Stator core and stator comprising same

Abstract

The utility model provides a stator core and a stator comprising the same. The stator core comprises a plurality of laminated block rings. The splicing block ring comprises a plurality of iron core splicing blocks; each iron core block comprises at least one tooth part and a bottom, and the end face, deviating from the tooth part, of the bottom is arc-shaped; the bottoms of the iron core blocks are connected end to end around the axis of the stator iron core, the arc-shaped end faces of the bottoms form the circumferential face of a block ring, and every two adjacent tooth parts form a stator groove in the radial inner surface of the stator iron core. And at least one iron core splicing block is connected with the iron core splicing blocks on the adjacent layer through a mortise and tenon structure. According to the utility model, the stator iron core is formed by splicing the plurality of iron core splicing blocks, each layer of iron core splicing blocks are clamped through the mortise and tenon structures, and the stator iron core structure can bear stronger vibration and mechanical impact; meanwhile, an outer steel ring and a gland on the top side of the existing stator core are omitted; in addition, the single iron core splicing block is simple in structure, each iron core splicing block is convenient to assemble, and the processing cost and the assembling cost of the stator iron core are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of testing equipment, in particular to a stator iron core and a stator comprising the same. Background Art

[0002] In recent years, motor technology, especially permanent magnet synchronous motor technology, has developed rapidly. The motor body structure design has become increasingly novel and is also developing towards smaller size, higher output power and higher efficiency. How to obtain a rotor core with a stable structure and low cost, while the electronic core does not affect the working efficiency of the motor using it is a technical problem to be solved by the utility model.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0004] In view of the problems in the prior art, the purpose of the utility model is to provide a stator core and a stator including the same. The stator core is formed by splicing a plurality of core blocks, and each layer of core blocks is snap-connected by a mortise and tenon structure. It has the advantages of simple structure, easy installation, resistance to vibration and mechanical shock, etc.

[0005] A first aspect of the utility model provides a stator core, comprising a plurality of stacked segment rings;

[0006] The segment ring includes a plurality of core segments;

[0007] The core block comprises at least one tooth portion and a bottom portion connected to the at least one tooth portion, and an end surface of the bottom portion facing away from the tooth portion is arc-shaped;

[0008] The bottoms of the plurality of core segments are connected end to end around the axis of the stator core and the arc-shaped end surfaces of the plurality of bottoms form the circumference of the segment ring, and two adjacent teeth form stator slots on the radial inner surface of the stator core;

[0009] Each of the core blocks is connected to the core blocks of an adjacent layer through at least one mortise and tenon structure.

[0010] According to the first aspect of the utility model, the mortise and tenon structure is obtained by stamping.

[0011] According to the first aspect of the utility model, the core block includes only one tooth portion and the tooth portion is a symmetrical structure.

[0012] According to the first aspect of the utility model, the mortise and tenon structure is located on the symmetry axis of the tooth portion.

[0013] According to the first aspect of the utility model, the teeth and the bottom of the core block are T-shaped.

[0014] According to the first aspect of the utility model, the teeth and the bottom of the core block are L-shaped.

[0015] According to a first aspect of the utility model, the core block comprises a first surface and a second surface;

[0016] The first surfaces of the plurality of core segments of one segment ring are in contact with the second surfaces of the plurality of core segments of the segment ring in an adjacent layer.

[0017] According to the first aspect of the utility model, the thickness of the core segment is between 0.2 mm and 0.5 mm, and / or the number of segment rings included in the stator core is between 100 and 500.

[0018] According to the first aspect of the utility model, the segment ring includes 24 to 40 core segments.

[0019] According to the first aspect of the utility model, each of the core blocks is formed by stacking a plurality of core sheets.

[0020] A second aspect of the utility model provides a stator, comprising the stator core.

