Brush head module for cleaning machine and cleaning machine

Abstract

The present invention relates to a brush head module for a cleaning machine and a cleaning machine. The brush head module for a cleaning machine includes a housing with an air guide channel therein, the air guide channel having a dust suction port and an air outlet; a brush head rotatably disposed in the air guide channel, comprising a connecting plate and at least two rows of brush column groups disposed on the connecting plate, with a gap left between adjacent rows of brush column groups; the module is characterized in that it also includes a blade holder disposed on the connecting plate and located in the gap and rotating with the brush head, the blade holder being provided with a blade; a linkage mechanism having a power input end in transmission connection with the connecting plate and a power output end in driving connection with the blade holder, thereby driving the blade on the blade holder to swing back and forth in the gap. During the rotation process, the blade holder can swing back and forth in the gap substantially horizontally relative to the brush head to cut hair, thereby automatically cutting the hair on the brush head and preventing the hair from being entangled on the brush head, and the cleaned hair can be sucked into the air guide channel.

Description

Technical Field

[0001] The invention belongs to the field of household washing and cleaning, and particularly relates to a brush head module for a cleaning machine and the cleaning machine. Background Art

[0002] Current floor sweeping cleaning machines with a sweeping function include vacuum cleaners and floor sweeping robots, which mainly adopt a brushing and sweeping method, using a fan to suck debris on the ground into a storage box inside the machine, thereby completing the function of floor cleaning.

[0003] For example, the Chinese utility model patent "Portable Vacuum Cleaner" with patent number ZL201320814722.1 (authorization announcement number CN203597888U) discloses a portable vacuum cleaner including a housing, a handle provided on the top of the outer wall of the housing, a small motor, a driving gear, and a plurality of driven gears provided inside the housing, the driving gear being connected to the small motor, the driven gears being meshed with the driving gear, a dust collecting fan being connected to the output shaft of the driving gear, and a brush being connected to the output shaft of each driven gear. The brush structure of the vacuum cleaner in the above patent cleans the floor during rotation, but hair easily becomes entangled in the bristles during the cleaning process. When cleaning the brush, the entangled hair needs to be removed, which increases the difficulty of cleaning the brush.

[0004] Currently, for cleaning hair on the floor, there is a Chinese utility model, "A Hair Cleaning Brush," patented with patent number ZL201620186914.6 (authorization publication number CN205410228U), which discloses a hair cleaning brush comprising a brush rod, bristles disposed at the front end of the brush rod, a connecting rod disposed within the brush rod, a hair removal grid disposed at the front end of the connecting rod, and a grid for the bristles to pass through. A power source drives the connecting rod to move along the axis of the brush rod, thereby driving the hair removal grid to move along the bristles. Although this patent achieves hair cleaning on the floor, it cannot simultaneously clean dust and hair.

[0005] Therefore, there is a need to further improve the existing brush head module. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a brush head module for a cleaning machine that can clean tangled hair while vacuuming, in response to the current status of the above-mentioned prior art.

[0007] The second technical problem to be solved by the present invention is to provide a brush head module for combing hair off the brush head.

[0008] The third technical problem to be solved by the present invention is to provide a brush head module that accelerates the airflow velocity at the suction port to improve the cleaning ability.

[0009] The fourth technical problem to be solved by the present invention is to provide a cleaning machine with a hair cutting function.

[0010] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a brush head module for a cleaning machine, comprising

[0011] The housing has an air guide channel therein, the air guide channel having a dust suction port and an air outlet in fluid communication with the dust suction port, wherein the air outlet is located downstream of the dust suction port along the air flow path;

[0012] The brush head is used to clean the object to be cleaned and can be rotatably arranged in the air guide channel, including a connecting plate and at least two rows of brush column groups arranged on the connecting plate, with a gap left between two adjacent rows of brush column groups; it is characterized in that it also includes

[0013] a blade holder, which is arranged on the connecting plate, is located in the gap, and rotates together with the brush head, and is provided with a blade;

[0014] The linkage mechanism has a power input end in driving connection with the connecting plate and a power output end in driving connection with the blade holder, thereby driving the blade on the blade holder to swing back and forth in the gap, thereby cutting the hair embedded in the gap.

