CN113137397B

CN113137397B - Air supply device

Info

Publication number: CN113137397B
Application number: CN202010063056.7A
Authority: CN
Inventors: 余勇; 郭润明; 胡坤
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: 2020-01-19
Filing date: 2020-01-19
Publication date: 2023-08-08
Anticipated expiration: 2040-01-19
Also published as: CN113137397A

Abstract

The invention discloses an air supply device, which comprises: a base; the machine body is arranged above the base; a bearing assembly disposed between the body and the base, the bearing assembly comprising: the first bearing piece and the second bearing piece are stacked in the gravity direction of the machine body, the first bearing piece and the second bearing piece can rotate relatively, the first bearing piece is fixed with the machine body, and the second bearing piece is fixed with the base. From this, through setting up bearing assembly, can reliably support the fuselage, when the fuselage rotates, can prevent that the fuselage from rocking to, this bearing assembly simple structure, convenient assembly can promote air supply arrangement's assembly efficiency.

Description

Air supply device

Technical Field

The invention relates to the field of household appliances, in particular to an air supply device.

Background

In the related art, the whole machine of the air supply device (bladeless fan) has larger mass, the machine body is easy to shake when the air supply device shakes the head for supplying air, and the bearing assembly of the air supply device has complex structure and is inconvenient to assemble, so that the assembly efficiency of the air supply device is low.

Disclosure of Invention

The present invention aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, an object of the present invention is to provide an air blower that can prevent the body from shaking when the body of the air blower rotates, and can also improve the assembly efficiency of the air blower.

The air supply device according to the present invention includes: a base; the machine body is arranged above the base; a bearing assembly disposed between the body and the base, the bearing assembly comprising: the first bearing piece and the second bearing piece are stacked in the gravity direction of the machine body, the first bearing piece and the second bearing piece can rotate relatively, the first bearing piece is fixed with the machine body, and the second bearing piece is fixed with the base.

According to the air supply device, the bearing assembly is arranged, so that the machine body can be reliably supported, the machine body can be prevented from shaking when the machine body rotates, and the bearing assembly is simple in structure and convenient to assemble, and the assembly efficiency of the air supply device can be improved.

In some examples of the invention, the bearing assembly is arranged coaxially with the fuselage.

In some examples of the invention, the radial dimension of the bearing assembly is close to the radial dimension of the fuselage.

In some examples of the invention, a plurality of rolling structures are sandwiched between the first bearing member and the second bearing member, and a radial distance between concentric circles on which the plurality of rolling structures are located and an outer circumferential edge of the body is smaller than a radial distance between the concentric circles and a rotation axis of the bearing assembly.

In some examples of the invention, the rolling structure is a ball.

In some examples of the invention, the second bearing member is provided with a reservoir in which a plurality of the rolling structures are located.

In some examples of the invention, a plurality of the rolling structures are spaced apart along the extension direction of the oil reservoir.

In some examples of the invention, the bearing assembly further comprises: the limiting support is arranged in the oil storage tank, and the rolling structure is arranged on the limiting support and is rotatable relative to the limiting support.

In some examples of the invention, the oil reservoir and the limit bracket are each configured in a ring shape.

In some examples of the present invention, the spacing bracket is provided with a rolling structure mounting hole penetrating the spacing bracket, and the rolling structure is provided in the rolling structure mounting hole.

In some examples of the present invention, an inner wall surface of the rolling structure mounting hole is arc-shaped in a thickness direction of the limit bracket.

In some examples of the present invention, in the thickness direction of the limiting bracket, diameters of two ends of the rolling structure mounting hole are D1, a diameter of a middle part of the rolling structure mounting hole is D2, and a diameter of the rolling structure is D3, which satisfies the relation: d2> D3> D1.

In some examples of the present invention, the first bearing member is sleeved outside an inner wall of the oil storage tank, and the first bearing member is rotatable relative to the inner wall of the oil storage tank.

In some examples of the invention, the bearing assembly further comprises: the cover plate is provided with a cover plate limiting part, and the cover plate limiting part is arranged on the upper end surface of the inner wall of the oil storage tank so as to limit the first bearing piece.

In some examples of the present invention, a limiting notch is provided at an edge of the cover plate limiting portion, and a surface of the first bearing member opposite to the cover plate limiting portion is provided with a limiting boss, and the limiting boss is located in the limiting notch.

