CN115413973A - Floor brush assembly for surface cleaning apparatus - Google Patents

Abstract

The present application relates to a floor brush assembly for a surface cleaning apparatus, the floor brush assembly comprising a housing, a roller brush assembly and a roller brush drive assembly; the rolling brush driving assembly comprises a motor assembly, a transmission assembly, a front driving shaft and a front driving part arranged on the front driving shaft; the shell is provided with a shell front part, a shell rear part, a first side part and a second side part, the rolling brush assembly at least comprises a first rolling brush, the shell front part is provided with a first rolling brush chamber, and the first rolling brush is arranged in the first rolling brush chamber; the front driving part comprises a first driving head and a second driving head, the first driving head and the second driving head are respectively arranged at two sides of the front driving shaft, and the first driving head is matched with the first rolling brush at one side of the first side part facing the first rolling brush chamber; the floor brush assembly further comprises a first side brush, and the second driving head is matched with the first side brush at one side of the first side part, which is far away from the first rolling brush chamber. The problem that in the prior art, the wall edge is not thoroughly cleaned can be solved, and the independent disassembly and assembly and replacement of the edge brush are more convenient.

Description

Floor brush assembly for surface cleaning apparatus

Technical Field

The application relates to the technical field of household appliances, in particular to a floor brush assembly for a surface cleaning device.

Background

Surface cleaning apparatus such as floor washers are used as cleaning appliances, in which a roller brush is usually detachably mounted in a floor brush assembly, and the roller brush is detached from the floor brush assembly for replacement or manual cleaning when the roller brush needs to be replaced or cleaned.

Among the prior art, in order to guarantee the high-speed pivoted steadiness of round brush, need all with the both sides of round brush and the lateral wall fixed mounting in the round brush room of scrubbing brush subassembly, however above-mentioned mounting means because the interval broad between the casing lateral wall of round brush tip and scrubbing brush subassembly for the round brush hair is bigger apart from the wall distance when cleaning the wall, can not clear up the wall well.

In order to solve the above problems, in some prior arts, an edge brush is additionally arranged on the rolling brush assembly, and the edge brush is exposed out of the side wall of the casing of the floor brush assembly through arranging part of bristles, so that the aim of cleaning the wall edge is fulfilled. Although partial problems can be solved by the mode, the problem that the wall edge cannot be thoroughly cleaned still exists because the side wall of the shell is exposed only through the partial inclination of the side brush, and the side brush is arranged on the rolling brush assembly, so that the side brush assembly is not beneficial to dismounting and mounting of the rolling brush assembly and the thickness of the end cover of the rolling brush is large.

Disclosure of Invention

In view of the above, there is a need to provide a floor brush assembly for a surface cleaning apparatus to solve the above-mentioned problem of difficult cleaning of the wall edge.

In order to achieve the above object, the present invention provides a floor brush assembly for a surface cleaning apparatus, the floor brush assembly including a housing, a roll brush assembly, and a roll brush driving assembly; the rolling brush driving assembly comprises a motor assembly, a transmission assembly, a front driving shaft and a front driving part arranged on the front driving shaft; the shell is provided with a shell front part, a shell rear part, a first side part and a second side part, the rolling brush assembly at least comprises a first rolling brush, the shell front part is provided with a first rolling brush chamber, and the first rolling brush is arranged in the first rolling brush chamber; the front driving part comprises a first driving head and a second driving head, the first driving head and the second driving head are respectively arranged at two sides of the front driving shaft, and the first driving head is matched with the first rolling brush at one side of the first side part facing the first rolling brush chamber; the floor brush assembly further comprises a first side brush, and the second driving head is matched with the first side brush at one side of the first side part, which is far away from the first rolling brush chamber.

Preferably, the first side brush is at least largely exposed outside the first side portion of the housing.

Preferably, the first side brush comprises a brush holder and bristles mounted on the brush holder, and the brush holder is at least mostly exposed outside the first side portion of the housing.

Preferably, the bristles are all exposed outside the first side of the housing.

Preferably, the first side brush and the first rolling brush rotate in the same direction.

Preferably, an elastic bumper strip is convexly arranged on the outer side wall of the first side part.

Preferably, the elastic bumper strip extends along the front-rear direction of the outer side wall of the first side portion, and the maximum setting thickness of the elastic bumper strip along the axial direction of the first rolling brush is substantially equal to or slightly larger than the maximum distance between the first side brush and the first side wall.

Preferably, the first side brush is detachably mounted on the second drive head.

Preferably, the first side brush is detachably mounted on the second driving head by a screw structure having a screw direction opposite to an operation direction of the first roll brush.

Preferably, the first side brush is detachably mounted on the second driving head through magnetic attraction or an elastic buckle.

Preferably, the bottom of the housing includes a bottom plate, and the first fluid recovery passage is disposed in the housing adjacent to the first roll brush.

Preferably, the bottom plate is provided with an anti-backflow plate which can be selectively matched with the first rolling brush, and the anti-backflow plate can swing or deform under the influence of suction force when the floor brush assembly works.

Preferably, the backflow prevention plate is formed within the first suction port of the first fluid recovery channel.

Preferably, the anti-backflow plate can swing or deform to an operating state forming a larger gap with the first rolling brush under the influence of suction force when the floor brush assembly works, and can be in an anti-backflow state with the gap between the anti-backflow plate and the first rolling brush smaller than the gap in the operating state when the floor brush assembly is in a non-operating state.

Preferably, the backflow preventing plate forms a sealing contact state with the first roll brush in a non-operating state.

Preferably, the backflow prevention plate includes a fixed end fixedly connected to the bottom plate of the housing and a free end extending upward toward a direction of the first round brush, the free end having a height higher than a height of the fixed end in a vertical direction.

Preferably, a first wiper strip is provided on the base plate behind the first roller brush toward the surface to be cleaned, the first wiper strip being opposed to the first roller brush with a gap therebetween forming a first suction port into a first fluid recovery passage provided in the housing.

Preferably, the first scraping strip is arranged to extend in the same direction as the axial direction of the first rolling brush, and the length of the first scraping strip is longer than that of the first rolling brush.

Preferably, at least a part of the end of the first scraping bar is exposed outside the first side of the casing, and the length of the part of the end of the first scraping bar exposed outside the first side may be set to be substantially equal to or slightly greater than the maximum distance between the first side brush and the first side wall.

Preferably, a first buffer portion is disposed in the first fluid recycling channel and opens to the first outlet of the first fluid recycling channel.

Preferably, the first buffer portion is provided as an annular tube that obliquely protrudes from an inner wall of the first fluid recovery passage toward the first outlet direction.

Preferably, the rolling brush assembly further comprises a second rolling brush, a second rolling brush chamber is arranged at the rear part of the shell, and the second rolling brush is arranged in the second rolling brush chamber; the housing further includes a primary fluid recovery channel and a secondary fluid recovery channel disposed within the housing and adjacent to the second roller brush.

Preferably, the first outlet of the first fluid recovery passage and the second outlet of the second fluid recovery passage are in fluid communication with the inlet of the primary fluid recovery passage.

Preferably, the maximum cross-sectional area of the first fluid recovery channel is greater than the maximum cross-sectional area of the second fluid recovery channel.

Preferably, the maximum cross-sectional area of the first fluid recovery channel is S1 and the maximum cross-sectional area of the second fluid recovery channel is S2, wherein 2 < S1/S2 ≦ 10, preferably 5 < S1/S2 ≦ 10.

