Stator punching sheet, motor and washing machine

Abstract

The utility model relates to the technical field of motors, and discloses a stator punching sheet, a motor and a washing machine, the stator punching sheet comprises a stator yoke part, a plurality of stator tooth parts and wire embedding grooves, the outer contour line of the stator yoke part comprises a plurality of square tangent lines and a plurality of groups of inclined tangent lines which are connected in a staggered manner, the inner contour lines of the plurality of stator tooth parts form an inner circle, and the outer contour lines of the plurality of stator tooth parts form an outer circle. The bottom contour lines of the plurality of wire embedding grooves form a stator groove bottom circle; along the circumferential direction of the inner circle, the width of the stator tooth part is L1, and the width of an arc cut by a center line of two adjacent wire embedding grooves on the inner circle is L2, so that # imgabs0 # is favorable for reducing the size of the motor and reducing the cost of an electromagnetic material; in the radial direction of the stator slot bottom circle, the minimum distance between the square tangent line and the stator slot bottom circle is H1, the minimum distance between the inclined tangent line and the stator slot bottom circle is H2, and the condition that the magnetic saturation degree of a stator yoke part is relieved through # imgabs1 #, magnetic resistance and running current are reduced, and therefore the running efficiency of the motor is improved is met.

Description

Technical Field

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

[0002] In the relevant technology, the motor is a widely used actuator. For example, the pulsator washing machine uses a motor as the power unit. During the washing stage, the motor drives the pulsator to intermittently rotate forward and reverse. During the dehydration stage, the motor drives the pulsator to rotate at high speed for a certain period of time. The torque capacity, efficiency and temperature rise requirements of the motor are getting higher and higher. The temperature rise of the motor is related to the performance of the washing and dehydration stages. It is necessary to develop solutions to improve the motor efficiency and reduce the electromagnetic cost under specific temperature rise conditions. 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 proposes a stator punching sheet, which can help improve the efficiency of the motor and reduce the electromagnetic cost.

[0004] The utility model also provides a motor adopting the stator punching sheet.

[0005] The utility model also provides a washing machine using the motor.

[0006] According to the stator punching sheet of the embodiment of the first aspect of the utility model, it includes a stator yoke and a plurality of stator teeth, the outer contour line of the stator yoke includes a plurality of staggered square cutting lines and a plurality of groups of bevel cutting lines, and the extension lines of the plurality of square cutting lines can intersect and form a square; the plurality of stator teeth are located on the inner side of the stator yoke and are evenly distributed along the circumference of the stator yoke, a wire embedding groove is formed between two adjacent stator teeth, the inner contour lines of the plurality of stator teeth form an inner circle, and the bottom contour lines of the plurality of wire embedding grooves form a stator slot bottom circle; wherein, along the circumference of the inner circle, the width of the stator teeth is L1, and the width of the arc intercepted by the center line of two adjacent wire embedding grooves on the inner circle is L2, which satisfies: Along the radial direction of the bottom circle of the stator slot, the minimum distance between the square cutting edge line and the bottom circle of the stator slot is H1, and the minimum distance between the bevel cutting edge line and the bottom circle of the stator slot is H2, satisfying:

[0007] The stator punching sheet according to the first embodiment of the utility model has at least the following beneficial effects:

[0008] The stator laminations are designed with The width of the stator teeth is increased, which can carry more magnetic lines of force and increase the air gap magnetic flux amplitude, which is beneficial to reducing the size of the motor and reducing the cost of electromagnetic materials. The outer contour line of the stator yoke includes multiple staggered square cutting lines and multiple bevel cutting lines. In the production of stator punching sheets, they can be arranged closely to reduce material loss. The stator punching sheets are designed The stator yoke at the beveled edge is thicker, which can bear the increase in magnetic lines of force caused by the increase in the air gap magnetic flux amplitude, effectively alleviate the magnetic saturation of the stator yoke, reduce the magnetic resistance and operating current, and thus improve the operating efficiency of the motor.

[0009] According to some embodiments of the first aspect of the utility model, the radius of the inner circle is R, and the minimum distance between the center of the inner circle and the square tangent line is H3, satisfying:

[0010] According to some embodiments of the first aspect of the utility model, each group of the beveled edge lines is a straight line, and the angle between the beveled edge lines and the squared edge lines is 45°.

