Double tapered roller of scroll thrust bearing
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United States of America Patent
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Sep 16, 2003
Grant Date -
N/A
app pub date -
Jan 4, 2001
filing date -
Jul 24, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In double tapered rollers of a thrust scroll bearing, a structure free from generation of edge load at both ends of a section straight line on conical or tapered surfaces, and appropriate in contact stress with the bearing race is presented. To be used as a rolling element of thrust bearing interposed between positions making relative scroll motions, it is a conical body having a pair of conical surfaces (Ra, Rb) matched coaxially and coupled at bottoms mutually, and the entire surface of the conical surfaces (Ra, Rb) is processed by crowning. As a result, edge load is not generated at both ends of the section straight line of the conical surfaces (Ra, Rb), and the maximum contact stress at the apex side is held at a low value within an allowable range.
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