[0015] Preferably, when the opening of the dust suction port is in a downward state, the rotation axis of the brush head extends in the up and down direction, the blade holder is arranged basically horizontally, and the blade is arranged in the gap to move back and forth basically horizontally under the drive of the linkage mechanism.

[0016] There are many structural forms of the linkage mechanism, which can be in the form of a combination of a spring and a tool holder, or in the form of a combination of a guide groove and an extension rod. However, preferably, the linkage mechanism includes an extension rod arranged on the connecting plate and extending along the rotation axis of the brush head. There are two extension rods, which are arranged at intervals along the length direction of the tool holder and are basically perpendicular to the tool holder. The tool holder has a guide groove corresponding to the extension rod and extending along the length direction of the tool holder. The extension rod partially passes through the corresponding guide groove and is slidably limited in the guide groove.

[0017] In order to improve the stability of the tool holder movement, the outer peripheral wall of the extension rod is laterally protruded with a first protrusion and a second protrusion arranged at intervals along its length direction, and the portion of the extension rod located between the first protrusion and the second protrusion is always located in the guide groove.

[0018] Preferably, each row of brush column groups includes a plurality of brush columns extending along the rotation axis of the brush head and arranged at intervals, and the brush columns are provided on the connecting plate.

[0019] The present invention solves the second technical problem by further comprising a transmission assembly for driving the blade holder to move back and forth relative to the connecting plate along the rotation axis of the brush head. The power input end of the transmission assembly is in driving connection with the brush head, and the power output end of the transmission assembly is in driving connection with the blade holder. The power input end of the transmission assembly can also be pneumatically driven.

[0020] There are many structural forms of the transmission assembly, but preferably, the transmission assembly includes

[0021] a fixed plate connected to the outer wall of the housing and provided with at least two sliding members located on the periphery of the rotating shaft of the brush head and arranged circumferentially at intervals, wherein when the opening of the dust suction port is in a downward state, the fixed plate is located on the housing, and the sliding members are provided on the lower surface of the fixed plate;

[0022] A connecting rod, the first end of which is located in the air guide channel and is connected to the blade holder after passing through the connecting plate, and only moves back and forth relative to the connecting plate along the rotation axis of the brush head. The second end of the connecting rod is located between the outer shell and the fixed plate, and a slideway is formed on the end surface of the second end, which slides with the sliding member. The slideway has protrusions that are the same in number as the sliding member and extend toward the fixed plate. When the blade holder is in a position adjacent to the fixed plate, the sliding member is located between two corresponding adjacent protrusions. When the blade holder is in a position away from the fixed plate, the sliding member is against the corresponding protrusion.

[0023] Preferably, the second end of the connecting rod is sleeved with an annular body located between the outer shell and the fixed plate, and the slideway is formed between the connecting rod and the annular body. The sliding member is a roller rotatably arranged on the fixed plate. The outer peripheral wall of the connecting rod extends outward to form the protrusion, and the other end of the protrusion is connected to the inner peripheral wall of the annular body.

[0024] In order to completely cut the hair wrapped around the brush post, when the blade holder is located at the position farthest from the fixing plate, the blade is partially exposed at the free end of the brush post.

[0025] In order to make the connecting rod automatically return to the initial position, an elastic member is also included which acts on the connecting rod and always makes the connecting rod have a tendency to move toward the fixing plate.

[0026] The driving force for the rotation of the brush head can be wind power or active drive, but from the perspective of the reliability of the brush head rotation, it is preferably also provided with a driving mechanism for driving the brush head to rotate, and the power output end of the driving mechanism is connected to the brush head drive.

[0027] Specifically, an opening is provided near the center of the connecting plate for the second end of the connecting rod to pass downward, and an extension tube is formed along the periphery of the opening toward the fixed plate. The other end of the extension tube is connected to the driving mechanism, and the connecting rod slides along the extension tube and is partially located inside the extension tube.

