Swimming pool cleaning robot

Abstract

The application provides a pool cleaning robot, which comprises a cleaning body, a water inlet and a water outlet separated from the water inlet, a driving gear rotatably arranged on the cleaning body, a second gear segment engaged with the driving gear, and a cleaning roller brush mechanism comprising a roller brush body and a roller brush gear, wherein the roller brush gear is connected to the roller brush body and engaged with the second gear segment, and when the driving gear rotates, the second gear segment is driven to rotate to drive the roller brush gear and the roller brush body to rotate relative to the cleaning body. The pool cleaning robot provided by the application can improve the cleaning efficiency of the pool cleaning robot.

Description

[0001] Cross-referencing

[0002] This application claims priority to U.S. Application No. 17 / 901,742, filed September 1, 2022, entitled “ROBOTIC POOL CLEANER”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of cleaning device technology, and more particularly to a swimming pool cleaning robot. Background Technology

[0004] Pool cleaning robots are designed to meet the needs of pool cleaning. They can repeatedly clean the pool bottom and walls, as well as filter the pool water. During operation, a drive motor propels the robot across the pool surface, where a roller brush cleans away contaminants.

[0005] The existing method of driving the roller brush and the moving mechanism of the pool cleaning robot is to achieve the same result by having the roller brush and the drive motor mesh with the moving mechanism respectively. This driving method requires high machining precision and results in low moving efficiency of the pool cleaning robot during use, which leads to greater wear on the roller brush and a shorter lifespan, thus increasing the operating cost of the pool cleaning robot. Utility Model Content

[0006] To address the aforementioned problems, embodiments of this application provide a pool cleaning robot that at least partially solves these problems.

[0007] A swimming pool cleaning robot according to an embodiment of this application includes: a cleaning body, including an inlet and an outlet separate from the inlet; a drive gear, rotatably mounted on the cleaning body; a second tooth segment, meshing with the drive gear; and a cleaning roller brush mechanism, including a roller brush body and a roller brush gear; the roller brush gear is connected to the roller brush body and meshes with the second tooth segment, wherein when the drive gear rotates, it drives the second tooth segment to rotate, thereby causing the roller brush gear and the roller brush body to rotate relative to the cleaning body.

[0008] Optionally, a shaft is provided on the cleaning body, and the second toothed segment is sleeved on the shaft.

[0009] Optionally, the pool cleaning robot also includes a drive wheel connected to the cleaning body. The drive wheel includes a first external gear ring, which includes a first tooth segment. The first tooth segment meshes with a drive gear, and when the drive gear rotates, the drive wheel is driven to rotate through the first tooth segment.

[0010] Optionally, the first tooth segment and the second tooth segment are arranged sequentially along the axial direction of the drive wheel from the side facing the cleaning body.

[0011] Optionally, the second tooth segment is configured to rotate relative to the first tooth segment, the brush gear meshes externally with the second tooth segment, and when the drive wheel rotates, the second tooth segment rotates in the opposite direction to the first tooth segment, thereby driving the brush gear to rotate in the same direction as the drive wheel.

[0012] Optionally, the pool cleaning robot also includes a transition gear, with the first tooth segment meshing with the drive gear via the transition gear.

[0013] Optionally, the first transmission ratio between the drive gear and the drive wheel is less than a first set value.

[0014] Optionally, the second transmission ratio between the drive gear and the cleaning roller brush mechanism can be 1:1.

[0015] Optionally, the inlet is for sucking up liquids and / or contaminants in the pool, and the inlet is located behind the cleaning roller brush mechanism in the direction of travel of the pool cleaning robot.

[0016] Optionally, the rotation direction of the roller brush body is used to push liquid and / or contaminants toward the inlet.

[0017] Optionally, the pool cleaning robot also includes a track, and the drive wheel has a second external gear ring. The diameter of the first external gear ring is smaller than the diameter of the second external gear ring, and the first and second external gear rings are coaxially arranged. The track is fitted onto the drive wheel and meshes with the second external gear ring.

