Swash plate type compressor with improved sliding portions

Abstract

The sliding characteristics of the sliding portions, where components slide on each other, are improved and the work of coating forming thereof is simplified. DLC coatings ( 43 ) and ( 44 ) are formed on a front surface ( 39 ) and a rear surface ( 40 ) of a swash plate ( 22 ) by a CVD method or a PVD method. Therefore, the sliding characteristics of the sliding portion ( 47 ) between the swash plate ( 22 ) and shoes ( 27 ) and ( 28 ) are improved and abrasion or seizure occurs less frequently on the surface of the swash plate ( 22 ) and flat surfaces ( 35 ) and ( 36 ) of the shoes ( 27 ) and ( 28 ).

1 . A swash plate type compressor comprising a swash plate assembled so as to enable a rotational motion together with a drive shaft, at least a pair of shoes connected to the swash plate, and a piston connected to the swash plate via the shoes, wherein 
 an amorphous hard carbon coating is formed on at least one of the sliding portions where components of the compressor slide on each other during the operation of the compressor.    
     
     
         2 . A swash plate type compressor, as set forth in    claim 1   , wherein the amorphous hard carbon coating is formed on at least one of the sliding portions where the swash plate, the shoes, and the piston slide.  
     
     
         3 . A swash plate type compressor, as set forth in    claim 1   , wherein the amorphous hard carbon coating is formed on the sliding surfaces of the swash plate against the shoe.  
     
     
         4 . A swash plate type compressor, as set forth in    claim 1   , wherein the amorphous hard carbon coating is formed on the sliding surfaces of the shoes against the swash plate.  
     
     
         5 . A swash plate type compressor, as set forth in    claim 1   , wherein the amorphous hard carbon coating is formed on the sliding surfaces of the shoes against the piston.  
     
     
         6 . A swash plate type compressor, as set forth in    claim 1   , wherein the amorphous hard carbon coating is formed at least on the sliding surface of an outer surface of the piston against the shoes.  
     
     
         7 . A swash plate type compressor, as set forth in    claim 1   , wherein the amorphous hard carbon coating is formed at least on an outer circumferential surface of the outer surface of the piston.  
     
     
         8 . A swash plate type compressor, as set forth in    claim 1   , wherein the amorphous hard carbon coating is a diamond-like carbon coating.