A surface cleaning device

Abstract

The present invention discloses a surface cleaning device, which includes a main body and a motor assembly. A suction pipeline is defined within the main body. The motor assembly is disposed in a motor assembly installation cavity defined by the main body and is used to generate a suction air flow flowing along the suction pipeline. An electronic component installation cavity communicating with the motor assembly installation cavity is further defined within the main body. An air inlet is provided on the main body. The cooling air flow generated by the motor assembly enters the electronic component installation cavity from the air inlet and then flows through the motor assembly installation cavity to sequentially cool the electronic components and the motor assembly. By using the cooling air flow of the motor to cool the circuit board at the same time, the cost of the device can be effectively saved, and the volume of the entire device can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning equipment, and particularly to a surface cleaning device. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for floor cleaning. To meet the needs of different people, various surface cleaning devices such as vacuum cleaners, floor washers, and steam mops have emerged on the market. As the functions of surface cleaning devices become more and more, the components on the circuit board are also more and more. In order to ensure that the volume of the surface cleaning device does not change much, each component needs to occupy a relatively small volume. Therefore, more components are integrated onto the circuit board, and the heat generated during their operation is not easily dissipated, which easily causes the circuit board to overheat. Summary of the Invention

[0003] In view of the deficiencies in the above technology, the present invention provides a surface cleaning device that can effectively cool the circuit board to ensure the normal use of the surface cleaning device.

[0004] In a first aspect, the present invention provides a surface cleaning device,

[0005] a main body, which defines a suction duct therein;

[0006] a motor assembly, disposed in a motor assembly installation cavity defined by the main body, for generating a suction air flow flowing along the suction duct;

[0007] wherein, an electronic component installation cavity communicating with the motor assembly installation cavity is further defined in the main body, an air inlet is formed on the main body, and the cooling air flow generated by the motor assembly enters the electronic component installation cavity from the air inlet and then flows through the motor assembly installation cavity to cool the electronic components and the motor assembly in sequence.

[0008] Optionally, it further includes a sewage tank fluidly connected to the suction duct, the sewage tank is installed in a sewage tank installation cavity defined by the main body, and the main body further has an exhaust hole communicating with the sewage tank installation cavity, and the exhaust hole is used to guide the cooling air flow to the sewage tank installation cavity.

[0009] Optionally, the suction air flow and the cooling air flow converge upstream of the impeller of the motor assembly to form a mixed air flow, and the mixed air flow flows through the impeller and then is discharged into the sewage tank installation cavity through an air outlet channel.

[0010] Optionally, it further includes a clean water tank for supplying cleaning liquid, the clean water tank is installed in a clean water tank installation cavity defined by the main body, and the main body further has an exhaust hole communicating with the clean water tank installation cavity, and the exhaust hole is used to guide the cooling air flow to the clean water tank installation cavity.

[0011] Optionally, the suction air flow and the cooling air flow converge upstream of the impeller of the motor assembly to form a mixed air flow, and the mixed air flow is discharged into the clean water tank installation cavity through the air outlet channel after flowing through the impeller.

[0012] Optionally, a water leakage hole is formed in the bottom wall of the sewage tank installation cavity for guiding at least part of the liquid in the mixed air flow to the surface to be cleaned and / or the cleaning head of the surface cleaning device.

[0013] Optionally, the main body includes a front frame and a rear frame. The front frame defines a sewage tank installation cavity and an electronic component installation cavity, the rear frame defines a clean water tank installation cavity, and the front frame and the rear frame jointly define the motor assembly installation cavity.

[0014] Optionally, at least part of the electronic component installation cavity is located in front of the clean water tank installation cavity in the advancing direction of the surface cleaning device, and the motor assembly installation cavity is located above the clean water tank installation cavity and below the sewage tank installation cavity in the vertical direction.

[0015] Optionally, the motor assembly includes a motor housing and a dry-wet motor disposed in the motor housing. The motor housing includes an upper housing and a lower housing, and the lower housing defines an air inlet channel and an air outlet channel.

[0016] Optionally, along the air flow direction, the cross-sectional area of at least part of the air inlet channel gradually decreases. The air outlet channel is a strip-shaped channel, and both the air inlet channel and the air outlet channel communicate with the sewage tank installation cavity defined by the main body.

[0017] The surface cleaning device provided by the present invention includes a main body and a motor assembly. A suction pipeline is defined in the main body. The motor assembly is disposed in the motor assembly installation cavity defined by the main body and is used to generate a suction air flow flowing along the suction pipeline. An electronic component installation cavity communicating with the motor assembly installation cavity is further defined in the main body. An air inlet is formed on the main body. The cooling air flow generated by the motor assembly enters the electronic component installation cavity from the air inlet and then flows through the motor assembly installation cavity to cool the electronic components and the motor assembly in sequence. By using the cooling air flow of the motor to cool the circuit board at the same time, the cost of the device can be effectively saved, and the volume of the whole device can be reduced.

[0018] In a second aspect, the present invention provides a surface cleaning device with a pivoting structure, including:

[0019] A cleaning head that can move on the surface to be cleaned to clean the surface to be cleaned;

[0020] A main body pivotally connected to the cleaning head through a pivoting structure;

[0021] Wherein, the pivot structure includes an upper connecting member and a lower connecting member. The upper connecting member is connected to the main body, and the lower connecting member is pivotally connected to the cleaning head about a first axis so that the main body pivots relative to the cleaning head along the traveling direction. The upper connecting member and the lower connecting member can rotate relative to each other about a second axis so that the main body deflects relative to the cleaning head. The first axis and the second axis are substantially perpendicular.

[0022] Optionally, the angle between the second axis and the axis in the length direction of the main body is any value between 30° and 50°.

[0023] Optionally, the lower connecting member includes an upright section and a horizontal section connected to the upright section. One end of the horizontal section away from the upright section is pivotally connected to the cleaning head through a rotating shaft, and the upright section is rotatably connected to the upper connecting member.

[0024] Optionally, a first limiting structure is provided at the rotating shaft, and the first limiting structure is configured to limit the forward and backward rotation of the main body relative to the cleaning head when the main body is upright relative to the cleaning head.

[0025] Optionally, the lower connecting member is further provided with a second limiting structure, which has a locking position and an unlocking position. In the unlocking position, the upper connecting member and the lower connecting member can rotate relative to each other. In the locking position, the upper connecting member and the lower connecting member cannot rotate relative to each other.

[0026] Optionally, the second limiting structure includes an elastic member and a slider.

[0027] Optionally, a chute is provided on the outer surface of the upright section, and the upper connecting member slides along the chute to rotate relative to the lower connecting member.

[0028] Optionally, through holes are formed in the peripheral wall of the upper connecting member, and a positioning piece is provided between the upper connecting member and the lower connecting member. Part of the positioning piece enters the chute through the through holes, and the remaining part of the positioning piece is clamped at the through holes to limit the movement of the upper connecting member and the lower connecting member in the direction of the second axis.

[0029] Optionally, a switch structure is provided at the rotating shaft, and the switch structure is used to cooperate with a micro switch provided on the cleaning head.

[0030] Optionally, the cleaning head is provided with at least one universal wheel in contact with the surface to be cleaned.

[0031] In a third aspect, the present invention provides a motor assembly, including

[0032] A motor housing, which includes a peripheral wall, a top wall, and a bottom wall, and an installation space is defined among the peripheral wall, the top wall, and the bottom wall;

[0033] A wet and dry motor installed in the installation space, which is used to generate a cooling air flow and a suction air flow;

[0034] Wherein, a cooling air inlet is formed on the peripheral wall and / or the top wall, the bottom wall is configured with an air outlet channel and an air inlet channel, and the cooling air flow enters the motor interior from the cooling air inlet to cool the wet and dry motor and then is discharged from the motor housing through the air outlet channel.

