Stator assembly, stator, motor and household appliance

Abstract

The utility model discloses a stator assembly, a stator, a motor and a household electrical appliance, and belongs to the technical field of motors, the stator assembly comprises a stator iron core and an insulating frame, the stator iron core comprises a plurality of iron core units, and each iron core unit comprises a tooth part and a yoke part which are connected with each other; the insulating frame comprises a plurality of frame units, each frame unit is used for accommodating a single iron core unit, and the adjacent frame units are connected through a connecting bridge; each frame unit accommodates a single iron core unit, so that the frame units and the iron core units are connected in a one-to-one correspondence manner, after the plurality of iron core units are connected into the strip-shaped stator iron core through the insulating frame, the connecting bridges are arranged on the insulating frame and can be bent and rounded to form the annular stator iron core, and yoke parts between the adjacent iron core units are propped against each other, so that the stator core is formed. And a metal bridge structure is not needed, so that the flux density of the yoke part is relatively uniform, the distribution of a magnetic field in the stator is more uniform, and the problem of electromagnetic noise caused by local flux density saturation is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a stator assembly, a stator, a motor and a household appliance. Background Art

[0002] In the related art, some motors adopt an inner rotor structure, that is, the rotor is located inside the stator, and the stator core is mostly a bar or full-circle structure. Among them, the full-circle stator core is the traditional structure of the motor, and the material utilization rate is low, resulting in an increase in the cost of the motor. Compared with the full-circle structure, the material utilization rate of the stator core with a bar structure is higher, but its stator core needs to be connected into an integral structure through a metal bridge. Affected by the metal bridge structure, the magnetic field distribution is uneven due to the local magnetic flux saturation inside the stator when the motor is working, which easily causes electromagnetic noise. 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 assembly that can effectively reduce the electromagnetic noise of the motor and ensure the operating efficiency of the motor.

[0004] The utility model also provides a stator, a motor and a household appliance comprising the stator assembly.

[0005] According to the stator assembly of the first embodiment of the utility model, the stator assembly includes:

[0006] The stator core comprises a plurality of core units, each of which comprises a tooth portion and a yoke portion connected to each other;

[0007] An insulating frame, comprising a plurality of frame units, each of which is used to accommodate a single core unit, and adjacent frame units are connected via a connecting bridge;

[0008] The connecting bridge is configured to be bendable so that the plurality of frame units are arranged in a ring shape, and the plurality of core units are arranged along the circumference of the insulating frame, and the yokes between adjacent core units are in contact with each other.

[0009] The stator assembly according to the embodiment of the utility model has at least the following beneficial effects:

[0010] The stator core adopts a block structure, and multiple core units form the stator core, which can improve the material utilization rate of the stator core and help save costs; the insulating frame adopts an integral structure, and multiple frame units form the insulating frame. Adjacent frame units are connected by connecting bridges, and each frame unit accommodates a single core unit, so that the frame unit and the core unit are connected one by one. After the multiple core units are connected into a bar-shaped stator core through the insulating frame, since the connecting bridge is provided on the insulating frame and can be bent, the multiple frame units are arranged around to form a ring-shaped insulating frame, and the multiple core units are arranged along the circumference of the insulating frame to form a ring-shaped stator core, and the yokes between adjacent core units are abutted to achieve a magnetic conduction effect, without the need to adopt a metal bridge structure, so that the magnetic flux density of the yoke is relatively uniform, and the magnetic field distribution inside the stator is more uniform, which is suitable for inner rotor motors, ensures the operating efficiency of the motor, and effectively solves the electromagnetic noise problem caused by local magnetic flux saturation.

[0011] According to some embodiments of the utility model, the yoke portion is arranged at one end of the tooth portion away from the center of the stator core, and each of the frame units includes a winding portion and an outer frame portion connected to each other, the winding portion is sleeved on the tooth portion, and the outer frame portion is sleeved on the yoke portion, and the yoke portion is at least partially exposed from the outer frame portion on both sides along the circumference of the stator core, so that adjacent yoke portions abut against each other.

[0012] According to some embodiments of the utility model, the connecting bridge is connected to the adjacent outer frame portion, and along the radial direction of the stator core, the connecting bridge is located on the side of the outer frame portion away from the tooth portion, or the connecting bridge is located on the side of the outer frame portion close to the tooth portion.

[0013] According to some embodiments of the present invention, the thickness of the connecting bridge ranges from 0.2 mm to 1.0 mm.

[0014] According to some embodiments of the utility model, one side of the yoke along the circumference of the stator core is a first side surface, and the other side is a second side surface, one of the first side surface and the second side surface is provided with a convex portion, and the other is provided with a concave portion, and the convex portion and the concave portion are constructed to be able to be positioned and matched when adjacent yokes abut against each other.