Preferably, the first fluid recovery passageway is disposed on a front side of the primary fluid recovery passageway and is disposed substantially horizontally from the first suction opening to the first outlet.

Preferably, the inlet of the primary fluid recovery channel is arranged to smoothly interface with the first outlet of the first fluid recovery channel, and the primary fluid recovery channel extends obliquely upwardly and rearwardly from the inlet to the outlet.

Preferably, the main fluid recovery channel is rearwardly opened with a guide duct, an outlet of the guide duct is provided on a rear side wall of the main fluid recovery channel, an inlet of the guide duct is fluidly connected to the second outlet of the second fluid recovery channel, and the guide duct is inclined downwardly and rearwardly from the outlet to the inlet.

Preferably, the second lower wall surface is provided with at least one wedge-shaped projection, the inclined side of which is arranged close to the second suction side, and the blocking side of which cooperates with the substantially horizontal section of the second lower wall surface to form a second buffer which prevents undesired backflow.

Preferably, the second suction opening of said second fluid recovery passageway is disposed adjacent to but not within the second rolling brush chamber.

Preferably, the second suction opening comprises at least a second suction opening front wall and a second suction opening rear wall.

Preferably, a third scraping strip facing the surface to be cleaned is fixedly arranged in the second suction opening; the second suction opening is divided into two mutually independent suction openings by the third scraping strip, namely a second front suction opening formed by the front wall of the second suction opening and the third scraping strip and a second rear suction opening formed by the rear wall of the second suction opening and the third scraping strip.

Preferably, the third scraping bar is provided with a free end opposite to the surface to be cleaned and a fixed end opposite to the free end of the third scraping bar and used for installing the third scraping bar; the free end is positioned and dimensioned to have an amount of interference or clearance with the surface to be cleaned that enables a scraping action to be achieved.

Preferably, the free end of the front wall of the second suction opening and/or the rear wall of the second suction opening is spaced further from the surface to be cleaned than the free end of the third wiping strip.

Preferably, the second front suction opening is disposed in a direction away from the second rolling brush, and the second rear suction opening is disposed in a direction close to the second rolling brush; the second rear suction opening has a larger cross-sectional area than the second front suction opening.

Preferably, the third scraping strip is made of a soft material, when the floor brush assembly moves forwards, the free end of the third scraping strip is stressed to bend backwards, the sectional area of the second front suction opening is increased, the sectional area of the second rear suction opening is decreased, and the second front suction opening forms a main suction opening; when the floor brush component moves backwards, the free end of the third scraping strip is stressed to bend towards the front side, the sectional area of the second front suction opening is reduced, the sectional area of the second rear suction opening is increased, and the second rear suction opening forms a main suction opening.

Preferably, the first rolling brush chamber and the second rolling brush chamber respectively comprise a first rolling brush chamber upper cover and a second rolling brush chamber upper cover; one end of the first rolling brush chamber upper cover is provided with a front swing blocking piece, and one end of the second rolling brush chamber upper cover is provided with a rear swing blocking piece.

Preferably, the front swing block comprises a front block plate, a front rotary shaft, at least one front contact rotary protrusion receiving a frictional force from a surface to be cleaned to rotatably actuate the front block plate; and/or the rear swing check member includes a rear check plate, a rear rotation shaft, and at least one rear contact rotation protrusion receiving a frictional force from the surface to be cleaned to rotatably operate the rear check plate.

Preferably, the front blocking plate is disposed in a front and parallel arrangement with respect to the first roll brush, and selectively blocks the front contaminants from entering the first fluid recovery channel; the rear blocking plate is arranged behind and in parallel with respect to the second roller brush and selectively blocks rear dirt from entering the second fluid recovery channel.

Preferably, the front blocking plate is rotatable between a closed position substantially perpendicular to the surface to be cleaned and an open position in contact engagement with the first roller brush, and the rear blocking plate is rotatable between a closed position substantially perpendicular to the surface to be cleaned and an open position in contact engagement with the second roller brush.

Preferably, when the floor brush assembly is pushed forwards, the blocking plate of the front swing blocking member rotates to the opening position, and the blocking plate of the rear swing blocking member rotates to the closing position.

Preferably, the front contact rotation protrusion is at least partially provided at a front side of the blocking plate; the rear contact rotating projection is at least partially disposed at a rear side of the blocking plate.

Preferably, the front contact rotation protrusion and/or the rear contact rotation protrusion are made of a soft material and are arranged in a hollow fan shape.

Above-mentioned a scrubbing brush subassembly for surface cleaning equipment is owing to change and adopt dual drive head simultaneous drive round brush and limit brush to avoid the too big dismouting scheduling problem that brings of size of round brush subassembly, can with the basically whole settings of limit brush outside the lateral part of scrubbing brush subassembly, solve the not thorough problem of prior art wall limit clearance, and make things convenient for the independent dismouting change of limit brush.

In addition, multiple backflow prevention structures are arranged in the fluid recovery channels arranged in front of and behind the floor brush assembly, so that the situation that undesirable fluid flows back to the surface to be cleaned when the floor brush assembly is stopped is fully avoided.

Drawings

FIG. 1 is a schematic diagram of a surface cleaning apparatus in one embodiment;

FIG. 2 is a schematic structural diagram of the outer shape of the floor brush assembly in one embodiment;

FIG. 3 is a schematic cross-sectional view of a floor brush assembly according to one embodiment;

FIG. 4 is a schematic sectional view of a floor brush assembly in an embodiment taken along the axial direction of a roller brush;

FIG. 5 is a schematic view of the connection of the brush drive assembly according to one embodiment;

FIG. 6 is a cross-sectional view of a brush drive assembly according to one embodiment;

FIG. 7 is a schematic diagram of a first edge brush in one embodiment;

FIG. 8 is a schematic view of a first roll brush in one embodiment;

FIG. 9 is a schematic view of the construction of one embodiment of a roller brush locking end cap;

FIG. 10 is a schematic view of another angle of the floor brush assembly of one embodiment;

FIG. 11 is a schematic view of a brush assembly of an embodiment;

FIG. 12 is a schematic cross-sectional view of another embodiment of a floor brush assembly;

FIG. 13A is an enlarged partial view of the position A of FIG. 12 showing the anti-drainback plate in a non-operational state;

FIG. 13B is a partially enlarged view of the position A of FIG. 12 showing the anti-drainback plate in an operating state;

FIG. 14 is a schematic view of a first buffer portion according to an embodiment;

FIG. 15 is a schematic view in partial cross-section of a top view of a brush assembly according to one embodiment;

FIG. 16 is a schematic bottom view of a portion of the structure of a brush assembly in accordance with one embodiment;

FIG. 17 is a schematic view of a second wiper strip according to one embodiment;

FIG. 18A is an enlarged partial view of the third wiper strip in the inactive position at position B in FIG. 12;

FIG. 18B is an enlarged view of a portion of the third wiper strip of FIG. 12 at position B in a forward position of the floor brush assembly;

FIG. 18C is an enlarged partial view of the third wiper strip of FIG. 12 in position B in a rear-pull operating condition of the floor brush assembly;

FIG. 19 is a schematic view showing the assembly and disassembly of the upper lid of the roll brush chamber in one embodiment;

FIG. 20A illustrates an exemplary embodiment of the movement of the oscillating stop in a forward pushing mode of the brush assembly;

FIG. 20B is a schematic view of the motion of the oscillating stop in an exemplary back-pull operating condition of the floor brush assembly;

FIG. 21 is a schematic bottom view of the floor brush assembly in one embodiment;

FIG. 22 is a schematic view of a water spray channel of the surface cleaning apparatus in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

The following references to "front", "rear", "upper", "lower", "left" and "right" are directions as viewed from the operator standing at the rear of the surface cleaning apparatus, looking forward when the surface cleaning apparatus is normally operated.

