Drum for separating cat litter from cat feces

Abstract

The application discloses a drum for separating cat litter and cat excrement, which comprises a drum body and a screen plate, the drum body is provided with a sand holding cavity, and an exit and an excrement outlet are arranged on the drum body and communicate with the sand holding cavity; the screen plate is provided with a connecting end and a movable end, and a screen hole is arranged on the screen plate and close to the movable end; the connecting end is connected with the drum body, and the movable end has a first position and a second position relative to the drum body; when the movable end is at the first position, a temporary storage bin is defined between the screen plate and the drum body, and the temporary storage bin and the excrement outlet are located on the two sides of the connecting end; the movable end is rotated by a certain angle around the connecting end and then moves to the second position; the drum further comprises a driving mechanism connected with the drum body, and the driving mechanism is used for driving the screen plate to rotate around the connecting end so as to switch the movable end between the first position and the second position. The application can avoid the cat's hair from being stained with the dirt and improve the user experience.

Description

Technical Field

[0001] This invention relates to the field of pet supplies technology, specifically to a roller for separating cat litter and cat feces. Background Technology

[0002] With the increasing popularity of cats as family pets, more and more people are keeping them. However, the issue of cat elimination has always been a concern for owners. While cats, unlike dogs, don't require training to use a litter box, if the litter box isn't cleaned promptly, the cat will either be unable to defecate or will defecate indiscriminately. Furthermore, cat excrement often has a strong odor and contains a large number of bacteria and viruses, causing numerous health problems and hygiene annoyances for owners.

[0003] Because cats have the physiological habit of burying their excrement in the litter box after defecating, owners typically provide their cats with a dedicated litter box. Early litter boxes required manual cleaning of the feces, which could cause discomfort for owners. To avoid this discomfort, some litter boxes now exist that can automatically clean the litter box.

[0004] For example, Chinese invention patent application CN111436376A discloses a smart cat litter box that can use strip-shaped cat litter, including an arc-shaped cover, an upper L-arm, a base, and a central ball chamber. The upper L-arm includes an infrared liveness detection device, an LED lighting device inside the ball chamber, and an air inlet for an air deodorization and filtration device in the ball chamber. The base integrates a waste disposal chamber, an air deodorization and filtration device and its outlet, and a PCB motherboard assembly. The waste disposal chamber includes a water injection unit and a drainage unit, and is equipped with a shredder and a water level detection device. The PCB motherboard assembly includes multiple PCBs, as well as a Wi-Fi unit, a microcontroller, and a Hall sensor embedded on them. The PCB motherboard assembly integrates a control system that can be controlled by a wireless... The device is operated via a wired connection to a mobile phone. The central spherical compartment has an opening at the top, containing a litter bin enclosure. The bottom is coated with a non-stick coating, and strips of litter are laid on top of this coating. The rear of the spherical compartment houses a rotating motor and drive unit, while the front contains a door assembly consisting of a door, an electromagnetic lock, and an electromagnetic magnet. Additionally, this smart litter box for use with strips of litter includes a hinge connecting the upper L-arm to the base, an arc-shaped cover button, a motor mount within the base, a wiring harness interface for the spherical compartment, and a wiring harness interface for the base. This smart litter box uses dissolvable strip-shaped litter, producing minimal dust, and the strip particles are not easily carried out by the cat after use. The litter bin enclosure enclosure consists of two parts: a closed area and a strip-shaped grid area.

[0005] Many mainstream smart litter boxes on the market are similar to the patent application example above, employing a roller-type structural design, including a cylinder 1 (corresponding to the ball chamber in related technologies) and a sieve plate 2 (corresponding to the isolation grid in related technologies). The sieve plate divides the internal space of the cylinder 1 into two parts: a litter chamber 3 and a temporary storage chamber 4. Cat litter 5 is laid at the bottom of the litter chamber 3, and the cat's defecation process takes place in the litter chamber. Its cross-sectional structure is shown in [reference needed]. Figure 1 As shown. After the cat buries its feces, it clumps together with the litter. Once the cat leaves, a motor drives the cylinder to rotate clockwise. When the litter comes into contact with the sieve plate, the unclumped litter enters the temporary storage chamber through the holes, while the large clumps of feces and litter are blocked. As the cylinder continues to rotate clockwise, the large clumps slide along the surface of the sieve plate under the influence of gravity to the waste outlet and are discharged. Then, the cylinder rotates counterclockwise, and under the influence of gravity, the unclumped litter re-enters the litter chamber from the temporary storage chamber, thus removing feces from the litter.

