Rotor, electric machine and household appliance

Abstract

The utility model discloses a rotor, motor and household appliance relates to motor technical field, wherein, the rotor includes main body, a plurality of magnetic tile and plastic layer, a plurality of the magnetic tile install in the main body, and the plurality of magnetic tile includes main magnetic tile and auxiliary magnetic tile, the magnetic pole of main magnetic tile is along the radial distribution of rotor, the magnetic pole of auxiliary magnetic tile is along the circumferential distribution of rotor, and the auxiliary magnetic tile sets up between two main magnetic tile of adjacent, the plastic layer is connected the main body with the plurality of magnetic tile setting, and the plastic layer at least partial coating the plurality of magnetic tile setting, in the plurality of magnetic tile with the combination surface of plastic layer, at least one the combination surface of magnetic tile is provided with recess, or the combination surface of two adjacent magnetic tile is high difference setting to form recess, and the plastic material of plastic layer inserts to recess, the utility model aims at improving the plastic combination force of rotor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a rotor, a motor, and a household appliance. Background Technology

[0002] Permanent magnet synchronous motors have high power density and torque density, and are widely used in the electrical appliance field. To meet the current demands of electrical appliances, motors are often designed with high power density in mind. In some designs, the gaps between rotor magnets are small. Compared to conventional magnet designs, relying solely on gap material flow cannot meet the rotor coating bonding force requirements, resulting in rotor coating bonding force issues. Therefore, it is necessary to provide a matching design scheme to improve the rotor coating bonding force. Utility Model Content

[0003] The main purpose of this utility model is to propose a rotor, motor, and household appliance that aims to improve the bonding strength of the rotor's plastic coating.

[0004] To achieve the above objectives, this utility model proposes a rotor, wherein the rotor comprises: main body; Multiple magnetic tiles are installed on the main body, and the multiple magnetic tiles include main magnetic tiles and auxiliary magnetic tiles. The magnetic poles of the main magnetic tiles are distributed radially along the rotor, and the magnetic poles of the auxiliary magnetic tiles are distributed circumferentially along the rotor. The auxiliary magnetic tiles are disposed between two adjacent main magnetic tiles; and... A plastic coating layer connects the main body and the plurality of magnetic tiles, and the plastic coating layer at least partially covers the plurality of magnetic tiles; Wherein, at least one of the magnetic tiles has a groove at the joint surface of the plurality of magnetic tiles and the plastic coating layer, or the joint surfaces of two adjacent magnetic tiles are arranged with a height difference to form a groove, and the plastic coating material of the plastic coating layer is embedded in the groove.

[0005] In one embodiment, the magnetic tile has two first end faces located axially on the rotor, a first side face facing the main body, a second side face facing away from the main body, and two third side faces opposite to the adjacent magnetic tile. The mating surfaces of the magnetic tile include the first end face and / or the second side face.

[0006] In one embodiment, the mating surface includes at least one first end face; The groove is provided on the first end face.

[0007] In one embodiment, the groove extends through at least one of the two third sides and the second side.

[0008] In one embodiment, the groove includes a first groove disposed on the main magnetic tile, and the first groove extends through the second side surface of the main magnetic tile; and / or, The groove includes a second groove disposed on the auxiliary magnetic tile, and the second groove is disposed through the two third sides of the auxiliary magnetic tile.

[0009] In one embodiment, the depth of the groove in the axial direction of the rotor is L, then 0.3mm≤L≤5mm.

[0010] In one embodiment, the mating surface includes the second side surface; In the radial direction of the rotor, in adjacent main magnetic tiles and auxiliary magnetic tiles, the second side of the main magnetic tile is positioned to protrude from the second side of the auxiliary magnetic tile to define the groove.

[0011] In one embodiment, the auxiliary magnetic tile is smaller in size in the radial direction of the rotor than the main magnetic tile, such that the auxiliary magnetic tile is set at a height difference with the main magnetic tiles on both sides to form the groove.

[0012] In one embodiment, the difference in size between the main magnetic tile and the auxiliary magnetic tile in the radial direction of the rotor is A, and the size of the main magnetic tile in the radial direction of the rotor is B, then 0.3mm≤A≤0.4B.

[0013] In one embodiment, the magnetic tile has a width in the circumferential direction of the rotor, and at least a portion of the auxiliary magnetic tile has a narrowing width in the radial direction of the rotor.

[0014] In one embodiment, the width of the auxiliary magnetic tile gradually narrows in the direction of approaching or moving away from the main body.

