Cleaning equipment with liftable roller brush

Abstract

The utility model belongs to the technical field of cleaning equipment, and particularly provides cleaning equipment with a liftable roller brush, which comprises a main body, the main body is provided with a support and the roller brush, and the roller brush is rotatably mounted in the support; the main body is further provided with a driving assembly and a transmission assembly which are used for driving the support to swing so as to enable the roller brush to ascend and descend, the driving assembly is provided with a rotatable driving shaft, the transmission assembly comprises a gear connected with the driving shaft and a rack connected with the support, the rack is arc-shaped, and the radian of the arc-shaped rack is consistent with the swing radian of the support. The circle center of the circle where the arc-shaped rack is located is located on the swing axis of the support, and the gear is in meshing transmission with the arc-shaped rack and synchronously rotates along with the driving shaft. The transmission stability between the driving assembly and the transmission assembly can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cleaning electrical appliances, and specifically provides a cleaning device with a lifting roller brush. Background Art

[0002] With the development of cleaning technology, the cleaning components of cleaning equipment usually have a passive floating function to adapt to uneven floors. Some cleaning components also have an active lifting function. When the host recognizes an obstacle, it will actively lift the cleaning component to facilitate obstacle crossing. Or when the ground needs to be cleaned forcefully, the cleaning component will be pressed down to increase the friction between the ground and achieve a better cleaning effect.

[0003] In the related art, the cleaning component is usually lifted or pressed down in a swinging manner. A driving component is provided on one side of the cleaning component to drive the cleaning component to rotate forward and reverse around a swing axis on the other side to achieve up and down swinging of the cleaning component.

[0004] In order to drive the bracket to swing, the driving component is usually a linear drive, such as an electric push rod, or a rotary motor and a linear transmission component. The linear transmission component is used to convert the rotary motion of the rotary motor into linear motion. However, there is a certain activity gap between the swinging motion of the cleaning component and the linear motion of the driving component, which causes unstable transmission. Utility Model Content

[0005] The utility model aims to provide a cleaning device with a roller brush that can be raised and lowered, which can solve the problem of unstable transmission between a driving component and a roller brush bracket.

[0006] In order to achieve the above-mentioned purpose, one or more embodiments of the utility model provide a cleaning device with a liftable roller brush, comprising a main body, wherein the main body is provided with a bracket and a roller brush, and the roller brush is rotatably installed in the bracket; the main body is also provided with a driving component and a transmission component for driving the bracket to swing so as to lift the roller brush, characterized in that the driving component has a rotatable driving shaft, and the transmission component includes a gear connected to the driving shaft and a rack connected to the bracket, the rack is arc-shaped, and the arc of the arc-shaped rack is consistent with the swing arc of the bracket, the center of the circle where the arc-shaped rack is located is located on the swing axis of the bracket, the gear is meshed with the arc-shaped rack for transmission, and the gear rotates synchronously with the driving shaft.

[0007] Furthermore, the bracket has a swing side away from the swing axis, the arc-shaped rack is fixed on the swing side of the bracket, and the gear is driven by a driving shaft.

[0008] Furthermore, the bracket includes a frame portion and an arc portion, the axial direction of the arc portion is parallel to the swing axis of the bracket, the arc-shaped rack is fixed inside the arc portion, and the roller brush is rotatably installed in the frame of the frame portion.

[0009] Furthermore, the arcuate rack and the arcuate portion have the same curvature, and their end surfaces along the circumferential direction are located in the same plane.

[0010] Furthermore, the lower surface of the main body has a bottom plate, the bottom plate has a through groove penetrating the bottom plate in the up-down direction, the frame part and the roller brush are accommodated in the through groove, and the driving assembly is fixed on the upper surface of the bottom plate.

[0011] Furthermore, both ends of the arc-shaped rack are provided with limit members; or, a detection member is provided between the gear and the arc-shaped rack or between the bracket and the main body for detecting the degree of lifting and lowering of the bracket.

[0012] Furthermore, the bracket has a cantilever on one side away from the driving assembly, the extension direction of the cantilever is perpendicular to the rotation axis of the roller brush, the cantilever is rotationally connected to the main body, and the rotation center axis of the cantilever coincides with the swing axis of the bracket.

[0013] Furthermore, a support is installed at the main body, and one end of the cantilever away from the driving assembly is rotatably connected to the support.

