Sewage filtering assembly and cleaning robot

Abstract

The invention relates to a sewage filtering assembly and a cleaning robot, the sewage filtering assembly is mounted on a sewage tank, the sewage tank comprises a tank body and a cover body which are rotatably connected, the sewage filtering assembly comprises a filter screen, a support, a blow-off pipe and a traction rope which are connected, the support is connected to the tank body, and the filter screen extends into the tank body; the blow-off pipe comprises a first end and a second end which are connected with each other, the first end faces the filter screen, and the second end is connected to the box body, so that sewage can flow into the box body through the blow-off pipe and the filter screen; one end of the traction rope is connected to the first end of the blow-off pipe, the other end of the traction rope is connected to the cover body, and when the cover body is relatively far away from the box body, the traction rope can pull the first end to move in the direction far away from the filter screen. When the cover body of the sewage tank is opened, the traction rope can pull the first end to move in the direction far away from the filter screen, the sewage discharge pipe is deformed and bent under the influence of the pulling force of the traction rope, so that the first end of the sewage discharge pipe is far away from the taking-out route of the filter screen, and a user can conveniently take out the filter screen for cleaning or replacing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning, in particular to a sewage filtering assembly and a cleaning robot. BACKGROUND

[0002] In recent years, with the development of automation and artificial intelligence technology, the functions of cleaning robots are becoming more and more rich, and the intelligent degree is also becoming higher and higher. The cleaning robot generally uses water or a solution added with a cleaning agent to clean the ground, sprinkles water on the ground, then uses a brush to clean, and finally recycles the sewage through a suction mop. When the sewage tank for recycling sewage is full, the intelligent cleaning robot will return to the charging pile to drain the sewage, and the charging pile will directly drain the sewage to the sewer. In the related technology, the sewage filtering assembly of the cleaning robot usually uses a simple filter screen to cover the outlet of the sewage pipe for filtering. However, the structure of the filter screen covering the outlet of the sewage pipe may cause problems such as filter screen falling off and garbage leakage. SUMMARY

[0003] Therefore, it is necessary to provide a sewage filtering assembly and a cleaning robot for the problem of sewage filtering.

[0004] A sewage filtering assembly is installed on a sewage tank, the sewage tank comprises a box body and a cover body connected in rotation, and the sewage filtering assembly comprises:

[0005] a filter screen and a support connected in series, the support is connected to the box body, and the filter screen extends into the box body;

[0006] a sewage discharge pipe comprising a first end and a second end connected in series, the first end faces the filter screen, and the second end is connected to the box body, so that sewage can flow into the box body through the sewage discharge pipe and the filter screen;

[0007] a traction rope, one end of which is connected to the first end of the sewage discharge pipe, and the other end of which is connected to the cover body, when the cover body is relatively far away from the box body, the traction rope can pull the first end to move away from the filter screen.

[0008] The sewage filtering assembly has the filter screen extending into the box body of the sewage tank, the first end of the sewage pipe faces the filter screen, and the second end is connected to the box body. The sewage can flow into the box body through the sewage pipe and the filter screen, so that the impurities in the sewage are filtered through the filter screen. One end of the traction rope is connected to the first end of the sewage pipe, and the other end is connected to the cover body. When the cover body is relatively far away from the box body, that is, when the cover body of the sewage tank is opened, the traction rope can pull the first end of the sewage pipe to move away from the filter screen. Under the influence of the pulling force of the traction rope, the sewage pipe will deform and bend, so that the first end of the sewage pipe is away from the route of the filter screen, which is convenient for the user to take out the filter screen for cleaning or replacement. Compared with the structure of the existing sewage filtering assembly, the filter screen of the present application is connected to the box body through the bracket, and the filter screen is fixed and stable, reducing the phenomenon of filter screen falling off. Moreover, the first end of the sewage pipe is pulled by the traction rope, so that the second end is away from the filter screen, thereby facilitating the user to replace the filter screen.

[0009] In one of the embodiments, an inwardly recessed recessed area is arranged on the outer wall of the sewage pipe, and the recessed area is used to bend the sewage pipe at a preset position, wherein the preset position is at least partially located in the recessed area.

