Scraping strip, cleaning device and cleaning base station

Abstract

The invention discloses a scraping strip, a cleaning device and a cleaning base station, relates to the technical field of cleaning equipment, and mainly aims to improve the cleaning effect of the cleaning device so as to improve the cleaning efficiency of the cleaning device. According to the main technical scheme, the scraping strip comprises a mounting part which is used for being rotatably connected to a cleaning disc, and the mounting part can rotate on the cleaning disc around the center point of the mounting part; the scraping strip arm comprises a root part and an end part, the root part is connected with the mounting part, the end part is far away from the mounting part, and the scraping strip arm can be driven by the mounting part to rotate around the central point of the mounting part; the outer contour of the scraping bar arm between the root part and the end part is a straight line or an arc line; the included angle between the forward normal vector of the outer contour and the first ray passing through the midpoint of the outer contour is an obtuse angle; wherein the first ray is a ray from the central point of the mounting part to the end part; the outer contour is the contour of the side, making contact with to-be-cleaned matter in the cleaning disc firstly, of the scraping strip arm when the scraping strip arm rotates in the rotating direction.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, and more specifically to a scraper, a cleaning device, and a cleaning base station. Background Technology

[0002] With the development of technology, various cleaning robots have emerged, freeing people from tedious cleaning work. Among them, the most representative cleaning robot is the household robot vacuum cleaner. Robot vacuum cleaners are becoming increasingly versatile, generally possessing functions such as sweeping and mopping. To ensure the implementation of these functions, robot vacuum cleaners are usually used with a cleaning base station, which is responsible for charging, refilling water, and cleaning the robot.

[0003] Cleaning stations typically include a cleaning device for wet cleaning by cleaning robots. This device usually consists of a cleaning disc and a rotating scraper within the disc. The cleaning disc holds the wastewater from the wet cleaning process. As the scraper rotates, it scrapes the disc, causing the wastewater to be discharged into a wastewater tank due to centrifugal force. Higher scraper speeds facilitate the discharge of wastewater into the tank and make it easier to dry the disc. However, in related technologies, higher scraper speeds often result in higher noise levels. To mitigate noise concerns, the scraper's rotation speed is usually kept relatively low, leading to wastewater residue in the cleaning disc. This results in dirt residue remaining on the disc after hot air drying, leading to poor cleaning performance and low cleaning efficiency. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a scraper, a cleaning device, and a cleaning base station, the main purpose of which is to improve the cleaning effect of the cleaning device, thereby improving the cleaning efficiency of the cleaning device.

[0005] In a first aspect, embodiments of the present invention provide a scraper, comprising: a mounting portion rotatably connected to a cleaning tray, the mounting portion being rotatable on the cleaning tray around a center point of the mounting portion; a scraper arm including a root and an end portion, the root being connected to the mounting portion and the end portion being away from the mounting portion, the scraper arm being rotatable around a center point of the mounting portion under the drive of the mounting portion; the distance from the center point of the mounting portion to the end portion is substantially equal to the radius of the cleaning tray; the outer contour of the scraper arm between the root and the end portion is a straight line or an arc; the angle between the positive normal vector of the outer contour passing through the midpoint of the outer contour and a first ray is an obtuse angle; wherein, the first ray is the ray pointing from the center point of the mounting portion to the end portion; the outer contour is the side of the scraper arm that first contacts the material to be cleaned in the cleaning tray when the scraper arm rotates in the rotation direction. The scraper arm includes a first side and a second side. If the scraper arm is a symmetrical shape, either the first side or the second side will be the side that contacts first. If the scraper arm is an asymmetrical shape, the extension trajectory of the outline of the first side intersects the outer edge of the mounting part at one point, and the extension trajectory of the outline of the second side intersects the outer edge of the mounting part at two points, then the first side will be the side that contacts first. If the scraper arm is an asymmetrical shape, the extension trajectory of the outline of the first side intersects the outer edge of the mounting part at two points, and the extension trajectory of the outline of the second side intersects the outer edge of the mounting part at two points, then the side with the larger division ratio will be the side that contacts first. The extension trajectory of the outline of one side of the scraper arm divides the mounting part into two parts, and the ratio of the area of ​​the larger part to the area of ​​the smaller part is the division ratio corresponding to that side.

[0006] Furthermore, if the outer contour is a straight line, the obtuse angle is 95 degrees to 120 degrees.

[0007] Furthermore, the scraper arm has an axisymmetric shape, and the outer and inner contours of the scraper arm are symmetrical with respect to the axis of symmetry of the scraper arm, and the outer and inner contours of the scraper arm are straight lines;

[0008] Alternatively, the scraper arm may be non-axially symmetrical, with its outer and inner contours being straight lines; the first angle is greater than the second angle, wherein the angle between the ray from the first intersection point of the root and the outer contour to the second intersection point of the end and the outer contour and the first ray is the first angle; the angle between the ray from the third intersection point of the root and the inner contour to the fourth intersection point of the end and the inner contour and the first ray is the second angle.

[0009] The inner contour is the contour of the side of the scraper arm that comes into contact with the material to be cleaned in the cleaning tray when the scraper arm rotates in the rotation direction.

[0010] Furthermore, if the outer contour is an arc, the angle between the line connecting the root and the first intersection point of the outer contour and the end point and the second intersection point of the outer contour and the first tangent is 15 degrees to 45 degrees, and / or the angle between the line connecting the root and the first intersection point of the outer contour and the end point and the second intersection point of the outer contour and the second tangent is 15 degrees to 45 degrees.

[0011] Wherein, the first tangent is a tangent to the outer contour passing through the first intersection point; the second tangent is a tangent to the outer contour passing through the second intersection point.

