Full circle type stator structure

Abstract

The utility model relates to the technical field of motor stators, in particular to a full-circle type stator structure, which comprises a stator body, the stator body comprises two stator iron cores which are arranged in a mutually matched manner, each stator iron core comprises a first punching sheet group and a plurality of second punching sheet groups, and the plurality of second punching sheet groups are laminated on the first punching sheet group at equal angles. The first punching sheet group comprises a plurality of laminated first stator punching sheets, each first stator punching sheet comprises an annular yoke part and a plurality of tooth parts, the plurality of tooth parts are distributed on the inner side of the annular yoke part at equal angles along the circumference, the number of the tooth parts is the same as that of the second punching sheet groups, and the plurality of second punching sheet groups are laminated on the plurality of tooth parts one by one; the first punching sheet group comprises a plurality of tooth portions, a first matching piece located on the inner side wall of the annular yoke portion is arranged between every two adjacent tooth portions, the second punching sheet group comprises a plurality of second stator punching sheets, second matching pieces are arranged on the second stator punching sheets, the two stator iron cores are matched and connected through the first matching pieces and the second matching pieces, and the slot filling rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of motor stators, in particular to a full-circle stator structure. Background Art

[0002] Due to the special winding method of the traditional full-circle stator core, a larger space needs to be reserved for the slot to avoid the winding nozzle, resulting in a reduction in the effective slot area and a low winding slot fill rate.

[0003] For example, on February 21, 2020, a patent with announcement number CN107294233B was disclosed, and the name is a stator structure, including a shaft cylinder arranged on a base, a bearing, a silicon steel sheet group and a pressed part. The silicon steel sheet group is composed of a plurality of silicon steel sheets, and the silicon steel sheet group is sleeved on the outer side of the shaft cylinder and has an upper end face and a lower end face. The number of silicon steel sheets in the patent is limited, and the space left between two adjacent silicon steel sheets is relatively large, and the winding slot fill rate of the winding is low. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a full-circle stator structure to solve the problem of low slot fill rate.

[0005] Based on the above purpose, the utility model provides a full-circle stator structure, including a stator body, the stator body including two stator cores arranged in cooperation with each other, the stator core including a first punching sheet group and a plurality of second punching sheet groups, the stacking thickness of the first punching sheet group and the second punching sheet group is consistent, a plurality of the second punching sheet groups are stacked on the first punching sheet group at equal angles, the first punching sheet group includes a plurality of stacked first stator punching sheets, the first stator punching sheet includes an annular yoke and a plurality of teeth, the plurality of teeth are distributed on the inner side of the annular yoke at equal angles along the circumference, the number of teeth on each of the first stator punching sheets is the same as the number of the second punching sheet groups, a plurality of the second punching sheet groups are stacked one by one on the plurality of teeth, a first matching piece located on the inner side wall of the annular yoke is arranged between two adjacent teeth, the second punching sheet group includes a plurality of second stator punching sheets, and a second matching piece is arranged at one end of the second stator punching sheet away from the center of the annular yoke, and the matching setting between the two stator cores is through the matching connection of the first matching piece and the second matching piece.

[0006] Optionally, the first fitting member and the second fitting member are arranged through transition fitting.

[0007] Optionally, the first matching piece is arranged at a middle position between two adjacent teeth.

[0008] Optionally, the first mating piece is a slot provided on the inner wall of the annular yoke, and the second mating piece is a block provided on the second stator punching sheet and engaged with the slot.

[0009] Optionally, an insulating material layer is provided on the outer side of the tooth portion.

[0010] Optionally, a fixing buckle is provided on the tooth portion, and the connection between the overlapping teeth portions is achieved through the fixing buckle.

[0011] Optionally, the fixing buckle is a fixing groove and a fixing block arranged in cooperation therewith.

[0012] The beneficial effects of the utility model are as follows: the utility model provides a full-circle stator structure, which forms a stator core for winding through a stacked structure of multiple first stator punching sheets and second stator punching sheets. After the winding is completed, the two stator cores are merged through a first matching piece and a second matching piece, which effectively utilizes the space reserved for avoiding the winding nozzle, improves the winding slot fill rate, thereby improving the motor slot fill rate, improving the motor efficiency, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of the stator core of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the first stator punching sheet of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the second stator punching sheet of the utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the first matching piece and the second matching piece of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the stator body of the utility model.

