Dirt removal mechanism and pool cleaning robot

Abstract

The present invention relates to the technical field of pool cleaning equipment, specifically to a dirt removal mechanism and a pool cleaning robot, which includes a housing. There is a detachable filter box inside the housing. The side wall filter screen divides the filter chamber and the clean water chamber. The bottom water inlet is connected to the filter chamber, and the top water outlet leads to the clean water chamber. The water pumping assembly helps the clean water to be discharged. A walking drive assembly is provided on the outside of the housing to endow it with the ability to move. The cleaning rollers at the front and rear ends are linked with the walking drive assembly. The water inlet is equipped with a check valve to control the sewage to enter the box. A sewage check valve is provided at the sewage outlet at the bottom of the filter box. The detachable collection box in the housing and the sewage outlet form a sewage discharge channel. The sewage pumping and squeezing assembly in the channel is extremely crucial. When the water pumping is reversed, it can backwash the filter box. The sewage pumping and squeezing assembly can also efficiently squeeze out the water of the dirt, make the dirt compact, and then accurately convey it to the collection box to prevent blockage.

Description

Technical Field

[0001] The invention relates to the technical field of swimming pool cleaning equipment, and in particular to a dirt removal mechanism and a swimming pool cleaning robot. Background Art

[0002] As a specific place for swimming, swimming pools will inevitably be mixed with various impurities during daily operation and use, such as garbage debris, floating algae, microbial bacteria and other pollutants. Given that the sanitation of the swimming pool water environment is directly related to the health and experience of users, regular and standardized cleaning of the swimming pool is a key link in the swimming pool operation and maintenance management process.

[0003] Traditional swimming pool cleaning methods rely on manual operations, and workers need to invest a lot of time and physical effort to complete a series of complicated processes such as pool bottom salvage, pool wall wiping, and water vacuuming. With the vigorous development of automation and intelligent technology, swimming pool cleaning robots have emerged, bringing innovative solutions to the field of swimming pool cleaning. The main body of this type of robot is composed of a special shell, in which a water pump and a filter mechanism are precisely assembled. The two work together to form the core power and purification system for swimming pool cleaning. Specifically, when the water pump is started, it uses strong suction to draw the water in the swimming pool containing all kinds of dirt into the shell; then, the filter mechanism uses a fine filter to intercept and capture the sucked dirt, so that it remains in the shell, and the purified water is discharged from the specific drain port of the shell, thereby achieving the basic process of swimming pool cleaning.

[0004] However, a review of the technical architecture of current pool cleaning robots still reveals several defects that need to be overcome. In the actual cleaning process, the dirt left in the shell, along with the accumulation of operation time, can easily cause the filter to become clogged. Once clogged, the suction of the water pump will drop significantly, causing the robot's cleaning efficiency to be greatly reduced, and it will be unable to maintain an efficient and stable cleaning state. What is particularly critical is that most pool cleaning robots on the market currently lack a self-cleaning function module, which means that when the filter is clogged, manual intervention must be used to frequently disassemble the equipment and clean and dredge the filter, which greatly increases the labor cost and the complexity of equipment maintenance, ultimately resulting in a poor user experience and limiting the convenience and practicality of the product.

[0005] Chinese Patent Publication No. CN115807573A discloses a pool cleaning robot with a filter screen anti-clogging function, including a housing. Inside the housing, a filtering mechanism is provided, which divides into a water inlet chamber and a water pump chamber. A sedimentation chamber is also formed inside the housing. The housing is provided with a first opening communicating with the water inlet chamber, a second opening communicating with the water pump chamber, and a third opening communicating with the sedimentation chamber. A garbage filtering and collecting mechanism is provided at the third opening, a first one-way valve that can open towards the inner side of the housing is provided at the first opening, and a second one-way valve that can open towards the outer side of the housing is provided at the third opening.

[0006] By setting the sedimentation chamber, the garbage filtering and collecting mechanism, as well as the first one-way valve and the second one-way valve, the pool cleaning robot forms a reverse water flow when the water pump rotates in the reverse direction, flushes the filtering mechanism, and flushes the dirt to the sedimentation chamber and the garbage filtering and collecting mechanism for temporary storage, avoiding clogging of the filtering mechanism. However, various types of dirt contained in the pool water will inevitably invade and accumulate inside the garbage filtering and collecting mechanism during the cleaning process. With the continuous progress of the cleaning operation, the dirt accumulates continuously, gradually filling some key channels and pores of the filtering and collecting mechanism, and then causing the flow path of the reverse water flow to be severely blocked. Under normal conditions, the reverse water flow undertakes the key function of flushing and dredging the filtering components. Now that its flow is blocked, it greatly weakens the ability of the entire garbage filtering and collecting system to self-adjust and maintain a stable filtering efficiency.

[0007] At the same time, the dirt in the water has complex components and various forms, and many of them have relatively large physical volumes, such as oversized garbage fragments, clumped algae aggregates, etc. Once such large dirt enters the garbage filtering and collecting mechanism, it will quickly occupy a considerable internal space, greatly reducing the effective filtering volume of the filtering and collecting mechanism, not only squeezing the accommodation space for subsequent dirt, but also disturbing the smoothness of the filtering process, and ultimately having a negative impact on the overall cleaning effect of the pool cleaning robot. Summary of the Invention

[0008] Aiming at the problems of the prior art, a decontamination mechanism and a pool cleaning robot are provided. By setting a filter box, a water inlet one-way valve, a sewage one-way valve, and a pump and squeeze component in the machine shell, when the water pumping component guides the water flow in the reverse direction, the filter box is backwashed. The water in the dirt can be efficiently squeezed out by the pump and squeeze, and the volume is greatly reduced, forming a more compact residue form. After being squeezed, the dirt is accurately conveyed to the collection box by the pump and squeeze component, effectively avoiding the problem of the collection box being blocked due to the disorderly accumulation of dirt.

