail disk 23 is circular and has multiple fan-shaped slots 231 that correspond one-to-one with multiple guide rails 24. The multiple fan-shaped slots 231 are arranged at equal angular intervals around the axis of the guide rail disk 23. The guide rails 24 are arranged radially along the guide rail disk 23. One end of the guide rail disk 23 is rotatably connected to the nut 22, and the other end of the guide rail disk 23 overlaps between the corresponding fan-shaped slot 231 and the edge of the guide rail disk 23. The long bolt 25 is parallel to the support rod 14 and one end is slidably connected to the corresponding guide rail 24. The other end of the long bolt 25 is connected to the connecting block 26. The connecting block 26 is located on the side of the guide rail disk 23 facing away from the top plate 11. The connecting block 26 has a first bolt hole 26a for connecting with the motor housing 52.

[0039] The guide rail plate 23 also has a guide hole 232, and the guide rod 13 passes through the guide hole 232.

[0040] In this embodiment of the invention, when the stator housing assembly of the permanent magnet synchronous motor needs to be disassembled and assembled, the motor assembly 5 of the permanent magnet synchronous motor can first be placed on the mounting bracket 1. The motor assembly 5 includes a front cover 51, a motor housing 52, a stator assembly 53, and a rotor assembly 54. When disassembling the stator assembly 53, the rear end cover of the permanent magnet synchronous motor is removed first to form the current motor assembly 5. The stator assembly 53 is interference-fitted with the inner wall of the motor housing 52. One end of the motor housing 52 is connected to the front cover 51. The rotor assembly 54 is located in the inner hole of the stator assembly 53 and is fixedly connected to the front cover 51. The rotor assembly 54 has a rotor shaft 541. During installation, the front cover 51 is first fixedly connected to the assembly fixing plate 12, and then the other end of the lead lever 21 is fixedly connected to the rotor shaft 541 to achieve the initial positioning of the front cover 51 and the rotor assembly 54. Next, based on the external dimensions of the motor housing 52, the sliding bolt 25 is used to adjust the relative position of the connecting block 26 on the guide rail 24. Then, multiple guide rails 24 are rotated around the rotating connection point with the nut 22, so that the first bolt hole 26a on the connecting block 26 corresponds to the hole on the motor housing 52 used for fixed connection with the rear end cover. Then, the connecting block 26 is fixedly connected to the motor housing 52 through the first bolt hole 26a, completing the fixed connection between the guide rail plate 23 and the motor housing 52 and the stator assembly 53. Then, the drive device 3 can be used to drive the lever 21 to rotate, driving the guide rail plate 23 to rise. The driving force of the drive device 3 provides an upward pulling force to de-adhere the sealant between the motor housing 52 and the front end cover 51, thereby separating the motor housing 52, the stator assembly 53 and the front end cover 51. The guide rod 13, which passes through the guide hole 232 on the guide rail disk 23, can limit and guide the upward path of the guide rail disk 23 during its ascent, ensuring that it does not wobble radially and maintaining the assembly gap between the rotor assembly 54 and the stator assembly 53 during separation. After the height of the motor housing 52 and the stator assembly 53 exceeds that of the rotor assembly 54, the connection between the front cover 51 and the assembly fixing plate 12 is released, and the front cover 51 and the rotor assembly 54 are removed from the mounting bracket 1, thus completing the entire disassembly process.

[0041] Using the permanent magnet synchronous motor stator housing assembly disassembly and assembly device provided in this embodiment of the invention, when disassembling the internal rotor assembly 54 from the motor housing 52 and stator assembly 53, the rotor assembly 54 and the front end cover 51, which are connected as a whole, are independently positioned and connected. When the drive device 3 provides power, and the guide rail disc 23 is driven upward through the lead screw 21 and nut 22 forming a lead screw and nut moving pair, thereby pulling the motor housing 52 and stator assembly 53 upward together, the rotor assembly 54 and the front end cover 51 remain fixed to the assembly fixing plate 12. This achieves priority disassembly and separation of the motor housing 52 and stator assembly 53 in the vertical direction, while simultaneously and accurately positioning the motor housing 52, stator assembly 53, and rotor assembly 54 during disassembly, maintaining the assembly clearance between the rotor assembly 54 and stator assembly 53, achieving stable separation while avoiding damage to the rotor.