[0006] Because cat feces have a very strong odor, many smart litter boxes use deodorization as a major selling point. To achieve this, the following three solutions are usually adopted: Solution 1: Install active deodorization devices on the smart litter box, such as air purifiers or UV sterilization and deodorization devices; Solution 2: Place aromatherapy diffusers to mask the smell of cat feces; Solution 3: Minimize the time feces remain in the litter box, thereby reducing the amount of odor released into the room.

[0007] When using the above-mentioned scheme three, the existing technology typically activates the cleaning function immediately after the cat leaves the litter box and collects the feces in the collection box. However, this scheme results in a short retention time of feces in the litter, with the surface of the feces still relatively moist. Furthermore, the litter cannot firmly bind with the feces. Therefore, when the feces slide across the sieve, it easily leaves dirt on the sieve surface, especially when the cat has diarrhea or soft stools. When the cat re-enters the litter box to defecate, its fur easily rubs against the dirt adhering to the sieve surface, leading to a very unpleasant user experience.

[0008] Furthermore, because the sieve plate divides the internal space of the cylinder into two, the internal space of the cylinder cannot be used efficiently. During the product design stage, if the volume of the cylinder is increased to prevent dirt from the sieve plate from transferring to the cat's fur, it will lead to increased manufacturing costs. Moreover, increasing the volume of the cylinder will also occupy more indoor space, and the cylinder itself will be more cumbersome, making it inconvenient to move and clean. If a smaller cylinder is used to reduce production costs or space occupation, this will result in very little room for the cat to move around in the litter box, and the cat's fur will be more likely to rub dirt from the sieve plate onto its fur.

[0009] To address the above technical issues, there is an urgent need for a new type of roller for separating cat litter and cat feces, which can effectively prevent dirt from getting onto the cat's fur. It would be even better if it could also make reasonable use of the internal space of the roller. Summary of the Invention

[0010] To address the shortcomings of existing technologies, this invention provides a roller for separating cat litter and cat feces, which can at least partially solve the technical problem of dirt getting on a cat's fur.

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] A roller for separating cat litter and cat feces includes a cylinder and a sieve plate. The cylinder has a litter-collecting cavity, and an inlet / outlet and a feces-discharging port communicating with the litter-collecting cavity. The sieve plate has a connecting end and a movable end. The area of ​​the sieve plate adjacent to the movable end has sieve holes. The connecting end is connected to the cylinder, and the movable end has a first position and a second position relative to the cylinder. When the movable end is in the first position, a temporary storage compartment is defined between the sieve plate and the cylinder. The temporary storage compartment and the feces-discharging port are located on both sides of the connecting end, respectively. The movable end moves from the first position to the second position by rotating a certain angle around the connecting end. The roller also includes a drive mechanism connected to the cylinder, which drives the sieve plate to rotate around the connecting end to switch the movable end between the first position and the second position.

[0013] In some embodiments, the sieve plate has a first surface and a second surface located between a movable end and a connecting end; when the movable end is in a first position, the first surface and the inner wall of the cylinder define a temporary storage compartment; when the movable end is in a second position, the second surface is close to the inner wall of the cylinder.

[0014] In some embodiments, when the movable end is in the second position, the second surface is in contact with the inner wall of the cylinder.

[0015] In some embodiments, the cylinder includes a connecting body, a front cover, and a rear cover. The connecting body is a tubular structure. The front cover and the rear cover are respectively connected to both ends of the connecting body to define a sand-containing cavity. The inlet and outlet are located on the front cover, and the outlet is located on the connecting body. The connecting end is rotatably connected to at least one of the connecting body, the front cover, and the rear cover.

[0016] Furthermore, the two ends of the connecting end are pivotally connected to the front cover and the rear cover, respectively.

[0017] Furthermore, the roller for separating cat litter and cat feces also includes a front pivot and a rear pivot respectively located at both ends of the connecting end. The front end cover has a front pivot hole, and the rear end cover has a rear pivot hole. The front pivot extends into the front pivot hole, and the rear pivot extends into the rear pivot hole and passes through the rear end cover. The drive mechanism is located on the rear end cover or the connecting body and is connected to the rear pivot for transmission.

[0018] Furthermore, the sieve plate is an arc-shaped plate, the inner diameter of the connecting body is equal to the outer diameter of the sieve plate, and the central angle corresponding to the sieve plate is smaller than the central angle corresponding to the connecting body.

