Swash plate type variable displacement compressor

Patent metadata

Field	Value
Publication number	US-9309875-B2
Application number	US-201314064632-A
Country	US
Kind code	B2
Filing date	Oct 28, 2013
Priority date	Nov 5, 2012
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

A compressor includes an actuator. The actuator is arranged in a swash plate chamber, while being rotational integrally with a drive shaft. The actuator includes a rotation body, a movable body, and a control pressure chamber. A control mechanism is provided that changes the pressure in the control pressure chamber to move the movable body. The movable body is arranged such that, when the pressure in the control pressure chamber is raised, the movable body pulls the swash plate to increase the inclination angle of the swash plate.

First claim

The invention claimed is:

1. A swash plate type variable displacement 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 rotationally supported by the housing;
a swash plate rotatable in the swash plate chamber by rotation of the drive shaft;
a link mechanism arranged between the drive shaft and the swash plate, the link mechanism allowing change of an inclination angle of the swash plate with respect to a line perpendicular to the rotation 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 capable of changing the inclination angle of the swash plate; and
a control mechanism that controls the actuator, wherein
the actuator is arranged in the swash plate chamber and rotates integrally with the drive shaft,
the actuator includes
a rotation body fixed to the drive shaft,
a movable body, which is coupled to the swash plate and moves along the rotation axis of the drive shaft to be movable relative to the rotation body, and
a control pressure chamber, which is defined by the rotation body and the movable body, wherein the control pressure chamber moves the movable body by an internal pressure of the control pressure chamber,
the control mechanism changes the pressure in the control pressure chamber to move the movable body, and
the movable body is arranged such that, when the pressure in the control pressure chamber is raised, the movable body moves in a direction away from the swash plate so as to pull the swash plate to increase the inclination angle of the swash plate.

2. The swash plate type variable displacement compressor according to claim 1 , wherein
the link mechanism has a lug arm,
the lug arm has a distal end supported by the swash plate to be allowed to pivot about a first pivot axis perpendicular to the rotation axis and a basal end supported by the drive shaft to be allowed to pivot about a second pivot axis parallel to the first pivot axis, and
the swash plate is supported by the movable body so that the swash plate is allowed to pivot about an operation axis parallel to the first pivot axis and the second pivot axis.

3. The swash plate type variable displacement compressor according to claim 2 , wherein
the lug arm includes a weight portion extending at the opposite side to the second pivot axis with respect to the first pivot axis, and
the weight portion rotates about the rotation axis to apply force to the swash plate to decrease the inclination angle.

4. The swash plate type variable displacement compressor according to claim 3 , wherein
the swash plate has a first member that supports the distal end of the lug arm to allow the distal end of the lug arm to pivot about the first pivot axis and is capable of pivoting about the operation axis, and
the first member has a through hole through which the drive shaft is passed.

5. The swash plate type variable displacement compressor according to claim 4 , wherein a second member is fixed to the drive shaft, and the second member supports the basal end of the lug arm to allow the basal end of the lug arm to pivot about the second pivot axis.

6. The swash plate type variable displacement compressor according to claim 3 , wherein the drive shaft is located between the first pivot axis and the second pivot axis.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Yamamoto Shinya
• Suzuki Takahiro
• Honda Kazunari
• Nishii Kei
• Yamazaki Yusuke
• Ota Masaki

Classifications

• F04B27/1072

  Pivot mechanisms · CPC title

• F04B27/1054

  Actuating elements · CPC title

• F04B27/1804 Primary

  Controlled by crankcase pressure · CPC title

• F04B2027/1813

  Crankcase pressure · CPC title

• F04B27/18

  by varying the relative positions of a swash plate and a cylinder block · CPC title