An assembly and disassembly device and method for a hollow shaft type permanent magnet motor

Abstract

The present invention discloses an assembly and disassembly device for a hollow-shaft type permanent magnet motor, which includes a base fixing jig, a base stop installation assembly, a non-drive end rotor guiding assembly, a non-drive end guiding rod, a non-drive end positioning slideway assembly, a non-drive end rotor hoisting piece, a drive end bearing guiding sleeve, a drive end dummy bearing cover guiding piece, a drive end dummy shaft, and a base turning plate; the base fixing jig includes a bottom plate, on which a left support plate and a right support plate are symmetrically arranged, a plurality of threaded holes are arranged on the top surface of the left support plate, and at least one light hole and a plurality of threaded holes are arranged on the top surface of the right support plate; the base fixing jig is fixed on the base turning plate. The present invention can save labor input, shorten the production cycle, effectively reduce the probability of accidents during assembly, make production more user-friendly, reduce the quality risk to the lowest level, and at the same time can efficiently and safely complete the disassembly of the motor, greatly improving the motor assembly efficiency and facilitating batch production.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motors, and particularly to an assembling and disassembling device and method for a hollow shaft type permanent magnet motor. Background Art

[0002] To realize the application of permanent magnet direct drive technology in high-power locomotives and respond to the new direction of future locomotive technology development. The permanent magnet direct drive system has the characteristics of energy saving, high efficiency, and low full-life cost, which can bring good economic and social benefits and is of great significance to the development of railway equipment. The supporting motor is integrally suspended on the bogie frame, the rotating shaft adopts an end face tooth structure, and is connected to the hollow shaft of the wheel set through a force transmission disc. The hollow shaft is connected to the wheel set to achieve direct drive of the locomotive, making the application of the permanent magnet motor in the rail transit field more advantageous.

[0003] The rotor of the permanent magnet motor is of a hollow shaft structure and has strong magnetism. During the assembly process, the stator and rotor will generate strong magnetic force and attract each other. A large impact force will be generated during the attraction process, causing damage to the surfaces of the stator and rotor. Moreover, the air gap between the stator and rotor is small, and it is extremely easy to attract and collide, resulting in bearing damage. It is very difficult to separate the stator and rotor after they are attracted together, and the rotor cannot be maintained at a uniform air gap position. Eventually, the bearing cannot be led into the bearing chamber of the end cover and the end cover stop cannot be led into the stop of the machine base, resulting in inability to assemble. During disassembly, due to the suction force, it is very difficult to take out the rotor from the stator, or even if it is taken out, the surfaces of the stator and rotor will be severely damaged. In addition, the large attraction and impact forces pose potential safety hazards during operation. Therefore, a mature technology for assembling the permanent magnet stator and rotor is the key to the successful assembly of the permanent magnet direct drive synchronous traction motor.

[0004] The existing technologies mainly have the following two methods:

[0005] 1. Traditional vertical assembly: Install a positioning disc (used to hold the dummy shaft on the rotor) at one end of the stator, and install a split positioning ring (used to hold the rotor core) at the other end. Then stand the stator upright and fix it on a large hollow rack; install an assembly dummy shaft at one end of the rotor, then lift the rotor upright and place it inside the stator to complete the assembly of the stator and rotor. Currently, this method is used for assembling medium-sized motors in factories.

[0006] The disadvantages of the above assembly method are as follows: 1) It is difficult to assemble and disassemble the motor using this vertical installation method. When installing (or disassembling) vertically, the stator and rotor need to be lifted upright, and at the same time, the operator needs to stand at a relatively high position for operation, which is extremely inconvenient and poses a large safety hazard. 2) When installing vertically, the upper end of the stator holds the rotor core by the positioning ring, and the friction between the positioning ring and the rotor core will also cause damage to the core. 3) For the assembly of large-sized hollow shaft structure motors, due to the non-concentricity of the stator and rotor, bearing damage will occur. For example: during the assembly of marine motors, iron core strain, coil insulation abrasion, and bearing damage have occurred many times.

[0007] 2. Assembly in horizontal position using an assembly machine: Fix the stator on the workbench of the assembly machine. Then, pass the cantilever center point at one end of the assembly machine through the stator, and clamp the rotor with the center points at both ends. Move the workbench to complete the assembly of the stator and rotor. Currently, this assembly method is used for the assembly of small permanent magnet motors in the factory.

[0008] When the above-mentioned assembly method is used for horizontal assembly with an assembly machine, due to the limitations of the total length of the motor and the size of the bearings, the cantilever center points are made into slender shapes, so the rigidity of the cantilever center points is poor. During the assembly process, the center points will deform, resulting in the following hazards: 1) The stator and rotor are not concentric. In severe cases, the stator and rotor will rub against each other, causing scratches on the iron cores of the stator and rotor. 2) When the bearing enters the bearing housing (integral bearing) or the inner ring of the bearing enters the outer ring of the bearing (split bearing), due to the non-concentricity of the stator and rotor, the bearing will be damaged. 3) The motor structure is a hollow shaft type structure without a central hole and a reference plane that can be used for reference. It is difficult to achieve rotor alignment and impossible to assemble. For example, when assembling a certain high-speed permanent magnet motor, due to the non-concentricity of the stator and rotor, serious scratches occurred on the iron cores of the stator and rotor. When the inner ring of the bearing entered the outer ring of the bearing, due to non-concentricity, the inner ring of the bearing squeezed the rolling balls out of the cage.

[0009] In response to this, it is necessary to develop a new device and method for the assembly and disassembly of hollow shaft type permanent magnet motors, which can ultimately achieve non-destructive assembly on the premise of ensuring the center coincidence of the stator assembly and the rotor assembly, avoid the mutual attraction of the stator and rotor of the permanent magnet motor, improve the assembly efficiency, enhance the safety of assembly, reduce the labor intensity, greatly improve the assembly efficiency of the motor, and achieve the purpose of fast, efficient, safe and accurate assembly. Summary of the Invention

[0010] Aiming at the shortcomings and deficiencies of the prior art, the purpose of the present invention is to provide a device and method for the assembly and disassembly of hollow shaft type permanent magnet motors, which can ultimately achieve non-destructive docking of the two components on the premise of ensuring the center coincidence of the stator assembly and the rotor assembly, avoid the mutual attraction of the stator and rotor of the permanent magnet motor, improve the assembly efficiency, reduce the labor intensity of workers, reduce a large amount of unnecessary economic losses, greatly improve the assembly and disassembly efficiency of motors with a hollow shaft structure, and achieve the purpose of fast, efficient, safe and accurate assembly.

