Variable capacity compressor

Abstract

A hinge mechanism ( 40 ) of a variable capacity compressor ( 1 ) includes an arm ( 41 ) protruded toward a tilting member ( 24 ) from a rotation member ( 21 ), an arm ( 43 ) protruded toward the rotation member ( 21 ) from the tilting member ( 24 ) to receive a rotational torque from the arm ( 41 ) of the rotation member, a pin ( 51 ) fixed to one of the arm ( 41 ) of the rotation member and the arm ( 43 ) of the tilting member, and an axial-load receiving surface ( 53 a , 53 b ) formed on the other of the arm ( 41 ) of the rotation member and the arm ( 43 ) of the tilting member and configured to be in contact with the pin ( 51 ) so as to receive an axial load produced between the rotation member ( 21 ) and the tilting member ( 24 ). A position where the pin ( 51 ) and the axial-load receiving surface ( 53 a ) contact with each other when the swash plate ( 24 ) has a maximum inclination angle is located within a range of 27 to 90 degrees anterior, in the rotational direction, to a position (TDC) corresponding to the top dead center.

1 . A variable capacity compressor comprising:
 a drive shaft;   a rotation member fixed to the drive shaft to rotate with the drive shaft;   a tilting member attached to the drive shaft such that the tilting member is slidable along the axis of the drive shaft and inclinable with respect to the drive shaft;   a hinge mechanism configured to transmit rotational torque of the rotation member to the tilting member while permitting the inclination of the tilting member to change; and   pistons configured to reciprocate in cylinder bores in accordance with rotation of the tilting member,   the hinge mechanism including:   an arm projected from the rotation member toward the tilting member;   an arm projected from the tilting member toward the rotation member and configured to receive the rotational torque from the arm of the rotation member;   a pin provided at one of the arm of the rotation member and the arm of the tilting member; and   an axial-load receiving surface formed on the other of the arm of the rotation member and the arm of the tilting member and configured to contact with the pin to receive an axial load applied to the rotation member from the tilting member,   wherein a position where the pin and the axial-load receiving surface contact with each other when the inclination angle of the tilting member is maximum is located within a range of 27 to 90 degrees anterior, in the rotational direction R, to a position corresponding to a top dead center.   
     
     
         2 . The variable capacity compressor according to  claim 1 ,
 wherein the position where the pin and the axial-load receiving surface contact with each other when the inclination angle of the tilting member is maximum is located within a range of 27 to 37 degrees anterior, in the rotational direction R, to the position corresponding to the top dead center.   
     
     
         3 . The variable capacity compressor according to  claim 1 , wherein
 the arm of the rotation member is formed in a fork shape with a slit in which the arm of the tilting member is slidably fit in a sandwich manner.   
     
     
         4 . The variable capacity compressor according to  claim 1 , wherein
 the arm of the tilting member is formed in a fork shape with a slit in which the arm of the rotation member is slidably fit in a sandwich manner.   
     
     
         5 . The variable capacity compressor according to  claim 1 , wherein
 the pin is formed of a separated member separated from and fixed to one of the arm of the rotation member and the arm of the tilting member.