[0010] In one of the embodiments, the recessed area includes a groove and a ring groove, one end of the ring groove is connected with the end of the groove, and the other end extends along the circumference of the sewage pipe.

[0011] In one of the embodiments, a plurality of ring grooves are arranged, and the plurality of ring grooves are arranged along the length direction of the sewage pipe.

[0012] In one of the embodiments, the bracket includes a body, the body includes a connecting portion and a lapping portion connected with each other, the connecting portion is connected with the filter screen, the lapping portion is arranged around the circumference of the connecting portion, the lapping portion is lapped at the opening of the cavity of the box body, and the connecting portion and the filter screen pass through the opening and at least partially extend into the box body.

[0013] In one of the embodiments, a foolproof structure is arranged on the lapping portion.

[0014] In one of the embodiments, a magnet and a Hall sensor are further included, the filter screen is installed on the box body through the bracket, the Hall sensor is installed on the cover body, the Hall sensor is used to detect the magnetic field strength of the magnet and transmit a detection signal to the controller of the sewage tank.

[0015] In one of the embodiments, the bracket includes a body and a lug connected with each other, the body is connected with the filter screen, the lug is arranged on the side of the body away from the filter screen, and the magnet is arranged on the lug.

[0016] In one of the embodiments, a waterproof cover and a waterproof pad are further included, the waterproof pad is sleeved on the magnet, and the waterproof cover is sleeved on the lug.

[0017] The application further provides a cleaning robot comprising a sewage tank and the sewage filtering assembly.

[0018] The cleaning robot is provided with the filter screen connected to the tank through the support, and the filter screen is at least partially arranged in the cavity of the tank. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure schematic diagram of the cleaning robot provided by the embodiment of the application is shown.

[0020] Figure 2 The structure schematic diagram of the support, the filter screen and the sewage pipe installed on the tank is shown.

[0021] Figure 3 The structure schematic diagram of the sewage filtering assembly from the first perspective is shown.

[0022] Figure 4 The structure schematic diagram of the sewage filtering assembly from the second perspective is shown.

[0023] In the drawings:

[0024] 100, sewage tank; 110, tank; 120, cover;

[0025] 200, filter screen;

[0026] 300, support; 310, connecting part; 320, overlapping part; 330, fool-proof structure; 340, lug;

[0027] 400, sewage pipe; 410, recessed area; 411, groove; 412, ring groove;

[0028] 500, traction rope;

[0029] 600, magnet;

[0030] 700, waterproof cover; 710, waterproof pad;

[0031] 800, sheet metal part. DETAILED DESCRIPTION

[0032] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the spirit of the present application, and that the present application is not limited to the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0035] In the present application, unless otherwise specifically defined and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the present application, unless specifically defined and limited otherwise, if there is a description of a first feature on or above or below a second feature, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature can be above or above and above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature can be below or below and below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0038] The cleaning robot includes a sewage tank, a filter screen and a sewage pipe, the filter screen is installed at the water inlet of the sewage tank, and sewage can flow into the sewage tank through the sewage pipe and the filter screen. In the related art, the sewage filtering assembly often adopts two structures, the first is to adopt a filter box assembly formed by sheet metal or injection molding, and the second is to use a simple filter screen to cover the sewage pipe outlet for filtering. However, the first sewage filtering assembly structure has a high cost and is inconvenient to replace, and frequent clogging phenomenon can occur when it is not replaced for a long time or is not properly cleaned. The second sewage filtering assembly structure can cause the filter screen to fall off and cause garbage leakage and other problems.

[0039] The embodiment of the present application sets the traction rope 500, connects one end of the traction rope 500 to the first end of the sewage pipe 400, and connects the other end to the cover body 120. When the cover body 120 is relatively far away from the tank body 110, that is, when the cover body 120 of the sewage tank 100 is opened, the traction rope 500 can pull the first end to move away from the filter screen 200. Influenced by the pulling force of the traction rope 500, the sewage pipe 400 will deform and bend, so that the second end of the sewage pipe 400 is away from the route of the filter screen 200. At this time, it is convenient for the user to take out the filter screen 200 for cleaning or replacement.

