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 wraps 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 is far away from the two ends of the plastic package body 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 of 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.

Description

Technical Field

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

[0002] For a surface-mounted rotor motor, in order to ensure the installation stability of magnetic tiles and improve the motor noise, in the related art, engineering plastic is coated on the magnetic tiles and the outer iron core of the rotor, so that the magnetic tiles are stably installed on the outer iron core, and an elastic damping material is filled between the outer iron core and the inner iron core of the rotor to reduce vibration, so as to achieve the purpose of improving the motor noise. However, in the existing motor structure, due to the large difference in shrinkage rate between the engineering plastic and the elastic damping material, gaps will be generated at the joint of the engineering plastic and the elastic damping material, resulting in a small bonding force between the outer iron core and the inner iron core, and relative displacement is likely to occur between the outer iron core and the inner iron core. Especially under the dropping condition, the outer iron core and the inner iron core will be separated. At the same time, on the premise that the deformation of the elastic damping material is larger than that of the engineering plastic under the same thickness, how to form an effective axial constraint between the engineering plastic and the elastic damping material and improve the bonding force between the engineering plastic and the elastic damping material to improve the bonding force between the outer iron core and the inner iron core is still a problem to be solved at present. 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 purpose, the utility model provides a rotor assembly, which can increase the axial constraint between the plastic sealing body and the damping body and enhance the combination of the plastic sealing body and the damping body, thereby increasing the bonding force between the outer iron core and the inner iron core.

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

[0005] The rotor assembly according to the first aspect embodiment of the utility model 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 circumferential direction of the outer iron core; a plastic sealing body coated on the magnetic tiles and the outer iron core, the plastic sealing body includes a flange protruding from the inner peripheral wall of the outer iron core towards the inner iron core, and the two ends of the flange far away from the plastic sealing body along the axial direction of the rotor assembly; a damping body filled between the inner iron core and the outer iron core, the damping body is provided with a concave portion, the opening of the concave portion faces the outer iron core, and the flange is received in the concave portion.

[0006] The rotor assembly according to the first aspect embodiment of the present utility model has at least the following beneficial effects: Since the plastic encapsulation body plastically encapsulates the magnetic tile and the outer iron core, and the damping body 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 damping body is combined with the outer iron core and the inner iron core. By providing a flange protruding towards the inner iron core on the plastic encapsulation body and a recess capable of accommodating the flange on the damping body, the axial constraint between the plastic encapsulation body and the damping body is increased. At the same time, since the flange is a part of the plastic encapsulation body, the amount of deformation is small, and the two ends of the flange away from the plastic encapsulation body along the axial direction, correspondingly, the two ends of the recess away from the damping body along the axial direction, so that the flange and the damping body form constraints in both axial directions, with a simple structure, which is beneficial to enhancing the combination of the damping body 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 process or dropping condition of the rotor assembly, which is beneficial to improving the structural stability of the rotor assembly.

[0007] According to some embodiments of the present utility model, the plastic encapsulation body further includes at least one connecting strip, the connecting strip is arranged along the axial direction and abuts against the inner peripheral wall of the outer iron core, the flange is connected to the connecting strip, the flange protrudes from the side wall of the connecting strip, the damping body is provided with a concave cavity for accommodating the connecting strip, and the recess is arranged on the side wall of the concave cavity.

[0008] According to some embodiments of the present utility model, the flange is located at the middle position of the connecting strip along the axial direction.

[0009] According to some embodiments of the present utility model, the number of the connecting strips is multiple, the multiple connecting strips are arranged at intervals along the circumferential direction, and each connecting strip is connected with the flange.

[0010] According to some embodiments of the present utility model, the flange is located on the side of the connecting strip closer to the inner iron core along the radial direction of the outer iron core.

[0011] According to some embodiments of the present utility model, each connecting strip is connected with two flanges, and the two flanges are respectively located on both sides of the connecting strip along the circumferential direction.

[0012] According to some embodiments of the present utility model, the flange is arranged around the connecting strip, and the flange extends from one side of the connecting strip along the circumferential direction to the other side.

[0013] According to some embodiments of the present utility model, the connecting strip includes a first section and a second section, the first section and the second section are respectively located on both sides of the flange along the axial direction, the first section and the second section both deviate from the middle position of the flange along the circumferential direction, and the first section and the second section are arranged staggeredly in the circumferential direction.

