Permanent magnet synchronous motor disassembling auxiliary tool and disassembling method

Abstract

The auxiliary tool comprises an upper circular ring and a lower circular ring which are coaxially arranged, the upper circular ring and the lower circular ring are fixedly connected through at least two supporting columns, the upper circular ring is provided with a plurality of first through holes, the lower circular ring is provided with a plurality of second through holes for fixing the lower circular ring, and the first through holes are communicated with the second through holes. Fixing pieces are accommodated in the first through hole and the second through hole; and when the projection of the mounting hole of the motor shell is located on the upper circular ring, the motor shell is mounted at the top of the upper circular ring through the fixing piece and the first through hole, and through the application, the permanent magnet synchronous motor can be fixed, and a good disassembly environment is created.

Description

Technical Field

[0001] The present application relates to the field of permanent magnet synchronous motor structure, and in particular to a permanent magnet synchronous motor disassembly auxiliary tooling and a disassembly method. Background Art

[0002] In recent years, with the global emphasis on sustainable development and environmental protection, the new energy vehicle industry has developed rapidly. As a core component of new energy vehicles, the technology of permanent magnet synchronous motors has been continuously innovated to meet the growing market demand. Permanent magnet synchronous motors are a type of motor that uses permanent magnets to generate a fixed magnetic field, and the rotating magnetic field generated by the stator winding interacts with the permanent magnet magnetic field to generate torque. It is responsible for converting electrical energy into mechanical energy to drive the vehicle.

[0003] However, in actual applications, permanent magnet synchronous motors have various faults such as magnetic steel demagnetization, insulation paint damage, bearing wear and failure, etc., which cause the motor output power to drop, noise to increase, and even shutdown failure, which makes the car unable to start. Therefore, regular inspection and maintenance of permanent magnet synchronous motors is essential. However, during the disassembly of permanent magnet synchronous motors, the following situations often occur: 1. Shaking due to unstable force, or even sudden displacement of the initial position during disassembly of the permanent magnet synchronous motor to be disassembled, damaging key components; 2. Although there are some differences in the structure of different types of permanent magnet synchronous motors, most of them will be coated with glue between the end cover and the shell, and the permanent magnet synchronous motor after coating with glue is more difficult to disassemble; 3. On the rotor of the permanent magnet synchronous motor, a certain number of magnets are fixed on the iron core to form a strong magnetic field. During disassembly, the magnetic force will cause the rotor to be attracted, making it difficult to disassemble the rotor.

[0004] In view of the above situations, if the permanent magnet synchronous motor is not fixed, it will greatly increase the difficulty of the permanent magnet synchronous motor, and lead to slow disassembly efficiency and increase time cost. Therefore, it is urgent to invent a permanent magnet synchronous motor auxiliary tooling to fix the permanent magnet synchronous motor and create a good disassembly environment. Summary of the invention

[0005] The present application provides a permanent magnet synchronous motor disassembly auxiliary tooling and a disassembly method, which can fix the permanent magnet synchronous motor and create a good disassembly environment.

[0006] In the first aspect, the embodiment of the present application provides a permanent magnet synchronous motor disassembly auxiliary tooling, including: an upper ring and a lower ring, the two are coaxially arranged, the upper ring and the lower ring are fixedly connected by at least two support columns, the upper ring is provided with a plurality of first through holes, the lower ring is provided with a plurality of second through holes for fixing itself, and the first through holes and the second through holes contain fixing parts. When the mounting hole of the motor housing is projected on the upper ring, the motor housing is installed on the top of the upper ring through the fixing parts and the first through holes.

[0007] In combination with the first aspect, in one embodiment, a fixing ring is further included, the fixing ring is provided with a plurality of third through holes corresponding to the first through holes, and a plurality of fourth through holes. When the projection position of the mounting hole of the motor housing exceeds the edge range of the upper circular ring, the fixing ring is installed on the top of the upper circular ring, and the first through hole and the third through hole are connected by a fixing member; the motor housing is installed on the top of the fixing ring, and the mounting hole of the motor housing is connected to the fourth through hole by a fixing member.

[0008] In combination with the first aspect, in one embodiment, the fixing ring is divided into an inner ring area and an outer ring area which are coaxially arranged, the third through hole is located in the inner ring area, and the fourth through hole is located in the outer ring area.

