Automatic Cat Excrement Removing Device

Abstract

Some embodiments of the present disclosure provide an automatic cat excrement removing device, including: a ball compartment assembly configured to have at least three spaces including a working compartment, a screening compartment, and an excrement collection compartment; and a driving assembly configured to drive the ball compartment assembly to rotate, wherein when the ball compartment assembly rotates to a first position, the screening compartment is located at the lowest position of the ball compartment assembly, so that the cat litter falls into the screening compartment through the screening holes, while the cat excrement stays in the working compartment because the size of the cat excrement is larger than that of the screening holes; and when the ball compartment assembly rotates to a second position, the excrement collection compartment is located at the lowest position of the ball compartment assembly, so that the cat excrement falls into the excrement collection compartment.

What is claimed is: 
     
         1 . An automatic cat excrement removing device, comprising:
 a ball compartment assembly, configured to have at least three spaces comprising a working compartment used for holding cat litter and allowing a cat to excrete, a screening compartment for screening cat litter and cat excrement, and an excrement collection compartment for holding cat excrement, wherein a surface of the screening compartment facing a center of a circle of the ball compartment assembly is provided with a plurality of screening holes; and   a driving assembly, configured to drive the ball compartment assembly to automatically rotate, wherein   when the ball compartment assembly rotates to an initial position, the working compartment is located at a lowest position of the ball compartment assembly; when the ball compartment assembly rotates to a first position from the initial position, the screening compartment is located at the lowest position of the ball compartment assembly, so that the cat litter falls into the screening compartment through the plurality of screening holes, while the cat excrement stays in the working compartment because a size of the cat excrement is larger than a size of each of the plurality of screening holes; and   when the ball compartment assembly rotates to a second position, the excrement collection compartment is located at the lowest position of the ball compartment assembly, so that the cat excrement falls into the excrement collection compartment.   
     
     
         2 . The automatic cat excrement removing device as claimed in  claim 1 , wherein a peripheral contour of the ball compartment assembly is a shape of a revolving body, the peripheral contour of the ball compartment assembly is formed by the working compartment, the screening compartment and the excrement collection compartment. 
     
     
         3 . The automatic cat excrement removing device as claimed in  claim 2 , wherein a shaft end of the working compartment is provided with an inlet, which is configured to allow the cat to enter and exit the working compartment; and the excrement collection compartment is provided with an opening, which is configured to allow the cat excrement to fall into the excrement collection compartment. 
     
     
         4 . The automatic cat excrement removing device as claimed in  claim 2 , wherein the working compartment is disposed opposite to the screening compartment; and the excrement collection compartment is located on a side of the screening compartment, and is configured to cause the working compartment to be located near the highest position of the ball compartment assembly when the screening compartment or the excrement collection compartment is located at the lowest position of the ball compartment assembly. 
     
     
         5 . The automatic cat excrement removing device as claimed in  claim 2 , wherein an end of the excrement collection compartment is hinged to the working compartment, and is configured to turn outwards relative to the working compartment. 
     
     
         6 . The automatic cat excrement removing device as claimed in  claim 2 , wherein an excrement collection compartment cover plate assembly is disposed at an opening of the excrement collection compartment, and is configured to selectively open or close the opening; and the excrement collection compartment cover plate assembly and a mounting mating surface of the opening are configured to clamp an opening portion of a rubbish bag and allow the rubbish bag to maintain in an opening status. 
     
     
         7 . The automatic cat excrement removing device as claimed in  claim 6 , wherein the excrement collection compartment cover plate assembly comprises:
 a base, detachably connected to the opening; and   a cover plate, of which an end is hinged to the base, and configured to be in an open state under an action of self-gravity of the cover plate when the excrement collection compartment is at the lowest position of the ball compartment assembly, the cat excrement falling into the excrement collection compartment at the moment, wherein when the excrement collection compartment is at the highest position of the ball compartment assembly, the cover plate returns to a closed state under the action of self-gravity, and the cat excrement is locked in the excrement collection compartment at the moment.   
     
     
         8 . The automatic cat excrement removing device as claimed in  claim 7 , wherein the excrement collection compartment cover plate assembly further comprises:
 a first magnet, disposed on a free end of the cover plate, wherein a second magnet is disposed at a position of the base which corresponding to the first magnet, and is configured to guarantee the cover plate and the base to be always in a locking state during the rotation of the ball compartment assembly from the initial position to the second position; when the ball compartment assembly returns to the initial position, the cover plate rests on the base again under the action of self-gravity, and at the moment, the first magnet and the second magnet are re-adsorbed to reinforce a locking force between the cover plate and the base.   
     
     
         9 . The automatic cat excrement removing device as claimed in  claim 1 , further comprising:
 a sensing apparatus, configured to start, when the cat is sensed to leave the working compartment, the driving assembly to drive the ball compartment assembly to rotate from the initial position to the second position via the first position, until the cat excrement falls into the excrement collection compartment.   
     
     
         10 . The automatic cat excrement removing device as claimed in  claim 1 , further comprising:
 a litter-cleaning module, configured to start, when a user starts the litter-cleaning module, the driving assembly to drive the ball compartment assembly to reversely rotate from the initial position to the first position via the second position, until the cat litter completely falls into the excrement collection compartment.   
     
     
         11 . The automatic cat excrement removing device as claimed in  claim 1 , further comprising:
 a pedestal, wherein the ball compartment assembly is detachably mounted on the pedestal and rotates around its own axis relative to the pedestal;   wherein the driving assembly comprises:   a motor, fixedly disposed on the pedestal; and   a gear assembly, of which one end is fixed disposed on an output end of the motor, and an other end is selectively connected with the ball compartment assembly, and configured to drive the ball compartment assembly to rotate under the driving of the motor.   
     
     
         12 . The automatic cat excrement removing device as claimed in  claim 11 , wherein an end of the pedestal that is away from the gear assembly is further provided with rolling wheels, which are configured to support the ball compartment assembly when the ball compartment assembly is mounted on the pedestal; and when the ball compartment assembly rotates, the rolling wheels simultaneously rotate around their own axis. 
     
     
         13 . The automatic cat excrement removing device as claimed in  claim 3 , wherein a height of the inlet of the working compartment does not exceed 10 cm. 
     
     
         14 . The automatic cat excrement removing device as claimed in  claim 9 , wherein the sensing apparatus is a microwave radar, or a pyroelectric infrared sensor, or a thermopile infrared sensor, or an infrared intrusion detector, or a light-sensing sensor. 
     
     
         15 . The automatic cat excrement removing device as claimed in  claim 10 , wherein the litter-cleaning module is a button, or a touch key, or a module remotely controlled by means of Bluetooth, wifi and smart phone apps. 
     
     
         16 . The automatic cat excrement removing device as claimed in  claim 11 , wherein the gear assembly comprises: a driving gear, a first driven gear and a second driven gear; wherein the first driven gear comprises a large gear and a small gear that are coaxially and integrally disposed; one end of the driving gear is connected to an output end of the motor, and an other end of meshes with the large gear of the first driven gear; the small gear of the first driven gear selectively meshes with the second driven gear; the second driven gear is fixedly disposed on the ball compartment assembly.