Stator cores, motors, compressors and refrigeration equipment

Abstract

The present application provides a stator core, a motor, a compressor and a refrigeration device, wherein the stator core includes a plurality of core blocks, the plurality of core blocks are spliced ​​to form a rotor cavity, each of the plurality of core blocks includes a plurality of magnetic conductive sheets stacked along the axial direction of the rotor cavity, each magnetic conductive sheet includes a stator yoke and a stator tooth, a first riveted portion is provided on the stator yoke, and the first riveted portions of adjacent magnetic conductive sheets among the plurality of magnetic conductive sheets are connected; the stator teeth are connected to the stator yoke, and the stator teeth are arranged near the center of the rotor cavity relative to the stator yoke, a second riveted portion is provided on the stator teeth, and the second riveted portions of adjacent magnetic conductive sheets among the plurality of magnetic conductive sheets are connected; wherein the riveting bonding force of the second riveted portion is different from the riveting bonding force of the first riveted portion, so that the riveted structure is adapted to the force at different positions of the magnetic conductive sheet, which can improve the overall accuracy of the core blocks formed by stacking the plurality of magnetic conductive sheets, thereby ensuring the overall accuracy of the stator core and improving the manufacturability of the motor.

Description

Technical Field

[0001] The present application relates to the field of stator technology, and in particular to a stator core, a motor, a compressor, and a refrigeration device. Background Art

[0002] At present, the segmented stator core is composed of single core blocks spliced ​​together. A single core block is made by stacking multiple punching sheets. After stacking, a certain fixing method is adopted to form a core block with a certain strength. However, the current fixing method affects the accuracy of the stacked punching sheets, resulting in the problem that the subsequent motor cannot be manufactured. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present application is to provide a stator core.

[0005] A second aspect of the present application is to provide an electric motor.

[0006] A third aspect of the present application is to provide a compressor.

[0007] A fourth aspect of the present application is to provide a refrigeration device.

[0008] In view of this, according to the first aspect of the present application, a stator core is provided, which includes a plurality of core blocks, and the plurality of core blocks are spliced ​​to form a rotor cavity, each of the plurality of core blocks includes a plurality of magnetic conductive sheets stacked along the axial direction of the rotor cavity, each magnetic conductive sheet includes a stator yoke and a stator tooth, and a first riveted portion is provided on the stator yoke, and the first riveted portions of adjacent magnetic conductive sheets among the plurality of magnetic conductive sheets are connected; the stator teeth are connected to the stator yoke, and the stator teeth are arranged close to the center of the rotor cavity relative to the stator yoke, and a second riveted portion is provided on the stator teeth, and the second riveted portions of adjacent magnetic conductive sheets among the plurality of magnetic conductive sheets are connected; wherein the riveting bonding force of the first riveted portion is greater than the riveting bonding force of the second riveted portion.

[0009] The stator core provided in the present application is a block core, which includes a plurality of core blocks. The plurality of core blocks are spliced ​​end to end in sequence to form an integral stator core. The plurality of core blocks can be spliced ​​together to form a rotor cavity, which is used to accommodate the rotor of the motor. The rotor cavity is located in the middle of the stator core, that is, the stator core can be an outer stator, and the rotor is arranged on the inner side of the stator core. The rotor cavity is arranged through the axial direction. Each core block includes a plurality of magnetic conductive sheets, and the plurality of magnetic conductive sheets are stacked along the axial direction. That is, during the production and preparation of the stator core, the core blocks can be processed separately, and then the plurality of core blocks are spliced ​​together to form the stator core. For each magnetic conductive sheet, there are connected stator yokes and stator teeth. The stator yoke is arranged away from the center of the rotor cavity relative to the stator teeth, that is, the stator yoke is arranged outside and the stator teeth are arranged inside. The splicing of multiple stator yokes can form the outer periphery of the stator core. The stator yoke is provided with a first riveted portion, and the stator teeth are provided with a second riveted portion. For an iron core block, when multiple magnetic conductive sheets are stacked, the stator yokes of adjacent magnetic conductive sheets are stacked, that is, the first riveted portions on adjacent stator yokes are riveted together, and the stator teeth of adjacent magnetic conductive sheets are stacked, that is, the second riveted portions on adjacent stator teeth are riveted together. In other words, corresponding fixing structures are provided for the stator yoke and stator teeth, respectively, to ensure the overall connection stability of the magnetic conductive sheets. Furthermore, the riveted bonding forces of the first riveted portion and the second riveted portion are different, that is, different positions of the magnetic conductive sheet are subjected to different forces, thereby setting corresponding riveted bonding forces, that is, the first riveted portion and the second riveted portion are different types of riveted structures, so that the overall precision of the iron core block formed after the multiple magnetic conductive sheets are stacked is higher, ensuring the subsequent assembly of the stator core in the motor and improving the manufacturability of the motor.

[0010] In the present application, different first rivet parts and second rivet parts are respectively set at the stator yoke and the stator teeth, so that the fixed structure is adapted to the forces at different positions of the magnetic conductive sheet, thereby improving the overall accuracy of the core block formed by stacking multiple magnetic conductive sheets, thereby ensuring the overall accuracy of the stator core and improving the manufacturability of the motor.

[0011] It should be noted that the riveting bonding forces of the first riveted portion and the second riveted portion are different, and the riveting force of a single first riveted portion is different from the riveting force of a single second riveted portion.

[0012] In a possible design, further, the riveting bonding force of the first riveted portion is greater than the riveting bonding force of the second riveted portion.

[0013] In this design, the riveting force of the first riveted part located at the stator yoke is greater than the riveting force of the second riveted part located at the stator teeth. Since the stator yoke is arranged outward relative to the stator teeth, when the riveting force of the first riveted part is greater than the riveting force of the second riveted part, the dimensional accuracy of the entire stator core in the circumferential direction can be effectively guaranteed, thereby ensuring the accuracy of multiple core blocks after splicing to form a complete stator core, and ensuring the assemblability of the stator core in the motor.

[0014] It should be noted that in order to obtain different riveting bonding forces between the first riveted portion and the second riveted portion, parameters such as the riveting depth and the riveting area of ​​the first riveted portion and the second riveted portion may be adjusted.

[0015] In one possible design, the stator yoke further includes a yoke inner edge line and a yoke outer edge line located on the axial end surface, the yoke inner edge line being positioned closer to the rotor cavity relative to the yoke outer edge line, a yoke dividing line being defined between the yoke inner edge line and the yoke dividing line, and the first rivet portion being located between the yoke outer edge line and the yoke dividing line. The distance between the yoke inner edge line and the yoke dividing line is X, and the minimum width of the stator yoke in a direction parallel to the centerline of the stator teeth is Y, satisfying the condition X≤0.4Y.

