Stator core, motor and household appliance

Abstract

The utility model discloses a stator core, a motor and a household electrical appliance, and relates to the technical field of motors. The stator core comprises a plurality of punching sheet sections and a plurality of first reinforcing parts, the magnetic conduction sections provided with the plurality of punching sheet sections are sequentially connected in the circumferential direction of the stator core, the stator teeth are connected to the inner sides of the magnetic conduction sections, a seam is formed between every two adjacent magnetic conduction sections, and the seams are of a structure formed by the yoke parts at the receding grooves. All the magnetic conductive sections form a yoke part, and the first reinforcing part is connected to the outer side of the yoke part and extends in the axial direction of the stator iron core. The plurality of first reinforcing parts are arranged at intervals along the circumferential direction of the stator core, and the extension line of the seam passes through the first reinforcing parts, so that the first reinforcing parts can increase the structural strength of the stator core at the seam, thereby improving the rigidity of the stator core, reducing the noise caused by the vibration of the stator core, and improving the user experience.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, in particular to a kind of stator core, motor and household appliance. BACKGROUND

[0002] Stator punching sheet can be produced using straight bar stator during manufacturing stage. For example, the shape of stator punching sheet is punched on plate, and then the stator punching sheet is separated from the plate. Since the preformed punching sheet is in straight bar shape, it needs to be bent into ring structure to form the stator punching sheet, and finally a plurality of stator punching sheets are stacked along the axial direction to form the stator core. Since the preformed punching sheet needs to be bent to form a complete stator punching sheet, a plurality of V-shaped accommodation grooves are provided between the yoke portions of the stator punching sheet to facilitate the bending of the straight bar stator punching sheet. The provision of the accommodation grooves results in a weak rigidity of the yoke portions at the accommodation grooves, which may cause the vibration of the stator core to intensify under the excitation of electromagnetic force, resulting in an increase in noise during the operation of the motor. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art. To this end, the utility model provides a stator core, which can improve the rigidity and reduce the noise caused by vibration.

[0004] The utility model further provides a motor and a household appliance having the above-mentioned stator core.

[0005] According to the stator core of the first aspect of the utility model, the plurality of punching segments include a magnetically conductive segment and a stator tooth, the stator tooth is connected to the inner side of the magnetically conductive segment, the plurality of punching segments are arranged along the circumferential direction of the stator core, and the magnetically conductive segments of adjacent punching segments are sequentially connected. The magnetically conductive segments of adjacent two punching segments form a joint extending along the radial direction of the stator core, and the magnetically conductive segments of the plurality of punching segments enclose a yoke portion. A plurality of first reinforcing portions are connected to the outer side of the yoke portion and arranged along the axial direction of the stator core. The first reinforcing portions are located on the extension line of the joint, and the plurality of first reinforcing portions are arranged at intervals along the circumferential direction of the stator core.

[0006] According to the stator core of the utility model, at least the following beneficial effects are achieved:

[0007] The magnetic conducting segments of the plurality of punching segments are sequentially connected along the circumferential direction of the stator core, and the stator teeth are connected to the inner side of the magnetic conducting segments, and a joint is formed between the adjacent two magnetic conducting segments, and the joint is a structure formed at the position of the clearance groove of the yoke. The magnetic conducting segments of the plurality of punching segments enclose the yoke, and the first reinforcing part is connected to the outer side of the yoke and is arranged along the axial direction of the stator core. Since the first reinforcing part is provided in plurality and is arranged at intervals along the circumferential direction of the stator core, and the first reinforcing part is on the extension line of the joint, the first reinforcing part can increase the structural strength of the stator core at the joint, so as to improve the rigidity of the stator core, thereby reducing the noise caused by the vibration of the stator core and improving the user experience.

[0008] According to some embodiments of the present application, the first reinforcing part is configured as a protrusion, and the protrusion is integrally formed on the outer side wall of the yoke.

[0009] According to some embodiments of the present application, the stator core comprises a plurality of stator punching sheets stacked along the axial direction, and the stator punching sheets are configured to be made of a long strip-shaped prefabricated punching sheet, the prefabricated punching sheet comprises a yoke sheet and a plurality of tooth sheets, the plurality of tooth sheets are connected to the same side of the yoke sheet and are arranged at intervals along the length direction of the yoke sheet, the same side of the yoke sheet and the tooth sheet is provided with a plurality of clearance grooves, the clearance grooves are located between adjacent tooth sheets, the clearance grooves have two inclined surfaces oppositely arranged along the length direction of the yoke sheet, the included angle between the two inclined surfaces is α, the maximum thickness of the yoke sheet is L, the maximum protrusion height of the protrusion is H, and H = L x tan (α / 2) + S is satisfied, and 0.05mm ≤ S ≤ 0.5mm.

[0010] According to some embodiments of the present application, along the radial direction of the stator core, the maximum protrusion height of the protrusion is H, and 3mm ≤ H ≤ 6mm is satisfied.

[0011] According to some embodiments of the present application, along the circumferential direction of the stator core, the maximum width of the protrusion is W1, and 6mm ≤ W1 ≤ 12mm is satisfied.

[0012] According to some embodiments of the present application, the protrusion is symmetrically arranged along the extension line of the joint.

[0013] According to some embodiments of the present application, the plurality of first reinforcing parts are uniformly and interval arranged along the circumferential direction of the stator core.

[0014] According to some embodiments of the present application, the stator core comprises a plurality of stator punching sheets stacked along the axial direction, and the outer side of the stator punching sheet is provided with at least one tab, and the tabs of the plurality of stator punching sheets are stacked along the axial direction and constitute the first reinforcing part.

[0015] According to some embodiments of the present application, the first reinforcing part is configured as a weld.

[0016] According to some embodiments of the present application, along the circumferential direction of the stator core, the maximum width of the weld is W2, satisfying: 1mm≤W2≤2mm.

[0017] According to the stator core of the second aspect of the present application, the stator core comprises a plurality of laminated stator laminations, the stator laminations comprising a yoke and a plurality of tooth pieces, the yoke being annular, the plurality of tooth pieces being connected to the inner side of the yoke and being arranged at intervals along the circumferential direction of the yoke, the yoke forming a joint extending in the radial direction of the stator core between any two adjacent tooth pieces, and the outer side of the yoke being provided with a plurality of tabs, the plurality of tabs being arranged at intervals along the circumferential direction of the yoke, and the tabs being located on the extension line of the joint.

[0018] According to the stator core of the present application, at least the following beneficial effects are achieved:

[0019] By arranging a plurality of stator laminations to be laminated along the axial direction of the stator core, the plurality of tooth pieces of the stator laminations are connected to the inner side of the yoke, the yoke forms a joint between any two adjacent tooth pieces, and the outer side of the yoke is provided with a plurality of tabs. Since the tabs are arranged at intervals along the circumferential direction of the yoke and are located on the extension line of the joint, the tabs can increase the structural strength of the stator core at the joint, thereby improving the rigidity of the stator core and reducing the noise caused by vibration of the stator core, thereby improving the user experience.

[0020] According to the motor of the third aspect of the present application, the motor comprises the stator core of the above-mentioned embodiments.

