CN219661594U

CN219661594U - Floor brush assembly for surface cleaning apparatus

Info

Publication number: CN219661594U
Application number: CN202222448612.XU
Authority: CN
Inventors: 王正亮
Original assignee: Suzhou Fushiwang Intelligent Technology Co ltd
Current assignee: Suzhou Fushiwang Intelligent Technology Co ltd
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2023-09-12
Anticipated expiration: 2032-09-15

Abstract

The utility model relates to a floor brush assembly for a surface cleaning apparatus, the floor brush assembly comprising a housing and a roller brush assembly; the front part of the shell is provided with a first rolling brush chamber, and the rear part of the shell is provided with a second rolling brush chamber; a main fluid recovery channel, a first fluid recovery channel and a second fluid recovery channel are arranged in the shell; the first outlet of the first fluid recovery channel and the second outlet of the second fluid recovery channel are in fluid communication with the inlet of the main fluid recovery channel; a front swing blocking member is arranged at the front side of the first rolling brush chamber, and can selectively block front dirt from entering the first fluid recovery channel; the rear side of the second rolling brush chamber is provided with a rear swing blocking member which can selectively block rear dirt from entering the second fluid recovery passage. Can solve the problem of the prior art that the cleaning effect of the double suction ports is reduced in suction.

Description

Floor brush assembly for surface cleaning apparatus

Technical Field

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

Background

Surface cleaning devices, such as floor washers, are increasingly popular with a wide range of users as cleaning appliances, and as floor washer products develop, users pay more attention to the cleaning efficiency of the floor washer products. As the double rolling brushes can finish floor cleaning more quickly, efficiently and laborsaving, the double rolling brushes are also more and more favored by users.

In order to recover the sewage discharged by the rolling brushes as soon as possible, the floor washing machine with double rolling brushes often has front and rear 2 suction ports, and floor cleaning is completed quickly, efficiently and laborsaving. Although this type of product is very efficient and time-saving when cleaned, the suction port is divided from the original single suction port into front and rear double suction ports under the condition that the power of the main power source is unchanged, so that the flow rate of air and the vacuum degree to the floor are necessarily reduced compared with the single suction port.

In order to solve the above problems, some of the prior art has achieved the objective of not seriously reducing the vacuum degree by setting the sectional area of the rear suction port to be relatively smaller. Although the above-mentioned manner can solve some problems, the front and rear suction openings are all opened in the rolling brush chamber, the size of the suction opening is generally determined by the gap between the side wall (generally the scraping strip) of the fluid channel and the rolling brush, but in order to ensure the smoothness of the rolling brush in the rolling brush chamber (not easy to be blocked by dirt), the gap between the rolling brush and the rolling brush chamber is generally large, so that the vacuum degree near the front and rear suction openings cannot be set too small, and therefore, the cleaning effect of the double-suction-opening floor scrubber is reduced compared with that of the single-suction-opening floor scrubber under the condition that the power of the power source is basically the same.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a floor brush assembly for a surface cleaning apparatus that solves the above-described problem of reduced cleaning effect suction by dual suction openings.

In order to achieve the above object, the present utility model provides a floor brush assembly for a surface cleaning apparatus, the floor brush assembly comprising a housing and a roller brush assembly; the rolling brush assembly comprises a first rolling brush and a second rolling brush, the shell is provided with a shell front part, a shell rear part and a bottom plate, the shell front part is provided with a first rolling brush chamber, and the shell rear part is provided with a second rolling brush chamber; the first rolling brush is arranged in the first rolling brush chamber, and the second rolling brush is arranged in the second rolling brush chamber; a main fluid recovery channel, a first fluid recovery channel and a second fluid recovery channel are arranged in the shell; the first outlet of the first fluid recovery channel and the second outlet of the second fluid recovery channel are in fluid communication with the inlet of the main fluid recovery channel; a front swing blocking member is arranged at the front side of the first rolling brush chamber, and can selectively block front dirt from entering the first fluid recovery channel; the rear side of the second rolling brush chamber is provided with a rear swing blocking member which can selectively block rear dirt from entering the second fluid recovery passage.

Preferably, when the floor brush assembly is moved forward, the front swing barrier rotates to an open position allowing front soil to enter the first fluid recovery channel and the rear swing barrier rotates to a closed position blocking rear soil from entering the second fluid recovery channel; when the floor brush assembly is moved rearward, the forward swing barrier rotates to a closed position blocking the forward dirt from entering the first fluid recovery passage and the rearward swing barrier rotates to an open position allowing the rearward dirt to enter the second fluid recovery passage.

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; the front swing blocking piece and the rear swing blocking piece are respectively arranged on the end parts of the upper cover of the first rolling brush chamber and the upper cover of the second rolling brush chamber.

Preferably, the front swing block includes a front blocking plate, a front rotating shaft, at least one front contact rotating protrusion receiving a frictional force from a surface to be cleaned to rotatably move the front blocking plate; and/or the rear swing block comprises a rear blocking plate, a rear rotating shaft and at least one rear contact rotating bulge 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 of and parallel to the first roller brush arrangement and selectively blocks front contaminants from entering the first fluid recovery channel; the rear blocking plate is disposed rearwardly and in parallel with respect to the second roller brush arrangement and selectively blocks rear contaminants from entering the second fluid recovery passage.

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

Preferably, the front blocking plate is provided in a planar plate shape, and the height of the front blocking plate is set such that the bottom end of the front blocking plate slightly presses the surface to be cleaned when the front blocking plate is perpendicular to the surface to be cleaned.

The front contact rotating protrusion is at least partially arranged at the front side of the front blocking plate; the rear contact rotating projection is at least partially disposed on the rear side of the rear blocking plate.

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

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.ltoreq.10, preferably 5 < S1/S2.ltoreq.10.

Preferably, the second suction opening of the second fluid recovery passage is arranged adjacent to the second roll brush chamber but not in the second roll brush chamber.

Preferably, the second suction opening of the second fluid recovery passage extends in a direction away from the bottom of the housing.

