Rolling brush assembly and surface cleaning device

Abstract

The present application relates to a kind of brush roller assembly and surface cleaning device, including first brush roller, second brush roller and the drive part for simultaneously driving first brush roller and second brush roller rotation, first brush roller includes the first sleeve with first inner cavity being limited inside and the first bristle being arranged on the outer peripheral wall surface of first sleeve, second brush roller includes the second sleeve with second inner cavity being limited inside and the second bristle being arranged on the outer peripheral wall surface of the first sleeve;Drive part includes at least one drive motor, at least one drive motor is at least part of the first inner cavity and / or the second inner cavity being contained in.Corresponding to prior art, the brush roller assembly provided by the technical scheme of the present application is by being arranged in the inside of first brush roller and first brush roller by drive motor and corresponding transmission component, so that the interval between first brush roller and second brush roller is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, and in particular to a roller brush assembly for a surface cleaning device and a surface cleaning device. Surface cleaning device. Background Technology

[0002] Wet surface cleaning equipment generally includes a base with a brush chamber, a roller brush rotatably mounted in the brush chamber, and a... The roller brush provides a liquid supply unit for the cleaning fluid. Driven by a driving device, the roller brush performs cleaning operations on the surface to be cleaned using the cleaning fluid. Existing technology includes a type of surface cleaning device with a pair of roller brushes arranged side-by-side. The brush chambers of this device have left and right openings, and the pair of roller brushes are configured to extend to the corresponding openings, allowing the surface cleaning device to clean corners. However, this type of surface cleaning device places the corresponding transmission components between the pair of roller brushes, resulting in a large distance between the roller brushes. This creates blind spots in the surface cleaning device, reducing its cleaning efficiency. Summary of the Invention

[0003] To address the aforementioned technical problem of a large gap between a pair of roller brushes, the objective of this invention is... A roller brush assembly for a surface cleaning device and a surface cleaning device are provided.

[0004] To achieve the above objectives, the present invention provides a roller brush assembly for a surface cleaning device, comprising a first roller brush, a second roller brush, and a drive unit configured to simultaneously drive the first roller brush and the second roller brush to rotate. The first roller brush includes a first sleeve having a first inner cavity and first bristles disposed on the outer peripheral wall of the first sleeve. The second roller brush includes a second sleeve having a second inner cavity and second bristles disposed on the outer peripheral wall of the second sleeve. The drive unit includes at least one drive motor, and at least a portion of the at least one drive motor is accommodated in the first inner cavity and / or the second inner cavity.

[0005] Compared with the prior art, the roller brush assembly provided by the present invention significantly reduces the distance between the first roller brush and the second roller brush by setting the drive motor and the corresponding transmission device inside the first roller brush and the first roller brush.

[0006] In the above technical solution, preferably, the at least one drive motor defines a drive axis centerline, the first roller brush and the second roller brush define a first rotation axis centerline and a second rotation axis centerline respectively, and the drive axis centerline and the rotation axis centerline are located on the same straight line.

[0007] In the above technical solution, preferably, the at least one drive motor includes a dual-axis motor with a first output shaft and a second output shaft respectively extending from both ends of the axial direction, the first output shaft being drivenly connected to the first roller brush, and the second output shaft being drivenly connected to the second roller brush.

[0008] In the preferred embodiment described above, and even more preferably, the roller brush assembly further includes a first roller brush shaft located in the first inner cavity and driven to rotate by the first output shaft, wherein the first roller brush is supported on the first roller brush shaft.

[0009] In the preferred embodiment described above, and even more preferably, the roller brush assembly further includes a first reducer located in the first inner cavity and used for driving connection between the first output shaft and the first roller brush shaft.

[0010] In the preferred embodiment described above, and even more preferably, the first roller brush is detachably supported on the first roller brush shaft.

[0011] In the preferred embodiment described above, and even more preferably, the roller brush assembly further includes a second roller brush shaft located in the second inner cavity and driven to rotate by the second output shaft, wherein the second roller brush is supported on the second roller brush shaft.

[0012] In the preferred embodiment described above, and even more preferably, the roller brush assembly further includes a second reducer located in the second inner cavity and used for driving connection between the second output shaft and the second roller brush shaft.