[0009] In the second aspect, an embodiment of the present application provides a permanent magnet synchronous motor disassembly method based on the above-mentioned permanent magnet synchronous motor disassembly auxiliary tooling, including: removing the junction box cover, the rotary transformer cover and surface parts; first removing the wiring harness, and then removing the junction box and the rotary transformer, and the wiring harness is arranged in the junction box cover; using the auxiliary tooling to fix the shell on the workbench, and separate the shell, end cover, rotor and stator respectively in a preset order; removing the auxiliary tooling.

[0010] In combination with the second aspect, in one embodiment, before the step of removing the junction box cover, the rotary transformer cover and the surface parts, it also includes: judging the type of motor; if the motor is a water-cooled motor, the surface parts of the motor are the water inlet and outlet; if the motor is an oil-cooled motor, the surface parts of the motor are the oil pump and the heat exchanger.

[0011] In conjunction with the second aspect, in one embodiment, the step of first removing the wiring harness and then removing the junction box and the rotary transformer includes: when the junction box includes a high-voltage junction box and a low-voltage junction box, the high-voltage junction box is provided with a high-voltage wiring harness, and the low-voltage junction box is provided with a low-voltage wiring harness, the wiring harness in each junction box is first removed, and then the junction boxes and the rotary transformer are removed. When the junction box is only a high-voltage junction box, and the high-voltage junction box is provided with both a high-voltage wiring harness and a low-voltage wiring harness, the wiring harness in the high-voltage junction box is first removed, and then the high-voltage junction box and the rotary transformer are removed.

[0012] In combination with the second aspect, in one embodiment, when the projection position of the mounting hole of the motor housing exceeds the edge range of the upper ring, the permanent magnet synchronous motor disassembly auxiliary tooling also includes a fixing ring, and the fixing ring is provided with a plurality of third through holes corresponding to the first through holes, and a plurality of fourth through holes. The step of using the auxiliary tooling to fix the housing on the workbench includes: firstly installing the lower ring of the auxiliary tooling on the workbench through the fixing piece and the second through hole, and then placing the fixing ring on the top of the upper ring, and connecting the first through hole and the third through hole through the fixing piece; placing the motor housing on the top of the fixing ring, and connecting the mounting hole of the motor housing with the fourth through hole through the fixing piece.

[0013] In combination with the second aspect, in one embodiment, the steps of separating the shell, end cover, rotor and stator respectively in a preset order include: separating the shell from the end cover and taking out the rotor in the shell; separating the end cover from the rotor fixed on the inner side of the end cover; separating the shell from the stator fixed in the shell.

[0014] In combination with the second aspect, in one embodiment, the step of separating the end cover from the rotor fixed on the inner side of the end cover includes: if the shaft of the rotor cannot be separated from the bearing in the bearing chamber fixed on the inner side of the end cover, and the bearing chamber pressure plate cannot be disassembled before the rotor is separated, knock the shaft of the rotor inward on the outer side of the end cover until the rotor is separated from the end cover.

[0015] In combination with the second aspect, in one embodiment, the step of separating the shell from the stator fixed in the shell includes: placing the shell and the stator fixed in the shell into a high-temperature oven, heating them at a preset temperature for a preset time, taking them out, and then ejecting the stator from the shell to complete the separation.

[0016] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:

[0017] The upper ring and the lower ring are fixedly connected by at least two support columns, and the lower ring is fixed to the workbench (or the ground) through the second through hole and the fixing member. When the projection of the mounting hole of the motor housing is located on the upper ring, the motor housing is fixedly installed on the top of the upper ring through the fixing member and the first through hole, so that a stable support structure can be formed, ensuring that the auxiliary tooling can fully withstand the full weight of the motor in structure, and is also conducive to the disassembly and installation of the motor housing. In addition, by arranging the upper ring and the lower ring coaxially, the ring centers of the two are relative, forming a accommodating space, when the motor is fixed, it is convenient to place the shaft of the motor rotor. Through the present application, the permanent magnet synchronous motor can be effectively fixed, and a good disassembly environment can be created. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a permanent magnet synchronous motor disassembly auxiliary tooling in an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of a fixing ring in an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the process of disassembling a permanent magnet synchronous motor in the first embodiment of the present application;

[0021] Figure 4 It is a schematic flow chart of a method for disassembling a permanent magnet synchronous motor in another embodiment of the present application.

