Variable displacement swash plate type compressor

Abstract

Provided is a compressor, in which the inclination angle of a swash plate is changed by an actuator, ensuring stability on a product-by-product basis while realizing reduction in size. In the compressor, when pressure in a control pressure chamber increases, a movable body moves toward a flange. At this time, the movable body pulls the opposite end side of a swash plate rearward in a swash plate chamber via first and second pulling arms. A link mechanism permits increase of the inclination angle of the swash plate until reaching a maximum value. When the pressure in the control pressure chamber reaches a required control pressure, a rear wall of the movable body which has moved rearward in the swash plate chamber abuts a front face of the flange. This makes it possible in this compressor to restrict the maximum value of the inclination angle of the swash plate.

1 . A variable displacement swash plate type compressor comprising:
 a housing in which a suction chamber, a discharge chamber, a swash plate chamber, and a cylinder bore are formed;   a drive shaft extending along a drive axis and rotatably supported in the housing;   a swash plate rotatable in the swash plate chamber along with rotation of the drive shaft;   a link mechanism that is provided between the drive shaft and the swash plate and permits change of an inclination angle of the swash plate in a direction perpendicular to the drive axis of the drive shaft;   a piston reciprocally accommodated in the cylinder bore; a conversion mechanism that reciprocates the piston in the cylinder bore along with rotation of the swash plate at a stroke corresponding to the inclination angle; an actuator capable of changing the inclination angle; and   a control mechanism that controls the actuator, wherein   the suction chamber and the swash plate chamber communicate with each other,   the actuator includes a partition body provided on the drive shaft, a movable body that is movable along the drive axis of the drive shaft in the swash plate chamber and provided with a coupling portion to be coupled to the swash plate, and a control pressure chamber that is defined by the partition body and the movable body and moves the movable body by introducing a refrigerant from the discharge chamber, and   a maximum inclination restriction member that rotates synchronously with the drive shaft and restricts a maximum value of the inclination angle by abutting the movable body is provided on the drive shaft.   
     
     
         2 . The variable displacement swash plate type compressor according to  claim 1 , wherein:
 the drive shaft includes a drive shaft body and a cap that is press-fitted to the drive shaft body and located in the swash plate chamber; and   the cap is the maximum inclination restriction member.   
     
     
         3 . The variable displacement swash plate type compressor according to  claim 1 , wherein:
 the compressor further comprises a circlip that is fitted to the drive shaft and located in the swash plate chamber; and   the circlip is the maximum inclination restriction member.