Stator core assembly

Abstract

The utility model discloses a stator iron core assembly, comprising a plurality of iron core sheets which are successively laminated from top to bottom, the middle part of each iron core sheet is provided with a circular hole, each iron core sheet comprises an annular stator yoke part, and the circular hole is formed in the middle part of the stator yoke part; every two adjacent iron core sheets are connected together through riveting, the inner side wall of each round hole is provided with a semicircular groove extending in the axial direction, the peripheral side wall of the stator yoke part is connected with a plurality of wrapping posts which are sequentially arranged at equal intervals in the circumferential direction, and each wrapping post comprises a connecting section and an outer ring section. One end of the connecting section is integrally formed and connected to the peripheral side wall of the stator yoke part, the outer ring section is integrally formed and connected to the other end of the connecting section, the included angle between the inner side surface of the outer ring section and the connecting section is a right angle, and the outer side surface of the outer ring section is an arc-shaped surface protruding outwards; first R angles are arranged at the two ends of the inner side face and the outer side face of the outer ring section in the circumferential direction; therefore, the purpose of preventing burrs and burrs can be achieved, and the winding can be prevented from being cut off.

Description

Technical Field

[0001] The utility model relates to the technical field of motor stators, and in particular to a stator core assembly. Background Art

[0002] The current traditional motor stator structure simply includes a stator yoke and winding posts. Under the same conditions, the stability of the traditional stator punching and winding group is not good enough, and there is a problem of large heat generation. For this reason, some stator punchings with strong stability and capable of reducing the heat generation efficiency have emerged one after another. For example, a stator punching of a new type of motor disclosed in Chinese Patent Publication No. CN208094298U includes a stator yoke. A plurality of T-shaped winding posts extend outwards along the circumferential direction from the outer circle of the stator yoke. A hollow circular hole is provided in the middle of the stator yoke. There are 4 T-shaped winding posts, and the outer walls thereof are arc-shaped and form an outer circle. Inner grooves are provided on the inner wall of the head of the T-shaped winding post and on both sides of the column body. A plurality of semi-circular grooves are provided at intervals on the inner wall of the hollow circular hole. Although it can strengthen the winding function through the inner grooves, thereby enhancing the stability and moderately reducing the heat generation, however, both ends of the head of the T-shaped winding post facing the inner groove side are sharp corners, resulting in easy occurrence of burrs and flash, and it is difficult to achieve the purpose of preventing burrs and flash, and the winding may be cut during winding.

[0003] Therefore, it is necessary to research a new technology to solve the above problems. Summary of the Utility Model

[0004] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide a stator core assembly, which can achieve the purpose of preventing burrs and flash and can prevent the winding from being cut.

[0005] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0006] A stator core assembly includes a plurality of iron core sheets stacked on top of each other in sequence. A circular hole is provided in the middle of the iron core sheet. The iron core sheet includes an annular stator yoke, and the circular hole is formed in the middle of the stator yoke. Adjacent two iron core sheets are connected together by riveting. A semi-circular groove extending in the axial direction is provided on the inner side wall of the circular hole. A plurality of winding posts are connected to the outer peripheral side wall of the stator yoke and are arranged at equal intervals in sequence along the circumferential direction. The winding post includes a connecting section and an outer ring section. One end of the connecting section is integrally formed and connected to the outer peripheral side wall of the stator yoke, and the outer ring section is integrally formed and connected to the other end of the connecting section. The included angle between the inner side surface of the outer ring section and the connecting section is a right angle. The outer side surface of the outer ring section is an arc-shaped surface protruding outwards. First R corners are provided at both ends of the inner side surface and the outer side surface of the outer ring section in the circumferential direction.

[0007] As a preferred solution, a second R corner is provided at the connection between the inner side surface of the outer ring section and the connection section.

[0008] As a preferred solution, a third R corner is provided at the connection between the connection section and the outer peripheral side wall of the stator yoke.

[0009] As a preferred solution, the upper and lower surfaces of the stator yoke are flush with the upper and lower surfaces of the connection section.

[0010] As a preferred solution, the upper and lower surfaces of the connection section are flush with the upper and lower surfaces of the outer ring section.

[0011] As a preferred solution, both ends of the outer ring section in the circumferential direction extend beyond the two ends of the connection section.

[0012] As a preferred solution, a winding space is formed between the inner side surface of the outer ring section and the outer peripheral side wall of the stator yoke, and the connection section is located within the winding space.

[0013] Compared with the prior art, the present utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions, it is mainly by providing first R corners at both ends in the circumferential direction of the inner side surface and the outer side surface of the outer ring section of the winding column. In this way, the first R corners can be used to achieve the purpose of preventing burrs and flash on the winding column, and can prevent the winding from being cut. Secondly, by making the angle between the inner side surface of the outer ring section and the connection section a right angle, the outer side of the winding group after winding can be kept flat. In addition, by providing a semicircular groove extending in the axial direction on the inner side wall of the round hole, it is convenient for the subsequent assembly and positioning of other components.

[0014] To more clearly illustrate the structural features, technical means, and the specific purposes and functions achieved by the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a top view of an embodiment of the present utility model;

[0016] Figure 2 is a cross-sectional schematic view of an embodiment of the present utility model.

