Rotating Brush Mechanism, Vacuuming System and Floor Sweeping Robot

Abstract

The present application relates to a rolling brush mechanism, a vacuum cleaning system and a floor cleaning robot. The rolling brush mechanism includes a floating housing having a rolling brush cavity, and a rolling brush assembly disposed in the rolling brush cavity. Wherein, the outer peripheral surface of the rolling brush assembly forms a rolling surface, and the rolling brush cavity has at least a pair of opposing surfaces in the circumferential direction of the rolling brush assembly. Each pair of opposing surfaces is disposed opposite to the rolling surface along the radial direction of the rolling brush assembly and is concentric with the rolling brush assembly. A gap is formed between the rolling surface and each pair of opposing surfaces, and the dimension K of the gap along the radial direction of the rolling brush assembly satisfies the condition: 0.5 mm ≤ K ≤ 2 mm. For the rolling brush mechanism, the vacuum cleaning system and the floor cleaning robot provided by the present application, since 0.5 mm ≤ K ≤ 2 mm is satisfied, the space volume between the rolling brush assembly and the rolling brush cavity is minimized as much as possible. Therefore, when dust enters the rolling brush assembly, the negative pressure increases, making it easier for the dust to be adsorbed from the rolling brush cavity to the dust outlet and discharged to the dust collection box for collection, thereby improving the vacuum cleaning effect.

Description

Technical Field

[0001] The present application relates to the technical field of cleaning equipment, and particularly to a roller brush mechanism, a dust suction system, and a floor sweeping robot. Background Art

[0002] A floor sweeping robot is a type of intelligent household appliance that can automatically clean the floor in a room with a certain degree of artificial intelligence.

[0003] The floor sweeping robot collects dust on the ground through a dust suction system. Generally, the dust suction system includes a roller brush mechanism. The roller brush mechanism includes a floating housing and a roller brush assembly. The roller brush assembly is disposed in the roller brush cavity of the floating housing. When the roller brush assembly rotates, it can drive up dust. The dust is sucked through the roller brush cavity to the rear dust collection box under the action of the suction force. However, there is a problem that the dust suction effect is not good due to insufficient negative pressure in the dust suction path. Summary of the Invention

[0004] Based on this, in view of the problem that there is insufficient negative pressure in the dust suction path of the traditional dust suction system, resulting in poor dust suction effect, it is necessary to provide a roller brush mechanism, a dust suction system, and a floor sweeping robot that can improve the negative pressure and dust suction effect in the dust suction path.

[0005] The present application provides a roller brush mechanism, including:

[0006] A floating housing having a roller brush cavity; and

[0007] A roller brush assembly disposed in the roller brush cavity;

[0008] Wherein, the outer peripheral surface of the roller brush assembly forms a rolling surface. The roller brush cavity has at least a pair of opposing surfaces in the circumferential direction of the roller brush assembly. Each of the opposing surfaces is disposed radially opposite to the rolling surface along the roller brush assembly and is concentric with the roller brush assembly;

[0009] A gap is formed between the rolling surface and each of the opposing surfaces. The dimension K of the gap along the radial direction of the roller brush assembly satisfies the condition: 0.5 mm ≤ K ≤ 2 mm.

[0010] In one embodiment, the K satisfies the condition: 0.5 mm ≤ K ≤ 1 mm.

[0011] In one embodiment, the floating housing has a dust inlet and a dust outlet communicating with the roller brush cavity;

[0012] The opposing surfaces include two, and the two opposing surfaces are configured to be spaced apart in the circumferential direction of the roller brush assembly. The dust inlet is located between one side of the two opposing surfaces along the circumferential direction of the roller brush assembly, and the dust outlet is located between the other side of the two opposing surfaces along the circumferential direction of the roller brush assembly.

[0013] In one embodiment, the two opposed surfaces are opposite to each other in the radial direction of the roller brush assembly.

[0014] In one embodiment, the dust inlet has a first center line, and the dust outlet has a second center line;

[0015] The first center line and the second center line are coplanar and intersect with each other.

[0016] In one embodiment, the included angle between the first center line and the second center line is greater than 90 degrees and less than 180 degrees.

[0017] In one embodiment, a part of the roller brush assembly is exposed through the dust inlet.

