A stable surface cleaning device

Abstract

This application discloses a surface cleaning device with stable operation, including a floor brush and a cleaning assembly detachably mounted on the floor brush. The cleaning assembly includes a first roller and a second roller arranged in parallel, a support frame, a side plate, and a cleaning cloth. The support frame includes a first mounting frame arranged along the axial direction of the first roller and a second mounting frame arranged along the axial direction of the second roller. The first mounting frame includes a first support portion and a second support portion arranged opposite to each other, and the second mounting frame includes a third support portion and a fourth support portion arranged opposite to each other. The cleaning cloth at least partially covers the first mounting frame and the second mounting frame. The first mounting frame and the second mounting frame are at least partially offset in the axial direction of the cleaning assembly, so that the first mounting frame at least partially corresponds to the second roller. This technical solution can ensure the cleaning area while avoiding the twisting of the cleaning cloth, ensuring the stability of the cleaning assembly operation and improving cleaning efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning equipment, in particular to a surface cleaning device. BACKGROUND

[0002] At present, surface cleaning devices are widely used in people's daily life, bringing convenience to people's daily cleaning work and improving people's living experience. The existing surface cleaning device usually has a floor brush with a cleaning assembly. The floor brush moves on the surface to be cleaned to wipe the surface to be cleaned with the cleaning assembly to achieve the cleaning purpose. The cleaning assembly composed of two parallel brush rollers and a track-type cleaning cloth sleeved on the brush roller has the characteristics of large cleaning area and high cleaning efficiency. The brush roller rotates to drive the cleaning cloth to rotate and wipe the surface to be cleaned, so as to realize the cleaning purpose by adsorbing dirt to the track-type cleaning cloth or the sewage tank of the surface cleaning device. The two brush rollers are installed on the support frame through the mounting part. In the axial direction of the brush roller, there are some areas where the brush roller is in contact with the cleaning cloth, and some areas where the mounting frame is in contact with the cleaning cloth. The brush roller rotates to drive the cleaning cloth to rotate, and the mounting frame is a fixed support. When the cleaning cloth rotates, the contact surface of the cleaning cloth has sliding friction that hinders the rotation of the cleaning cloth. The mounting frame not only cannot provide power for the rotation of the cleaning cloth, but also provides greater resistance for the rotation of the cleaning cloth compared with the brush roller, resulting in uneven axial stress when the surface cleaning device is running, and the cleaning cloth is prone to twisting. The cleaning assembly may not be able to fit the surface to be cleaned, and the operation is unstable, which affects the cleaning efficiency. If the corresponding position of the mounting frame is not covered by the cleaning cloth, the width of the cleaning cloth will be shortened, the cleaning area of the surface cleaning device will be reduced, and the cleaning efficiency will be affected. SUMMARY

[0003] In order to solve the above-mentioned shortcomings and deficiencies in the prior art, the present application provides a surface cleaning device with stable operation, which comprises a floor brush and a cleaning assembly detachably mounted on the floor brush. The cleaning assembly comprises a first roller and a second roller arranged in parallel, a support frame, a side plate and a cleaning cloth. The support frame comprises a first mounting frame arranged in the axial direction of the first roller and a second mounting frame arranged in the axial direction of the second roller. The first mounting frame comprises a first support part and a second support part arranged oppositely, and the second mounting frame comprises a third support part and a fourth support part arranged oppositely. The cleaning cloth at least partially covers the first mounting frame and the second mounting frame. The first mounting frame and the second mounting frame are at least partially arranged in a staggered manner in the axial direction of the cleaning assembly, so that the first mounting frame at least partially corresponds to the second roller.

[0004] Preferably, the first roller comprises a driving section and a transmission section, and the first support part is arranged between the driving section and the transmission section. The first support part is at least partially provided with the second roller at a corresponding position in the direction parallel to the side plate.

[0005] Preferably, the first support portion is disposed at the end of the first roller, and the second support portion is disposed at the end of the second roller corresponding to the first support portion, and the first support portion and the fourth support portion are at least partially offset in the axial direction of the cleaning assembly.

[0006] Preferably, the second support and the third support are disposed on the side plate, one end of the first roller is rotatably connected to the second support, and the other end is connected to the drive assembly, and the width of the second support along the direction of the cleaning assembly is smaller than the width of the third support along the direction of the cleaning assembly.

[0007] Preferably, the rotation of the first roller drives the cleaning cloth to rotate, and the second roller rotates under the influence of the rotating cleaning cloth. The effective rotation length of the first roller is greater than the effective rotation length of the second roller.

[0008] Preferably, the length of the drive section is shorter than the length of the transmission section.

[0009] Preferably, the diameter of the drive section is equal to the diameter of the transmission section, and the diameter of the first support section is less than or equal to the diameter of the drive section.

[0010] Preferably, the first support part is a ring with a through hole in the center, and a connecting part is sleeved inside the first support part. One end of the connecting part is connected to the drive section, and the other end is connected to the transmission section.

[0011] Preferably, at least one of the second support portion and the third support portion has a diameter smaller than that of the first roller or the second roller that is coaxially arranged therewith.

[0012] Preferably, the floor brush is provided with a scraper that abuts against the cleaning cloth, and the first support part is provided with a rib that abuts against the cleaning cloth at a position corresponding to the scraper.

[0013] By adopting the above technical solution, the present invention has the following advantages:

[0014] 1. During operation of the surface cleaning device, the first and second rollers abut against the cleaning cloth, causing the cleaning cloth to rotate. The first and second mounting frames are respectively located axially on the first and second rollers. The cleaning cloth is sleeved on the support frame and at least partially covers the first and second mounting frames, thereby expanding the lateral width of the cleaning cloth and increasing the cleaning area of ​​the cleaning assembly. The first and second mounting frames are fixed support frames rotatably connected to the first and second rollers, but do not rotate with the first and second rollers. When the first and second mounting frames abut against the cleaning cloth, the positions of the cleaning cloth corresponding to the first and second mounting frames are subjected to frictional forces that hinder the rotation of the cleaning cloth. The positions of the first and second rollers corresponding to the cleaning cloth are subjected to rolling friction. Under the same conditions, sliding friction is greater than rolling friction. Therefore, the area of ​​the cleaning cloth corresponding to the mounting frame has greater rotational resistance when rotating, and the cleaning cloth is subjected to uneven force along the rotation axis of the first and second rollers. The tension at the positions of the first and second mounting frames corresponding to the cleaning cloth is less than the tension at other positions of the cleaning cloth axially. Therefore, the first and second mounting brackets, at their corresponding positions with the cleaning cloth, require greater tension or to overcome less resistance to mitigate the uneven axial force on the cleaning cloth and ensure it maintains a uniform linear velocity. Consequently, the first and second mounting brackets cannot be perfectly aligned axially along the direction of rotation of the cleaning cloth; otherwise, the resistance experienced by the cleaning cloth at the corresponding positions of the first and second mounting brackets would be significantly greater than at other positions, causing the cleaning cloth to twist.

[0015] If there are gaps between at least part of the first and second mounting brackets and the cleaning cloth, a non-aggressive clearance area is provided between the mounting brackets and the cleaning cloth. However, this area cannot provide support for the cleaning cloth. If the first and second mounting brackets are positioned opposite each other, the cleaning cloth at the opposite position will lack sufficient support, resulting in insufficient pressure on the surface to be cleaned and affecting the wiping effect. On the other hand, if the gap between the first and second mounting brackets is too large, dirt may enter between the mounting brackets and the cleaning cloth, causing cleaning difficulties or jamming of the cleaning component. Thirdly, even if there are gaps between at least part of the first and second mounting brackets and the cleaning cloth, the cleaning component exerts downward pressure on the ground during cleaning. During operation, the cleaning cloth may still abut against the first and second mounting brackets, creating frictional resistance between the cleaning cloth and the mounting brackets during rotation, hindering the rotation of the cleaning cloth.

[0016] By at least partially offsetting the first and second mounting brackets along the axial direction of the cleaning component, even if significant resistance arises between the mounting brackets and the cleaning cloth, the first and second mounting brackets are not completely overlapped along the axial direction of the cleaning component. At least a portion of the mounting brackets along the rotation direction of the cleaning cloth consists of brush rollers with lower resistance. This reduces the impact of the support frame on the frictional resistance between the cleaning cloth and the cloth's rotation, decreasing the possibility of cloth twisting and ensuring stable operation of the surface cleaning device. Conversely, when the first and second mounting brackets are at least partially offset from the cleaning cloth, their offset positions along the axial direction of the cleaning component are staggered, ensuring the cleaning cloth remains taut on the support frame and guaranteeing cleaning efficiency. Attached Figure Description

[0017] Figure 1 This is an overall diagram of the surface cleaning device in Embodiment 1;

[0018] Figure 2 This is a structural diagram of the floor brush in the surface cleaning device of Embodiment 1;

[0019] Figure 3 This is a schematic diagram of the cleaning component part in the surface cleaning device of Embodiment 1;

[0020] Figure 4 This is a partial disassembly diagram of the floor brush in the surface cleaning device of Embodiment 1;

[0021] Figure 5 This is a schematic diagram of the cleaning components in the surface cleaning device of Embodiment 1;

[0022] Figure 6 This is an exploded view of some components of the cleaning assembly in the surface cleaning device of Embodiment 1;

[0023] Figure 7 This is a partial structural diagram of the cleaning components in the surface cleaning device of Embodiment 1;

[0024] Figure 8 This is a schematic diagram of the main support portion of the surface cleaning device in Embodiment 1;

[0025] Figure 9 This is a schematic diagram of the open end of the first support portion in the surface cleaning device of Embodiment 1;

[0026] Figure 10 This is a schematic diagram of the semi-closed end of the first support portion in the surface cleaning device of Embodiment 1;

[0027] Figure 11 This is a schematic diagram of the cooperative structure of the drive section and transmission section in the surface cleaning device of Embodiment 1;

[0028] Figure 12 This is a schematic diagram of the cleaning component in the surface cleaning device of Example 2;

[0029] Figure 13 This is a schematic diagram of the cleaning component structure in the surface cleaning device of Embodiment 3;

[0030] Figure 14 This is a schematic diagram of another cleaning component in the surface cleaning device of Embodiment 3.