[0011] According to some embodiments of the first aspect of the utility model, each group of the beveled edge lines includes a first oblique line and a second oblique line connected to each other, and the angle between the first oblique line and the second oblique line is α, which satisfies: 90°<α<180°.

[0012] According to some embodiments of the first aspect of the utility model, a line connecting the intersection of the first oblique line and the second oblique line and the center of the inner circle is a median line, and the first oblique line and the second oblique line are symmetrically distributed about the median line.

[0013] According to some embodiments of the first aspect of the utility model, the line connecting the intersection of the first oblique line and the second oblique line and the center of the inner circle is a connecting line, the line connecting the endpoints of the first oblique line and the second oblique line away from the intersection is a branch line, and the angle between the connecting line and the branch line is less than 90°.

[0014] The motor according to the second aspect of the present invention comprises a stator, wherein the stator comprises the stator punching sheet described in the first aspect of the present invention.

[0015] According to some embodiments of the second aspect of the utility model, the motor includes a rotor, the rotor includes a rotor punching, the rotor punching is provided with a plurality of first ventilation holes and a plurality of second ventilation holes, the plurality of first ventilation holes are distributed at intervals along the circumference of the rotor punching, the plurality of second ventilation holes are distributed at intervals along the circumference of the rotor punching, the distance between the center of the first ventilation hole and the axis of the rotor punching is L3, the distance between the center of the second ventilation hole and the axis of the rotor punching is L4, satisfying: L3>L4.

[0016] According to some embodiments of the second aspect of the utility model, L3 and L4 satisfy: 0.5mm≤L3-L4≤3mm.

[0017] According to some embodiments of the second aspect of the utility model, the number of the first ventilation holes and the number of the second ventilation holes are equal, and a plurality of the first ventilation holes and a plurality of the second ventilation holes are staggeredly distributed along the circumferential direction of the rotor.

[0018] According to some embodiments of the second aspect of the utility model, a plurality of circumferentially evenly distributed rotor teeth are provided on the outer periphery of the rotor punching sheet, and along the circumference of the rotor punching sheet, the width of the rotor teeth is L5, the number of the rotor teeth is M, and the number of the stator teeth is N, satisfying: L5*M>L1*N.

[0019] A washing machine according to an embodiment of the third aspect of the utility model comprises the motor described in the embodiment of the second aspect.

[0020] 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

[0021] Additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 A schematic structural diagram of a stator punching sheet according to an embodiment of the first aspect of the utility model;

[0023] Figure 2 It is a schematic structural diagram of stator punching sheets of other embodiments of the first aspect of the utility model;

[0024] Figure 3 It is a structural schematic diagram of stator punching sheets of some other embodiments of the first aspect of the utility model;

[0025] Figure 4 It is a schematic diagram of the structure of the rotor punching in the embodiment of the second aspect of the utility model;

[0026] Figure 5 for Figure 1 Schematic diagram of production arrangement of stator punching sheets;

[0027] Figure 6 for Figure 2 Schematic diagram of the production arrangement of stator punchings.

[0028] The figures are as follows:

[0029] Stator punching sheet 100, wire embedding groove 101, inner circle 102, stator slot bottom circle 103, stator yoke 110, square cutting edge line 111, bevel cutting edge line 112, first oblique line 1121, second oblique line 1122, center dividing line 1123, connecting line 1124, tapping line 1125, stator tooth 120;

[0030] Rotor punching 200 , first ventilation hole 201 , second ventilation hole 202 , conductor slot 203 , rotor tooth 210 . DETAILED DESCRIPTION

[0031] 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.

[0032] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, 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.

[0033] 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.

[0034] 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.

[0035] Motors are important power units in industrial equipment and are widely used in various types of industrial equipment. For example, in the field of household appliances, for example, a pulsator washing machine uses a motor as a power unit. During the washing stage, the motor drives the pulsator to intermittently rotate forward and reverse to wash clothes. During the dehydration stage, the motor drives the pulsator to rotate at high speed for a certain period of time to separate water and clothes. With the development of washing machine technology, the torque capacity, efficiency and temperature rise requirements of the motor are getting higher and higher. The temperature rise of the motor is related to the performance of the washing and dehydration stages. It is necessary to develop solutions to improve motor efficiency and reduce electromagnetic costs under specific temperature rise conditions.

