A long-shaft permanent magnet motor rotor assembly method

Abstract

The application relates to the technical field of motor assembly, in particular to a long-shaft permanent magnet motor rotor assembly method, which comprises the following steps: S1, installing a rotor shaft sleeve front tool on a rotor shaft; S2, installing a stop circle base on a stop circle of a motor shell, and installing a rotor shaft sleeve rear tool on the stop circle base; S3, fixing the stop circle base to the motor stop circle through fasteners, and fixing the rotor shaft sleeve rear tool to the stop circle base; and S4, pushing the rotor shaft into a stator inner circle. The application can solve the problem that the rotor and the stator inner circle are adsorbed to each other due to magnetic attraction during long-shaft permanent magnet motor rotor assembly, and long-time and long-distance sliding friction causes motor damage.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of motor assembly, in particular to a long-shaft permanent magnet motor rotor assembly method. BACKGROUND

[0002] In the long-shaft permanent magnet motor system applied in the field of high-end equipment, the rotor assembly process faces a series of severe challenges. Since the magnetic steel of the permanent magnet motor rotor usually adopts a surface-mounted or embedded array structure, and high-magnetic-energy-product neodymium iron boron or samarium cobalt permanent magnet materials are used, when the radial air gap between the rotor containing the magnetic steel and the inner ring of the stator is reduced to a certain critical distance, a very strong nonlinear magnetic attraction will be generated between the two, and the value can reach hundreds or even thousands of newtons.

[0003] Such magnetic attraction will cause the rotor to spontaneously deviate towards the inner wall of the stator during assembly, resulting in a large area of mechanical collision and friction between the motor rotor and the inner ring of the stator. Especially in the assembly process of the long-shaft motor, due to the large length of the rotor, the flexible deformation and magnetic attraction coupling effect will further aggravate the assembly difficulty, which is specifically manifested in that the flexible deformation of the rotor under the action of gravity and the magnetic attraction are coupled with each other, forming a complex mechanical behavior. Specific problems include:

[0004] 1. Mechanical damage risk:

[0005] Due to the action of magnetic attraction, the rotor is prone to long-time and long-distance sliding friction with the inner wall of the stator during assembly, and such friction will cause micro-scratches on the surface of the stator silicon steel sheet, local peeling of the permanent magnet plating, and wear stripes on the surface of the rotor shaft. These damages will significantly change the electromagnetic symmetry of the motor, cause air gap magnetic field distortion, and seriously affect the electromagnetic performance and mechanical life of the motor.

[0006] In high-speed motors, such assembly damage can also cause dynamic imbalance. The centrifugal force caused by uneven mass distribution will intensify the vibration of the motor during operation, and even cause bearing failure or rotor sweep bore and other serious faults, resulting in disastrous consequences.

[0007] 2. Low assembly efficiency:

[0008] The traditional assembly method relies on experience and the operator needs to use levers, shims and other auxiliary tools to repeatedly adjust the position of the rotor to avoid the influence of magnetic attraction. Due to the lack of effective positioning and guiding devices, the assembly of a single motor may take several hours or even longer, which seriously affects the production rhythm, and the assembly quality is difficult to ensure consistency. SUMMARY

[0009] In order to solve the problem that the rotor and the inner circle of the stator are adsorbed to each other due to magnetic attraction force during assembly of the long-shaft permanent magnet motor rotor, and long-time and long-distance sliding friction causes damage to the motor, the application provides a long-shaft permanent magnet motor rotor assembly method.