[0031] In the diagram, 100-floor brush, 200-cleaning assembly, 300-liquid supply tank, 400-sewage tank, 410-sewage suction channel, 210-first roller, 211-accommodating cavity, 212-side plate, 2121-abutting part, 2122-limiting part, 2123-positioning part, 2131-drive head, 214-drive section, 215-transmission section, 216-connecting part, 217-cavity, 220 - Second roller, 230- Support frame, 231- Main support, 232- Secondary support, 233- First support part, 234- Second support part, 235- Third support part, 236- Fourth support part, 240- Cleaning cloth, 2331- Rib, 2332- Bearing, 2162- Hexagonal bevel, 2336- Semi-closed end, 2337- Open end, 237- Second rib, 260- Scraper. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," and "bottom," etc., which indicate orientation or positional relationships, are based solely on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0033] This application provides a surface cleaning device, which can be a handheld surface cleaning device with a tracked cleaning component, or a self-propelled surface cleaning device with a tracked cleaning component. Examples of handheld surface cleaning devices include floor scrubbers, cleaning mops, etc. Examples of self-propelled surface cleaning devices include cleaning robots.

[0034] The surface cleaning device includes a cleaning assembly 200, which includes a support frame 230, a first roller 210 and a second roller 220 mounted on and rotatably connected to the support frame 230, and a cleaning cloth 240 sleeved on the first roller 210 and the second roller 220. Specifically, the cleaning cloth 240 is a tracked cleaning cloth. When the tracked surface cleaning device performs cleaning operations, the cleaning cloth 240 is at least partially in contact with the first roller 210 and the second roller 220 and is in a taut state. The first roller 210 and / or the second roller 220 rotate to drive the cleaning cloth 240 to rotate and wipe the surface to be cleaned.

[0035] Example 1

[0036] like Figures 1-11 As shown, the surface cleaning device also includes a liquid supply assembly, which includes a liquid supply tank 300 for storing cleaning liquid and a liquid supply channel connected at one end to the liquid supply tank 300 and at the other end to the cleaning assembly 200. During the cleaning operation, the liquid supply tank 300 supplies cleaning liquid to the cleaning assembly 200 through the liquid supply channel, wetting the cleaning assembly 200, and the cleaning assembly 200 rotates to wipe the surface to be cleaned.

[0037] Furthermore, the cleaning device may also include a suction assembly, which further includes a suction fan, a suction channel 410, and a wastewater tank 400. One end of the suction channel 410 is connected to the cleaning assembly 200, and the other end is connected to the suction fan via the wastewater tank. When the surface cleaning device is working, the suction fan generates suction force to adsorb dirt on the surface to be cleaned and / or the cleaning assembly 200. The dirt enters the surface cleaning device through the suction channel 410 and is eventually stored in the wastewater tank 400.

[0038] The support frame 230 includes a main support 231 and a secondary support 232. The main support 231 includes a first mounting frame arranged axially along the first roller 210 and a second mounting frame arranged axially along the second roller 220. The first mounting frame includes a first support portion 233 and a second support portion 234 arranged opposite to each other, and the second mounting frame includes a third support portion 235 and a fourth support portion 236 arranged opposite to each other. The support frame 230 also includes a side plate 212, which is fixedly connected to or integrally formed with the main support 231 and / or the secondary support 232. A cleaning cloth 240 is sleeved on the support frame 230 and at least partially covers the first and second mounting frames to increase the lateral width of the cleaning cloth 240 and improve the cleaning area of ​​the cleaning assembly 200. When the first and second mounting frames come into contact with the cleaning cloth 240 during rotation, frictional resistance is generated at the points where they impede the rotation of the cleaning cloth.

[0039] Optionally, the support frame 230 is also equipped with a tensioning structure. When the tensioning structure contracts, the main support 231 and the secondary support 232 move closer to each other, or the secondary support 232 moves closer to the main support 231, or the main support 231 moves closer to the secondary support 232. A gap appears between the first roller 210, the second roller 220 and the cleaning cloth 240, and the cleaning cloth 240 is in a relaxed state, allowing the user to remove the cleaning cloth 240 from the support frame 230 for replacement or cleaning. When the tensioning structure is in a taut state, the main support 231 and the secondary support 232 maintain a fixed distance and are fixed in corresponding positions. The cleaning cloth 240 is fitted onto the first roller 210 and the second roller 220, at least partially abutting against the first roller 210 and the second roller 220, maintaining a taut state. The cleaning cloth 240 rotates under the drive of the first roller 210 and / or the second roller 220 to clean the surface to be cleaned.

[0040] Furthermore, the cleaning cloth 240 is sleeved on the first roller 210 and the second roller 220, and the axial length of the cleaning cloth 240 is greater than or equal to the axial length of the first roller 210 and the second roller 220. Optionally, the axial length of the cleaning cloth 240 is greater than the axial length of the first roller 210 and the second roller 220. The cleaning cloth 240 completely covers the first roller 210 and the second roller 220, and the contact area between the cleaning cloth 240 and the first roller 210 and the second roller 220 is large, which allows for sufficient friction with the first roller 210 and the second roller 220, and it rotates under the drive of the first roller 210. At the same time, the first roller 210 and the second roller 220, which abut against the cleaning cloth 240, provide downward pressure for the cleaning cloth 240 to wipe the surface to be cleaned, so that the cleaning cloth 240 makes full contact with the surface to be cleaned, thereby improving cleaning efficiency. The cleaning cloth 240 covers at least a portion of the first mounting frame and the second mounting frame to increase the lateral width of the cleaning cloth 240, expand the cleaning area, and improve cleaning efficiency.

[0041] Furthermore, the first mounting bracket and the second mounting bracket are at least partially offset in the axial direction of the cleaning assembly 200. The axial direction of the cleaning assembly 200 refers to the direction parallel to the first roller and / or the second roller. The at least partial offset in the axial direction of the first mounting bracket and the second mounting bracket means that their projections on a plane parallel to the first roller and / or the second roller do not completely coincide. During cleaning operations, the first roller 210, the second roller 220, and the support frame 230 collectively support the cleaning cloth 240, keeping the cleaning cloth 240 taut and causing it to rotate and wipe the surface to be cleaned as the first roller 210 rotates. Rolling friction occurs between the first roller 210 and the second roller 220 and the cleaning cloth 240. Optionally, the cleaning cloth 240 may at least partially abut against the first mounting bracket and the second mounting bracket to keep the cleaning cloth 240 taut under the support of the first mounting bracket and the second mounting bracket. Optionally, the cleaning cloth 240 can also be disposed in a way that avoids gaps between it and the first and second mounting brackets, that is, the tensioned cleaning cloth 240 abuts against the first and second mounting brackets with gaps between them, so as to reduce the frictional resistance between the cleaning cloth 240 and the support frame 230.

[0042] As one embodiment of this invention, optionally, the rotation of the first roller 210 drives the cleaning cloth 240 to rotate, and the rotation of the cleaning cloth 240 drives the second roller 220 to rotate, which will be described as an example. In this embodiment, the cleaning cloth 240 at least partially abuts against the first mounting frame and the second mounting frame.

[0043] The first roller 210 abuts against the cleaning cloth 240 and drives the cleaning cloth 240 to rotate. The first support portion 233 and the second support portion 234 on the first mounting frame are arranged axially on the first roller 210, forming sliding friction with the cleaning cloth 240. During the rotation of the first roller 210, which drives the cleaning cloth 240 to rotate, the corresponding positions of the first support portion 233 and the second support portion 234 with the cleaning cloth 240 are subjected to frictional resistance between the first support portion 233, the second support portion 234 and the cleaning cloth 240. Therefore, the cleaning cloth 240 is subjected to uneven force in the direction of the rotation axis of the first roller 210. The tension of the first roller 210 on the corresponding position of the first mounting frame and the cleaning cloth 240 is less than the tension on other positions of the cleaning cloth 240 in the axial direction. Similarly, the rotating cleaning cloth 240 drives the second roller 220 to rotate. Friction occurs between the cleaning cloth 240 and the second roller 220, and sliding friction is formed between the cleaning cloth 240 and the second mounting frame. Under the same conditions, the friction between the second support frame and the cleaning cloth is greater than the friction between the second roller 220 and the cleaning cloth. Therefore, a greater pulling force is required at the corresponding position of the second mounting frame and the cleaning cloth 240 to ensure uniform axial force on the cleaning cloth 240. Otherwise, if the frictional resistance between the cleaning cloth 240 and the corresponding position of the second mounting frame is high, the insufficient pulling force provided by the first roller 210 to the cleaning cloth 240 will prevent the cleaning cloth 240 from overcoming the frictional resistance at the corresponding position of the second mounting frame, resulting in different linear velocities of the cleaning cloth 240 in the axial direction, causing the cleaning cloth 240 to twist and reducing cleaning efficiency. Therefore, the first mounting frame and the second mounting frame are at least partially misaligned in the axial direction of the cleaning assembly 200. That is, sliding friction with greater friction occurs between the second mounting frame and the cleaning cloth 240, and the corresponding position of the second mounting frame at the first roller 210 in the direction parallel to the side plate 212 is the first roller 210. The first roller 210 rotates against the rolling friction with the cleaning cloth 240, causing the cleaning cloth 240 to rotate. Tensile loss is minimal, therefore, the tension obtained at the corresponding location of the second mounting bracket is greater, sufficient to cause the cleaning cloth 240 to rotate against the friction with the second mounting bracket, alleviating the uneven force on the cleaning cloth 240 along the axial direction of the second roller 220 and reducing the possibility of the cleaning cloth 240 twisting. Similarly, sliding friction occurs between the first mounting bracket and the cleaning cloth 240, and the tension generated at the corresponding location of the cleaning assembly 200 on the first mounting bracket is less than the tension generated on the first roller 210. The first and second mounting brackets are at least partially offset along the axial direction of the cleaning assembly 200, meaning at least a portion of the first mounting bracket is positioned along the direction parallel to the side plate 212 as the second roller 220 in rolling contact with the cleaning cloth 240. The second roller 220 rotates against the rolling friction with the cleaning cloth 240. Under the same conditions, rolling friction is less than sliding friction. Therefore, the resistance overcome by the rotation of the cleaning cloth 240 and the rotation of the second roller 220 is small, and the required pulling force is small.Therefore, even if a large sliding friction needs to be overcome between the first mounting bracket and the cleaning cloth 240, and the provided tension is relatively small, it is still possible to drive the cleaning cloth 240 to rotate, and cause the second roller 220 to rotate under the drive of the cleaning cloth 240. Thus, for the corresponding positions of the first mounting bracket and the cleaning cloth 240 that provide relatively small tension, at least part of them are the second roller 220 and the cleaning cloth 240, which have relatively low resistance. When a larger tension is required to make the cleaning cloth 240 overcome the friction between itself and the second mounting bracket, the corresponding position of the second mounting bracket along the rotation direction of the cleaning cloth 240 is at least partly the first roller 210, and the rotation of the first roller 210 provides tension for the rotation of the cleaning cloth 240. There is rolling friction between the first roller 210 and the cleaning cloth 240, and the cleaning cloth 240 rotates overcoming frictional resistance. Under the same conditions, rolling friction is less than sliding friction. Therefore, a larger tension can be provided for the corresponding position of the second mounting bracket, enabling the cleaning cloth 240 to overcome sliding friction and rotate at the corresponding position of the second mounting bracket. This invention addresses the problem of uneven axial force on the cleaning cloth 240 and cleaning component 200, as well as the issue of inconsistent linear velocity at different positions of the cleaning cloth 240, leading to torsion of the cleaning cloth 240.

