Lathe
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United States of America Patent
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-
Nov 8, 2022
Grant Date -
Sep 17, 2020
app pub date -
May 29, 2020
filing date -
Jan 16, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a lathe capable of elongating the life of a shifter mechanism. A lathe comprises a spindle, a chucking unit, a power transmitting unit, a shifter, a claw, and a driving unit. The shape of an outer circumference of the shifter in a contact range and a first end of the claw in longitudinal section along the spindle axis is such shape as the acceleration “a” of the first end in the diameter direction with respect to the moving distance of the shifter moving in the direction of the spindle axis (Z-axis direction) at a constant speed is continuous both in a positive range and in a negative range where the contact range is a range of the outer circumference of the shifter in contact with the first end of the claw.
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