Stator core and motor assembly

Abstract

The utility model discloses a stator core and a motor assembly, and belongs to the technical field of motor equipment. The stator iron core comprises a plurality of single iron cores, the single iron cores are connected into a strip shape, each single iron core comprises a stator yoke part, a stator tooth part connected to the stator yoke part and a stator tooth boot connected to the stator tooth part, and the adjacent stator yoke parts are connected in a bendable mode and used for winding the adjacent single iron cores around the axis of the stator iron core. According to the stator iron core, the material utilization rate can be improved, and the stator iron core can be conveniently rounded.

Description

Technical Field

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

[0002] Reducing costs and increasing efficiency is one of the important goals of motor design. The electromagnetic technology of fan and water pump motors in the current home appliance industry is relatively mature, and it is difficult to achieve the goal of reducing costs and increasing efficiency simply by optimizing the electromagnetic solution. In related technologies, the stator cores of fan and water pump motors are in the form of full circle and block types. The material utilization rate of the full circle core is low, and it is wound using a needle winding machine, which has a low winding slot fill rate, affecting the efficiency and performance of the motor; each tooth of the block core is wound separately, and the circle is assembled after winding, and the coaxiality of the round stator is poor, which affects the vibration and noise of the motor; and the material utilization rate of the full circle stator core is low. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] Therefore, one object of the utility model is to provide a stator core which can improve the material utilization rate and facilitate the rounding of the stator core.

[0005] Another object of the present invention is to provide a motor component, wherein the motor component includes the aforementioned stator core.

[0006] According to the stator core of the embodiment of the utility model, the stator core includes a plurality of single cores, the plurality of single cores are connected into a strip shape, the single core includes a stator yoke, a stator tooth connected to the stator yoke, and a stator tooth shoe connected to the stator tooth, and adjacent stator yokes are bendably connected so that adjacent single cores are wound around the axis of the stator core.

[0007] The stator core according to the embodiment of the utility model can improve the material utilization rate and facilitate the rounding of the stator core.

[0008] In addition, the stator core according to the above embodiment of the utility model may also have the following additional technical features:

[0009] Optionally, the stator yoke has a first side and a second side opposite to each other, the stator teeth are connected to the first side, and the first side is recessed toward the second side relative to a line connecting two ends of the first side.

[0010] Optionally, the first side and the second side are substantially concentric arcs.

[0011] Optionally, the stator tooth shoe has a third side and a fourth side opposite to each other, the fourth side is closer to the stator yoke than the third side, and the third side is recessed toward the fourth side relative to a line connecting two ends of the third side.

[0012] Optionally, an angle α is formed between the fourth side of the stator tooth shoe and the corresponding side of the stator tooth portion, and the angle α is not less than 90° and not more than 135°.

[0013] Optionally, the third side extends in a direction around the axis, and the third side has a spacing R1 with the axis. In the projection of the stator core on a predetermined surface, there is a distance B0 between the sides of two adjacent stator yoke parts, and the ratio of the distance B0 to the spacing R1 satisfies the condition of 0.01-0.15, and the predetermined surface is an arc surface centered on the axis.

[0014] Optionally, the second side and the third side extend in a direction around the axis, the second side has a spacing R3 with the axis, the third side has a spacing R1 with the axis, and a ratio of the spacing R3 to the spacing R1 is not less than 1.5 and not greater than 2.5.

[0015] Optionally, the first side extends in a direction around the axis, the first side has a spacing R2 with the axis, the spacing R3 has a difference Bj with the spacing R2, and the ratio of the difference Bj to the spacing R1 is not less than 0.1 and not greater than 0.25.

[0016] Optionally, the third side extends in a direction around the axis, the third side has a spacing R1 with the axis, and a ratio of a width dimension Bt of the stator tooth portion to the spacing R1 satisfies a condition of 0.1-0.25.

[0017] According to the motor assembly of the embodiment of the utility model, the motor assembly includes the above-mentioned stator core.

