CN214631985U - Cleaning device - Google Patents

Abstract

The utility model relates to a cleaning device, cleaning device includes: a main housing having a receiving cavity; a drive wheel assembly comprising: the rotating shaft is inserted into the main shell along the axis direction and is accommodated in the accommodating cavity; the driving wheel unit is connected with the rotating shaft and at least partially accommodated in the accommodating cavity, and the driving wheel unit can rotate around the rotating shaft; and a shaft withdrawing gap is formed between the end surface of one end of the rotating shaft inserted into the accommodating cavity and the cavity wall of the accommodating cavity. Above-mentioned cleaning device, when needs maintenance or change drive wheel subassembly, the operator can stretch into extracting tool and move back in the axle clearance, then exerts the effort of axis direction so that the other end of axis of rotation stretches out the main casing body to the axis of rotation is followed the light dismantlement of main casing body, and then conveniently dismantles the drive wheel unit.

Description

Cleaning device

Technical Field

The utility model relates to an intelligence electrical apparatus technical field especially relates to a cleaning device.

Background

With the progress of science and technology and the development of society, cleaning equipment such as a floor sweeping robot, a floor mopping robot or a mopping and sweeping integrated robot for cleaning indoor floors gradually enter the lives of people. The cleaning equipment can automatically detect factors such as room size, furniture placement and ground cleanliness, and a reasonable cleaning route is formulated by means of a built-in program to clean the ground, so that the cleaning equipment is popular with people, is more and more widely applied to the life of people, obviously reduces the burden of people, and brings great convenience to the life of people.

The driving wheel assembly is an indispensable important structure of the cleaning device as a structure for driving the cleaning device to move. However, the existing driving wheel assembly is complex in structure and inconvenient to disassemble and assemble, so that the assembly efficiency of the cleaning equipment is reduced, and the difficulty of after-sale maintenance is improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the inconvenient problem of cleaning equipment's drive wheel subassembly dismouting, provide a cleaning equipment, this cleaning equipment can reach the technological effect who improves drive wheel subassembly dismouting convenience.

According to an aspect of the present application, there is provided a cleaning apparatus including:

a main housing having a receiving cavity; and

a drive wheel assembly comprising:

the rotating shaft is inserted into the main shell along the axis direction and is accommodated in the accommodating cavity; and

the driving wheel unit is connected to the rotating shaft and at least partially accommodated in the accommodating cavity, and the driving wheel unit can rotate around the rotating shaft;

and a shaft withdrawing gap is formed between the end surface of one end of the rotating shaft inserted into the accommodating cavity and the cavity wall of the accommodating cavity.

In one embodiment, the main housing includes a lower housing and an upper housing that are fastened to each other, the lower housing includes a lower housing main body and a driving wheel housing, the lower housing main body and the driving wheel housing are integrally formed, and the driving wheel housing defines the accommodating cavity.

In one embodiment, the driving wheel unit includes:

a reduction gearbox having an output end and an output end;

the driving wheel is arranged on the reduction gearbox and is connected with the output end of the reduction gearbox; and

the driving motor is arranged on the reduction gearbox and connected with the output end of the reduction gearbox, and drives the driving wheel to rotate by means of the reduction gearbox so as to enable the cleaning equipment to move;

the reduction gearbox is provided with a rotating shaft mounting hole, the rotating shaft penetrates through the rotating shaft mounting hole, and two ends of the rotating shaft in the axis direction extend out of the rotating shaft mounting hole and are limited in the main shell.

In one embodiment, the dimension of the shaft receding gap in the axial direction is 2mm to 6 mm.

In one embodiment, the rotating shaft includes a first fixed end and a second fixed end that are opposite to each other in the axial direction, the first fixed end and the second fixed end are respectively coupled to the main housing, the first fixed end is located in front of the second fixed end in the inserting direction of the rotating shaft, and the shaft-withdrawing gap exists between the first fixed end and the cavity wall of the accommodating cavity.

In one embodiment, the main housing is provided with a first fixing hole and a second fixing hole, the first fixing hole and the second fixing hole are arranged at intervals in the inserting direction of the rotating shaft, the first fixing end is inserted into the first fixing hole, and the second fixing end is inserted into the second fixing hole.

In one embodiment, the first fixing end is in interference fit with the first fixing hole, and/or the second fixing end is in interference fit with the second fixing hole.

In one embodiment, the side wall of the second fixing end is provided with a matching protrusion, and the second fixing end is in interference fit with the second fixing hole through the matching protrusion.

