Sand shovel driving device and pet toilet

Abstract

The utility model relates to a sand shovel driving device and a pet toilet, and the sand shovel driving device is used for driving a sand shovel to move in a sand basin and separating a pet sand block from the sand basin. The sand shovel driving device comprises a mounting block, a first driving arm, a second driving arm and a sand shovel which are rotationally connected in sequence, and a first motor, a second motor and a third motor which are arranged at three rotational joints. The first motor drives the mounting block and the first driving arm to rotate relatively, the second motor drives the first driving arm and the second driving arm to rotate relatively so as to change the included angle between the two driving arms, and the third motor drives the second driving arm and the sand shovel to rotate relatively so as to enable the sand shovel to separate sand blocks at the pouring position in the sand basin. A user installs the sand shovel driving device on a sand basin to form an automatic cleaning pet toilet, the inner wall of the pet toilet is not prone to being contaminated with excrement, the pet toilet is high in practicability, and the pet excrement cleaning process is more convenient, cleaner and more sanitary.

Description

Technical Field

[0001] The utility model relates to the technical field of pet toilets, in particular to a sand shovel driving device and a pet toilet. Background Art

[0002] Pet owners typically equip their pets with a dedicated litter box, such as a cat litter box, to guide their cats to defecate in a designated area. The litter in the litter box forms clumps of wet excrement, making it easier to remove from the dry litter. Because pet excrement has an odor, pet owners need to promptly remove the clumps from the litter box; otherwise, cats will be reluctant to use the litter box.

[0003] Currently, the most common self-cleaning cat litter boxes in the industry are side-drum type litter boxes. Their working principle is that the pet litter is filtered through a filter screen by rotating the litter bin, thereby separating the pet litter from the litter blocks. However, since side-drum cat litter boxes require the litter mixed with pet litter blocks to be turned, excrement can easily stain the inner wall of the cat litter box, requiring frequent cleaning of the inner wall of the cat litter box. Utility Model Content

[0004] Based on this, it is necessary to provide a sand shovel driving device and a pet toilet to address the problem that the excrement of the side-drum cat toilet easily sticks to the inner wall. The sand shovel driving device can drive the sand shovel to move in the litter basin to separate the pet litter blocks from the litter basin. The pet toilet using the sand shovel driving device does not need to turn the pet litter over to achieve the separation of pet litter blocks and pet litter.

[0005] A sand shovel driving device, comprising:

[0006] A mounting block for connecting external devices;

[0007] a first driving arm having a first end and a second end opposite to each other along its axial direction, wherein the first end is rotatably connected to the mounting block;

[0008] a second driving arm having a third end and a fourth end axially opposed to each other, the third end being rotatably connected to the second end, the first driving arm and the second driving arm being capable of relative rotation to change an angle therebetween, thereby changing a linear distance between the first end and the fourth end;

[0009] a sand shovel, rotatably connected to the fourth end;

[0010] The motor group includes a first motor, a second motor and a third motor. The first motor is arranged between the mounting block and the first end, and the first motor drives the first driving arm to rotate relative to the mounting block; the second motor is arranged between the second end and the third end, and the second motor drives the second driving arm to rotate relative to the first driving arm; the third motor is arranged between the fourth end and the sand shovel, and the third motor drives the sand shovel to rotate relative to the second driving arm.

[0011] In one embodiment, one of the mounting block and the first end is provided with a first lug, and the other is provided with a first through-hole, and the first motor is sequentially provided with the first lug and the first through-hole along its axial direction;

[0012] The first motor includes a first fixed end and a first output end that are rotatably connected. The first output end rotates relative to the first fixed end around the central axis of the first motor. One of the first fixed end and the first output end is circumferentially limited by the first lug, and the other is circumferentially limited in the first through hole, so that the first end is rotatably connected to the mounting block.

[0013] In one embodiment, a first clamping plate and a second clamping plate are provided on the side of the mounting block facing away from the first lug, the first clamping plate and the second clamping plate are opposite to each other and spaced apart, the space between the first clamping plate and the second clamping plate forms a clamping groove, and the first clamping plate and the second clamping plate can be deformed to clamp the edge of the sand basin in the clamping groove.

[0014] In one embodiment, one of the second end and the third end is provided with a second lug, and the other end is provided with a second through-hole, and the second motor is provided with the second lug and the second through-hole in sequence along its axial direction;

[0015] The second motor includes a second fixed end and a second output end that are rotatably connected. The second output end rotates relative to the second fixed end around the central axis of the second motor. One of the second fixed end and the second output end is circumferentially limited by the second lug, and the other is circumferentially limited in the second through hole, so that the second end is rotatably connected to the third end.

