CN111631146A - Shovel and automatic sand changing device using same - Google Patents

Abstract

The invention discloses a shovel and an automatic sand changing device applying the shovel, wherein the shovel comprises a shovel arm, a base connected with the shovel arm and a shovel comb connected with the base; the litter changing device comprises a shovel, a frame body, a cat litter basin body, a filling mechanism and a collector; the shovel comb can rotate relative to the base, so that the shovel can avoid the self-locking condition when contacting the bottom surface of the cat litter basin body, and the effectiveness of the shovel comb for shoveling feces can be ensured when the shovel directly contacts the inner wall of the cat litter basin body; the shovel comb is detachable relative to the base, so that the shovel comb is easy to operate when damaged or needs to be replaced; the shovel is arranged on the power shaft, and the power shaft is also provided with a cam which is contacted with the filling cover of the sand storage box; when the power shaft rotates anticlockwise, the rotation of the cam can drive the filling cover to rotate and open, so that sand filling is realized; when the power shaft rotates clockwise, the shovel rotates synchronously along with the power shaft and conveys polluted cat litter and excrement to the collector, and the scraper is ingenious in integral structure and convenient to use.

Description

Shovel and automatic sand changing device using same

Technical Field

The invention relates to the technical field of auxiliary equipment for pet feeding, in particular to a shovel and an automatic sand changing device using the shovel.

Background

With the rapid development of economy, young groups have greater and greater demand for pets; the pet cat is a kind of favorite breeding of young groups; however, the excretion problem of the pet cats always troubles the feeding population of the pet cats, so that the market utilizes the natural appearance of the pet cats such as cat litter trays, and the pet cats can cover and bury the excrement by using the cat litter after excretion; the cat litter basin appearing in the market has certain guide effect to the excretion of cat, but the cat litter after the excretion needs to be handled as soon as possible, avoids the cat to produce the guide inefficacy that contradicts and lead to the cat litter basin because the love is clean to the cat litter basin, so have prior art and realize the automatic excrement scraper of cat litter basin.

However, in the prior art, the shovel for the automatic dung shoveling mechanism cannot completely clean up excrement attached in the cat litter basin due to the fact that the shovel cannot contact the inner wall of the cat litter basin due to the defect of the structure of the shovel, and therefore the guiding effect of the cat litter basin is weakened or even fails.

Disclosure of Invention

The invention mainly solves the technical problems that: the shovel is provided, and the technical problems that the shovel is locked in the rotating excrement shoveling process and cannot contact with a cat litter basin body due to the fact that the shovel cannot rotate are solved; the utility model provides an use automation of this shovel to trade sand device, realize trading the automation of cat litter basin the sand and to the more clean of cat litter basin inner wall adnexed excrement clearance.

In order to solve the main technical problems, the following technical scheme is adopted:

a shovel comprises a shovel arm, a base connected with the shovel arm and a shovel comb connected with the base; the shovel comb comprises shovel teeth, a first fixing block and a locking piece; a plurality of the relieving teeth are linearly arranged and fixed on the bottom surface of the first fixed block; the two ends of the first fixed block are provided with second fixed blocks, and the length direction of the second fixed blocks is consistent with the arrangement direction of the relieving teeth; a through groove transversely penetrating through the second fixing block in the length direction is formed in the top of the second fixing block; two inner walls opposite to the through groove are provided with slide rails; the two opposite sides of the locking sheet are correspondingly provided with sliding grooves which are connected with the sliding rail in a sliding manner; the bottom surface of the locking sheet directly contacts the inner bottom surface of the through groove; the end part of the inner bottom surface of the through groove is provided with a mounting groove; the distance between the two slide rails positioned on the two opposite sides is larger than the size of the mounting groove in the direction; the two ends of the bottom edge of the base are provided with base rotating shafts capable of rotating; the peripheral surface of the base rotating shaft is rotatably connected with a fixed sleeve; the fixing sleeve is placed in the mounting groove; the locking piece can slide to the upper part of the mounting groove and press the fixing sleeve in the mounting groove.

Preferably, a shovel sleeve is arranged on at least one shovel tooth.

