CN111219360B

CN111219360B - Wind wheel device and household appliance

Info

Publication number: CN111219360B
Application number: CN201811438498.4A
Authority: CN
Inventors: 傅程
Original assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Priority date: 2018-11-27
Filing date: 2018-11-27
Publication date: 2022-08-02
Anticipated expiration: 2038-11-27
Also published as: CN111219360A

Abstract

The invention discloses a wind wheel device and a household appliance, wherein the wind wheel device comprises a cross-flow wind wheel, a motor, a mounting seat and a limiting structure; one end of the cross-flow wind wheel is provided with a rotating shaft, and the other end of the cross-flow wind wheel is provided with a shaft sleeve; the mounting seat is provided with a shaft hole, and the rotating shaft is inserted in the shaft hole; the motor is provided with a motor shaft, and the motor shaft is inserted into the shaft hole; the limiting structure is provided with a limiting state for limiting the cross-flow wind wheel between the mounting seat and the motor and an unlocking state for releasing the limiting state, the rotating shaft can move in the axial direction of the rotating shaft in the shaft hole in the unlocking state, the moving stroke of the rotating shaft in the direction far away from the motor is s, the depth of the motor shaft inserted into the shaft hole is d, and s is larger than or equal to d. The wind wheel device can simplify the disassembling process of the cross-flow wind wheel and reduce the disassembling difficulty greatly.

Description

Wind wheel device and household appliance

Technical Field

The invention relates to the technical field of household appliances, in particular to a wind wheel device and a household appliance.

Background

At present, wind wheel devices are installed in a plurality of household appliances, each wind wheel device comprises an installation seat, a cross-flow wind wheel and a motor, and the motors are used for driving the cross-flow wind wheels to rotate so as to achieve the purpose of air supply, such as common tower fans, household appliances, air purifiers and the like. After the household appliance is used for a long time, a large amount of dust is accumulated on the cross-flow wind wheel, and when the household appliance works, the dust on the cross-flow wind wheel is easily blown to a user, so that the experience of the user on a product is greatly reduced. For this reason, the cross-flow wind wheel needs to be designed to be detachable so as to be convenient for cleaning the cross-flow wind wheel. However, both ends of the conventional cross-flow wind wheel are respectively connected with the mounting seat and the motor, the limiting structure of the conventional cross-flow wind wheel is complex, when the conventional cross-flow wind wheel is disassembled, the mounting seat needs to be disassembled firstly to reserve a space for the subsequent axial movement of the cross-flow wind wheel, then the limiting structure for connecting the cross-flow wind wheel and the motor is disassembled, and finally the cross-flow wind wheel is axially drawn out to be separated from the motor. Obviously, the operation process is more tedious and the disassembly difficulty is large.

Disclosure of Invention

The invention mainly aims to provide a wind wheel device, aiming at simplifying the disassembling process of a cross-flow wind wheel and reducing the disassembling difficulty.

In order to achieve the purpose, the invention provides a wind wheel device which comprises a cross-flow wind wheel, a motor, a mounting seat and a limiting structure, wherein the cross-flow wind wheel is arranged on the cross-flow wind wheel; one end of the cross-flow wind wheel is provided with a rotating shaft, and the other end of the cross-flow wind wheel is provided with a shaft sleeve; the mounting seat is provided with a shaft hole, and the rotating shaft is inserted in the shaft hole; the motor is provided with a motor shaft, and the motor shaft is inserted into the shaft sleeve; the limiting structure is provided with a limiting state for positioning the cross-flow wind wheel between the mounting seat and the motor and an unlocking state for releasing the limiting state, the rotating shaft can move in the axial direction of the rotating shaft in the shaft hole in the unlocking state, the moving stroke of the rotating shaft in the direction far away from the motor is s, the depth of the motor shaft inserted into the shaft hole is d, and s is larger than or equal to d.

Preferably, the mounting seat comprises a mounting bracket and a bearing mounted on the mounting bracket, the shaft hole is arranged on the bearing, and the shaft hole is a through hole penetrating through the bearing; or the shaft hole is a blind hole, and the depth of the shaft hole is larger than the moving stroke of the rotating shaft.

Preferably, the limiting structure comprises a soft magnetic core and an electromagnet, and the soft magnetic core is installed in the shaft hole and is relatively fixed with the shaft sleeve in the axial direction of the shaft hole; the electromagnet is sleeved outside the shaft sleeve, and after the electromagnet is electrified, the soft magnetic core is connected with the motor shaft in a magnetic adsorption manner.