[0016] In one embodiment, one of the fourth end and the sand shovel is provided with a third lug, and the other is provided with a third through-hole, and the third motor is sequentially provided with the third lug and the third through-hole along its axial direction;

[0017] The third motor includes a third fixed end and a third output end that are rotatably connected. The third output end rotates relative to the third fixed end around the central axis of the third motor. One of the third fixed end and the third output end is circumferentially limited to the third end, and the other is circumferentially limited in the third through hole, so that the third end is rotatably connected to the sand shovel.

[0018] In one embodiment, the sand shovel includes a detachably connected rake body and a connecting member, one side of the connecting member is connected to the edge of the rake body, the other opposite side of the connecting member is rotatably connected to the fourth end, and the connecting member is circumferentially limited to the third fixed end or the third output end;

[0019] The third through hole is formed on one side of the connecting member, and the connecting member is sleeved on the third fixed end through the third through hole; one of the other opposite side of the connecting member and the rake body is provided with a clamping block, and the other side is provided with a clamping slot, and the clamping block is clamped in the clamping slot.

[0020] In one embodiment, the mounting block is equipped with a built-in sensor for sensing the presence of a pet. When a pet approaches the sand shovel driving device, the sensor can send a warning signal.

[0021] In a second aspect, the utility model provides a pet toilet, comprising:

[0022] litter box for pet litter; and

[0023] The sand shovel driving device as described in any of the above embodiments, wherein the sand shovel driving device is installed in the sand basin through the mounting block;

[0024] Under the action of the first motor, the sand shovel is tilted and lifted. During the process of tilting and lifting the sand shovel, the second motor synchronously drives the angle between the first driving arm and the second driving arm to change, and the sand shovel remains against the bottom of the sand basin. The sand shovel moves from one end of the sand basin to the other end; under the action of the third motor, the sand shovel dumps the sand blocks.

[0025] In one embodiment, the pet toilet further includes a collection device, which is detachably mounted on one side of the litter box and is used to collect pet excrement;

[0026] The litter box includes a basin body and a partition, wherein the partition divides the inner cavity of the basin body into an independent first chamber and a second chamber. The first chamber is used to place pet litter, and the second chamber is used to place the collection device.

[0027] In one embodiment, the collection device includes a collection box and a cover plate, the collection box is provided with a collection opening, the cover plate is rotatably connected to the collection box, and the cover plate can be flipped to open and close the collection box; with the cooperation of the first motor, the second motor and the third motor, the sand shovel can be driven to move the cover plate to open the collection box.

[0028] The sand scoop drive device and pet litter box provided by the present invention can drive the sand scoop to move between opposite ends of the litter basin, separating the pet litter and litter blocks within the litter basin, thereby automatically cleaning the pet litter basin. Automatic cleaning of the pet litter basin does not require the litter basin to be flipped over, thus preventing the side walls of the pet litter basin from being contaminated by excrement. Furthermore, because the sand scoop drive device can lift the sand scoop to the outside of the litter basin, it can reduce the risk of spilled litter blocks entering the litter basin and affecting the pet's defecation. Furthermore, because the mounting block, first drive arm, and second drive arm are sequentially rotatably connected to the sand scoop, the sand scoop can be moved to any position within the litter basin, providing a high degree of overall flexibility and adaptability to various usage scenarios. For example, during a pet's defecation, the sand scoop and drive arm can be moved above the litter basin, eliminating the space available to the pet and minimizing the impact of the sand scoop and drive arm on the pet's defecation. When the pet litter basin automatically cleans the litter blocks, the sand scoop can clean all areas of the litter basin, minimizing the chance of litter blocks remaining and ensuring a thorough clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the assembly of a pet toilet according to one embodiment of the present invention;

[0030] Figure 2 for Figure 1 Exploded diagram of the pet toilet;

[0031] Figure 3 for Figure 1 Schematic diagram of the assembly of the litter scoop drive device in the pet litter box;

[0032] Figure 4 for Figure 3 An exploded schematic diagram of the sand shovel drive device shown;

[0033] Figure 5 for Figure 4 Schematic diagram of the structure of the three motors in the sand shovel drive device shown

[0034] Figure 6 for Figure 3 The schematic diagram of the assembly of the sand shovel drive device from another perspective;

[0035] Figure 7 for Figure 6 An exploded schematic diagram of the sand shovel drive device A shown;

[0036] Figure 8 For the Figure 6 Schematic diagram of the cross-sectional structure in the AA direction;

[0037] Figure 9 for Figure 3 The schematic assembly diagram of the sand shovel drive device shown in another perspective.