In embodiments of the present invention, the floor brush assembly may be used in surface cleaning apparatus including, but not limited to, hand-held washing machines, hand-held vacuum cleaners, and the like.

Fig. 1 is a schematic structural diagram of a surface cleaning apparatus provided in an embodiment of the present invention, in the embodiment, taking the cleaning apparatus as a washing machine as an example, the cleaning apparatus includes a floor brush assembly, a body 100 and a floor brush assembly 200 mounted on the body 100 and adapted to move on a surface to be cleaned; a cleaning liquid barrel 400; a power plant; a suction nozzle disposed on the floor brush assembly 200 and in fluid communication with the power plant; and a recycling bin 300. Of course, the main body 200 may also be provided with a control system for controlling other functions of the cleaning device, which will not be described in detail herein.

2-22, a floor brush assembly 200 for a surface cleaning apparatus, the floor brush assembly 200 comprising a housing 1, a roller brush drive assembly 2 and a roller brush assembly 3; the brush roll assembly 3 comprises a first brush roll 31 and a second brush roll 32, the housing 1 has a housing front 11, a housing rear 12, a first side 13 and a second side 14, the housing front 11 is provided with a first brush roll chamber 6, and the housing rear 12 is provided with a second brush roll chamber 7. The first rolling brush 31 is provided in the first rolling brush chamber 6, and the second rolling brush 32 is provided in the second rolling brush chamber 7. A main fluid recovery passage 16, a first fluid recovery passage 17 and a second fluid recovery passage 18 are provided in the housing 1.

As shown in fig. 5-6, the roller brush driving assembly 2 includes a motor assembly 21, a transmission assembly 22, a front driving shaft 23, a front driving portion 24 provided on the front driving shaft 23, a rear driving shaft, and a rear driving portion provided on the rear driving shaft.

The front driving part 24 includes a first driving head 241 and a second driving head 242, the first driving head 241 and the second driving head 242 are respectively provided at both sides of the front driving shaft 23, and the first driving head 241 is engaged with the first rolling brush 31 at a side of the first side part 13 facing the first rolling brush chamber 6.

The rear drive comprises a third drive head 27, which third drive head 27 cooperates with a second roller brush 32 on the side of the first side 13 facing the second roller brush chamber 7.

The transmission assembly 22 includes, but is not limited to, a belt transmission, a gear transmission, etc., and the belt transmission is illustrated in the present embodiment.

The motor assembly 21 may be a single motor that drives the front driving shaft 23 and the rear driving shaft to rotate synchronously and reversely through a transmission assembly 22, such as a belt transmission, or two motors that drive the front driving shaft 23 and the rear driving shaft to rotate reversely.

The floor brush assembly 200 further comprises a first side brush 4, and the second driving head 242 is engaged with the first side brush 4 at a side of the first side portion 13 away from the first rolling brush chamber 6.

The first side brush 4 is at least mostly exposed out of the first side portion 13 of the housing 1, the first side brush 4 includes a brush holder 41 and bristles 42 mounted on the brush holder 41, the brush holder 41 is at least mostly exposed out of the first side portion 13 of the housing 1, and the bristles are all exposed out of the first side portion 13 of the housing 1. The cleaning effect of wall limit is improved to the maximize under the prerequisite of guaranteeing that the installation is firm in the first side brush 4 of above-mentioned setting.

The maximum diameter of the first side brush 4 is preferably set to be larger than the maximum diameter of the first rolling brush 31, and at least a part of the brush hairs are preferably inclined in a direction away from the first side portion 13, so that when the floor brush assembly 200 moves to the vicinity of the wall, the contact with the wall can be realized, and the risk that the casing of the floor brush assembly 200 touches the wall is reduced.

The brush holder 41 of the first side brush 4 and the first rolling brush 31 are rotatably disposed on the front driving shaft 23 by the second driving head 242 and the first driving head 241, respectively, and the first side brush 4 and the first rolling brush 31 are rotated in the same direction.

The first side brush 4 is detachably mounted on the second driving head 242, for example, the first side brush 4 is detachably mounted on the second driving head 242 through a screw structure, the screw direction of the screw structure is opposite to the working direction of the first rolling brush 31, and the screw structure is arranged in a reverse direction so that the screw structure is tighter and tighter when the first rolling brush 31 works, and cannot be easily loosened from the second driving head 242.

Or the first side brush 4 is detachably mounted on the second driving head 242 through magnetic attraction or an elastic buckle, and the above arrangement can achieve the purpose of facilitating the disassembly and assembly.

Specifically, an elastic bumper strip 131 is convexly arranged on the outer side wall of the first side portion 13, and the maximum setting thickness of the elastic bumper strip 131 along the axial direction of the first rolling brush 31 is substantially equal to or slightly larger than the maximum distance between the first side brush 4 and the first side wall; the arrangement can avoid the phenomenon that the first edge brush 4 exposed outside the first side part 13 of the shell 1 is stuck due to objects such as too close to the wall edge or furniture when the wall corner is cleaned.

The elastic bumper strip 131 extends along the front-rear direction of the outer side wall of the first side portion 13, and the cross section of the elastic bumper strip in the thickness direction is designed to be in an arc surface or spherical surface shape, so that the risk of damaging furniture or walls is reduced when the floor brush assembly 200 works; the elastic bumper strip 131 may be one or more, and certainly, the elastic bumper strip does not necessarily extend in the front-back direction, so long as the elastic bumper strip can achieve the similar effects as described above.

As shown in fig. 8 to 11, the first rolling brush 31 includes a rolling brush cylinder 310 and a bristle layer 311, a rolling brush driving end cap 312, and a rolling brush locking end cap 313. The round brush barrel 310 is hollow tubular structure, and its outside parcel has brush hair layer 311, and brush hair layer 311 parcel is on the whole periphery surface of round brush barrel 310, and when round brush barrel 310 used self axis of rotation 314 to rotate as the center, it carries out circumferential direction to drive brush hair layer 311 simultaneously, and brush hair layer 311 can carry out rolling contact with treating clean surface to treat clean surface and clean.

The rolling brush driving end cap 312 is fixedly connected to one end of the rolling brush cylinder 310, and seals one end of the rolling brush cylinder 310. The rolling brush driving end cap 312 is a cylinder, and a driving groove 315 is disposed on an end surface of the rolling brush driving end cap facing away from the rolling brush cylinder 310, and a plurality of engaging structures 316 are disposed on an inner circumferential surface of the driving groove 315.

The first driving head 241 can be inserted into the driving recess 315, and the outer peripheral surface thereof is engaged with the engaging structure 316 on the inner peripheral surface of the driving recess 315, and the first driving head 241 can be, but not limited to, a spline, so that the spline is engaged with the driving recess 315, and when the motor works, the spline drives the first rolling brush 31 to rotate.

The rolling brush locking end cover 313 is fixedly connected to the other end of the rolling brush cylinder body 310, and seals the other end of the rolling brush cylinder body 310. The brush locking end cap 313 may include a brush locking end cap body 317 and a brush releasing portion 318 rotatably coupled to one side end surface of the brush locking end cap body 317. The roller-brush locking end cap body 317 has a cylindrical shape as a whole, and the roller-brush releasing portion 318 may have a specific shape suitable for a user's folding operation.

