Roller brush device and robot

Abstract

The present application discloses a roller brush device and robot, comprising a housing chamber; a roller rotatably disposed within the housing chamber; an obstacle-crossing portion disposed on the outer periphery of the roller; a velvet layer disposed on the outer periphery of the roller; a drive unit capable of driving the roller to rotate and thereby drive the velvet layer; and a water supply device for supplying cleaning agent to the velvet layer. The roller is supported on a raised obstacle on the ground via the obstacle-crossing portion to elevate the roller brush device. The roller brush device and robot of the present application provide both cleaning and obstacle-crossing capabilities.

Description

Technical Field

[0001] The present application relates to the field of robot cleaning, and in particular to a roller brush device and a robot. Background Art

[0002] A floor scrubber robot is a cleaning tool used to clean floors, floors, or carpets. A typical floor scrubber robot is equipped with a roller brush mechanism on its bottom. While cleaning the floor, the robot sprays liquid, such as detergent or water, to moisten the roller brush mechanism. After the roller brush mechanism finishes cleaning, the dirty water is recycled back into the robot. If there are obstacles on the floor, the roller brush mechanism supports the robot, raising the robot's height and allowing it to navigate over them.

[0003] In the related art, the roller brush device of the floor cleaning robot usually adopts a long-bristled roller brush or a short-bristled roller brush.

[0004] When a short-bristle roller brush is used to clean the floor, the short bristles need to be scrubbed at a low speed, and then the dirty water is squeezed out by squeezing. The advantage is that due to the large diameter of the roller of the short-bristle roller brush, when encountering an obstacle, the roller will drive the entire roller brush assembly to lift up and thus pass over the obstacle, that is, the obstacle-crossing ability is strong. The disadvantage is that after the short-bristle roller brush has been running for a long time, stains are easily accumulated at the squeezed area, and the short bristles on the short-bristle roller brush are easy to fall over, resulting in a weak cleaning ability.

[0005] When cleaning the floor, the long-bristled roller brush runs at high speed and wipes the floor, throwing out dirty water through the centrifugal principle. The advantage is that the bristles do not need to be squeezed and are always in a fluffy state with strong cleaning ability. The disadvantage is that the roller diameter is small and the obstacle-crossing ability is weak. Summary of the Invention

[0006] In view of this, the embodiments of the present application hope to provide a roller brush device and a robot that can take into account both cleaning ability and obstacle-crossing ability.

[0007] To achieve the above objectives, the technical solution of the embodiment of the present application is implemented as follows:

[0008] A roller brush device includes a accommodating chamber; a roller rotatably arranged in the accommodating chamber; an obstacle-crossing portion arranged at the outer periphery of the roller; a fluff layer arranged on the outer periphery of the roller; a driving unit capable of driving the roller to rotate to drive the fluff layer; and a water supply device for providing cleaning agent to the fluff layer; the roller is supported on a raised obstacle on the ground by the obstacle-crossing portion to raise the height of the roller brush device.

[0009] In one embodiment, the obstacle-crossing portion is a convex rib arranged in a spiral direction around the circumference of the drum; and / or, the obstacle-crossing portion is a circular ring arranged around the outer circumference of the drum; and / or, the obstacle-crossing portion is an arc segment arranged around the outer circumference of the drum.

[0010] In one embodiment, the radial height of the obstacle-crossing portion is greater than or equal to one-third of the radius of the drum; and / or the radial height of the fluff layer is greater than the radial height of the obstacle-crossing portion.

[0011] In one embodiment, the obstacle surmounting portion is detachably connected to the drum; or, the obstacle surmounting portion is integrally connected to the drum.

[0012] In one embodiment, the roller brush device includes hard bristles, and the hard bristles are arranged on the top end of the obstacle crossing portion away from the roller.

[0013] In one embodiment, the pile layer is bonded to the outer periphery of the drum.

[0014] In one embodiment, the roller brush device includes a accommodating cylinder, a connecting rod and a fixed block. The side wall of the accommodating cylinder is opened to form the accommodating cavity. Both ends of the connecting rod are hinged to the fixed block and the accommodating cylinder respectively.

[0015] In one embodiment, the roller brush device includes a scraper bar, and the scraper bar is arranged on the edge of the side wall opening of the accommodating cylinder close to the ground.

[0016] In one embodiment, the water supply device includes at least one water injection nozzle and a drip hole. The water injection nozzle is arranged on the side wall of the accommodating tube. The drip holes are distributed on the inner wall surface of the accommodating tube close to the fluff layer and are connected to the water injection nozzle.

