Electrically-operated chuck opening-closing device
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United States of America Patent
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Jan 19, 2010
Grant Date -
Mar 27, 2008
app pub date -
Sep 6, 2007
filing date -
Sep 27, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
An electrically-operated chuck opening-closing device includes a chuck that grasps workpiece, a conversion device with a control gear provided to the outer circumference, a drawbar that couples the conversion device and the chuck, a transmission gear provided to a main spindle, a second rotary shaft rotatably pivoted to be parallel to the main spindle, a first gear and a second gear rotatably provided on the second rotary shaft, an auxiliary motor that drives the first gear, a first clutch that can couple and decouple the auxiliary motor and the second rotary shaft, and a second clutch that can couple and decouple the second rotary shaft and the second gear.
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