Floor brush

Abstract

The application relates to a floor brush for cleaning equipment, which comprises a shell provided with a first mounting cavity, an opening arranged at the bottom side of the first mounting cavity, and a wheel assembly mounted in the first mounting cavity. The wheel assembly has a rolling surface and two first end ring surfaces arranged opposite to each other along the axial direction of the wheel assembly. The two first end ring surfaces are respectively connected with the two ends of the rolling surface. The rolling surface and the first end ring surface of the wheel assembly partially extend out of the opening of the first mounting cavity. The gap between the side wall of the opening and the wheel assembly is a first gap. The gap between the rolling surface located in the first mounting cavity and the cavity wall of the first mounting cavity is a second gap. The gap between the first end ring surface located in the first mounting cavity and the cavity wall of the first mounting cavity is a third gap. The size of the second gap is larger than that of the first gap. The size of the third gap is larger than that of the first gap. The second gap and the third gap can accommodate a larger amount of hair, and the risk of hair blocking the wheel assembly can be reduced.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment, and in particular to a floor brush. Background Technology

[0002] With the development of society and the economy and the improvement of family living standards, cleaning equipment is being used more and more widely in daily life. In related technologies, small wheels, or wheel assemblies, are installed on the floor brushes of cleaning equipment to facilitate easier movement. However, during use, the wheel assemblies are prone to jamming.

[0003] In addition, in some cases, the floor brush may become unstable during movement, reducing the user experience. Utility Model Content

[0004] Given the problem of wheel assemblies easily getting stuck, it is necessary to provide an effective way to prevent the wheel assemblies on the ground brush from getting stuck.

[0005] On one hand, this application provides a floor brush for cleaning equipment, the floor brush comprising:

[0006] The housing, wherein the housing is provided with a first mounting cavity; the bottom side of the first mounting cavity is provided with an opening; and

[0007] A wheel assembly is installed in the first mounting cavity; the wheel assembly has a rolling surface and two first end ring surfaces arranged opposite to each other along the axial direction of the wheel assembly; the two first end ring surfaces are respectively connected to the two ends of the rolling surface; the rolling surface and the first end ring surfaces of the wheel assembly both partially extend out of the opening of the first mounting cavity;

[0008] Wherein, the gap between the sidewall of the opening and the wheel assembly is the first gap; the gap between the rolling surface located in the first mounting cavity and the cavity wall of the first mounting cavity is the second gap; the gap between the first end annular surface located in the first mounting cavity and the cavity wall of the first mounting cavity is the third gap; the size of the second gap is greater than the size of the first gap; the size of the third gap is greater than the size of the first gap.

[0009] Optionally, the size of the first gap is less than or equal to 1 mm;

[0010] And / or, the size of the second gap falls within the range of 0.2mm to 2mm;

[0011] And / or, the size of the third gap falls within the range of 0.2mm to 2mm;

[0012] And / or, the size of the second gap is equal to the size of the third gap.

[0013] Optionally, the wheel assembly includes:

[0014] axle;

[0015] A wheel body is located outside the axle; the wheel body and the axle are coaxial.

[0016] The first bearing shell covers one end of the wheel axle and is fixedly disposed in the first mounting cavity; and

[0017] The second bearing shell covers the other end of the wheel axle and is fixedly disposed in the first mounting cavity;

[0018] The first bearing bush includes a first dustproof ring, which is in clearance fit with the end face of the corresponding end of the wheel body; the second bearing bush includes a second dustproof ring, which is in clearance fit with the end face of the corresponding end of the wheel body; the first dustproof ring extends out of the opening, and the second dustproof ring extends out of the opening.

[0019] Optionally, the wheel assembly further includes a rubber-coated ring sleeved on the wheel body; along the radial direction of the wheel body, both the first dustproof ring and the second dustproof ring are located inside the rubber-coated ring and are in clearance fit with the rubber-coated ring; along the axial direction of the wheel body, the rubber-coated ring extends to both sides, and the rubber-coated ring at least covers the gap between the first dustproof ring of the first bearing and the wheel body, and the rubber-coated ring at least covers the gap between the second dustproof ring of the second bearing and the wheel body.

[0020] Optionally, the first bearing bush includes a third dustproof ring that engages with the first dustproof ring; along the axial direction of the wheel body, the first dustproof ring is located between the third dustproof ring and the second dustproof ring; the third dustproof ring has a first fitting ring surface that fits against the cavity wall of the first mounting cavity; along the axial direction of the wheel body, the height of the first fitting ring surface is greater than 0.

[0021] The second bearing bush includes a fourth dustproof ring that engages with the second dustproof ring; along the axial direction of the wheel body, the second dustproof ring is located between the first dustproof ring and the fourth dustproof ring; the fourth dustproof ring has a second mating ring surface that fits against the cavity wall of the first mounting cavity; along the axial direction of the wheel body, the height of the second mating ring surface is greater than 0.

[0022] Optionally, the third dustproof ring is conical; and / or, the fourth dustproof ring is conical.