In one embodiment, the rotating shaft further includes a circumferential direction surrounding the axis direction, and a plurality of the engaging protrusions are arranged at intervals in the circumferential direction, each of the engaging protrusions extending linearly in the axis direction.

In one embodiment, the outer wall of the second fixing end extends smoothly in the circumferential direction, and the outer diameter of the second fixing end is not greater than the inner diameter of the first fixing hole.

In one embodiment, the cleaning device is a sweeping robot, a mopping robot or a sweeping and mopping integrated robot.

Above-mentioned cleaning device, when needs maintenance or change drive wheel subassembly, the operator can stretch into extracting tool and move back in the axle clearance, then exerts the effort of axis direction so that the other end of axis of rotation stretches out the main casing body to the axis of rotation is followed the light dismantlement of main casing body, and then conveniently dismantles the drive wheel unit.

Drawings

Fig. 1 is an exploded view of a cleaning device according to an embodiment of the present invention;

FIG. 2 is a schematic view illustrating the installation of a rotating shaft and a lower case of the cleaning apparatus shown in FIG. 1;

FIG. 3 is a top view of the lower housing of the cleaning appliance of FIG. 1 with the rotating shaft mounted thereto;

FIG. 4 is an enlarged view of a portion of the lower shell shown in FIG. 3 at A;

FIG. 5 is a top view of a lower housing with a drive wheel mounted thereon according to an embodiment of the present invention;

FIG. 6 is a sectional view taken along line B-B of the lower shell of FIG. 5;

FIG. 7 is a side view of a lower housing with a drive wheel assembly mounted thereto according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a rotating shaft of a cleaning device according to an embodiment of the present invention.

The reference numbers illustrate:

100. cleaning equipment; 20. a main housing; 21. a lower case; 212. a lower case main body; 214. a drive housing; 2141. an accommodating chamber; 23. an upper shell; 40. a drive wheel assembly; 41. a drive wheel unit; 412. a reduction gearbox; 414. a drive wheel; 416. a drive motor; 43. a rotating shaft; 432. a first fixed end; 434. a second fixed end; 4341. and a fitting projection.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to 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", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Fig. 1 shows an exploded view of a cleaning device in an embodiment of the invention. Fig. 2 shows a schematic view of the installation of the rotating shaft and the lower shell of the cleaning device in an embodiment of the present invention.

Referring to fig. 1 and 2, a cleaning apparatus 100 according to an embodiment of the present invention is used for moving along a surface of an object to be cleaned to clean the surface of the object (e.g., a floor). The following describes the structure of the cleaning device 100 in the present application, taking the cleaning device 100 as an example of a sweeping and mopping integrated robot. The present embodiment is described as an example, and the technical scope of the present application is not limited thereto. It is understood that in other embodiments, the cleaning device 100 may also be embodied as other devices, such as a floor mopping robot, and the like, without limitation.

The cleaning device 100 includes a main housing 20, a driving wheel assembly 40 mounted on the main housing 20, a dust suction assembly, and a power supply assembly (not shown). The driving wheel assembly 40 is used for driving the cleaning device 100 to move on the surface of an object, the dust collection assembly is used for adsorbing dust and sundries on the surface of the object, and the power supply assembly is used for providing working electric energy for the driving wheel assembly 40 and the dust collection assembly. It is to be understood that the specific configuration of the cleaning device 100 is not limited and may be set as desired.

In some embodiments, the main housing 20 includes a lower housing 21 and an upper housing 23, and the lower housing 21 includes a lower housing main body 212 and a driving wheel housing 214. Lower casing main part 212 and epitheca 23 buckle each other, and drive wheel casing 214 is located lower casing main part 212 towards one side of epitheca 23 and with lower casing main part 212 integrated into one piece, and drive wheel casing 214 encloses to close and forms the chamber 2141 that holds that is used for holding drive wheel subassembly 40, and drive wheel subassembly 40 is held in holding in the chamber 2141 at least partially.

So, compare in the drive wheel subassembly 40 among the prior art accept in with the shell of inferior valve 21 independent setting, drive wheel casing 214 in this application forms with inferior valve main part 212 integrated into one piece, consequently can with drive wheel subassembly 40 direct mount in inferior valve 21, and need not additionally to set up the cladding in the outer shell of drive wheel subassembly 40 to save part quantity and arrangement space, promoted assembly efficiency simultaneously.