[0017] A robot comprises a negative pressure unit, a water tank, and the above-mentioned roller brush device; at least one sewage outlet is provided on the cavity wall of the accommodating cavity; the negative pressure unit is connected to the sewage outlet, and the water tank is connected to the water supply device.

[0018] A roller brush device and a robot according to an embodiment of the present application are provided with a roller brush device, which includes a housing chamber, a roller, an obstacle-crossing portion, a fluff layer, a drive unit, and a water supply device. The roller is rotatably arranged in the housing chamber, and the obstacle-crossing portion is arranged on the outer periphery of the roller. The roller is supported on a raised obstacle on the ground by the obstacle-crossing portion to raise the height of the roller brush device. Under the premise of the same drive unit, when crossing raised obstacles of the same height, the greater the height of the obstacle-crossing portion, the smaller the radius of the required roller, thereby effectively reducing the diameter of the roller of the present application without affecting the obstacle-crossing capability. The smaller the radius of the roller, the longer the fluff layer on the roller can be designed, which is conducive to the fluff layer running at high speed to wipe the floor outside the housing chamber, and to throw out dirty and dirty water in the housing chamber through the centrifugal principle, without the need to squeeze out the dirty and dirty water. The fluff layer is always in a fluffy state with strong cleaning capability, taking into account both cleaning capability and obstacle-crossing capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a roller brush device according to an embodiment of the present application;

[0020] Figure 2 for Figure 1 A side view of a roller brush device;

[0021] Figure 3 for Figure 1 A structural diagram of the roller brush device from another perspective;

[0022] Figure 4 This is a schematic structural diagram of the roller brush device according to an embodiment of the present application, in which the roller, obstacle crossing portion, and pile layer are omitted;

[0023] Figure 5 This is a schematic structural diagram of a roller and an obstacle-crossing portion according to an embodiment of the present application;

[0024] Figure 6 for Figure 5 AA section view;

[0025] Figure 7 This is a schematic structural diagram of a roller and an obstacle-crossing portion according to another embodiment of the present application;

[0026] Figure 8 for Figure 7 BB cross-sectional view;

[0027] Figure 9 This is a structural diagram of a roller and an obstacle crossing portion according to another embodiment of the present application;

[0028] Figure 10 for Figure 9 CC cross-sectional view;

[0029] Figure 11 This is a structural diagram of a roller and an obstacle-crossing portion according to another embodiment of the present application;

[0030] Figure 12 for Figure 11 DD cross-sectional view;

[0031] Figure 13 This is a schematic diagram of a roller brush device crossing a ground obstacle according to an embodiment of the present application, wherein the drive unit and the water supply device are omitted;

[0032] Figure 14 This is a schematic diagram of the roller of a roller brush device in the prior art crossing over a ground obstacle. DETAILED DESCRIPTION

[0033] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation methods should be understood as an explanation of this application and should not be regarded as an improper restriction on this application.

[0034] In the description of the embodiments of the present application, the directions or positional relationships of "up", "down", "left", "right", "front", "back" are based on the directions or positional relationships shown in the accompanying drawings. It should be understood that these directions are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present application. In addition, for ease of understanding, in the description of the embodiments of the present application, unless otherwise specified, the axial, circumferential and radial directions are Figure 1 The axial, circumferential and radial directions of the middle roller.

[0035] like Figures 1 to 13 As shown, a robot for cleaning the floor 9 includes a negative pressure unit (not shown), a water tank (not shown), and a roller brush device 400.

[0036] The roller brush device 400 includes a housing chamber 11, a roller 21, an obstacle-crossing portion 22, a fluff layer 3, a drive unit 4, and a water supply device 5. At least one sewage outlet 17 is provided on the wall of the housing chamber 11. The roller 21 is rotatably disposed within the housing chamber 11. The obstacle-crossing portion 22 is disposed on the periphery of the roller 21. The fluff layer 3 is disposed on the periphery of the roller 21. The drive unit 4 is capable of driving the roller 21 to rotate, thereby driving the fluff layer 3 and the obstacle-crossing portion 22. The water supply device 5 is used to drip water onto the fluff layer 3 to facilitate the fluff layer 3 cleaning the floor 9.