[0038] Reference numerals

[0039] 10. Pet toilet;

[0040] 100, sand basin; 110, basin body; 120, partition; 101, first chamber; 102, second chamber; 103, notch;

[0041] 200, collecting device; 210, collecting box; 220, cover plate; 201, collecting opening;

[0042] 300, shovel drive device; 310, mounting block; 311, first lug; 312, first mounting slot; 313, first clamping plate; 314, second clamping plate; 315, clamping slot; 320, first drive arm; 321, first end; 322, second end; 323, first through-hole; 324, second lug; 325, second mounting slot; 326, avoidance slot; 327, avoidance space; 330, second drive arm; 331, third end; 332, fourth end; 333, second through-hole; 334, Third lug; 335, third mounting slot; 340, sand shovel; 341, rake body; 3411, sieve hole; 3412, slot; 342, connector; 3421, third through-hole; 3422, snap-in block; 350, motor group; 351, first motor; 3511, first fixed end; 3512, first output end; 352, second motor; 3521, second fixed end; 3522, second output end; 353, third motor; 3531, third fixed end; 3532, third output end. DETAILED DESCRIPTION

[0043] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0046] Reference Attachment Figure 1 The present invention provides a pet toilet 10 with an automatic cleaning function, capable of separating pet litter and pet litter blocks within the pet toilet 10. Pet litter blocks refer to the aggregated sand formed by pet excrement and pet litter after defecation. It is worth noting that the pet toilet 10 can be used as a pet toilet for cats, rabbits, dogs, etc., and the specific pet application is not a limitation of this application.

[0047] Combined with reference to Figure 1 and attached Figure 2 The pet litter box 100 includes a litter tray 100, a collection device 200, and a scoop drive device 300. The litter tray 100 is used to store pet litter, which forms clumps of pet litter (hereinafter referred to as pet litter clumps) as waste products excreted by pets. The collection device 200 is a box-shaped device that is removably mounted on one side of the litter tray 100. The collection device 200 is used to collect and store pet litter clumps. The scoop drive device 300 is removably mounted on the litter tray 100 and is used to separate the pet litter clumps from the litter tray 100 and pour them into the collection device 200. The scoop 340 in the scoop drive device 300 moves between opposite ends of the litter tray 100, separating the pet litter from the pet litter clumps. The scoop drive device 300 also transports the separated pet litter clumps to the collection device 200 for collection, completing the cleaning of the litter tray 100. It is worth noting that the litter box 100, the collection device 200, and the sand scoop driving device 300 can be manufactured and sold separately as independent products or parts. The independently manufactured and sold litter box 100, the collection device 200, and the sand scoop driving device 300 can also be used in combination with other cleaning devices in the field of pet litter box 10.

[0048] In one embodiment, a litter box 100 includes a body 110 and a partition 120. The body 110 serves as a storage chamber, while the partition 120 is placed within the body 110 and divides its interior into two independent chambers: a first chamber 101 and a second chamber 102. The first chamber 101 is used to store pet litter. A notch 103 is defined in the sidewall of the body 110, connecting the first chamber 101 with the outside world. Pets can enter the first chamber 101 through the notch 103 for defecation. The second chamber 102 is used to house a collection device 200, which can be removably installed within the litter box 100. When the collection device 200 has sufficient pet litter, the user can lift it out of the second chamber 102 and remove the litter. It should be understood that in other embodiments, the litter box 100 does not need to be provided with a partition 120, and can be a chamber containing structure. In this case, the collection device 200 can be directly installed on one side of the litter box 100 to collect and place pet litter blocks. Alternatively, the second chamber 102 can be directly used as the collection device 200 to collect and place pet litter blocks. Alternatively, the litter box 100 does not need to be provided with a notch 103, and only needs an opening on the top to allow pets to enter the first chamber 101 for defecation. Therefore, embodiments that only need to meet the requirements that the litter box 100 can place pet litter and allow pets to enter for defecation are all within the scope of protection of this application. That is, in this application, whether the partition 120 is provided or not is not limited, and the setting state of the collection device 200 is not limited.