[0012] Furthermore, the rotation direction of the mounting portion is opposite to the extension direction of the root portion along the outer contour toward the end portion.

[0013] Furthermore, the scraper arm has an axisymmetric shape, and the outer and inner contours of the scraper arm are symmetrical with respect to the axis of symmetry of the scraper arm; the outer and inner contours of the scraper arm are arcs.

[0014] Alternatively, the scraper arm may be non-axisymmetric, with its outer and inner contours being arcs; the curvature of the inner contour may not be greater than the curvature of the outer contour.

[0015] Alternatively, the scraper arm may be non-axially symmetrical, with its outer contour being an arc and its inner contour being a straight line.

[0016] The inner contour is the contour of the side of the scraper arm that comes into contact with the material to be cleaned in the cleaning tray when the scraper arm rotates in the rotation direction.

[0017] Furthermore, the scraper also includes:

[0018] An elastic portion is provided, which wraps around the outer and inner contours of the scraper arm along its length, and the lower edge of the elastic portion protrudes beyond the lower edge of the scraper arm.

[0019] Furthermore, at least one of the lower edge of the elastic portion that wraps the outer contour of the scraper arm and the lower edge of the elastic portion that wraps the inner contour of the scraper arm is provided with a plurality of flexible protrusions, and the plurality of flexible protrusions are arranged at intervals along the length direction of the scraper arm.

[0020] Furthermore, at least one of the elastic portion that encloses the outer contour of the scraper arm and the elastic portion that encloses the inner contour of the scraper arm protrudes from the end.

[0021] Furthermore, one of the scraper arm and the elastic part is provided with a plurality of mounting holes, and the other of the scraper arm and the elastic part is provided with a plurality of protrusions, which are inserted into the corresponding mounting holes;

[0022] The plurality of mounting holes are arranged at intervals along the length direction of the scraper arm or the elastic portion;

[0023] Multiple protrusions are arranged at intervals along the length of the scraper arm or the elastic part.

[0024] Secondly, embodiments of the present invention also provide a cleaning base station, including a housing and the aforementioned scraper; the housing is provided with a cleaning tray and a wastewater tank; the mounting part is rotatably disposed in the cleaning tray, and the mounting part is used to drive the scraper arm to rotate around the center point of the mounting part, and to push the material to be cleaned in the cleaning tray to the wastewater tank; the wastewater tank is located on the rotation path of the scraper arm.

[0025] Furthermore, the cleaning device also includes a drive component;

[0026] A boss is provided on the bottom wall of the cleaning tray, and a through hole is provided on the boss to penetrate the bottom wall of the cleaning tray.

[0027] The mounting part is in the shape of a cover, and the mounting part covers the outside of the boss;

[0028] The driving member extends into the through hole and connects to the mounting part, and the driving member is used to drive the mounting part to rotate.

[0029] Furthermore, at least one of the lower edge of the elastic portion that wraps the outer contour of the scraper arm and the lower edge of the elastic portion that wraps the inner contour of the scraper arm is provided with a plurality of flexible protrusions, and the plurality of flexible protrusions are arranged at intervals along the length direction of the scraper arm; the flexible protrusions of the elastic portion of the scraper are interference-fitted with the bottom wall of the cleaning tray.

[0030] And / or,

[0031] At least one of the elastic portion that covers the outer contour of the scraper arm and the elastic portion that covers the inner contour of the scraper arm protrudes from the end, and the portion of the elastic portion that protrudes from the end is interference-fitted with the sidewall of the cleaning disc.

[0032] Thirdly, embodiments of the present invention also provide a cleaning base station, including the aforementioned cleaning device; or the aforementioned scraper. Attached Figure Description

[0033] The following drawings, which are included as part of the embodiments of the present invention, are used to understand the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention.

[0034] In the attached image:

[0035] Figure 1 This is a schematic diagram of a cleaning device from a first-view perspective, provided in an embodiment of the present invention.

[0036] Figure 2 This is a schematic diagram of a cleaning device provided in an embodiment of the present invention from a second perspective.

[0037] Figure 3 This is a schematic diagram of a scraper from one perspective, provided by an embodiment of the present invention;

[0038] Figure 4A This is a schematic diagram of a scraper from another perspective, provided as an embodiment of the present invention;

[0039] Figure 4B A schematic diagram of a scraper provided in an embodiment of the present invention, showing the structure of a first ray and the positive normal vector direction from another perspective;

[0040] Figure 5 This is a schematic diagram of a structure for analyzing the force on the liquid-pushing side of a scraper, provided in an embodiment of the present invention.

[0041] Figure 6 A schematic diagram of the structure provided in this embodiment of the invention, showing the angle between the line connecting the first and second intersection points of the scraper and the first tangent, and the angle between the line connecting the first and second intersection points and the second tangent;

[0042] Figure 7A This is a schematic diagram of another scraper structure provided in an embodiment of the present invention;

[0043] Figure 7B A structural schematic diagram illustrating the extension direction of the inner contour and the extension direction of the outer contour of another scraper provided in an embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram of the structure of another scraper provided in an embodiment of the present invention from one perspective;

[0045] Figure 9 A schematic diagram of the structure of another scraper provided in an embodiment of the present invention, showing the direction of the first ray and the positive normal vector, is shown from another perspective.

