Motor stator adopting injection molding insulation framework

Abstract

The utility model relates to a motor stator adopting an injection molding insulation framework, which comprises a winding and a stator core, a plurality of tooth parts are arranged on the stator core at equal intervals, the inner ends of the tooth parts extend towards the two sides to form convex edges, the winding is formed by sequentially connecting a plurality of coils, each coil is wound on the corresponding tooth part, and the inner ends of the tooth parts extend towards the two sides to form convex edges. An upper framework and a lower framework are further arranged between the coil and the tooth part, and the upper framework and the lower framework are respectively buckled on the tooth part and are mutually inserted to completely cover the tooth part; flow guide ribs are arranged on the two sides of the upper framework and the two sides of the lower framework, and winding guide grooves are formed among the multiple flow guide ribs. According to the utility model, the upper framework and the lower framework which are split are adopted, and the upper framework and the lower framework wrap the tooth part in an inserted manner, so that safe and stable electrical performance is ensured; the two sides of the upper framework and the lower framework are provided with the diversion ribs which simulate the outer diameter of the coil, so that the lowest layer of the coil can be helped to be wound and positioned, and the assembly convenience is improved.

Description

Technical Field

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

[0002] A motor stator generally consists of a stator core and windings wound on the stator core. To ensure insulation between the stator core and the windings, an insulating frame or similar structure is usually installed between the windings and the stator core. The current insulating frame structure of motor stators is as follows: the insulating frame is a split upper and lower type with smooth sides; the overlap area between the upper and lower frames adopts a smooth, center-split overlap design; to meet the requirement of high slot fill factor, the side walls of the upper and lower frames are designed with thin walls (0.25mm thick, 28.5mm long).

[0003] The upper and lower skeletons of the above structure have smooth sides, which is not conducive to positioning during winding. The thickness of the overlap area of ​​the upper and lower skeletons is only 0.125mm, which makes it unsuitable for mass production. The products are prone to not being fully molded, resulting in a high defect rate. Furthermore, the 0.125mm thickness of the overlap area makes it impossible to design a guide structure, which is inconvenient for assembly. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a motor stator with an injection-molded insulating frame. The frame of this stator structure is easy to manufacture and assemble, can ensure electrical performance and is easy to wind.

[0005] To achieve the above-mentioned objectives, this utility model adopts the following technical solution:

[0006] A motor stator using an injection-molded insulating frame includes a winding and a stator core. The stator core has multiple teeth spaced at equal intervals, and the inner ends of the teeth extend to both sides to form protruding ridges. The winding is formed by connecting multiple coils in sequence, with each coil wound around a corresponding tooth. An upper frame and a lower frame are provided between the coil and the tooth. The upper frame and the lower frame are respectively fastened to the tooth and interlocked to completely cover the tooth. Guide ribs are provided on both sides of the upper frame and the lower frame, and winding guide grooves are formed between the multiple guide ribs.

[0007] As a preferred embodiment, the upper and lower skeletons are U-shaped, with their openings facing each other and inserted into the toothed portion. Both the upper and lower skeletons include end portions and sidewall portions on both sides. The guide ribs are located on the sidewall portions and extend to the corner where the end portion connects to the sidewall portion.

[0008] As a preferred embodiment, the side wall of the upper frame is provided with a wavy overlapping portion A near the opening, and the side wall of the lower frame is provided with an overlapping portion B near the opening. The two overlapping portions A are respectively inserted into the inner side of the two overlapping portions B, so that the upper frame and the lower frame are fixed.

[0009] As a preferred embodiment, the surface undulation formed by the multiple guide ribs on the side wall is greater than the surface undulation of the overlapping part A.

[0010] As a preferred embodiment, the upper frame and the lower frame are respectively provided with side wings on their inner and outer sides, and one of the side wings is provided with a limiting notch for the coil to exit.

[0011] As a preferred embodiment, the thickness of the sidewall portion of the upper and lower frame is 0.45-0.65 mm, and the thickness of the overlapping portion A and overlapping portion B is 0.15-0.35 mm.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model adopts a split upper frame and lower frame, with the upper and lower frames interlocking and covering the toothed part to ensure safe and stable electrical performance; and both sides of the upper frame and lower frame are provided with guide ribs in the shape of the outer diameter of the coil, which can help the bottom layer of the coil to be wound and positioned, improving assembly convenience. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partially enlarged structural schematic diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the disassembly and assembly structure of the upper and lower frames of this utility model.

[0018] Figure 4 This is a schematic diagram of the upper frame of this utility model.

