Stator core, motor and washing equipment

Abstract

The utility model discloses a stator core, motor and washing equipment, belonging to the technical field of motor, the stator core comprises: a plurality of stator punching sheets, the stator punching sheets are provided with rotor holes, the stator punching sheets comprise a plurality of tooth parts, the plurality of tooth parts are distributed at intervals around the axis of the stator core, the rotor holes are formed in the plurality of stator punching sheets, and the tooth parts are arranged in the stator punching sheets. Tooth grooves communicated with the rotor hole are formed between the adjacent tooth parts, the sizes of the cross sections of the plurality of tooth grooves are not completely the same, and the plurality of tooth grooves are uniformly distributed along the circumferential direction of the stator iron core; wherein the outer contours of the plurality of stator punching sheets are non-circular, the plurality of stator punching sheets are laminated, the stator iron core is divided into a plurality of punching sheet groups along the axial direction of the stator iron core, each punching sheet group comprises at least one stator punching sheet, the adjacent punching sheet groups are staggered around the axis of the stator iron core, the outer contour lines of the adjacent punching sheet groups are not completely overlapped, and the outer contour lines of the adjacent punching sheet groups are not completely overlapped. Therefore, the stator iron core can improve the utilization rate of materials, and also has a good heat dissipation capability at the same time.

Description

Technical Field

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

[0002] With the further development of research on motor miniaturization and high speed, the heating problem of motors has become one of the technical bottlenecks. How to further improve the heat dissipation capacity of motors within a limited cost has important application value. The stator is the main heat source of the motor. One of the common technical means in the motor is to increase the material utilization rate of the core through different shapes of slots, thereby reducing the heat generation. However, when the slot shape optimization reaches a bottleneck, other technical means need to be sought to meet the heat dissipation requirements of the motor. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a stator core, which can improve the material utilization rate while also having a good heat dissipation capacity.

[0004] The utility model also provides a motor and a washing device comprising the stator core.

[0005] The stator core according to the first embodiment of the utility model comprises:

[0006] A plurality of stator punching sheets, each of which is provided with a rotor hole, and each of which includes a plurality of teeth, each of which is spaced apart around the axis of the stator core, wherein the rotor hole is formed in each of the plurality of stator punching sheets, and tooth slots connected to the rotor hole are formed between adjacent tooth slots, wherein the cross-sectional dimensions of the plurality of tooth slots are not completely the same, and the plurality of tooth slots are evenly distributed along the circumference of the stator core;

[0007] Among them, the outer contours of multiple stator punching sheets are non-circular, and multiple stator punching sheets are stacked. Along the axial direction of the stator core, the stator core is divided into multiple punching sheet groups, each of which includes at least one stator punching sheet, and adjacent punching sheet groups are staggered around the axis of the stator core so that the outer contour lines of adjacent punching sheet groups do not completely overlap.

[0008] The stator core according to the embodiment of the utility model has at least the following beneficial effects:

[0009] The stator core is formed by stacking a plurality of stator punching sheets. By setting a plurality of tooth slots with different cross-sectional sizes on each stator punching sheet, it is beneficial to optimize the magnetic field distribution and improve the running characteristics of the motor. By evenly distributing a plurality of tooth slots of different shapes along the circumference of the stator core, the material utilization rate of the stator core is improved. In the process of stacking the stator core, adjacent punching sheet groups are staggered around the axis of the stator core. Since the stator punching sheets of the stator core are non-circular plates, the outer contour lines of the adjacent staggered punching sheet groups do not overlap, so that there is a gap between the outer contours of the spaced punching sheet groups. The contact area between the outer wall of the punching sheet group and the air is large, and the heat dissipation effect is better, which can make the stator core have good heat dissipation capacity while taking into account the improvement of material utilization.

[0010] According to the stator core of the embodiment of the first aspect of the utility model, the multiple tooth slots in each stator punching sheet are divided into at least two groups, the cross-sectional dimensions of the tooth slots in different groups are different, and the tooth slots in at least two groups are staggeredly distributed along the circumference of the stator core.

[0011] According to the stator core of the first aspect of the present invention, the group with the least number of tooth slots is the first group, the number of tooth slots in the first group is N, and the angle of staggered spacing between adjacent punching sheet groups around the axis of the stator core is 360° / N, where N is 4, 6, 8 or 16.

