BALL SCRW CAPABLE OF SENSING PARALLELISM IN REAL TIME
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United States of America Patent
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Issued Date -
Apr 9, 2015
app pub date -
Oct 7, 2013
filing date -
Oct 7, 2013
priority date (Note) -
Abandoned
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Abstract
A ball screw is formed of a screw rod, two screw nuts, a link, a plurality of balls, and at least two parallelism sensors. The screw nuts are sleeved onto the screw rod and are connected with each other via a link to define a spiral path therebetween. The spiral path is linked with an internal circulatory passage of each screw nut for receiving a plurality of balls. The two parallelism sensors are oppositely mounted between the two screw nuts and surround the screw rod for sensing the preload between the two screw nuts to figure out whether the parallelism of the screw rod after the assembly is deviated or not. In this way, monitoring the voltage value outputted from the parallelism sensors can monitor the parallelism of the screw rod in real time after the assembly.
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