Patent ID: 7121932

Claim:
A portable drill sharpener comprising: a casing ( 10 ) having a power supply ( 100 ), said power supply driving a sand-wheel ( 20 ); a positioning device ( 30 ), said positioning device being coupled to said casing; a first grinding unit ( 40 ) being fixed on said casing ( 10 ) and displaceable in a horizontal direction, said first grinding unit ( 40 ) having an adjustment slot ( 41 ) and an adjustment bolt ( 42 ) extending through said adjustment slot ( 41 ), said adjustment bolt ( 42 ) fixing said first grinding unit ( 40 ) on said casing ( 10 ); a rotatable frame ( 45 ) coupled to a vertical wall of said first grinding unit ( 40 ) having an insertion hole ( 450 ) defined through a center of said rotatable frame ( 45 ); a holding member ( 60 ) being positioned within said insertion hole ( 450 ) at an inclined angle; a positioning member ( 46 ) coupled to an outside of said rotatable frame ( 45 ); a plurality of limitation rods ( 47 , 48 ) extending from said first grinding unit ( 40 ) for limiting the rotation of said rotatable frame ( 45 ); a first adjustment unit ( 80 ) coupled to a bottom of said first grinding unit ( 40 ) for displacing said first grinding unit ( 40 ) along a common axis of said sand-wheel ( 20 ), said adjustment unit ( 80 ) being fixedly attached to said casing ( 10 ) and having a guide rail ( 81 ) with two flanges on two sides thereof; a sliding frame ( 82 ) mounted on said guide rail ( 81 ) and having two hooks ( 820 ) corresponding to said two flanges ( 8100 , said sliding frame ( 82 ) coupled to said adjustment bolt ( 42 ) and a positioning bolt ( 44 ) of said first grinding unit ( 40 ); an end piece ( 83 ) positioned at one end of said first adjustment unit ( 80 ) for limiting displacement of said sliding frame ( 82 ); a second grinding unit ( 50 ), said second grinding unit being coupled to said casing; a holding member ( 60 ) adapted to position a drill ( 70 ) to be ground; and a second adjustment unit ( 90 ) respectively connected to the second grinding units ( 50 ), said second adjustment unit ( 90 ) including a guide rail ( 91 ) and a sliding frame ( 92 ), said sliding frame ( 92 ) being slidably mounted on the guide rail ( 91 ), the first and second grinding units ( 40 ), ( 50 ) having at least one axis along which the first and second grinding units are adjustable.