CN220937916U - Surface cleaning device - Google Patents

Abstract

The utility model discloses a surface cleaning device, which belongs to the technical field of cleaning equipment and comprises a machine body provided with a dust collection opening and a cleaning cavity, a side brush assembly, a travelling mechanism, a dust collection assembly and a cleaning assembly, wherein the dust collection assembly comprises a dust collection fan and a dust box communicated with the dust collection opening, the cleaning assembly comprises a dirt collection fan, a roller brush arranged in the cleaning cavity and a sewage box communicated with the cleaning cavity, the dust box and the roller brush are distributed front and back, the cleaning cavity is offset relative to the machine body in the left-right direction so that the roller brush arranged in the cleaning cavity is adjacent to the side wall of the machine body, and the dust collection fan and the dirt collection fan are positioned on the same side of the machine body in the left-right direction and provide offset space for the cleaning cavity. The roller brush arranged in the cleaning cavity is offset relative to the machine body, so that one end part of the roller brush can be close to the side wall of the machine body, and therefore, the roller brush can wipe the surface to be cleaned close to the wall as much as possible when the device performs edge cleaning, and the cleaning effect is improved.

Description

Surface cleaning device

Technical Field

The utility model relates to the technical field of cleaning equipment, in particular to a surface cleaning device.

Background

Nowadays, a cleaning robot plays an increasingly important role in the daily life of people as one of intelligent household cleaning appliances. The existing sweeping and mopping integrated cleaning robot is provided with dust collection assemblies and wiping assemblies which are distributed back and forth, the dust collection assemblies firstly suck dirt such as hair, dust and the like on the ground into a dust box, then a roller brush of the wiping assemblies wipes the ground after absorbing liquid and wetting, and dirt liquid squeezed by scraping the roller brush can be sucked into the sewage box. In order to balance the left and right weight of the machine body, the blower of the dust collection assembly and the blower of the wiping assembly are generally arranged on the left and right sides of the machine body respectively, and the roller brush is arranged in the middle relative to the machine body. But this kind of overall arrangement structure makes the tip of roller brush far away from the lateral wall of organism, and when cleaning robot carried out along the limit cleaning, the roller brush can't clean the ground that is close to the wall body, influences the cleaning performance to the ground, is unfavorable for improving user's use and experiences.

Disclosure of utility model

In order to solve the defects and shortcomings in the prior art, the utility model provides a surface cleaning device, wherein a roller brush arranged in a cleaning cavity is offset relative to a machine body, so that one end part of the roller brush can be close to the side wall of the machine body, and therefore, the roller brush can wipe a surface to be cleaned close to a wall body as much as possible when the device performs edge cleaning, and the cleaning effect is improved.

In order to achieve the technical purpose, the surface cleaning device provided by the utility model comprises a machine body provided with a dust collection opening and a cleaning cavity, a side brush assembly, a travelling mechanism, a dust collection assembly and a cleaning assembly, wherein the dust collection assembly comprises a dust collection fan and a dust box communicated with the dust collection opening, the cleaning assembly comprises a dust collection fan, a roller brush arranged in the cleaning cavity and a sewage box communicated with the cleaning cavity, the dust box and the roller brush are distributed front and back, the cleaning cavity is offset relative to the machine body in the left-right direction so that the roller brush arranged in the cleaning cavity is adjacent to the side wall of the machine body, and the dust collection fan are positioned on the same side of the machine body in the left-right direction and provide offset space for the cleaning cavity.

Preferably, the dirt collecting fan and the cleaning cavity are positioned at the same position relative to the machine body in the front-rear direction.

Preferably, the cleaning assembly comprises a cleaning motor for driving the roller brush, the cleaning motor is arranged in the cleaning cavity and is positioned at one end opposite to the offset direction of the cleaning cavity, the roller brush is detachably arranged in the cleaning cavity, and the roller brush arranged in the cleaning cavity enables the cleaning motor to be inserted into the roller brush.

Preferably, the travelling mechanism comprises two travelling wheels which are symmetrically distributed in the middle of the machine body at intervals and a travelling motor for driving the travelling wheels, and the dust box and the dust suction fan are positioned between the two travelling wheels.