[0016] In this design, the stator yoke includes a yoke inner edge line and a yoke outer edge line, wherein the yoke inner edge line and the yoke outer edge line are located in the same plane, which is a plane perpendicular to the axial direction. The yoke inner edge line is arranged toward the center of the rotor cavity, and a portion of the yoke inner edge line is in contact with the stator teeth. For the stator yoke, it has a yoke inner edge surface facing the stator teeth, a portion of the stator teeth is arranged on the yoke inner edge surface, and the yoke inner edge line is located within the yoke inner edge surface. When the yoke inner edge surface is an axially extending plane, the yoke inner edge line is a straight line. The first riveted portion is located on the side of the yoke dividing line facing away from the rotor cavity, that is, the first riveted portion is located outside the yoke dividing line. At this time, the determination of the yoke dividing line is related to the minimum width of the stator yoke. When the minimum width of the stator yoke is Y, the distance between the inner edge line of the yoke and the yoke dividing line is X, and the two satisfy the above relationship. The inner edge line of the yoke and the yoke dividing line are parallel in the axial end face, that is, the yoke dividing line can be obtained by translating the inner edge line outward by a distance of 0.4Y. The first riveted part is located on the outside of the stator yoke, so that the accuracy of the outer circle can be further controlled to ensure the accuracy of the final core block.

[0017] It should be noted that the stator yoke is similar to an arc structure, and multiple arc-shaped stator yokes are spliced ​​together to form a circular ring shape, and the width direction of the stator yoke is parallel to the center line of the stator teeth.

[0018] In other words, when the minimum width of the stator yoke is Y, the inner edge line of the yoke close to the center of the rotor cavity is translated 0.4Y toward the outer edge line of the yoke to obtain the yoke dividing line, and the first rivet portion is arranged in the area formed by the yoke dividing line and the yoke outer edge line.

[0019] In a possible design, further, a center point of the second riveted portion is arranged offset from a center line of the stator tooth.

[0020] In this design, the center point of the second rivet portion on the stator tooth is set away from the center line of the stator tooth, that is, the second rivet portion is eccentrically arranged on the stator tooth, thereby minimizing the loss of the tooth portion. While ensuring excellent motor precision, the minimum motor loss is obtained, ensuring a smaller degree of electromagnetic efficiency attenuation of the motor.

[0021] It should be noted that if a riveted structure is placed at the centerline of the stator teeth, it will increase the eddy current loss of the motor and reduce the motor efficiency. However, the present application sets the second riveted portion off the centerline of the stator teeth, which not only achieves the function of fixed connection, but also minimizes eddy current loss and ensures the efficiency of the motor.

[0022] The rotor cavity has a central axis, and the center line of the stator teeth passes through the central axis of the rotor cavity.

[0023] In one possible design, further, the stator tooth includes a tooth root and a tooth shoe, the first end of the tooth root is connected to the stator yoke, and the tooth shoe is arranged at the second end of the tooth root, wherein the central symmetry line of the tooth root is the center line of the stator tooth, and the second rivet portion is arranged on the tooth root.

[0024] In this design, the stator teeth consist of tooth roots and tooth boots. The tooth roots are regularly shaped, such as rectangular. The first end of the tooth root is connected to the stator yoke, and the second end is provided with a tooth boot. The stator winding is primarily wound on the tooth root. Winding slots are formed circumferentially between adjacent stator teeth. The tooth boots are located at the openings of these slots, preventing the stator winding from escaping. The tooth root's central symmetry line, which passes through the central axis of the rotor cavity, defines the stator tooth's centerline. The second rivet is located on the tooth root. The tooth root area is larger than the tooth boot, allowing for multiple optional positions for the second rivet, increasing flexibility and freedom in its placement. Furthermore, placing the second rivet on the tooth root prevents the second rivet from being too far from the first. By defining a boundary line in the yoke, the first and second rivets are prevented from being too close together, ensuring that the first and second rivets are appropriately spaced apart on the stator yoke and stator teeth, thereby providing reliable connectivity for the entire magnetic conductive sheet.

[0025] It is worth noting that there are two tooth shoes, which are distributed on different sides of the tooth root. One tooth shoe is located on one side of the tooth root circumferentially, and the other tooth shoe is located on the other side of the tooth root circumferentially. The two tooth shoes can be symmetrically distributed relative to the central symmetry line of the tooth root, thereby improving the overall symmetry of the stator core and ensuring the efficiency of the motor.

[0026] In a possible design, further, in a direction perpendicular to the center line of the stator tooth, the width of the tooth root is M, and the distance between the center point of the second riveted portion and the central symmetry line of the tooth root is N, wherein 0.01M≤N≤0.4M.

[0027] In this design, the width of the tooth root in the direction perpendicular to the center line of the stator teeth is M, that is, the width direction of the stator yoke is different from the width direction of the tooth root, and the magnetic conductive sheet is generally in a "T" shape. The specific position of the second riveted portion is related to the width of the tooth root. Although the second riveted portion is set away from the central symmetry line of the tooth root, the center point of the second riveted portion and the central symmetry line of the tooth root have the aforementioned relationship, that is, the second riveted portion can be set away from the central symmetry of the tooth root within a certain range, so as to ensure the minimized loss of the stator teeth and effectively reduce the loss of the motor while ensuring excellent motor precision. If the second riveted portion is set at the edge of the tooth root away from the central symmetry line of the tooth root, the second riveted portion cannot provide an effective connection for the stator tooth position, and cannot reduce the loss.

[0028] It should be noted that the second riveted portion is arranged in the middle of the tooth root in the length direction of the tooth root, so that the tooth root can obtain a more uniform force and improve the structural stability.

[0029] In a possible design, further, there are multiple first rivet portions, and the multiple first rivet portions are distributed on different sides of a center line of the stator tooth.

[0030] In this design, there are multiple first riveted parts on the stator yoke, and the multiple first riveted parts are distributed on different sides of the center line of the stator teeth. Since the second riveted parts are arranged close to the center line of the stator teeth, the multiple first riveted parts and the second riveted parts can form a polygon, such as a triangle, a quadrilateral, etc., which can make the riveting effect on the magnetic conductive sheet more uniform.

[0031] Specifically, when the number of the first riveted parts is two, one first riveted part is arranged on one side of the center line of the stator tooth, and the other first riveted part and the second riveted part are arranged on the other side of the center line of the stator tooth, then the three can form a stable triangle, and the triangular area occupies the central area of ​​the entire magnetic conductive sheet. At this time, the riveting force exerted on the magnetic conductive sheet is more stable and effective.

[0032] In a possible design, further, the plurality of first rivet portions are symmetrically distributed along a center line of the stator tooth.

[0033] In this design, multiple first riveted parts are symmetrically arranged on the stator yoke, so that symmetrical riveting forces can be obtained at the positions of the stator yoke, thereby ensuring the overall accuracy of the stator core and the efficiency of the motor.

[0034] In a possible design, further, a third riveted portion is provided on the stator yoke, and the first riveted portion and the third riveted portion are distributed on different sides of the center line of the stator teeth.