[0019] In the figure: 1. stator core; 2. first stator punching sheet; 21. annular yoke; 22. tooth portion; 3. second stator punching sheet; 4. first matching piece; 5. second matching piece; 6. stator body. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figures 1 to 5 As shown, a full-circle stator structure includes a stator body 6, wherein the stator body 6 includes two stator cores 1 arranged in cooperation with each other, wherein the stator core 1 includes a first punching sheet group and a plurality of second punching sheet groups, wherein the stacking thickness of the first punching sheet group and the second punching sheet group is consistent, wherein a plurality of the second punching sheet groups are stacked on the first punching sheet group at equal angles, wherein the first punching sheet group includes a plurality of stacked first stator punching sheets 2, wherein the first stator punching sheet 2 includes an annular yoke 21 and a plurality of tooth portions 22, wherein the plurality of tooth portions 22 are distributed on the inner side of the annular yoke 21 at equal angles along the circumference The number of teeth 22 on each of the first stator punching sheets 2 is the same as the number of second punching sheet groups, and multiple second punching sheet groups are stacked one by one on the multiple teeth 22. A first mating piece 4 located on the inner wall of the annular yoke 21 is arranged between two adjacent tooth portions 22. The second punching sheet group includes multiple second stator punching sheets, and a second mating piece 5 is arranged at one end of the second stator punching sheet away from the center of the annular yoke 21. The mating arrangement between the two stator cores 1 is connected by the mating of the first mating piece 4 and the second mating piece 5.

[0023] After the two stator cores 1 are formed by die stamping, an insulating layer is formed on the stator core 1 by surface coating and then winding is performed. After the winding is completed, the two stator cores 1 are combined by a first fitting 4 and a second fitting 5 to complete the production of the entire stator body 6, which effectively utilizes the space reserved for avoiding the winding nozzle, and also helps the stator core 1 to avoid the winding nozzle during winding, thereby improving the winding slot full rate, thereby further improving the motor slot full rate, improving the motor efficiency, and reducing the production cost.

[0024] The first matching piece 4 and the second matching piece 5 are arranged through transition fitting to facilitate the connection between the two stator cores 1 .

[0025] The first matching member 4 is arranged in the middle of two adjacent teeth 22, so as to facilitate uniform arrangement of the coils installed on each tooth 22, thereby improving the slot fill rate of the motor.

[0026] The first matching piece 4 is a slot provided on the inner wall of the annular yoke 21 , and the second matching piece 5 is a block provided on the second stator punching sheet and engaged with the slot, so as to facilitate the matching setting between the two stator cores 1 .

[0027] An insulating material layer is disposed on the outer side of the tooth portion 22 to enhance the insulation performance between the winding wound on the tooth portion 22 and the stator core 1 .

[0028] The tooth portion 22 is provided with a fixing buckle, through which the overlapping tooth portions 22 can be connected, wherein the fixing buckle can be a fixing groove and a fixing block arranged in cooperation therewith, and the setting of the fixing buckle facilitates improving the fixation of the stacking, so that the stator core 1 is not easy to loosen.

[0029] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0030] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A full-circle stator structure, comprising a stator body (6), characterized in that: The stator body (6) comprises two stator cores (1) arranged in cooperation with each other, the stator core (1) comprises a first punching sheet group and a plurality of second punching sheet groups, the stacking thickness of the first punching sheet group and the second punching sheet group is consistent, the plurality of second punching sheet groups are stacked on the first punching sheet group at equal angles, the first punching sheet group comprises a plurality of stacked first stator punching sheets (2), the first stator punching sheet (2) comprises an annular yoke (21) and a plurality of teeth (22), the plurality of teeth (22) are distributed at equal angles along the circumference on the inner side of the annular yoke (21), and each of the first stator punching sheets (2) has a plurality of teeth (22) arranged on the inner side of the annular yoke (21). The number of the tooth portions (22) is the same as the number of the second punching sheet groups, a plurality of the second punching sheet groups are stacked one by one on the plurality of the tooth portions (22), a first mating piece (4) located on the inner wall of the annular yoke (21) is arranged between two adjacent tooth portions (22), the second punching sheet group comprises a plurality of second stator punching sheets (3), a second mating piece (5) is arranged at one end of the second stator punching sheet (3) away from the center of the annular yoke (21), and the mating arrangement between the two stator cores (1) is through the mating connection of the first mating piece (4) and the second mating piece (5).

2. A full-circle stator structure according to claim 1, characterized in that: The first fitting part (4) and the second fitting part (5) are arranged through transition fitting.

3. A full-circle stator structure according to claim 1, characterized in that: The first matching piece (4) is arranged at a middle position between two adjacent tooth portions (22).

4. The full-circle stator structure according to claim 1, characterized in that: The first matching piece (4) is a slot provided on the inner wall of the annular yoke (21), and the second matching piece (5) is a clamping block provided on the second stator punching sheet (3) and engaged with the slot.

5. The full-circle stator structure according to claim 1, characterized in that: An insulating material layer is provided on the outer side of the tooth portion (22).

6. The full-circle stator structure according to claim 1, characterized in that: The tooth portions (22) are provided with fixing buckles, and the connection between the overlapping tooth portions (22) is achieved through the fixing buckles.

7. A full-circle stator structure according to claim 6, characterized in that: The fixing buckle is a fixing groove and a fixing block matched therewith.

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