Preferably, the dust collection opening is arranged in the middle in the left-right direction relative to the machine body, the dust box is offset in the left-right direction relative to the machine body, and the dust collection fan is arranged on the side opposite to the offset direction of the dust box.

Preferably, the machine body is provided with a left and right central shaft surface, and the left and right central lines of the dust box are provided with an offset distance of 20-40 mm relative to the central shaft surface of the machine body.

Preferably, the body has a central axis surface centered right and left, the body being provided with a counterweight for balancing the weight such that the center of gravity of the surface cleaning apparatus is proximate the central axis surface.

Preferably, the balancing weight comprises at least a first balancing weight arranged on one side of the machine body, which is in the same direction as the offset direction of the cleaning cavity.

Preferably, the cleaning assembly comprises a clean water tank for supplying liquid to the roller brush, the cavity wall of the cleaning cavity is sequentially provided with a sewage suction port, a sewage scraping part and a spraying structure from back to front along the rotation direction of the roller brush, the sewage suction port is communicated with the sewage tank, the sewage scraping part is arranged at the upper edge of the sewage suction port, and the spraying structure is communicated with the clean water tank.

Preferably, the fresh water tank and the foul water tank are provided at the rear of the main body.

After the technical scheme is adopted, the utility model has the following advantages:

1. The multifunctional surface cleaning device provided by the utility model has the advantages that the dust suction fan and the dirt collection fan are arranged on the same side of the machine body in the left-right direction, so that sufficient offset space is provided for the cleaning cavity, the cleaning cavity can be offset in the left-right direction relative to the machine body, the roller brush arranged in the cleaning cavity can be arranged close to the side wall of the machine body, the distance between one end part of the roller brush and the side wall of the machine body is greatly reduced, the roller brush can wipe the surface to be cleaned close to the wall as much as possible when the device performs edge cleaning, the area of the surface to be cleaned, which cannot be effectively wiped when the device performs edge cleaning, is effectively reduced or eliminated, the cleaning effect of the surface to be cleaned is improved, and the use experience of a user is facilitated.

2. The dust collection fan and the dirt collection fan are arranged on one side opposite to the offset direction of the cleaning cavity, and the layout direction of the two fans relative to the cleaning cavity is reasonably set, so that the two fans can provide sufficient offset space for the cleaning cavity, and the cleaning cavity can also provide sufficient installation space for the two fans.

3. The dirt collecting fan and the cleaning cavity are located at the same position relative to the machine body in the front-rear direction, namely the dirt collecting fan and the cleaning cavity are arranged in a mode of being approximately aligned in the front-rear direction, the relative positions of the dirt collecting fan and the cleaning cavity are reasonably arranged, the inner space of the machine body is reasonably utilized, the dirt collecting fan can be arranged close to the cleaning cavity as much as possible, the flow path length of dirt collecting airflow can be reasonably shortened, and therefore the strength of the dirt collecting airflow is improved.

4. The cleaning motor for the driving roller brush is arranged in the cleaning cavity, the cleaning motor is inserted in the cleaning cavity when the roller brush is arranged in the roller brush, namely, the cleaning motor can be arranged in the roller brush, the transmission structure between the cleaning motor and the roller brush can be arranged in the roller brush, the layout position of the cleaning motor is reasonably arranged, the inner space of the machine body can be saved, the transmission space which needs to be reserved between the cleaning motor and the roller brush can be canceled, the length of the cleaning cavity is reasonably increased, the axial length of the roller brush is increased, and the cleaning efficiency of the cleaning assembly is improved.

5. The dust box and the dust collection fan are positioned between the two left and right walking wheels, the space between the two walking wheels is reasonably utilized to provide enough installation space for the dust box and the dust collection fan, the whole structure of the device is more compact, the dust collection fan is also arranged close to the dust box as much as possible, and the reasonable increase of the strength of dust collection airflow is facilitated.