[0014] Furthermore, the bracket is provided with a driving assembly and a transmission assembly at both ends along the axis direction of the roller brush.

[0015] Furthermore, the roller brush can have a lifting working state, a cleaning working state and a pressing working state through the driving of the driving component and the transmission component; in the lifting working state, the roller brush is higher than the surface to be cleaned; in the cleaning working state, the roller brush can press the surface to be cleaned with a first pressure, and in the pressing working state, the roller brush can press the surface to be cleaned with a second pressure greater than the first pressure.

[0016] Beneficial effects of one or more of the above technical solutions:

[0017] In this solution, the driving assembly has a rotatable driving shaft, and the transmission assembly includes a gear connected to the driving shaft and a rack connected to the bracket. The rack is arc-shaped and the center of the circle is located on the swing axis of the bracket. The gear and the rack are meshed and transmitted, and the gear rotates synchronously with the driving shaft. In this setting method, the rotating driving assembly and the gear rack are used to cooperate, and the rotational motion of the driving shaft is directly converted into the swing of the bracket through the gear and the arc-shaped rack transmission. The arc of the arc-shaped rack is consistent with the swing arc of the bracket, so that the transmission assembly is more stable during the transmission process, and the bracket is not easy to shake. There is no active gap between the bracket of the cleaning assembly and the driving assembly, which is convenient for improving the stability of the transmission between the driving assembly, the transmission assembly, the bracket and other cleaning components, thereby ensuring the stability of the entire roller brush when it is raised and lowered.

[0018] In addition, in this solution, the driving component is a rotational motion, and the transmission component is the meshing of a gear and an arc-shaped rack; this setting does not require the conversion of rotational motion into linear motion, which facilitates reducing the space occupied by the driving component and the transmission component and improving the utilization rate of the internal space of the main body.

[0019] By setting limiters at both ends of the arc-shaped rack, the lifting height of the bracket can be limited, and the gear and the arc-shaped rack can be prevented from being disengaged. A detection piece is set to detect the lifting height of the bracket. The number of detection pieces can be set as needed, so that the bracket has different adjustment heights. In different cleaning modes, the bracket is raised and lowered to different heights to achieve different downward pressure effects. For example, in a kitchen with stubborn dirt, the roller brush can be adjusted to the maximum downward pressure height for strong cleaning; in a relatively clean bedroom, the roller brush can be adjusted to a moderate height for ordinary cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Some embodiments of the present application are described below with reference to the accompanying drawings, in which:

[0021] Figure 1 It is an axonometric diagram of the overall structure in Embodiment 1 of the present utility model;

[0022] Figure 2 It is an axonometric diagram of the structure of the bracket and roller brush in the embodiment of the utility model;

[0023] Figure 3 yes Figure 2 A schematic diagram of the structure of part A in the middle;

[0024] Figure 4 It is an axonometric diagram of a drive assembly arranged at a bracket in an embodiment of the utility model;

[0025] Figure 5 It is an axonometric diagram of the bottom plate and roller brush and other parts of the structure in the embodiment of the utility model;

[0026] Figure 6 It is an axonometric diagram of the overall structure in Example 2 of the utility model.

[0027] Figure numerals: 1. main body; 2. anti-collision plate; 3. bracket; 31. cantilever; 32. frame part; 33. bearing seat; 4. roller brush; 5. arc-shaped part; 6. transmission assembly; 61. gear; 62. arc-shaped rack; 63. drive shaft; 7. bottom plate; 701. through groove; 8. support; 9. fuselage; 10. floor brush; 12. walking wheel. DETAILED DESCRIPTION

[0028] Those skilled in the art should understand that the embodiments described below are merely preferred embodiments of the present application, which are merely used to explain the technical principles of the present application and are not used to limit the protection scope of the present application.

[0029] It should be noted that in the description of this application, the terms "center", "upper", "lower", "top", "bottom", "vertical", "horizontal", "inner", "outer" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] Example 1

[0032] The present embodiment provides a cleaning device with a liftable roller brush, comprising a main body, wherein the main body is provided with a bracket and a roller brush, and the roller brush is rotatably installed in the bracket; the main body is also provided with a driving component and a transmission component for driving the bracket to swing so as to lift and lower the roller brush, the driving component having a rotatable driving shaft, the transmission component comprising a gear connected to the driving shaft and a rack connected to the bracket, the rack being arc-shaped, and the arc of the arc-shaped rack is consistent with the swing arc of the bracket, the center of the circle where the arc-shaped rack is located is located on the swing axis of the bracket, the gear is meshed with the arc-shaped rack for transmission, and the gear rotates synchronously with the driving shaft.

