Assembly system and assembly method

Abstract

This invention relates to an assembly system and method for press-fitting a rotor and end cover assembly into a stator and housing assembly. The assembly system includes a housing pressing structure, a rotor pressing structure, and an end cover pressing structure. The housing pressing structure internally defines an installation space, and its end has an annular positioning plate defining an opening communicating with the installation space. At least a portion of the rotor pressing structure is disposed within the installation space and is axially movable relative to the housing pressing structure. A fixing hole is provided at the center of the rotor pressing structure for fixing the rotor. The end cover pressing structure is connected to the end of the rotor pressing structure for fixing the end cover and is axially movable relative to the rotor pressing structure. The end cover fixing structure has a through hole communicating with the fixing hole. This configuration facilitates subsequent assembly with the stator and housing assembly, simplifies the assembly system, and improves assembly efficiency and yield.

Description

Technical Field

[0001] This invention belongs to the field of motor assembly technology, and more specifically, relates to an assembly system and assembly method. Background Technology

[0002] In traditional technology, the assembly process for motors typically involves pressing the rotor to the front bearing while simultaneously fixing the end cover to the housing for double support and fixation of the rotor. The end cover and housing can be fixed using methods such as gluing, bolting, interference fit, or heat fitting. Heat fitting, in particular, saves on component material costs and offers advantages such as reducing foreign matter buildup during pressing, providing strong holding force after installation, and ensuring good coaxiality. However, existing assembly systems for heat fitting are relatively complex, resulting in low assembly efficiency and low yield rates. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an assembly system with a simple structure that can improve assembly efficiency and yield.

[0004] In addition, the present invention also proposes an assembly method.

[0005] According to an embodiment of the first aspect of the present invention, an assembly system is used to press-fit a rotor and an end cover assembly into a stator and a housing assembly. The assembly system includes a housing pressing structure, a rotor pressing structure, and an end cover pressing structure. The housing pressing structure defines an installation space internally and has an annular positioning plate at its end, the positioning plate defining an opening communicating with the installation space. At least a portion of the rotor pressing structure is disposed within the installation space and is axially movable relative to the housing pressing structure. A fixing hole is provided at the center of the rotor pressing structure for fixing the rotor. The end cover pressing structure is connected to the end of the rotor pressing structure for fixing the end cover and is axially movable relative to the rotor pressing structure. The end cover pressing structure is provided with a through hole communicating with the fixing hole.

[0006] The assembly system according to embodiments of the present invention has at least the following beneficial effects: by integrating the housing pressing structure, the rotor pressing structure and the end cover pressing structure together, it is possible to conveniently fix and position the rotor and end cover of the rotor and end cover assembly at the same time, so as to facilitate the subsequent assembly process with the stator and housing assembly, simplifying the assembly system and improving assembly efficiency and yield.

[0007] According to some embodiments of the present invention, the positioning plate is provided with annular protrusions or multiple arc-shaped protrusions around the opening for positioning the housing.

[0008] According to some embodiments of the present invention, the housing pressing structure is configured as a cylinder, the end of which has a flange extending radially along the cylinder to form the positioning plate.

[0009] According to some embodiments of the present invention, the housing pressing structure includes a plurality of first cylinders disposed on the rotor pressing structure, wherein the first piston rods of the plurality of first cylinders are connected to the positioning plate and disposed around the mounting space.

[0010] According to some embodiments of the present invention, a second cylinder is further provided on the end face of the rotor press-fit structure facing the end cover press-fit structure, and the second piston rod of the second cylinder is connected to the end cover press-fit structure.

[0011] According to some embodiments of the present invention, a guide post is provided on the end face of the end cap pressing structure facing the rotor pressing structure, and the rotor pressing structure is provided with a clearance hole for the guide post to pass through.

[0012] According to some embodiments of the present invention, the rotor press-fit structure is provided with a plurality of first protrusions spaced apart from the end cover press-fit structure, and a first groove is formed between adjacent first protrusions. The end cover press-fit structure is provided with a plurality of second protrusions from the rotor press-fit structure, and the plurality of second protrusions match the plurality of first grooves.

[0013] According to some embodiments of the present invention, the end face of the end cap press-fit structure is provided with a plurality of suction cups, and the plurality of suction cups are evenly arranged around the through hole.

[0014] According to some embodiments of the present invention, the end of the end cap press-fit structure is provided with a plurality of mounting grooves, the plurality of mounting grooves are evenly arranged around the through hole, a push rod is provided in the mounting groove, a spring is provided at the bottom of the push rod, and a limiting structure is connected to the push rod to prevent the push rod from falling out.

[0015] According to some embodiments of the present invention, the suction cup and the push rod are sequentially arranged along the radial direction away from the through hole of the housing pressing structure.

[0016] According to some embodiments of the present invention, the assembly system further includes a housing positioning fixture, which includes a positioning plate, a bearing support platform, and a guide rod. A boss is formed on the periphery of the positioning plate, and a central hole is formed at the center of the positioning plate. The bearing support platform is annular and is disposed on the positioning plate around the central hole. The guide rod is installed in the central hole and can move axially relative to the housing positioning fixture to support the rotor shaft.

[0017] According to some embodiments of the present invention, the top end of the guide rod is provided with a positioning protrusion that cooperates with the rotating shaft.

[0018] According to some embodiments of the present invention, the assembly system further includes a heating device for heating the housing.

[0019] According to a second aspect embodiment of the present invention, an assembly method using the assembly system of the first aspect embodiment of the present invention, wherein the assembly assembly of the stator and housing has a rotor mounting position and an end cover mounting position, the assembly method includes the following steps:

[0020] The rotor shaft is installed into the fixing hole and fixed, and the end cover is fixed by the end cover press-fitting structure to obtain the combination of the rotor and the end cover;

[0021] The stator and the housing are combined to form the stator and housing assembly;

[0022] The assembly of the rotor and end cover is moved to a first predetermined position to abut and position the positioning plate against the end edge of the housing;

[0023] The casing is heated;

[0024] The rotor pressing structure is used to push the assembly of the rotor and the end cover to a second predetermined position, so that the rotor is installed in the rotor mounting position and the end cover is installed at the entrance of the end cover mounting position.

[0025] The end cap is press-fitted into the end cap mounting position using the end cap press-fit structure.

[0026] According to the assembly method of the second aspect of the present invention, by adopting the assembly system of the first aspect embodiment, the assembly assembly of the rotor and end cover can be conveniently fixed and positioned, so as to facilitate the assembly with the stator and housing assembly during the assembly process, simplifying the assembly process and improving the assembly efficiency and yield.