[0023] Optionally, the wheel body has a second end ring surface at one end near the first bearing; the inner side of the third dustproof ring abuts against the second end ring surface; along the axial direction of the wheel body, the height of the inner side of the third dustproof ring is greater than the height of the second end ring surface;

[0024] And / or, the end of the wheel body near the second bearing is provided with a third end ring surface; the inner side of the fourth dustproof ring abuts against the third end ring surface; along the axial direction of the wheel body, the height of the inner side of the fourth dustproof ring is greater than the height of the third end ring surface.

[0025] Optionally, the first bearing bush is provided with a first anti-rotation part, and the cavity wall of the first mounting cavity is provided with a second anti-rotation part that matches the first anti-rotation part;

[0026] The second bearing bush is provided with a third anti-rotation part, and the cavity wall of the first mounting cavity is provided with a fourth anti-rotation part that matches the third anti-rotation part.

[0027] Optionally, the housing includes a lower shell and a pressure cover; the pressure cover is detachably connected to the lower shell; the lower shell and the pressure cover form the first mounting cavity; the opening is provided on the pressure cover.

[0028] Optionally, the wheel assembly includes:

[0029] Wheel and axle; and

[0030] A wheel body is fitted onto the axle; the wheel body and the axle are integrally formed.

[0031] In several embodiments provided in this application, the sizes of the second and third gaps are both larger than the size of the first gap, increasing the amount of hair that the second and third gaps can accommodate. Therefore, even if hair enters the second and / or third gaps through the first gap, the risk of hair jamming the wheel assembly can be reduced.

[0032] In some embodiments, both the first and second bearings are fixedly disposed within the first mounting cavity, meaning that the sidewalls of the first and second bearings with opposite openings are fixed when the wheel assembly is operating. Therefore, when hair enters the first gap corresponding to the first and second bearings, the hair can only enter the first mounting cavity due to its own inertia or the pushing action of other hairs entering the first gap. In other words, the rotation of the wheel in the wheel assembly will not drive hair into the first mounting cavity, reducing the risk of hair entering the second and third gaps.

[0033] In some embodiments, both the first bearing and the second bearing are fixedly disposed within the first mounting cavity. When the wheel assembly is in operation, the sidewalls of the openings of the first and second bearings are fixed, reducing friction on nearby hair, reducing the generation of static electricity in nearby hair, and thus reducing the risk of hair adhering to the wheel assembly or the structure around the wheel assembly due to static electricity, and reducing the risk of hair entering the second and third gaps.

[0034] In some embodiments, the arrangement of the first and second bearings can fill part of the area between the wheel body and the opening sidewall, reducing the risk of hair entering the first mounting cavity and reducing the risk of the wheel assembly getting stuck.

[0035] In some embodiments, the wheel assembly further includes a rubber-coated ring fitted onto the wheel body. The rubber-coated ring is elastic and can mitigate vibrations during wheel rotation, improving the stability of the floor brush during movement.

[0036] In some embodiments, the wheel assembly further includes a rubber-coated ring fitted onto the wheel body. Along the radial direction of the wheel body, both the first and second dustproof rings are located inside the rubber-coated ring and are clearance-fitted with it. Along the axial direction of the wheel body, the rubber-coated ring extends to both sides, at least covering the gap between the first dustproof ring of the first bearing and the wheel body, and at least covering the gap between the second dustproof ring of the second bearing and the wheel body. Therefore, the gap between the first dustproof ring of the first bearing and the wheel body is blocked by the rubber-coated ring to reduce the risk of hair entering and the risk of the wheel assembly jamming. Similarly, the gap between the second dustproof ring of the second bearing and the wheel body is blocked by the rubber-coated ring to reduce the risk of hair entering and the risk of the wheel assembly jamming. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a floor brush provided in one embodiment of this application.

[0038] Figure 2 for Figure 1 The diagram shows a structural schematic of the brush from another perspective.

[0039] Figure 3 for Figure 2 MM-directed sectional view.

[0040] Figure 4 for Figure 3 A magnified view of part A in the image.

[0041] Figure 5 for Figure 2 NN-direction cross-sectional view.

[0042] Figure 6 for Figure 5 A magnified view of part B in the image.

[0043] Figure 7 for Figure 3 PP sectional view.

[0044] Figure 8 for Figure 7 A magnified view of part C.

[0045] Figure 9 for Figure 3 A cross-sectional view of the hidden wheel component.

[0046] Figure 10 for Figure 9 A magnified view of part of D.

[0047] Figure 11 for Figure 3 A sectional view of QQ.

[0048] Figure 12 for Figure 11 A magnified view of part E in the image.

[0049] Figure 13 for Figure 2 A schematic diagram of the middle wheel assembly.

[0050] Figure 14 for Figure 13 Mid-wheel assembly along Figure 2 The cross-sectional view along the MM direction is shown.

[0051] Figure 15 for Figure 14 Cross-sectional view of the first and second bearing bushes.

