Water washing cleaning device

Abstract

The application discloses a kind of water washing cleaning device, including main frame, brush disc module, water suction module, water spraying module and drive module, the main frame is set apart from ground a certain distance, the drive module and brush disc module are set below main frame.The brush disc module is rotated and revolves by the drive module, to clean ground.The brush disc module includes curved side triangle brush disc and hollow suction pipe shaft, the hollow suction pipe shaft is straight rod shaft, and its suction end is communicated with the orifice of the curved side triangle brush disc, and the outlet end of the hollow suction pipe shaft is communicated with the water suction module.The water washing cleaning device of the application can recycle sewage during cleaning process, avoid using other tools, save time cost and economic cost.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, and more specifically to a water-washing cleaning device. Background Technology

[0002] With the development of science and technology and the continuous improvement of people's living standards, a wide variety of intelligent cleaning products have emerged on the market. Currently, the most effective water-washing cleaning product is the floor scrubber, which integrates water spraying, scrubbing, and wastewater recycling. These are commonly found in public places such as shopping malls, hospitals, and train stations. For floor scrubbers used in small spaces, the domestic invention patent with publication number CN105286732 possesses the aforementioned functions; it is flexible in operation, compact in structure, and has low power consumption. However, because floor scrubbers generally use circular brushes, they have a functional shortcoming: they cannot clean "dead corners" on walls.

[0003] To address the problem of cleaning "dead corners" in walls, researchers have applied the "Reuleaux Triangle," characterized by its near-square motion trajectory, to cleaning mechanisms. PCT international patent publication WO 2022 / 129851A1 discloses a handheld cleaning device with a Reuleaux triangular brush. Although the triangular shape has been modified, it lacks a water-washing module, requiring repeated washing or replacement of the brush, limiting its use to dry cleaning. Japanese invention patent publication JP2014079512A discloses a robotic vacuum cleaner with Reuleaux triangular side brushes. However, this robot's side brushes only have three brush strips, which extend excessively beyond the Reuleaux triangle, resulting in weak rigidity. Furthermore, lacking a water-washing module, its cleaning performance is poor. Chinese invention patent publication CN 107788900A discloses a cleaning device that, while incorporating Reuleaux triangular units, lacks a water-washing module and can only be used for dry cleaning. Chinese invention patent CN106535729A and US invention patent US 11224323B2 disclose an autonomous walking vacuum cleaner (robot vacuum cleaner). The robot vacuum cleaner is designed in the shape of a Leroy triangle, with side brushes at the two apex positions. By rotating a certain angle, the robot vacuum cleaner can align the apex with the corners to clean the hard-to-reach areas, thus cleaning the corners of the walls. However, due to the limited turning radius of the machine, the robot vacuum cleaner suffers from "corner binding" obstacles during autonomous path planning, which requires the robot vacuum cleaner to repeatedly adjust its posture, resulting in extremely low cleaning efficiency of the hard-to-reach areas in one go. In addition, during the posture adjustment process of the irregularly shaped robot vacuum cleaner, the triangular tip constantly hits the wall, resulting in excessive noise.

[0004] Therefore, traditional Reilly triangle cleaning components have two major problems: First, the center of the traditional Reilly triangle is set as a transmission mechanism, making it impossible to install a suction channel and lacking a water-washing cleaning function; second, the traditional Reilly triangle relies solely on its rotation around its geometric center and its eccentric revolution around a fixed axis, resulting in an actual running trajectory that resembles a square drum shape as shown in Figure 1 (see https: / / www.doc88.com / p-2965984600072.html), which cannot accurately clean along the edges. To solve the trajectory overflow problem, Chinese patent CN 205625816U sets a square limiting frame outside the Reilly triangle, driven by a universal joint coupling, which can achieve precise edge cleaning. However, it also has shortcomings: on the one hand, the introduction of the universal joint coupling will cause speed fluctuations and complex structure; on the other hand, the friction between the side brush and the square limiting frame during the cleaning process will cause power loss and component wear.

[0005] Furthermore, existing cleaning devices often use cloths, which cannot provide sufficient pressure, resulting in poor cleaning effectiveness. Moreover, if the cloths are not cleaned or replaced promptly after becoming soiled, secondary contamination can easily occur. Changing and washing cloths is also inconvenient and costly. Therefore, existing cleaning devices cannot meet the deep cleaning needs of public places such as shopping malls, hospitals, and train stations, as well as offices and homes, for cleaning "dead corners" in walls. The same problem exists when using power tools to "wash" the corners of glass curtain walls during building facade cleaning. Summary of the Invention

[0006] The purpose of this invention is to provide a water washing and cleaning device that can cover dead corners for cleaning and integrate the washing wastewater recycling.

[0007] The basic concept of this invention is to incorporate a water-absorbing module, combining the brush plate module and the water-absorbing module. An orifice (suction port) is provided on the surface of the brush plate (e.g., at its geometric center), with a very small distance between the orifice and the ground, allowing for wastewater and waste collection with only a low-power impeller. A hollow suction tube shaft connects the brush plate and the water-absorbing module, providing a wastewater collection function.

[0008] Therefore, one embodiment of the present invention provides a water-washing cleaning device, comprising a main frame, a brush plate module, a water absorption module, a water spraying module, and a drive module. The main frame is disposed at a certain distance from the ground, and the drive module and the brush plate module are disposed below the main frame. The brush plate module rotates and revolves via the drive module to clean the ground.

[0009] The brush plate module includes a curved triangular brush plate and a hollow straw shaft. The hollow straw shaft is a straight shaft, and its suction port end is connected to the opening of the curved triangular brush plate, and its outlet end is connected to the water absorption module.

