An electric control device mounting structure and an electric motor
By setting up a combination structure of multiple limiting parts and rear clamping parts inside the motor housing, the problem of limited operating space in certain scenarios of traditional electric controller installation structures is solved, realizing convenient installation of electric controllers and compact layout of motor structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HYSON ELECTRONICS TECH
- Filing Date
- 2025-06-23
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional electronic controller mounting structures make screw tightening difficult in certain scenarios, especially when the controller needs to be inserted along its length from the rear opening of the motor housing, resulting in limited operating space and inconvenient installation.
The device employs a combination structure of multiple limiting parts within the motor housing and a rear clamping part. By limiting the left, right, up, down, and front sides of the electric controller, combined with the rear clamping, stable installation of the electric controller is achieved.
It enables convenient installation of the electronic controller in various scenarios without changing the existing electronic controller structure, reducing costs and improving installation convenience.
Smart Images
Figure CN224289554U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, specifically to an electronic controller mounting structure and a motor. Background Technology
[0002] To achieve precise control and protection functions, motors are typically equipped with an electronic controller, which consists of a control board and a housing. In traditional electronic controller mounting structures, several mounting holes are provided on the housing of the controller. The axis of these mounting holes is parallel to the height direction of the controller, that is, perpendicular to the horizontal plane of the control board. The controller is then mounted to the rear of the motor body using screws.
[0003] However, this mounting structure has certain limitations in some scenarios. For example, when the controller needs to be inserted along its length from the rear opening of the motor housing, the limited operating space makes normal screw tightening difficult. Furthermore, the controller's housing structure is already fixed, and redesigning it would significantly increase costs and development time. Therefore, there is an urgent need to provide a mounting structure that allows for convenient installation in various scenarios based on the existing controller housing structure. Utility Model Content
[0004] This utility model addresses the technical problem of inconvenient installation of existing electronic controller installation structures by proposing an electronic controller installation structure and motor that facilitates convenient installation of electronic controllers in various scenarios. The motor structure is compact, rationally laid out, and small and simple.
[0005] The technical solution of this utility model:
[0006] An electronic controller mounting structure includes a left limiting part, a right limiting part, an upper limiting part, a lower limiting part and a front limiting part located inside a motor housing. A motor rear cover is detachably connected to the rear end of the motor housing, and a rear pressing part is provided on the motor rear cover.
[0007] The electronic controller can be installed by inserting it into the rear end of the motor housing. After installation, the left and right limiting parts limit the left and right directions of the electronic controller, the upper and lower limiting parts limit the up and down directions of the electronic controller, the front limiting part supports the front side of the electronic controller, and the rear pressing part presses the rear side of the electronic controller.
[0008] Furthermore, the electronic controller includes a housing, with mounting edges extending from both the left and right ends of the housing. The left and right ends of the housing are respectively limited by the left limiting part and the right limiting part. The upper end of the mounting edge of the housing is limited by the upper limiting part, and the lower end of the housing is limited by the lower limiting part. The front end of the housing is supported by the front limiting part, and the rear end of the housing is pressed by the rear pressing part.
[0009] Another aspect of this utility model provides an electric motor, including the electronic controller mounting structure as described in any of the above.
[0010] Furthermore, the motor housing includes an electrical control cavity and a motor cavity arranged vertically, the electrical control cavity being used to house the electrical controller, and the motor cavity being used to house the stator and rotor.
[0011] Furthermore, a wind baffle ring is fixedly connected to the front side of the stator, and a fan blade is connected to the rotor shaft in front of the wind baffle ring as it rotates; air inlets are provided on the front and left and right sides of the electrical control cavity, the rear side of the electrical control cavity is connected to the rear side of the motor cavity, and an air outlet is provided in the motor cavity in front of the fan blade in the axial direction and / or on the radial outer side.
[0012] Furthermore, the motor also includes a gearbox, which is installed on the front side of the motor housing; the front end of the rotating shaft extends into the gearbox, and the gearbox is provided with a gear set and an output shaft. The input end of the gear set is connected to the rotating shaft, and the output end of the gear set is connected to the output shaft. The output shaft extends out of the gearbox.