[0019] In some embodiments, the cylinder includes a connecting body, a front cover, and a rear cover. The connecting body is an arc plate. The front cover and the rear cover are respectively connected to both ends of the connecting body to form an open sand-collecting cavity. The discharge port is located on the connecting body. The connecting end is rotatably connected to at least one of the connecting body, the front cover, and the rear cover.

[0020] Furthermore, the two ends of the connecting end are pivotally connected to the front cover and the rear cover, respectively.

[0021] Furthermore, the roller for separating cat litter and cat feces also includes a front pivot and a rear pivot respectively located at both ends of the connecting end. The front end cover has a front pivot hole, and the rear end cover has a rear pivot hole. The front pivot extends into the front pivot hole, and the rear pivot extends into the rear pivot hole and passes through the rear end cover. The drive mechanism is located on the rear end cover or the connecting body and is connected to the rear pivot for transmission.

[0022] Furthermore, the sieve plate is an arc-shaped plate, the inner diameter of the connecting body is equal to the outer diameter of the sieve plate, and the central angle corresponding to the sieve plate is smaller than the central angle corresponding to the connecting body.

[0023] Compared with the prior art, the roller provided by the present invention ensures that the surface of the screen plate on which cat feces slides will never come into contact with the cat's fur during use. Therefore, the roller provided by this embodiment can prevent the cat's fur from getting dirty, which is beneficial to improving the user experience. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of existing technology;

[0026] Figure 2 This is a perspective view of Embodiment 1 of the present invention;

[0027] Figure 3 This is yet another perspective view of Embodiment 1 of the present invention;

[0028] Figure 4 This is a cross-sectional view of Embodiment 1 of the present invention;

[0029] Figure 5 yes Figure 4A schematic diagram showing the movable end of the middle sieve plate after it has rotated from the second position to the first position;

[0030] Figure 6 yes Figure 5 A schematic diagram of the cylinder after it has been rotated clockwise.

[0031] Figure 7 yes Figure 6 A schematic diagram showing the cylinder after it has been rotated clockwise by a certain angle.

[0032] Figure 8 yes Figure 7 A schematic diagram showing the cylinder after it has been rotated clockwise by a certain angle.

[0033] Figure 9 yes Figure 8 A magnified view of a portion of point I;

[0034] Figure 10 This is a perspective view of Embodiment 2 of the present invention, in which the sieve plate is located in the second position;

[0035] Figure 11 This is a perspective view of the sieve plate in the first position in Embodiment 2 of the present invention;

[0036] Figure 12 This is another perspective view of the sieve plate in the first position in Embodiment 2 of the present invention;

[0037] Figure 13 This is a structural diagram of the sieve plate in Embodiment 1 or 2 of the present invention;

[0038] Figure 14 This is a cross-sectional view of Embodiment 2 of the present invention;

[0039] Figure 15 yes Figure 14 A schematic diagram showing the movable end of the middle sieve plate after it has rotated from the second position to the first position;

[0040] Figure 16 yes Figure 15 A schematic diagram of the cylinder after it has been rotated clockwise by a certain angle;

[0041] Figure 17 yes Figure 16 A schematic diagram of the cylinder after it has been rotated clockwise by a certain angle;

[0042] Figure 18 This is a schematic diagram of Example 2 where the open opening at the top of the sand-containing cavity is used as the inlet and outlet.

[0043] The annotations in the attached figures are explained as follows:

[0044] In the diagram: 1. Cylinder; 101. Inlet / outlet; 102. Excretion outlet; 103. Connector; 104. Front cover; 1041. Front shaft hole; 105. Rear cover; 2. Sieve plate; 201. Connecting end; 202. Movable end; 203. Sieve hole; 204. First surface; 205. Second surface; 3. Sand collection chamber; 4. Temporary storage chamber; 5. Cat litter; 6. Drive mechanism; 601. Motor; 602. Gear set; 7. Front pivot; 8. Rear pivot; 9. Excrement. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0046] Example 1

