Stator assembly, motor and household appliance

Abstract

The utility model discloses a stator assembly, a motor and a household electrical appliance, the stator assembly is an integrated piece, and the stator assembly comprises a stator body; the bearing seat is arranged in the middle of the stator body and comprises a seat body, an axial limiting part and a radial limiting part, the axial limiting part is arranged on the periphery of the seat body and extends in the circumferential direction of the seat body, and the radial limiting part is arranged on the periphery of the seat body and extends in the axial direction of the seat body; and the axial limiting part and the radial limiting part are respectively matched with the stator body to limit the displacement of the stator body. According to the stator assembly provided by the embodiment of the utility model, the axial limiting part and the radial limiting part are arranged on the seat body, so that the axial binding force between the stator body and the bearing seat can be increased, and the tangential binding force between the stator body and the bearing seat can be increased, and therefore, the limiting effect on the stator body can be improved; mutual movement of the stator body and the bearing seat is prevented, and reliability of motor operation can be improved.

Description

Technical Field

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

[0002] The bearing is one of the important components for a motor to output mechanical energy. The bearing housing is an important component for bearing assembly. A motor requires components such as bearings, bearing housings and shafts to achieve the effective assembly of the stator and the rotor, so as to realize the energy conversion of the electromechanical system. In the related art, the axial dimension of the bearing housing of the existing motor is small, resulting in a small bonding force between the stator and the bearing housing, which easily causes the stator and the bearing housing to move relative to each other, affecting the reliability of the motor operation and there is room for improvement. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a stator assembly, which can increase the bonding force between the stator body and the bearing housing, prevent the stator body and the bearing housing from moving relative to each other, and improve the reliability of the motor operation.

[0004] The utility model also provides a motor.

[0005] The utility model also provides a household appliance.

[0006] The stator assembly according to the first aspect embodiment of the utility model is an integral part, and the stator assembly includes: a stator body; a bearing housing, which is arranged in the middle of the stator body and includes a housing body, an axial limiting portion and a radial limiting portion. The axial limiting portion is arranged on the outer periphery of the housing body and extends along the circumferential direction of the housing body. The radial limiting portion is arranged on the outer periphery of the housing body and extends along the axial direction of the housing body. The axial limiting portion and the radial limiting portion cooperate with the stator body respectively to limit the displacement of the stator body.

[0007] For the stator assembly according to the embodiment of the utility model, by arranging the axial limiting portion and the radial limiting portion on the housing body, the axial bonding force between the stator body and the bearing housing can be increased, and the tangential bonding force between the stator body and the bearing housing can also be increased, so as to improve the limiting effect on the stator body, prevent the stator body and the bearing housing from moving relative to each other, and improve the reliability of the motor operation.

[0008] According to some embodiments of the utility model, the radial limiting portion is a limiting block protruding from the outer side surface of the housing body.

[0009] In some examples, the housing body includes a first shaft section and at least one second shaft section, the limiting block is arranged on the outer periphery of the second shaft section, and the diameter of the circumscribed circle corresponding to a plurality of the limiting blocks is D1 mm, the outer diameter of the first shaft section is greater than that of the second shaft section, and the outer diameter of the first shaft section is D 2 mm, D 1 ≤ D 2 .

[0010] In some examples, the stator body includes a stator core and an injection molded part. The stator core is correspondingly matched with the first shaft section, and the injection molded part is correspondingly matched with the second shaft section.

[0011] According to some embodiments of the present invention, the outer side surface of the seat body has a radially inwardly recessed limiting groove, and the limiting groove is the radial limiting portion.

[0012] In some examples, the depth of the limiting groove is d mm, and the wall thickness of the part of the seat body provided with the limiting groove is T mm, satisfying: T / 6 ≤ d ≤ T / 2.

[0013] In some examples, the seat body includes a plurality of shaft sections, and the limiting groove is provided on at least one of the shaft sections.

[0014] According to some embodiments of the present invention, there are a plurality of the radial limiting portions, and the plurality of radial limiting portions are arranged at intervals along the circumferential direction of the seat body.