[0009] In order to solve the problems of the prior art, the present invention provides a dirt removal mechanism, including a casing, a filter box which can be detachably connected to the casing is arranged in the casing, a filter screen is arranged on the side wall of the filter box, the inner cavity of the filter box forms a filter cavity, a clean water cavity is formed between the outer wall of the filter box and the inner wall of the casing, a water inlet extending along the width direction of the casing and connected to the filter cavity is also arranged at the bottom of the casing, a water outlet connected to the clean water cavity is also arranged at the top of the casing, a water pump assembly for guiding the liquid in the clean water cavity to pass through the water outlet is arranged in the casing; a walking wheel for driving the casing to move in water is also arranged on the outside of the casing driving assembly; cleaning rollers which are transmission-connected to the travel driving assembly are arranged at the front and rear ends of the casing; a water inlet check valve is also arranged at the water inlet, and sewage can pass through the water inlet check valve and enter the filter box; a sewage outlet is also arranged at the bottom of the filter box, and a sewage outlet check valve is arranged at the sewage outlet, and dirt in the filter box can pass through the sewage outlet through the sewage outlet check valve; a collecting box which can be detachably connected to it is also arranged in the casing, and a sewage outlet channel is formed between the collecting box and the sewage outlet, and a sewage pump squeezing assembly for squeezing dirt at the sewage outlet and introducing the dirt into the collecting box is arranged in the sewage outlet channel.

[0010] Preferably, a connecting ear is provided at the top of the water inlet, and a longitudinally extending sliding groove is provided on the connecting ear. The water inlet one-way valve includes a cover plate longitudinally slidably arranged on the top of the water inlet, and the edge of the cover plate abuts against the top edge of the water inlet. A sliding block longitudinally extending is provided on the side of the cover plate, and the sliding block passes through the sliding groove and slides with it.

[0011] Preferably, a collecting bin is provided at the bottom end of the inner cavity of the filter box, the top of the collecting bin is opened to form a collecting port, the side of the collecting bin is opened to form the sewage outlet, the sewage outlet one-way valve includes a flip plate and an elastic reset element, one side of the flip plate is rotatably arranged in the collecting bin, the top of the sewage outlet is provided with a stepped groove, and the other end of the flip plate abuts against the stepped groove; the elastic reset element is arranged between the bottom end of the flip plate and the bottom end of the collecting bin.

[0012] Preferably, the pump and sewage pressing assembly includes a pump and sewage box, a pump and sewage shaft, and a one-way synchronous transmission mechanism; the pump and sewage box is fixedly arranged at the bottom of the inner cavity of the housing, a sewage inlet capable of being docked with the sewage discharge port is arranged on one side of the pump and sewage box, a circular long groove connected to the sewage inlet is arranged in the pump and sewage box, a connecting pipe connected to the end of the circular long groove is arranged at one end of the pump and sewage box, the connecting pipe is communicated with the collection box, and filtering holes communicated with the outside of the housing are arranged at the bottom of the circular long groove; the pump and sewage shaft is coaxially rotatably arranged in the circular long groove, a perforated spiral blade coaxial with it is arranged on the circumferential surface of the pump and sewage shaft, and one end of the pump and sewage shaft penetrates through the pump and sewage box and is rotatably connected with it; the one-way synchronous transmission mechanism synchronously drives and connects the pump and sewage shaft and the walking drive assembly, and when the walking drive assembly retreats, torque is transmitted to the pump and sewage shaft through the one-way synchronous transmission mechanism; a tapered head elastically abutted against it is arranged at the outer end of the connecting pipe, the tip of the tapered head faces the pump and sewage shaft, and an extrusion port can be formed between the tapered surface of the tapered head and the edge of the connecting pipe.

[0013] Preferably, the pump and sewage shaft is hollow and a connecting shaft coaxially and slidably matched with it is arranged therein. One end of the connecting shaft is coaxially connected with the tapered head, a positioning ring located at the outer end of the pump and sewage shaft is arranged at the other end of the connecting shaft, a limiting ring is arranged at one end of the pump and sewage shaft facing the positioning ring, and an elastic abutting element is sleeved on the connecting shaft and is located between the positioning ring and the limiting ring.

[0014] Preferably, the positioning ring and the connecting shaft are threadedly connected.

[0015] Preferably, a sealing box is also arranged in the housing. The walking drive assembly includes a driving wheel, a driven wheel, a driving track and a forward motor; there are two driving wheels which are respectively rotatably arranged on both sides of the housing; there are four driven wheels and two of them are located on both sides of the driving wheel respectively, and a cleaning roller is coaxially arranged between two coaxially arranged driven wheels; the driving track is sleeved on the driving wheel and the driven wheel; the forward motor is arranged in the sealing box, and the output shaft of the forward motor penetrates through the sealing box and is drivingly connected with the driving wheel; the one-way synchronous transmission mechanism drives and connects the output shaft of the forward motor and the pump and sewage shaft.

[0016] Preferably, the one-way synchronous transmission mechanism includes a driving disc, a driven disc, a driving sprocket, a driven sprocket and a synchronous chain; the driving disc is synchronously drivingly connected with the output shaft of the forward motor, a fixing ring is arranged at one end of the driving disc, and ratchet grooves distributed along its circumferential direction are arranged on the inner circumference of the fixing ring; the driven disc is coaxially rotatably arranged in the fixing ring, ratchet teeth distributed along its circumferential direction and a spring for abutting the ratchet teeth against the ratchet grooves are arranged on the driven disc; the driving sprocket is coaxially fixedly connected with the driving disc; the driven sprocket is coaxially fixedly connected with the pump and sewage shaft; the synchronous chain is sleeved on the driving sprocket and the driven sprocket.