[0052] Figure 16 for Figure 15 A cross-sectional view of the structure shown from another perspective.

[0053] Explanation of reference numerals in the attached figures

[0054] 100. Floor brush; 110. Housing; 111. First mounting cavity; 1111. Opening; 1112. Second anti-rotation part; 1113. Fourth anti-rotation part; 112. Lower shell; 113. Pressure cap; 114. Upper shell; 120. Wheel assembly; 121. Rolling surface; 122. First end annular surface; 123. Wheel axle; 124. Wheel body; 1241. Second end annular surface; 1242. Third end annular surface; 125. First bearing shell; 125 1. First dustproof ring; 1252. Third dustproof ring; 1253. First mating ring surface; 1254. First anti-rotation part; 126. Second bearing shell; 1261. Second dustproof ring; 1262. Fourth dustproof ring; 1263. Second mating ring surface; 1264. Third anti-rotation part; 127. Rubber-coated ring; 01. First gap; 02. Second gap; 03. Third gap; aa. Axial direction of wheel body / wheel assembly; bb. Radial direction of wheel body. Specific Implementation

[0055] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0056] Researchers have discovered that in traditional cleaning equipment, the floor brush housing has a first mounting cavity for installing the wheel assembly. The bottom of this cavity has an opening so that the rolling surface of the wheel assembly extends out of the cavity. Hair can easily pass through the gap between the side wall of the opening in the first mounting cavity and the wheel assembly, entering the space between the wheel assembly and the inner wall of the cavity. After continuous use, hair accumulates between the wheel assembly and the inner wall of the cavity. When the hair accumulates to a certain extent, it causes the wheel assembly to jam.

[0057] Furthermore, the researchers discovered that the locations where hair accumulation and jamming occurred were mostly concentrated in the gap between the rolling surface of the wheel assembly and the inner wall of the first mounting cavity, or the gap between the end ring surface of the wheel assembly that connects with the rolling surface and the inner wall of the first mounting cavity.

[0058] Based on this, researchers have provided a floor brush where the gap between the rolling surface of the wheel assembly and the inner wall of the first mounting cavity (referred to as the "second gap"), and the gap between the end ring surface of the wheel assembly that connects to the rolling surface and the inner wall of the first mounting cavity (referred to as the "third gap"), are both larger than the gap between the side wall of the opening of the first mounting cavity and the wheel assembly (referred to as the "first gap"). This increases the amount of hair that the second and third gaps can accommodate. Therefore, even if hair enters the second and / or third gaps through the first gap, the risk of hair jamming the wheel assembly can be reduced.

[0059] Understandably, in this application, "wheel assembly jammed" refers to the fact that the rotating structure within the wheel assembly is unable to rotate.

[0060] See Figures 1 to 16This application provides an embodiment of a floor brush 100 for use in cleaning equipment. The floor brush 100 includes a housing 110 and a wheel assembly 120. The housing 110 has a first mounting cavity 111. The bottom side of the first mounting cavity 111 has an opening 1111. The wheel assembly 120 is mounted in the first mounting cavity 111 and includes a rolling surface 121 and two first end annular surfaces 122 arranged opposite to each other along the axial direction aa of the wheel assembly 120. The two first end annular surfaces 122 are respectively connected to both ends of the rolling surface 121. Both the rolling surface 121 and the first end annular surfaces 122 of the wheel assembly 120 partially extend out of the opening 1111 of the first mounting cavity 111. The gap between the sidewall of the opening 1111 and the wheel assembly 120 is a first gap O1. The gap between the rolling surface 121 located within the first mounting cavity 111 and the cavity wall of the first mounting cavity 111 is a second gap O2. The gap between the first end annular surface 122 located within the first mounting cavity 111 and the cavity wall of the first mounting cavity 111 is the third gap 03. The size of the second gap 02 is larger than the size of the first gap 01. The size of the third gap 03 is larger than the size of the first gap 01.

[0061] It is understandable that the size of the first gap 01 refers to... Figure 4 and Figure 6 L1 in the middle. The size of the second gap 02 refers to L1. Figure 4 and Figure 6 L2 in the middle. The size of the third gap 03 refers to... Figure 4 L3 in the middle.

[0062] Understandably, see Figure 4 , Figure 6 and Figure 8 The sidewalls of the opening 1111 are spaced apart from the wheel assembly 120 to avoid affecting the operation of the wheel assembly 120. The gap between the sidewalls of the opening 1111 and the wheel assembly 120 is the first gap 01. In other words, the first gap 01 is annular.

[0063] It is understood that the second gap 02 is the gap between the rolling surface 121 located within the first mounting cavity 111 and the cavity wall of the first mounting cavity 111; wherein, the cavity wall of the first mounting cavity 111 refers to the portion opposite to the rolling surface 121. Similarly, the third gap 03 is the gap between the first end annular surface 122 located within the first mounting cavity 111 and the cavity wall of the first mounting cavity 111; wherein, the cavity wall of the first mounting cavity 111 refers to the portion opposite to the first end annular surface 122 located within the first mounting cavity 111.