[0010] The long-shaft permanent magnet motor rotor assembly method provided by the application adopts the following technical scheme:

[0011] The long-shaft permanent magnet motor rotor assembly method comprises the following steps: S1, installing a rotor shaft sleeve front tool on a rotor shaft, wherein the rotor shaft sleeve front tool comprises a first outer ring, a front end indicating structure and a first inner contact block, the front end indicating structure comprises a plurality of annularly arranged front end algae-based piezoluminescence sensors, one end of the front end algae-based piezoluminescence sensor is connected with the first outer ring, the other end is connected with the first inner contact block, and the end of the first inner contact block away from the front end algae-based piezoluminescence sensor is used to contact the rotor shaft; S2, installing a stop circle base on a stop circle of a motor shell, and installing a rotor shaft sleeve rear tool on the stop circle base, wherein the rotor shaft sleeve rear tool comprises a second outer ring, a rear end indicating structure and a second inner contact block, the rear end indicating structure comprises a plurality of annularly arranged rear end algae-based piezoluminescence sensors, one end of the rear end algae-based piezoluminescence sensor is connected with the second outer ring, the other end is connected with the second inner contact block, and the end of the second inner contact block away from the rear end algae-based piezoluminescence sensor is used to contact the rotor; S3, fixing the stop circle base to the motor stop circle through a fastener, and fixing the rotor shaft sleeve rear tool to the stop circle base; S4, pushing the rotor shaft into the inner circle of the stator, adjusting the position of the rotor shaft according to the light-emitting position and light-emitting intensity of the front end indicating structure, and adjusting the angle of the rotor shaft according to the light-emitting position and light-emitting intensity of the rear end indicating structure.

[0012] By adopting the above technical scheme, the front and rear support structures are formed by cooperation of the rotor shaft sleeve front tool, the stop circle base and the rotor shaft sleeve rear tool, so that the long-time and long-distance sliding friction of the rotor and the inner wall of the stator due to magnetic attraction force during assembly can be avoided, the problems of surface scratch of the stator silicon steel sheet, peeling of the permanent magnet plating layer and surface wear of the rotor shaft are solved, and the electromagnetic performance and mechanical life of the motor are protected; at the same time, the position of the rotor shaft is adjusted according to the light-emitting position and light-emitting intensity of the front end indicating structure, the angle of the rotor shaft is adjusted according to the light-emitting position and light-emitting intensity of the rear end indicating structure, the safe distance between the rotor and the stator is maintained during assembly, and there is no direct contact, so that the assembly operation is more convenient, fast and controllable, the production efficiency is improved, the production rhythm is optimized, the algae-based piezoluminescence sensor can normally work without being affected by the strong magnetic field in the motor, and the internal piezoluminescence quality of the algae-based piezoluminescence sensor can support continuous work of the algae-based piezoluminescence sensor for at least five months.

[0013] Optionally, the rotor shaft is fixedly connected with the rotor, and the rotor shaft has a plurality of rotor shaft segments, and the rotor shaft sleeve front tool in S1 is matched with one of the two rotor shaft segments closest to the output end.

[0014] By adopting the technical scheme, the installation position of the rotor shaft sleeve front tool can be determined, and the innovative front and rear double support structure is perfected in cooperation with other components in subsequent steps.

[0015] Optionally, the motor housing has two stop collar rings, and the stop collar base in S2 is installed on any one of the two stop collar rings.

[0016] By adopting the technical scheme, the installation position can be flexibly selected, and the front and rear double support structure can better play a role.

[0017] Optionally, one end of the first outer ring is provided with a tapered guide part, and the rotor shaft sleeve front tool in S1 has one end of the tapered guide part facing the output end of the rotor shaft.

[0018] By adopting the technical scheme, the tapered guide part plays a role in that when the rotor shaft starts to enter the inner hole of the rotor shaft sleeve rear tool or the inner ring of the stator, even if there is an initial misalignment, the rotor shaft can be smoothly corrected through the sliding contact of the tapered surface, so as to reduce the initial misalignment.

[0019] Optionally, in S4, the output end of the rotor shaft is pushed in from the side of the motor housing where the rotor shaft sleeve rear tool is installed.