[0027] An assembly system according to a third aspect of the present invention is used for press-fitting an assembly of a rotor and an end cover into an assembly of a stator and a housing, the assembly system comprising:

[0028] The housing has a top-pressing structure, which internally defines an installation space. The end has an annular positioning plate, which defines an opening that communicates with the installation space. The positioning plate has annular protrusions or multiple arc-shaped protrusions around the opening.

[0029] The rotor press-fit structure is at least partially disposed within the mounting space and can be driven to move axially relative to the housing pressing structure. The rotor press-fit structure is provided with fixing holes for fixing the rotor.

[0030] An end cap press-fit structure is connected to the end of the rotor press-fit structure to fix the end cap and can be driven to move axially relative to the rotor press-fit structure. The end cap press-fit structure is provided with a through hole communicating with the fixing hole.

[0031] A housing positioning fixture is used to fix the assembly of the stator and the housing.

[0032] A heating device for heating the casing;

[0033] The rotor pressing structure is further provided with a second cylinder on the end face facing the end cover pressing structure, and the second piston rod of the second cylinder is connected to the end cover pressing structure.

[0034] The assembly system according to embodiments of the present invention has at least the following beneficial effects: by integrating the housing pressing structure, the rotor pressing structure, and the end cover pressing structure together, the rotor and end cover of the rotor and end cover assembly can be conveniently fixed and positioned simultaneously, facilitating subsequent assembly with the stator and housing assembly, simplifying the assembly system, and improving assembly efficiency and yield; at the same time, the circular protrusions or multi-segment arc protrusions around the opening on the positioning plate can improve the positioning accuracy of the rotor and end cover assembly and the stator and housing assembly, and also improve the yield.

[0035] According to a fourth aspect of the present invention, an assembly method using the assembly system of a third aspect of the present invention, wherein the assembly assembly of the stator and housing has a rotor mounting position and an end cover mounting position, the assembly method includes the following steps:

[0036] The rotor shaft is installed into the fixing hole and fixed, and the end cover is fixed by the end cover press-fitting structure to obtain the combination of the rotor and the end cover;

[0037] The stator and the housing are combined to form the stator and housing assembly, and the housing positioning fixture is used to fix the stator and housing assembly.

[0038] The assembly of the rotor and end cover is moved to a first predetermined position, such that the positioning plate abuts against the end edge of the housing, and the annular protrusion or the arc-shaped protrusion is positioned and engaged with the end edge of the housing.

[0039] The casing is heated using a heating device;

[0040] The rotor pressing structure is used to push the assembly of the rotor and the end cover to a second predetermined position, so that the rotor is installed in the rotor mounting position and the end cover is installed at the entrance of the end cover mounting position.

[0041] The end cap is pressed into the end cap mounting position using the second cylinder.

[0042] The assembly method according to the embodiments of the present invention has at least the following beneficial effects: by adopting the assembly system of the third aspect embodiment, the combination of rotor and end cover can be conveniently fixed and positioned, so as to facilitate assembly with the combination of stator and housing during the assembly process, simplifying the assembly process and improving assembly efficiency and yield.

[0043] According to some embodiments of the present invention, the housing positioning fixture includes a positioning disk and a guide rod. A central hole is provided at the center of the positioning disk, and the guide rod is installed in the central hole and can move axially relative to the housing positioning fixture. After moving the assembly of the rotor and the end cover to the first predetermined position, the following steps are further included:

[0044] The guide rod extends upward to support the rotating shaft.

[0045] According to some embodiments of the present invention, the housing pressing structure includes a plurality of first cylinders disposed on the rotor pressing structure, the first piston rods of the plurality of first cylinders being connected to the positioning plate and disposed around the mounting space, and the step of moving the assembly of the rotor and the end cover to the first predetermined position further includes the following steps:

[0046] The positioning plate is extended along the top pressing structure of the housing by the first cylinder, so as to hold and position the positioning plate against the end edge of the housing.

[0047] An assembly method according to a fifth aspect of the present invention, for pressing an assembly of a rotor and an end cover into an assembly of a stator and a housing, the assembly of the stator and the housing having a rotor mounting position and an end cover mounting position, includes the following steps:

[0048] The rotor and the end cover are combined to form the rotor and end cover assembly;

[0049] The stator and the housing are combined to form the stator and housing assembly;

[0050] The rotor and end cover assembly is moved to a first predetermined position to align with the stator and housing assembly;

[0051] The casing is heated;

[0052] The assembly of the rotor and the end cap is press-fitted to a second predetermined position, such that the rotor is inserted into the rotor mounting position and the end cap is installed at the entrance of the end cap mounting position.

[0053] The end cap is pressed into the end cap mounting position.

[0054] The assembly method according to the embodiments of the present invention has at least the following beneficial effects: by adopting the above assembly method, it is convenient to assemble the assembly with the stator and the housing during the assembly process, simplifying the assembly process and improving the assembly efficiency and yield.

[0055] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0056] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0057] Figure 1 This is a three-dimensional structural diagram of the rotor and end cap assembly according to some embodiments of the present invention;

[0058] Figure 2 This is a top-view perspective structural diagram of the stator and housing assembly according to some embodiments of the present invention;

[0059] Figure 3 This is a bottom-view perspective structural diagram of the stator and housing assembly according to some embodiments of the present invention;

[0060] Figure 4 This is a three-dimensional structural diagram of the press-fit assembly in the first state according to some embodiments of the present invention;

[0061] Figure 5 This is a front view of the press-fit assembly in a first state according to some embodiments of the present invention;

[0062] Figure 6 for Figure 5 A cross-sectional view of AA;

[0063] Figure 7 This is a three-dimensional structural diagram of the press-fit assembly in the second state according to some embodiments of the present invention;

[0064] Figure 8 This is a front view of the press-fit assembly in a second state according to some embodiments of the present invention;

[0065] Figure 9 for Figure 4 A cross-sectional view of BB;

[0066] Figure 10 for Figure 9 A magnified view at point C;

[0067] Figure 11 This is a three-dimensional structural diagram of a press-fit assembly (omitting part of the rotor press-fit structure) according to some embodiments of the present invention;

[0068] Figure 12 for Figure 11 A schematic diagram of the exploded structure;

[0069] Figure 13 A three-dimensional structural schematic diagram of a press-fit assembly of a rotor and an end cap according to some embodiments of the present invention;

[0070] Figure 14 This is a three-dimensional structural schematic diagram of the housing positioning fixture according to some embodiments of the present invention;

[0071] Figure 15 This is a cross-sectional view of the assembly of the stator and the housing using a housing positioning tooling according to some embodiments of the present invention;

[0072] Figure 16 A cross-sectional view of the assembly of the rotor and end cap of the press-fit assembly according to some embodiments of the present invention.