In some examples of the present invention, a cover connection portion is provided inside the cover limiting portion, and the cover connection portion is connected to the second bearing member.

In some examples of the invention, the cover plate has a cover plate snap-in portion and the second bearing member has a second bearing member snap-in portion that snaps into place with the cover plate snap-in portion.

In some examples of the present invention, the air supply device further includes: the driving assembly is fixedly connected with the machine body and used for driving the machine body to rotate relative to the base.

In some examples of the invention, the drive assembly includes a drive member having a first engagement tooth at an output end thereof and a second engagement tooth engaged with the first engagement tooth.

In some examples of the invention, the drive assembly further includes a gear mount having a first tooth mount barrel for mounting the first tooth and a drive connection for connecting the drive, the drive connection being provided at an edge of the first tooth mount barrel.

In some examples of the invention, the drive assembly further includes a drive holder having a body provided with a through hole for mounting the first meshing tooth installation cylinder; the circumference edge of body has the connection turn-ups, the connection turn-ups is connected with the fuselage.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic diagram of an air supply device according to an embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of an air moving device according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a bearing assembly of an air moving device according to an embodiment of the present invention;

fig. 4 and 5 are exploded views of a part of the structure of an air blowing device according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a rolling structure mounting hole and a rolling structure of an air blowing device according to an embodiment of the present invention;

FIG. 7 is a top view of a bearing assembly of an air moving device according to an embodiment of the present invention;

fig. 8 is an exploded view of a driving assembly of an air blowing device according to an embodiment of the present invention.

Reference numerals:

an air supply device 300;

a body 400;

bearing assembly 800; a first bearing member 801; a limit boss 8011;

a second bearing 803; a reservoir 8031; an oil reservoir inner wall 8032; a second bearing member engaging portion 8033; a second engagement tooth 8034; a rolling structure 8035; a limit bracket 8036; a rolling structure mounting hole 8037;

a cover plate 804; cover plate limit portion 8041; limit notch 8042; a cover plate connecting portion 8043; a cover plate clamping portion 8044; a first stop wall 8045; a second stop wall 8046;

a drive assembly 805; a driving member 8051; first engagement teeth 8052; gear mount 8053; a first mating tooth mounting barrel 8054; a driving piece connecting portion 8055; a driver support 8056; a body 8057; a through hole 8058; a connecting flange 8059;

a base 806.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

An air blowing device 300 according to an embodiment of the present invention is described below with reference to fig. 1 to 8.

As shown in fig. 1 to 8, an air supply device 300 according to an embodiment of the present invention includes: a base 806, a fuselage 400, and a bearing assembly 800. The body 400 is disposed above the base 806, the bearing assembly 800 is disposed between the body 400 and the base 806, and the bearing assembly 800 includes: the first bearing member 801 and the second bearing member 803 are stacked in a gravity direction of the body 400, the gravity direction of the body 400 is an up-down direction in fig. 2, the first bearing member 801 and the second bearing member 803 are rotatable relative to each other, the first bearing member 801 is fixed to the body 400, the second bearing member 803 is fixed to the base 806, and it is to be noted that the second bearing member 803 is not rotated when the body 400 is rotated, and the first bearing member 801 is rotated relative to the second bearing member 803.

When the first bearing element 801 rotates relative to the second bearing element 803, the first bearing element 801 can rotate relative to the base 806 with the body 400, thereby completing the oscillating motion of the body 400. In the rotation process of the main body 400, the first bearing member 801 and the second bearing member 803 may be supported between the main body 400 and the base 806, so that the main body 400 may be prevented from shaking, thereby solving the problem that the main body 400 is easy to shake, and the bearing assembly 800 has a simple structure, is convenient to assemble, and may improve the assembly efficiency of the air supply device 300.

Therefore, the bearing assembly 800 is provided, the machine body 400 can be reliably supported, the machine body 400 can be prevented from shaking when the machine body 400 rotates, the bearing assembly 800 is simple in structure and convenient to assemble, and the assembly efficiency of the air supply device 300 can be improved.