[0046] Figure 10 A schematic diagram of a structure for force analysis of the liquid-pushing side of a scraper provided in an embodiment of the present invention;

[0047] Figure 11 This is a schematic diagram of another scraper provided in an embodiment of the present invention;

[0048] Figure 12 This is a schematic diagram of another scraper provided in an embodiment of the present invention.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1-Scraper arm; 11-Outer contour; 12-Inner contour; 13-Root; 14-End; 111-First intersection; 112-Second intersection; 12-Rotation center; 2-Elastic part; 21-Tail; 3-Mounting part; 100-Housing; 101-Cleaning disc; 1011-Boss; 1012-Through hole; 102-Sewage tank. Detailed Implementation

[0051] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0052] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0053] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0054] The higher the scraper speed, the easier it is for wastewater to overcome centripetal force and drain into the wastewater tank, and the easier it is to spin-dry the wastewater in the cleaning tray. In related technologies, because the higher the scraper speed, the greater the noise, the scraper speed is usually not very fast in order to address the noise issue. This results in wastewater remaining in the cleaning tray, and dirt remaining in the cleaning tray after hot air drying, leading to poor cleaning effect and low cleaning efficiency of the cleaning device.

[0055] This invention provides a scraper blade, which is installed on a base station where a cleaning robot docks. The cleaning robot can be a self-propelled cleaning robot or other types of cleaning robots that meet the requirements. Specifically, the cleaning robot is a sweeping robot, equipped with a wet cleaning module. The base station corresponding to the sweeping robot is equipped with a cleaning device, which includes cleaning ribs, a washing disc, and a wastewater tank. After the sweeping robot docks at the base station, the wet cleaning module rotates and generates friction with the cleaning ribs, causing wastewater and dirt on the wet cleaning module to fall into the washing disc below the cleaning ribs. The washing disc is connected to the wastewater tank. By rotating the scraper relative to the washing disc, the wastewater and dirt on the washing disc are collected into the wastewater tank.

[0056] Through extensive experiments and research, the inventors of this application have discovered that, in addition to the rotational speed of the scraper arm, the shape and rotation direction of the scraper arm can also affect the water-pushing effect of the scraper arm, thereby affecting the cleaning efficiency of the scraper arm.

[0057] like Figure 1 To Figure 4, Figure 8 and Figure 9 As shown, the scraper includes a mounting part 3, which is rotatably connected to the cleaning disc and can rotate around the center point of the mounting part 3 on the cleaning disc; the scraper arm 1 includes a root 13 and an end 14, the root 13 is connected to the mounting part 3, and the end 14 is away from the mounting part 3. The scraper arm 1 can rotate around the center point of the mounting part 3 under the drive of the mounting part 3.

[0058] The scraper arm 1 and the mounting part 3 can be integrally formed, or they can be formed separately and then combined together by bonding or other means, so that the scraper arm 1 can rotate around the center point of the mounting part 3 under the drive of the mounting part 3.

[0059] It is understood that the scraper arm includes a first side and a second side. When the scraper arm rotates, one of the first side and the second side contacts the material to be cleaned in the cleaning tray first, and the other side contacts the material to be cleaned in the cleaning tray later. In the embodiments of this application, the side that contacts the material to be cleaned in the cleaning tray first is taken as the outer side of the scraper arm, and the outline of the outer side of the scraper arm is taken as the outer outline of the scraper arm. Correspondingly, the outline of the inner side of the scraper arm is taken as the inner outline of the scraper arm.

[0060] Understandably, the scraper arm 1 has a certain thickness. Therefore, the outer contour between the root 13 and the end 14 of the scraper arm 1 is a surface, that is, the outer side surface of the scraper arm 1. However, since the thickness of the scraper arm 1 is small, that is, the scraper arm 1 is relatively thin, the thickness of the scraper arm 1 can be ignored here, and the outer contour and inner contour of the scraper arm 1 can be regarded as contour lines.

[0061] Understandably, which side, the first or the second, is designated as the outer side of the scraper arm depends on the shape of the first and the second sides. In other words, the direction of rotation of the scraper arm is determined based on the shape of the first and the second sides of the scraper arm.

[0062] If the scraper arm is a symmetrical shape, then either the first side or the second side will be the side that contacts first. The direction of rotation of the scraper arm is either counterclockwise or counterclockwise.

[0063] If the scraper arm is an asymmetrical shape, and the extended trajectory of the first side's outline intersects the outer edge of the mounting part at one point, while the extended trajectory of the second side's outline intersects the outer edge of the mounting part at two points, then the first side is the side that contacts first. For example... Figure 7A As shown, the extended trajectory of the outline of the first side 11 is tangent to the outer edge of the mounting part and has one intersection point, while the extended trajectory of the outline of the second side 12 has two intersection points with the outer edge of the mounting part, so the first side 11 is the outer side. Figure 7A The scraper arm shown rotates counterclockwise. When the scraper arm rotates counterclockwise, the first side 11 is the side that comes into contact with the material to be cleaned first. If the scraper arm rotates clockwise, the second side 12 is the side that comes into contact with the material to be cleaned first.

[0064] If the scraper arm is an asymmetrical shape, and the extended trajectory of the contour line on the first side intersects the outer edge of the mounting part at two points, and the extended trajectory of the contour line on the second side also intersects the outer edge of the mounting part at two points, then the side with the larger segmentation ratio is the side that contacts first. Specifically, the extended trajectory of the contour line on one side of the scraper arm divides the mounting part into two parts; the ratio of the area of ​​the larger part to the area of ​​the smaller part is the segmentation ratio for that side. It is understandable that if the two parts have equal areas, the segmentation ratio is 1. Figure 7B As shown, the extended trajectories of the contour lines of the first side 11 and the second side 12 both intersect the outer edge of the mounting portion at two points. The extended trajectories of the contour lines of the second side 12 divide the mounting portion into two parts of approximately equal area, with a division ratio of 1; the extended trajectories of the contour lines of the first side 11 divide the mounting portion into two parts of significantly different area, with a division ratio greater than 1. Therefore, the first side is considered the side that first contacts the substance to be cleaned. Figure 7B The scraper arm shown rotates counterclockwise.