[0073] Figure 17 This is a schematic diagram of the assembly structure of the rotor and end cover assembly and the stator and housing assembly in the first state according to some embodiments of the present invention.

[0074] Figure 18 for Figure 17 A sectional view;

[0075] Figure 19 This is a schematic diagram of the assembly structure of the rotor and end cover assembly and the stator and housing assembly in the second state according to some embodiments of the present invention.

[0076] Figure 20 for Figure 19 A sectional view;

[0077] Figure 21 This is a cross-sectional view of the structure of the rotor and end cover assembly and the stator and housing assembly after assembly according to some embodiments of the present invention;

[0078] Figure 22 This is a flowchart of an assembly method according to some embodiments of the present invention;

[0079] Figure 23 This is a flowchart of an assembly method according to some embodiments of the present invention;

[0080] Figure 24 This is a flowchart of an assembly method according to some embodiments of the present invention;

[0081] Figure 25 This is a flowchart of an assembly method according to some embodiments of the present invention;

[0082] Figure 26 This is a flowchart of an assembly method according to some embodiments of the present invention.

[0083] Figure label:

[0084] The rotor and end cover assembly 100, rotor 101, end cover 102, upper shaft head 103, lower shaft head 104, first positioning hole 105, first positioning groove 106, and second positioning groove 107;

[0085] Stator and housing assembly 200, housing 201, power connection terminal 202, rotor mounting position 203;

[0086] Tooling surface 301, second positioning hole 302, bearing inner ring 303, assembly ring 304, shaft hole 305, mounting boss 306;

[0087] Opening 401, rotor press-fit structure 402, end cover press-fit structure 403, positioning plate 404, fixing hole 405, vacuum suction cup 406, push rod 407, limiting post 408, limiting groove 409, through hole 410, through hole 411, first cylinder 412, first piston rod 413;

[0088] Circular protrusion 501, second cylinder 502, second piston rod 503;

[0089] Guide post 601, clearance hole 602

[0090] Third positioning hole 901;

[0091] 1000 housing positioning fixture, 1001 positioning plate, 1002 bearing support platform, 1003 boss, 1004 guide rod, 1005 positioning post, 1006 center hole;

[0092] First protrusion 1201, first groove 1202, second protrusion 1203;

[0093] Induction heating coil 1501, end cover mounting position 1502, positioning protrusion 1503.

[0094] Positioning core 1601. Detailed Implementation

[0095] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0096] In the description of this invention, it should be understood that the orientation descriptions, such as top, bottom, inside, outside, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0097] In the description of this invention, the use of terms such as first, second, and third is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0098] In the description of this invention, unless otherwise explicitly defined, terms such as setting, installing, connecting, assembling, and being located should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0099] An electric motor (English: Electric machinery, commonly known as a "motor") is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction.

[0100] The motor is mainly composed of a rotor, stator, housing, and end cover. In traditional technology, the assembly process of the motor is usually as follows: press the rotor to the front bearing and fix the end cover to the housing to provide double support for the rotor. The end cover and housing can be fixed by applying glue, tightening bolts, interference fit, heat fitting, etc. Among them, heat fitting saves the cost of parts and materials, reduces the generation of foreign objects during the press-fitting process, and has the advantages of strong holding force and good coaxiality after installation.

[0101] However, existing assembly systems for heat fitting processes are relatively complex, resulting in low assembly efficiency and yield.

[0102] Therefore, the present invention proposes an assembly system for the assembly process of motors, and the inventive concept of the present invention will be described below with reference to the accompanying drawings.

[0103] Reference Figure 1 As shown, a rotor and end cap assembly 100 is illustrated. The assembly includes a rotor 101 and an end cap 102. The end cap 102 has a first positioning groove 106 and a second positioning groove 107. The first positioning groove 106 has a different structural size or shape than the second positioning groove 107. This allows a robot or transfer mechanism to identify and adjust the circumferential position of the rotor and end cap assembly 100 based on the first positioning groove 106, thereby mounting the rotor and end cap assembly 100 onto a press-fitting assembly (see reference). Figures 3-4 (as shown) inside.

[0104] It should be noted that the rotor 101 has an upper shaft head 103 and a lower shaft head 104, wherein the upper shaft head 103 passes through the mounting hole on the end cover 102 for assembly, thereby forming a combination 100 of the rotor and the end cover.

[0105] It should also be noted that the upper shaft head 103 has a first positioning hole 105 for positioning, and the lower shaft head 104 has a third positioning hole 901 for positioning (see reference). Figure 15 , Figure 16 (As shown).

[0106] In addition, in order to reduce vibration and noise, the rotor and end cover assembly 100 typically includes a wave-shaped gasket disposed between the rotor 101 and the end cover 102, which is not shown in the figure.

[0107] Reference Figure 2 , Figure 3 As shown, a stator and housing assembly 200 is illustrated, which is formed by assembling a stator (not fully shown in the figure, but the figure shows the electrical terminals 202 on the stator busbar) and a housing 201.

[0108] Reference Figure 3 As shown, the lower side of the housing 201 has an assembly ring 304, which protrudes from the bottom surface of the housing 201. A tooling surface 301 is formed on the outer side of the assembly ring 304. The bottom surface of the housing 201 also has a shaft hole 305, which is located inside the bearing inner ring 303. In addition, a mounting boss 306 is connected to the assembly ring 304, and a second positioning hole 302 for positioning is provided on the mounting boss 306.

[0109] It should be noted that the mounting boss 306 can be spaced apart from the bottom surface of the housing 201.

[0110] Reference Figure 4 , Figure 5 As shown, it illustrates a portion of the assembly system's structure, namely the press-fit assembly for fixing and press-fitting the rotor and end cap assembly 100.

[0111] Specifically, refer to Figure 4 , Figure 5 , Figure 6As shown, the press-fit assembly includes a housing pressing structure, a rotor pressing structure 402, and an end cap pressing structure 403. The housing pressing structure defines an installation space, and its end has an annular positioning plate 404. The positioning plate 404 defines an opening 401 that communicates with the installation space. At least a portion of the rotor pressing structure 402 is located within the installation space and can be driven to move axially relative to the housing pressing structure. The rotor pressing structure 402 has a fixing hole 405 at its center for fixing the upper shaft head 103 of the rotor 101. The end cap pressing structure 403 is connected to the end of the rotor pressing structure 402 for fixing the end cap 102 and can be driven to move axially relative to the rotor pressing structure 402. The end cap 102 fixing structure has a through hole 410 communicating with the fixing hole 405 to expose the fixing hole 405, so that the upper shaft head 103 of the rotor 101 can be inserted and fixed in the fixing hole 405 through the through hole 410.