[0018] According to the motor assembly of the embodiment of the utility model, by applying the aforementioned stator core, the cost of the motor assembly can be reduced and the working performance of the motor assembly can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the stator core in some embodiments of the utility model.

[0020] Figure 2 It is a schematic diagram of the stator core in some embodiments of the utility model.

[0021] Figure 3 It is a layout diagram of two stator cores in some embodiments of the utility model.

[0022] Reference numerals:

[0023] The stator core 100 includes a single core 10 , a stator yoke 11 , a first side 111 , a second side 112 , a stator tooth 12 , a stator tooth shoe 13 , a third side 131 , a fourth side 132 , and a stator slot 14 . DETAILED DESCRIPTION

[0024] 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 intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] The utility model provides a stator core 100, which can improve the material utilization rate and facilitate the stator core 100 to be rounded.

[0026] Reference Figures 1 to 3 According to the stator core 100 of the embodiment of the utility model, the stator core 100 includes a plurality of single cores 10, and the plurality of single cores 10 are connected into a strip shape. The single core 10 includes a stator yoke 11, a stator tooth 12 connected to the stator yoke 11, and a stator tooth shoe 13 connected to the stator tooth 12. Adjacent stator yokes 11 can be connected in a bendable manner so that adjacent single cores 10 are wound around the axis of the stator core 100; therefore, the material utilization rate can be improved and the stator core 100 can be easily rounded.

[0027] Specifically, multiple single cores 10 can be formed by stamping, cutting, etc., and the multiple single cores 10 after forming can be connected into strips, wherein the stator yokes 11 of adjacent single cores 10 are connected by the material left after forming, so that the adjacent stator yokes 11 can be bent so that the multiple single cores 10 are wound around the axis of the stator core 100 to form a complete stator core 100; it can be understood that during processing and manufacturing, the multiple single cores 10 of a stator core 100 can be staggered with the multiple single cores 10 of another stator core 100 to improve the utilization rate of materials, and the adjacent single cores 10 in the processed multiple single cores 10 can be connected by bending to facilitate the formation of a circular stator core 100. In addition, the stator yokes 11, stator teeth 12 and stator tooth shoes 13 of adjacent single cores 10 are surrounded to form a stator slot 14, and the stator slot 14 is used for winding the coil therein.

[0028] In addition, the stator core 100 in this embodiment can improve the utilization rate of materials compared to a full-circular stator core, and can be easily rounded compared to a block-type stator core. After rounding, the stator has good coaxiality and reduces the vibration noise of the motor assembly.

[0029] Reference Figures 1 to 3 In some embodiments of the present invention, the stator yoke 11 has a first side 111 and a second side 112 opposite to each other, the stator tooth 12 is connected to the first side 111, and the first side 111 is recessed toward the second side 112 relative to a line connecting two ends of the first side 111; this can improve material utilization.

[0030] Specifically, in combination with the above-mentioned embodiments, the multiple single cores 10 of one stator core 100 can be arranged staggered with the multiple single cores 10 of another stator core 100 to improve the material utilization rate. It can be understood that in order to improve the material utilization rate, one stator core 100 can be arranged staggered relative to the other stator core 100, so that one stator core 100 can be located in the stator slot 14 of the other stator core 100, thereby further increasing the material utilization rate. And the first side 111 of the stator yoke 11 is concave toward the second side 112 relative to the connecting line of the two ends of the first side 111, so as to further increase the size of the stator slot 14, so that the two stator cores 100 can be arranged more closely, so as to improve the material utilization rate, and the slot filling rate of the stator core 100 can be increased, thereby improving the working performance of the motor assembly.

[0031] Reference Figures 1 to 3 In some embodiments of the present invention, the first side 111 and the second side 112 are substantially concentric arcs. This arrangement can make the structure of the stator yoke 11 smoother and flatter, thereby improving the roundness of the stator core 100 and reducing the vibration noise of the motor assembly.