[0018] In one embodiment, the roller brush assembly is rotatably connected to the floating housing. The two opposed surfaces are a first opposed surface and a second opposed surface respectively;

[0019] The first opposed surface is located on one side of the dust inlet facing the rotation direction of the roller brush assembly, and the second opposed surface is located on one side of the dust inlet facing away from the rotation direction of the roller brush assembly;

[0020] A first gap is formed between the first opposed surface and the rolling surface. The dimension of the first gap in the radial direction of the roller brush assembly is K1. A second gap is formed between the second opposed surface and the rolling surface. The dimension of the second gap in the radial direction of the roller brush assembly is K2. K1 and K2 satisfy the condition: K1 > K2.

[0021] In one embodiment, the dimension of the first opposed surface in the circumferential direction of the roller brush assembly is smaller than the dimension of the second opposed surface in the circumferential direction of the roller brush assembly.

[0022] In one embodiment, the roller brush cavity further has a guiding surface. One side of the guiding surface is connected to the second opposed surface, and the other side of the guiding surface extends linearly along the circumferential direction of the roller brush assembly and towards the direction of the dust inlet.

[0023] In one embodiment, in the direction from the second opposed surface towards the dust inlet, the distance between the guiding surface and the roller brush assembly in the radial direction of the roller brush assembly gradually increases.

[0024] In one embodiment, the roller brush assembly includes a roller body and a brush body provided on the roller body. The brush body includes a rubber brush and a hair brush;

[0025] The distance between the side of the brush away from the roller body and the axis of the roller body is greater than the distance between the side of the rubber brush away from the roller body and the axis of the roller body;

[0026] Wherein, the outer peripheral surface of the brush forms the rolling surface.

[0027] In one embodiment, the floating housing includes a housing body, a roller brush cover and a scraping strip. The roller brush cover is engaged with the housing body, and the scraping strip is installed on the roller brush cover;

[0028] The housing body, the roller brush cover and the scraping strip jointly enclose to form the roller brush cavity.

[0029] In one embodiment, at least part of the opposing surface is located on the roller brush cover and / or the scraping strip.

[0030] On the other hand, the present application also provides a dust suction system, including the above-mentioned roller brush mechanism.

[0031] On another aspect of the present application, there is also provided a floor sweeping robot, including the above-mentioned dust suction system.

[0032] In the above-mentioned roller brush mechanism, dust suction system and floor sweeping robot, during the process of the dust path where dust enters the roller brush cavity from the dust inlet and then exits from the dust outlet, if the volume of the roller brush cavity is too large, it will inevitably lead to a large negative pressure loss, making it difficult for dust to be adsorbed and discharged. However, since the clearance dimension between the rolling surface and each opposing surface along the radial direction of the roller brush assembly satisfies 0.5 mm ≤ K ≤ 2 mm, therefore, while not affecting the rotation of the roller brush assembly and avoiding abnormal noise generated by the contact between the roller brush assembly and the roller brush cavity, the space volume between the roller brush assembly and the roller brush cavity is also minimized as much as possible. So when the dust enters between the rolling surface of the roller brush assembly and the opposing surface in the roller brush cavity, the negative pressure increases, making it easier for the dust to be adsorbed from the roller brush cavity to the dust outlet and discharged to the dust collection box for collection, thereby improving the dust suction effect of the dust suction system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a three-dimensional structural schematic diagram of a roller brush mechanism in an embodiment of the present application;

[0034] Figure 2 is Figure 1 the cross-sectional structural schematic diagram of the roller brush mechanism shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0037] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of this application.

[0038] In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0042] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements are only drawn by way of example in the drawings and not necessarily to the true scale.

[0043] Figure 1 The perspective structural schematic diagram of the roller brush mechanism in an embodiment of the present application is shown. Figure 2 is Figure 1 The cross-sectional schematic diagram of the roller brush mechanism shown. For ease of description, the drawings only show the structures related to the embodiments of the present application.

[0044] Referring to the drawings, an embodiment of the present application provides a roller brush mechanism 100, which includes a floating housing 10 and a roller brush assembly 20. The roller brush mechanism 100 in the embodiment of the present application is applied to a floor sweeping robot and is used as a part of the dust suction system of the floor sweeping robot. In other embodiments, it can also be applied to other devices suitable for the roller brush mechanism 100, which is not limited herein.