[0021] According to the motor of the present application, at least the following beneficial effects are achieved:

[0022] By using the stator core of the first aspect of the present application, the plurality of lamination segments are connected in sequence along the circumferential direction of the stator core, the stator teeth are connected to the inner side of the magnetic conducting segment, and the joint is formed between the two adjacent magnetic conducting segments. The joint is a structure formed at the accommodation groove of the yoke. The magnetic conducting segments of the plurality of lamination segments enclose the yoke, and the first reinforcing part is connected to the outer side of the yoke and extends along the axial direction of the stator core. Since the first reinforcing part is arranged at intervals along the circumferential direction of the stator core and is located on the extension line of the joint, the first reinforcing part can increase the structural strength of the stator core at the joint, thereby improving the rigidity of the stator core and reducing the noise caused by vibration of the stator core, thereby improving the user experience.

[0023] According to some embodiments of the utility model, the motor further includes a plastic part and an end cover, the plastic part is plasticized in the stator core, one end of the plastic part has an opening part, an end face of the opening part is provided with a stop flange arranged around a central axis of the stator core, an outer wall of the stop flange is provided with a mounting part for mounting a leg of the motor, an inner wall of the stop flange is configured as a continuous annular surface, and the annular surface is used for abutting cooperation with an abutting part of the end cover.

[0024] According to some embodiments of the utility model, a side wall of the plastic part is provided with a plurality of first mounting seats, the plurality of first mounting seats are arranged at intervals along a circumferential direction of the stator assembly, and one end of the first mounting seat towards the stop flange is provided with a first connecting hole used for connecting the end cover.

[0025] According to some embodiments of the utility model, the first mounting seat is arranged in an axial extension direction of the stator assembly, and the first connecting hole penetrates through two ends of the first mounting seat in an axial direction of the stator assembly.

[0026] According to some embodiments of the utility model, the mounting part is provided with a mounting groove, the mounting groove extends to the stop flange and the first mounting seat, the first connecting hole is located at a bottom wall of the mounting groove, and the first connecting hole is used for connecting the leg and the end cover.

[0027] According to some embodiments of the utility model, the end cover includes: a bearing part forming a bearing chamber; an abutting part connected to the bearing part and arranged around the bearing chamber, the abutting part and the inner wall of the stop flange abut and cooperate; a positioning flange connected to the abutting part and arranged around the abutting part, the positioning flange and the end face of the stop flange are positioned and matched; and a reinforcing part arranged at least one of the bearing part, the abutting part and the positioning flange.

[0028] According to some embodiments of the utility model, the reinforcing part includes a reinforcing rib, a convex rib and a reinforcing flange, the reinforcing rib is arranged at an end face of the bearing part, the convex rib is arranged at the abutting part, the convex rib is provided with a plurality of intervals and is arranged around the bearing chamber, and the reinforcing flange is connected to an edge of the positioning flange.

[0029] The household appliance according to the fourth aspect of the utility model has the motor described in the above embodiments.

[0030] The household appliance according to the embodiments of the utility model has at least the following beneficial effects:

[0031] By adopting the motor of the third aspect embodiment, the stator core of the motor is connected in sequence along the circumferential direction of the stator core through the magnetic conducting segments of the plurality of punching segments, and the stator tooth is connected to the inner side of the magnetic conducting segment, and the joint is formed between the adjacent two magnetic conducting segments, and the joint is the structure formed at the position of the clearance slot. The magnetic conducting segments of the plurality of punching segments enclose the yoke, and the first reinforcing part is connected to the outer side of the yoke and is arranged in extension along the axial direction of the stator core. Since the first reinforcing part is provided in plurality and is arranged in interval along the circumferential direction of the stator core, and the first reinforcing part is on the extension line of the joint, the first reinforcing part can increase the structural strength of the stator core at the joint, so as to improve the rigidity of the stator core, thereby reducing the noise caused by the vibration of the stator core and improving the use experience of the user.

[0032] Additional aspects and advantages of the present application will be set forth in part in the following description, and in part will become apparent to those skilled in the art upon examination of the following description, or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0033] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0034] Figure 1 is a structure schematic view of a prefabricated punching sheet of an embodiment of the present application;

[0035] Figure 2 is Figure 1 is an enlarged view of A in the figure;

[0036] Figure 3 is a structure schematic view of a stator punching sheet of an embodiment of the present application;

[0037] Figure 4 is Figure 3 is an enlarged view of B in the figure;

[0038] Figure 5 is a structure schematic view of a stator core of an embodiment of the present application;

[0039] Figure 6 is a structure schematic view of a stator punching sheet of another embodiment of the present application;

[0040] Figure 7 is a structure schematic view of a stator core of another embodiment of the present application;

[0041] Figure 8 is a structure schematic view of a stator assembly of an embodiment of the present application;

[0042] Figure 9 is a structure schematic view of a stator assembly and a leg connection of an embodiment of the present application;

[0043] Figure 10is a structure sectional view of a motor of an embodiment of the utility model;

[0044] Figure 11 is a structure schematic view of the motor after the embodiment of the utility model hides support leg;

[0045] Figure 12 is a structure schematic view of the end cover of the embodiment of the utility model;

[0046] Figure 13 is the end cover sectional view of the embodiment of the utility model.

[0047] Reference signs:

[0048] Stator core 100;Lamella segment 110;Magnetic conducting segment 111;Stator tooth 112;Yoke part 120;Joint 121;First reinforcing part 130;Convex 131;Weld 132;Stator punching sheet 150;Winding 160;Insulating frame 170;

[0049] Prefabricated punching sheet 200;Let go of groove 210;Bevel 211;Yoke piece 220;Tooth piece 230;Tab 240;

[0050] Motor 2000;Stator assembly 2100;

[0051] Plastic part 300;Opening part 301;Stop mouth boss 310;Positioning column 311;Mounting groove 320;Convex column 321;First mounting seat 330;First connecting hole 331;Second mounting seat 340;Second connecting hole 341;Mounting part 350;

[0052] End cover 400;Body 410;Bearing part 411;Bearing chamber 412;Butt joint part 413;First annular piece 414;Second annular piece 415;Positioning flange 416;Second reinforcing part 420;Reinforcing rib 421;Convex rib 422;Reinforcing flange 423;Connecting part 430;Third connecting hole 431;Positioning hole 432;

[0053] Support leg 500;Positioning groove 510;Fastener 520. Specific implementation

[0054] The embodiment of the utility model is described in detail below, the example of the embodiment is shown in the attached drawing, wherein the same or similar reference signs indicate the same or similar elements or elements with the same or similar function throughout. The embodiment described below by referring to the attached drawing is exemplary, only for explaining the utility model, and can not be understood as the limitation of the utility model.

[0055] In the description of the utility model, it needs to be understood that, the orientation description, such as the orientation or positional relationship of the indication of up, down, front, back, left, right etc. for the orientation or positional relationship shown in the drawing, is only for the convenience of describing the utility model and simplifying the description, and is not to indicate or imply that the device or element indicated must have a particular orientation, configuration and operation, therefore it can not be understood as the limitation of the utility model.

