Rotor assembly, motor and household appliance

Abstract

The utility model discloses a rotor assembly, a motor and a household electrical appliance, the rotor assembly comprises an inner iron core, an outer iron core, a plurality of magnetic shoes, a plastic package body and a damping body, and the outer iron core is arranged along the periphery of the inner iron core; the plurality of magnetic shoes are mounted on the outer peripheral wall of the outer iron core and are arranged at intervals in the circumferential direction of the outer iron core; the plastic package body is plastic-coated on the magnetic shoes and the outer iron core, the plastic package body comprises a flange, the flange protrudes out of the inner circumferential wall of the outer iron core towards the inner iron core, and the flange and the inner iron core are arranged in a staggered manner in the axial direction of the rotor assembly; the damping body is filled between the inner iron core and the outer iron core, the damping body is provided with a concave part, an opening of the concave part faces the outer iron core, and the flange is contained in the concave part. The rotor assembly provided by the utility model can increase the axial constraint between the plastic package body and the damping body and enhance the combination of the plastic package body and the damping body, thereby increasing the binding force between the outer iron core and the inner iron core and effectively ensuring the damping effect.

Description

Technical Field

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

[0002] For surface-mounted rotor motors, in order to ensure the installation stability of the magnetic tiles and improve the motor noise, in the related technology, engineering plastics are coated on the magnetic tiles and the outer iron core of the rotor, so that the magnetic tiles are firmly installed on the outer iron core, and elastic shock-absorbing materials are filled between the outer iron core and the inner iron core of the rotor to reduce vibration and achieve the purpose of improving the motor noise. However, in the existing motor structure, due to the large difference in shrinkage between engineering plastics and elastic shock-absorbing materials, gaps will be generated at the joints of engineering plastics and elastic shock-absorbing materials, resulting in a small bonding force between the outer iron core and the inner iron core, and relative displacement between the outer iron core and the inner iron core is easy to occur, especially under falling conditions, the outer iron core and the inner iron core will separate. At the same time, since the radial thickness of the elastic shock-absorbing material between the outer iron core and the inner iron core is one of the factors that determine the shock-absorbing effect, how to form an effective axial constraint between the engineering plastics and the elastic shock-absorbing material and reduce the impact on the shock-absorbing effect is a problem that still needs to be solved. 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 rotor assembly that can increase the axial constraint between the plastic sealing body and the shock absorbing body and strengthen the combination of the plastic sealing body and the shock absorbing body, thereby increasing the bonding force between the outer iron core and the inner iron core and effectively ensuring the shock absorbing effect.

[0004] The utility model also provides a motor and a household appliance having the rotor assembly.

[0005] According to the rotor assembly of the first aspect embodiment of the utility model, it includes an inner iron core; an outer iron core, arranged along the outer periphery of the inner iron core; a plurality of magnetic tiles, installed on the outer peripheral wall of the outer iron core and arranged at intervals along the circumference of the outer iron core; a plastic sealing body, covering the magnetic tiles and the outer iron core, the plastic sealing body including a flange, the flange protruding from the inner peripheral wall of the outer iron core toward the inner iron core, and the flange and the inner iron core are staggered in the axial direction of the rotor assembly; a shock absorber, filled between the inner iron core and the outer iron core, the shock absorber is provided with a recess, the opening of the recess faces the outer iron core, and the flange is accommodated in the recess.

[0006] According to the rotor assembly of the first embodiment of the utility model, there are at least the following beneficial effects: since the plastic encapsulation body is plastic-wrapped around the magnetic tile and the outer iron core, and the shock absorber is filled between the inner iron core and the outer iron core, the plastic encapsulation body is combined with the outer iron core and the magnetic tile, and the shock absorber is combined with the outer iron core and the inner iron core. By providing a flange protruding toward the inner iron core on the plastic encapsulation body, and providing a recessed portion capable of accommodating the flange on the shock absorber, the axial constraint between the plastic encapsulation body and the shock absorber is increased. Moreover, since the flange is a part of the plastic encapsulation body, the deformation amount is small, which is conducive to enhancing the combination of the shock absorber and the plastic encapsulation body, thereby increasing the bonding force between the outer iron core and the inner iron core. During the rotation process of the rotor assembly or under the condition of falling, the relative displacement or separation between the outer iron core and the inner iron core is avoided, which is conducive to improving the structural stability of the rotor assembly. At the same time, since the flange and the inner iron core are staggered in the axial direction of the rotor assembly, the radial thickness of the shock absorber filled between the inner iron core and the outer iron core is large, which effectively ensures the shock absorption effect.