[0049] In one embodiment, the collection device 200 includes a collection box 210 and a cover 220. The collection box 210 has a collection opening 201 for receiving pet litter separated from the litter box 100. The cover 220 is rotatably connected to the collection box 210 and can be flipped to open and close the collection box 210. Preferably, in this embodiment, a sand shovel 340 is operable to move the cover 220 to open the collection box 210 through the coordinated action of three motors (i.e., a motor group 350 described below: a first motor 351, a second motor 352, and a third motor 353). When the collection device 200 is not in operation, the cover 220 covers the collection opening 201 to reduce the release of pet litter odor into the environment. It should be understood that in other embodiments, the presence of the cover 220 is not a limitation, provided that the release of pet litter odor is not a concern. Alternatively, the collection device 200 may further include a bag feeding mechanism and a sealing mechanism (not shown). The bag feeding mechanism can transport trash bags to the collection opening 201. The trash bags transported to the collection opening 201 can be used to collect the pet litter blocks separated from the litter box 100. The sealing mechanism includes a fixed mounting frame fixed to the collection opening 201. The sealing mechanism can heat-seal the trash bags passing through the collection opening 201 in sections, thereby forming a tubular trash bag into a package of connected trash bags, making it easier to remove and discard and reducing odor. Alternatively, the collection device 200 may be a conduit (not shown) with a crushing mechanism disposed therein. After receiving the pet litter blocks separated by the sand shovel 340, the crushing mechanism can crush the pet litter blocks, and the conduit can direct the crushed pet litter blocks to the sewer of a household toilet. Alternatively, the pet litter box 10 may not be equipped with the collection device 200. By placing the pet litter box 100 next to a household toilet, the sand shovel driving device 300 can directly remove the pet litter blocks separated from the litter box 100 to the household toilet. That is, in the present application, the setting state of the collection device 200 is not limited, and whether the collection device 200 is set or not is not limited.

[0050] Reference Attachment Figure 3 The sand shovel driving device 300 includes a mounting block 310, a first driving arm 320, a second driving arm 330 and a sand shovel 340 connected in sequence. The mounting block 310 is used to connect and install the sand shovel driving device 300 on the sand basin 100 (attached Figure 1The first driving arm 320 has a first end 321 and a second end 322 along its axial direction, and the first end 321 is rotatably connected to the mounting block 310; the second driving arm 330 has a third end 331 and a fourth end 332 along its axial direction, and the third end 331 is rotatably connected to the second end 322. The first driving arm 320 and the second driving arm 330 can rotate relative to each other (fold and unfold) to change the angle between the two, thereby changing the straight-line distance between the first end 321 and the fourth end 332; the sand shovel 340 is used to separate the pet litter blocks in the pet litter and transport them to the collection device 200. The sand shovel 340 is rotatably connected to the fourth end 332. The sand shovel 340 swings relative to the second driving arm 330 to dump the pet litter blocks into the collection device (as shown in the attached figure). Figure 1 shown).

[0051] Combined with reference to Figure 4 and attached Figure 5 The sand shovel driving device 300 also includes a motor group 350, which includes a first motor 351, a second motor 352 and a third motor 353. The axes of the three motors are parallel to each other, and the central axes of the three motors are all perpendicular to the axes of the first driving arm 320 and the second driving arm. The first motor 351 is disposed between the mounting block 310 and the first end 321. The first motor 351 drives the first driving arm 320 to rotate relative to the mounting block 310 about the central axis of the first motor 351. The second motor 352 is disposed between the second end 322 and the third end 331. The second motor 352 drives the second driving arm 330 to rotate relative to the first driving arm 320 about the central axis of the second motor 352, thereby changing the angle between the two driving arms. The third motor 353 is disposed between the fourth end 332 and the sand shovel 340. The third motor 353 drives the sand shovel 340 to rotate and swing relative to the second driving arm 330 about the central axis of the third motor 353, so that the sand shovel 340 dumps the separated pet litter into the collection device 200.

[0052] In addition, the sand shovel driving device 300 also includes a chip (not shown), in which a computer program is written. The chip is used to execute the computer program to coordinate the starting sequence of the motor group 350 (the first motor 351, the second motor 352 and the third motor 353) to achieve the removal of sand blocks.