[0015] According to some embodiments of the present invention, the maximum width of the yoke along the circumference of the stator core is L1, the number of the core units is X, the length of the insulating frame is L, the side of the yoke away from the tooth portion is an arc surface, the radius of the arc surface is R, and it satisfies: X*L1<L<3*R*sin(180° / X).

[0016] According to some embodiments of the utility model, the frame units at both ends of the insulating frame are respectively provided with notches, the notches are formed at one end of the outer frame portion away from the connecting bridge, and the two notches are constructed to cooperate to form a positioning groove when the insulating frames are connected end to end to form a ring.

[0017] According to some embodiments of the utility model, each of the core units also includes a boot, which is connected to one end of the tooth portion away from the yoke portion, and each of the frame units also includes an inner frame portion connected to the boot, which covers at least one side of the boot along the circumference of the stator core, so that adjacent boots are spaced apart.

[0018] According to some embodiments of the utility model, the plurality of core units include two first core units and a plurality of second core units, the two first core units are respectively arranged at the frame units at both ends of the insulating frame, the plurality of second core units are arranged between the two first core units, the yokes of the two first core units are respectively provided with bosses, the bosses are formed at the ends of the yokes, and the two bosses are configured to cooperate to form a welding platform when the plurality of core units are arranged in a ring.

[0019] According to some embodiments of the present invention, the frame unit and the connecting bridge are an integrally formed structure.

[0020] The stator according to the second aspect of the present invention comprises a winding and the stator assembly described in the first aspect, wherein the winding is wound around the insulating frame.

[0021] The stator according to the embodiment of the utility model has at least the following beneficial effects:

[0022] The stator applies the stator assembly of the above-mentioned embodiment, the winding is wound on the insulating frame, the stator core adopts a block structure, and the insulating frame adopts an integral structure. Since the connecting bridge is arranged on the insulating frame and can be bent, multiple frame units are arranged around to form a ring-shaped insulating frame, and multiple core units are arranged along the circumference of the insulating frame to form a ring-shaped stator core, and the yokes between adjacent core units are abutted to achieve the effect of magnetic conduction. There is no need to adopt a metal bridge structure, so that the magnetic flux density of the yoke is relatively uniform, and the magnetic field distribution inside the stator is more uniform. It is suitable for inner rotor motors, ensuring the operating efficiency of the motor and effectively solving the electromagnetic noise problem caused by local magnetic flux saturation.

[0023] The motor according to the third aspect of the present invention includes:

[0024] The stator described in the second aspect above, wherein the stator core forms a rotor hole;

[0025] The rotor is rotatably disposed in the rotor hole.

[0026] The motor according to the embodiment of the utility model has at least the following beneficial effects:

[0027] The motor uses the stator of the above embodiment to ensure the operating efficiency of the motor and effectively solve the electromagnetic noise problem caused by local magnetic flux saturation.

[0028] A household appliance according to an embodiment of the fourth aspect of the utility model comprises the motor described in the third aspect above.

[0029] Since the household appliance includes the motor of the above embodiment, it has at least the above beneficial effects, which will not be described in detail here.

[0030] 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

[0031] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the stator assembly in some embodiments of the utility model in a bent and rounded state;

[0033] Figure 2 It is a schematic diagram of a top view of the stator assembly in some embodiments of the utility model in a bent and rounded state;

[0034] Figure 3 It is a schematic cross-sectional structure diagram of a stator assembly in a bent circular state in some embodiments of the utility model;

[0035] Figure 4 It is a front structural schematic diagram of a stator assembly in a bar-shaped state in some embodiments of the utility model;

[0036] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0037] Figure 6 It is a front structural schematic diagram of the stator assembly in a bar-shaped state of other embodiments of the utility model;

[0038] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at B in the middle;

[0039] Figure 8 for Figure 4 The cross-sectional structure diagram of the stator assembly of the illustrated embodiment is in a bar-shaped state;

[0040] Fig. 9It is a front structural schematic diagram of the core unit of some embodiments of the utility model;

[0041] Fig.10 For application Fig. 9 The cross-sectional structure diagram of the stator assembly of the core unit shown is in a bar-shaped state;

[0042] Fig.11 for Fig.10 A schematic cross-sectional view of the stator assembly of the embodiment shown in a curved circular state;

[0043] Fig.12 It is a front structural schematic diagram of the core unit of other embodiments of the utility model;

[0044] Fig.13 For application Fig.12 The front structural schematic diagram of the stator assembly of the core unit is shown in a bar-shaped state;

[0045] Fig.14 for Fig.13 The stator assembly shown is a schematic cross-sectional structure diagram of a stator assembly in a bent circular state.