Preferably, a through hole penetrates through an end plate of the cross-flow wind wheel, and the through hole is communicated with a shaft hole of the shaft sleeve; the soft magnetic core comprises a magnetic core column and a cap body located at one end of the magnetic core column, the magnetic core column extends into the shaft hole from the through hole to be connected with the motor shaft in a magnetic adsorption mode, and the cap body is abutted to the outer hole edge of the through hole.

Preferably, the electromagnet is provided with a sleeve hole which is sleeved on the sleeve, and the inner wall of the sleeve hole is provided with a key groove; the outer wall surface of the shaft sleeve is convexly provided with a positioning key, and the positioning key is clamped and positioned with the key groove.

Preferably, the limiting structure further comprises an adaptor, wherein the adaptor comprises a rotating ring and a fixing ring which are arranged in an inner ring sleeve and an outer ring sleeve; the fixing ring is arranged on the motor and is connected with a power supply; the rotating ring is sleeved on the motor shaft so as to be driven by the motor shaft to rotate, and the rotating ring is electrically communicated with the fixing ring and the electromagnet.

Preferably, the outer wall surface of the fixing ring is convexly provided with a mounting lug, and the mounting lug is fixedly connected with the end surface of the motor.

Preferably, the rotating ring is provided with a connecting female end, and the electromagnet is connected with the connecting female end in an inserting mode through a lead.

The invention also provides a household appliance, which comprises a shell and the wind wheel device, wherein the shell is provided with an air outlet, the wind wheel device is arranged in the shell, and the wind wheel device is used for supplying air to the air outlet. The wind wheel device comprises a cross flow wind wheel, a motor, a mounting seat and a limiting structure; the cross-flow wind wheel comprises a cross-flow wind wheel body, a shaft sleeve, a rotating shaft and a wind collecting pipe, wherein the shaft sleeve is installed at one end of the cross-flow wind wheel body, and the rotating shaft is arranged at the other end of the cross-flow wind wheel body; the mounting seat is provided with a shaft hole, and the rotating shaft is inserted in the shaft hole; the motor is provided with a motor shaft, and the motor shaft is inserted into the shaft sleeve; the limiting structure is provided with a limiting state for positioning the cross-flow wind wheel between the mounting seat and the motor and an unlocking state for releasing the limiting state, the rotating shaft can move in the axial direction of the rotating shaft in the shaft hole in the unlocking state, the moving stroke of the rotating shaft in the direction far away from the motor is s, the depth of the motor shaft inserted into the shaft hole is d, and s is larger than or equal to d.

Preferably, the household appliance is a tower fan, or a household appliance, or an air purifier.

According to the technical scheme, the cross-flow wind wheel is designed to be movable along the axial direction of the cross-flow wind wheel, the movable stroke of the cross-flow wind wheel towards the direction far away from the motor is S, the depth of the motor inserted into the shaft hole is greater than or equal to d, so that when the cross-flow wind wheel needs to be disassembled, the cross-flow wind wheel is moved towards the direction far away from the motor until a shaft sleeve of the cross-flow wind wheel is completely separated from a motor shaft, an external force is applied to enable the shaft sleeve to deviate from the motor shaft, then the cross-flow wind wheel is pulled in the reverse direction, the cross-flow wind wheel is pulled out from the mounting seat, and the disassembly of the cross-flow wind wheel is completed. When the cross-flow wind wheel is assembled, the operation is reversed, after the cross-flow wind wheel is connected with the motor, the shaft sleeve of the cross-flow wind wheel and the motor shaft are detachably connected through the limiting structure, or the shaft hole of the mounting seat is plugged, so that the cross-flow wind wheel cannot move along the circumferential direction easily, and at the moment, the cross-flow wind wheel is opened, can normally rotate and cannot move along the axial direction to accidentally fall off.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic view of a wind turbine apparatus according to an embodiment of the present invention in a restrained state;

FIG. 2 is a schematic view of the wheel assembly of FIG. 1 in an unlocked position;

FIG. 3 is a schematic view of the cross flow wind wheel, the mounting base and the motor in FIG. 1;

figure 4 is a schematic structural view of another embodiment of a wind turbine apparatus according to the present invention;

FIG. 5 is an exploded view of yet another embodiment of the impeller device of FIG. 1;

FIG. 6 is an exploded isometric view of a portion of the impeller device of FIG. 5;

FIG. 7 is a schematic diagram of the structure of the soft magnetic core defining the structure of FIG. 6;

FIG. 8 is a schematic diagram of the electromagnet of the configuration defined in FIG. 6;

fig. 9 is a schematic structural view of an adaptor of the structure defined in fig. 6.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention discloses a wind wheel device which can simplify the disassembling process of a cross-flow wind wheel and reduce the disassembling difficulty so as to be convenient for a user to disassemble the wind wheel for cleaning. Note that in the description of the present invention, in fig. 1 to 9, solid arrows indicate structures such as spaces, grooves, holes, and the like.