6. The dust collection opening is arranged in the middle of the machine body, the dust box is offset relative to the machine body, the dust collection fan is arranged on one side opposite to the offset direction of the dust box, the layout direction of the dust collection opening, the dust box and the dust collection fan is reasonably arranged, the offset space of the dust box is utilized to provide enough installation space for the dust collection fan, so that the inner space of the machine body is reasonably utilized, and the dust collection fan is enabled to be communicated with the dust box when being arranged close to the dust box as much as possible.

7. The offset distance of the left and right central lines of the dust box relative to the middle shaft surface of the machine body is reasonably set, so that dirt such as hair, dust and the like can smoothly flow into the dust box while the installation requirement of the dust suction fan is met. If the offset distance is less than 20mm, the installation space on the side opposite to the offset direction of the dust box is smaller, which is not beneficial to meeting the installation requirement of the dust suction fan. If the offset distance is greater than 40mm, the offset distance between the dust box and the dust collection opening in the left-right direction is greater, and a channel for communicating the dust collection opening with the dust box may form a larger turning, the turning can weaken the intensity of dust collection airflow to a certain extent, and can block the flow of dirt such as hair, dust and the like to a certain extent, so that the dust collection effect is not beneficial to improvement.

8. The machine body is provided with the balancing weight, and the gravity center of the surface cleaning device is close to the middle shaft surface of the machine body as much as possible through the balancing weight, so that the weight of the surface cleaning device is kept balanced approximately left and right, the overall walking stability of the device is improved, and the dust collection effect of the dust collection assembly on the surface to be cleaned and the wiping effect of the cleaning assembly on the surface to be cleaned are improved.

9. The clean water tank supplies liquid to the roller brush through the spray structure, so that the roller brush can wet-wipe the surface to be cleaned after absorbing liquid and wetting. The scraping part scrapes the roller brush, and the scraped and extruded dirty liquid can flow to the sewage tank along with the dirt collecting airflow through the dirt absorbing port, so that the structure in the cleaning cavity is reasonably arranged, and the wiping effect of the roller brush on the surface to be cleaned is improved.

Drawings

FIG. 1 is a top view of an embodiment of a surface cleaning apparatus with a top cover removed;

FIG. 2 is a cross-sectional view of a portion of the structure of a surface cleaning apparatus of an embodiment taken along the front-to-rear direction;

FIG. 3 is a bottom view of an embodiment of a surface cleaning apparatus with the bottom cover removed;

fig. 4 is an exploded view of a portion of the components of a surface cleaning apparatus of an embodiment.

In the figure, 100-fuselage, 110-dust suction port, 120-cleaning cavity, 130-dirt suction port, 140-dirt scraping part, 150-spraying structure, 210-dust suction fan, 220-dust box, 230-suction port piece, 310-dirt collecting fan, 320-roller brush, 321-end cover, 330-sewage tank, 340-cleaning motor, 350-clean water tank, 410-universal wheel, 420-travelling wheel, 510-side brush, 520-side brush motor, 610-control board, 620-battery, 630-radar module, 640-infrared module and 700-first balancing weight.

Detailed Description

The utility model will be further described with reference to the drawings and the specific examples. It is to be understood that the terms "upper," "lower," "left," "right," "longitudinal," "transverse," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like, as used herein, are merely based on the orientation or positional relationship shown in the drawings and are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the devices/elements referred to must have or be configured and operated in a particular orientation and therefore should not be construed as limiting the utility model.

Example 1

Referring to fig. 1 to 4, a surface cleaning apparatus according to a first embodiment of the present utility model includes a main body 100 having a dust suction opening 110 and a cleaning chamber 120, an edge brush assembly, a traveling mechanism, a dust suction assembly and a cleaning assembly, wherein the dust suction assembly includes a dust suction fan 210 and a dust box 220 connected to the dust suction opening 110, and the cleaning assembly includes a dirt collection fan 310, a roller brush 320 disposed in the cleaning chamber 120 and a dirt box 330 connected to the cleaning chamber 120. The dust box 220 and the roller brush 320 are disposed in a front-to-rear direction, and the cleaning chamber 120 is offset in a left-to-right direction with respect to the main body 100 such that the roller brush 320 disposed in the cleaning chamber 120 is disposed adjacent to a sidewall of the main body 100, and the dust suction fan 210 and the dirt collection fan 310 are disposed on the same side of the main body 100 in the left-to-right direction and provide an offset space for the cleaning chamber 120.

