Driving device and household appliance

Abstract

The utility model discloses a driving device and a household electrical appliance, the driving electrical appliance comprises an axial magnetic flux motor, a first load and a second load, the axial magnetic flux motor comprises a shell, a stator, a first rotor, a second rotor, a first bearing, a second bearing, a first shaft body and a second shaft body, the shell and the stator are in injection molding connection, the stator is arranged between the first rotor and the second rotor, and the first bearing is arranged between the first rotor and the second rotor. The first rotor comprises a first permanent magnet, the second rotor comprises a second permanent magnet, the first shaft body is supported on the shell and penetrates through the first bearing, the second shaft body is supported on the shell and penetrates through the second bearing, the first shaft body and the second shaft body are separated, and the first load, the first permanent magnet and the first bearing are connected and fixed so as to be rotatably arranged through the first bearing; the second load, the second permanent magnet and the second bearing are connected and fixed so as to be rotatably arranged through the second bearing, the first load and the second load can be driven through the same axial magnetic flux motor, the space occupation of the driving device is reduced, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of motors, and particularly to a driving device and a household appliance. Background Art

[0002] In related technologies, if two targets need to be driven, two independent motors are often set up. One motor drives one target, and the other motor drives the other target, thus forming two sets of systems. Since two motors are set up, the volume occupied is relatively large and the cost is relatively high. Summary of the Utility Model

[0003] This application aims to solve at least one of the technical problems in the related technologies to some extent. For this purpose, this application provides a driving device.

[0004] To achieve the above object, this application discloses a driving device, which includes:

[0005] An axial flux motor, which includes a housing, a stator, a first rotor, a second rotor, a first bearing, a second bearing, a first shaft body and a second shaft body. The housing and the stator are injection-molded and connected. The stator is arranged between the first rotor and the second rotor. The first rotor includes a first permanent magnet, and the second rotor includes a second permanent magnet. The first shaft body is supported by the housing and passes through the first bearing, and the second shaft body is supported by the housing and passes through the second bearing. The first shaft body and the second shaft body are separated from each other;

[0006] A first load, which is fixedly connected to the first permanent magnet and the first bearing so as to be rotatably arranged through the first bearing; and

[0007] A second load, which is fixedly connected to the second permanent magnet and the second bearing so as to be rotatably arranged through the second bearing.

[0008] In some embodiments of this application, the housing and the first shaft body are injection-molded and connected;

[0009] and / or, the housing and the second shaft body are injection-molded and connected.

[0010] In some embodiments of this application, the housing isolates the spaces on both sides of its axis. The first shaft body is arranged in the space on one axial side of the housing, and the second shaft body is arranged in the space on the other axial side of the housing.

[0011] In some embodiments of this application, the first load and the first permanent magnet are injection-molded and connected;

[0012] and / or, the first load and the first bearing are injection-molded and connected.

[0013] In some embodiments of the present application, the first load includes a first part and a second part, the first part and the second part are welded, and the second part is injection-molded and connected to the first permanent magnet and the first bearing.

[0014] In some embodiments of the present application, the second load is injection-molded and connected to the second permanent magnet;

[0015] And / or, the second load is injection-molded and connected to the second bearing.

[0016] In some embodiments of the present application, the second load includes a third part and a fourth part, the third part and the fourth part are welded, and the fourth part is injection-molded and connected to the second permanent magnet and the second bearing.

[0017] In some embodiments of the present application, the housing is provided with a first concave cavity, the stator surrounds the first concave cavity, and at least part of the first bearing is embedded in the first concave cavity;

[0018] And / or, the housing is provided with a second concave cavity, the stator surrounds the second concave cavity, and part of the second bearing is embedded in the second concave cavity.

[0019] In some embodiments of the present application, the first load is adapted to drive fluid flow;

[0020] And / or, the second load is adapted to drive fluid flow.

[0021] In some embodiments of the present application, the first load is an impeller;

[0022] And / or, the second load is an impeller.

[0023] In some embodiments of the present application, the first load is a centrifugal impeller;

[0024] And / or, the second load is a centrifugal impeller.

[0025] The second aspect of the present application discloses a household appliance, and the household appliance includes the above-mentioned driving device.

[0026] Other advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. Description of the Drawings

[0027] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other designs can also be obtained based on the structures shown in these drawings.

