Drive shaft for compressor

Abstract

A compressor assembly that includes a driveshaft and at least one eccentric press-fit to the shaft. In one embodiment, the driveshaft includes an opening at a first end and the eccentric includes a linking rod press-fit into the opening. During assembly, the first end of the shaft is inserted through an opening in a rotor and the eccentric is then press-fit to the first end. This arrangement allows the opening in the rotor to closely receive the driveshaft and allows the eccentric to be assembled to the compressor without passing the eccentric through the rotor opening. In use, the eccentric is operably engaged with a compressor mechanism such as, for example, a rotary compression mechanism, a reciprocating piston mechanism, or an orbiting scroll mechanism. In one embodiment, a second eccentric is press-fit to a second end of the driveshaft and is operably engaged with a second compressor mechanism.

1 . A compressor, comprising: 
 a motor including a rotor;    a driveshaft operably engaged with said rotor, said driveshaft including a first end extending from said rotor; and    a first eccentric press-fit to said first end of said driveshaft.    
   
   
       2 . The compressor of  claim 1 , wherein said driveshaft includes an opening, said opening including an inside surface, and wherein said inside surface of said opening bears against an outside surface of said first eccentric.  
   
   
       3 . The compressor of  claim 1 , wherein said driveshaft includes an opening, wherein said first eccentric includes a linking rod, and wherein said linking rod is press-fit into said opening.  
   
   
       4 . The compressor of  claim 4 , wherein said linking rod includes a recess in fluid communication with said driveshaft opening, and wherein said driveshaft includes a lubricant aperture in fluid communication with said recess, whereby lubricant may flow between said driveshaft opening and an outside surface of said driveshaft.  
   
   
       5 . The compressor of  claim 1 , further including a second eccentric press-fit to a second end of said driveshaft.  
   
   
       6 . The compressor of  claim 5 , wherein said driveshaft includes a second opening, wherein said second eccentric includes a linking rod, and wherein said linking rod is press-fit into said second opening.  
   
   
       7 . The compressor of  claim 1 , wherein the engagement of said first eccentric and said driveshaft is fastener-less.  
   
   
       8 . A compressor, comprising: 
 a motor;    a driveshaft operably engaged with said motor; and    a first eccentric, wherein one of said driveshaft and said first eccentric includes a first opening, and wherein the other of said driveshaft and said first eccentric is press-fit into said first opening.    
   
   
       9 . The compressor of  claim 8 , wherein said driveshaft includes said opening, said opening including an inside surface, and wherein said inside surface of said opening bears against an outside surface of said first eccentric.  
   
   
       10 . The compressor of  claim 8 , wherein said driveshaft includes said opening, wherein said first eccentric includes a projection, and wherein said projection is press-fit into said opening.  
   
   
       11 . The compressor of  claim 10 , wherein said projection includes a recess in fluid communication with said driveshaft opening, and wherein said driveshaft includes a lubricant aperture in fluid communication with said recess, whereby lubricant may flow between said driveshaft opening and an outside surface of said driveshaft.  
   
   
       12 . The compressor of  claim 8 , further including a second eccentric, wherein one of said driveshaft and said second eccentric includes a second opening, and the other of said driveshaft and said second eccentric is press-fit into said second opening.  
   
   
       13 . The compressor of  claim 12 , wherein said driveshaft includes said second opening, wherein said second eccentric includes a second projection, and wherein said second projection is press-fit into said second opening.  
   
   
       14 . The compressor of  claim 8 , wherein the engagement of said first eccentric and said driveshaft is fastener-less.  
   
   
       15 . A method of assembling a compressor, comprising the steps of: 
 inserting a first end of a driveshaft through an opening in a rotor;    securing the rotor to the driveshaft; and    press-fitting a first eccentric to the first end of the driveshaft.    
   
   
       16 . The method of  claim 15 , wherein the first end of the driveshaft includes a first opening, wherein the first eccentric includes a projection, and wherein said pres-fitting step includes the step of aligning the projection of the first eccentric with the first opening of the driveshaft and forcing the projection into the opening.  
   
   
       17 . The method of  claim 15 , wherein the driveshaft includes a second end, said method further comprising the step of press-fitting a second eccentric to the second end of the driveshaft.  
   
   
       18 . The method of  claim 17 , wherein the second end of the driveshaft includes a second opening, wherein the second eccentric includes a second projection, and wherein said pres-fitting step includes the step of aligning the second projection of the second eccentric with the second opening of the driveshaft and forcing the second projection into the second opening.