US 6,283,722 B1Granted

Variable displacement type compressor

AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho

InventorsKenji Takenaka, Hiroaki Kayukawa, Tetsuhiko Fukanuma, Masahiro Kawaguchi, Hideki Mizutani, Suguru Hirota, Hiroyuki Nakaima

Life of this patent

Estimating the term…

patentgrep

Loading patent…

Abstract

A variable displacement type swash plate compressor that prevents a drive shaft from moving axially when the difference between a crank chamber pressure and a cylinder bore pressure becomes excessive. A hinge mechanism has a support arm extending from a lug plate and a guide pin extends from a swash plate. The head portion of the guide pin fits in a guide hole formed in the support arm. A cutaway surface is formed in a part of the support arm that defines the guide hole. The cutaway surface forms a clearance in the hinge. The clearance permits the swash plate to move without pulling the drive shaft.

Claims16

Dependent claims

A variable displacement type compressor comprising:

a crank chamber;
a drive shaft rotatably supported in the crank chamber;
pistons for performing a compressing operation;
a cam plate, located in the crank chamber and coupled to the pistons for converting rotation of drive shaft to a reciprocal motion of the pistons, the stroke of which depends on the inclination angle of said cam plate, which varies according to the pressure in said crank chamber;
and
a coupling mechanism for coupling the cam plate to the drive shaft, the coupling mechanism including:
a rotary support that rotates integrally with the drive shaft;
a first engaging surface provided on the rotary support;
and
a second engaging surface provided on the cam plate, wherein the first engaging surface and the second engaging surface engage and couple the cam plate to the rotary support to permit said inclination of the cam plate with respect to said drive shaft, wherein at least one of the first engaging surface and the second engaging surface has a predetermined shape that causes the first engaging surface to separate and disengage from the second engaging surface when the inclination angle of said cam plate is at or near a minimum.

7 more elements

A variable displacement type compressor comprising:

a crank chamber;
a drive shaft rotatably supported in the crank chamber;
pistons for performing a compressing operation;
a cam plate, located in the crank chamber and coupled to the pistons for converting rotation of drive shaft to a reciprocal motion of the pistons, the stroke of which depends on the inclination angle of said cam plate, which varies according to the pressure in said crank chamber;
and
a coupling mechanism for coupling the cam plate to the drive shaft so that the cam plate rotates integrally with the drive shaft and the angle of said cam plate varies with respect to the drive shaft, the coupling mechanism including:
a lug plate that rotates integrally with the drive shaft;
a support arm provided on said lug plate, the support arm having a cylindrical guide hole;
a guide pin provided on said cam plate, the guide pin having a spherical head that fits in the guide hole;
and
a cutaway surface formed to adjoin an inner surface of said guide hole at a location where the head of the guide pin is located when the inclination angle of said cam plate is minimized, the cutaway surface being opposite to the lug plate with respect to the head.

8 more elements

Dependencies are inferred from the claim text.