[0012] According to the stator core of the first aspect of the present invention, the plurality of tooth slots include a plurality of first tooth slots and a plurality of second tooth slots, the plurality of second tooth slots are divided into a plurality of groups along the circumferential intervals of the stator core, the plurality of groups of the second tooth slots are staggered with the plurality of the first tooth slots, and along the radial direction of the rotor hole, the length of the first tooth slot is greater than the length of the second tooth slot.

[0013] According to the stator core of the embodiment of the first aspect of the utility model, the plurality of tooth slots further include a plurality of third tooth slots, the plurality of first tooth slots, the plurality of second tooth slots and the plurality of third tooth slots are staggered along the circumferential direction of the stator core, and the length of the third tooth slots is less than the length of the second tooth slots.

[0014] According to the stator core of the first embodiment of the utility model, the number of the first tooth slots is the same as or an integer multiple of the number of the second tooth slots, and the number of the third tooth slots is the same as the number of the first tooth slots or the number of the second tooth slots.

[0015] According to the stator core of the embodiment of the first aspect of the utility model, the number of the stator punching sheets in each punching sheet group is less than or equal to 1 / 4 of the total number of the stator punching sheets.

[0016] According to the stator core of the embodiment of the first aspect of the utility model, the outer contour of the stator punching sheet is square.

[0017] According to the stator core of the embodiment of the first aspect of the utility model, the adjacent punching sheet groups are staggered at an angle of 45° around the axis of the stator core.

[0018] According to the stator core of the first aspect of the utility model, the four corners of the stator punching sheets are respectively provided with connecting holes, the corners of each punching sheet group protrude from the periphery of the adjacent punching sheet group, and the connecting holes between the multiple punching sheet groups distributed at intervals are coaxially arranged.

[0019] The motor according to the second embodiment of the utility model comprises a rotor core and the stator core described in the first embodiment, wherein the rotor core is rotatably disposed in the rotor hole.

[0020] The motor according to the embodiment of the utility model has at least the following beneficial effects:

[0021] The stator core of the motor is formed by stacking multiple stator punching sheets. By setting multiple tooth slots with different cross-sectional sizes on each stator punching sheet, it is beneficial to optimize the magnetic field distribution and improve the operating characteristics of the motor. By evenly distributing multiple tooth slots of different shapes along the circumference of the stator core, the material utilization rate of the stator core is improved. During the stacking process of the stator core of the motor, adjacent punching sheet groups are staggered around the axis of the stator core. Since the stator punching sheets of the stator core are non-circular plates, the outer contours of the adjacent staggered punching sheet groups do not overlap, and there are gaps between the outer contours of the spaced punching sheet groups. The contact area between the outer wall of the punching sheet group and the air is large, and the heat dissipation effect is better. The stator core can have good heat dissipation capacity while taking into account the improvement of material utilization, which is beneficial to the development of motors towards miniaturization and high speed.

[0022] The washing device according to the embodiment of the third aspect of the utility model comprises the motor described in the embodiment of the second aspect.

[0023] The washing device of the embodiment of the utility model has at least the following beneficial effects: since the adjacent punching sheet groups inside the motor are staggered around the axis of the stator core so that there is a gap between the outer contours of the spaced punching sheet groups, the contact area between the outer wall of the punching sheet group and the air is larger, and the motor can be miniaturized while ensuring heat dissipation. In the washing device, the miniaturization of the motor can not only make the internal structure of the device more compact and simplified, but also reduce the overall volume of the device.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0026] Figure 1 This is a schematic structural diagram of a stator punching sheet according to an embodiment of the utility model;

[0027] Figure 2 It is a schematic structural diagram of a plurality of stator punching sheets stacked in one embodiment of the utility model;

[0028] Figure 3 This is a schematic structural diagram of a stator core according to an embodiment of the present utility model;

[0029] Figure 4 It is a structural schematic diagram of a stator punching sheet of another embodiment of the utility model;

[0030] Figure 5 A side view of a stator core according to an embodiment of the present utility model;

[0031] Figure 6 It is a side view of a stator core according to another embodiment of the utility model.