[0047] See Figures 2-9 As shown, this embodiment provides a roller for separating cat litter and cat feces, which includes a cylinder 1 and a sieve plate 2. The cylinder 1 has a litter chamber 3, and the cylinder 1 is also provided with an inlet / outlet 101 and a feces outlet 102 communicating with the litter chamber 3. The inlet / outlet 101 is used for cats to enter and exit the litter chamber 3. The sieve plate 2 has a connecting end 201 and a movable end 202. The area of ​​the sieve plate 2 adjacent to the movable end 202 is provided with a plurality of sieve holes 203. The connecting end 201 is rotatably connected to the cylinder 1, and the movable end 202 has a relative position to the cylinder. The cylinder 1 has a first position and a second position. When the movable end 202 is in the first position, a temporary storage chamber 4 is defined between the sieve plate 2 and the cylinder 1. The temporary storage chamber 4 and the discharge port 102 are located on both sides of the connecting end 201, respectively. The movable end 202 moves to the second position by rotating a certain angle around the connecting end 201 from the first position. The cylinder also includes a drive mechanism 6 connected to the cylinder 1. The drive mechanism 6 is used to drive the sieve plate 2 to rotate around the connecting end 201 so that the movable end 202 switches between the first position and the second position.

[0048] like Figure 13 As shown, the sieve holes 203 are evenly distributed on the sieve plate 2 near the movable end 202. The size of the sieve holes 203 is suitable for cat litter to pass through, while large clumps of cat feces and cat litter cannot pass through the sieve holes 203. Depending on the type of cat litter used, the sieve holes 203 can be designed in different shapes, such as round, oval, square, regular hexagonal, and rectangular.

[0049] In this embodiment, the sieve plate 2 has a first surface 204 and a second surface 205 located between the movable end 202 and the connecting end 201. Figure 5As shown, the movable end 202 is in the first position, and the first surface 204 and the inner wall of the cylinder 1 define the temporary storage compartment 4. This temporary storage compartment 4 is used to temporarily store unclumped cat litter. The area of ​​the sieve plate 2 without sieve holes 203 needs to be adapted to the amount of cat litter laid in the litter chamber 3. To prevent the owner from pouring in too much cat litter, graduation lines can be set on the inner wall of the cylinder 1. It should also be noted that when the movable end 202 is in the first position, there is a small gap between the edge of the sieve plate 2 and the inner wall of the cylinder 1. The width of the gap should be smaller than the particle size of the granular cat litter or the diameter of the round strip cat litter, so as to prevent cat litter from leaking out of the temporary storage compartment 4 through the gap between the sieve plate 2 and the cylinder 1.

[0050] In different embodiments, the rotation angle of the movable end 202 during its movement from the first position to the second position can be different. In other words, the position of the movable end 202 in the second position is not limited to the following in this disclosure. Figure 4 The position shown is correct, but in all embodiments, it should be ensured that when the movable end 202 is in the second position, there is sufficient space between the sieve plate 2 and the laid cat litter for the cat to move around. In a preferred embodiment, when the movable end 202 is in the second position, the second surface 205 is adjacent to the inner wall of the cylinder 1, thereby ensuring that the space inside the cylinder 1 can be used reasonably, so that the cat has a large space to move around in the litter chamber 3.

[0051] It is readily understood by those skilled in the art that when the movable end 202 is in the second position, the second surface 205 is in contact with the inner wall of the cylinder 1, and the internal space of the cylinder 1 is maximized. Compared with the prior art, such a structural design is beneficial to ensure that the cylinder 1 has a sufficiently large movable space inside, while making the overall shape of the cylinder 1 smaller, reducing the amount of raw materials used in the manufacturing process, reducing production costs, and also reducing the weight of the cylinder 1, making it easier for users to handle and clean.

[0052] See Figure 2 As shown, in this embodiment, the cylinder 1 includes a connecting body 103, a front cover 104, and a rear cover 105. The connecting body 103 is a cylindrical structure. The front cover 104 and the rear cover 105 are respectively connected to the two ends of the connecting body 103 to define the sand-containing cavity 3. The inlet / outlet 101 is provided on the front cover 104, and the outlet 102 is provided on the connecting body 103. The connecting end 201 is rotatably connected to at least one of the connecting body 103, the front cover 104, and the rear cover 105.

[0053] In this embodiment, the connecting end 201 is pivotally connected to the cylinder 1 by pivoting its two ends to the front cover 104 and the rear cover 105 respectively. To achieve this pivotal connection, the roller for separating cat litter and feces also includes a front pivot 7 and a rear pivot 8 located at both ends of the connecting end 201. The rear pivot 8 rotates synchronously with the connecting end 201. The front cover 104 has a front pivot hole 1041, and the rear cover 105 has a rear pivot hole. The front pivot 7 extends into the front pivot hole 1041, and the rear pivot 8 extends into the rear pivot hole and passes through the rear cover 105. The drive mechanism 6 is located on the rear cover 105 and is connected to the rear pivot 8. In other embodiments, the drive mechanism 6 can also be mounted on the connecting body 103. Those skilled in the art will understand the location of the rear pivot hole and... Figure 3 The rear pivot 8 is adapted to the front and rear pivots, therefore the rear pivot hole is not marked in the figure. In order to reduce wear between the front and rear pivots 8 and the front and rear end caps 105, in some embodiments a bearing or bushing can be installed between the pivot and the end cap.