[0035] In this design, the magnetic sheet is provided with a first riveted portion, a second riveted portion, and a third riveted portion. The first and third riveted portions provide a reliable connection to the stator yoke, while the second riveted portion provides a reliable connection to the stator teeth. Because the third riveted portion and the first riveted portion are located on different sides of the centerline of the stator teeth, the first, second, and third riveted portions form a stable triangle, with the triangle occupying the center of the entire magnetic sheet. In this case, the riveting force applied to the magnetic sheet is more stable and effective. The riveted bonding force of the third riveted portion is greater than or equal to that of the first riveted portion.

[0036] In a possible design, further, the riveting bonding force of the third riveted portion is the same as the riveting bonding force of the second riveted portion.

[0037] In this design, when the riveting bonding force of the third riveted part is equal to the riveting bonding force of the second riveted part, the third riveted part and the second riveted part can be prepared using the same riveting process, that is, for the processing of the riveted structure on the magnetic conductive sheet, two riveting processes can be used, that is, the first riveting process is used to process the first riveted part on the stator yoke, and the second riveting process is used to process the second riveted part on the stator tooth. At the same time, the third riveted part can be processed on the stator yoke to simplify the processing process.

[0038] In a possible design, further, the center of the first riveted portion and the center of the third riveted portion are symmetrically distributed relative to the center line of the stator tooth.

[0039] In this design, the first riveted part and the third riveted part are symmetrically arranged on the stator yoke, so that symmetrical riveting forces can be obtained at the stator yoke position, ensuring the overall accuracy of the stator core and the efficiency of the motor.

[0040] According to a second aspect of the present application, a motor is provided, comprising a stator core provided by any of the above designs.

[0041] The motor provided in this application includes the stator core provided by any of the above designs, and therefore has all the beneficial effects of the stator core, which will not be repeated here.

[0042] In one possible design, the motor further includes a rotor, which is located within a rotor cavity of the stator core and is rotatable relative to the stator core. A direction from a centerline of a stator tooth of the stator core toward the second riveted portion of the stator core is a deviation direction, wherein the deviation direction is opposite to a rotational direction of the rotor.

[0043] In this design, the motor also includes a rotor housed within a rotor cavity formed by the stator core. The rotor and stator core are clearance-fitted, allowing the rotor to rotate relative to the stator core. When the second riveted portion is offset from the centerline of the stator teeth, the direction from the stator centerline toward the second riveted portion is the offset direction of the second riveted portion. This offset direction is opposite to the direction of rotation of the rotor. That is, when the rotor rotates counterclockwise, the second riveted portion is located clockwise from the centerline of the stator teeth.

[0044] According to a third aspect of the present application, a compressor is provided, comprising a motor provided by any of the above designs.

[0045] The compressor provided in this application includes the motor provided by any of the above designs, and therefore has all the beneficial effects of the motor, which will not be repeated here.

[0046] According to a fourth aspect of the present application, a refrigeration device is provided, comprising a motor or a compressor provided by any of the above designs.

[0047] The refrigeration equipment provided in this application includes the motor or compressor provided by any of the above designs, and therefore has all the beneficial effects of the motor or compressor, which will not be repeated here.

[0048] Additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0050] Figure 1 A schematic structural diagram of a magnetic conductive sheet in a stator core according to an embodiment of the present application is shown;

[0051] Figure 2 A schematic structural diagram of a stator core according to an embodiment of the present application is shown;

[0052] Figure 3 A schematic structural diagram of a magnetic conductive sheet in a stator core according to another embodiment of the present application is shown;

[0053] Figure 4 FIG2 shows a schematic structural diagram of a magnetic conductive sheet in a stator core according to another embodiment of the present application;

[0054] Figure 5 FIG2 shows a schematic structural diagram of a magnetic conductive sheet in a stator core according to another embodiment of the present application;

[0055] Figure 6A graph comparing the distance between the second riveted portion on the magnetic conductive sheet and the center line of the stator teeth and the loss of the stator teeth according to one embodiment of the present application is shown;

[0056] Figure 7 shows a schematic structural diagram of a motor according to an embodiment of the present application;

[0057] Figure 8 A schematic structural diagram of a compressor according to an embodiment of the present application is shown.

[0058] Reference numerals:

[0059] 100 stator core,

[0060] 100a iron core block, 100b rotor cavity, 100c magnetic conductive sheet,

[0061] 110 stator yoke, 111 first riveted portion, 112 third riveted portion,

[0062] 120 stator teeth, 121 second riveted portion, 122 tooth root, 123 tooth shoe,

[0063] 200 motors,

[0064] 210 rotor, 211 rotor core, 212 magnet,

[0065] 220 stator winding,

[0066] 300 compressor, 310 power unit, 320 shaft. DETAILED DESCRIPTION

[0067] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0068] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0069] Refer to the following Figures 1 to 8 The stator core 100 , the motor 200 , the compressor 300 , and the refrigeration device provided according to some embodiments of the present application are described.

[0070] According to a first aspect of the present application, a stator core 100 is provided, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, it includes a plurality of core blocks 100a, which are spliced ​​to form a rotor cavity 100b. Each core block 100a in the plurality of core blocks 100a includes a plurality of magnetic conductive sheets 100c stacked axially along the rotor cavity 100b. Each magnetic conductive sheet 100c includes a stator yoke 110 and a stator tooth 120. The stator yoke 110 is provided with a first riveted portion 111, and the first riveted portions 111 of adjacent magnetic conductive sheets 100c in the plurality of magnetic conductive sheets 100c are connected; the stator teeth 120 are connected to the stator yoke 110, and the stator teeth 120 are arranged near the center of the rotor cavity 100b relative to the stator yoke 110. The stator teeth 120 are provided with a second riveted portion 121, and the second riveted portions 121 of adjacent magnetic conductive sheets 100c in the plurality of magnetic conductive sheets 100c are connected; wherein the riveting bonding force of the first riveted portion 111 is greater than the riveting bonding force of the second riveted portion 121.

