Motor stator adopting integrated insulation framework

Abstract

The utility model relates to a motor stator adopting an integrated insulation framework, which comprises a winding and a stator core, a plurality of stator tooth parts are arranged on the stator core at equal intervals, the winding is formed by sequentially connecting a plurality of coils, each coil is wound on the corresponding stator tooth part, and the stator tooth parts are arranged on the stator core. The upper end and the lower end of the stator tooth part are respectively provided with an upper end injection molding framework and a lower end injection molding framework, two sides of the stator tooth part are also provided with groove lining paper, and the upper end and the lower end of the groove lining paper are respectively inserted into the upper end injection molding framework and the lower end injection molding framework. According to the utility model, the upper end part injection molding framework and the lower end part injection molding framework are respectively arranged above and below the stator tooth part of the stator core, and the slot lining paper on the side surface of the stator tooth part is fixed by the injection molding frameworks, so that the requirements of high lamination height and high slot fullness rate can be met; and meanwhile, the upper and lower end injection molding frameworks are integrally formed by injection molding by taking the iron core and the groove lining paper as inserts, so that the process is simpler, and the motor stator assembly production steps are simplified.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and in particular relates to a motor stator with an integrated insulating frame. Background Technology

[0002] A motor stator generally consists of a stator core and windings wound around the stator core. To ensure insulation between the stator core and the windings, insulation layers, insulating paper, insulating films, or insulating frames are typically installed between the windings and the stator core. Current motor stator insulation structures generally include the following:

[0003] 1. Two separate injection molded parts are used for each stator tooth of the stator core and then assembled to form an insulating frame. The above solution uses conventional engineering plastic with a relatively thick wall, which can only meet the requirements of low slot fill factor and low stack height.

[0004] 2. Use iron core as an insert for direct injection molding to form an insulating layer on the surface of the iron core. This solution also uses conventional engineering plastics with thicker wall thickness, which can only meet the requirements of low slot fill rate and low stack height. Using high-flow plastics such as PPS / LCP / PPA can achieve a relatively high slot fill rate, but it has high requirements for the incoming materials of the iron core insert and limits the maximum stack height.

[0005] 3. The insulation of the iron core end face is achieved by assembling injection molded parts, and the insulation skeleton function is achieved by using insulating paper, insulating film or coating on the side of the wire groove; 4. The iron core is injection molded as an insert, but because the stack height is very long, side injection molding cannot be achieved, so the side insulation is achieved by using insulating paper or insulating film or coating; The above two solutions have relatively low requirements for plastic fluidity, but require the assembly of insulating paper or insulating film or coating, and the process is complicated. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a motor stator with an integrated insulating frame, which is easy to manufacture and can meet the requirements of high stack height and high slot fill factor.

[0007] To achieve the above-mentioned objectives, this utility model adopts the following technical solution:

[0008] A motor stator with an integrated insulating frame includes a winding and a stator core. The stator core has multiple stator teeth spaced at equal intervals. The winding is formed by connecting multiple coils in sequence, with each coil wound around a corresponding stator tooth. The upper and lower ends of the stator teeth are respectively provided with an upper injection-molded frame and a lower injection-molded frame. Slotted liner paper is also provided on both sides of the stator teeth, with the upper and lower ends of the slotted liner paper inserted into the upper and lower injection-molded frames, respectively.

[0009] As a preferred embodiment, both the upper and lower injection molded skeletons include a middle connecting block and side wings at both the inner and outer ends, and the middle connecting block is provided with a flow guide unit block on both sides.

[0010] As a preferred embodiment, multiple guide channel unit blocks are spaced apart, and a gap is formed between the guide channel unit blocks and the intermediate connecting block for inserting the channel liner paper.

[0011] As a preferred embodiment, the thickness of the guide groove unit block increases sequentially from the middle to both ends, making the gap inclined, thereby causing the upper and lower ends of the groove liner paper to fold towards the stator teeth.

[0012] As a preferred embodiment, a limiting notch for coil lead-out is also provided on one side wing of the upper injection-molded skeleton.

[0013] As a preferred embodiment, the stator core and slot liner are integrally injection molded with the upper and lower injection molded skeletons as inserts.

[0014] As a preferred embodiment, the groove liner material is PEEK, PEAK, or PPSU, and the thickness of the groove liner is 0.1-0.2 mm.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention provides an upper injection-molded skeleton and a lower injection-molded skeleton at the top and bottom of the stator teeth of the stator core, respectively. The injection-molded skeleton is used to fix the slot liner paper on the side of the stator teeth, which can meet the requirements of high stacking height and high slot fill rate. At the same time, the upper and lower injection-molded skeletons are formed by integral injection molding of the iron core and slot liner paper as inserts, which makes the process simpler and simplifies the assembly and production steps of the motor stator. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a single stator tooth and coil of this utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of a single stator tooth of this utility model;

[0021] Figure 4 This is an exploded view of a single stator tooth and coil of this utility model;

[0022] Figure 5 and Figure 6 This is a schematic diagram of the upper injection-molded skeleton of this utility model from two different angles.

