Automatic cat litter basin

Abstract

The utility model relates to an automatic cat litter basin which comprises a base, a roller, a driven tooth structure, a driving tooth structure and a driving device. The rollers form a central plane perpendicular to the rotating axis of the rollers, and the rollers are symmetrically or approximately symmetrically arranged according to the central plane. The driven tooth structures are arranged on the outer wall of the peripheral side of the roller and extend in the circumferential direction of the roller, and the driven tooth structures are symmetrically arranged according to the center face. And the driving tooth structures are mounted on the base, are symmetrically arranged according to the central plane, and are correspondingly engaged with the driven tooth structures. The guide structure is used for limiting movement of the roller in the rotation axis direction of the roller. The driving device is used for driving the driving tooth structure to move. When the roller is placed on the base, the driven tooth structure is meshed with the driving tooth structure, the driving device can drive the driving tooth structure, and then the roller is driven to rotate around the rotating axis.

Description

Technical Field

[0001] The utility model relates to the field of cat litter boxes, in particular to an automatic cat litter box. Background Art

[0002] Drum-type cat litter boxes rely primarily on the rotation of the drum to filter sand and remove feces. Drum-type cat litter boxes generally have a drum and a base, with a gear drive mechanism on the base and a gear follower mechanism on the outside of the drum to drive the drum to rotate on the base.

[0003] However, existing cat litter boxes of this type have a gear driven structure located on one side of the drum, resulting in an unbalanced force on the drum during rotation, causing the drum to tilt. Therefore, a matching locking structure is required to stabilize the drum and lock it to the base, allowing only rotation. However, the locking structure makes the drum difficult to install and inconvenient to remove. Utility Model Content

[0004] In view of this, the utility model provides an automatic cat litter box, which is used to solve the problems in the prior art of unbalanced force on the drum during rotation and inconvenient disassembly.

[0005] To achieve one, part, or all of the above purposes or other purposes, the present invention proposes:

[0006] An automatic cat litter box, comprising:

[0007] base;

[0008] The roller has a center plane perpendicular to its rotation axis, and the rollers are symmetrical or roughly symmetrically arranged according to the center plane;

[0009] A driven tooth structure is provided on the outer wall of the drum and extends along the circumference of the drum. The driven tooth structure is symmetrically arranged according to the center plane.

[0010] The driving gear structure is installed on the base, the driving gear structure is symmetrically arranged according to the center plane, and the driving gear structure is correspondingly engaged with the driven gear structure;

[0011] A driving device is mounted on the base and is used to drive the driving gear structure to move;

[0012] The guide structure includes a first guide portion and a second guide portion, wherein the first guide portion is provided on the outer wall of the circumference of the drum, and the second guide portion is provided on the base, and the first guide portion and the second guide portion can be cooperatively connected to limit the movement of the drum along the direction of its rotation axis;

[0013] When the drum is placed on the base, the driven tooth structure is engaged with the driving tooth structure, and the driving device can drive the driving tooth structure, thereby driving the drum to rotate around the rotation axis.

[0014] Preferably, at least one of the first guide portion and the second guide portion is provided with a guide slope, and the guide slope is used to guide the first guide portion and the second guide portion to be matched and connected so that the driven tooth structure and the driving tooth structure are engaged.

[0015] Preferably, there are two guiding inclined surfaces, which are respectively arranged on both sides of the first guiding portion, or the two guiding inclined surfaces are respectively arranged on both sides of the second guiding portion.

[0016] Preferably, one of the first guide portion and the second guide portion is configured as a guide groove, and the other is configured as a guide boss, and the guide boss can extend into the guide groove.

[0017] Preferably, a guide wheel is rotatably provided on the base, and the guide wheel can abut against the outer wall of the circumference of the drum;

[0018] The guide groove is arranged on the peripheral outer wall of the drum, and the guide boss is formed on the guide wheel so that the guide wheel extends into the guide groove and abuts against the drum.

[0019] Preferably, the guide groove is provided on the base, and the cross section of the guide groove is wedge-shaped; the guide boss is provided on the peripheral outer wall of the drum, and the cross section of the guide boss is wedge-shaped.