[0071] The stator core 100 provided in the present application is a segmented core. The stator core 100 includes a plurality of core blocks 100a. The plurality of core blocks 100a are sequentially spliced ​​end to end to form a whole stator core 100. The plurality of core blocks 100a are spliced ​​together to form a rotor cavity 100b. The rotor cavity 100b is used to accommodate the rotor 210 of the motor 200. The rotor cavity 100b is located in the middle of the stator core 100. That is, the stator core 100 can be an outer stator, and the rotor 210 is arranged on the inner side of the stator core 100. The rotor cavity 100b is arranged to pass through in the axial direction. Each core block 100a includes a plurality of magnetic conductive sheets 100c, and the plurality of magnetic conductive sheets 100c are stacked in the axial direction. That is, during the production and preparation process of the stator core 100, the core blocks 100a can be processed separately, and then the plurality of core blocks 100a are spliced ​​together to form the stator core 100. For each magnetic conductive sheet 100c, it has a connected stator yoke 110 and stator teeth 120. The stator yoke 110 is arranged away from the center of the rotor cavity 100b relative to the stator teeth 120, that is, the stator yoke 110 is arranged outside and the stator teeth 120 are arranged inside. Multiple stator yokes 110 can be spliced ​​together to form the outer periphery of the stator core 100. Among them, a first riveted portion 111 is provided on the stator yoke 110, and a second riveted portion 121 is provided on the stator teeth 120. For an iron core block 100a, when multiple magnetic conductive sheets 100c are stacked, the stator yokes 110 of adjacent magnetic conductive sheets 100c are stacked, that is, the first riveted portions 111 on adjacent stator yokes 110 are riveted together, and the stator teeth 120 of adjacent magnetic conductive sheets 100c are stacked, that is, the second riveted portions 121 on adjacent stator teeth 120 are riveted together. In other words, corresponding fixing structures are respectively provided for the stator yoke 110 and the stator teeth 120, so as to ensure the overall connection stability of the magnetic conductive sheets 100c. Furthermore, the first riveted portion 111 and the second riveted portion 121 have different riveting forces, that is, different positions of the magnetic conductive sheet 100c are subjected to different forces, thereby setting corresponding riveted forces, that is, the first riveted portion 111 and the second riveted portion 121 are riveted structures of different types, so that the overall precision of the core block 100a formed after multiple magnetic conductive sheets 100c are stacked is higher, ensuring the subsequent assembly of the stator core 100 in the motor 200 and improving the manufacturability of the motor 200.

[0072] In the present application, different first rivet parts 111 and second rivet parts 121 are respectively provided at the stator yoke 110 and the stator teeth 120, so that the fixing structure is adapted to the forces at different positions of the magnetic conductive sheet 100c, thereby improving the overall accuracy of the core block 100a formed by stacking multiple magnetic conductive sheets 100c, thereby ensuring the overall accuracy of the stator core 100 and improving the manufacturability of the motor 200.

[0073] It should be noted that the riveting bonding forces of the first riveted portion 111 and the second riveted portion 121 are different, and the riveting force of a single first riveted portion 111 is different from the riveting force of a single second riveted portion 121 .

[0074] Furthermore, the riveting strength of the first riveted portion 111 is greater than the riveting strength of the second riveted portion 121 .

[0075] In this embodiment, the riveting force of the first riveted portion 111 located at the stator yoke 110 is greater than the riveting force of the second riveted portion 121 located at the stator teeth 120. Since the stator yoke 110 is arranged outward relative to the stator teeth 120, when the riveting force of the first riveted portion 111 is greater than the riveting force of the second riveted portion 121, the dimensional accuracy of the entire stator core 100 in the circumferential direction can be effectively guaranteed, thereby ensuring the accuracy of multiple core blocks 100a after splicing to form a complete stator core 100, and ensuring the assemblability of the stator core 100 in the motor 200.

[0076] It should be noted that in order to obtain different riveting bonding forces between the first riveted portion 111 and the second riveted portion 121 , parameters such as the riveting depth and the riveting area of ​​the first riveted portion 111 and the second riveted portion 121 may be adjusted.

[0077] Among them, regarding the method of measuring the riveting bonding force of the first riveted part 111 and the second riveted part 121, the stator core 100 can be cut to form a yoke core block and a tooth core block, and then the riveting force of multiple magnetic conductive sheets in the yoke core block and the tooth core block can be measured respectively.

[0078] For the yoke core block, it is fixedly placed on a platform and axially divided into a bottom core and a top core, with the bottom core fixedly connected to the platform. A tensile testing machine is then fixedly connected to the top core. Once activated, the tensile testing machine can drive the top core in a vertically upward direction. When the top and bottom cores separate, the tensile testing machine measures the pull-out force applied at the moment of separation. This pull-out force is the riveted bond strength between the first riveted joints between adjacent magnetic conductive sheets between the bottom and top cores. For the tooth core block, the riveted bond strength between the second riveted joints on two adjacent magnetic conductive sheets is achieved in the same manner.

[0079] Furthermore, if Figure 1As shown, the stator yoke 110 includes a yoke inner edge line E1 and a yoke outer edge line E2 located on the axial end surface. The yoke inner edge line E1 is located closer to the rotor cavity 100b than the yoke outer edge line E2. A yoke dividing line E3 is defined between the yoke inner edge line E1 and the yoke outer edge line E2. The first rivet 111 is located between the yoke outer edge line E2 and the yoke dividing line E3. The distance between the yoke inner edge line E1 and the yoke dividing line E3 is X. The minimum width of the stator yoke 110 in a direction parallel to the centerline O of the stator tooth 120 is Y, satisfying the condition X≤0.4Y.

[0080] In this embodiment, the stator yoke 110 includes a yoke inner edge line E1 and a yoke outer edge line E2, wherein the yoke inner edge line E1 and the yoke outer edge line E2 are located in the same plane, which is a plane perpendicular to the axial direction. The yoke inner edge line E1 is arranged toward the center of the rotor cavity 100b, and a portion of the yoke inner edge line E1 contacts the stator teeth 120. The stator yoke 110 has a yoke inner edge surface facing the stator teeth 120, and a portion of the stator teeth 120 is arranged on the yoke inner edge surface, and the yoke inner edge line E1 is located within the yoke inner edge surface. When the yoke inner edge surface is an axially extending plane, the yoke inner edge line E1 is a straight line. The first rivet portion 111 is located on the side of the yoke dividing line E3 facing away from the rotor cavity 100b, that is, the first rivet portion 111 is located outside the yoke dividing line E3. At this time, the determination of the yoke dividing line E3 is related to the minimum width of the stator yoke 110. When the minimum width of the stator yoke 110 is Y, the distance between the yoke inner edge line E1 and the yoke dividing line E3 is X, and the two satisfy the above relationship. The yoke inner edge line E1 and the yoke dividing line E3 are parallel in the axial end face, that is, the yoke dividing line E3 can be obtained by translating the yoke inner edge line E1 outward by a distance of 0.4Y. The first rivet portion 111 is located on the outside of the stator yoke 110, so that the accuracy of the outer circle can be further controlled to ensure the accuracy of the final core block 100a.

[0081] It should be noted that the stator yoke 110 is similar to an arc structure. A plurality of arc-shaped stator yokes 110 are spliced ​​together to form a circular ring shape. The width direction of the stator yoke 110 is parallel to the center line O of the stator teeth 120 .

[0082] In other words, when the minimum width of the stator yoke 110 is Y, the yoke inner edge line E1 close to the center of the rotor cavity 100b is translated 0.4Y toward the yoke outer edge line E2 to obtain the yoke dividing line E3, and the first rivet portion 111 is arranged in the area formed by the yoke dividing line E3 and the yoke outer edge line E2.

