CN217610821U - Rotating wheel assembly and sweeper - Google Patents

Abstract

The application discloses swivel wheel subassembly and machine of sweeping floor. The rotating wheel assembly comprises a wheel hub, a wheel cover connected with the wheel hub and a tire, wherein a plurality of deformation buffer holes are formed in the tire, and the plurality of deformation buffer holes are sequentially arranged along the circumferential direction of the tire. In the embodiment of this application, through set up a plurality of deformation buffer holes on the tire for the tire can take place deformation after receiving enough big pressure, and when the gyro wheel subassembly was applied to the machine of sweeping the floor, when the machine of sweeping the floor removed the blockking that in-process met the barrier, the tire can take place deformation, and then reduces the possibility of being stuck, makes tire assembly can comparatively smoothly pass through the barrier. And under the condition that the tire takes place deformation, can increase the area of contact with ground, promote the power of grabbing of runner subassembly, the runner subassembly is difficult for skidding, can comparatively smoothly pass through the barrier, guarantees that self has sufficient obstacle-crossing ability.

Description

Rotating wheel assembly and sweeper

Technical Field

The application relates to the field of cleaning equipment, especially relates to a rotating wheel subassembly and machine of sweeping floor.

Background

The sweeper has the functions of automatic sweeping, mopping and the like, and can sweep a certain environment according to preset requirements. When the sweeper works, the sweeper walks on a cleaning path according to the instruction, and the rotating wheel assembly can be controlled to rotate by the instruction, so that the functions of advancing, retreating, steering and the like are realized, and the cleaning work is smoothly finished.

However, in the actual working process of the sweeper, a barrier may exist on a traveling route, and the rotating wheel assembly of the sweeper is easily blocked by the barrier and cannot smoothly pass over the barrier, so that the working efficiency and the cleaning capability of the sweeper are reduced.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a rotating wheel subassembly and machine of sweeping floor, aim at solving prior art, the problem that the performance is poor is hindered more of machine of sweeping floor.

To achieve the purpose, the embodiment of the application adopts the following technical scheme:

the rotating wheel assembly comprises a wheel hub, a wheel cover connected with the wheel hub and a tire connected with the wheel cover, wherein a plurality of deformation buffer holes are formed in the tire and are arranged in sequence along the circumferential direction of the tire.

In one embodiment, the tire has an outer peripheral surface, an inner peripheral surface and two side end surfaces, and the tire is recessed on the side end surfaces to form the deformation buffer holes.

In one embodiment, the deformation buffer hole is a blind hole.

In one embodiment, the deformation buffer holes are provided on both the side end faces.

In one embodiment, the cross section of the deformation buffer hole is an isosceles triangle.

In one embodiment, a plurality of bosses are arranged on the outer peripheral surface, and the plurality of bosses are sequentially arranged along the circumferential direction of the tire.

In one embodiment, adjacent bosses have a gap therebetween.

In one embodiment, the inner circumferential surface is provided with a connecting ring, the connecting ring abuts between the hub and the wheel cover, and the hub and the wheel cover are connected through screws.

In one embodiment, the connecting ring is provided with a limiting hole, the hub is provided with a first limiting protrusion inserted into the limiting hole, and the wheel cover is provided with a second limiting protrusion inserted into the limiting hole.

In one embodiment, the wheel cover is provided with a positioning hole, and the wheel hub is provided with a positioning column inserted into the positioning hole.

In one embodiment, the hub is provided with a connecting threaded hole, the wheel cover is provided with a connecting through hole, and the screw penetrates through the connecting through hole and is in threaded connection with the connecting threaded hole.

In one embodiment, the hub is provided with a connecting column, the connecting threaded hole is formed in the connecting column, the wheel cover is provided with a limiting ring surrounding the connecting through hole, and the connecting column is inserted into the connecting ring.

In one embodiment, the number of the screws is more than three, each screw is located on the same circumference, and the hub is provided with a plurality of annular reinforcing ribs.

The sweeper comprises the rotating wheel assembly in any one of the embodiments.