[0112] It should be noted that the attached drawings only show part of the press-fit components of the assembly system, mainly the structures that directly interact or cooperate with the rotor and end cover assembly 100 and the stator and housing assembly 200. The related structures involving the inventive points, which are not shown in the attached drawings, will be further described in this article.

[0113] It should also be noted that, referring to Figure 12 , Figure 13 As shown, the housing pressing structure is mainly used to abut against the housing 201 when the rotor and end cover assembly 100 is pressed into the stator and housing assembly 200. In actual operation, the annular positioning plate 404 directly abuts against the housing 201.

[0114] Reference Figure 9 As shown, the rotor press-fit structure 402 is mainly used to fix the rotor 101. Specifically, the upper shaft head 103 of the rotor 101 is inserted into the fixing hole 405 and fixed. The end cover press-fit structure 403 is mainly used to fix the end cover 102. The end cover 102 is fixed on the end face of the end cover press-fit structure 403, thereby realizing the positioning and fixing of the rotor and end cover assembly 100.

[0115] According to the first aspect of the present invention, the assembly system integrates the housing pressing structure, the rotor pressing structure 402 and the end cover pressing structure 403 together, which can conveniently fix and position the rotor 101 and the end cover 102 of the rotor and end cover assembly 100 at the same time, so as to facilitate the subsequent assembly process with the stator and housing assembly 200, simplifying the assembly system and improving assembly efficiency and yield.

[0116] When the rotor and end cover assembly 100 is thermally fitted with the stator and housing assembly 200, the end cover 102 and housing 201 have a small clearance fit. Therefore, the positioning accuracy requirements for the rotor and end cover assembly 100 and the stator and housing assembly 200 are extremely high. In particular, the fit between the end cover 102 and housing 201 with a large interference fit (interference greater than 0.12mm) is often less than 50% due to inaccurate positioning.

[0117] To achieve the positioning of the end cover 102 and the housing 201, a bottom positioning method is usually adopted, that is, using the housing positioning fixture 1000 (see reference). Figure 14 , 15 As shown in the figure, the end cover 102 is directly fastened to the end cover mounting position 1502 inside the housing 201 according to the reference coordinates (see figure). Figure 12 (As shown), however, during the process of pressing the rotor and end cover assembly 100 into the stator and housing assembly 200, the magnetic attraction of the rotor 101 will have a significant impact on the rotor and end cover assembly 100, causing the rotor and end cover assembly 100 to shift during the pressing process, thereby reducing the yield.

[0118] Therefore, in some embodiments, reference is made to Figures 7-10 As shown, the positioning plate 404 has an annular protrusion 501 around the opening 401 for positioning the housing 201.

[0119] It should be noted that the annular protrusion 501 can also be replaced by a multi-segment arc-shaped protrusion.

[0120] Understandably, when the press-fit assembly presses the rotor and end cover assembly 100 against the stator housing 201 assembly, the annular protrusion 501 on the positioning plate 404 can be positioned against the end edge of the housing 201, referring to... Figure 12 As shown, the annular protrusion 501 is snapped onto the inner side of the end edge of the housing 201 to position the housing 201 at the center. In this way, when the rotor pressing structure 402 and the end cover pressing structure 403 press down the rotor and end cover assembly 100, the rotor and end cover assembly 100 will not shift due to the magnetic attraction of the rotor 101.

[0121] It should be noted that the annular protrusion 501 can also be snapped onto the outer side of the end edge of the housing 201 to locate the center of the housing 201.

[0122] In some embodiments, not shown in the figures, the housing top pressing structure is configured as a cylindrical structure, the end of the cylindrical structure having a flange extending radially along the cylinder to form a positioning plate 404, and an installation space is formed inside the cylinder.

[0123] It should be noted that the inner wall of the cylinder can play a good guiding role in the movement of the rotor press-fit structure 402.

[0124] It should also be noted that, in order to facilitate the mounting of the annular protrusion 501 or the arc-shaped protrusion onto the end edge of the housing 201, a guide surface is provided on the side of the annular protrusion 501 or the arc-shaped protrusion that is fitted onto the end edge of the housing 201. (Refer to...) Figure 9 , Figure 10 As shown, the guide surface is set on the outer surface of the annular protrusion 501, specifically the guide surface is set as an inclined surface.

[0125] In some embodiments, such as Figure 4-Figure 6 As shown, the housing pressing structure includes a plurality of first cylinders 412 disposed on the rotor pressing structure 402, and the first piston rods 413 of the plurality of first cylinders 412 are connected to the positioning plate 404 and are arranged around the installation space.

[0126] It should be noted that the first cylinder 412, including the first piston rod 413, can be provided in two, three, four or more forms to improve the smoothness of the movement of the positioning plate 404.

[0127] It should also be noted that the multiple first cylinders 412 are supplied with air from the same air source (not shown in the figure). The air source inputs high-pressure gas into the multiple first cylinders 412 through an air pipe (not shown in the figure). The air pipe is equipped with a control valve (not shown in the figure) to control the gas on / off and / or flow rate.

[0128] Understandably, in order to move the rotor pressing structure 402, the rotor pressing structure 402 is driven by a power mechanism, such as a robotic arm, servo motor, hydraulic system or cylinder. Of course, using a hydraulic system or cylinder can save manufacturing costs and reduce the size of the power mechanism.

[0129] In some embodiments, refer to Figure 6 , Figure 7 , Figure 9 As shown, a second cylinder 502 is also provided on the end face of the rotor pressing structure 402 facing the end cover pressing structure 403, and the second piston rod 503 of the second cylinder 502 is connected to the end cover pressing structure. This allows for control of the movement of the end cover pressing structure 403 relative to the rotor pressing structure 402.

[0130] It should be noted that multiple second cylinders 502 are supplied with air from the same air source (not shown in the figure). The air source inputs high-pressure gas into multiple second cylinders 502 through an air pipe (not shown in the figure). The air pipe is equipped with a control valve (not shown in the figure) to control the gas on / off and / or flow rate.

[0131] In some embodiments, refer to Figure 6 , Figure 7 , Figure 9 As shown, in order to make the movement of the end cap pressing structure 403 more stable, the end cap pressing structure 403 is provided with a guide post 601, and the rotor pressing structure 402 is provided with a clearance hole 602 for the guide post 601 to pass through.

[0132] In some embodiments, refer to Figure 11 , Figure 12 As shown, part of the rotor press-fit structure 402 is omitted to allow for a clearer view of the internal structure. The rotor press-fit structure 402 has a plurality of first protrusions 1201 spaced apart from the end cover press-fit structure 403, and a first groove 1202 is formed between adjacent first protrusions 1201. The end cover press-fit structure has a plurality of second protrusions 1203 facing the rotor press-fit structure, and the plurality of second protrusions 1203 match the plurality of first grooves 1202.