[0037] Specifically, the roller brush device 400 comprises a semi-enclosed accommodating chamber 11, a roller 21, an obstacle-crossing portion 22, a pile layer 3, a drive unit 4, and a water supply device 5. The accommodating chamber 11 is semi-enclosed, meaning it has an opening in the sidewall of a accommodating cylinder 12 (described below). When the roller brush device 400 is mounted on the robot, the opening should be aligned with the ground surface 9. The roller 21 is rotatably disposed within the accommodating chamber 11. The roller 21 is a hollow cylindrical structure with engaging portions 21a formed at both ends. A rotating shaft 15 is provided at each end of the accommodating chamber 11, which mates with the engaging portions 21a for circumferential transmission and position limiting.

[0038] At least one sewage outlet 17 is defined on the wall of the accommodating chamber 11. This outlet 17 can be connected to one end of a flexible pipe (not shown). The other end of the flexible pipe is connected to a negative pressure unit, thereby connecting the negative pressure unit to the sewage outlet 17. The negative pressure unit can generate sufficient negative pressure to pump sewage out of the accommodating chamber 11 through the sewage outlet 17.

[0039] The fluff layer 3 is arranged on the outer peripheral surface of the drum 21, and the water supply device 5 is used to drip the cleaning agent into the fluff layer 3. At least part of the drum 21 is accommodated in the accommodating cavity 11, and the part of the fluff layer 3 extending radially from the drum 21 is exposed from the accommodating cavity 11 and aligned with the ground 9; the driving unit 4 can drive the drum 21 to rotate to drive the fluff layer 3 and the obstacle crossing part 22 to rotate accordingly. The driving unit 4 can be an electric motor or a motor. The driving unit 4 can be connected to the rotating shaft 15 through a transmission structure such as gears, belts or chains. The gear transmission has the advantages of relatively accurate transmission, high efficiency, compact structure, reliable operation and long life. The belt transmission has the advantages of simple structure, low cost, stable operation and low noise. The chain transmission has the advantages of reliable operation, high efficiency, large transmission power and strong overload capacity.

[0040] The fluff layer 3 is made of a soft, deformable material that can absorb water or detergents, such as polyester, cotton, silk, nylon, etc. The fluff layer 3 does not have supporting capacity and relies on high-speed operation to achieve floor mopping. Specifically, when the drum 21 rotates, it drives the fluff layer 3 to rotate. The fluff layer 3 moistened by the water supply device 5 is transferred to the outside of the accommodating chamber 11 and contacts the ground 9. Then, it is rotated to the area inside the accommodating chamber 11, and continuously moves at high speed with the ground 9 to achieve high-speed floor mopping, thereby achieving cleaning of the ground 9; the fluff layer 3 entering the accommodating chamber 11 is centrifugal to throw out dirty and sewage, and the dirty and sewage are collected at the sewage outlet 17. The negative pressure unit can generate sufficient negative pressure to pump out the sewage in the accommodating chamber 11 through the sewage outlet 17; the fluff layer 3 after centrifugal dehydration continues to rotate to the area corresponding to the water supply device 5, and the water tank (not marked) of the robot is connected to the water supply device 5. The cleaning agent is stored in the water tank, which may be an oil detergent, clean water or a mixture thereof. The cleaning agent in the water tank is fed into the water supply device 5 by quantitative pumping or the gravity of the cleaning agent itself, and then flows into the accommodating cavity 11, so that the fluff layer 3 reabsorbs the clean cleaning agent and rotates outside the accommodating cavity 11 again to clean the floor. The above process is cyclically repeated to enable the robot to clean the floor normally.

[0041] In some non-limiting embodiments, the fluff layer 3 and the outer periphery of the drum 21 can be bonded, that is, glue is applied between the fluff layer 3 and the outer periphery of the drum 21 to achieve bonding. In some non-limiting embodiments, the fluff layer 3 and the outer periphery of the drum 21 are detachably connected, such as Velcro bonding, to facilitate maintenance and replacement of the fluff layer 3.

[0042] In some non-limiting embodiments, the fluff layer 3 may be formed with an avoidance groove 3a to avoid the obstacle-crossing portion 22, that is, the fluff layer 3 is arranged in the area of ​​the outer periphery of the drum 21 that excludes the obstacle-crossing portion 22. In other non-limiting embodiments, the top 22a of the obstacle-crossing portion 22 may also be provided with a partial structure of the fluff layer 3 to enhance the cleaning effect.

[0043] The roller 21 is supported on a raised obstacle 91 on the ground 9 by the obstacle climbing portion 22 to raise the height of the roller brush device 400 .

