CN220757311U - Water tank assembly and cleaning robot - Google Patents

Abstract

The utility model discloses a water tank assembly and a cleaning robot, and relates to the field of cleaning and sweeping robots, wherein the water tank assembly comprises: the water tank main body is provided with an installation cavity at the bottom; the driving device is accommodated in the mounting cavity; the dragging and wiping assembly is in transmission connection with the driving device; the end cover is arranged between the driving device and the mopping component and covers the opening of the mounting cavity; and a seal member, at least a portion of which is sealingly engaged between the end cap and the open edge of the mounting cavity. The cleaning robot comprises the water tank assembly. This application can prevent inside steam and dust got into drive arrangement, protected drive arrangement effectively, prolonged its life to reduced the motor and because of dust, steam invade and the risk of breaking down, can also improve the efficiency of maintaining and maintaining greatly, save time and human cost, improved its reliability and persistence.

Description

Water tank assembly and cleaning robot

Technical Field

The utility model relates to the field of cleaning and sweeping robots, in particular to a water tank assembly and a cleaning robot.

Background

The cleaning robot is an intelligent household robot and aims to provide an automatic indoor cleaning service for users. The cleaning robot has the characteristics of autonomous navigation, automatic cleaning, intelligent function integration and the like, can effectively lighten the household burden of a user, improves the convenience and comfort level of family life, and mainly works for cleaning and nursing floors, including floors, carpets, tiles, wood floors and the like. It is often equipped with various cleaning modes and functions such as sweeping, dusting, mopping and mopping. The cleaning robot uses advanced sensor and navigation technology, can autonomously identify environment and obstacles, and plan a cleaning route so as to ensure comprehensive and efficient cleaning effect. In addition to the cleaning function, modern cleaning robots often have intelligent functions, such as Wi-Fi connection, APP control, voice assistant compatibility, etc., and users can control the operation of the cleaning robot through mobile phone applications or voice instructions, set cleaning plans, adjust cleaning parameters, etc. Some high-end cleaning robots can also learn the habits of the user and automatically adjust the cleaning mode and time.

Cleaning robots are designed and structured differently, but generally include a main body portion, cleaning modules, sensors, batteries, water tanks, etc., which are typically composed of bristles, wipes, dust collection ports, or spray systems, etc., to accommodate different cleaning needs, and sensors are primarily used for navigation and environmental awareness, including impact sensors, infrared sensors, laser navigation, etc. The battery supplies energy and the water tank is used for storing and supplying cleaning liquid.

The water tank of the conventional cleaning robot is generally located at the bottom of the robot, and is mainly used for storing and supplying cleaning liquid, and the water tank of the conventional cleaning robot is also equipped with a motor, and a cleaning cloth is arranged at the bottom of the water tank, and is driven to vibrate and reciprocate by the motor so as to perform cleaning operation. However, there are problems in the current water tank assembly such as poor sealing, easy water inflow to cause failure of the motor, difficulty in mounting and dismounting the motor, etc.

Disclosure of Invention

Based on the defects of difficult disassembly of a motor, poor sealing performance and the like in a water tank assembly in the existing cleaning robot, the application provides the water tank assembly and the cleaning robot.

The utility model adopts the technical scheme that: a water tank assembly comprising: the water tank main body is provided with an installation cavity at the bottom; the driving device is accommodated in the mounting cavity; the dragging and wiping assembly is in transmission connection with the driving device; the end cover is arranged between the driving device and the mopping component and covers the opening of the mounting cavity; and a seal member, at least a portion of which is sealingly engaged between the end cap and the open edge of the mounting cavity.

Further, the end cover is provided with an opening communicated with the mounting cavity, the driving device comprises a driving body and a driving shaft, the driving body is accommodated in the mounting cavity, the driving shaft passes through the opening to be connected with the mopping assembly, the sealing element is arranged around the driving shaft, and at least part of the sealing element is in sealing fit between the driving body and the end cover.

Further, the end cap and the driving device are fixed by bolts.

