Bearing for swash plate compressor

Details Bearing for swash plate compressor Bearing for swash plate compressor

2000-05-09

2002-09-10

Lopez, F. Daniel (Department: 3745)

Expansible chamber devices

Relatively movable working members

Interconnected with common rotatable shaft

C091S499000

Reexamination Certificate

active

06446540

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a swash plate compressor for air-conditioning vehicles and a radial ball-and-roller bearing for supporting a swash plate.
Japanese Unexamined Patent Publication No. 10-196525 describes a swash plate compressor as shown in
FIG. 5. A
housing
101
includes a crank chamber
102
and cylinder bores
103
. A drive shaft
104
is supported by the housing
101
. A support plate
105
is supported by the drive shaft
104
and rotates integrally with the drive shaft
104
. A cylindrical boss
107
projects from the center of the support plate
105
. A swash plate
106
is supported by the boss
107
through an angular ball bearing
108
. The angular ball bearing
108
permits the swash plate
106
to rotate relative to the support plate
105
. A piston
109
is accommodaed in each cylinder bore
103
. Each piston
109
is coupled to the swash plate
106
through a pair of shoes
110
.
Rotation of the drive shaft
104
is converted into reciprocation of the pistons
109
in the cylinder bores
103
through the support plate
105
, the angular ball bearing
108
, the swash plate
106
, and the shoes
110
.
In another prior art compressor (not shown), a swash plate is coupled to pistons by rods instead of shoes. This type of compressor includes a mechanism for preventing the rotation of the swash plate such that a strong force is not applied to the couplers between the swash plate and the rods and between the pistons and the rods. In contrast, the compressor of
FIG. 5
does not include such mechanism, which simplifies the structure of the compressor. Also, there is no need for forming seats for receiving the rods on the swash plate
106
, which simplifies the shape of the swash plate
106
.
Friction occurs between the swash plate
106
and the shoes
110
. Therefore, the swash plate
106
is hardly rotated by the support plate
105
. This prevents friction caused by sliding motion between the shoes
110
and the swash plate
106
, which extends life of the parts and prevents power transmission loss.
In the compressor of
FIG. 5
, an angular ball bearing
108
is located between the boss
107
and the swash plate
106
. The bearing
108
includes outer and inner races and balls located between the races. This type of bearing is widely used. However, there is a need to simplify the structure of the bearing
108
to reduce manufacturing costs.
SUMMARY OF THE INVENTION
An objective of the present invention is to provide a swash plate compressor having a simple bearing structure.
To achieve the above objective, the present invention provides a compressor. The compressor has a housing. A cylinder bore is formed in the housing. A piston is accommodated in the cylinder bore. A drive shaft is rotatably supported by the housing. A support plate is integrally driven with the drive shaft. The drive shaft extends through the support plate and inclines with respect to the axis of the drive shaft. The support plate has an axially projecting boss. A radial bearing is located about the boss. The radial bearing has an outer race. A disk-like swash plate is formed integrally with the outer race. The swash plate is connected the piston to cause the piston to reciprocate.
Other aspects and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.


REFERENCES:
patent: 2241046 (1941-05-01), Wahlmark
patent: 4867649 (1989-09-01), Kawashima et al.
patent: 4940393 (1990-07-01), Taguchi
patent: 5239913 (1993-08-01), Terauchi
patent: 5555626 (1996-09-01), Fuchs
patent: 5582092 (1996-12-01), Nomura et al.
patent: 6102670 (2000-08-01), Taguchi
patent: 0 280 479 (1988-08-01), None
patent: 0 853 198 (1998-07-01), None
patent: 3-141877 (1991-06-01), None
patent: 5-195950 (1993-08-01), None
patent: 10-159723 (1998-06-01), None
patent: 10-196525 (1998-07-01), None

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