[0044] For related technologies, see Figure 14 As shown, the outer periphery of the drum 21' has no obstacle-crossing portion, and the outer periphery of the drum 21' directly contacts the raised obstacle 91, thereby supporting the drum 21' to be lifted relative to the raised obstacle 91. The angle a is formed between the line connecting the support point of the drum 21' and the axis of the drum 21' and the vertical direction. The radius R' of the drum 21' and the height H of the raised obstacle 91 directly affect the size of the angle a. When the height H of the raised obstacle 91 remains unchanged, the smaller the radius R' of the drum 21', the larger the angle a. At this time, the greater the resistance to the rotation of the drum 21' to cross the raised obstacle 91, and the greater the driving force required by the drive unit (not shown). If the driving force provided by the drive unit is insufficient to overcome the resistance, the drum 21' cannot cross the raised obstacle 91, and the robot is blocked by the raised obstacle 91 on the ground 9, unable to complete the cleaning.

[0045] In the embodiments of this application, please refer to Figures 1 to 13 As shown, the obstacle-crossing portion 22 is arranged on the outer periphery of the drum 21; thereby, the radial size of the obstacle-crossing portion 22 becomes larger after it is combined with the drum 21. When encountering a raised obstacle 91 on the ground 9, the top 22a of the obstacle-crossing portion 22 can first contact the raised obstacle 91 and thus be supported on the raised obstacle 91; the angle between the line connecting the supporting points of the drum 21 and the raised obstacle 91 on the ground 9 and the axis of the drum 21 and the vertical direction is a, and at this time, the axial distance between the obstacle-crossing portion 22 and the drum 21 is the sum of the height M of the obstacle-crossing portion 22 and the radius R of the drum 21. When the height H of the raised obstacle 91 remains unchanged, the smaller the sum of the height M of the obstacle-crossing portion 22 and the radius R of the drum 21, the larger the angle a, and the greater the resistance of the drum 21 to rotating to cross the raised obstacle 91. On the premise that the driving force provided by the driving unit 4 and the height H of the raised obstacle 91 are both constant, there is a maximum angle a that can be crossed, and the height H remains unchanged. Then, the sum of the height M of the obstacle crossing portion 22 and the radius R of the roller 21 is a constant. Therefore, if M is 0, the radius R of the roller 21 is the maximum value, which is equivalent to, under the premise of the same driving unit 4, crossing the raised obstacle 91 of the same height, the greater the height M of the obstacle crossing portion 22, the smaller the required radius R of the roller 21. Therefore, the obstacle crossing portion 22 can effectively reduce the diameter of the roller 21 of the present application without affecting the obstacle crossing capability.

[0046] The smaller the radius R of the drum 21, the longer the fluff layer 3 on the drum 21 can be designed. The radial height of the fluff layer 3 is greater than the radial height of the obstacle crossing portion 22, that is, the distance from the top of the fluff layer 3 to the drum 21 should be greater than the height M from the top 22a of the obstacle crossing portion 22 to the outer periphery of the drum 21, to prevent the top 22a of the obstacle crossing portion 22 from contacting the ground before the fluff layer 3, and to ensure that the fluff layer 3 can run at high speed to wipe the floor. The longer the length of the fluff layer 3, the faster the linear speed of the end of the fluff layer 3 away from the drum 21 at the same angular velocity, which is conducive to the fluff layer 3 running at high speed to wipe the floor outside the accommodating chamber 11, and to throw out dirty and dirty water in the accommodating chamber 11 through the centrifugal principle, without the need to squeeze out the dirty and dirty water. The fluff layer 3 is always in a fluffy state and has a strong cleaning ability.

[0047] Finally, the diameter of the roller 21 of the roller brush device 400 of the embodiment of the present application can be effectively reduced without affecting the obstacle crossing ability and ensuring that the fluff layer 3 on the roller 21 can be designed to be longer. The fluff layer 3 can be in a fluffy state for a long time and has a strong cleaning ability, which can take into account the cleaning ability and obstacle crossing ability of the robot.

[0048] It should be noted that the overall size of the robot itself is limited, so the design size of the accommodating cavity 11 of the roller brush device 400 is usually certain. The larger the diameter of the roller 21, the smaller the length of the fluff layer 3 that can be designed, that is, the length of the fluff layer 3 plus the diameter of the roller 21 should not exceed the design size of the accommodating cavity 11; therefore, the length of the fluff layer 3 will not be unlimitedly extended on a larger roller 21, but the diameter R of the roller 21 can only be reduced as much as possible when the total value is fixed, so that enough space can be obtained to increase the length of the fluff layer 3 that can be designed, and ultimately ensure the cleaning effect; on this basis, in order to ensure the obstacle crossing ability, an obstacle crossing portion 22 is provided on the periphery of the roller 21 to improve the obstacle crossing ability.