[0033] See also Figure 1-Figure 5As shown, a cleaning device with a roller brush that can be raised and lowered provided in this embodiment includes a main body 1, the main body 1 is provided with a bracket 3 and a roller brush 4, the roller brush 4 is rotatably installed in the bracket 3, and the rotation axis of the roller brush 4 in the bracket 3 is a first axis. The main body 1 is also provided with a driving assembly and a transmission assembly 6 for driving the bracket 3 to swing so as to raise and lower the roller brush 4, the swing axis of the bracket 3 is a second axis, the driving assembly has a rotatable driving shaft 63, and the transmission assembly 6 includes a gear 61 connected to the driving shaft 63 and a rack connected to the bracket 3, the rack is arc-shaped, and the arc of the arc-shaped rack is consistent with the swing arc of the bracket, the center of the circle where the arc-shaped rack is located is located on the swing axis of the bracket 3, the gear 61 is meshed with the arc-shaped rack for transmission, and the gear 61 rotates synchronously with the driving shaft 63.

[0034] Specifically, the axial direction of the rotating shaft in the driving assembly, the axial direction of the gear 61 , the first axial direction, and the second axial direction are parallel to each other.

[0035] In this embodiment, the drive assembly and the transmission assembly 6 are arranged at the end of the bracket 3 along the direction parallel to the first axis. At this time, the drive assembly and the transmission assembly 6 will not occupy the space above the bracket 3 and inside the main body 1, which is beneficial to reducing the space occupied by the drive assembly and the transmission assembly 6 in the upper and lower directions of the main body 1, and making full use of the characteristics of the main body 1 being thinner in the upper and lower directions and larger in the horizontal direction, thereby improving the space utilization rate inside the main body 1.

[0036] In the present embodiment, the transmission member includes a gear 61 connected to the drive shaft 63 and an arc-shaped rack 62 connected to the bracket 3. This arrangement converts the rotational motion of the drive shaft 63 in the drive assembly into the swinging of the bracket 3. Compared with the method of directly fixing the drive shaft 63 to the rotating shaft at the bracket 3, the present embodiment facilitates the use of the gear 61 and the rack to reduce the torque requirement of the drive assembly for the swinging of the bracket 3, thereby reducing the power and size requirements of the drive assembly for the swinging of the bracket 3, making it easier to realize the miniaturized design of the drive assembly and save the internal space of the main body 1.

[0037] In addition, compared with the prior art method of arranging the drive assembly and transmission assembly 6 above the bracket 3, when the roller brush 4 is raised to the limit position, the distance between the highest end of the bracket 3 and the bottom surface of the main body 1 is D1, and the distance between the highest end of the drive assembly and transmission assembly 6 and the lowest end is D2. The maximum value of the vertical space occupied by the drive assembly and the bracket 3 in the main body 1 is approximately the sum of D1 and D2. In this embodiment, the drive assembly and transmission assembly 6 are arranged at the end of the bracket 3 along the direction parallel to the first axis. In this arrangement, when the distance between the highest end of the bracket 3 and the bottom surface of the main body 1 is D1, the distance between the drive assembly and transmission assembly 6 and the bottom surface of the main body 1 is D3 and D1. At this time, the vertical height occupied by the bracket 3 and the drive assembly and transmission assembly 6 in the main body 1 space is the larger value of D1 and D3, but it will be much smaller than the sum of D1 and D2 in the above-mentioned prior art. That is to say, this embodiment can effectively reduce the vertical height occupied by the transmission assembly 6 and the drive assembly inside the main body 1, and can fully utilize the characteristics of the main body 1 being thin in thickness and large in horizontal dimension, which is conducive to realizing the miniaturized design of the main body 1.

[0038] Specifically, the bracket 3 is rotatably connected to the roller brush 4 via a bearing seat 33. The roller brush 4 has the above-mentioned bearing seats 33 at both ends along its own axial direction, and the bearing seats 33 are fixed to the upper surface of the bracket 3.