Referring to fig. 1 to 3, in an embodiment of a wind wheel device 10 according to the present invention, the wind wheel device 10 includes a cross-flow wind wheel 100, a mounting seat 200, a motor 300, and a limiting structure 400; wherein, one end of the cross-flow wind wheel 100 is provided with a shaft sleeve 120, and the other end of the cross-flow wind wheel 100 is provided with a rotating shaft 110; the mounting base 200 is provided with a shaft hole 221, and the rotating shaft 110 is inserted into the shaft hole 221; the motor 300 has a motor shaft 310, the motor shaft 310 is inserted into the bushing 110; the limiting structure 400 has a limiting state for limiting the cross flow wind wheel 100 between the mounting seat 200 and the motor 300, and an unlocking state for releasing the limiting state, in the unlocking state, the rotating shaft 110 is movable in the shaft hole 221 along the axial direction thereof, the moving stroke of the rotating shaft 110 towards the direction far away from the motor 300 is s, and the depth of the motor shaft 310 inserted into the shaft sleeve 110 is d, wherein s is larger than or equal to d.

Specifically, cross-flow wind wheel 100 includes the wind wheel main part and is located the end plate at wind wheel main part both ends (two the end plate is first end plate and second end plate respectively), wherein, first end plate is equipped with pivot 110, first end plate and mount pad 200 interval set up, the interval between first end plate and the mount pad 200 is more than or equal to pivot 110's removal stroke s. The second end plate is provided with a bushing 120, and the bushing 120 has a shaft hole 121 for inserting the motor shaft 310.

When the cross-flow wind wheel 100 is assembled, the rotating shaft 110 of the cross-flow wind wheel 100 is connected with the mounting seat 200, the shaft sleeve 120 of the cross-flow wind wheel 100 is connected with the motor 300, and finally the limiting structure 400 is adjusted to be in a limiting state so as to limit the cross-flow wind wheel 100 between the mounting seat 200 and the motor 300, the axial movement of the cross-flow wind wheel 100 is limited, and at the moment, the cross-flow wind wheel 100 is started, so that the cross-flow wind wheel 100 can normally rotate and cannot accidentally fall off along the axial movement. For example, the limiting structure 400 may be a screw structure or a magnetic attraction structure, and the limiting structure 400 detachably connects the shaft sleeve 120 of the cross-flow wind wheel 100 and the motor shaft 310; alternatively, the limiting structure 400 is a plug structure or a plate structure, and the axial hole 221 of the mounting seat 200 can be sealed by the limiting structure 400, so that the axial movement of the cross-flow wind wheel 100 can be limited.

When the cross-flow wind wheel 100 is disassembled, the limiting structure 400 is adjusted to be in an unlocking state, then the cross-flow wind wheel 100 is moved towards the direction far away from the motor 300 until the shaft sleeve 120 of the cross-flow wind wheel 100 is completely separated from the motor shaft 310, finally, an external force is applied to the cross-flow wind wheel 100 to enable the shaft sleeve 120 to deviate from the motor shaft 310, and the cross-flow wind wheel 100 is pulled out from the mounting base 200, so that the cross-flow wind wheel 100 can be disassembled.

In view of the above, in the process of disassembling the cross-flow wind wheel 100, s is required to be greater than or equal to d if the shaft sleeve 120 of the cross-flow wind wheel 100 can be completely separated from the motor shaft 310. It should be noted that when s ═ d, after the shaft sleeve 120 is separated from the motor shaft 310, the end surface of the shaft sleeve 120 is just separated from the end surface of the motor shaft 310, and at this time, when the cross flow wind wheel 100 is drawn, there may be less interference between the end surface of the shaft sleeve 120 and the end surface of the motor shaft 310, and the shaft sleeve 120 may weaken the interference of the motor shaft 310 by deforming itself. Therefore, s > d is preferred to avoid the above interference problems.