[0010] In one or more embodiments, the water suction module includes a wastewater collection tank, a water suction impeller, an impeller motor mounting bracket, and an impeller motor. The wastewater collection tank is positioned above the main frame and has a flange that is bolted to the main frame. The flange has a groove for holding the water suction impeller. The impeller motor mounting bracket is located above the wastewater collection tank to support the water suction impeller. A drain outlet is located below the wastewater collection tank, and the outlet end of the hollow suction tube shaft passes through the main frame and is directly connected to the wastewater collection tank.

[0011] In one or more embodiments, the water absorption module may further include an impeller motor cover plate. The impeller motor cover plate is fixed to the impeller motor mounting bracket and is provided with a slot and mounting holes for placing the impeller motor.

[0012] In one or more embodiments, the brush plate module includes a curved triangular brush plate, a planetary reversing gear, planetary gears, a sun gear, a bearing retaining ring, a brush plate drive gear bearing, a brush plate drive gear, a brush plate shaft bearing, a reversing gear shaft, a brush plate shaft, a hollow suction tube shaft, and a chassis. The sun gear, brush plate drive gear, planetary reversing gear, and reversing gear shaft form a planetary gear train. A brush plate connecting frame is connected to one side of the cleaning surface of the curved triangular brush plate. This brush plate connecting frame can be three-spoke or multi-spoke. The three spokes can be fixed to one side of the cleaning surface of the curved triangular brush plate by means of screw connection or riveting connection, or it can be integrally formed by additive manufacturing. The brush plate connecting frame is fixed to the brush plate shaft, and the brush plate shaft drives the curved triangular brush plate to rotate through the brush plate connecting frame.

[0013] The hollow straw shaft is a hollow stepped shaft with a fixed shoulder at the outlet end near the main frame. Four threaded holes are located on the shoulder end face, securing the hollow straw shaft to the main frame via threaded connections. Near the suction port end of the curved triangular brush disk, the hollow straw shaft has a three-stepped shaft with decreasing outer diameter. The outer surface of the first-stepped shaft is interference-fitted with the inner ring of the brush disk drive gear bearing, allowing the brush disk drive gear to rotate freely around its axis. The second-stepped shaft connects to and fixes the sun gear, preventing free rotation. This second-stepped shaft can be, for example, a D-shaped shaft, connected to the sun gear via a D-shaped hole to prevent free rotation. The brush disk drive gear spokes have reversing gear shaft holes and brush disk shaft holes on their circumferences, used to position the reversing gear shaft and brush disk shaft respectively. The reversing gear shaft and brush disk shaft are connected to planetary reversing gears and planetary gears, respectively.

[0014] When the brush drive gear rotates, the brush shaft drives the curved triangular brush disk to revolve around the center of the brush drive gear. When the brush drive gear rotates, it drives the reversing gear shaft to rotate around the center of the brush drive gear. The planetary reversing gear meshes with the sun gear, causing the planetary reversing gear to rotate around its geometric center. The planetary reversing gear meshes with the planetary gear, causing the brush shaft to rotate, which in turn drives the curved triangular brush disk to rotate around its geometric center.

[0015] When the water-washing cleaning device is working, the drive motor drives the brush drive gear to rotate through the motor gear and transmission gear. The brush drive gear has multiple internal holes on its spokes to fix the reversing gear shaft and the brush shaft. A planetary reversing gear is connected to the end of the reversing gear shaft near the curved triangular brush disk. The brush shaft and the planetary gear are interference-fitted, preventing them from rotating relative to each other. As the reversing gear shaft revolves around the brush drive gear, the planetary reversing gear achieves a constant-speed rotation by meshing with a fixed sun gear. This rotation is then transmitted at a constant speed to the curved triangular brush disk through meshing with the planetary gear. The brush shaft, connected to the brush drive gear spokes, drives the curved triangular brush disk to revolve around the sun gear. The rotation and revolution of the curved triangular brush disk combine to create an eccentric planetary motion, causing the brush disk edge to follow an approximately square trajectory. Simultaneously, the spray module sprays cleaning liquid onto the surface to be cleaned, and the suction module collects wastewater through the suction channel of the hollow suction tube shaft, achieving thorough water washing within the square area.

[0016] In one or more embodiments, the curved triangular brush disc includes a curved edge, brush strips, brush plates or bristles, and an orifice. The orifice can be circular. The cleaning surface of the brush disc is provided with concentrically rotating brush strips or brush plates, each of which has a certain gap as a wastewater guiding channel. The brush strips or brush plates can be arranged slightly beyond the outer edge of the curved edge to increase the actual coverage area of ​​the curved triangular brush disc. The brush strip material can be rubber or other materials with a high coefficient of friction. The bristles, arranged in clusters or sheets, are discretely distributed between the concentrically rotating brush plates or brush strips, and can be made of nylon or PBT filaments with good wear resistance and resilience. When the curved triangular brush disc rotates for cleaning, the brush strips (or brush plates) and bristles rotate concentrically. The clustered or sheet-like bristles scrub the ground, while the intermittently arranged sheet-like brush strips collect and gather wastewater to the central area of ​​the curved triangular brush disc by scraping the surface to be cleaned, where it is then recycled by the water absorption module. The curved triangular brush disc has an opening in the center, which facilitates the passage of the hollow suction tube shaft while reducing the distance between the suction port and the ground, thus reducing the impeller motor power required for wastewater recycling.

[0017] In one or more embodiments, the geometric shape of the curved edge of the curved triangular brush disk is obtained through dynamic rotation and cutting. First, a square with side length 'a' is set in the design software, and its circumcircle is drawn. Then, the center of the circumcircle is horizontally offset to the right by a certain distance. Next, the circumcircle is given a rotational motion around its offset center and a revolution motion around the geometric center of the square. During this process, the arc exposed outside the square is cut off every time the circumcircle revolves by a certain angle. This operation is repeated until all the arcs exposed outside the square are cut off. Preferably, the cusps of the arcs can be rounded after cutting. The remaining curve inside the square is the geometric shape of the curved edge of the curved triangular brush disk. The certain angle can be between 3 and 15 degrees.