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

[0015] The motor according to the second - aspect embodiment of the present utility model has at least the following beneficial effects: Since the above - mentioned rotor assembly is adopted in the motor, with the plastic - sealed body covering the magnetic tile and the outer iron core, and the shock - absorbing body filled between the inner iron core and the outer iron core, the plastic - sealed body is combined with the outer iron core and the magnetic tile, and the shock - absorbing body is combined with the outer iron core and the inner iron core. By providing a flange protruding towards the inner iron core on the plastic - sealed body and a recess capable of accommodating the flange on the shock - absorbing body, the axial constraint between the plastic - sealed body and the shock - absorbing body is increased. At the same time, since the flange is part of the plastic - sealed body, the deformation amount is small, and the two ends of the flange away from the plastic - sealed body along the axial direction, correspondingly, the two ends of the recess away from the shock - absorbing body along the axial direction, so that the flange and the shock - absorbing body form constraints in both axial directions. The structure is simple, which is beneficial to enhancing the combination of the shock - absorbing body and the plastic - sealed 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 dropping condition, the relative displacement or separation between the outer iron core and the inner iron core is avoided, which is beneficial to improving the structural stability of the rotor assembly.

[0016] The household appliance according to the third - aspect embodiment of the present utility model includes the motor of the second - aspect embodiment of the present utility model.

[0017] The household appliance according to the third - aspect embodiment of the present utility model has at least the following beneficial effects: Since the above - mentioned motor is adopted in the household appliance, with the plastic - sealed body covering the magnetic tile and the outer iron core, and the shock - absorbing body filled between the inner iron core and the outer iron core, the plastic - sealed body is combined with the outer iron core and the magnetic tile, and the shock - absorbing body is combined with the outer iron core and the inner iron core. By providing a flange protruding towards the inner iron core on the plastic - sealed body and a recess capable of accommodating the flange on the shock - absorbing body, the axial constraint between the plastic - sealed body and the shock - absorbing body is increased. At the same time, since the flange is part of the plastic - sealed body, the deformation amount is small, and the two ends of the flange away from the plastic - sealed body along the axial direction, correspondingly, the two ends of the recess away from the shock - absorbing body along the axial direction, so that the flange and the shock - absorbing body form constraints in both axial directions. The structure is simple, which is beneficial to enhancing the combination of the shock - absorbing body and the plastic - sealed 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 dropping condition, the relative displacement or separation between the outer iron core and the inner iron core is avoided, which is beneficial to improving the structural stability of the rotor assembly.

[0018] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

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

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

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

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

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

[0025] Figure 6 It is a schematic structural view of the plastic-sealed body in another embodiment of the present utility model;

[0026] Figure 7 It is a schematic structural view of the shock-absorbing body in another embodiment of the present utility model;

[0027] Figure 8 It is a schematic structural view of the plastic-sealed body in still another embodiment of the present utility model;

[0028] Figure 9 It is a schematic structural view of the shock-absorbing body in still another embodiment of the present utility model;

[0029] Figure 10 It is a schematic structural view of the plastic-sealed body in yet another embodiment of the present utility model;

[0030] Figure 11 It is a schematic structural view of the shock-absorbing body in yet another embodiment of the present utility model.

[0031] Inner iron core 100; First tooth part 110;

[0032] Outer iron core 200; Second tooth part 210;

[0033] Magnetic tile 300;

[0034] Plastic-sealed body 400; Connecting strip 410; First section 411; Second section 412; First end wall 420; Second end wall 430; Flange 440;

[0035] Shock-absorbing body 500; Concave cavity 510; Third end wall 520; Fourth end wall 530; Concave part 540. Detailed implementation manners

[0036] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where 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 accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0037] In the description of the present utility model, it should be understood that with respect to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is 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 therefore should not be construed as limiting the present utility model.

[0038] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood not to include the present number, and above, below, within, etc. are understood to include the present number. If the first and second are described, it is only for the purpose of distinguishing technical features and should not be understood 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.

[0039] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, assembling, mating, 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 utility model in combination with the specific content of the technical solution.

[0040] Refer to Figures 1 to 11 As shown, an embodiment of the first aspect of the present utility model provides a rotor assembly, which is applied to the motor of household appliances, and the household appliances can be air conditioners, washing machines, refrigerators, etc.

