Automatic cat litter basin screening device

Abstract

The automatic cat litter basin screening device comprises a base, a roller, a supporting seat and a screen mesh, an arc-shaped open groove matched with the roller is formed in the base, the roller is rotationally arranged in the arc-shaped open groove, an open cavity and a first discharge opening penetrating through the side wall of the open cavity are formed in the roller, and the screen mesh is arranged in the open cavity. The supporting seat is slidably arranged on the inner wall, adjacent to the first discharge port, of the open cavity, the screen is rotatably arranged on the side wall of the supporting seat and located at the bottom of the open cavity, and the supporting seat is used for driving the screen to be lifted to the position above the first discharge port, and then the screen can turn over towards the first discharge port and is used for pouring urine into the first discharge port. After the defecation of the screen is completed, the roller can drive the supporting seat and the screen to rotate, and the screen can turn over back to the first discharge hole, so that the supporting seat can drive the screen to reset. According to the embodiment of the invention, the supporting seat drives the screen to lift up, and after defecation in cat litter is screened out, the defecation is poured through overturning of the screen, so that extrusion to the defecation is effectively avoided, and the adhesion condition of the defecation is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pet excrement treatment, in particular to an automatic cat litter box screening device. Background Art

[0002] With the rapid development of the pet market, cats, as popular family pets, are becoming an important part of many families' lives. In order to provide cats with a more hygienic and comfortable living environment, the convenience and efficiency of cleaning cat litter boxes have gradually attracted the attention of pet owners. The traditional manual method of cleaning cat litter is not only time-consuming and labor-intensive, but also easily affects the cleanliness of the home environment and may even cause odor problems. For this reason, the emergence of automatic cat litter boxes provides pet owners with a new solution. The automatic cat litter box can efficiently complete tasks such as cat litter screening and feces cleaning through an integrated mechanical structure and an intelligent operating system, which greatly reduces the daily burden for cat-raising families and optimizes the life experience of cats.

[0003] The automatic cat litter boxes on the market today usually use different screening methods to separate cat litter from fecal masses. The two most common technical solutions are drum screening and scraper screening. The drum screening method is based on a rotating structure. The movement of the drum separates the cat litter and fecal masses into layers, and then uses a screen or comb teeth to separate the fecal masses from the cat litter, and finally directs the fecal masses into a dedicated storage compartment. The scraper screening method uses a motor-driven comb or screen to clean the cat fecal masses through a scraping action and send them to the storage area. Both methods have their own characteristics, but the goal is to improve the automated cleaning capabilities of the cat litter box and to improve the shortcomings of traditional cleaning methods to a certain extent.

[0004] However, these technical solutions still have certain defects in practical applications. The drum screening method is prone to incomplete cleaning because feces may adhere to the screen or drum surface, especially for soft feces that are not completely agglomerated, which further leads to odor residue and maintenance difficulties. Although the scraper screening method simplifies the drum movement in structure, the friction and adhesion problems between the comb teeth and the base still exist. Unagglomerated feces are easy to scatter during the cleaning process and contaminate the inner wall of the equipment. In addition, both methods are not effective in cleaning feces near the back wall of the cat litter box, and it is difficult to achieve full coverage. These problems not only affect the user experience of the automatic cat litter box, but also put higher requirements on the cleaning and maintenance of the equipment. Therefore, the design of the automatic cat litter box urgently needs to be further optimized to achieve more efficient and thorough cleaning effects, and provide pet owners and cats with a better user experience. Summary of the invention

[0005] The invention provides an automatic cat litter box screening device to solve the technical problem that the existing cat litter cleaning device cannot effectively clean feces and urine, resulting in easy generation of odor.

[0006] In order to solve the above technical problems, the present invention provides an automatic cat litter box screening device, including a base, a drum, a support seat and a screen, the base is provided with an arc-shaped opening groove adapted to the drum, the drum is rotatably arranged in the arc-shaped opening groove, an open cavity and a first discharge port penetrating the side wall of the open cavity are provided in the drum, the support seat is slidably arranged on the inner wall of the open cavity adjacent to the first discharge port, the screen is rotatably arranged on the side wall of the support seat, and the screen is located at the bottom of the open cavity, the support seat is used to drive the screen to be lifted to the top of the first discharge port, and the screen will flip toward the first discharge port to pour feces and urine into the first discharge port, when the screen has finished pouring the feces and urine, the drum will drive the support seat and the screen to rotate, and the screen will flip back to the first discharge port, so that the support seat drives the screen to reset.

[0007] Furthermore, a slide groove is provided on the inner wall of the open cavity, the support seat includes a lifting slider slidably arranged in the slide groove and a support member arranged at the bottom of the lifting slider, the screen is rotatably arranged on the support member, and the lifting slider is used to drive the screen to lift.

[0008] Furthermore, the screen includes a first fixed plate, a second fixed plate and a plurality of screen blades, the first fixed plate is rotatably arranged on the inner wall of the support member close to the first discharge port, the two ends of the screen blades are respectively fixedly connected to the first fixed plate and the second fixed plate, the screen blades are evenly arranged between the first fixed plate and the second fixed plate, the screen takes the first fixed plate as the flipping center, and the screen blades are parallel to the flipping direction of the screen.

[0009] Furthermore, the screen also includes a limiting member, which is arranged on the second fixing plate, and a limiting notch matched with the limiting member is opened on the top of the support member, and the limiting member is engaged with the limiting notch.

