Motor stator core structure

Abstract

The utility model discloses a motor stator core structure, comprising a plurality of iron core sheets which are sequentially stacked up and down, and the middle part of each iron core sheet is provided with a circular hole; each iron core sheet comprises an annular ring body part, a plurality of semicircular grooves extending in the axial direction are formed in the inner side wall of the circular hole, twelve T-shaped wrapping posts are integrally and outwards arranged on the peripheral side wall of the ring body part in a protruding mode, and the twelve T-shaped wrapping posts are sequentially and evenly arranged at intervals in the circumferential direction; the T-shaped wrapping post comprises a main body part and a transverse plate part, one end of the main body part is integrally connected to the peripheral side wall of the ring body part, the transverse plate part is integrally connected to the end, away from the ring body part, of the main body part, the transverse plate part extends in the circumferential direction, and the included angle between the inner side face of the transverse plate part and the main body part is a right angle; the inner side surface and the outer side surface of the transverse plate part in the circumferential direction are connected through an arc-shaped transition surface; the stator iron core is a twelve-pole stator iron core, can select more speeds and gears, and can achieve the purposes of preventing wire hanging and preventing winding from being cut off.

Description

Technical Field

[0001] The utility model relates to the technical field of motor stators, in particular to a motor stator core structure. 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 sheet winding group is not good enough, and there is also a problem of large heat generation. For this reason, some stator punching sheets with strong stability and capable of reducing the heat generation efficiency have emerged one after another. For example, a stator punching sheet 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 outward 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 spacedly arranged 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 appropriately reducing the heat generation, however, only 4 T-shaped winding posts are provided, which is a four-pole stator core, and there are fewer speeds and gears to choose from. Moreover, both ends of the head of the T-shaped winding post facing the inner groove side are sharp corners, which may cause wire hanging and wire cutting 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 motor stator core structure, which is a twelve-pole stator core, can have more speeds and gears to choose from, and can achieve the purpose of preventing wire hanging and preventing wire cutting.

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

[0006] A motor stator core structure includes a plurality of iron punching sheets stacked on top of each other in sequence. A circular hole is provided in the middle of each iron punching sheet. Each iron punching sheet includes an annular ring body portion, and the circular hole is formed in the middle of the ring body portion. Adjacent two iron punching sheets are connected together by riveting. A plurality of semi-circular grooves extending in the axial direction are provided on the inner side wall of the circular hole. Twelve T-shaped winding posts are integrally protruded outward from the outer peripheral side wall of the ring body portion, and the twelve T-shaped winding posts are arranged at equal intervals in sequence along the circumferential direction;

[0007] The T-shaped winding post includes a main body portion and a transverse plate portion. One end of the main body portion is integrally connected to the outer peripheral side wall of the ring body portion. The transverse plate portion is integrally connected to the end of the main body portion away from the ring body portion. The transverse plate portion extends in the circumferential direction. The two ends of the transverse plate portion in the circumferential direction respectively protrude outside the two ends of the main body portion. The included angle between the inner side surface of the transverse plate portion and the main body portion is a right angle. The outer side surface of the transverse plate portion is arc-shaped. Between the inner side surface and the outer side surface of the transverse plate portion in the circumferential direction, they are connected by an arc-shaped transition surface.

[0008] As a preferred solution, four semi-circular grooves are provided, and the four semi-circular grooves are arranged in sequence at equal intervals in the circumferential direction.

[0009] As a preferred solution, a winding space is formed between the inner side surface of the transverse plate portion and the outer peripheral side wall of the ring body portion, and the main body portion is located in the winding space.

[0010] As a preferred solution, a first R corner is provided at the connection between the inner side surface of the transverse plate portion and the main body portion.

[0011] As a preferred solution, a second R corner is provided at the connection between the main body portion and the outer peripheral side wall of the ring body portion.

[0012] As a preferred solution, the upper and lower surfaces of the ring body portion are flush with the upper and lower surfaces of the main body portion.

[0013] As a preferred solution, the upper and lower surfaces of the main body portion are flush with the upper and lower surfaces of the transverse plate portion.