[0007] According to some embodiments of the present invention, the flange is located at the end of the plastic packaging body along the axial direction, and the recess is provided on the end surface of the shock absorbing body along the axial direction.

[0008] According to some embodiments of the utility model, the plastic sealing body is provided with flanges at both ends along the axial direction, and the two end surfaces of the shock absorbing body along the axial direction are provided with recesses, and the flanges at both ends are correspondingly accommodated in the recesses at both ends.

[0009] According to some embodiments of the utility model, the shock absorber includes a first end wall and a second end wall, the first end wall and the second end wall are located at the two ends of the shock absorber along the axial direction and are respectively coated with partial end surfaces of the outer iron core along the two ends of the axial direction, along the axial direction, the thickness of the first end wall is less than the thickness of the second end wall, and the first end wall and the flange are located at the same end of the rotor assembly along the axial direction.

[0010] According to some embodiments of the utility model, the plastic package body also includes at least one connecting strip, which is arranged along the axial direction and abuts against the inner circumferential wall of the outer iron core, the flange is connected to the connecting strip, and the flange protrudes from the side wall of the connecting strip, and the shock absorbing body is provided with a concave cavity for accommodating the connecting strip, and the concave portion is provided on the side wall of the concave cavity.

[0011] According to some embodiments of the present invention, there are multiple connecting strips, and the multiple connecting strips are arranged at intervals along the circumferential direction, and each of the connecting strips is connected to the flange.

[0012] According to some embodiments of the utility model, the plastic sealing body is provided with a feeding hole, which is formed on the flange and passes through two end surfaces of the flange along the axial direction, and the shock absorbing body includes a connecting column, which is accommodated in the feeding hole.

[0013] According to some embodiments of the utility model, the plastic sealing body is provided with a feed hole, the feed hole is formed on the connecting strip and arranged along the axial direction, the feed hole passes through a portion of the side wall of the connecting strip facing the inner iron core, and the shock absorbing body includes a connecting column, which is accommodated in the feed hole.

[0014] The motor according to the embodiment of the second aspect of the utility model includes the rotor assembly of the embodiment of the first aspect of the utility model.

[0015] The motor according to the second embodiment of the utility model has at least the following beneficial effects: the motor adopts the above-mentioned rotor assembly, the plastic encapsulation body is plastic-wrapped around the magnetic tile and the outer iron core, and the shock absorber is filled between the inner iron core and the outer iron core, so that the plastic encapsulation body is combined with the outer iron core and the magnetic tile, and the shock absorber is combined with the outer iron core and the inner iron core. By providing a flange protruding toward the inner iron core on the plastic encapsulation body, and providing a recessed portion capable of accommodating the flange on the shock absorber, the axial constraint between the plastic encapsulation body and the shock absorber is increased, and since the flange is a part of the plastic encapsulation body, the deformation amount is small, which is conducive to enhancing the combination of the shock absorber and the plastic encapsulation body, thereby increasing the bonding force between the outer iron core and the inner iron core, and avoiding relative displacement or separation between the outer iron core and the inner iron core during the rotation of the rotor assembly or under the condition of falling, which is conducive to improving the structural stability of the rotor assembly. At the same time, since the flange and the inner iron core are staggered in the axial direction of the rotor assembly, the radial thickness of the shock absorber filled between the inner iron core and the outer iron core is large, which effectively ensures the shock absorption effect.

[0016] A household appliance according to an embodiment of the third aspect of the utility model includes the motor according to the embodiment of the second aspect of the utility model.

[0017] According to the household appliance of the third aspect of the utility model, at least the following beneficial effects are achieved: the household appliance adopts the above-mentioned motor, and the plastic package is plastic-wrapped around the magnetic tile and the outer iron core, and the shock absorber is filled between the inner iron core and the outer iron core, so that the plastic package is combined with the outer iron core and the magnetic tile, and the shock absorber is combined with the outer iron core and the inner iron core. By providing a flange protruding toward the inner iron core on the plastic package, and providing a recessed portion capable of accommodating the flange on the shock absorber, the axial constraint between the plastic package and the shock absorber is increased, and since the flange is a part of the plastic package, the deformation is small, which is conducive to enhancing the combination of the shock absorber and the plastic package, thereby increasing the bonding force between the outer iron core and the inner iron core, and avoiding relative displacement or separation between the outer iron core and the inner iron core during the rotation of the rotor assembly or under the condition of falling, which is conducive to improving the structural stability of the rotor assembly. At the same time, since the flange and the inner iron core are staggered in the axial direction of the rotor assembly, the radial thickness of the shock absorber filled between the inner iron core and the outer iron core is large, which effectively ensures the shock absorption effect.