[0010] Furthermore, it also includes a driver, which includes a first rotating motor arranged on the inner wall of the arc-shaped opening groove and a second rotating motor arranged on the support member, the first rotating motor is drivingly connected to the roller, the second rotating motor is drivingly connected to the second fixed plate, and the rotation axis of the roller is parallel to the first fixed plate.

[0011] Furthermore, the screen blade is an arc-shaped structure, and the screen blade extends from the middle of the screen to both ends to form an asymmetric arc structure.

[0012] Furthermore, when the screen is in the dumping position for defecation and urination, the projection of the first fixing plate vertically projected onto the inner wall of the open cavity is located within the range of the first discharge port, and there is a functional relationship:

[0013] h≥1.5m, wherein h represents the vertical height from the top of the first fixing plate to the top wall of the first discharge port, and m represents the distance between adjacent side walls of the screen blades.

[0014] Furthermore, a horizontal distance x from the lower wall edge of the first discharge port to the side wall of the first fixed plate ranges from 0 to 0.25 m.

[0015] Furthermore, the flipping angle range of the screen is 45°-75°, and the rotation angle of the drum is 0-360°.

[0016] Furthermore, a discharge bin cover is rotatably provided on the first discharge port, the discharge bin cover is adapted to the shape of the drum, and the screen is drivingly connected to the discharge bin cover for opening and closing the first discharge port.

[0017] Compared with the prior art, the automatic cat litter box screening device according to the embodiment of the present invention has the following beneficial effects:

[0018] The embodiment of the present invention arranges a rotatable drum on a base, and arranges a slidable support seat and a flippable screen in an open cavity provided inside the drum. When the feces and urine in the cat litter are screened and cleaned, the support seat slides on the inner wall of the open cavity, driving the screen to be lifted from the cat litter so as to screen out the feces and urine in the cat litter. When the screen reaches above the first discharge port, the support seat stops sliding, and the screen flips toward the first discharge port, so that the screened feces and urine roll into the discharge port by inertia, thereby completing the effective screening and cleaning of the feces and urine. The lifting and screening design of the screen can effectively avoid squeezing the feces and urine in the cat litter and reduce the situation where the feces and urine adhere to the screen, thereby ensuring that the feces and urine are cleaned and the device is kept hygienic. , to ensure health; at the same time, in order to prevent the tiny part of residual feces and urine on the screen from emitting odor, after the feces and urine are dumped, the drum will drive the support seat and the screen to rotate, and the cat litter will slide along the inner wall of the opening due to inertia to break away from the initial position of the support seat and the screen in the open mouth, so that the support seat and the screen can move in the opposite direction and reset to the initial position in the open mouth, and then the drum only needs to continue to rotate so that the support seat and the screen are at the lowest point of the open mouth, and the cat litter can cover the screen again, effectively isolating the residual feces and urine and avoiding the generation of odor. The whole cleaning process is highly automated, which reduces manual intervention, greatly improves the cleaning efficiency of the cat litter box, greatly facilitates users, meets the needs of modern families for smart pet products, and has broad application potential.

[0019] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to better understand the present invention and do not constitute a limitation of the present invention.

[0021] Figure 1 It is a structural schematic diagram of an automatic cat litter box screening device provided by an embodiment of the present invention from an angle;

[0022] Figure 2 is a schematic structural diagram from another angle of the automatic cat litter box screening device provided by an embodiment of the present invention;

[0023] Figure 3 2 is a schematic structural diagram of the automatic cat litter box screening device provided by an embodiment of the present invention from another angle;

[0024] Figure 4 yes Figure 3 Full cross-sectional view in the AA direction;

[0025] Figure 5 is a schematic structural diagram of a drum in an automatic cat litter box screening device provided by an embodiment of the present invention;

[0026] Figure 6 It is a structural schematic diagram of a base in an automatic cat litter box screening device provided by an embodiment of the present invention;

[0027] Figure 7 It is a schematic structural diagram of a support seat in an automatic cat litter box screening device provided by an embodiment of the present invention;

[0028] Figure 8 Schematic diagram of the structure of the screen in the automatic cat litter box screening device provided by an embodiment of the present invention;

[0029] Fig. 9 is a state diagram of the automatic cat litter box screening device provided by an embodiment of the present invention in screening operation;

[0030] Fig.10 is a state diagram of the automatic cat litter box screening device provided by an embodiment of the present invention in a dumping operation;

[0031] Fig.11 is a state diagram of the automatic cat litter box screening device provided by an embodiment of the present invention in a reset operation;

[0032] Fig.12 This is another state diagram of the automatic cat litter box screening device provided by an embodiment of the present invention in a resetting operation.