[0015] In one embodiment, the maximum difference in width of the auxiliary magnetic tile is not less than 0.7 mm.

[0016] In one embodiment, the difference between the minimum and / or maximum width of the auxiliary magnetic tile and the dimension of the auxiliary magnetic tile in the radial direction of the rotor is not less than 0.7 mm.

[0017] In one embodiment, the main magnet has a second side facing away from the main body, the second side being arranged in a multi-arc configuration such that, in the circumferential direction of the rotor, the size of the main magnet in the radial direction of the rotor gradually decreases from its center to its sides.

[0018] In one embodiment, the multiple arc segments are arranged symmetrically.

[0019] This utility model also proposes an electric motor, wherein the electric motor comprises: Motor housing; Stator, fixed to the motor housing; and, A rotor is rotatably mounted on the motor housing. The rotor includes a main body, multiple magnetic tiles, and a plastic coating layer. The multiple magnetic tiles are mounted on the main body, and the multiple magnetic tiles include main magnetic tiles and auxiliary magnetic tiles. The magnetic poles of the main magnetic tiles are distributed radially along the rotor, and the magnetic poles of the auxiliary magnetic tiles are distributed circumferentially along the rotor. The auxiliary magnetic tiles are disposed between two adjacent main magnetic tiles. The plastic coating layer connects the main body and the multiple magnetic tiles, and the plastic coating layer at least partially covers the multiple magnetic tiles. At the joint surface between the multiple magnetic tiles and the plastic coating layer, at least one joint surface of the magnetic tile is provided with a groove, or the joint surfaces of two adjacent magnetic tiles are provided with a height difference to form a groove, and the plastic coating material of the plastic coating layer is embedded in the groove.

[0020] This utility model also proposes a household appliance, wherein the household appliance includes a motor, the motor includes a motor housing, a stator and a rotor, the stator is fixedly disposed in the motor housing; the rotor is rotatably disposed in the motor housing, the rotor includes a main body, a plurality of magnetic tiles and a plastic coating layer, the plurality of magnetic tiles are installed in the main body, and the plurality of magnetic tiles include main magnetic tiles and auxiliary magnetic tiles, the magnetic poles of the main magnetic tiles are distributed radially along the rotor, the magnetic poles of the auxiliary magnetic tiles are distributed circumferentially along the rotor, and the auxiliary magnetic tiles are disposed between two adjacent main magnetic tiles; the plastic coating layer connects the main body and the plurality of magnetic tiles, and the plastic coating layer at least partially covers the plurality of magnetic tiles; wherein, at the joint surface of the plurality of magnetic tiles and the plastic coating layer, at least one joint surface of the magnetic tile is provided with a groove, or the joint surfaces of two adjacent magnetic tiles are provided with a height difference to form a groove, and the plastic coating material of the plastic coating layer is embedded in the groove.

[0021] In the technical solution of this utility model, the rotor includes a main body supporting multiple magnetic tiles. The plastic coating layer connects the main body and the multiple magnetic tiles to provide a plastic bonding force, thereby fixing the multiple magnetic tiles to the main body. Specifically, the magnetic tiles include main magnetic tiles and auxiliary magnetic tiles. The magnetic poles of the main magnetic tiles are distributed radially along the rotor, providing the main magnetic field of the rotor. The magnetic poles of the auxiliary magnetic tiles are distributed circumferentially along the rotor, and the auxiliary magnetic tiles are disposed between two adjacent main magnetic tiles to guide the magnetic field of the main magnetic tiles toward the stator. Directional focusing increases magnetic density and thus motor performance. In this configuration, an auxiliary magnetic tile is positioned between the two main magnetic tiles, and the gap between the main and auxiliary magnetic tiles is small. This makes it difficult for the coating material to flow into the gap, reducing the coating bonding strength and posing a risk of the magnetic tile detaching from the main body during the coating process. Therefore, this application provides a groove structure at the interface between the magnetic tile and the coating layer to guide the coating material into the groove, thereby improving the coating bonding strength and meeting functional requirements. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A three-dimensional structural schematic diagram of the first embodiment of the rotor provided by this utility model; Figure 2 for Figure 1 A three-dimensional structural diagram of the middle section; Figure 3 for Figure 2 A three-dimensional structural diagram of the middle section; Figure 4 for Figure 2 A schematic diagram of the planar structure of the middle section; Figure 5 for Figure 1 A three-dimensional structural diagram of the main magnetic tile; Figure 6 for Figure 5 A schematic diagram of the planar structure of the second side of the main magnetic tile; Figure 7 for Figure 5 A schematic diagram of the planar structure of the first end face of an embodiment of the main magnetic tile; Figure 8 for Figure 5 A schematic diagram of the planar structure of the first end face of an embodiment of the main magnetic tile; Figure 9 for Figure 5 A schematic diagram of the planar structure of the first end face of an embodiment of the main magnetic tile; Figure 10 for Figure 5 A schematic diagram of the planar structure of the first end face of an embodiment of the main magnetic tile; Figure 11 for Figure 1 A three-dimensional structural diagram of the auxiliary magnetic tile in the diagram; Figure 12 for Figure 11 A schematic diagram of the planar structure of the third side of the auxiliary magnetic tile; Figure 13 for Figure 11 A schematic diagram of the planar structure of the first end face of the auxiliary magnetic tile; Figure 14 A plan view of a portion of the structure of the rotor provided in the second embodiment of this utility model; Figure 15 for Figure 14 A schematic diagram of the planar structure of the first end face of the auxiliary magnetic tile; Figure 16 for Figure 14 A schematic diagram of the rotor structure of another embodiment of the auxiliary magnetic tile; Figure 17 for Figure 16 A schematic diagram of the planar structure of the first end face of the auxiliary magnetic tile.