Preferably, the second suction opening comprises at least a second suction opening leading wall and a second suction opening trailing wall.

Preferably, a third scraping strip facing to the surface to be cleaned is fixedly arranged in the second suction port; the second suction port is divided into two suction ports which are independent from each other by the arrangement of the third scraping strip, namely a second front suction port formed by the front wall of the second suction port and the third scraping strip and a second rear suction port formed by the rear wall of the second suction port and the third scraping strip.

Preferably, the third wiper strip has a free end opposite the surface to be cleaned, and a fixed end opposite the free end of the third wiper strip for mounting the third wiper strip; the free end is positioned and dimensioned to have an interference or amount of clearance with the surface to be cleaned that enables a scraping action.

Preferably, the free end of the second suction opening leading wall and/or the second suction opening trailing wall is further from the surface to be cleaned than the free end of the third wiper strip.

Preferably, 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 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 port is increased, the sectional area of the second rear suction port is reduced, and the second front suction port forms a main suction port; 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.

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

Preferably, a backflow preventing plate which can be selectively matched with the first rolling brush is arranged on the bottom plate, and the backflow preventing plate can swing or deform under the influence of suction force when the ground brush assembly works.

Preferably, the backflow preventing plate is formed in the first suction port of the first fluid recovery passage.

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

Preferably, the backflow prevention plate forms a sealing contact state with the first rolling brush in the non-working state.

Preferably, the backflow preventing plate includes a fixed end fixedly connected with the bottom plate of the housing and a free end extending upward toward the direction of the first rolling brush, the free end being higher than the fixed end in the vertical direction.

Preferably, a first scraping strip is arranged on the bottom plate behind the first rolling brush towards 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 into a first fluid recovery channel arranged in the shell.

Preferably, the first fluid recovery passage is provided on a front side of the main fluid recovery passage and is provided substantially horizontally from the first suction port to the first outlet.

Preferably, the inlet of the main fluid recovery channel is arranged in smooth abutment with the first outlet of the first fluid recovery channel, and the main fluid recovery channel extends obliquely upwards and backwards from the inlet to the outlet.

Preferably, the main fluid recovery channel is provided with a guide pipeline towards the rear, an outlet of the guide pipeline is arranged on the rear side wall of the main fluid recovery channel, an inlet of the guide pipeline is in fluid connection with a second outlet of the second fluid recovery channel, and the guide pipeline extends downwards and backwards in an inclined manner from the outlet to the inlet.

Preferably, the second fluid recovery passage 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 abutted with the guide pipe, is arranged in a substantially horizontal shape.

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 opening side, and the blocking side of which cooperates with a substantially horizontal section of the second lower wall surface to form a second buffer against unwanted back flow.

Preferably, a first buffer part with an opening facing to a first outlet of the first fluid recovery channel is arranged in the first fluid recovery channel; the first buffer portion is provided as an annular pipe protruding obliquely from an inner wall of the first fluid recovery passage toward the first outlet direction.

Preferably, the ground brush assembly further comprises a first side brush, the rolling brush driving assembly drives the first rolling brush and the first side brush to rotate towards the same direction, and the first side brush is arranged on one side of the first side part far away from the first rolling brush chamber and at least a majority of the first side part is exposed out of the first side part of the shell.

Preferably, the first side brush includes a brush holder and bristles mounted on the brush holder, the brush holder being at least largely exposed outside the first side of the housing.

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

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

Preferably, the outer side wall of the first side part is convexly provided with an elastic anti-collision strip.

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

Preferably, the first side brush is detachably mounted on one side of the first side portion.

Preferably, 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 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 second driving head is matched with the first side brush at one side of the first side part far away from the first rolling brush chamber.

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

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.

The floor brush assembly for the surface cleaning equipment still adopts a double-rolling brush scheme, but front and rear swing blocking pieces are respectively arranged in the front and rear of the front and rear rolling brush chambers of the floor brush assembly, so that when the floor brush assembly moves forwards or backwards, one swing blocking piece can relatively close a suction port which does not play a main role, the vacuum degree of the whole machine is ensured, and the cleaning effect is better than that of the double-rolling brush scheme of the conventional technology.

In addition, the second suction port of the second fluid recovery passage is arranged adjacent to the second rolling brush chamber but not in the second rolling brush chamber, that is, the second suction port can be arranged in any shape and size according to the requirement, so that the vacuum degree of the suction port is not limited by the rolling brush chamber, and can be arranged closer to the surface to be cleaned, and thus the dirt on the surface to be cleaned can be cleaned more easily.

In addition, the fluid recovery channels arranged in front and back of the floor brush assembly are respectively provided with multiple backflow prevention structures, so that the situation that unexpected fluid flows back to the surface to be cleaned during shutdown is fully avoided.

Drawings

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

FIG. 2 is a schematic illustration of the external configuration of a floor brush assembly according to one embodiment;

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

FIG. 4 is a schematic cross-sectional view of a floor brush assembly along a roll brush axis in one embodiment;

FIG. 5 is a schematic diagram of the connection of a roller brush drive assembly in one embodiment;

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

FIG. 7 is a schematic view of a first side brush according to one embodiment;

FIG. 8 is a schematic view of the structure of a first roller brush according to an embodiment;

FIG. 9 is a schematic view of a roll brush locking end cap in one embodiment;

FIG. 10 is a schematic view of an alternative angle of the floor brush assembly according to one embodiment;

FIG. 11 is a schematic view of a roller brush assembly of a floor brush assembly according to one embodiment;

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

FIG. 13A is an enlarged view of a portion of the anti-reflux plate of FIG. 12 in a non-operational state;

FIG. 13B is an enlarged view of a portion of the anti-reflux plate of FIG. 12 in an operational state;

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

FIG. 15 is a schematic view of a partial cross-sectional structure of a ground brush assembly from a top view in one embodiment;

FIG. 16 is a schematic view of a bottom view of a portion of the structure of a floor brush assembly according to one embodiment;

