HEADSTOCK OF MACHINE TOOL
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United States of America Patent
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Issued Date -
Mar 12, 2015
app pub date -
Aug 20, 2014
filing date -
Sep 12, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A headstock is formed by a spindle head to which a tool can be attached, a support base, etc. The spindle head is rotated about a central axis (rotation axis) of a cylindrical rotary spindle and indexed to a predetermined attitude by a rotation drive mechanism built in the support base. The headstock includes a braking mechanism that restrains rotation of the rotary spindle by pressing a piston against a brake plate by using an oil pressure. When the braking mechanism is operated, hydraulic force is applied to a braking member of the rotary spindle in the opposite direction to the direction in which the piston is pressed against the brake plate, so that the braking member is pressed against a reference surface provided in the support base.
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