[0044] Conversely, if the first and second mounting brackets are perfectly aligned axially in the cleaning assembly 200, the cleaning cloth 240 will experience severely uneven axial force. This can cause the cleaning cloth 240 to twist during rotation, leading to unstable operation of the cleaning assembly 200 and preventing the cleaning cloth 240 from fully adhering to the surface to be cleaned, thus reducing cleaning efficiency. Specifically, the rotation of the first roller 210 drives the cleaning cloth 240 to rotate, generating rolling friction between the first roller 210 and the cleaning cloth 240 that hinders its movement. When the cleaning cloth 240 rotates, the tension at the corresponding position of the first mounting bracket is less than the tension at the corresponding position of the first roller 210 and the cleaning cloth 240. Furthermore, the rotation of the cleaning cloth 240 drives the second roller 220 to rotate. The tension provided by the first roller 210 pulls the cleaning cloth 240 to overcome the friction between the second roller 220 and the cleaning cloth 240, driving the second roller 220 to rotate. A second bracket also exists on the axis of the second roller 220, resulting in sliding friction between the rotating cleaning cloth 240 and the second bracket. Under the same conditions, sliding friction is greater than rolling friction. Therefore, to ensure that the cleaning cloth 240 has the same linear velocity along the axis, the second bracket corresponding to the cleaning cloth 240 requires greater tension. Otherwise, uneven force on the cleaning cloth 240 in the axial direction will cause it to twist. However, if the first mounting bracket is positioned axially corresponding to the cleaning assembly 200, the tension provided by the first mounting bracket corresponding to the cleaning cloth 240 on the axis where the first roller 210 provides tension for the rotation of the cleaning cloth 240 is located is less than that at other positions on the axis. The position of the cleaning cloth 240 that needs to be pulled is the second mounting bracket, which requires a larger tension to overcome the friction between the second mounting bracket and the cleaning cloth 240 to rotate. Therefore, the cleaning cloth 240 experiences uneven force in the axial direction of the cleaning assembly 200, making it prone to twisting. This causes the cleaning assembly 200 to fail to adhere to the surface to be cleaned, resulting in unstable operation and reduced cleaning efficiency.

[0045] Therefore, the first mounting bracket and the second mounting bracket are at least partially offset along the axial direction of the cleaning assembly 200. That is, at least partially, the positions where sliding friction occurs with the cleaning cloth 240 do not generate rolling friction with the cleaning cloth at corresponding positions along the axial direction of the cleaning assembly 200, so as to reduce the uneven force on the cleaning cloth 240 along the axial direction of the cleaning assembly 200 and minimize the possibility of the cleaning cloth 240 twisting.

[0046] Furthermore, the rotational length L of the first roller 210 主 The rotation length L is greater than that of the second roller 220. 从The rotation length here refers to the length of the brush roller that can rotate under the drive of the drive component, cleaning cloth, or other drive source. As an optional implementation in this embodiment, the projection of the first roller 210 on the axis l of the cleaning component 200 overlaps the projection of the second roller 220 on the axis l of the cleaning component. The axis l of the cleaning component 200 refers to the straight line containing the rotation axis of the cleaning cloth 240 when it is sleeved on the support frame 230 and kept taut. Optionally, the axis l of the cleaning component can also be expressed as a straight line parallel to the first roller 210 and the second roller, located between the first roller 210 and the second roller 220, making the first roller 210 and the second roller 220 symmetrical. This ensures that the second roller 220 has a corresponding position of the first roller 210 rotating in the rotation direction of the cleaning cloth 240. The first roller 210 provides sufficient driving force for the rotation of the cleaning cloth 240, ensuring that the cleaning cloth 240 and the second roller 220 rotate stably under the drive of the first roller 210, and preventing the second roller 220 from failing to rotate synchronously with the first roller 210, causing unstable operation.

[0047] Optionally, there is at least a gap between the first mounting bracket and the second mounting bracket and the cleaning cloth 240, that is, there is a clearance area between the first mounting bracket and / or the second mounting bracket and the cleaning cloth 240 that does not come into contact with the cleaning cloth 240.

[0048] Furthermore, as one implementation method in this embodiment, optionally, when the cleaning component 200 wipes the surface to be cleaned, the pressure of the cleaning component 200 on the ground increases, and part of the clearance area disappears. The first mounting bracket and / or the second mounting bracket, which originally had a gap with the cleaning cloth 240, abuts against the cleaning cloth 240. The first mounting bracket and / or the second mounting bracket still generate frictional resistance between themselves and the surface of the cleaning cloth 240, hindering the rotation of the cleaning cloth 240. Because the first mounting bracket and the second mounting bracket are at least partially misaligned in the axial direction of the cleaning component 200, the principle is the same as described above, and will not be repeated here. Optionally, when the cleaning component 200 wipes the surface to be cleaned, there is at least a gap between the first mounting bracket and the second mounting bracket and the cleaning cloth 240, that is, there is a partial clearance area between the first mounting bracket and / or the second mounting bracket and the cleaning cloth 240. This creates a region between the fixed mounting bracket and the rotating cleaning cloth 240, reducing the frictional resistance between the first mounting bracket and the second mounting bracket and the cleaning cloth 240, and preventing the cleaning cloth 240 from twisting due to uneven axial force during rotation. However, the first and second mounting brackets, which have gaps with the cleaning cloth 240, cannot provide sufficient support to keep the cleaning cloth 240 taut. When the cleaning cloth 240 wipes the surface to be cleaned, the cleaning part 240 floats slightly in the clearance area, affecting the cleaning effect. If the first and second mounting brackets are arranged opposite each other, the support force of the first and second mounting brackets in the direction perpendicular to the axis of the cleaning assembly 200 is insufficient, and the cleaning cloth 240 covering the outer surface of the first and second mounting brackets cannot fully adhere to the surface to be cleaned, affecting the wiping effect. On the other hand, if the gap between the first and second mounting brackets is too large, dirt may enter between the mounting brackets and the cleaning cloth, causing difficulties in cleaning the cleaning assembly or jamming of the cleaning assembly. Third, even if there is at least a gap between the first and second mounting brackets and the cleaning cloth 240, the cleaning component 200 exerts downward pressure on the ground during the cleaning process. During operation, the cleaning cloth 240 may still come into contact with the first and second mounting brackets, causing frictional resistance between the cleaning cloth 240 and the mounting brackets during rotation, thus hindering the rotation of the cleaning cloth 240.

[0049] As another embodiment of this invention, optionally, the first roller 210 and the second roller 220 rotate together to drive the cleaning cloth 240 to rotate, and the first roller 210 is driven to rotate by the rotation of the cleaning cloth 240. In this transmission method, the first mounting bracket and the second mounting bracket are at least partially misaligned in the axial direction of the cleaning assembly 200. The principle is the same as the above scheme, and will not be described again here.