[0039] In this embodiment, the cleaning device is a sweeping and mopping robot, the main body 1 is generally disc-shaped, and the lower part of the main body 1 is provided with a running wheel and a guide wheel, the running wheel can be driven by a power source to drive the entire main body 1 to move, and the guide wheel can rotate around a vertical axis to change the movement direction of the entire main body 1. Correspondingly, the roller brush 4 is arranged in the area between the running wheel and the guide wheel, and the rotation axis of the roller brush 4 is parallel to the rotation axis of the running wheel. More specifically, the first axis direction of the swing of the bracket 3 is perpendicular to the rotation axis direction of the running wheel.

[0040] Specifically, the main body 1 includes an upper shell and a lower shell, and an installation cavity is enclosed between the upper shell and the lower shell. The installation cavity is provided with components such as a driving circuit board, a water tank and a battery. The water tank supplies water to the roller brush 4 through a water supply pipeline. The wet state of the roller brush 4 facilitates its infiltration into the surface to be cleaned, thereby improving the cleaning efficiency of the roller brush 4. More specifically, an anti-collision plate 2 is provided on the outer wall of the main body 1, and the anti-collision plate 2 is arranged around the main body 1.

[0041] Correspondingly, at least a part of the structure of the roller brush 4 can be lifted up to be accommodated by the installation cavity, the driving assembly and the transmission assembly 6 are arranged inside the installation cavity, and the driving assembly is supported by the lower shell.

[0042] In this embodiment, the rack is fixed on the side of the bracket 3 away from the second axis, and the gear 61 is driven by the drive shaft 63. Specifically, the drive shaft 63 and the gear 61 are coaxially fixed. Figure 2 and Figure 3 , the rack and gear 61 can be arranged at the end of the bracket 3 away from the second axis (this end is defined as the distal end of the bracket 3). At this time, the gear 61 in the transmission assembly 6 serves as the force-applying end, and the distance between the rotation axis of the gear 61 and the second axis is L1, and the distance between the rotation axis of the roller brush 4 (i.e., the first axis) and the second axis is L2. At this time, L1 is greater than L2. In the process of using the gear 61 to drive the bracket 3 to swing, the force arm of the driving force applied by the gear 61 is greater than the force arm length of the resistance applied by the roller brush 4, which makes it easier to form a labor-saving lever using the gear 61 and the rack. In some other embodiments, the rack and gear 61 can be arranged between the distal end of the bracket 3 and the first axis. As long as L1 is greater than L2, the effect of a labor-saving lever can be achieved.

[0043] The drive assembly in this embodiment adopts a rotary motor, which can be a stepper motor or a reduction motor. In some other embodiments, the drive assembly can also be replaced by a pneumatic motor or other drive member capable of achieving a rotary power output. However, no matter what form the drive assembly adopts, it should have a drive shaft 63 that applies a rotational torque to the gear 61.

[0044] As mentioned above, the drive assembly and the transmission assembly 6 are used to drive the bracket 3 to swing. It should be pointed out that the swing of the bracket 3 refers to the reciprocating rotation of the bracket 3 in a small range around the first axis, and the center point of the swing is the extension direction of the bracket 3 parallel to the bottom surface of the main body 1. When the end of the bracket 3 away from the first axis swings to the highest point, the roller brush 4 is lifted to the highest state, and the roller brush 4 is out of contact with the surface to be cleaned, so that the main body 1 can move quickly along the surface to be cleaned; when the end of the bracket 3 away from the first axis swings to the lowest point, the roller brush 4 is moved down to the lowest state, at which time the roller brush 4 is compressed to the greatest extent, and the friction between the roller brush 4 and the surface to be cleaned is at the maximum value, which is convenient for cleaning the surface to be cleaned with a larger degree of dirt.

[0045] In this embodiment, the transmission assembly 6 includes a gear 61 and an arc-shaped rack 62 that mesh with each other, the center of the arc-shaped rack 62 coincides with the first axis, the arc-shaped rack 62 is fixed to the bracket 3, and the gear 61 is driven by the driving shaft 63. Specifically, the position of the gear 61 inside the main body 1 (i.e., the above-mentioned installation cavity) is relatively fixed, and the position of the arc-shaped rack 62 in the installation cavity of the main body 1 rotates around the first axis as the gear 61 rotates. When the gear 61 and the arc-shaped rack 62 mesh with each other until the gear 61 and the arc-shaped rack 62 are in contact at the lowest point, the arc-shaped rack 62, the bracket 3, and the roller brush 4 are at the highest point; when the gear 61 and the arc-shaped rack 62 mesh with each other until the gear 61 and the arc-shaped rack 62 are in contact at the highest point, the arc-shaped rack 62, the bracket 3, and the roller brush 4 are in a working state at the lowest point.