[0083] Furthermore, if Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, the center point of the second rivet portion 121 is offset from the center line O of the stator tooth 120 .

[0084] In this embodiment, the center point of the second rivet portion 121 located on the stator tooth 120 is set away from the center line O of the stator tooth 120, that is, the second rivet portion 121 is eccentrically arranged on the stator tooth 120, so as to minimize the loss of the tooth portion. While ensuring the excellent precision of the motor 200, the minimum loss of the motor 200 is obtained, and the electromagnetic efficiency attenuation of the motor 200 is ensured to be smaller.

[0085] It should be noted that if a riveted structure is provided at the centerline O of the stator tooth 120, it will increase the eddy current loss of the motor 200 and reduce the efficiency of the motor 200. However, the present application arranges the second riveted portion 121 offset from the centerline O of the stator tooth 120, which not only achieves the effect of fixed connection, but also minimizes eddy current loss and ensures the efficiency of the motor 200.

[0086] The rotor cavity 100 b has a central axis, and the center line O of the stator tooth 120 passes through the central axis of the rotor cavity 100 b.

[0087] Furthermore, if Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, the stator tooth 120 includes a tooth root 122 and a tooth shoe 123, wherein the first end of the tooth root 122 is connected to the stator yoke 110, and the tooth shoe 123 is arranged at the second end of the tooth root 122, wherein the central symmetry line of the tooth root 122 is the center line O of the stator tooth 120, and the second rivet portion 121 is arranged on the tooth root 122.

[0088] In this embodiment, the stator tooth 120 includes a tooth root 122 and a tooth shoe 123. The tooth root 122 is regular in shape, such as a rectangle. The first end of the tooth root 122 is connected to the stator yoke 110, and the second end of the tooth root 122 is provided with a tooth shoe 123. The stator winding 220 is mainly wound on the tooth root 122, and winding slots are formed circumferentially between adjacent stator teeth 120. The tooth shoe 123 is located at the notch of the winding slot. The tooth shoe 123 can prevent the stator winding 220 from escaping from the winding slot. The central symmetry line of the tooth root 122 passing through the central axis of the rotor cavity 100b is the center line O of the stator tooth 120. The second rivet portion 121 is provided on the tooth root 122. The area of ​​the tooth root 122 is larger than the tooth shoe 123, which can provide a variety of optional positions for the second rivet portion 121, thereby improving the flexibility and freedom of setting the second rivet portion 121. Moreover, the second riveted portion 121 is arranged on the tooth root 122 to avoid the second riveted portion 121 and the first riveted portion 111 being too far apart. By setting a yoke boundary line, the first riveted portion 111 and the second riveted portion 121 can also be prevented from being too close, so that the first riveted portion 111 and the second riveted portion 121 are distributed at an appropriate distance on the stator yoke 110 and the stator teeth 120, thereby providing reliable connectivity for the magnetic conductive sheet 100c as a whole.

[0089] It is worth noting that there are two tooth boots 123, and the two tooth boots 123 are distributed on different sides of the tooth root 122. One tooth boot 123 is located on one side of the tooth root 122 in the circumferential direction, and the other tooth boot 123 is located on the other side of the tooth root 122 in the circumferential direction. The two tooth boots 123 can be symmetrically distributed relative to the central symmetry line of the tooth root 122, thereby improving the overall symmetry of the stator core 100, and thus ensuring the efficiency of the motor 200.

[0090] Furthermore, if Figure 1 As shown, in a direction perpendicular to the center line O of the stator tooth 120 , the width of the tooth root 122 is M, and the distance between the center point of the second rivet portion 121 and the central symmetry line of the tooth root 122 is N, wherein 0.01M≤N≤0.4M.

[0091] In this embodiment, the width of the tooth root 122 is M in a direction perpendicular to the centerline O of the stator tooth 120. This means that the width of the stator yoke 110 differs from the width of the tooth root 122, and the magnetic conductive sheet 100c is generally T-shaped. The specific position of the second rivet 121 is correlated with the width of the tooth root 122. Although the second rivet 121 is offset from the central symmetry line of the tooth root 122, the center point of the second rivet 121 maintains the aforementioned relationship with the central symmetry line of the tooth root 122. This means that the second rivet 121 can be offset from the central symmetry line of the tooth root 122 within a certain range to minimize losses in the stator tooth 120 and effectively reduce losses in the motor 200 while maintaining excellent precision. If the second rivet 121 is located at the edge of the tooth root 122, away from the central symmetry line of the tooth root 122, the second rivet 121 will not provide an effective connection at the stator tooth 120, nor will it reduce losses.

[0092] It should be noted that the second riveted portion 121 is provided at the middle of the tooth root 122 in the length direction of the tooth root 122 , so that the tooth root 122 can obtain a more uniform force, thereby improving the structural stability.

[0093] Furthermore, if Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, there are multiple first rivet portions 111 , and the multiple first rivet portions 111 are distributed on different sides of the center line O of the stator tooth 120 .

[0094] In this embodiment, there are multiple first riveted portions 111 on the stator yoke 110, and the multiple first riveted portions 111 are distributed on different sides of the center line O of the stator teeth 120. Since the second riveted portions 121 are arranged close to the center line O of the stator teeth 120, the multiple first riveted portions 111 and the second riveted portions 121 can form a polygon, such as a triangle, a quadrilateral, etc., which can make the riveting effect on the magnetic conductive sheet 100c more uniform.

[0095] Specifically, when the number of the first rivet parts 111 is two, one first rivet part 111 is arranged on one side of the center line O of the stator tooth 120, and the other first rivet part 111 and the second rivet part 121 are arranged on the other side of the center line O of the stator tooth 120, then the three can form a stable triangle, and the triangular area occupies the central area of ​​the entire magnetic conductive sheet 100c. At this time, the riveting force exerted on the magnetic conductive sheet 100c is more stable and effective.

[0096] Furthermore, if Figure 1 、 Figure 3 、 Figure 4 and Figure 5As shown, the plurality of first rivet portions 111 are symmetrically distributed along the center line O of the stator tooth 120 .

[0097] In this embodiment, the plurality of first rivet portions 111 are symmetrically arranged on the stator yoke 110 , so that symmetrical riveting forces can be obtained at the positions of the stator yoke 110 , thereby ensuring the overall accuracy of the stator core 100 and the efficiency of the motor 200 .

[0098] Furthermore, if Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, the stator yoke 110 is further provided with a third riveted portion 112 , and the first riveted portion 111 and the third riveted portion 112 are distributed on different sides of the center line O of the stator tooth 120 .