[0024] Explanation of icon numbers: 100. Rotor; 1. Main body; 2. Magnet tile; 2a. Main magnet tile; 2b. Auxiliary magnet tile; 21. First end face; 22. First side face; 23. Second side face; 24. Third side face; 25. Groove; 251. First groove; 252. Second groove.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] Permanent magnet synchronous motors have high power density and torque density, and are widely used in the electrical appliance field. To meet the current demands of electrical appliances, motors are often designed with high power density in mind. In some designs, the gaps between rotor magnets are small. Compared to conventional magnet designs, relying solely on gap material flow cannot meet the rotor coating bonding force requirements, resulting in rotor coating bonding force issues. Therefore, it is necessary to provide a matching design scheme to improve the rotor coating bonding force.

[0030] In view of this, the present invention proposes a rotor, please refer to [link / reference needed]. Figures 1 to 17 The present invention relates to an embodiment of the rotor proposed in this application. The rotor will be described in detail below with reference to the specific accompanying drawings.

[0031] Please see Figures 1 to 4 as well as Figure 14 and Figure 16The rotor 100 includes a main body 1, a plurality of magnetic tiles 2, and a plastic coating layer. The plurality of magnetic tiles 2 are mounted on the main body 1, and the plurality of magnetic tiles 2 include main magnetic tiles 2a and auxiliary magnetic tiles 2b. The magnetic poles of the main magnetic tiles 2a are distributed radially along the rotor 100, and the magnetic poles of the auxiliary magnetic tiles 2b are distributed circumferentially along the rotor 100. The auxiliary magnetic tiles 2b are disposed between two adjacent main magnetic tiles 2a. The plastic coating layer connects the main body 1 and the plurality of magnetic tiles 2, and the plastic coating layer at least partially covers the plurality of magnetic tiles 2. At the joint surface between the plurality of magnetic tiles 2 and the plastic coating layer, at least one joint surface of the magnetic tile 2 is provided with a groove 25, or the joint surfaces of two adjacent magnetic tiles 2 are provided with a height difference to form a groove 25, and the plastic coating material of the plastic coating layer is embedded in the groove 25.

[0032] In the technical solution of this utility model, the rotor 100 includes a main body 1 that supports a plurality of magnetic tiles 2. The plastic coating layer is used to connect the main body 1 and the plurality of magnetic tiles 2 to provide a plastic coating bonding force, so that the plurality of magnetic tiles 2 are fixed on the main body 1. Specifically, the magnetic tiles 2 include main magnetic tiles 2a and auxiliary magnetic tiles 2b. The magnetic poles of the main magnetic tiles 2a are distributed radially along the rotor 100, and are the main structure providing the magnetic field of the rotor 100. The magnetic poles of the auxiliary magnetic tiles 2b are distributed circumferentially along the rotor 100, and the auxiliary magnetic tiles 2b are disposed between two adjacent main magnetic tiles 2a to guide the main magnetic tiles 2a. The magnetic field is concentrated towards the stator to increase the magnetic density and thus improve the motor performance. In this configuration, the auxiliary magnetic tile 2b is provided at the interval between the two main magnetic tiles 2a, and the gap between the main magnetic tiles 2a and the auxiliary magnetic tiles 2b is small, making it difficult for the plastic coating material to flow into the gap between the main magnetic tiles 2a and the auxiliary magnetic tiles 2b. This results in a decrease in the plastic coating bonding force and a risk that the magnetic tile 2 will detach from the main body 1 during the plastic coating process. Therefore, this application provides the groove 25 structure at the joint surface between the magnetic tile 2 and the plastic coating layer. By guiding the plastic coating material into the groove 25, the plastic coating bonding force is improved, thus meeting the functional requirements.