[0041] 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 axial direction, circumferential direction, and radial direction described below 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.

[0042] 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 circumference 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.

[0043] 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 are positioned on the outer peripheral wall of the outer iron core 200 through a mold.

[0044] Referring to Figure 3 and Figure 5As shown, it can be understood that the plastic-sealed 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-sealed body 400, and the plastic-sealed 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-sealed body 400 includes a first end wall 420 and a second end wall 430. The first end wall 420 and the second end wall 430 are respectively located at both axial ends of the plastic-sealed body 400. The first end wall 420 and the second end wall 430 respectively cover the end faces of the outer iron core 200 located at both axial ends, and both the first end wall 420 and the second 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 of the end face, so as to form an axial constraint between the plastic-sealed body 400 and the outer iron core 200, combine the plastic-sealed body 400 with the outer iron core 200, and ensure the installation stability of the magnetic tiles 300.

[0045] 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 third end wall 520 and a fourth end wall 530, which are respectively located at the two ends of the shock absorber 500 in the axial direction, and the third end wall 520 and the fourth end wall 530 respectively cover the end faces of the inner core 100 at the two ends in the axial direction, and the third end wall 520 and the fourth end wall 530 also cover the other end faces of the outer core 200 at the two ends in the axial direction. 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.

[0046] 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.

[0047] For this purpose, refer to Figures 3 to 5As shown, it can be understood that the plastic-sealed body 400 includes a flange 440. The flange 440 is located on the inner circumference of the outer iron core 200, and the flange 440 protrudes radially inward toward the inner iron core 100, that is, the flange 440 protrudes from the inner peripheral wall of the outer iron core 200. Axially, the flange 440 is away from both axial ends of the plastic-sealed body 400. That is to say, the flange 440 is located between the two axial ends of the plastic-sealed body 400. For example, the flange 440 is located at the axial middle position of the plastic-sealed body 400, or the flange 440 is located between the end of the plastic-sealed body 400 and the axial middle position of the plastic-sealed body 400. Correspondingly, the shock-absorbing body 500 is provided with a recess 540. The recess 540 is provided on the outer peripheral wall of the shock-absorbing body 500, and the opening of the recess 540 faces the outer iron core 200. The recess 540 and the flange 440 are arranged corresponding to each other axially, and the recess 540 can accommodate the flange 440. Therefore, the flange 440 is received in the recess 540, that is, the flange 440 is embedded in the shock-absorbing body 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 axial sides of the recess 540 on the shock-absorbing body 500, and the two opposite wall surfaces of the flange 440 and the structures on both axial sides of the recess 540 on the shock-absorbing body 500 are in contact with each other. Therefore, the flange 440 and the structures on both axial sides of the recess 540 on the shock-absorbing body 500 form a constraint axially, that is, a constraint is formed in both axial directions, thereby increasing the axial constraint between the plastic-sealed body 400 and the shock-absorbing body 500, realizing an increase in the axial bonding force between the plastic-sealed body 400 and the shock-absorbing body 500, and further increasing the axial bonding force between the outer iron core 200 and the inner iron core 100. During the rotation of the rotor assembly or under the drop condition, 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] Referring to Figures 3 to 5 As shown, it can be understood that since the flange 440 is located at the axial middle position of the plastic-sealed body 400, or the flange 440 is located between the end and the middle position of the plastic-sealed body 400, that is, the flange 440 is away from the axial ends of the plastic-sealed body 400, and the recess 540 and the flange 440 are corresponding to each other axially, that is, the recess 540 is away from the axial ends of the shock-absorbing body 500. Therefore, the structures on both axial sides of the recess 540 on the shock-absorbing body 500 have a larger thickness axially, and the axial deformation amount of this structure under the stress state is smaller. Therefore, it is beneficial to enhance the axial bonding between the flange 440 and the shock-absorbing body 500, that is, to enhance the axial bonding between the plastic-sealed body 400 and the shock-absorbing body 500, thereby further increasing the axial bonding force between the plastic-sealed body 400 and the shock-absorbing body 500, and further 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 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 provided 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.