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

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

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

FIG. 18C is an enlarged view of a portion of the third wiper strip of FIG. 12 in a post-tensioned state of the brush assembly;

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

FIG. 20A is a schematic view of the swing block in a forward operating condition of the floor brush assembly according to one embodiment;

FIG. 20B is a schematic view of the swing block in a pull-back operating condition of the floor brush assembly according to one embodiment;

FIG. 21 is a schematic view of a bottom angle of a floor brush assembly according to one embodiment;

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

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

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

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

Fig. 1 is a schematic structural diagram of a surface cleaning apparatus according to an embodiment of the present utility model, in this embodiment, taking the cleaning apparatus as a cleaning machine, the cleaning apparatus includes a floor brush assembly, a main body 100, and a floor brush assembly 200 mounted on the main body 100 and adapted to move over a surface to be cleaned; a cleaning liquid tub 400; a power device; 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 to control other functions of the cleaning device, which will not be described in detail herein.

As shown in fig. 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 roller brush assembly 3 comprises a first roller brush 31 and a second roller brush 32, the housing 1 having a housing front 11, a housing rear 12, a first side 13 and a second side 14, the housing front 11 being provided with a first roller brush chamber 6, the housing rear 12 being provided with a second roller brush 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 in particular, the roll brush drive assembly 2 includes a motor assembly 21, a transmission assembly 22, a front drive shaft 23, a front drive 24 disposed on the front drive shaft 23, a rear drive shaft, and a rear drive disposed on the rear drive 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 separately disposed at two sides of the front driving shaft 23, and the first driving head 241 is engaged with the first rolling brush 31 at the first side 13 toward the first rolling brush chamber 6.

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

The drive assembly 22 includes, but is not limited to, a belt drive, a gear drive, etc., which is illustrated in this embodiment.

The motor assembly 21 may be the same 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 belt transmission, or may be two motors that drive the front driving shaft 23 and the rear driving shaft to rotate reversely.

The floor brush assembly 200 further includes a first side brush 4, and the second driving head 242 is coupled to 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 outside the first side 13 of the housing 1, the first side brush 4 comprises a brush holder 41 and bristles 42 mounted on the brush holder 41, the brush holder 41 is at least mostly exposed outside the first side 13 of the housing 1, and the bristles are all exposed outside the first side 13 of the housing 1. The arrangement improves the cleaning effect of the wall edge to the greatest extent on the premise of ensuring the stable installation of the first side brush 4.

The maximum diameter of the first side brush 4 is preferably set to be larger than that of the first rolling brush 31, and at least part of the bristles are preferably inclined away from the first side portion 13, so that contact with the wall body can be achieved when the floor brush assembly 200 moves near the wall body, and the risk of the housing of the floor brush assembly 200 touching the wall body 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 through the second driving head 242 and the first driving head 241, respectively, and the rotation directions of the first side brush 4 and the first rolling brush 31 are the same.

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 when the first rolling brush 31 works, the screw structure is more and more rotated and tighter due to the arrangement of opposite directions, so that the first rolling brush 31 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 elastic buckling, and the above arrangement can achieve the purpose of convenient dismounting.

Specifically, the outer side wall of the first side portion 13 is provided with an elastic anti-collision strip 131 in a protruding manner, and the maximum thickness of the elastic anti-collision strip 131 along the axial direction of the first rolling brush 31 is substantially equal to or slightly greater than the maximum distance between the first side brush 4 and the first side wall; the above arrangement can avoid the first side brush 4 exposed outside the first side 13 of the housing 1 from being stuck by objects such as a wall or furniture when cleaning corners.

The elastic anti-collision strip 131 extends along the front-back direction of the outer side wall of the first side portion 13, and the section of the thickness direction of the elastic anti-collision strip is designed to be an arc surface or a spherical surface, so that the risk of damaging furniture or a wall when the floor brush assembly 200 works is reduced; the elastic bumper 131 may be provided in one or more pieces, and it is needless to say that it is not necessarily provided to extend in the front-rear direction, as long as it can provide the above-described similar effect.

As shown in fig. 8 to 11, the first roll brush 31 includes a roll brush body 310 and a bristle layer 311, a roll brush driving cap 312, and a roll brush locking cap 313. The rolling brush body 310 is of a hollow tubular structure, the outer side of the rolling brush body 310 is wrapped with the bristle layer 311, the bristle layer 311 is wrapped on the whole peripheral surface of the rolling brush body 310, when the rolling brush body 310 rotates around the rotation axis 314 of the rolling brush body, the bristle layer 311 is driven to rotate circumferentially, and the bristle layer 311 can be in rolling contact with the surface to be cleaned so as to clean the surface to be cleaned.

The roll brush driving end cap 312 is fixedly coupled to one end of the roll brush body 310 and seals one end of the roll brush body 310. The roller brush driving end cover 312 is integrally cylindrical, a driving groove 315 is disposed on an end surface of the roller brush driving end cover facing away from the roller brush body 310, and a plurality of clamping structures 316 are disposed on an inner peripheral surface of the driving groove 315.

The first driving head 241 can be inserted into the driving groove 315, and the outer circumferential surface of the first driving head 241 is engaged with the engaging structure 316 on the inner circumferential surface of the driving groove 315, and the first driving head 241 can be, but is not limited to, a spline, so that the spline is engaged with the driving groove 315, and when the motor is operated, the first rolling brush 31 is driven to rotate by the spline.

The roll brush locking end cap 313 is fixedly connected to the other end of the roll brush holder 310 and seals the other end of the roll brush holder 310. The roll brush locking end cap 313 may include a roll brush locking end cap body 317 and a roll brush releasing part 318 rotatably coupled to one side end surface of the roll brush locking end cap body 317. The roll brush locking end cap body 317 is generally cylindrical, and the roll brush releasing portion 318 may be shaped to suit the user's operation.