[0022] Figure 1 :

[0023] 1. upper ring; 11. first through hole;

[0024] 2. lower ring; 21. second through hole;

[0025] 3. Support column;

[0026] 4. Fixed ring; 41. Inner ring area; 411. Third through hole; 42. Outer ring area; 421. Fourth through hole. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0029] The present application provides a permanent magnet synchronous motor disassembly auxiliary tooling and a disassembly method, which can fix the permanent magnet synchronous motor and create a good disassembly environment.

[0030] In a first aspect, an embodiment of the present application provides a permanent magnet synchronous motor disassembly auxiliary tool (referred to as "auxiliary tool").

[0031] Reference Figure 1 , Figure 1 Schematic diagram of the permanent magnet synchronous motor disassembly auxiliary tooling in the embodiment of the present application. Figure 1As shown, in one embodiment, the permanent magnet synchronous motor disassembly auxiliary tooling includes an upper ring 1 and a lower ring 2, which are coaxially arranged, and the upper ring 1 and the lower ring 2 are fixedly connected by at least two support columns 3. The upper ring 1 is provided with a plurality of first through holes 11, and the lower ring 2 is provided with a plurality of second through holes 12 for fixing itself, and the first through holes 11 and the second through holes 12 contain fixing parts. When the mounting hole of the motor housing is projected on the upper ring 1, the motor housing is installed on the top of the upper ring 1 through the fixing parts and the first through holes 11.

[0032] Among them, the upper ring 1 is located directly above the lower ring 2, and the two are fixedly connected by at least two support columns 3, and a certain distance is maintained. The size of the lower ring 2 is greater than or equal to the size of the upper ring 1. The first through hole 11 of the upper ring 1 is processed according to the mounting hole of the motor housing, and can be directly used to fix the motor housing; the second through hole 12 of the lower ring 2 cooperates with the fixing hole on the workbench (or the ground), and can be used to fix the lower ring 2 itself (or the entire auxiliary tooling), and the fixing part can be a bolt or a stud.

[0033] In this embodiment, the upper ring 1 and the lower ring 2 are fixedly connected by at least two support columns 3, and the lower ring 2 is fixedly mounted on the workbench (or the ground) through the second through hole 12 and the fixing member. When the mounting hole projection of the motor housing is located on the upper ring 1, the motor housing is fixedly mounted on the top of the upper ring 1 through the first through hole 11 and the fixing member, so that a stable support structure can be formed, ensuring that the auxiliary tooling can fully withstand the full weight of the motor in structure, and is also conducive to the disassembly and installation of the motor housing. In addition, by arranging the upper ring 1 and the lower ring 2 coaxially, so that the ring centers of the two are relative, a accommodating space is formed, and when the motor is fixed, it is convenient to place the shaft of the motor rotor. Through this embodiment, the permanent magnet synchronous motor can be effectively fixed and a good disassembly environment can be created.

[0034] Further, in one embodiment, referring to Figure 2 , Figure 2 Schematic diagram of the fixing ring 4 in the embodiment of the present application. Figure 2 As shown, the auxiliary tooling also includes a fixing ring 4 , which is provided with a plurality of third through holes 411 corresponding to the first through holes 11 , and a plurality of fourth through holes 421 .

[0035] When the projection position of the mounting hole of the motor housing exceeds the edge range of the upper ring 1, the fixing ring 4 is installed on the top of the upper ring 1, and the first through hole 11 and the third through hole 411 are connected by a fixing member; the motor housing is installed on the top of the fixing ring 4, and the mounting hole of the motor housing is connected to the fourth through hole 421 by a fixing member.

[0036] In this embodiment, the auxiliary tooling in the previous embodiment can basically meet the fixing requirements of most permanent magnet synchronous motors. However, there are still a few permanent magnet synchronous motors that have some differences in structure, and the projection of the mounting hole of the motor housing will exceed the edge range of the upper ring 1 of the auxiliary tooling. Therefore, it is necessary to redesign a fixing ring 4 in advance according to the mounting hole of the motor housing. The fixing ring 4 is provided with a number of third through holes 411 corresponding to the first through holes 11, and a number of fourth through holes 421. When the projection position of the mounting hole of the motor housing exceeds the edge range of the upper ring 1, the fixing ring 4 designed and manufactured in advance is fixedly connected to the third through hole 411 and the first through hole 11 by a fixing member, and then fixedly installed on the top of the upper ring 1; the motor housing is then fixedly connected to the fourth through hole 421 and the mounting hole of the motor housing by a fixing member, and then fixedly installed on the top of the fixing ring 4. In this way, the effect of switching can be achieved, and some special permanent magnet synchronous motors can be fixed.

