| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce size and weight of a compressor and increase the strength of a neck portion of a piston. SOLUTION: This single-headed piston 14 of a swash plate type compressor is provided with a hollow head portion 76, a pair of engaging portions 70, 72 engaged with a swash plate 50, and a neck portion 74 coupling the engaging portions 70, 72 on the outer peripheral side of the4 swash plate 50. The engaging portions 70, 72 slidably sandwich the outer periphery portion of the swash plate 50 from both sides through a pair of hemispherical shoes 78. On surfaces opposite to each other of the engaging portions 70, 72, concave portions 140 are provided, which slidably holds the shoes 78 at a convex spherical surface 144 thereof. These concave portions 140 have a common spherical center, the spherical center passing a center axis line of the head portion 76, locating on a plane parallel to an extending direction of the engaging portion 70, 72, and having eccentricity to the opposite side to the head portion 74 (an inner periphery side of the compressor) from the center axis line of the head portion 76. The amount of eccentricity is preferably not less than 1/30 of the diameter of the head portion 76. The thickness of the head portion 74 can be increased, and the bending strength of the head portion 74 is improved. By decreasing the diameter of the swash plate 50, the compressor can be reduced in weight and improved in durability.</p> |
