Surface cleaning device capable of being cleaned in flat-lying mode

Abstract

The utility model belongs to the technical field of cleaning equipment, and particularly provides a surface cleaning device capable of cleaning in a flat lying mode, which comprises a water supply system, a dirt suction system, a machine body and a floor brush hinged with the machine body, the dirt suction system comprises a vacuumizing fan, a sewage bucket with a dirt inlet pipe and a dirt suction channel, and the floor brush is provided with a dirt suction port, a water supply port and a cleaning assembly. The vacuumizing fan is arranged on the machine body; the machine body is flat and rotates to a lying state relative to the ground brush, the upper surface of the machine body and the upper surface of the ground brush enter a flush state, and the height difference between the machine body and the ground brush is within 0.8 cm.

Description

Technical Field

[0001] The utility model belongs to the technical field of cleaning appliances, and specifically provides a surface cleaning device capable of lying flat for cleaning. Background Art

[0002] The existing surface cleaning device generally includes a machine body, a floor brush, a clean water tank and a sewage bucket. The floor brush is provided with a sewage suction port and a cleaning component. The clean water tank supplies liquid to the cleaning component. The suction airflow formed by the fan provides suction force and can suck the dirt into the sewage bucket through the sewage suction port of the floor brush. The clean water tank and the sewage bucket are respectively provided on the front and rear sides of the lower part of the machine body, and the power source component including the fan is provided on the upper part of the machine body.

[0003] In order to clean the floor in low spaces such as under the bed or sofa, technicians generally design the floor brush of the surface cleaning device to be thinner, such as not higher than 100 cm, to facilitate the entry of the floor brush. At the same time, in order to facilitate the support of the customer, the body of the surface cleaning device can be rotated backward at a larger angle relative to the floor brush to a lying state (such as 150°, 170° or 180° lying flat). When the body is in the lying working state, the angle between the body and the floor to be cleaned is basically 180 degrees.

[0004] A clean water tank and a sewage tank are generally installed on the fuselage. In order to meet the cleaning requirements of general household floors, the capacity of the two tanks must be guaranteed. For this reason, technicians generally design the fuselage into a cylindrical structure or a semi-elliptical shape that bulges forward from the fuselage shell. The upper and lower height values ​​D1 of the fuselage when lying flat are still much higher than the height D2 of the floor brush. Moreover, due to the limited length of the floor brush, the fuselage still cannot reach into the corner under a shorter bed for cleaning. Utility Model Content

[0005] The purpose of the utility model is to provide a surface cleaning device that can lie flat for cleaning, which can balance the installation size requirements of various components on the body and the height requirements of the body when lying flat, so as to utilize the characteristic that the height of the body when lying flat is basically flush with the height of the floor brush to improve the convenience of cleaning and adapt to the cleaning of lower spaces.

[0006] In order to achieve the above-mentioned purpose, one or more embodiments of the utility model provide a surface cleaning device that can be laid flat for cleaning, including a water supply system, a sewage suction system, a body, and a floor brush hinged therewith, the sewage suction system including a vacuum fan, a sewage bucket with a sewage inlet pipe, and a sewage suction channel, the floor brush is provided with a sewage suction port, a water supply port, and a cleaning component, and the body is provided with a vacuum fan. The body is flat, and the body rotates relative to the floor brush to a lying state, and the upper surface of the body and the upper surface of the floor brush enter a flush state, and the height difference between the two is within 0.8 cm.

[0007] In at least one embodiment, the height of the rear portion of the floor brush is higher than the height of the front portion of the floor brush.

[0008] In at least one embodiment, the height of the floor brush gradually increases from the front to the rear, and the upper surface of the body is flush with the highest point of the rear of the floor brush; or, the highest point of the rear of the floor brush is higher than the upper surface of the body by less than 0.6 cm; or, the upper surface of the body is higher than the highest point of the rear of the floor brush by 0.1 cm to 0.8 cm.

[0009] In at least one embodiment, a battery pack, a control component, and a vacuum blower are provided in the fuselage, and the battery pack is arranged on the left and right sides of the vacuum blower to form a power source component, so that the power source component is flat and the thickness in the front-to-back direction is less than the width in the left-to-right direction.

[0010] In at least one embodiment, the fuselage includes a rear shell and a front shell snapped onto the rear shell, the upper portion of the rear shell is recessed outward to form a first installation cavity, the power source component and the control component are installed in the first installation cavity, the lower portion of the rear shell is provided with an inward recess to form a second installation cavity, the sewage bucket is installed in the second installation cavity, and the sewage bucket is smoothly connected to the outer surface of the rear shell and is flush with it.