The cleaning device 100 includes two sets of driving wheel assemblies 40, the two sets of driving wheel assemblies 40 are symmetrically installed at opposite sides of the main housing 20, and each set of driving wheel assemblies 40 includes a driving wheel unit 41 and a rotating shaft 43. The driving wheel unit 41 comprises a reduction gearbox 412, a driving wheel 414 and a driving motor 416, wherein the reduction gearbox 412 is provided with an input end and an output end, the driving motor 416 is arranged on the reduction gearbox 412 and is in transmission connection with the input end of the reduction gearbox 412, and the driving wheel 414 is arranged on the reduction gearbox 412 and is in transmission connection with the output end of the reduction gearbox 412. Thus, the driving motor 416 is drivingly connected to the driving wheel 414 through the reduction box 412, and the driving motor 416 drives the driving wheel 414 to rotate by means of the reduction box 412 to drive the cleaning device 100 to move.

Further, in some embodiments, the drive motor 416 is located on one side in the radial direction of the drive wheel 414, the axial direction of the drive motor 416 is parallel to the axial direction of the drive wheel 414, and the drive motor 416 is located in front of the drive wheel 414 in the forward direction of the cleaning apparatus 100. Compared with the prior art, in which the driving motor 416 is located behind the driving wheel 414 in the advancing direction of the cleaning device 100, the driving motor 416 in the present application is located in front of the driving wheel 414 in the advancing direction of the cleaning device 100, so that the side of the driving wheel 414 facing the driving motor 416 has a larger friction force with the floor under the pressure of the driving motor 416, and therefore, the driving wheel 414 has a better obstacle crossing capability when facing a front obstacle during the advancing process of the cleaning device 100, thereby further improving the performance of the cleaning device 100.

Further, the radial dimension of the driving wheel 414 is larger than that of the driving motor 416, so that a side of the driving wheel 414 facing the driving motor 416 forms an accommodating space into which a portion of the roll brush assembly (or other mechanism located in front of the driving wheel assembly 40 in the forward direction of the cleaning apparatus 100) can protrude.

In this way, the cleaning device 100 of the present application utilizes the radial dimension difference between the driving motor 416 and the driving wheel 414 to accommodate the rolling brush assembly located in front of the driving wheel assembly 40 in the advancing direction of the cleaning device 100, so as to make the overall structure of the cleaning device 100 more compact, and facilitate the volume increase of the rolling brush assembly or other mechanisms without changing the overall volume of the cleaning device 100. In the related art, since the driving wheel 414 is positioned in front of the driving motor 416 in the forward direction of the cleaning apparatus 100, the components such as the brush roll assembly can be positioned only in front of the driving wheel assembly 40, thereby increasing the size of the cleaning apparatus 100 in the forward direction thereof.

It is understood that the forward direction of the cleaning apparatus 100 in this application refers to the moving direction of the cleaning apparatus 100 during normal sweeping. And when the cleaning apparatus 100 touches an obstacle, the cleaning apparatus 100 moves backward in a direction opposite to the forward direction to avoid the obstacle.

Referring to fig. 3 and 4, fig. 3 is a top view of a lower housing with a rotating shaft of a cleaning device according to an embodiment of the present invention; fig. 4 shows a partially enlarged view of the lower case of fig. 3 at a.

In some embodiments, the rotating shaft 43 is substantially cylindrical in configuration having an axial direction and a circumferential direction that surrounds the axial direction. The reduction box 412 is further provided with a driving shaft mounting hole, the driving shaft mounting hole is located between the driving wheel 414 and the driving motor 416, and the rotating shaft 43 penetrates through the driving shaft mounting hole. In this manner, the driving wheel unit 41 is connected to the rotating shaft 43, and the driving wheel unit 41 is rotatable about the rotating shaft 43 to float up and down according to various terrains. When the driving wheel unit 41 is assembled to the accommodating cavity 2141, the rotation shaft 43 may be inserted from the outside of the main housing 20 in the axial direction to the main housing 20 and accommodated in the accommodating cavity 2141.

Preferably, the rotating shaft 42 is located in an accommodating space formed between the driving wheel 414 and the driving motor 416 (i.e., located on a side of the driving wheel 414 facing the driving motor 416) in the advancing direction of the cleaning device 100.

In this way, compared to the prior art in which the rotating shaft 42 is located on the side of the driving motor 416 away from the driving wheel 414, the maximum rotating radius of the driving wheel unit 41 of the present application is the maximum distance between the outer circumferential surface of the driving wheel 414 and the rotating shaft 42, and this distance is much smaller than the rotating radius of the prior art driving wheel unit (the sum of the outer diameter of the driving motor 416 and the outer diameter of the driving wheel 414), so that the occupied space is effectively reduced, the arrangement of the parts in the cleaning apparatus 100 is more compact, and the volume of the cleaning apparatus 100 can be further reduced.