[0018] Optionally, the pool cleaning robot also includes a driven wheel, which is spaced apart from the drive wheel on the cleaning body and can rotate relative to the cleaning body. The driven wheel includes a third external gear ring, and the inner surface of the track is provided with multiple mating teeth. The track is sleeved on the drive wheel and the driven wheel, and the mating teeth mesh with the second external gear ring and the third external gear ring respectively.

[0019] The drive motor of this pool cleaning robot serves as the power source for the drive wheel assembly and the cleaning roller brush mechanism, causing the drive wheels of the drive wheel assembly to move, thereby moving the cleaning unit within the pool. This allows the cleaning unit to clean contaminants in the pool during movement, achieving cleaning and purification of the pool. Because the drive gear and the cleaning roller brush mechanism are connected via a second tooth segment, assembly is simpler and more convenient, and the requirements for machining precision are reduced, thus lowering manufacturing costs. Attached Figure Description

[0020] The accompanying drawings are intended only to illustrate and explain this application and do not limit the scope of this application.

[0021] Figure 1 This is a first-person perspective, three-dimensional partial explosion diagram of a swimming pool cleaning robot according to an embodiment of this application.

[0022] Figure 2 This is a second-view perspective three-dimensional structural diagram of the pool cleaning robot according to an embodiment of this application.

[0023] Figure 3 This is a third-person perspective, three-dimensional partial explosion diagram of a pool cleaning robot according to an embodiment of this application.

[0024] Figure 4 This is a partial exploded view of the pool cleaning robot according to an embodiment of this application.

[0025] Figure 5 This is a three-dimensional partially exploded view of another swimming pool cleaning robot according to an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Pool cleaning robot; 10. Cleaning body; 10a. Outlet; 16. Shaft; 171. Bearing; 172. Support rod; 110. Upper shell; 120. Movable flip cover; 130. Bottom shell; 20. Drive mechanism; 210. Drive wheel; 2111. First tooth segment; 2112. Second tooth segment; 212. Second external gear ring; 220. Track; 221. Mating tooth; 230. Driven wheel; 231. Third external gear ring; 240. Drive gear; 250. Transition gear; 30. Cleaning roller brush mechanism; 310. Roller brush body; 321. Roller brush gear. Detailed Implementation

[0028] To provide a clearer understanding of the technical features, objectives, and effects of the embodiments of this application, the specific implementation methods of the embodiments of this application will now be described with reference to the accompanying drawings.

[0029] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0030] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown as one or more, or only one or more are labeled.

[0031] Before describing the structure of the pool cleaning robot according to the embodiments of this application, the application scenarios of the pool cleaning robot will be briefly described in conjunction with the accompanying drawings to facilitate understanding.

[0032] This application primarily focuses on improving the drive mechanism of a pool cleaning robot to enhance its mobility and cleaning effectiveness. Before describing the structure of the drive mechanism, a brief overview of the overall structure and operation of the pool cleaning robot is provided:

[0033] Figures 1-5 The swimming pool cleaning robot 1 shown in this embodiment mainly includes a cleaning body 10, a drive mechanism 20, and a cleaning roller brush mechanism 30.

[0034] The pool cleaning robot 1 sucks in liquid and / or contaminants through its cleaning body 10. The cleaning body 10 filters the liquid and / or contaminants, leaving the contaminants inside. The filtered liquid is then discharged back into the pool, and this process is repeated to complete the filtration of the pool's liquid. A drive mechanism 20 is connected to the cleaning body 10 to drive it to move within the pool during the operation of the robot. Therefore, while the cleaning body 10 filters the liquid and / or contaminants, as it moves within the pool, the cleaning roller brush mechanism 30 cleans at least a portion of the pool surface, cleaning the pool bottom and sidewalls, thus achieving the goal of cleaning the entire pool.