[0035] Optionally, the motor housing is provided with an installation bracket, and the installation bracket is used to install a conductive contact.

[0036] Optionally, the suction air flow and the cooling air flow converge to form a mixed air flow upstream of the impeller of the wet and dry motor.

[0037] Optionally, sealing members are arranged at the ends of both the air inlet channel and the air outlet channel.

[0038] Optionally, the cross-section of at least part of the air inlet channel gradually decreases along the flowing direction of the suction air flow.

[0039] Optionally, the air outlet channel is arranged between the air inlet channel and the peripheral wall, and the cross-section of the air outlet channel is strip-shaped.

[0040] In a fourth aspect, the present invention further provides a surface cleaning device. The dirt recovery system of the surface cleaning device includes a suction pipeline, a sewage tank fluidly connected to the suction pipeline, and the motor assembly in any of the above embodiments that is used to generate a suction air flow flowing along the suction pipeline.

[0041] Optionally, a main body, which defines a sewage tank installation cavity for placing the sewage tank, the air outlet channel is communicated with the sewage tank installation cavity, and the air flow discharged from the air outlet channel is discharged to the outside through the gap between the sewage tank and the main body.

[0042] Optionally, the motor housing is further provided with a detection device, and the detection device is used to detect whether a filter Hepa is installed.

[0043] Optionally, the air inlet channel and the air outlet channel are located above the sewage tank installation cavity.

[0044] In a fifth aspect, the present invention provides a cleaning head, which is used to move on a surface to be cleaned to clean the surface to be cleaned, and includes

[0045] A suction nozzle, adjacent to or in contact with the surface to be cleaned;

[0046] A suction pipe is arranged on the cleaning head. The suction pipe is in fluid communication with the nozzle to recover the dirt on the surface to be cleaned through the nozzle.

[0047] Wherein, a storage space is defined in the suction pipe, and the storage space is configured to store at least part of the dirt remaining in the suction pipe.

[0048] Optionally, along the air flow direction, the suction pipe includes a horizontally arranged section and an inclined section arranged in sequence. Along the vertical direction, the inclined section has a bottom end and a top end, and the storage space is arranged at the bottom end of the inclined section.

[0049] Optionally, the storage space is arranged at the intersection of the horizontal section and the inclined section.

[0050] Optionally, a through hole communicating with the storage space is provided on the bottom wall of the cleaning head, and a sealing cover is provided at the through hole to seal the storage space from the outside.

[0051] Optionally, along the air flow direction, the bottom wall of the horizontal section gradually slopes downward.

[0052] Optionally, the storage space is defined by the lower housing of the cleaning head.

[0053] Optionally, the storage space is formed by a part of the horizontal section being recessed downward.

[0054] In a sixth aspect, the present invention further provides a cleaning head for moving on a surface to be cleaned to clean the surface to be cleaned, including

[0055] A nozzle adjacent to or in contact with the surface to be cleaned;

[0056] A suction pipe is arranged on the cleaning head. The suction pipe is in fluid communication with the nozzle to recover the dirt on the surface to be cleaned through the nozzle.

[0057] Wherein, a through hole communicating with the suction pipe is provided on the bottom wall of the cleaning head, and a sealing cover is provided at the through hole.

[0058] Optionally, along the air flow direction, the suction pipe includes a horizontally arranged section and an inclined section arranged in sequence. Along the vertical direction, the inclined section has a bottom end and a top end, and the through hole is arranged in the area corresponding to the bottom end of the inclined section.

[0059] In a seventh aspect, the present invention provides a surface cleaning device, including

[0060] A cleaning head for moving on a surface to be cleaned to clean the surface to be cleaned;

[0061] A main body having opposite ends, one end pivotally connected to the cleaning head and the other end connected to a handle;

[0062] Wherein, the main body includes a front frame and a rear frame, the front frame defines a sewage tank installation cavity and an electronic component installation cavity, the rear frame defines a clean water tank installation cavity, and after the front frame and the rear frame are combined together, they jointly define a motor assembly installation cavity. In the advancing direction of the cleaning head, the opening of the sewage tank installation cavity faces forward and the opening of the clean water tank installation cavity faces backward.

[0063] Optionally, the rear frame further defines a battery pack installation slot, and the battery pack installation slot is located below the clean water tank installation cavity.

[0064] Optionally, at least part of the electronic component installation cavity is located in front of the clean water tank installation cavity along the advancing direction of the cleaning head.

[0065] Optionally, the battery pack is detachably installed in the battery pack installation slot.

[0066] Optionally, the front frame is provided with at least one air inlet, and the at least one air inlet is communicated with the electronic component installation cavity.

[0067] Optionally, the electronic component installation cavity is communicated with the motor assembly installation cavity, and the cooling air flow enters the electronic component installation cavity from the at least one air inlet and then enters the motor assembly installation cavity to cool the electronic components and the motor assembly in sequence.

[0068] Optionally, an installation structure is provided at the battery pack installation slot, and the installation structure is used for installing the wiring terminals for docking the battery pack.

[0069] Optionally, in the vertical direction, the motor assembly installation cavity is located below the clean water tank installation cavity and above the sewage tank installation cavity.

[0070] Optionally, the main body further includes a decorative member, and a communication hole is provided on the decorative member, and the communication hole is in fluid communication with the air inlet.

[0071] Optionally, the front frame is provided with an exhaust hole, and the exhaust hole is used for guiding the cooling air flow to the sewage tank installation cavity. Description of the Drawings

[0072] Figure 1 It is a schematic structural diagram of a cleaning system in an embodiment of the present invention;

[0073] Figure 2 It is a schematic sectional view of a cleaning system in an embodiment;

[0074] Figure 3 Schematic structural diagram of the handle in an embodiment;

[0075] Figure 4 is Figure 3 Schematic cross-sectional view of the handle shown;

[0076] Figure 5 is Figure 3 Exploded structural view of the handle shown;

[0077] Figure 6 Schematic structural diagram of the water purification tank in an embodiment;

[0078] Figure 7 is Figure 6 Cross-sectional view of the water purification tank shown;

[0079] Figure 8 is Figure 6 Exploded structural view of the water purification tank shown;

[0080] Figure 9 Schematic structural diagram of the sewage tank in an embodiment;

[0081] Figure 10 is Figure 9 Cross-sectional view of the sewage tank shown;

[0082] Figure 11 is Figure 9 Exploded structural view of the sewage tank shown;

[0083] Figure 12 is Figure 9 Schematic structural diagram of the separated upper cover and lower cover of the sewage tank shown;

[0084] Figure 13 is Figure 9 Schematic structural diagram of the cover of the sewage tank shown;

[0085] Figure 14 is Figure 9 Schematic structural diagram of the cover of the sewage tank shown (from another angle);

[0086] Figure 15 Exploded structural diagram of the main frame in an embodiment;

[0087] Figure 16 Schematic cross-sectional view of the main frame in an embodiment;

[0088] Figure 17 Schematic structural diagram of the front frame at one angle in an embodiment;

[0089] Figure 18 Schematic structural diagram of the front frame at another angle in an embodiment;

[0090] Figure 19 Schematic diagram of the rear frame from another angle in an embodiment;

[0091] Figure 20 Schematic diagram of the rear frame from another angle in an embodiment.