[0046] In this embodiment, the bracket 3 includes a frame portion 32, the axial direction of the arc portion 5 is parallel to the second axis, the inner side of the arc portion 5 is fixed with a rack, and the roller brush 4 is rotatably installed in the frame of the frame portion 32. This arrangement can use the arc portion 5 to support the arc rack 62, and improve the stability of the arc rack 62 in the internal space of the main body 1; and the arc portion 5 is convenient to surround and cover part of the space outside the roller brush 4, thereby realizing the separation of the space where the roller brush 4 is located from the internal space of the main body 1, and reducing the mutual interference between the roller brush 4 and other structures in the internal space of the main body 1.

[0047] In this embodiment, the arc-shaped rack 62 and the arc-shaped portion 5 have the same curvature, and the end surfaces of the two along the circumferential direction are in the same plane. This arrangement makes it easy to use the arc-shaped portion 5 to achieve uniform support of the arc-shaped rack 62 along the arc surface direction, thereby improving the stability of the arc-shaped rack 62 inside the main body 1; at the same time, the arc-shaped portion 5 can occupy as little space as possible inside the main body 1 on the basis of supporting the arc-shaped rack 62.

[0048] Specifically, the arc portion 5 is an arc plate. The arc plate may be provided with a plurality of hollow holes, thereby facilitating the reduction of the weight of the arc plate. In some other embodiments, the arc plate may be a solid plate without the above-mentioned hollow holes.

[0049] In this embodiment, the lower surface of the main body 1 has a bottom plate 7, and the bottom plate 7 has a through groove 701 penetrating the bottom plate 7 in the up-down direction. The frame portion 32 and the roller brush 4 are accommodated in the through groove 701, and the driving assembly is fixed on the upper surface of the bottom plate 7.

[0050] Specifically, the bottom plate 7 can be fixed to the main body 1 by a snap-fitting method, or can be fixed to the main body 1 by other methods such as bolt connection. Correspondingly, in order to achieve the flushness of the lower surface of the bottom plate 7 and the lower surface of the main body 1, it is necessary to set an upwardly concave groove at the lower part of the main body 1, and embed the bottom plate 7 in the groove. This arrangement forms a special bottom plate 7 at the main body 1 to install the frame part 32 of the bracket 3 and the roller brush 4, which facilitates the synchronous disassembly and assembly of the roller brush 4 and the bracket 3 at the bottom plate 7, so as to achieve rapid cleaning and maintenance and replacement of the roller brush 4 and the drive assembly.

[0051] In this embodiment, the frame portion 32 is a rectangular frame, and the through slot 701 is a rectangular slot. This arrangement enables the through slot 701 to adapt to the structural feature of the roller brush 4 in which the vertical projection is a rectangle, thereby increasing the space occupancy rate of the roller brush 4 in the through slot 701, and supporting the roller brush 4 while keeping the structural size of the frame portion 32 as small as possible, thereby helping to reduce the space occupied by the bracket 3 and the roller brush 4 in the main body 1, and facilitating the miniaturization design of the main body 1.

[0052] As another structural form, the frame portion 32 and the through slot 701 may also be other structural forms, for example, the frame portion 32 is a regular hexagonal frame or a circular frame; correspondingly, the through slot 701 is a regular hexagonal through slot 701 and a circular through slot 701.

[0053] In this embodiment, the side of the bracket 3 away from the driving assembly has a cantilever 31, the extension direction of the cantilever 31 is perpendicular to the first axis, the cantilever 31 is rotationally connected to the main body 1, and the rotation center axis of the cantilever 31 coincides with the swing axis of the bracket 3.

[0054] Preferably, the cantilever 31 here is a long straight rod, one end of the cantilever 31 is fixed to the frame portion 32 of the bracket 3, and the other end is rotatably connected to the main body 1. In some other embodiments, the cantilever 31 can also be an arc-shaped or L-shaped structure, which can be set by those skilled in the art. This arrangement can make the distance between the first axis and the drive assembly and the transmission assembly 6 sufficiently far without significantly increasing the width of the bracket 3 in the direction perpendicular to the first axis, thereby facilitating the reduction of the driving force required for the swing of the bracket 3 and the lifting of the roller brush 4 by increasing the rotating force arm of the bracket 3, reducing the power and size requirements of the drive assembly, and facilitating the miniaturization of the drive assembly.

