Variable displacement swash plate type compressor

Abstract

A variable capacity swash plate compressor includes a thrust flange 40 fixed to a shaft 5 and rotating in unison with the shaft 5, a swash plate 10 connected to the thrust flange 40 via a linkage 42 and rotating in unison with the thrust flange 40 according to rotation thereof, a hinge ball 9 slidably mounted on the shaft 5, for limiting an angle of the swash plate 10 with respect to the shaft 5, and a piston 7 connected to the swash plate 10 via shoes 11 relatively rotating on sliding surfaces 10 a , 10 b of the swash plate 10, and performing linear reciprocating motion within a cylinder bore 6 according to rotation of the swash plate 10, wherein the angle of inclination of the swash plate 10 changes according to a change in pressure in a crankcase 8 within which the swash plate 10 is received, to thereby change a length of stroke of the piston 7. In this variable capacity swash plate compressor, the center O 1 of the hinge ball 9 is positioned toward a front side with respect to the center O 2 of a plate portion 10 c of the swash plate 10.

1 . A variable capacity swash plate compressor including: 
 a rotational member fixed to a shaft and rotating in unison with the shaft,    a swash rotational plate connected to said rotational member via a linkage and rotating in unison with said rotational member according to rotation thereof,    an angle-limiting member slidably mounted on the shaft, for limiting an angle of said swash rotational plate with respect to the shaft, and    a piston connected to said swash rotational plate via shoes relatively rotating on sliding surfaces of said swash rotational plate, and performing linear reciprocating motion within a cylinder bore according to rotation of said swash rotational plate,    wherein the angle of inclination of said swash rotational plate changes according to a change in pressure in a crankcase within which said swash rotational plate is received, to thereby change a length of stroke of said piston,    characterized in that: 
 a center of said angle-limiting member is positioned toward a front side with respect to a center of a plate portion of said swash rotational plate.  
   
     
     
         2 . A variable capacity swash plate compressor according to  claim 1 , wherein the center of said angle-limiting member is made coincident with a center of gravity of said swash rotational plate.  
     
     
         3 . A variable capacity swash plate compressor including: 
 a rotational member fixed to a shaft and rotating in unison with the shaft,    a swash rotational plate connected to said rotational member via a linkage and rotating in unison with said rotational member according to rotation thereof,    a shaft insertion central hole formed through said swash rotational plate, and having said shaft extending therethrough, said shaft insertion central hole limiting an angle of said swash rotational plate with respect to the shaft, and    a piston connected to said swash rotational plate via shoes relatively rotating on sliding surfaces of said swash rotational plate, and performing linear reciprocating motion within a cylinder bore according to rotation of said swash rotational plate,    wherein the angle of inclination of said swash rotational plate changes according to a change in pressure in a crankcase within which said swash rotational plate is received, to thereby change a length of stroke of said piston,    characterized in that: 
 a center of a circle formed by an edge line of said shaft insertion central hole is positioned toward a front side with respect to a center of a plate portion of said swash rotational plate.  
   
     
     
         4 . A variable capacity swash plate compressor according to  claim 3 , wherein the center of the circle formed by the edge line of said shaft insertion central hole is made coincident with a center of gravity of said swash rotational plate.