[0045] The floor sweeping robot includes a housing and a floating connecting piece. The housing includes a fixed housing, and the fixed housing has a floating cavity. One end of the floating connecting piece is connected to the fixed housing, and the other end is connected to the roller brush mechanism 100. A rotating arm is also provided on the outer side of the roller brush mechanism 100. When the roller brush assembly 20 encounters an obstacle, the roller brush mechanism is driven by the rotating arm to compress the floating connecting piece and float in the floating cavity to avoid obstacles.

[0046] The floating housing 10 has a rotary brush chamber 11, and the rotary brush assembly 20 is arranged in the rotary brush chamber 11. Among them, the outer peripheral surface of the rotary brush assembly 20 forms a rolling surface 21. The rotary brush chamber 11 has at least a pair of opposing surfaces in the circumferential direction of the rotary brush assembly 20. Each pair of opposing surfaces is arranged opposite to the rolling surface 21 along the radial direction of the rotary brush assembly 20 and is concentric with the rotary brush assembly 20. It can be understood that the opposing surfaces are arc surfaces. Specifically, the floating housing 10 also has a dust inlet 112 and a dust outlet 113 that communicate with the rotary brush chamber 11. It should be noted that a part of the rotary brush assembly 20 is exposed through the dust inlet 112 and can thus contact the ground. The rotary brush assembly 20 is rotatably connected to the floating housing 10. When the rotary brush assembly 20 rotates, dust is lifted through the dust inlet 112, enters the rotary brush chamber 11 under the action of negative pressure, and is discharged from the dust outlet 113 to the inside of the floating connector and finally collected in the dust collection box.

[0047] A gap is formed between the rolling surface 21 and each pair of opposing surfaces, and the dimension K of the gap along the radial direction of the rotary brush assembly 20 satisfies the condition: 0.5 mm ≤ K ≤ 2 mm.

[0048] During the process of the dust path where the dust enters the rotary brush chamber 11 from the dust inlet 112 and then is discharged from the dust outlet 113, if the volume of the rotary brush chamber 11 is too large, it will inevitably lead to a large negative pressure loss, making it difficult for the dust to be adsorbed and discharged. However, since the dimension of the gap between the rolling surface 21 and each pair of opposing surfaces along the radial direction of the rotary brush assembly 20 satisfies 0.5 mm ≤ K ≤ 2 mm, therefore, while not affecting the rotation of the rotary brush assembly 20 and avoiding abnormal noise caused by contact between the rotary brush assembly 20 and the rotary brush chamber 11, the space volume between the rotary brush assembly 20 and the rotary brush chamber 11 is also minimized as much as possible. Thus, when the dust enters between the rolling surface 21 of the rotary brush assembly 20 and the opposing surfaces in the rotary brush chamber 11, the negative pressure increases, making it easier for the dust to be adsorbed from the rotary brush chamber 11 to the dust outlet 113 and discharged to the dust collection box for collection, thereby improving the dust suction effect of the dust suction system.

[0049] In order to verify the dust suction effects of the prior art and the rotary brush mechanism 100 of the present application, the inventor conducted targeted verification tests:

[0050] Test method: The test was carried out by using the linear dust removal method. The specific method of the linear dust removal method is to scatter a certain amount of dust in a specific area. The specific area can be rectangular. After the test piece walks through the specific area in a straight line, the amount of dust suction is determined to determine the dust removal rate. It should be noted that when the rotary brush mechanism 100 of the present application is tested, negative pressure needs to be provided for the rotary brush mechanism 100 to suck dust, and the dust needs to be collected and weighed after collection. Therefore, a dust collection structure and a negative pressure structure should be connected behind the rotary brush mechanism 100.

[0051] The test results are shown in Table 1:

[0052] Table 1

[0053]

[0054] It should be noted that two groups of data were tested in each of the above embodiments and comparative examples for reference.

[0055] It should also be noted that the dust suction effect when 0.5 mm < K was not tested in the above experiments. The reason is that when 0.5 mm < K, the length of the roller brush assembly 20 exposed outside the dust inlet 112 is relatively large, which causes the roller brush assembly 20 to pat the ground, and the roller brush assembly 20 is also prone to touch the roller brush cavity 11, resulting in noise during the operation of the roller brush mechanism 100 and affecting the customer experience.

[0056] Therefore, from the analysis of the above test results, when 0.5 mm ≤ K ≤ 2 mm, the dust removal rate can reach up to 87.57% or more. When K > 2 mm, the dust removal rate drops significantly, and when 0.5 mm < K, noise occurs. Therefore, from the above tests, when 0.5 mm ≤ K ≤ 2 is satisfied, the dust removal rate is significantly improved, the dust suction effect is improved, noise is avoided, and the user experience is improved.