[0021] The stator core of the utility model is formed by splicing a plurality of core blocks, and each layer of core blocks is connected by a mortise and tenon structure. The stator core structure can withstand stronger vibration and mechanical impact; at the same time, the outer steel ring and the top side pressure cover of the existing stator core are omitted; in addition, the structure of a single core block is simple, and each core block is easy to assemble, which greatly reduces the processing cost and assembly cost of the stator core. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0023] Figure 1 This is a schematic structural diagram of a stator core according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic structural diagram of an iron core block according to an embodiment of the utility model;

[0025] Figure 3 A top view of an iron core block according to an embodiment of the utility model;

[0026] Figure 4 A schematic diagram of the top view of the structure of two adjacent layers of core blocks after splicing in one embodiment of the utility model; and

[0027] Figure 5 It is a schematic diagram of the structure of multi-layer core blocks after splicing according to one embodiment of the utility model. DETAILED DESCRIPTION

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the utility model will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and should not be construed as limitations on the utility model. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0029] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0032] In view of the existing technical problems, the utility model provides a stator core and a stator including the same, wherein the stator core comprises a plurality of stacked block rings; the block ring comprises a plurality of core blocks; the core block comprises at least one tooth portion and a bottom portion connected to the at least one tooth portion, and the end face of the bottom portion facing away from the tooth portion is arc-shaped; the bottoms of the plurality of core blocks are spliced ​​and the arc-shaped end faces of the plurality of bottom portions form the circumference of the block ring, and two adjacent teeth portions form radial inner surface grooves of the stator core; each core block is connected to the core blocks of the adjacent layer by at least one mortise and tenon structure. The stator core of the utility model is formed by splicing a plurality of core blocks, and the core blocks of each layer are connected by the mortise and tenon structure, and the stator core structure can withstand stronger vibration and mechanical shock; at the same time, the outer steel ring and the top side pressure cover of the existing stator core are omitted; in addition, the structure of a single core block is simple, and each core block is easy to assemble, which greatly reduces the processing cost and assembly cost of the stator core.

[0033] The structure of the stator core and the stator including the same of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It can be understood that the various specific embodiments are not intended to limit the protection scope of the present invention.

[0034] The stator core includes a plurality of stacked block rings; the block rings include a plurality of core blocks. Each core block is stacked by a plurality of core sheets, the core block includes at least one tooth portion and a bottom portion connected to the at least one tooth portion, and the end surface of the bottom portion away from the tooth portion is arc-shaped. The core block may have an arc-shaped bottom portion and a tooth portion or multiple teeth portions on the bottom portion. Figure 1 and Figure 2 The schematic diagrams of the structure of the stator core and its core blocks of an embodiment of the utility model are respectively, wherein each core block 1 includes only one tooth portion 11 and a bottom portion 12 connected to the tooth portion 11, and the bottom portions 12 of the multiple core blocks 1 are connected end to end around the axis of the stator core, and the arc-shaped end faces of the multiple bottom portions form the circumference of a block ring. The number of core blocks included in a block ring can be between 24 and 40. For example, a block ring includes 36 core blocks 1, and the arc of the bottom portion 12 of the core block 1 is 1 / 36 of the circumference formed by the 36 core blocks 1, and the curvature of the arc is the curvature of the circumference formed by the 36 bottom portions. Multiple block rings are stacked, and the tooth portions 11 of the multiple layer block rings are overlapped, and two adjacent tooth portions 11 form stator slots C on the radial inner surface of the stator core.

[0035] The thickness of the core block or a single stator onion piece of the utility model is between 0.2 mm and 0.5 mm, and the number of the block rings included in the stator core can be between 100 and 500. Accordingly, the thickness of the obtained stator core is between 50 mm and 100 mm. In some embodiments, the mortise and tenon structure connecting each core block with the core blocks of the adjacent layer can be obtained by stamping. Specifically, the hydraulic pressure of a hydraulic press can be used to stamp multiple stacked block rings. Under the constraint of the mold cavity, the stacked block rings form mortise and tenon structures on the contact surfaces of two core blocks of the adjacent layer. The mortise and tenon structure can be formed on the teeth or bottom of the core block. The stator core of the utility model is composed of core blocks spliced ​​into block rings, and each block ring is then fixed by stacking the mortise and tenon structures obtained by stamping, wherein a single core block has a simple structure, and the assembly of multiple core blocks simplifies the processing and assembly difficulty of the stator core, which is beneficial to improving the assembly efficiency of the stator core, and further beneficial to reducing the production cost of the product. Furthermore, the size of a single core sheet of the core block is small, and it can be obtained by processing the stamping waste of the rotor core, which greatly reduces the cost of raw materials. In addition, since the structure of a single core block is simple, the processing accuracy of the upper teeth can be improved, and accordingly, the roundness of the inner circumference of the spliced ​​stator core is improved, and accordingly, the air gap of the rotor can be well maintained, thereby improving the efficiency of the motor.