[0092] Figure 21 Schematic diagram of the motor assembly from one angle in an embodiment.

[0093] Figure 22 Schematic diagram of the motor assembly from another angle in an embodiment;

[0094] Figure 23 Cross-sectional view of the motor assembly in an embodiment;

[0095] Figure 24 Exploded view of the motor assembly in an embodiment;

[0096] Figure 25 Schematic diagram of the pivot structure installed on the pivot bracket in an embodiment;

[0097] Figure 26 Schematic diagram of the pivot structure in an embodiment;

[0098] Figure 27 Exploded view of the pivot structure in an embodiment;

[0099] Figure 28 Schematic diagram of the upper and lower connectors of the pivot structure separated in an embodiment;

[0100] Figure 29 Cross-sectional view of the pivot structure in an embodiment (the second limiting structure is in the locked position);

[0101] Figure 30 Cross-sectional view of the pivot structure in an embodiment (the second limiting structure is in the unlocked position);

[0102] Figure 31 Schematic diagram of the pivot structure in an embodiment.

[0103] Figure 32 Schematic diagram of the cleaning head in an embodiment;

[0104] Figure 33 Schematic diagram of the cleaning head after removing the upper housing in an embodiment;

[0105] Figure 34 Schematic diagram of the upper housing of the cleaning head in an embodiment;

[0106] Figure 35 Schematic diagram of the cleaning head after removing the upper housing and the roller brush cover in an embodiment;

[0107] Figure 36 It is a schematic structural diagram of another angle of the cleaning head in an embodiment;

[0108] Figure 37 It is a schematic cross-sectional diagram of the cleaning head in an embodiment;

[0109] Figure 38 It is a schematic structural diagram of the dispenser in the cleaning head being exposed in an embodiment;

[0110] Figure 39 It is a schematic cross-sectional diagram of the cleaning head at one angle in an embodiment;

[0111] Figure 40 For Figure 39 an enlarged structural diagram of the area A shown;

[0112] Figure 41 It is a schematic cross-sectional diagram of the cleaning head at another angle in an embodiment.

[0113] Figure 42 It is a schematic structural diagram of the driving component in an embodiment;

[0114] Figure 43 For Figure 42 a schematic cross-sectional diagram of the driving component shown. Specific embodiments

[0115] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0116] It should be noted that if there are directional indications involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0117] In addition, if descriptions such as "first" and "second" are involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0118] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood through specific circumstances.

[0119] Reference Figure 1 and Figure 2 , Figure 1 is a schematic structural diagram of a cleaning system in an embodiment of the present invention. Figure 2 is a schematic cross-sectional view of a cleaning system in an embodiment. Figure 2 The arrow direction in [[ ]] is the forward direction of the surface cleaning device. The cleaning system includes a surface cleaning device 100 and a base 200. The surface cleaning device 100 further includes a dirt recovery system and a cleaning liquid supply system. The cleaning liquid supply system includes a clean water tank 4, a pipeline, and a nozzle. The liquid in the clean water tank 4 passes through the pipeline and is sprayed onto the roller brush or the surface to be cleaned through the nozzle to clean the surface. Then, the dirt recovery system recovers the dirt after cleaning. The dirt recovery system includes a suction nozzle provided at the cleaning head, a sewage tank 5 for recovering dirt, a motor assembly 6 for generating a suction airflow, and a suction pipeline that fluidly connects the suction nozzle, the sewage tank, and the motor assembly. The suction airflow generated by the motor assembly 6 causes the dirt at the suction nozzle to flow into the sewage tank 5 through the suction pipeline. After the dirt undergoes gas-liquid separation in the sewage tank 5, the gas is discharged outside the device by the motor. The base 200 can dock with the surface cleaning device 100. After the surface cleaning device 100 is docked with the base 200, battery charging and / or starting a self-cleaning program can be realized.

[0120] Continue to refer to Figure 1 and Figure 2, the surface cleaning device 100 includes a handle 1, a main body 2, and a cleaning head 3. The handle 1 and the cleaning head 3 are respectively disposed at two ends of the main body 2 along its axial direction. The handle 1 includes a grip portion 11 and an elongated rod 12. The elongated rod 12 can be a telescopic rod, or can be a non-telescopic straight rod. The elongated rod can also pivot or bend relative to the main body.

[0121] Handle

[0122] Reference Figures 3 - 5 , Figure 3 is a schematic structural view of the handle in an embodiment. Figure 4 is Figure 3 a schematic cross-sectional view of the handle shown. Figure 5 is Figure 3 a schematic exploded view of the structure of the handle shown. The grip portion 11 is composed of two annular inner shells 113 and an annular outer shell. The inner shell is molded into a complete ring, and an installation structure extends outward from the outer periphery of the inner shell. The installation structure is connected to the elongated rod 12 by snap and / or bolts. The outer shell includes an upper shell 111 and a lower shell 112. The upper shell 111 and the lower shell 112 are respectively disposed on the upper and lower sides of the inner shell to surround the inner shell. The outer shell and the inner shell form a complete grip portion. The upper shell defines an installation space, and a circuit board is installed in the installation space. The upper shell is configured with through holes penetrating the shell, and the control buttons are connected to the circuit board through the through holes for controlling the program operation of the surface cleaning device and / or the base. The circuit board is installed in the installation space through an installation bracket. The circuit board is connected to the installation bracket 114 by snap and / or bolts. A silica gel pad is disposed between the two ends of the installation bracket and the inner wall surface of the upper shell 111. The silica gel pad can prevent water on the one hand and effectively improve the hand feeling on the other hand. The two ends of the installation bracket are connected to the upper shell by clamping and / or screws. The upper shell 111 and the lower shell 112 are connected by snap and / or bolts. A wire passing channel is defined between the outer shell and the inner shell, and the wire harness extends to the elongated rod through the wire passing channel.

[0123] Continuing to refer Figure 5 , the lower shell 112 is Y-shaped. The upper half of the Y-shaped lower shell is connected to the upper shell 111, and the lower half defines a channel through which the elongated rod 12 can pass and be connected to the inner shell. A positioning structure can be provided between the upper shell and the lower shell, and between the outer shell and the inner shell to facilitate positioning during assembly.

[0124] Continuing to refer Figures 3 - 5, the elongated rod 12 has opposite ends, one end is connected to the handle part, and the other end is connected to the main body by a buckle and / or a bolt. A wire harness connector 121 is provided at one end of the elongated rod connected to the main body. A channel is defined in the elongated rod, and the wire harness passes through the channel and is electrically connected to the wire harness connector. The wire harness connector is electrically connected to the wire harness connector located inside the main body for transmitting signals. The wire harness connector 121 is mounted on the elongated rod 12 through a mounting member 122. A sealing ring is provided on the outer periphery of the mounting member to prevent water from entering the main body. The mounting member is mounted on the elongated rod through at least one snap 123, and the snap 123 can also cooperate with the mounting hole on the main body to limit the axial movement of the elongated rod relative to the main body.