[0099] In this embodiment, the magnetic conductive sheet 100c is provided with a first rivet 111, a second rivet 121, and a third rivet 112. The first rivet 111 and the third rivet 112 can provide reliable connection performance for the stator yoke 110, and the second rivet 121 provides reliable connection performance for the stator teeth 120. Because the third rivet 112 and the first rivet 111 are located on different sides of the centerline of the stator teeth 120, the first rivet 111, the second rivet 121, and the third rivet 112 can form a stable triangle. The triangular area occupies the center area of ​​the entire magnetic conductive sheet 100c. In this case, the riveting force applied to the magnetic conductive sheet 100c is more stable and effective. The riveting bonding force of the third rivet 112 is greater than or equal to the riveting bonding force of the first rivet 111.

[0100] Furthermore, the riveting strength of the third riveting portion 112 is the same as the riveting strength of the second riveting portion 121 .

[0101] In this embodiment, when the riveting bonding force of the third riveted portion 112 is equal to the riveting bonding force of the second riveted portion 121, the third riveted portion 112 and the second riveted portion 121 can be prepared using the same riveting process, that is, for the processing of the riveted structure on the magnetic conductive sheet 100c, two riveting processes can be used, that is, the first riveting process is used to process the first riveted portion 111 on the stator yoke 110, and the second riveting process is used to process the second riveted portion 121 on the stator tooth 120. At the same time, the third riveted portion 112 can be processed on the stator yoke 110 to simplify the processing process.

[0102] Furthermore, the center of the first riveted portion 111 and the center of the third riveted portion 112 are symmetrically distributed relative to the center line O of the stator tooth 120 .

[0103] In this embodiment, the first riveted portion 111 and the third riveted portion 112 are symmetrically arranged on the stator yoke 110 , so that symmetrical riveting forces can be obtained at the positions of the stator yoke 110 , ensuring the overall accuracy of the stator core 100 and the efficiency of the motor 200 .

[0104] According to a second aspect of the present application, a motor 200 is provided, such as Figure 7 As shown, the stator core 100 includes any one of the above designs.

[0105] The motor 200 provided in the present application includes the stator core 100 provided by any of the above designs, and therefore has all the beneficial effects of the stator core 100, which will not be repeated here.

[0106] Furthermore, the motor 200 includes a rotor 210, which is located in the rotor cavity 100b of the stator core 100 and can rotate relative to the stator core 100. The direction from the center line O of the stator tooth 120 of the stator core 100 to the second rivet portion 121 of the stator core 100 is a deviation direction, wherein the deviation direction is opposite to the rotation direction of the rotor 210.

[0107] In this embodiment, the motor 200 further includes a rotor 210, which is accommodated in a rotor cavity 100b formed by the stator core 100. The rotor 210 and the stator core 100 are clearance-fitted, allowing the rotor 210 to rotate relative to the stator core 100. When the second rivet 121 is offset from the centerline O of the stator tooth 120, the direction from the centerline O of the stator tooth 120 toward the second rivet 121 is the offset direction of the second rivet 121. The offset direction is opposite to the rotation direction of the rotor 210. That is, when the rotor 210 rotates counterclockwise, the second rivet 121 is located on the clockwise side of the centerline of the stator tooth 120.

[0108] The rotor 210 includes a rotor core 211 and a magnet 212 embedded in the rotor core 211 .

[0109] According to the third aspect of this application, Figure 8 As shown, a compressor 300 is provided, including the motor 200 provided by any of the above designs.

[0110] The compressor 300 provided in the present application includes the motor 200 provided by any of the above designs, and therefore has all the beneficial effects of the motor 200, which will not be repeated here.

[0111] Among them, the compressor 300 also includes a rotating shaft 320 and a power unit 310. The rotating shaft 320 is arranged in the rotor 210, and the rotating shaft 320 is cooperatively connected with the rotor 210. The power unit 310 is connected to the rotating shaft 320. The power unit 310 is configured to drive the rotating shaft 320 to rotate, and then drive the rotor 210 to rotate.

[0112] The stator core 100 provided in the present application is a segmented core. The stator core 100 includes a plurality of core blocks 100a. The plurality of core blocks 100a are sequentially spliced ​​end to end to form a whole stator core 100. The plurality of core blocks 100a are spliced ​​together to form a rotor cavity 100b. The rotor cavity 100b is used to accommodate the rotor 210 of the motor 200. The rotor cavity 100b is located in the middle of the stator core 100. That is, the stator core 100 can be an outer stator, and the rotor 210 is arranged on the inner side of the stator core 100. The rotor cavity 100b is arranged to pass through in the axial direction. Each core block 100a includes a plurality of magnetic conductive sheets 100c, and the plurality of magnetic conductive sheets 100c are stacked in the axial direction. That is, during the production and preparation process of the stator core 100, the core blocks 100a can be processed separately, and then the plurality of core blocks 100a are spliced ​​together to form the stator core 100. For each magnetic conductive sheet 100c, it has a connected stator yoke 110 and stator teeth 120. The stator yoke 110 is arranged away from the center of the rotor cavity 100b relative to the stator teeth 120, that is, the stator yoke 110 is arranged outside and the stator teeth 120 are arranged inside. Multiple stator yokes 110 can be spliced ​​together to form the outer periphery of the stator core 100. Among them, a first riveted portion 111 is provided on the stator yoke 110, and a second riveted portion 121 is provided on the stator teeth 120. For an iron core block 100a, when multiple magnetic conductive sheets 100c are stacked, the stator yokes 110 of adjacent magnetic conductive sheets 100c are stacked, that is, the first riveted portions 111 on adjacent stator yokes 110 are riveted together, and the stator teeth 120 of adjacent magnetic conductive sheets 100c are stacked, that is, the second riveted portions 121 on adjacent stator teeth 120 are riveted together. In other words, corresponding fixing structures are respectively provided for the stator yoke 110 and the stator teeth 120, so as to ensure the overall connection stability of the magnetic conductive sheets 100c. Furthermore, the first riveted portion 111 and the second riveted portion 121 have different riveting forces, that is, different positions of the magnetic conductive sheet 100c are subjected to different forces, thereby setting corresponding riveted forces, that is, the first riveted portion 111 and the second riveted portion 121 are riveted structures of different types, so that the overall precision of the core block 100a formed after multiple magnetic conductive sheets 100c are stacked is higher, ensuring the subsequent assembly of the stator core 100 in the motor 200 and improving the manufacturability of the motor 200.

[0113] In the present application, different first rivet parts 111 and second rivet parts 121 are respectively provided at the stator yoke 110 and the stator teeth 120, so that the fixing structure is adapted to the forces at different positions of the magnetic conductive sheet 100c, thereby improving the overall accuracy of the core block 100a formed by stacking multiple magnetic conductive sheets 100c, thereby ensuring the overall accuracy of the stator core 100 and improving the manufacturability of the motor 200.

[0114] It should be noted that the riveting bonding forces of the first riveted portion 111 and the second riveted portion 121 are different, and the riveting force of a single first riveted portion 111 is different from the riveting force of a single second riveted portion 121 .