The beneficial effects of the embodiment of the application are as follows: in the embodiment of this application, through set up a plurality of deformation buffer holes on the tire for the tire can take place deformation after receiving enough big pressure, and when the wheel subassembly was applied to the machine of sweeping the floor, when the machine of sweeping the floor removed the blockking of in-process meetting the barrier, the tire can take place deformation, and then reduces the possibility of being stuck, makes the tire subassembly can comparatively smoothly pass through the barrier. And under the condition that the tire takes place deformation, can increase the area of contact with ground, promote the power of grabbing of runner subassembly, the runner subassembly is difficult for skidding, can comparatively smoothly pass through the barrier, guarantees that self has sufficient obstacle-crossing ability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a wheel assembly in an embodiment of the present application;

FIG. 2 is an exploded view of a wheel assembly in an embodiment of the present application;

FIG. 3 is a cross-sectional view of a wheel assembly in an embodiment of the present application;

FIG. 4 is a partial view of a tire in an embodiment of the present application;

FIG. 5 is a cross-sectional view of a tire in an embodiment of the present application;

FIG. 6 is a schematic structural view of a hub in an embodiment of the present application;

in the figure:

1. a hub; 101. a first limit protrusion; 102. a positioning column; 103. connecting the threaded hole; 104. connecting columns; 105. a circular reinforcing rib; 2. a wheel cover; 201. a second limit bulge; 202. positioning holes; 203. a connecting through hole; 204. a limiting ring; 3. a tire; 301. a deformation buffer hole; 302. an outer peripheral surface; 303. an inner peripheral surface; 304. a side end face; 305. a boss; 306. a connecting ring; 3061. a limiting hole; 4. and (4) screws.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

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 be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings to facilitate the description of the application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in operation as a limitation of the application.

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 one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The sweeper has the functions of automatic sweeping, mopping and the like, and can sweep a certain environment according to the preset requirement. When the sweeper works, the sweeper walks on a cleaning path according to the instruction, and the rotating wheel assembly can be controlled to rotate by the instruction, so that the functions of advancing, retreating, steering and the like are realized, and the cleaning work is smoothly completed.

However, in the actual working process of the existing sweeper, a barrier may exist on a traveling route, a rotating wheel assembly of the sweeper is easily blocked by the barrier and cannot smoothly cross the barrier, and the sweeper has the problem of being clamped or moving unsmoothly.

In order to solve the problem, embodiments of the present application provide a rotating wheel assembly for a sweeper and a sweeper with the rotating wheel assembly, and the implementation of the present application is described in detail below with reference to specific embodiments.

As shown in fig. 1-3, the present application provides a wheel assembly, which includes a wheel hub 1, a wheel cover 2 connected to the wheel hub 1, and a tire 3 connected to the wheel hub 1 and the wheel cover 2, wherein the wheel hub 1 is connected to the wheel cover 2 and then integrally mounted on the tire 3, thereby forming the wheel assembly.

Be equipped with a plurality of deformation buffer holes 301 on tire 3, receiving sufficient pressure after, deformation can take place for the position that tire 3 was provided with deformation buffer holes 301, for example when meetting the barrier, receives the pressure of barrier after, deformation takes place for tire 3 for the comparatively light obstacle that crosses of runner assembly. Meanwhile, the tire 3 is stressed by the pressure of the obstacle, after deformation occurs, the contact area between the tire 3 and the ground can be increased, the rotating wheel assembly is not easy to slip when clamped, the obstacle can be smoothly crossed, and the obstacle crossing capability of the rotating wheel assembly is further increased.

Optionally, a plurality of deformation buffer holes 301 evenly set up along tire 3's circumferencial direction in proper order, and when tire 3 of runner subassembly rotated to different positions and met the barrier, all can have the deformation buffer hole 301 atress that corresponds and take place deformation, and then reduce the possibility of being blocked, promote the ability of crossing the obstacle under the circumstances that promotes tire 3 and grab the land fertility. The above-mentioned even setting definition does, and the interval between the adjacent deformation buffer hole 301 is the same, also can be on the same basis in interval, and the width change opposite direction of adjacent deformation buffer hole 301 cross section for be difficult for the mutual influence when adjacent deformation buffer hole 301 takes place to deform, but can provide sufficient deformation space for adjacent deformation buffer hole 301, make the deformation that tire 3 can be even.