[0013] In the preferred embodiment described above, and even more preferably, the second roller brush is detachably supported on the second roller brush shaft.

[0014] In the above-described technical solution, preferably, the roller brush assembly further includes a motor housing, wherein at least one drive motor is housed within the motor housing, and at least a portion of the motor housing is located within the first inner cavity and / or the second inner cavity. More preferably, the motor housing includes a connecting plate configured for assembling the roller brush assembly into a surface cleaning device.

[0015] In the preferred embodiment described above, it is further preferred that at least a portion of the connecting plate protrudes radially beyond the first and second roller brushes.

[0016] In the preferred embodiment described above, more preferably, the connecting plate has a first side surface and a second side surface facing away from each other, the inner end face of the first roller brush sealingly abuts against the first side surface, and the inner end face of the second roller brush sealingly abuts against the second side surface. Even more preferably, the lengths of the first bristles and the second bristles are configured such that, when the first and second roller brushes rotate synchronously, the portion of the first bristles near the first side surface and the portion of the second bristles near the second side surface can intersect each other. This preferred embodiment achieves the effect of eliminating cleaning blind spots between the first and second roller brushes by covering the outer side of the connecting member of the portion covered by the first and second bristles.

[0017] In the above preferred embodiment, it is further preferred that the connecting plate is provided with a wire channel for an electrical wire to pass through.

[0018] In the above technical solution, preferably, the driving part is centrally arranged on the roller brush assembly.

[0019] In another aspect, the present invention provides a surface cleaning device, comprising a housing movable on a surface to be cleaned and a roller brush assembly as described above or any preferred embodiment. The housing is provided with a brush cavity and a suction channel in fluid communication with the brush cavity. The brush cavity has a lower opening and at least one side opening. The roller brush assembly is installed in the brush cavity, and the lower portions of the first roller brush and the second roller brush are exposed from the lower opening. At least one of the outer ends of the first roller brush and the second roller brush is exposed from the at least one side opening.

[0020] In the above technical solution, preferably, the brush cavity has a rear opening that is in fluid communication with the suction channel, and the rear opening faces both the first roller brush and the second roller brush. More preferably, the housing is provided with a second scraper for contact between the first roller brush and the second roller brush, and the second scraper is located at the upper edge of the rear opening.

[0021] In the above technical solution, preferably, the housing is provided with a first scraper for contacting the surface to be cleaned, and the first scraper defines the rear boundary of the lower opening.

[0022] In the above technical solution, preferably, the surface cleaning device is an automatically movable robotic surface cleaning device or a push rod type surface cleaning device. Attached Figure Description

[0023] Figure 1 A perspective view of the first embodiment of the present invention—the roller brush assembly; Figure 2 for Figure 1 The shown roller brush assembly is a cross-sectional view along point AA. Figure 3 for Figure 2 The enlarged view of point B shown; Figure 4 for Figure 2 A magnified view of point C shown below; Figure 5 for Figure 1 An exploded view of the roller brush assembly shown; Figure 6 A three-dimensional schematic diagram of the second embodiment of the present invention—a surface cleaning robot. Figure 1 ; Figure 7 for Figure 6 The surface cleaning robot shown is a cross-sectional view along the DD section shown. Figure 8 for Figure 6 A three-dimensional structural diagram of some components of the surface cleaning robot shown; Figure 9 for Figure 6 The above is a 3D schematic diagram of a surface cleaning robot. Figure 2 ; Figure 10 for Figure 6 The above is a 3D schematic diagram of a surface cleaning robot. Figure 3 Both the first and second roller brushes Separate from the drive section; Figure 11 for Figure 10 The enlarged view of point E shown; Figure 12 This is a three-dimensional structural diagram of a surface cleaning device, which is the third embodiment of the present invention. Detailed Implementation