[0013] Furthermore, the motor also includes an intermediate cover, the front side of the motor cavity is an opening, one side of the intermediate cover is connected to the motor housing and covers the opening on the front side of the motor cavity, and the other side of the intermediate cover is sealed to install the gearbox; an air outlet is formed on the intermediate cover on the outside of the gearbox.
[0014] Furthermore, a first positioning structure is provided between the intermediate cover and the motor housing, and a second positioning structure is provided between the intermediate cover and the gearbox; the first positioning structure includes a plurality of positioning walls provided on the intermediate cover and positioning surfaces provided on the motor housing, and positioning is performed by the positioning walls and positioning surfaces; the second positioning structure includes a plurality of positioning pins provided on the intermediate cover and positioning holes provided on the gearbox, and positioning is performed by the positioning pins and positioning holes.
[0015] Furthermore, the rotating shaft is provided with a drive gear, one side of which is limited and the other side is locked by a fastener located at the front end of the rotating shaft. The fastener is a concave-convex anti-loosening nut.
[0016] Furthermore, a mounting flange is connected to the front side of the gearbox, and a mounting base plate is connected to the bottom of the gearbox and the motor housing; the motor housing is made of plastic, while the intermediate cover and the gearbox are made of metal.
[0017] After adopting the above technical solution, the electric controller installation structure and motor provided by this utility model have the following beneficial effects compared with the prior art: Compared with the prior art, the installation structure provided in this embodiment allows the electric controller to be horizontally inserted into the rear end of the motor housing along its length direction for installation. The electric controller is limited in the left, right, up, down and front end by multiple limiting parts on the motor housing, and then the rear end of the electric controller is pressed by the pressing part on the rear cover of the motor, thereby realizing the installation and fixation of the electric controller. This installation structure can realize installation in various scenarios without changing the structure of the existing electric controller, and is low in cost and easy to install. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of the electronic controller of this utility model;
[0019] Figure 2 This is a structural schematic diagram of the motor housing of this utility model from a first-view perspective.
[0020] Figure 3 This is a schematic diagram of the structure of the motor rear cover of this utility model;
[0021] Figure 4 This is a schematic diagram of the structure of the present invention, showing the electronic controller being placed inside the motor housing;
[0022] Figure 5 This is a schematic diagram of the structure of the motor rear cover connected to the motor housing according to this utility model;
[0023] Figure 6 This is a schematic diagram of the structure of the motor of this utility model;
[0024] Figure 7 This is a cross-sectional view of the motor of this utility model;
[0025] Figure 8 This is a structural schematic diagram of the motor housing of this utility model from a second perspective.
[0026] Figure 9 This is a structural schematic diagram of the middle cover of this utility model from a first-view perspective;
[0027] Figure 10 This is a structural schematic diagram of the middle cover of this utility model from a second perspective;
[0028] Figure 11This is a schematic diagram of the gearbox structure of this utility model.
[0029] in,
[0030] 1. Electrical controller, housing 11, mounting edge 111, mounting hole 112, circuit board 12; 2. Motor housing 2, electrical controller mounting port 21, electrical control cavity 22, left limiting part 221, right limiting part 222, upper limiting part 223, lower limiting part 224, front limiting part 225, opening 23, motor cavity 24, air inlet 25, air outlet 26, positioning surface 27; 3. Motor rear cover 3, rear pressing part 31, annular pressure plate 32, sealing ring 33; 4. Stator 4, wind baffle ring 41; 5. Rotor 5, rotating shaft 51, fan blade 52, bearing 53, fastener 54, blocking part 55; 6. Gearbox 6, gear set 61, drive gear 611, output shaft 62, positioning hole 63; 7. Intermediate cover 7, positioning wall 71, positioning pin 72, sealing gasket 73; 8. Mounting flange; 9. Mounting base plate. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0033] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.