[0035] The structure and working process of the pool cleaning robot according to an embodiment of this application are described below with reference to the accompanying drawings:

[0036] See Figures 1 to 4 The swimming pool cleaning robot 1 of this application embodiment filters liquids and / or contaminants in the swimming pool through a cleaning body 10. The cleaning body 10 includes a housing for mounting a drive mechanism 20 and a cleaning roller brush mechanism 30, etc. In one example, the housing may include an upper housing 110, a movable flip cover 120, and a bottom housing 130. The upper housing 110 and the bottom housing 130 are connected, and the upper housing 110 is detachable from the bottom housing 130, facilitating the cleaning or maintenance of the internal components of the cleaning robot 1. The movable flip cover 120 is connected to the upper housing 110, and the movable flip cover 120 is rotatable relative to the upper housing 110, facilitating the replacement and cleaning of the internal components of the cleaning body 10.

[0037] To suck up liquids and / or contaminants from the pool, the cleaning body 10 includes an inlet and an outlet 10a, with the outlet 10a separate from the inlet. For example, the inlet is located below the bottom shell 130 of the cleaning body 10, the outlet 10a is located on the upper shell 110, and a filter basket 140 is installed inside the cleaning body 10. Liquids and / or contaminants in the pool enter the cleaning body 10 through the inlet located at the bottom of the cleaning body 10, flow through the filter basket 140, and retain the contaminants in the filter basket. The filtered liquid flows out through the outlet of the upper shell 110 to the outside of the pool cleaning robot 1, and returns to the pool. This process is repeated to complete the cleaning and filtration of liquids and / or contaminants inside the pool.

[0038] Optionally, the inlet is equipped with a one-way valve to prevent water flowing into the pool cleaning robot 1 from flowing back out and affecting the water intake, and also to prevent internal pollutants from leaking back into the pool through the inlet.

[0039] Preferably, in the direction of travel of the pool cleaning robot 1, the aforementioned water inlet is located behind the cleaning roller brush mechanism 30. This configuration facilitates the cleaning roller brush mechanism 30 to brush up contaminants on the front side of the cleaning body 10, which are then sucked into the water inlet that catches up as the cleaning body 10 moves, and filtered through a filter basket within the cleaning body 10, thereby improving the cleaning efficiency of the pool cleaning robot 1.

[0040] Optionally, to improve the efficiency of the pool cleaning robot 1 in collecting contaminants, the rotation direction of the cleaning roller brush mechanism 30 is used to push the contaminants towards the water inlet. When the rotation direction of the cleaning roller brush mechanism 30 is consistent with the forward direction of the pool cleaning robot 10, it is easier to push the contaminants that have been brushed up towards the water inlet, further improving the cleaning efficiency of the pool cleaning robot 1.

[0041] Of course, in other ways, depending on the relative positional relationship between the cleaning roller brush mechanism 30 and the water inlet, the rotation direction of the cleaning roller brush mechanism 30 can also be opposite to the forward direction of the pool cleaning robot 1, and there is no restriction on this.

[0042] For example, in an embodiment where the rotation direction of the cleaning roller brush mechanism 30 is opposite to the forward direction of the pool cleaning robot 1, the water inlet can be located in the upper housing 110, and a suction device connected to the water inlet can be provided inside the cleaning body 10. When contaminants on the pool surface are brushed up by the cleaning roller brush mechanism 30 and pushed towards the water inlet, they can be sucked into the water inlet by the suction device. After being filtered by the filter basket 140, the contaminants are left in the filter basket 140, and the filtered liquid flows out through the water outlet to the outside of the pool cleaning robot 1, returning to the pool.

[0043] It is understood that in some embodiments of this application, water inlets may be provided simultaneously on the bottom and front sides of the cleaning body 10 to increase the collection efficiency of pollutants. In such embodiments, the cleaning roller brush mechanism 30 may be, but is not limited to, capable of reciprocating relative to the cleaning body 10, for example, switching between clockwise and counterclockwise rotation via a gear reversing mechanism, thereby performing a cleaning procedure on pollutants with relatively strong adhesion to the pool surface.