[0020] By adopting the technical scheme, the rotor shaft output end is pushed in from the side of the motor housing where the rotor shaft sleeve rear tool is installed, the front rotor shaft sleeve front tool can provide front support, and the rear stop collar base and rotor shaft sleeve rear tool combination can provide rear support, forming a front and rear double support structure, avoiding the long-time and long-distance sliding friction of the rotor with the inner wall of the stator caused by strong magnetic attraction during assembly, solving the problems of surface scratching of the stator silicon steel sheet, peeling of the permanent magnet plating, and surface wear of the rotor shaft caused by traditional assembly methods, effectively protecting the electromagnetic performance and mechanical life of the motor; at the same time, the rotor and the stator always maintain a safe distance during the entire assembly process without direct contact, making the assembly operation more convenient, fast and controllable, greatly improving the production efficiency and optimizing the production rhythm.

[0021] Optionally, the inner diameter of the tapered guide part is larger than the diameter of the rotor shaft segment matched therewith, forming a clearance fit, the inner diameter of the space surrounded by the plurality of first inner contact blocks matches the diameter of the rotor shaft segment matched therewith, and the outer diameter of the first outer ring is larger than the outer diameter of the rotor and smaller than the inner diameter of the stator.

[0022] By adopting the technical scheme, the tapered guide part and the rotor shaft section form a clearance fit, facilitating assembly and disassembly; the inner diameter of the space surrounded by the first inner contact block matches the diameter of the rotor shaft section matched therewith, capable of triggering the front end algae-based force-induced luminescence sensor of the front end indicating structure when the position of the rotor shaft deviates, the outer diameter of the first outer ring is between the outer diameter of the rotor and the inner diameter of the stator, capable of keeping the rotor and the stator inner ring at a distance during the process of pushing the rotor into the stator inner ring, avoiding the rotor and the stator from being adsorbed and collided due to the magnetic steel attraction force, preventing the rotor and the stator inner ring from being damaged by long-distance and long-time friction, protecting the electromagnetic performance and mechanical life of the motor; at the same time, keeping a safe distance between the rotor and the stator during assembly, making the assembly operation more convenient, fast and controllable, and improving the production efficiency; after the pushing and subsequent installation and fixation are completed, the tapered guide part and the rotor shaft section form a clearance fit, and the outer diameter of the first outer ring is between the outer diameter of the rotor and the inner diameter of the stator, which also facilitates the relevant personnel to take out the rotor shaft sleeve front tooling and recycle it.

[0023] Optionally, the outer diameter of the first outer ring is smaller than the inner diameter of the space surrounded by the plurality of second inner contact blocks, and the inner diameter of the space surrounded by the plurality of second inner contact blocks matches the diameter of the rotor.

[0024] By adopting the technical scheme, the rotor shaft sleeve front tooling can smoothly pass through the rotor shaft sleeve rear tooling, and even if the rotor deviates during the process of pushing the rotor into the stator inner ring, the rotor will first abut against the inner diameter of the space surrounded by the plurality of second inner contact blocks, keeping the rotor first outer ring and the stator inner ring at a distance, avoiding the rotor from being adsorbed and collided with the stator inner ring due to the magnetic steel attraction force, and at the same time, after the rotor abuts against the second inner contact block, the rear end algae-based force-induced luminescence sensor corresponding to the second inner contact block will be triggered, and the staff can adjust the angle of the rotor shaft through the light-emitting position and light-emitting intensity through the auxiliary tool.

[0025] Optionally, the material of the stop collar base is stainless steel, and the fastener includes a first fastening bolt, and the first fastening bolt is connected with the stop collar through the stop collar base.

[0026] By adopting the technical scheme, the stop collar base made of stainless steel is safe and reliable, and can be repeatedly used for a long time; the first fastening bolt is connected with the stop collar through the stop collar base, ensuring the stability of the stop collar base and providing a basis for the subsequent installation of the rotor shaft sleeve rear tooling.