[0028] Figure 1 Schematic diagram of the driving device in some embodiments;

[0029] Figure 2 Exploded view of the driving device in some embodiments;

[0030] Figure 3 Cross-sectional view of the driving device in some embodiments;

[0031] Figure 4 Schematic diagram of the combination of the housing, stator and first shaft body in some embodiments;

[0032] Figure 5 Schematic diagram of the combination of the housing, stator and second shaft body in some embodiments;

[0033] Figure 6 Schematic diagram of the combination of the first load, first permanent magnet and first bearing in some embodiments;

[0034] Figure 7 Schematic diagram of the combination of the first load, first permanent magnet and first bearing in some embodiments (viewpoint is different from Figure 6 );

[0035] Figure 8 For Figure 6 Cross-sectional view of the shown structure;

[0036] Figure 9 Schematic diagram of the combination of the second load, second permanent magnet and second bearing in some embodiments;

[0037] Figure 10 Schematic diagram of the combination of the second load, second permanent magnet and second bearing in some embodiments (viewpoint is different from Figure 9 ).

[0038] Explanation of the reference numerals in the drawings:

[0039] Drive device 100, axial flux motor 1000, first rotor 1100, first permanent magnet 1110, second rotor 1200, second permanent magnet 1210, stator 1300, housing 1400, first cavity 1410, second cavity 1420, first bearing 1510, second bearing 1520, first shaft body 1610, second shaft body 1620, first load 2100, first part 2110, second part 2120, second load 2200, third part 2210, fourth part 2220.

[0040] The realization, functional features and advantages of the purpose of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0043] In the present application, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0044] In addition, in the present application, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0045] In a first aspect of the present application, a driving device 100 is proposed, which combines with Figures 1 to 3 As shown, in some embodiments, the driving device 100 includes an axial-flux motor 1000, a first load 2100, and a second load 2200. One axial side of the axial-flux motor 1000 is used to drive the first load 2100 to rotate, and the other axial side of the axial-flux motor 1000 drives the second load 2200 to rotate.

[0046] The axial-flux motor 1000 is different from the radial-flux motor. The magnetic flux lines of the axial-flux motor 1000 mainly run along the axial direction, where the axial direction refers to the extension direction of the first shaft body 1610 and the second shaft body 1620 of the central axis ( Figure 3 of the axial-flux motor 1000). An output can be formed on one axial side of the axial-flux motor 1000, and an output can also be formed on the other axial side of the axial-flux motor 1000. The first load 2100 cooperates with one axial side of the axial-flux motor 1000, and the second load 2200 cooperates with the other axial side of the axial-flux motor 1000. The so-called cooperation can be direct or indirect, that is, one axial side of the axial-flux motor 1000 can transfer force to the first load 2100, and the other axial side of the axial-flux motor 1000 can transfer force to the second load 2200. In this way, the first load 2100 and the second load 2200 can be driven to rotate by the same axial-flux motor 1000. By such an arrangement, the number of motors is reduced, which is beneficial to reducing the space occupation and cost.

[0047] Specifically, the axial flux motor 1000 includes a housing 1400, a stator 1300, a first rotor 1100, and a second rotor 1200. The so-called first rotor 1100 and second rotor 1200 are the parts that are rotatable relative to the stator 1300. The first rotor 1100 is disposed on one axial side of the stator 1300, and the second rotor 1200 is disposed on the other axial side of the stator 1300, such that the stator 1300 is located between the first rotor 1100 and the second rotor 1200. The stator 1300 is disposed on the housing 1400. By providing the housing 1400, the housing 1400 can be connected and fixed to the installation area, thereby realizing the support of the axial flux motor 1000. At the same time, the housing 1400 can also wrap and protect the stator 1300, improving the protection ability of the stator 1300. The housing 1400 and the stator 1300 are injection-molded and connected, that is, at least part of the housing 1400 is injection-molded, and is connected to the stator 1300 synchronously during the molding process, such that the stator 1300 is embedded in at least part of the housing 1400. For example, the stator 1300 is placed in a mold, and plastic is injected into the mold. After the plastic is molded, it forms the housing 1400 and the housing 1400 and the stator 1300 are combined together. Through the injection-molded connection between the housing 1400 and the stator 1300, the housing 1400 and the stator 1300 are tightly combined, improving the structural stability and durability, and can eliminate / reduce subsequent assembly processes, improving production efficiency. It is precisely because of the injection-molded connection between the housing 1400 and the stator 1300 that it is beneficial to realize the isolation of the spaces on both axial sides of the housing 1400. It can be understood that the stator 1300 includes an iron core and windings disposed on the iron core. When the stator 1300 is powered on, the windings are powered on, such that the windings can generate a changing magnetic field. A junction box can be provided on the housing 1400. The windings are connected to the junction box, and the wiring terminals of the controller are connected to the junction box, thereby realizing power supply and / or communication.

