Vacuum cleaner having brush motor using deceleration rate

Abstract

A vacuum cleaner includes: a main body; a suction brush configured to draw particulates into the main body; a motor installed at the main body; and a decelerating unit configured to connect a driving shaft of the motor with an impeller to transfer a rotation force of the driving shaft to the impeller and to set the rotation speed of the driving shaft lower than that of the impeller.

1 . A vacuum cleaner, comprising: 
 a main body;    a suction brush configured to draw particulates into the main body;    a motor installed at the main body; and    a deceleration unit configured to connect a driving shaft of the motor with an impeller to transfer a rotation force of the driving shaft to the impeller and to set a rotation speed of the driving shaft lower than that of the impeller.    
   
   
       2 . The vacuum cleaner as claimed in  claim 1 , wherein the deceleration unit comprises: 
 a first gear adapted to be connected to a first end of the driving shaft;    a second gear configured to engage the first gear and having a smaller diameter than the first gear; and    a rotation shaft adapted to have a first end connected to a center of the impeller,    wherein a center of the rotation shaft is adapted to be connected to the second gear.    
   
   
       3 . The vacuum cleaner as claimed in  claim 2 , wherein the first and second gears include at least one of a spur gear and a helical gear.  
   
   
       4 . The vacuum cleaner as claimed in  claim 1 , wherein the deceleration unit comprises: 
 a first pulley positioned at an outer circumference of one end of the driving shaft of the motor;    a second pulley that has a smaller diameter than the first pulley;    a driving belt that connects the first pulley with the second pulley to transfer the rotation driving force of the first pulley to the second pulley; and    a rotation shaft that has a first end connected to the center of the impeller and a center connected to the second pulley by passing through the second pulley.    
   
   
       5 . A deceleration unit for a vacuum cleaner, comprising: 
 a first gear adapted to be connected to a first end of a driving shaft of a motor;    a second gear having a smaller diameter than the first gear and configured to engage the first gear;    a rotation shaft configured to be connected to an impeller,    wherein the second gear is adapted to be connected to a center of the rotation shaft.    
   
   
       6 . The deceleration unit as claimed in  claim 5 , wherein the first gear includes at least one of a spur gear and a helical gear.  
   
   
       7 . The deceleration unit as claimed in  claim 6 , wherein the second gear includes at least one of a spur gear and a helical gear.  
   
   
       8 . The deceleration unit as claimed in  claim 5 , wherein the second gear includes at least one of a spur gear and a helical gear.  
   
   
       9 . A deceleration unit for a vacuum cleaner, comprising: 
 a first pulley;    a second pulley;    a driving belt configured to connect the first pulley to the second pulley to transfer a driving force from the first pulley to the second pulley; and    a rotation shaft configured to be connected to the second pulley and to an impeller.    
   
   
       10 . The deceleration unit as claimed in  claim 9 , wherein the second pulley has a smaller diameter than the first pulley.  
   
   
       11 . A vacuum cleaner, comprising: 
 at least one motor including at least one driving shaft;    at least one impeller; and    means for setting a rotation speed of the at least one shaft lower than a rotation speed of the at least one impeller.