[0054] like Figure 3 As shown, in this embodiment, the drive mechanism 6 includes a motor 601 and a gear set 602. The motor 601 is located outside the sand-collecting chamber 3 and is mounted on the rear end cover 105. The output shaft of the motor 601 is connected to the rear pivot 8 via the gear set 602. After the motor 601 starts, it drives the rear pivot 8 to rotate, and then the rear pivot 8 drives the screen plate 2 to rotate. In this embodiment, the gear set 602 can also be replaced by a chain or a timing belt. To accurately control the position of the screen plate 2, the motor 601 can be a stepper motor or a servo motor. The drive mechanism 6 in this disclosure is not limited to the structure used in this embodiment. In some embodiments, the drive mechanism 6 can also be a linkage mechanism driven by an electric push rod. Other drive mechanisms 6 that can drive the movable end 202 to rotate around the connecting end 201 can also achieve the purpose of this invention.

[0055] like Figure 13 As shown, in this embodiment, the sieve plate 2 is an arc-shaped plate, and the inner diameter of the connecting body 103 is equal to the outer diameter of the sieve plate 2. This ensures that the second surface 205 of the sieve plate 2 matches the inner wall of the cylinder 1, allowing the second surface 205 to fit seamlessly with the inner wall of the cylinder 1, maximizing the use of the internal space of the cylinder 1. In some embodiments, if it is only necessary to prevent dirt from rubbing off the cat and the issue of reasonable use of the internal space of the cylinder 1 is not considered, the sieve plate 2 can also be a square flat plate.

[0056] Figures 4 to 8 The entire process of cleaning cat feces in this embodiment is shown in sequence. The roller's normal state is as follows: Figure 4As shown, at this time, the movable end 202 is in the second position, and a layer of cat litter 5 is laid at the bottom of the litter chamber 3. The cat can enter the litter chamber 3 through the inlet 101 to defecate. Normally, the cat will actively bury its excrement 9 (i.e., feces) after defecating. When the smart litter box detects that the cat has left the litter chamber 3, it starts the motor 601 and drives the movable end 202 to rotate from the second position to the position shown. Figure 5 In the first position shown, a shuttle-shaped temporary storage chamber 4 is formed between the sieve plate 2 and the cylinder 1, with the movable end 202 positioned above the litter surface. The temporary storage chamber 4 is located on one side of the cat litter 5. Subsequently, the intelligent litter box drives the cylinder 1 to rotate clockwise around its own axis. When the cat litter layer contacts the sieve plate 2, the unclumped cat litter 5 enters the temporary storage chamber 4 through the sieve holes 203, while the clumped cat feces 9 are blocked on the outside of the temporary storage chamber 4. This stage is described in detail below. Figures 5 to 7 As shown; Figures 7 to 8 As shown, when the cylinder 1 continues to rotate clockwise, the cat feces 9 slides down the second surface 205 to the discharge port 102 under the action of gravity, thus expelling the cat feces 9; then the cylinder 1 is driven to rotate counterclockwise to Figure 4 The screen plate 2 is moved back to the second position by the motor 601, which drives the screen plate 2 to return to the second position.

[0057] In this embodiment, the second surface 205 is the surface of the sieve plate 2 that comes into contact with cat feces, while the first surface 204 comes into contact with relatively clean cat litter. Therefore, the first surface 204 can remain clean for a long time. During use, the second surface 205 will never come into contact with the cat's fur. Thus, the roller provided in this embodiment can prevent dirt from getting on the cat's fur, which is beneficial to improving the user experience.

[0058] Example 2

[0059] See Figures 10 to 17 As shown, the difference between this embodiment and Embodiment 1 lies only in the structure of the cylinder 1. In this embodiment, the cylinder 1 includes a connecting body 103, a front end cover 104, and a rear end cover 105. The connecting body 103 is an arc plate. The front end cover 104 and the rear end cover 105 are respectively connected to both ends of the connecting body 103 to form an open litter chamber 3. The excrement outlet 102 is located on the connecting body 103. The connecting end 201 is rotatably connected to at least one of the connecting body 103, the front end cover 104, and the rear end cover 105. The central angle corresponding to the sieve plate 2 is smaller than the central angle corresponding to the connecting body 103, ensuring that there is sufficient space on the connecting body 103 to lay cat litter 5.