[0048] The first rotor 1100 includes a first permanent magnet 1110, and the second rotor 1200 includes a second permanent magnet 1210. The materials of the first permanent magnet 1110 and the second permanent magnet 1210 can be rare earth permanent magnet materials, ferrite permanent magnet materials, alnico alloys, Fe-Cr-Co alloys, etc., which are not limited in this embodiment. In this embodiment, the first permanent magnet 1110 is fixedly connected to the first load 2100. The first load 2100 not only has its own function but also serves as the support framework of the first permanent magnet 1110, so that the first permanent magnet 1110 and the first load 2100 are combined into a rotor structure. The second permanent magnet 1210 is fixedly connected to the second load 2200. The second load 2200 not only has its own function but also serves as the support framework of the second permanent magnet 1210, so that the second permanent magnet 1210 and the second load 2200 are combined into a rotor structure. By setting like this, the first rotor 1100 can cancel the design of the support structure for the first permanent magnet 1110 alone, and the second rotor 1200 can also cancel the design of the support structure for the second permanent magnet 1210 alone. Even it can be understood that the first rotor 1100 is the first permanent magnet 1110, and the second rotor 1200 is the second permanent magnet 1210. Compared with separately setting a support structure to support the first permanent magnet 1110 and the second permanent magnet 1210, this embodiment is beneficial to simplifying the structure and reducing the space occupied by the driving device 100, and is more conducive to the miniaturization design of the driving device 100.

[0049] On one axial side of the axial flux motor 1000, the output is mainly formed by the first rotor 1100 (the first permanent magnet 1110). On the other axial side of the axial flux motor 1000, the output is mainly formed by the second rotor 1200 (the second permanent magnet 1210). When the stator 1300 is energized, it can interact with the first rotor 1100 (the first permanent magnet 1110) and the second rotor 1200 (the second permanent magnet 1210), thereby driving the first rotor 1100 (the first permanent magnet 1110) and the second rotor 1200 (the second permanent magnet 1210) to rotate, causing the first load 2100 and the second load 2200 to rotate. Since the stator 1300 is located between the first rotor 1100 and the second rotor 1200, and the first load 2100 is fixedly connected to the first permanent magnet 1110, and the second load 2200 is fixedly connected to the second permanent magnet 1210, the first load 2100 is arranged on one axial side of the stator 1300, and the second load 2200 is arranged on the other axial side of the stator 1300. By distributing the first load 2100 and the second load 2200 on both axial sides of the stator 1300, the eccentric wear of the shafting of the axial flux motor 1000 can be reduced or even avoided, and the operation of the axial flux motor 1000 can be made more stable. It can be understood that the so-called first load 2100 is a component driven by the axial flux motor 1000 to perform an action. The first load 2100 can be the final target object or a transmission part between the final target object and the axial flux motor 1000. Similarly, the second load 2200 is the same and will not be repeated here.

[0050] Furthermore, the axial flux motor 1000 includes a first bearing 1510 and a second bearing 1520. The main functions of the first bearing 1510 and the second bearing 1520 are to support the mechanical rotating body and reduce the friction coefficient during the movement. There are various types of the first bearing 1510 and the second bearing 1520, which can be selected according to the actual situation. For example, both the first bearing 1510 and the second bearing 1520 are graphite bearings. The first bearing 1510 is fixedly connected to the first load 2100, so that the first permanent magnet 1110, the first bearing 1510 and the first load 2100 are combined together. The second bearing 1520 is fixedly connected to the second load 2200, so that the second permanent magnet 1210, the second bearing 1520 and the second load 2200 are combined together, which is beneficial to the compact design of the driving device 100 and further reduces the space occupation. The first permanent magnet 1110, the first bearing 1510 and the first load 2100 are combined to form a first structure, and the first structure can rotate through the first bearing 1510. The second permanent magnet 1210, the second bearing 1520 and the second load 2200 are combined to form a second structure, and the second structure can rotate through the second bearing 1520.

