Motors, fans and household appliances

Abstract

The present invention provides a motor, a fan, and a household appliance including the motor. The motor includes a housing, a shaft assembly, a rotor assembly, and a stator assembly. The housing has a front end and a rear end arranged opposite each other. The shaft assembly includes a first shaft, a second shaft, and a first bearing. The first shaft is hollow and sleeved on the outside of the second shaft. The first bearing is arranged between the inner circumference of the first shaft and the outer circumference of the second shaft. The rotor assembly is arranged inside the housing. The rotor assembly includes a first rotor and a second rotor. The first rotor and the second rotor are respectively sleeved on the first shaft and the second shaft. The stator assembly is fixed inside the housing. The stator assembly includes a first stator and a second stator. The first stator and the second stator are respectively sleeved on the outside of the first rotor and the second rotor. In this way, the present invention solves the problem of oversized motors in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a motor, a fan including the motor, and a household appliance including the fan. Background Art

[0002] As the demand for quality of life continues to improve, more functional requirements are being placed on motors. For example, dual-axis output motors have two output shafts extending in the same direction or in opposite directions. However, existing dual-axis output motor solutions use a nested arrangement of inner and outer rotor motors, that is, two separate motors are used to drive the two nested output shafts. This arrangement results in low structural reliability of the motor, as well as large size, which limits its application scenarios. In other words, the existing dual-axis output motors have the problem of being large in size. Summary of the Invention

[0003] The present invention provides a motor, a fan including the motor, and a household appliance including the fan, aiming to solve the problem of large size of dual-axis output motors in the prior art.

[0004] To solve the above problems, the present invention proposes a motor, which includes a housing, a rotating shaft assembly, a rotor assembly and a stator assembly, wherein the housing has a front end and a rear end arranged relatively to each other; the rotating shaft assembly includes a first rotating shaft, a second rotating shaft and a first bearing, the first rotating shaft is hollow, and the first rotating shaft is sleeved on the outside of the second rotating shaft, and the first bearing is arranged between the inner periphery of the first rotating shaft and the outer periphery of the second rotating shaft; the rotor assembly is arranged inside the housing, the rotor assembly includes a first rotor and a second rotor, the first rotor and the second rotor are respectively sleeved on the first rotating shaft and the second rotating shaft; the stator assembly is fixed inside the housing, the stator assembly includes a first stator and a second stator, the first stator and the second stator are respectively sleeved on the outside of the first rotor and the second rotor.

[0005] In an optional embodiment, the front end of the second rotating shaft extends from the front end of the first rotating shaft, and the first bearing is arranged at the front end of the first rotating shaft.

[0006] In an optional embodiment, the first rotating shaft includes a first sleeve and a second sleeve, the rear end of the first sleeve is sleeved on the front end of the second sleeve, the first sleeve is arranged outside the shell, and the front end of the second sleeve extends from the shell and enters the first sleeve.

[0007] In an optional embodiment, the first sleeve and the second sleeve are detachably connected or integrally provided.

[0008] In an optional embodiment, the motor further includes a second bearing, wherein the second bearing is sleeved on the first rotating shaft, and the second bearing is arranged between the first rotor and the second rotor.

[0009] In an optional embodiment, the motor further includes a third bearing, wherein the third bearing is sleeved on the first rotating shaft and is disposed between the housing and the first rotor.

[0010] In an optional embodiment, the motor further includes a fourth bearing, wherein the fourth bearing is sleeved on the second rotating shaft and is disposed between the housing and the second rotor.

[0011] In an optional embodiment, the housing includes a front end cover, a rear end cover and a shell body, and the front end cover and the rear end cover are respectively arranged at both ends of the shell body, wherein a second bearing chamber for accommodating the second bearing is formed in the shell body; or, the motor also includes a protective shell, the second bearing chamber is formed in the protective shell, and the protective shell is fixedly connected to the shell body.