[0011] The present invention is implemented by adopting the following technical solutions:

[0012] A device for the assembly and disassembly of a hollow shaft type permanent magnet motor includes a machine base fixing fixture, a machine base stop mouth installation assembly, a non-drive end rotor guiding assembly, a non-drive end guiding rod, a non-drive end positioning slideway assembly, a non-drive end rotor hoisting part, a drive end bearing guiding sleeve, a drive end dummy bearing cover guiding part, a drive end dummy shaft, and a machine base turning plate.

[0013] The base fixing jig includes a base plate, on which left and right support plates are symmetrically arranged. On the top surface of the left support plate, there are a plurality of threaded holes, and on the top surface of the right support plate, there is at least one light hole and a plurality of threaded holes;

[0014] The base fixing jig is fixed on the base turning plate;

[0015] The base stop installation assembly includes a left stop installation plate and a right stop installation plate. The side plate of the left stop installation plate is fitted with the left fixing part of the motor stator base through a stop and provided with holes for bolt connection. The base plate of the left stop installation plate is provided with holes for bolted connection to the left support plate. The right stop installation plate is fitted with the right fixing part of the motor stator base through a stop. There are at least one threaded hole and a plurality of through holes on the right stop installation plate, and their positions correspond to the holes on the right fixing part of the motor stator base. After a bolt is screwed into the threaded hole of the right stop installation plate, it is inserted into the light hole of the right support plate for positioning. After a bolt is inserted into the light hole of the right stop installation plate, it is screwed into the threaded hole of the right support plate for connection and fixation;

[0016] The non-driving end rotor guiding assembly is composed of a plurality of identical guiding and positioning blocks assembled together. The non-driving end rotor guiding assembly is fitted through its outer stop at the non-driving end port of the motor stator base. The inner stop of the non-driving end rotor guiding assembly is fitted for the rotor core to pass through;

[0017] The non-driving end guiding rod is installed in the end face threaded hole at the non-driving end of the motor stator base;

[0018] The non-driving end positioning slideway assembly includes a non-driving end positioning slide plate and a non-driving end positioning slide seat. The non-driving end positioning slide seat is fixedly connected to the base turning plate. The non-driving end positioning slide plate is slidably assembled on the non-driving end positioning slide seat. Through holes for the non-driving end guiding rod to pass through are correspondingly provided on the circumference of the non-driving end positioning slide plate;

[0019] The non-driving end rotor hoisting part is composed of a mounting disc and a hanging part. The mounting disc is fitted through a stop in the middle of the outer end cover at the non-driving end of the rotor, and the hanging part is fitted through the central hole of the non-driving end positioning slide plate;

[0020] The driving end bearing guiding sleeve is sleeved on the assembly part and is flush with the inner ring of the bearing outside the hollow rotating shaft at the driving end of the rotor;

[0021] The driving end dummy bearing cover guiding part is installed on the driving end bearing cover of the motor stator base by bolts through stop fitting. The driving end dummy bearing cover guiding part is provided with a shaft hole for the driving end dummy shaft to pass through;

[0022] The dummy shaft at the drive end consists of a dummy shaft and an assembly part. The assembly part is installed on the end face of the hollow rotating shaft by bolts after being fitted with the inner stop of the hollow rotating shaft at the drive end of the rotor through the outer stop on it.

[0023] Figure 1 It is a process flow chart of the assembly and disassembly technology for a permanent magnet motor with a hollow shaft structure. When in use, place the base turning plate horizontally and connect it to the base fixing jig with bolts. Connect the base fixing jig and the base with the base stop installation component installed on it with bolts to fix the base. Connect the dummy bearing cover guide at the drive end to the drive end bearing cover with bolts, and connect the non-drive end positioning slide to the base turning plate with bolts; place the base turning plate vertically, install the non-drive end rotor guide assembly at the non-drive end base stop, and install the non-drive end guide rod in the end face screw holes of the non-drive end base; connect the dummy shaft at the drive end to the inner stop at the drive end of the rotor with bolts, install the drive end bearing guide sleeve at the assembled bearing inner ring, connect one end of the non-drive end rotor lifting piece to the rotor with bolts and the other end to the hoist to lift the rotor, and install the non-drive end positioning slide plate on the non-drive end rotor lifting piece; pass the non-drive end end cover screw holes through the non-drive end guide rod, pass the dummy shaft at the drive end through the dummy bearing cover guide at the drive end, pass the rotor core through the non-drive end rotor guide assembly, and when the non-drive end end cover descends to a suitable position from the base stop, take out some of the guide rods and the non-drive end rotor guide assembly, and then continue to descend to complete the assembly of the stator and rotor. If the motor needs to be disassembled, replace the drive end bearing guide sleeve for assembly with the drive end bearing guide sleeve for disassembly, and the rest is the same as the assembly device, and the stator and rotor are separated to complete the disassembly.

[0024] When specifically implemented, an assembly method for a permanent magnet motor with a hollow shaft type includes the following steps:

[0025] 1). Place the base turning plate horizontally and fixedly install the base fixing jig on the predetermined position on the base turning plate with bolts; fixedly install the non-drive end positioning slide on the predetermined position on the base turning plate with bolts;

[0026] 2). Install the dummy bearing cover guide at the drive end on the drive end bearing cover of the motor stator base by mating the stop and then using bolts.

[0027] 3). Install the left stop installation plate and the right stop installation plate on the left and right preset positions of the motor stator base respectively, and screw the positioning bolt into the threaded hole of the right stop installation plate; then lift the motor stator base above the base fixing jig and achieve positioning through the cooperation of the positioning bolt and the light hole on the right support plate, and then fix the left stop installation plate and the right stop installation plate on the upper end faces of the left support plate and the right support plate of the base fixing jig respectively.