In some embodiments of the invention, the bearing assembly 800 is arranged coaxially with the fuselage 400, for example: the central vertical axis of the bearing assembly 800 is coaxial with the central vertical axis of the body 400, so that the bearing assembly 800 can uniformly support the body 400, and the body 400 can be further prevented from shaking during the rotation of the body 400.

In some embodiments of the present invention, the radial dimension of the bearing assembly 800 is close to the radial dimension of the body 400, and it should be noted that, as shown in fig. 2, the radial dimension of the bearing assembly 800 is close to the radial dimension of the body 400 in a horizontal plane, so that the bearing assembly 800 can be positioned near the edge of the body 400, so that the bearing assembly 800 can support the body 400 more uniformly, and the body 400 is stressed more stably during the rotation of the body 400, thereby preventing the body 400 from shaking better.

In some embodiments of the present invention, as shown in fig. 3, 5 and 6, a plurality of rolling structures 8035 may be interposed between the first bearing member 801 and the second bearing member 803, and the plurality of rolling structures 8035 are located at a concentric circle having a radial distance from the outer circumference of the body 400 that is smaller than a radial distance from the concentric circle to the rotation axis of the bearing assembly 800. Wherein, through a plurality of rolling structures 8035 supporting between first bearing member 801 and second bearing member 803, the fuselage 400 rotates the in-process, can reduce first bearing member 801 pivoted coefficient of friction, can reduce the resistance when first bearing member 801 rotates to can make fuselage 400 pivoted more smooth and easy. And, the pressure G that the top surface of rolling structure 8035 received, the holding power F that the bottom surface of rolling structure 8035 received, wherein g=f, F and G are on a straight line, and pressure G and holding power F offset each other, can not produce the effort of other directions to rolling structure 8035, and rolling structure 8035 atress is steady.

In some embodiments of the present invention, the rolling structure 8035 may be configured as balls, where the balls are spherical structures, and during the rotation of the body 400, the friction coefficient of the rotation of the first bearing element 801 can be further reduced, and the resistance of the rotation of the first bearing element 801 can be further reduced, so that the rotation of the body 400 is smoother.

In some embodiments of the present invention, as shown in fig. 3, the second bearing 803 may be provided with an oil storage tank 8031, that is, the surface of the second bearing 803 contacting the rolling structure 8035 is provided with the oil storage tank 8031, and a plurality of rolling structures 8035 are located in the oil storage tank 8031, wherein the oil storage tank 8031 may have lubricating oil therein, the rolling structure 8035 may be effectively lubricated during rolling in the oil storage tank 8031, and abnormal noise generated when the rolling structure 8035 rolls may be reduced, so that the working noise of the air supply device 300 may be reduced. In addition, the bearing assembly 800 can be installed quickly and easily, the cost is lower than that of a precision bearing, and the production cost of the air supply device 300 can be reduced.

In some embodiments of the present invention, the plurality of rolling structures 8035 are spaced apart along the extending direction of the oil storage tank 8031, such that the plurality of rolling structures 8035 can be uniformly disposed in the oil storage tank 8031, and the plurality of rolling structures 8035 can more uniformly support the first bearing member 801, thereby enabling the body 400 to rotate more smoothly.

In some embodiments of the present invention, as shown in fig. 3, 5 and 6, the bearing assembly 800 may further include: the limit bracket 8036 is arranged corresponding to the oil storage tank 8031, preferably, the limit bracket 8036 is arranged in the oil storage tank 8031, the rolling structure 8035 is arranged on the limit bracket 8036, and the rolling structure 8035 is rotatable relative to the limit bracket 8036. Wherein, spacing support 8036 can play spacing effect to rolling structure 8035, can prevent that rolling structure 8035 from rolling at random in the arbitrary position of oil storage tank 8031 to can guarantee the supporting effect of rolling structure 8035 to first bearing member 801.

In some embodiments of the present invention, the oil storage tank 8031 and the limit bracket 8036 may be configured in a ring shape, so that the shape of the oil storage tank 8031 is similar to that of the limit bracket 8036, the limit bracket 8036 may be conveniently installed in the oil storage tank 8031, so that the assembly of the bearing assembly 800 may be conveniently performed, and the plurality of rolling structures 8035 may be spaced apart along the circumferential direction of the limit bracket 8036, so that the plurality of rolling structures 8035 may be uniformly arranged in the oil storage tank 8031, the first bearing member 801 may be better supported, the consistency of the supporting effect of the first bearing member 801 on different positions of the machine body 400 may be improved, and thus the machine body 400 may be more smoothly rotated.