[0012] In an optional embodiment, the shell body is made of plastic, and the first stator, the second stator and the shell body are integrally injection molded; or, the shell body includes a first shell body and a second shell body, the first stator and the second stator are respectively integrally injection molded with the first shell body and the second shell body, and the first shell body and the second shell body are detachably connected.

[0013] In an optional embodiment, the shell body is made of metal, and the shell body includes a first shell body and a second shell body. The first stator and the second stator are fixed to the first shell body and the second shell body respectively, and the first shell body and the second shell body are integrally arranged or detachably connected.

[0014] The present invention also provides a fan, comprising the motor as described above.

[0015] In an optional embodiment, the fan includes a first fan and a second fan, the first fan is connected to the first rotating shaft, and the second fan is connected to the second rotating shaft.

[0016] The present invention further provides a household appliance, comprising the fan described above.

[0017] The present invention provides a motor, a fan including the motor, and a household appliance including the fan. Specifically, the motor housing includes a first stator, a second stator, and corresponding first and second rotors. The first and second stators are respectively sleeved onto the exterior of the first and second rotors, thereby reducing the axial dimension of a motor with two output shafts. This solves the problem of large axial dimensions in conventional dual-shaft motors. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 is a cross-sectional view of a first embodiment of the motor of the present invention;

[0020] Figure 2 for Figure 1 Exploded view of the motor;

[0021] Figure 3 is a cross-sectional view of a second embodiment of a motor according to the present invention;

[0022] Figure 4 is a cross-sectional view of a third embodiment of a motor according to the present invention;

[0023] Figure 5 is a cross-sectional view of a fourth embodiment of a motor according to the present invention;

[0024] Figure 6 Schematic diagram of the structure of the first embodiment of the rotor of the present invention;

[0025] Figure 7 is a schematic structural diagram of a second embodiment of a rotor of the present invention;

[0026] Figure 8 Schematic diagram of the structure of an embodiment of the motor of the present invention.

[0027] Description of Figure Numbers:

[0028]

[0029]

[0030] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] As living standards continue to improve, more functional requirements are being placed on motors. For example, a dual-axis output motor is sometimes required. Specifically, such a dual-axis output motor has two output shafts extending in the same direction or in opposite directions. However, existing dual-axis output motor solutions suffer from drawbacks such as large size and low reliability. Specifically, existing dual-axis output motors employ a nested arrangement of inner and outer rotor motors, using two separate motors to drive the two nested output shafts. This arrangement results in low structural reliability and large size, limiting its application scenarios. Furthermore, existing dual-axis output motors with radial flux and same-side dual output technology also employ a single-axis motor with a transmission mechanism such as gears, with the two output shafts rotating at a fixed speed ratio and direction. This arrangement results in the two output shafts not moving independently but rather interfering with each other, failing to meet diverse usage requirements. Furthermore, transmission mechanisms such as gears generate considerable noise during operation, impacting the user experience.

[0035] See also Figure 1 、 Figure 2 To solve the above problems, the present invention proposes a motor 100. The motor 100 includes a housing 11, a rotating shaft assembly, a rotor assembly, and a stator assembly. The housing 11 has a front end and a rear end arranged opposite to each other. The rotating shaft assembly includes a first rotating shaft 121, a second rotating shaft 122, and a first bearing 151. The first rotating shaft 121 is hollow and is sleeved on the outside of the second rotating shaft 122. The first bearing 151 is arranged between the inner circumference of the first rotating shaft 121 and the outer circumference of the second rotating shaft 122. The rotor assembly is arranged inside the housing 11. The rotor assembly includes a first rotor 131 and a second rotor 132, and the first rotor 131 and the second rotor 132 are sleeved on the first rotating shaft 121 and the second rotating shaft 122 respectively. The stator assembly is fixed inside the housing 11, and the stator assembly includes a first stator 141 and a second stator 142. The first stator 141 and the second stator 142 are respectively sleeved on the outside of the first rotor 131 and the second rotor 132 .

