Universal wheel assembly and cleaning device having same

Abstract

Disclosed in embodiments of the present description are a universal wheel assembly and a cleaning device having same. The universal wheel assembly comprises a universal wheel support; and a universal wheel accommodated in the universal wheel support and capable of rotating around a universal wheel axle, wherein a cavity cover is arranged on the upper surface of the universal wheel support, and the cavity cover is used for sealing a cavity on the upper surface of the universal wheel support. According to the universal wheel assembly of the present disclosure, the vibration amplitude of a housing can be reduced when the universal wheel assembly collides with other objects, and the amplification effect of the cavity on sound generated by impact is reduced, thereby reducing the impact sound and realizing the noise reduction effect.

Description

Universal wheel assembly and cleaning equipment having the same CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This disclosure claims priority to Chinese patent application No. 202420187603.6 filed on January 25, 2024. The contents of the above-mentioned Chinese patent application disclosure are hereby incorporated by reference in their entirety as a part of this application. Technical Field

[0002] The present application relates to the field of smart home technology, and in particular to a universal wheel assembly and a cleaning device having the same. Background Art

[0003] Universal wheel assemblies can be installed on smart cleaning equipment to enable mobility. They can also be installed on other objects that require mobility, such as sliding doors, luggage, or other smart devices. Because universal wheels require flexible movement, the shaft and hole must fit together with clearance. However, when passing through gaps in floors or tiles, a certain impact sound is produced, resulting in relatively loud noise during operation.

[0004] Therefore, it is necessary to provide an improved universal wheel assembly and a cleaning device having the same to at least partially solve the above problems. Summary of the Invention

[0005] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention of this disclosure is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] In order to at least partially solve the above problems, according to a first aspect of the present disclosure, a universal wheel assembly is provided, comprising:

[0007] Universal wheel support;

[0008] A universal wheel, the universal wheel is accommodated in the universal wheel support and is rotatable around the universal wheel shaft;

[0009] Wherein, a cavity covering member is provided on the upper surface of the universal wheel support, and the cavity covering member is used to seal the cavity on the upper surface of the universal wheel support.

[0010] Preferably, the upper surface of the universal wheel support has a plurality of cavities, and the cavity covering member is one, and the cavity covering member is arranged on the top of the plurality of cavities.

[0011] Preferably, there are multiple cavities on the upper surface of the universal wheel support, and a cavity covering member is provided above each cavity, and each cavity covering member matches the shape and size of the corresponding cavity.

[0012] Preferably, the plurality of cavities include a universal wheel accommodating cavity, the bottom surface of the universal wheel accommodating cavity protrudes upward to form a universal wheel mounting portion, and the universal wheel is mounted in the universal wheel mounting portion;

[0013] The cavity cover is provided with a mounting notch, which corresponds to the universal wheel mounting portion and is used to avoid the universal wheel mounting portion.

[0014] Preferably, the plurality of cavities include a universal wheel accommodating cavity, the bottom surface of the universal wheel accommodating cavity protrudes upward to form a universal wheel mounting portion, and the universal wheel is mounted in the universal wheel mounting portion;

[0015] A recess is provided on the bottom surface of the cavity cover, and the recess corresponds to the universal wheel mounting portion and is used to avoid the universal wheel mounting portion.

[0016] Preferably, baffles are provided between the plurality of cavities, and a baffle slot is provided on the bottom surface of the cavity cover, and the baffle slot matches the baffle.

[0017] Preferably, the cavity cover and the universal wheel support are connected by at least one of adhesive connection, interference connection, secondary molding connection, screw connection, and clamping connection.

[0018] Preferably, the cavity cover is glued to the edge of the cavity of the universal wheel support by glue.

[0019] Preferably, the size of the cavity covering member is configured to be slightly larger than the outer diameter of the cavity of the caster support, so that the cavity covering member forms an interference fit with the cavity of the caster support.

[0020] Preferably, the cavity cover is overmolded and installed in the cavity according to the shape and size of the cavity of the universal wheel support.

[0021] Preferably, the cavity cover is directly connected to the universal wheel support by screws.

[0022] Preferably, the cavity cover is configured as a thermoplastic elastomer.

[0023] Preferably, the thickness of the cavity covering member matches the depth of the cavity and is used to fill the interior of the cavity.