[0065] The shape of the scraper arm is described below. The outer contour 11 of the scraper arm 1 between the root 13 and the end 14 is a straight line or an arc; the outer contour of the scraper arm between the root and the end is a straight line or an arc; the angle between the positive normal vector of the outer contour passing through the midpoint of the outer contour and the first ray is an obtuse angle. The first ray is the ray pointing from the center point of the mounting part 3 to the end 14. If the outer contour 11 is an arc, the angle between the positive normal vector of the outer contour and the first ray is an obtuse angle.

[0066] If the outer contour of the scraper arm is an arc, connect the two endpoints of the outer contour to obtain a line segment between the endpoints. The ray passing through the midpoint of this line segment, perpendicular to the line segment, and pointing towards the center of the circle containing the arc, is the positive normal vector of the outer contour. For example... Figure 4B As shown, Figure 4B The two dashed lines in the diagram represent the first ray and the positive normal vector of the outer contour, respectively, with an obtuse angle between them. In other words, if the outer contour 11 of the scraper arm 1 is an arc, then the outer contour 11 is an arc that convexes outward in the direction of rotation of the scraper arm.

[0067] When the outer contour 11 is a convex arc, such as Figure 5 As shown, a force analysis is performed on a point on the outer contour 11. The force exerted by the scraper arm 1 on the liquid at that point is F (for example, F is the opposite direction of the positive normal vector). F1 is the circumferential component of F in the rotation direction of the scraper arm 1 (the direction of F1 is the tangent to the rotation trajectory of that point), F2 is the radial component of F in the rotation direction of the scraper arm 1 (the direction of F2 is the direction of the line connecting the center point of the mounting part and that point), and α is the angle between F1 and F. Therefore, F2 = F1tanα. Here, F2 is the force that propels the liquid radially along the rotation direction of the scraper arm 1.

[0068] Assuming the shape of the outer contour 11 is the only variable, and since the torque and other parameters of the driving component (such as a motor) that drives the scraper arm 1 to rotate are fixed, F1 remains constant. By changing the shape of the outer contour 11, the size of angle α will change accordingly. For example, the more convex the outer contour 11 is, the larger angle α becomes; that is, the greater the curvature of the outer contour 11, the larger angle α becomes. From F2 = F1tanα, we know that the larger the angle α, the larger the value of F2, and the better the effect of the scraper arm 1 in draining liquid outwards.

[0069] Therefore, when the scraper arm 1 rotates at the same speed, making the outer contour 11 into an outwardly convex arc shape can increase the force of the scraper arm 1 on the liquid in the direction of rotation. This facilitates the outward ejection of the substances to be cleaned in the liquid under the action of the radial component force, thereby increasing the amount of waste discharged by the scraper arm 1, reducing the amount of substances to be cleaned remaining in the cleaning tray, improving the cleaning effect of the cleaning device, and thus improving the cleaning efficiency of the cleaning device.

[0070] If the outer contour of the scraper arm is a straight line (actually a line segment), the ray passing through the midpoint of the outer contour, perpendicular to the outer contour, and pointing towards the center point of the mounting part is the positive normal vector of the outer contour. It's important to understand that the ray pointing towards the center point of the mounting part does not mean the ray passes through the center point. There are two rays passing through the midpoint of the outer contour and perpendicular to the outer contour; one extends towards the center point, and the other extends away from the center point. The ray pointing towards the center point of the mounting part is the ray extending towards the center point. For example... Figure 9 As shown, Figure 9 The two dashed lines in the middle are the positive normal vectors of the first ray and the outer contour, respectively, and the angle between them is obtuse. That is to say, if the outer contour 11 of the scraper arm 1 is a straight line, then the outer contour is a straight line that tapers inward along the direction away from the mounting part.

[0071] In some embodiments, when the outer contour 11 of the scraper arm 1 is a straight line, such as Figure 10 As shown, a force analysis is performed on a point on the outer contour 11. The force exerted by the scraper arm 1 on the liquid at that point is F′ (exemplary, the direction of F′ is the opposite direction of the positive normal vector). F1′ is the circumferential component of F′ in the rotation direction of the scraper arm 1 (the direction of F1′ is the tangent to the rotation trajectory of that point), F2′ is the radial component of F′ in the rotation direction of the scraper arm 1 (the direction of F2 is the direction of the line connecting the center point of the mounting part and that point), and β is the angle between F1′ and F′. ​​Therefore, F2′ = F1′tanβ. The effect of F2′ is to radially and outwardly fling the liquid along the rotation direction of the scraper arm 1. γ is the angle formed between the straight line containing the outer contour 11 and the first ray. The first ray is the ray pointing from the center point of the mounting part 3 to the end 14.

[0072] As the outer contour of the scraper arm 1 changes, the γ angle also changes accordingly. For example, the larger the γ angle, the smaller the length of the scraper arm 1. Assuming the γ angle is a unique variable, since the torque and other parameters of the driving component (such as a motor) that drives the scraper arm 1 to rotate are fixed, F1′ remains unchanged. Figure 10 It can be seen that β>γ, therefore, the larger the γ angle is, the larger the β angle is; moreover, from F2′=F1′tanβ, it can be seen that the larger the β angle is, the larger the value of F2′ is, and the better the effect of scraper arm 1 in draining liquid outward.

[0073] When the scraper arm 1 rotates at the same speed, the outer contour 11 is a straight line that tapers inward in the direction away from the mounting part. This can increase the force of the scraper arm 1 on the liquid in the direction of rotation, thereby making it easier for the substances to be cleaned in the liquid to be thrown outward under the action of the radial component force, increasing the amount of dirt discharged by the scraper arm 1, thereby reducing the amount of dirt residue in the cleaning tray, improving the cleaning effect of the cleaning device, and thus improving the cleaning efficiency of the cleaning device.