[0036] Specifically, the first rotor 131 and the first stator 141 form a first drive system, and the second rotor 132 and the second stator 142 form a second drive system. The present invention integrates the first drive system and the second drive system into a housing 11. Compared with the solution of using two independent motor 100 drive systems, that is, compared with the solution of nesting the inner and outer rotor motors 100, the size of the motor 100 proposed by the present invention is significantly reduced. Furthermore, at the same time, in the motor 100 proposed by the present invention, the first drive system and the second drive system are independent of each other. That is, the movements of the first rotating shaft 121 and the second rotating shaft 122 are relatively independent, and the two do not need to adopt a fixed speed ratio or direction. Compared with the motor 100 in the prior art that uses a gear transmission mechanism to achieve dual-axis output, the motor 100 proposed by the present invention can be applied in a wider range of scenarios and can meet diverse usage needs.

[0037] In this embodiment, the first stator 141 and the second stator 142 are respectively sleeved outside the first rotor 131 and the second rotor 132. Furthermore, the first stator 141 and the second stator 142 are also hollow structures. The first rotor 131 and the second rotor 132 are respectively coaxially arranged with the first stator 141 and the second stator 142. A radial air gap exists between the first rotor 131 and the first stator 141, and between the second rotor 132 and the second stator 142. This arrangement reduces the axial dimension of the motor 100.

[0038] On the basis of the previous embodiment, the first rotating shaft 121 is hollow and is sleeved on the second rotating shaft 122. Both ends of the second rotating shaft 122 need to extend from the first rotating shaft 121. With this arrangement, the length of the second rotating shaft 122 will be greater than the rotating shaft length of the conventional motor 100 in the prior art. Since the length of the second rotating shaft 122 has increased, the support stiffness of the second rotating shaft 122 also needs to be increased accordingly. There are two technical solutions to improve the support stiffness of the second rotating shaft 122. Increase the shaft diameter of the second rotating shaft 122 or reasonably arrange the support points for supporting the second rotating shaft 122. If the solution of increasing the shaft diameter of the second rotating shaft 122 is adopted, the outer diameter of the first rotating shaft 121 and the dimensions of other structures such as bearings will be increased accordingly. This is not conducive to the overall miniaturization of the motor 100, nor is it conducive to reducing the manufacturing cost of the motor 100.

[0039] Therefore, the present invention sets a support point between the first rotating shaft 121 and the second rotating shaft 122. The support point can be a bearing or other feasible rotating support member. In an optional embodiment, the support point is a first bearing 151. The first bearing 151 is arranged between the inner circumferential wall of the first rotating shaft 121 and the inner circumferential wall of the second rotating shaft 122. Specifically, the inner periphery of the first bearing 151 is sleeved on the second rotating shaft 122, and the outer periphery of the first bearing 151 is connected to the first rotating shaft 121. Specifically, the support point is set between the inner circumferential wall of the first rotating shaft 121 and the outer circumferential wall of the second rotating shaft 122, which increases the axial dimension that can effectively compress the entire motor 100. At the same time, such a setting increases the support stiffness of the second rotating shaft 122, and can ensure that the rear end of the second rotating shaft 122 extends out of the first rotating shaft 121 by a sufficient length, thereby ensuring that the support point of the second rotor 132 has a sufficient span. Furthermore, the length of the front end of the second rotating shaft 122 extending from the front end of the first rotating shaft 121 needs to be as short as possible, so as to improve the supporting rigidity of the entire rotating shaft assembly.

[0040] See also Figure 2In another optional embodiment, the motor 100 further includes a second bearing 152, a third bearing 153, and a fourth bearing 154. The second bearing 152 and the third bearing 153 are both mounted on the first rotating shaft 121. The fourth bearing 154 is mounted on the second rotating shaft 122. Specifically, the fourth bearing 154 is mounted on the portion of the rear end of the second rotating shaft 122 that extends beyond the first rotating shaft 121. The second bearing 152 is disposed between the first rotor 131 and the second rotor 132, the third bearing 153 is disposed between the front end of the housing 11 and the first rotor 131, and the fourth bearing 154 is disposed between the second rotor 132 and the rear end of the housing 11. Specifically, the inner circumferences of the second bearing 152 and the third bearing 153 are mounted on the first rotating shaft 121, while their outer circumferences are fixedly connected to the housing 11. The inner circumference of the fourth bearing is mounted on the second rotating shaft 122, while its outer circumference is fixedly connected to the housing 11.