[0051] Generally speaking, the first structure and the second structure need to be supported by a shafting to achieve rotation. Specifically, the axial flux motor 1000 includes a first shaft body 1610 and a second shaft body 1620. The first shaft body 1610 is supported by the housing 1400 and passes through the first bearing 1510, so as to support the first load 2100 and the first rotor 1100 (the first permanent magnet 1110). The second shaft body 1620 is supported by the housing 1400 and passes through the second bearing 1520, so as to support the second load 2200 and the second rotor 1200 (the second permanent magnet 1210). The first permanent magnet 1110, the first bearing 1510 and the first load 2100 are combined to form the first structure, and the second permanent magnet 1210, the second bearing 1520 and the second load 2200 are combined to form the second structure. The first bearing 1510 of the first structure is sleeved on the first shaft body 1610 for rotatable setting, and the second bearing 1520 of the second structure is sleeved on the second shaft body 1620 for rotatable setting. In this way, the assembly of the first structure and the second structure can be realized conveniently and quickly. When the stator 1300 is powered on, the first structure can rotate relative to the shaft body, and the second structure can rotate relative to the shaft body. It can be understood that the so-called support can be direct support or indirect support. In this embodiment, the first shaft body 1610 and the second shaft body 1620 are separated, that is, the first shaft body 1610 and the second shaft body 1620 are split components, and the first shaft body 1610 and the second shaft body 1620 do not affect each other. As Figure 3 shown, the first shaft body 1610 and the second shaft body 1620 are arranged at intervals along the axial direction of the axial flux motor 1000. By such an arrangement, the first shaft body 1610 and the second shaft body 1620 can be designed to be the same or different, and the first shaft body 1610 and the second shaft body 1620 can be designed according to the characteristics of the first load 2100 and the second load 2200, which is more flexible in layout. It is also because the first shaft body 1610 and the second shaft body 1620 do not affect each other that the first shaft body 1610 or the second shaft body 1620 can be disassembled and assembled separately during later maintenance, making the maintenance more convenient.

[0052] In some embodiments, the housing 1400 and the first shaft body 1610 are injection-molded and connected. Specifically, there are various ways to support the shaft body on the housing 1400. For example, the first shaft body 1610 and the housing 1400 are connected and fixed by interference fit, screw fastening and other methods. In this embodiment, the housing 1400 and the first shaft body 1610 are injection-molded and connected to achieve connection and fixation, further reducing the number of components. Similarly, the housing 1400 and the second shaft body 1620 are injection-molded and connected.

[0053] As can be seen from the above, the housing 1400 is also injection-molded and connected to the stator 1300, that is, the housing 1400 is injection-molded and connected to the stator 1300, the first shaft body 1610, and the second shaft body 1620, enhancing the bonding force between the housing 1400 and the stator 1300, the first shaft body 1610, and the second shaft body 1620, improving the structural stability and durability, and further improving the production efficiency. For example, the stator 1300, the first shaft body 1610, and the second shaft body 1620 are placed in a mold, and then plastic is injected into the mold. After the plastic is molded, it forms the housing 1400 and the housing 1400 is combined with the stator 1300, the first shaft body 1610, and the second shaft body 1620. For example Figure 3 As shown, it is exactly that the first shaft body 1610 is separated from the second shaft body 1620. Therefore, there is no need to penetrate the housing 1400, and the housing 1400 better isolates the spaces on both axial sides of the housing 1400. At this time, the first shaft body 1610 is combined with the housing 1400 and is in the space on one axial side of the housing 1400, and the second shaft body 1620 is combined with the housing 1400 and is in the space on the other axial side of the housing 1400.

[0054] Combined Figure 2 、 Figure 3 and Figures 6 to 10 As shown, in some embodiments, the first permanent magnet 1110 is disposed on the side of the first load 2100 facing the stator 1300. Disposing the first permanent magnet 1110 on the side of the first load 2100 facing the stator 1300 is beneficial to improving the efficiency of the axial flux motor 1000 compared with disposing the first permanent magnet 1110 on the side of the first load 2100 facing away from the stator 1300.

[0055] Similarly, the second permanent magnet 1210 is disposed on the side of the second load 2200 facing the stator 1300. Disposing the second permanent magnet 1210 on the side of the second load 2200 facing the stator 1300 is beneficial to improving the efficiency of the axial flux motor 1000 compared with disposing the second permanent magnet 1210 on the side of the second load 2200 facing away from the stator 1300.