[0015] In some examples, the central angle corresponding to each radial limiting portion is α°, and the number of the radial limiting portions is n, 60 / n ≤ α ≤ 180 / n.

[0016] In some examples, the number of the radial limiting portions is n, 2 ≤ n ≤ 10.

[0017] According to some embodiments of the present invention, the axial limiting portion is an annular boss protruding from the outer side of the seat body.

[0018] According to some embodiments of the present invention, the axial limiting portion is an arc-shaped boss protruding from the outer side of the seat body, and the axial limiting portion includes a plurality of spaced along the circumferential direction of the seat body.

[0019] According to some embodiments of the present invention, the stator body includes a stator core and an injection molded part. The stator assembly is configured such that the stator core is matched with the bearing seat and the injection molded part is injection molded, so that the stator assembly is formed into an integral part.

[0020] In some examples, the seat body includes a first shaft section and at least one second shaft section. The outer diameter of the first shaft section is greater than that of the second shaft section. The axial limiting portion protrudes from the end of the first shaft section, and the stator core abuts and cooperates with the first shaft section and the axial limiting portion.

[0021] A motor according to an embodiment of the second aspect of the present utility model includes a stator assembly according to an embodiment of the first aspect of the present utility model. By adopting the above stator assembly, the bonding force between the stator body and the bearing seat can be increased, thereby improving the limiting effect on the stator body, preventing the stator body and the bearing seat from moving relative to each other, and improving the reliability of the motor operation.

[0022] A household appliance according to an embodiment of the third aspect of the present utility model includes a motor according to an embodiment of the second aspect of the present utility model. By adopting the above motor, the limiting effect on the stator body can be improved, the reliability of the motor operation can be improved, and thus the reliability of the household appliance operation can be improved.

[0023] The additional aspects and advantages of the present utility model will be partly given in the following description, partly become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0025] Figure 1 is a schematic structural diagram of a stator assembly according to some embodiments of the present utility model;

[0026] Figure 2 is a schematic structural diagram of a bearing seat in one perspective according to some embodiments of the present utility model;

[0027] Figure 3 is a schematic structural diagram of the bearing seat in another perspective according to some embodiments of the present utility model;

[0028] Figure 4 is a schematic structural diagram of the bearing seat in yet another perspective according to some embodiments of the present utility model;

[0029] Figure 5 is a schematic structural diagram of a bearing seat according to other embodiments of the present utility model;

[0030] Figure 6 is a schematic structural diagram of a bearing seat in one perspective according to still other embodiments of the present utility model;

[0031] Figure 7 is a schematic structural diagram of the bearing seat in another perspective according to still other embodiments of the present utility model;

[0032] Figure 8 is a schematic structural diagram of a bearing seat according to yet other embodiments of the present utility model;

[0033] Figure 9It is a schematic structural diagram of a bearing seat according to some embodiments of the present utility model.

[0034] Reference numerals:

[0035] Stator assembly 100, thimble hole 200,

[0036] Stator body 10, stator core 11, injection molded part 12,

[0037] Bearing seat 20, seat body 21, first shaft section 211, second shaft section 212, bearing chamber 213, axial limiting part 22, limiting block 23, limiting groove 24. Detailed implementation manners

[0038] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0039] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0040] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0041] Next, refer to Figures 1-9 Describe the stator assembly 100 according to the embodiments of the present utility model.

[0042] AsFigures 1-9 As shown, the stator assembly 100 according to an embodiment of the present invention is an integral part, and the stator assembly 100 includes a stator body 10 and a bearing seat 20.

[0043] The bearing seat 20 can be arranged in the middle of the stator body 10, and the bearing seat 20 includes a seat body 21, an axial limiting portion 22 and a radial limiting portion. The axial limiting portion 22 can be arranged on the outer periphery of the seat body 21, so that the end face of the axial limiting portion 22 in the axial direction of the seat body 21 (such as Figure 2 the up and down direction shown) contacts the stator body 10, and the axial limiting portion 22 can extend along the circumferential direction of the seat body 21, which can increase the contact area between the axial limiting portion 22 and the stator body 10, thereby increasing the axial bonding force between the bearing seat 20 and the stator body 10, and preventing the bearing seat 20 and the stator body 10 from moving relative to each other along the axial direction of the seat body 21.