[0027] Optionally, the outer diameter of the second outer ring matches the inner diameter of the stop collar, one end of the second outer ring is provided with a connecting outer edge, and the fastener further includes a second fastening bolt, and the second fastening bolt is connected with the stop collar through the connecting outer edge and the stop collar base in sequence.

[0028] By adopting the technical scheme, the second outer ring outer diameter cooperates with the inner diameter of the stop ring, so that the second outer ring can be positioned on the stop ring base; in the mode that the second fastening bolt penetrates the connecting outer edge and the stop ring base connected with the stop ring in sequence, the overall strength of the rear support can be increased, the rotor shaft sleeve rear tooling can be ensured not to deviate or fall off during the pushing process of the rotor shaft, and thus the assembly stability is improved. Meanwhile, the connection mode also makes the disassembly, replacement and maintenance of the rotor shaft sleeve rear tooling more convenient and fast, and reduces the maintenance cost and installation and disassembly time.

[0029] Optionally, the first inner contact block, the second inner contact block, the first outer ring and the second outer ring are all transparent nylon materials.

[0030] By adopting the technical scheme, the transparent material facilitates the observation of the pushing state and position of the rotor shaft by the staff, and the light emission of the front end indicating structure and the rear end indicating structure; the nylon material has good wear resistance and self-lubricating properties, can reduce the frictional resistance between the tooling and the rotor and between the tooling and the stator, and avoids scratching the surface of the rotor and the stator.

[0031] In summary, the present application has at least one of the following beneficial technical effects:

[0032] 1. Avoiding the sliding friction between the rotor and the stator, solving the problems of scratching the surface of the stator silicon steel sheet, peeling off the permanent magnet coating and wearing the surface of the rotor shaft, and protecting the electromagnetic performance and mechanical life of the motor;

[0033] 2. Keeping the rotor and the stator at a safe distance and without direct contact during assembly, guiding the staff to timely adjust the position and angle of the rotor shaft through the light emission of the front end indicating structure and the rear end indicating structure, reducing the increase of magnetic attraction caused by the reduction of radial air gap, solving the problem of long assembly time of a single motor under the traditional assembly method, and improving the production efficiency and optimizing the production rhythm;

[0034] 3. The multi-stage fixing mode ensures the stability of the tooling system and guarantees the assembly quality. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is an internal structure schematic diagram of the long shaft permanent magnet motor during assembly provided by the embodiment of the present application.

[0036] Mark explanation: 1-rotor shaft sleeve front tooling; 101-first outer ring; 102-first inner contact block; 103-front end algae-based force-induced luminescence sensor; 2-stop ring base; 3-rotor shaft sleeve rear tooling; 301-second outer ring; 302-second inner contact block; 303-rear end algae-based force-induced luminescence sensor; 304-connecting outer edge; 4-rotor; 5-stator. DETAILED DESCRIPTION

[0037] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0038] This application discloses an assembly method for a long-shaft permanent magnet motor rotor 4.

[0039] The assembly method for the rotor of a long-shaft permanent magnet motor includes the following steps.

[0040] The long-shaft permanent magnet motor rotor assembly method provided in this application includes:

[0041] S1. Install the rotor shaft sleeve front fixture 1 onto the rotor shaft;

[0042] S2. Install the stop ring base 2 on the stop ring of the motor housing, and install the rotor shaft sleeve tooling 3 on the stop ring base 2;

[0043] S3. Fix the stop ring base 2 to the motor stop ring with fasteners, and fix the rotor shaft sleeve rear tooling 3 to the stop ring base 2;

[0044] S4. Push the rotor shaft into the inner ring of stator 5.

[0045] Multiple steps were carried out in an orderly manner, forming a complete assembly process that ensured the stable and efficient installation of the long-shaft permanent magnet motor rotor during assembly, avoiding damage to the inner rings of rotor 4 and stator 5 caused by magnetic attraction. Because each step was interconnected, the tooling was prepared in advance, allowing the subsequent installation of rotor 4 to be carried out under the constraint and protection of the tooling, reducing the impact of magnetic attraction and ensuring the assembly quality and service life of the motor.

