Variable displacement swash-plate compressor

A variable displacement swash-plate compressor comprising:

• a housing having a swash plate chamber and a cylinder bore;
• a drive shaft that is rotationally supported by the housing;
• a swash plate that is supported in the swash plate chamber and is rotational by rotation of the drive shaft;
• a link mechanism arranged between the drive shaft and the swash plate, wherein the link mechanism allows an inclination angle of the swash plate to be changed with respect to a direction perpendicular to a drive shaft axis of the drive shaft;
• a piston reciprocally received in the cylinder bore;
• a conversion mechanism that 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;
• and
• a control mechanism that controls the actuator, wherein
• the link mechanism includes
• a lug member that is located in the swash plate chamber and is fixed to the drive shaft, and
• a transmitting member that transmits rotation of the lug member to the swash plate,
• the swash plate has a through hole, which slides on an outer circumference of the drive shaft in response to changes in the inclination angle,
• the swash plate is guided by the link mechanism and the through hole along the drive shaft axis and in a direction of the inclination angle, thereby changing the inclination angle,
• the actuator includes
• the lug member,
• a movable body located between the lug member and the swash plate, wherein the movable body is configured to rotate integrally with the swash plate and to move along the drive shaft axis, thereby changing the inclination angle, and
• a control pressure chamber that is defined by the lug member and the movable body and is configured such that pressure in the control pressure chamber is changed by the control mechanism to move the movable body,
• the movable body includes an acting portion that is configured to push the swash plate with the pressure in the control pressure chamber,
• the swash plate includes a receiving portion that contacts and is pushed by the acting portion,
• the acting portion and the receiving portion contact each other at an acting position,
• a top dead center associated part for positioning the piston at a top dead center is defined on the swash plate, and
• when the drive shaft and the acting position are viewed from a direction that is perpendicular to a top dead center plane containing the top dead center associated part and the drive shaft axis, the acting position is defined at a position overlapping with the drive shaft regardless of the inclination angle.