[0032] Reference Figures 1 to 3 In some embodiments of the present invention, the stator tooth shoe 13 has a third side 131 and a fourth side 132 relative to each other, the fourth side 132 is closer to the stator yoke 11 than the third side 131, and the third side 131 is recessed toward the fourth side 132 relative to the line connecting the two ends of the third side 131; in this way, the material utilization rate can be improved.

[0033] Specifically, one stator core 100 is arranged staggered with another stator core 100, wherein the stator tooth shoe 13 of the single core 10 in one stator core 100 can be arranged in the stator slot portion 14 of the other stator core 100 and with the stator yoke 11 of the other stator core 100, and the third side 131 of the stator tooth shoe 13 is opposite to the first side 111 of the stator yoke 11, and the third side 131 of the stator tooth shoe 13 is recessed toward the fourth side 132 relative to the connecting line of the two ends of the third side 131, and the first side 111 of the stator yoke 11 is recessed toward the second side 112 relative to the connection between the two ends of the first side 111, so that the stator yoke 11 and the stator tooth shoe 13 give way to each other, so that one stator core 100 and the other stator core 100 are arranged more closely, thereby further improving material utilization.

[0034] Reference Figures 1 to 3 In some embodiments of the present invention, an angle α is formed between the fourth side 132 of the stator tooth shoe 13 and the corresponding side of the stator tooth portion 12, and the angle α is not less than 90° and not greater than 135°; such a setting can improve the working performance of the motor assembly.

[0035] Specifically, in a single core 10, the stator tooth portion 12 has two opposite sides in the width direction, and one side of the stator tooth portion 12 can be surrounded by the first side 111 of the stator yoke 11 and the fourth side 132 of the stator tooth shoe 13 to form a part of the stator slot portion 14; in some embodiments, the fourth side 132 of the stator tooth shoe 13 and the portion corresponding to the one side of the stator tooth portion 12 extend in a straight line direction, and the one side of the stator tooth portion 12 also extends in a straight line direction, and there is an angle α between the corresponding portion of the fourth side 132 of the stator tooth shoe 13 and the one side of the stator tooth portion 12, that is, the slot shoulder angle of the single core 10, and the angle α is not less than 90° and not more than 135°; it can be understood that in the stator tooth shoe When the height of the edge of the stator tooth shoe 13 (i.e., the slot height of the stator slot 14) is a predetermined value, the angle α is greater than 135°, which will cause the winding coil to be unable to be completely filled in the stator slot 14, resulting in a large dispersion of the winding coil, thereby increasing the magnetic resistance of the motor component, reducing efficiency and increasing losses; when the height of the edge of the stator tooth shoe 13 (i.e., the slot height of the stator slot 14) is a predetermined value, the angle α is less than 90°, at this time, the magnetic density of the part of the stator core 100 close to the stator tooth shoe 13 (i.e., the crown part of the stator core 100) is high, and the local magnetic circuit is prone to saturation, resulting in a sharp increase in the magnetic resistance of the area, causing uneven distribution of magnetic flux density, and further increasing the loss of the stator core 100. Therefore, the angle α can be not less than 90° and not more than 135° to improve the working performance of the motor component; wherein the angle α can be 90°, 100°, 125°, 135°.

[0036] In addition, it should be noted that if one side of the stator tooth portion 12 extends in the curved direction, and the corresponding portion of the fourth side 132 of the stator tooth shoe 13 extends in the curved direction, then the two ends of one side of the stator tooth portion 12 and the two ends of the corresponding portion of the fourth side 132 of the stator tooth shoe 13 can be connected, that is, the angle between the two lines at the two ends of one side and the two ends of the corresponding portion of the fourth side 132 is α.

[0037] Reference Figures 1 to 3 In some embodiments of the utility model, the third side 131 extends in a direction around the axis, and the third side 131 has a spacing R1 with the axis. In the projection of the stator core 100 on the predetermined surface, there is a distance B0 between the sides of two adjacent stator yokes 11, and the ratio of the distance B0 to the spacing R1 satisfies the condition of 0.01-0.15, and the predetermined surface is an arc surface centered on the axis. Such an arrangement can improve the working performance of the motor assembly.