[0133] This improves the structural strength of the assembly system.

[0134] Reference Figure 4 , Figures 7-9 As shown, in some embodiments, the end face of the end cap pressing structure 403 away from the rotor pressing structure 402 is provided with a plurality of vacuum suction cups 406, and the plurality of vacuum suction cups 406 are evenly arranged around the through hole 410.

[0135] Understandably, the suction cup can be a vacuum suction cup 406.

[0136] The vacuum suction cup 406 can be supplied with air by a cylinder mounted on the press assembly, or it can use other air sources.

[0137] In order to stably and flatly attach the end cap 102 to the end face of the end cap press-fit structure 403, multiple vacuum suction cups 406 need to be evenly arranged around the through hole 410. The specific number of vacuum suction cups 406 is not limited.

[0138] When the end cover 102 is pushed and installed onto the end cover mounting position 1502 of the housing 201, in order to ensure assembly accuracy and improve yield, it is necessary to ensure the flatness of the end cover 102 and the end cover mounting position 1502. Since the surface of the end cover 102 is an unprocessed surface with poor flatness, a corresponding adjustment mechanism is required.

[0139] Reference Figure 7-Figure 8 As shown, the end cap press-fit structure 403 has multiple mounting grooves (not marked in the figure) at its end. The multiple mounting grooves are evenly arranged around the through hole 410. A push rod 407 is provided in the mounting groove. A spring is provided at the bottom of the push rod 407. The push rod 407 is connected to a limiting structure to prevent the push rod 407 from falling out.

[0140] This design can absorb the problem of uneven installation of end cap 102 caused by poor flatness.

[0141] It should be noted that there is no limit to the number of mounting slots.

[0142] Understandably, the limiting structure can be set as a limiting post 408 connected to the push rod 407. The limiting post 408 is set in the limiting groove 409 on the outer peripheral surface of the end cap press-fit structure 403. The gap between the limiting groove 409 and the push rod 407 determines the space in which the push rod 407 can move. The gap can generally be set between 0.1mm and 3mm.

[0143] It is also understandable that, in order to ensure that the push rod 407 can function effectively, a spring with appropriate elasticity should be selected according to the actual situation to match the thrust received by the end cap 102, so that the push rod 407 can perform its best function.

[0144] In some embodiments, refer to Figure 7-Figure 8 As shown, along the radial direction away from the through hole 410 of the constant pressure mechanism, a vacuum chuck 406 and a push rod 407 are sequentially arranged.

[0145] Understandably, the above settings can reduce the impact of the movement of the push rod 407 on the suction force of the vacuum chuck 406, and prevent the movement of the push rod 407 from causing the vacuum chuck 406 to loosen, thereby improving the assembly accuracy to a certain extent.

[0146] It is also understandable that, referring to Figure 4 As shown, the end of the end cap press-fit structure 403 is provided with a plurality of through holes 411, which are used to avoid the conductive terminals 202 of the stator (see reference). Figure 2 (As shown).

[0147] Reference Figure 1 , Figure 7 , Figure 16 , Figure 18 , Figure 20 As shown, a first positioning hole 105 for positioning is formed on the upper shaft head 103 of the rotor 101. Correspondingly, a positioning core 1601 that cooperates with the first positioning hole 105 is provided inside the fixing hole 405 of the rotor press-fitting structure 402. This arrangement can improve the assembly accuracy of the rotor press-fitting structure 402 and the rotor 101.

[0148] In some embodiments, refer to Figures 14-15As shown, the assembly system also includes a housing positioning fixture 1000, which includes a positioning plate 1001, a bearing support platform 1002, and a guide rod 1004. A boss 1003 is formed on the periphery of the positioning plate 1001. The bearing support platform 1002 is located at the center of the positioning plate 1001, and a center hole 1006 is opened at the center of the bearing support platform 1002. The guide rod 1004 is installed in the center hole 1006 and can move axially relative to the housing positioning fixture 1000.

[0149] It should be noted that, referring to Figure 15 As shown, the stator assembly of housing 201 is installed in the housing positioning fixture 1000. The boss 1003 on the periphery of the positioning plate 1001 abuts against the annular fixture surface 301 on the outer side of the assembly ring 304 of housing 201. Due to the cooperation between the boss 1003 and the assembly ring 304, the stability of the housing positioning fixture 1000 in supporting the stator assembly of housing 201 can be improved.

[0150] At the same time, the bearing support platform 1002 can cooperate with the bearing inner ring 303 of the housing 201. Specifically, the bearing support platform 1002 is inserted into the interior of the bearing inner ring 303, thereby further improving the stability of the housing positioning fixture 1000.

[0151] Reference Figure 17 , Figure 18 As shown, the guide rod 1004 is installed in the center hole 1006 and can move axially relative to the housing positioning fixture 1000. It can also enter the rotor mounting position 203 inside the housing 201 through the shaft hole 305 on the bottom surface of the housing 201.

[0152] Furthermore, when the rotor 101 enters the rotor mounting position 203, the guide rod 1004 can abut against the lower shaft head 104 of the rotor 101, providing a certain lifting force to the rotor 101, thereby controlling the downward pressure on the rotor and end cover assembly 100 to a predetermined value, improving the stability of installation, and increasing the yield.

[0153] It should be noted that, referring to Figure 15 , Figure 16 As shown, the top of the guide rod 1004 has a positioning protrusion 1503, which can cooperate with the third positioning hole 901 on the lower shaft head 104 of the rotor 101. During the pressing down of the rotor 101, unnecessary shaking of the rotor shaft of the rotor 101 can be avoided.

[0154] It should also be noted that the housing positioning fixture 1000 also includes a positioning post 1005, which cooperates with the second positioning hole 302 of the mounting boss 306 of the housing 201 to improve the positioning capability of the housing positioning fixture 1000 for the assembly 200 of the stator and the housing.

[0155] In some embodiments, not shown in the figures, the movement of the guide rod 1004 relative to the housing positioning fixture 1000 is powered by a third cylinder.

[0156] Understandably, in order to drive the movement of the guide rod 1004, the third cylinder can also be replaced by other power structures, such as a servo motor or a hydraulic system. Of course, using a cylinder can save manufacturing costs and reduce the size of the power mechanism.

[0157] It should be noted that, referring to Figure 13 As shown, the assembly system also includes a heating device for heating the housing 201.

[0158] Specifically, the heating device can be an induction heating coil 1501, which can be easily fitted onto the outside of the housing 201 and provides more uniform heating while reducing production costs.

