192 clutches and power-stop control – Clutches – Automatic
Reexamination Certificate
2002-07-17
2003-11-04
Bonck, Rodney H. (Department: 3681)
192 clutches and power-stop control
Clutches
Automatic
C192S113320
Reexamination Certificate
active
06640948
ABSTRACT:
BACKGROUND OF THE INVENTION
a) Field of the Invention
This invention relates to a one-way clutch apparatus useful in an automatic transmission mechanism or the like for an automobile, and especially to a one-way clutch apparatus which makes use of rollers as torque-transmitting members and can stabilize support of the torque-transmitting members and can surely establish a lube oil supply passage.
b) Description of the Related Art
FIG. 8
is a cross-sectional view of a conventional sprag-type one-way clutch
10
, and illustrates an inner ring
2
, an outer ring
3
, an end bearing
45
, a lock plate
46
, a snap ring
47
, sprags
50
, and oilways
25
bored through the inner ring
25
. Such a conventional apparatus develops inconvenience in retaining its strength because the oilways and the sprags undergo sliding contact with each other.
Especially in a roller-type one-way clutch making use of rollers as torque-transmitting members, it was therefore contemplated to provide a flange of a retainer with an oil passage or oil groove such that lube oil would be applied sideward to the rollers. This design is, however, unavoidably accompanied by inconvenience such that precision machining of the flange is difficult and in some instances, the rollers may be caught by the oil groove in an inner wall of the flange.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a one-way clutch apparatus either free of or lessened in the above-described inconvenience of the conventional one-way clutch apparatuses.
The above-described object of the present invention can be achieved by a one-way clutch apparatus provided with a plurality of rollers interposed as torque-transmitting members between an inner ring and an outer ring and a cam surface formed on an outer peripheral wall of the inner ring such that by a combination of the cam surface and the rollers, transmission of rotating force is performed only in one direction between the inner ring and the outer ring, wherein an inner side wall of a flange of a retainer, said flange being arranged alongside said rollers and inner ring, is provided on a radially inner side thereof with an annular recess, and an outer peripheral end wall of the annular recess is located on a radially outer side of the cam surface of the inner ring only at deepest parts of the cam surface to permit supply of lube oil to the rollers through the annular recess of the flange and the deepest parts of the cam surface.
The annular recess can be machined with extreme ease as the annular recess is arranged on the radially inner side of the inner side wall of the flange of the retainer. It is also possible to surely establish a lube oil supply passage while stabilizing support of the torque-transmitting members because the outer peripheral end wall of the annular recess is located on a radially outer side of the cam surface of the inner ring only at the deepest parts of the cam surface.
REFERENCES:
patent: 4782931 (1988-11-01), Lederman
patent: 5029688 (1991-07-01), Hayakawa et al.
patent: 5638936 (1997-06-01), Kinoshita et al.
patent: 5687826 (1997-11-01), Kinoshita et al.
patent: 6044945 (2000-04-01), Muramatsu
patent: 6092636 (2000-07-01), Muramatsu
patent: 6338402 (2002-01-01), Muramatsu et al.
patent: 6530464 (2003-03-01), Ogata et al.
Ando Tomoharu
Shirataki Hirobumi
Bonck Rodney H.
Crowell & Moring LLP
NSK-Warner K.K.
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