[0044] In some embodiments of this application, the water outlet of the upper housing 110 can be positioned such that the water outlet direction is substantially perpendicular to the moving plane of the pool cleaning robot 1. This allows the water outlet to provide better thrust to the pool cleaning robot 1, pressing it firmly against the bottom or side wall of the pool. This not only ensures reliability when climbing walls (i.e., moving along the side wall), but also helps the pool cleaning robot 1 absorb water to improve cleaning efficiency.

[0045] In addition, a drain outlet can be provided at the rear of the pool cleaning robot 1's casing. When the pool cleaning robot 1 is removed from the pool, the liquid inside the pool cleaning robot 1 can be drained through this drain outlet, reducing the weight of the pool cleaning robot 1 and making it easier for the user to lift the pool cleaning robot 1 out of the water.

[0046] Optionally, the drain outlet is equipped with a one-way valve. The one-way valve at the drain outlet ensures a tight seal during the operation of the pool cleaning robot 1, specifically when the inlet draws in liquid and / or contaminants from inside the pool, thus preventing the drain outlet from interfering with the robot's operation.

[0047] In this embodiment, the cleaning unit has a sealed chamber inside. This sealed chamber is formed by integrating two sealed housings. A static seal is used between the two housings to prevent water leakage.

[0048] Meanwhile, to ensure the reliability of the cleaning body 10 during movement and to protect the electrically operated components, the drive mechanism 20 includes a drive motor, drive wheels 210, tracks 220, and driven wheels 230.

[0049] The drive motor is housed within the aforementioned sealed chamber, and its output shaft extends from inside the chamber to the outside of the cleaning body 10. A dynamic seal is used between the output shaft and the sealed chamber to prevent water from entering. The output shaft passes through the housing and engages with the drive wheel 210 of the drive mechanism 20 for transmission.

[0050] In this embodiment, a drive wheel 210 is provided on each side of the cleaning body 10 in the width direction. These two drive wheels 210 move relatively independently. If the two drive wheels 210 move in the same direction and at the same speed, the pool cleaning robot 1 can move forward or backward. If the two drive wheels 210 move at different speeds or in different directions, the pool cleaning robot 1 can turn.

[0051] A track 220 is provided on the drive wheel 210. In this embodiment, the drive wheel 210 includes a first external gear ring disposed around the axis and a second external gear ring 212 disposed around the outer circumference. The second external gear ring 212 meshes with the track 220, so that the track 220 is driven by the second external gear ring 212 to move the cleaning body 10.

[0052] In the above specific implementation, the drive motor of the pool cleaning robot 1 serves as a power source, providing power to the drive wheel 210 and the cleaning roller brush mechanism 30, causing the drive wheel 210 and the track 220 to move, thereby driving the cleaning body 10 to move within the pool. Simultaneously, during the movement of the cleaning body 10, the cleaning roller brush mechanism 30 rotatably cleans contaminants from the bottom and side walls of the pool, achieving cleaning and purification of the pool.

[0053] To tension the track 220, the driven wheel 230 is rotatably mounted on the cleaning body 10. The driven wheel 230 and the drive wheel 210 are located on the same side of the cleaning body 10 and are spaced apart. The driven wheel 230 includes a third external gear ring 231, and the inner surface of the track 220 is provided with multiple mating teeth 221. When the track 220 is fitted over the drive wheel 210 and the driven wheel 230, the mating teeth 221 of the track 220 mesh with the second external gear ring 212 and the third external gear ring 231, respectively. In this way, the track 220 can be tensioned by the front and rear engagement of the drive wheel 210 and the driven wheel 230, thereby ensuring the stability of the pool cleaning robot 1 during movement.

[0054] like Figures 1 to 4 As shown, the transmission structure and transmission process of the drive wheel 210 and the cleaning roller brush mechanism 30 with the drive motor are explained.