[0017] Preferably, a drainage tube extending downward and abutting against the sealing box is provided at the bottom end of the water outlet. A drainage groove communicating with the clean water chamber is provided on the drainage tube. The water pumping assembly includes a water pumping motor and an impeller. The water pumping motor is arranged in the sealing box, and the output shaft of the water pumping motor penetrates through the sealing box and extends into the drainage tube. The impeller is coaxially arranged on the output shaft of the water pumping motor and is higher than the drainage groove.

[0018] A pool cleaning robot, including a dirt removal mechanism.

[0019] The beneficial effects of this application compared with the prior art are:

[0020] In this application, a filter box, an inlet check valve, a sewage check valve, and a sewage pumping and pressing assembly are integrated in the housing. Among them, the inlet check valve can ensure that water flows into the filter box stably and orderly, and at the same time prevent dirt from flowing back through the water inlet to pollute the pool during backwashing. The sewage check valve is responsible for defining the reverse flow path of the fluid, laying a solid foundation for the stable development of the subsequent backwashing process.

[0021] When the water pumping assembly performs the reverse water flow guiding operation, the kinetic energy of the water flow is utilized to drive the backwashing process to act precisely on the filter box. During this process, the impact force carried by the water flow flushes all filter material layers of the filter box from all directions at a specific angle, stripping various dirt attached to the gaps and surfaces of the filter materials. At the same time, the sewage pumping and pressing assembly operates in coordination to carry out deep pressing treatment on the stripped dirt. The water in the dirt is efficiently squeezed out, causing a significant reduction in the volume of the dirt, and then transformed into a residue with a more compact texture and denser structure.

[0022] After being precisely pressed by the sewage pumping and pressing assembly, the dirt will be driven by the internal mechanical transmission structure of the assembly, following the preset conveying trajectory and speed, and conveyed into a specially set collection box. This avoids the potential hidden danger of the internal flow channel of the collection box being blocked due to the random scattering and irregular accumulation of dirt, effectively ensuring the high efficiency and stability of the entire equipment sewage discharge link, and maintaining the long-term stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a perspective view of the pool cleaning robot of the present invention.

[0024] Figure 2 is a cross-sectional view of the pool cleaning robot of the present invention.

[0025] Figure 3 is a schematic diagram of the internal structure of the pool cleaning robot of the present invention.

[0026] Figure 4 is a perspective view of the one-way synchronous transmission mechanism in the pool cleaning robot of the present invention.

[0027] Figure 5 This is a perspective view of the filter box and the pump sewage pressing component in the pool cleaning robot of the present invention.

[0028] Figure 6 This is an exploded perspective view of the filter box and the pump sewage pressing component in the pool cleaning robot of the present invention.

[0029] Figure 7 This is a side view of the filter box and the pump sewage pressing component in the pool cleaning robot of the present invention.

[0030] Figure 8 It is Figure 7 a cross-sectional view taken along the A-A direction of

[0031] Figure 9 This is an exploded perspective view of the pump sewage pressing component in the pool cleaning robot of the present invention.

[0032] Figure 10 It is Figure 9 a partial enlarged view at position B of

[0033] The reference numerals in the figure are: 1, housing; 11, water inlet; 111, water inlet check valve; 1111, cover plate; 112, connecting ear; 12, water outlet; 121, drainage cylinder; 1211, drainage groove; 2, filter box; 21, sewage discharge port; 211, sewage discharge check valve; 2111, turning plate; 2112, elastic reset element; 22, collection bin; 31, pump water motor; 32, impeller; 4, walking drive assembly; 41, driving wheel; 42, driven wheel; 43, driving track; 44, forward motor; 5, cleaning roller; 6, collection box; 7, pump sewage pressing component; 71, pump sewage box; 711, sewage inlet; 712, filter hole; 713, connecting pipe; 72, pump sewage shaft; 721, perforated spiral blade; 722, limiting ring; 73, conical head; 74, one-way synchronous transmission mechanism; 741, driving disc; 7411, fixing ring; 7412, ratchet groove; 742, driven disc; 7421, ratchet tooth; 7422, spring; 743, driving sprocket; 744, driven sprocket; 745, synchronous chain; 75, connecting shaft; 76, positioning ring; 77, elastic abutting element. Detailed Embodiment

[0034] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be described in further detail below in conjunction with the drawings and specific embodiments.

[0035] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the present application provides a dirt removal mechanism, including a casing 1, a filter box 2 which can be detachably connected to the casing 1 is arranged inside the casing 1, a filter screen is arranged on the side wall of the filter box 2, the inner cavity of the filter box 2 forms a filter cavity, a clean water cavity is formed between the outer wall of the filter box 2 and the inner wall of the casing 1, a water inlet 11 extending along the width direction and connected to the filter cavity is also arranged at the bottom of the casing 1, a water outlet 12 connected to the clean water cavity is also arranged at the top of the casing 1, a water pump assembly for guiding the liquid in the clean water cavity to pass through the water outlet 12 is arranged inside the casing 1; a walking drive assembly 4 for driving the casing 1 to move in the water is also arranged on the outside of the casing 1; the front end and A cleaning roller 5 which is transmission-connected to the travel drive assembly 4 is provided at the rear end; a water inlet check valve 111 is also provided at the water inlet 11, and sewage can pass through the water inlet check valve 111 and enter the filter box 2; a sewage outlet 21 is also provided at the bottom of the filter box 2, and a sewage discharge check valve 211 is provided at the sewage discharge outlet 21, and the sewage in the filter box 2 can pass through the sewage discharge check valve 211 and pass through the sewage discharge outlet 21; a collecting box 6 which can be detachably connected thereto is also provided in the casing 1, and a sewage discharge channel is formed between the collecting box 6 and the sewage discharge outlet 21, and a sewage pumping component 7 for squeezing the sewage at the sewage discharge outlet 21 and introducing the sewage into the collecting box 6 is provided in the sewage discharge channel.

