Roller assembly and self-moving cleaning equipment

Abstract

The invention relates to a roller assembly and self-moving cleaning equipment. The roller assembly comprises a roller support, a roller mop and a dirt scraping structure. The roller mop cloth is rotationally arranged, and the axial direction of the roller mop cloth is parallel to the plane where the base is located. The roller support is arranged outside the roller mop in a covering mode, the roller support partially covers the roller mop, at least part of the roller mop is located in a containing cavity of the roller support, and the roller support is provided with water spraying holes for providing liquid for the roller mop. The dirt scraping structure is connected with the roller support and partially located in the containing cavity, a scraping strip is arranged on the surface, facing the roller mop, of the dirt scraping structure, and the scraping strip faces the roller mop and abuts against the roller mop in an interference mode in the advancing direction of the self-moving cleaning equipment. Wherein the magnitude of interference is larger than or equal to 1.8 mm and smaller than or equal to 2.5 mm, and the magnitude of interference is in negative correlation with the water content of the roller mop. According to the structure, the water content of the roller is controlled by controlling the interference magnitude of the scraping strip and the roller, so that the dry-wet degree of the to-be-cleaned surface can meet the scene cleaning requirement.

Description

[0001] This application claims priority to Chinese Patent Application No. 202512057496.7, filed with the Chinese Patent Office on December 31, 2025, entitled "Roller Drive Device, Roller Assembly and Cleaning Equipment", the whole or part of which is incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of cleaning equipment technology, and more particularly to a roller assembly and a self-moving cleaning device. Background Technology

[0003] Self-propelled cleaning devices (such as robotic vacuum cleaners and floor scrubbers) are intelligent cleaning appliances that can be used to automatically or assistedly clean surfaces. Self-propelled cleaning devices can reduce the physical exertion of manual cleaning through mechanization and automation technologies, while also improving cleaning efficiency and convenience.

[0004] Self-propelled cleaning devices achieve efficient cleaning of surfaces through the rotation of a roller. During the cleaning process, a cleaning solution (such as water or detergent) can be sprayed onto the roller. The rotating, wet roller then wipes the surface to be cleaned. A squeegee removes excess liquid from the roller surface to control the degree of wetness of the surface. The moisture content of the roller is crucial to the cleaning effect. If the roller is too wet, the surface may become excessively damp, affecting user activities and increasing drying time. If the moisture content is too low, insufficient cleaning solution may fail to effectively remove stains, resulting in a poor cleaning outcome.

[0005] In existing technologies, it is difficult to control the moisture content of the roller. Therefore, there is an urgent need for a roller assembly that can precisely control the moisture content of the roller. Summary of the Invention

[0006] In view of this, the present disclosure provides a roller assembly and a self-moving cleaning device, which controls the moisture content of the roller by controlling the interference fit between the scraper and the roller, so that the dryness and wetness of the surface to be cleaned can meet the needs of the cleaning scenario.

[0007] In a first aspect, according to some embodiments of the present disclosure, a roller assembly is provided, comprising:

[0008] A roller mop, wherein the roller mop is rotatably configured and the axial direction of the roller mop is parallel to the plane of the base of the self-moving cleaning device;

[0009] A roller bracket, which covers the roller mop, with a portion of the roller bracket covering the top of the roller mop, the roller mop being at least partially located in a receiving cavity of the roller bracket, and the roller bracket having spray holes for supplying liquid to the roller mop;

[0010] The cleaning structure is connected to the roller bracket. The cleaning structure is partially located in the receiving cavity. The cleaning structure has a scraper on its surface facing the roller mop. Along the traveling direction of the self-moving cleaning device, the scraper is positioned towards the roller mop and the scraper is in interference contact with the roller mop.

[0011] The interference fit between the scraper and the roller mop is greater than or equal to 1.8 mm and less than or equal to 2.5 mm, and the interference fit is negatively correlated with the moisture content of the roller mop.

[0012] In this embodiment, by setting the interference fit between the scraper and the roller within the range of 1.8mm-2.5mm, different cleaning needs can be met. Since the interference fit between the scraper and the roller is negatively correlated with the moisture content of the roller, a specific interference fit can be set according to the cleaning requirements to adapt to different cleaning needs and thus meet the user's specific needs.

[0013] For example, when cleaning a wooden floor, the roller's moisture content can be kept low by setting an interference fit. This reduces the likelihood of excessive liquid residue on the wooden floor due to high roller moisture content, which could lead to warping or mold growth. Therefore, when cleaning wooden floors, a relatively large interference fit can be set between the squeegee and the roller. Conversely, when cleaning tile or stone floors, higher moisture content helps improve the penetration of the cleaning agent, making it easier to remove stubborn stains. Therefore, when cleaning tile or stone floors, a relatively small interference fit can be set between the squeegee and the roller.

[0014] Furthermore, it's easy to understand that a higher moisture content in the roller allows for deep cleaning of the surface. The high moisture content of the roller soaks up stubborn stains, softening them and achieving a powerful clean. Therefore, in this scenario, a relatively small interference fit between the squeegee and the roller can be set. Conversely, when performing light, routine cleaning, a relatively large interference fit between the squeegee and the roller can be set. This allows the roller's moisture content to be tailored to the user's needs for different cleaning intensities.

[0015] Furthermore, the parameter settings based on the quantitative model in the embodiments of this application can improve the stability of the performance of the self-moving cleaning equipment. For example, the moisture content of the roller may fluctuate due to interference tolerance or environmental differences between different batches of products. By controlling the parameter settings of the interference, the stability of the product can be improved, thereby enhancing the consistency of the cleaning effect.

[0016] In one possible implementation, the scraping structure is provided with a dirt collection trough for collecting dirt scraped off by the scraper from the roller mop; the dirt collection trough and the scraper are an integral structure.

[0017] The scraping structure is also provided with a filter port, which is located close to the scraper and is connected to the sludge collection tank.

[0018] In one possible implementation, the filter opening is disposed on the surface of the scraping structure facing the roller mop, and the scraper bar protrudes from the surface of the scraping structure facing the roller mop. Along the height direction of the self-moving cleaning device, the height of the scraper bar is less than or equal to the height of the lower end face of the filter opening.

[0019] In one possible implementation, the scraping structure further includes a filter element, and the sludge collection groove is detachably connected to the scraper blade;

[0020] The filter element is located inside the sludge collection tank and is detachably connected to the sludge collection tank. The filter element is provided with the filter port.

[0021] In one possible implementation, the scraping structure is provided with a drain outlet for communicating with the wastewater tank of the self-moving cleaning device, the drain outlet being used to connect the sludge collection tank and the wastewater tank;

[0022] Alternatively, the roller assembly may further include a liquid distribution component, which is connected to the water spray hole and is an integral part of the roller support; or, the liquid distribution component may be detachably connected to the roller support.

[0023] In one possible implementation, the interference fit is selected based on the cleaning mode requirements of the self-moving cleaning device:

[0024] When the self-moving cleaning device is in standard mopping mode, the interference fit is less than 2mm.

[0025] When the self-moving cleaning device is required to operate in a powerful squeezing mode, the interference fit is greater than or equal to 2 mm.

[0026] In one possible implementation, the outer periphery of the roller is provided with a flocking layer, the length of which is configured to affect the moisture content of the roller, and the length of the flocking layer is positively correlated with the moisture content of the roller.

[0027] In one possible implementation, the scraper includes an abutment portion for interference contact with the roller, the hardness of the abutment portion being configured to affect the moisture content of the roller, and the hardness of the abutment portion being negatively correlated with the moisture content of the roller.

[0028] In one possible implementation, the operating speed of the roller is configured to affect the moisture content of the roller, and the operating speed of the roller is negatively correlated with the moisture content of the roller.

[0029] In one possible implementation, the water retention rate of the roller is configured to affect the moisture content of the roller, and the water retention rate of the roller is positively correlated with the moisture content of the roller.

[0030] In one possible implementation, the scraping structure further includes a clamping structure abutting against the side of the scraper blade away from the roller; the clamping structure is used to apply a preload force toward the roller to the scraper blade so that the interference fit is maintained within the range of greater than or equal to 1.8 mm and less than or equal to 2.5 mm.

[0031] Secondly, according to some embodiments of this disclosure, a self-moving cleaning device is provided, comprising:

[0032] The roller assembly described in any of the above embodiments;

[0033] A base is provided with a receiving cavity for accommodating the roller assembly along the axial direction of the roller mop. The receiving cavity has a cleaning port on the side facing the surface to be cleaned, and the cleaning port is used for the roller mop to contact the surface to be cleaned. The receiving cavity has an opening at at least one end along the axial direction of the roller mop.

[0034] An outward displacement assembly is provided, at least for driving at least a portion of the roller assembly to extend out of the base from the opening, the roller assembly having an outwardly expanding position and an inwardly retracted position; when the roller assembly is in the outwardly expanding position, at least a portion of the roller assembly can extend out of the base, a portion of the roller assembly is located in a receiving cavity of the base, and another portion of the roller assembly extends beyond the outside of the base; when the roller assembly is in the inwardly retracted position, along the axial direction of the roller fabric, the portion of the roller assembly located in the receiving cavity is larger than the portion of the roller assembly located in the receiving cavity when the roller assembly is in the outwardly expanding position.

[0035] Thirdly, according to some embodiments of this disclosure, a self-moving cleaning device is provided, comprising:

[0036] Any of the roller assemblies described above;

[0037] The base has a receiving cavity along the axial direction of the roller mop for accommodating the roller assembly. A cleaning opening is provided on the side of the receiving cavity facing the surface to be cleaned, allowing the roller mop to contact the surface to be cleaned.

[0038] A lifting and displacement assembly, the lifting and displacement assembly being used at least to drive the roller assembly to rise or fall along the height direction of the base, the roller assembly falling so that the roller mop contacts the surface to be cleaned, and the roller assembly rising so that the roller mop has a gap with the surface to be cleaned.