[0057] In some embodiments, K satisfies the condition: 0.5 mm ≤ K ≤ 1 mm. In this range, the negative pressure effect in the roller brush cavity 11 is the best and the dust suction effect is better.

[0058] In some embodiments, the floating housing 10 includes a housing body 12, a roller brush cover 13 and a scraping strip 14. The roller brush cover 13 is engaged with the housing body 12. The scraping strip 14 is installed on the side of the roller brush cover 13 facing away from the housing body 12. The housing body 12, the roller brush cover 13 and the scraping strip 14 together enclose to form the roller brush cavity 11. Specifically, the housing body 12 has an opening, the roller brush cover 13 is covered at the opening and engaged with the housing body 12. The scraping strip 14 extends along the axial direction of the roller brush assembly 20 and is located on the side of the dust inlet 112 facing the rotation direction of the roller brush assembly 20. When the floor cleaning robot works, the garbage on the ground is gathered to the dust inlet 112 through the scraping strip 14, which is convenient for the roller brush assembly 20 to clean the garbage.

[0059] Furthermore, the opposing surface is at least partially located on the roller brush cover 13, or at least partially located on the scraping strip 14, or at least partially located on the roller brush cover 13 and the scraping strip 14, which is not limited herein. In this way, the occupied area of the opposing surface in the roller brush cavity 11 can be further increased, thereby improving the dust suction effect.

[0060] In some embodiments, the rotary brush assembly 20 includes a roller body 22 and a brush body 23 disposed on the roller body 22. The brush body 23 includes a rubber brush 231 and a hair brush 232. The distance between the side of the hair brush 232 away from the roller body 22 and the axis of the roller body 22 is greater than the distance between the side of the rubber brush 231 away from the roller body 22 and the axis of the roller body 22. The outer peripheral surface of the hair brush 232 forms a rolling surface 21. The rubber brush 231 contacts the particulate matter on the ground, and then can pick up the particulate matter for cleaning. The hair brush 232 cleans the garbage with smaller particles such as dust, contacts the ground to drive up the dust and other garbage on the ground, which is convenient for adsorption and cleaning. In this way, the cooperation of the two can improve the cleaning effect.

[0061] In some embodiments, there are two opposed surfaces, and the two opposed surfaces are configured to be spaced apart in the circumferential direction of the rotary brush assembly 20. The dust inlet 112 is located between one side of the two opposed surfaces along the circumferential direction of the rotary brush assembly 20, and the dust outlet 113 is located between the other side of the two opposed surfaces along the circumferential direction of the rotary brush assembly 20. The opposed surfaces are provided at the positions between the dust inlet 112 and the dust outlet 113, which can further increase the negative pressure in the rotary brush chamber 11, and thus improve the dust suction effect.

[0062] Further, the two opposed surfaces are opposite to each other in the radial direction of the rotary brush assembly 20. In this way, the negative pressure can be evenly distributed in the rotary brush chamber 11, and the dust suction effect can be stabilized.

[0063] In some embodiments, the dust inlet 112 has a first center line, and the dust outlet 113 has a second center line. The first center line and the second center line are coplanar and intersect each other. In this way, the dust suction path for the dust to enter the rotary brush chamber 11 from the dust inlet 112 and then discharge from the dust outlet 113 can be the shortest, improving the dust suction effect.

[0064] Further, the angle between the first center line and the second center line is greater than 90 degrees and less than 180 degrees. In this way, the distance between the dust inlet 112 and the dust outlet 113 can be shortened as much as possible, and the dust suction path can be shortened.