[0044] The radial limiting portion can be arranged on the outer periphery of the seat body 21, so that the wall surface of the radial limiting portion in the circumferential direction of the seat body 21 contacts the stator body 10, and the radial limiting portion can extend along the axial direction of the seat body 21 (such as Figure 2 the up and down direction shown), which can increase the contact area between the radial limiting portion and the stator body 10, thereby increasing the tangential bonding force between the bearing seat 20 and the stator body 10, and preventing the bearing seat 20 and the stator body 10 from moving relative to each other along the circumferential direction of the seat body 21.

[0045] Thus, the axial limiting portion 22 and the radial limiting portion can cooperate with the stator body 10 respectively, which can increase the bonding force between the stator body 10 and the bearing seat 20, limit the displacement of the stator body 10, improve the limiting effect on the stator body 10, thereby preventing the stator body 10 and the bearing seat 20 from moving relative to each other during the operation of the motor, and preventing the stator body 10 and the bearing seat 20 from moving relative to each other when the stator assembly 100 is subjected to external forces, and improving the reliability of the motor operation.

[0046] For the stator assembly 100 according to an embodiment of the present invention, by arranging the axial limiting portion 22 and the radial limiting portion on the seat body 21, the axial bonding force between the stator body 10 and the bearing seat 20 can be increased, and the tangential bonding force between the stator body 10 and the bearing seat 20 can be increased, thereby improving the limiting effect on the stator body 10, preventing the stator body 10 and the bearing seat 20 from moving relative to each other, and improving the reliability of the motor operation.

[0047] Such as Figure 1 and Figure 2As shown, according to some embodiments of the present utility model, a bearing chamber 213 is defined within the bearing housing 20 for mounting a bearing. The rotating shaft of the motor can pass through the inner ring of the bearing, and the rotating shaft is rotationally engaged with the bearing housing 20 through the bearing. The rotor assembly of the motor can be connected to the rotating shaft, so that the rotor assembly can rotate relative to the stator assembly 100, which is beneficial to ensuring the normal operation of the motor.

[0048] As Figures 2-5 shown, according to some embodiments of the present utility model, the radial limiting portion can be a limiting block 23. The limiting block 23 can protrude from the outer side (such as the outer side wall surface shown in Figure 2 ) of the seat body 21, so that the stator body 10 can be in contact with the seat body 21 and the limiting block 23 respectively. That is, when the stator body 10 is engaged with the seat body 21, the wall surface of the limiting block 23 in the circumferential direction of the seat body 21 can be in contact with the stator body 10, which can achieve the circumferential limitation of the stator body 10 on the seat body 21 and prevent the bearing housing 20 and the stator body 10 from moving relative to each other along the circumferential direction of the seat body 21.

[0049] As Figure 1 and Figure 2 shown, in some examples, the seat body 21 includes a first shaft section 211 and at least one second shaft section 212. Among them, the first shaft section 211 and the second shaft section 212 are arranged along the axial direction of the seat body 21 (such as the up and down direction shown in Figure 2 ), and the second shaft section 212 can be arranged at the end of the first shaft section 211 (such as the upper end or the lower end shown in Figure 2 ). A part of the stator body 10 (for example, the stator core 11) can be installed on the first shaft section 211 through the second shaft section 212, which can achieve the positioning of the installation of the stator body 10 and is convenient for operation.

[0050] In addition, the ejector pin hole 200 of the injection mold can be engaged with the second shaft section 212, that is, the ejector pin hole 200 of the injection mold can extend along the axial direction of the seat body 21. The ejector pin hole 200 can be located on the outer circumference of the second shaft section 212, and the ejector pin hole 200 can be in position correspondence with the axial limiting portion 22, which is beneficial to achieving the fixation of the bearing housing 20 and can achieve the positioning of the injection of the stator body 10, so as to facilitate the injection of another part of the stator body 10 (for example, the injection molded part 12).