[0024] Preferably, the thickness of the cavity covering member is the same as the depth of the cavity, or the difference between the thickness of the cavity covering member and the depth of the cavity is within a preset range.

[0025] According to a second aspect of the present disclosure, a cleaning device is provided, comprising a universal wheel assembly as described in any one of the above embodiments, wherein the universal wheel assembly is arranged at the bottom of the cleaning device.

[0026] The universal wheel assembly and the cleaning device having the same provided in the embodiments of this specification have the following technical effects:

[0027] The universal wheel assembly provided in the embodiment of this specification provides a cavity cover on the universal wheel support seat, and uses the cavity cover to seal the cavity on the upper surface of the universal wheel support seat, thereby reducing the amplitude of the shell of the universal wheel assembly when it collides with other objects, reducing the amplification effect of the cavity on the sound generated by the impact, reducing the impact sound, and achieving the effect of shock absorption and noise reduction.

[0028] With reference to the following description and drawings, specific embodiments of the present disclosure are disclosed in detail, indicating the manner in which the principles of the present disclosure can be employed. It should be understood that the disclosed embodiments are not limited in scope thereby. Within the spirit and scope of the appended claims, the embodiments of the present disclosure include many variations, modifications, and equivalents. Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions and advantages of the embodiments of this specification or the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] FIG1 is a schematic diagram of the three-dimensional structure of a universal wheel assembly provided in one embodiment of this specification;

[0031] FIG2 is a front view of a universal wheel assembly provided by one embodiment of this specification;

[0032] FIG3 is a schematic diagram of the three-dimensional structure of a universal wheel assembly with a cavity cover provided in one embodiment of this specification;

[0033] FIG4 is a schematic perspective view of a universal wheel assembly with a cavity cover according to another embodiment of the present disclosure;

[0034] FIG5 is a schematic perspective view of a universal wheel assembly with multiple cavity covers according to an embodiment of the present disclosure;

[0035] FIG6 is a schematic perspective view of a universal wheel assembly with multiple cavity covers according to another embodiment of the present disclosure;

[0036] FIG7 is a schematic structural diagram of a cleaning device with a universal wheel assembly provided in one embodiment of this specification.

[0037] Description of reference numerals:

[0038] 10. Caster support; 101. Cavity; 102. Caster mounting portion; 103. Cavity cover; 20. Caster; 201. Caster shaft; 1011. Caster accommodating cavity; 1012. Baffle; 30. Rotating shaft; 40. Caster assembly; 50. Cleaning equipment. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the embodiments described are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this specification.

[0040] It should be noted that the terms "first", "second", etc. in the description and claims of the embodiments of this specification and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of this specification described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0041] In the embodiments of this specification, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the embodiments of this specification.

[0042] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the field of the present disclosure. The terms used herein are only for the purpose of describing specific implementations and are not intended to limit the present disclosure. Terms such as "parts" and "components" appearing herein may refer to either a single part or a combination of multiple parts. Terms such as "installation" and "setting" appearing herein may refer to either a component being directly attached to another component or a component being attached to another component through an intermediate component. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0043] 1 to 6 , the embodiments of this specification may provide a universal wheel assembly, which may be used in equipment that needs to move, such as cleaning equipment, sliding doors, and luggage.

[0044] As shown in Figures 1 and 2, the universal wheel assembly provided in some embodiments of the present specification may include a universal wheel support 10 and a universal wheel 20. As shown in Figure 2, a universal wheel shaft 201 is provided in the universal wheel 20, and both ends of the universal wheel shaft 201 can be connected to the universal wheel support 10. The universal wheel 20 can be installed on the universal wheel shaft 201, and then the universal wheel 20 is installed in the universal wheel support 10. The universal wheel 20 can rotate around the universal wheel shaft 201, thereby realizing the function of moving and walking.

[0045] As shown in FIG1 , a cavity 101 is generally formed on the upper surface of the universal wheel support 10. The universal wheel assembly may collide with other obstacles during movement, such as when passing through gaps in the floor or tiles. Due to the clearance between the holes of the universal wheel shaft, the universal wheel support will produce an impact sound. The cavity 101 on the universal wheel support 10 amplifies this impact sound, thereby increasing the impact sound produced by the universal wheel assembly. As shown in FIG3 , in some embodiments of the present specification, a cavity cover 103 may be provided on the upper surface of the universal wheel support 10. The cavity cover 103 may be provided above the cavity 101 on the upper surface of the universal wheel support 10 to seal the cavity 101 on the upper surface of the universal wheel support 10. In this way, when the universal wheel 20 collides with other objects, the amplitude of the shell of the universal wheel support 10 is reduced, and the amplification effect of the cavity 101 on the impact sound is reduced, thereby achieving the effect of shock absorption and noise reduction.