[0049] In various embodiments of the present application, the top end 22 a of the obstacle-crossing portion 22 is an end away from the outer circumference of the drum 21 , and the bottom end 22 b of the obstacle-crossing portion 22 is an end close to the outer circumference of the drum 21 .

[0050] exist Figures 1 to 4 In the non-limiting embodiment shown, there is one sewage outlet 17, which is arranged in the middle of the cavity wall of the accommodating cavity 11; in some other non-limiting embodiments, there can also be multiple sewage outlets 17, which are evenly distributed axially on the cavity wall of the accommodating cavity 11, so that the dirty sewage thrown out by the fluff layer 3 can quickly flow to the sewage outlet 17.

[0051] exist Figures 1 to 13In the non-limiting embodiment shown, the obstacle crossing portion 22 is integrally connected to the roller 21, and the roller 21 can be cast using a high-strength plastic mold in one go, which has a simple structure and process, low cost, and good connection strength between the obstacle crossing portion 22 and the roller 21.

[0052] In some other non-limiting embodiments, the obstacle-crossing portion 22 and the roller 21 are detachably connected, and the connection method may be a snap connection or a screw connection.

[0053] In one embodiment, Figures 1 to 6 as well as Figure 13 As shown, the obstacle-crossing portion 22 is a convex rib arranged spirally around the circumference of the drum 21. After the obstacle-crossing portion 22 is coupled to the drum 21, its radial dimension increases, from its original diameter D1 to D1+2*M1. The angle a between the line connecting the drum 21's support point and the drum's axis and the vertical direction is 0.5*D1+M1. At this point, the axial distance between the obstacle-crossing portion 22 and the drum 21 is 0.5*D1+M1. Assuming the height H of the raised obstacle 91 remains unchanged, the smaller the axial distance between the obstacle-crossing portion 22 and the drum 21, the larger the angle a, and the greater the resistance to the drum 21's rotation to overcome the raised obstacle 91. Given the same drive unit 4, the greater the height M1 of the obstacle-crossing portion 22, the smaller the required drum diameter D1 to overcome a raised obstacle 91 of the same height. Therefore, the obstacle-crossing portion 22 can effectively reduce the diameter of the drum 21 of the present application without compromising obstacle-crossing capability.

[0054] In one embodiment, Figures 1 to 4 、 Figure 7 、 Figure 8 as well as Figure 13 As shown, the obstacle-crossing portion 22 comprises at least two ribs arranged spirally around the circumference of the drum 21. After the obstacle-crossing portion 22 is coupled to the drum 21, its radial dimension increases, from its original diameter D2 to D2 + M2 + M3. The angle a formed between the line connecting the drum 21's support point and the drum's axis and the vertical direction is 0.5*(D2 + M2 + M3). Given a constant height H of the raised obstacle 91, the smaller the distance between the obstacle-crossing portion 22 and the drum 21, the larger the angle a, and the greater the resistance to the drum 21's rotation over the raised obstacle 91. Given the same drive unit 4, the greater the heights M2 and M3 of the obstacle-crossing portion 22, the smaller the required drum diameter D2. Therefore, the obstacle-crossing portion 22 can effectively reduce the diameter of the drum 21 without compromising its obstacle-crossing capability.

[0055] In some non-limiting embodiments, the plurality of obstacle crossing portions 22 may all be arranged in a counterclockwise spiral around the circumference of the drum 21; in some non-limiting embodiments, the plurality of obstacle crossing portions 22 may all be arranged in a clockwise spiral around the circumference of the drum 21; in some non-limiting embodiments, part of the plurality of obstacle crossing portions 22 may be arranged in a counterclockwise spiral around the circumference of the drum 21, and another part of the plurality of obstacle crossing portions 22 may be arranged in a clockwise spiral around the circumference of the drum 21, and the two may intersect on the outer circumference of the drum 21 to form a mesh.

