Self-propelled cleaning device

Abstract

A self-propelled cleaning device includes a chassis with a protrusion, such that a side brush mechanism is proximate to the external periphery of the contour of the chassis, and an elastic element installed between a driving wheel set and the chassis for providing buffer and shock absorption. An interval is formed between the front edge of the chassis and a dust inlet for guiding dust into a dust collecting case in a chassis containing groove, and the containing groove has a first spacer apart from a control unit and a second spacer separating a carrying space from a negative pressure device. The second spacer has a passage interconnecting the containing groove and the carrying space, and the dust collecting case has separated first and second sides. The first side has a negative pressure outlet, and the negative pressure device has a negative pressure guide channel and a negative pressure inlet corresponding to the hollow passage in the second spacer of the chassis containing groove and a negative pressure outlet of the dust collecting case respectively to allow air to flow through.

What is claimed is: 
     
         1 . A self-propelled cleaning device, comprising:
 a chassis, including a side brush mechanism for executing a cleaning function, a driving wheel set for carrying and moving the chassis, a dust collecting case for collecting dust, a negative pressure device having a vent for discharging air to provide a negative pressure suction, and a control unit for executing a system control;   wherein, the chassis has a protrusion protruded and extended from the external periphery of the contour of the chassis, and the side brush mechanism performs a rotational sweeping by a driven bristle, and the protrusion moves the installation position of the side brush mechanism closer to the external periphery of the contour of the chassis.   
     
     
         2 . The self-propelled cleaning device of  claim 1 , wherein the bristle of the side brush mechanism has a cleaning range with an outermost tangent deviated by a spacing from the outermost tangent of the diameter of the chassis. 
     
     
         3 . A self-propelled cleaning device, comprising:
 a chassis, including a side brush mechanism for executing a cleaning function, a driving wheel set for carrying and moving the chassis, a dust collecting case for collecting dust, a negative pressure device having a vent for discharging air to provide a negative pressure suction, and a control unit for executing a system control;   wherein, the driving wheel set uses a motor to drive a wheel by a gear set installed in a housing; and an elastic element is installed between the housing of the driving wheel set and a surface of an inner side of the upper casing of the chassis, and the driving wheel set uses a pivot as the center of rotation, and the elastic element provides an elastic driving force to maintain the contact of the wheel with the ground and provides buffer and shock absorbing effects when a vibration is produced.   
     
     
         4 . A self-propelled cleaning device, comprising:
 a chassis, including a side brush mechanism for executing a cleaning function, a driving wheel set for carrying and moving the chassis, a dust collecting case for collecting dust, a negative pressure device having a vent for discharging air to provide a negative pressure suction, and a control unit for executing a system control;   wherein, an upper casing of the chassis has an inwardly and concavely formed containing groove with an opening for accommodating the dust collecting case, and the containing groove has a first spacer apart from the control unit and a second spacer for separating the containing groove from a carrying space of the negative pressure device, and an inclined edge is formed at a position near the top of the second spacer and has a hollow passage for interconnecting the containing groove and the carrying space with each other, and the lower casing disposed at the bottom of the containing groove has a hollow hole.   
     
     
         5 . The self-propelled cleaning device of  claim 4 , wherein the dust collecting case includes a container, and a first side and a second side formed on both sides of the bottom of the container dust collecting space respectively and separated with an appropriate interval apart from each other, and the bottom has a dust inlet, and an inclined surface is disposed at a position near the top of the first side, such that an accommodating space is concavely formed on the first side and disposed at the position, and the accommodating space has a negative pressure outlet formed thereon. 
     
     
         6 . The self-propelled cleaning device of  claim 4 , wherein the negative pressure device includes a fan driven by a motor, a shaft cover driven by the motor to rotate the fan, and an outer frame coaxial with the shaft cover and connected to the bottom edge with an appropriate interval apart from each other, and an annular airflow passage is formed in a space between the shaft cover and the outer frame, and the outer frame has a plurality of vanes formed around the outer frame, and a negative pressure guide channel with a flat area is formed at the top of the annular airflow passage, and an end of the negative pressure guide channel has a negative pressure inlet, and the motor drives the shaft cover to link and rotate the vanes of the outer frame in order to discharge the air inside the annular airflow passage to the outside through the vent, so that a negative pressure is formed inside the annular airflow passage, and the negative pressure drives the negative pressure guide channel to suck air from the negative pressure inlet. 
     
     
         7 . A self-propelled cleaning device, comprising:
 a chassis, including a side brush mechanism for executing a cleaning function, a driving wheel set for carrying and moving the chassis, a dust collecting case for collecting dust, a negative pressure device having a vent for discharging air to provide a negative pressure suction, and a control unit for executing a system control;   wherein the dust collecting case includes a container, a first side and a second side disposed on both sides of the bottom inside the container dust collecting space respectively and separated with an appropriate interval apart from each other, and the bottom has a dust inlet, and an inclined surface is disposed at a position near the top of the first side, so that an accommodating space is concavely formed on the first side and at the position, and the accommodating space has a negative pressure outlet.   
     