[0024] To illustrate the technical content, structural features, achieved objectives, and effects of the invention in detail, the technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, construction, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0025] In the following description, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0026] Furthermore, in this application, spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side” (e.g., as in a “sidewall”) are used to describe the relationship between one element and another (other) element as shown in the accompanying drawings. Spatial relative terms are intended to include different orientations of the device in use, operation, and / or manufacture other than those depicted in the drawings. For example, if the device in the drawings is flipped, an element described as “below” or “under” another element or feature would then be positioned “above” said other element or feature. Thus, the exemplary term “below” can include both above and below orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0027] Figure 1 The first embodiment of the present invention is shown—a roller brush assembly 5, which can be attached to a corresponding surface cleaning device and perform cleaning operations on the surface to be cleaned. Combined with Figure 2 and Figure 5 The roller brush assembly 5 includes a first roller brush 51 and a second roller brush 52 arranged side by side, and a drive unit 4 for driving the first roller brush 51 and the second roller brush 52 to rotate synchronously. The first roller brush 51 and the second roller brush 52 are each detachably supported on the left and right sides of the drive unit 4, respectively.

[0028] The drive unit 4 includes a drive motor 41, a motor housing 42, a first reducer 431 and a second reducer 432 located on the left and right sides of the motor housing 42 respectively, and a first brush shaft 451 and a second brush shaft 452 located on the left side of the first reducer 431 and the right side of the second reducer 432 respectively.

[0029] The drive motor 41 is a dual-output-shaft motor and includes a motor housing 411, a motor coil (not shown in the figure) inside the motor housing 411, and a first output shaft 412 and a second output shaft 413 driven by the motor coil. The drive motor 41 defines a drive axis centerline X1. The first output shaft 412 and the second output shaft 413 extend outward along the drive axis centerline X1 from left to right and can rotate synchronously. In other embodiments, the drive unit may also be provided with a pair of single-output-shaft motors from left to right to achieve simultaneous synchronous rotation of the first brush shaft and the second brush shaft.

[0030] The motor housing 42 has a motor cavity 421 located inside itself and a connecting plate 422 formed by a portion of the outer wall facing outward radially. The drive motor 41 is disposed inside the motor cavity 421, and the first output shaft 412 and the second output shaft 413 both pass through the motor housing 42 and are located outside the motor cavity 421.

[0031] Combination Figure 3 The connecting plate 422 is located in the middle of the motor housing 42 and includes an annular disc and a protrusion 423. The annular disc has a first side surface 424 and a second side surface 425 that are opposite to each other, and the distance between the first side surface 424 and the second side surface 425 is configured to be less than 8 mm. The protrusion 423 extends upward and is provided with an electrical connection channel 426 that connects the inside and outside of the motor cavity 421. The electrical connection channel 426 is configured to allow a conductive wire (not shown in the figure) to pass through, so as to realize the electrical connection between the drive motor 41 and an external power source. The protrusion 423 is configured to be fixedly connected to a corresponding surface cleaning device, so as to assemble the roller brush assembly 5 onto the surface cleaning device. In this example, the motor housing 42 is configured to be composed of a first end cap 427 and a second end cap 428 that are mirror images of each other and divide the connecting plate 423 into two parts. In other embodiments, the motor housing may also be a one-piece component, and the connecting plate may be provided at one end or near one end of the motor housing.

[0032] The first reducer 431 includes a first reduction housing 433, a first transmission gear (not shown) located inside the first reduction housing 433, and a first reduction shaft 434 that is drively connected to the first transmission gear. The first reduction housing 433 abuts against the left end of the motor housing 42. The first reduction shaft 434 extends outward along the drive shaft centerline X1. The first transmission gear is configured to be drively connected to the first output shaft 412 so that the drive motor 41 can drive the first reduction shaft 434 to rotate. The first reduction shaft 434 extends outward through the first reduction housing 433.

[0033] The second reducer 432 includes a second reduction housing 435, a second transmission gear (not shown) located inside the second reduction housing 435, and a second reduction shaft 436 that is driveably connected to the second transmission gear. The second reduction housing 435 abuts against the right end of the motor housing 42. The second reduction shaft 436 extends outward along the drive shaft centerline X1. The second transmission gear is configured to drively connect to the second output shaft 413, so that the drive motor 41 can drive the second reduction shaft 436 to rotate. The second reduction shaft 436 extends outward through the second reduction housing 435.