[0038] Specifically, a plurality of single cores 10 are wound around the axis of the stator core 100 to form a circular stator core 100; in the single core 10, the third side 131 of the stator tooth shoe 13 extends in a direction around the axis and has a spacing R1 with the axis. It can be understood that R1 is the inner diameter of the stator core 100, and a stator slot 14 is formed between two adjacent single cores 10, and a notch of the stator slot 14 is formed between the side edges of the stator yoke 11 of the two adjacent stator cores 100, and has a distance B 0, the distance B0 is the width of the slot, wherein the ratio of the distance B0 to the spacing R1 may be not less than 0.01 and not greater than 0.15; specifically, when the spacing R1 is a predetermined value, when the ratio of the distance B0 to the spacing R1 is less than 0.01, the leakage magnetic flux of the motor assembly will increase, and the back electromotive force will decrease, thereby affecting the working efficiency of the motor assembly; when the spacing R1 is a predetermined value, when the ratio of the distance B0 to the spacing R1 is greater than 0.15, the motor cogging torque will increase, affecting the performance of the motor assembly. Therefore, the ratio of the distance B0 to the spacing R1 may be not less than 0.01 and not greater than 0.15 to improve the working performance of the motor assembly; wherein the ratio may be 0.01, 0.05, 0.10, 0.15.

[0039] Reference Figures 1 to 3 In some embodiments of the present invention, the second side 112 and the third side 131 extend in a direction around the axis, the second side 112 and the axis have a spacing R3, the third side 131 and the axis have a spacing R1, and the ratio of the spacing R3 to the spacing R1 is not less than 1.5 and not greater than 2.5; such an arrangement can improve the working performance of the motor assembly.

[0040] Specifically, a plurality of single cores 10 are wound around the axis of the stator core 100 to form a circular stator core 100; in the single core 10, the second side 112 of the stator yoke 11 and the third side 131 of the stator tooth shoe 13 extend in a direction around the axis, and have a spacing R3 and a spacing R1 with the axis respectively. It can be understood that R3 is the outer diameter of the stator core 100, and R1 is the inner diameter of the stator core 100, wherein the ratio of the spacing R3 to the spacing R1 is not less than 1.5 and not more than 2.5; specifically, when the spacing R1 is a predetermined value, when the ratio of the spacing R3 to the spacing R1 is less than 1.5, the size of the stator slot portion 14 of the stator core 100 will be reduced, the slot fill rate will be reduced, and the performance of the motor assembly will be reduced; when the spacing R1 is a predetermined value, when the ratio of the spacing R3 to the spacing R1 is greater than 2.5, the size of the motor assembly will be increased, resulting in more space occupied by the motor assembly, affecting the assembly of the motor assembly. Therefore, the ratio of the spacing R3 to the spacing R1 can be not less than 1.5 and not more than 2.5 to improve the working performance of the motor assembly; wherein the ratio can be 1.5, 1.6, 1.8, 2.0, 2.3, 2.5.

[0041] It should be supplemented that the second side 112 may extend along a tangent direction around the axis, and in this case, a distance R3 between the second side 112 and the axis may be an average value of distances between multiple points on the second side 112 and the axis.

[0042] Reference Figures 1 to 3 In some embodiments of the utility model, the first side 111 extends in a direction around the axis, the first side 111 and the axis have a spacing R2, the spacing R3 and the spacing R2 have a difference Bj, and the ratio of the difference Bj to the spacing R1 is not less than 0.1 and not greater than 0.25; such an arrangement can improve the working performance of the motor assembly.