[0046] Reference numerals:

[0047] Stator assembly 10;

[0048] stator core 100; rotor hole 101; core unit 110; yoke 111; first side surface 1111; second side surface 1112; convex portion 1113; concave portion 1114; boss 1115; welding platform 1116; tooth portion 112; shoe portion 113; tooth slot 120;

[0049] Insulating frame 200 ; frame unit 210 ; winding portion 211 ; winding groove 2111 ; outer frame portion 212 ; inner frame portion 213 ; connecting bridge 220 ; giving way groove 230 ; positioning groove 240 ; notch 241 . DETAILED DESCRIPTION

[0050] 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.

[0051] In the description of the present invention, it should be understood that the descriptions involving orientation, such as up, down, left, right, axial, radial, etc., indicating orientation or positional relationships, are based on the orientation 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.

[0052] 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.

[0053] 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.

[0054] At present, the motor can adopt the structure of outer rotor or inner rotor, also known as outer rotor motor or inner rotor motor. Since the bar stator core has the advantages of high material utilization and low cost compared with the whole round stator core, some outer rotor motors or inner rotor motors will adopt a bar stator core. After the bar stator core is formed, it is bent into a circle to obtain a ring core. In the related technology, the bar stator core is usually composed of multiple layers of silicon steel sheets stacked together, and two adjacent core blocks are connected by a metal bridge. The metal bridge is stamped out integrally during the stamping of the silicon steel sheet, so that multiple core blocks can be connected in sequence to form a bar stator core. However, local magnetic density saturation will be formed at the position of the metal bridge, resulting in uneven distribution of the magnetic field inside the stator, thereby generating electromagnetic noise.

[0055] To this end, a stator assembly proposed in an embodiment of the utility model is suitable for an inner rotor motor, which can solve the electromagnetic noise problem of the motor and improve the material utilization rate of the stator core, thereby saving costs. The stator assembly is described below with a specific example.

[0056] Reference Figure 1 and Figure 2As shown, the stator assembly 10 of the embodiment of the utility model includes a stator core 100 and an insulating frame 200. The stator core 100 includes a plurality of core units 110. The core units 110 are formed by laminating silicon steel sheets. Each core unit 110 is a separate core block. The plurality of core units 110 are arranged to form the stator core 100, that is, the stator core 100 adopts a block structure. The insulating frame 200 includes a plurality of frame units 210. The frame units 210 match the core units 110. Each frame unit 210 can accommodate a single core unit 110. The number of the frame units 210 and the number of the core units 110 are consistent, so that the frame units 210 and the core units 110 are connected one by one. Adjacent frame units 210 are connected by connecting bridges 220, so that the plurality of frame units 210 are connected to form an integral insulating frame 200, and the plurality of core units 110 are connected to form the stator core 100 through the insulating frame 200.

[0057] Reference Figure 3 As shown, Figure 3 The schematic diagram of the cross-sectional structure of the stator assembly 10 along the radial direction of the stator core 100 is shown. It can be understood that each core unit 110 includes a tooth portion 112 and a yoke portion 111, and the yoke portion 111 is connected to one end of the tooth portion 112 away from the center of the stator core 100. The multiple core units 110 are arranged in a ring shape along the circumference of the insulating frame 200, and the multiple tooth portions 112 are arranged along the circumference of the stator core 100, and define the rotor hole 101. A tooth slot 120 is formed between two adjacent tooth portions 112, and the insulating frame 200 is sleeved on the tooth portion 112. The stator winding is arranged along the circumference of the stator core 100, and the winding wire of the winding can pass through the tooth slot 120 and be wound on the tooth portion 112. The winding is separated from the stator core 100 by the insulating frame 200 to ensure the insulation performance of the stator as a whole.

[0058] Reference Figure 4 and Figure 5 As shown, the cross-sectional shape of each core unit 110 and each frame unit 210 is roughly T-shaped, so that each frame unit 210 can accommodate a single core unit 110. It can be understood that in the embodiment, the connecting bridge 220 is used to connect the frame unit 210, and specifically, the connecting bridge 220 and the frame unit 210 can be made into an integrated structure by injection molding. The insulating frame 200 is made of insulating material, specifically nylon, polybutylene terephthalate (PBT), polyethylene terephthalate (PET) and other materials. The connecting bridge 220 has a certain flexibility, and the connecting bridge 220 is configured to be integrally formed with the adjacent frame unit 210 and can be bent, that is, the adjacent frame unit 210 can be bent around the connecting bridge 220, so that multiple frame units 210 are arranged in a ring shape.