[0011] In at least one embodiment, when the fuselage is in a lying state, the central axis of the power source assembly is arranged not higher than the central axis of the fuselage.

[0012] In at least one embodiment, the control component does not protrude from the first installation cavity, and the printed circuit board of the control component is not higher than the central axis plane of the fuselage.

[0013] In at least one embodiment, the fuselage is in a flat state, the overall external shape formed by the sewage bucket and the rear shell is a boat shape, and auxiliary running wheels are provided on the upper part of the rear shell.

[0014] In at least one embodiment, the water supply system includes a water tank and a water supply pipeline, the floor brush includes a lower shell, a accommodating chamber is provided on the lower shell, the cleaning component is arranged at the front end of the outer side of the accommodating chamber, the water tank is arranged in the accommodating chamber, and the upper port of the accommodating chamber is arranged to gradually increase from front to back.

[0015] In at least one embodiment, a roller brush cover is provided above the cleaning assembly, and a downward guiding surface is provided at the front end of the roller brush cover.

[0016] Beneficial effects of one or more of the above technical solutions:

[0017] (1) Compared with the cylindrical structure of the fuselage in the prior art: in this solution, the fuselage is flat and after the fuselage rotates to a flat position relative to the floor brush, the upper surface of the fuselage and the upper surface of the floor brush are flush with each other, and the height difference between the two is within 0.8 cm. This setting method takes advantage of the flatness of the fuselage. The width of the fuselage in the left and right directions is not restricted, which makes it easy to use the left and right dimensions of the fuselage to make up for the size of the internal installation space of the entire fuselage when the thickness of the fuselage in the front and back directions is reduced. That is, this solution makes it easy to balance the thickness of the fuselage in the front and back directions and the installation space required for the internal parts of the fuselage. In addition, the height difference between the two is designed to be within 0.8 cm to prevent the fuselage from affecting the user's line of sight, so that customers can observe the dirtiness in the low space and whether it is clean, and whether to turn to clean another area after cleaning one area.

[0018] In addition, in the present solution, the height difference between the body and the floor brush in the flush state is within 0.8 cm. On the one hand, this arrangement can make the heights of the floor brush and the body roughly equal when lying flat, and will not affect the minimum value of the low space that the entire surface cleaning device can adapt to due to the body or the floor brush being too high; on the other hand, the height difference between the body and the floor brush is a range value, which is convenient for reducing the difficulty of production and processing, and reduces the difficulty of dimensional design of the body and the floor brush when thinning, and can reduce the air resistance of the body when it is pushed, pulled and turned forward and backward, making the movement of the body and even the entire surface cleaning device smoother.

[0019] In this solution, the fuselage is a flat structure, and the fuselage rotates to a flat state relative to the floor brush, and the upper surface of the fuselage is flush with the upper surface of the floor brush. This setting makes the fuselage low. The lower the fuselage, the less airflow will pass over the fuselage when it enters a low space, which will reduce air resistance and provide customers with better control performance. In addition, the floor brush and the fuselage will form wind-breaking surfaces when moving forward and backward, reducing the wind resistance coefficient of the surface cleaning device when it is lying flat, making its movement process smoother and reducing the difficulty of operation for users.

[0020] Finally, the flat design of the fuselage makes it easier to lower the center of gravity when lying flat. The low center of gravity design helps reduce air resistance, thereby improving the operating performance and efficiency of the surface cleaning device. When the surface cleaning device is cleaning a low space, there is less airflow under the fuselage, reducing resistance and improving the balance of the fuselage.

[0021] (2) In this solution, the height of the rear part of the floor brush is higher than the height of the front part of the floor brush. In this arrangement, the height of the front part of the floor brush is relatively low, so that the area of ​​the wind-breaking surface of the front part of the floor brush facing the forward direction is small, which is convenient for reducing the wind resistance coefficient of the floor brush and even the entire surface cleaning device. In addition, this arrangement is also convenient for using the relatively low part of the front part of the floor brush to guide the entire floor brush into a low space for cleaning.

[0022] (3) In this solution, the height of the floor brush gradually increases from the front to the rear, and the upper surface of the body is set flush with the highest point of the rear of the floor brush; or, the highest point of the rear of the floor brush is within 0.6 cm higher than the upper surface of the body; or, the upper surface of the body is 0.1 cm to 0.8 cm higher than the highest point of the rear of the floor brush. This arrangement facilitates the formation of a guide surface that gradually rises from the front end to the rear end of the floor brush at the floor brush, and the highest point of the guide surface is flush with the upper surface of the body when it is balanced, or is 0.1 to 0.8 cm lower than the upper surface of the body, or is within 0.6 cm higher than the body; and the guide surface can fully guide the airflow at the front end of the floor brush backward to the top of the floor brush, so as to further reduce the wind resistance when the floor brush moves. And the airflow guided to the rear of the floor brush will basically not form a large airflow obstruction at the front end of the body when it is lying flat, and will not excessively affect the flexibility of the body operation due to the existence of airflow resistance.