[0039] Fourthly, according to some embodiments of this disclosure, a self-moving cleaning device is provided, comprising:

[0040] Any of the roller assemblies described above;

[0041] The base has a receiving cavity for accommodating the roller assembly along the axial direction of the roller mop. The receiving cavity has a cleaning port on the side facing the surface to be cleaned, and the cleaning port is used for the roller mop to contact the surface to be cleaned.

[0042] A roller cover, which covers at least a portion of the outer periphery of the roller mop, is rotatably connected at one end to an end of the roller assembly along the axial direction of the roller mop, and the other end of the roller cover is slidably connected to the roller assembly along the circumferential direction of the roller mop, such that the roller cover can be flipped downwards or upwards to have a blocking position and a clearance position.

[0043] The drive mechanism is disposed on the base or the roller assembly, and the drive mechanism is at least used to provide a power source for lifting or lowering the roller assembly and for flipping the roller cover downward or upward, so that the roller assembly has a raised position and a lowered position;

[0044] When the roller assembly is in the raised position, the roller cover is in the blocking position, and a portion of the roller cover is located between the roller mop and the surface to be cleaned, with a gap between the roller mop and the surface to be cleaned; when the roller assembly is in the lowered position, the roller cover is in the avoidance position, the roller cover is detached from the roller mop between the surface to be cleaned, and the roller mop is in contact with the surface to be cleaned.

[0045] In one possible implementation, when the roller cover is in the avoidance position along the travel direction of the self-moving cleaning device, the roller cover and the scraping structure are respectively located on both sides of the center of the roller mop.

[0046] In one possible implementation, a wastewater tank is also included, located behind the base along the travel direction of the self-moving cleaning device, with the scraping structure located on the side of the roller mop closer to the wastewater tank; or, the scraping structure is located on the side of the roller mop away from the wastewater tank.

[0047] The scraping structure is provided with a drain outlet, and the scraping structure is connected to the sewage tank through the drain outlet so that the sewage in the scraping structure can enter the sewage tank.

[0048] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0049] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0050] Figure 1 This is a three-dimensional structural schematic diagram of a self-moving cleaning device according to some embodiments of the present disclosure;

[0051] Figure 2 This is a three-dimensional structural schematic diagram of a roller assembly according to some embodiments of the present disclosure;

[0052] Figure 3 This is a cross-sectional structural schematic diagram of a roller assembly according to some embodiments of the present disclosure;

[0053] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0054] Figure 5 This is a three-dimensional structural schematic diagram of a cleaning structure according to some embodiments of the present disclosure;

[0055] Figure 6 This is a three-dimensional structural diagram illustrating the cooperation between a scraping structure and a roller support according to some embodiments of this disclosure;

[0056] Figure 7 This is a three-dimensional structural schematic diagram illustrating the cooperation between a scraping structure and a roller support according to some embodiments of this disclosure;

[0057] Figure 8 This is a three-dimensional structural schematic diagram illustrating a scraping structure and a roller bracket in cooperation with some embodiments of the present disclosure;

[0058] Figure 9 yes Figure 5 Enlarged view of point B in the middle;

[0059] Figure 10 This is a cross-sectional schematic diagram of another self-moving cleaning device according to some embodiments of the present disclosure;

[0060] Figure 11 This is a partial perspective structural schematic diagram of a roller assembly according to some embodiments of the present disclosure;

[0061] Figure 12 This is another cross-sectional view of another self-moving cleaning device according to some embodiments of the present disclosure;

[0062] Figure 13 yes Figure 12 Enlarged view of point C in the middle;

[0063] Figure 14 This is another perspective structural schematic diagram of a self-moving cleaning device according to some embodiments of the present disclosure;

[0064] Figure 15 This is a partial side view of a self-moving cleaning device when the roller cover is in the blocking position, according to some embodiments of the present disclosure.

[0065] Figure 16 This is a partial side view of a self-moving cleaning device when the roller cover is in an avoidance position, according to some embodiments of the present disclosure.

[0066] Explanation of reference numerals in the attached figures:

[0067] 10-Self-propelled cleaning equipment;

[0068] 100-Drum assembly;

[0069] 110-Drum support; 110a-Receiving cavity; 110b-Water spray hole;

[0070] 120-roller mop;

[0071] 130 - Scraping structure; 130a - Filter port; 130b - Drain outlet; 131 - Scraper bar; 132 - Sludge collection tank; 133 - Cover plate;

[0072] 140 - Compression structure;

[0073] 150-roller cover;

[0074] 160-Separation assembly;

[0075] 170 - Liquid piping;

[0076] 180 - Seal;

[0077] 190 - Transmission structure;

[0078] 200 - Base; 200a - Receiving cavity; 200b - Cleaning port; 200c - Opening;

[0079] 230 - Sewage tank. Detailed Implementation

[0080] Some embodiments of this disclosure will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. Various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but can be changed as will become apparent upon understanding this disclosure, except for operations that must be performed in a particular order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0081] The embodiments described in the following examples of this disclosure are not representative of all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0082] This application provides a self-moving cleaning device. This self-moving cleaning device includes, but is not limited to, a sweeping robot (including robots with one or more cleaning mechanisms), a floor scrubber (a robot with mopping function but no sweeping function), a sweeping and mopping robot, a floor scrubber, or a base station incorporating the aforementioned sweeping robot, floor scrubber, sweeping and mopping robot, or floor scrubber.

[0083] Taking a robotic vacuum cleaner as an example, a self-moving cleaning device can be used for automatic or assisted floor cleaning. Self-moving cleaning devices can reduce the physical exertion of manual cleaning through mechanization and automation technologies, and can improve cleaning efficiency and convenience. The self-moving cleaning device in this application embodiment can be applied to home or industrial environments, and is not limited thereto.

[0084] Self-propelled cleaning devices may include a roller assembly. The roller assembly may include a roller holder and a roller mop. The roller mop is mounted on the roller holder. The roller holder has spray nozzles for supplying cleaning fluid (such as water or detergent) to the roller mop. Spraying cleaning fluid onto the roller mop wets and cleans the roller, allowing the roller mop to perform wet mopping on the surface to be cleaned.

[0085] The self-propelled cleaning device may include a liquid dispensing assembly. The liquid dispensing assembly may be connected to a water spray nozzle, allowing the nozzle to spray cleaning liquid onto the roller. The liquid dispensing assembly and the roller support may be an integral or separate structure; this is not limited in the embodiments of this application.

[0086] In some examples, the roller support may be provided with flow channels. The flow channels are connected to the spray nozzles. Liquid from the dispensing assembly can flow along the flow channels into the spray nozzles to spray liquid onto the roller.

[0087] The flow channel and the roller support can be an integral structure, or the flow channel and the roller support can be detachably connected.

[0088] The roller mop rotates around its own axis, and cleaning fluid can be sprayed onto the roller mop for deep cleaning of the surface to be cleaned via the wet mopping function. A scraper can be installed on the roller support. The scraper, in contact with the roller mop, removes excess liquid from the surface of the mop, controlling the degree of wetness of the surface to be cleaned.

[0089] The essence of self-propelled cleaning equipment is to slightly dampen the roller mop to moisten and soften stains, making them easier to remove. The moisture content of the roller mop is crucial to cleaning effectiveness. If the mop is too wet, the surface will be excessively wet, leaving noticeable water stains and marks, affecting cleaning results, hindering user activity, and increasing drying time. Excessive liquid can seep into wooden floors, potentially causing warping, mold, and unpleasant odors. Furthermore, an overly wet mop attracts dust, hair, and other debris, becoming dirty and sticky, making the surface dirtier with each mop. Additionally, since the roller mop is connected to the motor, excessive moisture can seep into the motor, affecting its lifespan, damaging it, or even posing a safety hazard.

[0090] If the moisture content of the roller mop is too low, there will be dry friction between the mop and the surface to be cleaned. Stubborn stains on the surface cannot be dissolved, resulting in poor cleaning performance. The high dry friction resistance between the roller mop and the surface leads to greater wear and tear on the mop, affecting its lifespan and increasing consumable costs. It also easily causes excessive load on the motor, affecting its performance and the battery life of the self-propelled cleaning device. Furthermore, when the moisture content of the roller mop is too low, the uneven water distribution can easily cause watermarks on the surface, affecting cleaning effectiveness. In particular, when the roller mop is extremely dry, it can easily stir up dust on the surface during cleaning, causing secondary pollution to the air and the surface.

[0091] Therefore, this application provides a roller assembly 100 and a self-moving cleaning device 10, which can control the moisture content of the roller mop 120 by controlling the interference fit t between the scraper 131 and the roller mop 120, thereby solving the above-mentioned technical problems. The structure of the roller assembly 100 and the self-moving cleaning device 10 provided in this application embodiment will be described below with reference to the accompanying drawings.

[0092] See Figures 1 to 8 As shown, the roller assembly 100 may include a roller support 110, a roller mop 120, and a smearing structure 130.

[0093] See Figure 3 As shown, the roller mop 120 is rotatably mounted. The axial direction of the roller mop 120 is parallel to the plane containing the base 200 of the self-propelled cleaning device 10. A roller support 110 covers the roller mop 120, with a portion of the roller support 110 covering the roller mop 120. The roller mop 120 is at least partially located within the receiving cavity 110a of the roller support 110. See also... Figure 8 As shown, the roller support 110 is provided with a water spray hole 110b for supplying liquid to the roller mop 120.

[0094] See Figure 3 , Figures 5 to 8 As shown, the scraping structure 130 is connected to the roller support 110. Part of the scraping structure 130 is located in the receiving cavity 110a. The surface of the scraping structure 130 facing the roller mop 120 is provided with a scraper 131. Along the traveling direction of the self-moving cleaning device 10, the scraper 131 is positioned towards the roller mop 120, and the scraper 131 and the roller mop 120 are in interference contact.