[0036] The main body of the decontamination mechanism is composed of a housing 1, and a filter box 2 is arranged inside the housing 1. The two are connected in a detachable manner. This design facilitates subsequent maintenance and replacement operations and ensures long-term stable operation of the equipment. A filter net is embedded in the side wall of the filter box 2. Different functional areas are divided by the fine screening characteristics of the filter net: its inner cavity is constructed as a filter cavity, which is mainly responsible for filtering sewage; and the outer wall of the filter box 2 and the inner wall of the housing 1 are surrounded to form a clean water cavity, where the clean water after filtration is gathered.

[0037] At the bottom of the housing 1, a water inlet 11 is arranged along its width. This water inlet 11 is connected to the filter chamber and is the entrance for sewage to enter the filter box 2. A water inlet check valve 111 is installed at the water inlet 11. With the one-way conduction characteristics of the check valve, sewage can pass through in an orderly manner and be accurately injected into the filter box 2 to avoid backflow interference with the filtration process and to avoid dirt overflowing through the water inlet 11 during backwashing. At the top of the housing 1, a water outlet 12 connected to the clean water chamber is provided. A matching pump assembly is placed in the housing 1 to provide a directional driving force for the liquid in the clean water chamber, so that the purified clean water can stably pass through the water outlet 12 and be discharged.

[0038] The outer side of the housing 1 is also equipped with a travel drive assembly 4, which can give the housing 1 a precise displacement driving force, so that it can move smoothly along a preset trajectory in the water environment, and expand the operating coverage of the equipment. A cleaning roller 5 is placed at the front and rear ends of the housing 1. The cleaning roller 5 is connected to the travel drive assembly 4 by transmission. As the equipment moves forward, the cleaning roller 5 rotates synchronously under the power drive. Through the special cleaning structures such as bristles and scrapers on its surface, the attached dirt is physically peeled off and preliminarily cleaned wherever it passes, which helps to improve the overall decontamination efficiency.

[0039] A sewage outlet 21 is provided at the bottom of the filter box 2, and a sewage one-way valve 211 is installed at the sewage outlet 21. A detachably connected collection box 6 is also placed in the housing 1, and a sewage channel is constructed between it and the sewage outlet 21. A sewage pump squeezing component 7 is integrated inside the sewage channel. This component uses the principle of mechanical squeezing. When the sewage flows through here, it applies a precisely controllable squeezing force to efficiently squeeze out the excess water in the sewage, reduce its volume, and then smoothly introduce the compacted sewage after squeezing into the collection box 6, which greatly reduces the risk of clogging the sewage channel or the collection box 6 due to loose accumulation of sewage, and ensures the smoothness and stability of the sewage discharge process of the equipment.

[0040] like Figure 2 As shown, a connecting ear 112 is provided at the top of the water inlet 11, and a longitudinally extending sliding groove is opened on the connecting ear 112. The water inlet one-way valve 111 includes a cover plate 1111 longitudinally slidably arranged on the top of the water inlet 11, and the edge of the cover plate 1111 abuts against the top edge of the water inlet 11. A sliding block extending longitudinally is provided on the side of the cover plate 1111, and the sliding block passes through the sliding groove and slides with it.

[0041] A sliding groove extending along the longitudinal dimension is designed on the structure of the connecting ear 112, and the cover plate 1111 is precisely placed on the top area of ​​the water inlet 11 in a sliding manner along the longitudinal direction. From the perspective of assembly relationship, the edge of the cover plate 1111 fits tightly with the edge of the top of the water inlet 11 to form a stable plane contact. This fitting state ensures good sealing while providing physical support for the subsequent realization of the one-way valve function.

[0042] A sliding block extending in the longitudinal direction is constructed on the side of the cover plate 1111. The sliding block passes straight through the sliding groove from one end, and a smooth and highly accurate sliding fit relationship is established between the two. Relying on this precise fit, the cover plate 1111 can slide stably in the longitudinal direction on the top of the water inlet 11, accurately responding to the water flow control requirements under different working conditions in the system, thereby achieving a stable and efficient opening and closing action of the one-way valve, and maintaining the unidirectionality and controllability of the fluid delivery process.

[0043] like Figure 8 and Figure 9As shown in the figure, a collection bin 22 is provided at the bottom end of the inner cavity of the filter box 2. The top of the collection bin 22 is open to form a collection port, and the side of the collection bin 22 is open to form the sewage discharge port 21. The sewage check valve 211 includes a flip plate 2111 and an elastic reset element 2112. One side of the flip plate 2111 is rotatably arranged in the collection bin 22. A stepped groove is provided at the top end of the sewage discharge port 21, and the other end of the flip plate 2111 abuts against the stepped groove; the elastic reset element 2112 is arranged between the bottom end of the flip plate 2111 and the bottom end of the collection bin 22.

[0044] At the bottom end part of the inner cavity of the filter box 2, a collection bin 22 is installed. The collection bin 22 is in an open state, thereby constructing a collection port, which undertakes the important function of converging and storing the dirt intercepted by the preliminary filtration process. An opening is also provided on the side of the collection bin 22, and this opening is the sewage discharge port 21, which is the passage for the subsequent dirt discharge process.