[0028] 4), First, assemble the non-driving end cover at the non-driving end of the rotor, and assemble the inner ring of the bearing at its driving end; install the dummy shaft at the driving end on the end face of the hollow rotating shaft at the driving end of the rotor through spigot fit using bolts; then, sleeve the bearing guide sleeve at the driving end on the assembly part and make it flush with the inner ring of the bearing outside the hollow rotating shaft at the driving end of the rotor; fix the lifting piece of the non-driving end rotor on the outer end cover at the non-driving end of the rotor through spigot fit and then using bolts.

[0029] 5), Place the turning plate of the machine base vertically, with the non-driving end of the motor stator machine base facing upwards; place the guiding component of the non-driving end rotor at the port of the non-driving end of the motor stator machine base through spigot fit; screw the guiding rod at the non-driving end into the threaded hole on the end face of the non-driving end of the motor stator machine base.

[0030] 6), Mate the positioning slide plate at the non-driving end with the lifting piece of the non-driving end rotor, and then lift the rotor to the vertical state by the lifting piece of the non-driving end rotor for preliminary alignment above the motor stator machine base; then, the rotor descends smoothly under the simultaneous positioning of the non-driving end and the driving end, that is: the positioning slide plate at the non-driving end fits into the chute of the positioning slide seat at the non-driving end, the guiding rod at the non-driving end passes through the threaded hole of the outer end cover at the non-driving end and the corresponding through hole on the positioning slide plate at the non-driving end in sequence, the rotor enters the interior of the motor stator machine base along the guiding component of the non-driving end rotor, and the dummy shaft at the driving end fits through the shaft hole of the guiding piece of the dummy bearing cover at the driving end.

[0031] 7), When the outer end cover at the non-driving end of the rotor descends to a suitable position from the non-driving end spigot of the motor stator machine base, remove some of the guiding rods at the non-driving end, disassemble and remove the guiding component of the non-driving end rotor, then reinstall the guiding rods at the non-driving end, and the rotor continues to descend until the inner ring of the bearing at the driving end fits into the outer ring of the bearing at the driving end of the machine base to achieve the assembly of the stator and rotor; finally, remove all devices.

[0032] Similarly, a disassembly method for a hollow shaft type permanent magnet motor includes the following steps:

[0033] 1), Place the turning plate of the machine base horizontally, and fix the fixing jig of the machine base on the predetermined position on the turning plate of the machine base through bolts; fix the positioning slide seat at the non-driving end on the predetermined position on the turning plate of the machine base through bolts.

[0034] 2), Install the left spigot mounting plate and the right spigot mounting plate at the preset positions on the left and right sides of the motor stator machine base respectively, with a positioning bolt screwed into the threaded hole of the right spigot mounting plate; then lift the motor stator machine base above the fixing jig of the machine base, and achieve positioning through the cooperation of the positioning bolt and the light hole on the right support plate, and then fix the left spigot mounting plate and the right spigot mounting plate on the upper end faces of the left support plate and the right support plate of the fixing jig of the machine base respectively.

[0035] 3), Mount the dummy shaft at the drive end on the end face of the hollow rotating shaft at the drive end of the rotor by bolt through the spigot fit; then sleeve the bearing guide sleeve at the drive end on the assembly part and make it flush with the inner ring of the bearing outside the hollow rotating shaft at the drive end of the rotor; Mount the lifting piece of the non-drive end rotor on the outer end cover at the non-drive end of the rotor by bolt through the spigot fit.

[0036] 4), Mount the guide piece of the dummy bearing cover at the drive end on the bearing cover at the drive end of the motor stator frame by bolt through the spigot fit.

[0037] 5), Place the turning plate of the frame vertically, with the non-drive end of the motor stator frame facing upward; Remove the bolts of the end cover at the non-drive end in sequence, pass the guide rod at the non-drive end through the bolt holes of the end cover at the non-drive end and screw it into the end face screw holes of the motor stator frame; Then the positioning slide plate at the non-drive end fits and slides into the chute of the positioning slide base at the non-drive end, and descends to cooperate with the lifting piece of the non-drive end rotor. At this time, the through hole of the positioning slide plate at the non-drive end passes through the corresponding guide rod at the non-drive end, and the lifting part of the lifting piece of the non-drive end rotor passes through the central hole of the positioning slide plate at the non-drive end.

[0038] 6), Lift the rotor by the lifting piece of the non-drive end rotor; Then the rotor smoothly ascends under the simultaneous positioning action at the non-drive end and the drive end, that is: the outer end cover at the non-drive end of the rotor ascends along the guide rod at the non-drive end, the dummy shaft at the drive end ascends along the shaft hole of the guide piece of the dummy bearing cover at the drive end, and the inner ring and the outer ring of the bearing are separated.

[0039] 7), When the outer end cover at the non-drive end ascends to a suitable position from the non-drive end spigot of the motor stator frame, take out some guide rods at the non-drive end, disassemble the non-drive end rotor guide assembly and place it at the port of the non-drive end of the motor stator frame by spigot fit; Then reinstall the guide rod at the non-drive end, and the rotor continues to ascend along the non-drive end rotor guide assembly until the stator and rotor are separated; Finally, remove all devices.

[0040] The present invention has the following technical effects:

[0041] (1) When assembling, the stator and rotor of this assembly and disassembly device achieve non-destructive butt joint, achieving the purpose of precise assembly, solving many technical problems in the assembly process such as bearing damage, fitting damage, and device damage, improving the qualified rate of the first assembly test of the product, improving the assembly quality of the product, and at the same time improving the safety of assembly.

[0042] (2) This assembly and disassembly device is light, simple in structure, convenient and fast to operate, reducing the labor intensity of workers, reducing the economic losses caused by quality problems, greatly improving the assembly and disassembly efficiency of the permanent magnet motor with a hollow shaft structure, and achieving the purpose of fast, precise, efficient and safe operation.