[0059] Since the stator core 100 is a block structure, each core unit 110 is assembled into the frame unit 210 one by one after being formed, so as to form a bar-shaped stator core 100, and then the insulating frame 200 is bent into a circle to obtain a ring-shaped core. Figure 4 The bar-shaped stator assembly 10 shown is bent to form Figure 2 In the annular stator assembly 10 shown, a plurality of core units 110 are arranged in an annular shape along the circumference of the insulation frame 200 .

[0060] Reference Figure 3 and Figure 4 As shown, it can be understood that the cross section of each core unit 110 is roughly T-shaped, and the tooth portion 112 is connected to the middle position of the yoke portion 111. Figure 4 As shown, when the insulating frame 200 is not bent, there is a certain gap between adjacent core units 110. When the stator core 100 is bent, the yokes 111 between adjacent core units 110 abut against each other. A plurality of yokes 111 are arranged along the circumference of the insulating frame 200 to form the outer contour of the stator core 100. A plurality of teeth 112 are arranged along the circumference of the insulating frame 200 to define the rotor hole 101.

[0061] Since the adjacent core units 110 have the effect of magnetic conduction when in contact with each other, there is no need to rely on the metal bridge structure for connection, so that the magnetic flux density of multiple yokes 111 is relatively uniform, and the magnetic field distribution inside the stator is more uniform, ensuring the operating efficiency of the motor. It can be understood that in the related art, the stator core 100 needs to be bent into a ring shape by strips, and the thickness of the metal bridge is less than the thickness of the yoke 111, which produces a magnetic isolation effect. Therefore, it is easy to cause magnetic field concentration at the metal bridge position, resulting in local magnetic flux saturation, which leads to uneven magnetic field distribution, and then generates electromagnetic noise, resulting in a significant increase in the operating noise of the motor. Compared with the structure of the related art, there is no metal bridge between the adjacent core units 110 in the embodiment of the utility model, but abutment is used for magnetic conduction, which is not easy to cause local magnetic flux saturation, making the magnetic field distribution more uniform, which is conducive to reducing electromagnetic noise, effectively solving the electromagnetic noise problem caused by local magnetic flux saturation, and reducing the operating noise of the motor.

[0062] Reference Figure 3 As shown, in some embodiments, since each core unit 110 is a separate block structure and all core units 110 have the same shape, the same mold can be used to make silicon steel sheets, which is convenient for the production of molds and subsequent production use, and is beneficial to improving the material utilization rate of the stator core 100 and reducing costs. There is no need to distinguish and identify the core units 110, and production efficiency is improved.

[0063] It should be noted that, in some embodiments, the insulating frame 200 may adopt a split structure, for example, the insulating frame 200 is divided into an upper and lower frame, the upper and lower frames respectively have frame units 210 corresponding to the core units 110, and the upper and lower frames are inserted into the stator core 100 in a plug-in manner to achieve the assembly of the insulating frame 200 and the stator core 100. In other embodiments, the insulating frame 200 and the stator core 100 can also be assembled by injection molding. For example, the insulating frame 200 is formed on the outside of the stator core 100 by a plastic coating process, and a connecting bridge 220 is formed integrally at the same time, so that multiple core units 110 can be wrapped by the insulating frame 200 to ensure the insulation effect and insulation level of the motor.

[0064] Reference Figure 4 and Figure 5 As shown, each frame unit 210 includes a winding portion 211 and an outer frame portion 212, and the winding portion 211 and the outer frame portion 212 are connected in a T shape, wherein the winding portion 211 is sleeved on the tooth portion 112, and the winding portion 211 can completely wrap the tooth portion 112 to form a winding groove 2111, thereby ensuring the insulation between the winding of the winding and the tooth portion 112. The outer frame portion 212 is sleeved on the yoke portion 111, and the two sides of the yoke portion 111 along the circumference of the stator core 100 are respectively a first side surface 1111 and a second side surface 1112. The first side surface 1111 and the second side surface 1112 are at least partially exposed from the outer frame portion 212. The first side surface 1111 and the second side surface 1112 can be completely exposed or partially exposed. That is to say, the outer frame portion 212 does not cover the first side surface 1111 and the second side surface 1112, or the outer frame portion 212 covers part of the first side surface 1111 and part of the second side surface 1112, to ensure that adjacent yoke portions 111 can abut against each other.