[0036] To this end, the embodiment of the first aspect of the utility model proposes a stator punching sheet, which can improve the operating efficiency of the motor on the one hand and reduce the cost of electromagnetic materials on the other hand by optimizing the structural design of the stator punching sheet.

[0037] Reference Figure 1 The embodiment of the first aspect of the utility model proposes a stator punching sheet 100, which includes a stator yoke 110 and a plurality of stator teeth 120. The plurality of stator teeth 120 are located on the inner side of the stator yoke 110 and are evenly distributed along the circumference of the stator yoke 110, and a wire embedding groove 101 is formed between two adjacent stator teeth 120. The stator of the motor is usually a stator core formed by stacking a plurality of stator punching sheets 100, and then the winding is installed in the stator core, wherein the winding is installed on the stator tooth 120 of the stator punching sheet 100, and the wire embedding groove 101 accommodates the winding. It can be understood that, if Figure 1 As shown, the wire trough 101 has two specifications, including a large wire trough and a small wire trough. For example, the total number of wire troughs 101 is 24, which are divided into 8 groups, each group including 2 small wire troughs and 1 large wire trough. The 2 small wire troughs are distributed on both sides of the large wire trough. The large wire trough can be provided to install more wires.

[0038] It can be understood that, on the axial section of the stator punching sheet 100, the outer contour line of the stator yoke 110 includes multiple square cutting lines 111 and multiple groups of bevel cutting lines 112, and the multiple square cutting lines 111 and the multiple groups of bevel cutting lines 112 are staggered, that is, both ends of each square cutting line 111 are connected to the bevel cutting line 112, wherein the square cutting line 111 is in the vertical direction or the horizontal direction, and the extension lines of the multiple square cutting lines 111 can intersect and form a square; the inner contour lines of the multiple stator teeth 120 form an inner circle 102, and the space corresponding to the inner circle 102 is the space where the rotor of the motor is located, and the bottom contour lines of the multiple wire embedding grooves 101 form a stator slot bottom circle 103, wherein it should be understood that if the wire embedding grooves 101 adopt large wire grooves and small wire grooves, the stator slot bottom circle 103 corresponds to the bottom contour line of the small wire groove.

[0039] It can be understood that in the design of the stator punching sheet 100, along the circumference of the inner circle 102, the width of the stator tooth portion 120 is L1, and the width of the arc intercepted by the bisection line of two adjacent wire-embedded grooves 101 on the inner circle 102 is L2, which satisfies: Compared with existing motors, the width of the stator teeth 120 is larger, and the stator can provide a larger channel area, which can carry more magnetic lines coupled to the stator, air gap and rotor, and improve the air gap magnetic flux amplitude of the motor, which is beneficial to reducing the size of the motor, reducing the amount of electromagnetic materials used, and reducing the cost of electromagnetic materials.

[0040] The outer contour line of the stator yoke 110 of the stator punching sheet 100 is a plurality of square cutting edges 111 and a plurality of bevel cutting edges 112 connected in an interlaced manner. Figure 6 In the production arrangement of the stator punching sheets 100, two rows are arranged and staggered, and grooves are formed between two adjacent stator punching sheets 100 in the same row, and the stator punching sheets 100 in the other row can be inserted into the grooves, so that the two rows of stator punching sheets 100 are arranged more closely, which helps to reduce material loss; in addition, the arrangement can also be three rows, four rows, etc.

[0041] Along the radial direction of the stator slot bottom circle 103, the minimum distance between the square cutting edge line 111 and the stator slot bottom circle 103 is H1, and the minimum distance between the bevel cutting edge line 112 and the stator slot bottom circle 103 is H2, which satisfies: In the design of the stator punching sheet 100, the thickness of the stator yoke 110 corresponding to the bevel edge line 112 is larger. Accordingly, the stator yoke 110 at the bevel edge line 112 can bear the increase in magnetic lines of force brought about by the increase in the air gap magnetic flux amplitude, which can effectively alleviate the magnetic saturation degree of the stator yoke 110 and avoid excessive magnetic saturation, which helps to reduce the magnetic resistance and operating current of the entire magnetic circuit of the motor, thereby improving the operating efficiency of the motor.