[0034] The first roller brush shaft 451 has a first shaft cavity 453. The first reducer 431 extends into the first shaft cavity 453 and is connected to the first roller brush shaft 451 via a first reduction shaft 434, so as to drive the first roller brush shaft 451 to rotate around the drive axis X1. A first bearing 441 is provided between the first reduction housing 433 and the inner wall of the first shaft cavity 453 to achieve dynamic and static connection between the first reduction housing 433 and the first roller brush shaft 451.

[0035] The left side of the first roller brush shaft 451 is configured to fit over the first roller brush 51, and an interlocking mechanism is provided between the first roller brush shaft 451 and the first roller brush 51. In this example, the interlocking mechanism includes a first connecting portion 454 located at the left end of the first shaft cavity 453 and a first locking button 455 detachably connected to the first connecting portion 454. The first locking button 455 has a lockable position and an unlocked position that can be switched between each other; wherein, the lockable position locks the first roller brush 51 to the first roller brush shaft 451, and the unlocked position allows the first roller brush 51 to disengage from the first roller brush shaft 451. The first locking button 455 is located at the left opening 171 of the brush cavity 17 and protrudes outwards for easy user operation.

[0036] The second roller brush shaft 452 has a second shaft cavity 456. The second reducer 432 extends into the second shaft cavity 456 and is connected to the second roller brush shaft 452 via the second reduction shaft 436 to drive the second roller brush shaft 452 to rotate around the drive axis X1. A second bearing 442 is provided between the second reduction housing 435 and the inner wall of the second shaft cavity 456 to achieve dynamic and static connection between the second reduction housing 435 and the second roller brush shaft 452.

[0037] The right end of the second roller brush shaft 452 is configured to fit onto the second roller brush 52, and an interlocking mechanism is also provided between them. The interlocking mechanism includes a second engagement portion 457 located at the right end of the second shaft cavity 456 and a second locking button 458 detachably connected to the second engagement portion 457. The second locking button 458 has a lockable and unlockable position, wherein the lockable position locks the second roller brush 52 onto the second roller brush shaft 452, and the unlocked position allows the second roller brush 52 to disengage from the second roller brush shaft 452. The second locking button 458 is located at the right opening 172 of the brush cavity 17 and protrudes outward for easy user operation.

[0038] The first roller brush 51 includes a first sleeve 511 defining a first rotation axis, a first cavity 512 axially extending through the first sleeve 511, and first bristles 513 covering the outer surface of the first sleeve 511. The first roller brush 51 is sleeved on the outside of the first roller brush shaft 451 and is driven by the first roller brush shaft 451 to rotate around the first rotation axis.

[0039] The second roller brush 52 includes a second sleeve 521 defining a second rotation axis, a second cavity 522 axially penetrating the second sleeve 521, and second bristles 523 covering the outer surface of the second sleeve 521. The second roller brush 52 is sleeved on the outside of the second roller brush shaft 452 and is driven by the second roller brush shaft 452 to rotate around the second rotation axis. The driving axis X1, the first rotation axis, and the second rotation axis lie on the same straight line.

[0040] The roller brush assembly 5 also includes a first sealing ring 53 and a second sealing ring 54. The roller brush assembly 5 is configured such that when the roller brush assembly 5 is sleeved on the drive part 4, the inner end face of the first sleeve 511 is sealed and abutted against the first side surface 424 through the first sealing ring 53, and the inner end face of the second sleeve 521 is sealed and abutted against the second side surface 425 through the second sealing ring 54. The first bristles 513 and the second bristles 523 can cross each other and cover the lower opening 173 at the connecting plate 422 to eliminate cleaning blind spots.

[0041] In this example, the first roller brush 51 and the second roller brush 52 are of the same length. The drive unit 4 is centrally located within the brush cavity 17. The first reducer 431, the first bearing 441, and the first roller brush shaft 451 are all located within the first cavity 511 of the first roller brush 51. The second reducer 432, the second bearing 442, and the second roller brush shaft 452 are all located within the second cavity 512 of the second roller brush 52. Except for the connecting plate 422 and the corresponding portion of the motor 41, the left side portion of the drive motor 41 and the first end cap 427 are located within the first cavity 512, and the right side portion of the drive motor 41 and the second end cap 428 are located within the second cavity 522. In embodiments where the connecting plate is positioned at one end of the motor housing, the motor and the motor housing (excluding the connecting plate portion) may also be located only within the first cavity or the second cavity.