[0065] by Figure 3 The example shown is used for illustration. In the embodiment, the outer frame 212 completely covers the side of the yoke 111 facing the tooth 112, and partially covers the side of the yoke 111 away from the tooth 112. The first side 1111 and the second side 1112 of the yoke 111 are exposed. When the stator core 100 exists in a strip structure, the first side 1111 and the second side 1112 of the adjacent yoke 111 are in a separated state; when the stator core 100 is bent into a ring shape, the first side 1111 of any yoke 111 abuts against the second side 1112 of the adjacent yoke 111, which plays a magnetic conduction effect and ensures the efficiency of the motor. It can be understood that the first side 1111 and the second side 1112 can be completely fitted or partially fitted to achieve the abutment of adjacent yokes 111. In some embodiments, since the stator is suitable for an inner rotor motor, the outer frame 212 can also completely cover the side of the yoke 111 away from the tooth 112 without affecting the operation of the rotor.

[0066] Reference Figure 2 and Figure 3 As shown, each core unit 110 further includes a boot 113, which is connected to one end of the tooth portion 112 away from the yoke 111, that is, the yoke 111 and the boot 113 are respectively located at the two ends of the tooth portion 112. Each frame unit 210 further includes an inner frame 213, the inner frame 213 and the outer frame 212 are respectively located at the two ends of the winding portion 211, the inner frame 213 is sleeved on the boot 113, and a winding slot 2111 is formed between the outer frame 212 and the inner frame 213. The inner frame 213 is used to limit the winding in the radial direction of the stator core 100 to prevent the winding from shifting or detaching from the winding portion 211.

[0067] Since the stator core 100 is suitable for the inner rotor core, after the stator core 100 is rounded, the boots 113 of two adjacent core units 110 need to remain in a non-contact state to form a magnetic isolation structure, that is, between adjacent core units 110, adjacent yokes 111 are in contact, and adjacent boots 113 need to be separated to ensure that the yoke 111 has a magnetic conductivity effect and each tooth 112 can form a separate magnetic pole. If adjacent boots 113 are in contact, a magnetic conductivity effect will be generated, resulting in uneven distribution of the magnetic field generated by the stator, which will reduce the performance of the motor.

[0068] Therefore, in some embodiments, the inner frame portion 213 covers both sides of the boot portion 113 along the circumference of the stator core 100, that is, any two adjacent boot portions 113 can be separated by the inner frame portion 213, ensuring that the boot portions 113 of two adjacent core units 110 remain in a non-contact state.

[0069] It can be understood that since the boot portion 113 is wrapped by the inner frame portion 213 on both sides along the circumference of the stator core 100, when the stator core 100 is bent, the inner adjacent inner frame portion 213 can position the stator core 100 along the circumferential direction, and cooperate with the abutment structure of the outer yoke portion 111 to form a linear positioning effect in the radial direction of the stator core 100, ensuring the uniformity of the distribution of the stator core 100 in the circumferential direction, making the magnetic field uniform, the motor shape and position tolerances excellent, and the noise improved.

[0070] It should be noted that the inner frame portion 213 is not limited to covering both sides of the boot portion 113. In other embodiments, the inner frame portion 213 may also cover one side of the boot portion 113 so that adjacent boot portions 113 are spaced apart to ensure that the boot portions 113 of two adjacent core units 110 remain in a non-contact state.

[0071] Reference Figure 2 and Figure 4As shown, the frame units 210 at both ends of the insulating frame 200 are respectively provided with notches 241, and the notches 241 are formed at one end of the outer frame portion 212 away from the connecting bridge 220, that is, the notches 241 are respectively provided at the head and tail ends of the insulating frame 200. When the stator core 100 is bent into a circle, the head and tail ends of the insulating frame 200 are connected, and the two notches 241 cooperate to form a positioning groove 240. The opening of the positioning groove 240 faces outward along the radial direction of the stator core 100. At this time, the yokes 111 of the core units 110 at the head and tail ends of the stator core 100 abut against each other, and the abutting position is located at the bottom of the positioning groove 240. The positioning groove 240 is used for the positioning function of the post-production process, which is convenient for welding and fixing the core units 110 at the head and tail ends of the stator core 100.

[0072] Reference Figure 4 As shown, in some embodiments, all the connecting bridges 220 are respectively connected to adjacent outer frame portions 212, and the connecting bridges 220 are located on a side of the outer frame portion 212 away from the tooth portion 112. Figure 5 As shown, two frame units 210 are used as examples for explanation. When the insulating frame 200 is in a strip state, adjacent outer frame parts 212 are separated to form a clearance groove 230. The clearance groove 230 is located on the side of the connecting bridge 220 facing the tooth slot 120. When the two frame units 210 are bent around the connecting bridge 220, the clearance groove 230 can provide space for the two frame units 210, which facilitates the bending of the connecting bridge 220. During the bending process of the stator core 100, the clearance groove 230 gradually narrows until the adjacent yokes 111 abut against each other, so as to avoid the connecting bridge 220 interfering with the two adjacent yokes 111 and preventing them from contacting.