[0064] The size of the second gap 02 and the third gap 03 in the aforementioned floor brush 100 are both larger than the size of the first gap 01, increasing the amount of hair that the second gap 02 and the third gap 03 can accommodate. Therefore, even if hair enters the second gap 02 and / or the third gap 03 through the first gap 01, the risk of hair jamming the wheel assembly 120 is reduced, thereby improving the operator's user experience and reducing maintenance costs and frequency.

[0065] Furthermore, the second gap 02 and the third gap 03 are set relatively large, thus facilitating the movement of hair within the gaps after it enters them. In some cases, driven by the wheel assembly 120, the hair can move from the second gap 02 and / or the third gap 03 to the first gap 01, and then exit from the opening 1111 of the first mounting cavity 111. The reduction in hair remaining in the second gap 02 and / or the third gap 03 lowers the risk of the wheel assembly 120 jamming.

[0066] Furthermore, the second gap 02 and the third gap 03 are set to be relatively large, which reduces the risk of friction between the wheel assembly 120 and the inner wall of the first mounting cavity 111, and reduces the risk of obstructing the operation of the wheel assembly 120.

[0067] Optionally, the size of the first gap 01 is less than or equal to 1 mm to reduce the risk of hair entering the first mounting cavity 111 through the first gap 01, thereby reducing the risk of the wheel assembly 120 getting stuck.

[0068] In addition, the size of the first gap 01 is relatively small. When hair tries to enter the first gap 01, the probability of the hair being blocked by the side wall of the first gap 01 is relatively high, which reduces the risk of the hair entering the second gap 02 and the third gap 03.

[0069] In this embodiment, the size of the first gap 01 remains consistent at different positions. It is understood that in other embodiments, the size of the first gap 01 at different positions may not be entirely the same.

[0070] Optionally, the size of the second gap 02 falls within the range of 0.2mm to 2mm, so as to reduce the space occupied by the first mounting cavity 111 while better reducing the risk of the wheel assembly 120 jamming, which facilitates the miniaturization design of the floor brush 100 and reduces the spatial interference between the first mounting cavity 111 and other structures in the floor brush 100.

[0071] In this embodiment, see Figure 6 The second gap 02 is an annular shape with a notch. The notch corresponds to the opening 1111 of the first mounting cavity 111.

[0072] In this embodiment, the size of the second gap 02 is the same at different positions. It is understood that in other embodiments, the size of the second gap 02 at different positions may not be exactly the same.

[0073] Optionally, the size of the third gap 03 falls within the range of 0.2mm to 2mm, so as to reduce the space occupied by the first mounting cavity 111 while better reducing the risk of the wheel assembly 120 jamming, which facilitates the miniaturization design of the floor brush 100 and reduces the spatial interference between the first mounting cavity 111 and other structures in the floor brush 100.

[0074] In this embodiment, the portions of the third gap 03 corresponding to the two first end annular surfaces 122 are symmetrically arranged at both ends of the rolling surface 121 of the wheel assembly 120. In other words, the portion of the third gap 03 corresponding to one first end annular surface 122 is designated as the first sub-gap; the portion corresponding to the other first end annular surface 122 is designated as the second sub-gap; along the axial direction aa of the wheel body 124, the rolling surface 121 is located between the first sub-gap and the second sub-gap; and the first sub-gap and the second sub-gap are symmetrically arranged. It is understood that in some other embodiments, the first sub-gap and the second sub-gap may also be asymmetrical.

[0075] In this embodiment, the size of the third gap 03 is the same at different positions. It is understood that in other embodiments, the size of the third gap 03 at different positions may not be exactly the same.

[0076] Optionally, the size of the second gap 02 is equal to the size of the third gap 03, which facilitates manufacturing design. It is understood that in some other embodiments, the size of the second gap 02 may also be different from the size of the third gap 03.

[0077] See Figure 4 , Figure 8 , Figures 13 to 16In this embodiment, the wheel assembly 120 includes an axle 123, a wheel body 124, a first bearing bush 125, and a second bearing bush 126. The wheel body 124 is located outside the axle 123. The wheel body 124 and the axle 123 are coaxial. The first bearing bush 125 covers one end of the axle 123 and is fixedly disposed in the first mounting cavity 111. The second bearing bush 126 covers the other end of the axle 123 and is fixedly disposed in the first mounting cavity 111. The first bearing bush 125 includes a first dustproof ring 1251, which is clearance-fitted with the first end ring surface 122 of the corresponding end of the wheel body 124. The second bearing bush 126 includes a second dustproof ring 1261, which is clearance-fitted with the first end ring surface 122 of the corresponding end of the wheel body 124. Both the first dustproof ring 1251 and the second dustproof ring 1261 extend beyond the opening 1111. Therefore, the first gap 01 located at both ends of the axial direction aa of the wheel body 124 is the gap between the first dustproof ring 1251 of the first bearing 125 and the side wall of the opening 1111, and the gap between the second dustproof ring 1261 of the second bearing 126 and the side wall of the opening 1111.