[0014] As a preferred solution, a riveting convex portion protrudes downward from the lower surface of the main body portion, and a riveting concave portion is recessed in the upper surface of the main body portion corresponding to the riveting convex portion.

[0015] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions, it mainly integrally protrudes twelve T-shaped winding posts outward from the outer peripheral side wall of the ring body portion, and the twelve T-shaped winding posts are arranged in sequence at equal intervals in the circumferential direction. In this way, through the arrangement of the twelve T-shaped winding posts, it can be a twelve-pole stator core, so that more speeds and gears can be selected; and, by connecting the inner side surface and the outer side surface of the transverse plate portion through an arc-shaped transition surface in the circumferential direction, in this way, through the design of the arc-shaped transition surface, it can achieve the purpose of preventing burrs and preventing the wire from getting caught and being cut on the T-shaped winding post.

[0016] To more clearly illustrate the structural features, technical means, and the specific purposes and functions achieved by the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. Description of the Drawings

[0017] Figure 1 is the top view of an embodiment of the present utility model;

[0018] Figure 2 is the schematic cross-sectional view of an embodiment of the present utility model.

[0019] Explanation of the reference numerals in the drawings:

[0020] 10. Iron chip 11. Round hole

[0021] 12. Ring body part 13. Semi-circular groove

[0022] 14. T-shaped winding post 141. Main body part

[0023] 142. Horizontal plate part 143. Arc transition surface

[0024] 15. Winding space 16. First R corner

[0025] 17. Second R corner 18. Riveting convex part

[0026] 19. Riveting concave part. Detailed implementation manners

[0027] Please refer to Figures 1 to 2 as shown, which shows the specific structure of an embodiment of the present utility model. The present utility model is specifically the stator core structure of a DC motor.

[0028] As Figure 1 and Figure 2 shown, a stator core structure of a motor includes a plurality of iron chips 10 stacked on top of each other in sequence from top to bottom. Each iron chip 10 has a round hole 11 in the middle; each iron chip 10 includes a ring-shaped ring body part 12, and the round hole 11 is formed in the middle of the ring body part 12; two adjacent iron chips 10 are connected together by riveting. A riveting convex part 18 protrudes downward from the lower surface of the main body part 141, and a riveting concave part 19 is recessed in the upper surface of the main body part 141 corresponding to the riveting convex part 18. The riveting convex part 18 and the riveting concave part 19 are both arranged on one side of the main body part 141 close to the horizontal plate part 142. In this way, through the combined design of the riveting convex part 18 and the riveting concave part 19, the riveting connection between two adjacent iron chips 10 can be realized.

[0029] As Figure 1 shown, a plurality of semi-circular grooves 13 extending in the axial direction are provided on the inner side wall of the round hole 11. Four semi-circular grooves 13 are provided, and the four semi-circular grooves 13 are arranged at equal intervals in the circumferential direction in sequence. In this way, through the setting of the semi-circular grooves 13, it is convenient for the subsequent assembly and positioning of other components. Especially, the four semi-circular grooves 13 can be used for the assembly and positioning of four components.

[0030] As Figure 1 shown, twelve T-shaped winding posts 14 are integrally protruded outward from the outer peripheral side wall of the ring body part 12. The twelve T-shaped winding posts 14 are arranged at equal intervals in sequence along the circumferential direction. In this way, by the arrangement of the twelve T-shaped winding posts 14, it can be made into a twelve-pole stator core, so that more speeds and gears can be selected; in this embodiment, the T-shaped winding post 14 includes a main body part 141 and a transverse plate part 142. One end of the main body part 141 is integrally connected to the outer peripheral side wall of the ring body part 12. The transverse plate part 142 is integrally connected to the end of the main body part 141 away from the ring body part 12. The transverse plate part 142 extends along the circumferential direction. The two ends of the transverse plate part 142 in the circumferential direction respectively extend out of the two ends of the main body part 141. A winding space 15 is formed between the inner side surface of the transverse plate part 142 and the outer peripheral side wall of the ring body part 12. The main body part 141 is located in the winding space 15. The upper and lower surfaces of the ring body part 12 are flush with the upper and lower surfaces of the main body part 141. The upper and lower surfaces of the main body part 141 are flush with the upper and lower surfaces of the transverse plate part 142, so as to keep the upper and lower surfaces of the iron core chip 10 flat.

