Manufacturing method of motor and motor

Abstract

A motor manufacturing method and a motor, the method comprising: providing a housing, the housing being provided with an accommodating hole, the inner wall of the accommodating hole being convexly provided with a first limiting portion and a second limiting portion which are axially arranged at an interval; a stator is provided, the stator comprises a plurality of stator laminations arranged in a stacked mode, and a matching part is arranged on the peripheral side face of the stator; enabling the matching part to be matched with the first limiting part, and mounting the stator into the accommodating hole until one axial end of the stator is propped against the second limiting part, pressing the plurality of stator laminations and enabling the stator to be positioned between the first limiting part and the second limiting part, so that the stator and the shell relatively rotate along the circumferential direction of the accommodating hole; the matching part and the first limiting part are staggered along the circumferential direction of the accommodating hole; the stator is released, and the two axial ends of the stator abut against the first limiting part and the second limiting part respectively under the action of the elastic force of the stator laminations. Therefore, low-cost, convenient and reliable assembly of the motor is realized at the same time, and the difficulty of part manufacturing and finished product assembly of the motor is reduced.

Description

Technical Field

[0001] This application relates to the field of electric motor technology, and more specifically, to a method for manufacturing an electric motor and an electric motor. Background Technology

[0002] In some known motors, there are various limiting methods for fixing the stator to the housing. However, currently, no limiting method can simultaneously achieve the effects of simple assembly and reliable limiting.

[0003] Specifically, the stator and housing are often positioned using methods such as screw positioning, welding positioning, and adhesive positioning. Each of these positioning methods has its own advantages and disadvantages, as follows: Screw positioning is advantageous because it is simple to assemble and can be disassembled, but its disadvantages include large size and high precision requirements for the screw holes in the housing; Welding positioning is advantageous because it is quick to assemble and does not require consideration of the impact of axial dimensional chains on accuracy, but its disadvantages include high labor costs, non-disassembly, and limited application range; Adhesive positioning is advantageous because it is simple to assemble and low in cost, but its disadvantages include easy glue overflow and potential failure at high temperatures.

[0004] Therefore, it is indeed necessary to provide an improved motor to overcome the shortcomings of the prior art. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a motor that takes into account both the ease of assembly between the stator and the housing and the reliability of the limit position.

[0006] This application provides a method for manufacturing an electric motor, comprising: providing a housing, the housing having a receiving hole, the inner wall of the receiving hole having a first limiting portion and a second limiting portion protruding, the first limiting portion and the second limiting portion being spaced apart along the axial direction of the receiving hole; providing a stator, the stator comprising a plurality of stacked stator laminations, the outer peripheral side of the stator having a mating portion; engaging the mating portion with the first limiting portion and inserting the stator into the receiving hole until one axial end of the stator abuts against the second limiting portion; pressing the plurality of stator laminations together and positioning the stator between the first limiting portion and the second limiting portion; rotating the stator and the housing relative to each other along the circumferential direction of the receiving hole, and offsetting the mating portion and the first limiting portion along the circumferential direction of the receiving hole; releasing the stator, under the elastic force of the plurality of stator laminations, the two axial ends of the stator abut against the first limiting portion and the second limiting portion respectively.

[0007] According to the motor manufacturing method of this application, during the assembly process, the stator can be easily inserted into the receiving hole by the mating part and the first limiting part cooperating. After the stator abuts against the second limiting part, pressure is applied to the multiple stacked stator laminations to reduce the axial length of the stator to less than the distance between the first and second limiting parts. This allows the stator to rotate circumferentially along the receiving hole until the mating part and the first limiting part are misaligned. After the pressure is released, the multiple stacked stator laminations automatically return to their original position and abut against the first limiting part. In this way, the elastic force generated by the multiple stacked stator laminations is applied to the first and second limiting parts, so that the stator is securely clamped between the first and second limiting parts, thereby ensuring the assembly reliability between the stator and the housing. This assembly method is simple and easy to implement with fewer steps. Compared with known welding and gluing methods, the possibility of failure is greatly reduced. Furthermore, there is no need to set additional screws to limit the stator, thus eliminating the need to drill high-precision screw holes in the housing, which can further reduce the processing cost of the motor. Moreover, the disassembly is simple. Just apply pressure to the stator and rotate it until the mating part corresponds to the first limiting part, and the stator can be removed from the housing. Thus, it takes into account multiple advantages such as low-cost assembly, convenient assembly, and assembly reliability.