The dust suction fan 210 and the dirt collection fan 310 are arranged on the same side of the machine body 100 in the left-right direction, so that sufficient offset space is provided for the cleaning cavity 120, the cleaning cavity 120 can be offset in the left-right direction relative to the machine body 100, the roller brush 320 arranged in the cleaning cavity 120 can be arranged close to the side wall of the machine body 100, the distance between one end part of the roller brush 320 and the side wall of the machine body 100 is greatly reduced, the roller brush 320 can wipe the surface to be cleaned close to the wall as much as possible when the device performs edge cleaning, the area of the surface to be cleaned, which cannot be effectively wiped when the device performs edge cleaning, is effectively reduced or eliminated, the cleaning effect of the surface to be cleaned is improved, and the use experience of a user is facilitated.

Referring to fig. 2 and 3, in this embodiment, a universal wheel 410 is disposed at the bottom side of the front end of the machine body 100, a travelling mechanism is disposed in the middle of the machine body 100, the travelling mechanism includes two travelling wheels 420 distributed in bilateral symmetry and travelling motors for driving the travelling wheels 420, the travelling motors are disposed in the machine body 100 and are disposed in two corresponding to the travelling wheels 420 one by one, and the two travelling motors are also distributed in bilateral symmetry. It will be appreciated that the road wheels 420 may be provided on the body 100 in a floating manner using prior art suspensions and springs in order to enhance the obstacle surmounting capability of the surface cleaning apparatus.

Referring to fig. 3, the main body 100 has a central axis P centered right and left, the dust suction fan 210 and the dirt collection fan 310 are disposed on the left side of the main body 100 to bias the cleaning chamber 120 rightward with respect to the central axis P, so that the roller brush 320 installed in the cleaning chamber 120 is biased rightward with respect to the central axis P, a minimum distance L1 between a right end of the roller brush 320 and a right side wall of the main body 100 is substantially smaller than a minimum distance L2 between a left end of the main body 100 and a left side wall of the main body 100, and a right end of the roller brush 320 is disposed adjacent to the right side wall of the main body 100. When the device is used for edge cleaning, the right side of the machine body 100 is abutted against the wall, so that the right end of the roller brush 320 faces the wall, and the roller brush 320 can effectively wipe the area of the surface to be cleaned, which is close to the wall.

Referring to fig. 1 and 3, the side brush assembly is disposed at the front portion of the machine body 100, and includes a side brush 510 and side brush motors 520 for driving the side brush 510, wherein the side brush 510 is disposed at the bottom side of the front portion of the machine body 100 and is provided with two side brush motors 520 in a bilateral symmetry manner, and the side brush motors 520 are disposed in the front portion of the machine body 100 and are provided with two side brush motors 510 in a one-to-one correspondence manner and are also distributed in a bilateral symmetry manner.

Referring to fig. 3, in the present embodiment, the dust collection opening 110 is disposed in the middle of the machine body 100 and is centered in the left-right direction relative to the machine body 100, and the dust box 220 and the dust collection fan 210 are disposed in the middle of the machine body 100 and are located between two travelling wheels 420. The space between the two travelling wheels 420 is utilized to provide enough installation space for the dust box 220 and the dust suction fan 210, so that the whole structure of the device is more compact, and the dust suction fan 210 is arranged close to the dust box 220 as much as possible, thereby being beneficial to reasonably increasing the strength of dust suction air flow. Specifically, the left and right center lines of the dust suction port 110 are located on the center axis plane P, the dust box 220 is offset rightward with respect to the main body 100, the dust suction fan 210 is disposed on the left side of the dust box 220, and the dust box 220 and the dust suction fan 210 are located at substantially the same position with respect to the main body 100 in the front-rear direction, that is, the distance between the dust box 220 and the dust suction fan 210 from the foremost end of the main body 100 is substantially the same. The machine body 100 is internally provided with a channel for communicating the dust collection opening 110 with the dust box 220, and when the dust collection fan 210 works, suction force is provided to form dust collection airflow flowing from the dust collection opening 110 and flowing into the dust box 220 through the channel, and dirt such as hair, dust and the like at the bottom of the device can flow into the dust box 220 along with the dust collection airflow, so that the dust collection purpose is realized. It will be appreciated that the suction opening 110 may be provided directly on the bottom wall of the main body 100, or the suction opening 230 may be provided on the bottom wall of the main body 100, and the suction opening 110 may be provided on the suction opening 230.