Preferably, the plurality of the relieving teeth are divided into two groups, and the axial length of one group of relieving teeth is larger than that of the other group of relieving teeth.

Preferably, the shovel arm comprises a first connecting shaft arranged on the shovel comb and a second connecting shaft hinged on the first connecting shaft; the second connecting shaft is fixedly connected with the base.

The automatic sand changing device corresponding to the shovel comprises the shovel, a frame body, a cat litter basin body, a filling mechanism and a collector with an open top surface; the cat litter box body is arranged in the frame; the filling mechanism is arranged above the cat litter box body; the collector is adjacent to the litter box body; wherein: the filling mechanism comprises a sand storage box arranged on the frame body; a filling opening is formed in the bottom surface of the sand storage box, and a filling cover is hinged to the filling opening; the sand storage box is provided with a power shaft which is driven to rotate by a driving element; the power shaft is provided with a cam which is in contact with the filling cover, and the cam rotates under the transmission of the driving element to drive the filling cover to rotate and open by taking the hinged part as an axis; a torsional spring which enables the filling cover to return to close the filling opening is further arranged at the hinged position of the filling cover; the shovel is installed on the power shaft and can be rotated under the transmission of driving element and shovels cat litter or excrement in the cat litter basin body and sends the cat litter or excrement into the collector.

Preferably, the cat litter box body is an arc-shaped groove structure; the inner wall of the cat litter box body is provided with at least one protruding rib; the protruding ribs are of arc-shaped structures which are gradually thinned from the bottommost part of the cat litter basin body to the edges of the two sides until the protruding ribs are flush with the side wall of the cat litter basin body.

Preferably, the top of the collector is provided with a corridor mechanism; the corridor mechanism comprises a door arranged on a side plate of the frame body and a corridor hinged on the side plate; the corridor covers the top surface of the collector and is provided with sand leakage holes; a guide plate which inclines towards the cat litter basin body is arranged below the corridor; the both sides of guide plate are equipped with the push rod that extends to cat litter basin body top, the base gets into the push rod below and lifts guide plate and vestibule simultaneously and makes the collector top surface expose when following the shovel arm rotation.

Preferably, a screen plate is also vertically arranged on the corridor; the screen plate is positioned at the front side of the door entering direction.

Preferably, a control system is also included; the control system comprises a gravity sensing device arranged on the cat litter box body and an infrared sensing device arranged on the door; and the control system receives signals of the gravity sensing device and the infrared sensing device and drives the power shaft to rotate anticlockwise or rotate clockwise for a specified angle.

Preferably, the drive element is a motor; the driving shaft is provided with a first gear which is meshed with a gear on the motor.

Preferably, a deodorizing device is also included; the deodorization device comprises a negative ion generator and a deodorization and sterilization module; the deodorization and sterilization module is fixed at the bottom of the sand storage box; the negative ion generator is arranged on the side surface of the collector.

Compared with the prior art, the cat litter box has the following advantages when being applied to the scooping of cat litter and the automatic replacement of cat litter:

(1) the shovel comprises a shovel comb, a shovel arm and a base; the shovel comb can rotate relative to the base and can be detached, and the shovel comb can rotate to enable a shovel to be prevented from self-locking when the shovel contacts with the bottom surface of the cat litter basin body, so that the shovel can directly contact with the inner wall of the cat litter basin body to guarantee the effectiveness of shoveling, combing and shoveling feces; the shovel comb is detachable, so that the shovel comb can be operated easily when damaged or required to be replaced.

(2) The shovel includes the forming relieved tooth, and the bottom cover of at least one forming relieved tooth has shovel cover or a plurality of forming relieved tooth to divide into two sets ofly, and the axial length of a set of forming relieved tooth is greater than the axial length of another set of forming relieved tooth to make the friction between forming relieved tooth and the cat litter basin body diminish.