[0008] In one possible embodiment, the first limiting portion is a fixed protrusion; the mating portion is a mating groove formed on the outer peripheral surface of the stator, the mating groove penetrating the stator along its axial direction, and the cross-section of the mating groove being contoured to the cross-section of the fixed protrusion. The step of engaging the mating portion with the first limiting portion includes aligning the fixed protrusion and the mating groove along the axial direction of the receiving hole, and moving the first limiting portion relative to the mating groove until the first limiting portion moves from one end of the mating groove to the other end of the mating groove.

[0009] In one possible embodiment, after the step of the two ends of the stator respectively abutting against the first limiting portion and the second limiting portion, the method of manufacturing the motor further includes: providing a fixing portion and inserting the fixing portion into the mating groove so that the fixing portion restricts the stator from rotating relative to the housing in the circumferential direction of the housing.

[0010] This application also provides an electric motor, including a housing and a stator. The housing has a receiving hole, and the inner wall of the receiving hole has a first limiting portion and a second limiting portion protruding from it, the first limiting portion and the second limiting portion being spaced apart along the axial direction of the receiving hole. The stator includes a plurality of stator laminations stacked along the axial direction, the plurality of stator laminations being clamped between the first limiting portion and the second limiting portion, and the plurality of stator laminations applying an elastic force along the axial direction to the first limiting portion and the second limiting portion. The stator has a mating portion along its outer peripheral side, the mating portion engaging with the first limiting portion to allow the stator to be inserted into the receiving hole from the axial direction, and after the stator rotates relative to the receiving hole, the stator abuts against the second limiting portion and the first limiting portion.

[0011] In one possible embodiment, the mating part is a mating groove formed on the outer peripheral side of the stator, the mating groove passing through the stator along the axial direction of the stator, and the first limiting part being able to move along one end of the mating groove to the other end of the mating groove.

[0012] In one possible embodiment, the motor further includes a fixing part disposed in the mating groove, the fixing part being fixedly connected between the stator and the housing to limit the stator along the circumferential direction of the housing.

[0013] In one possible embodiment, the second limiting portion is an annular protrusion that protrudes from the inner wall of the receiving hole.

[0014] In one possible embodiment, the stator includes an annular yoke and a protrusion extending inward from the inner surface of the yoke, wherein the projection of the first limiting portion onto the yoke does not extend beyond the inner surface of the yoke.

[0015] In one possible embodiment, the stator has a free state and a compressed state. In the free state, the total length of the plurality of stator laminations along the axial direction is greater than the distance between the first limiting portion and the second limiting portion along the axial direction. In the compressed state, the total length of the plurality of stator laminations along the axial direction is less than or equal to the distance between the first limiting portion and the second limiting portion along the axial direction. Both ends of the stator abut against the first limiting portion and the second limiting portion, respectively, and simultaneously, both ends of the stator apply an elastic force to both the first limiting portion and the second limiting portion.

[0016] In one possible embodiment, there are multiple first limiting portions, which are distributed sequentially at intervals along the circumference of the receiving hole; there are multiple mating portions, which are distributed sequentially at intervals along the circumference of the receiving hole, and the arc between two adjacent mating portions is the same as the arc between two adjacent first limiting portions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart illustrating a method for manufacturing an electric motor according to an embodiment of this application.

[0019] Figure 2 This is a three-dimensional structural diagram of the housing according to an embodiment of this application.

[0020] Figure 3 This is a three-dimensional structural diagram of the housing according to an embodiment of this application from another perspective.

[0021] Figure 4 This is a cross-sectional view of the housing according to an embodiment of this application.

[0022] Figure 5 This is a three-dimensional structural diagram of the stator according to an embodiment of this application.

[0023] Figure 6 This is a side view of the stator according to an embodiment of this application.

[0024] Figure 7 This is a cross-sectional view of a motor according to an embodiment of this application.

[0025] Figure 8 This is a schematic diagram of the structure of a motor according to an embodiment of this application.

[0026] Figure 9 This is a schematic diagram of the stator along the radial direction according to an embodiment of this application.