[0042] Figure 6 This illustration shows a second embodiment of the invention—a surface cleaning robot 100. The surface cleaning robot 100 is a surface cleaning device capable of autonomously moving and simultaneously performing cleaning operations on a surface to be cleaned, including vacuuming, scrubbing, and wastewater recovery. The surface cleaning robot 100 includes a robot housing 1 capable of autonomously moving on the ground, a roller brush unit 5 mounted on the lower part of the robot housing 1, a fluid supply unit, and a wastewater recovery unit. The fluid supply unit stores and supplies cleaning fluid to the roller brush unit 5, and the wastewater recovery unit collects and stores wastewater on the surface to be cleaned. Both the fluid supply unit and the wastewater recovery unit are mounted on the robot housing 1.

[0043] See Figure 8-9 The robot housing 1 includes a top wall 11, a bottom wall 12, side walls 13, and a navigation module 14 for navigating the surface cleaning device 100. In this example, the navigation module 14 extends partially beyond the top wall 11.

[0044] A pair of opposing drive wheels 15 and a driven wheel 16 located behind the drive wheels 15 are mounted on the bottom wall 12. The drive wheels 15 are driven by a moving motor (not shown in the figure) inside the base 1 to rotate, thereby moving the surface cleaning robot 100 on the surface to be cleaned. The driven wheel 16 is a passive wheel that can rotate freely in a plane to control the direction of movement of the surface cleaning robot 100. A master switch 121 for manual operation is also arranged on the bottom wall 12, which allows the user to easily turn off the surface cleaning robot 100.

[0045] Several wall-following sensors 131 are installed on the side wall 13. These sensors monitor the distance between the surface cleaning device 100 and the wall to prevent the surface cleaning robot 100 from colliding with the wall. The main controller 19 and battery 18 are housed inside the base 1. The battery 18 is electrically connected to the various power-consuming components of the surface cleaning robot 100 to provide them with power. The main controller 19 is signal-connected to the various controllable components of the surface cleaning device 100 to control the automatic operation of the surface cleaning device 100.

[0046] Combination Figure 7 The robot housing 1 has a brush cavity 17 formed at its front. The brush cavity 17 has a left-side opening 171 and a right-side opening 172 facing each other, and a lower opening 173 extending between the left-side opening 171 and the right-side opening 172. A roller brush unit 5 is arranged in the brush cavity 17. The outer end of the first roller brush 51 and the second roller brush 52 protrude from the right-side opening 171 and the right-side opening 172, respectively, to clean the contact surfaces to be cleaned. In other embodiments, the brush cavity may also have only one side opening, with the outer end of one of the first and second roller brushes protruding from the corresponding side opening to clean the contact surfaces to be cleaned.

[0047] The fluid supply unit includes a supply tank 21 for storing cleaning fluid, a fluid distributor 24 disposed on the robot housing 1 and located in the brush chamber 17, a fluid pump 22 in fluid communication with the supply tank 21, and a fluid conduit 23 for fluid communication between the fluid distributor 24 and the supply tank 21. The supply tank 21 is located inside the base 1 and protrudes from the top wall 11 to replenish the supply tank with cleaning fluid. The fluid pump 22 is disposed inside the robot housing 1 and is used to provide the flow power for the cleaning fluid. The fluid distributor 24 is configured to extend from the left opening 171 to the right opening 172 in a left-right direction and has a plurality of dispensing nozzles 25, each of which is configured to face the roller brush unit 5 to simultaneously dispense cleaning fluid to the first roller brush 52 and the second roller brush 52.

[0048] The wastewater recovery unit includes a wastewater recovery tank 31 for storing wastewater, a suction motor 32 in fluid communication with the wastewater recovery tank 31, and a suction channel 33 connecting the wastewater recovery tank 31 and the brush chamber 17. Both the wastewater recovery tank 31 and the suction motor 32 are located inside the base 1. The wastewater recovery tank 31 is detachably connected to the base 1 and protrudes outward through the top wall 11 for the user to empty the wastewater. The inlet and outlet of the suction channel 33 are formed by a rear opening 34 (see below) and a wastewater recovery tank inlet 35, respectively. The wastewater recovery tank inlet 35 is located on the bottom wall 12 and configured to connect with the wastewater recovery tank 21.