[0050] Referring to Figure 3 and Figure 4 as shown, it can be understood that the plastic package 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 ends of the connecting strip 410 corresponding to the opposite ends of two adjacent magnetic tiles 300 in the circumferential direction are arranged radially. In this way, the connecting strip 410 and the wall body of the plastic package 400 wrapping 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 damping body 500 is provided with a concave cavity 510. The concave cavity 510 is located on the outer peripheral wall of the damping body 500 and extends axially. The connecting strip 410 is received in the concave cavity 510. In this way, the circumferential bonding force between the damping body 500 and the plastic package 400 can be further increased.

[0051] Referring to Figures 3 to 5 as shown, it can be understood that the flange 440 is connected to the connecting strip 410. Specifically, the flange 440 is located between the two axial ends of the connecting strip 410. For example, the flange 440 is located at the middle position of the connecting strip 410 in the axial direction, and the flange 440 protrudes from the side wall of the connecting strip 410, so that the flange 440 protrudes inwardly from the iron core 100. Correspondingly, the concave portion 540 is provided on the side wall of the concave cavity 510, and the opening of the concave portion 540 faces the outer iron core 200. Similarly, the flange 440 is received in the concave portion 540 to increase the axial bonding force between the outer iron core 200 and the inner iron core 100 and improve the structural stability of the rotor assembly. Since the flange 440 is connected to the connecting strip 410 and the radial thickness of the connecting strip 410 is relatively large, it is beneficial to improve the connection stability of the flange 440.

[0052] Referring to Figure 3As shown, it can be understood that the number of connecting bars 410 is multiple. In this embodiment, the number of connecting bars 410 is four, and the four connecting bars 410 and the four second tooth portions 210 are arranged alternately and at intervals in the circumferential direction. Each connecting bar 410 can be connected with a flange 440, or two adjacent connecting bars 410 are respectively connected with a flange 440, or two oppositely arranged connecting bars 410 are respectively connected with a flange 440, or three connecting bars 410 are respectively connected with a flange 440. Correspondingly, the side wall of the concave cavity 510 of the shock absorber 500 is provided with a recess 540 corresponding to the position of the flange 440, 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 bonding 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.

[0053] It can be understood that the flange 440 is located at the middle position of the connecting bar 410 in the axial direction. Correspondingly, the recess 540 is located at the middle position of the shock absorber 500 in the axial direction, so that the structures on both sides of the shock absorber 500 along the axial direction of the recess 540 have equal thicknesses in the axial direction. Therefore, the bonding forces of the flange 440 and the shock absorber 500 in both axial directions are relatively large, which is beneficial to further enhancing the bonding between the plastic package 400 and the shock absorber 500, increasing the axial bonding force between the outer iron core 200 and the inner iron core 100, and improving the structural stability of the rotor assembly.

[0054] Referring to Figures 3 to 5 As shown, it can be understood that the flange 440 is located on the side of the connecting bar 410 close to the inner iron core 100 in the radial direction, that is to say, the flange 440 protrudes from the wall surface of the connecting bar 410 facing the inner iron core 100 in the radial direction. The shock absorber 500 is provided with a recess 540 corresponding to the flange 440, which will not be elaborated here. Therefore, the bonding between the plastic package 400 and the shock absorber 500 can also 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. And on the premise of meeting the bonding strength between the plastic package 400 and the shock absorber 500, the volume of the flange 440 can be reduced, the amount of engineering plastic used can be reduced, the cost can be lowered, and the demolding can be facilitated.

[0055] Referring to Figure 6 and Figure 7As shown, it can be understood that in some other embodiments, each connecting bar 410 is connected with two flanges 440. The two flanges 440 are respectively located on both circumferential sides of the connecting bar 410. That is to say, the two flanges 440 respectively protrude from the circumferential side walls of the connecting bar 410. Correspondingly, the two side walls along the circumference of the concave cavity 510 are respectively arranged in the concave portions 540 corresponding to the two flanges 440. The two flanges 440 are correspondingly received in the two concave portions 540. Therefore, the bonding points between the plastic-sealed body 400 and the shock-absorbing body 500 can be increased, the bonding between the plastic-sealed body 400 and the shock-absorbing body 500 can be further 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.

[0056] Referring to Figure 8 and Figure 9 As shown, it can be understood that in some other embodiments, the flange 440 is arranged around the connecting bar 410. Specifically, the flange 440 extends from one circumferential side of the connecting bar 410 to the other side. That is to say, the flange 440 protrudes from the wall surface of the connecting bar 410 facing the inner iron core 100 in the radial direction and protrudes from the circumferential side walls of the connecting bar 410. Therefore, the area of the flange 440 can be increased, so as to increase the bonding area between the flange 440 and the shock-absorbing body 500, enhance the bonding between the plastic-sealed body 400 and the shock-absorbing body 500, increase the axial bonding force between the outer iron core 200 and the inner iron core 100, and improve the structural stability of the rotor assembly.