[0033] In the figure, 10, drum; 11, opening mouth; 12, first discharge port; 13, discharge bin cover; 14, slide slot; 15, first input port; 16, cat litter bin cover; 20, support seat; 21, lifting slider; 22, support member; 23, limiting gap; 30, sieve; 31, first fixed plate; 32, second fixed plate; 33, sieve blade; 34, limiting member; 40, driver; 41, first rotating motor; 42, second rotating motor; 43, sliding motor; 50, base; 51, arc-shaped opening slot; 52, waste bin; 53, second discharge port; 54, cat litter storage bin; 55, second input port. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings and embodiments in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that directional words, such as the terms "middle", "upper", "lower", "inside" and "outside", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, "at least" means one or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise specified and limited, the terms "assemble", "connect", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figure 1-8As shown, an embodiment of the present invention provides an automatic cat litter box screening device, including a base 50, a drum 10, a support seat 20 and a screen 30. The base 50 is provided with an arc-shaped opening groove 51 adapted to the drum 10, the drum 10 is rotatably arranged in the arc-shaped opening groove 51, the drum 10 is provided with an opening cavity 11 and a first discharge port 12 penetrating the side wall of the opening cavity 11, the support seat 20 is slidably arranged on the inner wall of the opening cavity 11 adjacent to the first discharge port 12, and the screen 30 is rotatably arranged in the arc-shaped opening groove 51. It is arranged on the side wall of the support seat 20, and the screen 30 is located at the bottom of the opening 11. The support seat 20 is used to drive the screen 30 to be lifted above the first discharge port 12, and the screen 30 will flip toward the first discharge port 12 to pour the feces and urine into the first discharge port 12. When the screen 30 has poured the feces and urine, the drum 10 will drive the support seat 20 and the screen 30 to rotate, and the screen 30 will flip back to the first discharge port 12, so that the support seat 20 drives the screen 30 to reset.

[0039] The embodiment of the present invention arranges a rotatable drum 10 on a base 50, and arranges a slidable support seat 20 and a flip screen 30 in an open cavity 11 opened inside the drum 10. When screening and cleaning the feces and urine in the cat litter, the support seat 20 will slide on the inner wall of the open cavity 11, driving the screen 30 to be lifted from the cat litter so as to screen out the feces and urine in the cat litter. When the screen 30 reaches above the first discharge port 12, the support seat 20 stops sliding, and the screen 30 will flip toward the first discharge port 12, so that the screened feces and urine roll into the discharge port by inertia, thereby completing the effective screening and cleaning of the feces and urine. The lifting and screening design of the screen 30 can effectively avoid squeezing the feces and urine in the cat litter and reduce the situation where the feces and urine adhere to the screen 30, thereby ensuring that the feces and urine are cleaned and the device is kept sanitary. At the same time, in order to prevent the tiny part of urine and feces remaining on the screen 30 from emitting odor, after the urine and feces are dumped, the drum 10 will drive the support seat 20 and the screen 30 to rotate, and the cat litter will slide along the inner wall of the opening due to inertia to break away from the initial position of the support seat 20 and the screen 30 in the open cavity 11, so that the support seat 20 and the screen 30 can move in the opposite direction and reset to the initial position in the open cavity 11, and then the drum 10 only needs to continue to rotate so that the support seat 20 and the screen 30 are located at the lowest point of the open cavity 11, and the cat litter can cover the screen 30 again, effectively isolating the residual urine and feces and avoiding the generation of odor. The whole cleaning process is highly automated, reducing manual intervention, greatly improving the cleaning efficiency of the cat litter box, greatly facilitating users, meeting the needs of modern families for smart pet products, and having broad application potential.

[0040] Among them, in order to prevent cat litter from falling into the first discharge port 12 when the screen 30 is lifted or the drum 10 is rotated, the design height of the first discharge port 12 is usually set higher than the cat litter storage cutoff line at the bottom of the open cavity 11, which can effectively prevent cat litter from entering the first discharge port 12, thereby avoiding the waste of cat litter. The cat litter cutoff line refers to the highest point position when the cat litter is stacked in the open cavity 11 when it is in a flat state. Usually, during the use of cat litter, the cat litter will be leveled to ensure that the surface of the cat litter is flat and uniform, and the cat litter cutoff line is the maximum height plane of the cat litter accumulation. The screen 30 can be designed in a variety of styles, including straight and arc shapes. It is preferred to use an arc-shaped screen 30 because the arc-shaped structure can better support defecation and reduce the possibility of it falling during the lifting process, thereby improving the screening effect and ease of use.

[0041] In addition, the drum 10 drives the support 22 and the screen 30 to rotate, so that the support 22 drives the screen 30 to perform the reset operation. Since the cat litter is hard, and the screen 30 is connected to the support seat 20 by rotation, when the support seat 20 directly drives the screen 30 to reset, due to the resistance of the cat litter, more effort is often required, which not only increases energy consumption, but also due to the existence of resistance, the reset process of the screen 30 may not be completed smoothly, resulting in the instability or loss of position of the screen 30, affecting the stability and service life of the equipment. Therefore, the design of introducing the rotation of the drum 10 has the following advantages when resetting the support seat 20 and the screen 30: First, the screen 30 is reburied in the cat litter, and the resistance of the cat litter helps to wrap the feces and urine adhering to the screen 30 back into the cat litter, effectively isolating the residual feces and urine and preventing the feces and urine from emitting odor; Second, the resistance during the resetting process of the screen 30 is effectively reduced, avoiding the excessive force required for the support seat 20 to directly drive the screen 30, thereby saving energy consumption, avoiding damage to the screen 30 due to frequent high-intensity loads, and extending the service life of the equipment.

[0042] It should be noted that the purpose of lifting the screen 30 to the top of the first discharge port 12 and then turning it over is to allow the feces and urine accumulated on the screen 30 to obtain sufficient potential energy under the action of gravity, so that it can be smoothly turned over and rolled down by inertia. The higher position design allows the screen 30 to better dock with the discharge port during the turning process, avoiding the failure of feces and urine to be discharged smoothly due to insufficient turning angle or improper position. In this way, feces and urine can smoothly enter the first discharge port 12, thereby more thoroughly removing feces and urine from the screen 30, ensuring the efficiency and thoroughness of the screening effect.