[0020] Preferably, the guide groove is provided on the peripheral outer wall of the drum, the driven tooth structure is provided in the guide groove, the guide boss is the gear tooth of the driving gear structure, and the gear tooth of the driving gear structure can be inserted into the guide groove and meshed with the driven gear structure.

[0021] Preferably, the driven tooth structure is protrudingly provided on the peripheral outer wall of the drum, and at least two limit baffles are provided on the peripheral outer wall of the drum, and the at least two limit baffles are surrounded to form a guide groove;

[0022] At least one of the at least two limiting baffles is detachably connected to the roller.

[0023] Preferably, the base is provided with an inner cavity, the inner cavity includes an inner wall, the driving tooth structure is arranged in the inner cavity, and a limiting gap is formed between the driving tooth structure and the inner wall;

[0024] The at least two limiting baffles include a first baffle and a second baffle. The first baffle can extend into the limiting gap. The second baffle is provided with an anti-foolproof flange, which extends away from the first baffle. The extension length of the anti-foolproof flange is greater than the width of the limiting gap.

[0025] Preferably, the driven tooth structure includes at least one driven rack, all of which are arranged on the outer wall of the circumference of the drum, and all of which form a symmetrical structure symmetrical about the central plane; the driving tooth structure includes driving gears, the number of which corresponds to the number of driven racks, and the driving gears mesh with the driven racks;

[0026] The base has a front wall and a rear wall. An avoidance groove is provided on the base corresponding to the driven rack. The avoidance groove is connected to the front wall and the rear wall. The driven rack extends into the avoidance groove. There is an avoidance gap between the bottom wall of the avoidance groove and the driven rack.

[0027] The implementation of the present invention will have the following beneficial effects:

[0028] With this litter box, the driven and driving gear structures are symmetrical about the center plane, ensuring balanced force when the drum is driven. This eliminates the need for additional locking mechanisms to lock the drum's position, allowing the drum to be lifted directly from the base or placed directly on the base for normal use. Furthermore, a guide structure is provided to limit movement of the drum along its rotational axis, maintaining reliable meshing between the driven and driving gear structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 The overall structure of an embodiment is shown in FIG. Figure 1 .

[0031] Figure 2 The overall structure of an embodiment is shown in FIG. Figure 2 ;

[0032] Figure 3 FIG1 is a schematic diagram of an exploded assembly between a drum and a base in one embodiment;

[0033] Figure 4 A partial cross-sectional structural diagram of an embodiment;

[0034] Figure 5 for Figure 4 Enlarged view of the A site;

[0035] Figure 6 Schematic diagram of the drum structure of an embodiment, showing the detachable state of the first baffle;

[0036] Figure 7 A schematic diagram of the vertical cross-section structure of an embodiment Figure 1 , which shows the angle relationship between the first connecting line, the second connecting line and the reference line;

[0037] Figure 8 A schematic diagram of the vertical cross-section structure of an embodiment Figure 2 , which shows the positional relationship between the first contact point, the second contact point and the center of gravity of the drum;

[0038] Figure 9 This is a schematic diagram of the base structure of an embodiment;

[0039] Figure 10 Schematic diagram of the installation between the roller structure and the installation groove in one embodiment;

[0040] Figure 11 is a schematic diagram of the overall structure of another embodiment, which shows that the driven gear structure has two driven racks;

[0041] Figure 12 is a schematic diagram of the overall structure of another embodiment, which shows a possible arrangement of the guide structure;

[0042] Figure 13 For Figure 12 The overall structural diagram of other embodiments juxtaposed with the illustrated embodiment, wherein another possible arrangement of the guide structure is shown;

[0043] Figure 14 FIG1 is a schematic diagram of an embodiment in which the cross sections of the guide boss and the guide groove are both V-shaped;

[0044] Figure 15 A schematic diagram of a guide structure of yet another embodiment;

[0045] Figure 16 A schematic diagram of a guide structure of another embodiment;