[0037] Further, in one embodiment, if Figure 2 As shown, the fixing ring 4 is divided into a coaxially arranged inner ring area 41 and an outer ring area 42, the third through hole 411 is located in the inner ring area 41, and the fourth through hole 421 is located in the outer ring area 42. In this embodiment, by dividing the fixing ring 4 into a coaxially arranged inner ring area 41 and an outer ring area 42, and arranging the third through hole 411 in the inner ring area 41 and the fourth through hole 421 in the outer ring area 42, it is convenient to accurately align the fixing ring 4 with the upper circular ring 1, which is conducive to improving the accuracy and efficiency of installation.

[0038] In a second aspect, an embodiment of the present application provides a permanent magnet synchronous motor disassembly method based on the above-mentioned permanent magnet synchronous motor disassembly auxiliary tooling.

[0039] Reference Figure 3 , Figure 3 FIG. 1 is a flow chart of the method for disassembling a permanent magnet synchronous motor in the first embodiment of the present application. Figure 3 As shown, the permanent magnet synchronous motor disassembly method includes:

[0040] Step S10, removing the junction box cover, the rotary transformer cover and surface parts.

[0041] In this embodiment, when disassembling the motor, the junction box cover, the rotary transformer cover and the surface parts are first removed, which is conducive to observing the arrangement of the wiring harness inside the junction box and facilitates the subsequent removal of the wiring harness. It should be noted here that different types of permanent magnet synchronous motors may have some differences in structure. For example, some permanent magnet synchronous motors have junction boxes including high-voltage junction boxes and low-voltage junction boxes; some permanent magnet synchronous motors have junction boxes only with high-voltage junction boxes. In addition, different types of permanent magnet synchronous motors will have different surface parts. For example, the surface parts of water-cooled motors and oil-cooled motors are different.

[0042] Furthermore, in one embodiment, before step 10, the method further includes:

[0043] Determine the motor type; if the motor is a water-cooled motor, the surface parts of the motor are the water inlet and outlet; if the motor is an oil-cooled motor, the surface parts of the motor are the oil pump and heat exchanger.

[0044] In this embodiment, before disassembling the motor, the corresponding motor type can be searched and determined in the database according to the structural characteristics and functions of the motor; and the surface parts of the motor can be further determined according to the motor type. If the motor is a water-cooled motor, the surface parts of the motor are the water inlet and outlet; if the motor is an oil-cooled motor, the surface parts of the motor are the oil pump and the heat exchanger. In this way, when the motor is disassembled, the disassembly tools for the corresponding surface parts can be prepared in advance, and which surface parts are not removed will not be missed, which not only improves the disassembly efficiency, but also ensures the accuracy of the motor disassembly.

[0045] Step S20, first remove the wire harness, then remove the junction box and the rotary transformer, and the wire harness is arranged in the junction box cover.

[0046] In this embodiment, the wiring harness is arranged in the junction box cover, that is, the wiring harness is installed in the junction box and then covered with the junction box cover. The wiring harness in the junction box is removed first, and then the junction box and the rotary transformer are removed, so as to avoid the wiring harness directly affecting the removal progress of the junction box and the rotary transformer. In this embodiment, if the motor has both a high-voltage junction box and a low-voltage junction box, a high-voltage wiring harness is arranged in the high-voltage junction box, and a low-voltage wiring harness is arranged in the low-voltage junction box; if the motor has only one high-voltage junction box, the high-voltage junction box is provided with both a high-voltage wiring harness and a low-voltage wiring harness, and the difference lies in the different outlet positions.

[0047] Furthermore, in one embodiment, step 20 includes:

[0048] When the junction box includes a high-voltage junction box and a low-voltage junction box, a high-voltage wiring harness is provided in the high-voltage junction box and a low-voltage wiring harness is provided in the low-voltage junction box, first remove the wiring harness in each junction box, and then remove each junction box and the rotary transformer.

[0049] In this embodiment, generally speaking, the junction box of the motor will include a high-voltage junction box and a low-voltage junction box. The high-voltage junction box will be equipped with a high-voltage wiring harness, which usually adopts special insulating materials and structures to meet higher safety requirements; the low-voltage junction box will be equipped with a low-voltage wiring harness, which is relatively simple, and the insulation and protection requirements of the low-voltage wiring harness are also relatively low.