[0056] In some embodiments, the first load 2100 is injection-molded and connected to the first permanent magnet 1110, that is, at least part of the first load 2100 is injection-molded and is synchronously connected to the first permanent magnet 1110 during the molding process, so that the first permanent magnet 1110 is embedded in at least part of the first load 2100. By setting like this, the first load 2100 and the first permanent magnet 1110 are tightly combined, improving the structural stability and durability, reducing the number of components, and being able to eliminate / reduce subsequent assembly processes, improving the production efficiency.

[0057] Similarly, the first load 2100 is injection-molded and connected to the first bearing 1510, that is, at least part of the first load 2100 is injection-molded, and is synchronously connected to the first bearing 1510 during the molding process, so that the first bearing 1510 is embedded in at least part of the first load 2100. By such an arrangement, the first load 2100 and the first bearing 1510 are tightly combined, improving the structural stability and durability, reducing the number of components, and being able to eliminate / reduce subsequent assembly processes, thereby improving production efficiency.

[0058] For example, the first permanent magnet 1110 and the first bearing 1510 are placed in a mold, and plastic is injected into the mold. After the plastic is molded, it forms the first load 2100, and the first load 2100 is combined with the first permanent magnet 1110 and the first bearing 1510. Through the injection-molding connection of the first load 2100, the first permanent magnet 1110, and the first bearing 1510, the first load 2100, the first permanent magnet 1110, and the first bearing 1510 are tightly combined into one body, reducing the number of parts, improving the structural stability and durability, and being able to eliminate / reduce subsequent assembly processes, thereby improving production efficiency.

[0059] In some embodiments, the second load 2200 is injection-molded and connected to the second permanent magnet 1210, that is, at least part of the second load 2200 is injection-molded, and is synchronously connected to the second permanent magnet 1210 during the molding process, so that the second permanent magnet 1210 is embedded in at least part of the second load 2200. By such an arrangement, the second load 2200 and the second permanent magnet 1210 are tightly combined, improving the structural stability and durability, reducing the number of components, and being able to eliminate / reduce subsequent assembly processes, thereby improving production efficiency.

[0060] Similarly, the second load 2200 is injection-molded and connected to the second bearing 1520, that is, at least part of the second load 2200 is injection-molded, and is synchronously connected to the second bearing 1520 during the molding process, so that the second bearing 1520 is embedded in at least part of the second load 2200. By such an arrangement, the second load 2200 and the second bearing 1520 are tightly combined, improving the structural stability and durability, reducing the number of components, and being able to eliminate / reduce subsequent assembly processes, thereby improving production efficiency.

[0061] For example, the second permanent magnet 1210 and the second bearing 1520 are placed into a mold, and plastic is injected into the mold. After the plastic is molded, it forms the second load 2200, and the second load 2200 is combined with the second permanent magnet 1210 and the second bearing 1520. Through the injection molding connection of the second load 2200, the second permanent magnet 1210, and the second bearing 1520, the second load 2200 is tightly integrated with the second permanent magnet 1210 and the second bearing 1520, reducing the number of parts, improving the structural stability and durability, and eliminating / reducing subsequent assembly processes, thereby improving production efficiency.

[0062] Combined Figure 2 、 Figure 3 and Figures 6 to 8 As shown, in some embodiments, the first load 2100 includes a first part 2110 and a second part 2120. The first part 2110 and the second part 2120 are welded, and the second part 2120 and the first permanent magnet 1110, the first bearing 1510 are injection molded and connected. It can be understood that the first load 2100 may not be convenient for one-time injection molding. Therefore, the first load 2100 can be designed to be prepared by a method of welding and fixing split components. For example, the first load 2100 includes a first part 2110 and a second part 2120. The first part 2110 is injection molded, and during the injection molding process of the second part 2120, it is connected to the first permanent magnet 1110 and the first bearing 1510, and then the first part 2110 and the second part 2120 are welded (such as ultrasonic welding). In this way, both the structural design of the first load 2100 can be satisfied, and to a certain extent, the bonding strength between the first load 2100 and the first permanent magnet 1110 and the first bearing 1510 can be ensured. When the first permanent magnet 1110 is arranged on the side of the first load 2100 facing the stator 1300, the second part 2120 needs to be designed between the first part 2110 and the stator 1300.