[0056] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than etc. are understood as not including the number, above, below, within etc. are understood as including the number.If there is a description to the first, second is only used for distinguishing technical features for the purpose, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0057] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0058] Referring to Figure 1 and Figure 2 The utility model discloses an embodiment's prefabricated punching sheet 200, and the prefabricated punching sheet 200 is long strip shape.Prefabricated punching sheet 200 includes yoke piece 220 and multiple tooth piece 230, and yoke piece 220 is also long strip shape.Multiple tooth piece 230 is connected to the same side of yoke piece 220, and is spaced apart along the length direction of yoke piece 220, and the side of yoke piece 220 connected with tooth piece 230 is equipped with multiple let -by slot 210, and let -by slot 210 is located between adjacent tooth piece 230.For example, one let -by slot 210 is equipped between every two adjacent tooth piece 230, and let -by slot 210 is V-shaped.It can be understood that, the prefabricated punching sheet 200 needs to be bent and connect two ends, to constitute the stator punching sheet 150 shown in Figure 3 Multiple stator punching sheet 150 is stacked along the axial direction again, to constitute the stator core 100 shown in Figure 4 Therefore, the let -by slot 210 arranged on the prefabricated punching sheet 200 can make the prefabricated punching sheet 200 bend smoothly, improve the fluency when the prefabricated punching sheet 200 is bent.

[0059] Because the connection strength of prefabricated punching sheet 200 at let -by slot 210 is weak, and the rigidity is weak, when being applied to motor 2000, the stator core 100 is easy to vibrate under the excitation of electromagnetic force, to cause the noise of complete machine to increase.In order to solve the problem of big noise, referring to Figure 3 and Figure 4As shown, the stator core 100 of the embodiment of the utility model can be used for motor 2000, such as plastic package motor 2000. The stator core 100 of the embodiment of the utility model includes punching piece segment 110 and first reinforcing portion 130, and punching piece segment 110 includes magnetic conducting segment 111 and stator tooth 112, and the magnetic conducting segment 111 can be in the shape of a straight strip or a curved arc segment. Stator tooth 112 is connected to the inner side of magnetic conducting segment 111, and the inner side of magnetic conducting segment 111 is the side of magnetic conducting segment 111 facing the central axis of the stator core 100. A plurality of punching piece segments 110 are arranged along the circumference of the stator core 100, and the magnetic conducting segments 111 of adjacent punching piece segments 110 are sequentially connected along the circumference of the stator core 100, and a joint 121 is formed between the two adjacent magnetic conducting segments 111, the joint 121 is formed by bending the relief groove 210, and the joint 121 is arranged along the radial direction of the stator core 100. The magnetic conducting segments 111 of the plurality of punching piece segments 110 enclose the yoke portion 120, i.e. the yoke portion 120 is annular.

[0060] The first reinforcing portion 130 is connected to the outer side of the yoke portion 120 and is arranged along the axial direction of the stator core 100, and a plurality of first reinforcing portions 130 are arranged along the circumference of the stator core 100. Among them, the first reinforcing portion 130 is located on the extension line of the joint 121, i.e. the first reinforcing portion 130 is arranged at the position close to the joint 121 between the two adjacent magnetic conducting segments 111, so as to increase the overall rigidity and strength of the stator core 100. Figure 4 It should be noted that the extension line of the joint 121 passes through the first reinforcing portion 130, and the extension line of all the joints 121 can pass through the corresponding first reinforcing portion 130, i.e. the number of joints 121 is the same as the number of first reinforcing portions 130. When the number of first reinforcing portions 130 is less than the number of joints 121, the extension line of part of the joints 121 passes through the first reinforcing portion 130 at the corresponding position.

[0061] It can be understood that, by adopting the above scheme, since the first reinforcing portion 130 is provided with a plurality of first reinforcing portions 130 and is arranged along the circumference of the stator core 100, the first reinforcing portion 130 can increase the structural strength of the stator core 100 at the joint 121, so as to improve the rigidity of the stator core 100, thereby reducing the noise generated by the excitation of the electromagnetic force of the stator core 100, and improving the user experience.

[0062] Referring to Figure 5 As shown, in the embodiment of the utility model, the first reinforcing portion 130 is configured as a protrusion 131, the protrusion 131 is integrally formed on the outer side wall of the yoke portion 120, and the protrusion 131 is arranged along the axial direction of the stator core 100. For example, referring to Figure 2As shown, the yoke portion 120 of the pre-punched sheet 200 is provided with tabs 240 on the side away from the tooth sheet 230, and the tabs 240 are located close to the clearance groove 210. After the pre-punched sheet 200 is made into the stator sheet 150, a plurality of stator sheets 150 are stacked in the axial direction, and the tabs 240 are also stacked in the axial direction to form the protrusion 131 shown in FIG. 1. Therefore, the protrusion 131 can improve the rigidity and strength of the yoke portion 120 at the joint 121, and the overall rigidity and strength of the stator core 100 can also be improved to reduce the noise generated by the stator core 100 due to the excitation of electromagnetic force. It should be noted that an insulating layer can be provided between adjacent stator sheets 150 to reduce the eddy current loss of the stator core 100 and improve the overall mechanical strength and stability of the stator core 100. Therefore, the tabs 240 between adjacent tabs 240 are not directly connected, but are connected through an insulating layer, which improves the overall strength and rigidity of the stator core 100 while reducing energy loss. Figure 5 As shown, the yoke portion 120 of the pre-punched sheet 200 is provided with tabs 240 on the side away from the tooth sheet 230, and the tabs 240 are located close to the clearance groove 210. After the pre-punched sheet 200 is made into the stator sheet 150, a plurality of stator sheets 150 are stacked in the axial direction, and the tabs 240 are also stacked in the axial direction to form the protrusion 131 shown in FIG. 1. Therefore, the protrusion 131 can improve the rigidity and strength of the yoke portion 120 at the joint 121, and the overall rigidity and strength of the stator core 100 can also be improved to reduce the noise generated by the stator core 100 due to the excitation of electromagnetic force. It should be noted that an insulating layer can be provided between adjacent stator sheets 150 to reduce the eddy current loss of the stator core 100 and improve the overall mechanical strength and stability of the stator core 100. Therefore, the tabs 240 between adjacent tabs 240 are not directly connected, but are connected through an insulating layer, which improves the overall strength and rigidity of the stator core 100 while reducing energy loss.

[0063] Referring to FIG. 1, Figure 3 In the embodiments of the present application, a plurality of first reinforcing portions 130 are uniformly and spacedly arranged in the circumferential direction of the stator core 100. For example, the first reinforcing portion 130 includes a protrusion 131, and the number of joints 121 of the stator core 100 is 12, and one joint 121 is formed between each adjacent two stator teeth 112. The number of protrusions 131 is 6, and one protrusion 131 is provided every other joint 121. That is, the protrusion 131 and the joint 121 are correspondingly arranged, and the joint 121 between each adjacent two protrusions 131 is not provided with a protrusion 131. It can be understood that the force required for bending the pre-punched sheet 200 will increase after the protrusion 131 is provided, and the bending difficulty will increase, which is not conducive to the production of the stator sheet 150. Therefore, the number of protrusions 131 is reasonably designed, for example, only six, to ensure that the force required for bending the pre-punched sheet 200 will not increase too much, and at the same time, the overall strength and rigidity of the stator core 100 can be improved. In other embodiments, the number of protrusions 131 can also be two, three, four, etc., and the appropriate scheme is selected according to the actual situation.