[0046] Figure 17 A schematic diagram of an embodiment in which the entry surface faces upward;

[0047] in:

[0048] Base 1, bottom shell 11, supporting mechanism 12, inner cavity 13, limiting gap 14, guide wheel 15, avoidance groove 16, bottom wall 161 of avoidance groove, front wall 17, rear wall 18, avoidance gap 19, rotation groove 111, mounting groove 112, limiting reinforcement rib 113, roller assembly 121, inner wall 131, roller structure 1210, connecting seat 12101, abutting wheel 12102, first roller assembly 1211, second roller assembly 1212, auxiliary roller assembly 1213;

[0049] Drum 2, circumferential outer wall 20, rotation axis 2000, limit baffle 22, center plane 200, first baffle 221, second baffle 222, foolproof flange 223, first contact point 201, second contact point 202, lowest point 203, first connecting line 204, second connecting line 205, reference line 206, center of gravity 207 of drum, working chamber 208, entry surface 209, inlet 2091;

[0050] Driven gear structure 3, driven rack 31, gear teeth 300 of the driven gear structure;

[0051] Driving device 4, output terminal 41;

[0052] Drive gear structure 5, drive gear 51, gear teeth 500 of the drive gear structure;

[0053] The guide structure 6 , the first guide portion 61 , the second guide portion 62 , the guide slope 63 , the guide groove 601 , and the guide boss 602 . DETAILED DESCRIPTION

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains; the terms used in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this invention; the terms "including" and "having" and any variations thereof in the specification and claims of this invention and the accompanying drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" and the like in the specification and claims of this invention and the accompanying drawings are used to distinguish different objects, not to describe a specific order.

[0055] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0057] See attached Figures 1 to 17 The utility model provides an automatic cat litter box, which includes a base 1, a drum 2, a driven gear structure 3, a driving device 4 and a driving gear structure 5.

[0058] The drum 2 is perpendicular to its rotation axis 200 to form a center plane 200. The center plane 200 is as shown in the following figure. Figure 1 、 6 As shown in Figures 1 and 11 , the drum 2 is arranged symmetrically or approximately symmetrically with respect to the center plane 200 .

[0059] The driven tooth structure 3 is arranged on the peripheral outer wall 20 of the drum 2, and the driven tooth structure 3 extends along the circumference of the drum 2. In addition, the driven tooth structure 3 is also symmetrically arranged according to the center plane 200. The driven tooth structure 3 can be as shown in the attached figure. Figure 1 The driven rack 31 shown in FIG. Figure 11 The two driven racks 31 shown are shown. By analogy, the driven gear structure can also be three, four or more driven racks 31.

[0060] The driving device 4 is mounted on the base 1 and has an output end 41. The driving device 4 is preferably a motor, and the output end 41 is the output shaft of the motor.

[0061] The driving tooth structure 5 is mounted at the output end 41 and is also symmetrically arranged with respect to the center plane 200. The driving tooth structure 5 meshes with the driven tooth structure 3, and the driving tooth structure 5 and the driven tooth structure 3 together constitute a driving structure for the drum 2.

[0062] When the drum 2 is correctly placed on the base 1, the driven tooth structure 3 is engaged with the driving tooth structure 5, so that the driving device 4 drives the drum 2 to rotate around its own rotation axis 2000 to perform the function of sand filtering and cleaning.

[0063] Specifically, because the driven gear structure 3 and the driving gear structure 5 are symmetrical about the center plane 200, the forces acting on the drum 2 are balanced when the drum 2 is driven to rotate. This eliminates the need for an additional locking mechanism to lock the position of the drum 2, allowing the drum 2 to be lifted directly from the base 1 without unlocking. Alternatively, once the drum 2 is properly placed on the base 1, the driven gear structure 3 and the driving gear structure 5 engage, allowing for immediate normal use. Consequently, the automatic cat litter box offers the advantages of easy disassembly and cleaning, while maintaining the balance of the drum 2.