The straight line M in FIG. 3 represents the left and right centerlines of the dust box 220. In this embodiment, the left and right centerlines M of the dust box 220 are offset to the right with respect to the center axis plane P of the body 100 by an offset distance L3, 20mm < L3 < 40mm. The offset distance L3 of the left and right central lines M of the dust box 220 relative to the central axis P of the machine body is reasonably set, so that dirt such as hair, dust and the like can smoothly flow into the dust box 220 through the channel while the installation requirement of the dust suction fan 210 is met. Specifically, the offset distance L3 is about 28mm. It will be appreciated that the offset distance L3 may be set to other reasonable dimensions of 20mm, 22mm, 24mm, 26mm, 27mm, 29mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, etc., depending on the physical dimensions of the dust box 220 and the suction fan 210.

The cleaning assembly is provided at the rear of the body 100, the cleaning chamber 120 is provided at the rear of the body 100 with an open bottom side, and the cleaning assembly further includes a cleaning motor 340 for driving the roller brush 320. In order to save the internal space of the machine body 100, in this embodiment, the cleaning motor 340 is disposed in the cleaning chamber 120 and is located at an end opposite to the offset direction of the cleaning chamber 120, the roller brush 320 is detachably mounted in the cleaning chamber 120, and the roller brush 320 mounted in the cleaning chamber 120 allows the cleaning motor 340 to be inserted into the roller brush 320. Specifically, the left end of the cleaning cavity 120 is closed, the right end is open, the cleaning motor 340 is arranged at the left end of the cleaning cavity 120, the output end of the cleaning motor 340 is provided with a transmission head, the inside of the roller brush 320 is provided with a transmission hole matched with the transmission head, and the right end of the roller brush 320 is provided with an end cover 321 for closing the right end of the cleaning cavity 120. When the roller brush 320 is inserted into the cleaning cavity 120 from right to left when being arranged in the cleaning cavity 120, the transmission head is inserted into the transmission hole when the roller brush 320 is inserted into place, the end cover 321 is inserted into the right end of the cleaning cavity 120, and the cleaning motor 340 rotates through the cooperation of the transmission head and the transmission hole when working. It will be appreciated that other reasonable drive arrangements between the cleaning motor 340 and the roller brush 320 may be used. It will be appreciated that the roller brush 320 may also be mounted in the cleaning chamber 120 in a non-removable manner. It will be appreciated that the cleaning motor 340 and the transmission structure for transmitting power may be provided in the body 100 if the interior space of the body 100 is sufficient. It will be appreciated that a snap-fit structure may be provided between the end cap 321 and the right end of the cleaning chamber 110 to limit the roller brush 320 mounted within the cleaning chamber 110.