[0064] Table 1: Effect of different numbers of protrusions 131 on the inherent frequency noise of the stator core 100

[0065]

[0066] It should be noted that since the stator core 100 is cylindrical, the second-order elliptical mode can better reflect its natural frequency. The tested motor 2000 is an 8-pole, 12-slot motor, so the 8th-order electromagnetic noise can more accurately reflect the noise level of the motor 2000. Table 1 shows that when the stator core 100 has no protrusions 131, its natural frequency in the second-order elliptical mode is 181Hz. With four protrusions 131, the natural frequency increases to 540Hz, an increase of approximately 198.34%, while the noise level decreases from 43dB to 41dB. Adding six and twelve protrusions 131 also increases the natural frequency of the stator core 100. Specifically, the natural frequency increased by 14.8% when six protrusions 131 were used compared to when four protrusions 131 were used, and the natural frequency increased by 19.4% when twelve protrusions 131 were used compared to when six protrusions 131 were used. This shows that the increase in natural frequency and the decrease in noise both slowed down. Therefore, considering factors such as cost, manufacturing difficulty, and noise levels, a reasonable design of the number of protrusions 131 can reduce noise while ensuring that the manufacturing difficulty and cost of the stator core 100 do not increase significantly.

[0067] Since the height of protrusion 131 affects the force required to bend the preformed lamination 200, in order to rationally design the height of protrusion 131, refer to Figure 2 As shown, in this embodiment of the present invention, the clearance groove 210 has two opposing inclined surfaces 211 along the length direction of the yoke 220, the included angle between the two inclined surfaces 211 is α, the maximum thickness of the yoke 220 is L, and the maximum protrusion height of the protrusion 131 is H, satisfying: H=L×tan(α / 2)+S, 0.05mm≤S≤0.5mm, for example, the value of S can be 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, or 0.5mm. It should be noted that when the yoke 220 is in the form of multiple arc segments, that is, after bending, the structure is as follows: Figure 3 When the yoke 220 is in the arc shape, the maximum thickness of the yoke 220 refers to the maximum thickness along the radial direction of the stator core 100. When the yoke 220 is in the straight strip shape, that is, when the yoke 120 is bent into a polygonal structure, the maximum thickness of the yoke 220 refers to the maximum thickness along the direction perpendicular to the outer wall of the yoke 220.

[0068] It can be understood that the maximum height of the protrusion 131 can be calculated by adding S to the value calculated according to the included angle of the displacement slot 210 and the maximum thickness of the yoke piece 220. When H is less than L x tan (α / 2) + S, that is, the protrusion height of the protrusion 131 is relatively low, it is difficult to increase the strength and rigidity of the stator core 100, and there is no obvious improvement on the noise problem. When H is greater than L x tan (α / 2) + S, the force required for bending the preformed punching sheet 200 increases, the bending difficulty increases, and it is not conducive to the production of the stator punching sheet 150. Therefore, by designing H = L x tan (α / 2) + S, the strength and rigidity of the stator core 100 can be increased, and at the same time, the force required for bending the preformed punching sheet 200 is ensured to be of an appropriate size, which is conducive to the production and manufacturing of the stator punching sheet 150.

[0069] In the embodiment of the utility model, the maximum width W1 of the protrusion 131 can be about twice the maximum height H of the protrusion 131, for example, 1.8≤W1 / H≤2.2. When W1 / H is less than 1.8 under the condition that H is constant, the maximum width of the protrusion 131 is relatively small, it is difficult to increase the strength and rigidity of the stator core 100, and there is no obvious improvement on the noise problem. When W1 / H is greater than 2.2, the force required for bending the preformed punching sheet 200 increases, the bending difficulty increases, and it is not conducive to the production of the stator punching sheet 150. Therefore, by designing the value of W1 / H to be within the range of 1.8 to 2.2, the strength and rigidity of the stator core 100 can be increased, and at the same time, the force required for bending the preformed punching sheet 200 is ensured to be of an appropriate size, which is conducive to the production and manufacturing of the stator punching sheet 150.

[0070] Referring to Figure 4 In the embodiment of the utility model, along the radial direction of the stator core 100, the maximum protrusion height of the protrusion 131 is H, which satisfies: 3mm≤H≤6mm, for example, the value of H is 3mm, 3.5mm, 4mm, 4.5mm, 5mm or 6mm. It can be understood that the height of the protrusion 131 will affect the size of the force required for bending the preformed punching sheet 200. When H is less than 3mm, the protrusion height of the protrusion 131 is relatively low, it is difficult to increase the strength and rigidity of the stator core 100, and there is no obvious improvement on the noise problem. When H is greater than 6mm, the force required for bending the preformed punching sheet 200 increases, the bending difficulty increases, and it is not conducive to the production of the stator punching sheet 150. Therefore, by designing H within the range of 3mm to 6mm, the strength and rigidity of the stator core 100 can be increased, and at the same time, the force required for bending the preformed punching sheet 200 is ensured to be of an appropriate size, which is conducive to the production and manufacturing of the stator punching sheet 150.

[0071] Referring to Figure 4As shown, in the embodiment of the utility model, along the circumference of stator core 100, the maximum width of protrusion 131 is W, satisfying: 6mm<=W1<=12mm, for example, the value of W1 is 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm. The maximum width of protrusion 131 will also affect the size of the force required for bending prefabricated punching sheet 200, when W1 is less than 6mm, the maximum width of protrusion 131 is small, it is difficult to increase the strength and rigidity of stator core 100, and there is no obvious improvement on the noise problem. When W1 is greater than 12mm, the force required for bending prefabricated punching sheet 200 increases, and the bending difficulty increases, which is not conducive to the production of stator punching sheet 150. Therefore, by designing W1 in the range of 6mm to 12mm, the strength and rigidity of stator core 100 can be increased, and at the same time, the force required for bending prefabricated punching sheet 200 is ensured to be of appropriate size, which is conducive to the production and manufacture of stator punching sheet 150.

[0072] Referring to Figure 3 and Figure 4 As shown, in the embodiment of the utility model, protrusion 131 is symmetrically arranged along the extension line of joint 121. For example, protrusion 131 is in the shape of a semicircular cylinder and is symmetrically arranged relative to the extension line of joint 121, or protrusion 131 is in the shape of a square column, a triangular column, etc., and the appropriate shape is selected according to the actual situation. By arranging protrusion 131 symmetrically along the extension line of joint 121, the strength and rigidity of stator core 100 at joint 121 can be improved, and the structural design of protrusion 131 is reasonable and simple and convenient to produce.

[0073] Referring to Figure 6 and Figure 7 As shown, in the embodiment of the utility model, first reinforcing part 130 can also be configured as welding seam 132. It can be understood that stator punching sheet 150 is clamped and fixed after being bent, and then further fixed by welding. Welding seam 132 is usually formed during welding, and welding seam 132 is located on the outside of yoke part 120 and is arranged in extension along the axial direction of stator core 100, so as to improve the stability and reliability of the connection between stator punching sheets 150. In this embodiment, one stator core 100 has multiple welding seams 132, the multiple welding seams 132 are arranged at intervals along the circumference of stator core 100, and welding seam 132 is located on the outside of yoke part 120 corresponding to joint 121, and the extension line of joint 121 also passes through welding seam 132. It can be understood that the overall rigidity and strength of stator core 100 can be effectively improved by arranging multiple welding seams 132, and the noise during the operation of motor 2000 is reduced. It should be noted that when first reinforcing part 130 is welding seam 132, stator core 100 can also be a segmented stator. It should also be noted that the scheme of arranging welding seam 132 can be applied to the same stator core 100 as the scheme of arranging protrusion 131, for example, welding seam 132 and protrusion 131 are arranged alternately on the peripheral wall of yoke part 120.