[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0035] like Figure 1-5 As shown, this embodiment provides an electronic controller mounting structure for integrating an electronic controller 1 into a motor. Specifically, the motor includes a motor housing 2 and a motor rear cover 3. The rear end of the motor housing 2 is provided with an electronic controller mounting port 21, through which the electronic controller 1 can be inserted for installation. The rear end of the motor housing 2 and the motor rear cover 3 are detachably connected by means of screws or other methods.
[0036] Furthermore, the mounting structure includes a left limiting part 221, a right limiting part 222, an upper limiting part 223, a lower limiting part 224, a front limiting part 225 located inside the motor housing 2, and a rear pressing part 31 located on the motor rear cover 3.
[0037] The electronic controller 1 can be horizontally inserted into the electronic controller mounting port 21 at the rear end of the motor housing 2, and then the motor rear cover 3 is closed for installation. After installation, the left limiting part 221 and the right limiting part 222 on the motor housing 2 limit the left and right directions of the electronic controller 1, the upper limiting part 223 and the lower limiting part 224 limit the up and down directions of the electronic controller 1, the front limiting part 225 supports the front of the electronic controller 1, and the rear pressing part 31 on the motor rear cover 3 presses the rear of the electronic controller 1.
[0038] Thus, the installation structure provided in this embodiment, compared with the prior art, allows the electronic controller 1 to be horizontally inserted into the rear end of the motor housing 2 along its length direction for installation. Multiple limiting parts on the motor housing 2 limit the electronic controller 1 to the left, right, up, down, and front end. Then, the pressing part on the rear cover 3 of the motor presses the rear end of the electronic controller 1, thereby achieving the installation and fixation of the electronic controller 1. This installation structure can realize installation in various scenarios without changing the structure of the existing electronic controller 1, which is low in cost and very convenient to install.
[0039] like Figure 1 As shown, the electronic controller 1 in this embodiment includes a housing 11 and a circuit board 12 fixed inside the housing 11. Components are mounted on the circuit board 12. Mounting edges 111 extend from both ends of the housing 11 of the electronic controller 1, and mounting holes 112 are provided on the mounting edges 111. Traditionally, the electronic controller 1 is mounted on the target device by inserting screws into these mounting holes 112. However, in… Figure 2 The installation scenario shown makes it difficult to tighten the screws.
[0040] like Figure 2 , 4 As shown, in this embodiment, the left and right ends of the housing 11 of the electronic controller 1 are respectively limited by the left limiting part 221 and the right limiting part 222, which are protruding ribs formed inside the motor housing 2; the upper end of the mounting edge 111 of the housing 11 of the electronic controller 1 is limited by the upper limiting part 223, and the lower end of the housing 11 of the electronic controller 1 is limited by the lower limiting part 224. The upper limiting part 223 and the lower limiting part 224 are also... The protruding rib formed inside the motor housing 2 is used in this embodiment to limit the housing 11 of the electronic controller 1, increasing the limiting area and improving the limiting effect. The front end of the housing 11 of the electronic controller 1 is supported by the front limiting part 225, and the rear end of the housing 11 of the electronic controller 1 is pressed by the rear pressing part 31. The front limiting part 225 is the front end face or protruding rib inside the motor housing 2, and the rear pressing part 31 is the protruding rib / plate formed on the rear cover 3 of the motor. In this way, the housing 11 of the electronic controller 1 is limited without affecting the circuit board 12 and its components.
[0041] like Figure 5-11 As shown, this embodiment also provides a motor, which includes the mounting structure described above for mounting the electronic controller 1. Specifically, the motor housing 2 of this embodiment includes an electronic control cavity 22 and a motor cavity 24 arranged vertically. The electronic control cavity 22 is located above the motor cavity 24. The electronic control cavity 22 is used to house the electronic controller 1, while the motor cavity 24 is used to house the stator 4, rotor 5, and other main motor components. In the prior art, the electronic controller 1 is generally installed on the rear side of the motor body, resulting in a very long overall product size. This embodiment uses two vertically arranged cavities to house the electronic controller 1 and the motor body, which is a reasonable layout and compact structure, reducing the overall size and volume of the motor and facilitating its installation and transportation.