[0074] The scraper provided in this embodiment of the invention, due to the special shape of the scraper arm and the selection of the scraper arm rotation direction, can increase the force of splashing liquid in the radial direction along the rotation direction of the scraper arm 1 compared to a curve that is concave in the rotation direction of the scraper arm 1. This makes it easier for the substances to be cleaned in the liquid to be flung outward under the action of the radial component force, thereby reducing the amount of substances to be cleaned remaining in the cleaning tray, improving the cleaning effect of the cleaning device, and thus improving the cleaning efficiency of the cleaning device.

[0075] In some embodiments, referring to FIG4, the outer contour of the mounting part 3 is circular. This can evenly distribute the forces acting on the mounting part 3 in all directions when it rotates, making the rotation of the mounting part 3 more stable, which helps to improve the overall stability of the scraper blade rotation, and improves the durability and service life of the scraper blade.

[0076] In some embodiments, the outer contour of the mounting part 3 is circular; the extension trajectory of the outer contour intersects the outer edge of the mounting part at one or two points.

[0077] When the outer contour 11 of the scraper arm intersects with the outer edge of the mounting part, the circle containing the outer contour 11 and the circle of the outer edge of the mounting part 3 are internally tangent at that intersection point. This structural arrangement allows the outer edge of the circular mounting part 3 and the outer contour 11 of the scraper arm 1 to connect smoothly with fewer dead angles, which helps maintain the cleanliness of the scraper itself.

[0078] In some other embodiments, the extension trajectory of the outer contour 11 intersects the outer edge of the mounting portion at two points, and the length of the minor arc between the two intersection points is less than 1 / 5 of the circumference of the outer edge of the mounting portion 3. That is, the circle containing the outer contour 11 and the circle containing the outer edge of the mounting portion 3 can also intersect, resulting in two intersection points. In this case, to ensure the scraper works better, the length of the minor arc between the two intersection points can be less than 1 / 5 of the circumference of the circle containing the mounting portion 3, thereby minimizing dead angles on the outer edge of the scraper and ensuring that the scraper maintains its cleanliness. Simultaneously, it also ensures that the scraper arm 1 has sufficient water-pushing length, thereby guaranteeing the cleaning effect of the scraper on the cleaning disc.

[0079] When the outer contour 11 of the scraper arm 1 is a straight line, the obtuse angle between the positive normal vector of the outer contour passing through the midpoint of the outer contour and the first ray is 95 degrees to 120 degrees. In this way, the γ angle can be guaranteed to be 5 degrees to 30 degrees, thereby ensuring that the scraper arm 1 has a certain length and a good drainage effect.

[0080] The scraper arm 1 primarily uses its outer contour 11 to apply force to the liquid, dislodging the material to be cleaned. The outer contour 11 significantly impacts cleaning efficiency, while the inner contour 12 has a smaller impact and offers greater design flexibility. Therefore, given a fixed outer contour line, the inner contour line can have various designs. For example, if the outer contour 11 of the scraper arm 1 is a straight line, further, if the scraper arm has an axisymmetric shape, with the outer and inner contours symmetrical about the axis of symmetry, the outer and inner contours of the scraper arm can be straight lines (e.g.,...). Figure 8 , Figure 9 , Figure 10 (as shown); or, the shape of the scraper arm is non-axially symmetric, and the outer and inner contours of the scraper arm are straight lines; the first included angle is greater than the second included angle (as shown). Figure 11 As shown in the diagram, the angle between the ray pointing from the first intersection point of the root and the outer contour to the second intersection point of the end and the outer contour and the first ray is the first included angle; the angle between the ray pointing from the third intersection point of the root and the inner contour to the fourth intersection point of the end and the inner contour and the first ray is the second included angle; it can be understood that the first included angle is an acute angle, and the second included angle is an acute angle or a 0-degree angle. The inner contour is the contour of the side of the scraper arm that comes into contact with the material to be cleaned in the cleaning tray when the scraper arm rotates in the rotation direction.

[0081] Even when the outer contour 11 of the scraper arm 1 is curved, the curvature of the outer contour 11 cannot be too large in order to ensure a reliable cleaning effect. See [link / reference] Figure 6 In some embodiments, when the outer contour 11 of the scraper arm 1 is curved, the angle δ1 between the line connecting the first intersection point of the root and the outer contour and the second intersection point of the end and the outer contour and the first tangent is 15 degrees to 45 degrees, and / or the angle δ2 between the line connecting the first intersection point of the root and the outer contour and the second intersection point of the end and the outer contour and the second tangent is 15 degrees to 45 degrees; wherein, the first tangent is a tangent to the outer contour passing through the first intersection point; and the second tangent is a tangent to the outer contour passing through the second intersection point.

[0082] By limiting δ1 and / or δ2 to the range of 15 to 45 degrees, and further to the range of 20 to 40 degrees, excessive curvature of the outer contour 11 can be avoided. At the same time, the radial component of the rotation direction of the scraper arm 1 can be increased, which facilitates the outward ejection of external cleaning substances in the liquid under the action of the radial component, thereby increasing the amount of dirt discharged by the scraper arm 1, reducing the amount of dirt residue in the cleaning tray, improving the cleaning effect of the cleaning device, and thus improving the cleaning efficiency of the cleaning device.

