Wheel grinder and balancing apparatus for the same

Abstract

Disclosed are a balancing apparatus for a grinding stone to automatically adjust the balance of the grinding stone during the rotation of the grinding stone and a wheel grinder having the balancing apparatus. The balancing apparatus has a flange having a ring-shaped weight groove, a weight member received in the weight groove and a fluid filled in the weight groove. The weight groove is covered with cover. When the grinding stone rotates at high speed, the balance of the grinding stone is automatically adjusted by means of the weight member, thereby rapidly accomplishing the balance adjustment of the grinding stone. In addition, separate balancing process is not demanded after the dressing process due to the abrasion of the grinding stone.

What is claimed is:  
     
         1 . A wheel grinder having a main body, a spindle rotatably installed on the main body and a grinding stone installed on the main body through the spindle, which comprises: 
 a balancing apparatus for supporting the grinding stone and adjusting a balance of the grinding stone, said balancing apparatus being disposed on one side of the grinding stone; and    fixing means for fixing the grinding stone to the spindle with said balancing apparatus.    
     
     
         2 . The wheel grinder as recited in  claim 1 , wherein said balancing apparatus further comprises: 
 a flange for the grinding stone having a ring-shaped groove formed on one side of said flange;    at least one weight means received in said weight groove of said flange; and    a cover for covering said weight groove of said flange.    
     
     
         3 . The wheel grinder as recited in  claim 2 , wherein a fluid such as an oil is filled in said weight groove.  
     
     
         4 . The wheel grinder as recited in  claim 2 , wherein said weight groove has a rectangular-shaped cross section.  
     
     
         5 . The wheel grinder as recited in  claim 4 , wherein a guiding groove having a semicircular shape is formed on a bottom of said weight groove and a semicircular groove is formed on a bottom of said cover so that said weight groove has a circular-shaped cross section by combining the guiding groove with the semicircular groove.  
     
     
         6 . The wheel grinder as recited in  claim 4 , wherein a bottom of said weight groove is inclined and a bottom of said cover is inclined opposed to the bottom of said weight groove so that said weight groove has a triangular-shaped cross section by combining the bottom of said cover with an inside of said weight groove.  
     
     
         7 . The wheel grinder as recited in  claim 2 , wherein said weight groove is formed on one side of said flange of which the other side is attached to said grinding stone.  
     
     
         8 . The wheel grinder as recited in  claim 2 , wherein said weight means has a ball shape.  
     
     
         9 . The wheel grinder as recited in  claim 2 , wherein said weight means has an arch shape having a curvature identical to a circumference of said weight groove.  
     
     
         10 . The wheel grinder as recited in  claim 1 , wherein said balancing apparatus comprises: 
 a flange for the grinding stone having a ring-shaped weight groove formed on one side of said flange;    a weight housing formed on said weight groove of said flange;    at least one weight means received in said weight housing; and    a cover for covering said weight housing.    
     
     
         11 . The wheel grinder as recited in  claim 10 , wherein a fluid such as an oil is filled in said weight housing.  
     
     
         12 . The wheel grinder as recited in  claim 10 , wherein said weight means has a ball shape.  
     
     
         13 . The wheel grinder as recited in  claim 10 , wherein said weight means has an arch shape having a curvature identical to a circumference of said weight groove.  
     
     
         14 . The wheel grinder as recited in  claim 1 , wherein said balancing apparatus comprises: 
 a flange for the grinding stone having one side for supporting one side of the grinding stone;    a ring-shaped weight tube attached to the other side of said flange; and    at least one weight means received in said weight tube.    
     
     
         15 . The wheel grinder as recited in  claim 14 , wherein a fluid such as an oil is filled in said weight tube.  
     
     
         16 . The wheel grinder as recited in  claim 14 , wherein said weight means has a ball shape.  
     
     
         17 . The wheel grinder as recited in  claim 14 , wherein said weight means has an arch shape having a curvature identical to a circumference of said weight tube.  
     
     
         18 . A wheel grinder having a main body, a spindle rotatably installed on the main body and a grinding stone installed on the main body through the spindle, which comprises: 
 two balancing apparatuses for supporting the grinding stone and adjusting a balance of the grinding stone, said balancing apparatuses being respectively disposed on both side of the grinding stone; and    fixing means for fixing the grinding stone to the spindle with said balancing apparatuses.    
     
