Bearings – Rotary bearing – Antifriction bearing
Reexamination Certificate
2001-09-19
2003-04-29
Bucci, David A. (Department: 3682)
Bearings
Rotary bearing
Antifriction bearing
C384S560000, C417S310000, C418S055100
Reexamination Certificate
active
06554481
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
2. Description of Related Art
Rotation bearings are used to facilitate rotation of components of the compressor. As shown in
FIG. 3
, a known rotation bearing
17
is mounted in the part having a bearing press fitting hole
191
. Bearing press fitting hole
191
that retains and mounts rotation bearing
17
generally may be press fitted into by the rotation bearing
17
from one side (from right side in the figure). Bearing press fitting hole
191
may have an open side to receive rotation bearing
17
and a closed side. Therefore, rotation bearing
17
may be stopped at its closed side in the bearing press fitting hole
191
.
As shown in
FIG. 3
, bearing press fitting hole
191
has smooth sidewalls and a substantially rectangular, cross-sectional shape, and its inner diameter a
3
is symmetric in its cross-sectional view. Inner diameter a
3
is generally designed to be slightly smaller than outer diameter c
3
of rotation bearing
17
. If rotation bearing
17
is pressed into bearing press fitting hole
191
, it may be pressed into only one side of hole
191
. The inner side of hole
191
is open. Because the open side of hole
191
is less rigid than the closed side of hole
191
, the open side is more flexible than the closed inner side of hole
191
. Therefore, rotation bearing
17
occasionally can not be fixed securely into one side of hole
191
, and as a result, rotation bearing
17
twists with respect to the axis of hole
191
and lodge at an angle with respect to the drive shaft of the compressor in hole
191
. Consequently, only a portion of rotation bearing
17
is supported by hole
191
, and the durability of rotation baring
17
and the shaft is reduced.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a securing structure for a compressor bearing, which improves the durability of the rotation bearing and the drive shaft.
In an embodiment of the invention, a compressor bearing assembly for use in a compressor, such as a scroll compressor, a slant plate compressor, or the like, comprises an anti-friction rotation bearing and a compressor component. The anti-friction rotation bearing has a first and a second side. The compressor component has a bearing press fitting hole formed therein and is adapted to receive the first side of the rotation bearing. For example, the compressor component may be a compressor housing. The bearing press fitting hole has a first inner diameter, generally at its mouth, and a second inner diameter, generally at its bottom, such that the first inner diameter is less than the second inner diameter.
In another embodiment, a compressor bearing assembly for use in a compressor, such as a scroll compressor, a slant plate compressor, or the like, comprises an anti-friction rotation bearing and a compressor component. The anti-friction rotation bearing has a first and a second side. The compressor component has a bearing press fitting opening formed therein. The opening has an open end and a closed bottom surface and is adapted to receive a first side of the rotation bearing. The bearing press fitting opening has a first inner diameter, generally at its mouth, and a second inner diameter, generally at its bottom. The first inner diameter is less than said second inner diameter.
In still another embodiment, a compressor bearing assembly for use in a compressor, such as a scroll compressor, a slant plate compressor, or the like, comprises an anti-friction rotation bearing and a compressor component. The anti-friction rotation bearing has a first and a second side. The compressor component has a bearing press fitting hole formed therein and is adapted to receive a first side of the rotation bearing. The bearing press fitting hole has a hole sidewall with a first inner diameter, generally at its mouth, and a second inner diameter, generally at its bottom, such that the first inner diameter is less than the second inner diameter. The sidewall is deformable, such that the first inner diameter is substantially equal to the second inner diameter when the rotation bearing is fixedly pressed into the hole.
In yet another embodiment, a compressor bearing assembly for use in a compressor, such as a scroll compressor, a slant plate compressor, or the like, comprises an anti-friction rotation bearing and a compressor component. The anti-friction rotation bearing has a first and a second side. The compressor component has a bearing press fitting opening formed therein. The opening has an open end, a closed bottom surface, and a opening sidewall and is adapted to receive a first side of the rotation bearing. The opening sidewall has a first inner diameter, generally at its mouth, and a second inner diameter, generally at its bottom. The first inner diameter is less than said second inner diameter. The sidewall is deformable, such that the first inner diameter becomes substantially equal to said second inner diameter when the rotation bearing is fixedly pressed into the opening.
The structure for the compressor bearing in this invention may strongly and uniformly fix the rotation bearing. Further, this structure prevents the rotation bearing from slanting and prevents undesirable adherence between the rotation bearing and the press fitting hole. As a result, the durability of the rotation bearing and the shaft are improved.
Further objects, features, and advantages of this invention will be understood from the following detailed description of preferred embodiments when read in conjunction with the accompanying drawings.
REFERENCES:
patent: 4042309 (1977-08-01), Hiraga
patent: 4353607 (1982-10-01), Sturniolo
patent: 4869651 (1989-09-01), Shimizu et al.
patent: 4940395 (1990-07-01), Yamamoto
patent: 5110273 (1992-05-01), Nishida et al.
patent: 5286117 (1994-02-01), Wojan et al.
patent: 5700094 (1997-12-01), Dam et al.
patent: 6116876 (2000-09-01), Kitano et al.
patent: 6179591 (2001-01-01), Clendenin et al.
patent: 6273616 (2001-08-01), Pflug
Bucci David A.
Hansen Colby
Sanden Corporation
LandOfFree
Compressor bearings does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compressor bearings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compressor bearings will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3078188