[0074] Referring to Figure 6 As shown in the drawings, in the embodiment of the utility model, multiple welds 132 are evenly spaced along the circumference of the stator core 100. For example, there are four welds 132, which are evenly spaced on the circumferential wall of the stator core 100. Of course, there can be three, six, or the like. It should be noted that not every joint 121 needs to correspond to a weld 132, and some joints 121 can correspond to a weld 132. Of course, it is also feasible for every joint 121 to correspond to a weld 132, and the appropriate scheme can be selected according to the actual situation. It can be understood that the more the number of welds 132, the easier it is for the adjacent stator laminations 150 to communicate with each other, resulting in more magnetic flux leakage, and the production cost increases. At the same time, a specific number of welds 132 can cause the natural frequency of the stator core 100 and the frequency during operation of the motor 2000 to be close, resulting in deterioration of noise. Therefore, reasonable design of the number of welds 132 can ensure that the production cost is controlled within an appropriate range, while improving the strength and stiffness of the stator core 100 and reducing noise.

[0075] Referring to Figure 6 and Figure 7 As shown in the drawings, in the embodiment of the utility model, along the circumference of the stator core 100, the maximum width of the weld 132 is W2, which satisfies: 1mm≤W2≤2mm, for example, the value of W2 can be 1mm, 1.1mm, 1.3mm, 1.4mm, 1.6mm, 1.8mm, 2mm. It can be understood that the weld 132 is usually welded by a round bending welding machine, and the welding current is 70A, which is easy to cause the width of the weld 132 to be too large, usually greater than 2mm, resulting in an increase in the magnetic flux leakage of the stator core 100. Therefore, by changing the welding current to 50A, the width of the weld 132 can be reduced to stabilize at a width of 1mm to 2mm, reducing the magnetic flux leakage, and the welding effect is better.

[0076] Referring to Figure 1 , Figure 2 and Figure 3As shown in the drawings, another embodiment of the utility model, the stator core 100 includes a plurality of stator punching sheet 150, a plurality of stator punching sheet 150 along the axial stacking of stator core 100 It is arranged. Stator punching sheet 150 includes yoke sheet 220 and a plurality of tooth sheet 230, yoke sheet 220 is annular, a plurality of tooth sheet 230 is connected to the inside of yoke sheet 220 and is spaced along the circumferential direction of yoke sheet 220, yoke sheet 220 forms the joint 121 extending along the radial direction of stator core 100 between any two adjacent tooth sheet 230. The outside of yoke sheet 220 is provided with a plurality of tabs 240, a plurality of tabs 240 are spaced along the circumferential direction of yoke sheet 220, tab 240 is located on the extension line of joint 121, and the tabs 240 of a plurality of stator punching sheet 150 are stacked along the axial direction of stator core 100 to form the first reinforcing portion 130.

[0077] By setting a plurality of stator punching sheet 150 along the axial stacking of stator core 100, the plurality of tooth sheet 230 of stator punching sheet 150 is connected to the inside of yoke sheet 220, yoke sheet 220 forms joint 121 between any two adjacent tooth sheet 230, and the outside of yoke sheet 220 is provided with a plurality of tabs 240, and the tabs 240 of a plurality of yoke sheet 220 are stacked along the axial direction to form the first reinforcing portion 130. Since the first reinforcing portion 130 is provided with a plurality of and is spaced along the circumferential direction of stator core 100, and the tab 240 is on the extension line of the joint 121, the first reinforcing portion 130 can increase the structural strength of the stator core 100 at the joint 121, improve the rigidity of the stator core 100, thereby reducing the noise caused by the vibration of the stator core 100, and improving the user's experience.

[0078] Referring to Figure 8 , Figure 9 and Figure 10 As shown in the drawings, an embodiment of the utility model, for example, drum motor or plastic package motor. Motor 2000 includes the stator core 100 of the above embodiment. The motor 2000 of the embodiment of the utility model adopts the stator core 100 of the above embodiment, the stator core 100 is sequentially connected along the circumferential direction of the stator core 100 by setting a plurality of punching sheet segments 110 of the magnetic conducting segment 111, and the stator tooth 112 is connected to the inside of the magnetic conducting segment 111, the joint 121 is formed between the two adjacent magnetic conducting segments 111, and the joint 121 is the structure formed at the accommodation groove 210 of the yoke portion 120. All the magnetic conducting segments 111 constitute the yoke portion 120, and the first reinforcing portion 130 is connected to the outside of the yoke portion 120 and is arranged along the axial direction of the stator core 100. Since the first reinforcing portion 130 is provided with a plurality of and is spaced along the circumferential direction of the stator core 100, and the extension line of the joint 121 passes through the first reinforcing portion 130, the first reinforcing portion 130 can increase the structural strength of the stator core 100 at the joint 121, improve the rigidity of the stator core 100, thereby reducing the noise caused by the vibration of the stator core 100, and improving the user's experience.

[0079] Referring to Figure 8 , Figure 9 and Figure 10 , the motor 2000 of the embodiment of the utility model includes stator assembly 2100 and end cover 400, stator assembly 2100 includes stator core 100, plastic-coated part 300, insulating frame 170 and winding 160, insulating frame 170 is sleeved on stator core 100, winding 160 is wound on insulating frame 170. Plastic-coated part 300 is plastic-coated on stator core 100, insulating frame 170 and winding 160, can reduce the production assembly step of stator assembly 2100, improve production efficiency. Meanwhile plastic-coated part 300 and stator core 100, insulating frame 170 and winding 160 constitute an entirety, help to reduce the mechanical vibration of motor 2000, reduce noise.

[0080] Referring to Figure 8 , one end of plastic-coated part 300 has opening part 301, and opening part 301 can be located at the rear end of plastic-coated part 300. It can be understood that usually the one end of the rotating shaft of motor 2000 protrudes, and the other end of the rotating shaft is still located inside motor 2000. Therefore the one end of the rotating shaft of motor 2000 protruding is the front end of motor 2000, and the other end of motor 2000 is the rear end. The outer wall of stop flange 310 is provided with mounting part 350, and mounting part 350 is used for mounting leg 500 of motor 2000. The end face of opening part 301 is provided with stop flange 310, and stop flange 310 is arranged around the central axis of stator core 100. The inner wall of stop flange 310 is configured as a continuous annular surface. The abutting portion 413 of end cover 400 and the annular surface of stop flange 310 are in abutting fit.

[0081] By the above scheme, since the annular surface of stop flange 310 is a continuous annular structure, and the abutting portion 413 of end cover 400 and stop flange 310 are in abutting fit, it plays a dustproof and waterproof role while effectively blocking the noise inside motor 2000 from being transmitted to the outside of motor 2000, further reducing the noise of motor 2000 during operation and improving the user experience. The combination of the annular surface of stop flange 310 and the first reinforcing part 130 provided on stator core 100 can further reduce the noise of motor 2000 during operation.