[0019] The attached figures are labeled as follows: 1. Stator core; 11. Tooth; 12. Raised ridge; 2. Upper frame; 20. End; 21. Side wall; 22. Guide rib; 23. Overlap A; 24. Side wing; 25. Limiting notch; 3. Lower frame; 31. Overlap B; 4. Coil. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] like Figures 1 to 4 As shown, a motor stator using an injection-molded insulating frame includes a winding and a stator core 1. The stator core 1 has multiple teeth 11 spaced at equal intervals, and the inner ends of the teeth 11 extend to both sides to form protruding ridges 12. The winding is formed by multiple coils 4 connected in sequence, with each coil 4 wound around a corresponding tooth 11. An upper frame 2 and a lower frame 3 are also provided between the coil 4 and the tooth 11. The upper frame 2 and the lower frame 3 are respectively fastened to the tooth 11 and interlocked to completely cover the tooth 11. Guide ribs 22 are provided on both sides of the upper frame 2 and the multiple guide ribs 22 form winding guide grooves.

[0028] The upper frame 2 and lower frame 3 are U-shaped, with their openings facing each other and inserted into the toothed portion 11. Both the upper frame 2 and lower frame 3 include an end portion 20 and side wall portions 21 on both sides. The guide rib 22 is located on the side wall portion 21 and extends to the corner where the end portion 20 and the side wall portion 21 connect. The upper frame 2 and lower frame 3 are also provided with side wings 24 on their inner and outer sides, and one of the side wings 24 is provided with a limiting notch 25 for the coil 4 to exit.

[0029] The sidewall portion 21 of the upper frame 2 is provided with a wavy overlapping portion A23 near the opening, and the sidewall portion 21 of the lower frame 3 is provided with an overlapping portion B31 near the opening. The two overlapping portions A23 are respectively inserted into the inner sides of the two overlapping portions B31, thus fixing the upper frame 2 and the lower frame 3. The surface undulation formed by the multiple guide ribs 22 on the sidewall portion 21 is greater than the surface undulation of the overlapping portion A23. The thickness of the sidewall portion 21 of the upper frame 2 and the lower frame 3 is 0.45-0.65 mm, and the thickness of the overlapping portions A23 and B31 is 0.15-0.35 mm.

[0030] The insulating frame of this utility model adopts a split injection molding design. The sides of the upper and lower frames are designed with guide ribs, the shape of which imitates the outer diameter of the coil. The thickness of the guide rib area is increased from 0.25mm to 0.53mm compared to the original design. The overlapping area of ​​the upper and lower frames is also designed with guide ribs, the shape of which is wavy or other irregular structure, to improve the injection molding of the overlapping area. The thickness of the guide rib area in the overlapping area is increased from 0.125mm to 0.25mm compared to the original design. The overlapping area is designed with a guide structure: the thickness of 0.25mm makes the design guide possible. The guide is used to reduce the contact area and increase clearance when assembling the upper and lower frames.

[0031] 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.

[0032] 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 using an injection-molded insulating frame, comprising a winding and a stator core (1), wherein a plurality of teeth (11) are equally spaced on the stator core (1), and the inner ends of the teeth (11) extend to both sides to form protruding ridges (12); the winding is formed by a plurality of coils (4) connected sequentially, each coil (4) being wound on a corresponding tooth (11), characterized in that: An upper skeleton (2) and a lower skeleton (3) are provided between the coil (4) and the tooth (11). The upper skeleton (2) and the lower skeleton (3) are respectively fastened to the tooth (11) and interlocked to completely cover the tooth (11). Both sides of the upper skeleton (2) and the lower skeleton (3) are provided with guide ribs (22), and multiple guide ribs (22) form a winding guide groove.

2. A motor stator with an injection-molded insulating frame according to claim 1, characterized in that, The upper skeleton (2) and the lower skeleton (3) are U-shaped, with their openings facing each other and inserted into the toothed part (11). The upper skeleton (2) and the lower skeleton (3) both include an end (20) and side wall parts (21) on both sides. The guide rib (22) is located in the side wall part (21) and extends to the corner where the end (20) and the side wall part (21) meet.

3. A motor stator employing an injection-molded insulating frame according to claim 2, characterized in that, The side wall portion (21) of the upper frame (2) is provided with a wavy overlapping portion A (23) near the opening, and the side wall portion (21) of the lower frame (3) is provided with an overlapping portion B (31) near the opening. The two overlapping portions A (23) are respectively inserted into the inner side of the two overlapping portions B (31), so that the upper frame (2) and the lower frame (3) are fixed.

4. A motor stator employing an injection-molded insulating frame according to claim 2, characterized in that, The surface undulation formed by the multiple guide ribs (22) on the side wall (21) is greater than the surface undulation of the overlapping part A (23).

5. A motor stator employing an injection-molded insulating frame according to claim 2, characterized in that, The upper frame (2) and the lower frame (3) are respectively provided with side wings (24) on the inner and outer sides, and one of the side wings (24) is provided with a limiting notch (25) for the coil (4) to exit.

6. A motor stator employing an injection-molded insulating frame according to claim 3, characterized in that, The thickness of the side wall portion (21) of the upper frame (2) and the lower frame (3) is 0.45-0.65mm, and the thickness of the overlapping portion A (23) and the overlapping portion B (31) is 0.15-0.35mm.

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