[0018] In one or more embodiments, the ratio of the number of teeth of the sun gear to the number of teeth of the planetary gear is 4:3. At this time, the ratio of the angular velocity of the curvilinear triangular brush disk rotating about its geometric center to the angular velocity of its revolution around the center of the brush disk drive gear is 1:3, which can ensure that the area covered by the planetary motion of the curvilinear triangular brush disk is square.

[0019] In one or more embodiments, the drive module includes a drive motor and a motor gear. The drive motor can be bolted to the upper side of the main frame, and the motor output shaft passes vertically through the main frame and connects to the drive gear located on the lower side of the main frame. The drive gear directly meshes with the brush disk drive gear or meshes with the brush disk drive gear through a transmission gear. When two or more brush disk modules are provided, the drive module also includes a transmission reversing gear. The two or more brush disk modules are arranged on the left and right sides, and the transmission reversing gear is used to change the direction of rotation of the curved triangular brush disk on one side, so that the curved triangular brush disks on both sides rotate in opposite directions, thus counteracting the radial force.

[0020] In one or more embodiments, the water spraying module includes a water pump (or water valve), a clean water tank, and a spray nozzle. The water spraying module is equipped with an infrared sensor or a Hall sensor to detect the position of the curved triangular brush disc, preventing cleaning fluid from spraying onto the non-cleaning surface of the curved triangular brush disc and causing water erosion. The sensor is located next to the spray nozzle on the main frame. When the cleaning device is turned on, the infrared or Hall sensor first detects whether the curved triangular brush disc is currently blocking the spray nozzle. If the curved triangular brush disc is not blocking the spray nozzle, water spraying is initiated; if the curved triangular brush disc is blocking the spray nozzle, water spraying is delayed to ensure that the curved triangular brush disc does not block the spray nozzle.

[0021] The aforementioned water-washing cleaning device can be configured with one, two, or four brush plate modules depending on the usage environment. It can be driven by a single drive motor with multiple transmission gears, or each brush plate module can be driven by a separate motor. When using two or more brush plate modules, a reversing gear should be added to change the direction of the brush plate on one side to counteract radial force and achieve a symmetrical arrangement of the brush plates. For indoor home environments, two curved triangular brush plates can be independently installed, or two curved triangular brush plates can be combined with multiple traditional circular brush plates. The main frame should be a rectangle with a large length-to-width ratio, with the traditional circular brush plate in the middle and the two curved triangular brush plates on both sides. For indoor shopping malls or building facades, four curved triangular brush plates can be independently installed, or four curved triangular brush plates can be combined with a single traditional circular brush plate. The traditional circular brush plate is located at the center of the brush plate, and the four curved triangular brush plates are symmetrically arranged at the four vertices of the square main frame about the central plane of the main frame.

[0022] The drive module in the aforementioned water washing and cleaning device is characterized in that the drive module can adopt gear transmission, belt transmission, and chain transmission. The gear transmission has a compact structure and is suitable for indoor furniture scenarios; the belt transmission and chain transmission are lightweight and suitable for indoor supermarkets and building facade scenarios.

[0023] The beneficial effects of this invention are:

[0024] 1. Existing Reilly triangle rotating shafts have no other components and are only used for support and transmission. This invention utilizes the rotation center of the Reilly triangle to set an orifice (suction port), and through a rationally designed transmission mechanism, configures a suction channel. With the help of bristles and a centripetally rotating brush strip, it can achieve wastewater recovery from the center of the brush plate while washing, resulting in good cleaning effect and eliminating the need to replace the brush cloth.

[0025] 2. This invention proposes a water-washing cleaning device that, through a specially designed curved triangular brush disc and its planetary motion, can perform water-washing cleaning of a square area without dead angles, without the need for a square limiting device.

[0026] 3. In this invention, the suction port for collecting garbage and sewage can be set at the geometric center of the curved triangular brush disc. The brush blades or strips (or brush blades) and bristles arranged on the brush disc gather the garbage and sewage on the ground at the suction port. Currently, all cleaning brush discs have their rotation drive part set on the back of the brush disc (the opposite side of the cleaning surface). This invention breaks through this limitation. The brush disc connecting frame is set on the side of the cleaning surface, so that the hollow suction tube shaft can pass through the central hole of the brush disc, making the suction port closer to the cleaning surface and preventing it from colliding with the rotating brush disc connecting frame. The structure is compact and low, and only a small impeller motor is needed to achieve the suction of small particles of garbage and sewage.

[0027] 4. The brush plate module used in this invention has a simple structure, high transmission efficiency and motion stability, and low power consumption. It can be used not only in cleaning robots, but also in handheld mops. It is suitable for use in small areas of home such as living rooms and bedrooms, as well as floors of large shopping malls, and even for cleaning building facades. Attached Figure Description

[0028] Figures 1a-1b A schematic diagram of the Leylow triangle brush motion trajectory;

[0029] Figure 2 An exploded view of a water washing and cleaning apparatus according to an embodiment of the present invention;

[0030] Figure 3A and 3B A cross-sectional view of a water washing and cleaning apparatus according to an embodiment of the present invention;

[0031] Figure 4 This is a bottom view of a water washing and cleaning device according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram illustrating the principle of the driving module according to an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of a curved triangle cleaning a square region according to an embodiment of the present invention;

[0034] Figure 7 This is a partial cross-sectional view of the brush plate orifice according to an embodiment of the present invention;

[0035] Figure 8 A-8F is a schematic diagram of the brush body cutting and forming according to an embodiment of the present invention;

[0036] Figure 9 This is a curved triangular brush pattern according to an embodiment of the present invention;

[0037] Figure 10 This is a curved triangular brush pattern two according to an embodiment of the present invention;

[0038] Figure 11 This is one arrangement of the brush module according to an embodiment of the present invention;

[0039] Figure 12 This is a second arrangement of the brush module according to an embodiment of the present invention;

