Variable displacement swash-plate compressor

A variable displacement swash-plate compressor comprising:

• a housing, in which a swash plate chamber and a cylinder bore are defined;
• a drive shaft rotationally supported by the housing;
• a swash plate rotational in the swash plate chamber by rotation of the drive shaft;
• a link mechanism arranged between the drive shaft and the swash plate, wherein the link mechanism allows change of an inclination angle of the swash plate with respect to a direction perpendicular to an axis of the drive shaft;
• a piston reciprocally received in the cylinder bore;
• a conversion mechanism, which causes the piston to reciprocate in the cylinder bore by a stroke corresponding to the inclination angle of the swash plate through rotation of the swash plate;
• an actuator configured to change the inclination angle of the swash plate;
• and
• a control mechanism, which controls the actuator,
• wherein
• the link mechanism includes
• a lug member, which is located in the swash plate chamber and is fixed to the drive shaft, and
• a transmitting member, which transmits rotation of the lug member to the swash plate,
• the actuator includes
• the lug member,
• a movable body, which is rotational integrally with the swash plate, wherein the movable body is configured to change the inclination angle of the swash plate by moving along the axis of the drive shaft, and
• a control pressure chamber, which is defined by the lug member and the movable body, wherein the movable body is moved by changing a pressure in the control pressure chamber,
• the movable body has a primary acting portion and a secondary acting portion, which are configured to push the swash plate with the pressure in the control pressure chamber,
• the swash plate has a primary receiving portion and a secondary receiving portion, which are pushed by the primary acting portion and the secondary acting portion,
• a top dead center associated part for positioning the piston at a top dead center and a bottom dead center associated part for positioning the piston at the bottom dead center are defined on the swash plate,
• the primary acting portion is configured to contact the primary receiving portion to push the swash plate when the inclination angle of the swash plate is maximized,
• the secondary acting portion is configured to contact the secondary receiving portion to push the swash plate when the inclination angle of the swash plate is minimized, and
• the secondary acting portion is located between the primary acting portion and the bottom dead center associated part.