[0033] It should be noted that the number of main magnetic tiles 2a is not specifically limited, but is based on actual needs. Similarly, the number of auxiliary magnetic tiles 2b relative to the main magnetic tiles 2a is also not limited. One auxiliary magnetic tile 2b can be placed between every two main magnetic tiles 2a, or the auxiliary magnetic tiles 2b can be placed between some of the main magnetic tiles 2a. The goal is to achieve a magnetic focusing effect and ensure stable motor operation. In this embodiment, the rotor 100 mainly adopts a "Halbach Array" magnet structure, meaning that one auxiliary magnetic tile 2b is placed between every two adjacent main magnetic tiles 2a, and the magnetic pole direction of the auxiliary magnetic tiles 2b is set according to the array arrangement requirements. This enhances the magnetic field of the magnetic tiles 2b on the stator side and improves the motor performance.

[0034] Furthermore, the groove 25 proposed in this application can be provided at the joint surface between the magnetic tile 2 and the plastic coating layer, so that the plastic coating of the plastic coating layer is embedded in the groove 25 to improve the plastic coating bonding force; or the joint surfaces of two adjacent magnetic tiles 2 can be set with a height difference to form the groove 25, so that the plastic coating material of the plastic coating layer is embedded in the groove 25 to improve the plastic coating bonding force. The specific setting method depends on the actual structural requirements and is not limited here.

[0035] Specifically, the magnetic tile 2 has two first end faces 21 located axially on the rotor 100, a first side face 22 facing the main body 1, a second side face 23 facing away from the main body 1, and two third side faces 24 opposite to adjacent magnetic tiles 2. In the magnetic tile 2 arrangement structure of this application, the third side face 24 of the magnetic tile 2 is located at the gap between two adjacent magnetic tiles 2. This gap is small, as described above, and will not be repeated here. Therefore, it is difficult for the plastic coating to flow in. Thus, the third side face 24, as the bonding surface, is difficult to provide the required plastic coating bonding force. The magnetic tile 2 is close to the main body 1. One side of the main body 1, namely the first side surface 22, is generally limited by the main body 1. Therefore, in some embodiments of this application, the mating surface of the magnetic tile 2 can be set as the first end face 21; in other embodiments of this application, the mating surface of the magnetic tile 2 can be set as the second side surface 23; in still other embodiments of this application, the mating surface of the magnetic tile 2 can be set as both the first end face 21 and the second side surface 23. The specific setting method is based on the actual structural requirements and is not limited here. The setting method of the groove 25 is also adapted to the specific setting of the mating surface to meet the functional requirements.

[0036] Specifically, please refer to Figure 5 and Figure 11In the first embodiment of this application, the mating surface includes at least one first end face 21; the first end face 21 is provided with the groove 25, so that the plastic coating layer covers the first end face 21 of the magnetic tile 2, so that the plastic coating layer has the function of restricting the magnetic tile 2 from moving in the axial direction of the rotor 100. On this basis, the plastic coating material of the plastic coating layer is embedded in the groove 25 of the first end face 21 of the magnetic tile 2 along the axial direction of the rotor 100, thereby achieving the purpose of restricting the magnetic tile 2 from moving in the radial direction of the rotor 100. Furthermore, the mating surface can be one of the first end faces 21 of the magnetic tile 2, or it can be two of the first end faces 21. That is, while ensuring the stability of the magnetic tile 2 after plastic coating, the mating surface can be only one of the first end faces 21 of the magnetic tile 2. In other words, the groove 25 can be provided only on one of the first end faces 21 of the magnetic tile 2. However, it is obviously more reliable to provide the groove 25 on both of the first end faces 21. In this embodiment, the groove 25 is provided on both of the first end faces 21 of the magnetic tile 2. Furthermore, in the first embodiment, the plastic coating layer can cover the second side 23 of the magnetic tile 2, or it can avoid the second side 23 so that the second side 23 is exposed. In this case, it can be understood that when the plastic coating layer covers the second side 23 of the magnetic tile 2, the plastic coating layer has actually limited the magnetic tile 2, and the groove 25 on the first end face 21 has a smaller effect. Therefore, this embodiment mainly addresses the case where the second side 23 is exposed, and the groove 25 on the first end face 21 ensures the plastic coating bonding force of the magnetic tile 2.