[0040] Figure 13 This is the third arrangement of the brush module according to an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 101-Curved triangular brush disc, 1011-Curved edge of brush disc, 1012-Brush blade or strip, 1013-Brush bristles, 1014-Orifice, 102-Planetary reversing gear, 103-Planetary gear, 104-Sun gear, 105-Bearing retaining ring, 106-Brush disc drive gear bearing, 107-Brush disc drive gear, 108-Brush disc shaft bearing, 109-Reversing gear shaft, 110-Brush disc shaft, 111-Hollow suction tube shaft 112-Chassis, 113-Brush plate connecting frame, 201-Sewage collection tank, 202-Suction impeller, 203-Impeller motor fixing frame, 204-Impeller motor, 205-Impeller motor cover plate, 206-Sewage chamber, 301-Drive motor, 302-Drive gear, 303-Transmission gear, 304-Transmission reversing gear, 305-Transmission gear shaft, 306-Main frame, 401-Water pump, 402-Clear water tank. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0044] This invention proposes a water-washing cleaning device, with reference to Figure 2 Figure 3 and Figure 4 As shown, the system mainly includes a brush plate module 100, a water suction module 200, a drive module 300, and a water spraying module 400. A main frame 306 is positioned at a certain distance from the ground. The water suction module 200, water spraying module 400, and drive motor 301 can be positioned above the main frame 306, while the drive module 300 and brush plate module 100 are positioned below the main frame 306. The brush plate module 100 rotates and revolves via the drive module 300 to clean the ground. The brush plate module 100 includes a curved triangular brush plate 101 and a hollow suction tube shaft 111. The hollow suction tube shaft 111 is a straight shaft, and its suction port end is connected to the orifice 1014 of the curved triangular brush plate 101.

[0045] See Figure 2As shown in Figure 3, in one embodiment, the water absorption module 200 includes a wastewater collection tank 201, a water absorption impeller 202, an impeller motor mounting bracket 203, an impeller motor 204, an impeller motor cover plate 205, and a wastewater chamber 206. The wastewater collection tank 201 is located above the main frame 306 and is conical in shape, narrower at the top and wider at the bottom. The wastewater collection tank 201 has a flange, which is bolted to the main frame 306. It has a groove in the middle to hold the water absorption impeller 202. Above the wastewater collection tank 201 is the impeller motor mounting bracket 203, which has a groove in the middle for mounting the water absorption impeller 202 and the impeller motor 204. In this embodiment, the impeller is a centrifugal impeller. Above the impeller is the impeller motor cover plate 205. The impeller motor cover plate 205 has a slot and mounting hole in the middle for placing the impeller motor 204. The impeller motor 204 has a small power output and is fixed to the impeller motor cover plate 205 via a flange at the bottom of the motor. A soft rubber pad can be placed between the impeller motor mounting bracket 203 and the sewage collection tank 201 for vibration reduction and noise reduction. A thin filter screen for water absorption can be placed above or below the impeller motor mounting bracket 203. The impeller motor cover plate 205 can be fixed to the impeller motor mounting bracket 203 by snap-fit. The sewage collection tank 201 has a sewage outlet at its lowest point, which is directly opposite the sewage inlet of the sewage chamber 206, or a pipe connects the sewage outlet to the sewage inlet of the sewage chamber 206.

[0046] The main function of the wastewater collection tank 201 is to separate water and air, allowing wastewater to be discharged centrally, while the airflow is discharged above or to the sides (above or below) of the wastewater collection tank 201. Openings can also be made on the main frame 306 and the curved triangular brush disc 101 to allow airflow to exit from the bottom. The discharged airflow carries a small amount of water vapor, which can be further filtered by a sponge-like filter at the air outlet on the casing. To prevent water droplets from splashing out and being carried away by the airflow when wastewater impacts the wastewater collection tank 201, a wire mesh splash guard can be installed on the tank wall facing the impeller airflow outlet. The tank wall cross-section can be set in an arc shape, allowing splashed water droplets to fly towards the center of the circle facing the airflow outlet; alternatively, the tank wall can be angled downwards. The tank wall can also be angled upwards, with multiple grooves to accommodate water droplets and prevent them from being carried upwards by the airflow. The wastewater collection tank 201 can be mounted on the main frame 306 or the top cover using a bracket. A portion near the impeller front cover can replace the impeller front cover, requiring the gap between it and the suction impeller 202 to be as small as possible without touching it. The suction port end of the hollow suction tube shaft 111 should be as close as possible to the surface to be cleaned to ensure that the impeller motor 204 drives the water suction impeller 202 to generate sufficient negative pressure to recover the sewage.

[0047] In one embodiment, the hollow straw shaft 111 is a hollow stepped shaft. A fixed shoulder is provided at the outlet end near the main frame 306, and four threaded holes are opened on the end face of the shoulder. The hollow straw shaft 111 is fixed to the main frame 306 via threaded connections. Near the suction port end of the curved triangular brush disk 101, the hollow straw shaft 111 has a three-step shaft with an outer diameter decreasing from large to small. The outer surface of the first step shaft is interference-fitted with the inner ring of the brush disk drive gear bearing 106, and the outer ring of the brush disk drive gear bearing 106 is interference-fitted with the brush disk drive gear 107, allowing the brush disk drive gear 107 to rotate freely around its axis. The second step shaft is a D-shaped shaft, which is fixed to the sun gear 104 by connecting to the D-shaped hole profile on the sun gear 104, preventing it from rotating freely. The circumference of the spokes of the brush disk drive gear 107 has a reversing gear shaft hole and a brush disk shaft hole, used to position the reversing gear shaft 109 and the brush disk shaft 110, respectively. The brush disc shaft 110 is fixedly connected to the base 112 near the brush disc, and the base 112 is connected to the curved triangular brush disc 101. The reversing gear shaft 109 and the brush disc shaft 110 are respectively connected to a planetary reversing gear 102 and a planetary gear 103. The brush disc shaft 110 and the planetary gear 103 are interference-fitted and cannot rotate relative to each other. When the brush disc drive gear 107 rotates, it causes the brush disc shaft 110 to drive the curved triangular brush disc 101 to revolve around the center of the brush disc drive gear 107; when the brush disc drive gear 107 rotates, it drives the reversing gear shaft 109 to rotate around the center of the brush disc drive gear 107. The planetary reversing gear 102 meshes externally with the sun gear 104, causing the planetary reversing gear 102 to rotate around its geometric center. The planetary reversing gear 102 meshes externally with the planetary gear 103, causing the brush disc shaft 110 to rotate, ultimately driving the curved triangular brush disc 101 to rotate around its geometric center.