[0046] The cavity cover 103 can be made of an elastic material to enhance vibration and noise reduction. Furthermore, a lightweight material can be selected to minimize the overall weight of the caster assembly. For example, thermoplastic elastomers such as rubber, elastic plastic, elastic foam, or potting compound can be selected. The specific material can be selected based on actual needs and is not specifically limited in this specification.

[0047] In addition, in some embodiments of the present specification, a detachable connection method can be adopted between the cavity cover 103 and the universal wheel support 10, and the connection method can be any one of adhesive connection, interference connection, secondary molding connection, screw connection, and clamping connection. These connection methods can facilitate the installation and disassembly of the cavity cover 103, and at the same time, there is no need to make too many changes to the structure of the universal wheel assembly. For example: use glue to glue the cavity covering part 103 to the edge of the cavity 101 in the universal wheel support 10; or, design the size of the cavity covering part 103 to be slightly larger than the outer diameter of the cavity 101 in the universal wheel support 10, so that the cavity covering part 103 can be interference connected with the cavity 101 in the universal wheel support 10; or, according to the shape and size of the cavity 101 in the universal wheel support 10, the cavity covering part 103 is secondary molded and installed in the cavity 101; or, directly use screws to connect the cavity covering part 103 to the universal wheel support 10; or, provide a slot in the inner wall of the cavity 101 of the universal wheel support 10, and provide a matching protrusion on the outer edge of the cavity covering part 103, and utilize the cooperation between the protrusion on the cavity covering part 103 and the slot in the cavity 101 to clamp the cavity covering part 103 and the universal wheel support 10 together.

[0048] Among them, the connection method between the cavity cover 103 and the universal wheel support 10 can be selected according to the material of the cavity cover 103 and the actual usage scenario, or it can be a combination of multiple connection methods. The embodiments of this specification do not make specific limitations on this.

[0049] In some embodiments of the present specification, the thickness of the cavity cover 103 can match the depth of the cavity 101 in the universal wheel support 10. As shown in Figure 1, there may be multiple cavities 101. When the depths of different cavities 101 are different, the thickness of the cavity cover 103 at the corresponding position can be adjusted. In this way, after the cavity cover 103 is installed in the universal wheel support 10, the cavity 101 can be filled. The cavity cover 103 can be made of elastic material, which can facilitate the installation of the cavity cover 103 and prevent the cavity cover 103 from colliding with the inner wall of the cavity 101 when the universal wheel 20 collides with other objects, thereby increasing the shock absorption effect of the universal wheel support 10 shell, thereby reducing the impact sound generated when the universal wheel assembly collides, and achieving the effect of shock absorption and noise reduction.

[0050] The thickness of the cavity cover 103 can match the depth of the cavity 101 in the caster support 10. This can be understood as the thickness of the cavity cover 103 being the same as the depth of the cavity 101 in the caster support 10, or the difference between the thickness of the cavity cover 103 and the depth of the cavity 101 being within a preset range, thereby facilitating the installation of the cavity cover 103. Of course, the shape and size of the cavity cover 103 also match those of the cavity 101 in the caster support 10 to achieve the purpose of sealing the cavity 101.