[0028] Preferably, there are multiple air guide channels, which are arranged side by side and spaced apart. The driving mechanism includes

[0029] a motor, disposed on the housing and outside the air guide channel, having an output shaft arranged side by side with the rotating shaft of the brush head;

[0030] A driving gear is mounted on the output shaft of the motor;

[0031] The driven gear is arranged corresponding to the brush head, installed on the corresponding extension tube, and located between the slideway and the shell. One of the driven gears is meshed with the driving gear, and the driven gears of two adjacent brush heads are meshed.

[0032] The technical solution adopted by the present invention to solve the third technical problem mentioned above is: the brush head is located near the center of the air guide channel, and an air inlet for tangential wind entry is opened on the side wall of the air guide channel, and the air inlet is connected to the dust suction port.

[0033] In order to accelerate the flow of the mixed airflow, the shell is provided with a liquid guide channel for communicating with the liquid supply component of the cleaning machine. The liquid guide channel has a liquid outlet, and along the fluid flow path, the liquid outlet is located downstream of the air inlet.

[0034] The technical solution adopted by the present invention to solve the fourth technical problem mentioned above is: a cleaning machine with the above-mentioned brush head module, characterized in that it also includes a fan and a separation module for separating the mixture of water and dust. Along the air flow path, the separation module is located between the brush head module and the fan, and the inlet of the separation module is fluidly connected to the air outlet of the brush head module, and the exhaust port of the separation module is connected to the inlet of the fan.

[0035] Preferably, the cleaning machine is a vacuum cleaner or a sweeping robot.

[0036] Compared with the prior art, the advantages of the present invention are that the brush head module for the cleaning machine can vacuum the object to be cleaned, and the blade holder of the brush head module rotates together with the brush head. During the rotation, the blade holder can swing back and forth in the gap basically along the horizontal direction relative to the brush head to cut the hair, thereby automatically cutting the hair on the brush head to prevent the hair from being entangled on the brush head, and the cleaned hair can be sucked into the air guide channel. On the one hand, the automatic cleaning of the hair on the brush head is realized, and there is no need for manual cleaning, which is convenient for cleaning. On the other hand, the cleaned hair can be sucked away in time to keep the object to be cleaned clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the structure of the brush head module of this embodiment;

[0038] Figure 2 for Figure 1 A structural diagram from another angle;

[0039] Figure 3 for Figure 1 sectional view of

[0040] Figure 4 for Figure 1 a cross-sectional view from another angle;

[0041] Figure 5 2 is a structural diagram from another angle;

[0042] Figure 6 for Figure 1 Schematic diagram of part of the structure;

[0043] Figure 7 for Figure 6 sectional view of

[0044] Figure 8 is a structural diagram of the connecting rod;

[0045] Figure 9 Schematic diagram of the structure of the vacuum cleaner of this embodiment. DETAILED DESCRIPTION

[0046] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0047] like Figure 9As shown, the cleaning machine of the embodiment of the present invention is a vacuum cleaner, and the object to be cleaned is the ground. The vacuum cleaner includes a brush head module 01, a fan 4, and a separation module for separating a mixture of water and dust. Along the airflow path, the separation module is located between the brush head module 01 and the fan 4. The inlet of the separation module is in fluid communication with the air outlet 113 of the brush head module 01, and the outlet of the separation module is connected to the inlet of the fan 4. Under the action of the fan 4, a negative pressure is formed in the brush head module and the separation module, thereby sucking dust, water, and other garbage into the brush head module through the dust suction port 111, and then being separated and discharged by the separation module. The separation module can adopt any structure in the prior art and will not be described in detail in this embodiment.