[0041] Specifically, the second bearing 152 and the third bearing 153 are respectively arranged on both axial sides of the first rotor 131, providing double-end support for the first rotor 131, thereby improving the support stiffness of the first rotor 131. The first bearing 151 is arranged on the second rotating shaft 122, and the fourth bearing 154 is arranged between the second rotor 132 and the rear end of the housing 11. In other words, the second rotating shaft 122 and the second rotor 132 together constitute the second rotor 132 system. The first bearing 151 and the fourth bearing 154 are respectively used to support the two ends of the second rotor 132 system to improve the rotational stability of the second rotor 132 system. Furthermore, the provision of the first, second, third, and fourth bearings 154 improves the overall support stiffness of the rotating shaft assembly, making the structure of the motor 100 more stable and reliable.

[0042] Based on the previous embodiment, the first, second, third, and fourth bearings 154 can be sliding bearings, sliding shafts, magnetic bearings, or air bearings, etc., which have a rotational support effect. In an optional embodiment, the first bearing 151 is a sliding bearing. Sliding bearings have the characteristics of small radial space and large supporting load. Moreover, during installation, there is no need to change the outer diameter of the second rotating shaft 122, which helps reduce manufacturing costs. The second bearing 152, the third bearing 153, and the fourth bearing 154 can be ball bearings. Ball bearings are a type of rolling bearing. The ball is installed between the inner and outer steel rings and can withstand large loads. They are also called ball bearings. Ball bearings are a relatively common bearing, and using ball bearings helps reduce manufacturing costs.

[0043] In an optional embodiment, in order to accommodate the first, second, third and fourth bearings 154, the housing 11 also has a corresponding structural design. The housing 11 includes a front end cover 111, a rear end cover 113 and a shell body 112. The front end cover 111 and the rear end cover 113 are respectively arranged at the two ends of the shell body 112. Furthermore, the front end cover 111 includes a protective cover 111a, a packaging cover 111b and a front bearing chamber 111c from the outside to the inside. The front bearing chamber 111c is used to accommodate the third bearing 153, and the front bearing chamber 111c is provided with a through hole for the rotating shaft to pass through. The rear end cover 113 is also provided with a rear bearing chamber for accommodating the fourth bearing 154.

[0044] In an optional embodiment, the motor 100 further includes a protective housing 114 to accommodate the second bearing 152. The second bearing 152 is housed within the protective housing 114. The protective housing 114 is secured within the housing 11. In another optional embodiment, the protective housing 114 may be omitted, and a corresponding hollow portion may be provided directly within the housing 112, with the second bearing 152 secured within the hollow portion.

[0045] See also Figure 3 In an optional embodiment, the front end of the second rotating shaft 122 extends from the front end of the first rotating shaft 121, and the first bearing 151 is arranged at the front end of the first rotating shaft 121. Optionally, the first rotating shaft 121 adopts a through shaft and the second rotating shaft 122 adopts a seamless steel pipe. This arrangement can reduce the cutting allowance during processing and reduce manufacturing costs. Furthermore, the first bearing 151 is arranged close to the front end of the second rotating shaft 122. This arrangement can ensure that the length of the front end of the second rotating shaft 122 extending from the front end of the first rotating shaft 121 is as short as possible, thereby improving the support stiffness of the entire rotating shaft assembly.