[0040] The present application provides a sewage filtering assembly installed on the sewage tank 100, such as Figures 1 to 4As shown, the sewage tank 100 comprises a box body 110 and a cover body 120 connected rotatably, and the sewage filtering assembly comprises a filter screen 200 and a support 300 connected, a sewage pipe 400, and a traction rope 500, the support 300 is connected to the box body 110, and the filter screen 200 extends into the box body 110; the sewage pipe 400 comprises a first end and a second end connected, the first end faces the filter screen 200, and the second end is connected to the box body 110, and sewage can flow into the box body 110 through the sewage pipe 400 and the filter screen 200; one end of the traction rope 500 is connected to the first end of the sewage pipe 400, and the other end is connected to the cover body 120, and when the cover body 120 is relatively far away from the box body 110, the traction rope 500 can pull the first end to move away from the filter screen 200.

[0041] The sewage filtering assembly described above, the filter screen 200 extends into the box body 110 of the sewage tank 100, the first end of the sewage pipe 400 faces the filter screen 200, and the second end is connected to the box body 110, and sewage can flow into the box body 110 through the sewage pipe 400 and the filter screen 200, and impurities in the sewage are filtered through the filter screen 200. One end of the traction rope 500 is connected to the first end of the sewage pipe 400, and the other end is connected to the cover body 120, and when the cover body 120 is relatively far away from the box body 110, that is, when the cover body 120 of the sewage tank 100 is opened, the traction rope 500 can pull the first end to move away from the filter screen 200, and under the influence of the pulling force of the traction rope 500, the sewage pipe 400 will deform and bend, so that the second end of the sewage pipe 400 is away from the route of taking out the filter screen 200, at this time, it is convenient for the user to take out the filter screen 200 for cleaning or replacement. Compared with the first structure of the existing sewage filtering assembly, the production cost of the present application is low, and the filter screen 200 is convenient to replace. Compared with the second structure of the existing sewage filtering assembly, the filter screen 200 of the present application is connected to the box body 110 through the support 300, the filter screen 200 is fixed stably, and the phenomenon of the filter screen 200 falling off is reduced. Moreover, the first end of the sewage pipe 400 is pulled by the traction rope 500, so that the second end is away from the filter screen 200, thereby facilitating the user to replace the filter screen 200.

[0042] Specifically, as shown in Figures 1 to 4 The outer wall of the first end of the sewage pipe 400 and the cover body 120 are both provided with a connecting piece, and the end of the traction rope 500 is connected to the connecting piece. For example, the connecting piece is a ring hole with a space.

[0043] Specifically, as shown in Figures 1 to 4 The sewage pipe 400 is connected to the box body 110 through a sheet metal part 800.

[0044] In some embodiments, as Figures 1 to 4As shown, the outer wall of the sewage pipe 400 has an inwardly recessed area 410. The recessed area 410 is used to bend the sewage pipe 400 at a preset position, wherein the preset position is at least partially located within the recessed area 410. The recessed area 410 on the outer wall of the sewage pipe 400 allows the sewage pipe 400 to bend upwards along the designed recessed area 410 when the traction rope 500 pulls the second end of the sewage pipe 400 (e.g., ...). Figure 1 (As shown by the arrow), the first end of the drain pipe 400 is removed from the filter screen 200.

[0045] Specifically, in this embodiment, such as Figures 1 to 4 As shown, the recessed area 410 is located near the second end of the drain pipe 400.

[0046] In other embodiments, recessed areas 410 can also be provided in other areas of the drain pipe 400 wall, as long as it allows for directional bending of the drain pipe 400. For example, recessed areas 410 can be provided on the wall of the drain pipe 400 near the first end.

[0047] Specifically, such as Figures 1 to 4 As shown, the recessed area 410 includes a groove 411 and an annular groove 412. One end of the annular groove 412 is connected to the end of the groove 411, and the other end extends circumferentially along the drain pipe 400. When the drain pipe 400 is stretched and deformed by the external force of the traction rope 500, the drain pipe 400 is prone to bending and deforming at the groove 411 because the groove 411 is provided on the outer wall of the drain pipe 400. Furthermore, the annular groove 412 is also provided at the groove 411, with one end connected to the end of the groove 411 and the other end extending circumferentially along the drain pipe 400, further defining the bending position of the drain pipe 400.