[0115] Furthermore, the riveting force of the first riveted portion 111 located at the stator yoke 110 is greater than the riveting force of the second riveted portion 121 located at the stator teeth 120. Since the stator yoke 110 is arranged outward relative to the stator teeth 120, when the riveting force of the first riveted portion 111 is greater than the riveting force of the second riveted portion 121, the dimensional accuracy of the entire stator core 100 in the circumferential direction can be effectively guaranteed, thereby ensuring the accuracy of multiple core blocks 100a after splicing to form a complete stator core 100, and ensuring the assemblability of the stator core 100 in the motor 200.

[0116] It should be noted that in order to obtain different riveting bonding forces between the first riveted portion 111 and the second riveted portion 121 , parameters such as the riveting depth and the riveting area of ​​the first riveted portion 111 and the second riveted portion 121 may be adjusted.

[0117] Furthermore, if Figure 1As shown, the stator yoke 110 includes a yoke inner edge line E1 and a yoke outer edge line E2, wherein the yoke inner edge line E1 and the yoke outer edge line E2 are located in the same plane, which is a plane perpendicular to the axial direction. The yoke inner edge line E1 is arranged toward the center of the rotor cavity 100b, and a portion of the yoke inner edge line E1 contacts the stator teeth 120. The stator yoke 110 has a yoke inner edge surface facing the stator teeth 120, and a portion of the stator teeth 120 is arranged on the yoke inner edge surface, and the yoke inner edge line E1 is located within the yoke inner edge surface. When the yoke inner edge surface is an axially extending plane, the yoke inner edge line E1 is a straight line. The first rivet portion 111 is located on the side of the yoke dividing line E3 facing away from the rotor cavity 100b, that is, the first rivet portion 111 is located outside the yoke dividing line E3. At this time, the determination of the yoke dividing line E3 is related to the minimum width of the stator yoke 110. When the minimum width of the stator yoke 110 is Y, the distance between the yoke inner edge line E1 and the yoke dividing line E3 is X, and the two satisfy the above relationship. The yoke inner edge line E1 and the yoke dividing line E3 are parallel in the axial end face, that is, the yoke dividing line E3 can be obtained by translating the yoke inner edge line E1 outward by a distance of 0.4Y. The first rivet portion 111 is located on the outside of the stator yoke 110, so that the accuracy of the outer circle can be further controlled to ensure the accuracy of the final core block 100a.

[0118] It should be noted that the stator yoke 110 is similar to an arc structure. A plurality of arc-shaped stator yokes 110 are spliced ​​together to form a circular ring shape. The width direction of the stator yoke 110 is parallel to the center line O of the stator teeth 120 .

[0119] In other words, when the minimum width of the stator yoke 110 is Y, the yoke inner edge line E1 close to the center of the rotor cavity 100b is translated 0.4Y toward the yoke outer edge line E2 to obtain the yoke dividing line E3, and the first rivet portion 111 is arranged in the area formed by the yoke dividing line E3 and the yoke outer edge line E2.

[0120] Furthermore, if Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the center point of the second rivet portion 121 located on the stator tooth 120 is set away from the center line O of the stator tooth 120, that is, the second rivet portion 121 is eccentrically arranged on the stator tooth 120, so as to minimize the loss of the tooth portion. While ensuring the excellent precision of the motor 200, the minimum loss of the motor 200 is obtained, and the electromagnetic efficiency attenuation of the motor 200 is ensured to be smaller.

[0121] It should be noted that if a riveted structure is provided at the centerline O of the stator tooth 120, it will increase the eddy current loss of the motor 200 and reduce the efficiency of the motor 200. However, the present application arranges the second riveted portion 121 offset from the centerline O of the stator tooth 120, which not only achieves the effect of fixed connection, but also minimizes eddy current loss and ensures the efficiency of the motor 200.

[0122] The rotor cavity 100 b has a central axis, and the center line O of the stator tooth 120 passes through the central axis of the rotor cavity 100 b.

[0123] Furthermore, if Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, the stator tooth 120 includes a tooth root 122 and a tooth shoe 123. The tooth root 122 is regular in shape, such as a rectangle. The first end of the tooth root 122 is connected to the stator yoke 110, and the second end of the tooth root 122 is provided with a tooth shoe 123. The stator winding 220 is mainly wound on the tooth root 122, and winding slots are formed circumferentially between adjacent stator teeth 120. The tooth shoe 123 is located at the notch of the winding slot. The tooth shoe 123 can prevent the stator winding 220 from escaping from the winding slot. The central symmetry line of the tooth root 122 passing through the central axis of the rotor cavity 100b is the center line O of the stator tooth 120. The second rivet portion 121 is provided on the tooth root 122. The area of ​​the tooth root 122 is larger than the tooth shoe 123, which can provide a variety of optional positions for the second rivet portion 121, thereby improving the flexibility and freedom of setting the second rivet portion 121. Moreover, the second riveted portion 121 is arranged on the tooth root 122 to avoid the second riveted portion 121 and the first riveted portion 111 being too far apart. By setting a yoke boundary line, the first riveted portion 111 and the second riveted portion 121 can also be prevented from being too close, so that the first riveted portion 111 and the second riveted portion 121 are distributed at an appropriate distance on the stator yoke 110 and the stator teeth 120, thereby providing reliable connectivity for the magnetic conductive sheet 100c as a whole.

[0124] It is worth noting that there are two tooth boots 123, and the two tooth boots 123 are distributed on different sides of the tooth root 122. One tooth boot 123 is located on one side of the tooth root 122 in the circumferential direction, and the other tooth boot 123 is located on the other side of the tooth root 122 in the circumferential direction. The two tooth boots 123 can be symmetrically distributed relative to the central symmetry line of the tooth root 122, thereby improving the overall symmetry of the stator core 100, and thus ensuring the efficiency of the motor 200.

[0125] Furthermore, if Figure 1As shown, in a direction perpendicular to the centerline O of the stator tooth 120, the width of the tooth root 122 is M, that is, the width direction of the stator yoke 110 is different from the width direction of the tooth root 122, and the magnetic conductive sheet 100c is generally T-shaped. The specific position of the second rivet 121 is related to the width of the tooth root 122. Although the second rivet 121 is located offset from the central symmetry line of the tooth root 122, the center point of the second rivet 121 and the central symmetry line of the tooth root 122 have the aforementioned relationship. That is, the second rivet 121 can be located within a certain range offset from the central symmetry of the tooth root 122 to minimize the loss of the stator tooth 120 and effectively reduce the loss of the motor 200 while ensuring the high precision of the motor 200. If the second rivet 121 is located at the edge of the tooth root 122, away from the central symmetry line of the tooth root 122, the second rivet 121 cannot provide an effective connection at the position of the stator tooth 120, and the loss cannot be reduced.