[0043] During the motor assembly process, the non-drive-end rotor guiding assembly installed at the non-drive-end housing stop ensures the smooth passage of the rotor core. The drive-end guiding rod installed in the screw holes of the non-drive-end housing passes smoothly through the screw holes of the non-drive-end end cover. At the same time, the rotor descends smoothly with the assistance of the slideway structure. For the bearing protection at the drive end, a bearing guiding sleeve is used. The dummy shaft at the drive end of the rotor connected to the inner stop of the drive end of the rotor passes through the guiding part of the dummy bearing cover installed at the drive-end bearing cover to ensure the smooth assembly of the stator and rotor. During the disassembly operation, the bearing guiding sleeve is replaced with a disassembly bearing guiding sleeve, and the rest of the devices are assembly devices. The stator and rotor are separated to complete the disassembly. During the operation process, the coaxiality of the stator and rotor is within the allowable range, avoiding bearing damage, reducing the scrap rate of parts, solving the vibration and noise quality problems of the permanent magnet motor, and reducing production costs.

[0044] The design of the present invention is reasonable, which can save labor input, shorten the production cycle, effectively reduce the probability of accidents during assembly, make production more user-friendly, reduce the quality risk to the lowest level, and at the same time can efficiently and safely complete the disassembly of the motor, greatly improving the motor assembly efficiency, facilitating mass production, and having good practical application value. Brief Description of the Drawings

[0045] Figure 1 It shows the process flow chart of the assembly and disassembly process of the permanent magnet motor with a hollow shaft structure.

[0046] Figure 2 It shows the schematic diagram of the assembly and disassembly device of the permanent magnet motor with a hollow shaft structure.

[0047] Figure 3 It shows the schematic diagram of the structure of the housing fixing jig.

[0048] Figure 4 It shows the schematic diagram of the structure of the housing stop installation assembly.

[0049] Figure 5 It shows the schematic diagram of the structure of the non-drive-end rotor guiding assembly.

[0050] Figure 6 It shows the schematic diagram of the structure of the non-drive-end guiding rod.

[0051] Figure 7 It shows the schematic diagram of the structure of the non-drive-end positioning slideway assembly.

[0052] Figure 7a It shows the schematic diagram of the structure of the non-drive-end positioning slide block.

[0053] Figure 7b It shows the schematic diagram of the structure of the non-drive-end positioning slide plate.

[0054] Figure 8 It shows the schematic diagram of the structure of the non-drive-end rotor hoisting part.

[0055] Figure 9 It shows the schematic diagram of the structure of the bearing guide sleeve at the drive end.

[0056] Figure 10 It shows the schematic diagram of the structure of the dummy bearing cover guide at the drive end.

[0057] Figure 11 It shows the schematic diagram of the structure of the dummy shaft at the drive end.

[0058] Figure 12a It shows the installation schematic diagram of the seat fixing jig, seat stop installation component, non-drive end positioning slide, motor stator seat, and dummy bearing cover guide at the drive end during assembly.

[0059] Figure 12b It shows the installation schematic diagram of the non-drive end guide rod during assembly.

[0060] Figure 12c It shows the schematic diagram of assembling the non-drive end rotor lifting piece, non-drive end positioning slide plate, drive end bearing guide sleeve, and drive end dummy shaft on the rotor during assembly.

[0061] Figure 12d It shows the schematic diagram of the process of the rotor descending during assembly.

[0062] Figure 12e It shows the schematic diagram after the motor stator and rotor are assembled.

[0063] Figure 12e1 It shows Figure 12e Right view.

[0064] Figure 13a It shows the installation schematic diagram of the seat fixing jig, seat stop installation component, non-drive end positioning slide, motor stator seat, dummy bearing cover guide at the drive end, and drive end dummy shaft during disassembly.

[0065] Figure 13b It shows the installation schematic diagram of the non-drive end guide rod, non-drive end rotor lifting piece, and non-drive end positioning slide plate during disassembly.

[0066] Figure 13c It shows the schematic diagram of the rotor ascending during disassembly.

[0067] Figure 13d It shows the schematic diagram of the stator and rotor separating during disassembly.

[0068] In the figure: 1 - fixture for fixing the machine base, 101 - bottom plate, 102 - left support plate, 103 - right support plate, 104 - strip-shaped groove, 105 - reinforcing rib plate; 2 - machine base stop installation assembly, 201 - left stop installation plate, 202 - side plate, 203 - base plate, 204 - right stop installation plate; 3 - non-driving end rotor guiding assembly, 301 - guiding positioning block; 4 - non-driving end guiding rod; 5 - non-driving end positioning slideway assembly, 501 - non-driving end positioning slide plate, 502 - central hole, 503 - through hole, 504 - non-driving end positioning slide base, 505 - dovetail groove; 6 - non-driving end rotor hoisting part, 601 - mounting disc, 602 - hoisting part; 7 - driving end bearing guiding sleeve; 8 - driving end dummy bearing cover guiding part, 801 - shaft hole; 9 - driving end dummy shaft, 901 - dummy shaft, 902 - assembly part; 10 - machine base turning plate; 100 - motor stator machine base, 1001 - left fixing part, 1002 - right fixing part; 200 - rotor, 2001 - driving end bearing cover, 2002 - driving end hollow rotating shaft. Detailed implementation manners

[0069] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0070] A hollow shaft type permanent magnet motor assembly and disassembly device, as Figure 2 shown, includes a fixture 1 for fixing the machine base, a machine base stop installation assembly 2, a non-driving end rotor guiding assembly 3, a non-driving end guiding rod 4, a non-driving end positioning slideway assembly 5, a non-driving end rotor hoisting part 6, a driving end bearing guiding sleeve 7, a driving end dummy bearing cover guiding part 8, a driving end dummy shaft 9, a machine base turning plate 10, etc.