[0023] (4) In this solution, the battery pack is arranged on the left and right sides of the vacuum blower to form a power source assembly, so that the power source assembly is flat in shape with a thickness in the front-to-back direction that is smaller than the width in the left-to-right direction. This arrangement makes the power source assembly also a flat structure that is small in the front-to-back direction and large in the left-to-right direction, which is convenient for reducing the space occupied by the power source assembly in the front-to-back direction of the fuselage, and then it is convenient to reduce the front-to-back thickness of the upper part of the fuselage to adapt to the cleaning of a lower space.

[0024] (5) In this solution, the fuselage includes a rear shell and a front shell that is snapped onto the rear shell. The upper portion of the rear shell is recessed outward to form a first installation cavity. The power source assembly and the control assembly are installed in the first installation cavity. The lower portion of the rear shell is provided with an inward recess to form a second installation cavity. The sewage bucket is installed in the second installation cavity. The sewage bucket is smoothly connected to the outer surface of the rear shell and is arranged flush. This arrangement makes it easy to install the power source assembly and the sewage bucket from the front and rear sides of the rear shell respectively, so as to separate the two during installation, avoid sewage in the sewage bucket from leaking to the position of the power source assembly, and avoid the power source assembly from contacting with sewage and being damaged by a short circuit. In addition, this arrangement makes it easy to place the power source assembly above the sewage bucket, thereby making it easy to place the sewage bucket flush with the outer surface of the rear shell.

[0025] (6) In this solution, when the fuselage is in a flat state, the central axis of the power source assembly is not higher than the central axis of the fuselage. This arrangement facilitates further lowering the overall center of gravity height of the fuselage in a flat state, thereby improving the convenience of fuselage operation.

[0026] (7) In this solution, the control assembly does not protrude from the first installation cavity, and the printed circuit board of the control assembly is not higher than the central axis of the fuselage. This arrangement makes it easy for the control assembly to be in the first installation cavity, and most of the structure of the control assembly is located below the central axis of the fuselage when the fuselage is lying flat; thus, the structural arrangement of the control assembly makes it easy to further reduce the center of gravity height of the fuselage in the lying state, thereby improving the convenience of fuselage operation.

[0027] (8) In this solution, the body is in a flat position, the sewage bucket and the rear shell form a boat-shaped overall external shape, and the upper part of the rear shell is provided with auxiliary running wheels. This arrangement facilitates the formation of multiple inclined guide surfaces at the rear shell, and the inclined guide surfaces at the front shell can reduce the wind resistance borne by the rear shell when it moves forward and backward and turns, thereby improving the flexibility of the surface cleaning device when it moves.

[0028] When the machine body is in a flat position, the auxiliary wheels can be supported between the machine body and the floor to be cleaned. First, the auxiliary wheels can be used to support the machine body, reduce the user's operating load, and improve the smoothness of the machine body when pushing and pulling forward and backward and turning. Second, the auxiliary wheels can prevent friction between the lower part of the machine body and the floor to be cleaned, thereby preventing friction damage to the outer surface of the machine body.

[0029] (9) In this solution, the water supply system includes a water tank and a water supply pipeline, the floor brush includes a lower shell, the lower shell is provided with a receiving chamber, the cleaning component is arranged at the front end of the outer side of the receiving chamber, the water tank is arranged in the receiving chamber, and the upper end of the receiving chamber is arranged to gradually increase from front to back. This arrangement transfers the water tank from the body to the floor brush, which is conducive to realizing the flat design of the body, thereby reducing the height of the body when lying flat and finally entering a flush state with the floor brush.