In the embodiment of this application, through set up a plurality of deformation buffer holes 301 on tire 3 for tire 3 can take place deformation after receiving enough big pressure, and when the wheel subassembly was applied to the machine of sweeping the floor, when the machine of sweeping the floor removed the blockking of in-process meetting the barrier, tire 3 can take place deformation, and then reduces the possibility of being stuck, makes 3 subassemblies of tire can comparatively smoothly pass through the barrier. And under the condition that tire 3 takes place deformation, can increase the area of contact with ground, promote the land fertility of grabbing of swivel subassembly, the swivel subassembly is difficult for skidding, can comparatively smoothly pass through the barrier, guarantees that self has sufficient obstacle-crossing ability.

Referring to fig. 1-2, as another embodiment of the wheel assembly provided in the present application, the tire 3 has an outer circumferential surface 302, an inner circumferential surface 303 and two side end surfaces 304, that is, the tire 3 is cylindrical, the outer circumferential surface 302 is used for contacting with the ground, and the inner circumferential surface 303 may be provided with corresponding structures to be connected with the hub 1 and the wheel cover 2, so as to complete the assembly of the wheel assembly.

The tire 3 is sunken in the side end face 304 to form a deformation buffer hole 301, the outer peripheral face 302 is in contact with the ground and can be pressed by the ground and obstacles on the ground, the inner peripheral face 303 of the tire 3 is connected with the hub 1 and the wheel cover 2, therefore, after the whole rotating wheel assembly is pressed, the structure between the two side end faces 304 is deformed, the deformation buffer hole 301 is arranged on the side end face 304, adaptive deformation can be generated when external force is applied, the deformation direction is the radial direction of the tire 3, the deformation of the tire 3 along the axial direction is not easy to cause, better contact between the tire 3 and the ground can be ensured, and the damage of the tire 3 is not easy to cause.

Referring to fig. 5, as another embodiment of the turning wheel assembly provided by the present application, the deformation buffer hole 301 is a blind hole, that is, the deformation buffer hole 301 has a hole bottom, and the solid structure of the hole bottom portion is connected between the inner circumferential surface 303 and the outer circumferential surface 302, and under the condition that the sweeper works normally, the solid structure of the hole bottom portion can support the whole weight of the sweeper without causing large deformation of the deformation buffer hole 301, so that the sweeper can move quickly and normally. Only when the tire 3 meets an obstacle, the tire 3 is greatly deformed at the deformation buffer hole 301 under the condition that the pressure received by the tire is suddenly increased, so that the grip force is increased, the slipping is avoided, and the obstacle can be smoothly crossed by the rotating wheel assembly.

Optionally, the depth of the deformation buffer holes 301 on the lateral end faces 304 on both sides is the same, that is, the middle cross section of the tire 3 is symmetrical, so that the deformation buffer holes 301 on both sides of the tire 3 are symmetrically arranged, so that the tire 3 is ensured to be subjected to the same force and then approach to the same deformation, the deformation can be uniformly generated at all positions, and the sweeper is not easy to roll over when crossing obstacles.

Referring to fig. 1-2 and 5, as another embodiment of the turning wheel assembly provided in the present application, the deformation buffer holes 301 are respectively disposed on two side end surfaces 304, that is, when the tire 3 is deformed by a force, the tire is subjected to the same force, and thus the tire is deformed uniformly, and the sweeper is not prone to roll over when passing over an obstacle.

Optionally, the depths of the deformation buffer holes 301 on the two side end surfaces 304 are the same, so that the distribution uniformity of the deformation buffer holes 301 is realized, and further, the structural symmetry of the two sides of the tire 3 is realized, when the tire 3 is deformed due to stress, the two sides can be further approached to be consistent under the condition of the same force, and relatively uniform deformation can be generated.

The number of the deformation buffer holes 301 on the two side end faces 304 can be the same, and the deformation buffer holes 301 are in one-to-one correspondence, the axes of the corresponding deformation buffer holes 301 are located on the same axis, that is, the adjacent deformation buffer holes on the two side end faces 304 are oppositely arranged, and are uniformly arranged on the circumference where the deformation buffer holes are located, so that the tire 3 is further ensured to be subjected to the same force and then to be subjected to the same deformation, and the deformation buffer holes can be uniformly deformed everywhere, so that the sweeper is not easy to turn on one's side when crossing obstacles.