When the first rolling brush 31 is mounted on the ground brush assembly 200, the driving end of the rolling brush driving assembly 2 in the ground brush of the scrubber can be inserted into the driving groove 315, and the outer circumferential surface of the first driving head 241 of the rolling brush driving assembly 2 is engaged with the engaging structure 316 on the inner circumferential surface of the driving groove 315, and the rolling brush releasing portion 318 of the rolling brush locking end cover 313 is locked on the second side portion 14 of the ground brush assembly 200, thereby achieving successful mounting and locking of the first rolling brush 31; 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 the rolling brush away from the second side portion 14 to remove the first rolling brush 31.

Preferably, a second side brush 5 is also arranged on the second side 14 of the ground brush assembly 200, in order to facilitate the installation of the second side brush 5, a groove is arranged 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 comprises a brush seat 51 and bristles 52 arranged on the brush seat 51, a locking structure detachably matched with the groove is arranged on the brush seat 51, at least most of the brush seat 51 is exposed outside the second side 14 of the casing 1, and all of the bristles 52 are exposed outside the second side 14 of the casing 1.

Likewise, the outer side wall of the second side portion 14 is provided with an elastic anti-collision strip 141 in a protruding manner, and the maximum thickness of the elastic anti-collision strip 141 along the axial direction of the first rolling brush 31 is substantially equal to or slightly greater than the maximum distance between the second side brush 5 and the second side wall; the above arrangement can avoid the second side brush 5 exposed outside the second side portion 14 of the housing 1 from being stuck due to too close proximity to the wall or furniture when cleaning the corner.

Likewise, the elastic anti-collision strip 141 extends along the front-back direction of the outer sidewall of the second side portion 14, and the cross section of the elastic anti-collision strip in the thickness direction is designed to be an 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 141 may be provided in one or more pieces, and it is not necessarily provided to extend in the front-rear direction, as long as it can be provided to exert the similar effects as described above.

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; the bottom plate 15 is provided with a backflow preventing plate 91 that can be selectively matched with the first rolling brush 31, the backflow preventing plate 91 can be swung or deformed to an operating state with a larger gap between the backflow preventing plate 91 and the first rolling brush 31 due to the influence of suction force when the ground brush assembly 200 is in operation, so that the large-particle garbage can not enter the first fluid recovery channel 17, the backflow preventing plate 91 can be in a backflow preventing state with a smaller gap between the backflow preventing plate 91 and the first rolling brush 31 than that in the operating state when the ground brush assembly 200 is in the non-operating state, preferably, the backflow preventing plate 91 and the first rolling brush 31 form a sealing contact state, namely the gap is approximately equal to zero when in the non-operating state, and therefore secondary pollution of a surface to be cleaned caused by unwanted fluid backflow after the surface cleaning device is stopped can be avoided.

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 casing 1, and a free end thereof extends upward in a direction toward the first roller brush 31, so as to secure a height of the free end higher than a vertical direction of the fixed end, thereby being capable of preventing unwanted fluid from flowing back to the first suction port 171 and being discharged after the surface cleaning apparatus is stopped.

The backflow preventing plate 91 may be provided in a flat or curved shape or in a special shape composed of a plurality of flat or curved surfaces, as long as the free end thereof can be provided to be higher than the fixed end in the vertical direction. In this embodiment, the backflow preventing plate 91 is a fold line plate formed by two sections of planes, the plane section where the fixed end is located is preferably made of a relatively rigid material and integrally or detachably connected to the bottom plate 15, and the plane section where the free end is located is preferably made of a relatively soft material and is deformable or the plane section made of a relatively rigid material can swing.

The first buffer portion 173 with an opening facing the first outlet 172 of the first fluid recovery channel 17 is disposed in the first fluid recovery channel 17, and the first buffer portion 173 does not affect the movement of the fluid entering from the first suction port 171 toward the first outlet 172 of the first fluid recovery channel 17, and can store a part of the fluid flowing back from the first outlet 172 of the first fluid recovery channel 17 to the first suction port 171, thereby reducing the secondary pollution caused by the unwanted fluid flowing back after the surface cleaning apparatus is stopped.

As shown in fig. 14 in particular, the first fluid recovery passage 17 is formed in a pipe which is arranged substantially horizontally, and the first buffer portion 173 is preferably provided as an annular pipe which protrudes obliquely from the inner wall of the pipe toward the first outlet 172, and may be provided adjacent to the first fluid recovery passage 17 near the first suction port 171.

A first scraper bar 92 may be disposed 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 92 is opposite to the first rolling brush 31, and a gap between the first scraper 92 and the first rolling brush forms a first suction port 171 which enters a first fluid recovery passage 17 provided in the housing 1; and the free end of the first scraper bar 92 is positioned and dimensioned to have an interference or clearance with the surface to be cleaned that is capable of scraping (i.e., scraping away solid or liquid debris, as described below).

In the embodiment of the present utility model, in order to stably mount the first wiper 92 on the base plate 15, a wiper mounting portion is provided, and the fixed end of the first wiper 92 opposite to the free end of the first wiper 92 is mounted on the base plate 15 through the wiper mounting portion, where the wiper mounting portion may be specifically selected to be integrally formed with the base or to be stably mounted by adopting other fixing structures.

Further, in the embodiment of the present utility model, the material of the first scraping strip 92 is a soft material (silica gel, rubber, etc.); an interference magnitude capable of realizing a dust scraping effect is arranged 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 always be attached to the ground during working; correspondingly, if the material of the first scraping strip 92 is a non-soft material, a gap amount capable of realizing a dust scraping effect is provided 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 amount is very small, so that the airflow formed in the first suction port 171 has an airflow velocity as large as possible, which not only can improve the cleaning efficiency, but also can prevent the free end of the first scraping strip 92 from being damaged by collision.