[0048] In the curved triangular brush disk 101, the geometric shape of the curved edge 1011 is obtained through dynamic rotation and interception. Figure 8 The diagram illustrates the cutting and shaping of the curved triangular brush disk 101. First, a square with side length 'a' is set in the design software, and its circumcircle is drawn. Next, the center of the circumcircle is horizontally offset to the right by a certain distance. Then, the circumcircle is given a rotational motion around its offset center and a revolution motion around the geometric center of the square. During this process, every 10° revolution of the circumcircle (other angles are also acceptable), the arcs exposed outside the square are cut off. This operation is repeated until all the arcs exposed outside the square are cut off. After the cutting is completed, the cusps of the arcs can be rounded. The remaining curve inside the square is the geometric shape of the curved triangular brush disk curved edge 1011.

[0049] like Figure 2As shown, in one embodiment, the brush plate module 100 includes a curved triangular brush plate 101, a planetary reversing gear 102, a planetary gear 103, a sun gear 104, a bearing retaining ring 105, a brush plate drive gear bearing 106, a brush plate drive gear 107, a brush plate shaft bearing 108, a reversing gear shaft 109, a brush plate shaft 110, a hollow suction tube shaft 111, and a brush plate connecting frame 112. The sun gear 104, the brush plate drive gear 107, the planetary reversing gear 102, and the reversing gear shaft 109 form a planetary gear train. Figure 7 This is a partial cross-sectional view of the brush plate orifice 1014. A brush plate connecting frame 113 is connected to the curved triangular brush plate 101. The brush plate connecting frame 113 is three-spoke (or multi-spoke). The three spokes can be fixed to one side of the cleaning surface of the curved triangular brush plate 101 by means of screws or rivets, or they can be integrally formed by additive manufacturing. The spokes can be straight or spiral, and the rotation direction of the spiral is the same as the centripetal rotation direction of the brush plate.

[0050] The brush plate connecting bracket 113 is fixed to the brush plate shaft 110, and the brush plate shaft 110 drives the curved triangular brush plate 101 to rotate through the brush plate connecting bracket 113. Optionally, the three spokes are fixed to the cleaning surface side of the curved triangular brush plate 101 by washers, so that the distance between the spokes and the cleaning surface can be adjusted by adjusting the height of the washers, so that the spokes are as close to the cleaning surface as possible but do not contact the cleaning surface, thereby ensuring that the suction port is close to the cleaning surface and improving the water absorption efficiency.

[0051] The brush plate connecting frame 113 is spoke-shaped, designed to be as thin and light as possible while maintaining strength. This ensures that the spokes do not obstruct the orifice (suction port), allowing wastewater and small particles of debris to pass smoothly through the orifice 1014 of the curved triangular brush plate 101 and be sucked into the hollow suction tube shaft 111. Preferably, three spokes are chosen instead of more spokes because more spokes would divide the orifice 1014 of the curved triangular brush plate 101 into more areas, increasing the spoke density and hindering the suction of wastewater. Furthermore, three spokes offer greater stability than two spokes.

[0052] A hard filter screen that blocks larger particles can be installed at the orifice 1014 or at the bottom port of the hollow suction tube shaft 111 (close to the gap between two adjacent blades of the impeller to prevent the impeller pores from being blocked).

[0053] The top of the three spokes convex slightly downwards near the cleaning surface, forming an obtuse-angled cone surface, which facilitates the absorption of wastewater on the spokes and its flow to both sides. Waterproof rubber caps can be installed at the center of the three-spoke connecting frame and at the connection between the outer edge of the spokes and the brush disc. The brush disc connecting frame 113 has an opening 1014 in the middle (i.e., the brush disc connecting frame 113 is hollow). The three-spoke brush disc connecting frame 113 divides this circular opening into three "D"-shaped holes for connection with the brush disc shaft 110. Alternatively, set screws can be added to the side for connection, or the holes can be threaded to form a bayonet connection with the brush disc shaft 110. However, it must be ensured that the direction of the thread is opposite to the direction of rotation of the curved triangular brush disc 101 to prevent the curved triangular brush disc 101 from loosening or falling off due to rotational inertia during operation. The brush disc connecting frame 113 can also be integrally formed with the curved triangular brush disc 101 by additive manufacturing, as shown in the diagram. Figure 9 and 10 As shown.

[0054] When the water-washing cleaning device according to an embodiment of the present invention is in operation, the drive motor 301 drives the brush disk drive gear 107 to rotate through the motor gear 302 and the transmission gear 303. When the reversing gear shaft 109 revolves around the brush disk drive gear 107, the planetary reversing gear 102 achieves constant speed rotation by meshing with the fixed sun gear 104, and then transmits this rotation at the same speed to the curved triangular brush disk 101 by meshing with the planetary gear 103. The brush disk shaft 110 is connected to the spokes of the brush disk drive gear 107 to drive the curved triangular brush disk 101 to revolve around the sun gear 104. The rotation and revolution of the curved triangular brush disk 101 combine to form an eccentric planetary motion, making the edge of the brush disk have an approximately square motion trajectory. At the same time, the water spraying module 400 sprays cleaning liquid onto the surface to be cleaned, and the water suction module 200 recovers the wastewater through the suction channel of the hollow suction tube shaft 111 to achieve water-washing cleaning without dead corners within the square area.