[0055] Preferably, both ends of the arc-shaped rack 62 are provided with limit members; or, a detection member is provided between the gear 61 and the arc-shaped rack 62 or between the bracket 3 and the main body 1 for detecting the lifting degree of the bracket 1.

[0056] In this embodiment, limiters are provided at both ends of the arc-shaped rack 62 to limit the lifting height of the bracket 1 and prevent the gear 61 from being disengaged from the arc-shaped rack 62. A detection member is provided between the gear 61 and the arc-shaped rack 62 or between the bracket and the main body to detect the lifting height of the bracket 1. The number of detection members can be set as needed, such as 2, 3, 4, 5, etc., arranged at intervals along the arc direction of the arc-shaped rack 62, so that the bracket has different adjustment heights. In different cleaning modes, the bracket 1 is raised and lowered to different heights, thereby achieving different downward pressure effects. For example, in a kitchen with stubborn dirt, the roller brush can be adjusted to the maximum downward pressure height for strong cleaning; in a relatively clean bedroom, the roller brush can be adjusted to a moderate height for ordinary cleaning.

[0057] In this embodiment, the detection member may include a travel switch and a trigger member. Between the gear 61 and the arc-shaped rack 62, or between the bracket 3 and the main body 1, one is provided with a travel switch, and the other is provided with a trigger member. Multiple detection members are evenly arranged along the height of the roller brush, and each detection member represents a height, so that the lifting height of the roller brush can be detected. The detection member can also be an infrared transceiver. A light shield is provided on the arc-shaped rack 62 or the bracket 3. The transmitting end and the receiving end of the infrared transceiver are respectively arranged on different sides of the light shield. Multiple infrared transceivers are evenly arranged along the height of the roller brush, and each infrared transceiver represents a height, so that the lifting height of the roller brush can be detected. The detection member can also be in other forms, which are not limited by this application.

[0058] See also Figure 2 In this embodiment, two cantilevers 31 are arranged at the bracket 3, and the two cantilevers 31 are evenly arranged at both ends of the bracket 3 along the axis direction of the roller brush 4. In other embodiments, the number of cantilevers 31 can also be single; or the number of cantilevers 31 can be more than two, and the spacing between the multiple cantilevers 31 is the same.

[0059] In this embodiment, a support 8 is installed at the main body 1, and one end of the cantilever 31 away from the driving assembly is rotatably connected to the support 8. Specifically, a rotating shaft is fixed to the cantilever 31, and a mounting hole is provided at the support 8, and a bearing is provided in the mounting hole, and the rotating shaft is rotatably connected to the support 8 through the bearing.

[0060] In this embodiment, the bracket 3 is provided with a driving assembly and a transmission assembly 6 at both ends along the axis direction of the roller brush 4. This arrangement makes it easy to apply a driving force to the two ends of the bracket 3 to drive the bracket 3 to rotate around the first axis, thereby improving the uniformity of the force on the bracket 3 and further improving the smoothness of the roller brush 4 when it is raised and lowered. Specifically, the driving assembly and the transmission assembly 6 at both ends of the roller brush 4 are arranged symmetrically about the cross section of the roller brush 4 passing through its own center point. In some other structural forms, without considering the uniform driving of the roller brush 4 and both ends of the bracket 3, a set of transmission assemblies 6 and driving assemblies can also be provided at only one end of the roller brush 4.

[0061] In this embodiment, the roller brush 4 can have an upward working state, a cleaning working state and a downward pressing working state through the driving of the driving component and the transmission component 6; in the upward working state, the roller brush 4 is higher than the surface to be cleaned; in the cleaning working state, the roller brush 4 can press the surface to be cleaned with a first pressure, and in the downward pressing working state, the roller brush 4 can press the surface to be cleaned with a second pressure greater than the first pressure. This setting method facilitates the use of the lifting and lowering of the roller brush 4 to adapt it to different working scenes, and can facilitate the cleaning of the floors with different degrees of dirt by the roller brush 4, and facilitates the separation of the roller brush 4 from the surface to be cleaned in the non-cleaning state, so as to reduce the friction between the cleaning device and the surface to be cleaned, so that the main body 1 moves quickly.