[0043] like Figure 5 and Figure 7As shown, in an optional embodiment of the present invention, a slide groove 14 is provided on the inner wall of the opening cavity 11, and the support seat 20 includes a lifting slider 21 slidably arranged in the slide groove 14 and a support member 22 arranged at the bottom of the lifting slider 21, and the screen 30 is rotatably arranged on the support member 22, and the lifting slider 21 is used to drive the screen 30 to lift.

[0044] Specifically, the matching design of the slide groove 14 and the lifting slider 21, the lifting slider 21 slides in the slide groove 14, can smoothly drive the screen 30 to lift, so that the support seat 20 and the screen 30 have better guidance during the lifting process, avoiding the problems of violent vibration or unstable lifting that may occur in traditional designs, reducing the risk of jamming, ensuring the smooth movement of the screen 30, and improving the reliability and service life of the device.

[0045] It should be noted that the opening 11 not only serves as a passage for pets to enter, but also provides a convenient space for placing and replacing cat litter, so that the cat litter can be evenly laid, which is convenient for daily maintenance and cleaning. This design simplifies the process of replacing cat litter. Users can easily add or replace cat litter without additional operations or complicated steps, thereby improving the efficiency of use and reducing the trouble of cleaning. In addition, the design of the opening 11 helps to keep the cat litter clean and evenly laid, avoids uneven accumulation of cat litter or waste, and improves the overall user experience and sanitary environment.

[0046] like Figure 8 As shown, in an optional embodiment of the present invention, the screen 30 includes a first fixed plate 31, a second fixed plate 32 and a plurality of screen blades 33. The first fixed plate 31 is rotatably arranged on the inner wall of the support 22 close to the first discharge port 12. Both ends of the screen blades 33 are fixedly connected to the first fixed plate 31 and the second fixed plate 32 respectively. The screen blades 33 are evenly arranged between the first fixed plate 31 and the second fixed plate 32. The screen 30 takes the first fixed plate 31 as the flipping center, and the screen blades 33 are parallel to the flipping direction of the screen 30.

[0047] Specifically, the uniform arrangement of the screen blades 33 on the screen 30 ensures that the screen 30 can evenly and effectively screen the feces and urine during the screening process, avoiding uneven screening or over-screening in certain parts. This helps to improve the screening efficiency and ensure that each part of the feces and urine can be cleaned out to avoid omissions. The design of the screen blades 33 being parallel to the flipping direction of the screen 30 further optimizes the rolling direction of the feces and urine. When the screen 30 flips, the direction of the screen blades 33 is relatively consistent with the rolling direction of the feces and urine, thereby reducing the collision of the feces and urine with the screen 30 (such as the cross screen 30). This design can effectively maintain the integrity of the feces and urine, avoid the feces and urine being squeezed, broken or scattered during the screening process, ensure the smooth discharge of the feces and urine, and improve the cleaning effect.

[0048] By rotating the first fixed plate 31 and setting it on the inner wall of the support 22 near the first discharge port 12, the screen 30 is turned around the first fixed plate 31, and the turning path of the screen 30 is optimized. This design saves space and avoids the screen 30 from being lifted too high or occupying too much space, thereby achieving effective use of space. In a limited space such as the opening 11 in the drum 10, the end turning process of the screen 30 can be completed without taking up too much space. Since the center position of the screen 30 is close to one side of the discharge port and the screen 30 will not be lifted too high, the overall structure of the device is more compact and convenient for placement and operation. Through this design, the screen 30 can complete a large-angle turning in a limited space, ensuring that feces and urine can be smoothly discharged into the discharge port, while saving design and installation space, making the application of the device more extensive and improving the adaptability and convenience of the device.

[0049] In general, this design not only improves the screening efficiency and the integrity of urine and feces discharge by rationally arranging the structure and flipping path of the screen 30, but also optimizes the space utilization, so that the device can operate efficiently in a limited space. These designs greatly improve the reliability and service life of the device, while also enhancing the user experience, meeting the needs of modern families for smart pet products.

[0050] like Figure 8 As shown, in an optional embodiment of the present invention, the screen 30 also includes a limit member 34, which is arranged on the second fixed plate 32, and a limit notch 23 matching the limit member 34 is opened on the top of the support member 22, and the limit member 34 is engaged in the limit notch 23.

[0051] Specifically, since the screen 30 is buried in the cat litter, the screen 30 will be affected by the resistance of the cat litter during the lifting process, resulting in the screen 30 being blocked from lifting. If only supported by one side of the first fixed plate 31, the screen 30 may be tilted or unable to be lifted evenly. By setting a limiter 34 on the second fixed plate 32 and engaging it with the limiter notch 23 at the top of the support member 22, the limiter 34 provides additional support force, so that the screen 30 is supported evenly during the lifting process, avoiding the tilting or jamming phenomenon that may be caused by unilateral support. In addition, the limiter 34 is engaged in the limiter notch 23 at the top of the support member 22 to form an additional support point, balancing the forces at both ends of the screen 30, which can significantly improve the stability of the screen 30 during the lifting process, avoid the screen 30 from tilting, shaking or dislocation, and reduce the abnormal noise or unsmooth operation caused by shaking and vibration, thereby ensuring the smooth lifting action of the lifting slider 21.

