Double piston for a compressor

Abstract

A double piston for a compressor, having an elongated piston carrier which has one piston on each end, and having a connecting rod, extending approximately parallel to the piston carrier, that is supported rotatably by means of a bearing on a bolt of the piston carrier and spaced apart from it is supportable on a cam of a drive mechanism by means of a connecting rod bearing. In a middle region that extends between the two pistons, the piston carrier includes an intermediate chamber, dimensioned to receive the connecting rod freely movably, in which the connecting rod is received freely movably.

1 . A double piston for a compressor, having an elongated piston carrier ( 11 ), which has one piston ( 12 ,  13 ) on each end, and having a connecting rod ( 14 ), extending approximately parallel to the piston carrier ( 11 ), which is coupled rotatably to the piston carrier ( 11 ) by means of a bearing ( 19 ) and is supportable, spaced apart from the coupling point, on a cam ( 15 ) of a drive mechanism by means of a connecting rod bearing ( 17 ), 
 wherein    the piston carrier ( 11 ), in a middle region ( 31 ) that extends between the two pistons ( 12 ,  13 ), has an intermediate chamber ( 32 ), dimensioned for receiving the connecting rod ( 14 ) freely movably, in which the connecting rod ( 14 ) is received freely movably.    
   
   
       2 . The double piston as recited in  claim 1 , 
 wherein    the piston carrier ( 11 ) has two webs ( 33 ,  34 ), extending approximately longitudinally and approximately parallel to one another, between which the intermediate chamber ( 32 ) is formed and the connecting rod ( 14 ) is received.    
   
   
       3 . The double piston as recited in  claim 1 , 
 wherein    the intermediate chamber ( 32 ) extends approximately within a plane ( 35 ) that is aligned with a diametral plane ( 36 ) of one piston ( 12 ) and a diametral plane ( 37 ), aligned with the latter diametral plane, of the other piston ( 13 ) and essentially represents the longitudinal plane of symmetry of the piston carrier ( 11 ), and the connecting rod ( 14 ) extends substantially within this plane ( 35 ).    
   
   
       4 . The double piston as recited in  claim 1 , 
 wherein    the connecting rod ( 14 ) is embodied as a rectilinear component, whose connecting rod bearing ( 17 ) and bearing ( 19 ) are located within a common longitudinal center plane, which coincides approximately with the plane of symmetry ( 35 ) of the piston carrier ( 11 ).    
   
   
       5 . The double piston as recited in  claim 1 , 
 wherein    the connecting rod ( 14 ) is retained with the bearing ( 19 ) on a bolt ( 18 ) of the piston carrier ( 11 ), and the bolt ( 18 ), extending transversely to the plane of symmetry ( 35 ), penetrates the intermediate chamber ( 32 ) and is received by both ends, and in particular is located fixedly, in the transversely spaced-apart webs ( 33 ,  34 ) of the piston carrier ( 11 ).    
   
   
       6 . The double piston as recited in  claim 5 , 
 wherein    the spaced-apart webs ( 33 ,  34 ) of the piston carrier ( 11 ), together with the bolt ( 18 ), form a bearing fork for one end of the connecting rod ( 14 ), which is received between them and is retained with the bearing ( 19 ) on the bolt ( 18 ), while the remainder of the connecting rod ( 14 ) extends freely into the intermediate chamber ( 32 ).    
   
   
       7 . The double piston as recited in  claim 1 , 
 wherein    a vibration damper ( 20 ) is located in the course of the connecting rod between the connecting rod bearing ( 17 ) and the coupling point (bearing  19 ).    
   
   
       8 . The double piston as recited in  claim 7 , 
 wherein    the vibration damper ( 20 ) is provided in the region of the connecting rod bearing ( 17 ).    
   
   
       9 . The double piston as recited in  claim 7 , 
 wherein    the vibration damper ( 20 ) has a vibration-damping bearing receptacle ( 21 ).    
   
   
       10 . The double piston as recited in  claim 9 , 
 wherein    the vibration-damping bearing receptacle ( 21 ) has a vibration-damping layer ( 22 ).    
   
   
       11 . The double piston as recited in  claim 10 , 
 wherein    the vibration-damping layer ( 22 ) of the bearing receptacle ( 21 ) is elastic, formed in particular of rubber, synthetic rubber, or the like.    
   
   
       12 . The double piston as recited in  claim 1 , 
 wherein    the vibration-damping layer ( 22 ) has a hardness of 80\ Shore A.    
   
   
       13 . The double piston as recited in  claim 1 , 
 wherein    the bearing receptacle is formed solely of the vibration-damping layer ( 22 ).    
   
   
       14 . The double piston as recited in  claim 1 , 
 wherein    the vibration-damping bearing receptacle ( 21 ) has a rubber spring.    
   
   
       15 . The double piston as recited in  claim 14 , 
 wherein    the rubber spring has two concentric rings ( 24 ,  25 ), in particular of metal, and between the rings ( 24 ,  25 ) it has an annular rubber layer ( 22 ) that is for instance integrally vulcanized on.    
   
   
       16 . The double piston as recited in claims  1 , 
 wherein    the connecting rod bearing ( 17 ) is embedded in the connecting rod ( 14 ) by means of the vibration-damping bearing receptacle ( 21 ).    
   
   
       17 . The double piston as recited in  claim 1 , 
 wherein    the bearing ( 19 ) of the coupling point is embedded in the connecting rod ( 14 ) and/or in part of the piston carrier ( 11 ) by means of the vibration-damping bearing receptacle ( 21 ).