Referring to fig. 1 and 2, the cleaning assembly of the present embodiment further includes a clean water tank 350 for supplying liquid to the roller brush 320, the wall of the cleaning chamber 120 is sequentially provided with a sewage suction port 130, a sewage scraping portion 140 and a spraying structure 150 from back to front along the rotation direction of the roller brush 320, the sewage suction port 130 is communicated with the sewage tank 330, the sewage scraping portion 140 is disposed at the upper edge of the sewage suction port 130, and the spraying structure 150 is communicated with the clean water tank 350. In this embodiment, when the cleaning motor 340 is operated, the driving roller brush 320 rotates clockwise along the direction ω shown in fig. 2, the dirt absorbing port 130 is disposed at the obliquely upper rear of the cleaning chamber 120, the front edge of the dirt absorbing port 130 is slightly higher than the rear edge, the dirt scraping portion 140 is disposed at the front edge of the dirt absorbing port 130, the spraying structure 150 is disposed at the obliquely upper front of the cleaning chamber 120 and is provided with a water outlet toward the roller brush 320, the spraying structure 150 is connected to the clean water tank 350 via a pipeline, and a pump is disposed on the pipeline. The liquid in the clean water tank 350 can flow to the spraying structure 150 through a pipeline under the pumping action of the pump, the liquid flowing into the spraying structure 150 is sprayed to the roller brush 320 from the water outlet, so that the roller brush 320 can absorb liquid and wet, the dirt scraping part 140 scrapes the roller brush 320, and the dirt liquid scraped by the roller brush 320 can flow to the sewage tank 330 through the dirt suction opening 130 along with the dirt collecting airflow. The fresh water tank 350 and the foul water tank 330 are provided at the rear of the main body 100, and in particular, the fresh water tank 350 and the foul water tank 330 are positioned at the top of the cleaning chamber 120, and a sufficient installation space is provided for the fresh water tank 350 and the foul water tank 330 by using the space of the main body 100 positioned at the top of the cleaning chamber 120. It is understood that the dirt scraping portion 140 may use a scraping bar, a scraping tooth, or a combination of the scraping bar and the scraping tooth. It will be appreciated that the spray structure 150 may be implemented using existing water distribution members, nozzles, or a combination of spray channels. It will be appreciated that the fresh water tank 350 and the foul water tank 330 may be integrally distributed up and down at the rear of the main body 100.

In this embodiment, the sump 330 is offset rightward with respect to the main body 100, the sump blower 310 is located at the left side of the sump 330 and the cleaning chamber 110, and the sump blower 310 and the cleaning chamber 110 are located at the same position with respect to the main body 100 in the front-rear direction, that is, the distance between the sump blower 310 and the cleaning chamber 110 from the foremost end of the main body 100 is substantially identical. The dirt collecting fan 310 can be arranged as close to the cleaning cavity 110 as possible while reasonably utilizing the internal space of the machine body 100, and the flow path length of the dirt collecting airflow can be reasonably shortened, so that the strength of the dirt collecting airflow is improved.

In this embodiment, the body 100 has a center axis surface centered right and left, and the body 100 is provided with a weight for balancing the weight so that the center of gravity of the surface cleaning apparatus is close to the center axis surface. The weight of the surface cleaning apparatus is kept balanced as much as possible by the weight of the weight block to bring the center of gravity of the apparatus as close as possible to the center axis P of the main body 100.

Referring to fig. 1, in this embodiment, the balancing weights include at least a first balancing weight 700 disposed on the same side of the main body 100 as the offset direction of the cleaning chamber 110. Because the dust suction fan 210 and the dirt collecting fan 310 are arranged on the opposite side of the machine body to the offset direction of the cleaning cavity 110, the gravity center of the machine body 100 is deviated to the installation side of the dust suction fan 210 and the dirt collecting fan 310, and the weight of the dust suction fan 210 and the dirt collecting fan 310 can be balanced through the first balancing weight 700, so that the weight of the machine body 100 is kept balanced approximately left and right.

When the surface cleaning apparatus works, the side brush motor 520 drives the side brush 510 to rotate to clean the surface to be cleaned, and the dust suction fan 210 provides suction force to form dust suction airflow flowing from the dust suction opening 110 to the dust box 220, so that dirt such as hair, dust and the like at the bottom of the apparatus flows to the dust box 220 through the dust suction opening 110. The clean water tank 350 supplies liquid to the roller brush 320 to enable the roller brush 320 to absorb the liquid and wet, the cleaning motor 340 drives the roller brush 320 to rotate to wipe the surface to be cleaned, the dirt scraping part 140 scrapes and squeezes the roller brush 320, the dirt collecting fan 310 provides suction force to form dirt collecting air flow from the dirt suction port 130 to the sewage tank 330, and the dirt liquid scraped and squeezed by the dirt scraping part 140 of the roller brush 320 flows into the sewage tank 330 along with the dirt collecting air flow.