[0125] Water purification tank

[0126] Reference Figures 6 - 8 , Figure 6 is a schematic structural view of the water purification tank in an embodiment. Figure 7 is Figure 6 a sectional view of the shown water purification tank. Figure 8 is Figure 6 an exploded structural view of the shown water purification tank. The water purification tank 4 includes a container 41 and a top cover 42. The container 41 includes a bottom wall 411, a top wall 412, and side walls 413 extending between the top wall 412 and the bottom wall 411. The top wall and the side walls extending downward from the periphery of the top wall are integrally molded. The bottom wall is welded to the side walls by a high-frequency induction welding process to define a liquid storage space. A water injection port 43 is provided on the top wall 412. A plunger valve 44 is provided on the bottom wall. When the water purification tank 4 is installed on the main body, the valve is opened. The plunger valve is of a conventional structure and will not be elaborated here. A limiting structure 414 is also provided on the bottom wall to prevent the water purification tank from sliding out of the main body after being installed on the main body. Grooves are provided on the side walls for the convenience of the user to pick up and place. The top cover 42 is disposed above the container. A pivotable lid 421 is provided on the top cover. The lid 421 can open and close the water injection port. An installation space is defined between the lid 421 and the top wall 412. Part of the lock 45 is located in the installation space. The lock includes a button 451 and a spring 4552. One end of the spring 452 abuts against the top wall, and the other end abuts against the button 451. The button includes an integrally formed and spaced-apart clamping portion 453 and a triggering portion 454. When the triggering portion 454 is pressed, the clamping portion 453 will move together with the triggering portion. The upper ends of the clamping portion and the triggering portion both extend out of the top cover 42. The upper end of the clamping portion 453 is clamped into the corresponding groove on the main body, and the upper end of the triggering portion 454 is exposed to the outside for the convenience of the user to touch. The top cover 42 is generally in a prismatic shape. The top cover includes a front wall 422, a rear wall 423, and side walls 424 extending between the two walls. One end of the front wall 422 and the rear wall 423 are connected, and the other end is separated to define an installation space. The rear wall is recessed downward to form a space for installing the lid. A through hole is provided on the rear wall to enable the clamping portion to extend out from the inside of the top cover. Another through hole is provided at the intersection of the front wall and the rear wall to facilitate the triggering portion to extend out from the inside of the top cover.

[0127] Sewage tank

[0128] Referring to FIGS. 9-14, Figure 9 is a schematic structural view of the sewage tank in an embodiment. Figure 10 is Figure 9 a sectional view of the shown sewage tank. Figure 11 is Figure 9 an exploded structural view of the shown sewage tank. Figure 12 is Figure 9 a schematic structural view of the upper cover and the lower cover of the shown sewage tank after separation. Figure 13 is Figure 9 a schematic structural view of the lid of the shown sewage tank. Figure 14 is Figure 9 a schematic structural view of the lid of the shown sewage tank (from another angle). The sewage tank 5 includes a body 51 and a lid 52. The body 51 is integrally molded. The body 51 includes a bottom wall 511 and side walls 512 extending upward from the four sides of the bottom wall 511. An opening surrounded by the side walls is provided on the upper surface of the body. An air inlet pipe 513 is provided at the bottom wall 512. The air inlet pipe 513 extends upward from a part of the bottom wall. The height of the air inlet pipe does not exceed the side wall and accounts for about two-thirds of the total height of the side wall.

[0129] An air-liquid separator (not shown in the figure) is provided at the air inlet pipe. The air-liquid separator is sleeved on the top end of the air inlet pipe (the air outlet of the air inlet pipe is located at the top end of the air inlet pipe). A filter net (not shown in the figure) is provided inside the body. The filter net is used to keep the solid impurities in the sewage tank inside the sewage tank when the user pours the sewage. The filter is provided at the middle position of the sewage tank, higher than the warning water level line. Through holes are provided on the body of the air-liquid separator. At least part of the through holes communicate with the air inlet pipe. The function of the through holes is to prevent part of the sewage from entering the body of the air-liquid separator and being unable to be discharged when pouring the sewage.

[0130] Continuing to refer to Figures 12 - 14 , the lid 52 defines an air outlet. The lid is formed by snapping together an upper cover body 521 and a lower cover body 522. The upper cover body 521 is an integrally molded ring structure. The upper cover body includes an inner wall and an outer wall located outside the inner wall. The inner wall and the outer wall are connected at the upper end by a top wall. An accommodation space is defined between the inner wall, the outer wall and the top wall. Among them, the ring-shaped inner wall defines an upper through hole 523 for accommodating the filter. The periphery of the upper through hole is stepped for supporting the filter HEPA. The filter HEPA is a conventional structure and will not be elaborated here. A lock 53 is provided in the accommodation space. The lock includes a button 531 and a spring 532. The button includes a clamping portion 533 and a triggering portion 534. The button 531 is integrally molded. Among them, a part of the clamping portion 533 extends out from the opening in the top wall. An opening is provided on the outer wall. The triggering portion 534 is exposed to the upper cover body through the opening. The user can control the triggering portion through this opening.

[0131] Continue to refer to Figures 12 - 14 , the structure of the lower cover body 522 is adapted to that of the upper cover body 521, and it is also an integrally molded annular structure. A lower through hole 524 is defined at its center. The airflow in the recycling box flows out of the sewage tank after passing through the lower through hole 524 and the upper through hole 523 in sequence. Specifically, the annular peripheral wall defines a concave cavity. A part of the bottom wall of the concave cavity is constructed with a grid-like structure (lower through hole). The grid-like structure is inclined relative to the horizontal plane. At the same time, the grid-like structure is inclined relative to the peripheral wall, and the bottom end of the peripheral wall is lower than the grid-like structure.

[0132] Continue to refer to Figures 12 - 14 , a pair of mounting brackets 525 are provided on the lower cover body 522. A conductive sheet 526 is mounted on each mounting bracket 525. The conductive sheet can be made of metal material or non-metal material. The conductive sheet extends into the accommodation space defined by the body. When the liquid in the accommodation space reaches a certain capacity, the two conductive sheets are conducted to send out a liquid full signal to prompt the user to clean the sewage tank in time. Preferably, the conductive sheet is arranged above the filter net. A sealing ring is provided around the outer periphery of the lower cover body 522, and the sealing ring is in interference fit with the inner wall of the sewage tank to play a sealing role. In addition, a sealing ring 527 is also provided at the joint of the upper cover body 521 and the lower cover body 522 to seal the gap between the upper through hole and the lower through hole to form a complete through hole. The top end of the conductive sheet passes through the through hole in the top wall of the upper cover body and is electrically connected to the electrical contact piece on the main body.

[0133] The lower surface of the lower cover body protrudes outward with a convex structure, and the convex structure is adapted to the through hole on the body of the gas-liquid separator. When the lid can cover the opening of the sewage tank body, the convex structure seals the through hole.

[0134] Main body

[0135] Refer to Figures 15 - 20 , Figure 15 is an exploded view of the main frame in an embodiment. Figure 16 is a schematic cross-sectional view of the main frame in an embodiment. Figure 17 is a schematic structural view of the front frame at one angle in an embodiment. Figure 18 is a schematic structural view of the front frame at another angle in an embodiment. Figure 19 is a schematic structural view of the rear frame at another angle in an embodiment. Figure 20 is a schematic structural view of the rear frame at another angle in an embodiment. The main body 2 includes a main frame and decorative parts (not shown in the figure) provided on the main frame. The main frame defines a plurality of accommodation spaces for accommodating relevant structures such as the clean water tank 4, the sewage tank 5, the motor assembly 6, the circuit board 24, the display screen 25, etc.

[0136] Refer to Figures 15 - 18, the main frame includes a front frame 22 and a rear frame 23. The front frame 22 defines a sewage tank installation cavity 221 and an electronic component installation cavity 222. Among them, the opening of the sewage tank installation cavity 221 faces the front side, and the opening of the electronic component installation cavity 222 faces the rear side. The main body 2 adopts a structure form of docking the front and rear frames. During the production and manufacturing of the equipment, not only is the manufacturing of the mold relatively convenient, but also the installation saves labor costs. The components carried by the structure of a single frame are relatively few, and a strong structure is not required. Therefore, the materials used can be reduced, making the main body further lightweight.