[0031] As Figure 1 shown, the included angle between the inner side surface of the transverse plate part 142 and the main body part 141 is a right angle. In this way, it can keep the outside of the winding group flat after winding; the outer side surface of the transverse plate part 142 is arc-shaped; between the inner side surface and the outer side surface of the transverse plate part 142 in the circumferential direction is connected by an arc transition surface 143. And, a first R corner 16 is provided at the connection between the inner side surface of the transverse plate part 142 and the main body part 141. A second R corner 17 is provided at the connection between the main body part 141 and the outer peripheral side wall of the ring body part 12. In this way, through the combined design of the arc transition surface 143, the first R corner 16, and the second R corner 17, it can achieve the purpose of preventing burrs and preventing wire snagging and wire cutting on the T-shaped winding post 14.

[0032] In summary, the design focus of the present utility model is that mainly twelve T-shaped winding posts are integrally protruded outward from the outer peripheral side wall of the ring body part, and the twelve T-shaped winding posts are arranged at equal intervals in sequence along the circumferential direction. In this way, by the arrangement of the twelve T-shaped winding posts, it can be made into a twelve-pole stator core, so that more speeds and gears can be selected; and, by connecting the inner side surface and the outer side surface of the transverse plate part by an arc transition surface in the circumferential direction. In this way, through the design of the arc transition surface, it can achieve the purpose of preventing burrs and preventing wire snagging and wire cutting on the T-shaped winding post 14.

[0033] The above are only the preferred embodiments of the present utility model, and do not impose any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on 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 structure of an electric machine, comprising a plurality of iron core sheets stacked layer by layer from top to bottom in sequence, and a circular hole is formed in the middle of each iron core sheet; each iron core sheet includes an annular ring portion, and the circular hole is formed in the middle of the ring portion; characterized in that: Two adjacent iron chips are connected together by riveting. The inner side wall of the round hole is provided with a plurality of semi-circular grooves extending in the axial direction. Twelve T-shaped winding posts protrude integrally outward from the outer peripheral side wall of the ring body portion, and the twelve T-shaped winding posts are arranged at equal intervals in the circumferential direction in sequence. The T-shaped winding post includes a main body portion and a transverse plate portion. One end of the main body portion is integrally connected to the outer peripheral side wall of the ring body portion, and the transverse plate portion is integrally connected to the end of the main body portion far from the ring body portion. The transverse plate portion extends in the circumferential direction, and both ends of the transverse plate portion in the circumferential direction respectively extend out of both ends of the main body portion. The included angle between the inner side surface of the transverse plate portion and the main body portion is a right angle, and the outer side surface of the transverse plate portion is arc-shaped; between the inner side surface and the outer side surface of the transverse plate portion in the circumferential direction is connected by an arc-shaped transition surface.

2. The structure of a motor stator core according to claim 1, wherein: There are four semi-circular grooves, and the four semi-circular grooves are arranged at equal intervals in the circumferential direction in sequence.

3. A stator core structure of an electric machine according to claim 1, wherein: A winding space is formed between the inner side surface of the transverse plate portion and the outer peripheral side wall of the ring body portion, and the main body portion is located in the winding space.

4. A stator core structure of an electric machine according to claim 1, characterized in that: A first R corner is provided at the connection between the inner side surface of the transverse plate portion and the main body portion.

5. A stator core structure of an electric machine according to claim 1, characterized in that: A second R corner is provided at the connection between the main body portion and the outer peripheral side wall of the ring body portion.

6. A stator core structure of an electric machine according to claim 1, characterized in that: The upper and lower surfaces of the ring body portion are flush with the upper and lower surfaces of the main body portion.

7. A stator core structure of an electric machine according to claim 1, characterized in that: The upper and lower surfaces of the main body portion are flush with the upper and lower surfaces of the transverse plate portion.

8. A stator core structure of an electric machine according to claim 1, characterized in that: A riveting convex portion protrudes downward from the lower surface of the main body portion, and a riveting concave portion is recessed in the upper surface of the main body portion corresponding to the riveting convex portion.

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