When the first rolling brush 31 is mounted on the floor brush assembly 200, the driving end of the rolling brush driving assembly 2 in the floor brush of the floor washing machine can be inserted into the driving groove 315, the outer circumferential surface of the first driving head 241 of the rolling brush driving assembly 2 is engaged with the clamping structure 316 on the inner circumferential surface of the driving groove 315, and the rolling brush releasing part 318 of the rolling brush locking end cover 313 is locked on the second side part 14 of the floor brush assembly 200, so that the successful mounting and locking of the first rolling brush 31 is realized; when the first rolling brush 31 needs to be removed, the user only needs to activate the rolling brush releasing portion 318 to unlock the first rolling brush 31 and then draw out the first rolling brush 31 in a direction away from the second side portion 14 to remove the first rolling brush 31.

Preferably, a second side brush 5 is also disposed on the second side portion 14 of the floor brush assembly 200, in order to facilitate the installation of the second side brush 5, a groove is disposed on an end surface of the rolling brush locking end cover main body 317 facing away from the rolling brush cylinder body 310, and similarly, the second side brush 5 includes a brush holder 51 and bristles 52 mounted on the brush holder 51, a locking structure detachably engaged with the groove is disposed on the brush holder 51, the brush holder 51 is at least mostly exposed outside the second side portion 14 of the casing 1, and the bristles 52 are all exposed outside the second side portion 14 of the casing 1.

Similarly, an elastic bumper strip 141 is convexly arranged on the outer side wall of the second side portion 14, and the maximum arrangement thickness of the elastic bumper strip 141 along the axial direction of the first rolling brush 31 is substantially equal to or slightly larger than the maximum distance between the second side brush 5 and the second side wall; the arrangement can avoid the phenomenon that the second side brush 5 exposed out of the second side part 14 of the shell 1 is stuck due to the fact that the second side brush is too close to objects such as wall edges or furniture and the like when the corner is cleaned.

Similarly, the elastic bumper strip 141 extends along the front-rear direction of the outer side wall of the second side portion 14, and the cross section of the elastic bumper strip in the thickness direction is designed to be in the shape of a circular arc surface or a spherical surface, so that the risk of damaging furniture or a wall is reduced when the floor brush assembly 200 works; the elastic bumper strip 141 may be provided as one or more strips, which are not necessarily extended in the front-back direction, as long as the similar effects can be achieved.

As shown in fig. 12-13B, the bottom of the housing 1 includes a bottom plate 15, and a first fluid recovery channel 17 is disposed in the housing 1 and adjacent to the first rolling brush 31; be provided with a selectivity and first round brush 31 complex anti-return board 91 on the bottom plate 15, anti-return board 91 can receive the suction effect when scrubbing brush subassembly 200 is worked and swing or warp to and form the operating condition in great clearance between the first round brush 31 to do not influence large granule rubbish and get into first fluid recovery passageway 17, anti-return board 91 can be in when scrubbing brush subassembly 200 is in non-operating condition with the smaller anti-return state in clearance of operating condition in clearance between the first round brush 31, preferably anti-return board 91 forms the sealed contact state with first round brush 31 when non-operating condition, and the clearance equals about zero, thereby can avoid unexpected fluid backward flow to cause the secondary pollution of treating the clean surface after surface cleaning equipment shuts down.

The backflow preventing plate 91 is formed in the first suction port 171 of the first fluid recovery passage 17, and preferably a fixed end of the backflow preventing plate 91 is fixedly connected to the bottom plate 15 of the housing 1, and a free end thereof extends upward in a direction toward the first roll brush 31 to ensure that the free end is higher than a height of the fixed end in a vertical direction, thereby making it possible to prevent undesired fluid from flowing back to the first suction port 171 and being discharged after the surface cleaning apparatus is stopped.

The anti-backflow plate 91 may be configured in a planar shape or a curved shape or a shape composed of multiple sections of planar or curved surfaces, as long as the free end thereof can be configured to be higher than the vertical height of the fixed end. In this embodiment, the anti-backflow plate 91 is a broken line plate formed by two sections of planes, the plane section where the fixed end is located is preferably set to be made of a relatively rigid material and integrally or detachably connected to the bottom plate 15, the plane section where the free end is located is preferably set to be made of a relatively soft material, and the plane section which is deformable or made of a relatively rigid material can swing.

A first buffer portion 173 is disposed in the first fluid recovery passageway 17 and opens towards the first outlet 172 of the first fluid recovery passageway 17, the first buffer portion 173 does not interfere with the movement of the fluid entering from the first suction opening 171 towards the first outlet 172 of the first fluid recovery passageway 17, and can store a portion of the fluid returning from the first outlet 172 of the first fluid recovery passageway 17 towards the first suction opening 171, thereby reducing secondary contamination of the surface to be cleaned caused by unwanted fluid returning after the surface cleaning apparatus is shut down.

As shown in fig. 14, the first fluid recovery channel 17 is formed as a pipe, the pipe is arranged to be substantially horizontal, and the first buffer portion 173 is preferably arranged as a ring pipe protruding from the inner wall of the pipe in an inclined manner toward the first outlet 172, and may be arranged adjacent to the first fluid recovery channel 17 near the first suction port 171.

A first scraper bar 92 may be provided on the base plate 15 behind the first roller brush 31 toward the surface to be cleaned, the first scraper bar 92 having a free end contactable with the surface to be cleaned and a fixed end opposite to the free end of the first scraper bar 92 for mounting the first scraper bar 92; the first scraper bar 92 is opposed to the first roll brush 31 with a gap therebetween forming a first suction port 171 into a first fluid recovery passage 17 provided in the casing 1; and the free end of the first scraping strip 92 is positioned and sized so as to have an interference or clearance with the surface to be cleaned, which can achieve a scraping effect (i.e., a scraping effect for sweeping solid or liquid waste, the same applies below).

In this application embodiment, will in order to realize the firm installation of first scraping strip 92 on bottom plate 15, then be provided with the scraping strip installation department, and with the relative stiff end of first scraping strip 92 of the free end of first scraping strip 92 passes through the scraping strip installation department is installed on bottom plate 15, the scraping strip installation department specifically can select to form or adopt other fixed knot to construct for the firm installation with base body one-piece manufacturing.

Further, in the embodiment of the present application, the material of the first scraping strip 92 is a soft material (silicone, rubber, etc.); an interference range capable of realizing dust scraping action is formed between the free end of the first scraping strip 92 and the surface to be cleaned, namely the free end of the first scraping strip 92 is designed to be slightly longer, so that the free end can be always attached to the ground during working; correspondingly, if the material of the first scraping strip 92 is a non-soft material, there is a gap between the free end of the first scraping strip 92 and the surface to be cleaned, that is, the free end of the first scraping strip 92 is designed to be slightly shorter, it should be noted that the gap is small, which enables the airflow formed in the first suction port 171 to have the airflow flow rate as high as possible, thereby improving the cleaning efficiency and preventing the free end of the first scraping strip 92 from being damaged.