[0063] Similarly, combined Figure 2 、 Figure 3 、 Figure 9 and Figure 10As shown, in some embodiments, the second load 2200 includes a third part 2210 and a fourth part 2220. The third part 2210 is welded to the fourth part 2220, and the fourth part 2220 is injection-molded and connected to the second permanent magnet 1210 and the second bearing 1520. It can be understood that it may not be convenient to integrally injection-mold the second load 2200. Therefore, the second load 2200 can be designed to be prepared by a method of fixing split components by welding. For example, the second load 2200 includes a third part 2210 and a fourth part 2220. The third part 2210 is injection-molded, and during the injection-molding process of the fourth part 2220, it is connected to the second permanent magnet 1210 and the second bearing 1520, and then the third part 2210 and the fourth part 2220 are welded (such as ultrasonic welding). In this way, it can not only meet the structural design of the second load 2200, but also ensure to a certain extent the bonding strength between the second load 2200 and the second permanent magnet 1210 and the second bearing 1520. When the second permanent magnet 1210 is disposed on the side of the second load 2200 facing the stator 1300, the fourth part 2220 needs to be designed between the third part 2210 and the stator 1300.

[0064] Combine Figures 3 to 5 As shown, in some embodiments, the housing 1400 is provided with a first cavity 1410. For example, the first cavity 1410 is provided on the side of the housing 1400 facing the first rotor 1100. The stator 1300 surrounds the first cavity 1410, and at least part of the first bearing 1510 is embedded in the first cavity 1410. Specifically, the stator 1300 has an annular structure, so that a certain space is surrounded by the stator 1300. Since the housing 1400 is injection-molded and connected to the stator 1300, when the first cavity 1410 is provided on the side of the housing 1400 facing the first rotor 1100, the first cavity 1410 can occupy at least part of the space surrounded by the stator 1300, and at least part of the first bearing 1510 is embedded in the first cavity 1410. In this way, the axial space occupied by the driving device 100 is further reduced, which is more conducive to miniaturization.

[0065] Similarly, the housing 1400 is provided with a second concave cavity 1420. For example, the second concave cavity 1420 is provided on the side of the housing 1400 facing the second rotor 1200, and the stator 1300 surrounds the second concave cavity 1420. At least part of the second bearing 1520 is embedded in the second concave cavity 1420. Specifically, the stator 1300 has an annular structure, so that a certain space is surrounded by the stator 1300. Since the housing 1400 and the stator 1300 are injection-molded and connected, when the second concave cavity 1420 is provided on the side of the housing 1400 facing the second rotor 1200, the second concave cavity 1420 can occupy at least part of the space surrounded by the stator 1300, and at least part of the second bearing 1520 is embedded in the second concave cavity 1420. In this way, the axial space occupied by the driving device 100 is further reduced, which is more conducive to miniaturization.

[0066] Combined Figures 1 to 3 and Figures 6 to 10 As shown, in some embodiments, the first load 2100 is used to drive the fluid to flow, that is, the axial flux motor 1000 drives the first load 2100 to rotate, thereby driving the fluid to flow. The flow of the fluid mainly proceeds along the flow channel. The flow channel can be bent or straight, so that it is convenient for the cooperation of the flow channel, the first load 2100 and the axial flux motor 1000. Similarly, the second load 2200 is used to drive the fluid to flow, that is, the axial flux motor 1000 drives the second load 2200 to rotate, thereby driving the fluid to flow. The flow of the fluid mainly proceeds along the flow channel. The flow channel can be bent or straight, so that it is convenient for the cooperation of the flow channel, the second load 2200 and the axial flux motor 1000. For example, the first load 2100 is an impeller, and the second load 2200 is also an impeller. In this way, the first load 2100 can be coaxially arranged with the axial flux motor 1000, and the second load 2200 can be coaxially arranged with the axial flux motor 1000. The rotation of the impeller drives the fluid to flow. It can be understood that the fluid includes but is not limited to gases and liquids. The sizes / structures of the first load 2100 and the second load 2200 can be the same or different.