[0064] Furthermore, to reduce friction between the drum 2 and the base 1, the base 1 includes a bottom shell 11 and a support mechanism 12. The support mechanism 12 is mounted on the bottom shell 11 and is used to support the drum 2. Specifically, the support mechanism 12 includes multiple roller assemblies 121. Each of the roller assemblies 121 is mounted on the bottom shell 11 and positioned below the drum 2. The roller assemblies 121 are arranged along the circumference of the drum 2 and abut against the outer wall 20 of the drum 2. In this automatic cat litter box, the multiple roller assemblies 121 collectively support the drum 2. This reduces the contact area between the drum 2 and the bottom shell 11, making it easier to control the rotation of the drum 2. Furthermore, the roller assemblies 121 are in rolling contact with each other, and rolling friction reduces the kinetic energy loss of the drum 2. Specifically, each roller assembly 121 includes a plurality of abutment wheels 12102, and the number of abutment wheels 12102 is even. The abutment wheels 12102 contact the peripheral outer wall 20 of the drum 2 , and the several abutment wheels 12102 included in each roller assembly 121 also need to be symmetrically arranged according to the center plane 200 , mainly to ensure the force balance of the drum 2 .

[0065] Regarding the driven tooth structure 3 and the driving tooth structure 5, in one embodiment, as shown in the attached Figure 1 As shown, the driven tooth structure 3 includes only one driven rack 31, which is arranged in the middle of the peripheral outer wall 20 of the drum 2, that is, the driven rack 31 passes through the center plane 200; the driving tooth structure 5 correspondingly includes only one driving gear 51, which is arranged directly below the drum 2, and the driving gear 51 is engaged with the driven rack 31.

[0066] Regarding the driven tooth structure 3 and the driving tooth structure 5, in another embodiment, as shown in the attached Figure 11 As shown, the driven gear structure 3 includes two driven racks 31, both arranged on the circumferential outer wall 20 of the drum 2, and symmetrically arranged about the center plane 200. The corresponding driving gear structure 5 includes two driving gears 51, each meshing with the two driven racks 31. This embodiment primarily takes into account that some automatic cat litter boxes may have litter falling directly below the drum. Therefore, the driven racks and driving gears are positioned away from the drum. The resulting imbalance in force on the drum is avoided by providing two symmetrical driving structures.

[0067] By analogy, in other embodiments, the driven tooth structure 3 may further include three, four or even more driven racks 31 , and the driving tooth structure 5 may correspondingly include three, four or even more driving gears 51 .

[0068] Furthermore, to facilitate user use of the automatic litter box, it also includes a guide structure 6. This structure serves to guide the driven gear structure 3 and the driving gear structure 5 into engagement, while also limiting the movement of the drum 2 along its rotational axis 2000. This guide structure allows the user to simply place the drum on the base, where the driven gear structure 6 and the driving gear structure 8 will automatically align and engage, eliminating the need for the user to intentionally align the gear structure. Furthermore, it prevents axial displacement of the drum 2 during the meshing of the driving gear structure 5 and the driven gear structure 3.

[0069] Among them, the guide structure 6 extends along the circumference of the drum 2, and the guide structure 6 includes a first guide portion 61 and a second guide portion 62. The first guide portion 61 is arranged on the circumferential outer wall 20 of the drum 2, and the second guide portion 62 is arranged on the base 1. The first guide portion 61 and the second guide portion 62 are matched and connected to limit the movement of the drum 2 along its rotation axis 2000.

[0070] At least one of the first guide portion 61 and the second guide portion 62 is provided with a guide slope 63 , and the guide slope 63 is used to guide the first guide portion 61 and the second guide portion 62 to be matched and connected so that the driven tooth structure 3 and the driving tooth structure 5 are engaged.

[0071] The first guide portion 61 and the second guide portion 62 can be implemented as a combination of a boss and a groove. For example, one of the first guide portion 61 and the second guide portion 62 can be configured as a guide groove 601, and the other as a guide boss 602. At least one of the guide groove 601 and the guide boss 602 is provided with a guide bevel 63. The guide bevel 63 is used to guide the guide boss 602 into the guide groove 601 and limit the movement of the drum 2 along its rotation axis 2000, thereby guiding the driven tooth structure 3 into engagement with the driving tooth structure 5.