[0018] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Brief Description of the Drawings

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments, where:

[0020] Figure 1 is a schematic structural diagram of a rotor assembly in an embodiment of the present utility model;

[0021] Figure 2 is Figure 1 a cross-sectional view of the rotor assembly shown;

[0022] Figure 3 is Figure 1 a schematic structural diagram of the plastic-sealed body of the rotor assembly shown;

[0023] Figure 4 is Figure 1 a schematic structural diagram of the shock-absorbing body of the rotor assembly shown;

[0024] Figure 5 is Figure 1 a cross-sectional view of the rotor assembly shown in another direction;

[0025] Figure 6 is a schematic structural diagram of a rotor assembly in another embodiment of the present utility model;

[0026] Figure 7 is Figure 6 a schematic structural diagram of the plastic-sealed body of the rotor assembly shown;

[0027] Figure 8 is Figure 6 a schematic structural diagram of the shock-absorbing body of the rotor assembly shown;

[0028] Figure 9 is Figure 6 a cross-sectional view of the rotor assembly shown.

[0029] Reference Numerals:

[0030] Inner iron core 100; first tooth portion 110;

[0031] Outer iron core 200; second tooth portion 210;

[0032] Magnetic tile 300;

[0033] Plastic-sealed body 400; connecting strip 410; third end wall 420; fourth end wall 430; flange 440; material-passing hole 450;

[0034] Vibration damping body 500; concave cavity 510; first end wall 520; second end wall 530; concave portion 540; connecting column 550. Detailed implementation mode

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having 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 invention and should not be construed as a limitation of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention 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 therefore should not be construed as a limitation of the present invention.

[0037] In the description of the present invention, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", "assembled", "matched", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0039] Refer to Figures 1 to 9 As shown, an embodiment of the first aspect of the present invention provides a rotor assembly, which is applied to the motor of household appliances. The household appliances can be air conditioners, washing machines, refrigerators, etc.

[0040] Refer to Figure 1 And Figure 2As shown, it can be understood that the rotor assembly is a surface-mounted rotor structure. Specifically, the rotor assembly includes an inner iron core 100, an outer iron core 200, a plurality of magnetic tiles 300, a plastic sealing body 400, and a shock-absorbing body 500. Generally speaking, the inner iron core 100 and the outer iron core 200 are respectively composed of a plurality of punching sheets stacked along the axial direction of the rotor assembly. The axial direction of the rotor assembly is the direction of the rotation axis of the rotor assembly, the circumferential direction of the rotor assembly is the direction around the rotation axis, and the radial direction of the rotor assembly is the direction perpendicular to the rotation axis and pointing from the outer peripheral wall of the rotor assembly to the rotation axis and its reverse direction. The axial direction of the inner iron core 100 and the axial direction of the outer iron core 200 are the axial direction of the rotor assembly, the circumferential direction of the inner iron core 100 and the circumferential direction of the outer iron core 200 are the circumferential direction of the rotor assembly, and the radial direction of the inner iron core 100 and the radial direction of the outer iron core 200 are the radial direction of the rotor assembly. For the convenience of description, the main bodies of the following-recorded axial direction, circumferential direction, and radial direction are all the rotor assembly. In addition, it is defined that along the radial direction, the side close to the rotation axis is the inner side, and the side far from the rotation axis is the outer side.