[0095] Among them, see Figure 4 As shown, the interference t between the scraper 131 and the roller mop 120 is greater than or equal to 1.8 mm and less than or equal to 2.5 mm. The interference t is negatively correlated with the moisture content of the roller mop 120.

[0096] It should be noted that the interference amount t between the scraper 131 and the roller mop 120 is between 1.8mm and 2.5mm, which can mean that the interference amount t between the scraper 131 and the roller mop 120 is any value between 1.8mm and 2.5mm, including 1.8mm and 2.5mm. For example, the interference amount t can be 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, etc.

[0097] The scraper 131 is in interference fit with the roller mop 120. In other words, the scraper 131 and the outer surface of the roller mop 120 can maintain a slightly pressurized fit. A portion of the scraper 131 can extend into the nap of the roller mop 120 to physically scrape off some of the liquid on the roller mop 120.

[0098] It is easy to understand that if the scraper 131 does not contact the roller mop 120, the scraper 131 cannot remove dirt from the surface of the roller mop 120. If the contact between the scraper 131 and the roller mop 120 is too tight, it will easily wear down the roller mop 120, affecting its service life and increasing power consumption, thus affecting its endurance. Therefore, the scraper 131's ability to remove liquid from the roller mop 120 is directly related to the interference fit t between the scraper 131 and the roller mop 120, and the interference fit t between the scraper 131 and the roller mop 120 can affect the cleaning effect and cleaning efficiency of the self-propelled cleaning device 10.

[0099] The interference t between the scraper blade 131 and the roller mop 120 refers to the radial compression gap between the scraper blade 131 and the roller mop 120 when the roller mop 120 is stationary. In other words, the distance between the end of the scraper blade 131 near the center of the roller mop 120 and the center of the roller mop 120 is less than the diameter of the roller mop 120. The distance from the end of the scraper blade 131 near the center of the roller mop 120 to the outer diameter of the roller mop 120 is the interference t.

[0100] In this embodiment, by setting the interference amount t between the scraper 131 and the roller mop 120 as the only variable, and fixing other parameters (such as the material of the roller mop 120, the material of the scraper 131, the working speed, etc.), multiple sets of experiments are conducted to establish a reproducible quantitative relationship model of "interference amount t-moisture content" through experimental data. Based on this model, the optimal interference amount t parameter range between the scraper 131 and the roller mop 120 is directly determined, so that the self-moving cleaning device 10 can meet the cleaning needs of the application scenario.

[0101] Specifically, in this embodiment, three sets of self-moving cleaning devices 10 with different interference fits t between the scraper blades 131 and the roller mop 120 are provided and tested multiple times under the same test conditions. The main unit of each of the three self-moving cleaning devices 10 is placed on a tiled floor, and the rotation of the roller mop 120 can be controlled by a host computer. The interference fits t between the scraper blades 131 and the roller mop 120 of the three sets of self-moving cleaning devices 10 are 1.8mm, 2.0mm, and 2.2mm, respectively. Fixed parameters include the material of the roller mop 120, the bristle length of the roller mop 120, the material of the scraper blades 131, and the operating speed. The main material of the roller mop 120 is polyester fiber, incorporating silver ion antibacterial components. The bristle length of the roller mop 120 is 7mm. The scraper blades 131 are made of PC. The operating speed of the roller mop 120 is 300 rpm.

[0102]

[0103] Table 1

[0104] Referring to Table 1, in the three sets of self-propelled cleaning devices 10, the roller mop 120 weighs 165g in its dry state. The liquid dispensing assembly 160 dispenses the same volume of cleaning liquid to the roller mop 120 and wets the roller mop 120 through the spray nozzle 110b. The wet roller mop 120 weighs 265g.

[0105] When the interference fit t between the scraper 131 and the roller mop 120 is 1.8 mm, and the roller mop 120 rotates for 1 minute, so that the scraper 131 acts on the roller mop 120 for 1 minute, the weight of the roller mop 120 is 237.12 g. Therefore, by setting the interference fit t between the scraper 131 and the roller mop 120 to 1.8 mm, the moisture content of the roller mop 120 can be made to be 72.12 g.

[0106] When the interference fit t between the scraper 131 and the roller mop 120 is 2mm, and the roller mop 120 rotates for 1 minute, the weight of the roller mop 120 is 233.8g when the scraper 131 acts on the roller mop 120 for 1 minute. Therefore, by setting the interference fit t between the scraper 131 and the roller mop 120 to 2mm, the moisture content of the roller mop 120 can be made to be 68.8g.

[0107] When the interference fit t between the scraper 131 and the roller mop 120 is 2.2 mm, and the roller mop 120 rotates for 1 minute so that the scraper 131 acts on the roller mop 120 for 1 minute, the weight of the roller mop 120 is 232.53 g. Therefore, by setting the interference fit t between the scraper 131 and the roller mop 120 to 2.2 mm, the moisture content of the roller mop 120 can be made to be 67.53 g.

[0108] Therefore, it can be concluded that when the interference fit t between the scraper 131 and the roller mop 120 is large, the portion of the scraper 131 extending into the roller mop 120 is larger, and the contact area between the scraper 131 and the roller mop 120 is larger. This results in a greater squeezing force exerted by the scraper 131 on the surface of the roller mop 120, thus allowing more liquid to be squeezed out of the roller mop 120, resulting in less liquid remaining on the roller mop 120. Consequently, when the roller mop 120 cleans the surface to be cleaned, less liquid remains on the surface.

[0109] Conversely, when the interference fit t between the scraper 131 and the roller mop 120 is small, the portion of the scraper 131 extending into the roller mop 120 is smaller, and the contact area between the scraper 131 and the roller mop 120 is smaller. This results in a smaller squeezing force exerted by the scraper 131 on the surface of the roller mop 120. Consequently, a smaller portion of the liquid on the roller mop 120 can be squeezed out, leaving more liquid residue on the roller mop 120. When the roller mop 120 cleans the surface to be cleaned, more liquid remains on that surface.

[0110] Referring to Table 1, when the interference fit t between the scraper 131 and the roller mop 120 is 1.8 mm, the moisture content of the roller mop 120 is greater than 70 g, indicating a high moisture content. Therefore, when the interference fit t between the scraper 131 and the roller mop 120 is less than 1.8 mm, the excessive moisture content of the roller mop 120 easily creates numerous and noticeable watermarks on the surface to be cleaned, leading to increased drying time and affecting cleaning efficiency. Furthermore, when the surface to be cleaned is wood flooring, excessive watermarks can easily cause the wood flooring to become damp and deformed.

[0111] When the interference fit t between the scraper 131 and the roller mop 120 is 2.5mm, the moisture content of the roller mop 120 is low. Therefore, when the interference fit t between the scraper 131 and the roller mop 120 is greater than 2.5mm, the moisture content of the roller mop 120 is too low, and the roller mop 120 is used for dry scraping on the surface to be cleaned, resulting in poor cleaning effect on the stains on the surface to be cleaned.

[0112] In summary, by setting the interference fit t between the scraper 131 and the roller mop 120 to be greater than or equal to 1.8 mm and less than or equal to 2.5 mm, different cleaning needs can be met. Since the interference fit t between the scraper 131 and the roller mop 120 is negatively correlated with the moisture content of the roller mop 120, a specific interference fit t can be set according to cleaning requirements to adapt to different cleaning needs and thus meet the user's specific requirements.

[0113] For example, when the surface to be cleaned is wood flooring, the interference fit t can be set to ensure a lower moisture content in the roller mop 120. This reduces the likelihood of excessive liquid residue on the wood flooring due to high moisture content, which could lead to warping or mold growth. Therefore, when cleaning wood flooring, the squeegee 131 and roller mop 120 can be set to have a relatively large interference fit t. When the surface to be cleaned is tile or stone flooring, a higher moisture content can help improve the penetration of the cleaning agent, making it easier to remove stubborn stains. Therefore, when cleaning tile or stone surfaces, the squeegee 131 and roller mop 120 can be set to have a relatively small interference fit t.

[0114] In some examples, the scraper 131 can be flexibly mounted on the scraping structure 130. Therefore, the interference fit t between the scraper 131 and the roller mop 120 is controllable. When cleaning different surfaces, the interference fit t between the scraper 131 and the roller mop 120 can be made different to achieve the best cleaning effect on different surfaces.

[0115] Furthermore, it's easy to understand that when the roller mop 120 has a higher moisture content, it can be used for deep cleaning of the surface. The high moisture content of the roller mop 120 can soak stubborn stains on the surface, softening them and achieving a powerful cleaning effect. Therefore, in this scenario, a relatively small interference fit t can be set between the scraper 131 and the roller mop 120. Conversely, when a light daily cleaning is required, a relatively large interference fit t can be set between the scraper 131 and the roller mop 120. This allows the moisture content of the roller mop 120 to be adapted to the user's needs for different cleaning intensities.

[0116] Furthermore, the parameter settings based on the quantitative model in this application embodiment can improve the stability of the performance of the self-moving cleaning device 10. For example, the moisture content of the roller mop 120 may fluctuate due to interference tolerance t or environmental differences between different batches of products. By controlling the parameter setting of interference t, the stability of the product can be improved, thereby enhancing the consistency of the cleaning effect.

[0117] In some examples, the scraping structure 130 and the roller support 110 can be an integral structure to save assembly steps and improve assembly efficiency and cost. Alternatively, the scraping structure 130 and the roller support 110 can be detachably connected to facilitate cleaning of the scraping structure 130. No limitation is made in the embodiments of this application.

[0118] The scraper 131 and the scraping structure 130 can be an integral structure, or the scraper 131 can be detachably connected to the scraping structure 130, which is not limited in this embodiment.