[0073] It should be noted that the side of the outer frame portion 212 away from the tooth portion 112 is the outer side, and the side of the outer frame portion 212 facing the winding groove 2111 is the inner side. Setting the connecting bridge 220 on the outer side of the outer frame portion 212 can avoid the connecting bridge 220 interfering with the winding groove 2111. The winding groove 2111 has a larger area and more windings, which is beneficial to improving the efficiency of the motor.

[0074] Reference Figure 6 and Figure 7 As shown, in other embodiments, all the connecting bridges 220 are respectively connected to the adjacent outer frame parts 212, and the connecting bridges 220 are located on the side of the outer frame part 212 close to the tooth part 112. Adjacent outer frame parts 212 are separated to form a clearance groove 230, and the clearance groove 230 is located on the side of the connecting bridge 220 facing away from the tooth slot 120. During the bending process of the stator core 100, the adjacent stator cores 100 will approach each other, and the clearance groove 230 will gradually narrow until the adjacent yoke parts 111 are abutted, and the connecting bridge 220 does not affect the contact of the adjacent yoke parts 111.

[0075] It should be noted that by arranging the connection bridge 220 on the inner side of the outer frame 212 , the width of the yoke 111 along the circumferential direction of the stator core 100 can be designed to be larger, and the product effect is better.

[0076] Reference Figure 5 and Figure 7 As shown, it can be understood that the thickness of the connecting bridge 220 is less than the thickness of the outer frame 212, so that the connecting bridge 220 can be bent and deformed to meet the requirement of bending. If the thickness of the connecting bridge 220 is too small, the strength of the connecting bridge 220 will be reduced, and the connecting bridge 220 will be easily broken. If the thickness of the connecting bridge 220 is too large, the connecting bridge 220 is not easy to bend, and it will interfere with the adjacent yoke 111, affecting the abutment effect.

[0077] In some embodiments, the thickness range of the connecting bridge 220 is set to 0.2mm to 1.0mm, that is, the minimum thickness of the connecting bridge 220 is not less than 0.2mm, and the maximum thickness is not greater than 1.0mm, ensuring the stability of the connection structure of adjacent frame units 210 and avoiding the thickness of the connecting bridge 220 being too small or too large.

[0078] It should be noted that the thickness of the connecting bridge 220 can be evenly distributed along its length, or it can be unevenly distributed. For example, the thickness of the two ends of the connecting bridge 220 is thicker than that of the middle part to ensure the reliability of the connection between the connecting bridge 220 and the outer frame 212, while facilitating the bending of the middle part. The thickness of the two ends of the connecting bridge 220 can be 0.8mm, 1.0mm, etc., and the thickness in the middle can be 0.2mm, 0.4mm, etc.

[0079] Reference Figure 8 As shown, it can be understood that the number of teeth 112 of the stator core 100 is selected according to factors such as the specific type of the motor, design parameters and application requirements, and the number of frame units 210 is set according to the number of core units 110. In order to ensure that the stator core 100 can be ring-shaped after being bent from a bar, it is necessary to satisfy that the overall length of the insulating frame 200 is greater than the circumference of the stator core 100, that is, it satisfies: X*L1<L, wherein L is the overall length of the insulating frame 200, L1 is the maximum width of the yoke 111 along the circumference of the stator core 100, and X is the number of core units 110. Since adjacent yokes 111 abut against each other after the stator core 100 is bent, the circumference of the stator core 100 is equal to the product of the maximum width of the yoke 111 and the number of core units 110.

[0080] Since the overall length of the insulating frame 200 is related to the number of core units 110, and when the overall length of the insulating frame 200 is greater than the circumference of the stator core 100, it is further required that the adjacent yokes 111 can abut against each other to ensure the magnetic conductivity of the stator core 100 and avoid the insulating frame 200 being too long and affecting the curved structure. In some embodiments, the outer side surface of the yoke 111 is an arc surface, and the radius of the arc surface is R, such as Figure 8 O is the center of the circle corresponding to the arc surface, satisfying: L<3*R*sin(180° / X). Therefore, when X*L1<L<3*R*sin(180° / X)is satisfied, the length of the insulating frame 200 can meet the bending requirement, preventing the connecting bridge 220 or the stator core 100 from excessive deformation and reducing the structural stability. At the same time, it also ensures the magnetic conductivity of the stator core 100, making the magnetic density of the yoke 111 relatively uniform, and the magnetic field distribution inside the stator more uniform, reducing the occurrence of local magnetic density saturation and electromagnetic noise.