Further, the sealing element is clamped between the driving body and the end cover, the sealing element and the driving device are fixed through bolts.

Further, the end cover is detachably and fixedly connected with the water tank main body, and the driving device is fixed on one side of the end cover, which is away from the mopping component.

Further, the driving device comprises a driving motor, a tooth box and a transmission piece, the tooth box is arranged at the output end of the driving motor, the transmission piece is in transmission connection with the output shaft of the tooth box, and the transmission piece is also in transmission connection with the mopping component so as to drive the mopping component to reciprocate.

Further, the mop component comprises a support and a cleaning cloth, the support is movably connected with the water tank main body, the cleaning cloth is arranged at the bottom of the support, and the transmission piece is in transmission connection with the support.

Further, a first chute is arranged on the support, a sliding block is arranged at the bottom of the water tank main body, the sliding block is arranged in the first chute, and the transmission piece is eccentrically connected with the support to drive the support to slide back and forth on the sliding block.

Further, the transmission piece comprises an eccentric shaft and a bearing arranged on the eccentric shaft, a limit groove is formed in the support, the limit groove is intersected with the length direction of the first sliding groove, and the bearing is arranged in the limit groove.

The cleaning robot comprises the water tank assembly.

Compared with the prior art, the design that this application was through using end cover and sealing member has realized powerful sealing performance in the water tank subassembly, and the end cover is located the opening part of installation cavity to the sealing member is settled between end cover and other parts, can prevent steam and dust entering drive arrangement inside, and this kind of improvement of sealing performance has protected drive arrangement effectively, has prolonged its life, and has reduced the motor and has taken place the risk of trouble because of dust, steam invade. The driving device is used as an independent module and is connected with the water tank body through the end cover and the sealing element, so that the driving device can be replaced more conveniently during production, assembly and after-sale maintenance, if the driving device is required to be maintained or replaced, the end cover and the sealing element are only required to be simply disassembled, and then the whole driving device module is replaced. In addition, the improved structure of the water tank assembly can ensure the fixation and stability of the driving device, and the connection mode of the mounting cavity of the driving device and the end cover ensures that the whole structure is firmer and more reliable, thereby effectively avoiding the loosening or shifting of the driving device due to external factors and further influencing the normal operation of the cleaning robot. By ensuring the safety and stability of the driving device, the structure of the water tank assembly expands the service life of the cleaning robot and improves the reliability and durability thereof.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of a cistern assembly according to the present utility model;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;

FIG. 3 is a schematic view of an exploded view of the tank assembly of the present utility model;

fig. 4 is a schematic diagram of an exploded structure of the driving device according to the present utility model.

The main reference numerals in this application are:

1. a water tank main body; 11. a mounting cavity; 2. a driving device; 12. a liquid storage cavity; 3. a mop assembly; 4. a seal assembly; 41. an end cap; 42. a seal; 411. a fixing piece; 412. a plug body; 21. a driving motor; 22. a tooth box; 23. a transmission member; 31. a bracket; 32. a rag; 311. a first chute; 13. a slide block; 231. an eccentric shaft; 232. a bearing; 312. a limit groove; 5. a damping sleeve; 6. a chuck; 51. and a second chute.

Detailed Description

Further advantages and effects of the present application will be readily apparent to those skilled in the art from the present disclosure, by describing the embodiments of the present application with specific examples.

In the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present disclosure. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present application is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "upper," and the like, may be used herein to facilitate a description of one element or feature as illustrated in the figures as being related to another element or feature.

Although the terms first, second, etc. may be used herein to describe various elements or parameters in some examples, these elements or parameters should not be limited by these terms. These terms are only used to distinguish one element or parameter from another element or parameter. For example, a first end may be referred to as a second end, and similarly, a second end may be referred to as a first end, without departing from the scope of the various described embodiments. The first end and the second end are both at the depicted end, but they are not the same end unless the context clearly indicates otherwise. Similar situations also include the first shaft set and the second shaft set, or the first shaft joint and the second shaft joint.

Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

The application provides a water tank assembly for a cleaning robot, wherein the working mode of the cleaning robot comprises a vibration mode and a non-vibration mode, wherein the vibration mode can comprise various reciprocating actions, for example, the self-moving robot comprises a cleaning component, and the vibration mode comprises controlling the cleaning component to reciprocate back and forth, reciprocate left and right, reciprocate up and down, vibrate up and down, and the like. The vibration modes may include a strong vibration mode and a weak vibration mode, and the strong vibration mode or the weak vibration mode may be performed according to the degree of dirt in the target environment.

Referring to fig. 1, 2 and 3, the tank assembly mainly includes a tank body 1, a driving device 2, a sealing assembly 4 and a mop assembly 3, the tank body 1 is a basic structure of the entire tank assembly, has a function of storing a cleaning liquid, and the tank body 1 is generally made of a durable material such as plastic or metal.

In this embodiment, a mounting cavity 11 is formed at the bottom of the water tank body 1, the mounting cavity 11 is adjacent to a liquid storage cavity 12 of the water tank body 1, the liquid storage cavity 12 can accommodate a proper amount of cleaning agent, continuous cleaning operation is provided, a water outlet is formed in the liquid storage cavity 12, the mounting cavity 11 is used for mounting the driving device 2, and the water outlet is used for discharging cleaning liquid.

The driving device 2 is an important component of the water tank assembly and is responsible for providing a vibration function so as to realize the work of the mopping assembly 3, the driving device 2 is arranged in the mounting cavity 11, the vibration generated by the driving device 2 acts on the mopping assembly 3 through a transmission connection, the driving device 2 can be a direct current or alternating current motor, the specific model and the specification are determined according to the requirement of the cleaning robot, the mopping assembly 3 is in transmission connection with the driving device 2, the cleaning operation is carried out in the water tank body 1, the specific form of the mopping assembly 3 possibly comprises a mop capable of reciprocating, and the mopping assembly 3 can generate corresponding reciprocating motion through the action of the driving device 2 so as to carry out the effective cleaning operation.

The sealing component 4 comprises an end cover 41 and a sealing piece 42, wherein the sealing performance of the water tank component is ensured to prevent water vapor and dust from entering the driving device 2, the end cover 41 is positioned at the opening of the mounting cavity 11 and is connected with the driving device 2, the fixing and the stabilization of the driving device 2 are realized, the sealing piece 42 is arranged between the end cover 41 and the motor and between the end cover 41 and the mounting cavity 11, the effective sealing effect is realized through the cooperation between the end cover 41 and the mounting cavity 11, the end cover 41 and the sealing piece 42 of the sealing component 4 are used for protecting the driving device 2, the driving device is prevented from being invaded by the water vapor and the dust, and a good working state is kept.

The application has the advantages that: by using the design of the end cap 41 and the sealing member 42, a strong sealing performance is achieved in the water tank assembly, the end cap 41 is located at the opening of the installation cavity 11, and the sealing member 42 is arranged between the end cap 41 and other components, so that moisture and dust can be prevented from entering the inside of the driving device 2, the driving device 2 is effectively protected by the improvement of the sealing performance, the service life of the driving device is prolonged, and the risk of malfunction of the motor due to the intrusion of dust and moisture is reduced. The driving device 2 is used as an independent module and is connected with the water tank main body 1 through the end cover 41 and the sealing piece 42, so that the driving device 2 is replaced more conveniently during production, assembly and after-sale maintenance, if the driving device 2 needs to be maintained or replaced, the end cover 41 and the sealing piece 42 are simply detached, and then the whole driving device 2 module is replaced. In addition, the improved structure of the water tank assembly can ensure the fixation and stability of the driving device 2, and the connection mode of the installation cavity 11 and the end cover 41 of the driving device 2 ensures that the whole structure is firmer and more reliable, thereby effectively avoiding the loosening or displacement of the driving device 2 due to external factors and further influencing the normal operation of the cleaning robot. By ensuring the safety and stability of the driving device 2, the structure of the water tank assembly expands the service life of the cleaning robot, improving the reliability and durability thereof.