[0037] In addition, please see Figures 7 to 10 as well as Figure 13Considering the forming of the groove 25 on the magnetic tile 2, directly setting the groove 25 in the middle of the first end face 21 can achieve the purpose of improving the plastic coating bonding force. However, the magnetic tile 2 with such a setting is difficult to manufacture by mold. Therefore, in this embodiment, the groove 25 is set on the edge of the first end face 21 so that the groove 25 penetrates the side of the magnetic tile 2. Specifically, the groove 25 penetrates at least one of the two third side faces 24 and the second side face 23. In this way, the mold corresponding to the position of the groove 25 can be laterally demolded along the side through which the groove 25 penetrates. That is, with such a setting, the magnetic tile 2 with the groove 25 on the first end face 21 can be formed by mold and meet the structural design requirements. Of course, the groove 25 can also be provided through the first side surface 22. However, if it is provided in this way, the plastic coating material embedded in the groove 25 mainly restricts the magnetic tile 2 from moving toward the main body 1, which is the same direction that the main body 1 restricts the movement of the magnetic tile 2. However, it cannot restrict the movement of the magnetic tile 2 away from the main body 1. Therefore, the plastic coating material embedded in the groove 25 cannot play the role of positioning and fixing the magnetic tile 2 in conjunction with the main body 1, and cannot meet the structural requirements. However, the above problem does not exist when the groove is provided on the second side surface 23 and the third side surface 24.

[0038] Specifically, regarding the arrangement of the groove 25, this embodiment also considers the structural differences between the main magnetic tile 2a and the auxiliary magnetic tile 2b. The auxiliary magnetic tile 2b is smaller than the main magnetic tile 2a. Setting the groove 25 on the auxiliary magnetic tile 2b allows it to directly penetrate both third side surfaces 24, facilitating molding and resulting in stronger plastic coating. However, for the larger main magnetic tile 2a, setting the groove 25 to penetrate both third side surfaces 24 would be difficult to mold, although it would provide stronger plastic coating, but it would be impractical. Therefore, the groove 25 on the main magnetic tile 2a penetrates one side surface. Since the second side surface 23 is larger than the third side surface 24, facilitating the molding of the groove 25, the groove 25 on the main magnetic tile 2a is positioned on the first end face 21 near the edge of the second side surface 23, penetrating the second side surface 23. In summary, in this embodiment, please refer to... Figures 7 to 10 The groove 25 includes a first groove 251 disposed on the main magnetic tile 2a, and the first groove 251 is disposed through the second side surface 23 of the main magnetic tile 2a; please continue reading Figure 13The groove 25 includes a second groove 252 disposed on the auxiliary magnetic tile 2b, and the second groove 252 is disposed through the two third side surfaces 24 of the auxiliary magnetic tile 2b. It is understood that the number of grooves 25 disposed on a first end face 21 is not limited. For example, on the main magnetic tile 2a, multiple first grooves 251 can be disposed, and grooves 25 penetrating through the third side surfaces 24 can also be added; on the auxiliary magnetic tile 2b, multiple second grooves 252 can be disposed, and grooves 25 penetrating through the second side surfaces 23 can also be added.

[0039] Based on the above description of the groove 25 structure, the depth of the groove 25 formed on the first end face 21 in the first embodiment of this application also needs to be limited. When the depth is too small, it cannot provide sufficient plastic bonding force, while when the depth is too large, it affects the magnetic field of the magnetic tile 2, thereby affecting the motor performance. Specifically, in this embodiment, the depth of the groove 25 in the axial direction of the rotor 100 is limited to not less than 0.3 mm and not more than 5 mm, so as to meet the functional requirements.