[0027] Figure 10 This is a radial schematic diagram of the stator and housing after assembly according to an embodiment of this application, at which point the stator and housing have completed relative rotation.

[0028] Figure 11 This is a radial schematic diagram of the stator and housing after assembly according to another embodiment of this application. At this time, the stator has not yet completed the relative rotation action with the housing.

[0029] Figure 12 This is a radial schematic diagram of the housing according to an embodiment of this application.

[0030] Explanation of key component symbols:

[0031] Motor…100; Housing…10; First limiting part…21; Fixing protrusion…21a; Second limiting part…22; Annular protrusion…22a; Stator…30; Stator laminations…31; Yoke…32; Protrusion…33; Mating part…40; Fixing part…50; Mating groove…C1; Receiving hole…K1; First surface…P1; Second surface…P2; Third surface…P3; Fourth surface…P4; Axial…X; Radial…Y; Circumferential…R.

[0032] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0033] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] See Figure 1 This embodiment provides a method for manufacturing an electric motor 100, including the following steps:

[0038] S1: Provides housing 10. See also Figures 2 to 4The housing 10 has a receiving hole K1. The inner wall of the receiving hole K1 is provided with a first limiting part 21 and a second limiting part 22. The first limiting part 21 and the second limiting part 22 are arranged at intervals along the axial direction X of the receiving hole K1.

[0039] S2: Stator 30 is provided. See also Figure 5 and Figure 6 The stator 30 includes a plurality of stator laminations 31 stacked together, and a mating portion 40 is provided on the radial Y-side of the stator 30. In this step, the plurality of stator laminations 31 are stacked together along the axial X of the receiving hole K1. Each stator lamination 31 has a sub-matting portion 40 on its radial Y-side, and the sub-matting portions 40 of the plurality of stator laminations 31 are stacked together along the axial X to form the mating portion 40.

[0040] S3: Install stator 30. See also Figure 7 and Figure 8 The mating part 40 is engaged with the first limiting part 21, and the stator 30 is inserted into the receiving hole K1 until the axial X end of the stator 30 abuts against the second limiting part 22.

[0041] S4: Press the stator 30. Due to the lamination coefficient of the stator 30, multiple stator laminations 31 can be pressed together, and the stator 30 is positioned between the first limiting part 21 and the second limiting part 22.

[0042] S5: Rotate the stator 30 or the housing 10. Rotate the stator 30 and the housing 10 relative to each other along the circumferential direction R of the receiving hole K1, and make the mating part 40 and the first limiting part 21 offset along the circumferential direction R of the receiving hole K1.

[0043] S6: Release stator 30. Under the elastic force of multiple stator laminations 31, the two ends of the stator 30 in the axial direction X abut against the first limiting part 21 and the second limiting part 22, respectively.

[0044] According to the manufacturing method of the motor 100 in this embodiment, during the assembly process, the stator 30 can be conveniently inserted into the receiving hole K1 by the cooperation of the mating part 40 and the first limiting part 21. After the stator 30 abuts against the second limiting part 22, pressure is applied to the stacked stator laminations 31 to reduce the length of the stator 30 along the axial direction X to less than the distance between the first limiting part 21 and the second limiting part 22. As a result, the stator 30 can rotate along the circumferential direction R of the receiving hole K1 until the mating part 40 is misaligned with the first limiting part 21. After the pressure is released, the stacked stator laminations 31 recover on their own and abut against the first limiting part 21. In this way, the elastic force generated by the stacked stator laminations 31 is applied to the first limiting part 21 and the second limiting part 22, so that the stator 30 is securely clamped between the first limiting part 21 and the second limiting part 22, thereby ensuring the assembly reliability between the stator 30 and the housing 10. This assembly method is simple and easy to implement with fewer steps. Compared with known welding and gluing methods, the possibility of failure is greatly reduced. Furthermore, there is no need to set additional screws to limit the stator 30, thus eliminating the need to drill high-precision screw holes on the housing. This can further reduce the processing cost of the motor 100. Moreover, the disassembly is simple. Just apply pressure to the stator 30 and rotate the stator 30 until the mating part 40 corresponds to the first limiting part 21, and the stator 30 can be removed from the housing 10. This method combines the advantages of low-cost assembly, convenient assembly, and reliable assembly.