[0049] like Figure 11As shown, on the robot housing 1, in the brush cavity 17, a first scraper 174, a rear opening 34, a second scraper 175, and a baffle plate 176 are arranged sequentially along the circumference, extending from the left opening 171 to the right opening 172 in the left-right direction. The front end of the first scraper 174 defines the rear boundary of the lower opening 173 and contacts the surface to be cleaned to prevent dirt from flowing backward out of the lower opening 173. The second scraper 175 is adjacent to the lower side of the fluid distributor 24 and the upper edge of the rear opening 34. The second scraper 175 extends into the brush cavity 17 and is configured to simultaneously abut against the first roller brush 51 and the second roller brush 52 to scrape away dirt and contaminants from the surfaces of the first bristles 513 and the second bristles 523. The baffle plate 176 is used to block liquid from flowing backward out of the first bristles. The cleaning fluid splashed out by the second bristles 513 and 523. The rear opening 34 is formed on the wall of the base 1 and is in fluid communication with the brush cavity 17 to collect the dirt in the brush cavity 17.

[0050] The working principle of the surface cleaning robot 100 is explained below: When the surface cleaning robot 100 performs cleaning operations, the main controller 19 controls the robot housing 1 to move autonomously on the surface to be cleaned and starts the fluid pump 22, motor 41, and suction motor 32 simultaneously or sequentially according to the program. The cleaning fluid in the supply tank 21, under the action of the fluid pump 22, partially reaches the fluid distributor 24 through the fluid pipeline 23, and is distributed to the first roller brush 51 and the second roller brush 52 by the various dispensing nozzles 25 on the fluid distributor 24. The motor 41 simultaneously drives the first roller brush 51 and the second roller brush 52 to rotate synchronously, and the first roller brush 51 and the second roller brush 52 use the cleaning fluid to clean the surface to be cleaned. The suction motor 32 creates a negative pressure at the wastewater recovery tank 31, in... Under this negative pressure, the dirt and debris on the surface to be cleaned, as well as the dirt and grime scraped off from the first bristles 513 and the second bristles 523 by the second scraper 175, enter the suction channel 35 through the rear opening 34 and are finally stored in the waste recovery tank 31.

[0051] Figure 12 The third type of surface cleaning apparatus provided by the present invention is shown—a surface cleaning device 200, which is a vertical cleaning device capable of moving on the surface to be cleaned. To avoid redundancy, the following description only focuses on the differences between the surface cleaning device 200 and the surface cleaning device 100.

[0052] The surface cleaning device 200 includes a housing 1' located at the lower part and an upright body 20' rotatably connected to the upper side of the housing 1'. A liquid supply tank (not shown in the figure) and a waste liquid recovery tank 31' are detachably connected to the upright body 20'. A suction motor 32' is located above the waste liquid recovery tank 31' and is in fluid communication with the waste liquid recovery tank 31'. Both the fluid conduit 23' and the waste liquid recovery conduit 33' are configured to extend from the interior of the upright body 20' to the interior of the housing 1', thereby achieving fluid communication between the liquid supply tank and the brush chamber 17, and between the waste liquid recovery tank 31' and the brush chamber 17, respectively.

[0053] The upper part of the upright body 20' is provided with a handle assembly 30' for the user to hold. The handle assembly 30' is provided with a control panel 40' that can control the operation of the surface cleaning equipment 200. The control panel 40' is not limited to the form of a switch, knob, or touch screen. The handle 30' allows the user to push the surface cleaning equipment 200 to move on the surface to be cleaned and operate the surface cleaning equipment 200 to perform cleaning operations.

[0054] The roller brush unit and base design of this solution can also be applied to horizontal surface cleaning equipment, portable handheld surface cleaning equipment, etc., which can clean the edges of the surface to be cleaned (such as the edge of a wall), so that users do not need to clean these edge areas twice, thereby improving cleaning efficiency.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope. The scope of protection of the present invention is defined by the appended claims, specification, and their equivalents.