[0040] In addition, please see Figures 14 to 17In the second embodiment of this application, the mating surface includes the second side surface 23. In the radial direction of the rotor 100, among adjacent main magnetic tiles 2a and auxiliary magnetic tiles 2b, the second side surface 23 of the main magnetic tile 2a protrudes from the second side surface 23 of the auxiliary magnetic tile 2b to define the groove 25. Thus, the groove 25 is disposed away from the main body 1. The plastic coating layer needs to cover the first end face 21 of the magnetic tile 2 to be embedded in the groove 25 corresponding to it, so that the plastic coating layer has the function of restricting the movement of the magnetic tile 2 in the axial direction of the rotor 100. Based on this, the plastic coating material of the plastic coating layer is embedded in the groove 25 of the second side surface 23 of the magnetic tile 2 along the axial direction of the rotor 100, thereby achieving the purpose of restricting the movement of the magnetic tile 2 in the radial direction of the rotor 100. It should be noted that while protruding the second side 23 of the auxiliary magnetic tile 2b from the second side 23 of the main magnetic tile 2a can define the groove 25, this configuration reduces the volume of the main magnetic tile 2a, thereby lowering the magnetic field strength. Therefore, in this embodiment, the second side 23 of the main magnetic tile 2a protrudes from the second side 23 of the auxiliary magnetic tile 2b to avoid the aforementioned problem. Furthermore, in the second embodiment, the plastic coating material of the plastic coating layer is embedded within the groove 25 defined by the second side 23 of the auxiliary magnetic tile 2b to limit the auxiliary magnetic tile 2b. The limiting of the main magnetic tile 2a can be achieved by the plastic coating layer covering the second side 23 of the main magnetic tile 2a, or by the plastic coating layer avoiding the second side 23 of the main magnetic tile 2a, leaving the second side 23 exposed. The auxiliary magnetic tiles 2b located on both sides of the main magnetic tile 2a then limit the main magnetic tile 2a. However, the limiting effect of the auxiliary magnetic tiles 2b... The main magnetic tile 2a and the auxiliary magnetic tile 2b have certain requirements on their shape and structure, which increases the design difficulty and reduces the versatility of the solution. Therefore, in this embodiment, the plastic coating layer covers the second side 23 of the main magnetic tile 2a to limit the position of the main magnetic tile 2a. Of course, based on the structure of the plastic coating layer limiting the position of the main magnetic tile 2a, the shape and structure of the main magnetic tile 2a and the auxiliary magnetic tile 2b can still be limited. That is, the auxiliary magnetic tile 2b can still limit the position of the main magnetic tile 2a. This is not limited here.Furthermore, in this embodiment, the second side surface 23 of the main magnetic tile 2a protrudes beyond the second side surface 23 of the auxiliary magnetic tile 2b. In practice, the first end face 21 of the main magnetic tile 2a could also protrude beyond the first end face 21 of the auxiliary magnetic tile 2b. Thus, by limiting the shape and structure of the main magnetic tile 2a and the auxiliary magnetic tile 2b, the auxiliary magnetic tile 2b can limit the main magnetic tile 2a. Simultaneously, the plastic coating material embedded at the first end face 21 of the auxiliary magnetic tile 2b can also limit the main magnetic tile 2a, thereby improving the plastic coating bonding force. The auxiliary magnetic tile 2b, by covering its second side surface 23 with the plastic coating layer for limitation, can also ensure the stability of the main magnetic tile 2a and the auxiliary magnetic tile 2b after plastic coating. However, this method obviously requires higher structural fit, is relatively difficult to design, and has relatively poor applicability. Furthermore, when the auxiliary magnetic tile 2b's axial dimension in the rotor 100 is smaller than that of the main magnetic tile 2a, it may also affect the overall magnetic field setting, resulting in poor practicality.

[0041] Specifically, the second side 23 of the main magnetic tile 2a can protrude from the second side 23 of the auxiliary magnetic tile 2b in various ways, including but not limited to a partial protrusion along the axial direction of the rotor 100, or an increased edge of the second side 23 of the main magnetic tile 2a, as long as the above-mentioned effect is achieved. In this embodiment, the size of the auxiliary magnetic tile 2b in the radial direction of the rotor 100 is limited to the size of the main magnetic tile 2a, so that the auxiliary magnetic tile 2b and the main magnetic tiles 2a on both sides are set with a height difference to form the groove 25. The structure is simple and easy to design and mold. Based on this structural setting, in order to ensure the bonding force of the plastic coating, it is necessary to limit the relevant dimensional relationships. Specifically, the dimensional difference between the main magnetic tile 2a and the auxiliary magnetic tile 2b in the radial direction of the rotor 100 is A, and the dimensional difference between the main magnetic tile 2a and the auxiliary magnetic tile 2b in the radial direction of the rotor 100 is B. Then, 0.3mm ≤ A ≤ 0.4B, thus satisfying the structural and functional requirements.

