Preload control apparatus for bearings with shape memory alloy springs
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United States of America Patent
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-
Mar 10, 1992
Grant Date -
N/A
app pub date -
Sep 7, 1990
filing date -
Mar 30, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A preload control apparatus for use in a spindle (12) of a machine tool comprises a bearing (16,17) and a plurality of springs (26a to 26d) for exerting a preload on the bearing (16, 17). Some or all of the springs (26a to 26d) are at least partly made of a shape memory alloy so that the preload on the bearing (16,17) can be adjusted with changes in temperature of the springs (26a to 26d).
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