[0042] For example, in this embodiment of the invention, the rotating sheet metal of the guide rail 24 is 207mm, the movable portion of the long bolt 25 and the adjusting connecting block 26 on the guide rail 24 is 154mm, the inner diameter of the guide rail disk 23 located inside the fan-shaped slot 231 in the radial direction is 120mm, and the outer diameter of the guide rail disk 23 located outside the fan-shaped slot 231 is 530mm. This design is applicable to the disassembly of motor assemblies 5 with a diameter of 120-430mm in the motor housing 52, and has strong adaptability.

[0043] Optionally, the connecting block 26 includes a first connecting segment 261 and a second connecting segment 262. The first connecting segment 261 is rotatably mounted on the long bolt 25. The second connecting segment 262 is perpendicularly connected to the end of the first connecting segment 261 away from the guide rail plate 23. Therefore, the first bolt hole 26a is located on the second connecting segment 262, and the axis of the first bolt hole 26a is parallel to the axis of the long bolt 25. Exemplarily, in this embodiment of the invention, when connecting the motor assembly 5 to the assembly fixing plate 12, the connecting block 26 can be rotated about the axis of the long bolt 25, causing the second connecting segment 262, which protrudes horizontally, to rotate to a direction opposite to the motor housing 52, avoiding interference and rubbing against the motor housing 52. After the motor assembly 5 is fixed, the connecting block 26 can be rotated again, so that the first bolt hole 26a on the second connecting segment 262 corresponds to the hole on the motor housing 52 used for fixed connection with the rear end cover, and the connection is fixed using bolts.

[0044] Optionally, the nut 22 and the guide rail disc 23 are arranged vertically at intervals and fixedly connected by multiple positioning bolts 4. Each positioning bolt 4 corresponds to one of the multiple guide rails 24. One end of each guide rail 24 has a connecting hole 241, and one end of the guide rail 24 is located between the nut 22 and the guide rail disc 23. The positioning bolts 4 pass through the corresponding connecting holes 241 of the guide rail 24. Exemplarily, in this embodiment of the invention, the positioning bolts 4 are used to connect the nut 22, the guide rail disc 23, and the guide rails 24 as a whole. In addition to serving as a series connection, the positioning bolts 4 can also act as a pivot structure for the guide rails 24. Furthermore, the nut 22, the guide rail disc 23, and the multiple guide rails 24 are all detachable, facilitating disassembly, replacement, and maintenance when not in use.

[0045] Optionally, two guide rods 13 are provided between the top plate 11 and the assembly fixing plate 12, and the two guide rods 13 are symmetrically arranged with respect to the lead lever 21. Exemplarily, in this embodiment of the invention, by symmetrically arranging the two guide rods 13, the limiting and guiding of the lifting path of the guide rail disk 23 is achieved, while reducing the contact stress on a single guide rod 13 and improving the overall service life of the permanent magnet synchronous motor stator housing assembly disassembly and assembly device.

[0046] Optionally, bushings 233 protrude from the two opposite surfaces of the guide rail disk 23, and the bushings 233 are arranged around the guide hole 232, with the guide rod 13 passing through the bushings 233. Exemplarily, in this embodiment of the invention, bushings 233 protrude from the two sides of the guide rail disk 23 around the guide hole 232. During the lifting and lowering of the guide rail disk 23, the inner wall of the bushings 233 increases the contact area with the guide rod 13, further reducing contact stress and improving the stability of the limiting guide. This maintains a stable gap between the stator assembly 53 and the rotor assembly 54, achieving stable separation while avoiding damage to the rotor assembly 54.

[0047] Optionally, the drive device 3 is a servo motor. For example, in this embodiment of the invention, a servo motor is used as the drive device 3, which has high speed, strong overload resistance, and low operating noise, making it suitable for workshop processing environments.

[0048] Optionally, one end of the lead lever 21 is connected to the output shaft of the servo motor via a coupling 211. Exemplarily, in this embodiment of the invention, the lead lever 21 is configured to be detachably connected to the drive device 3 via the coupling 211, facilitating maintenance and replacement when not in operation, and further improving the overall service life of the permanent magnet synchronous motor stator housing assembly disassembly and assembly device.

[0049] Optionally, the assembly mounting plate 12 has a plurality of second bolt holes 121, which are arranged in a rectangular array. For example, in this embodiment of the invention, different positions of the second bolt holes 121 can be selected for corresponding bolt connections based on the mounting hole positions on the front end cover 51 of the motor assembly 5 of different sizes and specifications, resulting in strong adaptability.

