Cleaning head of surface cleaner and surface cleaner

Abstract

The utility model provides a cleaning head of a surface cleaner. The cleaning head comprises a shell assembly, a stirrer, an autonomous driving wheel and a driven wheel. The shell assembly defines a containing cavity, an avoiding part is defined behind the shell assembly, and at least one part of the avoiding part is located on the bottom face of the shell assembly. The stirrer is arranged in the containing cavity of the shell assembly and can be driven to rotate. The autonomous driving wheel is at least partially arranged in the avoiding part, and the autonomous driving wheel can be driven to rotate relative to the shell assembly; the driven wheel is arranged at the bottom of the shell assembly and can rotate relative to the shell assembly. When the cleaning head of the surface cleaner is located on the surface to be cleaned, the autonomous driving wheel and the driven wheel can make contact with the surface to be cleaned. The outer diameter of the autonomous driving wheel is larger than that of the driven wheel. The utility model further provides a surface cleaner.

Description

Technical Field

[0001] The present invention relates to a cleaning head of a surface cleaner and the surface cleaner. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] Wet surface cleaners are cleaning equipment suitable for cleaning various hard surfaces in home or office environments.

[0004] Typically, a wet surface cleaner includes a liquid delivery system for wetting the dirt on the surface to be cleaned and mixing the dirt and cleaning liquid through the agitation of an agitator. The mixture of dirt and cleaning liquid is collected into a recovery tank through a vacuum suction port of the wet surface cleaner close to the surface to be cleaned, and the recovery tank is now in fluid communication with a vacuum source.

[0005] Traditional wet surface cleaners can only be driven back and forth by the user's hand. The agitator of the wet surface cleaner needs a certain friction with the surface to be cleaned to remove the dirt adhered to the surface to be cleaned, and the load of the wet surface cleaner is usually heavy, which makes the user easily tired. Utility Model Content

[0006] In order to solve one of the above technical problems, the present disclosure provides a cleaning head of a surface cleaner and a surface cleaner.

[0007] According to one aspect of the present disclosure, there is provided a cleaning head for a surface cleaner, comprising:

[0008] A housing component, wherein the housing component defines a receiving chamber, and a relief portion is defined at the rear of the housing component, and at least a portion of the relief portion is located on the bottom surface of the housing component;

[0009] an agitator, the agitator being disposed in the receiving chamber of the housing assembly and being capable of being driven to rotate;

[0010] an autonomous drive wheel, the autonomous drive wheel being at least partially disposed within the avoidance portion and being drivable to rotate relative to the housing assembly;

[0011] A driven wheel, the driven wheel is arranged at the bottom of the housing assembly and can rotate relative to the housing assembly;

[0012] Wherein, when the cleaning head of the surface cleaner is located on the surface to be cleaned, both the autonomous driving wheel and the driven wheel can contact the surface to be cleaned; and the outer diameter of the autonomous driving wheel is larger than the outer diameter of the driven wheel.

[0013] The cleaning head of a surface cleaner according to at least one embodiment of the present disclosure, wherein a clearance space is defined at the bottom of the housing assembly, and the driven wheel is at least partially disposed in the clearance space and is rotatable relative to the housing assembly.

[0014] The cleaning head of a surface cleaner according to at least one embodiment of the present disclosure, wherein a mounting boss is defined at the bottom of the housing assembly, a clearance space is defined on the mounting boss, and the driven wheel is at least partially disposed in the clearance space and is rotatable relative to the housing assembly.

[0015] The cleaning head of a surface cleaner according to at least one embodiment of the present disclosure, wherein the avoidance portion is disposed at a central position behind the housing assembly.

[0016] The cleaning head of a surface cleaner according to at least one embodiment of the present disclosure, wherein the driven wheel is located behind the housing assembly.

[0017] The cleaning head of a surface cleaner according to at least one embodiment of the present disclosure, wherein the driven wheel includes a left driven wheel and a right driven wheel, and the avoidance portion is located between the left driven wheel and the right driven wheel.

[0018] The cleaning head of a surface cleaner according to at least one embodiment of the present disclosure, wherein the distance from the avoidance portion to the left driven wheel is substantially equal to the distance to the right driven wheel.

[0019] The cleaning head of a surface cleaner according to at least one embodiment of the present disclosure, when the cleaning head is located on the surface to be cleaned, at least a part of the self-driving wheel is within the projection range of the housing assembly on the surface to be cleaned.