According to the technical scheme, the cross-flow wind wheel 100 is designed to be movable along the axial direction of the cross-flow wind wheel 100 in an unlocking state, the moving stroke of the cross-flow wind wheel 100 towards the direction far away from the motor 300 is S, the depth of the cross-flow wind wheel 100 inserted into the shaft hole 121 is greater than or equal to d, when the cross-flow wind wheel 100 needs to be disassembled, the cross-flow wind wheel 100 is moved towards the direction far away from the motor 300 until the shaft sleeve 120 of the cross-flow wind wheel 100 is completely separated from the motor shaft 310, an external force is applied to enable the shaft sleeve 120 to deviate from the motor shaft 310, the cross-flow wind wheel 100 is pulled out from the mounting seat 200 in the reverse direction, the disassembly of the cross-flow wind wheel 100 is completed, the mounting seat 200 or the motor 300 does not need to be disassembled, and a user can disassemble the cross-flow wind wheel 100 to perform cleaning treatment conveniently. When the cross-flow wind wheel 100 is assembled, the operation is reversed, after the cross-flow wind wheel 100 is connected with the motor 300, the limiting structure 400 is used for limiting the cross-flow wind wheel 100 between the mounting seat 200 and the motor 300, so that the axial movement of the cross-flow wind wheel 100 can be limited, at the moment, the cross-flow wind wheel 100 is started, the cross-flow wind wheel 100 can normally rotate, and the accidental falling caused by the axial movement of the cross-flow wind wheel 100 can be avoided.

With reference to fig. 1 to fig. 3, regarding the structure of the mounting base 200, in the present embodiment, the mounting base 200 includes a mounting bracket 210 and a bearing 220 mounted on the mounting bracket 210, and a shaft hole 221 is disposed on the bearing 220. Since the shaft hole 221 is required for the rotating shaft 110 to move back and forth along the axial direction thereof, the shaft hole 221 may penetrate through the bearing 220 (i.e., the shaft hole 221 is a through hole), and the rotating shaft 110 may penetrate through the shaft hole 221 to realize the reciprocating motion. Alternatively, as shown in fig. 4, the shaft hole 221 is a blind hole, and the depth of the shaft hole 221 is h, h > s, so that the rotating shaft 110 is installed inside the shaft hole 221 to reciprocate.

Referring to fig. 1, 5 and 6, for the specific structure type of the limiting structure 400, the limiting structure 400 may be a screw structure or a pin structure, or a magnetic structure, as long as the tubular wind wheel 100 and the motor 300 are detachably connected. In this embodiment, the limiting structure 400 is a magnetic attraction structure through which the cross-flow wind wheel 100 and the motor shaft 310 are magnetically connected. Preferably, the limiting structure 400 includes a soft magnetic core 410 and an electromagnet 420, the soft magnetic core 410 being mounted in the shaft hole 121 of the shaft sleeve 120 and fixed in relation to the shaft sleeve 120 in an axial direction; the electromagnet 420 is sleeved outside the shaft sleeve 120, and after the electromagnet 420 is electrified, the soft magnetic core 120 is connected with the motor shaft 310 in a magnetic adsorption manner.

Specifically, the soft magnetic core 410 is made of a soft magnetic material, and commonly used soft magnetic materials are ferrite, silicon steel sheet, permalloy, and the like. The soft magnetic material can realize the conversion and transmission of magnetic conduction and electromagnetic energy in a magnetic field. When the electromagnet 420 is energized, a magnetic field can be generated such that the soft-magnetic core 410 is in the magnetic field environment of the electromagnet 420. Because the soft magnetic core 410 is made of soft magnetic materials, the soft magnetic core 410 can transmit the magnetic force of the electromagnet 420, so that the soft magnetic core 410 is in magnetic adsorption connection with the motor shaft 310, the motor shaft 310 generates reverse adsorption force to the soft magnetic core 410, the cross-flow wind wheel 100 and the motor 300 are stably connected, the cross-flow wind wheel 100 is difficult to axially move, and the cross-flow wind wheel 100 can normally rotate. When the electromagnet 420 is powered off, the magnetic field is removed, the soft magnetic core 410 is in the natural environment, the magnetic adsorption force between the soft magnetic core 410 and the motor 300 is removed, and at the moment, the cross-flow wind wheel 100 can be easily moved towards the direction far away from the motor 300, so that the cross-flow wind wheel 100 is detached, and the detachment difficulty is greatly reduced.

