electric machine

Abstract

The utility model provides a kind of motor, it is related to the technical field of motor, the utility model provides motor includes: casing, stator and plug connector, the casing is provided with first cavity, the stator is fixedly connected in the first cavity;Assembly hole is provided on the lateral wall of the first cavity;One end of the plug connector passes through the assembly hole and is located in the first cavity;Limiting insert is correspondingly provided on the first cavity and plug connector, the limiting insert is used to prevent the plug connector from moving along transverse direction;The plug connector is located between the bottom surface of the first cavity and stator, so that the plug connector is limited in vertical direction.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor. Background Technology

[0002] In current brushless motor manufacturing, the assembly process is often quite complex, typically requiring a large number of screws and other connectors to secure the various components. This not only increases assembly time and cost, but also carries the risk of screw connections loosening, affecting the motor's stability and reliability. Utility Model Content

[0003] The purpose of this invention is to provide a motor that alleviates the technical problem of excessive screws used in the assembly of existing motors.

[0004] The motor provided by this utility model includes: a housing, a stator, and a connector, wherein the housing is provided with a first cavity, and the stator is fixedly connected to the first cavity; The first cavity has an assembly hole on its side wall; one end of the connector passes through the assembly hole and is located inside the first cavity; The first cavity and the connector are respectively provided with limit plugs, which are used to prevent the connector from moving laterally; The connector is located between the bottom surface of the first cavity and the stator, so that the connector is vertically limited.

[0005] Furthermore, the limiting plug includes a limiting post disposed on the bottom surface of the first cavity; The limiting plug includes a limiting hole provided on the connector, and the limiting post is inserted into the limiting hole.

[0006] Furthermore, there are multiple limiting posts and limiting holes, and they correspond one-to-one.

[0007] Furthermore, the plurality of limiting posts and limiting holes are arranged sequentially along the orientation of the assembly hole.

[0008] Furthermore, the stator is interference-fitted with the first cavity.

[0009] Furthermore, a motor shaft integrally formed with the housing is provided on the bottom surface of the first cavity; The motor also includes a rotor, which is rotatably connected to the motor shaft.

[0010] Furthermore, the motor also includes a retaining ring, and the motor shaft is provided with a slot, the retaining ring engaging with the slot; The rotor is located below the retaining ring, which is used to prevent the rotor from detaching from the motor shaft.

[0011] Furthermore, a bearing is provided between the rotor and the motor shaft.

[0012] Furthermore, the rotor includes an integrally formed connecting part, a bearing connector, a permanent magnet, and a functional part; The connecting part is provided with a shaft hole, and the bearing connector is embedded in the shaft hole; The permanent magnet is embedded in the side wall of the connecting part; The connecting part and the functional part are injection molded together using the same material.

[0013] Furthermore, the functional part includes blades.

[0014] This utility model has at least the following advantages or beneficial effects: The motor provided by this utility model includes: a housing, a stator, and a connector. The housing has a first cavity, and the stator is fixedly connected to the first cavity. An assembly hole is provided on the side wall of the first cavity. One end of the connector passes through the assembly hole and is located in the first cavity. Limiting plugs are correspondingly provided on the first cavity and the connector, and the limiting plugs are used to prevent the connector from moving laterally. The connector is located between the bottom surface of the first cavity and the stator so that the connector is limited in the vertical direction.

[0015] During motor assembly, the connector is first connected to the housing via a limiting insert. The limiting insert prevents the connector from detaching laterally from the housing. Then, the stator is assembled to the housing. After assembly, the stator is positioned above the connector, vertically constrained between the bottom surface of the first cavity and the stator, thus completing the connection between the connector and the housing. This eliminates the need for screws, reducing the use of screws and other connecting parts, simplifying the assembly process, and improving production efficiency. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a motor provided in an embodiment of this utility model (functional parts are not shown). Figure 2 A schematic diagram showing the connection between the motor housing and the connector provided in an embodiment of this utility model; Figure 3A schematic diagram of the motor provided in an embodiment of this utility model from another perspective (functional parts are not shown). Figure 4 A cross-sectional view of the motor provided in an embodiment of this utility model (functional parts are not shown). Figure 5 This is a schematic diagram of the rotor of the motor provided in an embodiment of the present invention.