[0020] The cleaning head of a surface cleaner according to at least one embodiment of the present disclosure, when the cleaning head is located on the surface to be cleaned, at least a part of the driven wheel is within the projection range of the housing assembly on the surface to be cleaned.

[0021] The cleaning head of a surface cleaner according to at least one embodiment of the present disclosure further includes two charging interfaces, and the two charging interfaces are disposed at the bottom of the housing assembly adjacent to the avoidance portion.

[0022] The cleaning head of a surface cleaner according to at least one embodiment of the present disclosure further includes two charging interfaces, and the two charging interfaces are respectively located on both sides of the avoidance portion on the bottom surface of the housing assembly.

[0023] According to another aspect of the present disclosure, there is provided a surface cleaner, comprising:

[0024] A main body portion

[0025] A handle portion, the handle portion is detachably connected to the main body portion, and the handle portion includes a user interaction button;

[0026] a recovery tank fluidly connected to a suction source;

[0027] a supply tank for storing a cleaning liquid;

[0028] an electric pump in fluid connection with the supply tank;

[0029] A cleaning head, wherein the cleaning head is connected to the main body through a connecting portion, and the main body as a whole can pivot relative to the cleaning head around at least one axis; wherein the cleaning liquid in the supply tank can be provided to the cleaning head or the surface to be cleaned near the cleaning head through an electric pump; and the dirt and cleaning liquid after the cleaning head cleans the surface to be cleaned are collected in a recovery tank;

[0030] Wherein, the cleaning head is the cleaning head of the above-mentioned surface cleaner.

[0031] According to the surface cleaner of at least one embodiment of the present disclosure, when the handle portion is applied with external force, the main body portion can rotate between an angle range of a parallel posture parallel to the surface to be cleaned to an angle range of a self-supporting posture, wherein the angle of the parallel posture is 0°~5°.

[0032] In the surface cleaner according to at least one embodiment of the present disclosure, the main body includes a main body shell, and a position on the main body shell near the connecting portion includes an avoidance area to prevent the main body shell from interfering with the autonomous drive wheel during the pivoting of the main body as a whole relative to the cleaning head around at least one axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0034] Figure 1 is a schematic structural diagram of a surface cleaner according to one embodiment of the present disclosure.

[0035] Figure 2 is a schematic structural diagram of a surface cleaner according to an embodiment of the present disclosure from another angle.

[0036] Figure 3 is a schematic structural diagram of a surface cleaner according to another embodiment of the present disclosure.

[0037] Figure 4Schematic structural diagram of the charging interface of a surface cleaner according to an embodiment of the present disclosure.

[0038] Specifically, the reference signs in the figure are as follows:

[0039] 100 Handle part

[0040] 200 Main body part

[0041] 210 Main body housing

[0042] 220 Avoidance area

[0043] 300 Supply tank

[0044] 400 Recovery tank

[0045] 500 Connection part

[0046] 600 Cleaning head

[0047] 610 Housing assembly

[0048] 611 Mounting boss

[0049] 620 Stirrer

[0050] 630 Self-driving wheel

[0051] 640 Left driven wheel

[0052] 650 Right driven wheel

[0053] 660 Charging interface. Detailed implementation manners

[0054] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific implementation manners described herein are only used to explain the relevant content and do not limit the present disclosure. Additionally, it should be noted that for the convenience of description, only parts related to the present disclosure are shown in the drawings.

[0055] It should be noted that, without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. The technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings and embodiments.

[0056] Unless otherwise specified, the exemplary embodiments / Examples shown will be understood to provide exemplary features of various details of some ways that can implement the technical concept of the present disclosure in practice. Therefore, unless otherwise specified, without departing from the technical concept of the present disclosure, the features of various embodiments / Examples can be additionally combined, separated, interchanged, and / or rearranged.

[0057] In the drawings, the use of cross-hatching and / or shading is generally employed to clarify the boundaries between adjacent components. Thus, unless otherwise stated, the presence or absence of cross-hatching or shading does not convey or imply any preference or requirement for the specific material, material properties, dimensions, proportions, commonality between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. Additionally, in the drawings, for clarity and / or descriptive purposes, the dimensions and relative dimensions of components may be exaggerated. When exemplary embodiments can be implemented differently, the specific process sequences may be performed in an order different from that described. For example, two consecutively described processes may be performed substantially simultaneously or in an order opposite to that described. Furthermore, the same reference numerals denote the same components.