[0048] like Figure 9 As shown, the brush head module 01 for a cleaning machine includes a brush head assembly 012 and a housing 011. The brush head assembly 012 includes a housing 1, a brush head 13, a blade holder 18, an elastic member, a linkage mechanism, and a transmission assembly 17. The housing 011 has an opening at a position corresponding to the suction port 111. The brush head assembly 012 is partially located inside the housing 011, and the brush head 13 of the brush head assembly 012 is partially exposed below the opening. Figures 1 to 8 As shown, the housing 1 has an air guide channel 11 inside, and the air guide channel 11 has a dust suction port 111 and an air outlet 113 opening downward. Along the fluid flow path, the air outlet 113 is located downstream of the dust suction port 111. Figure 3 As shown, the brush head 13 is located near the center of the air guide channel 11, with a gap 135 between the outer periphery of the brush head 13 and the inner peripheral wall of the air guide channel 11. An air inlet 112 is tangentially formed on the side wall of the air guide channel 11 for tangential air entry. The air inlet 112 is connected to the dust suction port 111. There are at least two air guide channels 11 as described above. In this embodiment, there are four air guide channels 11 arranged side by side, with the air inlet 112 of each air guide channel 11 located on the same side of the housing 1.

[0049] In order to speed up the flow of fluid into the air inlet, the air inlet 112 is connected to an air inlet channel 114, which is located in front of the air guide channel 11 and gradually shrinks along the air flow path. Figure 1 As shown, the air inlet channel 114 includes a first connecting wall 118 extending front to back and a second connecting wall 119 extending from back to front gradually away from the first connecting wall 118. The air inlets 112 of the two air guide channels 11 in the middle are arranged adjacent to each other, and both share the same first connecting wall 118; the air inlets 112 of the two air guide channels 11 on both sides are arranged far apart, and the ends of the second connecting walls 119 of the two are connected to form a V-shaped guide wall, as shown in Figure 1 for details.

[0050] like Figure 1 As shown, the housing 1 is provided with a liquid guide channel 12 for communicating with the liquid supply assembly of the cleaning machine. There is a liquid guide channel 12 between two adjacent air guide channels 11. The liquid guide channel 12 has a liquid outlet 121 opening downward. Along the fluid flow path, the liquid outlet 121 is located downstream of the adjacent air inlet 112.

[0051] The brush head 13 is used to clean the object to be cleaned. Figure 2 As shown, the brush head 13 is rotatably arranged in the air guide channel 11 through the rotating shaft. The axis of the rotating shaft of the brush head 13 is the rotating axis of the brush head 13. In this embodiment, as shown in FIG. Figure 3 As shown, the rotation axis of the brush head 13 extends in the up-down direction, and the brush head 13 includes a substantially horizontally arranged connecting plate 131 and at least two rows of brush column groups arranged on the connecting plate 131, as shown in FIG. Figure 2 and Figure 3 As shown, there is a gap 1300 between two adjacent rows of brush column groups, and each row of brush column groups includes a plurality of brush columns 1321 extending up and down and arranged at intervals, and the brush columns 1321 are arranged on the lower surface of the connecting plate 131. Figure 3 、 Figure 4 and Figure 6 As shown, the tool holder 18 is arranged on the connecting plate 131, and is located below the connecting plate 131 and rotates with the connecting plate 131, and the tool holder 18 is provided with a blade 181 extending up and down; the tool holder in this embodiment is strip-shaped, and there are multiple blades 181 and they are arranged at intervals along the length direction of the tool holder 18.