[0078] Furthermore, both the first bearing shell 125 and the second bearing shell 126 are fixedly disposed within the first mounting cavity 111. That is, when the wheel assembly 120 is operating, the first bearing shell 125 and the second bearing shell 126 are fixed relative to the sidewalls of the opening 1111. Therefore, when hair enters the first gap 01 on the corresponding side of the first bearing shell 125 and the second bearing shell 126, the hair can only enter the first mounting cavity 111 under the action of its own inertia or the pushing action of other hairs entering the first gap 01. In other words, the rotation of the wheel body 124 in the wheel assembly 120 will not drive hair into the first mounting cavity 111, reducing the risk of hair entering the second gap 02 and the third gap 03.

[0079] Furthermore, when the wheel assembly 120 is in operation, the sidewalls of the first bearing 125 and the second bearing 126 relative to the opening 1111 are fixed, which reduces friction on nearby hair, reduces the phenomenon of static electricity generated by nearby hair, and thus reduces the risk of hair adhering to the wheel assembly 120 or the structure around the wheel assembly 120 due to static electricity, and reduces the risk of hair entering the second gap 02 and the third gap 03.

[0080] Furthermore, the arrangement of the first bearing shell 125 and the second bearing shell 126 can fill part of the area between the wheel body 124 and the side wall of the opening 1111, reducing the risk of hair entering the first mounting cavity 111 and reducing the risk of the wheel assembly 120 getting stuck.

[0081] Furthermore, it is understandable that the wheel body 124 in the wheel assembly 120 is rotatable. During use, the wheel body 124 rotates to reduce the pushing force required for the floor brush 100 to move forward or backward.

[0082] See Figure 4 , Figure 6 , Figure 13 and Figure 14 In this embodiment, the wheel assembly 120 further includes a rubber-coated ring 127 sleeved on the wheel body 124. Along the radial direction of the wheel body 124, the first dustproof ring 1251 and the second dustproof ring 1261 are both located inside the rubber-coated ring 127 and are in clearance fit with it. Along the axial direction of the wheel body 124, the rubber-coated ring 127 extends to both sides, at least covering the gap between the first dustproof ring 1251 of the first bearing 125 and the wheel body 124, and at least covering the gap between the second dustproof ring 1261 of the second bearing 126 and the wheel body 124. Therefore, the gap between the first dustproof ring 1251 of the first bearing 125 and the wheel body 124 is blocked by the rubber-coated ring 127, reducing the risk of hair entering and the risk of the wheel assembly 120 jamming. The gap between the second dustproof ring 1261 of the second bearing bush 126 and the wheel body 124 is blocked by the rubber-coated ring 127 to reduce the risk of hair entering it and reduce the risk of the wheel assembly 120 getting stuck.

[0083] Understandably, the rubber-coated ring 127 is elastic, which can reduce the vibration when the wheel 124 rotates and improve the stability of the floor brush 100 when it moves.

[0084] Specifically, in this embodiment, along the axial direction aa of the wheel body 124, the rubber-coated ring 127 extends to the edges of the first dustproof ring 1251 of the first bearing 125 and the second dustproof ring 1261 of the second bearing 126, respectively. It is understood that in other embodiments, along the axial direction aa of the wheel body 124, the rubber-coated ring 127 may only cover a portion of the first dustproof ring 1251 of the first bearing 125 and / or the second dustproof ring 1261 of the second bearing 126, or extend beyond the edges of the first dustproof ring 1251 of the first bearing 125 and the second dustproof ring 1261 of the second bearing 126; this is not limited here.

[0085] In this embodiment, the first bearing 125 includes a third dustproof ring 1252 that connects to the first dustproof ring 1251; along the axial direction aa of the wheel body 124, the first dustproof ring 1251 is located between the third dustproof ring 1252 and the second dustproof ring 1261; the third dustproof ring 1252 has a first fitting annular surface 1253 that fits against the cavity wall of the first mounting cavity 111; along the axial direction aa of the wheel body 124, the height of the first fitting annular surface 1253 is greater than 0. The first fitting annular surface 1253 fits against the cavity wall of the first mounting cavity 111, reducing the risk of hair entering between the third dustproof ring 1252 and the first mounting cavity 111.

[0086] Furthermore, at least a portion of the first contact surface extends in a direction that has a component in the axial direction (aa) of the wheel body 124, thereby reducing the size of the third gap 03 along the radial direction (bb) of the wheel body 124 and decreasing hair accumulation within the third gap 03. In other words, when hair has accumulated to a certain extent, it can move within the third gap 03 around the axis of the wheel body 124, or move into the second gap 02. This continuous movement facilitates the hair's exit through the opening 1111.