[0072] In order to make the guiding effect of the guide bevel more perfect, in this preferred embodiment, two guide bevels 63 are provided, and the two guide bevels 63 are symmetrically arranged on both sides of the guide groove 601. Of course, in other embodiments, the two guide bevels 63 can also be respectively arranged on both sides of the guide boss 602.

[0073] Regarding the guide structure 6, in one embodiment, as shown in the attached Figure 12 As shown, the first guide portion 61 is a guide groove 601 extending along the circumference of the drum 2, and the second guide portion 62 is a guide boss 602 provided on the base 1, which is inserted into the guide groove 601. In addition, when the drum 2 deviates axially, the guide boss 602 will abut against the inner side wall of the guide groove 601, thereby preventing the drum 2 from further deviating.

[0074] In another embodiment, as shown in the attached Figure 13 As shown, the first guide portion 61 is a guide boss 602 provided on the outer wall 20 of the drum 2, and the second guide portion 62 is a guide groove 601 provided on the base 1. The guide groove 601 extends along the circumference of the drum 2, and the guide boss 602 is inserted into the guide groove 601. In addition, when the drum 2 deviates axially, the guide boss 602 will also abut against the inner wall of the guide groove 601, thereby preventing the drum 2 from further deviating.

[0075] In the above two embodiments, the number of the guide grooves 601 and the number of the guide bosses 602 are the same, so that the cross-sections of the guide grooves and the guide bosses are arranged in a "V" shape or a wedge shape, such as Figure 14 As shown, the two inner inclined surfaces of the guide groove 601 and the two outer inclined surfaces of the guide boss 602 can both be used as the guide inclined surfaces 63.

[0076] In another embodiment, as shown in the attached Figure 15 As shown, a guide wheel 15 is rotatably provided on the base 1, and the guide wheel 15 can abut against the peripheral outer wall 20 of the drum 2. A guide groove 601 is provided on the peripheral outer wall 20 of the drum 2, and a guide boss 602 is formed on the guide wheel 15. That is, the peripheral portion of the guide wheel 15 serves as the guide boss 602, so that the guide wheel 15 extends into the guide groove 601 and abuts against the drum 2.

[0077] In another embodiment, as shown in the attached Figure 16 As shown, a guide groove is provided on the driving tooth structure, so that the gear teeth 500 of the driving tooth structure 5 are placed in the guide groove 601. The guide boss 602 is the gear teeth 300 on the driven tooth structure 3. The gear teeth 300 of the driven tooth structure 3 can be inserted into the guide groove 601 and mesh with the gear teeth 500 of the driving tooth structure 5. This embodiment combines the guide structure 6 with the driving structure, making the surface of the drum 2 more concise.

[0078] In a preferred embodiment, as shown in the attached Figure 2 As shown, the first guide portion 61 is a guide groove 601 provided on the peripheral outer wall 20 of the drum 2. The guide groove 601 extends along the circumference of the drum 2, and the driven tooth structure 3 is disposed in the guide groove 601. The second guide portion 62 is a guide boss 602 provided on the driving tooth structure 5. The guide boss 602 constitutes the gear teeth 500 of the driving tooth structure 5. The gear teeth 500 of the driving tooth structure 5 can extend into the guide groove 601 and mesh with the driven tooth structure 3. This preferred embodiment combines the guide structure 6 with the driving structure, making the surface of the drum 2 more concise.

[0079] Specifically, in this preferred embodiment, in order to reduce the difficulty of opening the mold of the roller 2, the driven tooth structure 3 is provided on the surface of the roller 2 in a protruding manner, and there is no need to perform a groove operation on the surface of the roller 2. On this basis, in order to form the guide groove 601, as shown in the attached figure, Figure 5 and6 As shown, at least two limiting baffles 22 are further provided on the circumferential outer wall 20 of the drum 2. These at least two limiting baffles 22 together form a guide groove 601, and at least one of the limiting baffles 22 is provided with a guiding slope 63. Preferably, the guide groove 601 is formed by two limiting baffles 22 together, and both limiting baffles 22 are provided with a guiding slope 63 on the side away from the drum 2. The driven tooth structure 3 is disposed between the two limiting baffles 22. When the drum 2 deviates axially, the driving tooth structure 5 abuts against one of the limiting baffles 22, thereby preventing the drum 2 from further deviating.