[0048] More specifically, in this embodiment, the annular groove 412 is closed, and both ends of the annular groove 412 are connected to the ends of the groove 411.

[0049] In other embodiments, the annular groove 412 may be in an open state, with one end of the annular groove 412 connected to the end of the groove 411 and the other end having a gap with the groove 411.

[0050] It is understandable that both of the above-mentioned annular groove 412 configurations can strengthen and limit the bending position of the sewage pipe 400, and the specific structure of the annular groove 412 is processed according to the actual operation requirements.

[0051] More specifically, such as Figures 1 to 4As shown, the ring grooves 412 are provided in plurality, and the plurality of ring grooves 412 are arranged at intervals along the length direction of the blowdown pipe 400. By providing the plurality of ring grooves 412 and arranging the plurality of ring grooves 412 at intervals along the length direction of the blowdown pipe 400, the effect of the ring grooves 412 in limiting the bending position of the blowdown pipe 400 is further enhanced.

[0052] In some embodiments, as shown in Figure 3 and Figure 4 The bracket 300 includes a body, the body includes a connecting portion 310 and a clamping portion 320 connected to each other, the connecting portion 310 is connected to the filter screen 200, and the clamping portion 320 is arranged around the circumference of the connecting portion 310. The clamping portion 320 clamps at the opening of the cavity of the tank 110, and the connecting portion 310 and the filter screen 200 pass through the opening and at least partially extend into the cavity of the tank 110. By arranging the connecting portion 310 connected to the filter screen 200 and the clamping portion 320 around the circumference of the connecting portion 310, when the body of the bracket 300 is connected to the tank 110, the connecting portion 310 and the filter screen 200 extend into the cavity of the tank 110, and the clamping portion 320 clamps at the opening of the cavity of the tank 110, thereby mounting the filter screen 200 on the tank 110.

[0053] Specifically, as shown in Figure 3 and Figure 4 The clamping portion 320 is provided with a foolproof structure 330. By arranging the foolproof structure 330 on the clamping portion 320, the installation error is reduced, the installation time is saved, the product humanization is improved, the consumer satisfaction is improved, and the reliability is improved.

[0054] More specifically, as shown in Figures 1 to 4 The foolproof structure 330 includes a clamping groove, and the tank 110 is provided with a clamping protrusion corresponding to the clamping groove. When the filter screen 200 is placed into the cavity of the tank 110 through the bracket 300, the clamping groove of the clamping portion 320 of the bracket 300 can be clamped to the clamping protrusion of the tank 110, thereby limiting the relative position of the bracket 300 and the tank 110, and limiting the relative position of the filter screen 200 and the tank 110. By arranging the foolproof structure 330, the filter screen 200 and the bracket 300 can only be placed into the sewage tank 100 at the preset installation position. If the placement position deviates from the preset installation position, the filter screen 200 and the bracket 300 cannot be placed into the sewage tank 100.

[0055] Further, as shown in Figures 1 to 4As shown in the drawings, the sewage filtering assembly further comprises a magnet 600 and a Hall sensor, the filter screen 200 is installed on the box body 110 through the bracket 300, the Hall sensor is installed on the cover body 120, the Hall sensor is used for detecting the magnetic field intensity of the magnet 600 and transmitting the detection signal to the controller of the sewage tank 100. By setting the magnet 600 and the Hall sensor, the magnet 600 is installed on the bracket 300, the Hall sensor is installed on the cover body 120, when the box body 110 and the cover body 120 of the sewage tank 100 relatively move, the Hall sensor detects the magnetic field intensity of the magnet 600 and transmits the detection signal to the controller of the sewage tank 100, and the controller judges the relative position between the box body 110 and the cover body 120 of the sewage tank 100 according to the detection signal.