[0051] As shown in FIG1 , the embodiment of the present specification generally has multiple cavities 101 on the universal wheel support 10, such as three as shown in FIG1 . Of course, the number can also be two, four, or other numbers depending on the actual situation. As shown in FIG3 , in some embodiments of the present specification, a cavity cover 103 can be provided, that is, a single cavity cover 103 can be provided. This cavity cover 103 can be provided on top of multiple cavities 101 , so that multiple cavities 101 can be enclosed together to achieve the effect of shock absorption and noise reduction. As shown in FIG3 , in this scenario, the size of the cavity cover 103 can be the same as the size of the upper surface of the universal wheel support 10 . In order to better fill the cavities 101 , the shape, size, and thickness of the lower surface of the cavity cover 103 can be set according to the shape and size of the multiple cavities 101 in the universal wheel support 10 , so that the cavity cover 103 can well fill each cavity 101, thereby minimizing the amplitude of the shell when the universal wheel assembly collides, thereby reducing the impact sound. For example: baffles are provided between the multiple cavities 101 in Figure 1, so according to the size of each cavity 101, baffle slots can be provided on the lower surface of the cavity cover 103 at a position corresponding to the baffle, and the area other than the baffle slots can be set to a certain thickness according to the depth of the cavity 101 to fill the cavity 101. When the cavity cover 103 is installed on the universal wheel support 10, the baffle slots can be aligned with the baffle of the cavity 101 to facilitate installation, and the multiple cavities 101 can be sealed as a whole.

[0052] As shown in FIG1 , among the multiple cavities 101 on the universal wheel support 10, a universal wheel 20 is mounted below one cavity 101, and this cavity 101 can serve as a universal wheel accommodating cavity 1011. As shown in FIG1 , the bottom surface of the universal wheel accommodating cavity 1011 where the universal wheel 20 is located is raised upward to form a universal wheel mounting portion 102, and the universal wheel 20 can be mounted within the universal wheel mounting portion 102. As shown in FIG1 and FIG2 , under normal circumstances, the universal wheel mounting portion 102 is higher than the bottom surfaces of the other cavities 101, and may even be higher than the upper surface of the universal wheel support 10. If a single, all-inclusive cavity cover 103 is used, it cannot be guaranteed that the upper surface of the cavity cover 103 is in the same plane, or the height of the cavity cover 103 needs to be increased to cover the universal wheel mounting portion 102, which increases the processing difficulty and also affects the overall aesthetics of the universal wheel assembly.

[0053] As shown in FIG4 , in some embodiments of the present specification, a mounting notch can be provided on the cavity cover 103. The mounting notch matches the shape and size of the universal wheel mounting portion 102 and is positioned above the universal wheel mounting portion 102. Thus, when the cavity cover 103 is mounted on the universal wheel support 10, the mounting notch of the cavity cover 103 can be aligned with the universal wheel mounting portion 102. This not only facilitates installation but also avoids increased difficulty in machining the cavity cover 103 due to differences in height and shape at the universal wheel mounting portion 102.

[0054] When there are multiple cavities 101 on the universal wheel support 10, and the bottom surface of one universal wheel accommodating cavity 1011 is raised upward to form a universal wheel mounting portion 102, the universal wheel 20 can be installed in the universal wheel mounting portion 102. As shown in Figure 3, in other embodiments of this specification, a cavity cover 103 can be provided to cover all cavities 101, and the upper surface of the cavity cover 103 is a plane. At the same time, a recess can be provided on the bottom surface of the cavity cover 103. The position of the recess can correspond to the universal wheel mounting portion 102 and can be used to avoid the universal wheel mounting portion 102. In this way, even if the height of the universal wheel mounting portion 102 is higher than the bottom surface of other cavities 101, the cavity cover 103 can cover and seal all cavities 101 including the universal wheel mounting portion 102, so as not to affect the appearance of the universal wheel assembly.

[0055] In addition, as shown in FIG1 , when there are multiple cavities 101 on the universal wheel support 10, baffles 1012 are provided between each cavity 101 to increase the stability of the structure. In this scenario, when a cavity cover 103 is provided to seal and fill all cavities 101, baffle slots can be provided on the bottom surface of the cavity cover 103. The baffle slots match the baffles 1012. That is, the number, position, size, and shape of the baffle slots can be set according to the number, position, size, and shape of the baffles 1012 between each cavity 101. In Figure 1, three baffles 1012 are set between the three cavities 101, so three baffle slots can be set at the positions corresponding to the bottom surface of the cavity cover 103 and the baffles 1012. The shape and size of each baffle slot can match the corresponding baffle 1012. In this way, when the cavity cover 103 is installed on the universal wheel support 10, the baffle slot can be aligned with the corresponding baffle 1012, so that the cavity cover 103 can better seal and fill each cavity 101 and facilitate installation.