[0071] As Figure 3 shown, the fixture 1 for fixing the machine base includes a bottom plate 101. On the bottom plate 101, a left support plate 102 and a right support plate 103 are symmetrically arranged. On the top surface of the left support plate 102, five threaded holes are provided. On the top surface of the right support plate 103, one light (through) hole and three threaded holes are provided; on the bottom plate 101, a plurality of strip-shaped grooves 104 are provided (in this embodiment, 4 strip-shaped grooves are symmetrically arranged on each side of the left and right support plates respectively, and the positions correspond to the bolt holes on the base turning plate). The fixture 1 for fixing the machine base is fixed on the machine base turning plate 10 through bolts passing through the strip-shaped grooves 104, and the position of the fixture 1 for fixing the machine base on the machine base turning plate 10 is adjusted through the strip-shaped grooves. Reinforcing rib plates 105 are provided on the outer sides of the left support plate 102 and the right support plate 103 to improve the stability of the device.

[0072] As Figure 4As shown, the seat spigot mounting assembly 2 includes a left spigot mounting plate 201 and a right spigot mounting plate 204. The side plate 203 of the left spigot mounting plate 202 is fitted with the left fixing part 1001 of the motor stator seat 100 through a spigot and is provided with holes for bolt connection. The base plate 203 of the left spigot mounting plate 201 is provided with five through holes (the positions corresponding to the five threaded holes on the top surface of the left support plate 102) and is respectively fixedly connected to the left support plate 102 through bolts. The right spigot mounting plate 204 is fitted under the right fixing part 1002 of the motor stator seat 100 through a spigot. The right spigot mounting plate 204 is provided with a threaded hole (its position corresponding to the clearance hole on the top surface of the right support plate) and a plurality of light (through) holes (their positions corresponding to the corresponding threaded holes on the top surface of the right support plate). After a bolt is screwed into the threaded hole of the right spigot mounting plate 204, it is inserted into the through hole of the right support plate 103 for positioning. After a bolt is inserted into the light hole of the right spigot mounting plate 204, it is screwed into the threaded hole of the right support plate 103 for connection and fixation (as Figure 12a shown). This not only realizes the rapid alignment of the hole positions but also avoids the direct contact between the hanging and the support to prevent damage to the hanging.

[0073] As Figure 5 shown, the non-driving end rotor guiding assembly 3 is composed of four identical guiding and positioning blocks 301 assembled together. The four positioning blocks can be bolted together. The non-driving end rotor guiding assembly 3 is fitted at the non-driving end port of the motor stator seat 100 through its outer spigot; the rotor core is fitted through the non-driving end rotor guiding assembly 3, and chamfers are provided on the upper and lower end faces of the inner spigot to facilitate the passage of the rotor.

[0074] As Figure 6 shown, the non-driving end guiding rod 4 is installed in the end face threaded hole at the non-driving end of the motor stator seat 100. Technologically, after heat treatment, the surface is ground to the size, and then the right thread is processed to improve the accuracy of the guiding rod, and at the same time, it has a certain strength and stiffness. Structurally, a hexagonal structure is added at the left end to realize the operation with a pneumatic wrench, which is convenient for operation and reduces the labor intensity.

[0075] As Figure 7 shown, the non-driving end positioning slideway assembly 5 includes a non-driving end positioning slide plate 501 and a non-driving end positioning slide seat 504. As Figure 7a shown, the non-driving end positioning slide seat 504 is fixedly connected to the seat turning plate 10 through the through holes on both sides and bolts (as Figure 12a shown). The non-driving end positioning slide plate 502 is slidably assembled in the dovetail groove of the non-driving end positioning slide seat 504. As Figure 7bAs shown in the figure, through holes 503 for the non-driving end guide rod 4 to pass through are correspondingly provided on the circumference of the non-driving end positioning slide plate 501 (which is aligned with the non-driving end cover hole to facilitate the passing of the guide rod). A central hole 502 is provided in the center thereof, and a groove structure is provided at the end to facilitate its cooperation with the dovetail groove on the non-driving end positioning slide seat to realize sliding, thereby realizing the up and down movement of the guide rotor.

[0076] As Figure 8 shown, the non-driving end rotor hoisting member 6 is integrally composed of a mounting plate 601 and a hoisting part 602. Threaded holes are provided on the left end face to facilitate its connection with the hoisting tool to realize rotor hoisting. The left side shaft surface is connected to the non-driving end positioning slide plate of the non-driving end positioning slideway structure. A stop is provided on the right side to facilitate its cooperation with the non-driving end cover, and holes are provided for connection and fixation. Specifically, the mounting plate 601 is mounted in the middle of the outer end cover of the non-driving end of the rotor through stop cooperation, and the hoisting part 602 passes through the central hole 502 of the non-driving end positioning slide plate 501 and is then connected to the hoisting tool.

[0077] As Figure 9 shown, the driving end bearing guide sleeve 7 can be connected by bolts or other means after being sleeved on the assembly part 902, and is flush with the inner ring 2002 of the bearing outside the hollow rotating shaft 2002 at the driving end of the rotor. A chamfer is provided at the end of the driving end bearing guide sleeve 7 for guiding the outer ring of the bearing passing through the driving end. The driving end bearing guide sleeve is provided with installation and disassembly threaded holes. To prevent thread scratching during the assembly and disassembly of the driving end bearing guide sleeve, a wire thread insert is provided. In practice, the material of the driving end bearing guide sleeve is selected as nylon during assembly, and brass during disassembly, which can protect the bearing during assembly and disassembly.

[0078] As Figure 10 shown, the driving end dummy bearing cover guide 8 is mounted on the driving end bearing cover 2001 of the motor stator frame 100 by stop cooperation and then bolted. The driving end dummy bearing cover guide 8 is provided with a shaft hole 801 for the dummy shaft 901 to pass through. It cooperates with the driving end dummy shaft to realize the up and down movement of the rotor. A chamfer is provided in the shaft hole to facilitate the passing of the driving end dummy shaft. A weight-reducing hole is provided, and its overall structure is a "shaft-holding type" to realize the positioning of the stator and rotor, avoid assembly deviation, and ensure the assembly quality.