[0053] In one embodiment, the sand scoop drive 300 further includes a sensor (not shown) built into the mounting block. This sensor is used to detect the presence of a pet (cat or dog). When a pet approaches the sand scoop drive 300 and enters the litter box 100, the sensor emits a warning signal. This allows the pet litter box 100 to receive timely notification of pet defecation, even when the owner is not nearby, and to activate the motor as quickly as possible to self-clean the pet litter box 100. Sensors include, but are not limited to, monitoring devices and buzzer alarms.

[0054] Combined with reference to Figure 1 and attached Figure 6 In order to enable the sand scoop 340 to completely separate the pet litter and pet litter blocks, the fourth end 332 needs to keep the sand scoop 340 against the bottom of the litter basin 100 during the movement between the opposite ends of the litter basin 100. The offset is not absolute offset. For example, there is a slight distance between the sand scoop 340 and the bottom of the litter basin 100, but it does not affect the sand scoop 340 from separating all the pet litter and pet litter block mixtures, and it can also be regarded as offsetting. In addition, when the fourth end 332 moves between the opposite ends of the litter basin 100, the sand scoop 340 can also move from one end of the litter basin 100 to the other opposite end along the length direction, that is, the sand scoop 340 can separate pet litter at any position along the length direction of the litter basin 100. Specifically, under the action of the first motor 351, the sand shovel 340 is tilted and lifted. During the process of the sand shovel 340 being tilted and lifted, the second motor 352 can synchronously drive the angle between the first driving arm 320 and the second driving arm 330 to change. The sand shovel 340 remains against the bottom of the first chamber 101, and the sand shovel moves from one end of the litter basin 100 to the other opposite end. Under the action of the third motor 353, the sand shovel 340 rotates to dump the pet litter into the collection device 200.

[0055] The sand shovel drive device 300 can switch the pet litter box 10 between a working state and a storage state. When in the working state, the sand shovel 340 is against the bottom of the litter box 100; when in the storage state, the first drive arm 320 and the second drive arm 330 rotate to the lowest point of the two (the first end 321 and the fourth end 332) flush with the window of the litter box 100, and the sand shovel 340 also rotates to be flush with the cover plate 220 (such as Figure 1 This allows the first end 321, the fourth end 332, and the sand shovel 340 to be as far away from the first chamber 101 as possible, thereby preventing the pet's excretion space from being occupied and affecting the pet's excretion.

[0056] Combined with reference Figures 4-6The mounting block 310 is provided with two first lugs 311 spaced opposite each other, and a first through-hole 323 is defined at the first end 321. The first motor 351 is sequentially axially penetrated by the first lugs 311 and the first through-hole 323. The gap between the two first lugs 311 forms a first mounting slot 312 for mounting the first motor 351. The first motor 351 includes a first fixed end 3511 and a first output end 3512 that are rotatably connected. The first output end 3512 rotates relative to the first fixed end 3511 about the central axis of the first fixed end 3511. The first fixed end 3511 is inserted into the first lug 311, and the first fixed end 3511 and the first lug 311 are circumferentially limited. The first output end 3512 is penetrated by the first end 321 and circumferentially limited within the first through-hole 323. These structural details ensure that the first end 321 is rotatably connected to the mounting block 310.

[0057] Similarly, refer to the attached Figure 7 and attached Figure 8 The second end 322 is provided with two second lugs 324 spaced opposite each other, and the third end 331 is provided with a second through-hole 333. The second motor 352 is sequentially penetrated by the second lugs 324 and the second through-hole 333 along its axial direction. The gap between the two second lugs 324 forms a second mounting slot 325 for mounting the second motor 352. The second motor 352 includes a second fixed end 3521 and a second output end 3522 that are rotatably connected. The second output end 3522 rotates relative to the second fixed end 3521 about the central axis of the second fixed end 3521. The second fixed end 3521 is inserted into the second lugs 324, and the second fixed end 3521 and the second lugs 324 are circumferentially limited. The second output end 3522 is penetrated by the third end 331 and circumferentially limited within the second through-hole 333. These structural details ensure that the third end 331 is rotatably connected to the second end 322.

[0058] Similarly, refer to the attached Figures 4-6The fourth end 332 is provided with two spaced-apart, opposing third lugs 334. The sand shovel 340 is provided with a third through-hole 3421. The third motor 353 is sequentially passed through the third lugs 334 and the third through-hole 3421 along its axial direction. The gap between the two third lugs 334 forms a third mounting slot 335 for mounting the third motor 353. The third motor 353 includes a rotatably connected third fixed end 3531 and a third output end 3532. The third output end 3532 rotates relative to the third fixed end 3531 about the central axis of the third fixed end 3531. The third fixed end 3531 is inserted into the third lugs 334 and circumferentially restrained with the third lugs 334. The third output end 3532 is passed through the third end 331 and circumferentially restrained within the third through-hole 3421. These structural details ensure that the sand shovel 340 is rotatably connected to the fourth end 332.