[0081] Reference Fig.10 and Fig.11 As shown, in some embodiments, the first side surface 1111 of the core unit 110 is provided with a convex portion 1113, and the second side surface 1112 is provided with a concave portion 1114, and the convex portion 1113 matches the concave portion 1114. Fig.10 As shown, when the stator core 100 exists in a strip structure, the convex portion 1113 of the adjacent first side surface 1111 and the concave portion 1114 of the second side surface 1112 are in a separated state; Fig.11 As shown, when the stator core 100 is rounded, the adjacent first side surface 1111 and the second side surface 1112 are abutted against each other, and the protrusion 1113 of any core unit 110 is correspondingly inserted into the recess 1114 of the adjacent core unit 110, so as to realize the radial positioning of the stator core 100, ensure the uniformity of the distribution of the core units 110 in the circumferential direction, make the magnetic field uniformly distributed, improve the noise, enhance the roundness strength of the stator core 100, and improve the overall stability of the stator.

[0082] Understandably, Fig. 9 In the illustrated embodiment, the convex portion 1113 is a protrusion formed on the first side surface 1111, and the concave portion 1114 is a groove formed on the second side surface 1112. The convex portion and the groove are integrally formed during stamping of the silicon steel sheet to simplify the manufacturing process. The convex portion and the groove can meet the positioning and matching requirements, and the specific shape is not limited. In other embodiments, the convex portion 1113 can be formed on the second side surface 1112, and the concave portion 1114 can be formed on the first side surface 1111.

[0083] Reference Fig.12 , Fig.13 and Fig.14As shown, the core unit 110 is divided into two types, including a first core unit 110 and a second core unit 110. The first core unit 110 has two, and the second core unit 110 has multiple. The two first core units 110 are respectively arranged at the frame units 210 at the head and tail ends of the insulating frame 200, and the multiple second core units 110 are arranged between the two first core units 110, and are arranged one-to-one with the multiple frame units 210. Among them, the yokes 111 of the two first core units 110 are respectively provided with bosses 1115, and the bosses 1115 are formed at the ends of the yokes 111. It should be noted that the bosses 1115 are opposite to the notches 241 of the insulating frame 200, so that the bosses 1115 can be exposed outside the insulating frame 200. Fig.13 As shown, when the stator core 100 is in a bar structure, the two bosses 1115 are respectively located at the yoke 111 at the head and tail ends of the stator core 100. Fig.14 As shown, after the stator core 100 is bent into a circle, the yokes 111 at the head and tail ends are abutted against each other, and the two bosses 1115 can cooperate to form a welding platform 1116. The welding platform 1116 is located on the outer periphery of the stator core 100, which is convenient for welding and fixing the welding platform 1116 to achieve the fixation of the stator core 100 at the head and tail.

[0084] An embodiment of the utility model further provides a stator, including a winding and the stator assembly 10 of the above embodiment, wherein the winding includes a plurality of coils, and the plurality of coils are arranged along the circumference of the stator core 100, each coil is wound on a corresponding tooth portion 112, and the winding is separated from the stator core 100 by an insulating frame 200 to ensure the insulation performance of the stator.

[0085] The stator core 100 adopts a block structure, and a plurality of core units 110 form the stator core 100, which can improve the material utilization rate of the stator core 100 and is conducive to cost saving. Since the connecting bridge 220 is provided on the insulating frame 200 and can be bent, the plurality of frame units 210 are arranged around to form a ring-shaped insulating frame 200, and the plurality of core units 110 are arranged along the circumference of the insulating frame 200, and are bent to form a ring-shaped stator core 100, and the yokes 111 between adjacent core units 110 are in contact with each other, which plays a magnetic conduction effect, and there is no need to adopt a metal bridge structure, so that the magnetic flux density of the yoke 111 is relatively uniform, and the magnetic field distribution inside the stator is more uniform, which ensures the operating efficiency of the motor and reduces the occurrence of local magnetic flux density saturation, thereby effectively reducing electromagnetic noise.

[0086] The utility model also provides a motor, which is specifically an inner rotor motor, suitable for household appliances such as air conditioners. The motor includes a stator and a rotor, wherein the stator adopts the stator structure of the above embodiment, and the rotor is rotatably arranged in a rotor hole 101 of a stator core 100.