[0080] It should be noted that, in this preferred embodiment, the number of guide grooves 601 corresponds to the number of the driven racks 31 , that is, each driven rack 31 is respectively arranged in a guide groove 601 , and each guide groove 601 is correspondingly composed of two limit baffles 22 .

[0081] Considering the difficulty of making a mold for the drum 2, in this preferred embodiment, at least one of the two limiting baffles 22 is detachably connected to the drum 2. For example, the two limiting baffles 22 are a first baffle 221 and a second baffle 222. The first baffle 221 is connected to the drum 2 via screws, and the second baffle 222 is integrally formed on the drum 2. In other words, the first baffle 221 is separated and molded separately. After the first baffle 221 and the drum 2 are both formed, the first baffle 221 is fixed to the drum 2 via screws.

[0082] Since the cat litter box of the present invention does not have a locking structure for the drum 2, the drum 2 can be removed at will. In order to prevent the user from placing the drum 2 on the base 1 in reverse, the preferred embodiment also provides an inner cavity 13 on the base 1. The inner cavity 13 includes an inner wall 131. The drive tooth structure 5 is arranged in the inner cavity 13. A limiting gap 14 is provided between the drive tooth structure 5 and the inner wall 131. The two limiting baffles 22 are respectively a first baffle 221 and a second baffle 222. The first baffle 221 can extend into the limiting gap 14. The second baffle 222 is provided with an anti-fool flange 223. The anti-fool flange 223 extends in a direction away from the first baffle 221. The extension length of the anti-fool flange 223 is greater than the width of the limiting gap 14, so that the anti-fool boss cannot extend into the limiting gap 14, thereby limiting the placement direction of the drum 2.

[0083] Furthermore, in order to improve the stability of the rotation of the drum 2 and prevent the drum 2 from tipping over, the multiple roller assemblies 121 include at least a first roller assembly 1211 and a second roller assembly 1212. The first roller assembly 1211 contacts the drum 2 to form a first contact point 201, and the second roller assembly 1212 contacts the drum 2 to form a second contact point 202. The heights of the first contact point 201 and the second contact point 202 are the same or approximately the same, and the height difference between the two is within 3 cm.

[0084] As attached Figure 7 and 8 As shown in , in one embodiment, the position of the center of gravity 207 of the drum 2 is different depending on the internal structure of the drum 2. Therefore, the position design of the first roller assembly 1211 and the second roller assembly 1212 only needs to ensure that the center of gravity 207 of the drum 2 is always between the first contact point 201 and the second contact point 202, so as to prevent the drum 2 from tipping over.

[0085] In another embodiment, the lowest point of the circumferential outer wall 20 of the drum 2 forms a lowest point 203, a line connecting the first contact point 201 and the rotation axis 2000 of the drum 2 forms a first line 204, a line connecting the second contact point 202 and the rotation axis 2000 of the drum 2 forms a second line 205, and a line connecting the lowest point 203 of the drum 2 and the rotation axis 2000 of the drum 2 forms a reference line 206. The angle between the first line 204 and the reference line 206 is between 40° and 60°, and the angle between the second line 205 and the reference line 206 is also between 40° and 60°. Preferably, both angles are 50°. The range of the two angles can be used to design the center of gravity 207 of most drums 2, similarly to maintain the range of variation of the center of gravity 207 of the drum 2 between the first contact point 201 and the second contact point 202.

[0086] In addition, to ensure that the supporting mechanism 12 supports the roller more stably, the plurality of roller assemblies 121 further include at least two auxiliary roller assemblies 1213, which are distributed between the first roller assembly 1211 and the second roller assembly 1212. Preferably, two auxiliary roller assemblies 1213 are provided.