[0042] It should be understood that the stator sheet 100 is designed to meet the requirements of and The two formulas are closely related. The design of the stator tooth portion 120 is wider, the stator can provide a larger channel area, can carry more magnetic lines coupled to the stator, air gap and rotor, improve the air gap magnetic flux amplitude of the motor, and obtain the technical effect of reducing electromagnetic consumables. However, the increase in the air gap magnetic flux amplitude will cause excessive magnetic saturation of the stator yoke 110, so the use of The design of the stator yoke 110 at the beveled edge 112 can bear the incremental magnetic lines of force brought about by increasing the air gap magnetic flux amplitude, can effectively alleviate the magnetic saturation degree of the stator yoke 110, avoid excessive magnetic saturation, and help reduce the magnetic resistance and operating current of the entire magnetic circuit of the motor, thereby achieving the technical effect of improving efficiency. The motor can simultaneously reduce the cost of electromagnetic materials and improve efficiency, has better performance, and meets the use requirements.

[0043] It is understandable that, referring to Figure 1 In some embodiments of the first aspect of the present invention, the radius of the inner circle 102 is defined as R, and the minimum distance between the center of the inner circle 102 and the square tangent line 111 is H3, which satisfies the following design requirements: The ratio of R to H3 is called the split ratio of the stator punching sheet 100. The split ratio is designed to be greater than or equal to 0.59, limiting the space occupied by the inner circle 102, and reserving enough space for the stator yoke 110 and the multiple stator teeth 120, so that the overall thickness of the stator yoke 110 is relatively large, which can carry the increase in magnetic lines of force brought by the increase in the air gap magnetic flux amplitude, and can effectively alleviate the magnetic saturation degree of the stator yoke 110, avoid excessive magnetic saturation, and help reduce the magnetic resistance and operating current of the entire magnetic circuit of the motor, thereby improving the operating efficiency of the motor. In addition, sufficient layout space is reserved for the wire slot 101, and the wire slot 101 can adopt a structure combined with large wire slots and small wire slots, which helps to improve the performance of the motor.

[0044] Reference Figure 1 In some embodiments of the first aspect of the present invention, each group of beveled edge lines 112 is a straight line, and the angle between the beveled edge lines 112 and the squared edge lines 111 is 45°, that is, the angles between the beveled edge lines 112 and the squared edge lines 111 at both ends are 45°. Figure 5 Since the angle between the chamfered edge line 112 and the squared edge line 111 is 45°, when arranging the material, the two rows of stator punching sheets 100 can be spliced ​​so that the chamfered edge lines 112 of the two stator punching sheets 100 are adjacent, which can maximize the use of electromagnetic materials. Figure 1 As shown, the stator punching sheet 100 has four beveled edges 112 and four square cut edges 111, the four beveled edges 112 have inscribed circles, the four square cut edges 111 also have inscribed circles, and the inscribed circles of the four beveled edges 112 are larger than the inscribed circles of the four square cut edges 111, so that the stator yoke 110 at the beveled edges 112 has a larger thickness. Accordingly, the stator yoke 110 at the beveled edges 112 can carry the incremental magnetic lines of force brought about by the increased air gap magnetic flux amplitude, and can effectively alleviate the magnetic saturation degree of the stator yoke 110, avoid excessive magnetic saturation, and help reduce the magnetic resistance and operating current of the entire magnetic circuit of the motor, thereby improving the operating efficiency of the motor.

[0045] In addition, it can be understood that the angle between the beveled edge line 112 and the square cut edge line 111 can also be other angles, for example, the angle between the beveled edge line 112 and the square cut edge line 111 on one side is 40°, and the angle between the beveled edge line 112 and the square cut edge line 111 on the other side is 50°. As long as the minimum distance between the beveled edge line 112 and the stator slot bottom circle 103 is greater than the minimum distance between the square cut edge line 111 and the stator slot bottom circle 103, the stator yoke 110 at the beveled edge line 112 can carry the increase in magnetic lines of force brought about by the increase in the air gap magnetic flux amplitude, and the magnetic saturation degree of the stator yoke 110 can be effectively alleviated to avoid excessive magnetic saturation, which helps to reduce the magnetic resistance and operating current of the entire magnetic circuit of the motor, thereby improving the operating efficiency of the motor.