[0041] Referring to Figure 1 and Figure 2 As shown, it can be understood that both the inner iron core 100 and the outer iron core 200 are annular. Among them, a shaft hole penetrating along the axial direction is provided at the middle position of the inner iron core 100 for installing the rotating shaft of the rotor assembly. The inner iron core 100 further includes a plurality of first tooth portions 110. For example, the number of the first tooth portions 110 is four. The first tooth portions 110 protrude outward along the radial direction, and the plurality of first tooth portions 110 are arranged at equal intervals along the circumferential direction. On the projection plane perpendicular to the axial direction, the projection of the first tooth portion 110 is substantially T-shaped. The outer iron core 200 is arranged along the outer periphery of the inner iron core 100 and surrounds it for one week. And in the radial direction, there is a gap between the outer iron core 200 and the inner iron core 100. The outer iron core 200 includes a plurality of second tooth portions 210. For example, the number of the second tooth portions 210 is four. The second tooth portions 210 protrude inward along the radial direction, and the plurality of second tooth portions 210 are arranged at equal intervals along the circumferential direction. Similarly, on the projection plane perpendicular to the axial direction, the projection of the second tooth portion 210 is substantially T-shaped.

[0042] Referring to Figure 1 and Figure 2 As shown, it can be understood that in this embodiment, the number of the magnetic tiles 300 is eight. Of course, the number of the magnetic tiles 300 can also be six, ten, etc. The plurality of magnetic tiles 300 are installed on the outer peripheral wall of the outer iron core 200 and arranged at equal intervals along the circumferential direction. Generally speaking, the magnetic tiles 300 are adhesively bonded to the outer peripheral wall of the outer iron core 200 through glue to achieve preliminary fixation and positioning, or the magnetic tiles 300 are not adhesively bonded to the outer iron core 200 and the magnetic tiles 300 are positioned on the outer peripheral wall of the outer iron core 200 through a mold.

[0043] Referring to Figure 3 and Figure 5As shown, it can be understood that the plastic encapsulation body 400 is made of engineering plastics through an injection molding process. Specifically, the engineering plastics are injected into the molds of the positioning magnetic tiles 300 and the outer iron core 200. After cooling, the engineering plastics form the plastic encapsulation body 400, and the plastic encapsulation body 400 wraps the magnetic tiles 300 and the outer iron core 200, so that the magnetic tiles 300 are fixedly installed on the outer peripheral wall of the outer iron core 200. The plastic encapsulation body 400 includes a third end wall 420 and a fourth end wall 430. The third end wall 420 and the fourth end wall 430 are respectively located at both axial ends of the plastic encapsulation body 400. The third end wall 420 and the fourth end wall 430 respectively cover the end faces of the outer iron core 200 located at both axial ends, and both the third end wall 420 and the fourth end wall 430 only cover a part of the end face of the outer iron core 200, for example, only cover the annular area near the outside in the end face, so as to form an axial constraint between the plastic encapsulation body 400 and the outer iron core 200, combine the plastic encapsulation body 400 with the outer iron core 200, and ensure the installation stability of the magnetic tiles 300.

[0044] Referring to Figure 3 , Figure 4 and Figure 5As shown, it can be understood that the shock absorbing body 500 is made of elastic shock absorbing material through injection molding process. The elastic shock absorbing material can be rubber, etc. The shock absorbing body 500 has a certain elasticity and can play a certain buffering effect when subjected to force, absorb impact energy, and achieve the effect of shock absorption. On the basis that the plastic package body 400 is plastic-wrapped on the magnetic tile 300 and the outer iron core 200 to form a whole, the inner iron core 100 is positioned inside the above-mentioned whole through a mold, and the elastic shock absorbing material is injected into the space between the outer iron core 200 and the inner iron core 100. The elastic shock absorbing material after cooling forms the shock absorbing body 500, so that the shock absorbing body 500 wraps the inner iron core 100 and part of the outer iron core 200. The shock absorber 500 includes a first end wall 520 and a second end wall 530, which are respectively located at two ends of the shock absorber 500 in the axial direction. The first end wall 520 and the second end wall 530 respectively cover the end faces of the inner core 100 at the two ends in the axial direction, and the first end wall 520 and the second end wall 530 also cover another part of the end faces at the two ends in the axial direction of the outer core 200. Generally speaking, the end faces of the two ends of the plastic package 400 are flush with the end faces of the two ends of the shock absorber 500 to ensure that the end faces of the rotor assembly are flush, which is convenient for installation. In this way, an axial constraint is formed between the shock absorber 500 and the inner core 100, and an axial constraint is also formed between the shock absorber 500 and the outer core 200. Since the inner core 100 has the first tooth portion 110 and the outer core 200 has the second tooth portion 210, it is easy to understand that the shock absorber 500 is wrapped around the first tooth portion 110 and the second tooth portion 210, so that the shock absorber 500 forms radial constraints and circumferential constraints with the inner core 100 and the outer core 200 respectively, so that the inner core 100 and the outer core 200 are combined with each other to ensure the structural stability of the rotor assembly. At the same time, the shock absorber 500 can provide a buffering effect, reduce vibration, and reduce operating noise.