[0050] In this embodiment, when removing the high-voltage wiring harness, the fixing screws between the high-voltage wiring harness and the terminal block on the junction box must be removed first, and then the needle withdrawer is used to withdraw the needle. When removing the low-voltage wiring harness, it is necessary to determine whether there is a low-voltage connector fixed to the low-voltage junction box. If so, first remove the fixing screws of the low-voltage connector and then use the needle withdrawer to withdraw the needle; if not, withdraw the needle directly. If the high-voltage junction box / low-voltage junction box and the end cover are separate parts, remove the junction box after removing the wiring harness. The rotary transformer is generally fixedly installed in the center of the front cover of the motor or the rear cover of the motor. When the rotary transformer is removed, use a screw gun to remove the rotary transformer pressure plate and the fixing screws that fix the rotary transformer, and then take out the rotary transformer. This part is prior art and will not be repeated here.

[0051] When the junction box is only a high-voltage junction box, and both a high-voltage wiring harness and a low-voltage wiring harness are provided in the high-voltage junction box, the wiring harness in the high-voltage junction box is first removed, and then the high-voltage junction box and the rotary transformer are removed.

[0052] In this embodiment, when the junction box is only a high-voltage junction box, a high-voltage wiring harness and a low-voltage wiring harness are provided in the high-voltage junction box at the same time, and the low-voltage wiring harness needs to be made of a material that can shield interference. After removing the wiring harness in the high-voltage junction box, each junction box and the rotary transformer are removed, which is consistent with the removal method of the previous embodiment and will not be repeated here.

[0053] Step S30, using auxiliary tooling to fix the shell on the workbench, and separating the shell, the end cover, the rotor and the stator respectively according to a preset sequence.

[0054] Step S40, removing the auxiliary tooling.

[0055] In this embodiment, before the motor is disassembled, holes are drilled on the workbench (or the ground) in advance, and the hole positions are made to correspond one-to-one with the second through holes 12 of the lower ring 2 of the auxiliary tooling. When the motor is disassembled, the shell is fixed on the workbench using the auxiliary tooling. After the shell is fixed, the shell, end cover, rotor and stator can be separated respectively in a preset order to ensure smooth disassembly of the motor. After the motor is disassembled, the auxiliary tooling is directly removed to end the disassembly operation of the motor.

[0056] Further, in one embodiment, referring to Figure 4 , Figure 4FIG. 1 is a flow chart of a method for disassembling a permanent magnet synchronous motor in another embodiment of the present application. Figure 4 As shown, when the projection position of the mounting hole of the motor housing exceeds the edge range of the upper ring 1, the permanent magnet synchronous motor disassembly auxiliary tooling further includes a fixing ring 4, the fixing ring 4 is provided with a plurality of third through holes 411 corresponding to the first through holes 11, and is also provided with a plurality of fourth through holes 421, and the steps of fixing the housing on the workbench using the auxiliary tooling include:

[0057] Step S301, first install the lower ring 2 of the auxiliary tooling on the workbench through the fixing piece and the second through hole 12, then place the fixing ring 4 on the top of the upper ring 1, and connect the first through hole 11 and the third through hole 411 through the fixing piece.

[0058] Step S302 , placing the motor housing on the top of the fixing ring 4 , and connecting the mounting hole of the motor housing with the fourth through hole 421 through a fixing piece.

[0059] In this embodiment, when the projection position of the mounting hole of the motor housing exceeds the edge range of the upper circular ring 1, it means that the previous auxiliary tooling cannot fix the motor housing. In order to deal with this situation, the auxiliary tooling needs to be upgraded, that is, a fixed ring 4 is connected at the top of the upper circular ring 1. The fixed ring 4 is provided with a number of third through holes 411 corresponding to the first through holes 11. The first through holes 11 and the third through holes 411 are fixedly connected by a fixing member, so that the fixed ring 4 can be fixedly installed on the top of the upper circular ring 1. In addition, a number of fourth through holes 421 are also provided. The mounting holes of the motor housing and the third through holes 411 are fixedly connected by a fixing member, so that the motor housing can be fixedly installed on the top of the fixed ring 4.