Referring to fig. 5 to 7, in order to prevent the soft magnetic core 410 from being separated from the shaft sleeve 120 under the reverse adsorption force generated by the motor shaft 310, a through hole communicated with the shaft hole 121 is formed through an end plate of the cross flow wind wheel 100; the soft magnetic core 410 comprises a core column 411 and a cap body 412 located at one end of the core column 411, the core column 411 extends into the shaft hole 121 from the through hole to be connected with the motor shaft 310 in a magnetic adsorption mode, and the cap body 412 is abutted to the outer hole edge of the through hole. When the cross-flow wind wheel 100 is in a working state, the motor shaft 310 has a tendency of pulling and holding the soft magnetic core 410 to move towards the motor 300, so that the cap 412 of the soft magnetic core 410 is tightly abutted against the outer hole edge of the through hole (i.e. the second end plate of the cross-flow wind wheel 100), and the soft magnetic core 410 and the motor shaft 310 are magnetically connected with each other stably, thereby effectively limiting the axial movement of the cross-flow wind wheel 100.

Referring to fig. 5 and 8, the connection and fixation manner of the electromagnet 420 and the shaft sleeve 120 is not limited, and may be a slot key structure, a snap structure, or a screw structure. In this embodiment, the electromagnet 420 has a hole 421 of the ring sleeve 120, and the inner wall of the hole 421 is provided with a key slot 422; the outer wall surface of the shaft sleeve 120 is convexly provided with a positioning key 122, and the positioning key 122 is clamped and positioned with the key slot 422 to play a role in transmitting torque.

Referring to fig. 1, 5, 6 and 9, it is further considered that, during the rotation of the cross-flow wind wheel 100, the electromagnets 420 rotate together with the cross-flow wind wheel 100, and the electromagnets 420 are connected to a power supply through wires, which are easily wound around the cross-flow wind wheel 100, based on the above embodiment. To avoid this, the limiting structure 400 further includes an adaptor 430, and the adaptor 430 includes a rotating ring 431 and a fixing ring 432 arranged in an inner and outer ring sleeve; wherein, the fixing ring 432 is installed on the motor 300, and the fixing ring 432 is connected with a power supply; the rotating ring 431 is sleeved on the motor shaft 310 in a sleeved mode, the rotating ring 431 is driven by the motor shaft 310 to rotate, and the rotating ring 431 is electrically communicated with the fixing ring 432 and the electromagnet 420.

Specifically, the fixed ring 432 is looped around the rotating ring 431, and the rotating ring 431 is rotatable with respect to the fixed ring 432. Here, the fixing ring 432 is mounted on an end surface of the motor 300, and the fixing ring 432 is connected to a power source through a wire (assumed as a first wire 434). The rotating ring 431 is sleeved on the motor shaft 310, the rotating ring 431 is electrically connected with the fixed ring 432, and the rotating ring 431 and the electromagnet 420 are connected through a lead (assumed as a second lead 423). When the motor 300 drives the cross-flow wind wheel 100 to rotate, the fixing ring 432 is fixed on the motor 300, so that the first conducting wire 434 is in a static state and cannot be wound; the rotating ring 431 rotates with the motor shaft 310, and the electromagnet 420 rotates in the same direction with the sleeve 120, so that the second wire 423 rotates integrally therewith, and thus the second wire 423 is not wound around the cross-flow wind wheel 100 or the motor shaft 310.

Referring to fig. 1, 6 and 9, in order to facilitate the connection between the electromagnet 420 and the rotating ring 431, it is preferable that a female connection end 4311 is provided on the rotating ring 431, and the electromagnet 420 is inserted into the female connection end 4311 via a wire (i.e., the second wire 423). When the wind wheel device 10 is disassembled, the second conducting wire 423 is pulled out from the connecting female end 4311, so that the soft magnetic core 410 and the electromagnet 420 can be disassembled together with the cross flow wind wheel 100, and the adaptor 430 can be retained on the motor 300.

The manner of connecting and fixing the fixing ring 432 and the motor 300 is not particularly limited. In one embodiment, the outer wall surface of the fixing ring 432 is convexly provided with a mounting lug 433, and the mounting lug 433 is fixedly connected with the end surface of the motor 300. Specifically, the mounting lug 433 is provided with a mounting opening, the motor 300 is provided with a screw hole corresponding to the mounting opening, and the mounting opening and the screw hole are fixedly connected through a screw 500.