[0045] Furthermore, when the stator 30 is installed between the first limiting part 21 and the second limiting part 22, a portion of the elastic force between the multiple stator laminations 31 can be decomposed into a radial force along the receiving hole K1, which can limit the displacement of the stator 30 relative to the housing 10 in the circumferential direction R, so as to ensure the stability of the installation between the stator 30 and the housing 10.

[0046] Specifically, the stator 30 has a free state and a compressed state. In the free state, there is a gap between each pair of adjacent stator laminations 31, and the total length L1 of the stator laminations 31 along the axial direction X is greater than the distance L2 between the first limiting part 21 and the second limiting part 22 along the axial direction X. In the compressed state, the gap between each pair of adjacent stator laminations 31 is reduced by pressure, so the total length of the stator laminations 31 along the axial direction X is less than or equal to the distance L2 between the first limiting part 21 and the second limiting part 22 along the axial direction X. After the stator 30 is installed between the first limiting part 21 and the second limiting part 22, under the action of the spring force, the gap between each pair of adjacent stator laminations 31 increases, causing the stator 30 to recover from the compressed state to the free state until both ends of the stator 30 along the axial direction X respectively abut against the first limiting part 21 and the second limiting part 22. At this time, the total length of the stator laminations 31 along the axial direction X is the same as L2.

[0047] In this step, the assembly process of inserting the stator 30 into the receiving hole K1 can be performed in either of the following two ways. First, fix the stator 30, position the stator 30 and the housing 10 along the axial direction X of the receiving hole K1, so that the mating part 40 of the stator 30 engages with the first limiting part 21, and move the housing 10 along the axial direction X until the stator 30 abuts against the second limiting part 22. Second, fix the housing 10, position the stator 30 and the housing 10 along the axial direction X of the receiving hole K1, so that the mating part 40 of the stator 30 engages with the first limiting part 21, and move the stator 30 along the axial direction X until the stator 30 abuts against the second limiting part 22.

[0048] In this step, the relative rotation of the stator 30 and the housing 10 can be accomplished by fixing the stator 30 and rotating the housing 10 relative to the stator 30, or by fixing the housing 10 and rotating the stator 30 relative to the housing 10, or by rotating the stator 30 and the housing 10 simultaneously.

[0049] In some implementations, see Figure 4 and Figure 6 The first limiting part 21 has a first surface P1 facing the second limiting part 22 along the axial direction X, and the second limiting part 22 has a second surface P2 facing the first limiting part 21 along the axial direction X. Multiple stator laminations 31 have a third surface P3 and a fourth surface P4 at both ends along their axial direction X, respectively. After the motor 100 is assembled, the first surface P1 is attached to the third surface P3, and the second surface P2 is attached to the fourth surface P4, with both the first and third surfaces P1 and P3 perpendicular to the axial direction X. This facilitates a better fit between the stator 30 and the first and second limiting parts 21 and 22, thereby improving the assembly effect of the motor 100.

[0050] In some embodiments, the stator 30 has a free state and a compressed state. See also Figure 4 and Figure 6 In the free state, the total length L1 of the multiple stator laminations 31 along the axial direction X is greater than the distance L2 between the first limiting part 21 and the second limiting part 22 along the axial direction X. In the compressed state, the total length of the multiple stator laminations 31 along the axial direction X is less than or equal to the distance L2 between the first limiting part 21 and the second limiting part 22 along the axial direction X. The two ends of the stator 30 abut against the first limiting part 21 and the second limiting part 22 respectively, and at the same time, the two ends of the stator 30 apply elastic force to both the first limiting part 21 and the second limiting part 22. In this way, the stator 30 is stably abutted against the first limiting part 21 and the second limiting part 22 along the axial direction X, thereby improving the fixing reliability between the stator 30 and the housing 10.

[0051] In some embodiments, see Figure 7 and Figure 8The first limiting part 21 is a fixed protrusion 21a. See also Figure 9 The mating part 40 is a mating groove C1 formed on the outer peripheral surface of the stator 30. The mating groove C1 penetrates the stator 30 along the axial direction X, and the cross-section of the mating groove C1 is set in the same shape as the cross-section of the fixed protrusion 21a. The step of mating the mating part 40 with the first limiting part 21 in step S3 includes aligning the fixed protrusion 21a with the mating groove C1 along the axial direction X, moving the stator 30 relative to the housing 10 along the axial direction X, and moving the first limiting part 21 relative to the mating groove C1 until the first limiting part 21 moves from one end of the mating groove C1 to the other end of the mating groove C1.