Further, as shown in fig. 3 and 4, the driving device 2 includes a driving motor 21, a gear box 22 and a transmission member 23: the driving motor 21 is a core component in the driving device 2, and usually adopts a direct current or alternating current motor, which provides a driving force source to convert electric energy into mechanical motion, the gear box 22 is positioned at the output end of the driving motor 21, the gear box 22 is provided with a set of gears to increase output torque and adjust rotation speed and steering, the transmission of driving force is realized through the intermeshing rotation of the gears, the transmission piece 23 is positioned between the output shaft of the gear box 22 and the mopping assembly 3, the driving force is transmitted to the mopping assembly 3 through the transmission connection with the mopping assembly 3, and the specific form of the transmission piece 23 can be determined according to the cleaning operation requirement, such as a rubber belt, a chain, a gear transmission and the like.

In a specific embodiment, the end cover 41 comprises a plug body 412 and fixing pieces 411, the plug body 412 is positioned in the installation cavity 11 of the water tank main body 1 and is matched with the shape of the installation cavity 11, the plug body 412 can provide a datum plane connected with the driving device 2, when in installation, the plug body 412 is embedded in the installation cavity 11, the fixing pieces 411 are clamped at the outer side of the installation cavity 11 and are used for being connected with the water tank main body 1 to ensure the stable fixation of the water tank assembly, three fixing pieces 411 are respectively arranged at the peripheral side of the plug body 412, each fixing piece 411 is provided with a threaded hole or a through hole, the fixing piece 411 is attached to the bottom surface of the water tank main body 1, and the fixing pieces 411 and the water tank main body 1 are fixedly connected through screws; the sealing element 42 is sleeved on the plug body 412, the sealing element 42 has elasticity, the sealing performance of the driving device 2 and the water tank assembly is ensured through the elasticity and the waterproof performance, after the sealing element 42 is sleeved on the plug body 412, the sealing element 42, the driving device 2 and the plug body 412 are further fixedly connected through bolts, so that the stability among the end cover 41, the sealing element 42 and the driving device 2 is ensured, the driving device 2 is stably installed on the water tank main body 1 through the connection between the plug body 412 and the sealing element 42, and the diameter of the driving device 2 is matched with the diameter of the plug body 412 and the diameter of the sealing element 42 as a part of the water tank assembly, so that tight sleeving and fixed connection are ensured.

The mop component 3 comprises a bracket 31 and a cleaning cloth 32, the cleaning cloth 32 is fixed at the bottom of the bracket 31, the bracket 31 can be designed into different shapes and structures according to specific requirements, such as transverse, longitudinal, L-shaped, U-shaped or T-shaped, etc., the design choice is to consider the mechanism and the requirement of cleaning operation and the coordination with other components, the material choice of the bracket 31 comprises metal, plastic, carbon fiber, etc., and the material choice is to consider the characteristics of strength, rigidity, weight, corrosion resistance, wear resistance, etc. of the cleaning robot so as to meet the use requirements of the cleaning robot under different environments and conditions.

The support 31 is movably connected to the water tank body 1, the bottom of the water tank body 1 is provided with the sliding block 13, and the water tank body 1 is provided with the first sliding groove 311 matched with the sliding block 13 at the bottom of the water tank body 1, the first sliding groove 311 enables the support 31 to slide reciprocally on the water tank body 1 in a preset track through the installation of the sliding block 13, the transmission piece 23 is connected with the support 31 in a transmission manner, and the transmission piece 23 is connected with the support 31 in an eccentric manner through the eccentric shaft 231 and the bearing 232 so as to drive the support 31 to slide, so that the support 31 drives the rag 32 to clean strongly. If the length direction of the first chute 311 is the same as the traveling direction of the robot, the moving direction of the bracket 31 is the left-right direction of the self-moving robot, and if the extending direction of the first chute 311 is perpendicular to the moving direction of the self-moving robot, the moving direction of the bracket 31 is the traveling direction of the self-moving robot, and of course, the extending direction of the first chute 311 can be defined differently according to different cleaning requirements, and the utility model is not limited specifically.