[0046] like Figure 1 As shown, specifically, the rotor shaft is fixedly connected to the rotor 4. The rotor shaft has multiple rotor shaft segments. When installing the rotor shaft sleeve pre-tool 1, it is fitted with the one closest to the output end of the two rotor shaft segments closest to the rotor 4. The rotor shaft sleeve pre-tool 1 plays a crucial role, acting as a protective ring for the rotor 4 during assembly. The rotor shaft sleeve pre-tool 1 includes a first outer ring 101, a front end indicator structure, and a first inner contact block 102. The front end indicator structure includes multiple annularly arranged front-end algae-based mechanoluminescent sensors 103. One end of each front-end algae-based mechanoluminescent sensor 103 is connected to the first outer ring 101, and the other end is connected to the first inner contact block 102. The connection method can be adhesive or snap-fit. The front-end algae-based mechanoluminescent sensor 103 can emit light when subjected to pressure, and the light intensity is proportional to the received pressure. The end of the first inner contact block 102 away from the front-end algae-based mechanoluminescent sensor 103 is used to contact the rotor shaft.

[0047] The inner diameter of the conical guide part is larger than the diameter of the rotor shaft segment matched therewith, forming a clearance fit, which enables the rotor shaft sleeve front tooling 1 to be sleeved on the rotor shaft without being difficult to install or remove due to being too tightly fitted. The outer diameter of the first outer ring 101 is larger than the outer diameter of the rotor 4 and smaller than the inner diameter of the stator 5, so that when the rotor shaft advances into the inner ring of the stator 5, the rotor shaft sleeve front tooling 1 can form a safe distance limit between the rotor 4 and the inner ring of the stator 5, avoiding direct contact between the rotor 4 and the inner ring of the stator 5. The inner diameter of the space surrounded by the plurality of first inner contact blocks 102 matches the diameter of the rotor shaft segment matched therewith, enabling the rotor shaft to trigger the front end algae-based force-induced luminescence sensor 103 when the position of the rotor shaft deviates, so that the operator can determine the specific direction of the position deviation of the rotor shaft by observing the luminescence position and intensity of the front end indicating structure, and make fine adjustments through auxiliary tools, so that the radial air gap between the rotor 4 and the inner ring of the stator 5 is more uniformly distributed within the safe distance limit, reducing the influence of magnetic attraction.

[0048] As shown in Figure 1 , specifically, the motor housing has two stop ring, select any one of them to install the stop ring base 2. The stop ring base 2 plays the role of mounting carrier, connecting the motor housing and the rotor shaft sleeve rear tooling 3. The material of the stop ring base 2 is stainless steel, which has good strength and can ensure that it will not be easily damaged during assembly, thereby providing stable support for the rotor 4. The fasteners used to fix the stop ring base 2 include first fastening bolts (not shown in the figure), which pass through the stop ring base 2 and are connected to the stop ring, fixing the stop ring base 2 on the stop ring of the motor housing to prevent it from loosening during assembly. The fasteners used to fix the rotor shaft sleeve rear tooling 3 also include second fastening bolts (not shown in the figure), which pass through the connecting outer rim 304 and the stop ring base 2 in turn and are connected to the stop ring, and the multi-stage fixing method ensures the stability of the installation of the rotor shaft sleeve rear tooling 3.

[0049] As shown in Figure 1 , specifically, after the installation of the stop ring base 2 is completed, the rotor shaft sleeve rear tooling 3 is installed. The rotor shaft sleeve rear tooling 3 includes a second outer ring 301, a rear end indicating structure, and a second inner contact block 302. The rear end indicating structure includes a plurality of annularly arranged rear end algae-based force-induced luminescence sensors 303, one end of which is connected to the second outer ring 301, and the other end is connected to the second inner contact block 302. The connection method can be adhesive or clamping. The rear end algae-based force-induced luminescence sensor 303 can emit light when subjected to pressure, and the intensity of the emitted light is proportional to the received pressure. The end of the second inner contact block 302 away from the rear end algae-based force-induced luminescence sensor 303 is used to contact the rotor 4.