[0050] The first roller 210 includes a drive section 214 and a transmission section 215 located on the same axis. A first support portion 233 is provided on the support frame 230, positioned between the drive section 214 and the transmission section 215. This divides the first roller 210 into two segments, the drive section 214 and the transmission section 215, both with axial lengths shorter than the first roller 210. The first support portion 233 does not provide driving force for the rotation of the cleaning cloth 240. While the drive sections 214 and transmission sections 215 on either side of the first support portion 233 rotate, they simultaneously drive the corresponding cleaning cloth 240 to rotate, and also drive the cleaning cloth 240 located at the corresponding position on the first support portion 233 in the middle to rotate. Compared to the case where the support portion is located at the end of the first roller, the first support portion 233 is positioned between the drive section 214 and the transmission section 215, ensuring that the linear rotational speed of the cleaning cloth 240 along the axial direction of the first roller is approximately the same, reducing the possibility of twisting of the cleaning cloth 240 and ensuring stable operation of the cleaning assembly. Figure 12 As shown, the first support portion 233 is at least partially provided with the second roller 220 at a position corresponding to the rotation direction of the cleaning cloth 240, so that the first support portion 233 and the third support portion 235 or the fourth support portion 236 provided in the axial direction of the cleaning assembly 200 do not completely overlap, further reducing the rotational resistance of the cleaning cloth 240 at the position corresponding to the first support portion 233, preventing the cleaning cloth 240 from twisting, and ensuring the stable operation of the cleaning assembly 200. Optionally, the third support portion 235 and the fourth support portion 236 are located at both ends of the second roller 220, respectively. One end of the first roller 210 is rotatably connected to the second support portion 234, and the other end is detachably installed with the floor brush 200. The first support portion 233 is located between the drive section 214 and the transmission section 215 of the first roller 210.

[0051] Furthermore, the cleaning component 200 is detachably connected to the floor brush 100. One end of the drive section 214 is movably connected to the drive component on the floor brush 100, and the other end is connected to the first support 233. When the user removes the cleaning component 200 from the floor brush 100, one end of the drive section 214 separates from the drive component. The cleaning cloth 240 is in a taut state after being sleeved outside the first roller 210 and the second roller 220, so that the taut cleaning cloth 240 can fully rub against the surface to be cleaned and wipe away dirt. Therefore, when the cleaning component 200 is removed from the floor brush 100, one end of the drive section 214 is in a suspended state. The taut cleaning cloth 240 generates a force on the first roller 210 and the second roller 220, causing them to move towards the support frame 230. The drive section 214, with one end suspended, is prone to deformation under the action of external force. If the axial length of the drive section 214 is relatively long, it forms a single cantilever with poor bending resistance. Under the tension of the cleaning cloth 240, it is prone to deformation and bending towards the support frame 230. This causes the cleaning assembly 200 to fail to coordinate the first roller 210, the second roller 220, and the support frame 230 to keep the cleaning cloth 240 taut. The first roller 210, bending towards the support frame 230, will create a gap with the cleaning cloth 240. On the one hand, the rotation of the first roller 210 cannot drive the cleaning cloth 240 to rotate and wipe the surface to be cleaned. On the other hand, the untaut cleaning cloth 240 is at least partially slack. Even if the deformation of the first roller 210 is small enough to drive the cleaning cloth 240 to rotate to a certain extent, the partial slack of the cleaning cloth 240 reduces its dirt adsorption capacity and cleaning efficiency. Meanwhile, if the first roller 210 deforms, it may cause interference at the point where it mates with the drive assembly, preventing stable engagement between them. During the rotation of the first roller 210 by the drive assembly, interference with the first roller 210 could affect transmission stability and potentially cause the drive assembly to jam and become unusable. Therefore, a first support portion 233, fixedly connected to the support frame 230, is provided at the other end of the drive section 214 to provide stable support for the suspended drive section 214, improving its strength. On the other hand, dividing the first roller 210 into a drive section 214 and a transmission section 215 reduces the length of the suspended drive section 214 without changing the axial length of the cleaning assembly 200, ensuring stability under the support of the first support portion 233 even with one end suspended, thus extending the service life of the cleaning assembly 200.

[0052] Furthermore, the diameter of the drive section 214 is equal to that of the transmission section 215. With a constant radial diameter, a smaller axial length results in less deformation and less axial deformation amplification when subjected to the lifting force of an uneven surface, thus increasing bending resistance. On the other hand, the first roller 210 is divided into a drive section 214 and a transmission section 215, with a first support portion 233 in between. When the surface cleaning device cleans on an uneven surface, if the drive section 214 deforms due to uneven axial force, the first support portion 233 provides support to the ends of the drive section 214 and the transmission section 215, reducing the possibility that the transmission section 215 will not deform with the drive section 214 or reducing the degree of deformation of the transmission section 215 with the drive section 214. Similarly, if the transmission section 215 deforms due to uneven axial force, the first support portion 233 reduces its impact on the drive section 214. To a certain extent, this reduces the deformation that the cleaning component 200 may experience when subjected to external impact, thus improving the operational stability of the surface cleaning device. On the other hand, when the cleaning component 200 is mounted on the floor brush 100, one end of the first roller 210 is rotatably connected to the side plate 212, and the other end is connected to the drive component, rotating under the action of the drive component. If the first roller 210 undergoes axial deformation, it may cause interference between the first roller 210 and the drive component, affecting transmission stability, or even causing jamming and damage to the drive component. The first support part 233 provides axial support for the first roller 210, which is supported axially by the drive component on the floor brush 100, the first support part 233, and the side plate 212. Compared to the prior art where the first roller only has two points of support (the drive component on the floor brush and the side plate), the three-point support of the first roller 210 increases its strength, enhances its bending resistance under external impact, and results in stronger bending resistance and more stable operation.

[0053] Furthermore, the diameter of the first support portion 233 is less than or equal to the diameter of the first roller 210. When the cleaning cloth 240 is mounted on the support frame 230 in a tensioned state, it at least partially abuts against the first roller 210 and the second roller 220.

[0054] Optionally, the diameter of the first support frame 233 is smaller than the diameter of the first roller 210. The first support 233 is a circular fixed frame. During the rotation of the cleaning cloth 240, friction occurs between it and the first support 233, generating a frictional force on its surface that hinders the rotation of the cleaning cloth 240. This hinders the movement of the cleaning cloth 240, and the uneven force on the cleaning cloth 240 along the axial direction of the first roller 210 makes it prone to twisting, affecting its cleaning effect. By making the diameter of the first support 233 smaller than the diameter of the first roller 210, when the cleaning cloth 240 is installed on the support frame 230 in a tensioned state, a gap exists between the cleaning cloth 240 and the first support 233. This reduces or eliminates the frictional force between the first support 233 and the first roller 210, thereby reducing the resistance when the cleaning cloth 240 rotates and, to some extent, improving the uneven force on the cleaning cloth 240 along the axial direction of the first roller 210 during rotation.

[0055] Furthermore, the floor brush 100 is equipped with a scraper 260 that is interference-fitted with the cleaning cloth 240. The cleaning assembly 200 is mounted on the floor brush 100. When the surface cleaning device performs a cleaning operation, the cleaning cloth 240 rotates and wipes the surface to be cleaned. During the rotation of the cleaning cloth 240, which carries dirt, it is scraped by the scraper 260, which is interference-fitted with the cleaning cloth 240, causing the dirt to fall off and ultimately be collected in the suction assembly. Correspondingly, the first support 233 is equipped with a rib 2331 at a position corresponding to the scraper 260. The cleaning cloth 240, when in a taut state, at least partially abuts against the rib 2331, which provides some support to the cleaning cloth 240. The auxiliary support frame 230, the first roller 210, and the second roller 220 keep the cleaning cloth 240 in a taut state. On the other hand, to reduce the resistance when the cleaning cloth 240 rotates, the diameter of the first support 233 is made smaller than the diameter of the first roller 210, and a gap exists between the first support 233 and the cleaning cloth 240. When the scraper 260 at the corresponding position of the first support 233 scrapes the cleaning cloth 240, the cleaning cloth 240 escapes under force. The gap between the first support 233 and the cleaning cloth 240 provides escape space for the movement of the cleaning cloth 240. Therefore, the cleaning cloth 240 at this position cannot be scraped by the scraper 260 to remove the dirt adhering to it. To ensure the cleaning effect of the scraper 260 on the cleaning cloth 240, ribs 2331 are provided at the corresponding positions of the first support 233 and the scraper 260 to keep the cleaning cloth 240 taut. During the scraping process of the scraper 260, due to the supporting force of the ribs 2331, the cleaning cloth 240 cannot deform and escape the scraping of the scraper 260 even if it is subjected to scraping force. This removes dirt adhering to the cleaning cloth 240, extends the lifespan of the cleaning cloth 240, and improves cleaning efficiency.

[0056] Optionally, the diameter of the first support frame 233 is equal to the diameter of the first roller 210. The cleaning cloth 240 is mounted on the support frame 233 in a tensioned state, abutting against the first roller 210. The diameter of the first support frame 233 is equal to the diameter of the first roller 210, and the first support frame 233 abuts against the cleaning cloth 240. The surface of the first support frame 233 experiences sliding friction with the cleaning cloth 240, preventing the cleaning cloth 240 from rotating. The first support frame 233 is located between the drive section 214 and the transmission section 215. The cleaning cloth 240 corresponding to the first support frame 233 rotates under the drive of the drive section 214 and the transmission section 215. Since rollers that drive the cleaning cloth 240 to rotate are provided at both ends of the first support frame 233, the cleaning cloth 240 at the corresponding position of the first support frame 233 rotates accordingly, reducing the possibility of the cleaning cloth 240 twisting. At the same time, the first support frame 233 keeps the cleaning cloth 240 in a tensioned state, improving cleaning efficiency.

[0057] Furthermore, the cleaning component 200 is mounted on the floor brush 100. The first support portion 233 has support ribs at its bottom near the surface to be cleaned, ensuring the cleaning cloth 240, which is fitted onto the support frame 230, remains taut. The support ribs abut against the cleaning cloth 240, increasing the pressure on the floor when the cloth 240 wipes the surface, ensuring stable contact between the cloth 240 and the floor, and improving cleaning efficiency. On the other hand, the support ribs at the bottom of the first support portion 233 enhance its support strength. When the surface cleaning device operates on uneven surfaces, the first support portion 233 with its support ribs is less prone to deformation under external forces, thus the support ribs enhance strength and buffer external forces.