[0126] It should be noted that the second riveted portion 121 is provided at the middle of the tooth root 122 in the length direction of the tooth root 122 , so that the tooth root 122 can obtain a more uniform force, thereby improving the structural stability.

[0127] Furthermore, if Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, there are multiple first rivet portions 111 on the stator yoke 110, and the multiple first rivet portions 111 are distributed on different sides of the center line O of the stator teeth 120. Since the second rivet portions 121 are arranged close to the center line O of the stator teeth 120, the multiple first rivet portions 111 and the second rivet portions 121 can form a polygon, such as a triangle, a quadrilateral, etc., which can make the riveting effect on the magnetic conductive sheet 100c more uniform.

[0128] Specifically, when the number of the first rivet parts 111 is two, one first rivet part 111 is arranged on one side of the center line O of the stator tooth 120, and the other first rivet part 111 and the second rivet part 121 are arranged on the other side of the center line O of the stator tooth 120, then the three can form a stable triangle, and the triangular area occupies the central area of ​​the entire magnetic conductive sheet 100c. At this time, the riveting force exerted on the magnetic conductive sheet 100c is more stable and effective.

[0129] Furthermore, if Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, a plurality of first rivet portions 111 are symmetrically arranged on the stator yoke 110 , so that symmetrical riveting forces can be obtained at the positions of the stator yoke 110 , thereby ensuring the overall accuracy of the stator core 100 and the efficiency of the motor 200 .

[0130] Furthermore, if Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, the magnetic conductive sheet 100c is provided with a first rivet 111, a second rivet 121, and a third rivet 112. The first rivet 111 and the third rivet 112 can provide reliable connection performance for the stator yoke 110, and the second rivet 121 provides reliable connection performance for the stator teeth 120. Because the third rivet 112 and the first rivet 111 are located on different sides of the centerline of the stator teeth 120, the first rivet 111, the second rivet 121, and the third rivet 112 can form a stable triangle. The triangular area occupies the center area of ​​the entire magnetic conductive sheet 100c. In this case, the riveting force applied to the magnetic conductive sheet 100c is more stable and effective. Among them, the riveting bonding force of the third rivet 112 is greater than or equal to the riveting bonding force of the first rivet 111.

[0131] Furthermore, when the riveting bonding force of the third riveted part 112 is equal to the riveting bonding force of the second riveted part 121, the third riveted part 112 and the second riveted part 121 can be prepared using the same riveting process, that is, for the processing of the riveted structure on the magnetic conductive sheet 100c, two riveting processes can be used, that is, the first riveting process is used to process the first riveted part 111 on the stator yoke 110, and the second riveting process is used to process the second riveted part 121 on the stator tooth 120. At the same time, the third riveted part 112 can be processed on the stator yoke 110 to simplify the processing process.

[0132] Furthermore, the first riveted portion 111 and the third riveted portion 112 are symmetrically arranged on the stator yoke 110 , so that symmetrical riveting forces can be obtained at the positions of the stator yoke 110 , thereby ensuring the overall accuracy of the stator core 100 and the efficiency of the motor 200 .

[0133] According to a fourth aspect of the present application, a refrigeration device is provided, comprising the motor 200 or the compressor 300 provided by any of the above designs.

[0134] The refrigeration equipment provided in the present application includes the motor 200 or the compressor 300 provided by any of the above designs, and therefore has all the beneficial effects of the motor 200 or the compressor 300, which will not be repeated here.

[0135] In this application, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integrally connected; and "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0136] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations 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 any one or more embodiments or examples.

[0137] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A stator core, characterized in that: include: A plurality of core blocks are spliced ​​together to form a rotor cavity, each of the plurality of core blocks comprises a plurality of magnetic conductive sheets stacked along the axial direction of the rotor cavity, and each of the magnetic conductive sheets comprises: a stator yoke, wherein the stator yoke is provided with a first riveted portion, and the first riveted portions of adjacent magnetic conductive sheets among the plurality of magnetic conductive sheets are connected; and stator teeth connected to the stator yoke, the stator teeth being arranged near the center of the rotor cavity relative to the stator yoke, the stator teeth being provided with second rivet portions, and the second rivet portions of adjacent magnetic conductive sheets among the plurality of magnetic conductive sheets being connected; Wherein, the first riveted portion and the second riveted portion are riveted structures of different types, and the riveted bonding force of the first riveted portion is greater than the riveted bonding force of the second riveted portion; The center point of the second riveted portion is arranged away from the center line of the stator tooth; The stator teeth include: a tooth root, a first end of the tooth root being connected to the stator yoke; a tooth shoe provided at a second end of the tooth root, wherein a central symmetry line of the tooth root is a center line of the stator tooth, and the second riveted portion is provided on the tooth root; In a direction perpendicular to the center line of the stator tooth, the width of the tooth root is M, and the distance between the center point of the second riveted portion and the central symmetry line of the tooth root is N, where 0.01M≤N≤0.4M; There are two tooth shoes, and the two tooth shoes are symmetrically distributed relative to the central symmetry line of the tooth root.

2. The stator core according to claim 1, characterized in that The stator yoke includes a yoke inner edge line and a yoke outer edge line located on an axial end surface, the yoke inner edge line is arranged closer to the rotor cavity relative to the yoke outer edge line, a yoke dividing line is defined between the yoke inner edge line and the yoke outer edge line, and the first rivet portion is located between the yoke outer edge line and the yoke dividing line; The distance between the inner edge line of the yoke and the yoke dividing line is X, and the minimum width of the stator yoke in a direction parallel to the center line of the stator teeth is Y, satisfying X≤0.4Y.

3. The stator core according to claim 1 or 2, characterized in that: There are multiple first rivet parts, and the multiple first rivet parts are distributed on different sides of the center line of the stator tooth.

4. The stator core according to claim 3, characterized in that The plurality of first rivet portions are symmetrically distributed along a center line of the stator tooth.

5. The stator core according to claim 1 or 2, characterized in that: A third riveted portion is further provided on the stator yoke, and the first riveted portion and the third riveted portion are distributed on different sides of a center line of the stator teeth.

6. The stator core according to claim 5, characterized in that The riveting strength of the third riveting portion is the same as the riveting strength of the second riveting portion.

7. The stator core according to claim 5, characterized in that The center of the first riveted portion and the center of the third riveted portion are symmetrically distributed relative to the center line of the stator tooth.

8. A motor, characterized in that: include: The stator core according to any one of claims 1 to 7.

9. The motor according to claim 8, characterized in that The motor comprises: a rotor, located in a rotor cavity of the stator core and capable of rotating relative to the stator core; A direction from a center line of a stator tooth of the stator core to the second riveted portion of the stator core is a deviation direction, wherein the deviation direction is opposite to a rotation direction of the rotor.

10. A compressor, characterized in that: include: A motor as claimed in claim 8 or 9.

11. A refrigeration device, characterized in that: include: The motor according to claim 8 or 9; or The compressor according to claim 10.

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