Referring to fig. 1 to fig. 3, as another specific embodiment of the turning wheel assembly provided by the present application, the cross section of the deformation buffer hole 301 is an isosceles triangle, and the isosceles triangle has sufficient stability, so that after the deformation buffer hole 301 is subjected to pressure, corresponding deformation can occur according to the difference of the pressure, and the direction of the deformation is relatively fixed, that is, the deformation is relatively regular, so that the stability of the rotation of the tire 3 can be ensured, and the sweeper is not prone to rollover.

Optionally, the cross section distribution of adjacent deformation buffer holes 301 is named as first isosceles triangle and second isosceles triangle, the width of the first isosceles triangle (the distance between the two waist sides) is gradually increased along the central direction far away from the tire 3, and the width of the second isosceles triangle (the distance between the two waist sides) is gradually decreased along the central direction far away from the tire 3, that is, the gradual change rule of the width of the cross section of the adjacent deformation buffer holes 301 is opposite, so that the adjacent deformation buffer holes 301 are not easily influenced by each other when deformed, but can provide enough deformation space for the adjacent deformation buffer holes 301, so that the tire 3 can be uniformly deformed.

For example, the first isosceles triangle is upright, the second isosceles triangle is inverted, and the two are distributed in an approaching parallelogram manner, so that the adjacent deformation buffer holes 301 are not easily affected by each other when deformed, and an enough deformation space can be provided for the adjacent deformation buffer holes 301, so that the tire 3 can be uniformly deformed, and the sweeper is more stable when running.

Referring to fig. 1-2, as another embodiment of the wheel assembly provided in the present application, a plurality of bosses 305 are provided on the outer circumferential surface 302 for contacting with the ground, so as to improve the grip between the tire 3 and the ground, and make the tire 3 less prone to slip. The plurality of bosses 305 are arranged in sequence along the circumferential direction of the tire 3, and the tire 3 can be in good contact with the ground when rotating to various angles, and is not easy to slip.

Referring to fig. 1-2, as another embodiment of the wheel assembly provided herein, a gap is formed between adjacent bosses 305, and when a small obstacle is encountered, the small obstacle may be located in the gap between the bosses 305, and may not affect the rotation of the tire 3, and the tire 3 is not prone to vibration and bump.

Optionally, a plurality of bosses 305 on the outer peripheral surface 302 of the tire 3 are respectively located on two circumferences, the bosses 305 on the two circumferences are arranged at intervals and staggered, when a barrier abuts against the boss 305 or a gap between the bosses 305, because the bosses 305 are staggered, the state of the barrier contacting the tire 3 at each radial position of the tire 3 cannot be completely consistent, the tire 3 cannot be easily clamped, and the tire 3 can partially rotate to overturn the barrier.

Referring to fig. 2-3, as another embodiment of the turning wheel assembly provided by the present application, a connection ring 306 is disposed on the inner circumferential surface 303, the connection ring 306 abuts between the hub 1 and the wheel cover 2, the hub 1 is connected to the wheel cover 2 through a screw 4, the connection ring 306 can be tightly clamped after the hub 1 is connected to the wheel cover 2, so as to install the tire 3 between the hub 1 and the wheel cover 2, the inner circumferential surface 303 of the tire 3 can contact with the hub 1 and the wheel cover 2, and the hub 1 and the wheel cover 2 and the inner circumferential surface 303 of the tire 3 support the tire 3.

Meanwhile, the wheel hub 1 and the wheel cover 2 are assembled in a screw 4 connection mode, so that the wheel hub and the wheel cover can be conveniently disassembled and assembled, the difficulty of mounting the tire 3 on the wheel hub 1 and the wheel cover 2 is low, and the mounting and maintenance cost is low.

Referring to fig. 4, as another embodiment of the wheel assembly provided in the present application, a limiting hole 3061 is formed in the connecting ring 306, a first limiting protrusion 101 inserted into the limiting hole 3061 is formed on the wheel hub 1, and a second limiting protrusion 201 inserted into the limiting hole 3061 is formed on the wheel cover 2. When the whole rotating wheel assembly rotates, the tire 3 directly contacts with the ground, and the first limiting bulge 101 of the wheel hub 1 and the second limiting bulge 201 of the wheel cover 2 are inserted into the limiting hole 3061 on the connecting ring 306, so that the tire 3 is not easy to slide relative to the wheel hub 1 and the wheel cover 2 after being stressed, and the rotating wheel assembly can rotate stably.