[0083] As mentioned earlier, the inner contour 12 has considerable design flexibility. Therefore, given a defined outer contour line, the inner contour line can have various designs. For example, when the outer contour 11 of the scraper arm 1 is curved, in some embodiments, the scraper arm has an axisymmetric shape, with the outer and inner contours of the scraper arm symmetrical about its axis of symmetry, and both the outer and inner contours are curved (e.g., ...). Figure 3 , Figure 4A , Figure 4B , Figure 5 , Figure 6 (As shown). In some embodiments, the scraper arm has a non-axisymmetric shape, with both its outer and inner contours being arcs, wherein the curvature of the inner contour is not greater than the curvature of the outer contour. For example, both arcs are convex outwards along the rotation direction of the scraper arm, and the curvature of the inner contour is not greater than, i.e., less than or equal to, the curvature of the outer contour. When the curvature of the inner contour is equal to the curvature of the outer contour, the length of the end of the scraper arm between the inner and outer contours is the same as the length of the root of the scraper arm between the inner and outer contours; when the curvature of the inner contour is less than the curvature of the outer contour, the length of the end of the scraper arm between the inner and outer contours is less than the length of the root of the scraper arm between the inner and outer contours (e.g., Figure 12 As shown). In some embodiments, the scraper arm has a non-axisymmetric shape, with an outer contour that is curved and an inner contour that is straight (e.g., as shown). Figure 7A , Figure 7B (As shown). The inner contour is the contour of the side of the scraper arm that comes into contact with the material to be cleaned in the cleaning tray when the scraper arm rotates in the direction of rotation.

[0084] Regardless of whether the outer contour 11 of the scraper arm 1 is a straight line or an arc, when the scraper arm is non-axially symmetrical, the overall volume of the scraper is smaller, resulting in a smaller area covered by the cleaning disc. This reduces the possibility of dirt accumulating between the scraper arm 1 and the cleaning disc, thus improving the cleaning effect of the scraper on the cleaning disc. When the scraper arm is axially symmetrical, the scraper can operate without restricting the rotation direction of the scraper arm 1. By controlling the rotation of the scraper arm 1, the outer contour 11 can make contact with the material to be cleaned first, thereby achieving the cleaning function of the scraper, making the assembly and use of the scraper more convenient. Furthermore, in the case where two cleaning discs share a wastewater tank in a cleaning base station, when the scraper arm is axially symmetrical, the scrapers of the left and right cleaning discs can be used interchangeably, simply by reversing their rotation directions, making assembly even simpler.

[0085] In summary, once the dimensions and shape of the outer contour 11 of the scraper arm 1 are determined, adjusting the inner contour 12 can create scrapers of varying widths and shapes. The appropriate dimensions and shape of the inner contour 12 can be selected by comprehensively considering factors such as manufacturing difficulty, contact area with the cleaning disc, whether the scraper itself easily retains water, and whether it possesses sufficient strength and rotational stability. In practice, the above-described embodiments can be selected according to actual needs.

[0086] In some embodiments, see Figure 3 or Figure 8 The scraper may also include an elastic part 2, which wraps around the outer contour 11 and inner contour 12 of the scraper arm 1 along the length direction of the scraper arm 1, and the lower edge of the elastic part 2 protrudes from the lower edge of the scraper arm 1.

[0087] As the scraper arm 1 rotates with the mounting part 3, the lower edge of the elastic part 2 protrudes beyond the lower edge of the scraper arm 1. Therefore, the elastic part 2 can contact the bottom of the cleaning disc, so that the scraper and the bottom of the cleaning disc are in an interference fit. Thus, the elastic part 2 deforms when it contacts the bottom of the cleaning disc, ensuring full contact between the scraper and the cleaning disc. This not only ensures the scraping effect of the scraper arm 1, but also avoids damage to the structural components and extends the service life of the cleaning device.

[0088] Specifically, the elastic part 2 can be made of a flexible material that can deform, such as soft rubber or silicone.

[0089] In some embodiments, a plurality of flexible protrusions are provided on at least one of the lower edge of the elastic portion 2 of the outer contour 11 of the scraper arm 1 and the lower edge of the elastic portion 2 of the inner contour 12 of the scraper arm 1, and the plurality of flexible protrusions are arranged at intervals along the length direction of the scraper arm 1.

[0090] The flexible protrusion can contact the bottom of the cleaning disc, forming a flow guide cavity with the elastic part 2. This allows wastewater to flow smoothly out of the scraper under the guidance of the flow guide cavity, preventing wastewater from accumulating between the two lower edges of the elastic part 2 of the scraper arm 1, thereby preventing wastewater from accumulating inside the scraper.

[0091] In some embodiments, see Figure 3 or Figure 8 At least one of the tail portion 21 of the elastic portion 2 located on the outer contour 11 of the scraper arm 1 and the tail portion 21 of the elastic portion 2 located on the inner contour 12 of the scraper arm 1 protrudes from the end 14.

[0092] As the scraper arm 1 rotates with the mounting part 3, the tail 21 of the elastic part 2 protrudes from the end 14 of the scraper arm 1. Therefore, the elastic part 2 can contact the side of the cleaning disc, so that the scraper and the side of the cleaning disc are in an interference fit. This causes the elastic part 2 to deform due to the interference fit between the bottom and the side of the cleaning disc, thereby ensuring more sufficient contact between the scraper and the cleaning disc. This not only better guarantees the water-scraping effect of the scraper arm 1, but also better avoids damage to structural components, thus extending the service life of the cleaning device. In addition, when the two scraper arms 1 located in the two cleaning discs interfere with each other and collide, the elastic part 2 can prevent the scraper arms 1 from being damaged.

[0093] In some embodiments, one of the scraper arm 1 and the elastic part 2 may be provided with a plurality of mounting holes, and the other of the scraper arm 1 and the elastic part 2 may be provided with a plurality of protrusions, which are inserted into the corresponding mounting holes; the plurality of mounting holes are arranged at intervals along the length direction of the scraper arm 1 or the elastic part 2; the plurality of protrusions are arranged at intervals along the length direction of the scraper arm 1 or the elastic part 2.