[0058] When a component is referred to as being "on" or "above" another component, "connected to" or "coupled to" another component, the component can be directly on the other component, directly connected to or directly coupled to the other component, or there may be intervening components. However, when a component is referred to as being "directly on" another component, "directly connected to" or "directly coupled to" another component, there are no intervening components. For this reason, the term "connected" can refer to a physical connection, an electrical connection, etc., and can have or not have intervening components.

[0059] For descriptive purposes, the present disclosure may use spatial relative terms such as "beneath", "below", "under", "underneath", "above", "on", "over", "upper", and "side (e.g., as in "sidewall")" to describe the relationship of one component to another (other) component as shown in the drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacturing. For example, if the device in the drawings is flipped, a component described as being "beneath" or "under" another component or feature will then be positioned "above" the other component or feature. Thus, the exemplary term "beneath" can encompass both the "above" and "below" orientations. Additionally, the device may be otherwise positioned (e.g., rotated 90 degrees or at other orientations), and accordingly, the spatial relative descriptors used herein are to be interpreted.

[0060] The terms used herein are for the purpose of describing particular embodiments and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are also intended to include the plural forms. In addition, when the terms "comprising" and / or "including" and their variants are used in this specification, it is stated that there are the stated features, integers, steps, operations, components, assemblies, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integers, steps, operations, components, assemblies, and / or groups thereof. It should also be noted that, as used herein, the terms "substantially", "about", and other similar terms are used as approximate terms and not as terms of degree, so they are used to explain the inherent deviations of measured values, calculated values, and / or provided values that would be recognized by a person of ordinary skill in the art.

[0061] Figure 1 is a schematic structural view of a surface cleaner according to an embodiment of the present disclosure. Figure 2 is a schematic structural view of another angle of the surface cleaner according to an embodiment of the present disclosure. Figure 3 is a schematic structural view of a surface cleaner according to another embodiment of the present disclosure.

[0062] As Figures 1 to 3 shown, the surface cleaner of the present disclosure is configured to be capable of performing wet cleaning on a surface to be cleaned, wherein the surface to be cleaned may be a floor surface, preferably a household floor surface. At the same time, after the surface cleaner performs wet cleaning on the floor surface, the liquid (sewage) after cleaning the surface to be cleaned can be recovered into the surface cleaner.

[0063] Specifically, the surface cleaner may include components such as a handle portion 100, a main body portion 200, a supply tank 300, a recovery tank 400, a connection portion 500, and a cleaning head 600.

[0064] The handle portion 100 is used to operate the surface cleaner. More specifically, on the one hand, an operator can control the attitude of the surface cleaner by operating the handle portion 100.

[0065] For example, when the main body portion 200 of the surface cleaner can rotate between an angle of a parallel attitude parallel to the surface to be cleaned and an angle of a self-supporting attitude, wherein the angle of the parallel attitude is 0° to 5°.

[0066] User interaction buttons may be provided on the handle portion 100, and the user interaction buttons may be physical buttons, so as to control the surface cleaner through these physical buttons, such as controlling the start and stop of the surface cleaner and controlling the liquid supply speed and suction power of the surface cleaner, etc., so as to make the user experience of the surface cleaner better.

[0067] The handle portion 100 can be disposed at the upper end of the main body portion 200, and the handle portion 100 can be detachably connected to the main body portion 200, so that the surface cleaner can be operated by operating the handle portion 100. In the present disclosure, the main body portion 200 is formed as the main force-bearing structure of the surface cleaner, and the recovery tank 400 of the surface cleaner can be directly or indirectly fixed to the main body portion 200.

[0068] As Figures 1 to 3 shown, the main body portion 200 is formed with an accommodation space, and the recovery tank 400 is detachably disposed in the main body portion 200 and located in the accommodation space. When the liquid stored in the recovery tank 400 is relatively large, the user can remove the recovery tank 400, pour out the internal sewage and clean up the solid waste. At this time, a part of the outer surface of the recovery tank 400 forms a part of the outer surface of the surface cleaner.

[0069] In order to recover the liquid after cleaning the surface to be cleaned, the recovery tank 400 can be connected to the cleaning head 600 through a recovery pipeline. Correspondingly, the mixture of sewage and gas (dirty) can be recovered to the recovery tank 400 through this recovery pipeline.

[0070] In the present disclosure, the surface cleaner further includes an electric suction source (not shown in the figure). The electric suction source can include a vacuum motor, so that a vacuum (negative pressure) can be generated through this electric suction source. At the same time, the electric suction source can be connected to the recovery tank 400, so as to provide this negative pressure to the recovery tank 400, thereby realizing the forced flow of gas and sewage in the recovery pipeline. In the present disclosure, the gas discharged from the electric suction source can flow to the outside of the surface cleaner through the gaps on a part of the outer surface of the surface cleaner.