[0042] Furthermore, the auxiliary magnetic tile 2b has a width in the circumferential direction of the rotor 100, and its width narrows in at least one section in the radial direction of the rotor 100. In some embodiments, this width setting can limit the shape of the main magnetic tile 2a, thus achieving the structural arrangement of the main magnetic tile 2a and the auxiliary magnetic tile 2b described above, allowing the auxiliary magnetic tile 2b to limit the main magnetic tile 2a. However, the main purpose of narrowing the width of at least one section of the auxiliary magnetic tile 2b is to make it asymmetrically arranged in the radial direction of the rotor 100, preventing the first side 22 and the second side 23 of the auxiliary magnetic tile 2b from being interchangeable. This restricts the installation state of the auxiliary magnetic tile 2b, preventing mistaken installation and ensuring the accuracy of its magnetic pole orientation after installation. From a structural design perspective, this avoids the auxiliary magnetic tile 2b affecting the overall magnetic field of the rotor 100 if installed in the wrong direction, thus ensuring motor performance.

[0043] Specifically, the above-mentioned error-proofing effect can be achieved by setting a section of the width of the auxiliary magnetic tile 2b to a gradually changing size. In this embodiment, the entire width of the auxiliary magnetic tile 2b is directly set to a gradually changing size, which facilitates the forming of the auxiliary magnetic tile 2b and also facilitates the forming of the main magnetic tile 2a that is adapted to it. That is, the width of the auxiliary magnetic tile 2b gradually narrows in the direction of approaching or moving away from the main body 1.

[0044] Furthermore, to ensure the performance of the auxiliary magnetic tile 2b and the main magnetic tile 2a that cooperates with it, this embodiment limits the maximum difference in width of the auxiliary magnetic tile 2b to not less than 0.7mm, and at the same time, the difference between the minimum and / or maximum width of the auxiliary magnetic tile 2b and the radial dimension of the auxiliary magnetic tile 2b in the rotor 100 is not less than 0.7mm.

[0045] Furthermore, the main magnetic tile 2a has a second side surface 23 facing away from the main body 1. The second side surface 23 is arranged in a multi-segment arc configuration, so that the size of the main magnetic tile 2a in the radial direction of the rotor 100 gradually decreases from its center to its sides in the circumferential direction of the rotor 100. This effectively weakens the harmonic content in the back EMF, reduces the torque pulsation and cogging torque of the motor, and improves the vibration and noise level of the motor. The multiple arc segments can be symmetrically or asymmetrically arranged, ensuring that the size of the main magnetic tile 2a in the radial direction of the rotor 100 gradually decreases from its center to its sides. In this embodiment, the multiple arc segments are arranged as a symmetrical structure. This facilitates manufacturing and reduces manufacturing costs. Furthermore, the magnetic field of the main magnetic tile 2a is also symmetrically arranged, which facilitates the design and arrangement of the overall magnetic field of the rotor 100, reducing design difficulty and costs.

[0046] It is understood that the rotor 100 proposed in this application can be an inner rotor 100 structure or an outer rotor 100 structure to adapt to different types of motors. Specifically, when the rotor 100 is an outer rotor 100 structure, that is, in the main embodiment proposed in this application, the main body 1 includes a rotor 100 yoke, the rotor 100 yoke includes a ring-shaped mounting portion, and a plurality of magnetic tiles 2 are mounted on the inner side of the mounting portion, thereby allowing the magnetic tiles 2 to move away from the axis of the rotor 100 through the mounting portion. The movement of the magnetic tiles 2 in the mounting part is restricted by the plastic coating layer and the groove 25 to ensure the stability of the magnetic tiles 2 installed in the mounting part. Similarly, when the rotor 100 is an inner rotor 100 structure, the main body 1 includes a rotor 100 core, and a plurality of magnetic tiles 2 are installed on the outside of the rotor 100 core. In this way, the movement of the magnetic tiles 2 in the direction close to the rotor 100 axis is restricted by the rotor 100 core. The movement of the magnetic tiles 2 in the direction close to the rotor 100 axis is restricted by the rotor 100 core. The movement of the magnetic tiles 2 in the rotor 100 core is restricted by the plastic coating layer and the groove 25 to ensure the stability of the magnetic tiles 2 installed in the rotor 100 core.