[0051] Thus, by installing a part of the stator body 10 on the bearing housing 20 and injecting another part of the stator body 10 on the bearing housing 20, the injection molding of the stator assembly 100 can be achieved. Then, the ejector pin of the injection mold can abut against the axial limiting portion 22 through the ejector pin hole 200 to eject the stator assembly 100.

[0052] Among them, the number of the second shaft segments 212 can be one, and the second shaft segment 212 can be arranged at one end of the first shaft segment 211 in the axial direction of the seat body 21 (such as Figure 2 the upper end or the lower end shown), which is beneficial to realizing the positioning of the installation of the stator body 10; alternatively, the number of the second shaft segments 212 can be two, and the two second shaft segments 212 can be respectively arranged at both ends of the first shaft segment 211 in the axial direction of the seat body 21 (such as Figure 2 the upper end and the lower end shown), and on the basis of realizing the positioning of the installation of the stator body 10, the positioning of the injection molding of the stator body 10 can be realized, which is convenient for operation.

[0053] Such as Figure 2 , Figure 3 and Figure 4 shown, the limiting block 23 can be arranged on the outer periphery of the second shaft segment 212, and the diameter of the circumscribed circle corresponding to the plurality of limiting blocks 23 is D 1 mm, the outer diameter of the first shaft segment 211 is D 2 mm, the outer diameter of the first shaft segment 211 is greater than the outer diameter of the second shaft segment 212, that is, D 1 ≤D 2 . Thus, on the basis of realizing the limiting of the stator body 10 on the seat body 21, the interference between the stator body 10 and the limiting block 23 during the installation process can be prevented, and a part of the stator body 10 can be ensured to be installed on the first shaft segment 211 through the second shaft segment 212, which is convenient for operation.

[0054] Specifically, the number of the second shaft segments 212 can be two, and the two second shaft segments 212 are respectively arranged at both ends of the first shaft segment 211 in the axial direction of the seat body 21 (such as Figure 2 the upper end and the lower end shown), as Figure 2 shown, the limiting block 23 can be arranged on one second shaft segment 212, or, as Figure 5 shown, the limiting block 23 can be arranged on the two second shaft segments 212.

[0055] Such as Figure 1 and Figure 2 shown, in some examples, the stator body 10 includes a stator core 11 and an injection molded part 12. The stator core 11 can be correspondingly matched with the first shaft segment 211, that is, the stator core 11 can be installed on the first shaft segment 211 through the second shaft segment 212, and the pre-installation of the stator core 11 can be realized. The injection molded part 12 can be correspondingly matched with the second shaft segment 212, that is, an operator can pour the injection molded part 12 on the bearing seat 20 and the stator core 11 so that the stator assembly 100 forms an integral part, which is beneficial to improving the structural strength of the stator assembly 100.

[0056] Among them, after the injection molded part 12 is cast and formed, the limiting block 23 contacts the injection molded part 12 on the circumferential wall surface of the seat body 21, which can limit the injection molded part 12, thereby limiting the stator body 10 and preventing the bearing seat 20 and the stator body 10 from moving relative to each other along the circumferential direction of the seat body 21.

[0057] As Figures 6-9 shown, according to some embodiments of the present invention, the radial limiting portion may be a limiting groove 24, and the limiting groove 24 is located on the outer side wall surface of the seat body 21 (such as Figure 6 the outer side shown), and the limiting groove 24 may be recessed inward (such as Figure 6 the direction from outside to inside shown). Thus, after the injection molded part 12 is cast and formed, a part of the injection molded part 12 is located in the limiting groove 24, and the wall surface of the limiting groove 24 in the circumferential direction of the seat body 21 contacts the injection molded part 12, which can limit the injection molded part 12, thereby limiting the stator body 10 and preventing the bearing seat 20 and the stator body 10 from moving relative to each other along the circumferential direction of the seat body 21.