[0119] In some feasible methods, the interference fit t is selected based on the cleaning mode requirements of the self-moving cleaning device 10: when the self-moving cleaning device 10 requires a standard mopping mode, the interference fit t is less than 2mm. When the self-moving cleaning device 10 requires a powerful squeegee mode, the interference fit t is greater than or equal to 2mm.

[0120] It should be noted that the standard mopping mode of the self-propelled cleaning device 10 can refer to a cleaning mode with a higher water content on the roller mop 120, used for daily cleaning of surfaces awaiting cleaning, or for cleaning tile or stone surfaces awaiting cleaning. The powerful squeegee mode of the self-propelled cleaning device 10 can refer to a cleaning mode with a lower water content on the roller mop 120, used for cleaning wooden floors or other surfaces awaiting cleaning.

[0121] Therefore, the embodiments of this application can improve the adaptability of the self-moving cleaning device 10 to diverse cleaning scenarios. By adjusting the interference fit t between the scraper 131 and the roller mop 120, it can flexibly adapt to cleaning modes with high moisture content requirements and cleaning modes with low moisture content requirements, thus meeting the personalized needs of users.

[0122] When cleaning wooden floors awaiting cleaning, the interference fit t between the squeegee 131 and the roller mop 120 can be set to at least 2mm. This relatively large interference fit t increases the squeezing force of the squeegee 131 on the roller mop 120, allowing the squeegee 131 to squeeze out more liquid from the roller mop 120 and reduce its moisture content. When cleaning tile surfaces awaiting cleaning, a higher moisture content helps improve the penetration of the cleaning agent, making it easier to remove stubborn stains. Therefore, when cleaning tiles and waiting for the cleaning surface to be cleaned, the interference t between the scraper 131 and the roller mop 120 can be set to be less than 2mm. By using the relatively small interference t between the scraper 131 and the roller mop 120, the squeezing force of the scraper 131 on the roller mop 120 can be reduced. As a result, the scraper 131 can squeeze out a relatively small amount of liquid inside the roller mop 120, so that the roller mop 120 has a relatively high moisture content.

[0123] For example, in the standard mopping mode, the interference t between the scraper 131 and the roller mop 120 can be 1.8 mm. When the scraper 131 acts on the roller mop 120 for 1 minute, the water content of the roller mop 120 can be about 70 g.

[0124] For example, in the powerful shaving mode, the interference t between the squeegee 131 and the roller mop 120 can be 2mm. When the squeegee 131 acts on the roller mop 120 for 1 minute, the water content of the roller mop 120 can be about 68g.

[0125] In some feasible ways, the length of the pile layer of the roller mop 120, the contact portion of the scraper 131 for interference contact with the roller mop 120, the operating speed of the roller mop 120, and the water retention rate of the roller mop 120 are configured to slightly affect the moisture content of the roller mop 120.

[0126] The outer periphery of the roller mop 120 may be provided with a flocking layer. The length of the flocking layer is positively correlated with the moisture content of the roller mop 120.

[0127] It should be noted that the flocking layer of the roller mop 120 can refer to the outermost fiber layer or bristle layer of the roller mop 120 that directly contacts the surface to be cleaned. The flocking layer can fit into the gaps on the surface to be cleaned. The rotation of the roller mop 120 can create a continuous scraping force on the surface to be cleaned, thereby removing dust, stains, and other contaminants.

[0128] The flocked layer serves as the water storage carrier for the roller mop 120. The length of the flocked layer can affect the moisture content of the roller mop 120. Under the same material and density, the longer the flocked layer, the higher the basic moisture content that the roller mop 120 can bear. Therefore, the length of the flocked layer is positively correlated with the moisture content of the roller mop 120.

[0129] In the low-moisture cleaning mode of the roller mop 120, the interference fit t between the scraper 131 and the roller mop 120 is set to be relatively large, so that the scraper 131 can scrape off more liquid inside the roller mop 120. In the high-moisture cleaning mode of the roller mop 120, the interference fit t between the scraper 131 and the roller mop 120 is set to be relatively small, so that the scraper 131 can scrape off a small amount of liquid inside the roller mop 120.

[0130] In some examples, when the length of the flock layers is equal, the density of the flock layers can also affect the moisture content of the roller mop 120. The higher the density of the flock layers, the higher the base moisture content that the roller mop 120 can withstand, and the density of the flock layers is positively correlated with the moisture content of the roller mop 120.

[0131] In some possible implementations, the scraper 131 includes an abutment portion for interference contact with the roller mop 120. The hardness of the abutment portion is negatively correlated with the moisture content of the roller mop 120.

[0132] The abutting portion of the scraper 131 in this embodiment can be used to apply an interference fit to the roller mop 120 to scrape off excess liquid and stains from the roller mop 120. The hardness of the abutting portion can affect the scraping ability of the scraper 131 to remove liquid from the roller mop 120.

[0133] When the hardness of the contact part is low, during the rotation of the roller mop 120 and its interference fit with the contact part, the contact part deforms, reducing the contact force on the roller mop 120. This allows the contact part to scrape off a relatively small amount of liquid from the roller mop 120, resulting in a relatively high moisture content. When the hardness of the contact part is high, during the rotation of the roller mop 120 and its interference fit with the contact part, the contact force exerted by the contact part on the roller mop 120 is greater, scraping off a relatively larger amount of liquid from the roller mop 120, thus reducing the moisture content of the roller mop 120.

[0134] In some feasible ways, the operating speed of the roller mop 120 is negatively correlated with the moisture content of the roller mop 120.

[0135] The centrifugal force generated by the rotation of the roller mop 120 can displace the liquid inside the roller mop 120. According to the centrifugal force formula F=mv 2 / r, where F is the outward centrifugal force experienced by the roller mop 120 during rotation; m is the mass of the roller mop 120; v is the linear velocity of the roller mop 120; and r is the radius of the roller mop 120. Therefore, at higher rotational speeds, the centrifugal force increases quadratically, allowing a relatively large amount of liquid inside the roller mop 120 to be ejected to the outside, resulting in a relatively low water content in the roller mop 120. Conversely, at lower rotational speeds, the centrifugal force is smaller, allowing a smaller amount of liquid inside the roller mop 120 to be ejected to the outside, resulting in a relatively high water content in the roller mop 120.

[0136] In some feasible ways, the water retention rate of the roller mop 120 is positively correlated with the moisture content of the roller mop 120.

[0137] It should be noted that the water retention rate of the roller mop 120 refers to the ratio of the mass of water remaining on the roller mop 120 after it has absorbed liquid, without external pressure or centrifugal force, to the total mass of water when the roller mop 120 is saturated with liquid. The water retention rate of the roller mop 120 is a fundamental physical property and is unaffected by factors such as the rotational speed of the roller mop 120 or the hardness of the scraper 131.

[0138] Under the same initial water absorption capacity, the higher the water retention rate of the roller mop 120, the higher the water content retained in the roller mop 120. The lower the water retention rate of the roller mop 120, the lower the water content retained in the roller mop 120.

[0139] See also some of the possible implementation methods. Figure 5 and Figure 6 As shown, the roller assembly 100 may further include a clamping structure 140. The clamping structure 140 abuts against the scraping structure 130. The clamping structure 140 is used to apply a preload force toward the roller mop 120 to the scraper 131, such that the interference t is maintained within the range of greater than or equal to 1.8 mm and less than or equal to 2.5 mm.

[0140] It is easy to understand that after long-term use and wear, the nap of the roller mop 120 becomes flatter and its diameter decreases. At this time, insufficient interference fit t between the scraper 131 and the roller mop 120 will affect the moisture content of the roller mop 120. Therefore, by setting the clamping structure 140, the scraper 131 can maintain a preload on the roller mop 120. This allows the scraper 131 to move towards the roller mop 120 under the action of the clamping structure 140 when the roller mop 120 wears down, preventing a decrease in interference fit t due to wear and shrinkage of the roller mop 120. The scraper 131 and the roller mop 120 can be kept within a preset interference fit t range, thus ensuring that the moisture content of the roller mop 120 matches the cleaning needs of the application scenario.

[0141] In some examples, the clamping structure 140 can actively control the scraper 131 to remain in contact with the roller mop 120. Alternatively, the clamping structure 140 can use an elastic element such as a torsion spring to passively engage the scraper 131 with the roller mop 120, so that the interference fit can be greater than or equal to 1.8 mm and less than or equal to 2.5 mm.

[0142] In some examples, the scraping structure 130 is rotatably connected to the roller support 110. One end of the clamping structure 140 is connected to the roller support 110, and the other end of the clamping structure 140 is connected to the scraping structure 130.

[0143] In some examples, the clamping structure 140 may abut against the surface of the scraping structure 130 facing away from the roller mop 120. The clamping structure 140 may push the scraping structure 130 from the side facing away from the roller mop 120 toward the roller mop 120, thereby keeping the interference t between the scraper 131 and the roller mop 120 within the range of greater than or equal to 1.8 mm and less than or equal to 2.5 mm.

[0144] For example, the clamping structure 140 may be, but is not limited to, a torsion spring. The torsion spring may be used to provide preload to the scraper 131 toward the roller mop 120.

[0145] In this embodiment, after the water spray hole 110b sprays cleaning fluid onto the roller mop 120 to wet the roller mop 120, the roller mop 120 rotates to actively sweep up dirt from the surface to be cleaned. The scraper 131 of the scraping structure 130 can be used to scrape off solid dirt (such as debris, hair, etc.) and liquid dirt (such as excess liquid, sewage, etc.) on the roller mop 120.

[0146] By setting the interference fit t between the scraper 131 and the roller mop 120 to be greater than or equal to 1.8 mm and less than or equal to 2.5 mm, a quantified dimensional fit can be achieved, ensuring a micro-pressure fit and a non-jamming fit between the scraper 131 and the roller mop 120. This allows the moisture content of the roller mop 120 to be maintained within the requirements of the self-propelled cleaning device 10 for daily cleaning scenarios. Therefore, while ensuring the cleaning performance of the self-propelled cleaning device 10, it can operate stably, and the scraper 131 and roller mop 120 are less likely to produce abnormal noises due to jamming or increase the operating load of the self-propelled cleaning device 10.

