| 摘要 |
A mechanism for retaining tools in the spindle of a machine tool and for ejecting the tools for removal from the spindle. The mechanism is adapted to operate with standard cutting tool holders having a retention knob extending rearwardly and axially. The tool holder is retained in the spindle by a set of locking pins that extend radially through the spindle in a single plane in position to engage the inner side of the knob. A set of release pins of similar construction extend radially through the spindle in another plane in position to engage the outer side of the knob for ejecting the tool holder from its seat in the spindle. A cylindrical cam is slidably disposed about the spindle for axial movement by pneumatic or hydraulic pressure. When the cylindrical cam is moved in one direction it actuates the locking pins inwardly into locking engagement with the retention knob on the tool holders. A shifting of the cylindrical cam in the opposite direction serves to release the locking pins and actuate the release pins to force them inwardly for engaging the retention knob on its outer side to eject the tool holder and its associated cutter from the spindle.
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