[0045] It is understandable that due to the large differences in shrinkage rates of engineering plastics, elastic shock-absorbing materials, inner core 100, and outer core 200, engineering plastics and elastic shock-absorbing materials shrink after cooling, and gaps will appear at the joints between engineering plastics and elastic shock-absorbing materials, reducing the contact area, axial friction, and axial bonding. At the same time, based on the fact that the shock-absorbing body 500 only wraps part of the end surface of the outer core 200, the bonding force between the shock-absorbing body 500 and the outer core 200 will be smaller, especially the axial bonding force will deteriorate. In this way, the bonding effect between the inner core 100 and the outer core 200 will be poor, and relative displacement or separation will easily occur. It is easy to understand that the bonding force can be understood as the reaction force of the force applied when the two components are just separated.

[0046] Reference Figure 3 , Figure 4 and Figure 5As shown, it can be understood that generally, along the axial direction, the height of the inner iron core 100 is less than that of the outer iron core 200, and the axial two ends of the outer iron core 200 protrude from the axial two ends of the inner iron core 100 respectively. The plastic package 400 includes a flange 440, which is located on the inner circumference of the outer iron core 200, and the flange 440 protrudes inward along the radial direction towards the inner iron core 100, that is, the flange 440 protrudes from the inner peripheral wall of the outer iron core 200. Along the axial direction, the flange 440 is arranged staggeredly with the inner iron core 100, that is to say, the flange 440 is not within the axial range of the inner iron core 100. For example, the flange 440 is located on one side of the inner iron core 100 along the axial direction, and the flange 440 is located between the inner iron core 100 and the end of the plastic package 400 at the same axial end, or the flange 440 is located at the axial end of the plastic package 400. Correspondingly, the shock absorber 500 is provided with a recess 540, and the recess 540 is arranged corresponding to the position of the flange 440 in the axial direction. The recess 540 is arranged on the outer peripheral wall of the shock absorber 500 and opens towards the outer iron core 200, and the recess 540 can accommodate the flange 440. For example, if the flange 440 is located between the inner iron core 100 and the end of the plastic package 400 at the same axial end, then the recess 540 is also located between the inner iron core 100 and the end of the plastic package 400 at the same axial end; or, if the flange 440 is located at the axial end of the plastic package 400, then the recess 540 is located at the axial end of the shock absorber 500, and one side of the recess 540 in the axial direction is open.

[0047] Therefore, the flange 440 is accommodated in the recess 540, that is, the flange 440 is embedded in the shock absorber 500. On the projection plane perpendicular to the axial direction, the projection of the flange 440 overlaps with the projections of the structures on both sides (or one side) of the recess 540 in the axial direction on the shock absorber 500, and the opposite two wall surfaces of the flange 440 and the structures on both sides (or one side) of the recess 540 in the axial direction on the shock absorber 500 are in contact with each other. Therefore, the flange 440 and the structures on both sides (or one side) of the recess 540 in the axial direction on the shock absorber 500 form a constraint in the axial direction, thereby increasing the axial constraint between the plastic package 400 and the shock absorber 500, realizing an increase in the axial bonding force between the plastic package 400 and the shock absorber 500, and further increasing the axial bonding force between the outer iron core 200 and the inner iron core 100. During the rotation process or under the drop condition of the rotor assembly, relative displacement or separation between the outer iron core 200 and the inner iron core 100 can be avoided, which is beneficial to improving the structural stability of the rotor assembly.

[0048] It can be understood that, under the same acting force, since the deformation amount of the engineering plastic with the same thickness is smaller than that of the elastic damping material, the flange 440 is arranged on the plastic package 400, so that the deformation amount of the flange 440 is relatively small under the stressed state, thereby further enhancing the axial combination of the flange 440 and the damping body 500, enhancing the axial combination of the plastic package 400 and the damping body 500, further increasing the axial bonding force between the plastic package 400 and the damping body 500, and then increasing the bonding force between the outer iron core 200 and the inner iron core 100, and improving the structural stability of the rotor assembly.