[0058] The floor brush 100 is also equipped with a drive assembly, which includes a transmission head 2131 mounted on the floor brush 100. When the cleaning assembly 200 is mounted on the floor brush 100, the first roller 210 and / or the second roller 220 are connected to the transmission head 2131. When the surface cleaning device performs a cleaning operation, the transmission head 2131 drives the first roller 210 and / or the second roller 220 to rotate. The rotation of the first roller 210 drives the cleaning cloth 240 to rotate, and the rotating cleaning cloth 240 drives the second roller 220 to rotate.

[0059] As one implementation in this embodiment, optionally, the driving component is connected to the first roller 210. The first roller 210 rotates and drives the cleaning cloth 240 to rotate, and the rotating cleaning cloth 240 drives the second roller 220 to rotate. Further, one end of the driving segment 214 is provided with an inwardly recessed cavity 217. The driving component includes a transmission head 2131 disposed within the receiving cavity 211 and fitted inside the cavity 217 of the driving segment 214. The driving segment 214 and the transmission head 2131 are in a transmission engagement to rotate the driving segment 214, thereby causing the driving segment 214 to rotate under the drive of the driving component. This improves the stability of the transmission and prevents dirt from adhering to the transmission head 2131, causing it to jam and resulting in the failure of the driving component.

[0060] As another implementation in this embodiment, optionally, one end of the drive segment 214 is provided with a protrusion that cooperates with the drive assembly, and the drive assembly is provided with a cavity that cooperates with the drive segment 214. The protrusion on the drive segment 214 extends into the cavity of the drive assembly and is enclosed by the cavity. This allows the drive segment 214 to rotate with the drive assembly, while preventing dirt from entering the gap between the drive segment 214 and the drive assembly, thus ensuring stable transmission.

[0061] Optionally, when the surface cleaning device performs the cleaning operation, the drive component drives the first roller and the second roller to rotate, and the cleaning cloth rotates under the combined drive of the first roller and the second roller.

[0062] As one implementation scheme in this embodiment, optionally, the drive assembly on the floor brush 100 includes a first drive head connected to the first roller 210 and a second drive head connected to the second roller 220. The first drive head and the second drive head respectively drive the first roller 210 and the second roller 220 to rotate, and the cleaning cloth 240 sleeved on the first roller 210 and the second roller 220 rotates under the drive of the first roller 210 and the second roller 220.

[0063] Furthermore, the floor brush 100 is provided with a transmission assembly that drives the first transmission head and the second transmission head. The drive assembly also includes a drive motor, which is connected to the first transmission head to drive the first transmission head to rotate and drives the second transmission head to rotate synchronously with the first transmission head through the transmission assembly. Alternatively, the drive motor is connected to the second transmission head to drive the second transmission head to rotate and drives the first transmission head to rotate synchronously with the second transmission head through the transmission assembly.

[0064] One end of the first roller 210 is connected to the drive assembly on the floor brush 100, and the other end is connected to the side plate 212. To ensure a large cleaning area, the first roller 210 has a relatively long axial length. If the first roller 210 is a long strip roller supported only by the drive assembly and the two ends of the side plate 212, when cleaning an uneven surface, the first roller 210 will experience uneven axial force. Protrusions or foreign objects on the surface will exert an upward lifting force on the first roller 210, causing it to deform. Due to the long axial length of the first roller 210, after the force point deforms under the lifting force, the deformation gradually increases along the axial direction of the first roller 210, causing the first roller 210 to be lifted along the axial direction. The pressure of the cleaning assembly 200 on the ground decreases, and even a part of the bottom area of ​​the cleaning assembly 200 may not be able to contact the surface to be cleaned, and the surface cleaning device cannot achieve a cleaning effect.

[0065] As another implementation scheme in this embodiment, optionally, the driving component includes a first driving motor that drives the first transmission head to rotate and a second driving motor that drives the second transmission head to rotate, wherein the first driving motor and the second driving motor drive the first transmission head and the second transmission head to rotate synchronously.

[0066] Furthermore, the length of the drive section 214 is less than the length of the transmission section 215. One end of the drive section 214 is movably connected to the drive assembly of the floor brush 100. After the cleaning assembly 200 is removed from the floor brush 100, one end of the drive section 214 is suspended. While ensuring that the axial width of the cleaning assembly 200 remains unchanged, the length of the drive section 214 is minimized to improve the support strength of the first support part 233 on the drive section 214. On the one hand, this avoids deformation of the drive section 214 under stress. On the other hand, even if the drive section 214 deforms under stress, due to its relatively small length, the axial deformation is smaller compared to rollers with longer axial lengths, thus minimizing the impact on the operation of the cleaning assembly 200. Furthermore, the length of the drive section 214 is L. 驱 The length of transmission section 215 is L. 传 The ratio L of the length of the drive section 214 to the length of the transmission section 215 驱 :L 传 The ratio is between 1:1 and 1:8. Optional, L 驱 and L 传 The ratio is 1:1, the drive section 214 is 120mm long, and the transmission section 215 is 120mm long. Optional, L 驱 and L 传 The ratio is 1:3, the drive section 214 is 60mm long, and the transmission section 215 is 180mm long. Optional, L 驱 and L 传 The ratio is 1:6, the length of the drive section 214 is 40mm, and the length of the transmission section 215 is 240mm. Optional, L 驱 and L传 The length ratio is 1:8, the length of the drive section 214 is 30mm, and the length of the transmission section 215 is 240mm.

[0067] Furthermore, the drive section 214 and the driven section 215 have the same diameter. Optionally, the drive section 214 and the driven section 215 are two separate rollers. Optionally, the drive section 214 and the driven section 215 can also be two sections on a single roller.

[0068] Optionally, the first roller 210 and the second roller 220 have equal axial lengths, between 220mm and 300mm, to ensure the cleaning area of ​​the cleaning assembly 200.

[0069] The support frame 230 is also provided with a second support portion 234 fixedly connected to the side plate 212. One end of the transmission section 215 is connected to the side plate 212 through the second support portion 234, and the other end is connected to the first support portion 233. The two ends of the transmission section 215 are fixedly connected to the first support portion 233 and the second support portion 234 respectively. When the surface cleaning device performs cleaning operations, even if it is subjected to external impact, the transmission section 215 is fixed and not easily deformed because both ends are fixedly connected. On the other hand, since both ends are fixed by the support frame 230, even if the local stress area deforms, the deformation of the transmission section 215 in the axial direction is gradually amplified under the support of the first support portion. Thirdly, without changing the axial width of the cleaning component 200, the first roller 210 is divided into a drive section 214 and a transmission section 215. The length of the transmission section 215 is less than the length of the first roller 210, reducing the axial length of the transmission section 215 and increasing its strength. Fourth, when the cleaning assembly 200 is detached from the floor brush 100, the transmission section 215 remains fixed to the support frame 230 from both ends by the first support part 233 and the second support part 234. This overcomes the tension force exerted by the taut cleaning cloth 240 on the transmission section 215, causing it to move towards the support frame 230, thus ensuring that the transmission section 215 is stably mounted on the support frame 230 without relative movement. In summary, by fixing the transmission section 215 at both ends, the stable operation of the transmission section 215 is ensured, extending the service life of the cleaning assembly 200 and improving its operational stability.

[0070] As another implementation in this embodiment, optionally, a sixth support portion can be provided on the support frame 230. The sixth support portion and the first support portion 233 are located on the same axis, dividing the first roller 210 into three segments. The drive assembly, the first support portion 233, the sixth support portion, and the side plate 212 together provide four-point support for the first roller 210 in the axial direction. This increases the strength of the first roller 210 without changing the axial area of ​​the cleaning assembly 200, preventing the second roller 220 from deforming under stress. Optionally, a seventh support portion can also be provided on the support frame 230, located on the same axis as the first support portion 233 and the sixth support portion, dividing the first roller 210 into four segments and forming five-point support in the axial direction of the first roller 210, thereby increasing the strength of the first roller 210 and preventing deformation.

[0071] As one implementation in this embodiment, the second roller 220 is provided with a third support portion 234 and a fourth support portion 235 at both ends. Optionally, a fifth support portion may also be provided on the support frame 230. The second roller 220 includes a third roller connected to the floor brush 100 and a fourth roller connected to the side plate 212, with the fifth support portion located between the third roller and the fourth roller. The second roller 220 is axially supported by the third support portion, the fourth support portion, and the fifth support portion, forming a three-point support to fix the second roller 220. Without changing the axial cleaning area of ​​the cleaning assembly 200, the strength of the second roller 220 is increased, and deformation of the second roller 220 under stress is reduced or avoided.

[0072] Furthermore, as the cleaning cloth 240 rotates under the drive of the first roller 210 to wipe the surface to be cleaned, sliding friction occurs between the support portion on the support frame 230 and the cleaning cloth 240, while rolling friction occurs between the first roller 210 and / or the second roller 220 and the cleaning cloth 240. Given the same surface roughness, sliding friction is greater than rolling friction. Therefore, the more mounting portions are provided along the same axial direction, the more difficult it is for the cleaning cloth 240 to rotate with the first roller 210 or to drive the second roller 220 to rotate. Therefore, preferably, a first support portion 233 is provided on the first roller 210, dividing the first roller 210 into a drive section 214 and a transmission section 215, providing three-point support for the first roller 210 in the axial direction. This improves the bending resistance of the first roller 210, ensuring the stable operation of the cleaning assembly 200, and also prevents excessive friction between the first roller 210 and the cleaning cloth 240 in the axial direction, thus avoiding excessive output power from the drive assembly and shortening the operating time of the surface cleaning device. Alternatively, it can avoid the problem of the cleaning cloth rotating too slowly and having low cleaning efficiency.

[0073] Furthermore, the first support part 233 is provided with a connecting part 216. One end of the connecting part 216 is connected to the drive section 214, and the other end is connected to the transmission section 215, so that the drive section 214 and the transmission section 215 rotate synchronously.