[0056] In one embodiment, Figures 1 to 4 、 Figure 9 、 Figure 10 as well as Figure 13 As shown, obstacle-crossing portion 22 is a circular ring arranged around the outer circumference of drum 21. After obstacle-crossing portion 22 is combined with drum 21, its radial dimension increases, from the original diameter D3 to D4. The angle between the line connecting the support point of drum 21 and the axis of drum 21 and the vertical direction is a. At this time, the axial distance between obstacle-crossing portion 22 and drum 21 is 0.5*D4. If the height H of raised obstacle 91 remains unchanged, the smaller the axial distance between obstacle-crossing portion 22 and drum 21, the larger the angle a, and the greater the resistance to the rotation of drum 21 to overcome raised obstacle 91. Under the premise of the same drive unit 4, the greater the height 0.5*(D4-D3) of obstacle-crossing portion 22, the smaller the required drum diameter D3 to overcome raised obstacle 91 of the same height. Therefore, obstacle-crossing portion 22 can effectively reduce the diameter of the drum 21 of the present application without affecting the obstacle-crossing capability.

[0057] In one embodiment, Figures 1 to 4 、 Figure 11 、 Figure 12 as well as Figure 13 As shown, obstacle-crossing portion 22 is an arc segment arranged around the outer circumference of drum 21. After being coupled to drum 21, obstacle-crossing portion 22 increases in radial dimension, changing from its original diameter D5 to D5+2*M4. The angle a formed between the line connecting the support point of drum 21 and the axis of drum 21 and the vertical direction is 0.5*D5+M4. At this point, the axial distance between obstacle-crossing portion 22 and drum 21 is 0.5*D5+M4. With the height H of raised obstacle 91 unchanged, the smaller the axial distance between obstacle-crossing portion 22 and drum 21 and the larger the angle a, the greater the resistance to the rotation of drum 21 to overcome raised obstacle 91. Under the premise of the same drive unit 4, the greater the height M4 of obstacle-crossing portion 22, the smaller the required drum diameter D5 to overcome raised obstacle 91 of the same height. Therefore, obstacle-crossing portion 22 can effectively reduce the diameter of the drum 21 of the present application without affecting the obstacle-crossing capability.

[0058] In some non-limiting embodiments, the diameter of the drum 21 is uniform throughout the axial direction, and the heights of the multiple obstacle-crossing portions 22 are uniform, facilitating structural design. In other non-limiting embodiments, the diameter of the drum 21 can be narrower at both ends and wider in the middle, and the heights of the obstacle-crossing portions 22 can be adjusted accordingly. For example, the front half of the drum 21 can be wound with a clockwise spiral obstacle-crossing portion 22 of height M5, the middle portion of the drum 21 can be wound with a counterclockwise spiral obstacle-crossing portion 22 of height M6, and the rear half of the drum 21 can be wound with a clockwise spiral obstacle-crossing portion 22 of height M5, with M5 being greater than M6. Of course, the obstacle-crossing portion 22 can also be a ring or an arc segment. This allows for flexible cleaning and obstacle-crossing according to different conditions on the floor 9.

[0059] In one embodiment, Figures 1 to 13 As shown, the radial height of the obstacle-crossing portion 22 is greater than or equal to one-third of the radius of the drum 21 , ensuring that the obstacle-crossing portion 22 has sufficient height to achieve a good obstacle-crossing effect.

[0060] In one embodiment, Figures 1 to 13 As shown, the roller brush device 400 includes stiff bristles 6, which are disposed on the top 22a of the obstacle-crossing portion 22, facing away from the roller 21. Specifically, the stiff bristles 6 can be in multiple bundles, spaced apart and distributed at the top 22a of the obstacle-crossing portion 22, facing away from the roller 21. The top 22a can be pre-defined with embedded holes 221, and the stiff bristles 6 can be embedded in the embedded holes 221, and can be connected by snapping, gluing, or screws.

[0061] The hard bristles 6 can be bristles, which are not absorbent. When the robot cleans a carpet or other working environment, the pile layer 3 wipes the floor at high speed, and the hard bristles 6 can better absorb impurities and long hair on the carpet.

[0062] Depending on the structural design of the obstacle-crossing portion 22, the bristles 6 may be arranged in different positions at the top 22a of the obstacle-crossing portion 22. For example, if the obstacle-crossing portion 22 is a circumferentially spirally arranged rib, the bristles 6 may be arranged in a spiral pattern, which can achieve a good cleaning effect. However, the actual arrangement of the bristles 6 is not limited to this. Depending on actual needs, the bristles 6 may also be arranged in a sinusoidal or triangular waveform pattern.