[0049] It can be understood that, since the deformation amount of the flange 440 is relatively small under the stressed state, the damping effect of the flange 440 is poor. Therefore, the flange 440 and the inner iron core 100 are arranged in an axially staggered manner in the rotor assembly, that is, in the radial direction, the flange 440 is not in the space between the inner iron core 100 and the outer iron core 200, so as to avoid the flange 440 affecting the damping effect of the damping body 500, and at the same time, the radial thickness of the damping body 500 filled between the inner iron core 100 and the outer iron core 200 is relatively large, effectively ensuring the damping effect.

[0050] Refer to Figure 1 and Figure 2 As shown, it can be understood that the flange 440 is located at the axial end of the plastic package 400, farthest from the inner iron core 100 in the axial direction, thereby effectively ensuring the damping effect. At the same time, since the flange 440 is located at the end of the plastic package 400, it is more convenient for demolding after the plastic package 400 is formed, which is convenient for production.

[0051] Refer to Figure 3 and Figure 4 As shown, it can be understood that in some other embodiments, flanges 440 are arranged at both axial ends of the plastic package 400. Correspondingly, concave portions 540 are arranged on the end faces at both axial ends of the damping body 500, and the flanges 440 at both ends are correspondingly received in the concave portions 540 at both ends. Therefore, the axial constraint between the plastic package 400 and the damping body 500 can be further increased, and the plastic package 400 and the damping body 500 form constraints in both axial directions, realizing an increase in the axial bonding force between the outer iron core 200 and the inner iron core 100, and further improving the structural stability of the rotor assembly.

[0052] It can be understood that in some other embodiments, along the axial direction, the thickness of the first end wall 520 is less than that of the second end wall 530. Therefore, under the same force, the deformation amount of the second end wall 530 is smaller than that of the first end wall 520, and the axial constraint between the second end wall 530 and the outer iron core 200 is better than that between the first end wall 520 and the outer iron core 200. The plastic-sealed body 400 is provided with a flange 440 only at one end along the axial direction, and the flange 440 and the first end wall 520 are located at the same end of the rotor assembly. Correspondingly, the first end wall 520 of the shock-absorbing body 500 is provided with a recess 540 for accommodating the flange 440. Therefore, on the premise that the axial constraint between the second end wall 530 and the outer iron core 200 is good, by adding a flange 440 that forms an axial constraint with the shock-absorbing body 500 at the end where the first end wall 520 is located, the constraint between the plastic-sealed body 400 and the shock-absorbing body 500 at the end where the first end wall 520 is located is increased, which is beneficial to increasing the axial bonding force between the outer iron core 200 and the inner iron core 100 and further improving the structural stability of the rotor assembly.

[0053] Referring to Figure 3 and Figure 4 as shown, it can be understood that the plastic-sealed body 400 further includes at least one connecting strip 410. The connecting strip 410 is arranged axially and abuts against the inner peripheral wall of the outer iron core 200. The connecting strip 410 is located between two adjacent second tooth portions 210, and the connecting strip 410 and the opposite ends of two adjacent magnetic tiles 300 in the circumferential direction are arranged corresponding to each other in the radial direction. In this way, the connecting strip 410 and the wall body of the plastic-sealed body 400 that wraps the outside of the magnetic tile 300 cooperate to clamp the magnetic tile 300 and the outer iron core 200 in the radial direction, which is beneficial to further enhancing the installation stability of the magnetic tile 300. Correspondingly, the shock-absorbing body 500 is provided with a concave cavity 510. The concave cavity 510 is located on the outer peripheral wall of the shock-absorbing body 500 and extends axially. The connecting strip 410 is accommodated in the concave cavity 510. In this way, the circumferential bonding force between the shock-absorbing body 500 and the plastic-sealed body 400 can be further increased.

[0054] Referring to Figures 3 to 5As shown, it can be understood that in any of the above embodiments, the flange 440 is connected to the connecting bar 410. Specifically, in this embodiment, the flange 440 is located at the axial end of the connecting bar 410 and protrudes from the side wall of the connecting bar 410, and the flange 440 protrudes inward from the iron core 100 in the radial direction. Correspondingly, the recess 540 is provided on the side wall of the concave cavity 510 and is located at the axial end of the concave cavity 510. The opening of the recess 540 faces outward from the iron core 200, and one end of the recess 540 in the axial direction is open. The flange 440 is received in the recess 540, so as to increase the axial binding force between the outer iron core 200 and the inner iron core 100, and further improve the structural stability of the rotor assembly. Since the flange 440 is connected to the connecting bar 410, the radial thickness of the connecting bar 410 is relatively large, which is beneficial to improving the connection stability of the flange 440.