[0052] Thus, the machining steps of opening the mating groove C1 on the outer peripheral surface of the stator 30 are simple and easy to carry out, with less material loss. Furthermore, the edge of the stator lamination 31 can maintain a small gap with the inner wall of the housing 10, thereby reducing the possibility of relative displacement of the stator 30 and the housing 10 in the circumferential direction R.

[0053] In other embodiments, the mating groove C1 can also be configured to be open at one end along the axial direction X and closed at the other end along the axial direction X.

[0054] In other embodiments, the mating part 40 is a cross-section (not shown) on the outer peripheral surface of the cylindrical stator 30. This cross-section is parallel to the axial direction X and cuts the outer circular surface of the stator 30 into two parts: a straight edge and a rounded edge. When assembling the motor 100, the mating part of the housing 10 is made to mate with the first limiting part 21 of the stator 30. This is achieved by mates the straight edge with the first limiting part 21. The subsequent steps are to press, rotate, and release the stator.

[0055] The fixing protrusion 21a can be integrally formed on the inner wall of the housing 10.

[0056] In other embodiments, the mating part 40 may also be configured as a protruding structure protruding from the edge of the stator lamination 31. The first limiting part 21 has a groove structure adapted to the protruding structure on the surface facing the inside of the receiving hole K1, and an additional abutment is provided on the edge of the stator lamination 31. After the stator 30 is inserted into the receiving hole K1, the stator 30 is rotated relative to the housing 10 until the abutment abuts against the first limiting part 21, so that the stator 30 is clamped between the first limiting part 21 and the second limiting part 22.

[0057] In some embodiments, see Figure 10 After step S3, the manufacturing method of motor 100 further includes: providing a fixing part 50 and installing the fixing part 50 into the mating groove C1 so that the fixing part 50 restricts the stator 30 from rotating relative to the housing 10 in the circumferential direction R of the housing 10.

[0058] In this way, the fixing part 50 can not only further limit the stator 30 and improve the fixing reliability of the stator 30 and the housing 10, but also close the mating groove C1 to reduce the possibility of foreign objects entering the mating groove C1 and affecting the operation of the motor 100, thereby improving the working reliability of the motor 100.

[0059] In some embodiments, the step of inserting the fixing part 50 into the mating groove C1 can be performed in one or both of the following ways. First, the fixing part 50 is made of adhesive. Adhesive is injected from one open end of the mating groove C1, filling the groove and fixing it between the stator 30 and the housing 10, thereby fixing the stator 30 and the housing 10. This method not only fixes the stator 30 to the housing 10 but also reduces the possibility of adhesive overflow, ensuring the assembly quality of the motor 100. Second, the fixing part 50 is a plug-in structure, which can be a key, pin, screw, bolt, etc. The plug-in structure is inserted into the mating groove C1 and fixedly connected to the stator 30 and / or the housing 10.

[0060] Please see again Figure 7 and Figure 8 This embodiment also provides a motor 100. The motor 100 includes a housing 10 and a stator 30. The housing 10 has a receiving hole K1, and the inner wall of the receiving hole K1 is provided with a first limiting part 21 and a second limiting part 22 protrudingly. The first limiting part 21 and the second limiting part 22 are spaced apart along the axial direction X of the receiving hole K1. The stator 30 includes a plurality of stator laminations 31 stacked along the axial direction X. The plurality of stator laminations 31 are sandwiched between the first limiting part 21 and the second limiting part 22, and the plurality of stator laminations 31 apply an elastic force along the axial direction X to the first limiting part 21 and the second limiting part 22. The stator 30 has a mating part 40 on the radial Y side of the receiving hole K1. The mating part 40 engages with the first limiting part 21 so that the stator 30 can be inserted into the receiving hole K1 from the axial direction X, and after the stator 30 rotates relative to the receiving hole K1, the stator 30 abuts against the second limiting part 22 and the first limiting part 21.

[0061] The stator 30 according to this embodiment has the advantages of the stator 30 assembled by the aforementioned stator 30 assembly method, which will not be repeated here.