[0087] Furthermore, each roller assembly 121 includes two roller structures 1210 symmetrically arranged according to the center plane 200, or may include four, six or even more roller structures 1210. All roller structures 1210 included in each roller assembly 121 are at the same height position.

[0088] Furthermore, regarding the specific configuration of the roller structure 1210, in one embodiment, as shown in the attached Figure 10As shown, the roller structure 1210 includes a connecting base 12101 and an abutting wheel 12102. The connecting base 12101 is fixedly mounted on the bottom shell 11 via screws. The abutting wheel 12102 is rotatably mounted on the connecting base 12101 and is configured to abut against the circumferential outer wall 20 of the drum 2. Therefore, the abutting wheel 12102 can be connected to the outer surface of the bottom shell 11 via the connecting base 12101, reducing the difficulty of its installation and manufacturing. Furthermore, the abutting wheel 12102 can also serve as the guide wheel 15 in the aforementioned other embodiment.

[0089] Further, in order to make the automatic cat litter box more beautiful as a whole, as shown in the attached Figure 4 and 9 As shown, a rotation groove 111 is further provided on the bottom shell 11, and a plurality of roller assemblies 121 are installed in the rotation groove 111, so that the bottom of the drum 2 can extend into the rotation groove 111 and abut against the roller assemblies 121, that is, the lower side of the drum 2 is sunken into the bottom shell 11. In addition, the inner wall shape of the rotation groove 111 matches the outer wall shape of the circumference of the drum, and the rotation groove is slightly larger than the drum.

[0090] It should be noted that in order to prevent the driving mechanism from being caught in human tissues such as hair and fingers and causing injury to the user, in a preferred embodiment, the base 1 has a front wall 17 and a rear wall 18, and the side where the cat enters the drum is the front wall 17, so that the driving gear 51 is set in the middle of the base 1, and an escape groove 16 is provided on the base 1 corresponding to each driven rack 31. The escape groove 16 is connected to the front wall 17 and the rear wall 18, and the driven rack 31 extends into the escape groove 16, and the escape groove 16 is connected to the rotating groove 111. There is an escape gap 19 between the bottom wall 161 of the escape groove 16 and the driven rack 31. The escape gap 19 is wide and deep, and can be inserted by fingers, so the user's fingers can be easily pulled out. The escape gap 19 is shown in the attached figure. Figure 2 As shown in FIG, the maximum depth of the avoidance gap 19 is 1.2 times or more of the tooth height of the driven rack 31.

[0091] In order to reduce the gap between the drum 2 and the bottom shell 11 and prevent the cat from getting into the gap, in one embodiment, as shown in the attached Figure 9 and 10 As shown, the bottom shell 11 is further provided with a mounting groove 112 that communicates with the rotation groove 111. The connecting seat 12101 is fixed in the mounting groove 112, so that the roller structure 1210 is integrally mounted on the bottom shell 11 in an embedded manner. A plurality of position-limiting reinforcement ribs 113 are also provided in the mounting groove 112 along the circumference of the connecting seat 12101. The position-limiting reinforcement ribs 113 are used to abut against the connecting seat 12101 and are primarily used to facilitate rapid positioning of the connecting seat 12101 during installation.

[0092] Furthermore, a working chamber 208 is provided in the drum 2, and a flat or substantially flat entry surface 209 is provided on one side of the drum. An inlet 2091 communicating with the working chamber 208 is provided on the entry surface 209. The drum 2 can be rotated so that the entry surface 209 faces upward. Figure 17 As shown, the entry surface 209 faces upward, so the overall height of the automatic cat litter box can be greatly reduced, making it easier to pack and transport, saving shipping costs.

[0093] Obviously, the embodiments described above are only some of the embodiments of the present invention, rather than all of the embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of protection of the present invention patent.