[0046] In an optional embodiment, the inner bore of the first rotating shaft 121 includes a first hole segment and a second hole segment, arranged sequentially from the front end to the rear end. The diameter of the first hole segment is larger than the diameter of the second hole segment, and the first bearing 151 is disposed within the first hole segment. This arrangement eliminates the need to change the outer diameter of the first rotating shaft 121 when installing the first bearing 151, thereby reducing manufacturing costs.

[0047] See also Figure 3In an optional embodiment, the first rotating shaft 121 includes a first sleeve and a second sleeve. The rear end of the first sleeve is sleeved over the front end of the second sleeve. The first sleeve is disposed outside the housing 11, and the front end of the second sleeve extends from the housing 11 and enters the first sleeve. Furthermore, the diameter of the first sleeve is larger than that of the second sleeve. Optionally, the first bearing 151 is a rolling bearing, which has high rotational precision. Rolling bearings are preferred in certain applications requiring high rotational speeds or high rotational precision. However, the radial dimensions of rolling bearings are larger than those of sliding bearings. Using a rolling bearing for the first bearing 151 increases the outer diameter of the first rotating shaft 121, thereby increasing the specifications of the second bearing 152 and the third bearing 153. This is detrimental to reducing manufacturing costs and axial height. Therefore, the present invention provides a first rotating shaft 121 comprising a first sleeve and a second sleeve, with the outer diameter of the first sleeve being larger than that of the second sleeve. The first bearing 151 is mounted on the first sleeve, while the second bearing 152 and the third bearing 153 are mounted on the second sleeve. Thus, the first and second sleeves can accommodate the inner diameters of different bearings, which helps reduce the manufacturing cost of the motor 100 while further reducing the size of the motor 100.

[0048] In an optional embodiment, the first sleeve 121a and the second sleeve 121b can be detachably connected or integrally formed. To further reduce costs, the first sleeve 121a and the second sleeve 121b can be made of two seamless steel pipes of different specifications. The two seamless steel pipes of different specifications can be detachably connected or integrally formed. The cost of detachably connecting the two steel pipes is lower.

[0049] In an optional embodiment, the housing 11 includes a front end cover 111, a rear end cover 113 and a shell body, wherein the front end cover 111 and the rear end cover 113 are respectively arranged at both ends of the shell body, wherein a second bearing chamber for accommodating the second bearing 152 is formed in the shell body; or, the motor 100 further includes a protective shell 114, wherein the second bearing chamber is formed in the protective shell 114, and the protective shell 114 is fixedly connected to the shell body. Specifically, the provision of the second bearing chamber brings technical difficulties to the processing of the shell body. This makes the overall cross-section of the shell body present an I-shaped structure, and a simple cylindrical structure cannot be adopted. Furthermore, the second bearing chamber can be directly formed by processing on the shell body, or the second bearing chamber can be formed in the protective shell 114, and the protective shell 114 and the shell body are integrally connected.

[0050] In an optional embodiment, the shell body is made of plastic, and the first stator 141, the second stator 142 and the shell body are integrally injection molded; or, the shell body includes a first shell body 112a and a second shell body 112b, and the first stator 141 and the second stator 142 are respectively correspondingly integrally injection molded with the first shell body 112a and the second shell body 112b, and the first shell body 112a and the second shell body 112b are detachably connected. Specifically, the first shell body 112a and the second shell body 112b are made of a single piece of plastic material, that is, they are a whole, and the first stator 141 and the second stator 142 are integrally injection molded with the shell body, please refer to Figure 1 The mold manufacturing of this structural one-piece shell is difficult, but the assembly process is simple;

[0051] In another optional embodiment, the first housing 112a and the second housing 112b are both made of plastic material, but the first housing 112a and the first stator 141141 are integrally injection molded; the second housing 112b112b and the second stator 142142 are integrally injection molded, and then the first and second housings 112b are assembled together. Figure 4 This type of structural mold is easy to manufacture and the assembly process is relatively simple, but the assembly accuracy is not easy to guarantee.