[0050] Optionally, the mounting bracket 1 includes multiple assembly fixing plates 12, which are stacked in layers. Exemplarily, in this embodiment of the invention, due to the different dimensions of the motor assemblies 5, the end height of the rotor shaft 541 in the rotor assembly 54 also varies. When the end height of the rotor shaft 541 is insufficient to connect with the end of the lead lever 21, multiple layers of assembly fixing plates 12 can be used to ensure a stable connection between the rotor shaft 541 and the lead lever 21. This provides flexible assembly and further improves the adaptability of the permanent magnet synchronous motor stator housing assembly.

[0051] Figure 6 This is a flowchart of a disassembly method provided in an embodiment of the present invention. For example... Figure 6 As shown, embodiments of the present invention also provide a disassembly method, based on Figures 1 to 5 The aforementioned permanent magnet synchronous motor stator housing assembly disassembly and assembly device is implemented, and the disassembly method includes the following steps:

[0052] S1, the motor assembly 5 is mounted on the mounting bracket 1. The motor assembly includes a front cover 51, a motor housing 52, a stator assembly 53 and a rotor assembly 54. The stator assembly 53 is interference-fitted with the inner wall of the motor housing 52. One end of the motor housing 52 is connected to the front cover 51. The rotor assembly 54 is located in the inner hole of the stator assembly 53 and is fixedly connected to the front cover 51. The rotor assembly 54 has a rotor shaft 541. The front cover 51 is fixedly connected to the assembly fixing plate 12.

[0053] S2, fix the other end of the lead lever 21 to the rotor shaft 541, rotate the multiple guide rails 24 and adjust the positions of the multiple sets of long bolts 25 and connecting blocks 26, and fix the connecting blocks 26 to the motor housing 52.

[0054] S3, the drive device 3 drives the lever 21 to rotate, thereby driving the guide rail disk 23 to rise, thereby separating the motor housing 52, stator assembly 53 and front cover 51.

[0055] S4. After the height of the motor housing 52 and the stator assembly 53 exceeds that of the rotor assembly 54, disconnect the front cover 51 from the assembly fixing plate 12 and remove the front cover 51 and the rotor assembly 54 from the mounting bracket 1.

[0056] Using the permanent magnet synchronous motor stator housing assembly disassembly and assembly device and the disassembly method provided in this embodiment of the invention, when disassembling the internal rotor assembly 54 from the motor housing 52 and stator assembly 53, the rotor assembly 54 and the front end cover 51, which are connected as a whole, are independently positioned and connected. When the drive device 3 provides power, and the guide rail disc 23 is driven upward through the lead screw 21 and nut 22 forming a lead screw and nut moving pair, thereby pulling the motor housing 52 and stator assembly 53 upward together, the rotor assembly 54 and the front end cover 51 remain fixed to the assembly fixing plate 12. This achieves priority disassembly and separation of the motor housing 52 and stator assembly 53 in the vertical direction, while simultaneously and accurately positioning the motor housing 52, stator assembly 53, and rotor assembly 54 during disassembly, maintaining the assembly clearance between the rotor assembly 54 and stator assembly 53, achieving stable separation while avoiding damage to the rotor.

[0057] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” encompasses all elements or objects listed following “comprising” or “including” and are identical to them, but do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. “Up,” “down,” “left,” “right,” etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0058] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for disassembling and assembling a stator housing assembly of a permanent magnet synchronous motor, comprising: Mounting bracket (1) and disassembly assembly (2), The mounting bracket (1) includes a top plate (11), an assembly fixing plate (12), a guide rod (13), and four support rods (14). The top plate (11) and the assembly fixing plate (12) are arranged parallel to each other in the vertical direction. The four support rods (14) are arranged in a rectangular array. One end of the four support rods (14) is connected to the top plate (11). The assembly fixing plate (12) is connected to the middle of the four support rods (14). The guide rod (13) is parallel to the support rods (14). The two ends of the guide rod (13) are connected to the top plate (11) and the assembly support rods (14) respectively. The top plate (11) is provided with a driving device (3). The disassembly assembly (2) includes a screw lever (21), a nut (22), a guide rail disc (23), multiple guide rails (24), and multiple sets of long bolts (25) and connecting blocks (26) corresponding to the multiple guide rails (24). The screw lever (21) is parallel to the support rod (14) and one end is connected to the drive device (3). The drive device (3) is configured to drive the screw lever (21) to rotate around an axis. The other end of the screw lever (21) is used to connect to the rotor shaft (541). The nut (22) is fixedly connected to the middle of the guide rail disc (23). The screw lever (21) passes through the middle of the nut (22) and the guide rail disc (23). The screw lever (21) and the nut (22) are driven by ball bearings. The guide rail disc (23) is circular and has a connection point with the multiple guide rails (24). The guide rail (24) is arranged radially along the guide rail disk (23), with one-to-one corresponding fan-shaped slots (231) and the other end of the guide rail disk (23) being rotatably connected to the nut (22). The other end of the guide rail disk (23) overlaps between the corresponding fan-shaped slots (231) and the edge of the guide rail disk (23). The long bolt (25) is parallel to the support rod (14) and is slidably connected to the corresponding guide rail (24). The other end of the long bolt (25) is connected to the connecting block (26). The connecting block (26) is located on the side of the guide rail disk (23) facing away from the top plate (11). The connecting block (26) has a first bolt hole (26a) for connecting to the motor housing (52). The guide rail disk (23) also has a guide hole (232), and the guide rod (13) passes through the guide hole (232).