Since the drive wheel unit 41 in the present application is directly mounted to the drive wheel housing 214 integrally formed with the lower case main body 212, the drive shaft 43 needs to be inserted after the drive wheel unit 41 is mounted to the accommodating cavity 2141, and therefore the rotational shaft 43 needs to be removed before the drive wheel unit 41 is removed. If the rotating shaft 43 is installed in the middle rotating shaft 43 according to the prior art, the rotating shaft 43 is difficult to be removed, which in turn makes it difficult to remove the driving wheel unit 41.

In view of the above, a shaft-withdrawing gap exists between the end surface of the end of the rotating shaft 43 inserted into the accommodating cavity 2141 and the cavity wall of the accommodating cavity 2141. In this manner, when the driving wheel assembly 40 needs to be repaired or replaced, the operator can insert the removal tool into the shaft-withdrawing gap and then apply an axial force to the rotation shaft 43 to extend the other end of the rotation shaft 43 out of the main housing 20, so that the rotation shaft 43 can be easily removed from the main housing 20, thereby conveniently removing the driving wheel unit 41.

It will be appreciated that the dimension of the shaft clearance in the axial direction of the rotating shaft 43 may be set according to the dimension of the removal tool. Specifically, in some embodiments, the dimension α of the shaft clearance in the axial direction is 2mm to 6mm, thereby leaving sufficient operating space for the disassembly tool, while not excessively increasing the volume of the receiving cavity 2141 to cause a significant increase in the overall size of the cleaning apparatus 100.

Referring to fig. 5 to 8, fig. 5 is a top view of a lower housing with a driving wheel 414 mounted thereon according to an embodiment of the present invention; FIG. 6 is a sectional view taken along line B-B of the lower shell of FIG. 5; fig. 7 shows a side view of a lower housing with a drive wheel assembly installed in an embodiment of the invention; fig. 8 shows a schematic structural diagram of a rotating shaft of a cleaning device in an embodiment of the present invention.

Specifically, the rotating shaft 43 includes a first fixed end 432 and a second fixed end 434 which are oppositely arranged in the axial direction, the main housing 20 is provided with a first fixed hole and a second fixed hole which are arranged at intervals in the inserting direction of the rotating shaft 43, the first fixed end 432 extends out of the rotating shaft mounting hole of the reduction gearbox 412 and is inserted in the first fixed hole, the second fixed end 434 extends out of the rotating shaft mounting hole of the reduction gearbox 412 and is inserted in the second fixed hole, in the inserting direction of the rotating shaft 43, the first fixed end 432 is located in front of the second fixed end 434, and a shaft withdrawing gap exists between the first fixed end 432 and the cavity wall of the accommodating cavity 2141.

Thus, the first fixed end 432 and the second fixed end 434 of the rotation shaft 43 are respectively coupled to the main housing 20, and the driving wheel unit 41 is sleeved between the first fixed end 432 and the second fixed end 434 of the rotation shaft 43 to swing around the rotation shaft 43.

Further, in order to fix the rotation shaft 43 relative to the main housing 20 without rotation and axial movement, the first fixing end 432 is interference-fitted with the first fixing hole, and/or the second fixing end 434 is interference-fitted with the second fixing hole.

Specifically, in some embodiments, the outer wall of the second fixing end 434 extends smoothly in the circumferential direction, and the outer diameter of the second fixing end 434 is not greater than the inner diameter of the first fixing hole and is greater than the inner diameter of the second fixing hole. The side wall of the second fixed end 434 is provided with a plurality of fitting projections 4341 arranged at intervals in the circumferential direction, and each fitting projection 4341 extends linearly in the axial direction.

Thus, the second fixing hole can easily pass through the first fixing hole and form an interference fit with the second fixing hole, and the second fixing end 434 forms a reliable interference fit with the second fixing hole by means of the fitting projection 4341. And when dismantling axis of rotation 43, extracting tool stretches into and moves back the axle clearance and applys deviating from to insert the power of establishing the direction to axis of rotation 43, can make first stiff end 432 with stretch out first fixed orifices, second stiff end 434 stretches out the second fixed orifices to eliminate the interference fit state of axis of rotation 43 and main casing body 20, and then realize the light dismantlement of axis of rotation 43.