(3) The sand changing device comprises a filling mechanism and a shovel, the shovel is arranged on a power shaft, and the power shaft is also provided with a cam which is in contact with a filling cover of the sand storage box; when the power shaft rotates anticlockwise, the rotation of the cam can drive the filling cover to rotate and open by taking the hinged position as a center, so that sand filling is realized; when the power shaft rotates clockwise, the shovel rotates synchronously along with the power shaft to realize that the shovel comb moves along the arc-shaped inner wall of the cat litter box body, and excrement attached to the inner wall of the cat litter box body is cleaned; utilize the different direction of rotation of same power shaft to realize automatic sand changing, the structure is ingenious, and it is convenient to use.

(4) Trade the sand device and still be provided with corridor mechanism, corridor mechanism can cover the top surface of collector, can make the cat through cat litter basin body back on one's body adnexed cat litter flow back to cat litter basin body simultaneously to avoid the external environment of cat litter pollution frame.

(5) The sand-changing device also comprises a deodorizing device, so that air in the frame can be freshened; the overall structure of the sand changing device enables the cat to be discharged conveniently, brings great convenience to a feeder who feeds the pet, is very suitable for the cat raising requirement of the young, and is worthy of being popularized vigorously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some examples of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic structural view of an automatic sand changer according to an embodiment of the present invention in a static state;

fig. 2 is a schematic structural diagram of an automatic sand changing device in a dung scraping state according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a static state of a filling mechanism of an automatic sand changer according to an embodiment of the present invention;

fig. 4 is a structural schematic view of a sand adding state of a filling mechanism of the automatic sand changer according to the embodiment of the present invention;

fig. 5 is a schematic view of an overall structure of a corridor mechanism of an automatic sand changer according to an embodiment of the present invention:

fig. 6 is a schematic top view of an automatic sand changer corridor according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a litter box body according to an embodiment of the present invention.

Fig. 8 is a schematic front view of a shovel according to an embodiment of the present invention:

fig. 9 is a schematic side view of a shovel according to an embodiment of the present invention:

fig. 10 is a schematic front view of another structure of the shovel according to the embodiment of the present invention:

FIG. 11 is a schematic view of the connection between the shovel comb and the rotating shaft of the base according to the embodiment of the present invention:

fig. 12 is a schematic structural diagram of a shovel comb in a top view, according to an embodiment of the present invention:

fig. 13 is a schematic structural diagram of a locking plate according to an embodiment of the present invention:

fig. 14 is a schematic structural diagram of a base according to an embodiment of the present invention.

In the figure: 1 is a shovel;

2 is a shovel arm, 21 is a first connecting shaft, and 22 is a second connecting shaft;

3 is a base, 31 is a base rotating shaft, and 32 is a fixing sleeve;

4, a shovel comb;

the reference numeral 41 is a relieving tooth, and the reference numeral 42 is a first fixed block;

43 is a locking piece, 431 is a sliding groove;

44 is a second fixed block, 441 is a through groove, 442 is a slide rail, 443 is a mounting groove;

45 is a shovel cover;

5 is a cat litter basin body, 51 is a convex rib;

6 is an infrared induction device;

7 is a frame body;

8 is a filling mechanism, 81 is a sand storage box, 82 is a filling opening, 83 is a filling cover, 84 is a power shaft, and 85 is a cam;

9 is a collector;

10 is a corridor mechanism, 101 is a door, 102 is a corridor, 1021 is a sand leakage hole, 103 is a guide plate, 1031 is a push rod, and 104 is a screen plate;

11 is a gravity sensing device;

12 is a deodorizing device, 121 is an anion generator, and 122 is a deodorizing and sterilizing module.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions.

Referring to fig. 8-14, a shovel 1 includes a shovel arm 2, a base 3 connected to the shovel arm 2, and a shovel comb 4 connected to the base 3; in the actual use process, the shovel arm 2 is usually fixed on a rotatable shaft, and under the rotation action of the rotatable shaft, the shovel arm 2 can rotate around the shaft and scoop up excrement or cat litter of the cat litter box body 5 to a specified position; the shovel 1 and the base 3 can be fixed into a whole by welding or fasteners, and can also be integrally formed into a whole.