     
         8 . A self-propelled cleaning device, comprising:
 a chassis, including a side brush mechanism for executing a cleaning function, a driving wheel set for carrying and moving the chassis, a dust collecting case for collecting dust, a negative pressure device having a vent for discharging air to provide a negative pressure suction, and a control unit for executing a system control;   wherein, the chassis has a containing groove for accommodating the dust collecting case, and the dust collecting case includes a container, and a first side and a second side disposed on both sides of the bottom inside the bottom of the container dust collecting space and separated with an appropriate interval apart from each other, and the bottom has a dust inlet, and the first side has a negative pressure outlet, and the containing groove of the chassis has a first spacer apart from the control unit and a second spacer apart from a carrying space of the negative pressure device, and the second spacer has a hollow passage for interconnecting the containing groove and the carrying space with each other, and the negative pressure device has a negative pressure guide channel with a negative pressure inlet aligned with the hollow passage on the second spacer of the chassis containing groove and the negative pressure outlet of the dust collecting case to allow air to flow through.   
     
     
         9 . The self-propelled cleaning device of  claim 8 , wherein the first side of the dust collecting case has an accommodating space concavely formed therein, and the second spacer of the chassis has a concave space formed on a side of the carrying space and a portion protruded from a side of the containing groove, and the negative pressure inlet of the negative pressure device is embedded into the concave space, and the portion protruded from the containing groove of the second spacer is embedded into the accommodating space concavely formed on the first side of the dust collecting case. 
     
     
         10 . The self-propelled cleaning device of  claim 5 ,  7  or  8 , further comprising a negative airflow path formed between the dust inlet and the negative pressure outlet and situated between the first side and the second side, and a mesh filter vertically installed and disposed proximate to the first side of the negative pressure outlet. 
     
     
         11 . The self-propelled cleaning device of  claim 5 ,  7  or  8 , wherein the dust inlet is comprised of a strip embedding element installed at the dust inlet, and a fixing edge is formed and extended from the top end of the embedding element, and a fastener is provided for fixing the fixing edge to the bottom of the container. 
     
     
         12 . The self-propelled cleaning device of  claim 5 ,  7  or  8 , wherein the dust inlet has a front blocking edge and a rear blocking edge extended downward from the front and rear sides of the dust inlet respectively, and the front blocking edge is a component for passing a negative pressure airflow for vacuuming dust, and the front blocking edge has a relatively shorter downwardly extended length and includes a plurality of wedge-shaped airflow channels, and the rear blocking edge has a relatively longer downwardly extended length and almost reaches the floor for blocking the negative pressure airflow from passing through. 
     
     
         13 . The self-propelled cleaning device of  claim 5 ,  7  or  8 , wherein the dust inlet is disposed at an outlet end inside the dust collecting space and covered by a shutter, and the shutter is pivotally installed to a vertical pivot pin on the bottom adjacent to the dust inlet. 
     
     
         14 . The self-propelled cleaning device of  claim 5 ,  7  or  8 , wherein the dust inlet is disposed at an outlet end inside the dust collecting space and situated at a position higher than the bottom of the dust collecting space. 
     
     
         15 . A self-propelled cleaning device, comprising:
 a chassis, including a side brush mechanism for executing a cleaning function, a driving wheel set for carrying and moving the chassis, a dust collecting case for collecting dust, a negative pressure device having a vent for discharging air to provide a negative pressure suction, and a control unit for executing a system control;   wherein, the negative pressure device includes a fan driven by a motor, a shaft cover driven by the motor to rotate the fan, and an outer frame coaxial with the shaft cover and connected to the bottom edge with an appropriate interval apart from each other, and an annular airflow passage is formed between the shaft cover and the outer frame, and the outer frame has a plurality of vanes formed around the outer frame, and a negative pressure guide channel with a flat area is formed at the top of the annular airflow passage, and an end of the negative pressure guide channel has a negative pressure inlet, and the motor drives the shaft cover to link and rotate the vanes of the outer frame in order to discharge the air inside the annular airflow passage to the outside through the vent, so that a negative pressure is formed inside the annular airflow passage, and the negative pressure drives the negative pressure guide channel to such air from the negative pressure inlet.   
     
     
         16 . The self-propelled cleaning device of  claim 6  or  15 , wherein the motor is installed in and covered by a load compartment of a bottom shell with an opening facing downward, and the bottom shell has a receiving space disposed around the periphery of the load compartment and being an opening facing upward, and the receiving space is provided for receiving the outer frame and the vanes. 
     
     
         17 . A self-propelled cleaning device, comprising:
 a chassis, including a side brush mechanism for executing a cleaning function, a driving wheel set for carrying and moving the chassis, a dust collecting case for guiding and collecting dust from a dust inlet, a negative pressure device having a vent for discharging air to provide a negative pressure suction, and a control unit for executing a system control;   wherein, a concave interval with an airflow guiding effect is extended from the front end of the bottom of the chassis to the dust inlet, so that the negative pressure airflow can carry and flow dust easily.   
     
     
         18 . The self-propelled cleaning device of  claim 4  or  8 , wherein the negative pressure device is installed in a positioning interval formed precisely at a positioning frame of the lower casing under the carrying space.