[0045] The sewage check valve 211 is mainly composed of two key elements, namely a flip plate 2111 and an elastic reset element 2112. One side of the flip plate 2111 is rotatably assembled inside the collection bin 22 by means of a pin connection, so as to realize the function of flexibly rotating around the pin. Corresponding to the top position of the sewage discharge port 21, a stepped groove is specially made, and the other end of the flip plate 2111 precisely abuts against this stepped groove, achieving a tight fit between the two, forming an initial sealing state, and restricting the intrusion of reverse fluid from the physical structure level.

[0046] The elastic reset element 2112 is arranged between the bottom end of the flip plate 2111 and the bottom end of the collection bin 22. When the forward pressure causes the flip plate 2111 to rotate around the axis against the elastic force of the elastic reset element 2112, that is, when the water flow reverses, the sewage discharge port 21 opens and the dirt can be discharged; once the forward pressure disappears, the elastic reset element 2112 quickly pushes the flip plate 2111 to reset by its own elastic force, making it abut against the stepped groove again, quickly restoring the sealed state, eliminating the possibility of reverse fluid flowing into the collection bin 22, and effectively ensuring the accurate realization of the check valve function and the stable operation of the entire filtration system.

[0047] As Figure 5 、 Figure 6 、 Figure 7 and Figure 9 shown, the sewage pumping and squeezing assembly 7 includes a sewage pumping box 71, a sewage pumping shaft 72 and a one-way synchronous transmission mechanism 74;

[0048] The pump dirt box 71 is fixedly arranged at the bottom of the inner cavity of the housing 1. A dirt inlet 711 capable of docking with the sewage outlet 21 is arranged on one side of the pump dirt box 71. A circular long groove connected to the dirt inlet 711 is arranged in the pump dirt box 71. One end of the pump dirt box 71 is provided with a connecting pipe 713 connected to the end of the circular long groove. The connecting pipe 713 is communicated with the collection box 6. Filter holes 712 communicated with the outside of the housing 1 are arranged at the bottom of the circular long groove; the pump dirt shaft 72 is coaxially rotatably arranged in the circular long groove. A perforated spiral blade 721 coaxial with it is arranged on the circumferential surface of the pump dirt shaft 72. One end of the pump dirt shaft 72 penetrates through the pump dirt box 71 and is rotatably connected with it; the one-way synchronous transmission mechanism 74 synchronously drives and connects the pump dirt shaft 72 and the traveling drive assembly 4. When the traveling drive assembly 4 retreats, torque is transmitted to the pump dirt shaft 72 through the one-way synchronous transmission mechanism 74; a tapered head 73 elastically abutted against it is arranged at the outer end of the connecting pipe 713. The tip of the tapered head 73 faces the pump dirt shaft 72. An extrusion port can be formed between the tapered surface of the tapered head 73 and the edge of the connecting pipe 713.

[0049] The pump dirt box 71 is firmly and precisely positioned at the bottom of the inner cavity of the housing 1. On one side of the pump dirt box 71, a dirt inlet 711 is arranged. The dirt inlet 711 can be seamlessly docked with the sewage outlet 21, thereby building a dedicated channel for dirt to enter the pump dirt box 71. A circular long groove is constructed inside the pump dirt box 71. The circular long groove is smoothly connected to the dirt inlet 711. Under the guidance of the hydrodynamic principle, it is ensured that the entering dirt can flow into the groove smoothly. At one end of the pump dirt box 71, a connecting pipe 713 is also extended. The connecting pipe 713 accurately communicates the end of the circular long groove with the collection box 6, constituting a key link for transporting dirt to the collection box 6. In addition, to meet specific filtering requirements, filter holes 712 communicated with the outside of the housing 1 are arranged at the bottom of the circular long groove.

[0050] The pump dirt shaft 72 is exquisitely arranged in the circular long groove in a coaxially rotating manner. A perforated spiral blade 721 is assembled on its circumferential surface. The blade is coaxially arranged with the pump dirt shaft 72, ensuring that during its rotation, the dirt in the circular long groove can be efficiently squeezed and pushed. One end of the pump dirt shaft 72 extends through the pump dirt box 71.

[0051] When the traveling drive assembly 4 performs a retreating action, the torque generated by the traveling drive assembly 4 is accurately transmitted to the pump dirt shaft 72, enabling the pump dirt shaft 72 to drive the spiral blade to rotate in the circular long groove and continuously push the dirt towards the tapered head 73. At the tapered surface of the tapered head 73, the dirt is continuously squeezed until the squeezing force is greater than the abutting force of the tapered head 73 on the connecting head. An extrusion port can be formed between the tapered surface of the tapered head 73 and the edge of the connecting pipe 713. The squeezed dirt can enter the collection box 6 through the extrusion port, thereby ensuring that the dirt can be stored in the form of residues.

[0052] As Figure 9As shown, the pump sewage shaft 72 is hollow and a connecting shaft 75 that is coaxially and slidably engaged with it is provided therein. One end of the connecting shaft 75 is coaxially connected to the conical head 73. A positioning ring 76 located at the outer end of the pump sewage shaft 72 is provided at the other end of the connecting shaft 75. A limiting ring 722 is provided at one end of the pump sewage shaft 72 facing the positioning ring 76. An elastic abutting element 77 is sleeved on the connecting shaft 75, and the elastic abutting element 77 is located between the positioning ring 76 and the limiting ring 722.

[0053] In the hollow inner cavity of the pump sewage shaft 72, a connecting shaft 75 is arranged. The connecting shaft 75 and the pump sewage shaft 72 are coaxially arranged, and the two establish a coaxially sliding fit relationship.

