Ball screw device
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United States of America Patent
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-
Aug 16, 2016
Grant Date -
Sep 18, 2014
app pub date -
Mar 12, 2014
filing date -
Mar 12, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A ball screw device includes a cylinder that surrounds the outer periphery of a ball nut. Accommodation holes are formed in the ball nut at a rolling start position and a rolling end position in ball rolling paths. An outer periphery turning groove is formed in an outer peripheral face of the ball nut, and the outer periphery turning groove and an inner peripheral face of the cylinder constitute a turning rolling path. The turning rolling path and connection passages formed in deflectors constitute a circulation path through which balls are returned from the rolling end position to the rolling start position.
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