[0030] (10) In this solution, a roller brush cover is provided above the cleaning assembly, and a downward guide surface is provided at the front end of the roller brush cover. This arrangement utilizes the downward guide surface provided at the roller brush cover to achieve wind-breaking when the floor brush moves, thereby reducing the air assist when the body moves forward and backward, thereby improving the flexibility of the surface cleaning device when in motion. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Some embodiments of the present application are described below with reference to the accompanying drawings, in which:

[0032] Figure 1 This is a schematic diagram of the overall structure axonometrically in the embodiment of the utility model;

[0033] Figure 2 It is a schematic diagram of the height of the floor brush higher than the body in the embodiment of the utility model;

[0034] Figure 3 It is a schematic diagram of an embodiment of the utility model in which the body is higher than the floor brush;

[0035] Figure 4 It is a schematic diagram of an embodiment of the utility model in which the body and the floor brush are at the same height;

[0036] Figure 5 It is a side view of a floor brush in an embodiment of the utility model;

[0037] Figure 6 It is an axonometric diagram of the rear housing in the embodiment of the utility model;

[0038] Figure 7 is an axonometric schematic diagram of another viewing direction of the rear housing in an embodiment of the utility model;

[0039] Figure 8 is a cross-sectional view of the rear housing in an embodiment of the utility model;

[0040] Fig. 9 This is a front view of the overall structure of the embodiment of the utility model after removing the front shell;

[0041] Fig.10 It is a schematic diagram of the overall structure of the embodiment of the utility model after removing the front shell and the power source assembly;

[0042] Fig.11 It is an axonometric schematic diagram of a power source assembly in an embodiment of the utility model;

[0043] Fig.12 It is a schematic diagram of the front shell in the embodiment of the utility model.

[0044] Figure numerals: 1. handle; 2. handle bar; 3. body; 31. front shell; 311. front wall; 312. side wall; 32. rear shell; 321. second installation cavity; 322. first installation cavity; 323. rear wall; 324. front wall; 325. partition; 4. floor brush; 5. clean water tank; 6. cleaning component; 7. sewage bucket; 8. power source component; 81. circuit drive board; 82. battery pack; 83. vacuum blower; 9. control component. DETAILED DESCRIPTION

[0045] Those skilled in the art should understand that the embodiments described below are merely preferred embodiments of the present application, which are merely used to explain the technical principles of the present application and are not used to limit the protection scope of the present application.

[0046] It should be noted that in the description of this application, the terms "center", "upper", "lower", "top", "bottom", "vertical", "horizontal", "inner", "outer" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0047] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] The surface cleaning device in the present application may be a carpet cleaning machine, a desktop cleaner, a sweeping and mopping robot, or other devices used for cleaning.

[0049] like Figure 1-Figure 12 As shown, one or more embodiments of the present embodiment provide a surface cleaning device capable of lying flat for cleaning, including a water supply system, a sewage suction system, a body 3 and a floor brush 4 hinged thereto, the sewage suction system including a vacuum blower 83, a sewage bucket 7 with a sewage inlet pipe and a sewage suction channel, the floor brush 4 is provided with a sewage suction port, a water supply port and a cleaning component 6, and the body 3 is provided with a vacuum blower 83. The body 3 is flat, and the body 3 rotates to a lying state relative to the floor brush 4, and the upper surface of the body 3 and the upper surface of the floor brush 4 enter a flush state, and the height difference between the two is within 0.8 cm.

[0050] Specifically, in this embodiment, the height of the body 3 in the lying state is 8.7cm-9.1cm. Preferably, the height of the body 3 in the lying state is 8.9cm, and the height difference between the two is 0.5cm, that is, the height of the highest point of the floor brush 4 is 8.85cm. At this height value, the body 3 can maintain a flat thickness value with a small value, and can meet the installation of the sewage bucket 7 and the power source components 8 such as the fan. At the same time, the body 3 can enter the low space that the floor brush 4 can enter, so that the surface cleaning device can enter the deep low space for effective cleaning.

[0051] In order to achieve that the body 3 can be flush with the floor brush 4 after lying flat, the body 3 is arranged as follows Figure 1The flat structure shown, that is, the thickness of the fuselage 3 in the front-to-back direction is small when it is upright, and the width value of the left and right is large. At this time, the flat fuselage 3 structure can meet the height requirements of the fuselage 3 after lying flat, and can also use its own large left and right width to meet the installation requirements of the parts in the fuselage 3.

[0052] In this embodiment, the fuselage 3 is a flat structure, and the fuselage 3 rotates to a flat state relative to the floor brush 4, and the upper surface of the fuselage 3 is flush with the upper surface of the floor brush 4. This arrangement makes the fuselage 3 low. The lower the fuselage 3 is, the less airflow passes over the fuselage 3 when it enters a low space, which will reduce air resistance and provide customers with better control performance. In addition, the floor brush 4 and the fuselage 3 will form wind-breaking surfaces when moving forward and backward, reducing the wind resistance coefficient of the surface cleaning device when it is lying flat, making its movement process smoother and reducing the difficulty of operation for users.