[0159] It is understandable that the induction heating coil 1501 is located near the end cover mounting position 1502 of the housing 201 and arranged around the end cover mounting position 1502 so that the corresponding part can expand, which facilitates the installation of the end cover 102.

[0160] The assembly method according to a second aspect embodiment of the present invention, referring to Figure 22 As shown, it uses the assembly system of the first aspect embodiment of the present invention, referring to Figure 2 , Figure 15 As shown, the stator and housing assembly 200 has a rotor mounting position 203 and an end cover mounting position 1502, specifically including the following steps:

[0161] Step S2201: The rotor 101 shaft is installed into the fixing hole 405 and fixed, and the end cover 102 is fixed by the end cover press-fit structure 403 to obtain the rotor and end cover assembly 100.

[0162] Understandably, referring to Figure 1 As shown, the rotor and end cover assembly 100 is formed by combining a rotor 101, a wave-shaped gasket (not shown in the figure) and an end cover 102. The robot or transfer mechanism can identify and adjust the axial position of the rotor and end cover assembly 100 according to the first positioning hole 105, thereby installing the rotor and end cover assembly 100 into the press assembly.

[0163] Specifically, according to Figure 6, Figure 9 As shown, the robot or transfer mechanism inserts the upper shaft head 103 of the rotor 101 into the fixing hole 405, and the fixing hole 405 has a claw to fasten the upper shaft head 103; the end cover 102 is fixed by the suction cup on the end cover press-fit structure 403.

[0164] Step S2202, the stator (not fully shown in the figure) Figure 2 The diagram shows the combination of the stator busbar (electric terminals 202) and the housing 201 to form a stator and housing assembly 200;

[0165] It is understandable that the lower end face of the end cap press-fit structure 403 is provided with a through hole 411 that can avoid the electrical terminal 202.

[0166] Step S2203: Move the rotor and end cover assembly 100 to a first predetermined position to hold and position the positioning plate 404 against the end edge of the housing 201.

[0167] Step S2204: Heat the casing;

[0168] Understandably, the press-fit assembly, driven by the power system, moves the rotor and end cover assembly 100 above the stator and housing assembly 200, and mates the annular protrusion 501 of the positioning plate 404 of the housing top pressing structure with the housing 201, thus preparing for press-fitting.

[0169] It should be noted that the parameters for heating the casing 201 and the specific timing of the heating are well-known in the field and will not be elaborated here.

[0170] In step S2205, the rotor and end cover assembly 100 is pushed to the second predetermined position by the rotor pressing structure 402, so that the rotor 101 is installed in the rotor mounting position 203 and the end cover 102 is installed at the entrance of the end cover mounting position 1502.

[0171] It is understandable that the rotor pressing structure 402 is driven by the power system, which will drive the rotor and end cover assembly 100 to move, thereby pressing the rotor and end cover assembly 100 to the second predetermined position.

[0172] It should be noted that the guide rod 1004 of the housing positioning fixture 1000 abuts against the lower shaft head 104 of the rotor 101 under the drive of the third cylinder. The rotor pressing structure 402 and the end cover pressing structure 403 can push the rotor and end cover assembly 100 down. At the same time, the guide rod 1004 provides a lifting force to the rotor and end cover assembly 100.

[0173] It should also be noted that step S2204, which involves heating the housing, and step S2205, which involves using the rotor pressing structure 402 to push the rotor and end cover assembly 100 down, can be performed simultaneously. Alternatively, the housing can be heated for a period of time before pressing down the rotor and end cover assembly 100, or the rotor and end cover assembly 100 can be pressed down for a period of time before heating the housing 201 as needed. Any adjustment to the order of these steps is within the scope of protection of this invention.

[0174] Step S2206: Use the end cap pressing structure 403 to press the end cap 102 into the end cap mounting position 1502.

[0175] Understandably, after the rotor 101 is installed in place, the end cover pressing structure 403 pushes the end cover 102 down into the end cover 102 installation of the housing 201, completing the assembly of the rotor and end cover assembly 100 with the stator and housing assembly 200.

[0176] It should also be noted that after assembly, the guide rod 1004 of the housing positioning fixture 1000 and the bearing support platform 1002 retract, the grippers in the fixing hole 405 of the rotor pressing structure 402 loosen, the vacuum suction cup 406 of the end cover pressing structure 403 closes, and the pressing assembly moves back to its initial position.

[0177] The structure after the rotor and end cover assembly 100 and the stator and housing assembly 200 are assembled is as follows: Figure 21 As shown.

[0178] According to the assembly method of the second aspect of the present invention, by adopting the assembly system of the first aspect embodiment, the rotor and end cover assembly 100 can be conveniently fixed and positioned, so as to facilitate assembly with the stator and housing assembly 200 during the assembly process, simplifying the assembly process and improving assembly efficiency and yield.

[0179] According to the assembly system of the third aspect of the present invention, referring to the accompanying drawings, the assembly system for pressing the rotor and end cover assembly 100 into the stator and housing assembly 200 includes a housing pressing structure, a rotor pressing structure 402, an end cover pressing structure 403, a housing positioning fixture 1000, and a heating device 1501.

[0180] The internal space of the housing top pressure structure is defined to form an installation space. The end has an annular positioning plate 404. The positioning plate 404 defines an opening 401 that communicates with the installation space. The positioning plate 404 is provided with an annular protrusion 501 or multiple arc-shaped protrusions around the opening 401.

[0181] The rotor press-fit structure 402 is at least partially located within the installation space and can be driven to move axially relative to the housing top press structure. The rotor press-fit structure 402 is provided with fixing holes 305 for fixing the rotor 101.

[0182] The end cap press-fit structure 403 is connected to the end of the rotor press-fit structure 402 for fixing the end cap 102 and can be driven to move axially relative to the rotor press-fit structure 402. The end cap press-fit structure 403 is provided with a through hole communicating with the fixing hole 305.

[0183] The housing positioning fixture 1000 is used to fix the assembly 200 of the stator and the housing;

[0184] Heating device 1501 is used to heat the casing 201;

[0185] Among them, a second cylinder 502 is also provided on the end face of the rotor pressing structure 402 facing the end cover pressing structure 403, and the second piston rod 503 of the second cylinder 502 is connected to the end cover pressing structure 403.

[0186] The assembly system according to the third aspect of the present invention has at least the following beneficial effects: by integrating the housing pressing structure, the rotor pressing structure 402 and the end cover pressing structure 403 together, the rotor 101 and the end cover 102 of the rotor and end cover assembly 100 can be conveniently fixed and positioned simultaneously, so as to facilitate assembly with the stator and housing assembly 200 in the subsequent assembly process, simplifying the assembly system and improving assembly efficiency and yield; at the same time, the circular protrusion 501 or multiple arc protrusions provided on the positioning plate 404 around the opening 401 can improve the positioning accuracy of the rotor and end cover assembly 100 and the stator and housing assembly 200, and also improve the yield.