[0032] Figure Number:

[0033] stator punching sheet 100; rotor hole 110; tooth portion 120; tooth slot 130; first tooth slot 131; second tooth slot 132; third tooth slot 133; connecting hole 140; notch 150;

[0034] Stator core 1000; Punching sheet group 1100. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] With the further deepening of research on motor miniaturization and high speed, the heating problem of motors has become one of the technical bottlenecks. As the main heat source of the motor, how to improve the heat dissipation capacity of the stator has important application value. At present, the stator punchings are usually made of punchings of the same shape repeatedly stacked along the same position. This structure makes the contact surface between the entire stator core and the air outside the motor very limited. Since the stator is the main heat source in the motor, its heat dissipation performance is crucial. In order to improve the material utilization rate of the core and reduce the heat generation, different shapes of tooth slots are often used as one of the technical means in motor design. However, when the optimization of the tooth slot shape reaches a technical bottleneck, it is necessary to explore other innovative technical means to meet the motor's growing demand for heat dissipation performance, ensure that the motor can maintain a stable temperature during operation, and improve the motor's working efficiency and life.

[0040] In order to solve the above problems, the utility model provides a stator core 1000, in which the outer contour lines of adjacent punching sheet groups 1100 in the stator core 1000 do not overlap, and there are gaps between the outer contours of the spaced punching sheet groups 1100, which is beneficial to increase the contact area between the outer wall of the punching sheet group 1100 and the air, so that the stator core 1000 can ensure that the stator punching sheet 100 has a good heat dissipation capacity while improving the material utilization rate. The specific structure and function of the stator core 1000 provided by the embodiment of the utility model will be further explained in conjunction with text and drawings below.

[0041] Reference Figure 1 and Figure 2 As shown, the stator core 1000 according to the first embodiment of the utility model comprises: a plurality of stator punching sheets 100, each of which is provided with a rotor hole 110 and a plurality of teeth 120, wherein Figure 1 As shown, the rotor hole 110 is located in the middle of the stator punching sheet 100, and a plurality of tooth portions 120 are circumferentially spaced apart along the axis of the stator core 1000, and tooth slots 130 connected to the rotor hole 110 are formed between adjacent tooth portions 120, and the cross-sectional dimensions of the plurality of tooth slots 130 are not completely the same, and the plurality of tooth slots 130 are evenly distributed circumferentially along the axis of the stator core 1000.

[0042] Reference Figure 3As shown, the outer contours of the plurality of stator punching sheets 100 are non-circular, and the plurality of stator punching sheets 100 are stacked. Along the axial direction of the stator core 1000, the stator core 1000 is composed of a plurality of punching sheet groups 1100. Each punching sheet group 1100 includes at least one stator punching sheet 100. Adjacent punching sheet groups 1100 are staggered around the axis of the stator core 1000 so that the outer contour lines of adjacent punching sheet groups 1100 do not completely overlap. When the outer contour lines of adjacent punching sheet groups 1100 do not completely overlap, part of the peripheral edge of one punching sheet group 1100 will protrude from the peripheral edge of another punching sheet group 1100. In this way, after the plurality of punching sheet groups 1100 are stacked together, there is a certain gap between the spaced punching sheet groups 1100, which can increase the contact area between the outer wall of the punching sheet group 1100 and the air.

[0043] According to the stator core 1000 of the embodiment of the utility model, during the stacking process of the stator core 1000, the stator core 1000 is stacked by a plurality of stator punching sheets 100. By providing a plurality of tooth slots 130 with different cross-sectional sizes on each stator punching sheet 100, it is beneficial to optimize the magnetic field distribution and improve the running characteristics of the motor. By evenly distributing the plurality of tooth slots 130 with different shapes along the circumference of the stator core 1000, the material utilization rate of the stator core 1000 is improved. The adjacent punching sheet groups 1100 are arranged around the axis of the stator core 1000. The lines are staggered. Since the stator punching sheets 100 of the stator core 1000 are non-circular plates, the outer contour lines of the adjacent staggered punching sheet groups 1100 do not overlap, so that there are gaps between the outer contour lines of the spaced punching sheet groups 1100. The contact area between the outer wall of the punching sheet group 1100 and the air is larger, thereby increasing the contact area between the outer wall of the entire stator core 1000 and the air, and having a better heat dissipation effect. The stator core 1000 can ensure that the stator punching sheets 100 have both improved material utilization and better heat dissipation capabilities.