[0137] Reference Figures 19 - 20 , the rear frame 23 defines a clean water tank installation cavity 231. A part of the bottom wall of the installation cavity is recessed downward to form an installation groove 232. A through hole penetrating the bottom wall is provided in the installation groove 232, and a rubber ring 233 is provided at the through hole. The rubber ring 233 is annular and penetrates the through hole. The rubber ring on the side located in the installation groove is used to dock the water outlet valve on the clean water tank, playing a sealing role to prevent the liquid in the clean water tank from entering the installation groove. The rubber ring on the other side of the through hole docks the water outlet plate 234, and the rubber ring also plays a sealing role. A thimble structure penetrating the through hole is provided on the water outlet plate 234. When the clean water tank is installed in the installation groove, the thimble structure pushes the switch of the plunger valve upward, and the water outlet channel is opened. The liquid enters the water outlet plate and is then guided to the surface to be cleaned and / or the roller brush through the conduit. An infrared detection device is installed in the conduit to detect the liquid flow in the conduit. The infrared detection device is detachably fixed to the inner side of the front frame. An outlet hole is also provided in the installation groove, and the outlet hole is connected to the conduit through the water outlet plate, used to guide the liquid in the installation groove to the position where the cleaning head is located.

[0138] The rear frame 23 also defines a battery pack installation groove 235 for installing the battery pack 9. Both the clean water tank 4 and the battery pack 9 face the rear of the equipment, and the clean water tank and the battery pack can be removed from the rear. The battery pack installation groove is provided with an installation structure 236 for installing the wiring terminal. The installation structure 236 is detachably arranged at the battery pack installation groove. A through hole is provided at the battery pack installation groove, and the wire connected to the wiring terminal is connected to mechanisms such as a circuit board and a motor through this through hole.

[0139] Reference Figure 16, other views can also be referred to. After the front frame 22 and the rear frame 23 are docked, they together define a motor assembly installation cavity 223 where the motor assembly can be installed. In the vertical direction, the motor assembly installation cavity 223 is located below the clean water tank installation cavity 231 and above the sewage tank installation cavity 221. Electronic components such as the circuit board 24 and the display screen 25 are arranged in the electronic component installation cavity 222 and in front of the clean water tank installation cavity 231, and the motor assembly 6 is arranged below the clean water tank installation cavity 231 and above the sewage tank installation cavity 221. The electronic component installation cavity 222 is located above the motor assembly 6. An air inlet 224 is provided on the side wall of the electronic component installation cavity 222, and the air inlet 224 is located upstream of the fan cooling air duct of the motor assembly 6. After the outside air flows into the electronic component installation cavity 222 from the air inlet 224, it first cools the electronic components (mainly the circuit board), and then the air flow enters the interior of the motor assembly 6 from the cooling inlet of the fan cooling air duct to cool the motor, and then discharges from the cooling outlet. The cooling outlet is arranged at the air inlet of the main air duct of the motor assembly, and the negative pressure generated by the air inlet realizes the flow of the air flow in the cooling air duct. The decorative part is provided with a communication hole, and the communication hole is in fluid communication with the air inlet 224. The front frame is provided with an exhaust hole 225, and the exhaust hole 225 is used to guide the cooling air flow to the sewage tank installation cavity.

[0140] Motor assembly

[0141] Reference Figures 21 - 24 , Figure 21 is a schematic structural view of a motor assembly at an angle in an embodiment. Figure 22 is a schematic structural view of the motor assembly at another angle in an embodiment. Figure 23 is a cross-sectional view of the motor assembly in an embodiment. Figure 24 is an exploded view of the structure of the motor assembly in an embodiment. The motor assembly 6 includes a motor housing 61 and a wet and dry motor (not shown in the figure) arranged in the motor housing 61. The motor housing includes an upper housing 62 and a lower housing 63. The upper housing 62 is composed of a peripheral wall and a top wall, and the lower housing 63 is composed of a peripheral wall and a bottom wall. An installation space is defined between the peripheral wall, the top wall and the bottom wall. The wet and dry motor is installed in the installation space and is used to generate cooling air flow and suction air flow. A cooling air inlet is provided on the peripheral wall and / or the top wall. In this embodiment, a cooling air inlet 621 and a wire passing hole 622 (see Figure 21 ) for the cooling air flow to enter are provided on the top wall. A shock pad 623 is arranged on the inner side of the top wall, and the shock pad is in contact with the wet and dry motor.

[0142] Reference Figure 22 and 23, an air inlet channel 631 and an air outlet channel 632 are formed in the bottom wall of the lower housing. A rubber gasket 633 is provided at the air inlet of the wet and dry motor. The air inlet is fluidly connected to the air inlet channel 631 through the rubber gasket to achieve sealing. The rubber gasket 633 is disposed between the wet and dry motor and the bottom wall of the lower housing 63, and serves both as a shock absorber and a seal. The rubber gasket 633 is used to separate the air inlet channel 631 and the air outlet channel 632. The air inlet channel 631 formed on the bottom wall is frustum-shaped, and the cross-sectional area of the air inlet channel 631 gradually decreases along the air flow direction. The cross-section of the air outlet channel 632 is strip-shaped. The air outlet channel 632 is disposed between the air inlet channel 631 and the peripheral wall. The opening of the air outlet channel 632 away from the sewage tank installation cavity is closer to the inner wall of the sewage tank installation cavity than the air inlet channel 631. The cooling air flow enters the motor interior from the cooling air inlet 621 to cool the wet and dry motor and then is discharged from the motor housing through the air outlet channel 632. In one embodiment, the suction air flow B and the cooling air flow A converge upstream of the impeller of the wet and dry motor to form a mixed air flow C. That is, the rotation of the impeller generates both the suction air flow and the cooling air flow. In other embodiments, the suction air flow and the cooling air flow may also converge downstream of the impeller or within the impeller to form a mixed air flow. In this way, the cost of the motor can be reduced, and at the same time, the volume of the motor can be decreased. Of course, it can be understood that the generation of the cooling air flow can also be by other devices except the impeller at the air inlet, which will not be elaborated here. A sealing ring 624 is further provided on the outer periphery of the wet and dry motor. The sealing ring 624 is in contact with the top wall and is used to separate the cooling air duct and the air outlet channel 632 of the wet and dry motor.

[0143] Reference Figure 17 and 18 . Figure 18 The direction of the arrow in [reference] is the flow direction of the cooling air flow. The motor assembly 6 is installed in the motor assembly installation cavity 223. The motor assembly installation cavity 223 is located above the sewage tank installation cavity 221. The sewage tank 5 is installed in the sewage tank installation cavity 221 defined by the main body. The main body 2 is further provided with an exhaust hole 225 communicating with the sewage tank installation cavity. The exhaust hole 225 is used to guide the cooling air flow or the mixed air flow to the sewage tank installation cavity 221. When the device is operating normally, the air flow discharged from the air outlet channel is discharged to the outside through the gap between the sewage tank and the main body, which can effectively reduce the noise.