[0056] As shown in Figures 5 and 6, in some embodiments of the present specification, if there are multiple cavities 101 on the universal wheel support 10, a cavity cover 103 can be set separately for each cavity 101, and each cavity cover 103 is set above the corresponding cavity 101, and the shape and size of each cavity cover 103 match the corresponding cavity 101, such as: according to the shape and depth of the corresponding cavity 101, the shape and thickness of the corresponding cavity cover 103 are set, so as to achieve the purpose of filling and sealing each cavity 101 separately, thereby reducing the amplitude of the shell when the universal wheel assembly collides and reducing the impact sound.

[0057] As described in the above embodiment, among the multiple cavities 101 on the universal wheel support 10, a universal wheel 20 is mounted below one cavity 101. This cavity 101 can serve as a universal wheel accommodating cavity 1011. The bottom surface of the universal wheel accommodating cavity 1011 protrudes upward to form a universal wheel mounting portion 102, and the universal wheel 20 can be mounted within the universal wheel mounting portion 102. Typically, the universal wheel mounting portion 102 is higher than the bottom surfaces of the other cavities 101, and may even be higher than the upper surface of the universal wheel support 10.

[0058] Preferably, in some embodiments, as shown in FIG6 , a cavity cover 103 is provided above each cavity 101 on the universal wheel support 10, and a mounting notch can be provided on the cavity cover 103 corresponding to the cavity 101 where the universal wheel mounting portion 102 is located (i.e., the universal wheel accommodating cavity 1011). The mounting notch matches the shape and size of the universal wheel mounting portion 102 and is used to avoid the universal wheel mounting portion 102. In this way, the cavity cover 103 corresponding to the universal wheel accommodating cavity 1011 can seal the portion of the universal wheel accommodating cavity 1011 except the universal wheel mounting portion 102, and maintain the upper surface of the cavity cover 103 on the same plane as the other cavities 101, without affecting the appearance of the universal wheel assembly. The shape and size of the other cavity covers 103 can match the corresponding cavity 101, and are not specifically limited in the embodiments of this specification.

[0059] As shown in Figure 5, multiple cavity covers 103 can be provided on the universal wheel support 10. The multiple cavity covers 103 can cover the cavity 101, and the upper surfaces of the multiple cavity covers 103 are flush. When the bottom surface of the universal wheel accommodating cavity 1011 protrudes upward to form a universal wheel mounting portion 102, the universal wheel mounting portion 102 is generally higher than the bottom surfaces of other cavities 101, which will cause the upper surfaces of each cavity 101 to be not in the same plane. In some embodiments of this specification, a recess can be provided on the lower surface of the cavity cover 103 corresponding to the universal wheel accommodating cavity 1011. The position of the recess can correspond to the universal wheel mounting portion 102, so that the cavity cover 103 corresponding to the universal wheel accommodating cavity 1011 can avoid the universal wheel mounting portion 102 through the recess. Compared to the example shown in FIG6 , the cavity cover 103 corresponding to the universal wheel accommodating cavity 1011 in FIG5 can not only cover and seal the universal wheel accommodating cavity 1011, but also have its upper surface flush with the upper surface of the other cavity cover 103, making the overall appearance of the universal wheel assembly more neat and not affecting the aesthetics of the universal wheel assembly. The shape and size of the other cavity cover 103 can match the corresponding cavity 101, and this embodiment of the specification does not specifically limit them.

[0060] The present disclosure also provides a cleaning device, which can be an intelligent sweeper, an intelligent mop, etc. The cleaning device includes a device body, which is generally approximately circular in shape, but may also have other shapes. As shown in FIG7 , a universal wheel assembly 40 is generally mounted on the bottom of the device body of the cleaning device 50, and is used to support the cleaning device 50 and adjust the direction of the cleaning device 50 during travel. As shown in FIG1 to FIG6 , a rotating shaft 30 may also be provided on the universal wheel assembly, and a related connecting member may be provided on the rotating shaft 30, so that the universal wheel assembly is mounted on the bottom of the device body of the cleaning device via the rotating shaft 30.

[0061] Obviously, the embodiments described above are only part of the embodiments of this specification, not all of them. Based on the embodiments of this specification, ordinary technicians in this field can make other different forms of changes or modifications without making any creative work, which should fall within the scope of protection of the embodiments of this specification.