[0059] It is worth noting that in this embodiment, the connection details of the sand shovel drive device 300 at the three rotational connection positions and the installation and connection methods of the three motors are the same. Of course, in other embodiments, they can also be different. It should be understood that, first, as long as the rotational connection methods of the adjacent two ends at the three connection positions of the sand shovel drive device 300 (the mounting block 310 and the first end 321, the second end 322 and the third end 331, and the fourth end 332 and the sand shovel 340) are achieved, they should fall within the scope of protection of this application. Then, the lugs and the corresponding perforations are in a mutually complementary relationship. In other embodiments, the implementation effect of this embodiment can be achieved by changing the setting position of the two. Secondly, the fixed end and the output end of the motor are in a relative rotational connection relationship. In other embodiments, the implementation effect of this embodiment can be achieved by changing the position relationship of the circumferential limit connection between the two. In addition, it is worth noting that the motor easily generates heat during operation, so the mounting slot needs to be connected to the outside world. The motor can be equipped with a lug and extend out to the outside environment to dissipate heat. Finally, in other embodiments, the number of lugs can be set to one, in which case the mounting slot does not exist, and one of the input end and output end of the motor is connected to the lug, and the other is connected to the perforation.

[0060] Reference Attachment Figure 4In one embodiment, a first clamping plate 313 and a second clamping plate 314 are provided on the side of the mounting block 310 facing away from the first mounting slot 312. The first clamping plate 313 and the second clamping plate 314 are spaced apart from each other, and the space between the first clamping plate 313 and the second clamping plate 314 forms a clamping slot 315. The first clamping plate 313 and the second clamping plate 314 are deformable to clamp the edge of the sand basin 100 within the clamping slot 315. It should be understood that in other embodiments, the mounting block 310 may be directly provided with a clamping block or clamping slot to engage with the clamping slot or clamping block of the sand basin 100 for mounting. Therefore, the first clamping plate 313 and the second clamping plate 314 are merely one specific method for externally mounting the mounting block 310. As long as the mounting block 310 can be used to mount the shovel drive device 300 on the sand basin 100, all other embodiments are protected by this application.

[0061] Reference Attachment Figure 9 In one embodiment, a relief groove 326 is defined on the outer wall of the first driving arm 320 facing the second driving arm 330. The relief groove 326 communicates with the second mounting groove 325 and, together, forms a relief space 327. During rotation of the second driving arm 330 relative to the first driving arm 320, the second driving arm 330 can enter and exit the relief space 327. It is worth noting that in other embodiments, the second mounting groove 325 is provided on the second driving arm 330. In this case, the relief groove 326 should be defined on the outer wall of the second driving arm 330 facing the first driving arm 320 to ensure that the relief groove 326 communicates with the second mounting groove 325 to form the relief space 327. During rotation of the second driving arm 330 relative to the first driving arm 320, the first driving arm 320 can enter and exit the relief space 327. It should be understood that the relief groove 326 is provided solely to expand the angular range and degree of freedom of relative rotation of the first driving arm 320 and the second driving arm 330. Therefore, without considering the relative rotational freedom of the two driving arms, in this application, there is no limitation on whether the avoidance groove 326 is provided.

[0062] Reference Attachment Figure 3In one embodiment, the radial dimensions of the first and second ends 321, 322 are greater than the radial dimensions of the middle section of the first drive arm 320; the radial dimensions of the third and fourth ends 331, 330 are greater than the radial dimensions of the middle section of the second drive arm 330. As a result, the first and second drive arms 320, 330 appear thicker at the ends and thinner in the middle. It should be noted that the first, second, third, and fourth ends 321, 322, 331, and 332 all require connecting structures to facilitate manufacturing processes such as drilling and grooving. The thinner middle section saves on consumable materials. Furthermore, the first and second drive arms 320, 330 are symmetrical in both the axial and radial directions, creating a beautifully symmetrical appearance. It should be understood that the outer shapes of the first and second drive arms 320, 330 are not limited, without regard to the raw materials or aesthetics of the design.

[0063] In addition, to save effort, in one embodiment (not shown), the length of the first driving arm 320 should be smaller than the length of the second driving arm 330. It should be understood that, without considering whether saving effort is a concern, the relative lengths of the first driving arm 320 and the second driving arm 330 are not limited.