[0060] In this embodiment, the sand-containing cavity 3 adopts a top-open structure, and the open opening at the top of the sand-containing cavity 3 can serve as the inlet / outlet 101 (see...). Figure 18 (As shown), in addition, an opening can be made on the front cover 104 as an inlet / outlet 101. In this embodiment, the sand-collecting chamber 3 adopts an open structure design, which facilitates the disassembly, assembly, and cleaning of the sieve plate 2.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A drum for separating cat litter from cat feces, comprising a drum body and a screen plate, the drum body having a litter containing cavity, the drum body further being provided with an inlet and outlet communicating with the litter containing cavity and a feces discharge opening, characterized in that: The screen plate has a connection end and a movable end, a region of the screen plate near the movable end is provided with a screen hole, the screen plate has a first surface and a second surface between the movable end and the connection end; the connection end is connected with the cylinder, and the movable end has a first position and a second position relative to the cylinder; When the movable end is at the first position, the first surface and the inner wall of the cylinder define a cat litter temporary storage bin, and the cat litter temporary storage bin and the defecation port are respectively located on two sides of the connection end; The movable end is moved to the second position by rotating a certain angle around the connection end; when the movable end is at the second position, the second surface is close to the inner wall of the cylinder; The roller further comprises a driving mechanism connected with the cylinder, and the driving mechanism is used to drive the screen plate to rotate around the connection end to switch the movable end between the first position and the second position.

2. The drum for separating cat litter from cat feces according to claim 1, characterized in that: When the movable end is at the second position, the second surface is close to the inner wall of the cylinder.

3. A drum for separating cat litter from cat faeces according to claim 1 or 2, characterised in that: The cylinder comprises a connecting body, a front end cover and a rear end cover, the connecting body is a tubular structure, the front end cover and the rear end cover are connected with two ends of the connecting body respectively to define the sand holding cavity, the inlet is arranged on the front end cover, the defecation port is arranged on the connecting body, and the connection end is rotatably connected with at least one of the connecting body, the front end cover and the rear end cover.

4. The drum for separating cat litter from cat feces according to claim 3, characterized in that: The two ends of the connection end are respectively pivotally connected with the front end cover and the rear end cover.

5. The drum for separating cat litter from cat feces according to claim 4, characterized in that: Further comprising a front pivot shaft and a rear pivot shaft arranged at the two ends of the connection end respectively, the front end cover is provided with a front shaft hole, the rear end cover is provided with a rear shaft hole, the front pivot shaft extends into the front shaft hole, the rear pivot shaft extends into the rear shaft hole and penetrates through the rear end cover, and the driving mechanism is arranged on the rear end cover or the connecting body and is in transmission connection with the rear pivot shaft.

6. The drum for separating cat litter from cat feces according to claim 3, characterized in that: The screen plate is an arc-shaped plate, and the inner diameter of the connecting body is equal to the outer diameter of the screen plate.

7. The drum for separating cat litter from cat feces according to claim 1 or 2, characterized in that: The cylinder comprises a connecting body, a front end cover and a rear end cover, the connecting body is an arc-shaped plate, the front end cover and the rear end cover are connected with two ends of the connecting body respectively and constitute an open sand holding cavity, the defecation port is arranged on the connecting body, and the connection end is rotatably connected with at least one of the connecting body, the front end cover and the rear end cover.

8. The drum for separating cat litter from cat feces according to claim 6, characterized in that: The two ends of the connection end are respectively pivotally connected with the front end cover and the rear end cover.

9. The drum for separating cat litter from cat feces according to claim 7, characterized in that: Further comprising a front pivot shaft and a rear pivot shaft arranged at the two ends of the connection end respectively, the front end cover is provided with a front shaft hole, the rear end cover is provided with a rear shaft hole, the front pivot shaft extends into the front shaft hole, the rear pivot shaft extends into the rear shaft hole and penetrates through the rear end cover, and the driving mechanism is arranged on the rear end cover or the connecting body and is in transmission connection with the rear pivot shaft.

10. The drum for separating cat litter from cat feces according to claim 7, characterized in that: The screen plate is an arc-shaped plate, and the inner diameter of the connecting body is equal to the outer diameter of the screen plate.

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