[0043] Specifically, a plurality of single cores 10 are wound around the axis of the stator core 100 to form a circular stator core 100; in the single core 10, the first side 111 of the stator yoke 11 extends in the direction around the axis and has a spacing R2 with the axis. It can be understood that the first side 111 and the second side 112 of the stator yoke 11 both extend in the direction around the axis, and the difference Bj can be obtained by subtracting the spacing R1 between the first side 111 and the axis from the spacing R3 between the second side 112 and the axis. The difference Bj is the width dimension of the stator yoke 11, wherein the difference Bj is equal to the spacing R1. The ratio may be not less than 0.1 and not greater than 0.25; specifically, when the spacing R1 is a predetermined value, when the ratio of the difference Bj to the spacing R1 is less than 0.1, the magnetic flux density of the stator yoke 11 will increase, resulting in an increase in the loss of the stator core 100, and the stator yoke 11 has a relatively small width and low strength, resulting in vibration noise when the motor assembly is working; when the spacing R1 is a predetermined value, when the ratio of the difference Bk to the spacing R1 is greater than 0.25, the size of the stator slot 14 will become smaller, thereby affecting the slot fill rate, increasing the copper loss of the motor assembly, and affecting the working efficiency of the motor assembly. Therefore, the ratio of the difference Bj to the spacing R1 can be not less than 0.1 and not greater than 0.25 to improve the working performance of the motor assembly, wherein the ratio can be 0.1, 0.15, 0.2, 0.25.

[0044] It should be supplemented that the first side 111 may extend along a tangent direction around the axis, and in this case, the distance R2 between the first side 111 and the axis may be an average value of the distances between multiple points on the first side 111 and the axis.

[0045] Reference Figures 1 to 3 In some embodiments of the present invention, the third side 131 extends in a direction around the axis, the third side 131 has a spacing R1 with the axis, and the ratio of the width dimension Bt of the stator tooth portion 12 to the spacing R1 satisfies the condition of 0.1-0.25; such an arrangement can improve the working performance of the motor assembly.

[0046] Specifically, a plurality of single cores 10 are wound around the axis of the stator core 100 to form a circular stator core 100; in the single core 10, the third side 131 of the stator yoke 11 extends in a direction around the axis and has a spacing R1 with the axis. It can be understood that the spacing R1 is the outer diameter of the stator core 100, wherein the ratio of the width dimension Bt of the stator tooth portion 12 to the spacing R1 may be not less than 0.1 and not greater than 0.25; specifically, when the spacing R1 is a predetermined value, when the ratio of the width dimension Bt to the spacing R1 is less than 0.1 In this case, the magnetic flux density of the stator tooth 12 will increase, the saturation degree of the stator core 100 will increase, and the loss of the stator core 100 will increase, thereby reducing the working efficiency of the motor assembly, and because the width dimension of the stator tooth 12 is relatively small, its strength is also low; when the spacing R1 is a predetermined value, when the ratio of the width dimension Bt to the spacing R1 is greater than 0.25, the width dimension of the stator tooth 12 is relatively large, resulting in a reduction in the size of the stator slot 14, thereby reducing the slot fill rate, increasing the copper loss of the motor assembly, and reducing the working performance of the motor assembly. Therefore, the ratio of the width dimension Bt of the stator tooth 12 to the spacing R1 can be not less than 0.1 and not greater than 0.25 to improve the working performance of the motor assembly, wherein the ratio can be 0.1, 0.15, 0.2, 0.25.

[0047] In addition, it should be noted that the stator tooth portion 12 extends in the radial direction of the stator core 100 , and therefore the stator tooth portion 12 has a width dimension Bt in the direction along the tangent line in the direction around the axis.

[0048] Reference Figures 1 to 3 According to the motor assembly of the embodiment of the utility model, the motor assembly includes the stator core 100 in the above embodiment. By applying the above stator core 100, the cost of the motor assembly can be reduced and the working performance of the motor assembly can be improved.

