Waterproof plastic-sealed stator assembly and motor

Abstract

The utility model discloses a waterproof plastic package stator subassembly, include: stator, the injection molding body of plastic package in the outside of stator, the end surface of injection molding body has annular groove body, end cover, the end cover has annular connecting portion, and end cover is connected with injection molding body, and makes the part of annular connecting portion insert in annular groove body, the outer edge of injection molding body and annular connecting portion form the sealed flow path of water flow. A kind of motor, including rotor assembly and the waterproof plastic package stator subassembly as described above. The utility model waterproof plastic package stator subassembly and motor, form waterproof structure by end cover and injection molding body, avoid water vapor from the connecting portion of end cover and injection molding body into inside, with good sealing property and waterproof effect.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a waterproof plastic-encapsulated stator assembly and a motor. Background Technology

[0002] Permanent magnet brushless DC motors are increasingly widely used due to their high efficiency and energy saving, replacing traditional AC induction motors in various household appliances.

[0003] A permanent magnet brushless DC motor mainly consists of components such as a stator assembly, rotor assembly, end covers, power line assembly, and insulation system. For example... Figure 6 As shown, the stator assembly is mainly composed of a stator core, enameled wire, pins, small end caps, and BMC molding compound. Traditional end cap and stator assembly have radial assembly clearances in their fit. When the motor is vertically mounted in an air conditioner, water accumulated on the side walls can easily seep into the motor through these radial clearances under gravity, affecting normal operation. Adding additional sealing rings or sealant would increase manufacturing costs and reduce production efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the problem of poor waterproof effect of plastic-encapsulated stators in the prior art, this utility model provides a waterproof plastic-encapsulated stator assembly and motor, which forms a waterproof structure through end caps and injection molded body, preventing water vapor from entering the interior from the connection between the end caps and injection molded body, and has good sealing and waterproof effect.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a waterproof plastic-encapsulated stator assembly, comprising: a stator; an injection-molded body encapsulating the outside of the stator, wherein the end face of the injection-molded body has an annular groove; an end cap, wherein the end cap has an annular connecting portion, the end cap is connected to the injection-molded body, and a portion of the annular connecting portion is inserted into the annular groove, wherein the outer edge of the injection-molded body and the annular connecting portion form a sealed flow path for water supply.

[0006] This utility model relates to a waterproof plastic-sealed stator assembly, which has an annular groove on the injection-molded body and an annular connecting part of the end cap to form an annular waterproof sealing structure. This allows water to flow downward along the injection-molded body and end cap under the action of gravity, preventing water from entering the interior of the injection-molded body.

[0007] Furthermore, the injection-molded body has an outer stop and an inner stop, and the annular groove is a U-shaped groove located between the outer stop and the inner stop and arranged circumferentially.

[0008] Furthermore, to optimize the sealing structure, the annular connecting portion includes: The plug-in end extends axially and is inserted into the annular groove, and closely abuts the inner and outer surfaces of the inner and outer stops to form a sealing area. The connecting end is provided along the outer side of the inner stop and together with the insertion end covers the inner stop.

[0009] Furthermore, in order to allow water to flow smoothly, the connecting end has a guide section that protrudes axially from the outer stop, and the outer surface of the outer stop, the sealing area and the guide section form a sealed guide path for water flow.

[0010] Furthermore, to ensure a waterproof effect, the axial height of the outer stop is less than or equal to the axial height of the inner stop.

[0011] Furthermore, to further optimize the waterproofing effect, the axial height of the outer stop is more than 10% of the axial height of the inner stop.

[0012] Furthermore, the radial thickness of the outer stop is less than or equal to the radial thickness of the inner stop.

[0013] Furthermore, for added waterproofing, the outer stop is covered with waterproof tape.

[0014] Furthermore, the waterproof tape protrudes axially from the injection molded body.

[0015] The technical solution adopted by this utility model to solve its technical problem is: an electric motor, including a rotor assembly and the above-mentioned encapsulated stator assembly.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. The waterproof encapsulated stator assembly and motor of this utility model are connected by an annular connecting part and an annular groove, and a U-shaped covering and sealing structure is formed between the end cover and the injection molded body. This allows water to flow downward along the injection molded body and the end cover under the action of gravity, preventing water from entering the injection molded body and achieving a waterproof sealing effect.

[0017] 2. The waterproof encapsulated stator assembly and motor of this utility model are integrally injection molded with a waterproof structure, resulting in lower production costs and ensuring a tight fit between the end cap and the injection molded body, thus providing better waterproof sealing performance. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of the waterproof plastic-encapsulated stator assembly of this utility model; Figure 2 for Figure 1 A partial schematic diagram; Figure 3 A three-dimensional structural diagram of a waterproof plastic-encapsulated stator assembly; Figure 4This is a schematic diagram of the three-dimensional structure of the injection molded part; Figure 5 This is a schematic diagram of the structure of the plastic-encapsulated stator assembly in Embodiment 2; Figure 6 This is a schematic diagram of the structure of an existing plastic-encapsulated stator assembly.

[0020] In the picture: 1. Stator; 2. Injection molded body; 21. Annular groove; 22. External stop; 23. Internal stop; 3. End cap; 31. Annular connecting part; 311. Insertion end; 312. Connecting end; 3121. Guide section; 4. Waterproof tape. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0024] Example 1, as Figures 1 to 4As shown, a waterproof encapsulated stator assembly includes: a stator 1, an injection-molded body 2 encapsulated on the outside of the stator 1, and an end cap 3 (since the encapsulated stator assembly in this embodiment is used on a vertically mounted motor with the rotor shaft facing upwards, the end cap 3 faces downwards during use; here, the end cap 3 can be understood as the lower end cap). The injection-molded body 2 and the stator 1 are integrally formed by injection molding. The stator 1 has a conventional structure and is not directly related to the concept of this embodiment, so it will not be described in detail here.