[0055] like Figure 9 and Figure 10As shown, the curved triangular brush disk 101 includes a curved edge 1011 and an orifice 1014. At least one of brush blades, brush strips, and bristles is provided on the curved triangular brush disk 101. The cleaning surface of the brush disk is provided with centripetally arranged brush blades or brush strips 1012, with a certain gap between each brush blade or brush strip 1012 along each centripetal rotation line to serve as a wastewater guiding channel. The brush strips 1012 can be arranged slightly beyond the outer edge of the curved edge 1011 to increase the actual coverage area of ​​the curved triangular brush disk 101. The brush strip material can be selected from materials with a high coefficient of friction, such as rubber. The centripetally rotating brush blades or brush strips 1012 are arranged with discretely distributed brush blades or bristles in clusters or sheets. Nylon filaments or PBT filaments with good wear resistance and resilience can be selected. The orifice 1014 is opened in the center of the curved triangular brush disk 101 to facilitate the passage of the hollow suction tube shaft 111 while reducing the distance between the suction port and the ground, thus reducing the power required for the impeller motor 204 for wastewater recycling.

[0056] Reference Figure 9 The first type of brush disc features bristles 1013 arranged in clusters, with equal spacing between clusters 1013 along the same centripetal rotation line. Brush blades or strips 1012 are intermittently arranged between the bristles 1013 on different centripetal rotation lines. When the curved-edge triangular brush disc 101 rotates for cleaning, the brush blades or strips 1012 and bristles 1013 rotate centripetally. If the machine moves to the right, the rotation direction of the bristles, brush blades, or strips is preferably clockwise; if the machine moves to the left, the rotation direction of the bristles 1013, brush blades, or strips 1012 is preferably counterclockwise. This design allows debris to pass through the channels formed by the bristles 1013, brush blades, or strips 1012 and move along these channels to the suction port at the center of the brush disc.

[0057] Reference Figure 10In the second type of brush disc, the bristles 1013 and brush blades or strips 1012 on the cleaning surface of the curved triangular brush disc 101 are elongated strips with a constant width. Their length gradually increases outwards from the center of the curved triangular brush disc 101, rotating centripetally. The brush blades or strips 1012 are still distributed centripetally, but their curve shape changes to a straight-edged curve fitted with straight lines. The spacing between the straight edges is fixed, and the length of the straight edges gradually increases from the inside out. The spacing between the brush blades or strips 1012 guides the cleaning wastewater, allowing it to better converge at the central suction port of the curved triangular brush disc 101. The radius of rotation and movement speed are small in the area near the center of the curved triangular brush disc 101, therefore the cleaning effect near the center is not as good as the edge areas. The length of the tufted bristles 1013 in the central area can be appropriately increased to generate greater friction with the cleaning surface, thus producing a better cleaning effect. During the cleaning process, the bristles 1013 scrub the ground, and the intermittently arranged brush blades or strips 1012 collect and gather the wastewater to the center area of ​​the curved triangular brush disc 101 by scraping the surface to be cleaned, and then recycle it through the water absorption module 200.

[0058] Reference Figure 5 As shown, to ensure that the area covered by the planetary motion of the curved triangular brush disk 101 is square, the planetary reversing gear 102 needs to rotate 120° in the same direction when the brush disk drive gear 107 rotates one revolution. Then, the external meshing motion of the planetary reversing gear 102 and the planetary gear 103 transmits the motion to the brush disk shaft 110, driving the curved triangular brush disk 101 to move. That is, the ratio of the angular velocity of the curved triangular brush disk 101's rotation around its geometric center to its angular velocity around the center of the brush disk drive gear 107 is 1:-3 (the negative sign indicates that the rotation directions are opposite). The ratio of the rotational speed of the planetary reversing gear 102 to the rotational speed of the brush disk drive gear 107 is: ω 102 :ω 107 = 1:3. The brush drive gear 107 acts as the planet carrier H; the transmission ratio between the planetary reversing gear 102 and the sun gear 104 in the gear train can be expressed as:

[0059]

[0060] It is deduced that the tooth ratio between the sun gear 104 and the planetary reversing gear (102) must be 4:3. The number of teeth of the planetary gear 103 is the same as that of the planetary reversing gear 102.

[0061] The drive module 300 may include a drive motor 301, a motor gear 302, a transmission gear 303, a transmission reversing gear 304, a transmission gear shaft 305, and a main frame 306. The drive motor 301 is fixed to the upper side of the main frame 306 by bolts. The motor output shaft passes vertically through the main frame 306 and connects to the drive gear 302 located on the lower side of the main frame. The drive gear 302 can be fixed by means of key connection or other methods. The drive gear 302 meshes with the transmission gear 303 and the brush disc drive gear 110 in sequence; the gear ratio is set to z. 302 :z 303 :z 110 =23:23:103. This gear ratio was chosen because the motor speed is too high, while the curved triangular brush disk 101 of this invention does not require a high speed. The transmission gear 303, transmission reversing gear 304, etc., are fixed by the transmission gear shaft 305, and the fixing method is "key" connection, etc. The drive motor 301, drive gear 302, transmission gear 303, etc. are set on both sides of the main frame 306. On the one hand, this frees up more space for the water washing and cleaning device, making the structure more compact and miniaturized; on the other hand, since the surface of the water washing and cleaning device will come into contact with more sewage, it can prevent the drive motor 301 from being contaminated.

[0062] The transmission gear shaft 305 is a stepped shaft, which can rotate relative to the main frame 306. The transmission gear shaft 305 is provided with a shoulder for the positioning gear, and an integral baffle is provided at the lower end. The baffle has openings at corresponding positions and protrusions on the edges of the openings, allowing the transmission gear shaft 305 to pass through and fix the gear. In addition to gear transmission, the drive module 300 can also use belt transmission, chain transmission, worm gear, and other commonly used transmission methods. In particular, belt transmission and chain transmission can be used for linkage between multiple brush discs.