[0087] In this embodiment, the second bearing bush 126 includes a fourth dustproof ring 1262 that connects to the second dustproof ring 1261; along the axial direction aa of the wheel body 124, the second dustproof ring 1261 is located between the first dustproof ring 1251 and the fourth dustproof ring 1262; the fourth dustproof ring 1262 has a second fitting ring surface 1263 that fits against the cavity wall of the first mounting cavity 111; along the axial direction aa of the wheel body 124, the height of the second fitting ring surface 1263 is greater than 0. The second fitting ring surface 1263 fits against the cavity wall of the first mounting cavity 111, reducing the risk of hair entering between the fourth dustproof ring 1262 and the first mounting cavity 111, thereby reducing the risk of hair entering between the wheel axle 123 and the wheel body 124, and reducing the risk of the wheel assembly 120 jamming.

[0088] Furthermore, at least a portion of the second mating surface extends in a direction that has a component in the axial direction (aa) of the wheel body 124, thereby reducing the size of the third gap 03 along the radial direction (bb) of the wheel body 124 and decreasing hair accumulation within the third gap 03. In other words, when hair has accumulated to a certain extent, it can move within the third gap 03 around the axis of the wheel body 124, or move into the second gap 02. This continuous movement facilitates the hair's exit through the opening 1111.

[0089] Specifically, in this embodiment, the third dustproof ring 1252 and the fourth dustproof ring 1262 are both conical rings, which are simple in structure and easy to manufacture. It is understood that in other embodiments, the third dustproof ring 1252 and the fourth dustproof ring 1262 are not limited to conical rings, and can also be any other regular or irregular shape.

[0090] In this embodiment, a second end ring surface 1241 is provided at one end of the wheel body 124 near the first bearing 125; the inner side of the third dustproof ring 1252 abuts against the second end ring surface 1241; along the axial direction aa of the wheel body 124, the height of the inner side of the third dustproof ring 1252 is greater than the height of the second end ring surface 1241, thereby reducing the contact area between the wheel body 124 and the third dustproof ring 1252 and reducing the friction area between the wheel body 124 and the third dustproof ring 1252 during the rotation of the wheel body 124.

[0091] In this embodiment, a third end ring surface 1242 is provided at one end of the wheel body 124 near the second bearing bush 126; the inner side of the fourth dustproof ring 1262 abuts against the third end ring surface 1242; along the axial direction aa of the wheel body 124, the height of the inner side of the fourth dustproof ring 1262 is greater than the height of the third end ring surface 1242, thereby reducing the contact area between the wheel body 124 and the fourth dustproof ring 1262 and reducing the friction between the wheel body 124 and the fourth dustproof ring 1262 during the rotation of the wheel body 124.

[0092] See Figure 4 , Figure 10 , Figures 12 to 16 In this embodiment, the first bearing bush 125 is provided with a first anti-rotation part 1254, and the cavity wall of the first mounting cavity 111 is provided with a second anti-rotation part 1112 that matches the first anti-rotation part 1254, so as to prevent the first bearing bush 125 from rotating with the wheel body 124.

[0093] Specifically, in this embodiment, the first anti-rotation part 1254 is an anti-rotation hole; the second anti-rotation part 1112 is an anti-rotation member that is at least partially inserted into the anti-rotation hole.

[0094] In this embodiment, there are two first anti-rotation portions 1254, which are symmetrically arranged along the axis of the wheel body 124 to reduce the risk of local stress concentration in the first bearing bush 125. It is understood that in other embodiments, the number of first anti-rotation portions 1254 is not limited to two, but may also be one or three. Optionally, when there are multiple first anti-rotation portions 1254, the multiple first anti-rotation portions 1254 are evenly distributed around the axis of the wheel body 124 to improve the uniformity of stress distribution on the first bearing bush 125.

[0095] In this embodiment, the movement of the first bearing bush 125 along the axial direction aa of the wheel body 124 is limited by the inner wall of the first mounting cavity 111 and the wheel body 124; the first anti-rotation part 1254 and the second anti-rotation part 1112 firstly move the first bearing bush 125 around the axis of the wheel body 124 so that the first bearing bush 125 is kept fixed in the first mounting cavity 111, and this fixing method facilitates the disassembly and assembly of the first bearing bush 125, and facilitates the installation and maintenance of the first bearing bush 125.

[0096] In this embodiment, the second bearing bush 126 is provided with a third anti-rotation part 1264, and the cavity wall of the first mounting cavity 111 is provided with a fourth anti-rotation part 1113 that matches the third anti-rotation part 1264, so as to prevent the second bearing bush 126 from rotating with the wheel body 124.

[0097] Specifically, in this embodiment, the third anti-rotation part 1264 is an anti-rotation hole; the fourth anti-rotation part 1113 is an anti-rotation member that is at least partially inserted into the anti-rotation hole.

[0098] In this embodiment, there are two third anti-rotation portions 1264, which are symmetrically arranged along the axis of the wheel body 124 to reduce the risk of local stress concentration in the second bearing bush 126. It is understood that in other embodiments, the number of third anti-rotation portions 1264 is not limited to two, but may also be one or three. Optionally, when there are multiple third anti-rotation portions 1264, the multiple third anti-rotation portions 1264 are evenly distributed around the axis of the wheel body 124 to improve the uniformity of force distribution on the second bearing bush 126.