[0063] In one embodiment, Figures 1 to 13 As shown, the roller brush device 400 includes a receiving tube 12, a connecting rod 13, and a fixing block 14. The fixing block 14 is used to fix to the chassis 100 (mentioned below) of the robot. The bottom of the fixing block 14 is provided with a plurality of positioning holes 141, and the fixing method can be bolt connection. The side wall of the receiving tube 12 is opened to form a receiving cavity 11. The two ends of the connecting rod 13 are hinged to the fixing block 14 and the receiving tube 12 respectively. Figure 3 ,as well as Figure 13In the non-limiting embodiment shown, the roller 21 is supported on the raised obstacle 91 on the ground 9 by the obstacle-crossing portion 22, and the fixed block 14 remains fixed on the chassis 100 of the robot. The roller 21 drives the accommodating cylinder 12 to shift upward as a whole, and one end of the connecting rod 13 rotates clockwise around the hinge with the accommodating cylinder 12 at a certain angle, and the other end of the connecting rod 13 rotates counterclockwise around the hinge with the fixed block 14 at a certain angle, thereby ensuring that the chassis 100 does not move vertically relative to the ground, and the driving wheel 300 is always in contact with the ground 9 to provide forward power to the robot.

[0064] In one embodiment, Figures 1 to 4 As shown, the roller brush device 400 includes a scraper strip 7, which is arranged on the edge of the side wall opening of the accommodating cylinder 12 close to the ground 9. The scraper strip 7 can be made of rubber and has good elasticity. Figure 2 ,as well as Figure 13 In the non-limiting embodiment shown, the drive unit 4 drives the roller 21 to rotate counterclockwise in the robot's forward direction. Driven by the roller 21, the fluff layer 3 continuously moves counterclockwise against the ground 9 at high speed, thereby achieving high-speed floor mopping. After the fluff layer 3 cleans the ground, dirty water is thrown out by the centrifugal principle. Most of the dirty water is collected at the sewage outlet 17, and a small amount of dirty water may be thrown onto the ground 9. The scraper bar 7 is in close contact with the ground 9. As the robot moves forward, the scraper bar 7 drives the dirty water accumulated on the ground 9 to move forward together and eventually be extracted from the sewage outlet 17, preventing the dirty water from remaining on the ground 9. When the roller brush device 400 passes over the raised obstacle 91 on the ground 9, the roller 21 is supported on the raised obstacle on the ground 9 by the obstacle-crossing portion 22, raising the height of the scraper bar 7, thereby preventing the scraper bar 7 from interfering with the raised obstacle 91 and ensuring reliable movement of the robot in the forward direction. In each embodiment, along the rotation direction of the drum 21, the water supply device 5 is arranged on the rear side of the sewage outlet 17, that is, after the fluff layer 3 cleans the floor, the dirty sewage is first thrown out by the centrifugal principle, and the dirty sewage is collected at the sewage outlet 17 for discharge, and then the fluff layer 3 moves to the area corresponding to the water supply device 5 to drip the cleaning agent into the fluff layer 3, so as to prepare for the next cycle of cleaning the floor by the fluff layer 3.

[0065] In such Figures 1 to 4 In the non-limiting embodiment shown, the edge of the opening of the accommodating chamber 11 can be provided with a baffle 16 extending axially, and the baffle 16 abuts against the outer peripheral side of the fluff layer 3. A relatively sealed space is formed by the baffle 16, the inner wall of the accommodating cylinder 12, and the scraper 7. After the fluff layer 3 cleans the ground, the dirty and sewage is thrown out by the centrifugal principle and collected in the space, which can effectively prevent splashing.

[0066] In one embodiment, Figures 1 to 4 ,as well as Figure 13As shown, the water supply device 5 includes at least one water injection nozzle 51 and a water dripping hole 52. The water injection nozzle 51 is arranged on the side wall of the accommodating tube 12, and the water dripping holes 52 are distributed on the inner wall surface of the accommodating tube 12 near the fluff layer 3 and are connected to the water injection nozzle 51. The water injection nozzle 51 is connected to the water tank via a hose. The water tank stores a cleaning agent, which can be an oil detergent, clean water, or a mixture thereof. The cleaning agent in the water tank is fed into the water injection nozzle 51 by a metered pump or by gravity, and then flows into the accommodating chamber 11 through the water dripping hole 52. The fluff layer 3 reabsorbs the clean cleaning agent and rotates out of the accommodating chamber 11 again to clean the floor 9.