[0062] Those skilled in the art will readily appreciate other implementations of the embodiments of this specification after considering the specification and practicing the disclosure herein. This specification is intended to cover any variations, uses, or adaptations of the embodiments of this specification that follow the general principles of the embodiments of this specification and include common knowledge or customary techniques in the art not disclosed in the embodiments of this specification. The description and examples are to be considered as exemplary only, and the true scope and spirit of the embodiments of this specification are indicated by the following claims.

[0063] It should be understood that the embodiments of the present invention are not limited to the precise structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the embodiments of the present invention is limited only by the appended claims.

Claims

1. A swivel wheel assembly, characterized in that, Comprising: A universal wheel support (10); A universal wheel (20), which is accommodated in the universal wheel support (10) and is rotatable about a universal wheel shaft (201); Wherein, a cavity cover (103) is provided on the upper surface of the universal wheel support (10), and the cavity cover (103) is used to seal a cavity (101) on the upper surface of the universal wheel support (10).

2. The caster assembly according to claim 1, wherein, The number of cavities (101) on the upper surface of the universal wheel support (10) is multiple, the cavity cover (103) is one, and the cavity cover (103) is arranged on top of the multiple cavities (101).

3. The swivel wheel assembly according to claim 1, wherein, The number of cavities (101) on the upper surface of the universal wheel support (10) is multiple, and a cavity cover (103) is respectively provided above each cavity (101), and each cavity cover (103) matches the shape and size of the corresponding cavity (101).

4. The swivel wheel assembly according to claim 2 or 3, wherein, Among the multiple cavities (101) includes a universal wheel accommodation cavity (1011), and a universal wheel mounting portion (102) is formed by upward protrusion on the bottom surface of the universal wheel accommodation cavity (1011), and the universal wheel (20) is mounted in the universal wheel mounting portion (102); An installation notch is provided on the cavity cover (103), and the installation notch corresponds to the universal wheel mounting portion (102) for avoiding the universal wheel mounting portion (102).

5. The swivel wheel assembly according to claim 2 or 3, wherein, Among the multiple cavities (101) includes a universal wheel accommodation cavity (1011), and a universal wheel mounting portion (102) is formed by upward protrusion on the bottom surface of the universal wheel accommodation cavity (1011), and the universal wheel (20) is mounted in the universal wheel mounting portion (102); A concave portion is provided on the bottom surface of the cavity cover (103), and the concave portion corresponds to the universal wheel mounting portion (102) for avoiding the universal wheel mounting portion (102).

6. The swivel wheel assembly according to claim 2, wherein, A baffle (1012) is provided between the multiple cavities (101), and a baffle card slot is provided on the bottom surface of the cavity cover (103), and the baffle card slot matches the baffle (1012).

7. The caster assembly according to claim 1, wherein The connection manner between the cavity cover (103) and the universal wheel support (10) is at least one of adhesive connection, interference connection, secondary forming connection, screw connection, and snap connection.

8. The caster assembly according to claim 1, wherein, The cavity cover (103) and the edge of the cavity (101) of the universal wheel support (10) are glued together by glue.

9. The swivel wheel assembly according to claim 1, wherein, The size of the cavity cover (103) is configured to be slightly larger than the outer diameter of the cavity (101) of the universal wheel support (10), so that an interference connection is formed between the cavity cover (103) and the cavity (101) of the universal wheel support (10).

10. The caster assembly according to claim 1, wherein, According to the shape and size of the cavity (101) of the universal wheel support (10), the cavity cover (103) is secondarily formed and installed in the cavity (101).

11. The caster assembly according to claim 1, wherein, The cavity cover (103) is directly connected to the universal wheel support (10) by screws.

12. The caster assembly according to claim 1, wherein, The cavity cover (103) is made of thermoplastic elastomer.

13. The swivel wheel assembly according to claim 1, wherein, The thickness of the cavity cover (103) matches the depth of the cavity (101) and is used to fill the interior of the cavity (101).

14. The swivel wheel assembly according to claim 9, wherein, The thickness of the cavity cover (103) is the same as the depth of the cavity (101), or the difference between the thickness of the cavity cover (103) and the depth of the cavity (101) is within a preset range.

15. A cleaning device, characterized in that, The cleaning device includes the universal wheel assembly according to any one of claims 1-14, and the universal wheel assembly is arranged at the bottom of the cleaning device.

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