In some embodiments of the present invention, as shown in fig. 5 and 6, the limiting bracket 8036 may be provided with a rolling structure mounting hole 8037 penetrating through the limiting bracket 8036, and the rolling structure 8035 is disposed in the rolling structure mounting hole 8037, so that the rolling structure 8035 can be mounted on the limiting bracket 8036, and the rolling structure mounting hole 8037 can better limit the rolling structure 8035.

In some embodiments of the present invention, in the thickness direction of the limit bracket 8036, the inner wall surface of the rolling structure mounting hole 8037 is arc-shaped, specifically, the inner wall surface of the rolling structure mounting hole 8037 is arc-shaped concave toward the limit bracket 8036, and after the rolling structure 8035 is assembled into the rolling structure mounting hole 8037, it can be ensured that the rolling structure 8035 can roll in the rolling structure mounting hole 8037, and also the rolling structure 8035 can roll in the rolling structure mounting hole 8037 more smoothly.

In some embodiments of the present invention, as shown in fig. 6, in the thickness direction of the limit bracket 8036, the diameters of both ends of the rolling structure mounting hole 8037 are set to D1, that is, the diameter of one end of the rolling structure mounting hole 8037 is set to D1, the diameter of the other end of the rolling structure mounting hole 8037 is also set to D1, the diameter of the middle part of the rolling structure mounting hole 8037 is D2, and the diameter of the rolling structure 8035 is D3, satisfying the relation: d2> D3> D1. Wherein, rolling structure 8035 can be installed in rolling structure mounting hole 8037 through interference fit mode, and rolling structure 8035 installs in rolling structure mounting hole 8037 after, can guarantee that rolling structure 8035 can not drop in rolling structure mounting hole 8037, can promote rolling structure 8035 and rolling structure mounting hole 8037 assembly's reliability.

In some embodiments of the present invention, as shown in fig. 3, the first bearing member 801 may be sleeved on the outer side of the inner wall 8032 of the oil storage tank 8031, and the first bearing member 801 may be rotatable relative to the inner wall 8032 of the oil storage tank, where, due to the connection of the first bearing member 801 with the main body 400, such arrangement can ensure that the first bearing member 801 may rotate together with the main body 400, and thus, the swinging of the main body 400 may be achieved. It should be noted that, the limiting bracket 8036 is sleeved outside the inner wall 8032 of the oil storage tank 8031, and the limiting bracket 8036 is located below the first bearing member 801.

In some embodiments of the present invention, as shown in fig. 3, 4, 5 and 7, the bearing assembly 800 further comprises: the cover plate 804, the cover plate 804 can have a cover plate limiting portion 8041, the cover plate limiting portion 8041 can be arranged on the upper end face of the oil storage tank inner wall 8032, the cover plate limiting portion 8041 can limit the first bearing element 801 in the upper and lower directions, and separation of the first bearing element 801 and the oil storage tank inner wall 8032 can be avoided, so that assembly reliability of the first bearing element 801 can be guaranteed. In addition, by adjusting the distance between the cover plate stopper 8041 and the first bearing member 801 in the vertical direction, the height of the main body 400 can be adjusted, and the amount of shake of the blower 300 can be further reduced.

Meanwhile, as shown in fig. 3, the inside of the cover plate stopper 8041 is provided with a cover plate connecting portion 8043, the cover plate connecting portion 8043 is arranged to extend downward, and the cover plate connecting portion 8043 is connected with the second bearing member 803, for example: the cover plate connecting portion 8043 is fixedly connected with the second bearing member 803, so that the cover plate 804 can be firmly mounted on the second bearing member 803, and the cover plate 804 does not rotate relative to the second bearing member 803.

Specifically, the cover plate 804 may have a cover plate clamping portion 8044, the second bearing member 803 may have a second bearing member clamping portion 8033 clamped with the cover plate clamping portion 8044, when the cover plate 804 and the second bearing member 803 are mounted, the cover plate clamping portion 8044 and the second bearing member clamping portion 8033 are clamped together, the cover plate clamping portion 8044 and the second bearing member clamping portion 8033 can be reliably assembled together, and when the cover plate 804 and the second bearing member 803 are assembled, the cover plate 803 do not need to be fixed by using screws, so that the cover plate 804 and the second bearing member 803 are assembled to be assembled.

