Counterweight incorporated into slider block for scroll compressor

Abstract

A slider block has an inner bore which receives an eccentric pin, and a generally flat drive surface over a limited circumferential extent to be engaged by a flat drive surface on an eccentric pin. A counterweight is positioned on an outer periphery of the slider block. The counterweight has a center line defining a first plane. A second plane is defined parallel to the first plane, with the second plane including a point on the flat drive surface of the slider block, with the flat drive surface of the slider block including a third plane, and a non-zero angle defined between the second and third planes.

1 . A scroll compressor comprising:
 a first scroll member and a second scroll member, each of said first and second scroll members having a base and a generally spiral wrap extending from their base;   said second scroll member having a boss extending away from said base in an opposed direction to said wrap;   a motor for driving a drive shaft, said drive shaft having an eccentric pin, said eccentric pin extending upwardly into a slider block, said slider block being received between said pin and an interior surface of said boss, and said slider block having an inner bore which receives said eccentric pin, and having a generally flat drive surface over a limited circumferential extent to be engaged by a flat drive surface on said eccentric pin;   a counterweight positioned on an outer periphery of said slider block; and   said counterweight having a center line, and a second line being defined parallel to said center line, with said second line including a point on said flat drive surface of said slider block, with said flat drive surface of said slider block defining a plane, and a non-zero angle defined between said second line and said plane.   
     
     
         2 . The scroll compressor as set forth in  claim 1 , wherein said angle is between 6° and 40°. 
     
     
         3 . The scroll compressor as set forth in  claim 2 , wherein a locating feature is provided between said counterweight and said slider block. 
     
     
         4 . The scroll compressor as set forth in  claim 3 , wherein said locating feature is a flat portion provided between the counterweight and the slider block. 
     
     
         5 . The scroll compressor as set forth in  claim 2 , wherein said angle is between 5° and 20°. 
     
     
         6 . The scroll compressor as set forth in  claim 5 , wherein said angle is between 7.5° and 17.5°. 
     
     
         7 . The scroll compressor as set forth in  claim 1 , wherein said counterweight having a ring portion surrounding said slider block, and an extending portion extending upwardly and partially surrounding an outer peripheral surface of said boss. 
     
     
         8 . The scroll compressor as set forth in  claim 7 , wherein said extending portion having an angled surface extending from said ring portion into said extending portion. 
     
     
         9 . The scroll compressor as set forth in  claim 8 , wherein a second angle is defined from the angled surface relative to a plane which is perpendicular to a drive axis of the drive shaft, the second angle being between 20° and 60°. 
     
     
         10 . The scroll compressor as set forth in  claim 1 , wherein a circumferential extent of said extending portion is formed at a third angle relative to a top surface of said ring portion, with said third angle being between 95° and 125°. 
     
     
         11 . The scroll compressor as set forth in  claim 1 , wherein a locating feature is provided between said counterweight and said slider block. 
     
     
         12 . The scroll compressor as set forth in  claim 11 , wherein said locating feature is a flat portion provided between the counterweight and the slider block. 
     
     
         13 . The scroll compressor as set forth in  claim 1 , wherein a hydrodynamic oil bearing is positioned between an inner surface of said boss, and an outer surface of said slider block.