[0055] Referring to Figure 3 and Figure 4 As shown, it can be understood that the number of the connecting bars 410 is multiple. In this embodiment, the number of the connecting bars 410 is four, and the four connecting bars 410 and the four second tooth portions 210 are arranged alternately and spaced apart in the circumferential direction. A flange 440 can be connected to any one end of each connecting bar 410, or one flange 440 is respectively connected to two adjacent connecting bars 410, or one flange 440 is respectively connected to two oppositely arranged connecting bars 410, or one flange 440 is respectively connected to three connecting bars 410. Correspondingly, the concave portions 540 corresponding to the positions of the flanges 440 are provided on the side wall of the concave cavity 510 of the shock absorber 500, which will not be elaborated here. Therefore, the axial constraint between the plastic package 400 and the shock absorber 500 can be further increased, the axial binding force between the outer iron core 200 and the inner iron core 100 can be increased, which is beneficial to improving the structural stability of the rotor assembly.

[0056] Referring to Figure 3 and Figure 4 As shown, it can be understood that in some other embodiments, flanges 440 are respectively connected to both axial ends of each connecting bar 410, or only both axial ends of some connecting bars 410 are connected with flanges 440, or both axial ends of some connecting bars 410 are respectively connected with flanges 440, and one axial end of the other part of the connecting bars 410 is connected with a flange 440, etc. Therefore, the axial constraint between the plastic package 400 and the shock absorber 500 can be further increased, the axial binding force between the outer iron core 200 and the inner iron core 100 can be increased, which is beneficial to improving the structural stability of the rotor assembly.

[0057] It can be understood that the plastic-sealed body 400 is also provided with a material passing hole 450. Specifically, the material passing hole 450 is formed in the flange 440 and axially penetrates through the two end faces of the flange 440. Correspondingly, the shock-absorbing body 500 includes a connecting column 550. One end of the connecting column 550 in the axial direction is connected to the bottom wall of the recess 540, and the other end extends axially. The connecting column 550 is received in the material passing hole 450. Therefore, by providing the connecting column 550, the shock-absorbing body 500 is formed with a structure similar to a hook portion, so that constraints are formed between the connecting column 550 and the plastic-sealed body 400 both radially and circumferentially. Thus, the radial constraint force and circumferential constraint force between the shock-absorbing body 500 and the plastic-sealed body 400 can be increased. At the same time, the contact area between the plastic-sealed body 400 and the shock-absorbing body 500 is increased, and to a certain extent, the axial bonding force between the plastic-sealed body 400 and the shock-absorbing body 500 is also increased, thereby enhancing the bonding between the outer iron core 200 and the inner iron core 100, which is beneficial to further improving the structural stability of the rotor assembly.

[0058] Referring to Figures 6 to 9 As shown, it can be understood that in some other embodiments, the plastic-sealed body 400 is provided with a material passing hole 450. The material passing hole 450 is formed in the connecting bar 410 and axially arranged. The material passing hole 450 is a blind hole structure in the axial direction. The material passing hole 450 extends axially from the axial end face of the plastic-sealed body 400 and exceeds the flange 440 located at the same end, and the part of the material passing hole 450 exceeding the flange 440 radially penetrates the side wall of the connecting bar 410 facing the inner iron core 100. Similarly, the shock-absorbing body 500 includes a connecting column 550. One end of the connecting column 550 in the axial direction is connected to the side wall of the concave cavity 510, and the other end extends axially and protrudes from the bottom wall of the recess 540. The connecting column 550 is received in the material passing hole 450. Similarly, the shock-absorbing body 500 is formed with a structure similar to a hook portion, which will not be elaborated here. Therefore, on the one hand, the radial thickness of the connecting column 550 can be increased, improving the structural stability of the connecting column 550, which is beneficial to enhancing the bonding between the plastic-sealed body 400 and the shock-absorbing body 500; on the other hand, constraints are formed between the connecting column 550 and the connecting bar 410 in the axial direction. Of course, constraints are also formed both radially and circumferentially, thereby further increasing the constraints between the plastic-sealed body 400 and the shock-absorbing body 500, increasing the axial bonding force between the plastic-sealed body 400 and the shock-absorbing body 500, thereby enhancing the bonding between the outer iron core 200 and the inner iron core 100, which is beneficial to further improving the structural stability of the rotor assembly.