[0036] Figure 3 for Figure 2 The top view of the core block of the embodiment shows that the tooth portion 11 and the bottom 12 of the core block 1 are L-shaped, that is, the core block includes a tooth portion that is a symmetrical structure, and the axis of symmetry is XX', and the bottom 12 of the core block is not symmetrical about the XX' axis, that is, the length of the bottom on one side of the XX' axis is greater than the length of the bottom on the other side.

[0037] In some other embodiments, the tooth portion and the bottom of the core block may be T-shaped, that is, if the core block includes a tooth portion and the tooth portion is a symmetrical structure, the bottom of the T-shape is symmetrical about the symmetry axis of the tooth portion. The advantage of this structure is that the orientation of the bottom does not need to be considered during splicing.

[0038] Figure 3 There are many ways to splice the L-shaped core blocks of the embodiment into the stator core, such as stacking the blocks in adjacent layers with the long sides of the bottom 12 facing the same direction, or Figure 1 As shown in the embodiment, the long sides of the bottom 12 of the block rings of adjacent layers face opposite to each other, that is, the two surfaces of the core blocks are respectively defined as the first surface and the second surface, then the first surfaces of the multiple core blocks 1 of the block ring of the upper layer are in contact with the second surfaces of the multiple core blocks 1' of the block ring of the adjacent layer (lower layer). Figure 4This is a top view of the structure of two adjacent layers of core blocks after being spliced ​​together according to an embodiment of the utility model. Compared with the L-shaped core block 1 of the upper block ring, the L-shaped core block 1' of the lower block ring is flipped 180° along the center axis of the tooth.

[0039] Figure 5 This is a schematic diagram of the structure of multi-layer core blocks after splicing according to an embodiment of the utility model. It can be seen that the upper and lower core blocks in contact with each other in two adjacent layer block rings are tooth-shaped meshing, which increases the stability and overall strength of the stator core obtained after splicing.

[0040] Furthermore, in order to further enhance the strength of the stator core after splicing, the mortise and tenon structure formed by stamping is located on the symmetry axis of the tooth portion, as shown by the mark A in the accompanying drawings. In some other embodiments, multiple mortise and tenon structures A may be stamped. The position and number of the mortise and tenon structures may be set according to the structure and application scenario of the specific stator core.

[0041] The utility model also provides a stator, including the stator core. The stator structure is conducive to automated production and improves the overall performance of the motor.

[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0043] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A stator core, characterized in that: including a plurality of puzzle rings arranged in a stacked manner; The segment ring includes a plurality of core segments; The core block comprises at least one tooth portion and a bottom portion connected to the at least one tooth portion, and the end surface of the bottom portion away from the tooth portion is arc-shaped. The bottoms of the plurality of core segments are connected end to end around the axis of the stator core and the arc-shaped end surfaces of the plurality of bottoms form the circumference of the segment ring, and two adjacent teeth form stator slots on the radial inner surface of the stator core; Each of the core blocks is connected to the core blocks of an adjacent layer through at least one mortise and tenon structure.

2. The stator core according to claim 1, characterized in that: The mortise and tenon structure is obtained by stamping.

3. The stator core according to claim 1, characterized in that: The core block includes only one tooth portion and the tooth portion is a symmetrical structure.

4. The stator core according to claim 3, characterized in that: The mortise and tenon structure is located on the symmetry axis of the tooth portion.

5. The stator core according to claim 3, characterized in that: The teeth and the bottom of the core block are T-shaped.

6. The stator core according to claim 3, characterized in that: The teeth and the bottom of the core block are L-shaped.

7. The stator core according to claim 6, characterized in that: The core block comprises a first surface and a second surface; The first surfaces of the plurality of core segments of one segment ring are in contact with the second surfaces of the plurality of core segments of the segment ring in an adjacent layer.

8. The stator core according to claim 1, characterized in that: The thickness of the core segments is between 0.2 mm and 0.5 mm, and / or the number of the segment rings included in the stator core is between 100 and 500.

9. The stator core according to claim 1, characterized in that: The segment ring includes 24 to 40 core segments.

10. The stator core according to claim 1, characterized in that: Each of the core blocks is formed by stacking a plurality of core sheets.

11. A stator, characterized in that: The stator core comprises the stator core according to any one of claims 1 to 10.

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