[0052] like Figure 2 As shown, in order to realize the up and down movement of the blade holder 18 relative to the connecting plate 131, the blade holder 18 can move up and down relative to the connecting plate 131 under the drive of the transmission assembly 17. The power input end of the transmission assembly 17 is connected to the brush head 13, and the power output end of the transmission assembly 17 is connected to the blade holder 18. Figure 3 、 Figure 4 and Figure 7As shown, the transmission assembly 17 includes a fixed plate 171 and a connecting rod 172. The fixing plate 171 is connected to the outer wall of the shell 1 and is located above the shell 1. Two sliding members are provided on the lower surface of the fixing plate 171, which are located on the periphery of the rotating shaft of the brush head 13 and are arranged circumferentially at intervals. The sliding member is a roller 1711 rotatably arranged on the fixing plate 171, and there are two rollers 1711; the connecting rod 172 is arranged vertically, and the lower end (first end) of the connecting rod 172 is located in the air guide channel 11 and is connected to the tool holder 18 after passing through the connecting plate 131. The upper end (second end) of the connecting rod 172 is located between the shell 1 and the fixing plate 171, and the upper end surface of the connecting rod 172 is formed with a slideway 170 that slides with the roller 1711. The slideway 170 has a protrusion 1721 that is the same in number as the roller 1711 and extends upward. Specifically, as shown in FIG. Figure 4 and Figure 7 As shown, the upper end of the connecting rod 172 is provided with an annular body 173 located between the housing 1 and the fixing plate 171. The slideway 170 is provided between the connecting rod 172 and the annular body 173. The outer peripheral wall of the connecting rod 172 extends outward to form the above-mentioned protrusion 1721. The other end of the protrusion 1721 is connected to the inner peripheral wall of the annular body 173. When the tool holder 18 is in the lowest position, the roller 1711 abuts against the corresponding protrusion 1721. Figure 7 As shown, when the tool holder 18 is at the highest position, the roller 1711 is located in the recessed area between two corresponding adjacent protrusions 1721 .

[0053] like Figure 3 and Figure 4 As shown, the connecting plate 131 is provided with an opening near the center thereof for the upper end of the connecting rod 172 to pass downwardly, and an extension tube 1311 is formed extending upwardly from the periphery of the opening. The upper end of the extension tube 1311 is connected to the driving mechanism 14, and the connecting rod 172 slides up and down and is partially located in the extension tube 1311. Figure 3 As shown, the elastic member acts on the connecting rod 172 and always makes the connecting rod 172 have a tendency to move upward. Specifically, the elastic member is a spring 19 that is sleeved on the periphery of the connecting rod 172 and located in the sleeve 1311. The inner peripheral wall of the opening extends inward to form a step. The lower end of the spring 19 can be against the step, and the upper end of the spring 19 can be against a part of the connecting rod 172, so that the spring 19 is in an energy storage state.

[0054] like Figure 5As shown, the brush head 13 rotates around its own rotation axis under the drive of the driving mechanism 14, and the power output end of the driving mechanism 14 is connected to the brush head 13. The aforementioned driving mechanism 14 includes a motor 141, a driving gear 142 and a driven gear 143. Each brush head 13 corresponds to a driven gear 143, wherein the motor 141 is arranged on the housing 1 and is located outside the air guide channel 11. The motor 141 has a vertically extending output shaft; the driving gear 142 is mounted on the output shaft of the motor 141; the driven gear 143 is mounted on the extension tube 1311 corresponding to the brush head 13 and is located between the annular body 173 and the housing 1. One of the driven gears 143 is meshed with the driving gear 142, and the driven gears 143 of two adjacent brush heads 13 are meshed, thereby realizing the rotation of each brush head 13 under the drive of the motor 141 and the transmission meshing of the driving gear 142 and the driven gear 143. During the rotation of the brush head 13 , the connecting rod 172 rotates along with the brush head 13 , and the blade holder 18 moves up and down under the action of the roller 1711 , the protrusion 1721 and the slide 170 .

[0055] The blade holder 18 can move back and forth in the horizontal direction relative to the connecting plate under the action of the linkage mechanism. The linkage mechanism is connected to the connecting plate 131 and the blade holder 18 at the same time, so that the blade holder 18 can swing back and forth in the gap 1300 substantially in the horizontal direction to cut hair. Figure 4 and Figure 7 As shown, the linkage mechanism includes two extension rods 1315 disposed on the connecting plate 131 and extending downward. The extension rods 1315 are spaced apart along the length of the blade holder 18. A guide slot 182 extending along the length of the blade holder 18 is defined on the blade holder 18, with each extension rod 1315 corresponding to one guide slot 182. The outer peripheral wall of the extension rods 1315 is laterally protruded with a first protrusion 1316 and a second protrusion 1317 spaced apart from each other. The first protrusion 1316 is positioned above the second protrusion 1317. The portion of the extension rod 1315 located between the first protrusion 1316 and the second protrusion 1317 is always located within the guide slot 182 and is capable of sliding back and forth laterally along the length of the guide slot 182. Thus, as the brush head 13 rotates, the extension rods 1315 move back and forth laterally within the guide slot 182, thereby cutting hair embedded in the gap 1300 during cleaning.