[0144] Continue to refer to Figure 23 , the suction air flow B and the cooling air flow A converge upstream of the impeller of the motor assembly to form a mixed air flow C. The mixed air flow C flows through the impeller and then is discharged to the sewage tank installation cavity 221 through the air outlet channel 632. The bottom wall of the sewage tank installation cavity 221 is provided with a water leakage hole (not shown in the figure) for guiding at least part of the liquid in the mixed air flow to the surface to be cleaned and / or the cleaning head of the surface cleaning device.

[0145] In other embodiments, the main body 2 is also provided with an exhaust hole communicating with the water purification tank installation cavity, and the exhaust hole is used to guide the cooling air flow or the mixed air flow to the water purification tank installation cavity. A water leakage hole may also be provided on the bottom wall of the water purification tank installation cavity. In a further embodiment, the suction air flow and the cooling air flow converge upstream of the impeller of the motor assembly to form a mixed air flow, and the mixed air flow flows through the impeller and then is discharged into the water purification tank installation cavity through the air outlet channel.

[0146] Continuing to refer to Figure 24 , sealing members 634 are provided at the ends of the air inlet channel 631 and the air outlet channel 632. The sealing members 634 are disposed outside the bottom wall of the lower housing 63 and between the bottom walls of the motor housing and the motor assembly installation cavity, and are used to separate the air inlet channel and the air outlet channel. Further, the two sealing members may be integrally formed, that is, two relatively independent holes are formed in a rubber pad.

[0147] Continuing to refer to Figure 22 , a conductive contact 635 is provided on the outer side of the lower housing 63 of the motor housing. The two conductive contacts 635 are telescopically disposed on the mounting bracket 636 of the lower housing. A part of the conductive contact 635 can extend into the sewage tank installation cavity and is electrically connected to the conductive sheet on the sewage tank. The conductive contact is disposed at a position between the air inlet channel and the air outlet channel.

[0148] Continuing to refer to Figure 22 , the lower housing 63 of the motor housing is further provided with a detection device 637. After the filter HEPA is installed in place, the detection device 637 can send a signal, and at this time the machine can be used normally. If the filter HEPA is not installed in place, the machine will send an alarm signal to remind the user to install the HEPA. The detection device can be a reed switch or other device that can send a signal, and a magnet is provided on the filter HEPA. The detection device and the air outlet channel are respectively located on both sides of the air inlet channel.

[0149] Refer to Figure 23 Or 24, a shock absorber 63 is provided between the motor housing 61 and the main body. The shock absorber 63 can be provided on the main body, or can be provided on the motor housing, or the shock absorber 63 is a structure independent of both. In this embodiment, two arc-shaped shock absorber sheets are provided between the motor housing and the front frame, and the shock absorber sheet between the motor housing and the rear frame is adhered to the motor housing. A sealing ring is provided at the joint between the upper housing and the lower housing.

[0150] Pivoting structure

[0151] Refer to Figures 25 - 31 , Figure 25 FIG. is a schematic diagram of the installation of the pivoting structure to the pivoting bracket in an embodiment. Figure 26 FIG. is a schematic diagram of the pivoting structure in an embodiment. Figure 27 FIG. is an exploded view of the pivoting structure in an embodiment.Figure 28 Schematic diagram of the separation of the upper and lower connectors of the central pivot structure in an embodiment. Figure 29 Cross-sectional view of the central pivot structure in an embodiment (the second limiting structure is in the locked position). Figure 30 Cross-sectional view of the central pivot structure in an embodiment (the second limiting structure is in the unlocked position). Figure 31 Schematic diagram of the central pivot structure in an embodiment. The main body 2 and the cleaning head 3 are pivotally connected through a pivot structure 7. The pivot structure 7 includes an upper connector 71 and a lower connector 72. One end of the upper connector 71 is connected to the bottom end of the front frame, and the other end of the upper connector 71 is rotatably connected to one end of the lower connector 72, which can ensure that the main body rotates relative to the cleaning head around the axis of the main body. The other end of the lower connector 72 is pivotally connected to the cleaning head to ensure that the main body rotates forward and backward relative to the cleaning head. Specifically, referring to Figure 26 or Figure 28 , the lower connector 72 is pivotally connected to the cleaning head around the first axis Y so that the main body pivots relative to the cleaning head along the traveling direction, and the upper connector 71 and the lower connector 72 can rotate relative to each other around the second axis X so that the main body deflects relative to the cleaning head. The first axis Y and the second axis X are substantially perpendicular. Referring to Figure 29 , the angle between the second axis X and the axis Z in the length direction of the main body is any value between 30° and 50°. With this pivot structure, when the main body rotates around the second axis X, the handle part will deflect greatly and deviate from the second axis X. At this time, by applying a little force to the handle, the cleaning head can be forced by the main body to change the movement direction. At least one universal wheel is provided below the cleaning head. The cooperation of this pivot structure and the universal wheel can enable the user to more conveniently control the cleaning device and realize the turning of the roller brush. At the same time, a universal wheel is installed below the cleaning head, and under the drive of the handle, the cleaning head can also move horizontally to adapt to different scenarios.

[0152] Continue to refer to Figure 29 , the upper connector 71 is generally in an arc-shaped tubular structure, which is hollow inside. The plastic pipe 73 passes through the hollow structure and forms part of the suction pipeline to fluidly connect the sewage tank and the suction nozzle on the cleaning head. One end of the plastic pipe 73 is provided with a rubber pipe, and part of the rubber pipe extends deep into the installation cavity of the sewage tank. When the sewage tank is installed in the sewage tank installation cavity, the intake pipe of the sewage tank is in sealed contact with the rubber pipe. A dirt detection device 77 is provided at the plastic pipe 73. Specifically, an infrared emission device and an infrared reception device are respectively provided at the radial two ends of the plastic pipe 73. The light emitted by the infrared emission device passes through the plastic pipe and is received by the infrared reception device. When there is more dirt in the suction pipeline, most of the light is blocked and cannot be received. Therefore, the dirt detection device 77 will send a signal, and after the controller receives the signal, it controls the dry-wet motor to increase the speed. When the dirt detection device 77 detects less dirt, it controls the dry-wet motor to decrease the speed.

[0153] Continue to refer to Figure 26 and Figure 27 , the lower connecting member 72 is integrally L-shaped, including an upright section 721 and a horizontal section 722. The upright section 721 is defined with a through hole, and the hose 74 passes through the through hole. Rubber hoses are respectively arranged at both ends of the hose 74 and are hermetically connected to the corresponding pipes. One end of the hose is fluidly connected to the plastic pipe 73, and the other end is fluidly communicated with the suction nozzle of the cleaning head. A rotating shaft 723 is arranged at one end of the horizontal section 722 away from the upright section 721. The lower connecting member 72 can pivot around the pivot bracket 78 on the cleaning head through the rotating shaft 723, so that the main body pivots back and forth relative to the cleaning head. A first limiting structure 724 is arranged on the rotating shaft 723. In this embodiment, the first limiting structure 724 is a first convex structure, and the first convex structure cooperates with a second convex structure arranged on the cleaning head. When the main body is in the upright position, the two convex structures cooperate to limit the front-back rotation of the main body relative to the cleaning head (without the action of external force). Refer to Figure 29 and Figure 30 , a second limiting structure 75 is further arranged on the lower connecting member. The second limiting structure 75 can cooperate with the upper connecting member to limit the relative movement between the upper connecting member and the lower connecting member. The second limiting structure 75 has a locking position and an unlocking position. In the unlocking position, the upper connecting member 71 and the lower connecting member 72 can rotate relative to each other. In the locking position, the upper connecting member 71 and the lower connecting member 72 cannot rotate relative to each other. Specifically, in this embodiment, the second limiting structure 75 is a retractable slider. When the main body tilts relative to the cleaning head, the slider extends outwards and separates from the upper connection. At this time, the upper connecting member 71 and the lower connecting member 72 can rotate relative to each other. When the main body is upright relative to the cleaning head, the slider contracts, and part of the slider extends into the groove defined by the upper connecting member. At this time, since the slider is connected to the lower connecting member, the upper connecting member and the lower connecting member cannot rotate relative to each other.