In some embodiments of the present invention, as shown in fig. 3-5, the air supply device 300 may further include: the driving component 805 is fixedly connected with the machine body 400, and the driving component 805 is used for driving the machine body 400 to rotate relative to the base 806, wherein the driving component 805 can provide power for the rotation of the machine body 400, so that the working step of manually controlling the rotation of the machine body 400 by a user can be omitted, and the automation level of the air supply device 300 can be improved.

In some embodiments of the present invention, as shown in fig. 7 and 8, the driving assembly 805 may include: the driving member 8051, the driving member 8051 may be configured as a motor, the output end of the driving member 8051 has a first engaging tooth 8052, it should be noted that, the output shaft of the driving member 8051 has a first engaging tooth 8052, the first engaging tooth 8052 is sleeved on the output shaft, and the second bearing member 803 has a second engaging tooth 8034 engaged with the first engaging tooth 8052. Wherein, when the driving member 8051 works, the output end of the driving member 8051 rotates with the first engaging tooth 8052, and since the second bearing member 803 is connected with the base 806, for example: the second bearing member 803 is connected to the base 806 by a screw, and the second bearing member 803 does not rotate relative to the base 806, and at this time, the first engaging teeth 8052 move along the second engaging teeth 8034, so that the first bearing member 801 rotates together with the body 400, and the oscillating operation of the body 400 is realized.

Further, as shown in FIG. 8, the drive assembly 805 may further include a gear mount 8053, and the gear mount 8053 may have a first tooth mounting cylinder 8054 for mounting the first tooth 8052 and a drive connection portion 8055 for connecting the drive 8051, the drive connection portion 8055 being disposed at an edge of the first tooth mounting cylinder 8054. Wherein, first meshing tooth 8052 assembles in first meshing tooth mounting section of thick bamboo 8054, and first meshing tooth 8052 is rotatable in first meshing tooth mounting section of thick bamboo 8054 moreover, and the diapire of first meshing tooth mounting section of thick bamboo 8054 has the output shaft mounting hole, the lower extreme of first meshing tooth 8052 and output shaft is located the output shaft mounting hole, the setting like this can guarantee that both ends all have the support fixed at first meshing tooth 8052 rotation in-process, can not become single cantilever structure, the effectual stationarity of guaranteeing the gear engagement.

Further, as shown in FIG. 8, the driving assembly 805 may further include a driving member holder 8056, the driving member holder 8056 having a body 8057, the body 8057 being provided with a through hole 8058 for mounting the first meshing tooth mounting cylinder 8054, the through hole 8058 having the same shape as the cross-sectional shape of the first meshing tooth mounting cylinder 8054, the first meshing tooth mounting cylinder 8054 being located in the through hole 8058, a circumferential edge of the body 8057 may have a connection flange 8059, the connection flange 8059 being connected to the main body 400, such that the driving member 8051 and the gear fixing frame 8053 can be press-fastened to the main body 400, and the main body 400 and the driving assembly 805 can be ensured to be relatively stationary.

In some embodiments of the present invention, as shown in fig. 7, the edge of the cover plate limiting portion 8041 may be provided with a limiting notch 8042, the limiting notch 8042 is arc-shaped, the surface of the first bearing member 801 opposite to the cover plate limiting portion 8041 is provided with a limiting boss 8011, the limiting boss 8011 is disposed corresponding to the limiting notch 8042, and the limiting boss 8011 is located in the limiting notch 8042. During rotation of the first bearing member 801, the first bearing member 801 rotates relative to the cover plate 804, when the first bearing member 801 rotates clockwise to a limit position, the first bearing member 801 is abutted against the first stop wall 8045 of the limit notch 8042, at this time, the first stop wall 8045 limits the first bearing member 801 to continue rotating, the first bearing member 801 stops rotating, when the first bearing member 801 rotates anticlockwise to the limit position, the first bearing member 801 is abutted against the second stop wall 8046 of the limit notch 8042, at this time, the second stop wall 8046 limits the first bearing member 801 to continue rotating, the second bearing member 803 stops rotating, and forward and backward rotation time and speed of the driving member 8051 are controlled by a control program in the air supply device 300 to realize left and right shaking of the machine body 400. The present invention is not limited thereto and the bearing assembly 800 may be configured to drive the body 400 to make 360 ° rotation.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims

1. An air blowing device, comprising:

a base;

the machine body is arranged above the base;

a bearing assembly disposed between the body and the base, the bearing assembly comprising:

the first bearing piece and the second bearing piece are stacked in the gravity direction of the machine body, the first bearing piece and the second bearing piece can rotate relatively, the first bearing piece is fixed with the machine body, and the second bearing piece is fixed with the base;

a plurality of rolling structures are arranged between the first bearing piece and the second bearing piece in a clamping way,

the second bearing piece is provided with an oil storage tank, and a plurality of rolling structures are positioned in the oil storage tank;

the first bearing piece is sleeved on the outer side of the inner wall of the oil storage tank, and the first bearing piece can rotate relative to the inner wall of the oil storage tank;

the bearing assembly further comprises: the cover plate is provided with a cover plate limiting part which is arranged on the upper end surface of the inner wall of the oil storage tank so as to limit the first bearing piece;

the inner side of the cover plate limiting part is provided with a cover plate connecting part, and the cover plate connecting part is connected with the second bearing piece.

2. The air moving device as claimed in claim 1, wherein said bearing assembly is arranged coaxially with said main body.

3. A blowing device according to claim 1 or claim 2, in which the radial dimension of the bearing assembly is close to the radial dimension of the fuselage.

4. The air blowing device according to claim 1 or 2, wherein a radial distance of a concentric circle on which the plurality of rolling structures are located from an outer peripheral edge of the main body is smaller than a radial distance of the concentric circle from a rotation axis of the bearing assembly.

5. The air moving device as claimed in claim 4, wherein the rolling structure is a ball.

6. The air supply device of claim 1, wherein a plurality of the rolling structures are spaced apart along the direction of extension of the oil reservoir.

7. The air moving device of claim 1, wherein the bearing assembly further comprises: the limiting support is arranged in the oil storage tank, and the rolling structure is arranged on the limiting support and is rotatable relative to the limiting support.

8. The air supply device according to claim 7, wherein the oil reservoir and the limit bracket are each configured in a ring shape.

9. The air supply device according to claim 7, wherein the limit bracket is provided with a rolling structure mounting hole penetrating the limit bracket, and the rolling structure is arranged in the rolling structure mounting hole.

10. The air supply device according to claim 9, wherein an inner wall surface of the rolling structure mounting hole is arc-shaped in a thickness direction of the limit bracket.

11. The air supply device according to claim 10, wherein in the thickness direction of the limiting bracket, diameters of both ends of the rolling structure mounting hole are D1, a diameter of a middle part of the rolling structure mounting hole is D2, and a diameter of the rolling structure is D3, satisfying a relation: d2> D3> D1.

12. The air supply device according to claim 1, wherein a limiting notch is formed in the edge of the limiting portion of the cover plate, a limiting boss is formed on the surface, opposite to the limiting portion of the cover plate, of the first bearing member, and the limiting boss is located in the limiting notch.

13. The air supply device according to claim 1, wherein the cover plate has a cover plate engaging portion, and the second bearing member has a second bearing member engaging portion engaged with the cover plate engaging portion.

14. The air supply device according to claim 1, further comprising: the driving assembly is fixedly connected with the machine body and used for driving the machine body to rotate relative to the base.

15. The air moving device according to claim 14, wherein the driving assembly includes a driving member having a first engagement tooth at an output end thereof, and wherein the second member has a second engagement tooth engaged with the first engagement tooth.

16. The air supply device of claim 15, wherein the drive assembly further comprises a gear holder having a first tooth mounting cylinder for mounting the first tooth and a drive member connection for connecting the drive member, the drive member connection being provided at an edge of the first tooth mounting cylinder.

17. The air supply device according to claim 16, wherein the driving assembly further comprises a driving piece bracket having a body provided with a through hole for mounting the first meshing tooth installation cylinder;

the circumference edge of body has the connection turn-ups, the connection turn-ups is connected with the fuselage.