The invention also provides a household appliance, the air conditioner comprises a shell and a wind wheel device 10, the shell is provided with an air outlet, the wind wheel device 10 is installed in the shell, and the wind wheel device 10 is used for supplying air to the air outlet. The specific structure of the wind wheel device 10 refers to the above embodiments, and since the household appliance adopts all technical solutions of all the above embodiments, all beneficial effects brought by the technical solutions of the above embodiments are also achieved, and are not described in detail herein.

In this embodiment, the household appliances are of various types, and may be a tower fan, an air conditioner, an air purifier, or other appliances requiring the wind wheel device 10. Wherein, for the tower fan, the wind wheel of the wind wheel device 10 is installed in the shell of the tower fan and is vertically placed. For the air conditioner, if the air conditioner is a floor type air conditioner indoor unit, the wind wheel of the wind wheel device 10 is installed in the shell of the floor type air conditioner indoor unit and is vertically placed; if the air conditioner is a wall-mounted air conditioner indoor unit, the wind wheel of the wind wheel device 10 is installed in the shell of the wall-mounted air conditioner indoor unit and is transversely placed. For the air purifier, the wind wheel of the wind wheel device 10 is installed in the casing of the air purifier and is vertically placed.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A wind wheel device, characterized in that the wind wheel device comprises:

one end of the cross-flow wind wheel is provided with a rotating shaft, and the other end of the cross-flow wind wheel is provided with a shaft sleeve;

the mounting seat is provided with a shaft hole, and the rotating shaft is inserted in the shaft hole;

the motor is provided with a motor shaft, and the motor shaft is inserted into the shaft sleeve; and

the limiting structure is provided with a limiting state for limiting the cross flow wind wheel between the mounting seat and the motor and an unlocking state for releasing the limiting state, in the unlocking state, the rotating shaft can move in the shaft hole along the axial direction of the rotating shaft, the moving stroke of the rotating shaft in the direction far away from the motor is s, the depth of the motor shaft inserted into the shaft sleeve is d, and s is larger than or equal to d;

the confinement structure comprises a soft magnetic core and an electromagnet; the soft magnetic core is arranged in the shaft hole of the shaft sleeve and is relatively fixed with the shaft sleeve in the axial direction; the electromagnet is sleeved outside the shaft sleeve, and after the electromagnet is electrified, the soft magnetic core is connected with the motor shaft in a magnetic adsorption manner.

2. The wind turbine device according to claim 1, wherein the mounting base includes a mounting bracket and a bearing mounted on the mounting bracket, the shaft hole is provided in the bearing, and the shaft hole is a through hole penetrating through the bearing; or the shaft hole is a blind hole, the depth of the shaft hole is h, and h is larger than s.

3. The wind wheel device according to claim 1, characterized in that a through hole is arranged through the end plate of the cross flow wind wheel, and the through hole is communicated with the shaft hole of the shaft sleeve; the soft magnetic core comprises a magnetic core column and a cap body located at one end of the magnetic core column, the magnetic core column extends into the shaft hole from the through hole to be connected with the motor shaft in a magnetic adsorption mode, and the cap body is abutted to the outer hole edge of the through hole.

4. The wind wheel device according to claim 1, characterized in that the electromagnet has a sleeve hole sleeved on the shaft sleeve, and the inner wall of the sleeve hole is provided with a key groove; the outer wall surface of the shaft sleeve is convexly provided with a positioning key, and the positioning key is clamped and positioned with the key groove.

5. The wind turbine device of claim 1 wherein the confining structure further comprises an adapter comprising a rotating ring and a stationary ring in an inner and outer annular ring arrangement; the fixing ring is arranged on the motor and is connected with a power supply; the rotating ring is sleeved on the motor shaft so as to be driven by the motor shaft to rotate, and the rotating ring is electrically communicated with the fixing ring and the electromagnet.

6. The wind turbine device according to claim 5, wherein the outer wall surface of the fixing ring is convexly provided with a mounting lug, and the mounting lug is fixedly connected with the end surface of the motor.

7. The wind turbine device according to claim 5, wherein the rotary ring is provided with a female connection end, and the electromagnet is connected with the female connection end in an inserting manner through a wire.

8. A household appliance, characterized in that the household appliance comprises a housing and a wind wheel device according to any one of claims 1 to 7, the housing is provided with an air outlet, the wind wheel device is mounted in the housing, and the wind wheel device is used for supplying air to the air outlet.

9. The household appliance according to claim 8, wherein the household appliance is a tower fan, or an air conditioner, or an air purifier.