[0147] See also some of the possible implementation methods. Figure 5 and Figure 7 As shown, the scraping structure 130 is provided with a sludge collection tank 132. The sludge collection tank 132 is used to collect dirt scraped off by the scraper 131 from the roller mop 120. The sludge collection tank 132 and the scraper 131 are an integral structure. The scraping structure 130 is also provided with a filter port 130a. The filter port 130a is located close to the scraper 131 and is connected to the sludge collection tank 132.

[0148] In this embodiment, by setting the filter port 130a close to the scraper 131, the scraper 131 scrapes away the dirt generated during the cleaning process of the roller mop 120. The dirt enters the dirt collection tank 132 directly through the filter port 130a near the scraper 131, reducing the likelihood of dirt being carried to other structures, causing solid particles to become stuck in the self-moving cleaning device, affecting the normal operation and cleanliness of the self-moving cleaning device 10. By scraping the dirt off the roller mop 120 with the scraper 131, the roller mop 120 can be kept clean, thereby reducing the possibility that dirt on the roller mop 120 will make the surface to be cleaned dirtier with each cleaning.

[0149] In some examples, liquid dirt scraped off by the scraper 131 and the roller mop 120 can enter the sludge collection tank 132 and be recycled to the wastewater tank 230. Solid dirt scraped off by the scraper 131 and the roller mop 120 can be conveyed to the wastewater tank 230 along the guide structure under the negative pressure of the blower.

[0150] In this embodiment, the sludge collection tank 132 can filter larger particles of dirt from the roller mop 120 through the filter port 130a, thereby cleaning the dirt on the roller mop 120. This prevents large particles of dirt from entering the sludge collection tank 132, improving the cleanliness of the liquid within the tank, facilitating liquid recycling, and saving energy. Furthermore, thanks to the filter port 130a, the liquid in the sludge collection tank 132 is less likely to block the liquid recovery path during its return to the wastewater tank 230 due to the presence of large particles of dirt.

[0151] Furthermore, when the liquid in the collection tank 132 is maintained at the preset liquid level, the liquid in the collection tank 132 can wet the roller mop 120 through the filter port 130a to soak the roller mop 120, thereby achieving soaking and cleaning of the roller mop 120, which is beneficial to improving the cleaning effect of the roller mop 120, and thus improving the cleaning effect of the surface to be cleaned.

[0152] The sludge collection tank 132 and the scraper blade 131 are integrated into one structure. This improves the connection reliability between the sludge collection tank 132 and the scraper blade 131, thus enhancing the overall strength of the scraping structure 130. Furthermore, the fixed relative position of the scraper blade 131 and the sludge collection tank 132 improves the stability of the relative position between the scraper blade 131 and the roller mop 120, thereby enhancing the cleaning effect of the scraper blade 131 on the roller mop 120. On the other hand, leakage between the scraper blade 131 and the sludge collection tank 132 is less likely to occur. No additional sealing structure is required between the scraper blade 131 and the sludge collection tank 132.

[0153] See also some of the possible implementation methods. Figure 5 and Figure 9 As shown, the filter port 130a is disposed on the surface of the scraping structure 130 facing the roller mop 120. The scraper bar 131 protrudes from the surface of the scraping structure 130 facing the roller mop 120. Along the height direction of the self-moving cleaning device 10, the height of the scraper bar 131 is less than or equal to the height of the lower end face of the filter port 130a.

[0154] In this embodiment, the height of the scraper 131 is set to be less than or equal to the height of the lower end face of the filter port 130a. When a portion of the roller mop 120 is located at the filter port 130a for soaking and cleaning, the scraper 131 can prevent liquid overflowing from the filter port 130a from dripping down onto the surface to be cleaned.

[0155] Among them, the filter port 130a can be, but is not limited to, a square hole, a long hole, a round hole, an oval hole, etc.

[0156] In some possible implementations, the scraping structure 130 also includes a filter element, with the sludge collection tank 132 detachably connected to the scraper blade 131. The filter element is located within the sludge collection tank 132 and is detachably connected to the sludge collection tank 132, and the filter element has a filter port 130a.

[0157] In this embodiment, the dirt scraped off by the scraper 131 from the roller mop 120 can enter the dirt collection tank 132. Solid particles are blocked by the filter element within the dirt collection tank 132 through the filter port 130a. Therefore, the liquid in the dirt collection tank 132 remains relatively clean due to the filter element, and the liquid in the dirt collection tank 132 can be used for real-time soaking and washing of the roller mop 120.

[0158] By detachably connecting the sludge collection tank 132 and the scraper 131, it is easy to rinse the sludge collection tank 132 and the scraper 131, so as to keep the scraping structure 130 clean. It can also reduce the possibility of bacteria and odor growing in the sludge collection tank 132.

[0159] The filter element is detachably connected to the sludge collection tank 132. The filter element can be cleaned or replaced periodically to maintain the cleanliness of the liquid in the sludge collection tank 132.

[0160] See also some of the possible implementation methods. Figure 10 As shown, the scraping structure 130 is provided with a drain outlet 130b for communicating with the wastewater tank 230 of the self-moving cleaning device 10. The drain outlet 130b is used to connect the sludge collection tank 132 and the wastewater tank 230.

[0161] In this embodiment, the wastewater in the collection tank 132 can enter the wastewater tank 230 through the drain outlet 130b, so that the liquid in the collection tank 132 can be kept clean, thereby enabling real-time soaking and cleaning of the roller mop 120, which is beneficial to improving the cleaning effect and cleaning efficiency of the surface to be cleaned.

[0162] In some examples, the wastewater tank 230 can be directly connected to the drain port 130b of the sludge scraping structure 130. Liquid in the sludge collection tank 132 can directly enter the wastewater tank 230 through the drain port 130b, minimizing the liquid flow path and reducing the possibility of leakage and energy consumption.

[0163] For example, a water receiving trough may be provided inside the wastewater tank 230. See also Figure 13 As shown, the drain outlet 130b can be located below the sludge collection tank 132. The opening direction of the sludge collection tank 132 can face the surface to be cleaned or it can face the wastewater tank 230. This is not limited in the embodiments of this application. Liquid in the sludge collection tank 132 can drip through the drain outlet 130b into the water receiving trough on the wastewater tank 230 under gravity or negative pressure. The water receiving trough is connected to the body of the wastewater tank 230. Therefore, under negative pressure, liquid in the water receiving trough can be drawn into the wastewater tank 230 through the inlet of the wastewater tank 230.

[0164] The drain outlet 130b of the scraper structure 130 may be equipped with a sealing element 180 to ensure a sealed connection between the scraper structure 130 and the wastewater tank 230. This prevents water leakage between the scraper structure and the wastewater tank 230.

[0165] Or see Figure 10As shown, the drain outlet 130b can also be located above the sludge collection tank 132. The scraping structure 130 can be connected to the wastewater tank 230 via a liquid pipe 170. Under the action of a motor, fan, etc., the liquid in the sludge collection tank 132 can enter the wastewater tank 230 through the liquid pipe 170. The liquid pipe 170 is flexible. Therefore, the spatial layout flexibility of the scraping structure 130 and the wastewater tank 230 on the self-propelled cleaning device 10 can be improved. A seal 180 is provided between the cover plate 133 and the sludge collection tank 132. Therefore, when the self-propelled cleaning device 10 travels to an uneven surface to be cleaned, such as a steep slope or a low-lying area, the liquid in the sludge collection tank 132 may flow out through the gap between the cover plate 133 and the sludge collection tank 132 and drip onto the surface to be cleaned.

[0166] The liquid pipeline 170 is sealed to the sludge scraping structure 130 and the sewage tank 230.

[0167] See also some of the possible implementation methods. Figure 3 and Figure 11 As shown, the roller assembly 100 also includes a liquid distribution assembly 160, which is connected to the water spray hole 110b. The liquid distribution assembly 160 and the roller support 110 are integrally formed; or, the liquid distribution assembly 160 is detachably connected to the roller support 110.

[0168] In this embodiment of the application, the liquid dispensing component 160 can be used to distribute the cleaning liquid to the spray nozzle 110b and spray it onto the roller mop 120 through the spray nozzle 110b to wet the roller mop 120.

[0169] By integrating the liquid separation component 160 with the roller support 110, the overall strength of the roller support 110 can be improved, and the structural integration of the roller support 110 can be increased, which helps to reduce the number of parts and lower production costs.

[0170] By detachably connecting the liquid dispensing assembly 160 to the roller bracket 110, the liquid dispensing assembly 160 can be easily cleaned, reducing the possibility of scale buildup inside the liquid dispensing assembly 160 clogging the spray nozzle 110b.

[0171] See also some of the possible implementation methods. Figure 12 and Figure 13 As shown, the sludge scraping structure 130 may also include a cover plate 133. The cover plate 133 can be used to cover the opening of the sludge collection tank 132.

[0172] See Figure 1 and Figure 14 As shown, this application also provides a self-moving cleaning device 10, which may include the roller assembly 100 and the base 200 in any of the above embodiments.

[0173] The base 200 is provided with a receiving cavity 200a for receiving the roller assembly 100 along the axial direction of the roller mop 120. The receiving cavity 200a is provided with a cleaning port 200b on the side facing the surface to be cleaned. The cleaning port 200b is used to allow the roller mop 120 to contact the surface to be cleaned. The receiving cavity 200a is provided with an opening 200c at at least one end along the axial direction of the roller mop 120.