[0058] In some examples, the seat body 21 includes a plurality of shaft segments, and the limiting groove 24 is provided on at least one shaft segment. For example, the seat body 21 may include a first shaft segment 211 and two second shaft segments 212. The two second shaft segments 212 may be respectively arranged at both ends of the first shaft segment 211 in the axial direction of the seat body 21 (such as Figure 6 the upper end and the lower end shown), and the limiting groove 24 may be provided on the first shaft segment 211.

[0059] Thus, on the basis of ensuring that the stator core 11 is pre-installed on the first shaft segment 211, a part of the injection molded part 12 can enter the limiting groove 24 on the first shaft segment 211 during injection molding, and the limiting groove 24 can be provided on the second shaft segment 212, so as to increase the contact area between the limiting groove 24 and the injection molded part 12, thereby increasing the tangential bonding force between the bearing seat 20 and the stator body 10 and preventing the bearing seat 20 and the stator body 10 from moving relative to each other along the circumferential direction of the seat body 21.

[0060] As Figure 7 shown, in some examples, the depth of the limiting groove 24 is d mm, and the wall thickness of the shaft segment of the seat body 21 having the limiting groove 24 is T mm. For example, the limiting groove 24 may be provided on the second shaft segment 212, and the wall thickness of the second shaft segment 212 is T mm. Among them, if the limiting groove 24 is too deep, the wall thickness of the seat body 21 at the limiting groove 24 becomes thinner, which is likely to reduce the structural strength of the seat body 21 and easily deform the seat body 21. If the limiting groove 24 is too shallow, the contact area between the side wall of the limiting groove 24 and the stator body 10 becomes smaller, that is, the tangential bonding force between the bearing seat 20 and the stator body 10 is insufficient, which is likely to cause the bearing seat 20 and the stator body 10 to move relative to each other, affecting the reliability of the motor operation.

[0061] Thus, d can be limited between T / 6 and T / 2. d can be any one of the values of T / 6, T / 4, T / 3, 5T / 12, and T / 2 or the range value between any two of them, which can improve the structural strength of the seat body 21, prevent the seat body 21 from deforming during the injection molding process of the stator body 10, and prevent the seat body 21 from deforming when the stator assembly 100 is subjected to external forces. At the same time, the tangential bonding force between the bearing seat 20 and the stator body 10 can be ensured, preventing the bearing seat 20 and the stator body 10 from moving relative to each other, and improving the reliability of the motor operation.

[0062] As Figures 2-9 shown, according to some embodiments of the present invention, there are multiple radial limiting portions. The multiple radial limiting portions can be arranged at intervals along the circumferential direction of the seat body 21. Among them, the radial limiting portion can be a limiting block 23, and the radial limiting portion can be a limiting groove 24. The limiting block 23 can be arranged on the second shaft section 212, and the multiple limiting blocks 23 can be arranged at intervals along the circumferential direction of the seat body 21. The limiting groove 24 can be arranged on the first shaft section 211, and the limiting groove 24 can be arranged on the second shaft section 212, and the multiple limiting grooves 24 can be arranged at intervals along the circumferential direction of the seat body 21.

[0063] Thus, by arranging multiple radially spaced-apart limiting portions in the circumferential direction of the seat body 21, the tangential bonding force between the stator body 10 and the bearing seat 20 can be dispersed, preventing the bearing seat 20 from being damaged due to concentrated stress, being beneficial to the structural strength of the bearing seat 20, and being beneficial to improving the service life of the stator assembly 100.

[0064] As Figure 4 shown, in some examples, the central angle corresponding to each radial limiting portion is α°, and the number of radial limiting portions is n. If the central angle corresponding to each radial limiting portion is too large, the structural strength of the seat body 21 will be reduced, and the seat body 21 is likely to deform. If the central angle corresponding to each radial limiting portion is too small, the contact area between the radial limiting portion and the stator body 10 becomes smaller, that is, the tangential bonding force between the bearing seat 20 and the stator body 10 is insufficient, and the bearing seat 20 and the stator body 10 are likely to move relative to each other, affecting the reliability of the motor operation.