[0071] In a preferred embodiment, the recovery tank 400 can be located at the rear of the main body portion 200.

[0072] The main body portion 200 is connected to the cleaning head 600 through a connecting portion 500, so that the main body portion 200 is pivotally connected to the cleaning head 600. In the present disclosure, the main body portion 200 has at least two rotational degrees of freedom relative to the cleaning head 600, so that the user can operate the surface cleaner more conveniently.

[0073] When the surface cleaner of the present disclosure is in use, the cleaning head 600 is configured to be able to move on the surface to be cleaned, so as to perform wet cleaning on the surface to be cleaned through the cleaning head 600.

[0074] As Figures 1 to 3 shown, the cleaning head 600 of the present disclosure can include components such as a housing assembly 610, a stirrer 620, a self-driving wheel 630, a left driven wheel 640, and a right driven wheel 650.

[0075] The housing assembly 610 is configured to be connected to the main body portion 200 through the connecting portion 500, and the housing assembly 610 is capable of moving on the surface to be cleaned. The surface of the housing assembly 610 close to the surface to be cleaned is formed as the bottom surface of the housing assembly 610. When the surface cleaner is cleaning the surface to be cleaned, the user can operate the surface cleaner so that the surface cleaner can move in the front-back direction, where the forward direction is the direction in which the cleaning head 600 is away from the user, and correspondingly, the backward direction is the direction in which the cleaning head 600 is close to the user. At the same time, the left and right directions can be defined by the forward and backward directions.

[0076] The housing assembly 610 is capable of defining a receiving chamber for the cleaning head, and the receiving chamber is located in the front half of the cleaning head 600 for receiving the agitator 620 therein. Correspondingly, the agitator 620 is also located in the front half of the cleaning head 600.

[0077] A suction nozzle is formed on the housing assembly 610. In the present disclosure, the suction nozzle is disposed adjacent to the agitator 620 and is located behind the agitator 620. In the present disclosure, the suction nozzle is connected to the recovery pipeline and is formed as the starting point of the recovery path. That is to say, the suction nozzle of the present disclosure can communicate with the recovery tank 400 of the surface cleaner.

[0078] The agitator 620 is configured to agitate the surface to be cleaned; that is to say, when the surface cleaner is performing a cleaning operation or a self-cleaning operation, the agitator 620 can be driven by a motor to rotate. Thus, the agitator 620 can make frictional contact with the surface to be cleaned, that is, the agitator 620 can cooperate with the cleaning liquid to scrub the surface to be cleaned to achieve the cleaning of the surface to be cleaned. During the process of the agitator 620 making frictional contact with the surface to be cleaned, the cleaning liquid can be supplied to the agitator 620 or the surface to be cleaned near the agitator 620, thereby achieving the wet cleaning of the surface to be cleaned.

[0079] In addition, a relief portion is defined at the rear of the housing assembly 610, and at least a part of the relief portion is located on the bottom surface of the housing assembly 610; in a specific embodiment, the relief portion of the housing assembly 610 can be formed as a groove of the housing assembly 610; and at least a part of the opening of the groove faces the rear of the housing assembly 610, and at least a part of the opening of the groove faces the bottom of the housing assembly 610.

[0080] The self - driving wheel 630 is at least partially disposed within the avoidance portion, and the self - driving wheel 630 can be driven to rotate relative to the housing assembly 610; that is to say, the self - driving wheel 630 of the present disclosure may include a driving wheel shaft and a driving wheel body fixedly connected. The two ends of the driving wheel shaft are respectively rotatably supported on the left and right side walls of the avoidance portion, and at least a part of the driving wheel shaft extends into the interior of the housing assembly 610. At this time, a driving motor may be disposed inside the housing assembly 610, and the driving motor can drive the driving wheel shaft to rotate, so that the self - driving wheel 630 rotates.

[0081] In a preferred embodiment, the left driven wheel 640 and the right driven wheel 650 may be referred to as driven wheels. Or rather, the driven wheels of the present disclosure may include the left driven wheel 640 and the right driven wheel 650.