[0056] Specifically, as shown in the drawings, Figure 3 and Figure 4 The bracket 300 comprises a body connected with a supporting lug 340, the body is connected with the filter screen 200, the supporting lug 340 is arranged on the side of the body away from the filter screen 200, and the magnet 600 is arranged on the supporting lug 340. The supporting lug 340 is arranged on the side of the body away from the filter screen 200, and the magnet 600 is arranged on the supporting lug 340.

[0057] Specifically, as shown in the drawings, Figure 3 and Figure 4 The sewage filtering assembly further comprises a waterproof cover 700 and a waterproof pad 710, the waterproof pad 710 is sleeved on the magnet 600, and the waterproof cover 700 is sleeved on the supporting lug 340. By setting the waterproof pad 710 and the waterproof cover 700, the waterproof pad 710 is sleeved on the magnet 600, and the waterproof cover 700 is sleeved on the supporting lug 340, so that water falling on the supporting lug 340 and the magnet 600 is prevented, and the magnetic field of the magnet 600 is not affected.

[0058] More specifically, the waterproof pad 710 abuts against the inner wall of the waterproof cover 700, and the sealing waterproof performance of the magnet 600 is enhanced.

[0059] The application also provides a cleaning robot, comprising a sewage tank 100 and any one of the sewage filtering assemblies, the sewage tank 100 comprises a box body 110 and a cover body 120 connected rotatably, a support 300 is connected to the box body 110, a filter screen 200 is arranged in the box body 110, a second end of a sewage discharge pipe 400 is connected to the box body 110, and a traction rope 500 is connected to the cover body 120. The filter screen 200 is connected to the box body 110 through the support 300, and the filter screen 200 is arranged at least partially in a cavity of the box body 110. The first end of the sewage discharge pipe 400 faces the filter screen 200, and the second end is connected to the box body 110. External sewage can flow into the cavity of the box body 110 through the sewage discharge pipe 400 and the filter screen 200. One end of the traction rope 500 is connected to the cover body 120, and the other end is connected to the first end of the sewage discharge pipe 400. When the cover body 120 is relatively far away from the box body 110, that is, when the cover body 120 of the sewage tank 100 is opened, the traction rope 500 can pull the first end to move away from the filter screen 200. Under the influence of the pulling force of the traction rope 500, the sewage discharge pipe 400 will deform and bend, so that the first end of the sewage discharge pipe 400 deviates from the route for taking out the filter screen 200, thereby facilitating the user to take out the filter screen 200 for cleaning or replacement.

[0060] Specifically, the Hall sensor is mounted on the cover body 120 of the sewage filtering assembly, and is used to detect the magnetic field strength of the magnet 600 and transmit a detection signal to the controller of the sewage tank 100. When the box body 110 and the cover body 120 of the sewage tank 100 move relatively, the Hall sensor detects the magnetic field strength of the magnet 600 and transmits a detection signal to the controller of the sewage tank 100. The controller determines the relative position between the box body 110 and the cover body 120 of the sewage tank 100 according to the detection signal, and further determines whether the cover body 120 is closed on the box body 110.

[0061] Specifically, the Hall sensor cannot detect the magnetic field strength of the magnet 600, at which time the controller determines that the cover body 120 is relatively far away from the box body 110, that is, the sewage tank 100 of the cleaning robot is in a flip cover state. The Hall sensor detects the magnetic field strength of the magnet 600, and the current detected magnetic field strength is within a preset threshold, at which time the controller determines that the sewage tank 100 of the cleaning robot is in a closed state.

[0062] Further, whether the filter screen 200 is placed in the box body 110 can also be determined by the magnet 600 and the Hall sensor. When the sewage tank 100 of the cleaning robot is in the flip cover state, the Hall sensor cannot detect the magnetic field strength of the magnet 600, at this time, it can be judged that the cleaned filter screen 200 or the new filter screen 200 is not placed in the box body 110, and then the cleaning robot can automatically prevent the cleaning task from being performed, so as to avoid that the sewage carrying garbage enters the sewage tank 100, causing the sewage tank 100 to be blocked. When the sewage tank 100 of the cleaning robot is in the closed state, the Hall sensor detects the magnetic field strength of the magnet 600, and the current detected magnetic field strength is in the preset threshold, at this time, it can be judged that the cleaned filter screen 200 or the new filter screen 200 has been placed in the box body 110, and then the cleaning robot can automatically perform the cleaning task.