[0094] The protrusions are inserted into the corresponding mounting holes, allowing the elastic part 2 to be detachably connected to the scraper arm 1. When the elastic part 2 needs cleaning or maintenance, it can be easily and quickly disassembled from the scraper arm 1, thus enabling rapid replacement of the elastic part 2. The operation is simple, convenient, and quick.

[0095] like Figure 1 and Figure 2 As shown, this embodiment of the invention also provides a cleaning device, including a housing 100 and the aforementioned scraper; the housing 100 is provided with a first cleaning disc and a second cleaning disc, and a mounting part 3 is rotatably disposed in the first and second cleaning discs, the mounting part 3 being used to drive the scraper arm 1 to rotate around the center point of the mounting part 3; the first and second cleaning discs are connected to a wastewater tank, and at least a portion of the wastewater tank is located within the rotation path of the scraper arm 1 in the cleaning discs. Therefore, during rotation, the scraper can throw the material to be cleaned in the cleaning discs into the wastewater tank, achieving wastewater discharge.

[0096] The cleaning device provided in this embodiment of the invention includes the aforementioned scraper, and therefore has all the beneficial effects of the scraper, which will not be repeated here.

[0097] It should be noted that the implementation and working principle of the scraper involved in this embodiment can be found in the corresponding content of the above embodiments, and will not be repeated here.

[0098] In some embodiments, see Figure 1A boss 1011 may be provided on the bottom wall of the cleaning tray 101, and a through hole 1012 is provided on the boss 1011 to penetrate the bottom wall of the cleaning tray 101; the mounting part 3 is in the shape of a cover and is provided on the outside of the boss 1011; the driving member extends into the through hole 1012 and is connected to the mounting part 3, and the driving member is used to drive the mounting part 3 to rotate.

[0099] The mounting part 3 can be snapped into the drive component, so that the drive component can rotate to drive the mounting part 3 to rotate. At the same time, the mounting part 3 is snapped into the drive component, which facilitates the disassembly and replacement of the mounting part 3, so as to regularly maintain the cleaning disc and scraper, prevent dirt and bacteria from accumulating on the cleaning disc and scraper, and ensure the cleanliness of the cleaning disc and scraper.

[0100] In the above embodiment, after the driving member that drives the mounting part 3 to rotate is connected to the driving device, it extends out from the through hole 1012 of the boss 1011. The mounting part 3 is fastened to the boss 1011 so that the mounting part 3 is positioned by the boss 1011. The first snap-fit ​​member on the mounting part is snapped and fixed to the second snap-fit ​​member on the driving member, so that the mounting part 3 is stably connected to the driving member. Thus, under the drive of the driving member, the mounting part 3 can rotate relative to the cleaning disc and scrape the sewage on the cleaning disc.

[0101] In some embodiments, the flexible protrusion of the elastic portion 2 of the scraper blade is interference-fitted with the bottom wall of the cleaning disc 101, and the tail portion 21 of the elastic portion 2 of the scraper blade is interference-fitted with the side wall of the cleaning disc 101. This interference fit between the elastic portion 2 and the bottom and sides of the cleaning disc causes deformation, thereby ensuring more thorough contact between the scraper blade and the cleaning disc. This not only better guarantees the water-scraping effect of the scraper arm 1 but also better prevents damage to structural components, thus extending the service life of the cleaning device.

[0102] In some embodiments, there can be multiple cleaning discs 101, which are interconnected and all are connected to the wastewater tank 102. That is, there can be multiple cleaning discs, such as two. Each cleaning disc is equipped with a scraper, enabling multiple scrapers to perform cleaning work simultaneously, thereby further improving the cleaning effect of the cleaning device.

[0103] This invention also provides a cleaning base station, including the aforementioned cleaning device or the aforementioned scraper.

[0104] The cleaning base station provided in this embodiment of the invention includes the aforementioned cleaning device or scraper, and therefore has all the beneficial effects of the scraper, which will not be repeated here.

[0105] It should be noted that the implementation and working principle of the scraper involved in this embodiment can be found in the corresponding content of the above embodiments, and will not be repeated here.

[0106] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A doctor blade, characterized in that, The scraper comprises: a mounting portion for rotatably connecting to a cleaning disc, the mounting portion being rotatable about a center point of the mounting portion on the cleaning disc; a scraper arm comprising a root portion and an end portion, the root portion being connected to the mounting portion and the end portion being away from the mounting portion, the scraper arm being rotatable about the center point of the mounting portion under the drive of the mounting portion; an outer contour of the scraper arm between the root portion and the end portion is a straight line or an arc line; an included angle between a normal vector of the outer contour passing through a midpoint of the outer contour and a first ray is obtuse; wherein the first ray is a ray from the center point of the mounting portion pointing to the end portion; the outer contour is a contour of a side of the scraper arm which first contacts a material to be cleaned in the cleaning disc when the scraper arm rotates in a rotating direction; the scraper arm comprises a first side and a second side, if the scraper arm is a symmetric figure, either of the first side and the second side is the side which first contacts the material to be cleaned; if the scraper arm is a non-symmetric figure, an extended trajectory of a contour line of the first side has one intersection point with an outer edge of the mounting portion and an extended trajectory of a contour line of the second side has two intersection points with the outer edge of the mounting portion, the first side is the side which first contacts the material to be cleaned; if the scraper arm is a non-symmetric figure, the extended trajectory of the contour line of the first side has two intersection points with the outer edge of the mounting portion and the extended trajectory of the contour line of the second side has two intersection points with the outer edge of the mounting portion, a side corresponding to a larger segmentation ratio is the side which first contacts the material to be cleaned; wherein the extended trajectory of the contour line of a side of the scraper arm cuts the mounting portion into two parts, and an area ratio of a larger part to a smaller part of the two parts is the segmentation ratio of the side.