[0082] In the present disclosure, the left driven wheel 640 and the right driven wheel 650 are respectively disposed on the left and right sides of the avoidance portion of the housing assembly 610, and both the left driven wheel 640 and the right driven wheel 650 can rotate relative to the housing assembly 610. That is to say, the self - driving wheel 630 of the present disclosure is located between the left driven wheel 640 and the right driven wheel 650.

[0083] Specifically, the left driven wheel 640 and the right driven wheel 650 of the present disclosure have the same structure and the same dimensions. Taking one of the driven wheels 640 as an example, the structure of the left driven wheel 640 and the right driven wheel 650 will be described.

[0084] In the present disclosure, the driven wheel 640 may include a driven wheel body and a driven wheel shaft; the driven wheel body is rotatably disposed on the driven wheel shaft, and the two ends of the driven wheel shaft can be fixed to the housing assembly 610, whereby the driven wheel body of the present disclosure can rotate relative to the housing assembly.

[0085] Thus, when the cleaning head 600 of the surface cleaner of the present disclosure is located on the surface to be cleaned, the self - driving wheel 630, the left driven wheel 640, and the right driven wheel 650 can all contact the surface to be cleaned. Correspondingly, the cleaning head 600 of the surface cleaner of the present disclosure can be supported by the self - driving wheel 630, the left driven wheel 640, and the right driven wheel 650.

[0086] In a preferred embodiment, the avoidance portion is disposed at the center of the rear of the housing assembly 610; correspondingly, the self - driving wheel 630 is also located at the center of the rear of the housing assembly 610.

[0087] Meanwhile, the left driven wheel 640 and / or the right driven wheel 650 are located behind the housing assembly 610. That is to say, the self-driven wheel 630, the left driven wheel 640, and the right driven wheel 650 of the present disclosure can support the cleaning head 600 of the surface cleaner from the rear. Accordingly, the agitator 620 can support the cleaning head 600 of the surface cleaner from the front. Thus, the agitator 620 can be in pressure contact with the surface to be cleaned, so that the agitator 620 can clean the surface to be cleaned more efficiently.

[0088] In the present disclosure, the outer diameter dimension of the self-driven wheel 630 is larger than that of the driven wheel. Thus, the self-driven wheel 630 of the present disclosure can bear a greater downward pressure than the driven wheel. In addition, the width of the self-driven wheel 630 is also larger than that of the driven wheel, so that the self-driven wheel 630 can provide a greater driving force without slipping.

[0089] In one embodiment, as Figure 2 shown, a mounting boss 611 is defined at the bottom of the housing assembly 610 of the present disclosure. An avoidance space is defined on the mounting boss 611. The driven wheel is at least partially disposed in the avoidance space and can rotate relative to the housing assembly 610.

[0090] In another embodiment, as Figure 3 shown, an avoidance portion is formed on the housing assembly 610, and a driven wheel is disposed in the avoidance portion; that is to say, the left driven wheel 640 and / or the right driven wheel 650 of the present disclosure are respectively disposed in an avoidance portion. At this time, three avoidance portions are defined at the rear end of the housing assembly 610. The avoidance portion in the middle has a larger size for mounting the self-driven wheel, and the avoidance portions on both sides have smaller sizes for mounting the left driven wheel 640 and / or the right driven wheel 650.

[0091] In the present disclosure, the distance from the avoidance portion to the left driven wheel 640 is substantially equal to the distance to the right driven wheel 650. That is to say, there is a first distance between the self-driven wheel 630 and the left driven wheel 640, and there is a second distance between the self-driven wheel 630 and the right driven wheel 640. The first distance is substantially the same as the second distance.

[0092] In the vertical direction, when the cleaning head 600 is located on the surface to be cleaned, at least a part of the self-driven wheel 630 is within the projection range of the housing assembly 610 on the surface to be cleaned. Moreover, as Figure 3 shown, when the cleaning head 600 is located on the surface to be cleaned, at least a part of the left driven wheel 640 and / or the right driven wheel 650 is outside the projection range of the housing assembly 610 on the surface to be cleaned.

[0093] Similarly, as Figure 2As shown, when the cleaning head 600 is located on the surface to be cleaned, at least a part of the driven wheel is within the projection range of the housing assembly 610 on the surface to be cleaned. Thus, the self-driven wheel 630, the left drive wheel 640, and the right drive wheel 650 of the present disclosure can more stably support the cleaning head of the surface cleaner.