[0044] Reference Figure 3 As shown, it should be noted that the cross-sectional dimensions of the plurality of tooth slots 130 are not completely the same, which can be understood as that the dimensions of the projections of the tooth slots 130 are not completely the same along the axial direction of the stator core 1000, and the dimensions of the projections include dimensions such as length, width, and area. For example, the projection area of ​​a portion of the tooth slots is greater than the projection area of ​​another portion of the tooth slots, or the projections may be in different shapes. When the stator core 1000 is applied to a motor, the cross-sectional dimensions of the tooth slots 130 can be set according to actual production and use requirements, which can not only improve the utilization rate of the material, but also help to increase the contact area between the outer wall of the entire stator core 1000 and the air.

[0045] Reference Figure 3As shown, it can be understood that adjacent punching sheet groups 1100 are staggered around the axis of the stator core 1000, so that the tooth slots 130 with the same cross-sectional shape and size on adjacent punching sheet groups 1100 correspond to each other and are connected, ensuring that multiple tooth slots 130 can overlap after multiple stator punching sheets 100 are stacked, while the outer peripheral edges of adjacent punching sheet groups 1100 do not overlap.

[0046] Reference Figure 1 As shown, it can be understood that the shape of the stator punching sheet 100 can be set according to actual needs, and no specific limitation is made here; for example, the shape of the stator punching sheet 100 can be set to be square, and the square plate body can ensure that the outer contours of adjacent punching sheet groups 1100 do not overlap after being staggered around the axis of the stator core 1000. Under the premise of meeting the above conditions, there is a large contact area between the stator punching sheet 100 and the air, which is conducive to improving the heat dissipation capacity. Of course, the shape of the stator punching sheet 100 can also be elliptical, rhombus or other polygonal shapes.

[0047] Reference Figure 1 and Figure 2 As shown, the corner edge of the square plate can be cut to form a notch 150. When the stator punching sheet 100 is cut, the four corners of the square plate are cut to form the notch 150, which is beneficial to improve the utilization rate of the plate and achieve the purpose of saving material. In addition, since the structure of each stator punching sheet 100 is the same, that is, the shape and size of each stator punching sheet are consistent, the stator core 1000 is formed by stacking the same stator punching sheets 100. Compared with the method of stacking stator punching sheets 100 of different shapes, it can achieve rapid cutting of the plate during the processing process and rapid stacking during the installation process, which is beneficial to simplify the plate cutting method and the stator core 1000 installation process.

[0048] Reference Figure 1 and Figure 2 As shown, according to the stator core 1000 of the embodiment of the first aspect of the utility model, the multiple tooth slots 130 in each stator punching sheet 100 are divided into at least two groups, and the cross-sectional dimensions of the tooth slots 130 in different groups are different. In actual applications, the stator punching sheet 100 is designed with different groups of tooth slots 130 with different cross-sectional dimensions, which can not only optimize the winding layout inside the stator core 1000, but also improve the heat dissipation performance and mechanical strength of the stator core 1000, simplify the manufacturing process, and reduce production costs; further, at least two groups of tooth slots 130 are staggered along the circumference of the stator core 1000 to ensure that when adjacent punching sheet groups 1100 are staggered around the axis of the stator core 1000, the multiple tooth slots 130 on the adjacent punching sheet groups 1100 can correspond one by one and be connected.

[0049] It should be noted that the performance of the motor is related to the material utilization of the stator core 1000. When the outer contour of the stator punching sheet 100 of the stator core 1000 is non-circular, the material utilization of the slots 130 with different cross-sectional sizes on the stator punching sheet 100 is higher than that of the slots 130 with the same cross-sectional size. Therefore, when the stator core 1000 has the same number of stator punching sheets 100, the distribution of multiple slots 130 with different cross-sectional sizes can make the motor performance better.

[0050] Reference Figure 1 and Figure 3 As shown, it can be understood that by arranging tooth slots 130 with different cross-sectional sizes on the stator punching sheet 100, the distribution of the magnetic field in the stator core 1000 can be adjusted and optimized, so that the magnetic field is more uniform, the magnetic resistance is reduced, and the efficiency of the motor is improved; further, since the shape of the tooth slot 130 has a direct impact on the noise and vibration of the motor, the noise and vibration generated by the motor during operation can be reduced by reasonably designing the cross-sectional size of the tooth slot 130, thereby improving the running stability of the motor.