[0052] like Figure 4As shown, in an optional embodiment of the present invention, a driver 40 is further included, and the driver 40 includes a first rotating motor 41 arranged on the inner wall of the arc-shaped opening groove 51 and a second rotating motor 42 arranged on the support member 22. The first rotating motor 41 is drivingly connected to the drum 10, and the second rotating motor 42 is drivingly connected to the second fixed plate 32, and the rotation axis of the drum 10 is parallel to the first fixed plate 31.

[0053] Specifically, the first rotating motor 41 is connected to the drum 10 by driving, and is solely responsible for the rotation of the drum 10, so as to realize the precise rotation of the drum 10, and facilitate the lifting and dumping operation of the screen 30. At the same time, the movement axis of the drum 10 is parallel to the second fixed plate 32, so as to ensure that the movement trajectory of the screen 30 inside the drum 10 is more stable. The second rotating motor 42 is connected to the second fixed plate 32 of the screen 30 by driving, and independently controls the flipping action of the screen 30. Through this separate drive design, the coordinated cooperation of the rotation of the drum 10 and the flipping action of the screen 30 can be realized, and the operation efficiency and movement accuracy of the device can be improved. In addition, in order to realize the automatic sliding of the lifting slider 21, the driver 40 also includes a sliding motor 43, which is arranged on the side wall of the drum 10 and is connected to the lifting slider 21 by driving. It is used to drive the lifting slider 21 to move up and down on the slide 14.

[0054] Among them, the first fixed plate 31 serves as the turning center of the screen 30, and the rotation axis of the drum 10 is parallel to the second fixed plate 32. When the drum 10 and the screen 30 rotate at the same time, the transmission of the internal force of the drum 10 is more uniform, avoiding the generation of asymmetric torque, and ensuring that the screen 30 maintains a consistent trajectory and angle when turning, thereby reducing the instability or deviation of the screen 30 that may occur during the turning process, and effectively improving the working efficiency and service life of the screen 30. At the same time, the parallel design reduces the asymmetric load on the structure, helps to reduce the friction and wear between the drum 10 and the screen 30, prolongs the overall service life of the equipment, and reduces the maintenance frequency.

[0055] like Figure 8 As shown, in an optional embodiment of the present invention, the screen blade 33 is an arc-shaped structure, and the screen blade 33 extends from the middle of the screen 30 to both ends to form an asymmetric arc structure.

[0056] Specifically, the screening blade 33 is designed in an arc shape, and the arc is of an asymmetric structure, forming a more natural rolling force guidance. During the rolling process of feces, it is guided by the surface of the screening blade 33, shortening the rolling path, enabling the feces to quickly roll into the first discharge port 12, reducing the retention of feces on the screen 30, thereby reducing the cleaning frequency of the screen 30 and enhancing the cleaning effect and user experience of the device. At the same time, the arc-shaped screening blade 33 with an asymmetric arc is adapted to feces of different shapes and sizes. Through the guiding action of the screening blade 33, whether it is granular feces or块状 feces, it can smoothly roll into the first discharge port 12, ensuring stronger versatility of the device. The design of different curvature radii can effectively adjust the force state of feces on the screen 30, making its path during the sliding process more in line with the combined action of natural gravity and centrifugal force. Through the gradually increasing sliding angle, the feces obtain appropriate acceleration, making it slide into the first discharge port 12 more smoothly.

[0057] Herein, for the convenience of explanation, it is stipulated that, with the center of the screen 30 as the boundary, the curvature radius of the screening blade 33 on the side close to the first discharge port 12 is R1, and the curvature radius of the screening blade 33 on the side far from the first discharge port 12 is R2. The arc range of the screening blade 33 is jointly characterized by the curvature radii R1 and R2, and R1≠R2 is satisfied to optimize the force direction and sliding trajectory of feces during the screening process, thereby ensuring that feces enter the first discharge port 12 with higher screening efficiency and accuracy. By introducing the asymmetric curvature radii R1 and R2, the arc-shaped structure design of the screening blade 33 demonstrates significant optimization effects in the following aspects: First, the curvature radius of the screening blade 33 on the side close to the first discharge port 12 is smaller (R1<R2), enabling the feces to obtain a steeper sliding trajectory when approaching the first discharge port 12 during the sliding process, with a more definite force direction, facilitating the rapid sliding of feces towards the first discharge port 12; Second, the curvature radius of the screening blade 33 on the side far from the first discharge port 12 is larger (R2>R1), providing a relatively gentle sliding starting point, which not only avoids the out-of-control sliding of feces due to premature acceleration but also can gradually guide the movement direction of feces.

[0058] In practical applications, it is necessary to preferably design according to the balance between separation efficiency and separation accuracy. If rapid separation is prioritized in a specific application scenario, a smaller curvature radius (R1<R2) on the side close to the first discharge port 12 is more advantageous; while if more attention is paid to the stability and accuracy of the sliding process, a larger curvature radius (R2>R1) on the side far from the first discharge port 12 is more suitable.

[0059] It should be noted that the transition of curvature from R2 to R1 shows a gradual change trend, which is in line with the law of change of speed and acceleration of feces and urine during sliding. This transition design reduces the abrupt resistance and vibration during sliding, thereby ensuring a smoother screening process. And the asymmetric curvature design is not only suitable for granular feces and urine, but also for feces and urine with irregular shapes or heavy weights, it can also achieve efficient separation by optimizing the sliding trajectory and force state. This feature makes the design suitable for the use needs of a variety of pets, further enhancing the versatility of the device.