[0067] Furthermore, the first load 2100 is a centrifugal impeller, so that the fluid can enter the first load 2100 along the axial direction of the first load 2100 and be discharged along the substantially radial direction. In this way, when the first load 2100 is designed to be coaxially arranged with the axial flux motor 1000, it is beneficial to reduce the space occupied in the axial direction and is more conducive to the arrangement of the structure. Similarly, the second load 2200 is a centrifugal impeller, so that the fluid can enter the second load 2200 along the axial direction of the second load 2200 and be discharged along the substantially radial direction. In this way, when the second load 2200 is designed to be coaxially arranged with the axial flux motor 1000, it is beneficial to reduce the space occupied in the axial direction and is more conducive to the arrangement of the structure.

[0068] The second aspect of the present application discloses a household appliance, which includes the above-mentioned driving device 100. The driving device 100 includes an axial flux motor 1000, a first load 2100, and a second load 2200. One axial side of the axial flux motor 1000 is used to drive the first load 2100 to rotate, and the other axial side of the axial flux motor 1000 drives the second load 2200 to rotate. For example, the household appliance is a floor sweeper, which has two rotatable brush heads. One brush head is regarded as the first load 2100, and the other brush head is regarded as the second load 2200. Of course, the household appliance can also be of other types, which will not be elaborated here one by one.

[0069] The axial flux motor 1000 includes a housing 1400, a stator 1300, a first rotor 1100, and a second rotor 1200. The so-called first rotor 1100 and second rotor 1200 are the parts that are rotatable relative to the stator 1300. The first rotor 1100 is arranged on one axial side of the stator 1300, and the second rotor 1200 is arranged on the other axial side of the stator 1300, so that the stator 1300 is located between the first rotor 1100 and the second rotor 1200. The stator 1300 is arranged on the housing 1400. By providing the housing 1400, the housing 1400 can be connected and fixed to the installation area, thereby realizing the support of the axial flux motor 1000. At the same time, the housing 1400 can also wrap and protect the stator 1300, improving the protection ability of the stator 1300. The housing 1400 and the stator 1300 are injection-molded and connected. Through the injection-molded connection of the housing 1400 and the stator 1300, the housing 1400 and the stator 1300 are tightly combined, improving the structural stability and durability, and can eliminate / reduce subsequent assembly processes, improving production efficiency. It is precisely because the housing 1400 and the stator 1300 are injection-molded and connected that it is beneficial to isolate the spaces on both axial sides of the housing 1400.

[0070] The first rotor 1100 includes a first permanent magnet 1110, and the second rotor 1200 includes a second permanent magnet 1210. The first permanent magnet 1110 is fixedly connected to the first load 2100. The first load 2100 not only has its own function but also serves as the support framework for the first permanent magnet 1110, so that the first permanent magnet 1110 and the first load 2100 are combined into a rotor structure. The second permanent magnet 1210 is fixedly connected to the second load 2200. The second load 2200 not only has its own function but also serves as the support framework for the second permanent magnet 1210, so that the second permanent magnet 1210 and the second load 2200 are combined into a rotor structure. By such an arrangement, the first rotor 1100 can cancel the design of the support structure for the first permanent magnet 1110 alone, and the second rotor 1200 can also cancel the design of the support structure for the second permanent magnet 1210 alone. Even it can be understood that the first rotor 1100 is the first permanent magnet 1110, and the second rotor 1200 is the second permanent magnet 1210. Compared with separately arranging a support structure to support the first permanent magnet 1110 and the second permanent magnet 1210, it is beneficial to simplify the structure and reduce the space occupied by the driving device 100, and is more conducive to the miniaturization design of the driving device 100.

[0071] The axial flux motor 1000 includes a first bearing 1510 and a second bearing 1520. The first bearing 1510 is fixedly connected to the first load 2100, so that the first permanent magnet 1110, the first bearing 1510 and the first load 2100 are combined together. The second bearing 1520 is fixedly connected to the second load 2200, so that the second permanent magnet 1210, the second bearing 1520 and the second load 2200 are combined together, which is beneficial to the compact design of the driving device 100 and further reduces the space occupied. The first permanent magnet 1110, the first bearing 1510 and the first load 2100 are combined to form a first structure, and the first structure can rotate through the first bearing 1510. The second permanent magnet 1210, the second bearing 1520 and the second load 2200 are combined to form a second structure, and the second structure can rotate through the second bearing 1520.