[0055] In addition to the aforementioned cleaning body 10 and drive gear 240, the pool cleaning robot also includes a second tooth segment 2112, which meshes with the drive gear 240. The cleaning roller brush mechanism 30 includes a roller brush body 310 and a roller brush gear 321. The roller brush gear 321 is connected to the roller brush body 310 and meshes with the second tooth segment 2112. When the drive gear 240 rotates, it drives the second tooth segment 2112 to rotate, thereby causing the roller brush gear 321 and the roller brush body 310 to rotate relative to the cleaning body 10.

[0056] The pool cleaning robot 1 uses the rotation of the drive gear 240 to drive the rotation of the second tooth segment 2112, which meshes with it externally, thereby driving the rotation of the roller brush gear 321, which in turn drives the roller brush body 310 to rotate, thus achieving the cleaning of the pool surface. Because the drive gear 240 and the second tooth segment 2112 are externally meshed, and the roller brush gear 321 is also externally meshed with the second tooth segment 2112, this external meshing configuration makes assembly simpler and more convenient, and reduces the requirements for machining precision, thereby lowering manufacturing costs.

[0057] The drive wheel 210 includes a first external gear ring, which includes a first tooth segment 2111. The first tooth segment 2111 meshes with the drive gear 240. When the drive gear 240 rotates, the drive wheel 210 is driven to rotate through the first tooth segment 2111.

[0058] In some examples, such as Figure 1 As shown, a shaft 16 is provided on the cleaning body 10. The first tooth segment 2111 can be directly sleeved on the shaft 16, and the second tooth segment 2112 is sleeved on the first tooth segment 2111.

[0059] In other examples, such as Figure 5 As shown, a shaft 16 is provided on the cleaning body 10, and a second toothed segment 2112 is sleeved on the shaft 16. The shaft 16 can reliably support and position the second toothed segment 2112. A bearing 171 is provided inside the shaft 16, and a support rod 172 passes through the bearing 171. The first toothed segment 2111 can be rotatably connected to the shaft 16 through the bearing 171. The pool cleaning robot 1 is driven by the first toothed segment 2111 of the first external gear ring of the drive wheel 210 meshing with the drive gear 240 of the drive motor, which drives the second external gear ring 212 of the drive wheel 210 to rotate, thereby achieving movement. This allows the pool cleaning robot 1 to travel a greater distance by having the smaller diameter first external gear ring drive the larger diameter second external gear ring 212 to rotate within a fixed movement time, thus improving the movement efficiency of the pool cleaning robot 1 and consequently improving cleaning efficiency. Simultaneously, the cleaning roller brush mechanism 30 rolls by meshing with the second toothed segment 2112. If the rotation speed of the cleaning roller brush mechanism 30 is the same as that of the existing cleaning roller brush mechanism, thus ensuring that the cleaning effect remains unchanged, and if the movement time is the same, then the cleaning roller brush mechanism 30 will clean a greater distance as the pool cleaning robot 1 moves further, thereby increasing the utilization rate of the cleaning roller brush mechanism 30, which in turn reduces the wear of the cleaning roller brush mechanism 30 to a certain extent and extends its service life.

[0060] In some embodiments of this application, the first tooth segment 2111 of the first external gear ring of the drive wheel 210 and the second external gear ring 212 can be coaxially arranged and rigidly connected. When the drive gear 240 of the drive motor drives the first tooth segment 2111 of the first external gear ring to rotate, the second external gear ring 212 rotates coaxially with the first tooth segment 2111 of the first external gear ring at the same speed. The diameter of the first tooth segment 2111 of the first external gear ring of the drive wheel 210 is smaller than the diameter of the second external gear ring 212. This means that at the same speed, the cleaning body 10 can move a greater distance due to the longer circumference of the second external gear ring 212, thereby increasing the moving speed of the pool cleaning robot 1. With the pool area remaining unchanged, the increased moving speed of the pool cleaning robot 1 means that the time required to clean the pool once is reduced, which improves cleaning efficiency.