If the material of the first scraping strip 92 is selected to be a soft material, the free end of the first scraping strip 92 has three states, and when the floor brush assembly 200 is at rest, the free end of the first scraping strip 92 is substantially perpendicular to the surface to be cleaned; when the floor brush assembly 200 moves forward, the free end of the first scraping bar 92 is forced to bend backward, and the cross-sectional area of the first suction port 171 increases; when the floor brush assembly 200 moves backward, the free end of the first scraping bar 92 is forced to bend to the front side, and the sectional area of the first suction port 171 decreases; and the first suction opening 171 has a reduced cross-sectional area in such a manner that the first scraping bar 92 forms a transitional slope with the surface to be cleaned, so that the airflow generated by the first suction opening 171 can directly suck impurities such as dust, sewage and the like into the first fluid recovery passageway 17.

As shown in fig. 15, the first scraping bar 92 is disposed to extend in the same direction as the axial direction of the first rolling brush 31, and the length thereof is set to be greater than the length of the first rolling brush 31, that is, at least a part of the end of the first scraping bar 92 is exposed outside the first side portion 13 of the housing 1, preferably, the length of the part of the end of the first scraping bar 92 exposed outside the first side portion 13 may be set to be substantially equal to or slightly greater than the maximum distance between the first side brush 4 and the first side wall, so as to ensure that the garbage and the like cleaned by the first side brush 4 can be scraped by the part of the end of the first scraping bar 92 and sucked into the first fluid recovery channel 17 through the first suction port 171. More preferably, the maximum distance between the first side brush 4 and the first side wall is less than or equal to the length of the part of the end portion of the first scraping bar 92 exposed outside the first side portion 13, and the length of the part of the end portion of the first scraping bar 92 exposed outside the first side portion 13 is less than or equal to the maximum set thickness of the elastic bumper strip 131 on the first side portion 13 in the axial direction of the first rolling brush 31.

Also, at least a portion of the end of the first scraping strip 92 is exposed outside the second side portion 14 of the housing 1, and preferably, the length of the portion of the end of the first scraping strip 92 exposed outside the second side portion 14 may be set to be substantially equal to or slightly greater than the maximum distance between the second side brush 5 and the second side wall, so as to ensure that the garbage and the like cleaned by the second side brush 5 can be scraped by the portion of the end of the first scraping strip 92 and sucked into the first fluid recovery passageway 17 through the first suction port 171.

The first rolling brush chamber 6 is further provided with a second scraping strip 93 which has an interference effect with the first rolling brush 31, the second scraping strip 93 is used for scraping off the excessive fluid on the first rolling brush 31, and can be arranged at the front end of the first rolling brush chamber 6 relative to the first rolling brush 31 or at the upper end of the first rolling brush 31 and close to the first fluid recovery channel 17, in this embodiment, the second scraping strip 93 is selectively arranged at the upper end of the first rolling brush chamber 31 and close to the first fluid recovery channel 17, and the arrangement can be more beneficial to recovering the scraped excessive fluid. Advantageously, as shown in fig. 17, the second scraping bar 93 may be provided with a comb structure to facilitate the cleaning of the hairs and the like on the first rolling brush 31.

As shown in fig. 12 and fig. 18A to 18C, the housing 1 further includes a main fluid recovery passage 16 and a second fluid recovery passage 18, the second fluid recovery passage 18 being provided in the housing 1 adjacent to the second roll brush 32; except that the second suction opening 181 of the second fluid recovery passage 18 is disposed adjacent to the second rolling brush chamber 7 but not in the second rolling brush chamber 7.

The first outlet 172 of the first fluid recovery passage 17 and the second outlet 182 of the second fluid recovery passage 18 are in fluid communication with the inlet 161 of the primary fluid recovery passage 16. Since most of the solid and liquid waste will be cleaned during the forward movement of the surface cleaning apparatus, if the first fluid recovery passage 17 and the second fluid recovery passage 18 are configured to be substantially the same, the suction force of the following second fluid recovery passage 18 will be wasted, and therefore, in this embodiment, the maximum cross-sectional area of the first fluid recovery passage 17 is preferably larger than the maximum cross-sectional area of the second fluid recovery passage 18, so that the floor brush assembly 200 can suck relatively more solid and/or liquid waste through the first roller brush 31 and the first fluid recovery passage 17 for the main cleaning function, and the second roller brush 32 and the second fluid recovery passage 18 can suck relatively less solid and/or liquid waste.

In some embodiments, the maximum cross-sectional area of the first fluid recycling channel 17 is S1, and the maximum cross-sectional area of the second fluid recycling channel 18 is S2, wherein 2 < S1/S2 ≦ 10, preferably 5 < S1/S2 ≦ 10, so that the overall cleaning effect of the floor brush assembly 200 may be maximized without affecting the cleaning efficiency.

The first fluid recovery passageway 17 is disposed at the front side of the main fluid recovery passageway 16 and may be disposed substantially horizontally from the first suction port 171 to the first outlet 172, and in order to ensure smooth flow of fluid flowing in from the first outlet 172 of the first fluid recovery passageway 17, the inlet 161 of the main fluid recovery passageway 16 and the first outlet 172 of the first fluid recovery passageway 17 are disposed in smooth abutment and extend obliquely upward and rearward from the inlet 161 to the outlet 162.

As shown in fig. 12, the second fluid recovery channel 18 is disposed at the rear side of the main fluid recovery channel 16, in order not to affect the fluid recovery smoothness of the first fluid recovery channel 17, a guide duct 163 is disposed at the rear side wall of the main fluid recovery channel 16, an outlet of the guide duct 163 is disposed at the rear side wall of the main fluid recovery channel 16, an inlet of the guide duct 163 is fluidly connected to the second outlet 182 of the second fluid recovery channel 18, and the guide duct 163 extends obliquely downward and rearward from the outlet to the inlet. With this arrangement, although the small amount of fluid flowing into the main fluid recovery passage 16 from the second fluid recovery passage 18 is not smoothly butted against each other, the large amount of fluid flowing into the main fluid recovery passage 16 from the first fluid recovery passage 17 having a larger suction force can be smoothly recovered into the recovery bucket.

As shown in fig. 18A to 18C, the second fluid recovery channel 18 includes a second upper wall 183 and a second lower wall 184, and a rear half section of the second lower wall 184, which is in butt joint with the guide pipeline 163, is set to be substantially horizontal, so that fluid can conveniently circulate in the second fluid recovery channel 18, and the cleaning efficiency is improved.

The connection section of the second lower wall 184 and the second suction opening 181 is provided with at least one protrusion 185, the protrusion 185 is preferably provided in a wedge shape, the inclined side of the wedge-shaped protrusion 185 is provided close to the second suction opening 181 side, the angle and height are set so as not to affect the fluid suction, and the blocking side of the protrusion 185 cooperates with the substantially horizontal section of the second lower wall 184 to form a second buffer portion that prevents the occurrence of undesired backflow.

The second suction opening 181 at least comprises a second suction opening front wall 1811 and a second suction opening rear wall 1812, and is preferably formed by enclosing the second suction opening front wall 1811 and the second suction opening rear wall 1812, a third scraping strip 94 facing to the surface to be cleaned is fixedly arranged in the second suction opening 181, the third scraping strip 94 is provided with a free end capable of contacting with the surface to be cleaned, and a fixed end opposite to the free end of the third scraping strip 94 and used for installing the third scraping strip 94; and the free end of the third wiper strip 94 is positioned and dimensioned to have an amount of interference or clearance with the surface to be cleaned that enables the wiping action.