The shovel comb 4 comprises a shovel tooth 41, a first fixing block 42 and a locking sheet 43; the relieved tooth 41 is a cylinder, and can be a trapezoidal table or a cone with a certain taper; a plurality of relieving teeth 41 are linearly arranged to form a tight comb shape and are all installed and fixed on the bottom surface of the first fixing block 42, and the appearance of the structure formed by the relieving teeth 41 and the first fixing block 42 is similar to that of a comb used in daily life; the side of the first fixed block 42 is fixed with a second fixed block 44 through integral molding or fasteners, and the second fixed block 44 has two ends respectively located at the two ends of the first fixed block 42 in the length direction; the first fixing block 42 and the second fixing block 44 are both of a cuboid structure, and the length direction of the first fixing block 42 and the length direction of the second fixing block 44 are both consistent with the distribution arrangement direction of the relieving teeth 41; in order to enhance the strength between the two second fixing blocks 44, a reinforcing rib is arranged between the two second fixing blocks 44, and the length sum of the reinforcing rib and the two second fixing blocks 44 is consistent with the length size of the first fixing block 42; a through groove 441 is arranged at the top of the second fixed block 44, and the length direction of the through groove 441 penetrates through the length direction of the second fixed block 44; two opposite inner walls of the through groove 441 are provided with slide rails 442, and the extending length direction of the slide rails 442 is consistent with the length direction of the through groove 441; the opposite two sides of the locking piece 43 are both provided with sliding grooves 431, the longitudinal section of the locking piece 43 is in an I shape, the sliding rail 442 is clamped in the sliding grooves 431, so that the up-and-down movement of the locking piece 43 is limited, and the locking piece 43 can move back and forth along the sliding rail 442; the bottom surface of the locking piece 43 directly contacts the inner bottom surface of the through groove 441 and has a certain extrusion effect on the inner bottom surface, and the locking piece 43 cannot move up and down and can only slide along the sliding rail 442 under the clamping limitation of the sliding groove 431 and the sliding rail 442, so that the bottom surface of the locking piece 43 always contacts the inner bottom surface of the through groove 441; the bottom surface of the through groove 441 is provided with a mounting groove 443 at a position close to the end, and the distance between the two slide rails 442 is greater than or equal to the size of the mounting groove 443 in this direction.

The two ends of the bottom edge of the base 3 are both provided with the base rotating shaft 31, the base rotating shaft 31 can only rotate relative to the base 3, the outer surface of the base rotating shaft 31 is rotatably sleeved with the fixing sleeve 32, namely, the outer surface of the base rotating shaft 31 is sleeved with the fixing sleeve 32 through a bearing, the fixing sleeve 32 can be completely placed in the mounting groove 443 in the radial direction, namely, the fixing sleeve 32 enters the through groove 441 from the right upper part of the second fixing block 44 and is placed in the mounting groove 443, and then the locking sheet 43 slides to the upper surface of the fixing sleeve 32 to press the fixing sleeve 32 in the mounting groove 443, so that the fixing sleeve 32 is locked; the base 3 and the shovel comb 4 can be detached through the arrangement of the locking piece 43, the second fixing block 44 and the mounting groove 443, so that the shovel comb 4 can be conveniently replaced at any time, and the base rotating shafts 31 at the two ends of the base 3 are respectively clamped from the outer side of the shovel comb 4; the shovel comb 4 is closely distributed in a comb tooth shape with a plurality of shovel teeth 41, so that resistance can be reduced, and uncontaminated cat litter can be filtered one by one, so that the shovel comb 4 can mainly shovel excrement of cats to a designated position, and waste of clean cat litter is avoided; the design of the base rotating shaft 31 enables the shovel comb 4 to rotate relative to the shovel arm 2, so that when the shovel 1 moves along with the shovel arm 2 in an arc manner, the shovel 1 can rotate by a certain angle, the phenomenon that the shovel 1 and the cat litter bowl body 5 are self-locked to influence the use of the shovel 1 is avoided, the included angle between the bottom of the shovel comb 4 and the tangent line of the lowest point of the inner wall of the cat litter bowl body 5 is smaller than 57 degrees, and the optimal included angle is equal to 45 degrees; the rotation of shovel 4 between 2 relative shovel arms does not have the emergence of locking phenomenon for shovel comb 4 can 5 inner walls of direct contact cat litter basin body, thereby with the excrement clearance of 5 inner walls of cat litter basin body cleaner.