[0052] In an optional embodiment, the material of the shell body is metal, and the shell body includes a first shell body 112a and a second shell body 112b. The first stator 141 and the second stator 142 are fixed to the first shell body 112a and the second shell body 112b respectively. The first shell body 112a and the second shell body 112b are integrated or detachably connected. Specifically, the first shell body 112a and the second shell body 112b are both made of metal materials. The two can be integral parts (i.e., integrated settings) or assembly parts (i.e., detachably connected). The integral parts have high precision and are difficult to process. The assembly parts have low processing difficulty and low assembly precision. The first stator 141 and the second stator 142 are fixedly connected to the first shell body 112a and the second shell body 112b respectively. The fixed connection method can be gluing or interference fit. This structure does not require opening a plastic mold and has good heat dissipation.

[0053] Based on the above embodiment, the second bearing chamber can be formed in the first housing body 112a, the second housing body 112b, or a single housing body formed by integrating the first and second housing bodies 112a, 112b. Alternatively, the second bearing chamber can be formed in the protective housing 114, which can be fixed in either the first housing body 112a or the second housing body 112b. This configuration reduces manufacturing difficulty.

[0054] See also Figure 6 , Figure 6 This is the first embodiment of the rotor proposed in the present invention. In this first embodiment of the rotor structure, the first rotor 131 or the second rotor 132 comprises a rotor core 13a and a plurality of permanent magnets 13b, each of which is a magnetic steel. The magnetic steel is evenly arranged radially outward of the rotor core 13a along the circumference of the rotor core 13a. The magnetic steel and the first stator 141 or the second stator 142 are radially opposed to each other, forming a radial air gap.

[0055] See also Figure 7 , Figure 7 This is the second embodiment of the rotor proposed by the present invention. In this second embodiment of the rotor structure, the first rotor 131 or the second rotor 132 includes a rotor core 13a, multiple permanent magnets 13b (i.e., magnetic steel), and a plastic encapsulation body 13c. The rotor core 13a is axially evenly distributed with multiple rectangular parallelepiped slots extending radially along the rotor core 13a. The magnetic steel is roughly rectangular in shape and is accommodated in the rectangular parallelepiped slots. The plastic encapsulation body 13c is injection-molded together with the permanent magnets 13b and the rotor core 13a.

[0056] Based on the previous embodiment, both the first rotor 131 and the second rotor 132 may adopt the rotor structure of the first embodiment. Alternatively, both the first rotor 131 and the second rotor 132 may adopt the rotor structure of the second embodiment. Alternatively, the first rotor 131 and the second rotor 132 may adopt different rotor structures, namely, the first rotor 131 may adopt the structure described in the first embodiment or the second embodiment, while the second rotor 132 may adopt the structure described in another embodiment. In addition to the first and second embodiments, the first rotor 131 and the second rotor 132 may also adopt various other different structures. In an optional embodiment, the first rotor 131 adopts the rotor structure described in the first embodiment. This configuration can reduce the impact of a larger shaft outer diameter on the magnetic circuit. The second rotor 132 adopts the rotor structure of the second embodiment. This configuration can increase power density and reduce axial space.

[0057] See also Figure 8 The present invention also provides a fan comprising the motor 100 described above. Since the motor 100 described above has two output shafts, the motor 100 is primarily applicable to dual-axis output motors 100. Furthermore, a fan utilizing the motor 100 described above also has advantages such as a small size and a reliable structure.

[0058] See also Figure 8In an optional embodiment, the fan includes a first fan 200 and a second fan 300. The first fan 200 is connected to the first rotating shaft 121, and the second fan 300 is connected to the second rotating shaft 122. Furthermore, the first fan 200 and the second fan 300 are connected to the output ends of the first rotating shaft 121 and the second rotating shaft 122, respectively. When the motor 100 is started, the first rotor 131 and the first stator 141 form a first drive system to drive the first fan 200, while the second rotor 132 and the second stator 142 form a second drive system to drive the second fan 300. Furthermore, although the first and second drive systems are both located within the housing 11, they are independent of each other, meaning that the movement of the first and second rotating shafts 121, 122 can be independently controlled. This arrangement enables independent selection of the first and second fans 200, 300. Depending on the application scenario, the first and second fans 200, 300 can have various motion modes, such as equal speed, differential speed, and reverse speed.