[0042] like Figure 7 , 9 In this embodiment, a fan blade 52 is also connected to the rotating shaft 51 of the rotor 5 as it rotates. Only its frame is shown in the figure. The shape and structure of the fan blade 52 can be set as needed, for example, it can be set as a combination of axial and centrifugal fan blades; thus forming an air-cooled motor. When the rotating shaft 51 rotates, the fan blade 52 also rotates, and external cold air can flow through the motor for cooling. Figure 7 , 8 In this embodiment, a wind deflector ring 41 is also fixedly connected to the front side of the stator 4. Specifically, the wind deflector ring 41 is located on the rear side of the fan blade 52. The wind deflector ring 41 is roughly annular and can be fixedly connected to the motor housing 2 by screws. The wind deflector ring 41 forms a blockage on the outer ring, and the airflow moves forward from the inner ring of the middle part of the wind deflector ring 41 to the fan blade 52.
[0043] like Figure 6As shown, in this embodiment, air inlets 25 are provided on the front and left and right sides of the electronic control cavity 22. The air inlet 25 on the front side of the electronic control cavity 22 can be configured as a brim type, a concealed air window type, or other structures. The housing 11 on the left and right sides of the electronic control cavity 22 is preferably configured as an arc shape, so that the air inlets 25 on the left and right sides of the electronic control cavity 22 are closer to the components on the electronic controller 1. Further, as Figure 7 In this embodiment, the partition between the electrical control cavity 22 and the motor cavity 24 is not tightly fitted to the motor rear cover 3, thereby allowing the rear side of the electrical control cavity 22 to communicate with the rear side of the motor cavity 24, enabling airflow to pass through and also serving as a space for lead wire connection. Further, as... Figure 7 Airflow channels are also formed between the stator 4 and the inner wall of the motor housing 2, and between the stator 4 and the rotor 5. Furthermore, as... Figure 6 , 7 An air outlet 26 is provided inside the motor cavity 24 on the axial front side and / or radial outer side of the fan blade 52.
[0044] When the motor shaft 51 rotates, cool air enters the electrical control cavity 22 from the front and left and right sides, passes through the electrical controller 1, and then flows from the rear of the electrical control cavity 22 into the motor cavity 24. It then flows through the flow channels between the stator 4 and the motor housing 2, and between the rotor 5 and the stator 4, to the wind deflector 41. After passing through the fan blades 52, it exits from the air outlet 26 on the axial front side and / or radial outer side of the motor cavity 24. The entire air duct passes through the electrical controller 1 and the motor body, effectively carrying away heat from the components and improving the overall heat dissipation effect.
[0045] The motor in this embodiment also includes a gearbox 6, which is mounted on the front side of the motor housing 2. The front end of the rotating shaft 51 extends into the gearbox 6. The gearbox 6 contains a gear set 61 and an output shaft 62. The input end of the gear set 61 is connected to the rotating shaft 51, and the output end of the gear set 61 is connected to the output shaft 62. The output shaft 62 extends out of the gearbox 6 and can be connected to an external tool via a key to transmit power. Thus, the motor in this embodiment is formed as an integrated motor including a motor body, an electronic controller 1, and a transmission mechanism.
[0046] Furthermore, such as Figure 7-11 The motor in this embodiment also includes an intermediate cover 7, through which the gearbox 6 is mounted. Specifically, the front side of the motor cavity 24 is an opening 23. One side of the intermediate cover 7 is connected to the motor housing 2 and covers the opening 23 on the front side of the motor cavity 24. The other side of the intermediate cover 7 is sealed with a sealing gasket 73 to mount the gearbox 6. Figure 6 An air outlet 26 is formed on the lower outer side of the gearbox 6 on the middle cover 7, so as to cool the gearbox 6; the air outlet 26 can be, but is not limited to, a dark window design.