[0063] like Figure 3BAs shown, the sprinkler module 400 includes a water pump 401 (or water valve), a clean water tank 402, a waste water tank 403, and a sprinkler nozzle. The sprinkler module 400 is equipped with an infrared sensor or a Hall sensor to detect the position of the curved triangular brush disc 101, preventing cleaning fluid from spraying onto the non-cleaning surface of the curved triangular brush disc 101 and causing water erosion. The sensor is located next to the sprinkler nozzle on the main frame 306. The infrared sensor and the Hall sensor have the same function, but their detection accuracy and price differ. The infrared sensor has lower price and accuracy and is used in low- to mid-range products. The Hall sensor has higher price and accuracy and is suitable for high-end products. The sprinkler module 400 has at least one water outlet (sprayer head), located on the main frame 306 at the junction of the shadow swept by the curved triangular brush disc 101 and the blank area left by the curved triangular brush disc 101 during rotation. The infrared sensor or Hall sensor is located next to the sprinkler nozzle on the main frame 306, or directly on the side of the sprinkler nozzle. Both types of sensors are used to detect the position of the curved triangular brush disk 101 and determine whether to spray water or activate the curved triangular brush disk 101.

[0064] When the floor cleaning robot is first turned on, the sensors activate to detect whether the curved triangular brush 101 is blocking the water spray nozzle. If the curved triangular brush 101 is not blocking the water spray nozzle, water spraying begins. If the curved triangular brush 101 is blocking the water spray nozzle, based on sensor feedback, the robot first rotates the curved triangular brush 101 until it is no longer blocking the water spray nozzle. Then, the robot moves and sprays water within a range 2-3 times its own shaded area. After spraying for a period of time, the spraying stops, and the curved triangular brush 101 rotates to begin scrubbing the surface to be cleaned. Finally, the water suction module 200 is activated to collect wastewater.

[0065] Preferably, the water-washing cleaning device can be configured with one, two, or four brush plate modules 100, depending on the usage environment and machine size. These can be driven by a single drive motor 301 in conjunction with multiple transmission gears 303, or each brush plate module 110 can be driven by a separate motor. When using two or more brush plate modules 100, a transmission reversing gear 304 should be added to change the direction of the brush plate on one side to counteract radial force and achieve a symmetrical arrangement of the brush plates. For indoor home environments, two curved triangular brush plates 101 can be independently installed, or two curved triangular brush plates 101 can be combined with multiple traditional circular brush plates. The main frame 306 should be a rectangle with a large length-to-width ratio, with the traditional circular brush plate in the middle and the two curved triangular brush plates 101 arranged on both sides. For spacious indoor shopping malls or building facades, four curved triangular brush plates 101 can be installed independently, or four curved triangular brush plates 101 can be combined with a single traditional circular brush plate. The traditional circular brush is positioned at the center of the brush plate, and the four curved triangular brush plates 101 are symmetrically arranged at the four vertices of the square main frame 306 about the central plane of the main frame 306. (Refer to...) Figure 11 In the arrangement 1 of the brush module 100 shown, four curved triangular brushes 101 are respectively located at the four corners of the square main frame 306, and perform planar mirror motion about the center of the main frame 306.

[0066] Reference Figure 12 The second arrangement of the disk brushing modules 100 shown is compared to... Figure 11 Arrangement 1 as shown Figure 12 The main frame 306 in arrangement 2 shown has a large area, and the four brush disk modules 100 are also located near the four corners of the main frame 306. A larger circular brush disk with a larger cleaning area is located in the center. This arrangement allows for faster cleaning of large floor areas, and the torque of the four smaller curved triangular brush disks roughly offsets the torque of the large central circular brush disk. (Refer to...) Figure 13 The third arrangement of the brush module 100 shown features a main frame 306 that is a large rectangle with two curved triangular brushes 101 positioned near the narrower ends, and two traditional circular brushes in the middle. This arrangement facilitates better cleaning of the floor. In all three brush arrangement methods, the coverage area of ​​the curved triangular brushes 101 is larger than that of the main frame 306, effectively avoiding interference from the main frame 306 during the cleaning process.

[0067] Depending on the degree of staining, the usage environment, and the appropriate speed of the thorough cleaning device, the brush rotation speed and water output of the water spray module 400 are adjusted according to the distribution density of the bristles 1013 on the different curved triangular brush discs 101. This ensures that the water (cleaning solution) is thoroughly mixed with the stains on the ground (or facade), guaranteeing the cleaning effect. Simultaneously, it ensures that there is water at the port of the hollow suction tube shaft 111. The gas-liquid mixture is drawn into the suction impeller 202, and the liquid sprayed by the suction impeller 202 impacts the wall of the wastewater collection tank 201 due to inertia and flows to the wastewater outlet at the bottom. The airflow, after being filtered (although it is wastewater) and separated, can be directly discharged from the outer casing of the cleaning mechanism.

[0068] The cleaning device of the present invention can be used in floor cleaning robots or wall-climbing robots for cleaning building facades, and can also be used in handheld floor cleaning machines. The handheld floor cleaning machine can have a slot for manually operating the push handle on the machine shell, and the power switch can be set on the push handle. A moving module can be added to the device. The floor cleaning robot can be equipped with a moving module, including wheels, drive device, etc., and can be electrically controlled. Various electrical control technologies can be applied to the present invention, and their principles will not be described in detail here.