[0053] When lying flat, the center of gravity of the flat body 3 is lower, and the bucket and even the body 3 are closer to the surface to be cleaned, which can optimize the weight distribution and lower the center of gravity. In particular, it can make the floor brush 4 easier to turn, making it easier for customers to control the surface cleaning device to perform comprehensive cleaning of the surface to be cleaned, not just to move in a straight line, avoiding the inconvenience of turning. In addition, this design also enhances the downward force of the body 3 when lying flat. The low center of gravity helps to generate negative pressure at the bottom of the body 3, thereby increasing the downward force of the body 3 and the floor brush 4, so that the floor brush 4 and the body 3 can be closer to the ground and improve stability. In addition, the flatness of the body 3 also reduces the visual height of the body 3, so that customers can observe the moving route of the floor brush 4 and the environmental condition and dirtiness, so as to carry out targeted and efficient cleaning.

[0054] The height difference between the body 3 and the floor brush 4 is designed to be within 0.8 cm, which can prevent the body 3 from affecting the user's line of sight, making it easier for customers to observe the dirtiness of low spaces and whether they are clean, and whether they need to turn to clean another area after cleaning one area.

[0055] Specifically, a lighting device is generally provided on the front side of the floor brush 4 to better observe the dirt status and whether the dirt has been cleaned or not. It is also convenient to observe whether the liquid level electrode alarm is caused by a surge in the liquid level caused by the shaking of the body 3, which leads to a misjudgment.

[0056] In at least one embodiment, the height of the rear portion of the floor brush 4 is higher than the height of the front portion of the floor brush 4. Figure 4, along the direction from front to back, the height of the floor brush 4 gradually increases and forms an inclined surface on the upper surface of the fuselage 3. The plane where the highest point of the front end of the floor brush 4 is located is L3 shown in the figure, and the plane where the highest point of the rear end of the brush is located is L2 shown in the figure. In this arrangement, the front height of the floor brush 4 is relatively low, so that the area of ​​the wind-breaking surface of the front part of the floor brush 4 facing the forward direction is smaller, which is convenient for reducing the wind resistance coefficient of the floor brush 4 and even the entire surface cleaning device. In addition, this arrangement is also convenient for using the relatively low part of the front part of the floor brush 4 to guide the entire floor brush 4 into a low space for cleaning. Alternatively, the upper surface of the floor brush 4 can be two step surfaces (not shown in the figure), of which the lower step surface is at Figure 4 Directly above the front cleaning assembly 6 of the floor brush 4 shown, another higher plane is located above the rear running wheels of the floor brush 4; the two step surfaces are connected by a vertical surface or an inclined surface.

[0057] In this embodiment, see Figure 2 When the body 3 is in a lying state, the plane where the highest point L2 of the rear of the floor brush 4 is located is within 0.6 cm higher than the plane where the highest point L1 of the upper surface of the body 3 is located.

[0058] As an alternative, see Figure 3 , the plane where the highest point of the body 3 is located is L1, the plane where the highest point of the floor brush 4 is located is L2, and the height difference between the two is D = L1-L2; the value of D is 0.1cm-0.8cm. That is, the body 3 is not completely at the same height as the floor brush 4 when lying flat. As another alternative structural form, see Figure 4 The upper surface of the fuselage 3 is flush with the highest point of the rear of the floor brush 4; the planes where the highest points of the fuselage 3 and the floor brush 4 are located are both L0, and there is no height difference between the two, that is, the fuselage 3 is at the same height as the floor brush 4 in a lying state.

[0059] That is to say, the flush state in this embodiment means that in the flat state, the height of the body 3 is not higher than the height of the floor brush 4 by 0.8 cm. It is not strictly required that the floor brush 4 and the body 3 in the flat state are of the same height.

[0060] In the present application, while reducing the height of the fuselage 3 when lying flat, the size of the inner cavity of the fuselage 3 in the left and right directions will also be reduced by a large value, which will cause insufficient installation space in the inner cavity of the fuselage 3; in addition, the height of the fuselage 3 when lying flat is designed to be equal to the height of the floor brush 4, which has greater requirements on the size and installation position of each component inside the fuselage 3, which will cause inconvenience in design and production installation. In order to facilitate the installation of various components in the flat fuselage 3, in this embodiment, a battery pack, a control component 9, and a vacuum fan 83 are provided in the fuselage 3. The battery pack is arranged on the left and right sides of the vacuum fan 83 to form a power source component 8, so that the power source component 8 is flat in shape with a thickness in the front-to-back direction less than the width in the left-to-right direction.