[0047] This application also proposes an electric motor, wherein the electric motor includes a motor housing, a stator and a rotor 100, the stator being fixedly disposed in the motor housing; the rotor 100 being rotatably disposed in the motor housing, and the specific structure of the rotor 100 is as described in the above embodiments. Since the electric motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0048] This application also proposes a household appliance, wherein the household appliance includes the motor, and the specific structure of the motor is as described in the above embodiments. Since the household appliance adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0049] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A rotor, characterized in that, include: main body; Multiple magnetic tiles are installed on the main body, and the multiple magnetic tiles include main magnetic tiles and auxiliary magnetic tiles. The magnetic poles of the main magnetic tiles are distributed radially along the rotor, and the magnetic poles of the auxiliary magnetic tiles are distributed circumferentially along the rotor. The auxiliary magnetic tiles are disposed between two adjacent main magnetic tiles. as well as, A plastic coating layer connects the main body and the plurality of magnetic tiles, and the plastic coating layer at least partially covers the plurality of magnetic tiles; Wherein, at least one of the magnetic tiles has a groove at the joint surface of the plurality of magnetic tiles and the plastic coating layer, or the joint surfaces of two adjacent magnetic tiles are arranged with a height difference to form a groove, and the plastic coating material of the plastic coating layer is embedded in the groove.

2. The rotor as claimed in claim 1, characterized in that, The magnetic tile has two first end faces located in the axial direction of the rotor, a first side face facing the main body, a second side face facing away from the main body, and two third side faces opposite to the adjacent magnetic tile; The mating surfaces of the magnetic tile include the first end face and / or the second side face.

3. The rotor as described in claim 2, characterized in that, The mating surface includes at least one first end face; The groove is provided on the first end face.

4. The rotor as described in claim 3, characterized in that, The groove extends through at least one of the two third sides and the second side.

5. The rotor as described in claim 4, characterized in that, The groove includes a first groove disposed on the main magnetic tile, and the first groove extends through the second side surface of the main magnetic tile; and / or, The groove includes a second groove disposed on the auxiliary magnetic tile, and the second groove is disposed through the two third sides of the auxiliary magnetic tile.

6. The rotor as described in any one of claims 3 to 5, characterized in that, If the depth of the groove in the axial direction of the rotor is L, then 0.3mm≤L≤5mm.

7. The rotor as claimed in claim 2, characterized in that, The mating surface includes the second side surface; In the radial direction of the rotor, in adjacent main magnetic tiles and auxiliary magnetic tiles, the second side of the main magnetic tile is positioned to protrude from the second side of the auxiliary magnetic tile to define the groove.

8. The rotor as claimed in claim 7, characterized in that, The auxiliary magnetic tile is smaller in size in the radial direction of the rotor than the main magnetic tile, so that the auxiliary magnetic tile is set at a height difference with the main magnetic tiles on both sides to form the groove.

9. The rotor as claimed in claim 8, characterized in that, If the difference in size between the main magnetic tile and the auxiliary magnetic tile in the radial direction of the rotor is A, and the size of the main magnetic tile in the radial direction of the rotor is B, then 0.3mm≤A≤0.4B.

10. The rotor as claimed in claim 7, characterized in that, The dimension of the magnetic tile in the circumferential direction of the rotor is its width, and in the radial direction of the rotor, at least a section of the auxiliary magnetic tile has a narrowing width.

11. The rotor as claimed in claim 10, characterized in that, The width of the auxiliary magnetic tile gradually narrows in the direction of approaching or moving away from the main body.

12. The rotor as claimed in claim 11, characterized in that, The maximum difference in width of the auxiliary magnetic tile is not less than 0.7 mm.

13. The rotor as claimed in claim 12, characterized in that, The difference between the minimum and / or maximum width of the auxiliary magnet and the dimension of the auxiliary magnet in the radial direction of the rotor is not less than 0.7 mm.

14. The rotor as claimed in claim 1, characterized in that, The main magnet has a second side facing away from the main body. The second side is arranged in a multi-arc configuration so that the size of the main magnet in the radial direction of the rotor gradually decreases from its center to its sides in the circumferential direction of the rotor.

15. The rotor as claimed in claim 14, characterized in that, The multiple arc segments are arranged symmetrically.

16. An electric motor, characterized in that, include: Motor housing; The stator is fixed to the motor housing; as well as, The rotor is rotatably mounted on the motor housing, and the rotor is the rotor as described in any one of claims 1-15.

17. A household appliance, characterized in that, Including the motor as described in claim 16.

Images