[0099] In this embodiment, the movement of the second bearing bush 126 along the axial direction aa of the wheel body 124 is limited by the inner wall of the first mounting cavity 111 and the wheel body 124; the rotation of the second bearing bush 126 around the axis of the wheel body 124 is limited by the third anti-rotation part 1264 and the fourth anti-rotation part 1113, so that the second bearing bush 126 is kept fixed in the first mounting cavity 111, and this fixing method facilitates the disassembly and assembly of the second bearing bush 126, and facilitates the installation and maintenance of the second bearing bush 126.

[0100] In this embodiment, the first anti-rotation part 1254 is disposed on the third dustproof ring 1252 of the first bearing 125, and the second anti-rotation part 1112 is disposed on the fourth dustproof ring 1262 of the second bearing 126. It is understood that in some other embodiments, the positions of the first anti-rotation part 1254 and the second anti-rotation part 1112 are not limited to this, and they can also be disposed on other structures of the corresponding bearing located in the first mounting cavity 111.

[0101] See Figures 1 to 4 ,as well as Figure 10 In this embodiment, the housing 110 includes a lower housing 112 and a pressure cover 113; the pressure cover 113 is detachably connected to the lower housing 112; the lower housing 112 and the pressure cover 113 form a first mounting cavity 111; an opening 1111 is provided on the pressure cover 113. The pressure cover 113 is detachable, so that when the wheel assembly 120 is jammed and the wheel 124 does not rotate smoothly, the hair in the second gap 02 and / or the third gap 03 can be removed by disassembling the pressure cover 113, and the wheel assembly 120 can also be cleaned.

[0102] In this specific embodiment, the pressure cap 113 and the lower shell 112 are engaged. It is understood that in other embodiments, the pressure cap 113 and the lower shell 112 can also be fixedly connected by other means such as threaded connection. After the pressure cap 113 and the lower shell 112 are fixedly connected, they can be separated without damage by a specific method. This is not limited here.

[0103] In this embodiment, the wheel body 124 and the wheel axle 123 are integrally formed. There is no gap between the wheel body 124 and the wheel axle 123, which prevents hair from entering between the wheel body 124 and the wheel axle 123 and avoids the phenomenon of the wheel body 124 getting stuck.

[0104] It is understood that in some other embodiments, the wheel body 124 and the wheel axle 123 are not limited to being integrally formed, but can also be set separately and then fixedly connected or rotatably connected.

[0105] Optionally, the material of the rubber-coated ring 127 may be soft rubber or flocked material.

[0106] In this embodiment, along the axial direction aa of the wheel body 124, the two end faces of the wheel axle 123 are in contact with the first bearing 125 and the second bearing 126 respectively, which can limit the tilt of the wheel axle 123 relative to its own axis, and further limit the tilt of the wheel body 124 relative to its own axis.

[0107] In this embodiment, along the radial direction bb of the wheel body 124, the outer diameter of the first dustproof ring 1251 of the first bearing 125 is less than or equal to the outer diameter of the wheel body 124, so as to avoid the influence of the first dustproof ring 1251 on the rotation of the wheel body 124.

[0108] Optionally, the outer diameter of the rolling surface 121 is less than or equal to 30 mm.

[0109] In this embodiment, the first bearing 125 and the second bearing 126 are both separately formed from the housing 110, reducing the complexity of processing and lowering production costs. Furthermore, the first bearing 125, the second bearing 126, and the housing 110 can be made of different materials, which can further reduce costs or the weight of the floor brush 100 while still meeting load-bearing requirements. Of course, in other embodiments, the first bearing 125 and / or the second bearing 126 can also be integrally formed with the housing 110.

[0110] Optionally, the first bearing 125 and the second bearing 126 are made of stainless steel. Stainless steel is not easily deformed, reducing the risk of deformation of the first bearing 125 and the second bearing 126 due to the rotation of the wheel 124.

[0111] Optionally, the surface roughness of the first bearing bush 125 is less than or equal to 1.6 μm, so that the friction between the first bearing bush 125 and the wheel body 124, the wheel axle 123 and the inner wall of the first mounting cavity 111 is small. Specifically, polishing, grinding, magnetic grinding and other methods can be used to achieve a small surface roughness of the first bearing bush 125, or a lubrication layer can be provided on the surface of the first bearing bush 125 to achieve a small surface roughness.

[0112] In this embodiment, there are two wheel assemblies 120 and two first mounting cavities 111. The two first mounting cavities 111 and the two wheel assemblies 120 are arranged in a one-to-one correspondence. It is understood that in other embodiments, the number of wheel assemblies 120 is not limited to two; it can be one or more, depending on the design requirements, and is not limited here.

[0113] It is understandable that the housing 110 may also be provided with mounting cavities for installing other structures, which can be set as needed, and will not be elaborated here.