[0065] Thus, α can be limited between 60 / n - 180 / n. α can be any one of the values of 60 / n, 80 / n, 100 / n, 120 / n, 140 / n, 160 / n, 180 / n or the range value between any two of them. This can improve the structural strength of the seat body 21, prevent the seat body 21 from deforming during the injection molding process of the stator body 10, and prevent the seat body 21 from deforming when the stator assembly 100 is subjected to external forces. At the same time, it can ensure the tangential bonding force between the bearing seat 20 and the stator body 10, prevent the bearing seat 20 and the stator body 10 from moving relative to each other, and improve the reliability of the motor operation.

[0066] In some examples, the number of the radial limiting parts is n. If the number of the radial limiting parts is too large, the structural strength of the seat body 21 will be reduced and the seat body 21 is likely to deform. If the central angle corresponding to each radial limiting part is too small, the contact area between the multiple radial limiting parts and the stator body 10 will become smaller, that is, the tangential bonding force between the bearing seat 20 and the stator body 10 is insufficient, and the bearing seat 20 and the stator body 10 are likely to move relative to each other, affecting the reliability of the motor operation.

[0067] Thus, n can be limited between 2 and 10. n can be any one of the values of 2, 4, 6, 8, 10 or the range value between any two of them. This can improve the structural strength of the seat body 21, prevent the seat body 21 from deforming during the injection molding process of the stator body 10, and prevent the seat body 21 from deforming when the stator assembly 100 is subjected to external forces. At the same time, it can ensure the tangential bonding force between the bearing seat 20 and the stator body 10, prevent the bearing seat 20 and the stator body 10 from moving relative to each other, and improve the reliability of the motor operation.

[0068] Such as Figure 4 and Figure 6 shown, according to some embodiments of the present invention, the wall surface of the side of the limiting block 23 facing away from the seat body 21 (such as the outer side shown in Figure 4 can be fan-shaped, circular arc-shaped or rectangular, which is beneficial to increasing the contact area between the limiting block 23 and the injection molded part 12, increasing the bonding force between the bearing seat 20 and the stator body 10, preventing the bearing seat 20 and the stator body 10 from moving relative to each other, and being convenient for processing; the bottom wall of the limiting groove 24 can be fan-shaped, circular arc-shaped or rectangular, which is beneficial to increasing the contact area between the limiting groove 24 and the injection molded part 12, increasing the bonding force between the bearing seat 20 and the stator body 10, preventing the bearing seat 20 and the stator body 10 from moving relative to each other, and being convenient for processing.

[0069] Such as Figure 5 and Figure 6 shown, according to some embodiments of the present invention, the axial limiting part 22 can protrude outside the seat body 21 (such as Figure 6The annular boss on the outer side (as shown) can increase the contact area between the axial limiting portion 22 and the stator body 10, thereby increasing the axial bonding force between the bearing seat 20 and the stator body 10, improving the axial limiting effect on the stator body 10, and preventing the bearing seat 20 and the stator body 10 from moving axially relative to each other along the seat body 21.

[0070] As Figure 8 shown, it can be understood that the inner side of the annular boss (as shown in Figure 8 the inner side shown) can have a through - opening, and the position of the through - opening corresponds to the position of the limiting groove 24, that is, the through - opening can connect the limiting groove 24 on the first shaft section 211 and the limiting groove 24 on the second shaft section 212, so as to increase the area of the wall surface of the limiting groove 24 in the circumferential direction of the seat body 21, thereby improving the circumferential limiting effect on the stator body 10 in the seat body 21, preventing the bearing seat 20 and the stator body 10 from moving circumferentially relative to each other along the seat body 21, and improving the reliability of the motor operation.