Optionally, the first limiting protrusion 101 and the second limiting protrusion 201 may be inserted into the same limiting hole 3061 at the same time, so as to achieve connection with the connecting ring 306, and clamp the connecting ring 306.

Optionally, the first limiting protrusion 101 and the second limiting protrusion 201 may be respectively inserted into different limiting holes 3061, for example, in an alternating manner, the first limiting protrusion 101 and the second limiting protrusion 201 are respectively inserted into adjacent limiting holes 3061, so as to realize connection with the connection ring 306, and clamp the connection ring 306.

Referring to fig. 2 and fig. 6, as another embodiment of the wheel assembly provided by the present application, a positioning hole 202 is formed on the wheel cover 2, a positioning post 102 inserted into the positioning hole 202 is formed on the wheel hub 1, when the wheel hub 1 and the wheel cover 2 are installed, the positioning post 102 is aligned with the positioning hole 202, and at this time, other structures between the wheel hub 1 and the wheel cover 2 are also aligned, which is convenient for operations such as locking screws.

Referring to fig. 2 and fig. 6, as another embodiment of the rotating wheel assembly provided in the present application, a connection threaded hole 103 is provided on the wheel hub 1, a connection through hole 203 is provided on the wheel cover 2, and the screw 4 penetrates through the connection through hole 203 and is in threaded connection with the connection threaded hole 103.

Please refer to fig. 2 and fig. 6, as another embodiment of the rotating wheel assembly provided in the present application, a connecting column 104 is disposed on the wheel hub 1, a connecting threaded hole 103 is disposed on the connecting column 104, a limiting ring 204 surrounding the connecting through hole 203 is disposed on the wheel cover 2, the connecting column 104 is inserted into the limiting ring 204, while the wheel hub 1 is connected with the wheel cover 2 through the screw 4, the connecting column 104 on the wheel hub 1 can be inserted into the limiting ring 204 on the wheel cover 2, so as to further improve the stability of the connection between the wheel hub 1 and the wheel cover 2.

Referring to fig. 1, as another embodiment of the wheel assembly provided in the present application, the number of the screws 4 is more than three, each screw 4 is located on the same circumference, and the three or more screws 4 connect the wheel hub 1 and the wheel cover 2 at multiple locations, so that the wheel hub 1 and the wheel cover 2 have high connection strength, and the wheel hub 1 and the wheel cover 2 are not easily loosened when the wheel assembly rotates.

Be equipped with a plurality of ring form strengthening ribs 105 on wheel hub 1, can promote wheel hub 1's intensity, the runner subassembly during operation receives great pressure and is difficult for taking place great deformation, rotation that can be stable, and then makes the comparatively stable work of machine of sweeping the floor.

The embodiment of the application further provides a sweeper, which comprises the rotating wheel assembly in any one of the embodiments.

Because the sweeper has the rotating wheel assembly in any one of the above embodiments, because the tire 3 on the rotating wheel assembly is provided with the plurality of deformation buffer holes 301, after the tire 3 is subjected to sufficient pressure, the position of the deformation buffer hole 301 at which the tire 3 is arranged can be deformed, for example, when an obstacle is encountered, after the pressure of the obstacle is received, the tire 3 is deformed, so that the rotating wheel assembly can easily pass over the obstacle. Simultaneously, tire 3 receives the pressure of barrier, takes place the deformation back, can promote the area of contact of tire 3 and ground, and the gyro wheel subassembly is difficult for skidding when blocking, can cross the barrier comparatively smoothly, and the ability that the gyro wheel subassembly also promptly climbs the barrier is crossed to further promotion.

Optionally, a plurality of deformation buffer holes 301 set gradually along the circumferencial direction of tire 3, and when the tire 3 of runner subassembly rotated to different positions and met the barrier, all can have the deformation of deformation buffer hole 301 atress emergence that corresponds, and then reduce the possibility of being blocked, promote the ability of crossing the barrier under the circumstances that promotes tire 3 and grab the land fertility.