[0065] In some embodiments, the roller brush assembly 20 is rotatably connected to the floating housing 10. The two opposing surfaces are respectively the first opposing surface 114 and the second opposing surface 115. The first opposing surface 114 is located on the side of the dust inlet 112 facing the rotation direction of the roller brush assembly 20, and the second opposing surface 115 is located on the side of the dust inlet 112 facing the rotation direction of the roller brush assembly 20. A first gap is formed between the first opposing surface 114 and the rolling surface 21. The dimension of the first gap in the radial direction of the roller brush assembly 20 is K1. A second gap is formed between the second opposing surface 115 and the rolling surface 21. The dimension of the second gap in the radial direction of the roller brush assembly 20 is K2. K1 and K2 satisfy the condition: K1 > K2. In this way, after the dust enters the roller brush chamber 11 from the dust inlet 112, due to the relatively sufficient space between the first opposing surface 114 and the rolling surface 21 and sufficient negative pressure, the dust can be more easily adsorbed from the space between the first opposing surface 114 and the rolling surface 21 to the dust outlet 113 and discharged. And because the space between the second opposing surface 115 and the rolling surface 21 is small, it can prevent the dust from easily entering the space between the second opposing surface 115 and the rolling surface 21 and returning to the dust inlet 112 along with the rotation of the roller brush assembly. Therefore, the dust collection effect and dust collection efficiency are further improved. Specifically, the first opposing surface 114 is located on the roller brush cover 13 and the scraping strip 14, and the second opposing surface 115 is located on the housing body 12 and the roller brush cover 13.

[0066] Furthermore, the dimension of the first opposing surface 114 in the circumferential direction of the roller brush assembly 20 is smaller than the dimension of the second opposing surface 115 in the circumferential direction of the roller brush assembly 20. In this way, the path length of the dust from the dust inlet 112 through the space between the first opposing surface 114 and the rolling surface 21 and then into the dust outlet 113 can be reduced, enabling the dust to be quickly discharged from the dust outlet 113 and improving the dust removal efficiency.

[0067] In some embodiments, there is also a guiding surface 116 in the roller brush chamber 11. One side of the guiding surface 116 is connected to the second opposing surface 115, and the other side of the guiding surface 116 extends linearly along the circumferential direction of the roller brush assembly 20 and towards the direction of the dust inlet 112. In this way, the rotation of the roller brush assembly 20 in the roller brush chamber 11 can be made smoother. Specifically, the side of the guiding surface 116 facing away from the second opposing surface 115 is connected to the dust inlet 112. Specifically, the guiding surface 116 is located on the roller brush cover 13.

[0068] Furthermore, in the direction from the second opposing surface 115 towards the dust inlet 112, the distance between the guiding surface 116 and the roller brush assembly 20 in the radial direction of the roller brush assembly 20 gradually increases. In this way, it is more beneficial for the rotation of the roller brush assembly 20 in the roller brush chamber 11.

[0069] Based on the same inventive concept, the present application also provides a dust collection system, including the above-mentioned roller brush mechanism 100.

[0070] Specifically, the dust collection system includes a floating connector, a dust collection box, an air duct structure, and a fan structure, which are sequentially connected along the airflow direction. The roller brush mechanism is connected to the end of the floating connector facing away from the dust collection box. Thus, when negative pressure is generated by the fan structure, dust is collected from the roller brush mechanism, the floating connector, and the dust collection box.

[0071] Based on the same inventive concept, the present application also provides a sweeping robot, including the above-mentioned dust collection system.

[0072] Specifically, the sweeping robot further includes a housing, and the dust collection system is arranged on the housing.

[0073] The roller brush mechanism 100, the dust collection system, and the sweeping robot provided in the embodiments of the present application have the following beneficial effects:

[0074] In the process of dust entering the roller brush chamber 11 from the dust inlet 112 and then being discharged from the dust outlet 113, if the volume of the roller brush chamber 11 is too large, it will inevitably lead to a large negative pressure loss, making it difficult for the dust to be adsorbed and discharged. However, since the radial gap size between the rolling surface 21 and each opposing surface along the roller brush assembly 20 satisfies 0.5 mm ≤ K ≤ 2 mm, the volume of the space between the roller brush assembly 20 and the roller brush chamber 11 is reduced as much as possible without affecting the rotation of the roller brush assembly 20 and avoiding the collision between the roller brush assembly 20 and the roller brush chamber 11 to generate abnormal noise. Therefore, when dust enters between the rolling surface 21 of the roller brush assembly 20 and the opposing surface in the roller brush chamber 11, the negative pressure increases, making it easier for the dust to be adsorbed from the roller brush chamber 11 to be discharged to the dust outlet 113 and collected in the dust collection box, thereby improving the dust collection effect of the dust collection system.