[0018] Icons: 1-Casing; 11-First cavity; 12-Assembly hole; 13-Limiting post; 2-Stator; 3-Motor shaft; 31-Retaining ring; 32-Bearing; 4-Connector; 41-Limiting hole; 51-Connecting part; 52-Bearing connector; 53-Permanent magnet; 54-Functional part. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figures 1-5 As shown, the motor provided by this utility model includes: a housing 1, a stator 2, and a connector 4. The housing 1 is used to house the stator 2 and rotor of the motor, as well as the control circuit board.

[0026] like Figure 2 and Figure 3 As shown, the housing 1 has a first cavity 11, and the stator 2 is fixedly connected inside the first cavity 11. An assembly hole 12 is provided on the side wall of the first cavity 11. One end of the connector 4 passes through the assembly hole 12 and is located inside the first cavity 11. The other end protrudes outside the housing 1, and the connector 4 can be plugged into one end of a charging cable.

[0027] like Figure 2 and Figure 4 As shown, limiting plugs are correspondingly provided on the first cavity 11 and the connector 4. Each limiting plug includes a limiting post 13 disposed on the bottom surface of the first cavity 11 and a limiting hole 41 disposed on the connector 4, with the limiting post 13 inserted into the limiting hole 41. The limiting plugs are used to prevent the connector 4 from moving laterally. The connector 4 is located between the bottom surface of the first cavity 11 and the stator 2, so that the connector 4 is vertically limited.

[0028] During motor assembly, one end of the connector 4 is first inserted into the assembly hole 12, and then the connector 4 is moved downwards until the limiting hole 41 is inserted into the limiting post 13. The connector 4 is connected to the housing 1 via the limiting insert. Under the action of the limiting insert, the connector 4 cannot be laterally dislodged from the housing 1. Then, the stator 2 is assembled with the housing 1. After assembly, the stator 2 is positioned above the connector 4, and vertically constrained between the bottom surface of the first cavity 11 and the stator 2, thus completing the connection between the connector 4 and the housing 1. The connector 4 and housing 1 no longer require screws, reducing the use of screws and other connecting parts, simplifying the assembly process, and improving production efficiency.

[0029] The number of limiting posts 13 and limiting holes 41 are both multiple and correspond one-to-one. In this embodiment, the number of limiting posts 13 and limiting holes 41 are both two, and the two limiting posts 13 and limiting holes 41 are arranged sequentially along the orientation of the assembly hole 12, which improves the anti-insertion and extraction force.

[0030] The stator 2 is interference-fitted with the first cavity 11. During processing, the stator 2 can be assembled with the housing 1 using a conventional interference fit method. For example, the stator 2 can be cooled to reduce its volume, then assembled with the housing 1. After the stator 2's temperature rises, it returns to its original volume, thus completing the interference fit with the housing 1. By using an interference fit to connect the housing 1 and the stator 2, the pain point of prior art, which requires screws for fixing, is solved; faster automated assembly is achieved, while avoiding a series of potential risks associated with screw connections; production efficiency is improved, and raw material and processing costs are reduced.

[0031] The bottom surface of the first cavity 11 is provided with a motor shaft 3 integrally formed with the housing 1; the motor also includes a rotor, which is rotatably connected to the motor shaft 3.

[0032] The housing 1 is formed by injection molding. During the injection molding of the housing 1, the motor shaft 3 is placed into the mold, thus the housing 1 and the motor shaft 3 are integrally formed. This changes the motor shaft 3 from the original rotor part to the stator 2 part, and the motor shaft 3 and housing 1 are integrally formed. This solves the problem that during the subsequent assembly of the motor shaft 3 and the impeller, process holes must be opened on the center of the base plate, the cover plate, and the control circuit board, which makes it impossible to form an effective seal in the second chamber (used to accommodate the control circuit board), and the waterproof and dustproof rating cannot reach IP6K7 or higher.