[0051] Reference Figure 1 and Figure 3 As shown, according to the stator core 1000 of the embodiment of the first aspect of the utility model, the group with the least number of tooth slots 130 is the first group, the number of tooth slots 130 in the first group is N, and the angle of staggered spacing between adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 360° / N, wherein N is 4, 6, 12 or 16. When the outer contours of adjacent punching sheet groups 1100 do not completely overlap, the number N of tooth slots 130 can ensure that when adjacent punching sheet groups 1100 are staggered around the axis of the stator core 1000, the tooth slots 130 with the same cross-sectional shape and size on adjacent punching sheet groups 1100 can correspond one to one and be connected.

[0052] It is understandable that the number N of the tooth grooves 130 in the first group can be 4, 6, 8, 12, 16, etc. Figure 2As shown, assuming that the angle of staggered spacing between adjacent punching sheet groups 1100 around the axis of the stator core 1000 is α, when the number of tooth slots 130 in the first group is 4, the angle of staggered spacing between adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 90°; when the number of tooth slots 130 in the first group is 6, the angle of staggered spacing between adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 60°; when the number of tooth slots 130 in the first group is 6, the angle of staggered spacing between adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 60°; When the number of tooth slots 130 in the first group is 8, the angle α of adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 45°; when the number of tooth slots 130 in the first group is 12, the angle α of adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 30°; when the number of tooth slots 130 in the first group is 16, the angle α of adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 22.5°.

[0053] Reference Figure 2 and Figure 3 As shown, according to the stator core 1000 of the embodiment of the first aspect of the utility model, the multiple tooth slots 130 include multiple first tooth slots 131 and multiple second tooth slots 132, and the multiple second tooth slots 132 are distributed in multiple groups at staggered intervals along the circumference of the stator core 1000, and the multiple groups of second tooth slots 132 are staggered with the multiple groups of first tooth slots 131. When adjacent punching sheet groups 1100 are staggered around the axis of the stator core 1000, the multiple first tooth slots 131 on the adjacent punching sheet groups 1100 can correspond one by one, and the multiple second tooth slots 132 can correspond one by one.

[0054] It is understandable that, during the operation of the motor, the length of the tooth slot 130 is directly related to the magnetic flux distribution inside the motor. In some embodiments of the present invention, along the radial direction of the rotor hole 110, the length of the first tooth slot 131 is greater than the length of the second tooth slot 132. The longer first tooth slot 131 can provide a wider magnetic flux path, which is beneficial to the uniform distribution of the internal magnetic field of the motor and the reduction of the magnetic resistance generated during operation.

[0055] It should be noted that by adjusting the length of the first tooth slot 131 and / or the second tooth slot 132 , the torque output of the motor can be optimized to achieve a smoother torque output, which is beneficial to reducing torque pulsation and improving the dynamic performance of the motor.

[0056] It should be noted that, in some embodiments, the number of the first tooth slots 131 may be 8, and the number of the second tooth slots 132 may be 8, in which case the angle α of the adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 45°; in other embodiments, the number of the first tooth slots 131 may be 8, and the number of the second tooth slots 132 may be 16, in which case the angle α of the adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 45°; in other embodiments, the number of the first tooth slots 131 may be 4, and the number of the second tooth slots 132 may be 8, in which case the angle α of the adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 90°; in actual application, the number of the first tooth slots 131 and the number of the second tooth slots 132 may be the same or an integer multiple, and the specific number of the first tooth slots 131 and the second tooth slots 132 may be set according to actual needs.

[0057] Reference Figure 4 As shown, in some embodiments, the multiple tooth slots 130 can also include a plurality of third tooth slots 133, and the multiple first tooth slots 131, the multiple second tooth slots 132, and the multiple third tooth slots 133 are evenly staggered along the circumference of the stator core 1000. When adjacent punching sheet groups 1100 are staggered around the axis of the stator core 1000, the multiple first tooth slots 131 on adjacent punching sheet groups 1100 can correspond one-to-one and be connected, the multiple second tooth slots 132 can correspond one-to-one and be connected, and the multiple third tooth slots 133 can correspond one-to-one and be connected.