The method comprises the following steps: the limiting groove 312 is formed in the support 31, the limiting groove 312 is crossed with the length direction of the first sliding groove 311, the transmission piece 23 comprises an eccentric shaft 231 and a bearing 232, the bearing 232 is arranged on the eccentric shaft 231, the bearing 232 is arranged in the limiting groove 312, the sliding range of the support 31 on the sliding block 13 can be limited through the arrangement of the bearing 232, and the sliding block 13 is detachably arranged on the water tank body 1 through a screw, so that the water tank body is more convenient to replace or maintain. In other alternative embodiments, other transmission means than the connection of the eccentric shaft 231 and the bearing 232 may be used, such as chain transmission, belt transmission or gear transmission, etc., which may be selected according to the design and application requirements of the cleaning robot to achieve different forms of cleaning motion, and other forms of connection, such as pin connection, welding connection, gluing connection, etc., may be used, and selection of appropriate connection means may ensure tight connection and stability between the transmission member 23 and the bracket 31 to optimize the transmission effect and extend the service life.

The operation principle of the mopping component 3 is as follows: the bracket 31 in the mopping component 3 is movably connected with the water tank main body 1, through the combination of the sliding block 13 and the first sliding groove 311, the bracket 31 can slide on the water tank main body 1 along the horizontal direction, so that the cleaning operation can be performed at different positions and angles, a more comprehensive and thorough cleaning effect is achieved, the transmission piece 23 is eccentrically connected with the bracket 31 through the eccentric shaft 231 and the bearing 232 arranged on the transmission piece 23, the connection mode can enable the transmission piece 23 to have track offset in the driving process, so that the moving direction of the bracket 31 is changed, the rotation of the eccentric shaft 231 is converted into the sliding of the bracket 31, the bracket 31 can vibrate and swing in the sliding process, meanwhile, the friction resistance between the transmission piece 23 and the bracket 31 is reduced through the support of the bearing 232, the transmission efficiency is improved, the limit groove 312 on the bracket 31 is crossed with the length direction of the first sliding groove 311, the cross point position of the limit groove is a limit point of the sliding range, the driving device 2 is connected with the limit groove 312 on the bracket 31 through the transmission piece 23, the eccentric shaft 231 is positioned in the limit groove 312, so that the driving device 2 can synchronously drive the bracket 31 under the action of the eccentric shaft 231 in the rotating process, the reciprocating motion direction of the bracket 31 can move along the moving direction, and the sliding direction of the bracket 31 can be well defined by the sliding direction, and the sliding direction of the bracket 31 can be driven by the sliding direction, and the sliding direction of the sliding direction can be well, so that the sliding structure can realize the sliding movement of the bracket 31 can be realized.

Further, in order to provide better damping effect, the damping sleeve 5 may be further disposed on the support 31, wherein the damping sleeve 5 is embedded in the first chute 311 of the support 31, the second chute 51 is disposed in the middle of the damping sleeve 5, the second chute 51 is adapted to the first chute 311 in shape, when in installation, a protruding chuck 6 is disposed on one side of the second chute 51, the chuck 6 extends from the support 31 for a certain distance, a clamping body is disposed at the extending end of the chuck 6, the clamping body is disposed above the first chute 311, the damping sleeve 5 is embedded in the first chute 311, the chuck 6 is synchronously fastened and fixed to the damping sleeve 5 in the first chute 311, the slide block 13 is mutually matched with the second chute 51, the second chute 51 is used for placing the slide block 13 and realizing the connection with the support 31, the existence of the damping sleeve 5 can effectively reduce the transmission of vibration and impact to the support 31 and other components, the setting of the second chute 51 is reserved, the vibration and impact force in the transmission process can be absorbed and dispersed, the damage to the whole cleaning structure of the second chute 51 is reduced, and the normal sliding direction of the second chute 51 is ensured, and the whole cleaning structure of the second chute 31 is mutually matched with the second chute 51 is ensured.