[0061] In this embodiment, there are multiple battery packs, which are symmetrically arranged on the left and right sides of the vacuum blower 83. Preferably, two battery packs are respectively arranged on the left and right sides of the vacuum blower 83. In the case where the power source assembly 8 is arranged in a flat shape, it is convenient to reduce the height of the power source assembly 8 when the fuselage 3 lies flat, which is conducive to achieving a flush state between the fuselage 3 and the floor brush 4 when the fuselage 3 lies flat.

[0062] Specifically, the power source assembly 8 includes an integrally formed bracket having a cylindrical mounting cavity penetrating the bracket in the up-down direction, and the rotating shaft of the vacuum fan 83 is longitudinally arranged and installed in the mounting cavity. A plurality of battery pack accommodating cavities are arranged around the bracket, and the surrounding center of the battery pack accommodating cavity is the center of the vacuum fan 83. Preferably, the battery pack here is a cylindrical structure. Specifically, a circuit driving board 81 is installed at the upper end of the bracket, and the circuit driving board 81 is a driving circuit board of the battery pack. The circuit board is perpendicular to the axial direction of the vacuum assembly, which is equivalent to being blocked above the mounting cavity.

[0063] In at least one embodiment, the power source assembly 8 and the control assembly 9 are at least partially overlapped; or the power source assembly 8 is arranged below the control assembly 9. This makes the power source assembly 8 and the control assembly 9 at least partially arranged up and down; compared with arranging the power source assembly 8 and the control assembly 9 in the front-to-back direction, this arrangement reduces the space occupied by the power source assembly 8 and the control assembly 9 in the height direction when the fuselage 3 lies flat, which facilitates the flattening design of the fuselage 3, thereby enabling the fuselage 3 to be flush with the floor brush 4.

[0064] In at least one embodiment, the body 3 includes a rear shell 32 and a front shell 31 buckled on the rear shell 32, and the depth of the front shell 31 gradually decreases from top to bottom. Fig.12 The front shell 31 includes a front wall and side walls. The side walls inclined outward around the front shell 31 can keep the front shell 31 in a streamlined structure, which is convenient for reducing the thickness of the fuselage 3 around the front shell 31, which is conducive to the fuselage 3 entering a lower space. In addition, when the depth of the front shell 31 gradually decreases from top to bottom, it is convenient for the front shell 31 to gradually guide the airflow flowing from the front end when the fuselage 3 is lying flat, thereby reducing the wind resistance coefficient of the front shell 31 when the fuselage 3 is moving.

[0065] In at least one embodiment, the upper portion of the rear shell 32 is recessed outward to form a first installation cavity 322, the power source assembly 8 and the control assembly 9 are installed in the first installation cavity 322, the lower portion of the rear shell 32 is recessed inward to form a second installation cavity 321, the sewage bucket 7 is installed in the second installation cavity 321, and the sewage bucket 7 is smoothly connected to the outer surface of the rear shell 32 and is arranged flush. This arrangement can lower the center of gravity of the fuselage 3 when it lies flat, so that the center of gravity of the fuselage 3 is closer to the ground to be cleaned. This low center of gravity design helps to reduce air resistance, thereby improving the operating performance and efficiency of the surface cleaning device. When the surface cleaning device cleans a low space, there is less airflow under the fuselage 3, which reduces resistance and improves the balance of the fuselage 3. When lying flat, the power source assembly 8 and other important components are arranged at the lowest point of the body 3, especially close to the rear shell 32 of the body 3, and the rear shell 32 is closer to the surface to be cleaned. The sewage bucket 7 and the rear shell 32 are closer to the surface to be cleaned, which can optimize the weight distribution and lower the center of gravity. In particular, it can make it easier for the floor brush 4 to turn, so that the customer can more easily control the surface cleaning device to clean the surface to be cleaned comprehensively, not just to go in a straight line, avoiding the inconvenience of turning. For details, see Figure 4 and Figure 5 The front wall 324 is formed by the front concave of the fuselage 3, and the rear wall 323 is formed by the rear concave of the fuselage 3. The front wall and the rear wall are connected by a connecting plate.

[0066] In this embodiment, when the fuselage 3 is in a flat state, the central axis of the power source assembly 8 is not higher than the central axis of the fuselage 3. In addition, the control assembly 9 does not protrude from the first installation cavity 322, and the printed circuit board of the control assembly 9 is not higher than the central axis of the fuselage 3. Preferably, the central axis of the power source assembly 8 coincides with the central axis of the fuselage 3. That is, the front end of the power source assembly 8 fits with the front shell 31, and the rear end fits with the rear shell 32, so the entire power source assembly 8 spans the front and back of the fuselage 3, so that the central axis of the power source assembly 8 coincides with the central axis of the fuselage 3, so that the center of gravity of the fuselage 3 is lowered in the flat state, so that the fuselage 3 can run more stably in the flat cleaning state.