If the material of the first scraping strip 92 is selected to be soft, the free end of the first scraping strip 92 has three states, in which when the floor brush assembly 200 is stationary, the free end of the first scraping strip 92 is substantially perpendicular to the surface to be cleaned; as the floor brush assembly 200 moves forward, the free end of the first scraper bar 92 is forced to bend backward, and the sectional area of the first suction port 171 increases; when the floor brush assembly 200 moves backward, the free end of the first scraper 92 is forced to bend toward the front side, and the sectional area of the first suction opening 171 is reduced; and the first suction port 171 is in a state of reduced cross-sectional area in which the first scraper 92 and the surface to be cleaned form a transitional slope so that the air flow formed by the first suction port 171 can directly suck impurities such as dust, sewage, etc. into the first fluid recovery passage 17.

As shown in fig. 15, the first scraping strip 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 longer than the length of the first rolling brush 31, that is, at least a part of the end portion of the first scraping strip 92 is exposed outside the first side portion 13 of the housing 1, preferably, the length of the part of the end portion of the first scraping strip 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 or the like cleaned by the first side brush 4 may be scraped by the part of the end portion of the first scraping strip 92 and sucked into the first fluid recovery passage 17 through the first suction port 171. More preferably, the maximum distance between the first side brush 4 and the first side wall is equal to or less than the length of the part of the end portion of the first scraping strip 92 exposed outside the first side portion 13, and the length of the part of the end portion of the first scraping strip 92 exposed outside the first side portion 13 is equal to or less than the maximum set thickness of the elastic anti-collision strip 131 on the first side portion 13 along the axial direction of the first rolling brush 31.

Likewise, at least a part 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 part 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 or the like cleaned by the second side brush 5 can be scraped by the part of the end of the first scraping strip 92 and sucked into the first fluid recovery passage 17 through the first suction port 171.

The first rolling brush chamber 6 is further provided with a second scraping strip 93 interfering with the first rolling brush 31, where the second scraping strip 93 is used to scrape off the excessive fluid on the first rolling brush 31, and may be disposed at the front end of the first rolling brush chamber 6 opposite to the first rolling brush 31 or at the upper end opposite to the first rolling brush 31 and near the first fluid recovery channel 17, and in this embodiment, the second scraping strip 93 is disposed at the upper end opposite to the first rolling brush 31 and near the first fluid recovery channel 17, which may be more beneficial to the recovery of the scraped-off excessive fluid. Advantageously, as shown in fig. 17, the second scraping strip 93 may be provided with a comb structure, facilitating cleaning of hairs or the like on the first roller brush 31.

As shown in fig. 12 and 18A-18C, the housing 1 further includes a main fluid recovery channel 16 and a second fluid recovery channel 18, the second fluid recovery channel 18 being disposed within the housing 1 and adjacent to the second roller brush 32; the second suction opening 181 of the second fluid recovery passage 18 is provided 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 channel 17 and the second outlet 182 of the second fluid recovery channel 18 are in fluid communication with the inlet 161 of the main fluid recovery channel 16. Since most of the solid and liquid waste is cleaned during the forward pushing of the surface cleaning apparatus, if the first and second fluid recovery passages 17, 18 are arranged substantially identically, the suction of the subsequent second fluid recovery passage 18 is wasted, and in this embodiment, the maximum cross-sectional area of the first fluid recovery passage 17 is preferably greater than the maximum cross-sectional area of the second fluid recovery passage 18, so that the brush assembly 200 draws relatively more solid and/or liquid waste through the first roller brush 31 and the first fluid recovery passage 17 for a primary cleaning action, and the second roller brush 32 and the second fluid recovery passage 18 draw relatively less solid and/or liquid waste.

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

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

Specifically, as shown in fig. 12, the second fluid recovery channel 18 is disposed at a rear side of the main fluid recovery channel 16, in order not to affect the smoothness of fluid recovery of the first fluid recovery channel 17, a guiding pipeline 163 is provided on a rear side wall of the main fluid recovery channel 16 towards the rear, an outlet of the guiding pipeline 163 is disposed on the rear side wall of the main fluid recovery channel 16, an inlet of the guiding pipeline 163 is in fluid connection with a second outlet 182 of the second fluid recovery channel 18, and the guiding pipeline 163 extends downward and backward from the outlet to the inlet. With this arrangement, even though the small amount of fluid flowing into the main fluid recovery passage 16 from the second fluid recovery passage 18 is not smoothly abutted, the small 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 tank while being entrained.

As shown in fig. 18A-18C, the second fluid recovery channel 18 includes a second upper wall 183 and a second lower wall 184, where the second lower wall 184 is substantially horizontal at the second half of the abutting joint with the guide pipeline 163, so that the fluid can circulate in the second fluid recovery channel 18, and the cleaning efficiency is improved.

The connection section of the second lower wall surface 184 and the second suction port 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 near the second suction port 181 side, and the angle and the height are set on the premise that the suction of the fluid is not affected, and the blocking side of the protrusion 185 cooperates with the substantially horizontal section of the second lower wall surface 184 to form a second buffer portion capable of preventing the occurrence of an undesired backflow.

The second suction port 181 comprises at least a second suction port front wall 1811 and a second suction port rear wall 1812, preferably surrounded by the second suction port front wall 1811 and the second suction port rear wall 1812, a third scraping strip 94 facing the surface to be cleaned is fixedly arranged in the second suction port 181, the third scraping strip 94 has a free end capable of contacting 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 scraper bar 94 is positioned and dimensioned to have an interference or clearance with the surface to be cleaned that enables a scraping action.

The third scraping strip 94 may divide the second suction port 181 into two suction ports independent of each other, namely a second front suction port surrounded by the second suction port front wall 1811 and the third scraping strip 94 and a second rear suction port surrounded by the second suction port rear wall 1812 and the third scraping strip 94; when the floor brush assembly 200 is advanced in operation, the debris is drawn into the second fluid recovery passage 18 by the second forward suction opening, which is primarily comprised of the second suction opening forward wall 1811 and the third scraper bar 94; when the floor brush assembly 200 is pulled rearwardly, debris is drawn into the second fluid recovery passage 18 primarily by the second rear suction opening formed by the second suction opening rear wall 1812 and the third scraper bar 94. The above arrangement can prevent the scraper bar from being disposed at the suction port side, and when the floor brush assembly 200 moves to the side where the scraper bar is disposed, the scraper bar becomes an obstacle against the entry of the garbage into the suction port passage instead.