[0174] The outward displacement component is used to drive at least a portion of the roller assembly 100 to extend out of the base 200 from the opening 200c. The roller assembly 100 has an outwardly expanded position and an inwardly retracted position. When the roller assembly 100 is in the outwardly expanded position, at least a portion of the roller assembly 100 can extend out of the base 200, with a portion of the roller assembly 100 located in the receiving cavity 200a of the base 200, and another portion of the roller assembly 100 extending beyond the outside of the base 200. When the roller assembly 100 is in the inwardly retracted position, along the axial direction of the roller feed 120, the portion of the roller assembly 100 located in the receiving cavity 200a is larger than the portion of the roller assembly 100 located in the receiving cavity 200a when the roller assembly 100 is in the outwardly expanded position.

[0175] In this embodiment, the outward displacement component can move relative to the base 200 of the self-moving cleaning device 10 to drive the roller assembly 100 to move axially, so that at least one end of the roller mop 120 can extend at least partially to the outside of the self-moving cleaning device 10, thereby enabling the roller mop 120 to clean edge areas such as corners, reducing or avoiding cleaning blind spots and improving user experience.

[0176] It is readily understood that the outward expansion displacement assembly allows the roller assembly 100 to expand outward along the axial direction of the roller mop 120. In this case, a portion of the roller mop 120 can be located within the receiving cavity 200a of the base 200, and another portion of the roller mop 120 can be located outside the self-moving cleaning device 10. The outward expansion displacement assembly also allows the roller assembly 100 to retract inward along the axial direction of the roller mop 120. In this case, the roller mop 120 can be located within the receiving cavity 200a of the base 200.

[0177] In this embodiment, during the cleaning task of the roller mop 120 expanding or retracting, the scraper 131, the liquid distribution assembly 160, the water spray hole 110b, the dirt collection tank 132, and the roller mop 120 can move synchronously. In both the expanding and retracting positions, the scraper 131 can continuously scrape away dirt from the roller mop 120, preventing the possibility of the roller mop 120 becoming increasingly dirty and the surface to be cleaned becoming dirtier with each pass. Furthermore, the synchronous movement of the scraper 131 and the roller mop 120 ensures that the interference fit t between the scraper 131 and the roller mop 120 is maintained within a range of greater than or equal to 1.8 mm and less than or equal to 2.5 mm. This reduces the possibility that separation between the scraper 131 and the roller mop 120 could affect the consistency of the interference fit t during expansion or retraction, thereby impacting the cleaning effect on the surface to be cleaned.

[0178] This application also provides a self-moving cleaning device 10, which may include the roller assembly 100, base 200 and lifting displacement assembly in any of the above embodiments.

[0179] The base 200 is provided with a receiving cavity 200a for receiving the roller assembly 100 along the axial direction of the roller mop 120. The receiving cavity 200a is provided with a cleaning port 200b on the side facing the surface to be cleaned. The cleaning port 200b is used for the roller mop 120 to contact the surface to be cleaned.

[0180] The lifting displacement assembly is used at least to drive the roller assembly 100 to rise or fall along the height direction of the base 200, the roller assembly 100 falling so that the roller mop 120 contacts the surface to be cleaned, and the roller assembly 100 rising so that the roller mop 120 has a gap with the surface to be cleaned.

[0181] It should be noted that the lifting displacement component and the external displacement component can be two independent structures. Alternatively, the lifting displacement component and the external displacement component can be a single integrated structure.

[0182] In this embodiment, the self-propelled cleaning device 10 has at least a single-sweeping working state and a sweeping and mopping working state. In the single-sweeping working state, the roller assembly 100 can be raised, and the roller mop 120 stops rotating. The roller brush of the central sweeping assembly and / or the side brush of the side sweeping assembly 250 rotates. In the sweeping and mopping working state, the roller assembly 100 can be lowered until the roller mop 120 contacts the surface to be cleaned, and the roller mop 120 can rotate to clean the surface to be cleaned.

[0183] It should be noted that, in this embodiment, the wet mopping area can refer to areas such as tiles or floors that can be mopped. In wet mopping mode, the self-propelled cleaning device 10 can use wet cleaning components (such as roller mops) to mop the wet mopping area to clean the dirt. The non-wet mopping area can refer to areas that cannot be mopped, such as areas with carpets, that are cleaned using dry cleaning components (such as center sweepers or side sweepers). In non-wet mopping mode, the self-propelled cleaning device 10 performs single sweeping and vacuuming on the surface to be cleaned, without using the roller mop 120, and only uses dry cleaning components to clean everyday dust, hair, and other debris.

[0184] Understandably, when cleaning dry-sweeping areas, the roller assembly 100 is raised, and the roller mop 120 stops rotating. The roller brush and / or side brush rotate. Since the roller mop 120 does not contact the floor, it prevents carpets, high-end flooring, or water-sensitive materials such as paper and wood from getting wet. This provides dry sweeping conditions for the roller brush and side brush. When cleaning wet-mopping areas, the roller assembly 100 lowers to contact the surface to be cleaned, and the roller mop 120 rotates. The roller mop 120 can move between an inward-retracting position and an outward-expanding position, working in conjunction with the side sweeping assembly 250 and the center sweeping assembly to achieve the suction and sweeping of debris and the wiping of stains.

[0185] In this embodiment, during the lifting or lowering cleaning task of the roller assembly 100, the scraping structure 130 and the roller mop 120 can be raised or lowered synchronously, so that structures such as the scraper 131, the liquid distribution assembly 160, the water spray hole 110b, and the dirt collection tank 132 can move synchronously with the roller mop 120. Therefore, the scraper 131 can continuously scrape away dirt on the roller mop 120 to ensure the cleaning effect on the surface to be cleaned. During the lifting or lowering cleaning task of the roller mop 120, the scraper 131, the liquid distribution assembly 160, the water spray hole 110b, the dirt collection tank 132, and the roller mop 120 can move synchronously. In the raised and lowered positions, the scraper 131 can continuously scrape away dirt on the roller mop 120 to avoid the possibility that dirt on the roller mop 120 will make the surface to be cleaned dirtier with each cleaning. Furthermore, the synchronous movement of the scraper 131 and the roller mop 120 can keep the interference amount t between the scraper 131 and the roller mop 120 within a range of greater than or equal to 1.8 mm and less than or equal to 2.5 mm. This can reduce the possibility that the separation of the scraper 131 and the roller mop 120 will affect the consistency of the interference amount t, which may affect the outward expansion or inward contraction, and thus affect the cleaning effect on the surface to be cleaned.

[0186] This application also provides a self-propelled cleaning device 10, see [link]. Figure 3 , Figure 15 and Figure 16As shown, the self-moving cleaning device 10 may include the roller assembly 100, base 200 and drive mechanism in any of the above embodiments.

[0187] The base 200 is provided with a receiving cavity 200a for receiving the roller assembly 100 along the axial direction of the roller mop 120. The receiving cavity 200a is provided with a cleaning port 200b on the side facing the surface to be cleaned. The cleaning port 200b is used for the roller mop 120 to contact the surface to be cleaned.

[0188] The roller cover 150 covers at least a portion of the outer periphery of the roller mop 120. Along the axial direction of the roller mop 120, one end of the roller cover 150 is rotatably connected to the end of the roller assembly 100, and the other end of the roller cover 150 is slidably connected to the roller assembly 100 along the circumference of the roller mop 120, so that the roller cover 150 can be flipped down or up to have a blocking position and a clearance position.

[0189] A drive mechanism is disposed on the base 200 or the roller assembly 100. The drive mechanism is used to provide a power source for raising or lowering the roller assembly 100 and for tilting the roller cover 150 downward or upward, so that the roller assembly 100 has a raised position and a lowered position.

[0190] When the roller assembly 100 is in the raised position, the roller cover 150 is in the blocking position, and part of the roller cover 150 is located between the roller mop 120 and the surface to be cleaned, with a gap between the roller mop 120 and the surface to be cleaned; when the roller assembly 100 is in the lowered position, the roller cover 150 is in the avoidance position, the roller cover 150 is detached from the roller mop 120 and the surface to be cleaned, and the roller mop 120 contacts the surface to be cleaned.

[0191] In this embodiment, since the roller cover 150 can have both a blocking position and a clearance position, when cleaning a dry-sweeping area, the roller mop 120 can be in a raised position, and the roller cover 150 can be in a blocking position. A portion of the roller cover 150 can be located between the roller mop 120 and the surface to be cleaned. Therefore, the roller cover 150 can be used to prevent the wet roller mop 120 from contacting the dry-sweeping area, thereby reducing the risk of the carpet pile in the dry-sweeping area becoming wet, which could lead to problems such as mold, odor, pile damage, or bacterial growth.

[0192] In some examples, the self-moving cleaning device 10 can dry sweep the carpet using the side sweeping component and the center sweeping component to achieve carpet cleaning.

[0193] By controlling the movement of the roller mop 120 and the roller cover 150, the self-propelled cleaning device 10 can seamlessly switch between wet mopping and dry sweeping modes. Specifically, when cleaning hard floors or other wet-mopping areas, the self-propelled cleaning device 10 can operate in wet mopping mode. When cleaning carpets or other dry-sweeping areas, the self-propelled cleaning device 10 can automatically switch to dry sweeping mode to minimize wetting the carpet during cleaning. During this process, the self-propelled cleaning device 10 can operate stably without stopping, which improves cleaning efficiency and enhances the user experience.

[0194] The drive mechanism can provide power for the lifting and lowering of the roller assembly 100 and the downward and upward flipping of the roller cover 150. Therefore, the movement of the roller assembly 100 and the roller cover 150 can be realized without adding an additional drive mechanism to the self-moving cleaning device 10. This reduces the possibility of adding a drive mechanism and corresponding mechanical structure, which would lead to a complex structure, occupy a large space on the self-moving cleaning device 10, and affect the miniaturization and lightweight design of the self-moving cleaning device 10.