[0071] As Figure 9 shown, according to some embodiments of the present invention, the axial limiting portion 22 can be an arc - shaped boss protruding from the outer side of the seat body 21 (as shown in Figure 9 the outer side shown), and the axial limiting portion 22 includes a plurality of spaced circumferentially along the seat body 21, that is, the number of arc - shaped bosses can be multiple, and the multiple arc - shaped bosses can be spaced circumferentially along the seat body 21, so as to achieve the axial (as shown in Figure 9 the up - and - down direction shown) limiting of the stator body 10 in the seat body 21, preventing the bearing seat 20 and the stator body 10 from moving axially relative to each other along the seat body 21.

[0072] Among them, there is a gap between two adjacent arc - shaped bosses, and the position of the gap can correspond to the position of the limiting groove 24, which can increase the area of the wall surface of the limiting groove 24 in the circumferential direction of the seat body 21, thereby improving the circumferential limiting effect on the stator body 10 in the seat body 21, preventing the bearing seat 20 and the stator body 10 from moving circumferentially relative to each other along the seat body 21, and improving the reliability of the motor operation.

[0073] It can be understood that the limiting groove 24 or the limiting block 23 can penetrate the bearing seat 20 axially (as shown in Figure 9 the up - and - down direction shown) of the seat body 21, which can increase the area of the wall surface of the limiting groove 24 in the circumferential direction of the seat body 21, thereby improving the circumferential limiting effect on the stator body 10 in the seat body 21, preventing the bearing seat 20 and the stator body 10 from moving circumferentially relative to each other along the seat body 21, and being convenient for processing at the same time.

[0074] As Figure 1As shown, according to some embodiments of the present utility model, the stator body 10 includes a stator core 11 and an injection molded part 12. The stator core 11 can cooperate with the bearing housing 20, and an operator can cast the injection molded part 12 on the bearing housing 20 and the stator core 11, so that the stator assembly 100 is formed as an integral part, which can improve the structural strength of the stator assembly 100 and is convenient for processing.

[0075] As Figure 1 and Figure 2 shown in some examples, the seat body 21 includes a first shaft section 211 and at least one second shaft section 212. The outer diameter of the first shaft section 211 is greater than that of the second shaft section 212, and the second shaft section 212 can be arranged at the end of the first shaft section 211 (such as Figure 2 the upper and lower ends shown), and the axial limiting part 22 can be arranged at the end of the first shaft section 211 (such as Figure 2 the upper end shown), and the axial limiting part 22 can protrude from the first shaft section 211.

[0076] Thus, when the stator core 11 is installed on the first shaft section 211, the stator core 11 can be in contact with the wall surface of the axial limiting part 22 in the axial direction of the seat body 21 (such as Figure 2 the up and down direction shown), which can realize the limitation of the stator core 11 and the positioning of the injection molding of the stator body 10, so as to facilitate the casting of the injection molded part 12.

[0077] In some examples, the injection molded part 12 can be injection molded from injection plastics such as BMC (bulk molding compound), which can improve the dimensional stability and dimensional accuracy of the injection molded part 12, and can improve the insulation of the injection molded part 12, so as to ensure the safe operation of the motor and is beneficial to improving the reliability of the motor operation.

[0078] The motor according to the embodiment of the present utility model includes a stator assembly 100. By adopting the above stator assembly 100, the bonding force between the stator body 10 and the bearing housing 20 can be increased, so as to improve the limiting effect on the stator body 10, prevent the stator body 10 and the bearing housing 20 from moving relative to each other, and improve the reliability of the motor operation.

[0079] The household appliance according to the embodiment of the present utility model includes a motor. By adopting the above motor, the limiting effect on the stator body 10 can be improved, the reliability of the motor operation can be improved, and thus the reliability of the household appliance operation can be improved.

[0080] In the present application, the household appliance can be a refrigerator, a freezer or an air conditioner, etc.; of course, the motor of the present application can also be applied to vehicles, aircraft, computers or energy storage cabinets, etc.