[0047] Furthermore, in this embodiment, a first positioning structure is provided between the intermediate cover 7 and the motor housing 2. The first positioning structure includes a plurality of positioning walls 71 disposed on the intermediate cover 7 and positioning surfaces 27 disposed on the motor housing 2, such as... Figure 9 As shown, it includes eight circumferentially distributed protrusions, the outer walls of which form positioning walls 71, as... Figure 8 As shown, the front inner wall of the motor housing 2 is formed as the positioning surface 27. Positioning is achieved through the positioning wall 71 and the positioning surface 27, which facilitates installation. Moreover, during installation, the rotor 5 can be pre-connected to the intermediate cover 7 and the stator 4 can be pre-connected to the motor housing 2. When installing the intermediate cover 7 and the motor housing 2, the first positioning structure can ensure the concentricity of the stator 4 and the rotor 5.
[0048] Furthermore, in this embodiment, a second positioning structure is provided between the intermediate cover 7 and the gearbox 6. The second positioning structure includes a plurality of positioning pins 72 disposed on the intermediate cover 7 and positioning holes 63 disposed on the gearbox 6, such as... Figure 10-11 As shown, it includes two locating pins 72 and two locating holes 63. The locating pins 72 and locating holes 63 are used for positioning, which facilitates installation and ensures the concentricity of the gear set 61 during installation.
[0049] In this embodiment, the rotor 5 can be pre-installed on the intermediate cover 7. A drive gear 611 is provided on the shaft 51, which is the first-stage input gear in the gear set 61. One side of the drive gear 611 is limited by a bearing 53 on the intermediate cover 7, and the other side is locked by a fastener 54 located at the front end of the shaft 51. The fastener 54 is a convex-concave anti-loosening nut, preferably a hard-lock nut. This installation method makes installation more convenient; moreover, traditional locking methods use only a single ordinary nut, which can lock when the motor rotates forward, but may loosen when the motor rotates in reverse. This embodiment uses a convex-concave anti-loosening nut to ensure effective locking in both forward and reverse rotation of the motor.
[0050] In this embodiment, the rear end of the rotating shaft 51 is also provided with a bent blocking member 55 to form a labyrinth structure to prevent dust and impurities from entering the rear end of the rotating shaft 51 and affecting its rotation. Similarly, in this embodiment, an annular pressure plate 32 is provided on the motor rear cover 3. The annular pressure plate 32 is pressed against the motor housing 2 of the rear bearing 53 of the rotating shaft 51 by a sealing ring 33, which can also prevent dust and impurities from entering from the rear end and affecting the rotation of the rotating shaft 51.
[0051] In this embodiment, a mounting flange 8 is also connected to the front side of the gearbox 6, and a mounting base plate 9 is also connected to the bottom of the gearbox 6 and the motor housing 2. Depending on the specific scenario, the gearbox 6 can be mounted on the target equipment via the mounting flange 8 or the mounting base plate 9. The motor housing 2 and the motor rear cover 3 are preferably made of plastic to improve pressure resistance, while the intermediate cover 7 and the gearbox 6 are preferably made of metal to improve strength.
[0052] During assembly, the rotor 5 is connected to the intermediate cover 7, and the rotor shaft 51 passes through the bearing 53 on the intermediate cover 7. Then, a drive gear 611 is assembled at the front end of the shaft 51, and a locking nut is fitted to secure it, forming one assembly. The stator 4 and the windshield ring 41 are fixedly connected to the motor cavity 24 of the motor housing 11, forming another assembly. Next, these two assemblies are connected, i.e., one side of the intermediate cover 7 is connected to the motor housing 2, allowing the rotor 5 to extend into the stator 4. Then, the electronic controller 1 is installed into the electronic control cavity 22, the leads are configured, and the motor rear cover 3 is closed and secured. Next, the gearbox 6 with the gear set 61 is installed on the other side of the intermediate cover 7. Finally, the mounting flange 8 and the mounting base plate 9 are connected.
[0053] As can be seen from the above, the electric controller mounting structure and motor provided in this embodiment facilitate the convenient installation of the electric controller in various scenarios, and the motor has a compact structure, reasonable layout, and is small and simple.