[0049] Specifically, the stator core 100 includes a plurality of single cores 10, which are connected into strips. The stator yokes 11 of adjacent single cores 10 can be connected in a bendable manner. By bending the adjacent stator yokes 11, the plurality of single cores 10 are wound around the axis of the stator core 100 to form a circular stator core 100. The stator yoke 11 has a first side 111 and a second side 112 opposite to each other, the stator tooth shoe 13 has a third side 131 and a fourth side 132 opposite to each other, the stator tooth 12 is connected to the first side 111 and the fourth side 132 respectively, the first side 111 and the second side 112 of the stator yoke 11, and the third side 131 of the stator tooth shoe 13 can extend in the direction around the axis, and have a spacing R2, a spacing R3 and a spacing R1 with the axis respectively; wherein the ratio of the spacing R3 to the spacing R1 is not less than 1.5 and not greater than 2.5, so as to avoid the size of the motor component being too large, affecting the installation of the motor component, and also avoid the size of the stator slot 14 being too small, reducing the slot filling rate. In addition, the ratio of the difference Bj between the spacing R3 and the spacing R2 to the spacing R1 is not less than 0.1 and not greater than 0.25, so as to avoid the strength of the stator yoke 11 being lower than the predetermined requirement, and avoid the reduction of the slot filling rate being lower than the predetermined requirement. In addition, the ratio of the width dimension Bt of the stator teeth 12 to the spacing R1 is not less than 0.1 and not more than 0.25 to improve the working performance of the motor assembly.

[0050] In addition, in the circular stator core 100, there is a spacing B0 between the sides of adjacent stator tooth shoes 13, and the ratio of the spacing B0 to the spacing R1 is not less than 0.01 and not more than 0.15, so as to improve the working performance of the motor assembly. In addition, the slot shoulder angle α of the single core 10 is not less than 90° and not more than 135°, so as to improve the working performance of the motor assembly.

[0051] The main parameters of the stator core 100 in the embodiment of the present invention include the number of slots Q of the stator core 100, the inner diameter R1 of the stator core 100, the outer diameter R3 of the stator core 100, the width dimension Bt of the stator tooth portion 12, the width dimension Bj of the stator yoke portion 11, the slot width B0 of the stator slot portion, the slot shoulder angle α, and the slot height H0, and the main parameters of the stator core 100 satisfy the following relationship.

[0052] Specifically, the motor assembly may be a three-phase motor, so the number of slots in the stator core 100 is three or a multiple of three.

[0053] When the core inner diameter R1 is constant, if the ratio of the core outer diameter R3 to the core inner diameter R1 is too large, the motor outer diameter will increase, affecting the motor installation inside the water heater; if the ratio is too small, the corresponding motor slot size will be too small, reducing the slot fill rate and the motor performance. Among them, the ratio of the core outer diameter R3 to the inner diameter R1 can meet the condition of 1.5-2.5.

[0054] When the core inner diameter R1 is constant, the ratio of the core tooth width Bt to the core inner diameter is too large, the core slot size is too small, the slot fill rate is reduced, and the motor copper loss increases. Although the motor iron loss is reduced by increasing the tooth width, the total loss increases and the motor efficiency decreases; if the ratio is too small, the core tooth magnetic density increases, the core saturation increases, the core loss increases, the motor efficiency decreases, and the core strength deteriorates. Among them, the ratio of the core tooth width Bt to the inner diameter R1 meets the condition of 0.1-0.25.

[0055] When the core inner diameter R1 is constant, the ratio of the core yoke width to the core inner diameter is too large, the slot size becomes smaller, affecting the slot fill rate and increasing the motor copper loss; if the ratio is too small, the core yoke magnetic density increases, the core loss increases, and the yoke strength deteriorates, which may cause motor noise and vibration. Among them, the ratio of the core yoke width Bj to the inner diameter R1 meets the condition of 0.1-0.25.

[0056] When the core inner diameter R1 is constant, if the ratio of the slot width to the core inner diameter is too large, the motor cogging torque will increase; if the ratio is too small, the motor leakage will increase, the back electromotive force will decrease, and the motor efficiency will be affected. Among them, the ratio of the core slot width B0 to the inner diameter R1 satisfies the relationship of 0.01-0.15.