2. The permanent magnet synchronous motor stator housing assembly disassembly and assembly device according to claim 1, characterized in that, The connecting block (26) includes a first connecting segment (261) and a second connecting segment (262). The first connecting segment (261) is rotatably mounted on the long bolt (25). The second connecting segment (262) is perpendicularly connected to the end of the first connecting segment (261) away from the guide rail disk (23). Therefore, the first bolt hole (26a) is located on the second connecting segment (262), and the axis of the first bolt hole (26a) is parallel to the axis of the long bolt (25).

3. The permanent magnet synchronous motor stator housing assembly disassembly and assembly device according to claim 1, characterized in that, The nut (22) and the guide rail disc (23) are arranged vertically at intervals and are fixedly connected by a plurality of positioning bolts (4). The plurality of positioning bolts (4) correspond one-to-one with the plurality of guide rails (24). One end of the guide rail (24) has a connecting hole (241). One end of the guide rail (24) is located between the nut (22) and the guide rail disc (23). The positioning bolts (4) are inserted into the connecting holes (241) of the corresponding guide rails (24).

4. The permanent magnet synchronous motor stator housing assembly disassembly and assembly device according to claim 3, characterized in that, Two guide rods (13) are provided between the top plate (11) and the assembly fixing plate (12), and the two guide rods (13) are arranged symmetrically with respect to the wire lever (21).

5. The permanent magnet synchronous motor stator housing assembly disassembly and assembly device according to claim 4, characterized in that, The guide rail disk (23) has two protruding bushings (233) on opposite disk surfaces. The bushings (233) are arranged around the guide hole (232), and the guide rod (13) passes through the bushings (233).

6. The permanent magnet synchronous motor stator housing assembly disassembly and assembly device according to claim 1, characterized in that, The drive device (3) is a servo motor.

7. The permanent magnet synchronous motor stator housing assembly disassembly and assembly device according to claim 6, characterized in that, One end of the wire lever (21) is connected to the output shaft of the servo motor via a coupling (211).

8. The permanent magnet synchronous motor stator housing assembly disassembly and assembly device according to claim 1, characterized in that, The assembly mounting plate (12) has a plurality of second bolt holes (121) arranged in a rectangular array.

9. The permanent magnet synchronous motor stator housing assembly disassembly and assembly device according to claim 1, characterized in that, The mounting bracket (1) includes a plurality of assembly fixing plates (12), which are stacked together.

10. A disassembly method, characterized in that, The disassembly method is implemented based on the permanent magnet synchronous motor stator housing assembly disassembly and assembly device according to any one of claims 1 to 9, and the disassembly method includes: The motor assembly (5) is mounted on the mounting bracket (1). The motor assembly includes a front cover (51), a motor housing (52), a stator assembly (53), and a rotor assembly (54). The stator assembly (53) is interference-fitted with the inner wall of the motor housing (52). One end of the motor housing (52) is connected to the front cover (51). The rotor assembly (54) is located in the inner hole of the stator assembly (53) and is fixedly connected to the front cover (51). The rotor assembly (54) has a rotor shaft (541). The front cover (51) is fixedly connected to the assembly fixing plate (12). The other end of the wire lever (21) is fixedly connected to the rotor shaft (541), the multiple guide rails (24) are rotated and the positions of the multiple sets of long bolts (25) and connecting blocks (26) are adjusted, and the connecting blocks (26) are fixedly connected to the motor housing (52). The drive device (3) drives the lever (21) to rotate, thereby causing the guide rail disk (23) to rise, thereby separating the motor housing (52), the stator assembly (53) from the front end cover (51); After the height of the motor housing (52) and the stator assembly (53) exceeds that of the rotor assembly (54), disconnect the front cover (51) from the assembly fixing plate (12) and remove the front cover (51) and the rotor assembly (54) from the mounting bracket (1).

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