| 摘要 |
A power drawbolt assembly for releasably clamping a tool in the socket of a machine tool spindle. The assembly includes a drawbolt that is biased in a rearward direction relative to the spindle and in an opposite forward direction relative to a concentrically mounted drive sleeve whereby the drawbolt is readily accessible for engaging a tool automatically inserted into the spindle socket and is resiliently supported to absorb excessive axial forces that may be imparted to the drawbolt. A separate ejector tube mounted concentrically on the drawbolt is adapted to be forwardly moved relative to the spindle and drawbolt to strike and positively release a tool adaptor from seating engagement with the spindle socket after the drawbolt has completely unthreaded from the tool adaptor. The operation of the drawbolt and ejector tube are synchronized by an actuating mechanism driven from a single motor. |