[0154] Refer to Figure 28 , a chute 727 is arranged on the outer surface of the upright section 721. The relative rotation between the upper connecting member 71 and the lower connecting member 72 is guided through the chute 727. A through hole 711 is opened on the peripheral wall of the upper connecting member 72. The positioning piece 76 can pass through the through hole and extend into the chute to limit the movement of the upper connecting member 71 and the lower connecting member 72 in the axial direction. The positioning piece 76 is stepped. A part of the structure of the positioning piece 76 cooperates with the chute 727 to make the positioning piece 76 relatively stationary with the lower connecting member 72 in the axial direction. Another part of the structure of the positioning piece 76 cooperates with the through hole 711 to make the positioning piece 76 relatively stationary with the upper connecting member 71 in the axial direction. This can ensure that the upper connecting member and the lower connecting member are relatively stationary in the axial direction and can only rotate relative to the axis.

[0155] Refer to Figure 31, a switch structure 726 is provided at the rotating shaft 723 of the lower connecting member 72. The switch structure 726 cooperates with a micro switch provided on the cleaning head to realize the function of power-off in the upright state, that is, when the main body is in the upright state and not placed on the base, the surface cleaning device is in the power-off state, and the battery does not supply power to any components. The through hole defined by the upper connecting member 71 and the lower connecting member 72 not only accommodates the suction pipe, but also allows at least part of the cable to pass through, and a separate wire passing hole is defined therein. The specific structure will not be elaborated.

[0156] Cleaning head

[0157] Reference Figures 32 - 35 , Figure 32 is a schematic structural view of the cleaning head in an embodiment. Figure 33 is a schematic structural view of the cleaning head after removing the upper housing in an embodiment. Figure 34 is a schematic structural view of the upper housing of the cleaning head in an embodiment. Figure 35 is a schematic structural view of the cleaning head after removing the upper housing and the roller brush cover in an embodiment; a pivot bracket 78 for docking the pivot structure 7 is provided on the cleaning head 3 (as Figure 35 shown), and the lower connecting member 72 is pivotally provided on the pivot bracket. The cleaning head 3 further includes an upper housing 31 and a lower housing 32. An installation space is defined between the upper housing 31 and the lower housing 32 for installing various components. Both the upper housing 31 and the lower housing 32 are in an I-shape, and spaces for accommodating roller brushes are respectively defined at both ends along the moving direction for installing a front roller brush 33 and a rear roller brush 34. A roller brush cover 38 is provided above the roller brush, and together with the upper housing 31 and the lower housing 32, a roller brush cavity is defined. A water scraping strip and / or comb teeth are provided on the inner side of the roller brush cover to scrape off dirt and / or hair on the roller brush.

[0158] Continue to refer to Figure 34 , the upper housing 31 is provided with a lock 311, and the roller brush cover 38 can be released through the lock 311. The upper housing 31 is further provided with a pop-up mechanism 312. The pop-up mechanism 312 pops up the roller brush cover a certain distance after the roller brush cover is unlocked, facilitating the user to remove it. The upper housing 31 and the pivot bracket 78 jointly define the movement of the lower connecting member in the front-back and up-down directions, and only allow the lower connecting member to pivot around the rotating shaft.

[0159] Continue to refer to Figure 35, the lower housing 32 is equipped with structures such as a water pump 321, a circuit board 322, a roller brush drive assembly 8, an ozone generator 323, etc. The lower housing 32 is also provided with universal wheels and / or rollers. The water pump 321 and the roller brush drive assembly 8 are respectively arranged on opposite sides of the suction pipe 324, the ozone generator 323 is arranged behind the suction pipe 324, and the circuit board 322 is arranged behind the water pump 321. The water pump 321 is installed in the lower housing through a water pump cover, and a shock pad is arranged on the outer periphery of the water pump 321. The roller brush drive assembly 8 is installed in the lower housing through an assembly cover, and a shock pad is arranged on the outer periphery of the drive motor.

[0160] Leakage holes (not shown in the figure) are respectively arranged at both ends of the lower housing 32 along the axial direction of the roller brush, for guiding the liquid inside the cleaning head to the surface to be cleaned.

[0161] Reference Figures 36 - 38 , Figure 36 is a schematic structural diagram of the cleaning head from another angle in an embodiment. Figure 37 is a schematic cross-sectional view of the cleaning head in an embodiment. Figure 38 is a schematic structural diagram of the dispenser exposed outside the cleaning head in an embodiment. Continuing to refer to Figure 38 , a dispenser 35 is arranged on the cleaning head for spraying cleaning liquid onto the front roller brush. The dispenser 35 is installed in a groove defined by the lower housing. The dispenser 35 is a strip-shaped structure provided with a water guide groove, and spray holes are evenly arranged in the water guide groove to spray the cleaning liquid onto the roller brush. A roller brush wiper 36 is arranged below the dispenser, and its function is to scrape off most of the dirt on the roller brush before wetting the roller brush. The roller brush wiper 36 can be made of metal material or hard plastic.

[0162] Continuing to refer to Figure 36 and 37 , a floor wiper 37 is also arranged on the lower housing for scraping the surface to be cleaned. The floor wiper 37 is arranged behind the front roller brush, and during the forward movement, it keeps the missed dirt at the suction port, minimizing the missed dirt as much as possible. The floor wiper 37 is installed on the lower housing through a mounting bracket 39. At least one roller is also arranged on the mounting bracket 39. The mounting bracket 39 is detachably arranged on the lower housing. Users can clean the wiper and the roller by disassembling the mounting bracket. A through hole 391 is also arranged on the mounting bracket 39. The through hole 391 is communicated with the suction pipe, and a sealing cover 392 is arranged at the through hole to seal the through hole. When the sealing cover 392 is opened, it can be used to clean the dirt accumulated in the suction pipe 324 through the through hole. The floor wiper can be made of soft glue or hard glue material, and there is no limitation here.

[0163] Continuing to refer to Figure 37, the front roller brush 33 and the rear roller brush 34 rotate in opposite directions. A roller brush wiper 36 for scraping the dirt on the roller brush is provided in the roller brush cavity where the front roller brush 33 is located. The suction pipe 324 is connected to the front roller brush cavity to suck the scraped dirt into the sewage tank. The roller brush cavity where the rear roller brush 34 is located is not connected to the suction pipe and is a separate chamber. A rear wiper 325 is also provided at the rear roller brush cavity. The function of the rear wiper 325 is to scrape at least part of the dirt on the rear roller brush to prevent the dirt from entering the roller brush cavity. The rear wiper 325 is provided in front of the rear roller brush and is installed on the lower housing. The position of the rear wiper 325 in the height direction is slightly higher than the surface to be cleaned and does not contact the surface to be cleaned. The rear wiper is provided in front of the rear roller brush. When cleaning forward, the dirt on the rear roller brush can be continuously scraped off and then pushed forward by the rear roller brush, so that it will not be left on the surface to be cleaned. When the device moves backward, the scraped dirt remains on the surface to be cleaned and is then swept up by the front roller brush or sucked up by the suction nozzle and recycled into the sewage tank.