[0046] Reference Figure 2 In some other embodiments of the first aspect of the utility model, each group of beveled edge lines 112 includes two sections of beveled lines, which are divided into a first beveled line 1121 and a second beveled line 1122 connected to each other. The angle between the first beveled line 1121 and the second beveled line 1122 is α, which satisfies: 90°<α<180°, so that the thickness of the stator yoke 110 corresponding to the beveled edge line 112 gradually increases from the end connected to the square beveled edge line 111 to the intersection of the first beveled line 1121 and the second beveled line 1122. It can be seen that the minimum distance between the beveled edge line 112 and the stator slot bottom circle 103 is located at the connection between the beveled edge line 112 and the square beveled edge line 111, and the design satisfies: The stator yoke 110 at the beveled edge 112 can carry the incremental magnetic lines of force brought about by increasing the air gap magnetic flux amplitude, which can effectively alleviate the magnetic saturation degree of the stator yoke 110 and avoid excessive magnetic saturation, thereby helping to reduce the magnetic resistance and operating current of the entire magnetic circuit of the motor, thereby improving the operating efficiency of the motor.

[0047] It is understandable that if Figure 2 As shown, the intersection of the first oblique line 1121 and the second oblique line 1121 and the line connecting the center of the inner circle 102 is the midline 1123, and the first oblique line 1121 and the second oblique line 1122 are symmetrically distributed about the midline 1123, that is, the lengths of the first oblique line 1121 and the second oblique line 1121 are consistent, and the thickness of the stator yoke 110 corresponding to the beveled edge line 112 changes more regularly.

[0048] Reference Figure 3 In some further embodiments of the first aspect of the utility model, each group of beveled edge lines 112 includes two sections of beveled lines, which are divided into a first beveled line 1121 and a second beveled line 1122 connected to each other. The line connecting the intersection of the first beveled line 1121 and the second beveled line 1122 and the center of the inner circle 102 is a connecting line 1124. The line connecting the endpoints of the first beveled line 1121 and the second beveled line 1122 away from the intersection is a tapping line 1125. The angle between the connecting line 1124 and the tapping line 1125 is less than 90°, that is, the lengths of the first beveled line 1121 and the second beveled line 1122 are different, and the angle between the first beveled line 1121 and the square beveled edge line 111 is not equal to the angle between the second beveled line 1122 and the square beveled edge line 111.

[0049] A second aspect of the utility model discloses a motor, which includes a stator and a rotor. The rotor is located inside the stator and can rotate relative to the stator. The stator includes a stator punching sheet 100 of the first aspect. The stator punching sheet 100 includes a stator yoke 110 and a plurality of stator teeth 120. The plurality of stator teeth 120 are located on the inner side of the stator yoke 110 and are evenly distributed along the circumference of the stator yoke 110. A wire embedding groove 101 is formed between two adjacent stator teeth 120.

[0050] It can be understood that, on the axial section of the stator punching sheet 100, the outer contour line of the stator yoke 110 includes a plurality of square cut edges 111 and a plurality of bevel cut edges 112, and the plurality of square cut edges 111 and the plurality of bevel cut edges 112 are staggered, that is, both ends of each square cut edge 111 are connected to the bevel cut edges 112, wherein the extension lines of the plurality of square cut edges 111 can intersect and form a square; the inner contour lines of the plurality of stator teeth 120 form an inner circle 102, and the space corresponding to the inner circle 102 is the space where the rotor of the motor is located, and the bottom contour lines of the plurality of wire embedding grooves 101 form a stator slot bottom circle 103.

[0051] It can be understood that in the design of the stator punching sheet 100, along the circumference of the inner circle 102, the width of the stator tooth portion 120 is L1, and the width of the arc intercepted by the bisection line of two adjacent wire-embedded grooves 101 on the inner circle 102 is L2, which satisfies: Compared with the existing motors, the width of the stator teeth 120 is larger, and the stator can provide a larger channel area, can carry more magnetic lines coupled to the stator, air gap and rotor, and improve the air gap magnetic flux amplitude of the motor, which is conducive to reducing the size of the motor, reducing the amount of electromagnetic materials, reducing the cost of electromagnetic materials, and improving the competitiveness of the motor. Along the radial direction of the stator slot bottom circle 103, the minimum distance between the square cut edge line 111 and the stator slot bottom circle 103 is H1, and the minimum distance between the bevel cut edge line 112 and the stator slot bottom circle 103 is H2, which satisfies: In the design of the stator punching sheet 100, the thickness of the stator yoke 110 corresponding to the bevel edge line 112 is larger. Accordingly, the stator yoke 110 at the bevel edge line 112 can bear the increase in magnetic lines of force brought about by the increase in the air gap magnetic flux amplitude, which can effectively alleviate the magnetic saturation degree of the stator yoke 110 and avoid excessive magnetic saturation, which helps to reduce the magnetic resistance and operating current of the entire magnetic circuit of the motor, thereby improving the operating efficiency of the motor.