[0067] It can be understood that the central axis of the power source assembly 8 can also be set lower than the central axis of the fuselage 3; the central axis of the printed circuit board of the control assembly 9 can also be set to coincide with the axis line of the fuselage 3; at the same time, the central axis of the power source assembly 8, the central axis of the printed circuit board and the central axis of the sewage bucket 7 can also be set to coincide, and the central axes of the three are all lower than the central axis of the fuselage 3. In the lying state, the height of the fuselage 3 can also be set to be flush with the highest point on the upper surface of the floor brush 4, that is, the height difference between the two is zero. Alternatively, in the lying state, the height of the fuselage 3 can also be set to be within 0.6 cm higher than the highest point on the upper surface of the floor brush 4; such technical solutions that do not deviate from the concept of the present application are all within the protection scope of the present invention, and will not be given examples one by one here.

[0068] When the control component 9 is not higher than the first installation cavity 322 and the printed circuit board is not higher than the central axis of the fuselage 3, it is convenient to further reduce the installation height of the control component 9 in the fuselage 3 when it is lying flat, lower the center of gravity of the fuselage 3 when it is lying flat, and improve the convenience of operating the fuselage 3.

[0069] In at least one embodiment, the fuselage 3 is in a lying state, the overall external shape formed by the sewage bucket 7 and the rear shell 32 is a boat shape, and the upper part of the rear shell 32 is provided with auxiliary running wheels. This arrangement makes it easy to form a plurality of inclined guide surfaces at the rear shell 32, and the inclined guide surfaces at the front shell 31 can reduce the wind resistance borne by the rear shell 32 when it moves forward and backward and turns, thereby improving the flexibility of the surface cleaning device when it moves. When the fuselage 3 is in a lying state, the auxiliary running wheels can be supported between the fuselage 3 and the ground to be cleaned. First, the auxiliary running wheels can be used to support the fuselage 3, reduce the user's operating load, and improve the smoothness of the fuselage 3 when it is pushed and pulled forward and backward and turned. Secondly, the auxiliary running wheels can avoid friction between the lower part of the fuselage 3 and the ground to be cleaned, thereby avoiding friction damage to the outer surface of the fuselage 3.

[0070] In at least one embodiment, the water supply system includes a water tank 5 and a water supply pipeline, the floor brush 4 includes a lower shell, the lower shell is provided with a receiving chamber, the cleaning assembly 6 is arranged at the front end of the outer side of the receiving chamber, the water tank 5 is arranged in the receiving chamber, and the upper port of the receiving chamber is arranged to gradually increase from front to back. In the case where the above-mentioned clean water tank 5 is arranged on the floor brush 4, the center of gravity of the clean water tank 5 is lowered, which is conducive to lowering the center of gravity of the entire surface cleaning device. The characteristic of the lowered center of gravity of the above-mentioned body 3 when lying flat can further increase the flexibility of the surface cleaning device.

[0071] In addition, the water tank 5 is arranged behind the accommodating cavity of the floor brush 4, and the upper port of the accommodating cavity is arranged to gradually increase from front to back. This arrangement makes it easy to make the upper surface shape of the water tank 5 match the characteristic that the upper surface height of the floor brush 4 increases from front to back.

[0072] In at least one embodiment, a roller brush cover is provided above the cleaning assembly 6, and a downward guide surface is provided at the front end of the roller brush cover. This arrangement utilizes the downward guide surface provided at the roller brush cover to achieve wind-breaking when the floor brush 4 moves, thereby reducing the air assist when the body 3 moves forward and backward, thereby improving the flexibility of the surface cleaning device when in motion.

[0073] In this embodiment, it also includes a handle 1, a handle rod 2 and a fixed sleeve. The upper part of the rear shell 32 is also provided with a through hole. The handle rod 2 passes through the through hole and is fixedly inserted into the fixed sleeve in the first installation cavity 322 to fix the handle 1 to the upper part of the rear shell 32. The handle rod 2 and the handle are arranged close to the rear surface of the rear shell 32, and there is an isolation gap between the fixed sleeve and the control component 9.

[0074] Specifically, the fixed sleeve is fixed in the first installation cavity 322 by a bolt connector. The fixed sleeve and the control assembly 9 are arranged front and back with an isolation gap between them. The isolation gap can avoid electrical interference between the fixed sleeve and the control assembly 9.