In order to adapt to the rotary excrement shoveling of the shovel arm 2 with the shovel comb 4 in a small space, the shovel arm 2 comprises a first connecting shaft 21 fixedly arranged on the shovel comb 4 and a second connecting shaft 22 hinged to the first connecting shaft 21; the second connecting shaft 22 is fixedly connected with the base 3 through welding or fasteners.

In order to avoid the friction between the shovel comb 4 and the cat litter box body 5, the structure of the shovel teeth 41 has the following two structures, and the first structure is: the shovel sleeves 45 are sleeved on the shovel teeth 41, the shovel sleeves 45 are of a cylindrical structure, the bottoms of the shovel sleeves 45 are in contact with the inner wall of the cat litter box body 5, the shovel teeth 41 provided with the shovel sleeves 45 are distributed at intervals with the shovel teeth 41 not provided with the shovel sleeves 45, and one or more shovel teeth 41 which are provided with the shovel sleeves 45 and are not provided with the shovel sleeves 45 are arranged between every two adjacent shovel teeth 41 provided with the shovel sleeves 45 at intervals; only the shovel teeth 41 provided with the shovel sleeves 45 can contact the inner wall of the cat litter box body 5, so that the friction force between the shovel combs 4 and the inner wall of the cat litter box body 5 is reduced; the second structure of the tooth 41 is: the plurality of relieving teeth 41 are divided into two groups, the axial length of one group of relieving teeth 41 is greater than that of the other group of relieving teeth 41, the relieving teeth 41 with different lengths are distributed in a crossed manner, the relieving teeth 41 in different groups can be in one-to-one correspondence or one-to-many correspondence, and the specific setting condition is determined according to actual needs.

Please refer to fig. 1-7: an automatic sand changing device comprises a shovel 1, a frame body 7, a cat litter basin body 5, a filling mechanism 8 and a collector 9 with an open top surface; the frame body 7 is a closed structure and has certain strength; bottom surface in framework 7 is installed through support piece to cat litter basin body 5, in order to detect the weight of cat litter in cat litter basin body 5 and whether have the cat to get into cat litter basin body 5, be provided with gravity sensing device 11 between cat litter basin body 5 and the framework 7, gravity sensing device 11 includes weighing machine structure and transmission signal mechanism, transmission signal mechanism can call the signal transmission of the quality that weighing machine constructs for control system, control system can be to the motion send instruction of filling mechanism 8 and shovel 1, gravity sensing device 11's concrete structure is set for according to prior art.

The filling mechanism 8 is positioned above the cat litter box body 5, the filling mechanism 8 comprises a sand storage box 81, the sand storage box 81 is similar to a funnel in shape, the bottom of the sand storage box 81 is smallest in size, the sand storage box 81 is fixed on the top surface of the frame body 7, a filling port 82 is formed in the bottom surface of the sand storage box 81, and a box cover capable of being opened and closed is arranged on the top surface of the sand storage box 81, so that sand can be conveniently filled into the sand storage box 81; the bottom of the filling opening 82 is hinged with a filling cover 83, the middle of the filling cover 83 is fixed on the sand storage box 81 through a rotating shaft, and the filling cover 83 covers the surface of the filling opening 82 and extends obliquely towards the upper part of the sand storage box 81; a driving element and a power shaft 84 are further arranged on the side wall of the sand storage box 81, the driving element is a motor, the power shaft 84 is meshed with a gear of the motor through a first gear, so that the power shaft 84 is driven to rotate, the power shaft 84 is positioned below the part, extending out of the filling opening 82, of the filling cover 83, and a cam 85 positioned below the filling cover 83 is arranged on the power shaft 84; when the cam 85 rotates within 90 degrees of the counterclockwise rotation of the power shaft 84, namely, when the cam 85 is in a convex part, the cam can abut against the filling cover 83 to extend out of the filling opening 82, so that the part moves upwards around the rotating shaft, namely, the filling cover 83 covers the part of the filling opening 82 to move downwards, so that a gap is formed between the filling opening 82 and the filling cover 83, and clean cat litter is filled into the cat litter box body 5 from the sand storage box 81 through the filling opening 82 to complete the sanding; a torsion spring is further arranged between the rotating shaft and the filling cover 83, the torsion spring is sleeved on the rotating shaft, the end part of the torsion spring is fixed with the filling cover 83, and under the action of the torsion spring, once the convex part of the cam 85 is not in contact with the filling cover 83, no gap exists between the filling cover 83 and the filling opening 82.