[0052] It is understandable that usually the rotor punching has only one type of ventilation hole, and multiple ventilation holes are distributed along the same circumferential line, and the distance between the ventilation holes and the conductor slots of the rotor punching is equal. The ventilation holes hinder the distribution of magnetic wires and affect the circulation of magnetic wires.

[0053] Therefore, refer to Figure 4In some embodiments of the second aspect of the present invention, the rotor includes a rotor punching 200, the rotor punching 200 is provided with a plurality of first ventilation holes 201 and a plurality of second ventilation holes 202, the outer periphery of the rotor punching 200 is provided with a plurality of circumferentially uniformly distributed rotor teeth 210, a conductor slot 203 is formed between two adjacent rotor teeth 210, the first ventilation holes 201 and the second ventilation holes 202 can be circular holes, the plurality of first ventilation holes 201 are distributed along a circumferential line, and the plurality of second ventilation holes 202 are also distributed along a circumferential line. Line distribution, the distance between the center of the first ventilation hole 201 and the axis of the rotor punching 200 is L3, the distance between the center of the second ventilation hole 202 and the axis of the rotor punching 200 is L4, satisfying: L3>L4, that is, the diameters of the two circular lines are not equal, the second ventilation hole 202 is closer to the axis of the rotor punching 200, and thus the distance between the second ventilation hole 202 and the conductor slot 203 is larger, with more space for the magnetic wire to pass through, which can reduce the impact on the circulation of the magnetic wire and help improve the performance of the motor.

[0054] Among them, L3 and L4 are designed to meet the following requirements: 0.5mm≤L3-L4≤3mm, that is, the distance between the second ventilation hole 202 and the conductor slot 203 is increased by 0.5mm to 3mm. Under the premise of meeting the ventilation and heat dissipation requirements, the space for the magnetic wire to pass through is increased as much as possible. The specific size can be determined according to the size of the motor.

[0055] It is understandable that the number of the first ventilation holes 201 and the second ventilation holes 202 may be equal, and the plurality of first ventilation holes 201 and the plurality of second ventilation holes 202 may be staggeredly distributed along the circumference of the rotor. Figure 4 As shown, the rotor punching 200 is provided with two first ventilation holes 201 and four second ventilation holes 202 , and a second ventilation hole 202 is distributed on both sides of each first ventilation hole 201 .

[0056] In addition, by adopting a staggered layout of multiple first ventilation holes 201 and multiple second ventilation holes 202, the distance between adjacent first ventilation holes 201 and second ventilation holes 202 can be increased, providing more space for the magnetic wire to pass through, which can reduce the impact on the circulation of the magnetic wire and help improve the performance of the motor.

[0057] It can be understood that in some embodiments of the second aspect of the present invention, along the circumference of the rotor punching 200, the width of the rotor tooth 210 is L5, the number of the rotor teeth 210 is M, and the number of the stator teeth 120 is N, satisfying: L5*M>L1*N. For example, the number of the stator teeth 120 is 24, and the number of the rotor teeth 210 is 30. According to L5*M>L1*N, the total width of the rotor teeth 210 is greater than the total width of the stator teeth 120, and all the rotor teeth 210 have a larger space for the magnetic wire to pass through, which is beneficial for the magnetic wire to pass through the air gap into the stator teeth 120, thereby increasing the air gap magnetic flux amplitude and helping to improve the performance of the motor.