[0060] like Fig.10 As shown, in an optional embodiment of the present invention, when the screen 30 is in the dumping position for defecation and urination, the projection of the first fixing plate 31 vertically projected onto the inner wall of the opening cavity 11 is located within the range of the first discharge port 12, and there is a functional relationship:

[0061] h≥1.5 m, wherein h represents the vertical height from the top of the first fixing plate 31 to the top wall of the first discharge port 12 , and m represents the distance between the side walls of adjacent screen blades 33 .

[0062] Specifically, when the screen 30 is in the dumping position, the projection of the first fixed plate 31 vertically projected on the side wall of the opening cavity 11 on one side of the first discharge port 12 is completely within the range of the first discharge port 12. Combined with the range design of h ≥ 1.5m, it is ensured that the feces and urine have sufficient falling height and precise landing point after leaving the screen 30, and it can be ensured that the feces and urine screened by the screen 30 can directly roll into the first discharge port 12. Such a structural design can not only effectively prevent the feces and urine from falling back into the cat litter at the bottom of the opening cavity 11 due to the sliding deviation during the screening process, thereby reducing the need for secondary cleaning of the cat litter, improving the reliability of the equipment operation, and improving the cleaning efficiency; it can also ensure that the sliding trajectory of the feces and urine during the screening process is always toward the first discharge port 12, preventing the feces and urine from touching the inner wall of the opening cavity 11 during the sliding process, and preventing the feces and urine from remaining on the side wall to produce odor, thereby improving the hygienic performance of the equipment and user experience.

[0063] Among them, in this design, h represents the vertical height from the top of the first fixed plate 31 to the top wall of the first discharge port 12, and m is the distance between the side walls of adjacent screen blades 33. By setting h≥1.5m, the feces and urine can maintain a certain falling height during the pouring process from the screen 30, so that the distance between the screen 30 and the discharge port is large enough. When the feces and urine fall from the screen 30, there is sufficient gravity acceleration to ensure that it can slide down quickly, avoiding the feces and urine from failing to smoothly pass over the top of the discharge port due to insufficient height and avoiding getting stuck.

[0064] like Fig.10 As shown, in an optional embodiment of the present invention, the horizontal distance x from the lower wall edge of the first discharge port 12 to the side wall of the first fixing plate 31 ranges from 0 to 0.25 m.

[0065] Specifically, the screen 30 uses the first fixed plate 31 as the flipping center. After the feces and urine leave the screen 30 during the flipping process of the screen 30, it will take this as the starting point and fall according to the trajectory of the projectile motion. The first discharge port 12 is opened on the side wall of the opening cavity 11, and the feces and urine passing the lower wall of the first discharge port 12 is the critical condition for passing through the first discharge port 12. The minimum horizontal displacement distance x of the projectile motion of feces and urine (the horizontal distance from the lower wall edge of the first discharge port 12 to the side wall of the first fixed plate 31) is limited to 0-0.25m, which can effectively control the horizontal displacement of feces and urine after leaving the screen 30, thereby ensuring that the feces and urine ball always falls within the range of the lower wall of the discharge port, and will not deviate to hit the side wall of the opening cavity 11, avoiding pollution, odor and equipment cleaning burden.

[0066] Among them, taking a ball of uniform diameter as an example, assuming that its diameter R is slightly larger than the distance m between the side walls of adjacent screen blades 33, the ball of feces and urine cannot just pass through the mesh opening of the screen 30. During the flipping process of the screen 30, even if the ball of feces and urine will break away from the screen 30 and fall vertically, it will still fall on the lower wall of the discharge port, and the ball of feces and urine has a diameter length range of 0.75m located on the lower wall of the discharge port, and only 0.25m of the diameter length is located in the open cavity 11 (the suspended part of the open cavity 11). Due to inertia, the ball of feces and urine will still roll into the discharge port. Therefore, setting the horizontal distance x from the lower wall edge of the first discharge port 12 to the side wall of the first fixed plate 31 to 0-0.25m can ensure that after the feces and urine break away from the screen 30, whether it is a slight projectile movement or a vertical fall, it can accurately fall into the range of the discharge port. By limiting the horizontal movement distance of feces and urination, problems such as blockage, contamination and odor are avoided. At the same time, combined with the effect of inertia, an efficient, reliable and hygienic excretion process is achieved, effectively improving the performance of the equipment and user experience.

[0067] like Figure 9-12 As shown, in an optional embodiment of the present invention, the flip angle range of the screen 30 is 45°-75°, and the rotation angle of the drum 10 is 0-360°.

[0068] Specifically, by setting the flip angle range of the screen 30 to 45°-75° and the rotation angle of the drum 10 to 0-360°, the optional embodiment of the present invention can effectively optimize the whole process of feces and urine screening and excretion, ensuring that feces and urine enter the excretion port smoothly and avoiding blockage or adhesion problems. At the same time, the flexible rotation design of the drum 10 further enhances the applicability and ease of operation of the device, thereby greatly improving the user experience and practicality of the device.