[0069] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A water-washing cleaning device, characterized in that, It includes a main frame (306), a brush plate module (100), a water suction module (200), a water spraying module (400), and a drive module (300). The main frame is set at a certain distance from the ground, and the drive module (300) and the brush plate module (100) are set below the main frame. The brush module (100) rotates and revolves via the drive module (300) to clean the ground; The brush plate module (100) includes a curved triangular brush plate (101) and a hollow straw shaft (111). The hollow straw shaft (111) is a straight shaft, and its suction end is connected to the orifice (1014) of the curved triangular brush plate (101). The outlet end of the hollow straw shaft (111) is connected to the water absorption module. The brush plate module (100) also includes a curved triangular brush plate (101), a planetary reversing gear (102), a planetary gear (103), a sun gear (104), a brush plate drive gear bearing (106), a brush plate drive gear (107), a reversing gear shaft (109), and a brush plate shaft (110). The sun gear (104), brush drive gear (107), planetary reversing gear (102), and reversing gear shaft (109) constitute a planetary gear train; The hollow straw shaft (111) is provided with a three-step shaft with an outer diameter decreasing from large to small. The outer circular surface of the first step shaft is interference-fitted with the inner ring of the brush disk drive gear bearing (106). The outer ring of the brush disk drive gear bearing (106) is interference-fitted with the brush disk drive gear (107), allowing the brush disk drive gear (107) to rotate freely around its axis. The second step shaft is fixed to the sun gear (104), preventing the sun gear (104) from rotating freely. The reversing gear shaft (109) and the brush disk shaft (110) are positioned on the circumference of the spokes of the brush disk drive gear (107), and the reversing gear shaft (109) and the brush disk shaft (110) are respectively connected to the planetary reversing gear (102) and the planetary gear (103). When the brush drive gear (107) rotates, the brush shaft (110) drives the curved triangular brush disk (101) to revolve around the center of the brush drive gear (107); when the brush drive gear (107) rotates, it drives the reversing gear shaft (109) to rotate around the center of the brush drive gear (107), and the planetary reversing gear (102) meshes with the sun gear (104) to make the planetary reversing gear (102) rotate around its geometric center. The planetary reversing gear (102) meshes with the planetary gear (103) to drive the brush shaft (110) to rotate, and drive the curved triangular brush disk (101) to rotate around its geometric center.

2. The water washing and cleaning device according to claim 1, characterized in that, The water absorption module (200) includes a sewage collection tank (201), a water absorption impeller (202), an impeller motor mounting bracket (203), and an impeller motor (204). The sewage collection tank (201) is located above the main frame (306). The sewage collection tank (201) is provided with a flange connection and fixed to the main frame (306). The flange has a groove for holding the water absorption impeller (202). The impeller motor mounting bracket (203) is provided above the sewage collection tank (201) to support the water absorption impeller (202). The sewage collection tank (201) is provided with a drain outlet below it. The outlet end of the hollow suction tube shaft (111) passes through the main frame (306) and is directly connected to the sewage collection tank (201).

3. The water washing and cleaning device according to claim 1, characterized in that, The hollow straw shaft (111) has a fixed shoulder at the outlet end near the main frame (306). The end face of the fixed shoulder has multiple threaded holes, and the hollow straw shaft (111) is fixed on the main frame (306) by threaded connection.

4. The water washing and cleaning device according to claim 1, characterized in that, The ratio of the number of teeth of the sun gear (104) to the number of teeth of the planetary gear (103) is 4:3, and the ratio of the angular velocity of the curvilinear triangular brush disk (101) rotating around its geometric center to the angular velocity of its revolution around the center of the brush disk drive gear (107) is 1:

3.

5. The water washing and cleaning device according to claim 1, characterized in that, The curved triangular brush disk (101) includes a curved edge (1011) and an orifice (1014). At least one of the three types of brush blades, brush strips and brush bristles (1013) is provided on the curved triangular brush disk (101). The orifice (1014) is a circular hole. The cleaning surface of the curved triangular brush disk (101) is provided with brush blades or brush strips (1012) arranged in a centripetal rotation. Each centripetal rotating brush blade or brush strip (1012) has a certain gap as a sewage guiding channel.

6. The water washing and cleaning device according to claim 1, characterized in that, The brush plate module (100) also includes a brush plate connecting frame (113), which is a multi-spoke strip fixed to one side of the cleaning surface of the curved triangular brush plate (101) or integrally formed with the curved triangular brush plate (101) by additive manufacturing. The brush plate connecting frame (113) is fixed to the brush plate shaft (110), and the curved triangular brush plate (101) is driven to rotate by the brush plate shaft (110) through the brush plate connecting frame (113).

7. The water washing and cleaning device according to claim 1, characterized in that, The curved triangular brush disk (101) includes a curved edge (1011), which is constructed as follows: a square with a certain side length is set and its circumcircle is made. Then, the center of the circumcircle is shifted horizontally to the right by a certain distance. Next, the circumcircle is given a rotational motion around the shifted center and a revolution motion around the geometric center of the square. During this period, the arc exposed outside the square is cut off every time the circumcircle revolves by the first angle. This operation is repeated until all the arcs exposed outside the square are cut off. The remaining curve inside the square is the geometric line of the curved edge (1011) of the brush disk.

8. The water washing and cleaning device according to claim 1, characterized in that, The drive module (300) includes a drive motor (301) and a drive gear (302). The drive motor (301) is fixed on the upper side of the main frame (306). The output shaft of the drive motor passes through the main frame (306) and is connected to the drive gear (302) located on the lower side of the main frame (306). The drive gear (302) directly meshes with the brush drive gear (107) or meshes with the brush drive gear (107) through the transmission gear (303). When two or more brush disk modules (100) are provided, the drive module (300) further includes a transmission reversing gear (304), the two or more brush disk modules are arranged on the left and right sides, and the transmission reversing gear (304) is used to change the direction of the curved triangular brush disk (101) on one side.

9. The water washing and cleaning device according to claim 1, characterized in that, The water spraying module (400) includes a water pump (401) or water valve, a clean water tank (402) and a water spray nozzle. The water spraying module (400) is equipped with an infrared sensor or a Hall sensor to detect the position of the curved triangular brush disk (101).

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