Claims

1. A roller brush assembly for a surface cleaning device, comprising a first roller brush, a second roller brush, and a drive unit configured to simultaneously drive the first roller brush and the second roller brush to rotate, wherein the first roller brush includes a first sleeve having a first inner cavity and first bristles disposed on the outer peripheral wall of the first sleeve, and the second roller brush includes a second sleeve having a second inner cavity and second bristles disposed on the outer peripheral wall of the second sleeve; characterized in that, The drive unit includes a drive motor, at least partially housed in the first inner cavity and / or the second inner cavity; the drive motor is a dual-axis motor, with a first output shaft and a second output shaft respectively extending from its axial ends; the first output shaft is drivenly connected to a first roller brush, and the second output shaft is drivenly connected to a second roller brush; the rotation axes of the first and second roller brushes are collinear with the drive axis of the drive motor; the drive unit further includes a first reducer located in the first inner cavity and a second reducer located in the second inner cavity, the first reducer and the second reducer being drivenly connected to the first output shaft and the second output shaft respectively; The roller brush assembly further includes a motor housing, in which at least one drive motor is housed. At least a portion of the motor housing is located within the first inner cavity and / or the second inner cavity. The motor housing includes a connecting plate configured to assemble the roller brush assembly into a surface cleaning device. At least a portion of the connecting plate protrudes radially from the first and second roller brushes. The connecting plate has opposing first and second side surfaces. The inner end face of the first roller brush seals against the first side surface, and the inner end face of the second roller brush seals against the second side surface. The lengths of the first and second bristles are configured such that, when the first and second roller brushes rotate synchronously, the portion of the first bristle near the first side surface and the portion of the second bristle near the second side surface can intersect each other. The connecting plate is provided with a wire channel through which an electrical wire passes.

2. The roller brush assembly according to claim 1, characterized in that, The roller brush assembly further includes a first roller brush shaft located in the first inner cavity and driven to rotate by the first output shaft. The first roller brush is supported on the first roller brush shaft, and the first reducer is drivingly connected to the first output shaft and the first roller brush shaft.

3. The roller brush assembly according to claim 2, characterized in that, The first roller brush is detachably supported on the first roller brush shaft.

4. The roller brush assembly according to claim 1, characterized in that, The roller brush assembly further includes a second roller brush shaft located in the second inner cavity and driven to rotate by the second output shaft. The second roller brush is supported on the second roller brush shaft, and the second reducer is drivingly connected to the second output shaft and the second roller brush shaft.

5. The roller brush assembly according to claim 4, characterized in that, The second roller brush is detachably supported on the second roller brush shaft.

6. The roller brush assembly according to claim 1, characterized in that, The distance between the first side surface and the second side surface is configured to be less than 8 mm.

7. The roller brush assembly according to claim 1, characterized in that, The drive unit is centrally located on the roller brush assembly.

8. A surface cleaning device, comprising a housing movable on a surface to be cleaned and a roller brush assembly as described in any one of claims 1-7, wherein the housing is provided with a brush cavity and a suction channel in fluid communication with the brush cavity, the brush cavity having a lower opening at a connecting plate and at least one side opening, the roller brush assembly being mounted in the brush cavity and the lower portions of a first roller brush and a second roller brush protruding from the lower opening, and at least one of the outer ends of the first roller brush and the second roller brush protruding from the at least one side opening; wherein, The first bristles and the second bristles can cross each other and cover the lower opening.

9. The surface cleaning device according to claim 8, characterized in that, The brush cavity has a rear opening that is in fluid communication with the suction channel, and the rear opening faces both the first roller brush and the second roller brush.

10. The surface cleaning apparatus according to claim 9, characterized in that, The housing is provided with a second scraper for contact between the first and second roller brushes, and the second scraper is located at the upper edge of the rear opening.

11. The surface cleaning apparatus according to claim 8, characterized in that, The housing is provided with a first scraper for contacting the surface to be cleaned, and the first scraper defines the rear boundary of the lower opening.

12. The surface cleaning apparatus according to claim 8, characterized in that, The surface cleaning device is either an automatically movable robotic surface cleaning device or a push rod type surface cleaning device.

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