[0060] In this embodiment, the lower ring 2 of the auxiliary tooling is first installed on the workbench through the fixing parts and the second through hole 12 to ensure the overall stability of the auxiliary tooling; then the fixing ring 4 is placed on the top of the upper ring 1, and the first through hole 11 and the third through hole 411 are connected through the fixing parts to form a new auxiliary tooling, which can cope with the fixing tasks of some special motor casings; by placing the motor casing on the top of the fixing ring 4, and connecting the mounting hole of the motor casing with the fourth through hole 421 through the fixing parts, the motor casing can be effectively fixed to ensure smooth disassembly.

[0061] Further, in one embodiment, the step of separating the housing, the end cover, the rotor and the stator respectively in a preset order comprises:

[0062] Separate the housing from the end cover and take out the rotor in the housing; separate the end cover from the rotor fixed inside the end cover; separate the housing from the stator fixed in the housing.

[0063] In this embodiment, after the housing is fixed by the auxiliary tooling, the lifting ring on the motor housing can be used to connect with the lifting arm of the workshop, and the housing and the end cover can be pulled apart by the lifting arm. If necessary, jacks can be used on both sides of the motor to assist, which can increase the pulling force while maintaining the force balance. After the housing is separated from the end cover, the rotor and stator inside the housing can be seen. Since the rotor is still fixed on the inside of the end cover, after the rotor is taken out of the housing, the end cover must be further separated from the rotor fixed on the inside of the end cover, and finally the housing must be separated from the stator fixed in the housing. Compared with the conventional violent disassembly of the motor, disassembly in the above order can ensure that the key components of the motor will not be damaged to the greatest extent, so that the key components can be recycled and resources can be reduced. Waste.

[0064] Further, in one embodiment, the step of separating the end cover from the rotor fixed inside the end cover comprises:

[0065] If the rotor shaft cannot be separated from the bearing fixed in the bearing chamber inside the end cover, and the bearing chamber pressure plate cannot be disassembled before the rotor is separated, knock the rotor shaft inward from the outside of the end cover until the rotor is separated from the end cover.

[0066] In this embodiment, after the housing is separated from the end cover, the rotor can be separated. If the rotor shaft cannot be separated from the bearing in the bearing chamber fixed on the inner side of the end cover, and the bearing chamber pressure plate cannot be disassembled before the rotor is separated, use a copper hammer to knock the rotor shaft from the outside of the end cover to the inside until the entire rotor is knocked out. Then the bearing pressure plate can be disassembled and the bearing and end cover can be separated, which can protect the rotor from damage to the greatest extent. It should be noted that the bearing pressure plate is a concentric annular pressure plate, and screws are generally arranged on the outer circle. If the drive end bearing is replaced, the bearing pressure plate must be removed to take out the original bearing.

[0067] Further, in one embodiment, the step of separating the housing from the stator fixed in the housing includes:

[0068] The shell and the stator fixed in the shell are placed in a high-temperature oven and heated at a preset temperature for a preset time, then taken out, and the stator is pushed out of the shell to complete the separation.

[0069] In this embodiment, the housing and the stator fixed in the housing are placed in a high-temperature oven and heated at 150°C for at least 3-5 hours. After being taken out, the stator can be ejected with a cylindrical tool to complete the disassembly. (Note: The thermal expansion coefficients of the aluminum alloy housing and the silicon steel stator core are inconsistent. The aluminum alloy housing has a larger thermal expansion size after heating, which makes it easier to take out the stator.)

[0070] In addition, in some other embodiments, if the rotor punching assembly needs to be removed to inspect the internal structure of the rotor core, the rotor pressure plate and its fixing structure need to be removed, and a rotor press can be used to push out the rotor shaft to complete the disassembly.

[0071] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0072] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0073] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0074] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0075] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0076] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A permanent magnet synchronous motor disassembly auxiliary tooling, characterized in that: include: An upper circular ring (1) and a lower circular ring (2) are coaxially arranged, and the upper circular ring (1) and the lower circular ring (2) are fixedly connected via at least two supporting columns (3); the upper circular ring (1) is provided with a plurality of first through holes (11), and the lower circular ring (2) is provided with a plurality of second through holes (12) for fixing itself, and the first through holes (11) and the second through holes (12) contain fixing parts; When the mounting hole of the motor housing is projected onto the upper circular ring (1), the motor housing is mounted on the top of the upper circular ring (1) via a fixing member and a first through hole (11).