[0075] In this embodiment, the projection of the handle bar 2 along its own axis falls into the first installation cavity 322. Compared with the method in the prior art in which the handle bar 2 and the fixed sleeve are convex to the rear side of the fuselage 3, the handle bar 2 and the fixed sleeve in this solution will not affect the thickness of the fuselage 3, which is convenient for thinning the front and rear thickness of the fuselage 3. Preferably, the axial direction of the handle bar 2 and the fixed sleeve is parallel to the central axis of the fuselage 3 and the power source assembly 8. When the fuselage 3 is in a lying state, the height of the fixed sleeve is lower than the plane where the central axis of the power source assembly 8 and the sewage bucket 7 are located, and thus this method makes the center of gravity of the fixed sleeve lower than the center of gravity of the power source assembly 8 and other components, which is convenient for further reducing the center of gravity height of the entire fuselage 3 in the lying state.

[0076] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments of the foregoing text, but it is easy for those skilled in the art to understand that the protection scope of the present application is not limited to the above preferred embodiments. Without departing from the technical principles of the present application, those skilled in the art may split and combine the technical solutions in the above preferred embodiments, and may also make equivalent changes or replacements to the relevant technical features, and any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present application will fall within the protection scope of the present application.

Claims

1. A surface cleaning device capable of lying flat for cleaning, comprising a water supply system, a sewage suction system, a body and a floor brush hinged thereto, the sewage suction system comprising a vacuum fan, a sewage bucket with a sewage inlet pipe and a sewage suction channel, the floor brush is provided with a sewage suction port, a water supply port and a cleaning component, and the body is provided with the vacuum fan; characterized in that: The body is flat and rotates relative to the floor brush to a flat state, so that the upper surface of the body and the upper surface of the floor brush are flush with each other, and the height difference between the two is within 0.8 cm.

2. The surface cleaning device capable of lying flat for cleaning according to claim 1, characterized in that: The height of the rear portion of the floor brush is higher than the height of the front portion of the floor brush.

3. The surface cleaning device capable of lying flat for cleaning according to claim 2, characterized in that: The height of the floor brush gradually increases from the front to the rear, and the upper surface of the body is flush with the highest point of the rear of the floor brush; or, the highest point of the rear of the floor brush is higher than the upper surface of the body by less than 0.6 cm; or, the upper surface of the body is higher than the highest point of the rear of the floor brush by 0.1 cm to 0.8 cm.

4. The surface cleaning device capable of lying flat for cleaning according to any one of claims 1 to 3, characterized in that: A battery pack, a control component, and a vacuum blower are arranged in the fuselage. The battery pack is arranged on the left and right sides of the vacuum blower to form a power source component, so that the power source component is flat and the thickness in the front-to-back direction is smaller than the width in the left-to-right direction.

5. The surface cleaning device capable of lying flat for cleaning according to claim 4, characterized in that: The fuselage includes a rear shell and a front shell snapped onto the rear shell, the upper portion of the rear shell is recessed outward to form a first installation cavity, the power source component and the control component are installed in the first installation cavity, the lower portion of the rear shell is provided with an inward recess to form a second installation cavity, the sewage bucket is installed in the second installation cavity, and the sewage bucket is smoothly connected and flush with the outer surface of the rear shell.

6. The surface cleaning device capable of lying flat for cleaning according to claim 4, characterized in that: When the fuselage is in a flat state, the central axis of the power source assembly is not higher than the central axis of the fuselage.

7. The surface cleaning device capable of lying flat for cleaning according to claim 4, characterized in that: The control component does not protrude from the first installation cavity, and the printed circuit board of the control component is not higher than the central axis of the fuselage.

8. The surface cleaning device capable of lying flat for cleaning according to claim 1, characterized in that: The fuselage is in a flat lying state, the sewage bucket and the rear shell form an overall external shape of a boat, and the upper part of the rear shell is provided with auxiliary running wheels.

9. The surface cleaning device capable of lying flat for cleaning according to any one of claims 1 to 3, characterized in that: The water supply system includes a water tank and a water supply pipeline. The floor brush includes a lower shell with a accommodating cavity provided on the lower shell. The cleaning component is arranged at the front end of the outer side of the accommodating cavity. The water tank is arranged in the accommodating cavity. The upper port of the accommodating cavity gradually increases from front to back.

10. The surface cleaning device capable of lying flat for cleaning according to claim 9, characterized in that: A roller brush cover is arranged above the cleaning component, and a downward guiding surface is arranged at the front end of the roller brush cover.

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