Suction system of cleaner

Abstract

In a suction system of a cleaner, by including at least two brushes rotatively installed at a certain side of a suction hole formed at the bottom surface of a cleaner body so as to be connected to a suction pipe and suck dust and filth on a floor; and driving units for rotating the brushes separately, although a size of filth is big or there are lots of filth, it is possible to clean it sufficiently, and accordingly a cleaning performance can be improved.

What is claimed is:  
     
         1 . A suction system of a cleaner, comprising: 
 a suction motor disposed in a cleaner body for generating a suction force;    a filter connected to the suction motor for collecting dust and filth;    a suction hole formed at the bottom of the cleaner body and connected to the filter through the suction pipe in order to suck dust and filth on a floor;    at least two brushes rotatively installed at a certain side of the suction hole for sweeping up filth on the floor into the suction hole; and    driving units for rotating the brushes separately.    
     
     
         2 . The suction system of  claim 1 , wherein the brushes consist of a first brush and a second brush arranged at the suction hole so as to face each other with a certain interval.  
     
     
         3 . The suction system of  claim 2 , wherein a first hinge shaft and a second hinge shaft are fixed in the length direction of the first and second brushes, the both ends of the first and second hinge shafts are rotatively installed at the certain side of the suction hole, and the first and second hinge shafts are respectively connected to the driving units.  
     
     
         4 . The suction system of  claim 3 , wherein the driving units consist of a first driving unit for rotating the first hinge shaft and a second driving unit for rotating the second hinge shaft.  
     
     
         5 . The suction system of  claim 4 , wherein the first and second driving units respectively include a first and a second driving motors operated in a forward direction and a reverse direction according to a signal applied from a control unit; and a power transmitting unit connected between the first and second driving motors and the first and second hinge shafts in order to transmit the rotational force of the first and second driving motors to the first and second hinge shafts.  
     
     
         6 . The suction system of  claim 5 , wherein the power transmitting unit includes driving pulleys respectively fixed to the rotational shafts of the first and second driving motors; driven pulleys respectively fixed to the first and second hinge shafts; and belts wound between the driving pulleys and the driven pulleys.  
     
     
         7 . The suction system of  claim 6 , wherein the belt is a timing belt.  
     
     
         8 . The suction system of  claim 5 , wherein the power transmitting unit includes driving gears respectively fixed to the rotational shafts of the first and second driving motors; and driven gears respectively engaged with the driving gears and fixed to the first and second hinge shafts.  
     
     
         9 . In a robot cleaner having a suction hole for sucking dust and filth and performing cleaning operation while moving by itself, a suction system of a cleaner, comprising: 
 at least two brushes rotatively installed at a certain side of a suction hole and sweeping up filth into the suction hole; and    a driving unit for rotating the brushes separately.    
     
     
         10 . The suction system of  claim 9 , wherein the brushes consist of a first brush and a second brush arranged on the suction hole so as to face each other with a certain interval.  
     
     
         11 . The suction system of  claim 10 , wherein a first hinge shaft and a second hinge shaft are fixed in the length direction of the first and second brushes, the both ends of the first and second hinge shafts are rotatively installed at the certain side of the suction hole, and the first and second hinge shafts are respectively connected to the driving units.  
     
     
         12 . The suction system of  claim 11 , wherein the driving units consist of a first driving unit for rotating the first hinge shaft and a second driving unit for rotating the second hinge shaft.  
     
     
         13 . The suction system of  claim 12 , wherein the first and second driving units respectively include a first and a second driving motors operated in a forward direction and a reverse direction according to a signal applied from a control unit; and a power transmitting unit connected between the first and second driving motors and the first and second hinge shafts in order to transmit the rotational force of the first and second driving motors to the first and second hinge shafts.  
     
     
         14 . The suction system of  claim 13 , wherein the power transmitting unit includes driving pulleys respectively fixed to the rotational shafts of the first and second driving motors; driven pulleys respectively fixed to the first and second hinge shafts; and belts wound between the driving pulleys and the driven pulleys.  
     
     
         15 . The suction system of  claim 14 , wherein the belt is a timing belt.  
     
     
         16 . The suction system of  claim 13 , wherein the power transmitting unit includes driving gears respectively fixed to the rotational shafts of the first and second driving motors; and driven gears respectively engaged with the driving gears and fixed to the first and second hinge shafts.