[0033] like Figure 1 and Figure 2As shown, the motor also includes a retaining ring 31. A slot is provided on the motor shaft 3, and the retaining ring 31 engages with the slot, fixing the retaining ring 31 relative to the motor shaft 3. The rotor is located below the retaining ring 31. Along the axial direction of the motor shaft 3, the retaining ring 31 and the bottom surface of the first cavity 11 form a vertical limiting element. The retaining ring 31 prevents the rotor from detaching from the motor shaft 3, thereby ensuring stable rotor rotation.

[0034] like Figure 4 and Figure 5 As shown, in order to reduce friction, there is a bearing 32 between the rotor and the motor shaft 3, and the number of bearings 32 can be one, two or even more.

[0035] The rotor includes an integrally formed connecting part 51, a bearing connector 52, a permanent magnet 53, and a functional part 54; the connecting part 51 is provided with a shaft hole, and the bearing connector 52 is embedded in the shaft hole; the permanent magnet 53 is embedded in the side wall of the connecting part 51; the connecting part 51 and the functional part 54 are integrally injection molded from the same material.

[0036] Both the connecting part 51 and the functional part 54 can be plastic parts. During the injection molding of the rotor, the bearing connector 52 and the permanent magnet 53 are placed into the mold. After injection molding, the connecting part 51, the bearing connector 52, the permanent magnet 53, and the functional part 54 are integrally formed. The hollow hole of the bearing connector 52 connects to the outer ring of the bearing 32, and the inner ring of the bearing 32 connects to the motor shaft 3. The permanent magnet 53 is embedded in the outer wall of the connecting part 51.

[0037] like Figure 5 As shown, the functional unit 54 includes blades, which can generate airflow after the rotor rotates, thus enabling the motor to function as a fan.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 this utility model.

Claims

1. An electric motor, characterized in that, include: The machine housing (1), stator (2) and connector (4) are provided, wherein the machine housing (1) is provided with a first cavity (11) and the stator (2) is fixedly connected in the first cavity (11); An assembly hole (12) is provided on the side wall of the first cavity (11); one end of the plug (4) passes through the assembly hole (12) and is located inside the first cavity (11); Limiting plugs are provided on the first cavity (11) and the plug (4) respectively, and the limiting plugs are used to prevent the plug (4) from moving laterally; The connector (4) is located between the bottom surface of the first cavity (11) and the stator (2) so that the connector (4) is vertically limited.

2. The motor according to claim 1, characterized in that, The limiting plug includes a limiting post (13) disposed on the bottom surface of the first cavity (11). The limiting plug includes a limiting hole (41) provided on the plug (4), and the limiting post (13) is plugged into the limiting hole (41).

3. The motor according to claim 2, characterized in that, The number of the limiting post (13) and the limiting hole (41) are both multiple and correspond one-to-one.

4. The motor according to claim 3, characterized in that, The plurality of the limiting posts (13) and limiting holes (41) are arranged sequentially along the orientation of the assembly hole (12).

5. The motor according to claim 1, characterized in that, The stator (2) is interference-fitted with the first cavity (11).

6. The motor according to claim 5, characterized in that, The bottom surface of the first cavity (11) is provided with a motor shaft (3) integrally formed with the housing (1). The motor also includes a rotor, which is rotatably connected to the motor shaft (3).

7. The motor according to claim 6, characterized in that, The motor also includes a retaining ring (31), and a slot is provided on the motor shaft (3), and the retaining ring (31) is engaged with the slot; The rotor is located below the retaining ring (31), which is used to prevent the rotor from detaching from the motor shaft (3).

8. The motor according to claim 7, characterized in that, The rotor has a bearing (32) between it and the motor shaft (3).

9. The motor according to claim 8, characterized in that, The rotor includes an integrally formed connecting part (51), a bearing connector (52), a permanent magnet (53), and a functional part (54). The connecting part (51) is provided with a shaft hole, and the bearing connector (52) is embedded in the shaft hole; The permanent magnet (53) is embedded in the side wall of the connecting part (51); The connecting part (51) and the functional part (54) are integrally injection molded from the same material.

10. The motor according to claim 9, characterized in that, The functional part (54) includes blades.

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