[0062] In some embodiments, see Figure 9 The mating part 40 is a mating groove C1 opened on the outer peripheral side of the stator 30. The mating groove C1 passes through the stator 30 along the axial direction X of the stator 30. The first limiting part 21 can move along one end of the mating groove C1 to the other end of the mating groove C1.

[0063] Thus, the machining steps of opening the mating groove C1 on the outer peripheral surface of the stator 30 are simple and easy to carry out, with less material loss. Furthermore, the edge of the stator lamination 31 can maintain a small gap with the inner wall of the housing 10, thereby reducing the possibility of relative displacement of the stator 30 and the housing 10 in the circumferential direction R.

[0064] In some embodiments, see Figure 10 The motor 100 also includes a fixing part 50. The fixing part 50 is disposed within the mating groove C1 and is fixedly connected between the stator 30 and the housing 10 to limit the stator 30 along the circumferential direction R of the housing 10. This further improves the fixing effect between the stator 30 and the housing 10 along the circumferential direction R. The fixing part 50 can be constructed as any one of the following: adhesive structure, key, pin, bolt, screw, etc.

[0065] In some embodiments, the second limiting portion 22 is an annular protrusion 22a, which protrudes from the inner wall of the receiving hole K1. This increases the contact area between the second limiting portion 22 and the stator 30, thereby improving the limiting effect of the second limiting portion 22 on the stator 30.

[0066] In other embodiments, the second limiting part 22 may be provided as a plurality of arc-shaped protrusions, the plurality of arc-shaped protrusions being spaced apart along the circumferential direction R of the receiving hole K1, and the projection of the first limiting part 21 along the axial direction X being located on the arc-shaped protrusions, so as to ensure that the stator 30 is clamped by the first limiting part 21 and the plurality of arc-shaped protrusions.

[0067] In some embodiments, see Figure 11 The stator 30 includes an annular yoke 32 and a protrusion 33 protruding inward from the inner surface of the yoke 32. The projection of the first limiting part 21 on the yoke 32 does not exceed the inner surface of the yoke 32. In this way, it can be ensured that the yoke 32 abuts against the first limiting part 21, and the first limiting part 21 is prevented from extending into the inner side of the yoke 32 and affecting the winding of the winding, thereby ensuring the assembly quality of the motor 100.

[0068] In some embodiments, the projection of the second limiting part 22 onto the yoke 32 does not extend beyond the inner surface of the yoke 32. In this way, the second limiting part 22 can also be prevented from affecting the winding of the winding, so as to ensure the assembly quality of the motor 100.

[0069] In some embodiments, see Figure 11 and Figure 12There are multiple first limiting parts 21, which are distributed sequentially and spaced apart along the circumferential direction R of the receiving hole K1. There are also multiple mating parts 40, which are distributed sequentially and spaced apart along the circumferential direction R of the housing 10, and the arc between two adjacent mating parts 40 is the same as the arc between two adjacent first limiting parts 21. Thus, during the assembly of the motor 100, when the stator 30 and the housing 10 rotate relative to each other until one of the first limiting parts 21 and its adjacent mating part 40 are misaligned along the circumferential direction R, the other first limiting parts 21 and mating parts 40 are also misaligned accordingly, thereby improving the assembly efficiency of the stator 30 and the housing 10. Furthermore, the multiple first limiting parts 21 distributed along the circumferential direction R can uniformly apply force to the stator 30, thereby improving the stability of the stator 30 mounted on the housing 10 along the axial direction X.

[0070] Specifically, in this embodiment, a plurality of first limiting parts 21 are evenly spaced along the circumferential direction R of the receiving hole K1, and a plurality of mating parts 40 are evenly spaced along the circumferential direction R of the receiving hole K1.

[0071] In this embodiment, the stator 30 is shown in detail as a cylindrical shape, and the housing 10 is shown in detail as a cylindrical shape. When the stator 30 and the housing 10 are assembled in place, their axial direction X, radial direction Y, and circumferential direction R are respectively coincident. In some embodiments, the shape of the stator 30 can be rectangular or other polygonal, and the shape of the housing 10 can also be designed according to the shape of the stator 30 and is not limited to a cylindrical shape.