     
         19 . The wheel grinder as recited in  claim 19 , wherein said balancing apparatuses comprises: 
 a flange for the grinding stone having a ring-shaped weight groove formed one side of said flange;    at least one weight means received in said weight groove; and    a cover for covering said weight groove of said flange.    
     
     
         20 . The wheel grinder as recited in  claim 19 , wherein a fluid such as an oil is filled in said weight groove.  
     
     
         21 . The wheel grinder as recited in  claim 18 , wherein said balancing apparatuses comprises; 
 a flange for the grinding stone having a ring-shaped weight groove formed on one side of said flange;    a weight housing formed on said weight groove of said flange;    at least one weight means received in said weight housing; and    a cover for covering said weight housing.    
     
     
         22 . The wheel grinder as recited in  claim 21 , wherein a fluid such as an oil is filled in said weight housing.  
     
     
         23 . The wheel grinder as recited in  claim 21 , wherein said balancing apparatuses comprises: 
 a flange for the grinding stone having one side for supporting one side of the grinding stone;    a ring-shaped weight tube attached to the other side of said flange; and    at least one weight means received in said weight tube.    
     
     
         24 . The wheel grinder as recited in  claim 21 , wherein a fluid such as an oil is filled in said weight tube.  
     
     
         25 . A balancing apparatus for a wheel grinder having a grinding stone rotating at a predetermined speed by a spindle, which comprises: 
 a flange for supporting one side of the grinding stone, said flange having a ring-shaped weight groove formed on one side of said flange;    at least one weight means received in said weight groove; and    a cover for covering said weight groove.    
     
     
         26 . The balancing apparatus for a wheel grinder as recited in  claim 25 , wherein a fluid such as an oil is filled in said weight groove.  
     
     
         27 . The balancing apparatus for a wheel grinder as recited in  claim 25 , wherein said weight groove has a rectangular-shaped cross section.  
     
     
         28 . The balancing apparatus for a wheel grinder as recited in  claim 25 , wherein a guiding groove having semicircular shape is formed on a bottom of said weight groove and a semicircular groove is formed on a bottom of said cover so that said weight groove has a circular-shaped cross section by combining the guiding groove with the semicircular groove.  
     
     
         29 . The balancing apparatus for a wheel grinder as recited in  claim 25 , wherein a bottom of said weight groove is inclined and a bottom of said cover is inclined opposed to the bottom of said weight groove so that said weight groove has a triangular-shaped cross section by combining the bottom of said cover with an inside of said weight groove.  
     
     
         30 . The balancing apparatus for a wheel grinder as recited in  claim 25 , wherein said weight groove is formed on one face of said flange of which the other face is attached to said grinding stone.  
     
     
         31 . The balancing apparatus for a wheel grinder as recited in  claim 25 , wherein said weight means has a ball shape.  
     
     
         32 . The balancing apparatus for a wheel grinder as recited in  claim 25 , wherein said weight means has an arch shape having a curvature identical to a circumference of said weight groove.  
     
     
         33 . A balancing apparatus for a wheel grinder having a grinding stone rotating at a predetermined speed by a spindle, which comprises: 
 a flange for supporting one side of the grinding stone, said flange having a ring-shaped weight groove formed on one side of said flange;    a weight housing formed on said weight groove;    at least one weight means received in said weight housing; and    a cover for covering said weight housing.    
     
     
         34 . The balancing apparatus for a wheel grinder as recited in  claim 33 , wherein a fluid such as an oil is filled in said weight housing.  
     
     
         35 . The balancing apparatus for a wheel grinder as recited in  claim 33 , wherein said weight means has a ball shape.  
     
     
         36 . The balancing apparatus for a wheel grinder as recited in  claim 33 , wherein said weight means has an arch shape having a curvature identical to a circumference of said weight groove.  
     
     
         37 . A balancing apparatus for a wheel grinder having a grinding stone rotating at a predetermined speed by a spindle, which comprises: 
 a flange for supporting one side of the grinding stone at one side;    a ring-shaped weight tube attached to the other side of said flange; and    at least one weight means received in said weight tube.    
     
     
         38 . The balancing apparatus for a wheel grinder as recited in  claim 37 , wherein a fluid such as an oil is filled in said weight tube.  
     
     
         39 . The balancing apparatus for a wheel grinder as recited in  claim 37 , wherein said weight means has a ball shape.  
     
     
         40 . The balancing apparatus for a wheel grinder as recited in  claim 37 , wherein said weight means has an arch shape having a curvature identical to a circumference of said weight tube.