[0059] In an optional embodiment, the present invention further provides a household appliance. The household appliance may be an air conditioner, a sterilizer, a fan, or the like. The household appliance includes the aforementioned blower. The household appliance employing the aforementioned blower has advantages such as dual-axis output, compact structure, small footprint, and low manufacturing cost.

[0060] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A motor, characterized in that: include: a housing having a front end and a rear end; The rotating shaft assembly includes a first rotating shaft, a second rotating shaft, and a first bearing, wherein the first rotating shaft is hollow and sleeved on the outside of the second rotating shaft, and the first bearing is disposed between the inner periphery of the first rotating shaft and the outer periphery of the second rotating shaft; a rotor assembly disposed inside the housing, the rotor assembly comprising a first rotor and a second rotor, the first rotor and the second rotor being sleeved on the first rotating shaft and the second rotating shaft respectively; a stator assembly fixed inside the housing, the stator assembly comprising a first stator and a second stator, the first stator and the second stator being respectively sleeved on the outside of the first rotor and the second rotor; The first rotating shaft includes a first sleeve and a second sleeve, the rear end of the first sleeve is sleeved on the front end of the second sleeve, the first sleeve is arranged outside the shell, and the front end of the second sleeve extends from the shell and enters the first sleeve; the diameter of the first sleeve is larger than the diameter of the second sleeve; the motor also includes a second bearing, the outer periphery of the second bearing is fixed inside the shell, the inner periphery of the second bearing is sleeved on the first rotating shaft, and the second bearing is arranged between the first rotor and the second rotor.

2. The motor according to claim 1, wherein The front end of the second rotating shaft extends from the front end of the first rotating shaft, and the first bearing is arranged at the front end of the first rotating shaft.

3. The motor according to claim 2, characterized in that The first sleeve and the second sleeve are detachably connected or integrally provided.

4. The motor according to claim 1, wherein The motor further includes a third bearing, the outer periphery of the third bearing is fixed inside the housing, the inner periphery of the third bearing is sleeved on the first rotating shaft, and the third bearing is arranged between the front end of the housing and the first rotor.

5. The motor according to claim 4, characterized in that The motor further includes a fourth bearing, the outer periphery of the fourth bearing being fixed inside the housing, the inner periphery of the fourth bearing being sleeved on the second rotating shaft, and the fourth bearing being arranged between the rear end of the housing and the second rotor.

6. The motor according to any one of claims 1 to 5, characterized in that The housing comprises a front end cover, a rear end cover and a housing body, wherein the front end cover and the rear end cover are respectively arranged at two ends of the housing body, wherein a second bearing chamber for accommodating the second bearing is formed in the housing body; or The motor further includes a protective shell, the second bearing chamber is formed in the protective shell, and the protective shell is fixedly connected to the shell body.

7. The motor according to claim 6, characterized in that The shell is made of plastic. Wherein, the first stator, the second stator and the shell body are integrally injection molded; or, The shell body includes a first shell body and a second shell body. The first stator and the second stator are respectively correspondingly formed integrally with the first shell body and the second shell body by injection molding. The first shell body and the second shell body are detachably connected.

8. The motor according to claim 6, wherein The shell body is made of metal and includes a first shell body and a second shell body. The first stator and the second stator are fixed to the first shell body and the second shell body respectively. The first shell body and the second shell body are integrally arranged or detachably connected.

9. A fan, characterized in that: The fan comprises the motor according to any one of claims 1 to 8.

10. The fan according to claim 9, characterized in that The fan includes a first fan and a second fan, the first fan is connected to the first rotating shaft, and the second fan is connected to the second rotating shaft.

11. A household appliance, characterized in that: The household appliance comprises the fan according to any one of claims 9 to 10.

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