[0054] One end of the connecting shaft 75 is coaxially connected to the conical head 73, so that the two can cooperate with each other during subsequent operation and efficiently conduct the external acting force to the conical head 73. At the other end of the connecting shaft 75, a positioning ring 76 is provided. The positioning ring 76 is firmly arranged in the outer end area of the pump sewage shaft 72. Its function is to provide a precise positioning reference for the axial displacement of the connecting shaft 75. The positioning ring 76 is closely attached to the connecting shaft 75 to ensure the position accuracy of the connecting shaft 75 in the axial direction.

[0055] A limiting ring 722 is provided at one end of the pump sewage shaft 72 facing the positioning ring 76.

[0056] An elastic abutting element 77 is sleeved on the connecting shaft 75. So that the conical surface of the conical head 73 can elastically abut against the port of the connecting pipe 713. Until the pressure on its conical surface is greater than the elastic force of the elastic abutting element 77, an extrusion port can be formed between the conical surface of the conical head 73 and the edge of the connecting pipe 713.

[0057] As Figure 9 and Figure 10 shown, the positioning ring 76 and the connecting shaft 75 are threadedly connected.

[0058] By rotating the positioning ring 76 relative to the connecting shaft 75, the abutting force of the conical head 73 against the connecting pipe 713 can be adjusted. When the positioning ring 76 rotates towards the direction close to the conical head 73, the length of the elastic abutting element 77 decreases, and thus the abutting force of the conical head 73 against the connecting pipe 713 increases; on the contrary, if the positioning ring 76 rotates and retreats in the direction away from the conical head 73, the length of the elastic abutting element 77 increases, and the abutting force decreases accordingly. In this way, the abutting force of the conical head 73 against the connecting pipe 713 can be precisely and flexibly adjusted according to the actual working conditions requirements, and the overall operating efficiency of the pump sewage pressing assembly 7 can be optimized.

[0059] As Figure 8 and Figure 10As shown, a sealed box is also provided in the casing 1. The traveling drive assembly 4 includes a driving wheel 41, a driven wheel 42, a driving track 43, and a forward motor 44. There are two driving wheels 41, which are respectively rotatably arranged on both sides of the casing 1. There are four driven wheels 42, and two of them are located on both sides of each driving wheel 41. The cleaning roller 5 is coaxially arranged between two coaxially arranged driven wheels 42. The driving track 43 is sleeved on the driving wheel 41 and the driven wheel 42. The forward motor 44 is arranged in the sealed box. The output shaft of the forward motor 44 penetrates through the sealed box and is in transmission connection with the driving wheel 41. The one-way synchronous transmission mechanism 74 is in transmission connection with the output shaft of the forward motor 44 and the pump dirt shaft 72.

[0060] The driving track 43 is sleeved on the driving wheel 41 and the driven wheel 42. During the assembly process, the tension of the track is strictly controlled, and a tension adjusting device is used to maintain it in a suitable range, which not only avoids the slipping phenomenon caused by being too loose but also prevents the additional frictional loss and component stress concentration caused by being too tight.

[0061] The forward motor 44, as the power source of the traveling drive assembly 4, is properly arranged in the sealed box. The sealed box provides a stable and reliable operating space for the forward motor 44. The output shaft of the forward motor 44 passes through the sealed box. This penetration process uses a high-precision shaft seal device to ensure that the sealing performance of the sealed box is not damaged. After passing through, the output shaft establishes a stable transmission connection with the driving wheel 41 according to the mechanical transmission principle.

[0062] When the output shaft of the forward motor 44 rotates under specific working conditions, the one-way synchronous transmission mechanism 74 can orderly and unidirectionally transmit the torque to the pump dirt shaft 72, achieving synchronous actions between the two, so that the two key functions of traveling drive and pump dirt squeezing can operate in coordination, improving the overall operating efficiency of the equipment.

[0063] As Figure 8 and Figure 10 shown, the one-way synchronous transmission mechanism 74 includes a driving disk 741, a driven disk 742, a driving sprocket 743, a driven sprocket 744, and a synchronous chain 745. The driving disk 741 is in synchronous transmission connection with the output shaft of the forward motor 44. One end of the driving disk 741 is provided with a fixing ring 7411, and the inner circumference of the fixing ring 7411 is provided with ratchet grooves 7412 distributed along its circumferential direction. The driven disk 742 is coaxially rotatably arranged in the fixing ring 7411. The driven disk 742 is provided with ratchet teeth 7421 distributed along its circumferential direction and a spring 7422 for abutting the ratchet teeth 7421 against the ratchet grooves 7412. The driving sprocket 743 is coaxially fixedly connected to the driving disk 741. The driven sprocket 744 is coaxially fixedly connected to the pump dirt shaft 72. The synchronous chain 745 is sleeved on the driving sprocket 743 and the driven sprocket 744.

[0064] The active disk 741 and the output shaft of the forward motor 44 establish a synchronous transmission connection relationship, ensuring that the active disk 741 can accurately follow the rotation of the output shaft of the forward motor 44 and stably and losslessly receive the torque output by the motor. At one end of the active disk 741, a fixed ring 7411 is integrally formed, and the inner circumference of the fixed ring 7411 is carefully processed with ratchet grooves 7412 evenly distributed along its circumference, in order to achieve a precise fit with the corresponding parts on the driven disk 742, thereby realizing a one-way transmission function.