The collector 9 is movably fixed on the bottom surface of the frame body 7 and is adjacent to the cat litter box body 5, namely the collector 9 can be relatively taken out of the frame body 7 or drawn out of the frame body 7 similar to a drawer structure, so that a pet raiser can clean the collector 9 conveniently; the first connecting shaft 21 of the shovel 1 is fixed on the power shaft 84 and rotates together with the power shaft 84 under the action of a driving element, when the power shaft 84 rotates clockwise within 0-270 degrees, the first connecting shaft 21 and the second connecting shaft 22 become straight lines along with the rotation, so that the rotating diameter of the shovel comb 4 is increased, after the shovel comb 4 contacts the cat litter box body 5, the shovel comb 4 rotates around the base 3 and contacts the inner wall of the cat litter box body 5, and polluted cat litter or excrement is shoveled and conveyed into the collector 9; in an initial position state, the power shaft 84 rotates clockwise by 0-270 degrees and only can complete the dung shoveling operation of the shovel 1, and the power shaft 84 rotates counterclockwise by 0-90 degrees and only can complete the cat litter adding action of the filling mechanism 8.

The cat litter box body 5 is of an arc-shaped groove structure, in order to further reduce friction, at least one protruding rib 51 can be arranged on the inner wall of the cat litter box body 5, the protruding rib 51 extends from the bottommost part of the cat litter box body 5 to two side edges, the thickness of the protruding rib 51 at the bottommost part of the cat litter box body 5 is the thickest and gradually becomes thinner in the extending process, and when the protruding rib 51 reaches the side wall of the cat litter box body 5, the protruding rib is flush with the side wall of the cat litter box body 5; two different structures of the forming relieved tooth 41 can be respectively used with the protruding rib 51 of the cat litter basin body 5 in a matched manner.

Because the collector 9 is located inside framework 7, it is not obvious to probably lead to whether collector 9 is full of to in order to facilitate the observation and reminding, the position that is close to the top in the collector 9 also can set for infrared detection according to prior art, detects out the distance of collector 9 top to cat litter top surface, thereby when excrement and pollution cat litter reachd certain height, feeds back the signal to control system, and control system sends the warning, thereby reminds pet breeder in time to handle.

The corridor mechanism 10 is located on top of the collector 9; the corridor mechanism 10 comprises a door 101 arranged on a side plate of the frame body 7 and a corridor 102 hinged on the side plate; the corridor 102 is communicated with the door 101 and the litter box body 5, a plurality of sand leakage holes 1021 are formed in the corridor 102, a vertical screen plate 104 is arranged at a position, opposite to the door 101, of the corridor 102, the screen plate 104 is blocked between the door 101 and the litter box body 5 to be separated, but it is worth noting that the screen plate 104 cannot completely separate the litter box body 5 from the door 101, and the screen plate 104 and the corridor 102 are also provided with opening channels staggered with the door 101 to facilitate a cat to pass through; a guide plate 103 is fixed at the bottom of the corridor 102, the guide plate 103 inclines towards the cat litter box body 5, and the edge of the guide plate 103 and the edge of the cat litter box body 5 are overlapped after moving up and down; the flow guide plate 103 and the corridor 102 are hinged to a side plate where the door 101 is located, push rods 1031 are further integrally formed on two sides of the flow guide plate 103, the extension length of the push rods 1031 is located above the cat litter basin body 5, when the scoop 1 scoops feces to the collector 9, the base 3 rotates along with the scoop arm 2 and enters the lower portion of the push rods 1031, along with the continuous rotation of the scoop arm 2, the base 3 enables the flow guide plate 103 to be communicated with the corridor 102 to be lifted up together to expose the top of the collector 9, and polluted cat litter and excrement are conveyed into the collector 9 together; the vestibule 102 can allow the cat to pass through, and the sand leakage hole 1021 can allow the cat to drain cat litter attached to feet or bodies to the flow guide plate 103 after the cat excretes, and the cat litter is sent back to the cat litter basin body 5 under the oblique line inclination of the flow guide plate 103, so that the waste of cat litter and the influence of the outer part of the frame body 7 on the outer environment of the frame body 7 due to the scattered cat litter are avoided; the structure of the baffle plate 103 covers the top of the collector 9 to prevent the odor of the excrement in the collector 9 from flowing out of the frame 7.