Referring back to fig. 1, in some embodiments, the driving wheel assembly 40 further includes an elastic member 45 (e.g., a spring), one end of the elastic member 45 is coupled to a side of the reduction box 412 away from the lower shell 21 and is located at an end of the reduction box 412 where the driving motor 416 is disposed, and the other end of the elastic member 43 is coupled to the driving housing 24. The elastic member 43 is used to apply a force to the reduction gear box 412 away from the upper case 22 so that the driving wheel 414 has a certain ground contact force to maintain sufficient contact with the surface of the object.

Above-mentioned cleaning device 100, when setting up the shell of drive wheel subassembly 40 and inferior valve 21 integration and be convenient for the installation of drive wheel subassembly 40, can easily dismantle axis of rotation 43 through setting up and move back the axle clearance, consequently can pull down drive wheel subassembly 40 fast to realized the quick installation and the dismantlement of drive wheel subassembly 40, improved cleaning device 100's maintainability when having improved cleaning device 100's assembly efficiency.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (11)

1. A cleaning device, characterized in that the cleaning device comprises:

a main housing (20) having a receiving cavity (2141); and

a drive wheel assembly (40) comprising:

the rotating shaft (43) is inserted into the main shell (20) along the axial direction and is contained in the containing cavity (2141); and

a driving wheel unit (41) connected to the rotating shaft (43) and at least partially accommodated in the accommodating cavity (2141), the driving wheel unit (41) being rotatable around the rotating shaft (43);

and a shaft withdrawing gap is formed between the end surface of one end of the rotating shaft (43) inserted into the accommodating cavity (2141) and the cavity wall of the accommodating cavity (2141).

2. The cleaning apparatus according to claim 1, wherein the main housing comprises a lower housing (21) and an upper housing (23) which are engaged with each other, the lower housing (21) comprises a lower housing main body (212) and a driving wheel housing (214), the lower housing main body (212) and the driving wheel housing (214) are integrally formed, and the driving wheel housing (214) defines the accommodating cavity (2141).

3. Cleaning device according to claim 1, characterized in that the drive wheel unit (41) comprises:

a reduction gearbox (412) having an output and an output;

a drive wheel (414) mounted on the gearbox (412) and connected to the output of the gearbox (412); and

the driving motor (416) is installed on the reduction gearbox (412) and is connected with the output end of the reduction gearbox (412), and the driving motor (416) drives the driving wheel (414) to rotate by means of the reduction gearbox (412) so as to enable the cleaning equipment to move;

the reduction gearbox (412) is provided with a rotating shaft mounting hole, the rotating shaft (43) penetrates through the rotating shaft mounting hole, and two ends of the rotating shaft (43) in the axis direction extend out of the rotating shaft mounting hole and are limited in the main shell (20).

4. The cleaning apparatus defined in claim 1, wherein the dimension of the shaft clearance in the direction of the axis is from 2mm to 6 mm.

5. The cleaning apparatus according to claim 1, wherein the rotation shaft (43) includes a first fixing end (432) and a second fixing end (434) which are oppositely arranged in the axial direction, the first fixing end (432) and the second fixing end (434) are respectively coupled with the main housing (20), the first fixing end (432) is located in front of the second fixing end (434) in the insertion direction of the rotation shaft (43), and the shaft retreating gap exists between the first fixing end (432) and the cavity wall of the accommodating cavity (2141).

6. The cleaning apparatus according to claim 5, wherein the main housing (20) is provided with a first fixing hole and a second fixing hole, the first fixing hole and the second fixing hole are spaced apart in an insertion direction of the rotation shaft (43), the first fixing end (432) is inserted into the first fixing hole, and the second fixing end (434) is inserted into the second fixing hole.

7. A cleaning device according to claim 6, wherein the first securing end (432) is an interference fit with the first securing hole and/or the second securing end (434) is an interference fit with the second securing hole.

8. The cleaning apparatus as claimed in claim 7, wherein a sidewall of the second fixing end (434) is provided with a fitting projection (4341), and the second fixing end (434) is interference-fitted with the second fixing hole by means of the fitting projection (4341).

9. The cleaning apparatus according to claim 8, wherein the rotation shaft (43) further includes a circumferential direction surrounding the axis direction, a plurality of the engagement projections (4341) are arranged at intervals in the circumferential direction, and each of the engagement projections (4341) extends linearly in the axis direction.

10. The cleaning apparatus as claimed in claim 9, wherein an outer wall of the second fixing end (434) extends smoothly in the circumferential direction, and an outer diameter of the second fixing end (434) is not greater than an inner diameter of the first fixing hole.

11. The cleaning apparatus of any one of claims 1 to 10, wherein the cleaning apparatus is a sweeping robot, a mopping robot or a sweeping and mopping integrated robot.

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