[0025] Specifically, the injection molded body 2 has an annular groove 21 on its end face. The end cap 3 has an annular connecting portion 31. The end cap 3 is assembled with the injection molded body 2 such that a portion of the annular connecting portion 31 is inserted into the annular groove 21, and the outer edge of the injection molded body 2 and the annular connecting portion 31 form a sealed flow path for water supply.

[0026] Specifically, the injection molded body 2 has an outer stop 22 and an inner stop 23, and the annular groove 21 is a U-shaped groove located between the outer stop 22 and the inner stop 23 and arranged circumferentially.

[0027] Specifically, the annular connecting portion 31 includes a plug-in end 311 and a connecting end 312. The plug-in end 311 extends axially and inserts into the annular groove 21, closely abutting the inner surfaces of the inner stop 23 and the outer stop 22 to form a sealing area. The connecting end 312 is positioned along the outer surface of the inner stop 23 and, together with the plug-in end 311, covers the inner stop 23. By sealing the annular groove 21 with the plug-in end 311, the annular groove 21 is sealed, making it difficult for water to enter the annular groove 21 under gravity when the end cap 3 is used facing downwards. The connecting end 312 forms a wrapping structure around the inner stop 23, further preventing water from entering the injection molded body 2 and improving the connection stability between the injection molded body 2 and the end cap 3.

[0028] Preferably, the axial height of the outer stop 22 is equal to the axial height of the inner stop 23, so as to ensure that the water flow can flow downward along the connection. At the same time, the radial thickness of the outer stop 22 is less than or equal to the radial thickness of the inner stop 23.

[0029] Specifically, the connecting end 312 has a guide section 3121 that protrudes axially from the outer stop 22, and the outer surface of the outer stop 22, the sealing area, and the guide section 3121 form a sealed guide path for water supply flow. For example... Figure 4 As shown, during use, water flows downward along the side wall of the outer stop 22. When the water flows to the connection area between the injection molded body 2 and the end cap 3, a sealing structure is formed between the insertion end 311 and the outer stop 22 and the inner stop 23. The water will not enter the U-shaped groove, but will continue to flow downward along the guide section 3121. Finally, the water drips down along the connection end 312, which can effectively prevent water from entering the interior of the injection molded body 2.

[0030] In Embodiment 2, the difference from Embodiment 1 is that the axial height of the outer stop 22 is less than the axial height of the inner stop 23. Preferably, the axial height of the outer stop 22 is more than 10% of the axial height of the inner stop 23. In this case, the height of the outer stop 22 can cover the plug end 311, which not only meets the waterproof requirements but also saves materials and reduces costs.

[0031] Example 3, based on Examples 1 and 2, as follows: Figure 5 As shown, the outer stop 22 is covered with waterproof tape 4. The waterproof tape 4 can further prevent water from adhering to the injection molded body 2. Preferably, the waterproof tape 4 protrudes from the outer stop 22 in the axial direction, effectively preventing water from flowing into the sealing structure.

[0032] In summary, the waterproof encapsulated stator assembly and motor of this utility model form a waterproof structure through the end cap and injection molded body, preventing moisture from entering the interior from the connection between the end cap and the injection molded body, thus exhibiting good sealing and waterproofing effects.

[0033] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A water resistant, plastic encapsulated stator assembly, characterized by, include: Stator (1); An injection molded body (2) is coated on the outside of the stator (1), and the end face of the injection molded body (2) has an annular groove (21). End cap (3), the end cap (3) has an annular connecting part (31), the end cap (3) is connected to the injection molded body (2), and a portion of the annular connecting part (31) is inserted into the annular groove (21), the outer edge of the injection molded body (2) and the annular connecting part (31) form a sealed flow path for water supply.

2. The water-resistant plastic potted stator assembly of claim 1, wherein, The injection molded body (2) has an outer stop (22) and an inner stop (23), and the annular groove (21) is a U-shaped groove located between the outer stop (22) and the inner stop (23) and arranged circumferentially.

3. The water-resistant plastic potted stator assembly of claim 2, wherein, The annular connecting portion (31) includes: The plug end (311) extends axially and is inserted into the annular groove (21), and closely abuts the inner side of the inner stop (23) and the outer stop (22) to form a sealing area; The connecting end (312) is provided along the outer side of the inner stop (23) and together with the plug end (311) covers the inner stop (23).

4. The waterproof encapsulated stator assembly according to claim 3, characterized in that, The connecting end (312) has a guide section (3121) that protrudes axially from the outer stop (22), and the outer surface of the outer stop (22), the sealing area and the guide section (3121) form a sealed guide path for water supply flow.

5. The waterproof encapsulated stator assembly according to claim 2, characterized in that, The axial height of the outer stop (22) is less than or equal to the axial height of the inner stop (23).

6. The water-resistant plastic potted stator assembly of claim 5, wherein, The axial height of the outer stop (22) is more than 10% of the axial height of the inner stop (23).

7. The waterproof encapsulated stator assembly according to claim 2, characterized in that, The radial thickness of the outer stop (22) is less than or equal to the radial thickness of the inner stop (23).

8. The waterproof encapsulated stator assembly according to claim 2, characterized in that, The outer stop (22) is covered with waterproof tape (4).

9. The water-resistant plastic potted stator assembly of claim 8, wherein, The waterproof tape (4) protrudes axially from the injection molded body (2).

10. An electric machine characterized by Includes a rotor assembly and a waterproof, encapsulated stator assembly as described in any one of claims 1-9.

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