In order to further optimize the control effect of the control system, an infrared sensing device 6 is further arranged on a door 101 of the corridor mechanism 10, the infrared sensing device 6 can detect whether an object passes through or not, and is matched with a signal of a gravity sensing device 11 in an auxiliary mode, namely, whether a cat stays in the cat litter box body 5 or not is detected according to the gravity sensing device 11, the cat is detected to pass through the infrared sensing device 6 on the door 101 after staying, at the moment, the control system starts a driving element, the power shaft 84 rotates clockwise for a certain angle to carry out feces shoveling, then returns, and cat litter is injected at the initial position by rotating counterclockwise for a certain angle, so that litter replacement is completed.

A deodorization device 12 is arranged in the frame body 7 so as to purify the air in the whole frame body 7; the deodorizing device 12 comprises a negative ion generator 121 and a deodorizing and sterilizing module 122; the deodorization and sterilization module 122 is fixed at the bottom of the sand storage box 81; the negative ion generator 121 is arranged on the side surface of the collector 9; the anion generator 121 and the deodorization and sterilization module 122 are arranged according to the prior art, and the deodorization device 12 is synchronously started with the power shaft 84 under the control of the control system, so that the odor is synchronously removed in the sand changing process.

The working process of the invention is as follows: the pet cat enters the litter box body 5 through the corridor 102 for excretion, and after the cat enters the litter box body 5, the gravity sensing device 11 detects the increase of the mass of the litter box body 5 and transmits a signal to the control system; after excretion, the cat leaves the frame body 7 from the door 101 through the corridor 102, in the process, the gravity sensing device 11 detects the change of the mass of the cat litter box body 5 and transmits a signal to the control system, and the infrared sensing device 6 on the door 101 detects the passing of the cat and transmits the signal to the control system; at the moment, the control system receives a signal and starts a driving element, the driving element drives the power shaft 84 to rotate clockwise, in the clockwise rotation process of the power shaft 84, the shovel 1 contacts the inner wall of the cat litter basin body 5 and shovels up the polluted cat litter and excrement, the base 3 moves to the lower part of the guide plate 103 along with the continuous movement of the power shaft 84, the guide plate 103 and the corridor 102 are lifted together by the base 3, and the polluted cat litter and excrement are conveyed into the collection box; then the control system sends out an instruction, the driving element drives the power shaft 84 to rotate anticlockwise to return, in the return process, the guide plate 103 is covered on the top of the collector 9 again, and the shovel 1 also contracts to return; when the shovel 1 completely returns, the power shaft 84 rotates anticlockwise, at the moment, the convex part of the cam 85 jacks up the filling cover 83, the filling cover 83 rotates and opens around the hinged part under the rotation action of the cam 85, clean cat litter in the litter storage box 81 fills cat litter into the cat litter basin body 5 under the action of gravity, and after filling is completed, the power shaft 84 rotates clockwise to return, and automatic litter replacement is completed.

It should be noted that the terms "upper, lower, left, right, inner and outer" in the present invention are defined based on the relative positions of the components in the drawings, and are only used for clarity and convenience of the technical solution, and it should be understood that the application of the terms of orientation does not limit the scope of the present application.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (10)