[0195] It's easy to understand that the miniaturized design of the self-propelled cleaning device 10 allows it to easily enter low, confined spaces such as under beds and sofas, reducing blind spots and improving the thoroughness and coverage of cleaning. Furthermore, it facilitates home storage. The lightweight design of the self-propelled cleaning device 10 reduces the load on the drive mechanism and the roller mop 120° rotation process, lowering energy consumption and improving battery life.

[0196] In some examples, the roller cover 150 can be connected to the roller assembly 100 via a transmission structure 190. The raising and lowering of the roller assembly 100 can cause the roller cover 150 to flip via the transmission structure 190, switching between an obstruction position and a clearance position. In other words, the roller cover 150 can be linked to the roller assembly 100 via the transmission structure 190. Therefore, when the roller assembly 100 is in the lowered position, the roller cover 150 can automatically flip upwards to the clearance position, and when the roller assembly 100 is in the raised position, the roller cover 150 can automatically flip downwards to the obstruction position. This reduces the possibility of delays in the engagement between the roller cover 150 and the roller assembly 100, which could lead to interference or other problems.

[0197] The transmission structure 190 may be located at one end of the roller assembly 100. For example, the transmission structure 190 may be located at one end of the roller assembly 100 away from the lateral opening 200c.

[0198] Alternatively, the roller cover 150 and the roller assembly 100 can be driven independently. The movements of the roller cover 150 and the roller assembly 100 are independent of each other. The lifting and lowering movement of the roller assembly 100 and the flipping movement of the roller cover 150 may not be directly related. When the roller assembly 100 is passively raised (over a threshold, electronic scale, etc.) but has not reached the raised position, the roller cover 150 can remain in the avoidance position, so that the roller cover 150 is less likely to flip downwards and rub or collide with the obstacle.

[0199] In some examples, the drive structure may include a transmission assembly for driving the roller cover 150 to rotate and a power source (e.g., an electric motor) for providing power to the transmission assembly. The transmission assembly may include, but is not limited to, a linkage assembly, gear drive, rack and pinion drive, etc. The transmission assembly transmits power from the power source to the connection portion 142 of the roller cover 150, enabling the roller cover 150 to rotate.

[0200] It is easy to understand that the transmission component can be mounted on the roller assembly 100. The transmission component, motor, and other structures can be located on the roller assembly 100 at the end furthest from the lateral opening 200c. For example, the transmission component can be mounted on the roller support 110.

[0201] The transmission structure 190 may be, but is not limited to, a single-link or multi-link structure.

[0202] In some possible implementations, along the height direction of the base 200, the roller assembly 100 has a sub-lifted position located anywhere between a lowered position and a raised position. Along the flipping path of the roller cover 150, the roller cover 150 has a sub-flipped position located anywhere between a clearance position and a blocking position. When the roller assembly 100 is in the sub-lifted position, the roller cover 150 is in either the clearance position or the sub-flipped position.

[0203] When the roller assembly 100 is in the sub-lifted position, the roller cover 150 can remain in the avoidance position, or the roller cover 150 can be in the sub-flipped position. Therefore, during the obstacle-crossing process of the self-propelled cleaning device 10, when the roller assembly 100 is passively lifted to the sub-lifted position, the roller cover 150 is less likely to continue to flip downwards and reach the blocking position, thereby reducing the possibility of the roller cover 150 colliding with the obstacle while in the blocking position. The obstacles here include traversable obstacles with a height relative to the ground, such as carpets, thresholds, steps, and electronic scales.

[0204] In some feasible ways, the height of the roller cover 150 relative to the surface to be cleaned when the roller cover 150 is in the sub-flipped position along the height direction of the base 200 is greater than or equal to the height of the roller assembly 100 relative to the surface to be cleaned when it is in the sub-lifted position.

[0205] In this embodiment, when the roller assembly 100 is passively raised to the sub-raised position, the roller cover 150 is located in the avoidance position or the sub-flipped position. Since the height of the bottom of the roller cover 150 relative to the surface to be cleaned is greater than or equal to the height of the bottom of the roller assembly 100 relative to the surface to be cleaned, the bottom of the roller cover 150 is less likely to collide with obstacles. This helps reduce friction between the roller cover 150 and obstacles, reducing the possibility of increased operating resistance of the self-moving cleaning device 10 and affecting its endurance. Furthermore, it also reduces the possibility of abnormal noise or damage to the roller cover 150 caused by friction between the roller cover 150 and obstacles.

[0206] For example, when the self-moving cleaning device 10 encounters an obstacle, the roller assembly 100 is passively raised to the sub-raised position, and the roller cover 150 can remain stationary or flip downwards at a small angle to reach the sub-flipped position. After the roller assembly 100 overcomes the obstacle, the roller cover 150 can quickly flip from the sub-flipped position to the blocking position to prevent liquid on the roller mop 120 from dripping onto the surface to be cleaned.

[0207] In some examples, the roller cover 150 can remain in the sub-flipped position under the action of a power source such as a motor and a transmission component, so that the roller cover 150 can be maintained in the sub-flipped position. Alternatively, the roller cover 150 can continue to move upward or downward to reach the raised or lowered position after passing the sub-flipped position under the action of the transmission component.

[0208] In some feasible implementations, the roller cover 150 is provided with a handle. The handle is located on the cover body 141. Along the axial direction of the roller cloth 120, the handle is located near the end of the cover body 141.

[0209] In this embodiment of the application, the handle position can be used to facilitate the user to hold the roller cover 150 when disassembling the roller cover 150.

[0210] In some examples, the roller cover 150 can be removed from the roller support 110, and the handle provides the user with a force-free and convenient point of application. Therefore, the user can easily remove the roller cover 150 by operating the handle to clean up hair and other thread-like objects, solid and liquid dirt, and other debris entangled on the roller cover 150.

[0211] In particular, when the roller cover 150 is controlled independently, that is, when the roller cover 150 and the roller assembly 100 are not linked, the user can flip the roller cover 150 by using the handle to clean the debris between the roller cover 150 and the receiving cavity and the roller mop 120. This can reduce the possibility of debris getting stuck between the roller cover 150 and the roller bracket and the roller mop 120, affecting the normal operation of the self-moving cleaning equipment.

[0212] In some examples, the handle can be a groove structure or a raised handle structure, but this application embodiment does not limit it.

[0213] Along the axial direction of the roller cloth 120, the end of the cover 141 is provided with a connecting part 142. The roller cover 150 can be fixed to the roller bracket 110 through the connecting part 142.

[0214] The connecting part 142 and the cover 141 can be an integral structure. Alternatively, the connecting part 142 and the cover 141 can be detachably connected by means of snap-fit, screw connection, or other methods.

[0215] When the connecting part 142 is detachably connected to the cover 141, it facilitates cleaning of the roller cover 150. When the connecting part 142 and the cover 141 are an integral structure, the roller cover 150 has better structural strength.

[0216] When the connecting part 142 is detachably connected to the cover 141, it facilitates cleaning of the roller cover 150. When the connecting part 142 and the cover 141 are an integral structure, the roller cover 150 has better structural strength.

[0217] In some examples, when the connecting part 142 engages with the cover 141, a latch may be provided on the roller cover 150. For example, a latch may be provided on the connecting part 142. The latch can be used to lock or unlock the connecting part 142 and the cover 141 by pressing or sliding.

[0218] For example, when the latch is pressed, it can unlock the connecting portion 142 and the cover 141. At this time, the cover 141 can be directly removed from the connecting portion 142 for cleaning the roller cover 150. Alternatively, after the latch unlocks the connecting portion 142 and the cover 141, the cover 141 can be rotated about the axial direction of the roller cover 150. When the roller cover 150 is in the clearance position, more of the cover 141 is exposed outside the receiving cavity 110a, making disassembly easier.

[0219] Users can operate the handle to remove the cover 141.

[0220] See also some of the possible implementation methods. Figure 3 As shown, when the roller cover 150 is in the avoidance position along the travel direction of the self-moving cleaning device 10, the roller cover 150 and the scraping structure 130 are located on both sides of the center of the roller mop 120.

[0221] In this embodiment, when the roller cover 150 is in the avoidance position, the roller cover 150 and the scraping structure 130 are located on opposite sides of the center of the roller mop 120. Therefore, the flipping action of the roller cover 150 is less likely to collide with the scraping structure 130.

[0222] In some examples, the roller cover 150 can be folded up within the front space of the roller mop 120. The scraping structure 130 can be located in the rear space of the roller mop 120 and close to the wastewater tank 230. Therefore, the sludge collection trough 132 can be close to the wastewater tank 230, thereby reducing the suction path and making the structure of the self-propelled cleaning device 10 more compact. Furthermore, a shorter suction path helps reduce suction power loss and improves the efficiency of wastewater discharge from the collection trough. It also prevents solid dirt such as hair from clogging the suction pipes.

[0223] See also some of the possible implementation methods. Figure 1 As shown, the system also includes a wastewater tank 230, which is located behind the base 200 along the travel direction of the self-propelled cleaning device 10. The scraping structure 130 is located on the side of the roller mop 120 closest to the wastewater tank 230. Alternatively, the scraping structure 130 is located on the side of the roller mop 120 furthest from the wastewater tank 230. The scraping structure 130 has a drain port 130b, which connects the scraping structure 130 to the wastewater tank 230, allowing wastewater from the scraping structure 130 to enter the wastewater tank 230.

[0224] In this embodiment, by setting the sludge scraping structure 130 close to the sewage tank 230, the path for the liquid in the sludge collection tank 132 to enter the sewage tank 230 is shorter, which helps to reduce the possibility of leakage due to the long sludge suction path.

[0225] In this embodiment, the scraping structure 130 can be disposed on the front side of the roller mop 120 along the traveling direction of the self-propelled cleaning device 10. Alternatively, the scraping structure 130 can also be disposed on the rear side of the roller mop 120, which is not limited in this application embodiment.