[0064] Combined with reference Figure 3 and attached Figure 4In one embodiment, the sand shovel 340 includes a detachably connected rake body 341 and a connector 342. The rake body 341 serves as the separation and transport body of the sand shovel 340, separating the pet litter clumps from the pet litter for transport. The rake body 341 has a plurality of sieve holes 3411. When the rake body 341 passes through the mixture of pet litter and pet litter clumps, the pet litter can flow from one side of the rake body 341 through the sieve holes 3411 to the other side of the rake body 341. However, the pet litter clumps, due to their relatively large size, cannot pass through the sieve holes 3411 and are filtered to the same side of the rake body 341, thereby separating the pet litter clumps from the pet litter. In other embodiments, the sand shovel 340 can also be configured as a mechanical claw (not shown) that can pick up the pet litter clumps from the pet litter, thereby separating the pet litter from the pet litter clumps. One side of the connecting member 342 is connected to the edge of the rake body 341. The other opposite side of the connecting member 342 is rotatably connected to the fourth end 332. The connecting member 342 is circumferentially limited to the third fixed end 3531. A third through-hole 3421 is provided on one side of the connecting member 342. The connecting member 342 is sleeved onto the third fixed end 3531 through the third through-hole 3421. A latching block 3422 is provided on the opposite side of the connecting member 342, away from the third through-hole 3421. A latching slot 3412 is provided on the edge of the rake body 341. The latching block 3422 engages with the latching slot 3412 with an interference fit, thereby achieving a detachable connection between the connecting member 342 and the rake body 341. It should be understood that the detachable connection between the rake body 341 and the connecting member 342 is primarily intended to facilitate replacement of the rake body 341. The specifications of the rake body 341 may vary for different pet litter boxes 10. This increases the practicality of the entire sand shovel drive device 300 and adapts it to a wider range of usage scenarios. Without considering the need to replace the rake body 341, the rake body 341 and the connecting member 342 can be integrally formed. Furthermore, the interaction between the latching block 3422 and the latching slot 3412 is only one specific embodiment of achieving a detachable connection between the rake body 341 and the connecting member 342. In other embodiments, the same technical effect can be achieved by replacing the positions of the two. Furthermore, in this application, any method of achieving a detachable connection between the rake body 341 and the connecting member 342 should be protected.

[0065] The sand scoop drive device 300 and pet litter box 10 provided by the present invention can drive the sand scoop 340 to move between opposite ends of the litter box 100, separating the pet litter and pet litter blocks within the litter box 100, thereby completing the automatic cleaning of the pet litter box 100. The automatic cleaning of the pet litter box 100 does not require the litter box 100 to be flipped over. Therefore, the side walls of the pet litter box 10 are not easily contaminated by excrement. Furthermore, because the sand scoop drive device 300 can lift the sand scoop 340 to the outside of the litter box 100, it can reduce the odor of the dumped pet litter blocks from flowing into the litter box 100 and affecting the pet's excretion. Furthermore, because the mounting block 310, the first drive arm 320, the second drive arm 330, and the sand scoop 340 are sequentially rotatably connected, the sand scoop 340 can be moved to any position within the litter box 100, providing a high degree of overall freedom and adaptability to a variety of usage scenarios. For example, when a pet is defecating, the scoop 340 and the driving arm can be moved above the litter box, eliminating the space available to the pet in the litter box 100 and reducing the impact of the scoop 340 and the driving arm on the pet's defecation. When the pet toilet 10 automatically cleans the litter, the scoop 340 can clean all areas of the litter box 100, minimizing the chance of litter residue and ensuring a thorough cleaning. After the litter in the litter box 100 is removed, the scoop driving device 300 can further drive the scoop 340 to reciprocate within the litter box 100, thereby leveling the litter within the litter box 100 and preventing the litter from concentrating in a specific area and interfering with the pet's defecation.

[0066] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A sand shovel driving device, characterized in that: include: A mounting block for connecting external devices; a first driving arm having a first end and a second end opposite to each other along its axial direction, wherein the first end is rotatably connected to the mounting block; a second driving arm having a third end and a fourth end axially opposed to each other, the third end being rotatably connected to the second end, the first driving arm and the second driving arm being capable of relative rotation to change an angle therebetween, thereby changing a linear distance between the first end and the fourth end; a sand shovel, rotatably connected to the fourth end; The motor group includes a first motor, a second motor and a third motor. The first motor is arranged between the mounting block and the first end, and the first motor drives the first driving arm to rotate relative to the mounting block; the second motor is arranged between the second end and the third end, and the second motor drives the second driving arm to rotate relative to the first driving arm; the third motor is arranged between the fourth end and the sand shovel, and the third motor drives the sand shovel to rotate relative to the second driving arm.