[0050] The outer diameter size of the second outer ring 301 matches the inner diameter size of the stop ring, and one end of the second outer ring 301 is provided with a connecting outer edge 304. The rotor shaft sleeve rear tool 3 not only plays a supporting role for the rotor 4, but also the inner diameter of the space surrounded by the plurality of second inner contact blocks 302 matches the diameter of the rotor 4, so that when the rotor shaft is angularly offset, the rear end phosphor sensor 303 is triggered by the second inner contact block 302, so that the operator can judge the specific direction of the angular offset of the rotor shaft by observing the light-emitting position and light-emitting intensity of the rear end indicating structure, and through the auxiliary tool, the radial air gap between the rotor 4 and the inner ring of the stator 5 is more uniformly distributed within the safe distance limit, and the influence of magnetic attraction is reduced.

[0051] In actual operation, if the front end indicating structure and the rear end indicating structure emit light at the same time, the angle is first adjusted according to the rear end indicating structure, and after the angle is adjusted, the position is adjusted according to the front end indicating structure, and if the rear end indicating structure indicates that the angle deviates again at this time, the angle is adjusted again according to the rear end indicating structure. It can be understood that during the pushing process, the normal state of the front end indicating structure is that the front end phosphor sensor emits a little light, and the normal state of the rear end indicating structure is that the rear end phosphor sensor does not emit light.

[0052] In addition, the first inner contact block 102, the second inner contact block 302, the first outer ring 101 and the second outer ring 301 are all transparent nylon materials. The transparent material is convenient for the operator to observe the advancing state and position of the rotor shaft, and the light-emitting state of the front end indicating structure and the rear end indicating structure; the nylon material has good wear resistance and self-lubricating properties, which can reduce the frictional resistance between the tool and the rotor 4 and the tool and the stator 5, and avoid scratching the surface of the rotor 4 and the stator 5.

[0053] The implementation principle of the embodiment is that the long-shaft permanent magnet motor rotor assembly method provided by the embodiment has significant innovation compared with the traditional assembly process. It forms a complete protection system through ingenious tooling design and scientific assembly steps, so that the interference of magnetic attraction can be effectively resisted during the assembly process of the long-shaft permanent magnet motor rotor. The various tooling components have clear division of labor, the front tooling 1 of the rotor shaft sleeve is responsible for front end guidance and protection, the stop ring base 2 and the rear tooling 3 of the rotor shaft sleeve are responsible for rear end guidance, support and protection, and the cooperation greatly reduces the contact risk of the rotor 4 and the inner ring of the stator 5, and reduces mechanical damage. Moreover, this process does not require operators to rely on experience, even if the angle position is not adjusted, it also has a safety distance limit, the operation is more simple and fast, the assembly time is greatly shortened, the production efficiency is improved, and according to the front end indicating structure and the rear end indicating structure, the angle position can be adjusted, the interference of magnetic attraction can be further reduced, the loss of tooling is also reduced, and the problem of unstable assembly quality caused by human factors in the traditional assembly method is avoided, which provides strong support for large-scale production and application of long-shaft permanent magnet motors.