[0063] In summary, the beneficial effects of the present application are as follows:

[0064] 1. The cover 120 is used to flip to drive the traction rope 500 to drive the drain pipe 400 to fold, so that the first end of the drain pipe 400 is separated from the route for taking out the filter screen 200 and the support 300, facilitating the user to take out the filter screen 200 for cleaning or replacement, and improving the operation experience of the user;

[0065] 2. By arranging the support 300, the filter screen 200 is connected to the box body 110 through the support 300, which can greatly reduce the cost of user replacement and maintenance, and improve the maintainability of the machine;

[0066] 3. The magnet 600 and the Hall sensor can be used to simultaneously realize the in-place detection of the filter screen 200 and the cover closing detection of the machine.

[0067] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0068] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A sewage filtering assembly installed on a sewage tank (100), the sewage tank (100) comprising a body (110) and a cover (120) connected rotatably, characterized in that, The sewage filtering assembly comprises: a filter screen (200) and a bracket (300) connected to each other, the bracket (300) is connected to the box (110), and the filter screen (200) extends into the box (110); a sewage pipe (400) comprising a first end and a second end connected to each other, the first end faces the filter screen (200), and the second end is connected to the box (110) to enable sewage to flow into the box (110) through the sewage pipe (400) and the filter screen (200); a traction rope (500) having one end connected to the first end of the sewage pipe (400) and the other end connected to the cover (120), when the cover (120) is relatively far away from the box (110), the traction rope (500) can pull the first end to move away from the filter screen (200).

2. The sewage filter assembly of claim 1, wherein, An inwardly recessed recessed area (410) is arranged on the outer wall of the sewage pipe (400), and the recessed area (410) is used to bend the sewage pipe (400) at a preset position, wherein the preset position is at least partially located in the recessed area (410).

3. The sewage filter assembly of claim 2, wherein, The recessed area (410) comprises a groove (411) and a ring groove (412), one end of the ring groove (412) is connected to the end of the groove (411), and the other end extends along the circumference of the sewage pipe (400).

4. The sewage filter assembly of claim 3, wherein, A plurality of ring grooves (412) are arranged along the length direction of the sewage pipe (400).

5. The sewage filter assembly of claim 1, wherein, The bracket (300) comprises a body, the body comprises a connecting portion (310) and a lap portion (320) connected to each other, the connecting portion (310) is connected to the filter screen (200), the lap portion (320) is arranged around the circumference of the connecting portion (310), the lap portion (320) is lapped at the opening of the cavity of the box (110), and the connecting portion (310) and the filter screen (200) pass through the opening and at least partially extend into the box (110).

6. The sewage filter assembly of claim 5, wherein, A foolproof structure (330) is arranged on the lap portion (320).

7. The sewage filter assembly of claim 1, wherein, A magnet (600) and a Hall sensor are further included, the magnet (600) is installed on the bracket (300), the Hall sensor is installed on the cover (120), the Hall sensor is used to detect the magnetic field strength of the magnet (600) and transmit a detection signal to the controller of the sewage tank (100).

8. The sewage filter assembly of claim 7, wherein, The bracket (300) comprises a body and a supporting lug (340) connected to each other, the body is connected to the filter screen (200), the supporting lug (340) is arranged on the side of the body away from the filter screen (200), and the magnet (600) is arranged on the supporting lug (340).

9. The sewage filter assembly of claim 8, wherein, A waterproof cover (700) and a waterproof pad (710) are further included, the waterproof pad (710) is sleeved on the magnet (600), and the waterproof cover (700) is sleeved on the supporting lug (340).

10. A cleaning robot, characterized in that, The sewage filtering assembly of any one of claims 1-9, and a sewage tank (100), wherein the sewage tank (100) comprises a tank body (110) and a cover body (120) connected rotatably, the support (300) is connected to the tank body (110), the filter screen (200) is arranged in the tank body (110), a second end of the drain pipe (400) is connected to the tank body (110), and the pulling rope (500) is connected to the cover body (120).

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