2. The sand shovel driving device according to claim 1, characterized in that: One of the mounting block and the first end is provided with a first lug, and the other is provided with a first through-hole, and the first motor is sequentially penetrated by the first lug and the first through-hole along its axial direction; The first motor includes a first fixed end and a first output end that are rotatably connected. The first output end rotates relative to the first fixed end around the central axis of the first motor. One of the first fixed end and the first output end is circumferentially limited by the first lug, and the other is circumferentially limited in the first through hole, so that the first end is rotatably connected to the mounting block.

3. The sand shovel driving device according to claim 2, characterized in that: A first clamping plate and a second clamping plate are provided on the side of the mounting block facing away from the first lug, the first clamping plate and the second clamping plate are opposite to each other and spaced apart, the space between the first clamping plate and the second clamping plate forms a clamping groove, and the first clamping plate and the second clamping plate can be deformed to clamp the edge of the sand basin in the clamping groove.

4. The sand shovel driving device according to claim 1, characterized in that: One of the second end and the third end is provided with a second lug, and the other end is provided with a second through-hole, and the second motor is sequentially provided with the second lug and the second through-hole along its axial direction; The second motor includes a second fixed end and a second output end that are rotatably connected. The second output end rotates relative to the second fixed end around the central axis of the second motor. One of the second fixed end and the second output end is circumferentially limited by the second lug, and the other is circumferentially limited in the second through hole, so that the second end is rotatably connected to the third end.

5. The sand shovel driving device according to claim 1, characterized in that: One of the fourth end and the sand shovel is provided with a third lug, and the other is provided with a third through-hole, and the third motor is sequentially provided with the third lug and the third through-hole along its axial direction; The third motor includes a third fixed end and a third output end that are rotatably connected. The third output end rotates relative to the third fixed end around the central axis of the third motor. One of the third fixed end and the third output end is circumferentially limited to the third end, and the other is circumferentially limited in the third through hole, so that the third end is rotatably connected to the sand shovel.

6. The sand shovel driving device according to claim 5, characterized in that: The sand shovel includes a detachably connected rake body and a connecting member, one side of the connecting member is connected to the edge of the rake body, the other opposite side of the connecting member is rotatably connected to the fourth end, and the connecting member is circumferentially limited to the third fixed end or the third output end; The third through hole is formed on one side of the connecting member, and the connecting member is sleeved on the third fixed end through the third through hole; one of the other opposite side of the connecting member and the rake body is provided with a clamping block, and the other is provided with a clamping slot, and the clamping block is clamped in the clamping slot.

7. The sand shovel driving device according to claim 1, characterized in that: The mounting block is equipped with a built-in sensor for sensing the presence of a pet. When a pet approaches the sand shovel driving device, the sensor can send a warning signal.

8. A pet toilet, characterized in that: include: Litter box, used to place pet litter; as well as The sand shovel driving device according to any one of claims 1 to 7, wherein the sand shovel driving device is installed in the sand basin via the mounting block; Under the action of the first motor, the sand shovel is tilted and lifted. During the process of tilting and lifting the sand shovel, the second motor synchronously drives the angle between the first driving arm and the second driving arm to change, and the sand shovel remains against the bottom of the sand basin. The sand shovel moves from one end of the sand basin to the other end; under the action of the third motor, the sand shovel dumps the sand blocks.

9. The pet toilet according to claim 8, characterized in that: The pet toilet further includes a collecting device, which is detachably mounted on one side of the litter box and is used to collect pet excrement; The litter box includes a basin body and a partition, wherein the partition divides the inner cavity of the basin body into an independent first chamber and a second chamber. The first chamber is used to place pet litter, and the second chamber is used to place the collection device.

10. The pet toilet according to claim 9, characterized in that: The collection device includes a collection box and a cover plate. The collection box is provided with a collection opening. The cover plate is rotatably connected to the collection box. The cover plate can be flipped to open and close the collection box. With the cooperation of the first motor, the second motor and the third motor, the sand shovel can be driven to move the cover plate to open the collection box.

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