[0067] In such Figures 1 to 4 In the non-limiting embodiment shown, the water supply device 5 includes a plurality of drip holes 52, and the plurality of drip holes 52 form at least one row of drip groups along the axial direction, and each drip group is respectively aligned with the fluff layer 3 on the drum 21, so that the detergent absorbed by the fluff layer 3 along the axial direction is uniform, and there will be no situation where too much detergent is applied to some areas of the fluff layer 3 and too little detergent is applied to other areas of the fluff layer 3, thereby ensuring a stable cleaning effect of the roller brush device 400 on the ground 9.

[0068] In one embodiment, Figures 1 to 13 As shown, the robot can be a floor scrubber. The robot includes a chassis 100, universal wheels 200, and drive wheels 300. The drive wheels 300 are arranged on both sides of the chassis 100. The negative pressure unit and water tank are both arranged on the chassis 100. Along the robot's forward direction, the roller brush device 400 is arranged in front of the universal wheel 100 so that the center of gravity of the robot is located in the area between the drive wheel 300 and the universal wheel 100. This prevents the roller brush device 400, which cannot bear weight, from being damaged by the excessive weight of the robot. The roller brush device 400 contacts the raised obstacle 91 on the ground 9 before the universal wheel 100. The roller brush device 400 can ensure the robot's forward movement and floor cleaning by its good obstacle-crossing ability and good cleaning ability.

[0069] The various embodiments / implementations provided in this application can be combined with each other without causing any contradiction.

[0070] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A roller brush device, characterized in that: include an accommodating chamber (11); A roller (21) is rotatably disposed in the accommodating chamber (11); an obstacle crossing portion (22) provided on the outer periphery of the drum (21); A fluff layer (3) is provided on the outer periphery of the drum (21); a driving unit (4), wherein the driving unit (4) is capable of driving the drum (21) to rotate so as to drive the pile layer (3); and a water supply device (5) for supplying a cleaning agent to the fluff layer (3); The roller (21) is supported on a raised obstacle on the ground by the obstacle-crossing portion (22) to raise the height of the roller brush device.

2. The roller brush device according to claim 1, characterized in that: The obstacle-crossing portion (22) is a convex rib arranged in a circumferential spiral around the roller (21); And / or, the obstacle-crossing portion (22) is a ring arranged around the outer circumference of the drum (21); And / or, the obstacle-crossing portion (22) is an arc segment arranged around the outer circumference of the drum (21).

3. The roller brush device according to claim 1, characterized in that: The height of the obstacle-crossing portion (22) in the radial direction is greater than or equal to one third of the radius of the roller (21); And / or, the height of the fluff layer (3) in the radial direction is greater than the height of the obstacle crossing portion (22) in the radial direction.

4. The roller brush device according to claim 1, characterized in that: The obstacle crossing portion (22) is detachably connected to the roller (21); Alternatively, the obstacle crossing portion (22) is integrally connected to the roller (21).

5. The roller brush device according to any one of claims 1 to 4, characterized in that: The roller brush device comprises hard bristles (6), and the hard bristles (6) are arranged at the top end of the obstacle crossing portion (22) away from the roller (21).

6. The roller brush device according to any one of claims 1 to 4, characterized in that: The fluff layer (3) is bonded to the outer periphery of the drum (21).

7. The roller brush device according to any one of claims 1 to 4, characterized in that: The roller brush device comprises a receiving tube (12), a connecting rod (13) and a fixed block (14); the side wall of the receiving tube (12) is opened to form the receiving cavity (11); and the two ends of the connecting rod (13) are hinged to the fixed block (14) and the receiving tube (12) respectively.

8. The roller brush device according to claim 7, characterized in that: The rolling brush device comprises a scraping strip (7), and the scraping strip (7) is arranged on an edge of a side wall opening of the accommodating cylinder (12) close to the ground.

9. The roller brush device according to claim 7, characterized in that: The water supply device (5) comprises at least one water injection nozzle (51) and a water dripping hole (52), wherein the water injection nozzle (51) is arranged on the side wall of the accommodating cylinder (12), and the water dripping hole (52) is distributed on the inner side wall surface of the accommodating cylinder (12) close to the fluff layer (3) and is connected to the water injection nozzle (51).

10. A robot, characterized in that: It comprises a negative pressure unit, a water tank, and a roller brush device (400) according to any one of claims 1 to 9; at least one sewage outlet (17) is provided on the wall of the accommodating cavity (11); The negative pressure unit is in communication with the sewage outlet (17), and the water tank is in communication with the water supply device (5).

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