[0069] Among them, the flip angle range of the screen 30 is controlled between 45°-75°. First, to avoid the flip angle of the screen 30 being too small (less than 45°), due to the irregular shape of feces and urine and insufficient rolling inertia, which may cause some feces and urine to be unable to effectively separate from the screen 30 during the flipping process; second, to avoid the flip angle being too large (more than 75°), the feces and urine will fall too close when leaving the screen 30, especially the feces and urine with high viscosity may fall directly vertically on the edge of the first discharge port 12, causing the feces and urine to adhere to the edge of the discharge port, increasing the difficulty of cleaning the equipment, and may affect the normal use of the first discharge port 12, and even cause poor excretion. By setting the flip angle to 45°-75°, while ensuring that the feces and urine can smoothly separate from the screen 30, its landing range can be controlled to avoid abnormalities in the excretion process caused by landing points that are too close or too far.

[0070] The drum 10 can rotate within the range of 0-360°, allowing it to rotate freely at a large angle to adapt to the reset requirements of the screen 30 and the support seat 20 in different working states. Whether it is the return of the screen 30 after the flip is completed, or the adjustment of the support seat 20 in different tilt states of the equipment, the flexible rotation of the drum 10 can ensure the smooth operation of the equipment.

[0071] It should be noted that the drum 10 not only supports a wide range of 0-360° unidirectional rotation, but also can realize clockwise and counterclockwise bidirectional switching. This feature enables the device to flexibly adjust the movement direction of the drum 10 during use, so as to adapt to different scenarios and needs, and improve the flexibility and adaptability of the device operation. For example, when it is necessary to adjust the flatness of the cat litter at the bottom of the open mouth 11, the drum 10 only needs to make a small reciprocating rotation to achieve the leveling of the cat litter. This design can effectively avoid uneven accumulation of cat litter at the bottom of the open mouth 11, ensure the flatness of the cat litter surface, and thus improve the use effect and user experience of the equipment.

[0072] like Figure 9-12 As shown, in an optional embodiment of the present invention, a discharge bin cover 13 is rotatably provided on the first discharge port 12 , the discharge bin cover 13 is adapted to the shape of the drum 10 , and the screen 30 is drivingly connected to the discharge bin cover 13 for opening and closing the first discharge port 12 .

[0073] Specifically, by setting the discharge bin cover 13 on the first discharge port 12, it can be sealed when the feces and urine are not being dumped, and the surrounding environment can be kept fresh, which is particularly suitable for use in a home environment, reducing the odor problem generated during the cleaning process and improving the user's comfort. At the same time, the discharge bin cover 13 is kept closed in a non-working state to prevent the drum 10 from taking cat litter out of the opening 11 due to inertia or other factors when rotating, so as to keep the cat litter in the opening 11 clean and the external environment of the equipment hygienic, reduce the waste of cat litter, improve the use efficiency of cat litter, and reduce the difficulty of cleaning.

[0074] The shape of the discharge bin cover 13 is compatible with the drum 10, and the compatible design fully considers the actual need of the drum 10 to rotate at a large angle in the equipment, so that the discharge bin cover 13 can maintain a close fit with the drum 10, avoiding the problem of the drum 10 being blocked or rotating poorly due to the unevenness of the connection of the discharge bin cover 13, thereby ensuring the stability and reliability of the equipment operation. In addition, the drive connection method between the discharge bin cover 13 and the screen 30 can adopt a variety of forms, including but not limited to connecting rod connection drive, pneumatic drive, etc. The specific selection can be adjusted according to the design requirements and use environment of the equipment, thereby increasing the applicability. The drive connection realizes the automatic control of the linkage between the discharge bin cover 13 and the screen 30, avoiding manual intervention, and improving the convenience and intelligence level of the equipment operation.

[0075] At the same time, in order to improve the automation of the automatic cat litter box screening device and replenish the cat litter in time when the use of cat litter is reduced, a cat litter storage bin 54 is set on the base 50, and a first input port 15 connected to the opening 11 is opened on the drum 10. The cat litter storage bin 54 passes through the second input port 55 running through the inner wall thereof, the first input port 15 corresponds to the second input port 55, and the cat litter bin cover 16 is hinged on the first input port 15, and the design of the cat litter bin cover 16 can be adapted to the swing member connection mode of the excretion bin cover 13, so that it can be flexibly opened and closed, ensuring the timely replenishment of cat litter, thereby enhancing the automation function of the device and optimizing the user experience; and in order to avoid the first input port 15 and the second input port 55 being disconnected when the drum 10 rotates, and the cat litter in the cat litter storage bin 54 falling out from the second input port 55, a corresponding bin cover can also be adaptively set on the second input port 55. In addition, in order to facilitate the centralized screening of defecation and urination, a waste bin 52 is designed on the base 50, and a through second excretion port 53 is opened on its side wall. The first discharge port 12 corresponds to the second discharge port 53. When the screen 30 is in the dumping position, the first discharge port 12 is connected to the second discharge port 53 to achieve centralized discharge of feces and urine.