[0059] It can be understood that, in some other embodiments, the flange 440 can be connected to the inner peripheral wall of the plastic package 400 instead of the connecting bar 410, that is, the flange 440 is located between the circumferentially adjacent connecting bar 410 and the second tooth portion 210. The structure of the flange 440 can refer to the above description and will not be elaborated here. Therefore, the combination between the plastic package 400 and the shock absorber 500 can be enhanced, the axial bonding force between the outer iron core 200 and the inner iron core 100 can be increased, and the structural stability of the rotor assembly can be improved.

[0060] The motor according to the second aspect embodiment of the present utility model includes the rotor assembly according to the first aspect embodiment of the present utility model.

[0061] Since the motor adopts all the technical solutions of the rotor assembly of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment.

[0062] The household appliance according to the third aspect embodiment of the present utility model includes the motor according to the second aspect embodiment of the present utility model. The household appliance can be an air conditioner, a washing machine, a refrigerator, etc., which will not be elaborated here.

[0063] Since the household appliance adopts all the technical solutions of the motor of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment.

[0064] The embodiments of the present utility model have been described in detail above with reference to the drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the purpose of the present utility model within the knowledge scope of those of ordinary skill in the art.

Claims

1. Rotor assembly, characterized in that, include: Inner iron core; An outer iron core is arranged along the outer periphery of the inner iron core; A plurality of magnetic tiles are mounted on the outer peripheral wall of the outer iron core and are arranged at intervals along the circumference of the outer iron core; A plastic package body, which is plastic-coated on the magnetic tile and the outer iron core, wherein the plastic package body comprises a flange, the flange protrudes from the inner peripheral wall of the outer iron core toward the inner iron core, and the flange and the inner iron core are staggered in the axial direction of the rotor assembly; The damper is filled between the inner core and the outer core. The damper is provided with a recessed portion, the opening of the recessed portion faces the outer core, and the flange is accommodated in the recessed portion.

2. The rotor assembly according to claim 1, characterized in that: The flange is located at the end of the plastic sealing body along the axial direction, and the recess is arranged on the end surface of the shock absorbing body along the axial direction.

3. The rotor assembly according to claim 2, wherein: The two ends of the plastic sealing body along the axial direction are provided with the flanges, and the two end surfaces of the shock absorbing body along the axial direction are provided with the recesses, and the flanges at the two ends are correspondingly accommodated in the recesses at the two ends.

4. The rotor assembly according to claim 2, characterized in that: The shock absorber includes a first end wall and a second end wall, the first end wall and the second end wall are located at two ends of the shock absorber along the axial direction and are respectively coated with partial end surfaces of the outer iron core along the axial direction. Along the axial direction, the thickness of the first end wall is less than the thickness of the second end wall, and the first end wall and the flange are located at the same end of the rotor assembly along the axial direction.

5. The rotor assembly according to any one of claims 1 to 4, characterized in that: The plastic package body also includes at least one connecting strip, which is arranged along the axial direction and abuts against the inner circumferential wall of the outer iron core. The flange is connected to the connecting strip, and the flange protrudes from the side wall of the connecting strip. The shock absorber is provided with a concave cavity for accommodating the connecting strip, and the concave portion is provided on the side wall of the concave cavity.

6. The rotor assembly according to claim 5, wherein: There are multiple connecting strips, which are arranged at intervals along the circumferential direction, and each connecting strip is connected to the flange.

7. The rotor assembly according to claim 5, characterized in that: The plastic sealing body is provided with a feeding hole, which is formed on the flange and passes through two end surfaces of the flange along the axial direction. The shock absorbing body includes a connecting column, which is accommodated in the feeding hole.

8. The rotor assembly according to claim 5, wherein: The plastic package body is provided with a feeding hole, which is formed on the connecting strip and arranged along the axial direction. The feeding hole passes through a part of the side wall of the connecting strip facing the inner core. The shock absorber includes a connecting column, which is accommodated in the feeding hole.

9. Motor, characterized in that, A rotor assembly comprising any one of claims 1 to 8.

10. A household appliance, characterized in that, A motor comprising the motor described in claim 9.

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