[0094] In a preferred embodiment, as Figure 4 shown, the cleaning head 600 of the surface cleaner further includes two charging interfaces 660, and the two charging interfaces 660 are arranged near the avoidance portion at the bottom of the housing assembly 610. More preferably, the two charging interfaces 660 are respectively located on both sides of the avoidance portion on the bottom surface of the housing assembly 610. Thus, the base station can charge the rechargeable battery of the surface cleaner through these two charging interfaces 660.

[0095] In the present disclosure, the main body portion 200 includes a main body housing, and a position on the main body housing near the connection portion includes an avoidance area 220 to avoid interference between the main body housing 210 and the self-driven wheel 630 during the pivoting of the main body portion as a whole relative to the cleaning head 600 about at least one axis; in other words, when the surface cleaner of the present disclosure is in a lying flat state, the main body housing 210 will not collide with the cleaning head 600 either.

[0096] The supply tank 300 of the present disclosure is formed in the shape of a box to store the cleaning liquid in the supply tank 300. In one embodiment, the cleaning liquid can be purified water. Of course, those skilled in the art should know that a mixture of purified water and a cleaning agent, etc. can also be stored in the supply tank 300.

[0097] In one embodiment, a receiving space is formed on the main body portion 200, and the supply tank 300 can be disposed in the receiving space such that a part of the outer surface of the supply tank 300 forms a part of the outer surface of the surface cleaner.

[0098] In another embodiment, as Figures 1 to 3 shown, the supply tank 300 of the present disclosure can be disposed on the housing assembly 610; in other words, the supply tank 300 of the present disclosure can be formed as a part of the cleaning head 600. Moreover, the supply tank 300 can be detached from the housing assembly 610 and the cleaning liquid can be filled manually by the user.

[0099] In the present disclosure, to achieve wet cleaning of the surface to be cleaned, the supply tank 300 can be connected to an electric pump (not shown in the figure), so that the cleaning liquid in the supply tank 300 can be pressurized by the electric pump and then provided to the stirrer 620. Thus, wet cleaning of the surface to be cleaned can be achieved through the cleaning liquid. In a preferred embodiment, the electric pump is disposed inside the housing assembly 610, and correspondingly, the electric pump also forms a part of the cleaning head 600.

[0100] The driving prevention of the self-driving wheel of the present disclosure will be described below.

[0101] In the present disclosure, the driving modes of the self-driving wheel 630 may include driving in the clockwise and counterclockwise directions. The left and right driven wheels can be respectively installed on both sides of the cleaning head, and the left and right driven wheels rotate independently. When the surface cleaner moves straight forward, the left and right driven wheels rotate clockwise at the same speed under the friction force of the surface to be cleaned; when the surface cleaner moves straight backward, the left and right driven wheels rotate counterclockwise at the same speed under the friction force of the surface to be cleaned; when the surface cleaner turns left or right forward, the left and right driven wheels rotate independently clockwise at different speeds under the friction force of the surface to be cleaned.

[0102] The driving device for driving the self-driving wheel 630 to rotate can be a motor, and the motor can actively drive the self-driving wheel 630 by applying current. When current is applied to the motor, the self-driving wheel 630 will rotate.

[0103] In one example, the cleaning head of the surface cleaner includes an encoder for detecting the rotational speed and direction of the motor. The encoder can also sense the rotational speed of the self-driving wheel 630 and calculate the moving speed and direction of the surface cleaner based on the rotational speed of the motor or the directly measured rotational speed of the self-driving wheel 630.

[0104] More specifically, the encoder can calculate the moving direction and speed, such as the states of the surface cleaner when moving forward and backward. Moving forward and backward on the surface to be cleaned are the most main action states during the working process of the surface cleaner.

[0105] The encoder is configured to control the self-driving wheel 630 and measure the rotation amount and direction of the self-driving wheel 630 to evaluate the movement or intention of the user. This evaluation is based on the rotational speed and acceleration sensed by the encoder, enabling accurate identification of whether the speed and acceleration change due to user manipulation or ground load changes.

[0106] The encoder can be installed on the motor, and the axis of the motor is inserted into the encoder, so that the encoder can detect the rotational speed of the motor and send the current number of revolutions per minute of the motor to the controller. The encoder can also send information about the rotation direction of the motor.

[0107] After receiving the rotational speed information detected by the encoder, the controller can calculate the moving speed of the surface cleaner on the surface to be cleaned based on this information. The acceleration of the surface cleaner can be calculated by multiplying the rotational speed by the outer diameter of the self-driving wheel 630.