In summary, the flexibility, accuracy and stability of the cleaning operation are achieved by the movable connection of the bracket 31 and the water tank body 1 in the mop assembly 3, the driving of the bracket 31 by the driving member 23 and the eccentric shaft 231, the limitation of the limiting groove 312, and the damping effect of the damping sleeve 5. These designs play an important role in improving the reliability, performance and lifetime of the cleaning robot.

The application still further provides a cleaning robot, and cleaning robot has included above-mentioned water tank subassembly.

The design of the scheme of this application fully considers the demand and the requirement of clean operation, through swing joint, stable transmission system, intelligent spacing and the shock attenuation design of support 31 and water tank main part 1 to and nimble alternative embodiment, this scheme has realized high-efficient, reliable and lasting stable clean effect. At the same time, the convenience of detachable installation also provides convenient maintenance and higher usability. Summarizing, this application solution has the important advantages and benefits of optimizing the cleaning operation, improving the performance of the cleaning robot.

The foregoing description of the preferred embodiment of the utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (10)

1. A cistern assembly, comprising:

the water tank comprises a water tank main body (1), wherein an installation cavity (11) is formed in the bottom of the water tank main body (1);

a driving device (2) accommodated in the installation cavity (11);

the mopping component (3) is in transmission connection with the driving device (2);

the end cover (41) is arranged between the driving device (2) and the mopping assembly (3), and the end cover (41) is arranged for sealing the opening of the mounting cavity (11);

-a seal (42), at least part of said seal (42) being sealingly engaged between said end cap (41) and the opening edge of the mounting cavity (11).

2. The water tank assembly according to claim 1, wherein the end cap (41) is provided with an opening communicating with the mounting cavity (11), the driving device (2) comprises a driving body and a driving shaft, the driving body is accommodated in the mounting cavity (11), the driving shaft is arranged through the opening to be connected with the mop assembly (3), the sealing member (42) is arranged around the driving shaft, and at least part of the sealing member (42) is in sealing fit between the driving body and the end cap (41).

3. A cistern assembly according to claim 1 or 2, characterized in that the end cap (41) and the drive means (2) are fastened by bolts.

4. The water tank assembly according to claim 2, wherein the seal member (42) is sandwiched between the driving body and the end cap (41), the seal member (42) and the driving device (2) are fixed by bolts.

5. A cistern assembly according to claim 1, characterized in that the end cap (41) is detachably fixedly connected to the cistern body, the drive means (2) being fixed to the side of the end cap (41) facing away from the mop assembly (3).

6. The water tank assembly according to claim 1, wherein the driving device (2) comprises a driving motor (21), a tooth box (22) and a transmission piece (23), the tooth box (22) is arranged at the output end of the driving motor (21), the transmission piece (23) is in transmission connection with the output shaft of the tooth box (22), and the transmission piece (23) is also in transmission connection with the mopping assembly (3) to drive the mopping assembly (3) to reciprocate.

7. The water tank assembly according to claim 6, wherein the mop assembly (3) comprises a bracket (31) and a cleaning cloth (32), the bracket (31) is movably connected with the water tank main body (1), the cleaning cloth (32) is arranged at the bottom of the bracket (31), and the transmission piece (23) is in transmission connection with the bracket (31).

8. The water tank assembly according to claim 7, wherein a first sliding groove (311) is formed in the support (31), a sliding block (13) is arranged at the bottom of the water tank main body (1), the sliding block (13) is arranged in the first sliding groove (311), and the transmission piece (23) is eccentrically connected with the support (31) to drive the support (31) to slide back and forth on the sliding block (13).

9. The water tank assembly according to claim 8, wherein the transmission member (23) comprises an eccentric shaft (231) and a bearing (232) arranged on the eccentric shaft (231), a limit groove (312) is arranged on the bracket (31), the limit groove (312) is intersected with the length direction of the first sliding groove (311), and the bearing (232) is arranged in the limit groove (312).

10. A cleaning robot comprising a water tank assembly according to any one of claims 1 to 9.