[0187] An assembly method using the assembly system of the third aspect embodiment of the present invention according to a fourth aspect embodiment, referring to... Figure 23 As shown, the stator and housing assembly 200 has a rotor mounting position 203 and an end cover mounting position 1502. The assembly method includes the following steps:

[0188] Step S2301: The rotor 101 shaft is installed into the fixing hole 405 and fixed, and the end cover 102 is fixed by the end cover press-fit structure 403 to obtain the rotor and end cover assembly 100.

[0189] Step S2302, the stator (not fully shown in the figure) Figure 2 The diagram shows that the stator busbar electrical terminals 202 and the housing 201 are combined to form a stator and housing assembly 200, and the housing positioning fixture 1000 is used to fix the stator and housing assembly 200.

[0190] Step S2303: Move the rotor and end cover assembly 100 to the first predetermined position to abut the positioning plate 404 against the end edge of the housing 201, and make the annular protrusion 501 or the arc protrusion position and engage with the end edge of the housing 201.

[0191] Step S2304: Heat the housing;

[0192] Understandably, the press-fit assembly, driven by the power system, moves the rotor and end cover assembly 100 above the stator and housing assembly 200, and mates the annular protrusion 501 of the positioning plate 404 of the housing top pressing structure with the housing 201, thus preparing for press-fitting.

[0193] It should be noted that the parameters for heating the casing 201 and the specific timing of the heating are well-known in the field and will not be elaborated here.

[0194] In step S2305, the rotor and end cover assembly 100 is pushed to the second predetermined position by the rotor pressing structure 402, so that the rotor 101 is installed in the rotor mounting position 203 and the end cover 102 is installed at the entrance of the end cover mounting position 1502.

[0195] It should be noted that the guide rod 1004 of the housing positioning fixture 1000 abuts against the lower shaft head 104 of the rotor 101 under the drive of the cylinder. The rotor pressing structure 402 can push the rotor and end cover assembly 100 down. At the same time, the guide rod 1004 provides a lifting force to the rotor and end cover assembly 100.

[0196] It should also be noted that step S2304, which involves heating the housing, and step S2305, which involves using the rotor pressing structure 402 to push the rotor and end cover assembly 100 down, can be performed simultaneously. Alternatively, the housing can be heated for a period of time before pressing down the rotor and end cover assembly 100, or the rotor and end cover assembly 100 can be pressed down for a period of time before heating the housing 201 as needed. Any adjustment to the order of these steps is within the scope of protection of this invention.

[0197] In step S2306, the end cap 102 is pressed into the end cap mounting position 1502 using the second cylinder 502.

[0198] Understandably, after the rotor 101 is installed in place, the second cylinder 502 acts, causing the end cover pressing structure 403 to push the end cover 102 down into the end cover 102 installation of the housing 201, thus completing the assembly of the rotor and end cover assembly 100 with the stator and housing assembly 200.

[0199] It should also be noted that after assembly, the guide rod 1004 of the housing positioning fixture 1000 and the bearing support platform 1002 retract, the grippers in the fixing hole 405 of the rotor pressing structure 402 loosen, the vacuum suction cup 406 of the end cover pressing structure 403 closes, and the pressing assembly moves back to its initial position.

[0200] The assembly method according to the embodiments of the present invention has at least the following beneficial effects: by adopting the assembly system of the third aspect embodiment, the combination of rotor and end cover can be conveniently fixed and positioned, so as to facilitate assembly with the combination of stator and housing during the assembly process, simplifying the assembly process and improving assembly efficiency and yield.

[0201] In some embodiments, refer to Figure 14 , Figure 15 , Figure 18 , Figure 20 As shown, the housing positioning fixture 100 includes a positioning disk 1001 and a guide rod 1004. A central hole 1006 is provided at the center of the positioning disk 1001. The guide rod 1004 is installed in the central hole 1006 and can move axially relative to the housing positioning fixture 1000. (Refer to...) Figure 24 As shown, after moving the rotor and end cap assembly 100 to the first predetermined position, the following steps are also included:

[0202] Step S2401: Extend the guide rod upward to support the rotating shaft.

[0203] In some embodiments, refer to Figures 16-20 As shown, the housing pressing structure includes a plurality of first cylinders 412 disposed on the rotor pressing structure 402. The first piston rods 413 of the plurality of first cylinders 412 are connected to the positioning plate 404 and arranged around the installation space, moving the rotor and end cover assembly 400 to a first predetermined position, as shown in the figure. Figure 25 As shown, it also includes the following steps:

[0204] In step S2501, the first cylinder 412 is used to extend the positioning plate 404 along the top pressing structure of the housing so as to hold and position the positioning plate 404 against the end edge of the housing 201.

[0205] According to an embodiment of the fifth aspect of the present invention, referring to the accompanying drawings, an assembly method is used to press-fit a rotor and end cover assembly 100 into a stator and housing assembly 200, the stator and housing assembly 200 having a rotor mounting position 203 and an end cover mounting position 1502, as shown in the accompanying drawings. Figure 26 As shown, it includes the following steps:

[0206] Step S2601: Combine the rotor 101 and the end cover 102 to form a rotor and end cover assembly 100;

[0207] Step S2602: The stator and housing 201 are combined to form a stator and housing assembly 200;

[0208] Step S2603: Move the rotor and end cover assembly 100 to a first predetermined position to align it with the stator and housing assembly 200;

[0209] Step S2604: Heat the housing 201;

[0210] Step S2605: Press the rotor and end cover assembly 100 to the second predetermined position so that the rotor 101 is installed in the rotor mounting position 203 and the end cover 102 is installed at the entrance of the end cover mounting position 1502.

[0211] It should be emphasized that step S2604, which involves heating the housing, and step S2605, which involves using the rotor pressing structure 402 to push the rotor and end cover assembly 100 down, can be performed simultaneously. Alternatively, the housing can be heated for a period of time before pressing down the rotor and end cover assembly 100, or the rotor and end cover assembly 100 can be pressed down for a period of time before heating the housing 201 as needed. Any adjustment to the order of these steps is within the scope of protection of this invention.

[0212] Step S2606: Press the end cap 102 into the end cap mounting position 1502.

[0213] The assembly method according to the embodiments of the present invention has at least the following beneficial effects: by adopting the above assembly method, it is convenient to assemble the rotor and end cover assembly 100 with the stator and housing assembly 200 during the assembly process, simplifying the assembly process and improving assembly efficiency and yield.