[0079] As Figure 11As shown in the figure, the drive-end dummy shaft 9 is composed of a dummy shaft 901 and an assembly part 902. The dummy shaft 901 is a hollow shaft. The assembly part 902 is installed on the end face of the hollow rotating shaft by bolts after its outer stop surface is fitted with the inner stop surface of the hollow rotating shaft 2002 at the drive end of the rotor. A stop surface is provided at the left end of the drive-end dummy shaft to fit with the inner stop surface of the drive-end rotor, a chamfer is provided for convenient installation, a screw hole is provided for fixation by bolts, a long shaft is provided at the right end, a weight-reducing hole is provided, and the outer cylindrical surface is fitted with the shaft hole of the drive-end dummy bearing cover to achieve directional movement, thereby realizing the assembly of the stator and rotor; the protective backing plate is assembled on the end face of the screw hole on the left side of the dummy shaft, and it is provided with screw holes (two fewer screw holes are provided at the symmetric positions than the dummy shaft, and the rest are the same) at the same position as the dummy shaft, which can realize the assembly of the dummy shaft; when disassembling, a pneumatic wrench is used to hit the protective backing plate through the jackscrew hole of the drive-end dummy shaft to effectively protect the shaft head, avoid damage and scratching of the shaft head end face, and use the pneumatic wrench to jog for disassembly during operation, which can effectively protect the motor stop surface, reduce labor intensity, and improve product quality.

[0080] The strength of the seat flap structure only needs to be able to realize the switching between the horizontal and vertical directions.

[0081] An assembly method for a hollow-shaft type permanent magnet motor includes the following steps:

[0082] 1). As Figure 12a shown in the figure, place the seat flap 10 horizontally, and fixedly install the seat fixing jig 1 on the predetermined position of the seat flap 10 by bolts; fixedly install the non-drive-end positioning slide 504 on the predetermined position of the seat flap 10 by bolts.

[0083] 2). Install the drive-end dummy bearing cover guide 8 on the drive-end bearing cover 2001 of the motor stator seat 100 by bolts after fitting with the stop surface.

[0084] 3). As Figure 12a shown in the figure, install the left stop surface mounting plate 201 and the right stop surface mounting plate 204 on the left and right preset positions of the motor stator seat 100 respectively, and screw the positioning bolt into the threaded hole of the right stop surface mounting plate 204. Then lift the motor stator seat 100 above the seat fixing jig 1, and realize positioning through the cooperation of the positioning bolt and the light hole on the right support plate 103. Then fix the left stop surface mounting plate 201 and the right stop surface mounting plate 204 on the upper end faces of the left support plate 102 and the right support plate 103 of the seat fixing jig 1 respectively.

[0085] 4). Assemble the non-drive-end end cover at the non-drive end of the rotor in advance, and assemble the inner ring of the bearing at its drive end. As Figure 12cAs shown in the figure, the dummy shaft 9 at the drive end is installed on the end face of the hollow rotating shaft 2002 at the drive end of the rotor by means of a spigot fit and bolts; then the bearing guide sleeve 7 at the drive end is sleeved on the assembly part 902 and is flush with the inner ring 2002 of the bearing outside the hollow rotating shaft at the drive end of the rotor; the lifting part 6 at the non-drive end of the rotor is fixed and installed on the outer end cover at the non-drive end of the rotor by means of a spigot fit and bolts.

[0086] 5), as Figure 12b shown in the figure, the base turning plate 10 is placed vertically by means of a lifting tool, and at this time the non-drive end of the motor stator base faces upward; the non-drive end rotor guiding assembly 3 is placed at the port of the non-drive end of the motor stator base 100 by means of a spigot fit; the non-drive end guiding rod 4 is screwed into the end face screw hole at the non-drive end of the motor stator base 100.

[0087] 6), as shown in Fig. 12d, the non-drive end positioning slide plate 501 is fitted with the lifting part 6 at the non-drive end of the rotor, and then the rotor is lifted to the vertical state by means of the lifting part 6 at the non-drive end of the rotor for preliminary alignment above the motor stator base 100; then the rotor descends smoothly under the simultaneous positioning action at the non-drive end and the drive end, that is: the non-drive end positioning slide plate 501 fits and slides into the chute of the non-drive end positioning slide seat 504, the non-drive end guiding rod 4 sequentially passes through the threaded hole of the outer end cover at the non-drive end and the corresponding through hole 503 on the non-drive end positioning slide plate 501, and the rotor enters the interior of the motor stator base 100 along the non-drive end rotor guiding assembly 3, and the dummy shaft 901 at the drive end fits through the shaft hole 801 of the drive end dummy bearing cover guiding part 8.

[0088] 7), when the outer end cover at the non-drive end of the rotor descends to a suitable position from the non-drive end spigot of the motor stator base, part of the non-drive end guiding rod 4 is taken out, the non-drive end rotor guiding assembly 3 is disassembled and taken out, and then the non-drive end guiding rod 4 is reinstalled. As Figure 12e and Figure 12e1 shown in the figure, the rotor continues to descend until the inner ring of the bearing at the drive end fits into the outer ring of the bearing at the drive end of the base, realizing the assembly of the stator and rotor; finally, all devices are removed.

[0089] Similarly, a disassembly method for a hollow shaft type permanent magnet motor includes the following steps:

[0090] 1), as Figure 13a shown in the figure, the base turning plate 10 is placed horizontally, the base fixing fixture 1 is fixedly installed on the base turning plate 10 at a predetermined position by bolts; the non-drive end positioning slide seat 504 is fixedly installed on the base turning plate 10 at a predetermined position by bolts.

[0091] 2), as Figure 13aAs shown, install the left rabbet mounting plate 201 and the right rabbet mounting plate 204 at the preset positions on the left and right sides of the motor stator frame 100 respectively. Screw a positioning bolt into the threaded hole of the right rabbet mounting plate 204. Then lift the motor stator frame 100 above the frame fixing jig 1, and achieve positioning through the cooperation of the positioning bolt and the light hole on the right support plate 103. Then fix the left rabbet mounting plate 201 and the right rabbet mounting plate 204 on the upper end faces of the left support plate 102 and the right support plate 103 of the frame fixing jig 1 respectively.