[0087] It can be understood that the motor uses the stator of the above-mentioned embodiment, and the stator core 100 adopts a block structure. A plurality of core units 110 form the stator core 100, which can improve the material utilization rate of the stator core 100 and is beneficial to cost saving; since the connecting bridge 220 is provided on the insulating frame 200 and can be bent, a plurality of frame units 210 are arranged around to form a ring-shaped insulating frame 200, and a plurality of core units 110 are arranged along the circumference of the insulating frame 200 to form a ring-shaped stator core 100, and the yokes 111 between adjacent core units 110 are abutted against each other, which has the effect of magnetic conduction, and there is no need to adopt a metal bridge structure, so that the magnetic flux density of the yoke 111 is relatively uniform, and the magnetic field distribution inside the stator is more uniform, thereby ensuring the operating efficiency of the motor and reducing the occurrence of local magnetic flux saturation, thereby effectively reducing electromagnetic noise.

[0088] The embodiment of the utility model further provides a household appliance, which may be an air conditioner or other electrical equipment. For example, the air conditioner includes the motor shown in the above embodiment, and the motor can be used to drive the fan wheel and other components of the air conditioner.

[0089] Since the household appliance includes the motor of the above embodiment, it at least has the beneficial effects of the above motor, which will not be described in detail here.

[0090] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A stator assembly, characterized in that: include: The stator core comprises a plurality of core units, each of which comprises a tooth portion and a yoke portion connected to each other; An insulating frame, comprising a plurality of frame units, each of which is used to accommodate a single core unit, and adjacent frame units are connected via a connecting bridge; The connecting bridge is configured to be bendable so that the plurality of frame units are arranged in a ring shape, and the plurality of core units are arranged along the circumference of the insulating frame, and the yokes between adjacent core units are in contact with each other.

2. The stator assembly according to claim 1, characterized in that The yoke is arranged at one end of the tooth portion away from the center of the stator core, and each of the frame units includes a winding portion and an outer frame portion connected to each other. The winding portion is sleeved on the tooth portion, and the outer frame portion is sleeved on the yoke portion. The yoke portion is at least partially exposed from the outer frame portion on both sides along the circumference of the stator core, so that adjacent yoke portions abut against each other.

3. The stator assembly according to claim 2, characterized in that: The connecting bridge is connected to the adjacent outer frame part, and along the radial direction of the stator core, the connecting bridge is located on a side of the outer frame part away from the tooth part, or the connecting bridge is located on a side of the outer frame part close to the tooth part.

4. The stator assembly according to any one of claims 1 to 3, characterized in that: The thickness of the connecting bridge ranges from 0.2 mm to 1.0 mm.

5. The stator assembly according to claim 1 or 2, characterized in that: One side of the yoke along the circumference of the stator core is a first side surface, and the other side is a second side surface. One of the first side surface and the second side surface is provided with a convex portion, and the other is provided with a concave portion, and the convex portion and the concave portion are constructed to be able to be positioned and matched when adjacent yoke portions abut against each other.

6. The stator assembly according to claim 1 or 2, characterized in that: The maximum width of the yoke along the circumference of the stator core is L1, the number of the core units is X, the length of the insulating frame is L, the side of the yoke away from the tooth portion is an arc surface, the radius of the arc surface is R, and it satisfies: X*L1<L<3*R*sin(180° / X).

7. The stator assembly according to claim 2, characterized in that: The frame units at both ends of the insulating frame are respectively provided with notches, the notches are formed at one end of the outer frame away from the connecting bridge, and the two notches are configured to cooperate to form a positioning groove when the insulating frames are connected end to end to form a ring.

8. The stator assembly according to claim 2, characterized in that: Each of the core units also includes a boot portion, which is connected to one end of the tooth portion away from the yoke portion. Each of the frame units also includes an inner frame portion connected to the boot portion, which covers at least one side of the boot portion along the circumference of the stator core, so that adjacent boot portions are spaced apart.

9. The stator assembly according to claim 1, characterized in that: The multiple core units include two first core units and multiple second core units, the two first core units are respectively arranged in the frame units at both ends of the insulating frame, the multiple second core units are arranged between the two first core units, the yokes of the two first core units are respectively provided with bosses, the bosses are formed at the ends of the yokes, and the two bosses are constructed to cooperate to form a welding platform when the multiple core units are arranged in a ring.

10. The stator assembly according to claim 1, characterized in that The frame unit and the connecting bridge are an integrally formed structure.

11. A stator, characterized in that: It comprises a winding and the stator assembly according to any one of claims 1 to 10, wherein the winding is wound around the insulating frame.

12. A motor, characterized in that: include: The stator according to claim 11, wherein the stator core forms a rotor hole; The rotor is rotatably disposed in the rotor hole.

13. A household appliance, characterized in that: Including the motor as claimed in claim 12.

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