Further, in the embodiment of the present utility model, the third scraping strip 94 is made of a soft material (silica gel, rubber, etc.); an interference magnitude capable of realizing a dust scraping effect is arranged 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 always be attached to the ground during working; correspondingly, if the third scraper 94 is made of a non-soft material, a gap amount capable of realizing a dust scraping effect is provided between the free end of the third scraper 94 and the surface to be cleaned, that is, the free end of the third scraper 94 is designed to be slightly shorter, it should be noted that the gap amount is very small, so that the airflow velocity formed in the second suction port 181 is as large as possible, which not only can improve the cleaning efficiency, but also can prevent the free end of the third scraper 94 from being damaged by collision.

If the third scraping strip 94 is made of soft material, the free end of the third scraping strip 94 is in three states, and when the floor brush assembly 200 is stationary, the free end of the third scraping strip 94 is substantially perpendicular to the surface to be cleaned; when the floor brush assembly 200 moves forward, the free end of the third wiper strip 94 is forced to bend backward, the second front suction opening increases in cross-sectional area and the second rear suction opening decreases in cross-sectional area, and the second front suction opening forms the main suction opening; when the floor brush assembly 200 moves rearward, the free end of the third wiper strip 94 is forced to flex toward the front side, the second front suction opening decreases in cross-sectional area and the second rear suction opening increases in cross-sectional area, and the second rear suction opening constitutes the main suction opening.

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

The second front suction port is arranged in a direction away from the second rolling brush 32, and the second rear suction port is arranged 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 surplus fluid scraped off the second roller brush 32 can be easily sucked into the second fluid recovery passage 18.

In order to ensure that both the fluid and the debris on both sides of the third scraper 94 can be smoothly sucked into the second fluid recovery passage 18, the free end of the second suction inlet front wall 1811, which forms part of the second front suction inlet, is set to be farther from the surface to be cleaned than the free end of the third scraper 94, thereby ensuring that the second front suction inlet and the surface to be cleaned always form a gap for sucking in the fluid and the large-particle debris.

Likewise, the free end of the second suction opening rear wall 1812 which forms part of the second rear suction opening is set farther from the surface to be cleaned than the free end of the third scraper bar 94, thereby ensuring that a gap through which fluid and large-particle waste can be sucked is always formed between the second rear suction opening and the surface to be cleaned.

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

One end of the first rolling brush chamber upper cover 60 is detachably connected with the front part 11 of the shell, and the other end of the first rolling brush chamber upper cover extends to the front of the first rolling brush 31 along the axial direction of the first rolling brush 31 and is positioned below the rotation axis 314 of the first rolling brush 31. A forward swing stopper 61 may be provided on the other end of the first rolling brush chamber upper cover 60.

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

The front swing stopper 61 includes a front blocking plate 611 extending along an axial direction (left-right direction) of the first roller brush 31, a front rotation shaft 612, at least one front contact rotation protrusion 613 receiving a frictional force from a surface to be cleaned to rotatably move the front blocking plate 611; the front blocking plate 611 is disposed in front of and parallel to the first roller brush 31, and selectively blocks front contaminants from entering the first fluid recovery passage 17.

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

The front contact rotation protrusions 613 are preferably provided in two and are respectively provided at both ends of the front blocking plate 611 so that they preferably rotate the front blocking plate 611 from both ends.

The front blocking plate 611 is provided in a planar 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 barrier 611 is perpendicular to the cleaning surface, dirt in front of the front barrier 611 is not sucked into the first suction port 171 of the first fluid recovery passage 17.

The front rotation shaft 612 is integrally or fixedly connected with the front blocking plate 611 and rotatably provided on the first roll brush chamber upper cover 60 so as to drive the front blocking plate 611 to rotate by a certain angle. For durability, the front rotation shaft 612 is made of a stainless steel rod or the like penetrating the front blocking plate 611.

The front contact rotating protrusion 613 is at least partially disposed at the front side of the front blocking plate 611 to ensure that the front contact rotating 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 when the floor brush assembly 200 is pushed forward, and an opening is formed between the front blocking plate 611 and the surface to be cleaned so as not to block front contaminants from entering the first fluid recovery channel 17; and when the floor brush assembly 200 is pulled back, the front contact rotating protrusion 613 rotates forward due to contact friction with the surface to be cleaned and drives the front blocking plate 611 to rotate substantially perpendicular to the surface to be cleaned, and at this time, the front blocking plate 611 contacts with the surface to be cleaned to block the front dirt thereof from entering the first fluid recovery channel 17.

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

The front blocking plate 611 is rotatable to a limit position in contact engagement with the first roller brush 31, i.e. the front contact rotation protrusion 613 is arranged 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 roller brush 31.

Preferably, the rear swing block 71 and the front swing block 61 are identical in structure.

Specifically, the rear swing stopper 71 also includes a rear blocking plate 711 extending in the axial direction (left-right direction) of the second roller brush 32, a rear rotation shaft 712, at least one rear contact rotation protrusion 713 which receives a frictional force from the surface to be cleaned to rotatably actuate the rear blocking plate 711; the rear blocking plate 711 is disposed in a rear and parallel arrangement with respect to the second roller brush 32, and may selectively block rear contaminants from entering the second fluid recovery passage 18.

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

The rear contact rotation protrusions 713 are preferably provided in two and are provided at both ends of the rear blocking plate 711, respectively, so that they 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, dirt in front of the rear blocking plate 711 is not sucked into the second suction port 181 of the second fluid recovery passage 18.

The rear rotation shaft 712 is integrally provided with or fixedly coupled to the rear blocking plate 711 and rotatably provided on the second roll brush chamber upper cover 70 so as to rotate the rear blocking plate 711 by a certain angle. For durability, the rear rotation shaft 712 is made of a stainless steel rod or the like penetrating the rear blocking plate 711.