[0114] In this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0115] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" may explicitly include at least one of those features. In this application, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.

[0116] In this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0117] In this application, unless otherwise expressly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0118] It should be understood that the above embodiments are exemplary and are not intended to include all possible embodiments covered by the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several embodiments of this application and do not limit the scope of protection of this patent application.

Claims

1. A floor brush for a cleaning device, characterized in that The floor brush includes: The housing, wherein the housing is provided with a first mounting cavity; the bottom side of the first mounting cavity is provided with an opening; and A wheel assembly is installed in the first mounting cavity; the wheel assembly has a rolling surface and two first end ring surfaces arranged opposite to each other along the axial direction of the wheel assembly; the two first end ring surfaces are respectively connected to the two ends of the rolling surface; the rolling surface and the first end ring surfaces of the wheel assembly both partially extend out of the opening of the first mounting cavity; Wherein, the gap between the sidewall of the opening and the wheel assembly is the first gap; the gap between the rolling surface located in the first mounting cavity and the cavity wall of the first mounting cavity is the second gap; the gap between the first end annular surface located in the first mounting cavity and the cavity wall of the first mounting cavity is the third gap; the size of the second gap is greater than the size of the first gap; the size of the third gap is greater than the size of the first gap.

2. The floor brush of claim 1 wherein, The size of the first gap is less than or equal to 1 mm; And / or, the size of the second gap falls within the range of 0.2mm to 2mm; And / or, the size of the third gap falls within the range of 0.2mm to 2mm; And / or, the size of the second gap is equal to the size of the third gap.

3. The floor brush of claim 1 or 2, wherein The wheel assembly includes: axle; A wheel body is located outside the axle; the wheel body and the axle are coaxial. The first bearing shell covers one end of the axle and is fixedly disposed in the first mounting cavity; and The second bearing shell covers the other end of the wheel axle and is fixedly disposed in the first mounting cavity; The first bearing bush includes a first dustproof ring, which is in clearance fit with the end face of the corresponding end of the wheel body; the second bearing bush includes a second dustproof ring, which is in clearance fit with the end face of the corresponding end of the wheel body; the first dustproof ring extends out of the opening, and the second dustproof ring extends out of the opening.

4. The floor brush of claim 3 wherein, The wheel assembly further includes a rubber-coated ring sleeved on the wheel body; along the radial direction of the wheel body, a first dustproof ring and a second dustproof ring are both located inside the rubber-coated ring and are in clearance fit with the rubber-coated ring; along the axial direction of the wheel body, the rubber-coated ring extends to both sides, and the rubber-coated ring at least covers the gap between the first dustproof ring of the first bearing and the wheel body, and the rubber-coated ring at least covers the gap between the second dustproof ring of the second bearing and the wheel body.

5. The floor brush of claim 4 wherein, The first bearing bush includes a third dustproof ring that connects to the first dustproof ring; along the axial direction of the wheel body, the first dustproof ring is located between the third dustproof ring and the second dustproof ring; the third dustproof ring has a first fitting ring surface that fits against the cavity wall of the first mounting cavity; along the axial direction of the wheel body, the height of the first fitting ring surface is greater than 0; The second bearing bush includes a fourth dustproof ring that engages with the second dustproof ring; along the axial direction of the wheel body, the second dustproof ring is located between the first dustproof ring and the fourth dustproof ring; the fourth dustproof ring has a second mating ring surface that fits against the cavity wall of the first mounting cavity; along the axial direction of the wheel body, the height of the second mating ring surface is greater than 0.

6. The floor brush of claim 5 wherein, The third dustproof ring is conical; and / or, the fourth dustproof ring is conical.

7. The floor brush of claim 5 wherein, The wheel body has a second end ring surface at one end near the first bearing; the inner side of the third dustproof ring abuts against the second end ring surface; along the axial direction of the wheel body, the height of the inner side of the third dustproof ring is greater than the height of the second end ring surface; And / or, the end of the wheel body near the second bearing is provided with a third end ring surface; the inner side of the fourth dustproof ring abuts against the third end ring surface; along the axial direction of the wheel body, the height of the inner side of the fourth dustproof ring is greater than the height of the third end ring surface.

8. The floor brush of claim 3 wherein, The first bearing bush is provided with a first anti-rotation part, and the cavity wall of the first mounting cavity is provided with a second anti-rotation part that matches the first anti-rotation part; The second bearing bush is provided with a third anti-rotation part, and the cavity wall of the first mounting cavity is provided with a fourth anti-rotation part that matches the third anti-rotation part.

9. The floor brush of any one of claims 1, 2, 4-8, wherein, The housing includes a lower shell and a pressure cover; the pressure cover is detachably connected to the lower shell; the lower shell and the pressure cover form the first mounting cavity; the opening is located on the pressure cover.

10. The floor brush of claim 1 or 2, wherein, The wheel assembly includes: Wheel and axle; and A wheel body is fitted onto the axle; the wheel body and the axle are integrally formed.

Images