[0082] Referring to Figure 8As shown, in the embodiment of the utility model, the side wall of the plastic-coated part 300 is provided with a plurality of first mounting seats 330, the plurality of first mounting seats 330 are arranged at intervals along the circumference of the stator assembly 2100, and one end of the first mounting seat 330 towards the stop boss 310 is provided with a first connecting hole 331. For example, the first mounting seat 330 is provided with two and is integrally injection molded with the plastic-coated part 300, which can improve the stability and reliability of the connection between the first mounting seat 330 and the plastic-coated part 300. Of course, the first mounting seat 330 can also be other quantities, for example, three, four, etc., and the appropriate number is selected according to the actual situation. The end cover 400 includes a connecting part 430, and the connecting part 430 is provided with a third connecting hole 431. The motor 2000 further includes a fastener 520, which can be a screw, a bolt, etc. Taking the bolt as an example, the bolt is arranged in the third connecting hole 431 and the first connecting hole 331 and is threadedly connected through a nut and the bolt, so as to fixedly connect the end cover 400 on the plastic-coated part 300.

[0083] Referring to Figure 8 and Figure 9 As shown, in the embodiment of the utility model, the mounting part 350 is provided with a mounting groove 320, the mounting groove 320 extends to the rear end of the stop boss 310 and the first mounting seat 330, and the mounting groove 320 is used for mounting the leg 500 of the motor 2000. It can be understood that when the motor 2000 is installed on a washing machine, an air conditioner or other household appliances, it needs to be connected with the washing machine through the leg 500. By arranging the mounting groove 320, the leg 500 can be conveniently installed. Since the mounting groove 320 extends to the stop boss 310, the leg 500 is closer to the center of the motor 2000, the overall structure of the motor 2000 is more compact, and the occupied volume is small. At the same time, when the connecting part 430 of the end cover 400 is connected with the plastic-coated part 300, the same fastener 520 can be arranged in the first connecting hole 331, the leg 500 and the third connecting hole 431 at the same time, so that the leg 500 can be fixed when the end cover 400 is installed, the number of parts used is reduced, and the compactness of the motor 2000 is improved.

[0084] Referring to Figure 8 and Figure 10 As shown, in the embodiment of the utility model, the first mounting seat 330 is arranged along the axial direction of the stator assembly 2100, and the first connecting hole 331 penetrates both ends of the first mounting seat 330 along the axial direction of the stator assembly 2100. Figure 8The front-rear direction in the motor 2000. It can be understood that when the motor 2000 is installed in the washing machine, because the motor 2000 needs to drive the drum to rotate, a large amount of water is contained in the drum, and therefore the strength and stability of the motor 2000 are required to be higher. Therefore, by arranging the first mounting seat 330 to extend in the axial direction, and the first connecting hole 331 axially penetrating through both ends of the first mounting seat 330, the stability and reliability of the connection between the supporting leg 500 and the plastic-coated part 300 can be effectively improved, the supporting leg 500 is prevented from loosening and falling off, and the safety of the motor 2000 is improved.

[0085] Referring to Figure 8 and Figure 9 In the embodiment of the utility model, the mounting part 350 includes a protruding column 321 arranged on the bottom wall of the mounting groove 320, and the protruding column 321 is used for positioning and cooperating with the supporting leg 500. It can be understood that in order to facilitate the relative position of the supporting leg 500 and the mounting groove 320, the supporting leg 500 is provided with a positioning groove 510, and the protruding column 321 is inserted into the positioning groove 510 to determine the relative position of the supporting leg 500 and the mounting groove 320, so as to facilitate the positioning and installation of the supporting leg 500 and improve the installation efficiency.

[0086] Referring to Figure 8 and Figure 10 In the embodiment of the utility model, the side wall of the plastic-coated part 300 is provided with a second mounting seat 340, the second mounting seat 340 extends along the axial direction of the stator assembly 2100, one end of the second mounting seat 340 is flush with the end surface of the flange boss 310 and connected with the flange boss 310, and the end of the second mounting seat 340 flush with the flange boss 310 is provided with a second connecting hole 341. For example, two first mounting seats 330 and one second mounting seat 340 are arranged along the circumference of the plastic-coated part 300, and the first mounting seat 330 and the second mounting seat 340 are integrally formed on the plastic-coated part 300. Since the supporting leg 500 is usually two, the second mounting seat 340 does not need to install the supporting leg 500, so that one end of the second mounting seat 340 can be flush with the end surface of the flange boss 310 and connected with the flange boss 310, the overall strength and rigidity of the flange boss 310 and the plastic-coated part 300 can be improved, the vibration of the motor 2000 can be effectively reduced, and the noise generated by the motor 2000 can be reduced.

[0087] The motor 2000 of the embodiment of the utility model, including above embodiment's stator assembly 2100. The motor 2000 of the embodiment of the utility model, adopt above embodiment's stator assembly 2100, by setting up and pack in stator core 100, can reduce production assembly step, improve production efficiency. While pack 300 and stator core 100 constitute a whole, help to reduce the mechanical vibration of motor 2000, reduce noise. The end face of pack 300 is equipped with the stop mouth boss 310, the stop mouth boss 310 is set around the central axis of stator core 100, and the end cover 400 is connected to the rear end of pack 300. Since the stop mouth boss 310 is a continuous annular structure, and the abutting portion 413 of the end cover 400 and the stop mouth boss 310 abut and cooperate, while playing the dustproof and waterproof role, it can also effectively block the noise in the motor 2000 from transmitting to the outside of the motor 2000, further reduce the noise of the motor 2000 during operation, improve the user's experience.

[0088] Referring to Figure 11 and Figure 12 As shown in the embodiment of the utility model, the motor 2000 further includes an end cover 400, the end cover 400 includes a body 410 and a second reinforcing portion 420, the body 410 includes a bearing portion 411, an abutting portion 413, a positioning flange 416 and a connecting portion 430, the inner side of the bearing portion 411 is recessed to form a bearing chamber 412, the bearing chamber 412 is used for installing a bearing, and one end of the rotating shaft of the motor 2000 cooperates with the bearing. The abutting portion 413 is connected to the edge of the bearing portion 411 and is arranged around the bearing chamber 412, the abutting portion 413 is used for abutting and cooperating with the inner side wall of the stop mouth boss 310, so as to avoid dust, water and the like from entering the inside of the motor 2000 through the gap between the abutting portion 413 and the stop mouth boss 310, thereby improving the safety and stability of the motor 2000 during operation. The positioning flange 416 is connected to the edge of the abutting portion 413 and is arranged around the abutting portion 413, the positioning flange 416 is used for positioning and cooperating with the end face of the stop mouth boss 310, thereby determining the axial position between the end cover 400 and the motor 2000. The connecting portion 430 is connected to the positioning flange 416, and the connecting portion 430 is used for fixedly connecting with the pack 300, thereby fixing the relative position between the end cover 400 and the pack 300.