The rear contact rotating protrusion 713 is at least partially disposed at the rear side of the rear blocking plate 711 to ensure that the rear contact rotating 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 when the floor brush assembly 200 is pushed forward, and the rear blocking plate 711 is substantially perpendicular to the surface to be cleaned to block rear contaminants from entering the second fluid recovery passage 18; and when the floor brush assembly 200 is pulled back, the rear contact rotating protrusion 713 rotates toward 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 rear contaminants from entering the second fluid recovery passage 18.

The rear contact rotation protrusion 713 is formed of a soft material, and is preferably provided in a hollow fan shape so as to facilitate sufficient contact with the surface to be cleaned after deformation thereof, increasing the contact area and the contact friction thereof.

The rear blocking plate 711 is rotatable to an extreme position in contact engagement with the second roller brush 32, i.e. the rear contact rotation protrusion 713 is arranged such that the rear blocking plate 711 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 32.

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

The first rolling brush water spraying openings 81 are formed in the inner wall surface of the first rolling brush chamber 6 and are opposite to the first rolling brush 31, and the first rolling brush water spraying openings 81 are higher than the second scraping strips 93. Similarly, the second rolling brush water spraying openings 82 are provided on the inner wall surface of the second rolling brush chamber 7 and are opposite to the second rolling brush 32, and the second rolling brush water spraying openings 82 are provided at a higher level than the fourth scraping strip 95.

Because of the primary cleaning action of the first front-disposed roller brush 31, the water jet flow rate of the first roller brush water jet 81 is preferably set to be larger than that of the second roller brush water jet 82.

The water spraying passage 8 is further provided with a third water spraying port 83 for spraying water toward the surface to be cleaned, and the third water spraying port 83 is selectively opened and closed by a control valve 85b such as a solenoid valve. Thus, 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 according to the control switch so as to spray water towards the fixed point of the surface to be cleaned.

Preferably, the water jet flow rate of the third water jet 83 is set to be larger than that of the first rolling brush water jet 81, so that the fixed point cleaning of stubborn stains is facilitated.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A floor brush assembly for a surface cleaning apparatus, the floor brush assembly comprising a housing and a roller brush assembly; the rolling brush assembly comprises a first rolling brush and a second rolling brush, the shell is provided with a shell front part, a shell rear part and a bottom plate, the shell front part is provided with a first rolling brush chamber, and the shell rear part is provided with a second rolling brush chamber; the first rolling brush is arranged in the first rolling brush chamber, and the second rolling brush is arranged in the second rolling brush chamber; a main fluid recovery channel, a first fluid recovery channel and a second fluid recovery channel are arranged in the shell; the first outlet of the first fluid recovery channel and the second outlet of the second fluid recovery channel are in fluid communication with the inlet of the main fluid recovery channel;

the method is characterized in that: a front swing blocking member is arranged at the front side of the first rolling brush chamber, and can selectively block front dirt from entering the first fluid recovery channel; the rear side of the second rolling brush chamber is provided with a rear swing blocking member which can selectively block rear dirt from entering the second fluid recovery passage.

2. The floor brush assembly of claim 1, wherein: when the floor brush assembly moves forward, the front swing barrier rotates to an open position allowing front soil to enter the first fluid recovery channel, and the rear swing barrier rotates to a closed position blocking rear soil from entering the second fluid recovery channel; when the floor brush assembly is moved rearward, the forward swing barrier rotates to a closed position blocking the forward dirt from entering the first fluid recovery passage and the rearward swing barrier rotates to an open position allowing the rearward dirt to enter the second fluid recovery passage.

3. The floor brush assembly of claim 2, 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; the front swing blocking piece and the rear swing blocking piece are respectively arranged at the end parts of the upper cover of the first rolling brush chamber and the upper cover of the second rolling brush chamber.

4. A floor brush assembly according to claim 3, wherein: the front swing blocking piece comprises a front blocking plate, a front rotating shaft and at least one front contact rotating bulge which receives friction force from a surface to be cleaned to enable the front blocking plate to rotatably act;

and/or the rear swing block comprises a rear blocking plate, a rear rotating shaft and at least one rear contact rotating bulge which receives friction force from the surface to be cleaned to enable the rear blocking plate to rotatably act.

5. The floor brush assembly of claim 4, wherein: the front blocking plate is arranged in front of and in parallel with the first rolling brush and can selectively block front dirt from entering the first fluid recovery channel; the rear blocking plate is disposed rearwardly and in parallel with respect to the second roller brush arrangement and selectively blocks rear contaminants from entering the second fluid recovery passage.

6. The floor brush assembly of claim 5, wherein: the front blocking plate is rotatable between a closed position substantially perpendicular to the surface to be cleaned and an open position in contacting 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 contacting engagement with the second roller brush.

7. The floor brush assembly of claim 6, wherein: the front blocking plate is provided in a planar plate shape, and the height of the front blocking plate is set such that the bottom end of the front blocking plate slightly presses the surface to be cleaned when the front blocking plate is perpendicular to the surface to be cleaned.

8. The floor brush assembly of claim 7, wherein: the front contact rotating protrusion is at least partially arranged at the front side of the front blocking plate; the rear contact rotating projection is at least partially disposed on the rear side of the rear blocking plate.

9. The floor brush assembly of claim 8, wherein: the front contact rotating protrusion and/or the rear contact rotating protrusion are/is made of soft materials and are formed by combining at least two hollow fan-shaped protrusions.

10. The floor brush assembly of claim 5, wherein: the maximum cross-sectional area of the first fluid recovery passage is greater than the maximum cross-sectional area of the second fluid recovery passage.

11. The floor brush assembly of claim 10, wherein: 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 S1/S2 is more than 2 and less than or equal to 10.

12. The floor brush assembly of claim 11, wherein: wherein S1/S2 is more than 5 and less than or equal to 10.

13. The floor brush assembly of claim 10, wherein: the second suction opening of the second fluid recovery passage is disposed adjacent to the second roll brush chamber but not within the second roll brush chamber.