Claims

1. An automatic cat litter box, characterized in that: include: base; A roller, wherein the roller has a center plane perpendicular to its rotation axis, and the roller is symmetrical or approximately symmetrically arranged about the center plane; A driven tooth structure, the driven tooth structure being arranged on the outer wall of the circumferential side of the drum and extending along the circumference of the drum, and the driven tooth structure being symmetrically arranged with respect to the central plane; A driving tooth structure, the driving tooth structure being mounted on the base, the driving tooth structure being symmetrically arranged with respect to the center plane, and the driving tooth structure correspondingly meshing with the driven tooth structure; A driving device, the driving device being mounted on the base and configured to drive the driving gear structure to move; a guide structure comprising a first guide portion and a second guide portion, wherein the first guide portion is disposed on the outer peripheral wall of the drum, and the second guide portion is disposed on the base, and the first guide portion and the second guide portion are cooperatively connected to limit movement of the drum along its rotation axis; Wherein, when the roller is placed on the base, the driven tooth structure is engaged with the driving tooth structure, and the driving device can drive the driving tooth structure, thereby driving the roller to rotate around the rotation axis.

2. An automatic cat litter box according to claim 1, characterized in that: At least one of the first guide portion and the second guide portion is provided with a guide slope, and the guide slope is used to guide the first guide portion and the second guide portion to be connected in a cooperative manner so that the driven tooth structure and the driving tooth structure are engaged.

3. The automatic cat litter box according to claim 1, characterized in that: There are two guiding inclined surfaces, which are respectively arranged on both sides of the first guiding portion, or two guiding inclined surfaces are respectively arranged on both sides of the second guiding portion.

4. The automatic cat litter box according to claim 1, characterized in that: One of the first guide portion and the second guide portion is configured as a guide groove, and the other is configured as a guide boss, and the guide boss can extend into the guide groove.

5. The automatic cat litter box according to claim 4, characterized in that: A guide wheel is rotatably provided on the base, and the guide wheel can abut against the outer wall of the circumference of the drum; The guide groove is provided on the peripheral outer wall of the drum, and the guide boss is formed on the guide wheel, so that the guide wheel extends into the guide groove and abuts against the drum.

6. The automatic cat litter box according to claim 4, characterized in that: The guide groove is arranged on the base, and the cross section of the guide groove is wedge-shaped. The guide boss is arranged on the peripheral outer wall of the roller, and the cross section of the guide boss is wedge-shaped.

7. The automatic cat litter box according to claim 4, characterized in that: The guide groove is arranged on the outer wall of the circumferential side of the roller, the driven tooth structure is arranged in the guide groove, the guide boss is the gear tooth of the driving gear structure, and the gear tooth of the driving gear structure can be inserted into the guide groove and meshed with the driven tooth structure.

8. The automatic cat litter box according to claim 7, characterized in that: The driven tooth structure is protrudingly provided on the peripheral outer wall of the drum, and at least two limit baffles are provided on the peripheral outer wall of the drum, and at least two limit baffles are surrounded to form the guide groove; At least one of the at least two limiting baffles is detachably connected to the roller.

9. The automatic cat litter box according to claim 8, characterized in that: The base is provided with an inner cavity, the inner cavity includes an inner wall, the driving tooth structure is arranged in the inner cavity, and a limiting gap is formed between the driving tooth structure and the inner wall; At least two of the limiting baffles include a first baffle and a second baffle, the first baffle can extend into the limiting gap, and the second baffle is provided with an anti-fool flange, which extends in a direction away from the first baffle, and the extension length of the anti-fool flange is greater than the width of the limiting gap.

10. The automatic cat litter box according to claim 1, characterized in that: The driven tooth structure includes at least one driven rack, all of which are arranged on the outer wall of the circumference of the drum, and all of which form a symmetrical structure symmetrical about the central plane; the driving tooth structure includes driving gears, the number of which corresponds to the number of the driven racks, and the driving gears mesh with the driven racks; The base has a front wall and a rear wall. An avoidance groove is provided on the base corresponding to the driven rack. The avoidance groove is connected to the front wall and the rear wall. The driven rack extends into the avoidance groove. There is an avoidance gap between the bottom wall of the avoidance groove and the driven rack.

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