[0108] The controller can also control the motor based on the rotational speed information detected by the encoder, and further control the movement of the surface cleaner. The controller adjusts the rotational speed of the motor through feedback, so that the rotational speed of the motor can be adjusted according to actual needs, rather than remaining constant. For example, in some cases, the rotational speed of the motor will increase, while in other cases it may decrease.

[0109] The rotational speed of the motor can also vary according to the current applied to the motor. The higher the current, the higher the rotational speed of the motor usually is.

[0110] In one example, through the feedback of the autonomous drive wheels 630, the moving direction and speed of the surface cleaner can be precisely adjusted according to the user's position or intention.

[0111] When the speed of the surface cleaner reaches or exceeds the preset value, the controller applies current to the drive motor and its connected autonomous drive wheels 630. On the contrary, when the surface cleaner is stationary or its moving speed is lower than the preset value, the controller no longer applies current.

[0112] For a handheld wet surface cleaner, the user can push or pull the surface cleaner through the handle, and the preset speed value can be set as the minimum speed for performing the cleaning operation. The user can also hold the handle and tilt the main body of the surface cleaner to a preset angle (for example, in a parallel posture parallel to the surface to be cleaned). At this time, the autonomous drive wheels 630 may rotate, but are not driven by electricity, which means that the user is ready to lay the surface cleaner flat and does not immediately need the assistance of the autonomous drive wheels 630 to move the surface cleaner for cleaning.

[0113] The preset speed value of the surface cleaner can be adjusted according to the floor load or usage. Carpets have a higher resistance value than hard floors. Therefore, the greater the floor load, the smaller the preset value, and vice versa.

[0114] When the user slightly pushes the surface cleaner, the surface cleaner can move on a hardwood floor. Even when the force applied by the user when tilting the handheld wet surface cleaner is very small, the surface cleaner can still move forward.

[0115] Therefore, when the encoder detects that the speed of the surface cleaner is lower than the preset value, it is preferably not to drive the autonomous drive wheels 630, otherwise the surface cleaner may move in an unexpected direction, causing inconvenience to the user.

[0116] For example, if the surface cleaner immediately energizes the motor of the autonomous drive wheels 630 when the user applies an external force through the handle to tilt the surface cleaner, causing the cleaning head to move forward immediately, the user may lose control of the handle, resulting in the surface cleaner falling off the hand and onto the floor.

[0117] Therefore, current will only be applied to the motor when the speed of the surface cleaner reaches a preset value. Preferably, after the speed reaches the preset value, current is continuously applied to the motor.

[0118] After the speed of the surface cleaner is higher than the preset value, the current applied to the motor will increase with the increase in speed.

[0119] When the user speeds up the surface cleaner, it indicates that the user hopes to move the surface cleaner faster. Therefore, the increase in the current of the motor can reduce the force required by the user to apply to the surface cleaner.

[0120] The higher the speed, the greater the current applied to the motor. Through the feedback control of the motor by the encoder, the applied current increases proportionally with the motor speed. The time point for applying current can be the time point when the moving speed of the surface cleaner reaches the preset value.

[0121] When the surface cleaner works on the surface to be cleaned, it usually moves back and forth repeatedly, with the speed increasing first and then decreasing, and then pausing for a moment before moving in the reverse direction.

[0122] In a typical application of the surface cleaner, the time point for applying current can be judged according to the moving speed of the surface cleaner.

[0123] According to an embodiment of the present disclosure, the user can easily control the surface cleaner to move forward and backward. Especially for a heavier surface cleaner, the present disclosure can significantly reduce the difficulty of user operation.

[0124] In one example, the surface cleaner moves according to the user operation and detects whether it is the first drive during the first movement, so as to determine whether the surface cleaner has completely stopped.

[0125] By detecting the changes in rotational speed and acceleration, it is possible to distinguish between a temporary stop and a complete stop. For example, when both the rotational speed and acceleration reach zero within 1 second, it can be determined that the surface cleaner has completely stopped; if only the rotational speed is zero and the acceleration is not zero, it is a temporary stop.

[0126] Once the first movement is detected, the encoder senses the rotational speed of the motor and converts it into the speed of the surface cleaner, and the controller calculates the speed of the surface cleaner based on this.

[0127] Then, the controller determines whether the speed reaches the preset value and applies current to drive the motor. The applied current is proportional to the moving speed of the surface cleaner and increases with the increase in speed. This process is continuously repeated until the surface cleaner stops moving.

[0128] When both the speed and acceleration are zero, the application of current stops. The time for applying current is only based on the speed change, while the time for stopping the application of current takes into account both the speed and acceleration.