The third scraping bar 94 is arranged to divide the second suction opening 181 into two suction openings which are independent of each other, namely a second front suction opening which is formed by enclosing the second suction opening front wall 1811 and the third scraping bar 94, and a second rear suction opening which is formed by enclosing the second suction opening rear wall 1812 and the third scraping bar 94; when the floor brush assembly 200 is pushed forward, the waste is sucked into the second fluid recovery passage 18 mainly through the second front suction opening formed by the second suction opening front wall 1811 and the third wiper strip 94; when the floor brush assembly 200 is pulled backward, the garbage is sucked into the second fluid recovery passage 18 mainly through the second rear suction opening formed by the second suction opening rear wall 1812 and the third wiper strip 94. The arrangement can prevent the scraping strip from being arranged on one side of the suction port, and the scraping strip can become an obstacle which is not beneficial to garbage entering the suction port channel when the scrubbing brush assembly 200 moves to one side of the scraping strip.

Further, in the embodiment of the present application, the material of the third scraping bar 94 is a soft material (silica gel, rubber, etc.); an interference range capable of realizing dust scraping action is formed between the free end of the third scraping strip 94 and the surface to be cleaned, namely the free end of the third scraping strip 94 is designed to be slightly longer, so that the free end can be always attached to the ground during working; correspondingly, if the third wiper strip 94 is made of a non-soft material, a gap which can achieve a dust wiping effect is formed between the free end of the third wiper strip 94 and a surface to be cleaned, that is, the free end of the third wiper strip 94 is designed to be slightly shorter, it should be noted that the gap is very small, so that the air flow formed in the second suction port 181 has an air flow speed as large as possible, which can improve the cleaning efficiency and prevent the free end of the third wiper strip 94 from being damaged.

If the material of the third scraping bar 94 is selected to be a soft material, the free end of the third scraping bar 94 has three states, and when the floor brush assembly 200 is at rest, the free end of the third scraping bar 94 is substantially perpendicular to the surface to be cleaned; when the floor brush assembly 200 moves forward, the free end of the third scraping bar 94 is forced to bend backward, the sectional area of the second front suction opening is increased, the sectional area of the second rear suction opening is decreased, and the second front suction opening forms a main suction opening; when the floor brush assembly 200 is moved backward, the free end of the third scraping bar 94 is forced to bend to the front side, the second front suction opening cross-sectional area decreases, the second rear suction opening cross-sectional area increases, and the second rear suction opening constitutes the main suction opening.

A fourth scraping bar 95 which has an interference effect with the second rolling brush 32 is further arranged in the second rolling brush chamber 7, the fourth scraping bar 95 is used for scraping redundant fluid on the second rolling brush 32, and can be arranged in the second rolling brush chamber 7 and close to the second fluid recovery channel 18, and the arrangement can be more beneficial to recovery of the scraped redundant fluid.

The second front suction opening is disposed in a direction away from the second rolling brush 32, and the second rear suction opening is disposed in a direction close to the second rolling brush 32; preferably, the second rear suction opening has a larger cross-sectional area than the second front suction opening to ensure that the excessive fluid scraped off the second roll brush 32 can be easily sucked into the second fluid recovery passage 18.

In order to ensure that both fluid and debris on both sides of the third wiper strip 94 are smoothly sucked into the second fluid recovery passage 18, the free end of the second suction opening front wall 1811 forming part of the second front suction opening is spaced further from the surface to be cleaned than the free end of the third wiper strip 94, thereby ensuring that a gap is always formed between the second front suction opening and the surface to be cleaned, through which fluid and large-particle debris can be sucked.

Likewise, the free end of the second suction port rear wall 1812 which forms part of the second rear suction port is located at a greater distance from the surface to be cleaned than the free end of the third wiper strip 94, thereby ensuring that a gap is always formed between the second rear suction port and the surface to be cleaned, into which fluid and large garbage can be sucked.

As shown in fig. 19 to 21, the first and second roll brush chambers 6 and 7 include first and second roll brush chamber upper covers 60 and 70, and the first and second roll brush chamber upper covers 60 and 70 are detachably mounted above the first and second roll brushes 31 and 32, respectively.

The first roller brush chamber upper cover 60 has one end detachably connected to the housing front portion 11 and the other end extending to the front of the first roller brush 31 in the axial direction of the first roller brush 31 and located below the rotation axis 314 of the first roller brush 31. A front swing stopper 61 may be provided on the other end of the first roll brush chamber upper cover 60.

Similarly, the second roller brush chamber cover 70 has one end removably connected to the housing rear portion 12 and the other end extending axially forward of the second roller brush 32 and below the rotational axis 324 of the second roller brush 32. A rear swing stopper 71 may be provided on the other end of the second roll brush chamber upper cover 70.

The front swing block 61 includes a front block plate 611 extending in the axial direction (left-right direction) of the first roller brush 31, a front rotary shaft 612, at least one front contact rotary protrusion 613 receiving a frictional force from a surface to be cleaned to rotatably actuate the front block plate 611; the front blocking plate 611 is disposed forward and parallel with respect to the first drum brush 31, and selectively blocks the front contaminants from entering the first fluid recovery channel 17.

Specifically, when the first suction opening 171 of the floor brush assembly 200 is located at the front side in the moving direction, the front blocking plate 611 rotates to form an opening with the surface to be cleaned, so as not to block the front dirt from entering the first fluid recovery channel 17; and closes the opening when the first suction port 171 is located at the rear side in the moving direction, the front blocking plate 611 rotates into contact with the surface to be cleaned to block contaminants in front thereof from entering the first fluid recovery passage 17.

The front contact rotating protrusion 613 is preferably provided in two and is respectively provided at both ends of the front barrier 611, so that it can better bring the front barrier 611 to rotate from both ends.

The front blocking plate 611 is provided in a flat plate shape, and the height of the front blocking plate 611 may be set such that the bottom end of the front blocking plate 611 slightly presses the cleaning surface when the front blocking plate 611 is perpendicular to the surface to be cleaned. Therefore, if the front blocking plate 611 is perpendicular to the cleaning surface, dirt in front of the front blocking plate 611 is not sucked into the first suction port 171 of the first fluid recovery passage 17.

The front rotary shaft 612 is integrally or fixedly connected with the front blocking plate 611, and is rotatably disposed on the first rolling brush chamber upper cover 60, so as to drive the front blocking plate 611 to rotate by a certain angle. The front rotary shaft 612 is made of a material such as a stainless steel rod penetrating the front blocking plate 611 for durability.

The front contact rotation protrusion 613 is at least partially disposed at the front side of the front blocking plate 611, so as to ensure that when the floor brush assembly 200 is pushed forward, the front contact rotation protrusion 613 rotates to the rear side due to contact friction with the surface to be cleaned and drives the front blocking plate 611 to rotate to the open position, and an opening is formed between the front blocking plate 611 and the surface to be cleaned, so as not to block front dirt from entering the first fluid recycling channel 17; when the floor brush assembly 200 is pulled backward, the front contact rotating protrusion 613 rotates to the front side due to contact friction with the surface to be cleaned and drives the front blocking plate 611 to rotate to be substantially perpendicular to the surface to be cleaned, and the front blocking plate 611 comes into contact with the surface to be cleaned to block front dirt from entering the first fluid recycling channel 17.

The front contact rotating protrusion 613 is made of a soft material, and is preferably provided in a hollow fan shape to facilitate its deformation so as to be sufficiently contacted with the surface to be cleaned, thereby increasing its contact friction.

The front blocking plate 611 is rotatable to an extreme position in contact engagement with the first rolling brush 31, that is, the front contact rotation protrusion 613 is provided such that the front blocking plate 611 is rotatable between a closed position substantially perpendicular to the surface to be cleaned and an open position in contact engagement with the first rolling brush 31.