[0074] Furthermore, the driving section 214 and the driven section 215 have the same diameter. When the cleaning cloth 240 is tensioned, the driving section 214 and the driven section 215 at least partially abut against the cleaning cloth 240 and provide power for the rotation of the cleaning cloth 240. Increasing the effective length of the first roller 210 and the driving length of the cleaning cloth 240 maximizes the width of the cleaning cloth 240, thereby increasing the cleaning area of ​​the cleaning assembly 200. Optionally, the driving section 214 and the driven section 215 are two separate rollers that rotate synchronously under the drive of the driving assembly via a connecting part.

[0075] Optionally, the driving section 214 and the driven section 215 are two sections of a roller. A connecting part with a diameter smaller than that of the driving section 214 and the driven section 215 is provided between the driving section 214 and the driven section 215. The first support part 233 is a detachable upper and lower structure that is fastened to the upper and lower surfaces of the connecting part to axially limit the connecting part.

[0076] Furthermore, the first support portion 233 is a ring with a through hole inside, and the connecting portion 216 is sleeved inside the ring. The diameter of the connecting portion 216 is smaller than the diameter of the first roller 210, and it is sleeved inside the first support portion 233. The first support portion 233 circumferentially limits the connecting portion 216. When the first roller 210 deforms due to uneven force, the first support portion 233 provides support force to the first roller 210, reducing the influence of external force on the first roller 210 and making the cleaning assembly 200 operate stably. On the other hand, when the drive section 214 or transmission section 215 of the first roller 210 deforms due to force, the deformation is amplified along the axial direction of the first roller 210. The connecting portion 216, which is circumferentially limited by the first support portion 233, to a certain extent blocks or reduces the amplification of the axial deformation of the first roller 210.

[0077] Furthermore, a bearing 2332 is fitted inside the ring, and a connecting part 216 is fitted inside the bearing 2332 to make the drive section 214 and the transmission section 215 rotate synchronously.

[0078] In one specific implementation of this embodiment, the connecting part 216 is a rotating shaft extending to both ends and fitted inside the bearing 2332. One end of the rotating shaft is connected to the driving section 214, and the other end is connected to the transmission section 215. Specifically, the end of the driving section 214 that mates with the connecting part 216 is a groove. The connecting part 216 passes through the first support part 233 and is inserted into the groove, and is fixedly connected to the driving section 214 by screws. The mating point between the transmission section 215 and the connecting part 216 is the same as that between the driving section 214 and the connecting part 216. With this solution, the connecting part 216 is fitted into the driving section 214, the first support part 233, and the transmission section 215. On the one hand, this achieves stable transmission between the driving section 214 and the transmission section 215, enabling the driving section 214 and the transmission section 215 to maintain synchronous rotation. On the other hand, it prevents dirt from entering the gaps between the drive section 214 and the connecting part 216, and between the transmission section 215 and the connecting part 216, and prevents the first roller 210 from getting stuck or scrapped during operation, which would affect the cleaning effect and reduce the service life of the surface cleaning device.

[0079] Another implementation provided in this embodiment is as follows: Optionally, the connecting part 216 is a protrusion located at one end of the transmission section 215. The connecting part 216 is sleeved inside the bearing 2332 and passes through the through hole of the first support part 233 to connect with the drive section 214. The drive section 214 has a groove at one end that mates with the connecting part 216. The protrusion passes through the groove and is fixedly connected to the groove by screws. The transmission section 215 is sleeved in the drive section 214 by the connecting part 216. The rotation of the drive section 214 drives the connecting part 216 sleeved in the drive section 214 to rotate synchronously, thereby causing the transmission section 215 and the drive section 214 to rotate synchronously, thereby causing the cleaning cloth 240 to be evenly stressed in the axial direction and to operate stably when wiping the surface to be cleaned. The connecting part 216 is located on the transmission section 215 and is integrally formed with the transmission section 215. There is no installation gap between the connecting part 216 and the transmission section 215, reducing the possibility of dirt entering the gap and getting stuck during the rotation of the first roller 210. On the other hand, the transmission section 215, which rotates together with the drive section 214, extends into the drive section 214, improving the synchronization of the rotation of the transmission section 215 and the drive section 214. The connecting part 216 is fitted inside the drive section 214 to prevent dirt from entering and causing jamming, which would affect the operational stability of the surface cleaning device.

[0080] Another implementation provided in this embodiment is as follows: Optionally, the connecting part 216 is a protrusion located at one end of the driving section 214. The connecting part 216 is sleeved inside the bearing 2332 and passes through the through hole of the first support part 233 to connect with the transmission section 215. The transmission section 215 has a groove at one end that mates with the driving section 214. The protrusion passes through the groove and is fixedly connected to the groove by screws. The driving section 214 is at least partially sleeved inside the transmission section 215 through the connecting part 216, causing the driving section 214 to rotate and drive the transmission section 215 to rotate synchronously. This ensures that the cleaning cloth 240 is subjected to uniform force in the axial direction and operates stably when wiping the surface to be cleaned. The connecting part 216 is located on the driving section 214 and is integrally formed with the driving section 214. There is no installation gap between the connecting part 216 and the driving section 214, reducing the possibility of dirt entering the gap and getting stuck during the rotation of the first roller 210. On the other hand, the drive section 214 extends into the transmission section 215, improving the synchronization of rotation between the transmission section 215 and the drive section 214. This allows the drive section 214 to be fitted inside the transmission section 215, preventing dirt from entering and causing jamming, which would affect the stability of the surface cleaning device's operation.

[0081] Furthermore, the connecting end of the connecting part 216 on the drive section 214 is a hexagonal bevel 2162. The groove of the transmission section 215, which mates with the connecting part 216, has a hexagonal groove 2335 that mates with the hexagonal bevel 2162. The connecting part 216 and the transmission section 215 are fixedly connected by countersunk screws. The hexagonal bevel 2162 of the connecting part 216 abuts against the inner wall of the hexagonal groove 2335 within the groove of the transmission section 215. When the drive section 214 rotates, the connecting part 216 rotates along with it. As the connecting part 216 rotates, the hexagonal bevel 2162 rotates, causing the hexagonal groove 2335 to twist, thus causing the transmission section 215 to rotate synchronously with the drive section 214. This technical solution ensures stable transmission between the drive section 214 and the transmission section 215, preventing the cleaning cloth 240 from twisting and deforming, which would affect the cleaning effect.

[0082] Another implementation provided in this embodiment is as follows: Optionally, the drive section 214, transmission section 215, and connecting part 216 are integrally formed into a single roller. The diameters of the drive section 214 and transmission section 215 are equal, while the diameter of the connecting part 216 is smaller than that of the drive section 214. The first support part 233 is installed by upper and lower snap-fitting, and is fastened to the upper and lower surfaces of the connecting part 216 to limit its circumferential movement. Alternatively, the first support part 233 has a notch so that the connecting part 216 can be snapped into the first support part 233 through the notch.

[0083] Furthermore, the first support portion 233 includes a semi-closed end 2336 that abuts against the drive section 214 and an open end 2337 that abuts against the transmission section 215. The semi-closed end 2336 includes a side wall disposed opposite to the drive section 214 and a through hole. The open end 2337 includes an inwardly recessed wrapping portion and an annular wall surrounding the wrapping portion.

[0084] The cleaning component 200 is mounted on the floor brush 100. One end of the drive section 214 abuts against the drive component, and the other end abuts against the side wall of the first support part 233, thereby limiting the left and right movement of both ends of the drive section 214. This prevents the drive section 214 from rotating and shifting left and right during operation of the surface cleaning device, or from shifting left and right due to uneven axial force when the surface cleaning device moves on uneven surfaces. This would prevent the drive section 214 from stably supporting and driving the cleaning cloth 240 to rotate, affecting the stability of the surface cleaning device's operation. This technical solution utilizes the drive component and the side wall of the first support part 233 to limit the left and right movement of the drive section 214, preventing left and right displacement and ensuring operational stability.

[0085] When the cleaning assembly 200 is detached from the floor brush 100, one end of the drive section 214 is suspended in the air. The taut cleaning cloth 240 exerts an inward squeezing force on the first roller 210 and the second roller 220. The drive section 214, with one end suspended, needs to overcome the inward squeezing force of the cleaning cloth 240 and remain stable under the support of the first support 233. The side wall of the first support 233 abuts against the drive section 214 to provide stable support for the drive section 214.

[0086] On the other hand, since the first support portion 233 has a sidewall at the point where it abuts against the drive section 214, the diameter of the through hole in the sidewall is smaller than the outer diameter of the first support portion 233. The diameter of the connecting portion 216, which passes through the through hole of the first support portion 233 and allows the drive section 214 and the transmission section 215 to rotate synchronously, is smaller than the diameter of the drive section 214, and similarly, the diameter of the connecting portion 216 is smaller than the diameter of the transmission section 215. When the cleaning assembly 200 is removed from the floor brush 100, if the drive section 214, which is suspended at one end, deforms under the tension of the cleaning cloth 240, the connecting portion 216, which passes through the drive section 214 or is integrally formed with the drive section 214, may deform along with the deformation of the drive section 214, and the degree of deformation is amplified along the axial direction of the first roller 210. This design makes the diameter of the connecting part 216 smaller than the diameter of the driving section 214. Reducing the diameter of the connecting part 216 increases its bending strength. On the one hand, this makes the connecting part 216 less prone to deformation due to the deformation of the driving section 214, thus preventing deformation of the driving section 215 after deformation, which would amplify the impact of the driving section 214's deformation. This extends the service life of the cleaning assembly 200 and reduces the impact of deformation. On the other hand, the connecting part 216 is fitted inside the side wall of the first support part 233, and the side wall of the semi-closed end 2336 of the first support part 233 circumferentially limits the connecting part 216. This prevents the connecting part 216 from deforming along with the driving section 214 when it is subjected to external force, thus preventing amplification of the driving section 214's axial deformation and reducing the operational stability of the surface cleaning device.