[0092] 3), as Figure 13a shown, install the drive end dummy shaft 9 on the end face of the hollow rotating shaft at the drive end of the rotor through rabbet fit and bolt connection. Then sleeved the drive end bearing guide sleeve 7 on the assembly part 902 until it is flush with the inner ring of the bearing outside the hollow rotating shaft 2002 at the drive end of the rotor. Fix the non-drive end rotor lifting part 6 on the outer end cover at the non-drive end of the rotor through rabbet fit and then bolt connection.

[0093] 4), as Figure 13a shown, install the drive end dummy bearing cover guide part 8 on the drive end bearing cover of the motor stator frame 100 through rabbet fit and then bolt connection.

[0094] 5), as Figure 13b shown, place the frame turning plate 10 vertically through the lifting tool. At this time, the non-drive end of the motor stator frame faces upward. Remove the bolts of the non-drive end mounting end cover in sequence, and pass the non-drive end guide rod 4 through the end cover screw holes at the non-drive end and screw it into the end face screw holes of the motor stator frame. Then the non-drive end positioning slide plate 501 slides into the chute of the non-drive end positioning slide base 504 and descends to cooperate with the non-drive end rotor lifting part 6. At this time, the non-drive end guide rod 4 correspondingly passes through the through hole 503 of the non-drive end positioning slide plate 501, and the lifting part 602 of the non-drive end rotor lifting part 6 passes through the central hole 502 of the non-drive end positioning slide plate 501.

[0095] 6), as Figure 13c shown, lift the rotor through the non-drive end rotor lifting part 6. Then the rotor smoothly ascends under the simultaneous positioning of the non-drive end and the drive end, that is: the outer end cover at the non-drive end of the rotor ascends along the non-drive end guide rod 4, the drive end dummy shaft 901 ascends along the shaft hole 801 of the drive end dummy bearing cover guide part 8, and the inner ring and outer ring of the bearing are guided and separated through the drive end bearing guide sleeve 7.

[0096] 7), as Figure 13c shown, when the outer end cover at the non-drive end of the rotor ascends to a suitable position from the non-drive end rabbet of the motor stator frame, take out part of the non-drive end guide rod 4, disassemble the non-drive end rotor guide assembly 3 and place it at the port of the non-drive end of the motor stator frame 100 through rabbet fit; as Figure 13dAs shown, then reinstall the non-driving end guide rod 4, and the rotor continues to move upward along the non-driving end rotor guide assembly 3 until the stator and rotor are separated; finally, remove all devices.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the protection scope of the claims of the present invention.

Claims

1. A device for assembling and disassembling a hollow-shaft permanent magnet motor, characterized in that: it includes a base fixing jig, a base stop installation component, a non-drive end rotor guiding component, a non-drive end guiding rod, a non-drive end positioning slideway component, a non-drive end rotor lifting piece, a drive end bearing guiding sleeve, a drive end dummy bearing cover guiding piece, a drive end dummy shaft, and a base turning plate; the base fixing jig includes a bottom plate, on which left and right support plates are symmetrically arranged. On the top surface of the left support plate, there are a plurality of threaded holes, and on the top surface of the right support plate, there is at least one light hole and a plurality of threaded holes; the base fixing jig is fixed on the base turning plate; the base stop installation component includes a left stop installation plate and a right stop installation plate; the side plate of the left stop installation plate is matched with the left fixing part of the motor stator base through a stop and provided with holes for bolt connection. The base plate of the left stop installation plate is provided with holes for bolted connection to the left support plate; the right stop installation plate is located below the right fixing part of the motor stator base through stop matching. The right stop installation plate is provided with at least one threaded hole and a plurality of through holes, and their positions correspond to the holes on the right fixing part of the motor stator base. After a bolt is screwed into the threaded hole of the right stop installation plate, it is inserted into the light hole of the right support plate for positioning. After a bolt is inserted into the light hole of the right stop installation plate, it is screwed into the threaded hole of the right support plate for connection and fixation; the non-drive end rotor guiding component is composed of a plurality of identical guiding and positioning blocks assembled together. The non-drive end rotor guiding component is located at the non-drive end port of the motor stator base through its outer stop matching; the inner stop of the non-drive end rotor guiding component passes through the rotor core; the non-drive end guiding rod is installed in the end face threaded hole of the non-drive end of the motor stator base; the non-drive end positioning slideway component includes a non-drive end positioning slide plate and a non-drive end positioning slide seat; the non-drive end positioning slide seat is fixedly connected to the base turning plate, the non-drive end positioning slide plate is slidably assembled on the non-drive end positioning slide seat, and through holes for the non-drive end guiding rod to pass through are correspondingly arranged on the circumference of the non-drive end positioning slide plate; the non-drive end rotor lifting piece is composed of a mounting plate and a lifting part. The mounting plate is fixedly installed in the middle of the outer end cover at the non-drive end of the rotor through stop matching, and the lifting part passes through the central hole of the non-drive end positioning slide plate; the drive end dummy shaft is composed of a dummy shaft and an assembly part. The assembly part is matched with the inner stop of the hollow rotating shaft at the drive end of the rotor through its outer stop and then installed on the end face of the hollow rotating shaft with bolts; the drive end bearing guiding sleeve is sleeved on the assembly part and is flush with the inner ring of the bearing outside the hollow rotating shaft at the drive end of the rotor; the drive end dummy bearing cover guiding piece is installed on the drive end bearing cover of the motor stator base with bolts through stop matching, and the drive end dummy bearing cover guiding piece is provided with a shaft hole for the dummy shaft to pass through.

2. The device for assembling and disassembling a hollow-shaft permanent magnet motor according to claim 1, characterized in that: a plurality of strip-shaped grooves are provided on the bottom plate, and the base fixing jig is fixed on the base turning plate through bolts passing through the strip-shaped grooves.

3. The assembly and disassembly device for a hollow shaft type permanent magnet motor according to claim 2, characterized in that: Reinforcing rib plates are provided on the outer sides of the left support plate and the right support plate.

4. The assembly and disassembly device for a hollow shaft type permanent magnet motor according to claim 3, characterized in that: The dummy shaft is a hollow shaft.