[0056] As used herein, "fluid communication" refers to the spatial positional relationship between two components or parts (hereinafter collectively referred to as the first part and the second part), i.e., the ability of a fluid (gas, liquid, or a mixture of the two) to flow and / or be transported from the first part to the second part along a flow path. The communication between the first and second parts may be direct, or indirect via at least one third party, such as a fluid channel such as a pipe, channel, conduit, guide, hole, groove, or a chamber allowing fluid flow, or a combination thereof. The term "vertical" as used in the foregoing description and claims includes, but is not limited to, vertical.

[0057] Directional terms such as "front," "rear," "up," "down," "left," "right," "side," "top," and "bottom" are used in the present specification and claims to describe various exemplary structural components and elements of the present invention. However, these terms are used herein for convenience only and are based on the exemplary orientations shown in the accompanying drawings. Because the disclosed embodiments of the present invention can be arranged in various orientations, these directional terms are intended for illustration only and should not be construed as limiting. For example, "up" and "down" are not necessarily defined as directions opposite to or consistent with the direction of gravity.

Claims

1. A brush head module for a cleaning machine, comprising A housing (1) having an air guide channel (11) therein, the air guide channel (11) having a dust suction port (111) and an air outlet (113) in fluid communication with the dust suction port (111), wherein the air outlet (113) is located downstream of the dust suction port (111) along an air flow path; The brush head (13) is used to clean the object to be cleaned and is rotatably arranged in the air guide channel (11), comprising a connecting plate (131) and at least two rows of brush column groups arranged on the connecting plate (131), with a gap (1300) left between two adjacent rows of the brush column groups; and is characterized in that: Also includes a knife holder (18) disposed on the connecting plate (131), located in the gap (1300), and rotating together with the brush head (13); a blade (181) is provided on the knife holder (18); A linkage mechanism, wherein a power input end thereof is in driving connection with the connecting plate (131), and a power output end thereof is in driving connection with the tool holder (18), thereby driving the blade (181) on the tool holder (18) to swing back and forth within the gap (1300); When the opening of the dust suction port (111) is in a downward state, the rotation axis of the brush head (13) extends in the up-down direction, the blade holder (18) is arranged substantially horizontally, and the blade (181) is arranged in the gap (1300) to move back and forth substantially horizontally under the drive of the linkage mechanism; The linkage mechanism includes an extension rod (1315) provided on the connecting plate (131) and extending along the rotation axis of the brush head (13), two extension rods (1315) are arranged at intervals along the length direction of the tool holder (18) and are substantially perpendicular to the tool holder (18), the tool holder (18) has a guide groove (182) corresponding to the extension rod (1315) and extending along the length direction of the tool holder (18), the extension rod (1315) partially passes through the corresponding guide groove (182) and is slidably limited in the guide groove (182); The outer peripheral wall of the extension rod (1315) is laterally protruded with a first protrusion (1316) and a second protrusion (1317) spaced apart along its length direction, and the portion of the extension rod (1315) located between the first protrusion (1316) and the second protrusion (1317) is always located in the guide groove (182); Each row of brush column groups comprises a plurality of brush columns (1321) extending along the rotation axis of the brush head (13) and arranged at intervals, and the brush columns (1321) are arranged on the connecting plate (131).

2. The brush head structure according to claim 1, characterized in that: The invention also includes a transmission assembly (17) for driving the tool holder (18) to move back and forth relative to the connecting plate (131) along the rotation axis of the brush head (13), wherein the power input end of the transmission assembly (17) is in driving connection with the brush head (13), and the power output end of the transmission assembly (17) is in driving connection with the tool holder (18).