Preferably, the rear swing stopper 71 and the front swing stopper 61 have the same structure.

Specifically, the rear swing stopper 71 also includes a rear stopper plate 711 extending in the axial direction (left-right direction) of the second drum brush 32, a rear rotational shaft 712, at least one rear contact rotational projection 713 receiving a frictional force from a surface to be cleaned to rotatably actuate the rear stopper plate 711; the rear blocking plate 711 is disposed rearward and in parallel with respect to the second roll brush 32, and selectively blocks rear contaminants from entering the second fluid recovery channel 18.

Specifically, when the second suction opening 181 of the floor brush assembly 200 is located at the rear side in the moving direction, the rear blocking plate 711 rotates to form an opening with the surface to be cleaned, so as not to block the front dirt from entering the second fluid recovery channel 18; and closes the opening when the second suction opening 181 is located at the forward side in the moving direction, the rear blocking plate 711 is rotated into contact with the surface to be cleaned to block the contaminants at the front portion thereof from entering the second fluid recovery passageway 18.

The rear contact rotation protrusions 713 are preferably provided in two and at both ends of the rear blocking plate 711, respectively, so that they can preferably rotate the rear blocking plate 711 from both ends.

The rear blocking plate 711 is provided in a planar plate shape, and the height of the rear blocking plate 711 may be set such that the bottom end of the rear blocking plate 711 slightly presses the cleaning surface when the rear blocking plate 711 is perpendicular to the surface to be cleaned. Therefore, if the rear blocking plate 711 is perpendicular to the cleaning surface, the contaminants in front of the rear blocking plate 711 are not sucked into the second suction port 181 of the second fluid recovery path 18.

The rear rotating shaft 712 is integrally or fixedly connected with the rear blocking plate 711, and is rotatably disposed on the second rolling brush chamber upper cover 70 so as to drive the rear blocking plate 711 to rotate by a certain angle. The rear rotating shaft 712 is made of a material such as a stainless steel rod penetrating the rear barrier plate 711 for durability.

The rear contact rotation protrusion 713 is at least partially disposed at the rear side of the rear blocking plate 711 to ensure that when the floor brush assembly 200 is pushed forward, the rear contact rotation protrusion 713 rotates to the rear side due to contact friction with the surface to be cleaned and drives the rear blocking plate 711 to rotate to the closed position, and the rear blocking plate 711 is substantially perpendicular to the surface to be cleaned to block rear dirt from entering the second fluid recycling channel 18; when the floor brush assembly 200 is pulled backward, the rear contact rotating protrusion 713 rotates to the front side due to contact friction with the surface to be cleaned and drives the rear blocking plate 711 to rotate to form an opening with the surface to be cleaned, so as not to block the rear dirt from entering the second fluid recycling channel 18.

The rear contact rotating protrusion 713 is made of a soft material, and is preferably formed in a hollow fan shape, so as to facilitate sufficient contact with the surface to be cleaned after being deformed, and increase the contact area and the contact friction force.

The rear blocking plate 711 is rotatable to an extreme position in contact engagement with the second drum brush 32, that is, the rear contact rotation protrusion 713 is provided such that the rear blocking plate 711 is rotatable between a closed position substantially perpendicular to a surface to be cleaned and an open position in contact engagement with the second drum brush 32.

As shown in fig. 16 and 22, the housing 1 has a water spray passage 8 therein, and the water spray passage 8 has a water inlet and a water spray for spraying water toward at least one of the first and second rolling brushes 31 and 32. Preferably, a first rolling brush water injection port 81 and a second rolling brush water injection port 82 are respectively provided inside the housing front part 11 and the housing rear part 12; when the surface cleaning apparatus is operated, the pump 84a is started, the control valve 85a is opened, and the cleaning liquid in the cleaning liquid tank 400 is ejected from the first and second rolling-brush water ejection ports 81 and 82 through the water ejection passage 8.

The first rolling brush water jet 81 is provided on the inner wall surface of the first rolling brush chamber 6 and is opposed to the first rolling brush 31, and the first rolling brush water jet 81 is higher than the second wiper strip 93. Similarly, the second rolling brush water jet 82 is provided on the inner wall surface of the second rolling brush chamber 7 so as to be opposed to the second rolling brush 32, and the second rolling brush water jet 82 is provided at a height higher than the fourth wiper strip 95.

Since the front-disposed first roll brush 31 mainly functions for cleaning, it is preferable that the water spray rate of the first roll brush water spray 81 is set to be larger than the water spray rate of the second roll brush water spray 82.

The water spray passage 8 is further provided with a third water spray opening 83 for spraying water toward the surface to be cleaned, and the third water spray opening 83 is selectively opened and closed by a control valve 85b such as a solenoid valve. Therefore, when the surface to be cleaned has stubborn stains and the like and the water spraying amount needs to be increased, the user can manually or automatically control the third water spraying port 83 to be opened to spray water towards the surface to be cleaned at a fixed point according to the control switch.

Preferably, the water spray flow rate of the third water spray 83 is set to be greater than that of the first roll brush water spray 81, thereby facilitating spot cleaning of stubborn stains.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A floor brush assembly for a surface cleaning apparatus, the floor brush assembly comprising a housing, a roller brush assembly and a roller brush drive assembly;

the rolling brush driving assembly comprises a motor assembly, a transmission assembly, a front driving shaft and a front driving part arranged on the front driving shaft;

the shell is provided with a shell front part, a shell rear part, a first side part and a second side part, the rolling brush assembly at least comprises a first rolling brush, the shell front part is provided with a first rolling brush chamber, and the first rolling brush is arranged in the first rolling brush chamber;

the method is characterized in that: the front driving part comprises a first driving head and a second driving head, the first driving head and the second driving head are respectively arranged at two sides of the front driving shaft, and the first driving head is matched with the first rolling brush at one side of the first side part facing the first rolling brush chamber; the ground brush assembly further comprises a first side brush, and the second driving head is matched with the first side brush at one side of the first side part, which is far away from the first rolling brush chamber.

2. The floor brush assembly of claim 1, wherein: the first side brush is at least mostly exposed outside the first side part of the shell;

preferably, the first side brush comprises a brush holder and bristles arranged on the brush holder, and at least most of the brush holder is exposed outside the first side part of the shell;

preferably, the bristles are all exposed outside the first side of the housing;

preferably, the first side brush and the first rolling brush rotate in the same direction;

preferably, an elastic anti-collision strip is convexly arranged on the outer side wall of the first side part;

preferably, the elastic bumper strip extends along the front-rear direction of the outer side wall of the first side part, and the maximum setting thickness of the elastic bumper strip along the axial direction of the first rolling brush is basically equal to or slightly larger than the maximum distance between the first side brush and the first side wall;

preferably, the first side brush is detachably mounted on the second driving head;

preferably, the first side brush is detachably mounted on the second driving head through a thread structure, and the thread direction of the thread structure is opposite to the working direction of the first rolling brush;

preferably, the first side brush is detachably arranged on the second driving head through magnetic attraction or an elastic buckle.