[0058] It can be understood that during the operation of the motor, the shorter tooth slot 130 can limit the magnetic flux path inside the motor to a certain extent and increase a certain magnetic resistance. In some embodiments of the present invention, along the radial direction of the rotor hole 110, the length of the third tooth slot 133 is less than the length of the second tooth slot 132. The shorter third tooth slot 133 cooperates with the longer third tooth slot 133 to provide a more suitable magnetic flux path inside the motor.

[0059] It should be noted that the lengths of the first tooth slot 131 , the second tooth slot 132 and the third tooth slot 133 can affect the magnetic flux distribution, torque characteristics and heat dissipation performance of the motor. During the production process, the lengths between the first tooth slot 131 , the second tooth slot 132 and the third tooth slot 133 can be adjusted according to actual needs.

[0060] According to the stator core 1000 of the embodiment of the first aspect of the utility model, the number of the first tooth slots 131 is the same as or an integer multiple of the number of the second tooth slots 132, the number of the third tooth slots 133 is the same as the number of the first tooth slots 131 or the number of the second tooth slots 132, and when the multiple first tooth slots 131, the multiple second tooth slots 132 and the multiple third tooth slots 133 are staggered along the circumference of the stator core 1000, they can be evenly distributed in the circumference of the stator core 1000.

[0061] It should be noted that Figure 4 In the embodiment shown, the number of the first tooth slots 131 may be 8, the number of the second tooth slots 132 may be 8, and the number of the third tooth slots 133 may be 8. In this case, the angle α of the adjacent punching sheet groups 1100 staggered around the axis of the stator core 1000 is 45°. Of course, Figure 4 The figure shows only one embodiment of the stator punching sheet; in some embodiments, the number of the first tooth slots 131 may be 8, the number of the second tooth slots 132 may be 16, and the number of the third tooth slots 133 may be 8, in which case the angle α between adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 45°; in other embodiments, the number of the first tooth slots 131 may be 4, the number of the second tooth slots 132 may be 8, and the number of the third tooth slots 133 may be 4, in which case the angle α between adjacent punching sheet groups 1100 around the axis of the stator core 1000 is 90°; in actual application, the specific numbers of the first tooth slots 131, the second tooth slots 132 and the third tooth slots 133 may be set according to actual needs.

[0062] Reference Figure 3 As shown, according to the stator core 1000 of the embodiment of the first aspect of the utility model, the number of stator punchings 100 in each punching group 1100 is the same or different, and is less than or equal to 1 / 4 of the total number of stator punchings 100. During application, the number of stator punchings 100 in the punching groups 1100 at different parts can be adjusted to meet the heat dissipation requirements of different parts of the stator core 1000; the number of stator punchings 100 in each punching group 1100 in the stator core 1000 is less than or equal to 1 / 4 of the total number of stator punchings 100, that is, it is necessary to ensure that the number of punching groups 1100 on the stator core 1000 is greater than or equal to 4 groups, which is not only conducive to increasing the contact area between the outer wall of the punching group 1100 and the air, but also can prevent the stator core 1000 from having poor heat dissipation due to the small number of punching groups 1100.

[0063] It can be understood that in the stator core 1000, the number of stator punching sheets 100 in different punching sheet groups 1100 may be different. For example, in one punching sheet group 1100, the number of stator punching sheets 100 may be 2, while in another punching sheet group 1100, the number of stator punching sheets 100 may be 1. During application, the number of stator punching sheets 100 in different parts of the punching sheet group 1100 can be adjusted according to actual heat dissipation requirements.

[0064] It should be noted that the number of stator punching sheets 100 in each punching sheet group 1100 can be limited to between 1 and 6 sheets, and preferably, the number of stator punching sheets 100 in each punching sheet group 1100 is 1 sheet or 2 sheets; in the application process, the fewer the number of stator punching sheets 100 in each punching sheet group 1100, the larger the contact surface between the punching sheet group 1100 and the air in the entire stator core 1000, which is more conducive to heat dissipation; preferably, refer to Figure 5 , the number of stator punching sheets 100 in each punching sheet group 1100 is set to 1 sheet, then both sides of each stator punching sheet 100 in the punching sheet group 1100 are in contact with the air, and the heat dissipation area is large; preferably, refer to Figure 6 The number of stator punching sheets 100 in each punching sheet group 1100 is set to 3. During application, the number of stator punching sheets 100 in the punching sheet group 1100 can be adjusted according to actual heat dissipation requirements.