[0062] Example 2

[0063] The structural arrangement of this embodiment is basically the same as that of Embodiment 1, except that the cleaning device in this embodiment is a floor scrubber instead of the sweeping and mopping robot in Embodiment 1.

[0064] like Figure 6 As shown, the main body is a floor brush 10 in the floor scrubber, the rear of the floor brush 10 is pivotally connected to the lower part of the body 9, and a control handle is provided at the upper end of the body 9. The floor scrubber is provided with a sewage bucket and a clean water tank, which can provide clean water to the roller brush 4 through a water supply pipeline to wet the brush surface, and the sewage bucket is used to match the suction assembly to suck the dirt scraped by the roller brush 4 into the inner cavity of the sewage bucket for storage.

[0065] The lower surface of the floor brush 10 has the roller brush 4 , which is located at the front of the floor brush 10 , and the rear of the floor brush 10 is provided with a travel wheel 12 .

[0066] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments of the foregoing text, but it is easy for those skilled in the art to understand that the protection scope of the present application is not limited to the above preferred embodiments. Without departing from the technical principles of the present application, those skilled in the art may split and combine the technical solutions in the above preferred embodiments, and may also make equivalent changes or replacements to the relevant technical features, and any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present application will fall within the protection scope of the present application.

Claims

1. A cleaning device with a lifting roller brush, comprising a main body, the main body is provided with a bracket and a roller brush, the roller brush is rotatably installed in the bracket; the main body is also provided with a driving assembly and a transmission assembly for driving the bracket to swing so as to lift the roller brush, characterized in that: The driving assembly has a rotatable driving shaft, and the transmission assembly includes a gear connected to the driving shaft and a rack connected to the bracket, the rack is arc-shaped, and the arc of the arc-shaped rack is consistent with the swing arc of the bracket, the center of the circle where the arc-shaped rack is located is located on the swing axis of the bracket, the gear is meshed with the arc-shaped rack for transmission, and the gear rotates synchronously with the driving shaft.

2. The cleaning device with a retractable roller brush according to claim 1, characterized in that: The bracket has a swing side away from the swing axis, the arc-shaped rack is fixed on the swing side of the bracket, and the gear is driven by a driving shaft.

3. The cleaning device with a retractable roller brush according to claim 1, characterized in that: The bracket comprises a frame part and an arc-shaped part, the axial direction of the arc-shaped part is parallel to the swing axis of the bracket, the arc-shaped rack is fixed inside the arc-shaped part, and the roller brush is rotatably installed in the frame of the frame part.

4. The cleaning device with a retractable roller brush according to claim 3, characterized in that: The arc-shaped rack and the arc-shaped portion have the same curvature, and the end surfaces of the two along the circumferential direction are in the same plane.

5. The cleaning device with a retractable roller brush according to claim 3, characterized in that: The lower surface of the main body is provided with a bottom plate, the bottom plate is provided with a through slot penetrating the bottom plate in the up-down direction, the frame part and the roller brush are accommodated in the through slot, and the driving assembly is fixed on the upper surface of the bottom plate.

6. The cleaning device with a retractable roller brush according to claim 1, characterized in that: Limiting members are provided at both ends of the arc-shaped rack; or, a detection member is provided between the gear and the arc-shaped rack or between the bracket and the main body, for detecting the degree of lifting and lowering of the bracket.

7. The cleaning device with a retractable roller brush according to claim 1, characterized in that: One side of the bracket is provided with a cantilever, the extension direction of the cantilever is perpendicular to the rotation axis of the roller brush, the cantilever is rotationally connected to the main body, and the rotation center axis of the cantilever coincides with the swing axis of the bracket.

8. The cleaning device with a retractable roller brush according to claim 7, characterized in that: A support is installed at the main body, and one end of the cantilever away from the roller brush is rotatably connected to the support.

9. The cleaning device with a retractable roller brush according to claim 1, characterized in that: The drive assembly and the transmission assembly are arranged at both ends of the bracket along the axis direction of the roller brush.

10. The cleaning device with a retractable roller brush according to claim 1, characterized in that: The roller brush has an upward working state, a cleaning working state and a downward working state through the driving of the driving component and the transmission component; In the lifting working state, the roller brush is higher than the surface to be cleaned; in the cleaning working state, the roller brush can press the surface to be cleaned with a first pressure, and in the pressing working state, the roller brush can press the surface to be cleaned with a second pressure greater than the first pressure.

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