3. The floor brush assembly of claim 1, wherein: the bottom of the shell comprises a bottom plate, and a first fluid recovery channel is arranged in the shell and close to the first rolling brush;

preferably, the bottom plate is provided with an anti-backflow plate which can be selectively matched with the first rolling brush, and the anti-backflow plate can swing or deform under the influence of suction force when the floor brush assembly works;

preferably, the backflow prevention plate is formed within the first suction port of the first fluid recovery channel;

preferably, the anti-backflow plate can swing or deform to a working state forming a larger gap with the first rolling brush under the influence of suction force when the floor brush assembly works, and can be in an anti-backflow state with a smaller gap with the first rolling brush than the working state when the floor brush assembly is in a non-working state;

preferably, the anti-backflow plate is in a sealing contact state with the first rolling brush when in a non-working state;

preferably, the backflow prevention plate includes a fixed end fixedly connected to the bottom plate of the housing and a free end extending upward toward a direction of the first round brush, the free end having a height higher than a height of the fixed end in a vertical direction.

4. A floor brush assembly as defined in claim 3, wherein: a first scraping strip is arranged on a bottom plate behind the first rolling brush and faces to the surface to be cleaned, the first scraping strip is opposite to the first rolling brush, and a gap between the first scraping strip and the first rolling brush forms a first suction opening entering a first fluid recovery channel arranged in the shell;

preferably, the first scraping strip is arranged to extend in the same direction as the axial direction of the first rolling brush, and the length of the first scraping strip is longer than that of the first rolling brush;

preferably, at least a part of the end of the first scraping strip is exposed out of the first side part of the shell, and the length of the part of the end of the first scraping strip exposed out of the first side part can be set to be basically equal to or slightly larger than the maximum distance between the first side brush and the first side wall;

preferably, a first buffer part which is opened towards the first outlet of the first fluid recovery channel is arranged in the first fluid recovery channel;

preferably, the first buffer portion is provided as an annular pipe that protrudes obliquely from an inner wall of the first fluid recovery passage toward the first outlet direction.

5. The floor brush assembly of claim 4, wherein: the rolling brush assembly further comprises a second rolling brush, a second rolling brush chamber is arranged at the rear part of the shell, and the second rolling brush is arranged in the second rolling brush chamber; the shell further comprises a main fluid recycling channel and a second fluid recycling channel, and the second fluid recycling channel is arranged in the shell and is close to the second rolling brush;

preferably, the first outlet of the first fluid recovery passage and the second outlet of the second fluid recovery passage are in fluid communication with the inlet of the primary fluid recovery passage;

preferably, the maximum cross-sectional area of the first fluid recovery channel is greater than the maximum cross-sectional area of the second fluid recovery channel;

preferably, the maximum cross-sectional area of the first fluid recovery channel is S1, the maximum cross-sectional area of the second fluid recovery channel is S2, wherein S1/S2 is more than 2 and less than or equal to 10; preferably, 5 < S1/S2 ≦ 10.

6. The floor brush assembly of claim 5, wherein: the first fluid recovery passageway being disposed on a front side of the primary fluid recovery passageway and being disposed substantially horizontally from the first suction opening to the first outlet;

preferably, the inlet of the primary fluid recovery channel is arranged to smoothly interface with the first outlet of the first fluid recovery channel, and the primary fluid recovery channel extends obliquely upwardly and rearwardly from the inlet to the outlet;

preferably, the main fluid recovery channel is rearwardly provided with a guide pipeline, an outlet of the guide pipeline is arranged on a rear side wall of the main fluid recovery channel, an inlet of the guide pipeline is fluidly connected with a second outlet of the second fluid recovery channel, and the guide pipeline extends obliquely downward and rearwardly from the outlet to the inlet;

preferably, the second fluid recovery channel includes a second upper wall surface and a second lower wall surface, and a second half section of the second lower wall surface, which is in abutment with the guide pipe, is set to be substantially horizontal;

preferably, the second lower wall surface is provided with at least one wedge-shaped projection, the inclined side of the wedge-shaped projection is arranged close to the second suction side, and the blocking side of the projection is matched with the basically horizontal section of the second lower wall surface to form a second buffer part which can prevent the undesirable backflow;

7. the floor brush assembly of claim 6, wherein: the second suction opening of the second fluid recovery passage is disposed adjacent to but not in the second rolling brush chamber;

preferably, the second suction opening comprises at least a second suction opening front wall and a second suction opening rear wall;

preferably, a third scraping strip facing the surface to be cleaned is fixedly arranged in the second suction opening; the third scraping strip is arranged to divide the second suction opening into two suction openings which are independent of each other, namely a second front suction opening surrounded by the front wall of the second suction opening and the third scraping strip and a second rear suction opening surrounded by the rear wall of the second suction opening and the third scraping strip;

preferably, the third scraping bar is provided with a free end opposite to the surface to be cleaned and a fixed end opposite to the free end of the third scraping bar and used for installing the third scraping bar; the free end is positioned and dimensioned to have an interference or clearance with the surface to be cleaned that enables a scraping action to be achieved;

preferably, the free end of the front wall of the second suction opening and/or the rear wall of the second suction opening is spaced further from the surface to be cleaned than the free end of the third wiping strip.

8. The floor brush assembly of claim 7, wherein: the second front suction opening is arranged in a direction away from the second rolling brush, and the second rear suction opening is arranged in a direction close to the second rolling brush; the second rear suction opening has a larger cross-sectional area than the second front suction opening;

preferably, the third scraping strip is made of a soft material, when the floor brush assembly moves forwards, the free end of the third scraping strip is stressed to bend backwards, the sectional area of the second front suction opening is increased, the sectional area of the second rear suction opening is decreased, and the second front suction opening forms a main suction opening; when the floor brush assembly moves backwards, the free end of the third scraping strip is stressed to bend towards the front side, the sectional area of the second front suction opening is reduced, the sectional area of the second rear suction opening is increased, and the second rear suction opening forms a main suction opening.

9. The floor brush assembly of claim 8, wherein: the first rolling brush chamber and the second rolling brush chamber respectively comprise a first rolling brush chamber upper cover and a second rolling brush chamber upper cover; a front swing blocking piece is arranged at one end of the first rolling brush chamber upper cover, and a rear swing blocking piece is arranged at one end of the second rolling brush chamber upper cover;

preferably, the front swing block comprises a front block plate, a front rotary shaft, at least one front contact rotary protrusion receiving a frictional force from a surface to be cleaned to rotatably actuate the front block plate; and/or the rear swing blocking member comprises a rear blocking plate, a rear rotating shaft, and at least one rear contact rotating protrusion which receives friction force from the surface to be cleaned to enable the rear blocking plate to rotatably act;

preferably, the front blocking plate is disposed in front and parallel with respect to the first roller brush, and selectively blocks the front contaminants from entering the first fluid recovery channel; the rear blocking plate is arranged behind and in parallel with respect to the second roller brush and selectively blocks rear dirt from entering the second fluid recovery channel.

10. The floor brush assembly of claim 9, wherein: the front blocking plate can rotate between a closed position which is basically vertical to the surface to be cleaned and an open position which is in contact fit with the first rolling brush, and the rear blocking plate can rotate between a closed position which is basically vertical to the surface to be cleaned and an open position which is in contact fit with the second rolling brush;

preferably, when the floor brush assembly is pushed forwards, the blocking plate of the front swing blocking member rotates to the opening position, and the blocking plate of the rear swing blocking member rotates to the closing position;

preferably, the front contact rotation protrusion is at least partially disposed at a front side of the blocking plate; the rear contact rotating protrusion is at least partially arranged at the rear side of the blocking plate;

preferably, the front contact rotation protrusion and/or the rear contact rotation protrusion are made of a soft material and are arranged in a hollow fan shape.

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