[0089] The second reinforcing portion 420 is arranged at least one of the bearing portion 411, the abutting portion 413 and the positioning flange 416. For example, the second reinforcing portion 420 is arranged only at the bearing portion 411; or the second reinforcing portion 420 is arranged only at the abutting portion 413; or the second reinforcing portion 420 is arranged only at the positioning flange 416; or the second reinforcing portion 420 is arranged at the bearing portion 411, the abutting portion 413 and the positioning flange 416. It can be understood that the second reinforcing portion 420 arranged at least one of the bearing portion 411, the abutting portion 413 and the positioning flange 416 can improve the overall strength and rigidity of the end cover 400, and can reduce the noise of the motor 2000 in operation. The combination of the scheme of arranging the second reinforcing portion 420 on the end cover 400 and the scheme of arranging the first reinforcing portion 130 on the stator core 100 can further reduce the noise of the motor 2000 in operation.

[0090] With reference to Figure 12 In the embodiment of the utility model, the second reinforcing portion 420 includes a reinforcing rib 421, and the reinforcing rib 421 is arranged on the outer end surface of the bearing portion 411. The outer end surface of the bearing portion 411 is the end surface of the one end of the bearing portion 411 away from the bearing chamber 412. It can be understood that, since the bearing chamber 412 needs to be formed in the bearing portion 411 to install the bearing, arranging the reinforcing rib 421 on the outer end surface of the bearing portion 411 can avoid the reinforcing rib 421 occupying the space of the bearing chamber 412, so that the overall structure of the end cover 400 is more compact, and the design is more reasonable. At the same time, arranging the reinforcing rib 421 on the outer end surface of the bearing portion 411 also facilitates the stamping forming of the reinforcing rib 421, and improves the production efficiency. It should be noted that, as an alternative embodiment, the reinforcing rib 421 can also be arranged on the inner end surface, the inner side surface or the outer side surface of the bearing portion 411, which can also increase the overall rigidity and strength of the end cover 400 and reduce the noise of the motor 2000 in operation.

[0091] With reference to Figure 12 and Figure 13As shown in the embodiment of the utility model, the outer end surface of the bearing part 411 is outwardly convex to form a reinforcing rib 421, and the reinforcing rib 421 is annular and arranged around the central axis of the bearing chamber 412. For example, through a stamping process, the inner end surface of the bearing part 411 is concave, and the outer end surface is convex to form the reinforcing rib 421. Therefore, the reinforcing rib 421 and the bearing part 411 are integrally formed, which can improve the stability and reliability of the connection between the reinforcing rib 421 and the bearing part 411, and reduce the risk of loosening and falling off of the reinforcing rib 421 and the bearing part 411. It can be understood that arranging the reinforcing rib 421 on the outer end surface of the bearing part 411 can avoid occupying the space of the bearing chamber 412, so that the overall structure of the end cover 400 is more compact and the design is more reasonable. The middle part of the outer end surface of the bearing part 411 is provided with a through hole, the through hole is coaxially arranged and communicated with the bearing chamber 412, and the reinforcing rib 421 is arranged around the edge of the through hole, which is beneficial to the stamping forming of the reinforcing rib 421 and has high production efficiency.

[0092] Referring to Figure 12 As shown in the embodiment of the utility model, the second reinforcing part 420 includes a convex rib 422, the convex rib 422 is arranged on the abutting part 413, and the convex rib 422 is provided with a plurality of convex ribs 422 and is arranged around the bearing chamber 412. For example, the convex rib 422 is arranged on the outer wall of the abutting part 413 to avoid occupying the space inside the motor 2000. As an alternative embodiment, the convex rib 422 can also be arranged on the inner wall of the abutting part 413, and the appropriate arrangement position is selected according to the actual situation. It should be noted that the inner wall of the abutting part 413 refers to the side facing the inside of the motor 2000, and the outer wall of the abutting part 413 refers to the side away from the inside of the motor 2000. The convex rib 422 can be provided with six, and the six convex ribs 422 are uniformly and spacedly arranged along the circumference of the bearing chamber 412. Of course, the convex rib 422 can also be other quantities, for example, one, two, three, four, etc., and the appropriate quantity is selected according to the actual situation. By arranging the convex rib 422 on the abutting part 413, the overall rigidity and strength of the abutting part 413 can be enhanced, and arranging a plurality of convex ribs 422 can further improve the strength of the abutting part 413, effectively avoiding the deformation and bending of the abutting part 413. At the same time, it can also reduce the resonance with the motor 2000 to reduce the noise of the motor 2000 during operation.

[0093] Referring to Figure 12 and Figure 13 As shown in the embodiment of the utility model, the inner wall of the abutting part 413 is concave, and the outer wall of the corresponding position of the abutting part 413 is outwardly convex to form the convex rib 422. Therefore, the convex rib 422 can be formed on the abutting part 413 through a stamping process, which can improve the production efficiency. Since the stamping process is adopted, the design of the convex rib 422 as a plurality of convex ribs 422 is beneficial to the forming of each convex rib 422 and improves the rationality of the structure design of the end cover 400.

[0094] Referring toFigure 12 As shown in FIG. 13, in the embodiment of the utility model, the second reinforcing part 420 includes a reinforcing flange 423, the reinforcing flange 423 is arranged at the edge of the positioning flange 416. For example, the reinforcing flange 423 is arranged around the positioning flange 416, and the reinforcing flange 423 and the positioning flange 416 are integrally formed, which can improve the stability and reliability of the connection between the reinforcing flange 423 and the positioning flange 416. The overall strength and rigidity of the positioning flange 416 can be improved after the reinforcing flange 423 is arranged, which effectively reduces the resonance of the end cover 400 and the motor 2000 and reduces the noise of the motor 2000 during operation.

[0095] Referring to Figure 12 and Figure 13 As shown in FIG. 13, in the embodiment of the utility model, the edge of the positioning flange 416 is outwardly bent to form a reinforcing flange 423, and the outward bending refers to the direction away from the motor 2000, that is, the backward bending. For example, the edge of the positioning flange 416 can be outwardly bent through a press bending process during processing to form the reinforcing flange 423. By using the above scheme, the reinforcing flange 423 has low difficulty in production and manufacturing, high production efficiency, and can effectively improve the overall strength and rigidity of the positioning flange 416 and reduce the noise of the motor 2000 during operation. It should be noted that in another embodiment, the edge of the positioning flange 416 is inwardly bent to form a reinforcing flange 423, which also improves the overall strength and rigidity of the positioning flange 416.

[0096] Referring to Figure 12 As shown in FIG. 13, in the embodiment of the utility model, the end cover 400 further includes a connecting part 430 connected to the positioning flange 416, the connecting part 430 is provided in plurality and is arranged at intervals along the circumference of the positioning flange 416, the connecting part 430 is used for fixedly connecting with the plastic-encapsulated stator, the reinforcing flange 423 is connected to the edge of the positioning flange 416 and is connected to the edge of the connecting part 430, and the reinforcing flange 423 is configured as a continuous annular structure. Therefore, the strength and rigidity of the connecting part 430 and the positioning flange 416 can be simultaneously increased.

[0097] Referring to Figure 12 and Figure 13 As shown in FIG. 13, in the embodiment of the utility model, the inner side of the body 410 is recessed, the outer side is protruded to form a bearing part 411, and the bearing part 411 and the abutting part 413 are integrally formed. It should be noted that the inner side of the body 410 is the side facing the plastic-encapsulated part 300, and the outer side is the side away from the plastic-encapsulated part 300. For example, through a stamping process, one side of the middle part of the body 410 is recessed, and the other side is protruded to form the bearing part 411. The processing efficiency can be improved, and the production cost can be reduced.