14. The floor brush assembly of claim 13, wherein: the second suction opening of the second fluid recovery passage extends in a direction away from the bottom of the housing.

15. The floor brush assembly of claim 14, wherein: the second suction opening comprises at least a second suction opening leading wall and a second suction opening trailing wall.

16. The floor brush assembly of claim 15, wherein: a third scraping strip facing to the surface to be cleaned is fixedly arranged in the second suction port.

17. The floor brush assembly of claim 16, wherein: the third scraping strip 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 strip and used for installing the third scraping strip; the free end is positioned and dimensioned to have an interference or amount of clearance with the surface to be cleaned that enables a scraping action.

18. The floor brush assembly of claim 17, wherein: the second suction port is divided into two suction ports which are independent from each other by the arrangement of the third scraping strip, namely a second front suction port formed by the front wall of the second suction port and the third scraping strip and a second rear suction port formed by the rear wall of the second suction port and the third scraping strip.

19. The floor brush assembly of claim 18, wherein: the free end of the second suction opening front wall and/or the second suction opening rear wall is further from the surface to be cleaned than the free end of the third wiper strip.

20. The floor brush assembly of claim 19, wherein: the second front suction port is arranged in a direction away from the second rolling brush, and the second rear suction port 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.

21. The floor brush assembly of claim 20, wherein: the third scraping strip is made of soft materials, 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 port is increased, the sectional area of the second rear suction port is reduced, and the second front suction port forms a main suction port; 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.

22. The floor brush assembly of claim 13, wherein: the bottom plate is provided with a backflow preventing plate which can be selectively matched with the first rolling brush, and the backflow preventing plate can swing or deform under the influence of suction force when the ground brush assembly works.

23. The floor brush assembly of claim 22, wherein: the backflow preventing plate is formed in the first suction port of the first fluid recovery passage.

24. The floor brush assembly of claim 23, wherein: the backflow preventing plate can swing or deform to a working state with a larger gap formed between the backflow preventing plate and the first rolling brush under the influence of suction force when the ground brush assembly works, and can be in a backflow preventing state with the gap between the backflow preventing plate and the first rolling brush smaller than that in the working state when the ground brush assembly is in a non-working state.

25. The floor brush assembly of claim 24, wherein: the backflow prevention plate forms a sealing contact state with the first rolling brush when the backflow prevention plate is in a non-working state.

26. The floor brush assembly of claim 25, wherein: the backflow prevention plate comprises a fixed end fixedly connected with the bottom plate of the shell and a free end extending upwards towards the direction of the first rolling brush, and the free end is higher than the fixed end in the vertical direction.

27. The floor brush assembly of claim 22, wherein: a first scraping strip is arranged on a bottom plate behind the first rolling brush towards 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 port which enters a first fluid recovery channel arranged in the shell.

28. The floor brush assembly of claim 27, wherein: the first fluid recovery passage is provided on a front side of the main fluid recovery passage and is provided substantially horizontally from the first suction port to the first outlet.

29. The floor brush assembly of claim 28, wherein: the inlet of the main fluid recovery channel is in smooth butt joint with the first outlet of the first fluid recovery channel, and the main fluid recovery channel extends upwards and backwards in an inclined way from the inlet to the outlet.

30. The floor brush assembly of claim 29, wherein: the main fluid recovery channel is provided with a guide pipeline in a backward direction, an outlet of the guide pipeline is arranged on the rear side wall of the main fluid recovery channel, an inlet of the guide pipeline is in fluid connection with a second outlet of the second fluid recovery channel, and the guide pipeline extends downwards and backwards in an inclined manner from the outlet to the inlet.

31. The floor brush assembly of claim 30, wherein: the second fluid recovery channel comprises a second upper wall surface and a second lower wall surface, and the second lower wall surface is basically horizontal to the second half section of the guide pipeline.

32. The floor brush assembly of claim 31, wherein: the second lower wall surface is provided with at least one wedge-shaped bulge, the inclined side of the wedge-shaped bulge is arranged close to the second suction opening side, and the blocking side of the bulge is matched with the basically horizontal section of the second lower wall surface to form a second buffer part capable of preventing unwanted backflow.

33. The floor brush assembly of claim 32, wherein: a first buffer part with an opening facing to a first outlet of the first fluid recovery channel is arranged in the first fluid recovery channel; the first buffer portion is provided as an annular pipe protruding obliquely from an inner wall of the first fluid recovery passage toward the first outlet direction.

34. The floor brush assembly of claim 27, wherein: the floor brush assembly further comprises a first side brush, the rolling brush driving assembly drives the first rolling brush and the first side brush to rotate towards the same direction, and the first side brush is arranged on one side of the first side part far away from the first rolling brush chamber and at least a large part of the first side part of the shell is exposed out of the first side part of the shell.

35. The floor brush assembly of claim 34, wherein: the first side brush comprises a brush seat and brush hair arranged on the brush seat, and at least most of the brush seat is exposed outside the first side part of the shell.

36. The floor brush assembly of claim 35, wherein: the bristles are all exposed outside the first side of the housing.

37. The floor brush assembly of claim 36, wherein: the outer side wall of the first side part is convexly provided with an elastic anti-collision strip, and the elastic anti-collision strip is arranged at the rear of the first side brush.

38. The floor brush assembly of claim 37, wherein: the elastic anti-collision strip extends along the front-back direction of the outer side wall of the first side part, and the maximum setting thickness of the elastic anti-collision 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.

39. The floor brush assembly of claim 38, wherein: the first side brush is detachably mounted on one side of the first side portion.

40. The floor brush assembly of claim 37, wherein: 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 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 second driving head is matched with the first side brush at one side of the first side part far away from the first rolling brush chamber.

41. The floor brush assembly of claim 40, wherein: the first side brush is detachably mounted on the second drive head.

42. The floor brush assembly of claim 41, wherein: the first side brush is detachably arranged 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.

43. The floor brush assembly of claim 42, wherein: the first side brush is detachably arranged on the second driving head through magnetic attraction or elastic buckles.