In the embodiment of this application, through set up a plurality of deformation buffer holes 301 on tire 3 for tire 3 can take place deformation after receiving enough big pressure, and when the gyro wheel subassembly was applied to the machine of sweeping the floor, when the machine of sweeping the floor removed the blockking that in-process met the barrier, tire 3 can take place deformation, and then reduces the possibility of being stuck, makes 3 subassemblies of tire can comparatively smoothly pass through the barrier. And under the condition that tire 3 takes place deformation, can increase the area of contact with ground, promote the power of grabbing of runner subassembly, the runner subassembly is difficult for skidding, can comparatively smoothly pass through the barrier, guarantees that self has sufficient obstacle-crossing ability.

In one embodiment, the tire 3 has an outer circumferential surface 302, an inner circumferential surface 303 and two side end surfaces 304, that is, the tire 3 is cylindrical, the outer circumferential surface 302 is used for contacting with the ground, and the inner circumferential surface 303 can be provided with corresponding structures to be matched and connected with the hub 1 and the wheel cover 2, thereby completing the assembly of the wheel assembly.

The tire 3 is sunken in the side end face 304 to form a deformation buffer hole 301, the outer peripheral face 302 is in contact with the ground and can be pressed by the ground and obstacles on the ground, the inner peripheral face 303 of the tire 3 is connected with the hub 1 and the wheel cover 2, therefore, after the whole rotating wheel assembly is pressed, the structure between the two side end faces 304 is deformed, the deformation buffer hole 301 is arranged on the side end face 304, adaptive deformation can be generated when external force is applied, the deformation direction is the radial direction of the tire 3, the deformation of the tire 3 along the axial direction is not easy to cause, better contact between the tire 3 and the ground can be ensured, and the damage of the tire 3 is not easy to cause.

It can be understood that the sweeper also has the technical effect of the rotating wheel assembly in any one of the above embodiments, and the details are not repeated here.

It is to be understood that the aspects of another specific embodiment may be practiced with further modifications and equivalents in other embodiments.

It should be understood that the above examples are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims (10)

1. The rotating wheel assembly is characterized by comprising a wheel hub, a wheel cover connected with the wheel hub and a tire connected with the wheel hub and the wheel cover, wherein a plurality of deformation buffer holes are formed in the tire, and the deformation buffer holes are formed in the tire and are arranged in sequence along the circumferential direction of the tire.

2. The wheel assembly as claimed in claim 1, wherein the tire has an outer peripheral surface, an inner peripheral surface and two side end surfaces, and the tire is recessed in the side end surfaces to form the deformation buffering holes.

3. The wheel assembly of claim 2, wherein the deformation dampening holes are blind holes.

4. The wheel assembly as claimed in claim 3, wherein the deformation buffer holes are provided on both of the side end faces, and the depths of the deformation buffer holes on both of the side end faces are the same.

5. The wheel assembly according to any one of claims 1 to 3, wherein the deformation buffer holes have a cross section of an isosceles triangle, the cross sections of the adjacent deformation buffer holes are respectively a first isosceles triangle and a second isosceles triangle, the width of the first isosceles triangle is gradually increased in a direction away from the center of the tire, and the width of the second isosceles triangle is gradually decreased in a direction away from the center of the tire.

6. A wheel assembly according to any of claims 2 to 3, wherein a plurality of the bosses are provided on the outer circumferential surface, the plurality of the bosses being arranged in series in the circumferential direction of the tyre.

7. The wheel assembly of claim 6, wherein adjacent bosses have gaps therebetween, and a plurality of bosses are respectively located on two circumferences, and the bosses on the two circumferences are arranged in a staggered manner.

8. The rotating wheel assembly according to any one of claims 2 to 3, wherein a connecting ring is arranged on the inner peripheral surface, the connecting ring abuts between the wheel hub and the wheel cover, and the wheel hub and the wheel cover are connected through screws.

9. The wheel assembly as claimed in claim 8, wherein the connecting ring has a limiting hole, the hub has a first limiting protrusion inserted into the limiting hole, and the wheel cover has a second limiting protrusion inserted into the limiting hole.

10. A sweeper comprising the wheel assembly of any one of claims 1 to 9.

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