[0098] Referring to Figure 13As shown, in the embodiment of the utility model, the abutting part 413 includes a first annular sheet 414 and a second annular sheet 415, the first annular sheet 414 is connected to the edge of the bearing part 411 and extends along the radial direction of the bearing chamber 412, and the second annular sheet 415 is connected to the edge of the first annular sheet 414 and is arranged to extend in the direction away from the inner side of the first annular sheet 414. The first annular sheet 414 is provided with a convex rib 422, and the second annular sheet 415 is used for abutting and matching with the side wall of the stop flange boss 310. By adopting the above scheme, the abutting part 413 has a simple structure and is convenient to manufacture.

[0099] Referring to Figure 12 As shown, in the embodiment of the utility model, the connecting part 430 is provided with a plurality of connecting parts and is arranged at intervals along the circumferential direction of the positioning flange 416. For example, the connecting part 430 is provided with three connecting parts, and the three connecting parts 430 are all connected to the positioning flange 416. Of course, the connecting part 430 can also be of other quantities, for example, one, two, four, five, etc. Among them, referring to Figure 9 and Figure 10 As shown, the connecting part 430 is provided with a first connecting hole 331, and the plastic-coated part 300 includes a mounting seat, and the mounting seat is arranged to extend along the axial direction of the motor 2000. The number of mounting seats is the same as the number of connecting parts 430, and the rear end of the mounting seat is provided with a second connecting hole 341. When the end cover 400 is installed, the first connecting hole 331 and the second connecting hole 341 are aligned, and then a screw or a bolt is arranged in the first connecting hole 331 and the second connecting hole 341, so as to fix the relative position of the end cover 400 and the plastic-coated part 300.

[0100] Referring to Figure 11 and Figure 12 As shown, in the embodiment of the utility model, in order to facilitate the positioning and alignment of the first connecting hole 331 and the second connecting hole 341, a positioning hole 432 is further arranged in one of the connecting parts 430, and a positioning column 311 is arranged on the end face of the stop flange boss 310, and the positioning column 311 is inserted into the positioning hole 432, so as to determine the connection between the corresponding connecting part 430 and the corresponding mounting seat, thereby improving the assembly efficiency of the end cover 400.

[0101] Since the motor 2000 adopts all the technical solutions of the stator core 100 in the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0102] The household appliance of the embodiment of the utility model, including above embodiment's motor 2000, the household appliance can be washing machine, air conditioner, dehumidifier etc. The household appliance of the embodiment of the utility model adopts the motor 2000 of above embodiment, and the stator core 100 of the motor 2000 is sequentially connected along the circumference direction of the stator core 100 by setting multiple punching sheet segments 110 magnetic conducting segments 111, and the stator tooth 112 is connected to the inner side of the magnetic conducting segment 111, and the joint 121 is formed between the adjacent two magnetic conducting segments 111, and the joint 121 is the structure formed at the accommodation groove 210 of the yoke part 120. All magnetic conducting segments 111 constitute the yoke part 120, and the first reinforcing part 130 is connected to the outer side of the yoke part 120 and is arranged along the axial direction of the stator core 100. Since the first reinforcing part 130 is provided with multiple and is arranged along the circumferential direction of the stator core 100, and the extension line of the joint 121 passes through the first reinforcing part 130, therefore the first reinforcing part 130 can increase the structural strength of the stator core 100 at the joint 121, so as to improve the rigidity of the stator core 100, thereby reducing the noise caused by the vibration of the stator core 100, and improving the user's experience.

[0103] Since the household appliance adopts all the technical solutions of the motor 2000 of above embodiment, therefore at least has all the beneficial effects brought by the technical solutions of above embodiment, which will not be repeated here.

[0104] The above embodiment of the utility model is described in detail in combination with the drawings, but the utility model is not limited to the above embodiment, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A stator core characterized by, include: Multiple punch segments, each punch segment including a magnetic conductor segment and stator teeth, the stator teeth being connected to the inner side of the magnetic conductor segment, the multiple punch segments being arranged circumferentially along the stator core, and the magnetic conductor segments of adjacent punch segments being connected sequentially, a joint extending radially along the stator core being formed between two adjacent magnetic conductor segments, and the magnetic conductor segments of the multiple punch segments enclosing each other to form a yoke; A plurality of first reinforcing parts are provided, which are connected to the outer side of the yoke and extend along the axial direction of the stator core. The first reinforcing parts are located on the extension line of the joint, and the plurality of first reinforcing parts are spaced apart circumferentially along the stator core.

2. The stator core of claim 1, characterized by: The first reinforcing part is configured as a protrusion, which is integrally formed on the outer side wall of the yoke.

3. The stator core of claim 2, characterized by: The stator core includes multiple stator laminations stacked axially. The stator laminations are configured to be made of elongated pre-formed laminations. Each pre-formed lamination includes a yoke lamination and multiple toothed laminations. The toothed laminations are connected to the same side of the yoke lamination and spaced apart along the length of the yoke lamination. The side where the yoke lamination and the toothed laminations are connected is provided with multiple relief grooves. The relief grooves are located between adjacent toothed laminations. Each relief groove has two inclined surfaces that are arranged opposite each other along the length of the yoke lamination. The included angle between the two inclined surfaces is α. The maximum thickness of the yoke lamination is L, and the maximum protrusion height of the protrusion is H, satisfying: H = L × tan(α / 2) + S, 0.05 mm ≤ S ≤ 0.5 mm.

4. The stator core of claim 2, characterized by: Along the radial direction of the stator core, the maximum protrusion height of the protrusion is H, which satisfies: 3mm≤H≤6mm.

5. The stator core of claim 2, characterized by: Along the circumference of the stator core, the maximum width of the protrusion is W1, which satisfies: 6mm≤W1≤12mm.

6. The stator core of claim 2, characterized by: The protrusions are symmetrically arranged along the extension line of the joint.

7. The stator core of claim 1, characterized by: Multiple first reinforcing parts are evenly spaced along the circumference of the stator core.

8. The stator core of claim 1, characterized by: The stator core includes a plurality of stator laminations stacked along the axial direction. At least one tab is provided on the outer side of each stator lamination. The tabs of the plurality of stator laminations are stacked along the axial direction to form the first reinforcing portion.

9. The stator core of claim 1, characterized by: The first reinforcing part is configured as a weld.

10. The stator core of claim 9, characterized by: Along the circumference of the stator core, the maximum width of the weld is W2, which satisfies: 1mm≤W2≤2mm.

11. A stator core characterized by include: Multiple stator laminations are stacked together. Each stator lamination includes a yoke lamination and multiple toothed laminations. The yoke lamination is annular. The multiple toothed laminations are connected to the inner side of the yoke lamination and are spaced apart circumferentially along the yoke lamination. A joint extending radially along the stator core is formed between any two adjacent toothed laminations. Multiple protrusions are provided on the outer side of the yoke lamination. The protrusions are spaced apart circumferentially along the yoke lamination and are located on the extension line of the joint.

12. An electric machine characterized by: Includes the stator core as described in any one of claims 1 to 11.

13. Household appliance, characterized in that Includes the motor described in claim 12.

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