[0226] In some feasible implementations, the self-propelled cleaning device 10 may also include an in-situ detection device. The in-situ detection device can be used to detect whether removable components (e.g., roller mop 120, scraping structure 130, etc.) are still installed. When these components are installed in the self-propelled cleaning device 10, the self-propelled cleaning device 10 can operate normally. When these components are not installed in the self-propelled cleaning device 10, a prompt can be issued, indicating that the self-propelled cleaning device 10 is in standby mode.

[0227] In some examples, the in-situ detection device may be, but is not limited to, the base 200, the roller support 110 of the roller assembly 100, etc.

[0228] In the above detailed description, reference has been made to the accompanying drawings, which illustrate specific aspects of this disclosure by way of illustration. In this regard, terms indicating direction or positional relationship, such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential,” are used with reference to the orientation of the described figures. Since components of the described device can be positioned in multiple different orientations, directional terms are used for illustrative purposes and not for limitation. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concept of this disclosure. Therefore, the following detailed description should not be considered limiting.

[0229] It should be understood that, unless otherwise expressly specified and limited, the terms "joining," "attaching," "installing," "connecting," "linking," "fixing," etc., used in the embodiments of this disclosure should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms herein based on the specific circumstances.

[0230] Furthermore, the term "above" as used herein with respect to components, elements, or material layers formed or located "above" a surface may be used to indicate that the component, element, or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are arranged between the surface and the component, element, or material layer. However, the term "above" as used with respect to components, elements, or material layers formed or located "above" a surface may also optionally have a specific meaning: that the component, element, or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, for example, in direct contact with the surface.

[0231] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section. Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature. In the description herein, “a plurality” means at least two, such as two, three, etc., unless otherwise explicitly specified.

Claims

1. A roller assembly (100) applied to a self-propelled cleaning device (10), characterized in that, include: A roller mop (120) is rotatably configured, and the axial direction of the roller mop (120) is parallel to the plane of the base (200) of the self-moving cleaning device (10); A roller support (110) is provided, which covers the roller mop (120) and partially covers the roller mop (120). The roller mop (120) is at least partially located in a receiving cavity (110a) of the roller support (110). The roller support (110) is provided with spray holes (110b) for supplying liquid to the roller mop (120). A scraping structure (130) is connected to the roller bracket (110). The scraping structure (130) is partially located in the receiving cavity (110a). The scraping structure (130) has a scraper (131) on its surface facing the roller mop (120). Along the traveling direction of the self-moving cleaning device (10), the scraper (131) is positioned facing the roller mop (120), and the scraper (131) and the roller mop (120) are in interference contact. The interference fit between the scraper (131) and the roller mop (120) is greater than or equal to 1.8 mm and less than or equal to 2.5 mm. The interference fit is negatively correlated with the moisture content of the roller mop (120).

2. The roller assembly (100) according to claim 1, characterized in that, The scraping structure (130) is provided with a dirt collection groove (132), which is used to collect the dirt scraped off by the scraper (131) from the roller mop (120); the dirt collection groove (132) and the scraper (131) are an integral structure. The scraping structure (130) is also provided with a filter port (130a), which is located close to the scraper (131) and is connected to the dirt collection tank (132).

3. The roller assembly (100) according to claim 2, characterized in that, The filter port (130a) is disposed on the surface of the scraping structure (130) facing the roller mop (120), and the scraper (131) protrudes from the surface of the scraping structure (130) facing the roller mop (120). Along the height direction of the self-moving cleaning device (10), the height of the scraper (131) is less than or equal to the height of the lower end face of the filter port (130a).

4. The roller assembly (100) according to claim 2, characterized in that, The scraping structure (130) also includes a filter element, and the sludge collection tank (132) is detachably connected to the scraper (131); The filter element is located inside the sludge collection tank (132) and is detachably connected to the sludge collection tank (132). The filter element is provided with the filter port (130a).

5. The roller assembly (100) according to claim 2, characterized in that, The scraping structure (130) is provided with a drain outlet (130b) for communicating with the wastewater tank (230) of the self-moving cleaning device (10), and the drain outlet (130b) is used to connect the sludge collection tank (132) and the wastewater tank (230). Alternatively, the roller assembly (100) may further include a liquid distribution assembly (160), which is connected to the water spray hole (110b) and is an integral structure with the roller support (110); or, the liquid distribution assembly (160) may be detachably connected to the roller support (110).

6. The roller assembly (100) according to claim 1, characterized in that, The interference fit is selected based on the cleaning mode requirements of the self-moving cleaning device (10): When the self-moving cleaning device (10) is in standard mopping mode, the interference fit is less than 2mm; When the self-moving cleaning device (10) is required to be in the powerful squeezing mode, the interference fit is greater than or equal to 2 mm.

7. The roller assembly (100) according to claim 1, characterized in that, The moisture content of the roller mop (120) is configured by at least one of the following parameters: The length of the flocking layer of the roller mop (120), the hardness of the contact portion of the scraper (131) used to make interference contact with the roller mop (120), the operating speed of the roller mop (120), and the water retention rate of the roller mop (120). The length of the flocking layer is positively correlated with the moisture content of the roller mop (120); The hardness of the contact portion is negatively correlated with the moisture content of the roller mop (120); The operating speed is negatively correlated with the moisture content of the roller mop (120); The water retention rate is positively correlated with the moisture content of the roller mop (120).

8. The roller assembly (100) according to claim 1, characterized in that, It also includes a clamping structure (140) that abuts against the scraping structure (130) for applying a preload force toward the scraper strip (131) toward the roller mop (120) so that the interference is maintained in the range of greater than or equal to 1.8 mm and less than or equal to 2.5 mm.

9. A self-propelled cleaning device (10), characterized in that, include: The roller assembly (100) according to any one of claims 1 to 8 above. A base (200) is provided with a receiving cavity (200a) for receiving the roller assembly (100) along the axial direction of the roller mop (120). The receiving cavity (200a) has a cleaning port (200b) on the side facing the surface to be cleaned. The cleaning port (200b) is used for the roller mop (120) to contact the surface to be cleaned. At least one end of the receiving cavity (200a) along the axial direction of the roller mop (120) is provided with an opening (200c). An outward displacement assembly is provided, at least for driving at least a portion of the roller assembly (100) to extend from the opening (200c) out of the base (200), the roller assembly (100) having an outwardly expanding position and an inwardly retracted position; when the roller assembly (100) is in the outwardly expanding position, at least a portion of the roller assembly (100) can extend out of the base (200), a portion of the roller assembly (100) is located in a receiving cavity (200a) of the base (200), and another portion of the roller assembly (100) extends beyond the outside of the base (200); when the roller assembly (100) is in the inwardly retracted position, along the axial direction of the roller mop (120), the portion of the roller assembly (100) located in the receiving cavity (200a) is larger than the portion of the roller assembly (100) located in the receiving cavity (200a) when the roller assembly (100) is in the outwardly expanding position.

10. A self-propelled cleaning device (10), characterized in that, Its features include: The roller assembly (100) according to any one of claims 1 to 8 above. A base (200) is provided with a receiving cavity (200a) for receiving the roller assembly (100) along the axial direction of the roller mop (120). The receiving cavity (200a) has a cleaning port (200b) on the side facing the surface to be cleaned. The cleaning port (200b) is used for the roller mop (120) to contact the surface to be cleaned. A lifting displacement assembly is provided, at least for driving the roller assembly (100) to rise or fall along the height direction of the base (200), wherein the roller assembly (100) falls so that the roller mop (120) contacts the surface to be cleaned, and the roller assembly (100) rises so that the roller mop (120) has a gap with the surface to be cleaned.

11. A self-propelled cleaning device (10), characterized in that, Its features include: The roller assembly (100) according to any one of claims 1 to 8 above. A base (200) is provided with a receiving cavity (200a) for receiving the roller assembly (100) along the axial direction of the roller mop (120). The receiving cavity (200a) has a cleaning port (200b) on the side facing the surface to be cleaned. The cleaning port (200b) is used for the roller mop (120) to contact the surface to be cleaned. A roller cover (150) covers at least a portion of the outer periphery of the roller mop (120), and along the axial direction of the roller mop (120), one end of the roller cover (150) is rotatably connected to the end of the roller assembly (100), and the other end of the roller cover (150) is slidably connected to the roller assembly (100) along the circumference of the roller mop (120), so that the roller cover (150) can be flipped down or up to have a blocking position and a clearance position; A drive mechanism is disposed on the base (200) or the roller assembly (100), the drive mechanism being at least used to provide a power source for raising or lowering the roller assembly (100) and for flipping the roller cover (150) downward or upward, so that the roller assembly (100) has a raised position and a lowered position; When the roller assembly (100) is in the raised position, the roller cover (150) is in the blocking position, and a portion of the roller cover (150) is located between the roller mop (120) and the surface to be cleaned, with a gap between the roller mop (120) and the surface to be cleaned; when the roller assembly (100) is in the lowered position, the roller cover (150) is in the avoidance position, and the roller cover (150) is detached from the roller mop (120) between the surface to be cleaned, with the roller mop (120) in contact with the surface to be cleaned.

12. The self-moving cleaning device (10) according to claim 11, characterized in that, When the roller cover (150) is in the avoidance position along the travel direction of the self-moving cleaning device (10), the roller cover (150) and the scraping structure (130) are respectively located on both sides of the center of the roller mop (120).

13. The self-moving cleaning device (10) according to claim 9, 10, or 11, characterized in that, It also includes a wastewater tank (230), which is located behind the base (200) along the travel direction of the self-propelled cleaning device (10), and the scraping structure (130) is located on the side of the roller mop (120) close to the wastewater tank (230); or, the scraping structure (130) is located on the side of the roller mop (120) away from the wastewater tank (230). The scraping structure (130) is provided with a drain port (130b), and the scraping structure (130) is connected to the sewage tank (230) through the drain port (130b) so that the sewage in the scraping structure (130) can enter the sewage tank (230).

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