[0087] Third, the first support part 233 with a semi-closed end 2336 has its side wall abutting against the drive section 214, which can prevent dirt from entering the transmission section 215 from the side, causing the transmission section 215 to jam and rotate abnormally, causing the cleaning cloth 240 to twist, affecting the stability of operation and cleaning efficiency.

[0088] As one implementation of this embodiment, optionally, the first support part 233 can be an independent part that can be detachably installed from the support frame 230, allowing the user to disassemble, wash, and replace it.

[0089] Furthermore, the floor brush 100 is provided with a positioning part 2123 that matches the side plate 212. The side plate 212 and the positioning part 2123 are installed together to achieve the matching and limiting of the side plate 212 on the floor brush 100, ensuring the stable installation of the cleaning component 200. The first roller 210 and the second roller 220 are fixedly installed to the side plate 212 through the support frame 230. The two ends of the cleaning component 200 are fixed by the floor brush 100 and the side plate 212 respectively, so that it is stably limited in the axial direction when rotating in the receiving cavity 211 of the floor brush 100, and will not come out of the receiving cavity 211.

[0090] Furthermore, the side plate 212 includes a limiting part 2122 and an abutting part 2121. The abutting part 2121 is an elongated connecting plate that mates with the support frame 230. The first roller 210 and the second roller 220 are mounted on the side plate 212 and rotatably connected to it. The limiting part 2122 extends rearward in a direction perpendicular to the axis of the first roller 210 and / or the second roller 220. The limiting part 2122 cooperates with the positioning part 2123 to achieve the mating installation of the cleaning assembly 200 and the floor brush 100.

[0091] As one implementation scheme in this embodiment, optionally, the cleaning component 200 can be detachably installed with the floor brush 100 via the limiting part 2122.

[0092] Furthermore, the floor brush 100 is provided with a positioning part 2123 that cooperates with the limiting part 2122. Further, the limiting part 2122 is a limiting protrusion, and the positioning part 2123 is a limiting cavity that cooperates with the limiting protrusion. Alternatively, the limiting part 2122 is a limiting cavity, and the positioning part 2123 is a limiting protrusion that cooperates with the limiting cavity.

[0093] Furthermore, the limiting part 2122 on the side plate 212 is a magnet, and the positioning part of the floor brush 100 is a magnet with the opposite magnetism to the limiting part 2122 or a metal sheet that can be attracted to the magnet of the limiting part 2122. Alternatively, the limiting part 2122 is a metal sheet that can be attracted to a magnet, and the positioning part on the floor brush 100 is a magnet that can attract the limiting part 2122. This allows the side plate 212 to engage with the floor brush 100 via the limiting part 2122.

[0094] Furthermore, the limiting part 2122 is a limiting protrusion or limiting groove with a magnet, and the positioning part on the floor brush 100 that cooperates with the limiting part 2122 is a limiting groove or limiting protrusion with a magnet or a metal sheet.

[0095] The central axis of the cleaning component 200 is set lower than the axis of the limiting part 2122. The central axis of the cleaning component 200 is a straight line L formed by the midpoint of the line connecting the centers of the first roller 210 and the second roller 220. The straight line L is set lower than the straight line M of the center line of the upper limiting part 2122 of the side plate 212. This makes the fixed end of the cleaning component 200 to the floor brush 100 higher than the center of the cleaning component 200. The cleaning component 200 is fixed or detachably mounted on the floor brush 100 by the side plate 212, so that the side plate 212 generates downward pressure on the cleaning component 200, increasing the pressure on the ground when the cleaning component 200 wipes the surface to be cleaned. When the surface cleaning device moves on the uneven surface to be cleaned, the uneven axial force makes it easy to tilt upward under the action of external force. The side plate 212 gives the cleaning component 200 downward pressure, which to a certain extent prevents the cleaning component 200 from tilting upward, improves the bending resistance of the cleaning component 200, makes it less prone to local deformation, and ensures cleaning efficiency.

[0096] The first roller 210 and the second roller 220 on the cleaning assembly 200 are arranged in parallel. Furthermore, the radial diameters of the first roller 210 and the second roller 220 can be the same or different. To ensure a sufficient cleaning area, the axial lengths of the first roller 210 and the second roller 220 are relatively long. Optionally, the first roller 210 and the second roller 220 are brush rollers with the same radial diameter. Further, while ensuring the cleaning force of the cleaning assembly 200 on the surface to be cleaned, to reduce the thickness of the floor brush 100 for easier user operation, the first roller 210 and the second roller 220 can be selected as a double-small-roller tracked cleaning assembly 200 with equal radial diameters of 25mm-35mm. On the one hand, the smaller rollers with reduced radial diameters of the first roller 210 and the second roller 220 have better strength compared to rollers with larger diameters, and experience less deformation when subjected to external impact. On the other hand, using smaller rollers with smaller radial diameters reduces the overall height of the floor brush 100, making it easier for the floor brush 100 to reach into crevices such as under beds and tables, achieving an ultra-thin surface cleaning device for cleaning hard-to-reach areas.

[0097] As one implementation in this embodiment, optionally, the first roller 210 and the second roller 220 are brush rollers with different radial diameters. Further, the first roller 210 is closer to the limiting portion 2122 on the side plate 212 than the second roller 220, and the radial diameter of the first roller 210 is larger than that of the second roller 220. Therefore, the axis of the first roller 210 is higher than the axis of the second roller 220. The side plate 212 mounts the cleaning assembly 200 onto the floor brush 100 via the limiting portion 2122, and the side plate 212 exerts downward pressure on the cleaning assembly 200. The first roller 210, which is closer to the limiting portion 2122 of the side plate 212, experiences less downward pressure, while the second roller 220, which is farther from the limiting portion 2122, experiences greater downward pressure. This satisfies the installation strength requirement of the second roller 220, which is farther from the limiting portion 2122, preventing it from warping under the pressure of the side plate 212. This ensures stable contact between the second roller 220 and the surface to be cleaned, increasing the friction between them and improving cleaning efficiency.

[0098] Furthermore, the cleaning cloth 240 is sleeved on the first roller 210 and the second roller 220, and the axial length of the cleaning cloth 240 is greater than or equal to the axial length of the first roller 210 and the second roller 220. Optionally, the axial length of the cleaning cloth 240 is greater than the axial length of the first roller 210 and the second roller 220. The cleaning cloth 240 completely covers the first roller 210 and the second roller 220, and the contact area between the cleaning cloth 240 and the first roller 210 and the second roller 220 is large, which allows for sufficient friction with the first roller 210 and the second roller 220, and it rotates under the drive of the first roller 210. At the same time, the first roller 210 and the second roller 220, which abut against the cleaning cloth 240, provide downward pressure for the cleaning cloth 240 to wipe the surface to be cleaned, so that the cleaning cloth 240 makes full contact with the surface to be cleaned, thereby improving cleaning efficiency.

[0099] Optionally, both the third support portion 235 and the second support portion 234 are disposed on the side plate 212. Further, at least one of the second support portion 234 and the third support portion 235 disposed on the side plate has a diameter smaller than the diameter of the brush roller coaxially arranged therewith. The second support portion 234 and the third support portion 235 are at least partially correspondingly disposed and located at the ends of the first roller 210 and the second roller 220, respectively. The support portions abut against the cleaning cloth 240, failing to provide rotational tension for the cleaning cloth 240 and instead hindering its rotation. Furthermore, since both the second support portion 234 and the third support portion 235 are located at the ends of the brush rollers, only the cleaning cloth 240 at the corresponding position on the brush roller drives the cleaning cloth 240 to rotate, providing limited tension. Since both the second support portion 234 and the third support portion 235 abut against the cleaning cloth 240, the corresponding positions of at least partially corresponding second support portions 234 and third support portions 235 cannot provide tension in the rotation direction of the cleaning cloth 240, resulting in uneven force on the cleaning cloth 240 and potential twisting. Therefore, at least one of the second support portion 234 and the third support portion 235 has a diameter smaller than the diameter of the brush roller that is coaxially arranged therewith, thereby reducing the resistance at the corresponding position of the support portion and slowing down the twisting of the cleaning cloth 240.

[0100] Optionally, the diameter of the third support portion 235 and / or the fourth support portion 236 is smaller than the diameter of the second roller 220. When the cleaning cloth 240 is mounted on the support frame 230 in a tensioned state, it at least partially abuts against the first roller 210 and the second roller 220, and rotates under the drive of the first roller 210 and / or the second roller 220. The third support portion 235 and the fourth support portion 236 are fixed supports. If the cleaning cloth 240 abuts against the third support portion 235 and the fourth support portion 236 during rotation, frictional force is generated on its surface, which hinders the rotation of the cleaning cloth 240. This hinders the movement of the cleaning cloth 240, and at the same time, the cleaning cloth 240 is prone to torsion due to uneven force along the axial direction of the second roller 220, affecting its floor cleaning effect. When the diameter of the third support portion 235 and / or the fourth support portion 236 is smaller than the diameter of the second roller 220, and the cleaning cloth 240 is installed on the support frame 230 in a tensioned state, a gap is created between the cleaning cloth 240 and the third support portion 235 and / or the fourth support portion 236, reducing or eliminating the friction between the third support portion 235 and / or the fourth support portion 236 and the cleaning cloth 240, thereby reducing the resistance when the cleaning cloth 240 rotates, and to a certain extent improving the uneven force on the cleaning cloth 240 in the axial direction of the second roller 220 when it rotates.