2. The permanent magnet synchronous motor disassembly auxiliary tooling according to claim 1, characterized in that: It also comprises a fixing ring (4), wherein the fixing ring (4) is provided with a plurality of third through holes (411) corresponding to the first through holes (11), and is also provided with a plurality of fourth through holes (421); When the projection position of the mounting hole of the motor housing exceeds the edge range of the upper circular ring (1), the fixing ring (4) is installed on the top of the upper circular ring (1), and the first through hole (11) and the third through hole (411) are connected via a fixing member; the motor housing is installed on the top of the fixing ring (4), and the mounting hole of the motor housing is connected to the fourth through hole (421) via a fixing member.

3. The permanent magnet synchronous motor disassembly auxiliary tooling as claimed in claim 2, characterized in that: The fixing ring (4) is divided into an inner ring area (41) and an outer ring area (42) which are coaxially arranged, the third through hole (411) is located in the inner ring area (41), and the fourth through hole (421) is located in the outer ring area (42).

4. A permanent magnet synchronous motor disassembly method based on the permanent magnet synchronous motor disassembly auxiliary tooling according to claim 1, characterized in that: include: Remove the junction box cover, rotary transformer cover and surface parts; First remove the wiring harness, then remove the junction box and the rotary transformer, and the wiring harness is arranged in the junction box cover; Use auxiliary tooling to fix the shell on the workbench, and separate the shell, end cover, rotor and stator in a preset order; Remove the auxiliary tooling.

5. The permanent magnet synchronous motor disassembly method according to claim 4, characterized in that: Before the step of removing the junction box cover, the rotary transformer cover and the surface parts, the method further includes: Determine the motor type; If the motor is a water-cooled motor, the surface parts of the motor are the water inlets and outlets; If the motor is an oil-cooled motor, the surface parts of the motor are the oil pump and the heat exchanger.

6. The method for disassembling a permanent magnet synchronous motor according to claim 4, characterized in that: The steps to remove the wiring harness first, then the junction box and resolver include: When the junction box includes a high-voltage junction box and a low-voltage junction box, the high-voltage junction box is provided with a high-voltage wiring harness, and the low-voltage junction box is provided with a low-voltage wiring harness, the wiring harness in each junction box is first removed, and then each junction box and the rotary transformer are removed; When the junction box is only a high-voltage junction box, and both a high-voltage wire harness and a low-voltage wire harness are arranged in the high-voltage junction box, the wire harness in the high-voltage junction box is first removed, and then the high-voltage junction box and the rotary transformer are removed.

7. The permanent magnet synchronous motor disassembly method according to claim 4, characterized in that: When the projection position of the mounting hole of the motor housing exceeds the edge range of the upper ring (1), the permanent magnet synchronous motor disassembly auxiliary tooling further comprises a fixing ring (4), the fixing ring (4) is provided with a plurality of third through holes (411) corresponding to the first through holes (11), and is further provided with a plurality of fourth through holes (421), and the steps of fixing the housing on the workbench using the auxiliary tooling include: First, the lower ring (2) of the auxiliary tooling is mounted on the workbench through the fixing piece and the second through hole (12), and then the fixing ring (4) is placed on the top of the upper ring (1), and the first through hole (11) and the third through hole (411) are connected through the fixing piece; The motor housing is placed on the top of the fixing ring (4), and the mounting hole of the motor housing is connected to the fourth through hole (421) via a fixing piece.

8. The method for disassembling a permanent magnet synchronous motor according to claim 4, characterized in that: The steps of separating the casing, the end cover, the rotor and the stator respectively in a preset order include: Separating the housing from the end cover and removing the rotor in the housing; Separating the end cover from the rotor fixed inside the end cover; The housing is separated from the stator fixed in the housing.

9. The method for disassembling a permanent magnet synchronous motor according to claim 8, characterized in that: The step of separating the end cover from the rotor fixed inside the end cover comprises: If the rotor shaft cannot be separated from the bearing fixed in the bearing chamber inside the end cover, and the bearing chamber pressure plate cannot be disassembled before the rotor is separated, knock the rotor shaft inward on the outside of the end cover until the rotor is separated from the end cover.

10. The permanent magnet synchronous motor disassembly method according to claim 8, characterized in that: The step of separating the housing from the stator fixed in the housing comprises: The shell and the stator fixed in the shell are placed in a high-temperature oven and heated at a preset temperature for a preset time, then taken out, and the stator is ejected from the shell to complete the separation.

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