When the surface cleaning device performs edge cleaning, the right side of the device faces the wall body, so that the right end of the roller brush 320 is close to the wall body, the roller brush 320 can effectively wipe the surface to be cleaned, which is close to the wall body, the area of the surface to be cleaned, which cannot be effectively wiped when the device performs edge cleaning, is effectively reduced or eliminated, and the cleaning effect of the surface to be cleaned is improved.

It will be appreciated that the cleaning assembly and the cleaning assembly may be activated simultaneously or alternatively when the apparatus is in operation.

It can be appreciated that other structures of the surface cleaning apparatus may refer to an existing cleaning robot, such as the radar module 630 and the infrared module 640 disposed at the front end of the main body 100, and the surface cleaning apparatus further includes a control board 610 and a battery 620 disposed in the main body 100, which are not described in detail in this embodiment.

It will be appreciated that the provision of the counterweight may be eliminated, with the components of the surface cleaning apparatus itself being such that the left and right weights of the apparatus are substantially balanced.

It will be appreciated that the cleaning chamber 120 may also be offset to the left with respect to the main body 100, in which case the suction fan 210 and the dirt collection fan 310 are located on the right side of the main body 100.

In addition to the above preferred embodiments, the present utility model has other embodiments, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the utility model, which shall fall within the scope of the utility model as defined in the appended claims.

Claims (10)

1. The utility model provides a surface cleaning device, includes fuselage, limit brush subassembly, running gear, dust absorption subassembly and the clean subassembly that is equipped with dust absorption mouth and clean chamber, and dust absorption subassembly includes dust collection fan and communicates in the dirt box of dust absorption mouth, and clean subassembly includes dirt collection fan, locates the roller brush in the clean chamber and communicates in the dirty water tank in clean chamber, a serial communication port, dust box and roller brush front and back distribute, and clean chamber offset in the left and right directions for the fuselage so that locate the lateral wall setting of adjacent fuselage of roller brush in clean chamber, dust collection fan and dirt collection fan are located the homonymy of fuselage and provide offset space for clean chamber in the left and right directions.

2. A surface cleaning apparatus as claimed in claim 1, wherein the dirt collecting fan is co-located with the cleaning chamber in a forward and rearward direction relative to the main body.

3. A surface cleaning apparatus as claimed in claim 1, wherein the cleaning assembly includes a cleaning motor for driving the roller brush, the cleaning motor being disposed in the cleaning chamber at an end opposite the direction of the cleaning chamber offset, the roller brush being removably mounted in the cleaning chamber, the roller brush being mounted in the cleaning chamber such that the cleaning motor is inserted into the roller brush.

4. The surface cleaning apparatus of claim 1 wherein the travelling mechanism comprises two laterally symmetrical travelling wheels spaced apart from the central portion of the main body and a travelling motor for driving the travelling wheels, the dust box and the dust suction fan being located between the two travelling wheels.

5. The surface cleaning apparatus of claim 4 wherein the suction opening is centered in a left-right direction relative to the body, the dust box is offset in the left-right direction relative to the body, and the suction fan is disposed on a side opposite the offset direction of the dust box.

6. A surface cleaning apparatus as claimed in claim 5, wherein the main body has a left and right central axis, and the left and right centre lines of the dust box have an offset distance of 20mm to 40mm relative to the central axis of the main body.

7. A surface cleaning apparatus as claimed in claim 1, wherein the main body has a central axis surface centered right and left, and the main body is provided with a counterweight for balancing the weight so that the center of gravity of the surface cleaning apparatus is close to the central axis surface.

8. The surface cleaning apparatus of claim 7 wherein the weight includes at least a first weight disposed on the same side of the body as the cleaning chamber is offset.

9. The surface cleaning apparatus of claim 1, wherein the cleaning assembly comprises a clean water tank for supplying liquid to the roller brush, the cleaning chamber wall is sequentially provided with a dirt sucking port, a dirt scraping portion and a spraying structure from back to front along the rotation direction of the roller brush, the dirt sucking port is communicated with the sewage tank, the dirt scraping portion is arranged at the upper edge of the dirt sucking port, and the spraying structure is communicated with the clean water tank.

10. A surface cleaning apparatus as claimed in claim 8, wherein the fresh water tank and the foul water tank are provided at the rear of the main body.