[0072] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A method for manufacturing a motor, characterized in that: include: A shell is provided, wherein a receiving hole is formed in the shell, and a first limiting portion and a second limiting portion are protrudingly provided on an inner wall of the receiving hole, wherein the first limiting portion and the second limiting portion are spaced apart along the axial direction of the receiving hole; A stator is provided, the stator comprising a plurality of stacked stator laminations, and a matching portion is provided on an outer peripheral side surface of the stator; Make the matching portion match the first limiting portion, and install the stator into the receiving hole until one axial end of the stator abuts against the second limiting portion; Compressing the plurality of stator laminations from the other axial end of the stator, and positioning the stator between the first limiting portion and the second limiting portion; The stator and the housing are relatively rotated along the circumferential direction of the receiving hole, and the matching portion and the first limiting portion are staggered along the circumferential direction of the receiving hole; The stator is released, and under the elastic force of the plurality of stator laminations, the axial ends of the stator are respectively pressed against the first limiting portion and the second limiting portion.

2. The method for manufacturing a motor according to claim 1, characterized in that: The first limiting portion is a fixed protrusion; The matching portion is a matching groove formed on the outer peripheral surface of the stator, the matching groove penetrates the stator along the axial direction of the stator, and the cross section of the matching groove is configured to be similar to the cross section of the fixing protrusion; The step of making the matching portion match with the first limiting portion includes making the fixing protrusion correspond to the matching groove along the axial direction of the receiving hole, and moving the first limiting portion relative to the matching groove until the first limiting portion moves from one end of the matching groove to the other end of the matching groove.

3. The method for manufacturing a motor according to claim 2, characterized in that: After the steps of respectively abutting the first limiting portion and the second limiting portion at both ends of the stator, the method for manufacturing the motor further includes: A fixing portion is provided and installed in the matching groove so that the fixing portion restricts the stator from rotating relative to the housing along the circumferential direction of the housing.

4. A motor, characterized in that: include: A housing, wherein a receiving hole is formed in the housing, and a first limiting portion and a second limiting portion are protrudingly provided on an inner wall of the receiving hole, wherein the first limiting portion and the second limiting portion are spaced apart along the axial direction of the receiving hole; A stator, wherein the stator comprises a plurality of stator laminations stacked along the axial direction, the plurality of stator laminations being clamped between the first limiting portion and the second limiting portion, and the plurality of stator laminations applying elastic force along the axial direction to the first limiting portion and the second limiting portion; a mating portion is provided on the outer peripheral side surface of the stator, and the mating portion is mated with the first limiting portion so that the stator can be inserted into the receiving hole from the axial direction, and after the stator and the receiving hole rotate relative to each other, the stator is pressed against between the second limiting portion and the first limiting portion.

5. The motor according to claim 4, characterized in that: The matching portion is a matching groove opened on the outer peripheral side surface of the stator, and the matching groove penetrates the stator along the axial direction of the stator. The first limiting portion can move along one end of the matching groove to the other end of the matching groove.

6. The motor according to claim 5, characterized in that: The motor further includes a fixing portion, which is disposed in the matching groove and fixedly connected between the stator and the housing to limit the stator along the circumferential direction of the housing.

7. The motor according to claim 4, characterized in that: The second limiting portion is an annular protrusion, and the annular protrusion is convexly arranged on the inner wall of the receiving hole.

8. The motor according to claim 4, characterized in that: The stator comprises an annular yoke and a convex portion protruding inward from an inner surface of the yoke, and a projection of the first limiting portion on the yoke does not exceed the inner surface of the yoke.

9. The motor according to claim 4, characterized in that: The stator has a free state and a compressed state; In the free state, the total length of the plurality of stator laminations along the axial direction is greater than the spacing between the first limiting portion and the second limiting portion along the axial direction; In the compressed state, the total length of the plurality of stator laminations along the axial direction is less than or equal to the spacing between the first limiting portion and the second limiting portion along the axial direction; The two ends of the stator respectively abut against the first limiting portion and the second limiting portion, and at the same time, the two ends of the stator apply elastic force to both the first limiting portion and the second limiting portion.

10. The motor according to claim 4, characterized in that: There are a plurality of first limiting portions, and the plurality of first limiting portions are sequentially spaced and distributed along the circumference of the receiving hole; There are multiple matching parts, and the matching parts are distributed in sequence along the circumference of the receiving hole, and the curvature between two adjacent matching parts is the same as the curvature between two adjacent first limiting parts.

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