[0164] See Figures 39 - 41 , Figure 39 is a schematic cross-sectional view of the cleaning head at an angle in an embodiment. Figure 40 is Figure 39 an enlarged view of the structure of area A shown. Figure 41 is a schematic cross-sectional view of the cleaning head at another angle in an embodiment. In this embodiment, the cleaning head 3 includes a suction nozzle 329 and a suction pipe 324. The suction nozzle 329 is adjacent to or in contact with the surface to be cleaned. Stirring members such as roller brushes can be provided in the suction nozzle, or no stirring members can be included. The suction pipe 324 is in fluid communication with the suction nozzle 329 to recover the dirt on the surface to be cleaned through the suction nozzle 329. A storage space 328 is defined in the suction pipe 324. The storage space 328 is configured to store at least part of the dirt remaining in the suction pipe. The remaining dirt here refers to the part of the dirt attached to the pipe that flows back to the suction nozzle due to the action of gravity after the device stops. If there is a lot of dirt, it may flow back to the surface to be cleaned from the suction nozzle. The function of the storage space 328 is to temporarily store this part of the dirt so that when the device runs next time (self-cleaning or normal operation), it can be recycled into the sewage tank again. By providing a storage space in the suction pipe, the dirt flowing back after the device stops can be effectively collected, preventing the dirt attached to the suction pipe from flowing back to the surface to be cleaned due to the action of gravity and causing secondary pollution to the surface to be cleaned. The storage space is defined by the lower housing of the cleaning head. In one embodiment, the horizontal section and the lower housing are integrally molded, and the storage space is formed by a partial depression of the horizontal section downward.

[0165] Continue to refer to Figures 39 - 41The bottom wall of the cleaning head 3 is provided with a through hole connected to the storage space 328, and a sealing cover 392 is provided at the through hole to seal the storage space from the outside. After the sealing cover 392 is opened, the user can clean the storage space 328 and the suction pipe 324, so as to keep the pipe clean and prevent the inner wall of the suction pipe 324 from being attached with a lot of dirt and generating odor.

[0166] Of course, in other embodiments, the horizontal section 326 and the storage space 328 may also be separated. When the storage space 328 is defined by a separate part, the part can be taken out separately for cleaning. After the part defining the storage space is taken out, the user can clean the suction pipe through this position.

[0167] In one embodiment, the suction pipe along the airflow direction includes a horizontal section 326 and an inclined section 327 arranged in sequence. The horizontal section 326 here is not a characteristic that the section of the pipe is completely horizontally arranged, and there may be a certain inclination angle, but the angle should not be too large. The inclined section 327 refers to the section of the pipe that is inclined upward relative to the horizontal section, and the dirt enters the sewage tank or the pipe connected to the sewage tank through the inclined section. Since the inclined section is inclined, the inclined section has a bottom end and a top end in the vertical direction. In order to collect the dirt remaining in the entire inclined section, the storage space is set at the bottom end of the inclined section. Further, the storage space is set at the intersection of the horizontal section and the inclined section. Along the airflow direction, the bottom wall of the horizontal section gradually tilts downward, that is, from the suction nozzle to the storage space, the horizontal section gradually tilts downward along the airflow direction, so that the dirt remaining in the horizontal section 36 can also be effectively collected in the storage space 328.

[0168] Roller brush drive assembly

[0169] refer to Figures 42 - 43 , Figure 42 Schematic diagram of the structure of a driving component in one embodiment. Figure 43 for Figure 42 The cross-sectional schematic diagram of the drive assembly shown. The roller brush drive assembly 8 includes a drive motor 81, a reduction mechanism 82 and a transmission mechanism 83. The reduction mechanism 82 includes a planetary gear train that is transmission-connected to the output shaft of the motor. The planetary gear train includes a sun gear that is transmission-connected to the transmission shaft, a ring gear fixed relative to the sun gear and at least one planetary gear disposed between the sun gear and the ring gear, a driving wheel that is transmission-connected to the planetary wheel, and a driven wheel that is transmission-connected to the driving wheel. The driving wheel and the driven wheel can be of the same model. Both the driving wheel and the driven wheel output power to the corresponding roller brush through their respective transmission mechanisms. The reduction mechanism is disposed in the installation space defined by the front housing and the rear housing.

[0170] The transmission mechanism 83 includes an output gear drivingly connected to a driving wheel or a driven wheel, a transmission gear drivingly connected to the rotary brush, and a belt for drivingly connecting the output gear and the transmission gear. The transmission gear is drivingly connected to one end of the rotary brush through a petal-shaped transmission member.

[0171] The transmission mechanism 83 further includes a transmission bracket 831. The transmission bracket 831 includes a docking portion 832 docked with the rear housing and a mounting portion 833 defining a transmission space. The docking portion 832 and the mounting portion 833 can be integrally molded. A shock pad can be provided on the outer periphery of the docking portion and / or the mounting portion. By contacting the upper housing and / or the lower housing of the cleaning head through the shock pad, a shock-absorbing effect is achieved.

[0172] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A surface cleaning device, characterized in that, Comprising a main body within which a suction duct is defined; a motor assembly disposed in a motor assembly installation cavity defined by the main body for generating a suction air flow flowing along the suction duct; a sewage tank in fluid communication with the suction duct, the sewage tank being installed in a sewage tank installation cavity defined by the main body, the sewage tank being located below the motor assembly installation cavity; wherein, an electronic component installation cavity communicating with the motor assembly installation cavity is further defined within the main body, an air inlet is formed on the main body, and the cooling air flow generated by the motor assembly enters the electronic component installation cavity from the air inlet and then flows through the motor assembly installation cavity to sequentially cool the electronic components and the motor assembly, and an exhaust hole communicating with the sewage tank installation cavity is further formed on the main body, and the exhaust hole is used for guiding the cooling air flow to the sewage tank installation cavity; wherein, the suction air flow and the cooling air flow converge upstream of the impeller of the motor assembly to form a mixed air flow, the mixed air flow flows through the impeller and then is discharged through an air outlet channel, the air outlet channel is in fluid communication with the exhaust hole, and the exhaust hole is used for guiding the mixed air flow to the sewage tank installation cavity.

2. The surface cleaning device according to claim 1, wherein a water leakage hole is formed in the bottom wall of the sewage tank installation cavity for guiding at least part of the liquid in the mixed air flow to the surface to be cleaned and / or the cleaning head of the surface cleaning device.

3. The surface cleaning device according to claim 1, wherein the main body comprises a front frame and a rear frame, the front frame defines a sewage tank installation cavity and an electronic component installation cavity, the rear frame defines a clean water tank installation cavity, and the front frame and the rear frame jointly define the motor assembly installation cavity.

4. The surface cleaning device according to claim 3, wherein at least part of the electronic component installation cavity is located in front of the clean water tank installation cavity in the advancing direction of the surface cleaning device, and in the vertical direction, the motor assembly installation cavity is located above the clean water tank installation cavity and below the sewage tank installation cavity.

5. The surface cleaning device according to claim 1, wherein the motor assembly comprises a motor housing and a wet and dry motor disposed within the motor housing, the motor housing comprises an upper housing and a lower housing, and the lower housing defines an air inlet channel and an air outlet channel.

6. The surface cleaning device according to claim 5, wherein along the air flow direction, the cross-sectional area of at least part of the air inlet channel gradually decreases, the cross-section of the air outlet channel is strip-shaped, and both the air inlet channel and the air outlet channel are in communication with the sewage tank installation cavity defined by the main body.

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