[0076] like Figure 9-12As shown, the automatic cat litter box screening device provided by the embodiment of the present invention can be applied to a variety of work scenarios such as home pet care, pet shops, and animal shelters, providing users with an efficient, convenient, automated, and clean cat litter cleaning device. When using the automatic cat litter box screening device, the user can achieve the effective isolation of the dumping of feces and urine and odor by controlling the flipping of the screen 30. Its actual working process includes: first, the screening operation, the support seat 20 will slide on the inner wall of the opening 11, driving the screen 30 to lift from the cat litter, so as to screen out the feces and urine in the cat litter; second, the dumping operation, when the screen 30 reaches above the first discharge port 12, the support seat 20 stops sliding, the discharge bin cover 13 opens, and the screen 30 flips toward the first discharge port 12, so that the screened feces and urine roll into the discharge port by inertia, from The third is the reset operation. After the excrement is dumped, the excretion bin cover 13 is closed, and the drum 10 drives the support seat 20 and the screen 30 to rotate. The cat litter will slide along the inner wall of the opening due to inertia to separate from the initial position of the support seat 20 and the screen 30 in the open cavity 11, so that the support seat 20 and the screen 30 move in the opposite direction to reset to the initial position in the open cavity 11. Then the drum 10 only needs to continue to rotate so that the support seat 20 and the screen 30 are located at the lowest point of the open cavity 11, and the cat litter can cover the screen 30 again, effectively isolating the residual excrement and avoiding the generation of odor. At the same time, when the screen 30 is reset to the lowest point of the open cavity 11, in order to ensure the flatness of the cat litter stored at the bottom of the open cavity 11, the drum 10 can also make a small reciprocating rotation to achieve the leveling of the cat litter. This design can effectively prevent the cat litter from being unevenly piled at the bottom of the open cavity 11, ensure the flatness of the cat litter surface, and thus improve the use effect and user experience of the equipment.

[0077] The lifting and screening design of the screen 30 can effectively avoid squeezing of feces and urine, and reduce the adhesion of feces and urine to the screen 30, thereby ensuring that the feces and urine are cleaned up, maintaining the hygiene of the device, and ensuring health. The entire cleaning process is highly automated, reducing manual intervention, and can significantly improve the cleaning efficiency of the cat litter box, providing great convenience for users, meeting the needs of modern families for smart pet products, and has broad application prospects.

[0078] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic cat litter box screening device, characterized in that: The utility model comprises a base, a roller, a support seat and a screen, wherein the base is provided with an arc-shaped opening groove matched with the roller, the roller is rotatably arranged in the arc-shaped opening groove, an open cavity and a first discharge port penetrating through the side wall of the open cavity are provided in the roller, the support seat is slidably arranged on the inner wall of the open cavity adjacent to the first discharge port, the screen is rotatably arranged on the side wall of the support seat, and the screen is located at the bottom of the open cavity, the support seat is used to drive the screen to be lifted to the top of the first discharge port, and the screen will flip toward the first discharge port to pour feces and urine into the first discharge port, when the screen has finished pouring the feces and urine, the roller will drive the support seat and the screen to rotate, and the screen will flip back to the first discharge port, so that the support seat can drive the screen to reset.

2. The automatic cat litter box screening device according to claim 1, characterized in that: A slide groove is provided on the inner wall of the open cavity, and the support seat includes a lifting slider slidably arranged in the slide groove and a support member arranged at the bottom of the lifting slider, the screen is rotatably arranged on the support member, and the lifting slider is used to drive the screen to lift.

3. The automatic cat litter box screening device according to claim 2, characterized in that: The screen includes a first fixed plate, a second fixed plate and a plurality of screen blades. The first fixed plate is rotatably arranged on the inner wall of the support member close to the first discharge port. Both ends of the screen blades are fixedly connected to the first fixed plate and the second fixed plate respectively. The screen blades are evenly arranged between the first fixed plate and the second fixed plate. The screen takes the first fixed plate as the flipping center, and the screen blades are parallel to the flipping direction of the screen.

4. The automatic cat litter box screening device according to claim 3, characterized in that: The screen also includes a limiting member, which is arranged on the second fixing plate. A limiting notch matched with the limiting member is formed on the top of the support member, and the limiting member is engaged with the limiting notch.

5. The automatic cat litter box screening device according to claim 3, characterized in that: It also includes a driver, which includes a first rotating motor arranged on the inner wall of the arc-shaped opening groove and a second rotating motor arranged on the support member, the first rotating motor is drivingly connected to the roller, the second rotating motor is drivingly connected to the second fixed plate, and the rotation axis of the roller is parallel to the first fixed plate.

6. The automatic cat litter box screening device according to claim 3, characterized in that: The screen blade is an arc-shaped structure, and the screen blade extends from the middle of the screen to both ends to form an asymmetric arc structure.

7. The automatic cat litter box screening device according to claim 3, characterized in that: When the screen is in the dumping position for defecation and urination, the projection of the first fixing plate vertically projected onto the inner wall of the open cavity is located within the range of the first discharge port, and there is a functional relationship: h≥1.5m, wherein h represents the vertical height from the top of the first fixing plate to the top wall of the first discharge port, and m represents the distance between adjacent side walls of the screen blades.

8. The automatic cat litter box screening device according to claim 7, characterized in that: The horizontal distance x from the lower wall edge of the first discharge port to the side wall of the first fixed plate ranges from 0 to 0.25 m.

9. The automatic cat litter box screening device according to claim 7, characterized in that: The flipping angle of the screen is in the range of 45°-75°, and the rotation angle of the drum is in the range of 0°-360°.

10. The automatic cat litter box screening device according to claim 1, characterized in that: A discharge bin cover is rotatably provided on the first discharge port, the discharge bin cover is adapted to the shape of the drum, and the screen is drivingly connected to the discharge bin cover for opening and closing the first discharge port.

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