초록 ▼

The outer diameter Φd1 of a top face-side end portion 35 of pistons 7 is made slightly smaller than the outer diameter Φd0 of a hollow cylindrical portion 36 of the pistons 7 other than the top face-side end portion 35. Thus, the tilt load of a top face-side portion of the piston 7 is divided and di

The outer diameter Φd1 of a top face-side end portion 35 of pistons 7 is made slightly smaller than the outer diameter Φd0 of a hollow cylindrical portion 36 of the pistons 7 other than the top face-side end portion 35. Thus, the tilt load of a top face-side portion of the piston 7 is divided and distributed, and at the same time, lubricating oil is held at the top face-side end portion 35 of the piston 7.

대표청구항 ▼

1. A swash plate refrigerant compressor comprising: a cylinder block having a plurality of cylinder bores formed therein; a drive shaft rotatably supported in a central portion of said cylinder block; pistons slidably inserted in said cylinder bores, respectively, said pistons each having a top

1. A swash plate refrigerant compressor comprising: a cylinder block having a plurality of cylinder bores formed therein; a drive shaft rotatably supported in a central portion of said cylinder block; pistons slidably inserted in said cylinder bores, respectively, said pistons each having a top face-side end portion, and a hollow cylindrical portion other than the top face-side end portion, the top face-side end portion having an outer diameter slightly smaller than an outer diameter of the hollow cylindrical portion; a swash plate for transmitting a driving force to said pistons; and a crankcase in which said swash plate is received. 2. A swash plate refrigerant compressor according to claim 1, wherein inclination of said swash plate varies with pressure within said crankcase to thereby change a stroke length of said pistons. 3. A swash plate refrigerant compressor according to claim 1, wherein the top face-side end portion of said pistons is tapered. 4. A swash plate refrigerant compressor according to claim 1, wherein inclination of said swash plate varies with pressure within said crankcase to thereby change a stroke length of said pistons, and wherein the top face-side end portion of said piston is tapered. 5. A swash plate refrigerant compressor according to claim 1, wherein a lubricating oil groove is circumferentially formed in an outer peripheral surface of the top face-side end portion of said pistons. 6. A swash plate refrigerant compressor according to claim 1, wherein inclination of said swash plate varies with pressure within said crankcase to thereby change a stroke length of said pistons, and wherein a lubricating oil groove is circumferentially formed in an outer peripheral surface of the top face-side end portion of said pistons. 7. A swash plate refrigerant compressor according to claim 1, wherein the top face-side end portion of said pistons is tapered, and wherein a lubricating oil groove is circumferentially formed in an outer peripheral surface of the top face-side end portion of said pistons. 8. A swash plate refrigerant compressor according to claim 1, wherein inclination of said swash plate varies with pressure within said crankcase to thereby change a stroke length of said each of said pistons, wherein the top face-side end portion of said pistons is tapered, and wherein a lubricating oil groove is circumferentially formed in an outer peripheral surface of the top face-side end portion of said piston. 9. A swash plate refrigerant compressor according to claim 1, wherein carbon dioxide is used as a refrigerant. 10. A swash plate refrigerant compressor according to claim 2, wherein carbon dioxide is used as a refrigerant. 11. A swash plate refrigerant compressor according to claim 3, wherein carbon dioxide is used as a refrigerant. 12. A swash plate refrigerant compressor according to claim 4, wherein carbon dioxide is used as a refrigerant.