[0065] Reference Figure 1 and Figure 2 As shown, according to the stator core 1000 of the embodiment of the first aspect of the utility model, the outer contour of the stator punching sheet 100 is a square. The square plate body can ensure that the outer contour lines of adjacent punching sheet groups 1100 do not overlap after being staggered around the axis of the stator core 1000. The stator punching sheet 100 can have a larger contact area with the air, which is beneficial to improving the heat dissipation capacity. In addition, the corner edges of the square plate body can be cut to form notches 150. When the stator punching sheet 100 sheet is cut, a plurality of squares with notches 150 on the corner edges can be staggered on the sheet, which is beneficial to improving the utilization rate of the sheet and achieving the purpose of saving material.

[0066] Reference Figure 2 As shown, according to the stator core 1000 of the first aspect of the utility model embodiment, the angle of offset between adjacent punching sheet groups 1100 around the axis of the stator core 1000 is α, satisfying α=45°. When the angle α of offset between adjacent punching sheet groups 1100 around the axis of the stator core 1000 is set to 45°, each stator punching sheet 100 in each punching sheet group 1100 has a larger contact area with the air, which is beneficial to increase the total heat dissipation area of ​​the stator core 1000.

[0067] It can be understood that the multiple tooth slots 130 may include multiple first tooth slots 131 and multiple second tooth slots 132, and the multiple first tooth slots 131 and the multiple second tooth slots 132 are staggered along the circumference of the stator core 1000. The angle α at which adjacent punching sheet groups 1100 are staggered around the axis of the stator core 1000 can be determined according to the number of first tooth slots 131 and second tooth slots 132. For example, the number of first tooth slots 131 on the stator punching sheet 100 can be 6, and the number of second tooth slots 132 can be 12. At this time, the angle α at which adjacent punching sheet groups 1100 are staggered around the axis of the stator core 1000 is 60°. Alternatively, the number of first tooth slots 131 can be 4, and the number of second tooth slots 132 can be 8, and the angle α at which adjacent punching sheet groups 1100 are staggered around the axis of the stator core 1000 is 90°. When adjacent punching sheet groups 1100 are staggered at different angles around the axis of the stator core 1000 , the contact area between the stator punching sheets 100 in each punching sheet group 1100 and the air is different, which can be set according to heat dissipation requirements in actual applications.

[0068] Reference Figure 3 As shown, according to the stator core 1000 of the embodiment of the first aspect of the utility model, the four corners of the stator punching sheet 100 are respectively provided with connecting holes 140, the corners of each punching sheet group 1100 protrude from the circumference of the adjacent punching sheet group 1100, and the connecting holes 140 between the multiple punching sheet groups 1100 distributed at intervals are coaxially arranged. During installation, the fixing parts (such as studs, screws, etc.) can be inserted into the connecting holes 140 coaxially arranged between the multiple punching sheet groups 1100, which is conducive to simplifying the installation process and improving the installation efficiency.

[0069] The motor according to the second embodiment of the utility model comprises a rotor core and the stator core 1000 of the first embodiment, and the rotor core is rotatably disposed in the rotor hole 110 .

[0070] According to the motor of the embodiment of the utility model, the stator core 1000 of the motor is formed by stacking a plurality of stator punching sheets 100. By setting a plurality of tooth slots 130 with different cross-sectional sizes on each stator punching sheet 100, it is beneficial to optimize the magnetic field distribution and improve the running characteristics of the motor. By evenly distributing a plurality of tooth slots 130 of different shapes along the circumference of the stator core 1000, the material utilization rate of the stator core 1000 is improved. During the stacking process of the stator core 1000 of the motor, adjacent punching sheet groups 1100 are staggered around the axis of the stator core 1000. The stator punching sheets 100 of the stator core 1000 are non-circular plates, so the outer contours of adjacent staggered punching sheet groups 1100 do not overlap, and there are gaps between the outer contours of the spaced punching sheet groups 1100. The contact area between the outer wall of the punching sheet group 1100 and the air is large, thereby increasing the contact area between the outer wall of the entire stator core 1000 and the air, and having a better heat dissipation effect. The stator core 1000 can ensure that the stator punching sheets 100 have improved material utilization while also having better heat dissipation capabilities, which is beneficial to the development of motors towards miniaturization and high speed.

