Variable displacement type swash plate compressor

Abstract

A mobile body and a swash plate are coupled to each other via a columnar coupling pin provided on an outer peripheral part of the swash plate. An insertion hole through which the coupling pin is passed is formed in the swash plate. The insertion hole has a guide surface for guiding the coupling pin and for changing the inclination angle of the swash plate following movement of a mobile body to the axial direction of a rotation shaft. The guide surface has a flat surface part which is inclined to a moving direction of the mobile body. The flat surface part is set such that a perpendicular line of the flat surface part and an axial line of the rotation shaft cross in a region surrounded by a sliding part, viewed from a direction orthogonal to both an axial direction of the rotation shaft and a first direction.

1 . A variable displacement type swash plate compressor comprising:
 a housing in which there are formed a suction chamber, a discharge chamber, a swash plate chamber communicated with the suction chamber, and cylinder bores;   a rotation shaft, which is rotationally supported by the housing;   a swash plate, which is rotatable in the swash plate chamber by rotation of the rotation shaft;   a link mechanism, which is provided between the rotation shaft and the swash plate and permits change of an inclination angle of the swash plate to a first direction orthogonal to an axial line of the rotation shaft;   a piston, which is housed to reciprocate in the cylinder bore;   a converting mechanism, which reciprocates, by rotation of the swash plate, the piston in the cylinder bore by a stroke according to the inclination angle of the swash plate;   an actuator, which is located in the swash plate chamber, changes the inclination angle of the swash plate; and   a control mechanism that controls the actuator, wherein   the actuator has   a partitioning body, which is provided in the rotation shaft,   a mobile body, which can move along an axial line of the rotation shaft in the swash plate chamber,   a control pressure chamber, which is partitioned by the partitioning body and the mobile body, moves the mobile body by introducing a refrigerant from the discharge chamber, and   a coupling member, which is provided, between the mobile body and the swash plate, on an outer side in a radial direction from an insertion hole of the swash plate through which the rotation shaft is passed,   the mobile body has a sliding part that slides on the rotation shaft or on the partitioning body following movement along an axial line of the rotation shaft,   the swash plate has a guide surface for guiding the coupling member and for changing the inclination angle of the swash plate following movement of the mobile body along an axial line of the rotation shaft, and   the guide surface is set such that a perpendicular line or a normal line of the guide surface and an axial line of the rotation shaft cross in a region surrounded by the sliding part, viewed from a direction orthogonal to both the axial line of the rotation shaft and the first direction.   
     
     
         2 . The variable displacement type swash plate compressor according to  claim 1 , wherein
 the guide surface is set such that the perpendicular line or the normal line of the guide surface and the axial line of the rotation shaft cross in the region surrounded by the sliding part, viewed from a direction orthogonal to both the axial line of the rotation shaft and the first direction when the inclination angle of the swash plate is a maximum inclination angle.   
     
     
         3 . The variable displacement type swash plate compressor according to  claim 1 , wherein
 the guide surface is set such that the perpendicular line or the normal line of the guide surface and the axial line of the rotation shaft cross in the region surrounded by the sliding part, viewed from a direction orthogonal to both the axial line of the rotation shaft and the first direction when the inclination angle of the swash plate is between a minimum inclination angle and a maximum inclination angle.   
     
     
         4 . The variable displacement type swash plate compressor according to  claim 1 , wherein
 the guide surface is set such that the perpendicular line or the normal line of the guide surface and the axial line of the rotation shaft cross in the region surrounded by the sliding part, viewed from a direction orthogonal to both the axial line of the rotation shaft and the first direction when the inclination angle of the swash plate is a minimum inclination angle.   
     
     
         5 . The variable displacement type swash plate compressor according to  claim 1 , wherein
 the guide surface is set such that the perpendicular line or the normal line of the guide surface and the axial line of the rotation shaft cross in the region surrounded by the sliding part, viewed from a direction orthogonal to both the axial line of the rotation shaft and the first direction in a whole range in which the inclination angle of the swash plate can be changed.   
     
     
         6 . The variable displacement type swash plate compressor according to  claim 1 , wherein
 the guide surface comprises a flat surface part, and   the flat surface part is set such that the perpendicular line of the guide surface and the axial line of the rotation shaft cross in the region surrounded by the sliding part, viewed from the direction orthogonal to both the axial line of the rotation shaft and the first direction.   
     
     
         7 . The variable displacement type swash plate compressor according to  claim 1 , wherein
 the guide surface comprises a curved surface part, and   the curved surface part is set such that the normal line of the guide surface and the axial line of the rotation shaft cross in the region surrounded by the sliding part, viewed from the direction orthogonal to both the axial line of the rotation shaft and the first direction.