[0072] The first shaft body 1610 is supported by the housing 1400 and passes through the first bearing 1510, so as to realize the support for the first load 2100 and the first rotor 1100 (the first permanent magnet 1110). The second shaft body 1620 is supported by the housing 1400 and passes through the second bearing 1520, so as to realize the support for the second load 2200 and the second rotor 1200 (the second permanent magnet 1210). The first permanent magnet 1110, the first bearing 1510 and the first load 2100 are combined to form a first structure, and the second permanent magnet 1210, the second bearing 1520 and the second load 2200 are combined to form a second structure. The first bearing 1510 of the first structure is sleeved on the first shaft body 1610 for rotatable setting, and the second bearing 1520 of the second structure is sleeved on the second shaft body 1620 for rotatable setting.

[0073] It can be understood that the driving device 100 of the household appliance in this embodiment adopts the technical solution of the above embodiment, and thus has at least the beneficial effects brought by the technical solution of the above embodiment, which will not be repeated here.

[0074] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made under the concept of the present application by using the content of the specification and drawings of the present application, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A driving device (100), characterized in that, Comprising: An axial flux motor (1000), the axial flux motor (1000) comprising a housing (1400), a stator (1300), a first rotor (1100), a second rotor (1200), a first bearing (1510), a second bearing (1520), a first shaft body (1610) and a second shaft body (1620), the housing (1400) and the stator (1300) being injection-molded and connected, the stator (1300) being disposed between the first rotor (1100) and the second rotor (1200), the first rotor (1100) comprising a first permanent magnet (1110), the second rotor (1200) comprising a second permanent magnet (1210), the first shaft body (1610) being supported by the housing (1400) and passing through the first bearing (1510), the second shaft body (1620) being supported by the housing (1400) and passing through the second bearing (1520), and the first shaft body (1610) and the second shaft body (1620) being separated from each other; A first load (2100), the first load (2100), the first permanent magnet (1110) and the first bearing (1510) being fixedly connected to be rotatably disposed through the first bearing (1510); And A second load (2200), the second load (2200), the second permanent magnet (1210) and the second bearing (1520) being fixedly connected to be rotatably disposed through the second bearing (1520).

2. The drive device (100) according to claim 1, characterized in that, The housing (1400) and the first shaft body (1610) are injection-molded and connected; And / or, the housing (1400) and the second shaft body (1620) are injection-molded and connected.

3. The drive device (100) according to claim 2, characterized in that, The housing (1400) isolates the spaces on both sides of its axis, the first shaft body (1610) is disposed in the space on one axial side of the housing (1400), and the second shaft body (1620) is disposed in the space on the other axial side of the housing (1400).

4. The drive device (100) according to claim 1, characterized in that, The first load (2100) and the first permanent magnet (1110) are injection-molded and connected; And / or, the first load (2100) and the first bearing (1510) are injection-molded and connected.

5. The drive device (100) according to claim 4, characterized in that, The first load (2100) comprises a first part (2110) and a second part (2120), the first part (2110) and the second part (2120) are welded, and the second part (2120) and the first permanent magnet (1110), the first bearing (1510) are injection-molded and connected.

6. The drive device (100) according to claim 1, characterized in that, The second load (2200) and the second permanent magnet (1210) are injection-molded and connected; And / or, the second load (2200) and the second bearing (1520) are injection-molded and connected.

7. The drive device (100) according to claim 6, characterized in that, The second load (2200) comprises a third part (2210) and a fourth part (2220), the third part (2210) and the fourth part (2220) are welded, and the fourth part (2220) and the second permanent magnet (1210), the second bearing (1520) are injection-molded and connected.

8. The drive device (100) according to claim 1, characterized in that, The housing (1400) is provided with a first cavity (1410), the stator (1300) surrounds the first cavity (1410), and at least a part of the first bearing (1510) is embedded in the first cavity (1410); And / or, the housing (1400) is provided with a second cavity (1420), the stator (1300) surrounds the second cavity (1420), and a part of the second bearing (1520) is embedded in the second cavity (1420).

9. The drive device (100) according to claim 1, characterized in that, The first load (2100) is adapted to drive fluid flow; And / or, the second load (2200) is adapted to drive fluid flow.

10. The drive device (100) according to claim 9, characterized in that, The first load (2100) is an impeller; And / or, the second load (2200) is an impeller.

11. The drive device (100) according to claim 9, characterized in that, The first load (2100) is a centrifugal impeller; And / or, the second load (2200) is a centrifugal impeller.

12. A household appliance, characterized in that, Comprising the drive device (100) according to any one of claims 1 to 11.

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