[0058] The third embodiment of the utility model proposes a washing machine, which includes the motor of the second embodiment. The motor improves the stator punching sheet 100 of the stator and the rotor punching sheet 200 of the rotor, so that the width of the stator teeth 120 of the stator punching sheet 100 is larger, and the stator can provide a larger channel area, can carry more magnetic lines coupled to the stator, the air gap and the rotor, and improve the air gap magnetic flux amplitude of the motor, which is conducive to reducing the size of the motor, reducing the amount of electromagnetic materials, and reducing the cost of electromagnetic materials. The thickness of the stator yoke 110 corresponding to the bevel edge line 112 is larger, and accordingly, the stator yoke 110 at the bevel edge line 112 can carry the magnetic line increment brought by the increase in the air gap magnetic flux amplitude, which can effectively alleviate the magnetic saturation degree of the stator yoke 110, avoid excessive magnetic saturation, and help reduce the magnetic resistance and operating current of the entire magnetic circuit of the motor, thereby improving the operating efficiency of the motor. The second ventilation hole 202 of the rotor punching 200 is closer to the axis of the rotor punching 200, and the distance between the second ventilation hole 202 and the conductor slot 203 is larger, providing a larger space for the magnetic wire to pass through, which can reduce the impact on the circulation of the magnetic wire and help improve the performance of the motor.

[0059] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Stator punching, characterized in that: include: A stator yoke, wherein the outer contour line of the stator yoke includes a plurality of staggered square cutting lines and a plurality of groups of bevel cutting lines, and the extension lines of the plurality of square cutting lines can intersect and form a square; A plurality of stator teeth, the plurality of stator teeth are located inside the stator yoke and are evenly distributed along the circumference of the stator yoke, a wire embedding groove is formed between two adjacent stator teeth, the inner contour lines of the plurality of stator teeth form an inner circle, and the bottom contour lines of the plurality of wire embedding grooves form a stator slot bottom circle; Wherein, along the circumference of the inner circle, the width of the stator tooth portion is L1, and the width of the arc intercepted by the center line of two adjacent wire-embedded grooves on the inner circle is L2, satisfying: Along the radial direction of the bottom circle of the stator slot, the minimum distance between the square cutting edge line and the bottom circle of the stator slot is H1, and the minimum distance between the bevel cutting edge line and the bottom circle of the stator slot is H2, satisfying:

2. The stator sheet according to claim 1, characterized in that: The radius of the inner circle is R, and the minimum distance between the center of the inner circle and the square tangent line is H3, satisfying:

3. The stator sheet according to claim 1, characterized in that: Each group of the beveled edge lines is a straight line, and the angle between the beveled edge lines and the squared edge lines is 45°.

4. The stator sheet according to claim 1, characterized in that: Each group of the beveled edge lines includes a first oblique line and a second oblique line connected to each other, and the angle between the first oblique line and the second oblique line is α, which satisfies: 90°<α<180°.

5. The stator sheet according to claim 4, characterized in that: A line connecting the intersection of the first oblique line and the second oblique line and the center of the inner circle is a median line, and the first oblique line and the second oblique line are symmetrically distributed about the median line.

6. The stator sheet according to claim 4, characterized in that: The line connecting the intersection of the first oblique line and the second oblique line and the center of the inner circle is a connecting line, the line connecting the endpoints of the first oblique line and the second oblique line away from the intersection is a branch line, and the angle between the connecting line and the branch line is less than 90°.

7. A motor, characterized in that A stator is included, wherein the stator includes the stator sheet according to any one of claims 1 to 6.

8. The motor according to claim 7, characterized in that The motor includes a rotor, and the rotor includes a rotor punching. The rotor punching is provided with a plurality of first ventilation holes and a plurality of second ventilation holes. The plurality of first ventilation holes are distributed at intervals along the circumference of the rotor punching, and the plurality of second ventilation holes are distributed at intervals along the circumference of the rotor punching. The distance between the center of the first ventilation hole and the axis of the rotor punching is L3, and the distance between the center of the second ventilation hole and the axis of the rotor punching is L4, satisfying: L3>L4.

9. The motor according to claim 8, characterized in that The L3 and the L4 satisfy: 0.5mm≤L3-L4≤3mm.

10. The motor according to claim 8, characterized in that The number of the first ventilation holes and the number of the second ventilation holes are equal, and a plurality of the first ventilation holes and a plurality of the second ventilation holes are staggeredly distributed along the circumferential direction of the rotor.

11. The motor according to claim 8, characterized in that The outer circumference of the rotor punching is provided with a plurality of circumferentially evenly distributed rotor teeth. Along the circumference of the rotor punching, the width of the rotor teeth is L5, the number of the rotor teeth is M, and the number of the stator teeth is N, satisfying: L5*M>L1*N.

12. A washing machine, characterized in that Comprising the electric machine as claimed in any one of claims 7 to 11.

Images