[0071] The washing device according to the third aspect of the utility model comprises the motor of the second aspect.

[0072] The washing device of the embodiment of the utility model can specifically be a washing machine, a dryer and other equipment. Since the adjacent punching sheet groups 1100 inside the motor are staggered around the axis of the stator core 1000 so that there is a gap between the outer contour edges of the spaced punching sheet groups 1100, the contact area between the outer wall of the punching sheet group 1100 and the air is larger, thereby increasing the contact area between the outer wall of the entire stator core 1000 and the air. The motor can be miniaturized while ensuring heat dissipation. In the washing device, the miniaturization of the motor can not only make the internal structure of the device more compact and simplified, but also reduce the overall size of the device, which can not only facilitate the transportation of the washing device as a whole, but also enable the washing device to more flexibly adapt to different spatial layouts.

[0073] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A stator core, characterized in that: include: A plurality of stator punching sheets, each of which is provided with a rotor hole, and each of which includes a plurality of teeth, each of which is spaced apart around the axis of the stator core, wherein the rotor hole is formed in each of the plurality of stator punching sheets, and tooth slots connected to the rotor hole are formed between adjacent tooth slots, wherein the cross-sectional dimensions of the plurality of tooth slots are not completely the same, and the plurality of tooth slots are evenly distributed along the circumference of the stator core; Among them, the outer contours of multiple stator punching sheets are non-circular, and multiple stator punching sheets are stacked. Along the axial direction of the stator core, the stator core is divided into multiple punching sheet groups, each of which includes at least one stator punching sheet, and adjacent punching sheet groups are staggered around the axis of the stator core so that the outer contour lines of adjacent punching sheet groups do not completely overlap.

2. The stator core according to claim 1, characterized in that: The plurality of tooth slots in each stator punching sheet are divided into at least two groups, the cross-sectional dimensions of the tooth slots in different groups are different, and the tooth slots in at least two groups are staggeredly distributed along the circumferential direction of the stator core.

3. The stator core according to claim 2, characterized in that: The group with the least number of tooth slots is the first group, the number of tooth slots in the first group is N, and the angle of staggered spacing between adjacent punching sheet groups around the axis of the stator core is 360° / N, where N is 4, 6, 8, 12 or 16.

4. The stator core according to claim 1, characterized in that: The plurality of tooth slots include a plurality of first tooth slots and a plurality of second tooth slots. The plurality of second tooth slots are divided into a plurality of groups along the circumferential intervals of the stator core. The plurality of groups of the second tooth slots are staggered with the plurality of the first tooth slots. Along the radial direction of the rotor hole, the length of the first tooth slot is greater than the length of the second tooth slot.

5. The stator core according to claim 4, characterized in that: The plurality of tooth slots further include a plurality of third tooth slots. The plurality of first tooth slots, the plurality of second tooth slots and the plurality of third tooth slots are staggeredly distributed along the circumferential direction of the stator core. The length of the third tooth slots is less than the length of the second tooth slots.

6. The stator core according to claim 5, characterized in that: The number of the first tooth grooves is the same as or an integer multiple of the number of the second tooth grooves, and the number of the third tooth grooves is the same as the number of the first tooth grooves or the number of the second tooth grooves.

7. The stator core according to claim 1, characterized in that: The number of the stator punching sheets in each punching sheet group is less than or equal to 1 / 4 of the total number of the stator punching sheets.

8. The stator core according to claim 1, characterized in that: The outer contour of the stator punching sheet is square.

9. The stator core according to claim 8, characterized in that: The adjacent punching sheet groups are staggered at an angle of 45° around the axis of the stator core.

10. The stator core according to claim 8, characterized in that: The four corners of the stator punching sheets are respectively provided with connecting holes, the corners of each punching sheet group protrude from the peripheral edge of the adjacent punching sheet group, and the connecting holes between the plurality of punching sheet groups distributed at intervals are coaxially arranged.

11. A motor, characterized in that: The invention comprises a rotor core and a stator core according to any one of claims 1 to 10, wherein the rotor core is rotatably arranged in the rotor hole.

12. A washing device, characterized in that: Includes the motor as claimed in claim 11.

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