[0081] Other components and operations of the motor according to the embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail here. In the description of the present utility model, "the first feature" and "the second feature" may include one or more of such features. Among them, the up-down direction, left-right direction, and front-back direction are subject to the up-down direction, left-right direction, and front-back direction shown in the figure.

[0082] In the description of the present utility model, unless otherwise clearly specified and limited, when the first feature is "above" or "below" the second feature, it may include direct contact between the first and second features, or may include that the first and second features are not in direct contact but in contact through other features therebetween. Moreover, when the first feature is "above", "over" and "on" the second feature, it includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature.

[0083] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0084] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A stator assembly, characterized in that: The stator assembly is an integrated part, and the stator assembly comprises: stator body; A bearing seat, the bearing seat is arranged in the middle part of the stator body and includes a seat body, an axial limiting portion and a radial limiting portion, the axial limiting portion is arranged on the outer periphery of the seat body and extends along the circumferential direction of the seat body, the radial limiting portion is arranged on the outer periphery of the seat body and extends along the axial direction of the seat body, the axial limiting portion and the radial limiting portion respectively cooperate with the stator body to limit the displacement of the stator body.

2. The stator assembly according to claim 1, characterized in that: The radial limiting portion is a limiting block protruding from the outer side surface of the seat body.

3. The stator assembly according to claim 2, characterized in that: The seat body includes a first shaft segment and at least one second shaft segment, the limit block is arranged on the outer circumference of the second shaft segment, the diameter of the circumscribed circle corresponding to the multiple limit blocks is D1mm, the outer diameter of the first shaft segment is larger than the outer diameter of the second shaft segment and the outer diameter of the first shaft segment is D2mm, D1≤D2.

4. The stator assembly according to claim 3, characterized in that: The stator body comprises a stator core and an injection molded part. The stator core is matched with the first shaft segment, and the injection molded part is matched with the second shaft segment.

5. The stator assembly according to claim 1, characterized in that: The outer side surface of the seat body has an inwardly recessed limiting groove, and the limiting groove is the radial limiting portion.

6. The stator assembly according to claim 5, characterized in that: The depth of the limiting groove is dmm, and the wall thickness of the portion of the seat body where the limiting groove is provided is Tmm, satisfying: T / 6≤d≤T / 2.

7. The stator assembly according to claim 5, characterized in that: The seat body comprises a plurality of shaft segments, and the limiting groove is arranged on at least one of the shaft segments.

8. The stator assembly according to claim 1, characterized in that: The radial limiting portions include a plurality of radial limiting portions, and the plurality of radial limiting portions are arranged at intervals along the circumferential direction of the seat body.

9. The stator assembly according to claim 8, characterized in that: The central angle corresponding to each radial limiting portion is α°, the number of the radial limiting portions is n, and 60 / n≤α≤180 / n.

10. The stator assembly according to claim 8, characterized in that: The number of the radial limiting parts is n, 2≤n≤10.

11. The stator assembly according to claim 1, characterized in that: The axial limiting portion is an annular boss protruding out of the outer side of the seat body.

12. The stator assembly according to claim 1, characterized in that: The axial limiting portion is an arc-shaped boss protruding out of the outer side of the seat body, and the axial limiting portion includes a plurality of axial limiting portions spaced apart along the circumferential direction of the seat body.

13. The stator assembly according to any one of claims 1 to 12, characterized in that: The stator body includes a stator core and an injection molded part. The stator assembly is constructed such that the stator core cooperates with the bearing seat and the injection molded part is injection molded, so that the stator assembly is formed into an integrated part.

14. The stator assembly according to claim 13, characterized in that: The seat body includes a first shaft segment and at least one second shaft segment, the outer diameter of the first shaft segment is larger than the outer diameter of the second shaft segment, the axial limit portion protrudes from the end of the first shaft segment, and the stator core is in abutment with the first shaft segment and the axial limit portion.

15. A motor, characterized in that: Comprising a stator assembly according to any one of claims 1-14.

16. A household appliance, characterized in that: Comprising the stator assembly according to claim 15.

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