1. A shovel, its characterized in that: comprises a shovel arm, a base connected with the shovel arm and a shovel comb connected on the base;

the shovel comb comprises shovel teeth, a first fixing block and a locking piece; a plurality of the relieving teeth are linearly arranged and fixed on the bottom surface of the first fixed block; the two ends of the first fixed block are provided with second fixed blocks, and the length direction of the second fixed blocks is consistent with the arrangement direction of the relieving teeth; a through groove transversely penetrating through the second fixing block in the length direction is formed in the top of the second fixing block; two inner walls opposite to the through groove are provided with slide rails; the two opposite sides of the locking sheet are correspondingly provided with sliding grooves which are connected with the sliding rail in a sliding manner; the bottom surface of the locking sheet directly contacts the inner bottom surface of the through groove; the end part of the inner bottom surface of the through groove is provided with a mounting groove; the distance between the two slide rails positioned on the two opposite sides is larger than the size of the mounting groove in the direction;

the two ends of the bottom edge of the base are provided with base rotating shafts capable of rotating; the peripheral surface of the base rotating shaft is rotatably connected with a fixed sleeve; the fixing sleeve is placed in the mounting groove; the locking piece can slide to the upper part of the mounting groove and press the fixing sleeve in the mounting groove.

2. A shovel according to claim 1 wherein: and a shovel sleeve is arranged on at least one shovel tooth.

3. A shovel according to claim 1 wherein: the plurality of the relieving teeth are divided into two groups, and the axial length of one group of relieving teeth is greater than that of the other group of relieving teeth.

4. A shovel according to claim 1 wherein: the shovel arm comprises a first connecting shaft arranged on the shovel comb and a second connecting shaft hinged to the first connecting shaft; the second connecting shaft is fixedly connected with the base.

5. An automatic sand-changing device using the shovel of any one of claims 1 to 4, characterized in that: the cat litter box comprises a shovel, a frame body, a cat litter box body, a filling mechanism and a collector with an open top surface; the cat litter box body is arranged in the frame; the filling mechanism is arranged above the cat litter box body; the collector is adjacent to the litter box body;

wherein: the filling mechanism comprises a sand storage box arranged on the frame body; a filling opening is formed in the bottom surface of the sand storage box, and a filling cover is hinged to the filling opening; the sand storage box is provided with a power shaft which is driven to rotate by a driving element; the power shaft is provided with a cam which is in contact with the filling cover, and the cam rotates under the transmission of the driving element to drive the filling cover to rotate and open by taking the hinged part as an axis; a torsional spring which enables the filling cover to return to close the filling opening is further arranged at the hinged position of the filling cover;

the shovel is installed on the power shaft and can be rotated under the transmission of driving element and shovels cat litter or excrement in the cat litter basin body and sends the cat litter or excrement into the collector.

6. The automatic sand changing device according to claim 5, wherein: the cat litter basin body is of an arc-shaped groove structure; the inner wall of the cat litter box body is provided with at least one protruding rib; the protruding ribs are of arc-shaped structures which are gradually thinned from the bottommost part of the cat litter basin body to the edges of the two sides until the protruding ribs are flush with the side wall of the cat litter basin body.

7. The automatic sand changing device according to claim 5, wherein: a corridor mechanism is arranged at the top of the collector; the corridor mechanism comprises a door arranged on a side plate of the frame body and a corridor hinged on the side plate; the corridor covers the top surface of the collector and is provided with sand leakage holes; a guide plate which inclines towards the cat litter basin body is arranged below the corridor; the both sides of guide plate are equipped with the push rod that extends to cat litter basin body top, the base gets into the push rod below and lifts guide plate and vestibule simultaneously and makes the collector top surface expose when following the shovel arm rotation.

8. The automatic sand changing device according to claim 7, wherein: a screen plate is also vertically arranged on the corridor; the screen plate is positioned at the front side of the door entering direction.

9. The automatic sand changing device according to claim 7, wherein: the system also comprises a control system; the control system comprises a gravity sensing device arranged on the cat litter box body and an infrared sensing device arranged on the door; and the control system receives signals of the gravity sensing device and the infrared sensing device and drives the power shaft to rotate anticlockwise or rotate clockwise for a specified angle.

10. An automatic sand changing device according to any one of claims 5 to 9, wherein: also comprises a deodorization device; the deodorization device comprises a negative ion generator and a deodorization and sterilization module; the deodorization and sterilization module is fixed at the bottom of the sand storage box; the negative ion generator is arranged on the side surface of the collector.

Images