[0065] The driven disk 742 is arranged in the fixed ring 7411 in a coaxial rotation manner. The driven disk 742 is provided with ratchet teeth 7421 distributed along its circumference. The ratchet teeth 7421 are precisely matched with the ratchet grooves 7412 with the same spacing as the inner circumference of the fixed ring 7411. The two cooperate with each other to form the core structure of the one-way transmission. In addition, a spring 7422 is provided for abutting the ratchet teeth 7421 in the ratchet grooves 7412. The spring 7422 continuously applies a stable elastic force to drive the ratchet teeth 7421 to abut tightly against the ratchet grooves 7412, ensuring stable power transmission during forward transmission; when a reverse driving torque occurs, the ratchet teeth 7421 are blocked by the ratchet grooves 7412, and the driven disk 742 is kept stationary with the help of the buffering of the spring 7422, thereby achieving a one-way transmission effect.

[0066] The driving sprocket 743 and the driving disk 741 are connected in a coaxial fixed manner to ensure that the two always maintain coaxial synchronization during high-speed rotation, thereby avoiding transmission errors and component wear caused by eccentricity and looseness.

[0067] The driven sprocket 744 is precisely positioned and installed on the sewage pump shaft 72 to ensure the coaxial consistency of the two during rotation.

[0068] The synchronous chain 745 is mounted on the driving sprocket 743 and the driven sprocket 744. During assembly, the tension of the chain is finely adjusted with the help of a tensioning device to maintain the chain in an optimal working state, thereby avoiding problems such as tooth skipping and increased wear caused by loose or overtightened chains, thereby ensuring stable and efficient transmission of power between the driving sprocket 743 and the driven sprocket 744.

[0069] When the output shaft of the forward motor 44 rotates forward, the forward motor 44 cannot input torque to the sewage pump shaft 72. When the output shaft of the forward motor 44 rotates reversely, the forward motor 44 can input torque to the sewage pump shaft 72, so that the sewage pump shaft 72 rotates to squeeze the sewage.

[0070] like Figure 2As shown in the figure, at the bottom end of the water outlet 12, there is a drainage tube 121 that extends downward and abuts against the sealing box. A drainage groove 1211 communicating with the clean water chamber is provided on the drainage tube 121. The water pumping assembly includes a water pumping motor 31 and an impeller 32. The water pumping motor 31 is arranged in the sealing box, and the output shaft of the water pumping motor 31 penetrates through the sealing box and extends into the drainage tube 121. The impeller 32 is coaxially arranged on the output shaft of the water pumping motor 31 and is higher than the drainage groove 1211.

[0071] At the bottom part of the water outlet 12, there is a drainage tube 121 which extends vertically downward and its end abuts against the corresponding position of the sealing box. On the wall of the drainage tube 121, a drainage groove 1211 is accurately opened. This drainage groove 1211 communicates with the clean water chamber, aiming to achieve the most efficient and smooth drainage and transportation of the purified water in the clean water chamber.

[0072] The water pumping motor 31 is properly arranged inside the sealing box. The output shaft of the water pumping motor 31 passes through the sealing box, ensuring that the sealing performance of the sealing box is not damaged at all, and the output shaft smoothly extends into the drainage tube 121.

[0073] The impeller 32 is accurately assembled coaxially on the output shaft of the water pumping motor 31. Its position is higher than the drainage groove 1211. Such a layout enables the impeller 32 to accurately capture the water in the drainage tube 121 when the water pumping motor 31 drives the impeller 32 to rotate at a high speed. By means of the centrifugal force principle, the water is promoted to flow stably through the drainage groove 1211 to the water outlet 12 at an appropriate flow rate and flow volume, thereby realizing the efficient discharge of the purified water in the clean water chamber to the external environment.

[0074] As Figure 1 shown, the pool cleaning robot includes a dirt removal mechanism.

[0075] The above embodiments only represent one or several implementation manners of the present invention. The description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A decontamination mechanism, characterized in that: The invention comprises a casing (1), wherein a filter box (2) which can be detachably connected to the casing (1) is arranged inside the casing (1), a filter screen is arranged on the side wall of the filter box (2), an inner cavity of the filter box (2) forms a filter cavity, a clean water cavity is formed between the outer wall of the filter box (2) and the inner wall of the casing (1), a water inlet (11) extending along the width direction thereof and communicating with the filter cavity is arranged at the bottom of the casing (1), a water outlet (12) communicating with the clean water cavity is arranged at the top of the casing (1), and a water pump assembly for guiding liquid in the clean water cavity to pass through the water outlet (12) is arranged inside the casing (1); A travel drive assembly (4) for driving the housing (1) to move in water is also provided on the outer side of the housing (1); Cleaning rollers (5) are provided at the front and rear ends of the housing (1) and are transmission-connected to the travel drive assembly (4); The water inlet (11) is also provided with a water inlet check valve (111), and sewage can pass through the water inlet check valve (111) and enter the filter box (2); A sewage outlet (21) is also provided at the bottom of the filter box (2), and a sewage outlet one-way valve (211) is provided at the sewage outlet (21), so that the sewage in the filter box (2) can pass through the sewage outlet (21) through the sewage outlet one-way valve (211); The housing (1) is also provided with a collecting box (6) that can be detachably connected thereto, a sewage discharge passage is formed between the collecting box (6) and the sewage discharge port (21), and a sewage pumping and squeezing assembly (7) for squeezing sewage at the sewage discharge port (21) and introducing the sewage into the collecting box (6) is provided in the sewage discharge channel; The sewage pumping assembly (7) comprises a sewage pumping box (71), a sewage pumping shaft (72) and a one-way synchronous transmission mechanism (74); The sewage pump box (71) is fixedly arranged at the bottom of the inner cavity of the casing (1); a sewage inlet (711) capable of docking with the sewage outlet (21) is provided on one side of the sewage pump box (71); a circular long groove connected to the sewage inlet (711) is provided in the sewage pump box (71); a connecting pipe (713) connected to the end of the circular long groove is provided at one end of the sewage pump box (71); the connecting pipe (713) is connected to the collection box (6); and a filtering hole (712) connected to the outside of the casing (1) is provided at the bottom of the circular long groove; The sewage pump shaft (72) is coaxially rotatably arranged in the circular long groove, and a spiral blade (721) with a hole coaxially therewith is arranged on the circumferential surface of the sewage pump shaft (72). One end of the sewage pump shaft (72) penetrates the sewage pump box (71) and is rotatably connected thereto. The one-way synchronous transmission mechanism (74) synchronously transmits the sewage pump shaft (72) and the travel drive assembly (4), and when the travel drive assembly (4) moves backward, the one-way synchronous transmission mechanism (74) transmits torque to the sewage pump shaft (72); The outer end of the connecting pipe (713) is provided with a conical head (73) elastically abutting against the connecting pipe, the tip of the conical head (73) faces the sewage pump shaft (72), and an extrusion opening can be formed between the conical surface of the conical head (73) and the edge of the connecting pipe (713).