[0057] When the slot height H0 is constant, the slot shoulder angle α is too large, which affects the slot space and reduces the slot fill rate; if the slot shoulder angle α is too small, the magnetic density of the crown part of the stator core 100 is high, the local magnetic circuit may be saturated, and the motor iron loss increases. Among them, the slot shoulder angle α of the stator core 100 meets the condition of 90°≤α≤135°.

[0058] In some specific examples of the present invention, the first stator yoke 11 of the plurality of single cores 10 is provided with a first connection portion, and the last stator yoke 11 of the plurality of single cores 10 is provided with a second connection portion. When the plurality of single cores 10 are wound into a circular stator core 100, the first connection portion and the second connection portion can be connected, referring to Figures 1 to 3 The first connection portion and the second connection portion can be connected by snapping, and the side of the stator yoke 11 where the first connection portion is located is welded to the side of the stator yoke 11 where the second connection portion is located, thereby forming a circular stator core 100.

[0059] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0063] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A stator core, characterized in that: The invention comprises a plurality of single iron cores (10), wherein the plurality of single iron cores (10) are connected into a strip shape, wherein the single iron core (10) comprises a stator yoke (11), a stator tooth (12) connected to the stator yoke (11), and a stator tooth shoe (13) connected to the stator tooth (12), and adjacent stator yokes (11) are connected in a bendable manner so as to allow adjacent single iron cores (10) to be wound around the axis of the stator iron core.

2. The stator core according to claim 1, characterized in that: The stator yoke (11) has a first side (111) and a second side (112) opposite to each other, the stator tooth (12) is connected to the first side (111), and the first side (111) is recessed toward the second side (112) relative to a line connecting two ends of the first side (111).

3. The stator core according to claim 2, characterized in that: The first side edge (111) and the second side edge (112) are substantially concentric arcs.

4. The stator core according to claim 2, characterized in that: The stator tooth shoe (13) has a third side (131) and a fourth side (132) opposite to each other, the fourth side (132) being closer to the stator yoke (11) than the third side (131), and the third side (131) being recessed toward the fourth side (132) relative to a line connecting two ends of the third side (131).

5. The stator core according to claim 4, characterized in that: An included angle α is formed between the fourth side edge (132) of the stator tooth shoe (13) and the corresponding side edge of the stator tooth portion (12), and the included angle α is not less than 90° and not more than 135°.

6. The stator core according to claim 4, characterized in that: The third side (131) extends in a direction around the axis, and a spacing R1 is formed between the third side (131) and the axis. In the projection of the stator core on a predetermined surface, a distance B0 is formed between the sides of two adjacent stator yoke parts (11), and a ratio of the distance B0 to the spacing R1 satisfies a condition of 0.01-0.

15. The predetermined surface is an arc surface centered on the axis.

7. The stator core according to claim 4, characterized in that: The second side (112) and the third side (131) extend in a direction around the axis, the second side (112) and the axis have a spacing R3, the third side (131) and the axis have a spacing R1, and the ratio of the spacing R3 to the spacing R1 is not less than 1.5 and not greater than 2.

5.

8. The stator core according to claim 7, characterized in that: The first side (111) extends in a direction around the axis, the first side (111) has a spacing R2 with the axis, the spacing R3 has a difference Bj with the spacing R2, and the ratio of the difference Bj to the spacing R1 is not less than 0.1 and not greater than 0.

25.

9. The stator core according to claim 4, characterized in that: The third side (131) extends in a direction around the axis, the third side (131) has a spacing R1 with the axis, and a ratio of a width dimension Bt of the stator tooth (12) to the spacing R1 satisfies a condition of 0.1-0.

25.

10. A motor assembly, characterized in that: The invention comprises a stator core as claimed in any one of claims 1 to 9.

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