5. The assembly and disassembly device for a hollow shaft type permanent magnet motor according to claim 4, characterized in that: The non-driving end positioning slide plate and the non-driving end positioning slide seat are in dovetail groove type fit.

6. The assembly and disassembly device for a hollow shaft type permanent magnet motor according to claim 5, characterized in that: Chamfers are provided at both ends of the driving end bearing guide sleeve.

7. An assembly method for a hollow shaft type permanent magnet motor, characterized in that: It includes the following steps: 1). Horizontally place the base turning plate, and fixedly install the base fixing jig on the predetermined position of the base turning plate through bolts; fixedly install the non-driving end positioning slide seat on the predetermined position of the base turning plate through bolts; 2). After the driving end dummy bearing cover guide is in mating with the spigot, install it on the driving end bearing cover of the motor stator base through bolts; 3). Install the left spigot mounting plate and the right spigot mounting plate on the left and right preset positions of the motor stator base respectively, and screw a positioning bolt into the threaded hole of the right spigot mounting plate; then lift the motor stator base above the base fixing jig, and realize positioning through the cooperation of the positioning bolt and the light hole on the right support plate, and then fix the left spigot mounting plate and the right spigot mounting plate on the upper end faces of the left support plate and the right support plate of the base fixing jig respectively; 4). Assemble the non-driving end cover at the non-driving end of the rotor in advance, and assemble the bearing inner ring at its driving end; install the driving end dummy shaft on the end face of the hollow rotating shaft at the driving end of the rotor through bolts after mating with the spigot; then sleeved the driving end bearing guide sleeve on the assembly part and make it flush with the bearing inner ring outside the driving end hollow rotating shaft of the rotor; fixedly install the non-driving end rotor hoisting part on the outer end cover at the non-driving end of the rotor through bolts after mating with the spigot; 5). Vertically place the base turning plate, and at this time the non-driving end of the motor stator base faces upward; place the non-driving end rotor guiding assembly at the port of the non-driving end of the motor stator base after mating with the spigot; screw the non-driving end guiding rod into the end face threaded hole of the non-driving end of the motor stator base; 6). Mate the non-driving end positioning slide plate with the non-driving end rotor hoisting part, and then lift the rotor to the vertical state through the non-driving end rotor hoisting part for preliminary alignment above the motor stator base; then the rotor smoothly descends under the simultaneous positioning of the non-driving end and the driving end, that is: the non-driving end positioning slide plate fits into the chute of the non-driving end positioning slide seat, the non-driving end guiding rod sequentially passes through the threaded hole of the outer end cover at the non-driving end and the corresponding through hole on the non-driving end positioning slide plate, and the rotor enters the inside of the motor stator base along the non-driving end rotor guiding assembly, and the dummy shaft at the driving end fits through the shaft hole of the driving end dummy bearing cover guide; 7), when the outer end cover of the non-drive end of the rotor descends to a suitable position from the non-drive end stop of the motor stator frame, take out some of the non-drive end guide rods, disassemble and take out the non-drive end rotor guide assembly, then reinstall the non-drive end guide rods, and the rotor continues to descend until the inner ring of the bearing at the drive end fits into the outer ring of the bearing at the drive end of the motor stator frame to achieve the assembly of the stator and rotor; finally, remove all devices.

8. A disassembly method for a hollow shaft type permanent magnet motor, characterized in that: it comprises the following steps: 1), horizontally place the base turning plate, and fixedly install the base fixing jig at a predetermined position on the base turning plate through bolts; fixedly install the non-drive end positioning slide seat at a predetermined position on the base turning plate through bolts; 2), respectively install the left stop mounting plate and the right stop mounting plate at the preset positions on the left and right sides of the motor stator frame, and screw a positioning bolt into the threaded hole of the right stop mounting plate; then lift the motor stator frame above the base fixing jig, and achieve positioning through the cooperation of the positioning bolt and the light hole on the right support plate, and then respectively fix the left stop mounting plate and the right stop mounting plate on the upper end surfaces of the left support plate and the right support plate of the base fixing jig; 3), install the drive end dummy shaft on the end face of the hollow rotating shaft at the drive end of the rotor through stop fit and bolts; then sleeved the drive end bearing guide sleeve on the assembly part and flush it with the inner ring of the bearing outside the hollow rotating shaft at the drive end of the rotor; fixedly install the non-drive end rotor hoisting part on the outer end cover at the non-drive end of the rotor through stop fit and bolts; 4), install the drive end dummy bearing cover guide part on the drive end bearing cover of the motor stator frame through stop fit and bolts; 5), vertically place the base turning plate, at this time the non-drive end of the motor stator frame faces upward; sequentially disassemble the bolts of the non-drive end mounting end cover, and pass the non-drive end guide rod through the end cover screw hole at the non-drive end and screw it into the end face screw hole of the motor stator frame; then the non-drive end positioning slide plate fits and slides into the chute of the non-drive end positioning slide seat, and descends to cooperate with the non-drive end rotor hoisting part. At this time, the non-drive end guide rod correspondingly passes through the through hole of the non-drive end positioning slide plate, and the hanging part of the non-drive end rotor hoisting part passes through the central hole of the non-drive end positioning slide plate; 6), lift the rotor through the non-drive end rotor hoisting part; then the rotor smoothly ascends under the simultaneous positioning of the non-drive end and the drive end, that is: the outer end cover of the non-drive end of the rotor ascends along the non-drive end guide rod, the drive end dummy shaft ascends along the shaft hole of the drive end dummy bearing cover guide part, and the inner ring and the outer ring of the bearing are guided and separated through the non-drive end bearing guide sleeve; 7), when the outer end cover of the non-drive end ascends to a suitable position from the non-drive end stop of the motor stator frame, take out some of the non-drive end guide rods, disassemble the non-drive end rotor guide assembly and place it at the port of the non-drive end of the motor stator frame through stop fit; then reinstall the non-drive end guide rods, and the rotor continues to ascend along the non-drive end rotor guide assembly until the stator and rotor are separated; finally, remove all devices.

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