3. The brush head structure according to claim 2, characterized in that: The transmission assembly (17) includes a fixed plate (171) connected to the outer wall of the housing (1) and provided with at least two sliding members located on the periphery of the rotating shaft of the brush head (13) and spaced apart in the circumferential direction; when the opening of the dust suction port (111) is in a downward state, the fixed plate (171) is located above the housing (1), and the sliding members are provided on the lower surface of the fixed plate (171); The connecting rod (172) has a first end located in the air guide channel (11) and is connected to the blade holder (18) after passing through the connecting plate (131), and moves back and forth only relative to the connecting plate (131) along the rotation axis of the brush head (13). The second end of the connecting rod (172) is located between the housing (1) and the fixed plate (171), and a slideway (170) for sliding cooperation with the sliding member is formed on the end surface of the second end. The slideway (170) has protrusions (1721) that are the same in number as the sliding members and extend toward the fixed plate (171). When the blade holder (18) is in a position adjacent to the fixed plate (171), the sliding member is located between two corresponding adjacent protrusions (1721). When the blade holder (18) is in a position away from the fixed plate (171), the sliding member abuts against the corresponding protrusion (1721).

4. The brush head structure according to claim 3, characterized in that: The second end of the connecting rod (172) is sleeved with an annular body (173) located between the outer shell (1) and the fixed plate (171); the slideway (170) is provided between the connecting rod (172) and the annular body (173); the sliding member is a roller (1711) rotatably arranged on the fixed plate (171); the outer peripheral wall of the connecting rod (172) extends outward to form the protrusion (1721); the other end of the protrusion (1721) is connected to the inner peripheral wall of the annular body (173).

5. The brush head structure according to claim 4, characterized in that: When the blade holder (18) is located at a position farthest from the fixed plate (171), the blade (181) is partially exposed at the free end of the brush column (1321).

6. The brush head module according to claim 5, characterized in that: It also includes an elastic member that acts on the connecting rod (172) and always makes the connecting rod (172) have a tendency to move toward the fixing plate (171).

7. The brush head module according to claim 6, characterized in that: It also includes a driving mechanism (14) for driving the brush head (13) to rotate, and a power output end of the driving mechanism (14) is drivingly connected to the brush head (13).

8. The brush head module according to claim 7, characterized in that: An opening is provided near the center of the connecting plate (131) for the second end of the connecting rod (172) to pass downward, and an extension tube (1311) is formed along the periphery of the opening in the direction of the fixed plate (171). The other end of the extension tube (1311) is connected to the driving mechanism (14), and the connecting rod (172) slides along the extension tube (1311) and is partially located in the extension tube (1311).

9. The brush head module according to claim 8, characterized in that: There are multiple air guide channels (11) arranged side by side and spaced apart. The driving mechanism (14) includes A motor (141) is provided on the housing (1) and is located outside the air guide channel (11), and has an output shaft arranged side by side with the rotation axis of the brush head (13); A driving gear (142) is mounted on the output shaft of the motor (141); The driven gear (143) is provided corresponding to the brush head (13), mounted on the corresponding extension tube (1311), and located between the slideway (170) and the housing (1), wherein one of the driven gears (143) is meshed with the driving gear (142), and the driven gears (143) of two adjacent brush heads (13) are meshed.

10. The brush head module according to claim 9, characterized in that: The brush head (13) is located near the center of the air guide channel (11), and an air inlet (112) for tangential air entry is provided on the side wall of the air guide channel (11), and the air inlet (112) is connected to the dust suction port (111).

11. The brush head module according to claim 10, characterized in that: The housing (1) is provided with a liquid guide channel (12) for communicating with a liquid supply assembly of the cleaning machine. The liquid guide channel (12) has a liquid outlet (121). Along the fluid flow path, the liquid outlet (121) is located downstream of the air inlet (112).

12. A cleaning machine having the brush head module according to any one of claims 1 to 11, characterized in that: It also includes a fan (4) and a separation module for separating a mixture of water and dust. Along the air flow path, the separation module is located between the brush head module (01) and the fan (4). The inlet of the separation module is fluidically connected to the air outlet (113) of the brush head module (01), and the outlet of the separation module is connected to the inlet of the fan (4).

13. The cleaning machine according to claim 12, characterized in that: The cleaning machine is a vacuum cleaner or a sweeping robot.

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