[0129] By considering the acceleration and speed of the surface cleaner, the magnitude of the current applied to the motor can be determined, thereby optimizing the user experience.

[0130] In the description of this specification, the description with reference to terms such as "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments / ways or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments / ways or examples described in this specification and the features of different embodiments / ways or examples.

[0131] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0132] Those skilled in the art should understand that the above embodiments are only for clearly explaining the present disclosure and not for limiting the scope of the present disclosure. For those skilled in the art, other changes or modifications can be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. The cleaning head of a surface cleaner, characterized in that, Comprising: A housing assembly that defines a receiving chamber, and a clearance portion is defined at the rear of the housing assembly, and at least a part of the clearance portion is located on the bottom surface of the housing assembly; A stirrer disposed in the receiving chamber of the housing assembly and capable of being driven to rotate; An autonomous drive wheel at least partially disposed in the clearance portion and capable of being driven to rotate relative to the housing assembly; A driven wheel disposed at the bottom of the housing assembly and capable of rotating relative to the housing assembly; Wherein, when the cleaning head of the surface cleaner is located on the surface to be cleaned, both the autonomous drive wheel and the driven wheel can contact the surface to be cleaned; the outer diameter dimension of the autonomous drive wheel is larger than the outer diameter dimension of the driven wheel.

2. The cleaning head of the surface cleaner according to claim 1, characterized in that, A clearance space is defined at the bottom of the housing assembly, and the driven wheel is at least partially disposed in the clearance space and can rotate relative to the housing assembly.

3. The cleaning head of the surface cleaner according to claim 2, characterized in that, An installation boss is defined at the bottom of the housing assembly, a clearance space is defined on the installation boss, and the driven wheel is at least partially disposed in the clearance space and can rotate relative to the housing assembly.

4. The cleaning head of the surface cleaner according to claim 1, characterized in that, The clearance portion is disposed at a central position at the rear of the housing assembly.

5. The cleaning head of the surface cleaner according to claim 1, wherein, The driven wheel is located at the rear of the housing assembly.

6. The cleaning head of the surface cleaner according to claim 1, characterized in that, The driven wheel includes a left driven wheel and a right driven wheel, and the clearance portion is located between the left driven wheel and the right driven wheel.

7. The cleaning head of the surface cleaner according to claim 6, characterized in that, The distance from the clearance portion to the left driven wheel is approximately equal to the distance to the right driven wheel.

8. The cleaning head of the surface cleaner according to claim 1, characterized in that, When the cleaning head is located on the surface to be cleaned, at least a part of the autonomous drive wheel is within the projection range of the housing assembly on the surface to be cleaned.

9. The cleaning head of the surface cleaner according to claim 1, characterized in that, When the cleaning head is located on the surface to be cleaned, at least a part of the driven wheel is within the projection range of the housing assembly on the surface to be cleaned.

10. The cleaning head of the surface cleaner according to claim 1, wherein It further includes two charging interfaces disposed at the bottom of the housing assembly adjacent to the clearance portion.

11. The cleaning head of the surface cleaner according to claim 1, characterized in that, It further includes two charging interfaces respectively located on both sides of the clearance portion on the bottom surface of the housing assembly.

12. A surface cleaner, characterized in that, Comprising: A main body portion, A handle portion detachably connected to the main body portion, and the handle portion includes user interaction buttons; A recovery tank fluidly connected to a suction source; A supply tank for storing cleaning liquid; An electric pump fluidly connected to the supply tank; A cleaning head connected to the main body portion through a connecting portion and enabling the main body portion to pivot relative to the cleaning head as a whole about at least one axis; wherein, the cleaning liquid in the supply tank can be provided to the cleaning head or the surface to be cleaned near the cleaning head through the electric pump; the dirt and cleaning liquid after the cleaning head cleans the surface to be cleaned are collected into the recovery tank; Wherein, the cleaning head is the cleaning head of the surface cleaner according to any one of claims 1 - 11.

13. The surface cleaner according to claim 12, characterized in that, When an external force is applied to the handle portion, the main body portion can rotate between an angle in a parallel posture parallel to the surface to be cleaned and an angle in a self - supporting posture, wherein the angle of the parallel posture is 0° - 5°.

14. The surface cleaner according to claim 13, wherein, The main body portion includes a main body housing, and a position on the main body housing close to the connecting portion includes an avoidance area to avoid interference between the main body housing and the self-driving wheels during the pivoting of the main body portion as a whole relative to the cleaning head about at least one axis.

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