[0054] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. An electric control device mounting structure characterized by comprising: The mounting structure includes a left limiting part (221), a right limiting part (222), an upper limiting part (223), a lower limiting part (224) and a front limiting part (225) located inside the motor housing (2). The rear end of the motor housing (2) is detachably connected to a motor rear cover (3), and the motor rear cover (3) is provided with a rear pressing part (31). The electric controller (1) can be installed from the rear end of the motor housing (2). After installation, the left limiting part (221) and the right limiting part (222) limit the electric controller (1) in the left and right directions. The upper limiting part (223) and the lower limiting part (224) limit the electric controller (1) in the up and down directions. The front limiting part (225) supports the front side of the electric controller (1). The rear pressing part (31) presses the rear side of the electric controller (1).
2. The electric control device mounting structure according to claim 1, wherein The electronic controller (1) includes a housing (11). The left and right ends of the housing (11) of the electronic controller (1) have mounting edges (111). The left and right ends of the housing (11) of the electronic controller (1) are respectively limited by the left limiting part (221) and the right limiting part (222). The upper end of the mounting edge (111) of the housing (11) of the electronic controller (1) is limited by the upper limiting part (223). The lower end of the housing (11) of the electronic controller (1) is limited by the lower limiting part (224). The front end of the housing (11) of the electronic controller (1) is supported by the front limiting part (225). The rear end of the housing (11) of the electronic controller (1) is pressed by the rear pressing part (31).
3. An electric machine characterized by Includes the electronic controller mounting structure as described in any one of claims 1-2.
4. The electric machine of claim 3, wherein, The motor housing (2) includes an electrical control cavity (22) and a motor cavity (24) arranged vertically. The electrical control cavity (22) is used to house the electrical controller (1), and the motor cavity (24) is used to house the stator (4) and the rotor (5).
5. The electric machine of claim 4, wherein, A windshield ring (41) is fixedly connected to the front side of the stator (4), and a fan blade (52) is connected to the rotor (5) on the shaft (51) in front of the windshield ring (41). An air inlet (25) is provided on the front and left and right sides of the electrical control cavity (22). The rear side of the electrical control cavity (22) is connected to the rear side of the motor cavity (24). An air outlet (26) is provided in the motor cavity (24) on the axial front side and / or radial outer side of the fan blade (52).
6. The electric machine of claim 5, wherein, The motor also includes a gearbox (6), which is installed on the front side of the motor housing (2); the front end of the rotating shaft (51) extends into the gearbox (6), and the gearbox (6) is provided with a gear set (61) and an output shaft (62). The input end of the gear set (61) is connected to the rotating shaft (51), and the output end of the gear set (61) is connected to the output shaft (62). The output shaft (62) extends out of the gearbox (6).
7. The electric machine of claim 6, wherein, The motor also includes an intermediate cover (7), the front side of the motor cavity (24) is an opening (23), one side of the intermediate cover (7) is connected to the motor housing (2) and covers the opening (23) on the front side of the motor cavity (24), and the gearbox (6) is sealed on the other side of the intermediate cover (7); an air outlet (26) is formed on the intermediate cover (7) on the outside of the gearbox (6).
8. The electric machine of claim 7, wherein, A first positioning structure is provided between the intermediate cover (7) and the motor housing (2), and a second positioning structure is provided between the intermediate cover (7) and the gearbox (6). The first positioning structure includes a plurality of positioning walls (71) provided on the intermediate cover (7) and a positioning surface (27) provided on the motor housing (2), and positioning is performed by the positioning walls (71) and the positioning surface (27). The second positioning structure includes a plurality of positioning pins (72) provided on the intermediate cover (7) and a positioning hole (63) provided on the gearbox (6), and positioning is performed by the positioning pins (72) and the positioning hole (63).
9. The electric machine of claim 7, wherein, The rotating shaft (51) is provided with a drive gear (611). One side of the drive gear (611) is limited, and the other side is locked by a fastener (54) located at the front end of the rotating shaft (51). The fastener (54) is a concave-convex anti-loosening nut.
10. The electric machine of claim 7, wherein, The front side of the gearbox (6) is also connected to a mounting flange (8), and the bottom of the gearbox (6) and the motor housing (2) are also connected to a mounting base plate (9); the motor housing (2) is made of plastic, and the middle cover (7) and the gearbox (6) are made of metal.