[0057] Referring to Figure 10 and Figure 11 As shown, it can be understood that in some other embodiments, the connecting bar 410 includes a first section 411 and a second section 412. Specifically, the first section 411 and the second section 412 are arranged axially, and the first section 411 and the second section 412 are respectively located on both axial sides of the flange 440. The first section 411 and the second section 412 deviate from the middle position of the flange 440 along the circumference of the rotor assembly, and the first section 411 and the second section 412 are arranged staggeredly in the circumferential direction of the rotor assembly. That is to say, the first section 411 is close to one end of the flange 440 along the circumference of the rotor assembly, and the second section 412 is close to the other end of the flange 440 along the circumference of the rotor assembly. Therefore, most of the wall surfaces on both axial sides of the flange 440 are respectively concentrated on one side of the connecting bar 410 along the circumference of the rotor assembly, and the area of the concentrated area is relatively large, which is beneficial to enhancing the bonding between the flange 440 and the shock-absorbing body 500, thereby enhancing the bonding between the plastic-sealed body 400 and the shock-absorbing body 500, increasing the axial bonding force between the outer iron core 200 and the inner iron core 100, and improving the structural stability of the rotor assembly.

[0058] 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.

[0059] The motor according to the second aspect embodiment of the present invention includes the rotor assembly according to the first aspect embodiment of the present invention.

[0060] 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.

[0061] The household appliance according to the third aspect embodiment of the present invention includes the motor according to the second aspect embodiment of the present invention. The household appliance can be an air conditioner, a washing machine, a refrigerator, etc., which will not be elaborated here.

[0062] 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.

[0063] The embodiments of the present invention have been described in detail above with reference to the drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. Rotor assembly, characterized in that, Comprising: Inner iron core; Outer iron core, arranged along the outer periphery of the inner iron core; A plurality of magnetic tiles, mounted on the outer peripheral wall of the outer iron core and arranged at intervals along the circumferential direction of the outer iron core; Plastic encapsulation body, encapsulating the magnetic tiles and the outer iron core, the plastic encapsulation body includes a flange, the flange protrudes towards the inner iron core from the inner peripheral wall of the outer iron core, and the flange is away from both ends of the plastic encapsulation body along the axial direction of the rotor assembly; 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 received in the recess.

2. The rotor assembly according to claim 1, wherein: The plastic encapsulation body further includes at least one connecting strip, the connecting strip is arranged along the axial direction and abuts against the inner peripheral wall of the outer iron core, the flange is connected to the connecting strip, the flange protrudes from the side wall of the connecting strip, the shock absorber is provided with a concave cavity for receiving the connecting strip, and the recess is arranged on the side wall of the concave cavity.

3. The rotor assembly according to claim 2, characterized in that: The flange is located at the middle position of the connecting strip along the axial direction.

4. The rotor assembly according to claim 2, characterized in that: The number of the connecting strips is multiple, the multiple connecting strips are arranged at intervals along the circumferential direction, and each connecting strip is connected with the flange.

5. The rotor assembly according to any one of claims 2 to 4, characterized in that: The flange is located on the side of the connecting strip along the radial direction of the outer iron core close to the inner iron core.

6. The rotor assembly according to any one of claims 2 to 4, characterized in that: Each connecting strip is connected with two flanges, and the two flanges are respectively located on both sides of the connecting strip along the circumferential direction.

7. The rotor assembly according to any one of claims 2 to 4, characterized in that: The flange surrounds the connecting strip, and the flange extends from one side of the connecting strip along the circumferential direction to the other side.

8. The rotor assembly according to claim 7, characterized in that: The connecting strip includes a first section and a second section, the first section and the second section are respectively located on both sides of the flange along the axial direction, the first section and the second section both deviate from the middle position of the flange along the circumferential direction, and the first section and the second section are arranged staggeredly in the circumferential direction.

9. Electric motor, characterized in that, Comprising the rotor assembly according to any one of claims 1 to 8.

10. A household appliance, characterized in that, Comprising the motor according to claim 9.

Images