[0214] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembly system, characterized in that, The assembly system includes components for press-fitting the rotor and end cover assembly into the stator and housing assembly: The housing has a top-pressing structure, which internally defines an installation space and has an annular positioning plate at the end, which defines an opening communicating with the installation space. The rotor press-fit structure is at least partially disposed within the mounting space and can be driven to move axially relative to the housing pressing structure. The rotor press-fit structure is provided with fixing holes for fixing the rotor. An end cap press-fit structure is connected to the end of the rotor press-fit structure to fix the end cap and can be driven to move axially relative to the rotor press-fit structure. The end cap press-fit structure is provided with a through hole communicating with the fixing hole. The rotor pressing structure is provided with a plurality of first protrusions spaced apart from the end cover pressing structure, and a first groove is formed between adjacent first protrusions. The end cover pressing structure is provided with a plurality of second protrusions from the rotor pressing structure, and the plurality of second protrusions match the plurality of first grooves. The positioning plate is provided with annular protrusions or multiple arc-shaped protrusions around the opening for positioning the housing.

2. The assembly system according to claim 1, characterized in that, The housing top pressure structure is configured as a cylinder, and the end of the cylinder has a flange extending radially along the cylinder to form the positioning plate.

3. The assembly system according to claim 1, characterized in that, The housing pressing structure includes a plurality of first cylinders disposed on the rotor pressing structure, and the first piston rods of the plurality of first cylinders are connected to the positioning plate and arranged around the installation space.

4. The assembly system according to claim 1, characterized in that, A second cylinder is provided on the end face of the rotor pressing structure facing the end cover pressing structure, and the second piston rod of the second cylinder is connected to the end cover pressing structure.

5. The assembly system according to claim 4, characterized in that, The end cap pressing structure is provided with a guide post on the end face facing the rotor pressing structure, and the rotor pressing structure is provided with a clearance hole for the guide post to pass through.

6. The assembly system according to claim 1, characterized in that, The end face of the end cap press-fit structure is provided with multiple suction cups, which are evenly arranged around the through hole.

7. The assembly system according to claim 6, characterized in that, The end cap press-fit structure has multiple mounting grooves at its end, which are evenly arranged around the through hole. A push rod is installed in each mounting groove, and a spring is installed at the bottom of the push rod. The push rod is connected to a limiting structure to prevent it from coming out.

8. The assembly system according to claim 7, characterized in that, Along the radial direction away from the through hole of the housing pressure structure, the suction cup and the push rod are sequentially arranged.

9. The assembly system according to claim 1, characterized in that, The assembly system further includes a housing positioning fixture, which includes: The positioning disk has protrusions formed around its periphery, and a central hole is provided at the center of the positioning disk. The bearing support platform is ring-shaped and is disposed on the positioning plate around the central hole; A guide rod is installed in the central hole and can move axially relative to the housing positioning fixture to support the rotor shaft.

10. The assembly system according to claim 9, characterized in that, The top end of the guide rod is provided with a positioning protrusion that cooperates with the rotating shaft.

11. The assembly system according to claim 1, characterized in that, The assembly system also includes a heating device for heating the housing.

12. An assembly method using the assembly system as described in any one of claims 1 to 11, characterized in that, The assembly of the stator and housing has a rotor mounting position and an end cover mounting position, and the assembly method includes the following steps: The rotor shaft is installed into the fixing hole and fixed, and the end cover is fixed by the end cover press-fitting structure to obtain the combination of the rotor and the end cover; The stator and the housing are combined to form the stator and housing assembly; The assembly of the rotor and end cover is moved to a first predetermined position to abut and position the positioning plate against the end edge of the housing; The casing is heated; The rotor pressing structure is used to push the assembly of the rotor and the end cover to a second predetermined position, so that the rotor is installed in the rotor mounting position and the end cover is installed at the entrance of the end cover mounting position. The end cap is press-fitted into the end cap mounting position using the end cap press-fit structure.

13. An assembly system, characterized in that, The assembly system includes components for press-fitting the rotor and end cover assembly into the stator and housing assembly: The housing has a top-pressing structure, which internally defines an installation space and has an annular positioning plate at the end. The positioning plate defines an opening that communicates with the installation space. The positioning plate has annular protrusions or multiple arc-shaped protrusions around the opening for positioning the housing. The rotor press-fit structure is at least partially disposed within the mounting space and can be driven to move axially relative to the housing pressing structure. The rotor press-fit structure is provided with fixing holes for fixing the rotor. An end cap press-fit structure is connected to the end of the rotor press-fit structure to fix the end cap and can be driven to move axially relative to the rotor press-fit structure. The end cap press-fit structure is provided with a through hole communicating with the fixing hole. A housing positioning fixture is used to fix the assembly of the stator and the housing. A heating device for heating the casing; The rotor pressing structure has a second cylinder on its end face facing the end cover pressing structure, and the second piston rod of the second cylinder is connected to the end cover pressing structure.

14. An assembly method using the assembly system as described in claim 13, characterized in that, The assembly of the stator and housing has a rotor mounting position and an end cover mounting position, and the assembly method includes the following steps: The rotor shaft is installed into the fixing hole and fixed, and the end cover is fixed by the end cover press-fitting structure to obtain the combination of the rotor and the end cover; The stator and the housing are combined to form the stator and housing assembly, and the housing positioning fixture is used to fix the stator and housing assembly. The assembly of the rotor and end cover is moved to a first predetermined position, such that the positioning plate abuts against the end edge of the housing, and the annular protrusion or the arc-shaped protrusion is positioned and engaged with the end edge of the housing. The heating device is used to heat the casing; The rotor pressing structure is used to push the assembly of the rotor and the end cover to a second predetermined position, so that the rotor is installed in the rotor mounting position and the end cover is installed at the entrance of the end cover mounting position. The end cap is pressed into the end cap mounting position using the second cylinder.

15. The assembly method according to claim 14, characterized in that, The housing positioning fixture includes a positioning plate and a guide rod. A central hole is provided at the center of the positioning plate, and the guide rod is installed in the central hole and can move axially relative to the housing positioning fixture. After moving the assembly of the rotor and the end cover to the first predetermined position, the following steps are also included: The guide rod extends upward to support the rotating shaft.

16. The assembly method according to claim 14, characterized in that, The housing pressing structure includes a plurality of first cylinders disposed on the rotor pressing structure. The first piston rods of the plurality of first cylinders are connected to the positioning plate and arranged around the mounting space. Moving the assembly of the rotor and the end cover to the first predetermined position further includes the following steps: The positioning plate is extended along the top pressing structure of the housing by the first cylinder, so as to hold and position the positioning plate against the end edge of the housing.

Images