[0017] Description of the reference numerals in the drawings:

[0018] 10. Iron core chip 11. Round hole

[0019] 12. Stator yoke 13. Semicircular groove

[0020] 14. Winding column 141. Connection section

[0021] 142. Outer ring section 15. First R corner

[0022] 16. Second R corner 17. Third R corner

[0023] 18. Winding space Detailed implementation manner

[0024] Please refer to Figures 1 to 2 as shown, which shows the specific structure of the embodiment of the present utility model

[0025] A stator core assembly includes a plurality of iron core sheets 10 stacked one above the other in sequence. A circular hole 11 is formed in the middle of the iron core sheet 10. The iron core sheet 10 includes an annular stator yoke portion 12, and the circular hole 11 is formed in the middle of the stator yoke portion 12; the diameters of the circular holes 11 of the plurality of iron core sheets 10 are the same, so that a through hole in a straight-through shape is formed in the whole core assembly; the number of the iron core sheets 10 can be set according to actual production requirements; a semi-circular groove 13 extending in the axial direction is provided on the inner side wall of the circular hole 11, and there is one semi-circular groove 13 to facilitate the assembly and positioning of other components in the subsequent process; a plurality of winding posts 14 are connected to the outer peripheral side wall of the stator yoke portion 12 and are arranged at equal intervals in sequence in the circumferential direction. In this embodiment, there are six winding posts 14, and the cross-section of the winding post 14 is a T-shaped structure protruding outwards

[0026] In this embodiment, the winding post 14 includes a connecting section 141 and an outer ring section 142. One end of the connecting section 141 is integrally connected to the outer peripheral side wall of the stator yoke portion 12, and the outer ring section 142 is integrally connected to the other end of the connecting section 141. The two ends of the outer ring section 142 in the circumferential direction respectively extend outside the two ends of the connecting section 141; a winding space 18 is formed between the inner side surface of the outer ring section 142 and the outer peripheral side wall of the stator yoke portion 12, and the connecting section 141 is located in the winding space 18; the upper and lower surfaces of the stator yoke portion 12 are flush with the upper and lower surfaces of the connecting section 141, and the upper and lower surfaces of the connecting section 141 are flush with the upper and lower surfaces of the outer ring section 142, so that the upper and lower surfaces of the iron core sheet 10 are kept flat

[0027] In this embodiment, the angle between the inner side surface of the outer ring section 142 and the connecting section 141 is a right angle. In this way, it can keep the outer side of the winding group flat after winding. The outer side surface of the outer ring section 142 is an arc surface protruding outwards. First R corners 15 are provided at both ends in the circumferential direction of the inner side surface and the outer side surface of the outer ring section 142. A second R corner 16 is provided at the connection between the inner side surface of the outer ring section 142 and the connecting section 141. A third R corner 17 is provided at the connection between the connecting section 141 and the outer peripheral side wall of the stator yoke 12. In this way, through the combined design of the first R corner 15, the second R corner 16 and the third R corner 17, it can achieve the purpose of preventing burrs and flash on the winding column 14, and can prevent wire snagging and wire cutting through the R corners.

[0028] In this embodiment, two adjacent iron core sheets 10 are connected together by riveting. Specifically, a riveting convex portion protrudes downward from the lower surface of the connecting section 141. Correspondingly, a riveting concave portion is recessed on the upper surface of the connecting section 141. Both the riveting convex portion and the riveting concave portion extend to the side of the outer ring section 142 close to the connecting section 141. In this way, through the combined design of the riveting convex portion and the riveting concave portion, the riveting connection between two adjacent iron core sheets 10 can be realized.

[0029] In summary, the key design of the present utility model is that first R corners are provided at both ends in the circumferential direction of the inner side surface and the outer side surface of the outer ring section of the winding column. In this way, through the first R corners, it can achieve the purpose of preventing burrs and flash on the winding column and can prevent wire cutting. Secondly, by making the angle between the inner side surface of the outer ring section and the connecting section a right angle, it can keep the outer side of the winding group flat after winding. And, by providing a semi-circular groove extending in the axial direction on the inner side wall of the round hole, it is convenient for the subsequent assembly and positioning of other components.

[0030] The above is only a preferred embodiment of the present utility model, and does not impose any limitation on the technical scope of the present utility model. Therefore, any minor modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A stator core assembly includes a plurality of iron core sheets stacked layer by layer from top to bottom. A circular hole is formed in the middle of each iron core sheet. The iron core sheet includes an annular stator yoke portion, and the circular hole is formed in the middle of the stator yoke portion. It is characterized in that: Two adjacent iron chips are connected together by riveting. A semi-circular groove extending in the axial direction is provided on the inner side wall of the round hole. A plurality of winding posts are connected to the outer peripheral side wall of the stator yoke and are arranged in sequence at equal intervals in the circumferential direction. The winding post includes a connecting section and an outer ring section. One end of the connecting section is integrally connected to the outer peripheral side wall of the stator yoke, and the outer ring section is integrally connected to the other end of the connecting section. The included angle between the inner side surface of the outer ring section and the connecting section is a right angle. The outer side surface of the outer ring section is an arc surface protruding outward. First R corners are provided at both ends in the circumferential direction of the inner side surface and the outer side surface of the outer ring section.

2. The stator core assembly according to claim 1, wherein: A second R corner is provided at the connection between the inner side surface of the outer ring section and the connecting section.

3. A stator core assembly according to claim 1, wherein: A third R corner is provided at the connection between the connecting section and the outer peripheral side wall of the stator yoke.

4. A stator core assembly according to claim 1, wherein: The upper and lower surfaces of the stator yoke are flush with the upper and lower surfaces of the connecting section.

5. A stator core assembly according to claim 1, wherein: The upper and lower surfaces of the connecting section are flush with the upper and lower surfaces of the outer ring section.

6. The stator core assembly according to claim 1, wherein: Both ends of the outer ring section in the circumferential direction respectively extend outside both ends of the connecting section.

7. A stator core assembly according to claim 1, characterized in that: A winding space is formed between the inner side surface of the outer ring section and the outer peripheral side wall of the stator yoke, and the connecting section is located in the winding space.

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