[0101] Furthermore, the cleaning component 200 is mounted on the floor brush 100. The third support portion 235 and / or the fourth support portion 236 have second support ribs at their bottoms near the surface to be cleaned, ensuring that the cleaning cloth 240, fitted onto the support frame 230, remains taut. The second support ribs abut against the cleaning cloth 240, increasing the pressure exerted by the cleaning cloth 240 on the ground when wiping the surface, ensuring stable adhesion between the cleaning cloth 240 and the ground, and improving cleaning efficiency. On the other hand, the second support ribs at the bottom of the third support portion 235 and / or the fourth support portion 236 enhance the support strength of the third support portion 235 and / or the fourth support portion 236. When the surface cleaning device operates on uneven surfaces to be cleaned, the third support portion 235 and / or the fourth support portion 236 with the second support ribs are less prone to deformation under external forces; the support ribs serve to increase strength and buffer external forces.

[0102] Example 2

[0103] like Figure 12 As shown, the difference between this embodiment and the above embodiment is that the third support 235 and the second support 234 are both disposed on the side plate 212, and the width L2 of the second support 234 along the axial direction of the cleaning component 200 is smaller than the width L3 of the third support 235 along the axial direction of the cleaning component 200.

[0104] Optionally, as one implementation of this embodiment, the driving component is connected to the first roller 210. The first roller 210 rotates under the drive of the driving component, which in turn rotates the cleaning cloth 240. The third support 235 and the second support 234 are both disposed on the side plate 212 to fix the second roller 220 and the first roller 210 respectively, allowing them to be stably installed with the support frame 230. To ensure that the cleaning cloth 240, sleeved on the first roller 210 and the second roller 220, experiences uniform axial force, the first mounting frame and the second mounting frame are at least partially offset axially in the cleaning component 200 to prevent uneven axial force on the cleaning cloth 240 from causing torsion. When the cleaning cloth 240 rotates, both the second support 234 and the third support 235 experience sliding friction with the cleaning cloth 240, generating significant resistance. Both the second support portion 234 and the third support portion 235 are disposed on the side plate 212, such that at least a portion of the second support portion 234 and the third support portion 235 overlap in the direction parallel to the side plate 212. This ensures that the cleaning cloth 240 located at the corresponding position is neither rotated by the tension provided by the first roller 210 nor by the frictional force exerted on the cleaning cloth 240 by the second support portion 234 and the third support portion 235. The width of the second support portion 234 in the direction of the cleaning assembly 200 is smaller than the width of the third support portion 235 in the direction of the cleaning assembly 200. Even if at least a portion of the third support portion 235 is located at the position corresponding to the rotation direction of the cleaning cloth 240, the rotation of the first roller 210 provides a tension force to the cleaning cloth 240 to cause it to rotate, enabling it to overcome the resistance of the third support portion 235 to rotate. The influence of the second support portion 234 and the third support portion 235 on the rotation of the cleaning cloth 240 is minimized, allowing it to rotate stably.

[0105] Optionally, as another implementation of this embodiment, the cleaning assembly 200 operates such that the first roller 210 and the second roller 220 jointly drive the cleaning cloth 240 to rotate. That is, both the first roller 210 and the second roller 220 provide tension for the rotation of the cleaning cloth 240. Therefore, to reduce the resistance to the rotation of the cleaning cloth 240 caused by the friction between the second support portion 234 and the third support portion 235 and the cleaning cloth 240, the widths of the second support portion 234 and the third support portion 235 along the direction of the cleaning assembly 200 are made inconsistent. Optionally, the width of the second support portion 234 is smaller than the width of the third support portion 235, so that the projections of the second support portion 234 and the third support portion 235 in the direction parallel to the side plate 212 do not completely overlap, and at least part of the second roller 220 or the first roller 210 reduces the rotational resistance of the cleaning cloth 240.

[0106] Optionally, the first support portion 233 and the second support portion 234 are respectively disposed at both ends of the first roller 210, and the third support portion 235 and the fourth support portion 236 are respectively disposed at both ends of the second roller 220.

[0107] Optionally, the first support portion 233 and the second support portion 234 are respectively disposed at both ends of the first roller 210, and the third support portion 235 and the fourth support portion 236 are respectively disposed at both ends of the second roller 220.

[0108] Furthermore, the support frame 230 is also provided with a second rib 237 along the rotation direction of the cleaning cloth 240. The second rib 237 abuts against the cleaning cloth 240. When the cleaning cloth 240 is sleeved on the support frame 230 and kept in a taut state, the second rib 237 increases the pressure of the cleaning cloth 240 on the surface to be cleaned, thereby improving the cleaning efficiency of the cleaning component 200.

[0109] Example 3

[0110] like Figure 13 As shown, the difference between this embodiment and the previous embodiment is that the first support portion 233 and the second support portion 234 are respectively disposed at both ends of the first roller 210, and the third support portion 235 and the fourth support portion 236 are respectively disposed at both ends of the second roller 220. The first support portion 233 and the fourth support portion 236 are partially disposed at the same end of the first roller 210 and the second roller 220. The first support portion 233 and the fourth support portion 236 are at least partially offset in the axial direction of the cleaning assembly 200. That is, the widths of the first support portion 233 and the fourth support portion 236 are not equal.

[0111] As one implementation in this embodiment, optionally, the first support portion 233 and the fourth support portion 236 are located at the ends of the first roller 210 and the second roller 220 near the drive assembly, respectively. The first support portion 233 and the fourth support portion 236 are at least partially offset in the axial direction of the cleaning assembly.

[0112] Furthermore, as one implementation in this embodiment, the driving component is connected to the first roller 210. The first roller 210 rotates under the drive of the driving component, which in turn rotates the cleaning cloth 240. The lateral width L1 of the first support portion 233 is smaller than the lateral width L4 of the fourth support portion 236. This allows the first roller 210 to rotate with an effective rotation length L under the drive of the driving component. 主 The effective rotation length L of the second roller is greater than 220. 从 The rotation length here refers to the length of the brush roller that can rotate under the drive of the drive assembly, cleaning cloth, or other drive source.

[0113] Optionally, the drive assembly is connected to the second roller 220, which rotates under the drive assembly, thus rotating the cleaning cloth 240. The lateral width L4 of the fourth support portion 236 is smaller than the lateral width L1 of the first support portion 233. The principle is the same as described above and will not be repeated here.

[0114] Furthermore, the second support portion 234 and the third support portion 235 are respectively disposed at one end of the first roller 210 and the second roller 220. Optionally, the second support portion 234 and the third support portion 235 are disposed opposite each other in the axial direction of the cleaning assembly 200, and the second support portion 234 and the third support portion 235 have the same width. Alternatively, the second support portion 234 and the third support portion 235 are at least partially offset in the axial direction of the cleaning assembly 200, and the second support portion 234 and the third support portion have different widths. Further, as... Figure 14 As shown, the width L2 of the second support part 234 is smaller than the width L3 of the third support part.

Claims

1. A stable running surface cleaning device, comprising a floor brush and a cleaning assembly detachably mounted on the floor brush, the cleaning assembly comprising a first roller and a second roller arranged in parallel, a supporting frame, a side plate and a cleaning cloth, when performing a cleaning operation, the first roller, the second roller and the supporting frame jointly support the cleaning cloth, the supporting frame comprises a first mounting frame arranged along an axial direction of the first roller and a second mounting frame arranged along an axial direction of the second roller, the first mounting frame comprises a first supporting portion and a second supporting portion arranged oppositely, and the second mounting frame comprises a third supporting portion and a fourth supporting portion arranged oppositely, characterized in that, The cleaning cloth at least partially covers the first mounting frame and the second mounting frame, and the first mounting frame and the second mounting frame are at least partially misaligned in the axial direction of the cleaning assembly so that the first mounting frame at least partially corresponds to the second roller; wherein the at least partial misalignment refers to the projections of the first mounting frame and the second mounting frame on a plane parallel to the first roller and / or the second roller do not completely coincide.

2. The stable-to-run surface cleaning device of claim 1, wherein, The first roller comprises a driving section and a transmission section, and the first support portion is arranged between the driving section and the transmission section, and the first support portion is at least partially provided with the second roller at a corresponding position in the rotation direction of the cleaning cloth.

3. The surface cleaning device of claim 1, wherein, The first support portion is arranged at an end portion of the first roller, and the fourth support portion is arranged at an end portion of the second roller corresponding to the first support portion, and the first support portion and the fourth support portion are at least partially misaligned in the axial direction of the cleaning assembly.

4. The stable-to-run surface cleaning device of any of claims 1-3, wherein, The second support portion and the third support portion are arranged on the side plate, one end of the first roller is rotationally connected with the second support portion, and the other end is connected with the driving assembly, and the width of the second support portion in the direction of the cleaning assembly is smaller than the width of the third support portion in the direction of the cleaning assembly.

5. The stable-to-run surface cleaning device of claim 4, wherein, The first roller rotates to drive the cleaning cloth to rotate, and the second roller rotates under the driving of the rotating cleaning cloth, and the effective rotation length of the first roller is greater than the effective rotation length of the second roller.

6. The stable-to-run surface cleaning device of claim 2, wherein, The length of the driving section is smaller than the length of the transmission section.

7. The stable-to-run surface cleaning device of claim 2, wherein, The diameter of the driving section is equal to the diameter of the transmission section, and the diameter of the first support portion is equal to or smaller than the diameter of the driving section.

8. The stable-to-run surface cleaning device of claim 2, wherein, The first support portion is a circular ring with a through hole in the center, and a connecting portion is arranged in the first support portion, one end of the connecting portion is connected with the driving section, and the other end is connected with the transmission section.

9. The stable-to-run surface cleaning device of claim 4, wherein, At least one of the second support portion and the third support portion has a diameter smaller than the diameter of the first roller or the second roller arranged coaxially therewith.

10. The stable-to-run surface cleaning device of claim 2, wherein, The ground brush is provided with a scraping strip abutting against the cleaning cloth, and the first support portion is provided with a rib strip abutting against the cleaning cloth at a corresponding position of the scraping strip.

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