2. The dirt removal mechanism according to claim 1, characterized in that: The top of the water inlet (11) is provided with a connecting ear (112), and a longitudinally extending sliding groove is provided on the connecting ear (112). The water inlet one-way valve (111) comprises a cover plate (1111) longitudinally slidably arranged at the top of the water inlet (11), the edge of the cover plate (1111) abuts against the top edge of the water inlet (11), and a longitudinally extending sliding block is provided on the side of the cover plate (1111), and the sliding block passes through the sliding groove and slides with it.

3. The dirt removal mechanism according to claim 1, characterized in that: A collecting bin (22) is provided at the bottom end of the inner cavity of the filter box (2); the top of the collecting bin (22) is open to form a collecting port; the side of the collecting bin (22) is open to form the sewage outlet (21); the sewage outlet one-way valve (211) comprises a flip plate (2111) and an elastic reset element (2112); one side of the flip plate (2111) is rotatably arranged in the collecting bin (22); a stepped groove is provided at the top end of the sewage outlet (21); and the other end of the flip plate (2111) abuts against the stepped groove; the elastic reset element (2112) is arranged between the bottom end of the flip plate (2111) and the bottom end of the collecting bin (22).

4. The dirt removal mechanism according to claim 1, characterized in that: The sewage pump shaft (72) is hollow and has a connecting shaft (75) coaxially slidably engaged therewith. One end of the connecting shaft (75) is coaxially connected to the conical head (73). The other end of the connecting shaft (75) is provided with a positioning ring (76) located at the outer end of the sewage pump shaft (72). A limiting ring (722) is provided at one end of the sewage pump shaft (72) facing the positioning ring (76). An elastic abutting element (77) is sleeved on the connecting shaft (75). The elastic abutting element (77) is located between the positioning ring (76) and the limiting ring (722).

5. The dirt removal mechanism according to claim 4, characterized in that: The positioning ring (76) is threadedly connected to the connecting shaft (75).

6. The dirt removal mechanism according to claim 1, characterized in that: A sealing box is also provided in the housing (1), and the travel drive assembly (4) comprises a driving wheel (41), a driven wheel (42), a transmission crawler belt (43) and a forward motor (44); There are two driving wheels (41) which are rotatably arranged on both sides of the casing (1); There are four driven wheels (42) and two of them are located on both sides of the driving wheel (41), and the cleaning roller (5) is coaxially arranged between the two coaxial driven wheels (42); The transmission crawler belt (43) is sleeved on the driving wheel (41) and the driven wheel (42); The forward motor (44) is arranged in the sealing box, and the output shaft of the forward motor (44) passes through the sealing box and is drivingly connected to the driving wheel (41); The one-way synchronous transmission mechanism (74) is transmission-connected to the output shaft of the forward motor (44) and the sewage pump shaft (72).

7. The dirt removal mechanism according to claim 6, characterized in that: The one-way synchronous transmission mechanism (74) comprises a driving disc (741), a driven disc (742), a driving sprocket (743), a driven sprocket (744) and a synchronous chain (745); The driving disk (741) is synchronously connected to the output shaft of the forward motor (44); a fixing ring (7411) is provided at one end of the driving disk (741); and ratchet grooves (7412) distributed along the circumference of the fixing ring (7411); The driven disk (742) is coaxially rotatably disposed in the fixed ring (7411), and the driven disk (742) is provided with ratchet teeth (7421) distributed along its circumference and a spring (7422) for abutting the ratchet teeth (7421) against the ratchet groove (7412); The driving sprocket (743) is coaxially fixedly connected to the driving disc (741); The driven sprocket (744) is coaxially fixedly connected to the sewage pump shaft (72); The synchronous chain (745) is sleeved on the driving sprocket (743) and the driven sprocket (744).

8. The dirt removal mechanism according to claim 6, characterized in that: The bottom end of the water outlet (12) is provided with a drainage tube (121) extending downward and abutting against the sealing box, and the drainage tube (121) is provided with a drainage groove (1211) communicating with the clean water chamber, and the water pump assembly comprises a water pump motor (31) and an impeller (32); The water pumping motor (31) is arranged in the sealing box, and the output shaft of the water pumping motor (31) passes through the sealing box and extends into the drainage tube (121); The impeller (32) is coaxially arranged on the output shaft of the water pump motor (31) and is higher than the drainage groove (1211).

9. A swimming pool cleaning robot, characterized in that: It comprises a dirt removal mechanism as described in any one of claims 1-3.

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