[0023] The attached figures are labeled as follows: 1. Stator core; 11. Stator teeth; 2. Upper injection molded frame; 20. Side wing; 21. Limiting notch; 22. Guide groove unit block; 23. Gap; 3. Lower injection molded frame; 4. Coil; 5. Groove liner paper. Detailed Implementation

[0024] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] 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.

[0026] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., 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, 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.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "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, unless otherwise expressly defined.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0031] like Figures 1 to 3 As shown, a motor stator with an integrated insulating frame includes a winding and a stator core 1. The stator core 1 has multiple stator teeth 11 spaced at equal intervals. The winding is formed by connecting multiple coils 4 in sequence. Each coil 4 is wound around a corresponding stator tooth 11. The upper and lower ends of the stator tooth 11 are respectively provided with an upper injection-molded frame 2 and a lower injection-molded frame 3. The two sides of the stator tooth 11 are also provided with slotted liner paper 5. The upper and lower ends of the slotted liner paper 5 are respectively inserted into the upper injection-molded frame 2 and the lower injection-molded frame 3.

[0032] The upper injection-molded skeleton 2 also has a limiting notch 21 for the coil 4 to exit on one side wing 20. The stator core 1 and slot liner 5 are integrally injection molded with the upper injection-molded skeleton 2 and the lower injection-molded skeleton 3 as inserts. The insulating skeleton of this utility model uses the core and slot liner as inserts for integral injection molding, and the winding is done by teeth after injection molding; the core and slot liner are positioned by injection molding and then injection molded into a plastic part structure, which serves as a material escape structure to fix the slot liner; the slot liner is made of PEEK, PEAK or PPSU, and the thickness of the side slot liner of the new structure is 0.15mm. This structure can be used for insulating skeleton structures with side wall thickness of 0.05mm-0.25mm.

[0033] Both the upper injection-molded skeleton 2 and the lower injection-molded skeleton 3 include a middle connecting block and side wings 20 at both the inner and outer ends. A flow guide unit block 22 is provided on each side of the middle connecting block. Multiple flow guide unit blocks 22 are spaced apart, and a gap 23 is formed between the flow guide unit blocks 22 and the middle connecting block for inserting the groove liner paper 5. The thickness of the flow guide unit block 22 increases sequentially from the middle to both ends, making the gap 23 inclined, thereby causing the upper and lower ends of the groove liner paper 5 to fold towards the stator teeth 11.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A motor stator employing an integrated insulating frame, comprising windings and a stator core (1), wherein a plurality of stator teeth (11) are equally spaced on the stator core (1), and the windings are formed by sequentially connecting a plurality of coils (4), each coil (4) being wound on a corresponding stator tooth (11), characterized in that: The stator tooth section (11) is provided with an upper end injection molding skeleton (2) and a lower end injection molding skeleton (3) at its upper and lower ends respectively. The stator tooth section (11) is also provided with groove liner paper (5) on both sides. The upper and lower ends of the groove liner paper (5) are respectively inserted into the upper end injection molding skeleton (2) and the lower end injection molding skeleton (3).

2. A motor stator with an integrated insulating frame according to claim 1, characterized in that, The upper injection molding skeleton (2) and the lower injection molding skeleton (3) both include a middle connecting block and side wings (20) at both the inner and outer ends. The middle connecting block is provided with a flow guide unit block (22) on both sides.

3. A motor stator employing an integrated insulating frame according to claim 2, characterized in that, Multiple guide channel unit blocks (22) are spaced apart, and a gap (23) is formed between the guide channel unit blocks (22) and the intermediate connecting block for inserting the channel liner paper (5).

4. A motor stator employing an integrated insulating frame according to claim 2, characterized in that, The thickness of the guide groove unit block (22) increases from the middle to both ends, making the gap (23) inclined, which in turn causes the upper and lower ends of the groove liner paper (5) to fold towards the stator teeth (11).

5. A motor stator employing an integrated insulating frame according to claim 2, characterized in that, The upper injection-molded skeleton (2) is also provided with a limiting notch (21) for the coil (4) to exit.

6. A motor stator employing an integrated insulating frame according to claim 1, characterized in that, The stator core (1) and slot liner (5) are integrally injection molded with the upper injection molded skeleton (2) and the lower injection molded skeleton (3) as inserts.

7. A motor stator employing an integrated insulating frame according to claim 1, characterized in that, The groove liner (5) is made of PEEK, PEAK or PPSU and has a thickness of 0.1-0.2 mm.

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