Variable displacement swash-plate compressor

Patent metadata

Field	Value
Publication number	US-9816498-B2
Application number	US-201414778792-A
Country	US
Kind code	B2
Filing date	Mar 26, 2014
Priority date	Mar 29, 2013
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A variable displacement swash plate type compressor includes a rotary shaft, a swash plate, and an actuator, which changes the inclination angle of the swash plate. The actuator includes a partition body and a movable body, which moves in a direction along the rotational axis of the rotary shaft. The movable body includes a guide surface, which changes the inclination angle of the swash plate, and a sliding portion, which slides on the rotary shaft or on the partition body. When viewed from a direction that is perpendicular to the direction in which the rotational axis of the rotary shaft extends and perpendicular to a first direction, the guide surface is configured such that a perpendicular line or a normal line to the guide surface intersects with the rotational axis of the rotary shaft in a zone surrounded by the sliding portion.

First claim

What is claimed is:

1. A variable displacement swash plate type compressor comprising:
a housing, which has a suction chamber, a discharge chamber, a swash plate chamber communicating with the suction chamber, and a cylinder bore;
a rotary shaft, which is rotationally supported by the housing;
a swash plate, which is rotational in the swash plate chamber by rotation of the rotary shaft;
a link mechanism arranged between the rotary shaft and the swash plate, wherein the link mechanism allows for a change of an inclination angle of the swash plate with respect to a first direction that is perpendicular to a rotational axis of the rotary 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, which is located in the swash plate chamber and changes the inclination angle of the swash plate; and
a control mechanism, which controls the actuator, wherein
the actuator includes
a partition body provided on the rotary shaft,
a movable body, which is located in the swash plate chamber and movable along the rotational axis of the rotary shaft,
a control pressure chamber, which is defined by the partition body and the movable body, the movable body is configured to move by at least one of introducing a refrigerant from the discharge chamber to the control pressure chamber and by discharging the refrigerant from the control pressure chamber to the suction chamber, and
a coupling member, which is located between the movable body and the swash plate and in a peripheral portion of the swash plate,

the movable body includes
a guide surface, which guides the coupling member and changes the inclination angle of the swash plate as the movable body moves along the rotational axis of the rotary shaft, and
a sliding portion, which slides on the rotary shaft or the partition body as the movable body moves along the rotational axis of the rotary shaft, and

the guide surface is configured such that a perpendicular line or a normal line to the guide surface and the rotational axis of the rotary shaft intersect with each other in a zone surrounded by the sliding portion when viewed in a direction that is perpendicular to a direction in which the rotational axis of the rotary shaft extends and perpendicular to the first direction.

2. The variable displacement swash plate type compressor according to claim 1 , wherein the guide surface is configured such that, when the inclination angle of the swash plate is a maximum inclination angle, the perpendicular line or the normal line to the guide surface and the rotational axis of the rotary shaft intersect with each other in the zone surrounded by the sliding portion when viewed in the direction that is perpendicular to the direction in which the rotational axis of the rotary shaft extends and perpendicular to the first direction.

3. The variable displacement swash plate type compressor according to claim 1 , wherein the guide surface is configured such that, when the inclination angle of the swash plate is between a minimum inclination angle and a maximum inclination angle, the perpendicular line or the normal line to the guide surface and the rotational axis of the rotary shaft intersect with each other in the zone surrounded by the sliding portion when viewed in the direction that is perpendicular to the direction in which the rotational axis of the rotary shaft extends and perpendicular to the first direction.

4. The variable displacement swash plate type compressor according to claim 1 , wherein the guide surface is configured such that, when the inclination angle of the swash plate is a minimum inclination angle, the perpendicular line or the normal line to the guide surface and the rotational axis of the rotary shaft intersect with each other in the zone surrounded by the sliding portion when viewed in the direction that is perpendicular to the direction in which the rotational axis of the rotary shaft extends and perpendicular to the first direction.

5. The variable displacement swash plate type compressor according to claim 1 , wherein
the guide surface includes a flat section, and
the flat section is configured such that the perpendicular line to the guide surface and the rotational axis of the rotary shaft intersect with each other in the zone surrounded by the sliding portion when viewed in the direction that is perpendicular to the direction in which the rotational axis of the rotary shaft extends and perpendicular to the first direction.

6. The variable displacement swash plate type compressor according to claim 5 , wherein a gradient of the flat section is set such that the perpendicular line to the guide surface and the rotational axis of the rotary shaft intersect with each other in the zone surrounded by the sliding portion.

7. The variable displacement swash plate type compressor according to claim 1 , wherein
the guide surface includes a curved section, and
the curved section is configured such that the normal line to the guide surface and the rotational axis of the rotary shaft intersect with each other in the zone surrounded by the sliding portion when viewed in the direction that is perpendicular to the direction in which the rotational axis of the rotary shaft extends and perpendicular to the first direction.

Assignees

• Toyota Jidoshokki Kk

Inventors

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

Classifications

• F04B27/1054

  Actuating elements · CPC title

• F04B27/1045 Primary

  Cylinders · CPC title

• F04B27/1081

  Casings, housings · CPC title

• F04B27/086

  swash plate · CPC title

• F04B27/1072

  Pivot mechanisms · CPC title