[0061] Furthermore, to ensure the efficiency of external transmission by the drive gear 240, specifically, the first transmission ratio between the drive gear 240 and the drive wheel 210 is less than a first set value. Here, the first transmission ratio refers to the ratio of the rotational speed of the input gear to the rotational speed of the output gear. Specifically, in this example, the first transmission ratio can be the ratio between the rotational speed of the drive gear 240 and the rotational speed of the first external gear ring. From the definition of the first transmission ratio, it is easy to see that since the rotational speed of the drive gear 240 is related to the rotational speed of the drive motor, assuming the rotational speed of the drive motor remains constant, the higher the rotational speed of the first external gear ring, the smaller the value of the first transmission ratio. In other words, the faster the rotational speed of the first external gear ring, the faster the cleaning body moves.

[0062] In one feasible approach, the first set value can be 2.5:1 (i.e. 5:2). This transmission ratio can ensure that the moving speed of the cleaning body 10 meets the requirements and does not move too slowly, and can also ensure that the cleaning effect is moderate and that the cleaning is not ineffective due to the moving speed being too fast.

[0063] In one example, the number of teeth on the drive gear 240 of the drive motor ranges from 10 to 15, for example, 13, and the number of teeth on the first tooth segment 2111 of the first external gear ring ranges from 30 to 35, for example, 32. Of course, in other examples, the first set value can be other values.

[0064] like Figure 1-3 As shown. In one embodiment of this application, the first tooth segment 2111 and the second tooth segment 2112 are sequentially arranged along the axial direction of the drive wheel 210 from the side facing the cleaning body 10. The diameter of the first tooth segment 2111 may be, but is not limited to, smaller than the diameter of the second tooth segment 2112.

[0065] The second tooth segment 2112 is configured to rotate relative to the first tooth segment 2111. The roller brush gear 321 meshes externally with the second tooth segment 2112. When the drive wheel 210 rotates, the second tooth segment 2112 rotates in the opposite direction to the first tooth segment 2111, thereby driving the roller brush gear 321 to rotate in the same direction as the drive wheel 210.

[0066] The pool cleaning robot also includes a transition gear 250, and the first tooth segment 2111 meshes with the drive gear 240 through the transition gear 250.

[0067] Among them, the driving gear 240 meshes externally with the transition gear 250 and the second tooth segment 2112, respectively, and the transition gear 250 meshes externally with the driving gear 240 and the first tooth segment 2111, respectively.

[0068] Therefore, when the drive gear 240 drives the transition gear 250 and the second tooth segment 2112 to rotate, the transition gear 250 drives the first tooth segment 2111 to rotate, which in turn drives the drive wheel 210 to rotate, and the second tooth segment 2112 drives the roller brush gear 321 to rotate. At this time, since the second tooth segment 2112 and the first tooth segment 2111 rotate in opposite directions, the rotation direction of the roller brush gear 321 is adjusted to be consistent with the rotation direction of the drive wheel 210, so that the roller brush body 310 can rotate synchronously towards the water inlet, which facilitates the water inlet to suck in pollutants for cleaning and filtration.

[0069] In one specific embodiment, the second transmission ratio between the drive gear 240 and the cleaning roller brush mechanism 30 can be 1:1. The second transmission ratio can be the ratio of the speed of the input gear to the speed of the output gear, that is, the ratio between the rotational speed of the drive gear 240 and the rotational speed of the cleaning roller brush mechanism 30. If the second transmission ratio is 1:1, it means that the rotational speed of the cleaning roller brush mechanism 30 can be relatively high to meet the cleaning requirements.

[0070] Of course, in other embodiments, the second transmission ratio can be other ratios, and there is no limitation on this.