2. The wiper strip of claim 1, wherein If the outer contour is a straight line, the obtuse angle is 95 degrees to 120 degrees.

3. The scraper according to claim 2, wherein a shape of the scraper arm is an axisymmetric shape, an outer contour and an inner contour of the scraper arm are symmetrical relative to an axis of symmetry of the scraper arm, and the outer contour and the inner contour of the scraper arm are straight lines; or, a shape of the scraper arm is a non-axisymmetric shape, the outer contour and the inner contour of the scraper arm are straight lines, a first angle is larger than a second angle, wherein an included angle between a ray from a first intersection point of the root portion and the outer contour to a second intersection point of the end portion and the outer contour and the first ray is the first angle, and an included angle between a ray from a third intersection point of the root portion and the inner contour to a fourth intersection point of the end portion and the inner contour and the first ray is the second angle; the inner contour is a contour of a side of the scraper arm which second contacts the material to be cleaned in the cleaning disc when the scraper arm rotates in the rotating direction.

4. The wiper strip of claim 1, wherein If the outer contour is an arc line, an included angle between a line connecting the first intersection point of the root portion and the outer contour and the second intersection point of the end portion and the outer contour and a first tangent line is 15 degrees to 45 degrees, and / or an included angle between the line connecting the first intersection point of the root portion and the outer contour and the second intersection point of the end portion and the outer contour and a second tangent line is 15 degrees to 45 degrees. The first tangent line is a tangent line of the outer contour passing through the first intersection point; and the second tangent line is a tangent line of the outer contour passing through the second intersection point.

5. The wiper strip of claim 4, wherein The rotation direction of the mounting portion is opposite to the extension direction of the root portion along the outer contour to the end portion.

6. The wiper strip according to claim 5, wherein The wiper strip arm has an axisymmetric shape, and the outer contour and the inner contour of the wiper strip arm are symmetrical relative to the axis of symmetry of the wiper strip arm; the outer contour and the inner contour of the wiper strip arm are arc lines; Alternatively, the wiper strip arm has a non-axisymmetric shape, and the outer contour and the inner contour of the wiper strip arm are arc lines; the curvature of the inner contour is not greater than the curvature of the outer contour; Alternatively, the wiper strip arm has a non-axisymmetric shape, and the outer contour of the wiper strip arm is an arc line, and the inner contour of the wiper strip arm is a straight line; The inner contour is the contour of the side of the wiper strip arm that is first contacted by the to-be-cleaned substance in the cleaning disc when the wiper strip arm rotates in the rotation direction.

7. A wiper strip according to any one of claims 1-6, characterised in that Further comprising: The elastic portion wraps the outer contour and the inner contour of the wiper strip arm along the length direction of the wiper strip arm, and the lower edge of the elastic portion protrudes from the lower edge of the wiper strip arm.

8. The wiper strip according to claim 7, wherein At least one of the lower edge of the elastic portion wrapping the outer contour of the wiper strip arm and the lower edge of the elastic portion wrapping the inner contour of the wiper strip arm is provided with a plurality of flexible protrusions, and the plurality of flexible protrusions are arranged at intervals along the length direction of the wiper strip arm.

9. The wiper strip according to claim 7, wherein At least one of the elastic portion wrapping the outer contour of the wiper strip arm and the elastic portion wrapping the inner contour of the wiper strip arm protrudes from the end portion.

10. The wiper strip according to claim 7, wherein A plurality of mounting holes are formed in one of the wiper strip arm and the elastic portion, and a plurality of protruding portions are arranged on the other one of the wiper strip arm and the elastic portion, the protruding portions being inserted into the corresponding mounting holes; The plurality of mounting holes are arranged at intervals along the length direction of the wiper strip arm or the elastic portion; The plurality of protruding portions are arranged at intervals along the length direction of the wiper strip arm or the elastic portion.

11. A cleaning device characterized by Further comprising: The shell and the wiper strip according to any one of claims 1 to 10; The shell is provided with a cleaning disc and a sewage tank; The mounting portion is rotatably arranged in the cleaning disc, and is used to drive the wiper strip arm to rotate around the center point of the mounting portion, so as to push the to-be-cleaned substance in the cleaning disc to the sewage tank; the sewage tank is located on the rotation path of the wiper strip arm.

12. The cleaning device of claim 11, wherein, The cleaning device further comprises a driving member; The bottom wall of the cleaning disc is provided with a boss, and the boss is provided with a through hole penetrating through the bottom wall of the cleaning disc; The mounting portion is in the form of a cover, and the mounting portion covers the outside of the boss; The driving member extends into the through hole and is connected with the mounting portion, and the driving member is used to drive the mounting portion to rotate.

13. The cleaning device according to claim 11, wherein At least one of the lower edge of the resilient portion wrapping the outer profile of the wiper arm and the lower edge of the resilient portion wrapping the inner profile of the wiper arm is provided with a plurality of flexible protrusions, the flexible protrusions being arranged in intervals along the length direction of the wiper arm; the flexible protrusions of the resilient portion of the wiper arm are in interference fit with the bottom wall of the washing tray; and / or, At least one of the resilient portion wrapping the outer profile of the wiper arm and the resilient portion wrapping the inner profile of the wiper arm protrudes from the end portion, the portion of the resilient portion protruding from the end portion being in interference fit with the side wall of the washing tray.

14. A cleaning base station, characterized by, Comprise: The cleaning device of any one of claims 11 to 13; Or the wiper of any one of claims 1 to 10.

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