[0075] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A rolling brush mechanism (100), characterized in that, Comprising: A floating housing (10), having a rotary brush chamber (11), and having a dust inlet (112) and a dust outlet (113) communicating with the rotary brush chamber (11); and A rotary brush assembly (20), disposed within the rotary brush chamber (11) and rotatably connected to the floating housing (10); Wherein, an outer peripheral surface of the rotary brush assembly (20) forms a rolling surface (21), the rotary brush chamber (11) has a first opposing surface (114) and a second opposing surface (115) in the circumferential direction of the rotary brush assembly (20), both the first opposing surface (114) and the second opposing surface (115) are disposed radially opposite to the rolling surface (21) along the rotary brush assembly (20), and are concentric with the rotary brush assembly (20); the first opposing surface (114) is located between one side of the dust inlet (112) facing the rotational direction of the rotary brush assembly (20) and one side of the dust outlet (113), and the second opposing surface (115) is located between one side of the dust inlet (112) facing away from the rotational direction of the rotary brush assembly (20) and the other side of the dust outlet (113); A first gap is formed between the first opposing surface (114) and the rolling surface (21), a dimension of the first gap in the radial direction along the rotary brush assembly (20) is K1, a second gap is formed between the second opposing surface (115) and the rolling surface, a dimension of the second gap in the radial direction along the rotary brush assembly (20) is K2, and the K1 and the K2 satisfy the condition: K1 > K2, and 0.5 mm ≤ K1 ≤ 2 mm, 0.5 mm ≤ K2 ≤ 2 mm.

2. The roller brush mechanism (100) according to claim 1, characterized in that, The K1 and K2 satisfy the condition: 0.5 mm ≤ K1 ≤ 1 mm, and 0.5 mm ≤ K2 ≤ 1 mm.

3. The roller brush mechanism (100) according to claim 1, characterized in that, The first opposing surface (114) and the second opposing surface (115) are opposed to each other in the radial direction of the rotary brush assembly (20).

4. The roller brush mechanism (100) according to claim 1, characterized in that, The dust inlet (112) has a first center line, and the dust outlet (113) has a second center line; The first center line and the second center line are coplanar and intersect with each other.

5. The roller brush mechanism (100) according to claim 4, characterized in that, An included angle between the first center line and the second center line is greater than 90 degrees and less than 180 degrees.

6. The roller brush mechanism according to claim 1, characterized in that, A part of the rotary brush assembly (20) is exposed through the dust inlet (112).

7. The roller brush mechanism (100) according to claim 1, characterized in that, A dimension of the first opposing surface (114) in the circumferential direction of the rotary brush assembly (20) is smaller than a dimension of the second opposing surface (115) in the circumferential direction of the rotary brush assembly (20).

8. The roller brush mechanism (100) according to claim 1, characterized in that, The rotary brush chamber (11) further has a guiding surface (116), one side of the guiding surface (116) is connected to the second opposing surface (115), and the other side of the guiding surface (116) extends linearly along the circumferential direction of the rotary brush assembly (20) and towards the direction of the dust inlet (112).

9. The rotary brush mechanism (100) according to claim 8, characterized in that, In a direction from the second opposing surface (115) towards the dust inlet (112), a spacing between the guiding surface (116) and the rotary brush assembly (20) in the radial direction along the rotary brush assembly (20) gradually increases.

10. The roller brush mechanism (100) according to claim 1, characterized in that, The rolling brush assembly (20) includes a roller body (22) and a brush body (23) provided on the roller body (22). The brush body (23) includes a rubber brush (231) and a hair brush (232). The distance between the side of the hair brush (232) away from the roller body (22) and the axis of the roller body (22) is greater than the distance between the side of the rubber brush (231) away from the roller body (22) and the axis of the roller body (22). Wherein, the outer peripheral surface of the hair brush (232) forms the rolling surface (21).

11. The roller brush mechanism (100) according to claim 1, characterized in that, The floating housing (10) includes a housing body (12), a rolling brush cover (13) and a scraping strip (14). The rolling brush cover (13) is fitted with the housing body (12), and the scraping strip (14) is installed on the side of the rolling brush cover (13) facing away from the housing body (12). The housing body (12), the rolling brush cover (13) and the scraping strip (14) jointly enclose to form the rolling brush cavity (11).

12. The roller brush mechanism (100) according to claim 11, characterized in that, The first opposing surface (114) and the second opposing surface (115) are at least partially located on the rolling brush cover (13) and / or the scraping strip (14).

13. A dust collection system, characterized in that, It includes the rolling brush mechanism (100) according to any one of claims 1 to 12.

14. A floor cleaning robot, characterized in that, It includes the vacuum cleaning system according to claim 13.

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