[0071] In summary, the cleaning roller brush mechanism of the pool cleaning robot in this embodiment of the application meshes with the drive wheel, enabling the pool cleaning robot to have a high overall movement speed without reducing the rotation speed, thereby improving cleaning efficiency.

[0072] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0073] The above are merely illustrative embodiments of this application and are not intended to limit the scope of the embodiments of this application. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of the embodiments of this application should fall within the protection scope of the embodiments of this application.

Claims

1. A swimming pool cleaning robot, characterized in that, include: The cleaning body (10) includes an inlet and an outlet (10a) separate from the inlet. A drive gear (240) is rotatably mounted on the cleaning body (10); The second tooth segment (2112) meshes with the drive gear (240); and The cleaning roller brush mechanism (30) includes a roller brush body (310) and a roller brush gear (321). The roller brush gear (321) is connected to the roller brush body (310) and meshes with the second tooth segment (2112). When the drive gear (240) rotates, it drives the second tooth segment (2112) to rotate, thereby causing the roller brush gear (321) and the roller brush body (310) to rotate relative to the cleaning body (10). The pool cleaning robot also includes a drive wheel (210), which is connected to the cleaning body (10). The drive wheel (210) includes a first external gear ring, which includes a first tooth segment (2111). The first tooth segment (2111) meshes with the drive gear (240). When the drive gear (240) rotates, the drive wheel (210) is driven to rotate through the first tooth segment (2111). The cleaning body (10) is provided with a shaft (16), and the second tooth segment (2112) is sleeved on the shaft (16).

2. The pool cleaning robot according to claim 1, characterized in that, The first tooth segment (2111) and the second tooth segment (2112) are arranged sequentially along the axial direction of the drive wheel (210) from the side facing the cleaning body (10).

3. The swimming pool cleaning robot according to claim 2, characterized in that, The second tooth segment (2112) is configured to rotate relative to the first tooth segment (2111), the roller brush gear (321) meshes externally with the second tooth segment (2112), and when the drive wheel (210) rotates, the second tooth segment (2112) rotates in the opposite direction to the first tooth segment (2111), thereby driving the roller brush gear (321) to rotate in the same direction as the drive wheel (210).

4. The swimming pool cleaning robot according to claim 2, characterized in that, The pool cleaning robot also includes a transition gear (250), through which the first tooth segment (2111) meshes with the drive gear (240).

5. The pool cleaning robot according to claim 1, characterized in that, The first transmission ratio between the drive gear (240) and the drive wheel (210) is less than a first set value.

6. The pool cleaning robot according to claim 5, characterized in that, The second transmission ratio between the drive gear (240) and the cleaning roller brush mechanism (30) can be 1:

1.

7. The pool cleaning robot according to claim 1, characterized in that, The inlet is for sucking up liquids and / or contaminants in the pool, and the inlet is located behind the cleaning roller brush mechanism (30) in the direction of travel of the pool cleaning robot.

8. The pool cleaning robot according to claim 7, characterized in that, The rotation direction of the roller brush body (310) is used to push the liquid and / or the contaminants toward the water inlet.

9. The pool cleaning robot according to claim 1, characterized in that, The pool cleaning robot also includes a track (220), and the drive wheel (210) also has a second external gear ring (212). The diameter of the first external gear ring is smaller than the diameter of the second external gear ring (212), and the first external gear ring and the second external gear ring (212) are coaxially arranged. The track (220) is sleeved on the drive wheel (210) and meshes with the second external gear ring (212).

10. The pool cleaning robot according to claim 9, characterized in that, The pool cleaning robot also includes a driven wheel (230), which is spaced apart from the drive wheel (210) on the cleaning body (10) and can rotate relative to the cleaning body (10). The driven wheel (230) includes a third external gear ring (231). The inner surface of the track (220) is provided with a plurality of mating teeth (221). The track (220) is sleeved on the drive wheel (210) and the driven wheel (230), and the mating teeth (221) mesh with the second external gear ring (212) and the third external gear ring (231) respectively.

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