[0054] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A method for assembling a rotor of a long-shaft permanent magnet motor, characterized in that, include: S1. Install the rotor shaft sleeve front fixture (1) on the rotor shaft. The rotor shaft sleeve front fixture (1) includes a first outer ring (101), a front end indicator structure and a first inner contact block (102). The front end indicator structure includes a plurality of front end algae-based mechanoluminescent sensors (103) arranged in a ring. One end of the front end algae-based mechanoluminescent sensor (103) is connected to the first outer ring (101) and the other end is connected to the first inner contact block (102). The end of the first inner contact block (102) away from the front end algae-based mechanoluminescent sensor (103) is used to contact the rotor shaft. S2. Install a stop ring base (2) on the stop ring of the motor housing, and install a rotor bushing rear tooling (3) on the stop ring base (2). The rotor bushing rear tooling (3) includes a second outer ring (301), a rear end indicator structure and a second inner contact block (302). The rear end indicator structure includes a plurality of rear end algae-based mechanoluminescent sensors (303) arranged in a ring. One end of the rear end algae-based mechanoluminescent sensor (303) is connected to the second outer ring (301) and the other end is connected to the second inner contact block (302). The end of the second inner contact block (302) away from the rear end algae-based mechanoluminescent sensor (303) is used to contact the rotor (4). S3. Fix the stop ring base (2) to the motor stop ring with fasteners, and fix the rotor bushing rear tooling (3) to the stop ring base (2); S4. Push the rotor shaft into the inner ring of the stator (5), adjust the rotor shaft position according to the luminous position and luminous intensity of the front end indicator structure, and adjust the rotor shaft angle according to the luminous position and luminous intensity of the rear end indicator structure.

2. The long-shaft permanent magnet motor rotor assembly method according to claim 1, characterized in that, The rotor shaft is fixedly connected to the rotor (4). The rotor shaft has multiple rotor shaft segments. In S1, the rotor shaft sleeve front tooling (1) cooperates with the one of the two rotor shaft segments closest to the rotor (4) that is closest to the output end.

3. The long-shaft permanent magnet motor rotor assembly method according to claim 2, characterized in that, The motor housing has two stop rings, and in S2, the stop ring base (2) is installed on either of the two stop rings.

4. The long-shaft permanent magnet motor rotor assembly method according to claim 3, characterized in that, One end of the first outer ring (101) is provided with a tapered guide portion, and the end of the rotor shaft sleeve front tooling (1) in S1 with the tapered guide portion faces the output end of the rotor shaft.

5. The long-shaft permanent magnet motor rotor assembly method according to claim 4, characterized in that, In S4, the output end of the rotor shaft is pushed in from one side of the tooling (3) after the rotor shaft sleeve is installed on the motor housing.

6. The long-shaft permanent magnet motor rotor assembly method according to claim 4, characterized in that, The inner diameter of the tapered guide is larger than the diameter of the rotor shaft segment it mates with, forming a clearance fit. The inner diameter of the space enclosed by the plurality of first inner contact blocks (102) matches the diameter of the rotor shaft segment it mates with. The outer diameter of the first outer ring (101) is larger than the outer diameter of the rotor (4) and smaller than the inner diameter of the stator (5).

7. The long-shaft permanent magnet motor rotor assembly method according to claim 6, characterized in that, The outer diameter of the first outer ring (101) is smaller than the inner diameter of the space enclosed by the plurality of second inner contact blocks (302), and the inner diameter of the space enclosed by the plurality of second inner contact blocks (302) matches the diameter of the rotor (4).

8. The long-shaft permanent magnet motor rotor assembly method according to claim 3, characterized in that, The base (2) of the stop ring is made of stainless steel. The fastener includes a first fastening bolt, which passes through the base (2) of the stop ring and is connected to the stop ring.

9. The method for assembling a long-shaft permanent magnet motor rotor according to claim 1, characterized in that, The outer diameter of the second outer ring (301) matches the inner diameter of the stop ring. One end of the second outer ring (301) is provided with a connecting outer edge (304). The fastener also includes a second fastening bolt, which passes through the connecting outer edge (304) and the stop ring base (2) in sequence and is connected to the stop ring.

10. The method for assembling a long-shaft permanent magnet motor rotor according to claim 1, characterized in that, The first inner contact block (102), the second inner contact block (302), the first outer ring (101) and the second outer ring (301) are all made of transparent nylon.

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