B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
29/26
B23B 31/00 (2006.01) B23B 31/26 (2006.01) B23Q 3/00 (2006.01)
Patent
CA 1049766
A B S T R A C T There is disclosed a tool changer apparatus for holding a tool holder formed on one extremity with a frustoconical male taper, an elongated hollow spindle housing formed at one extremity with a socket defining a female taper flaring radially outwardly toward said one end and projecting axially therefrom to form a second end, a draw bar received telescopically in the spindle housing, mounting a hollow closer on one end adjacent the female taper and having telescoped therethrough a gripper operable upon axial shifting in the direction opposite said one end to grip the holder and upon further axial shifting in that direction to engage the male taper with the female taper to center the tool holder in the socket, the apparatus is character- ized by an actuator mounted on the apparatus proximate the second end and including a radially inwardly facing actuating surface. An elongated locking toggle link is interposed be- tween the second end of the spindle and the draw bar and includes a pair of longitudinal toggle links pivotally connected on their remote ends from the second end of the spindle and the draw bar respectively and further being pivotally connected together on their proximate ends and being pivotable about such remote ends from a collapsed release position with the proximate ends disposed radially outwardly from alignment between the remote ends to a locked, tightening position with the proximate ends passing a position of alignment between said remote ends to draw the draw bar toward said one end relative to said spindle housing. One of the proximate ends being further formed with a radially outwardly facing cam surface for engaging the actuating surface upon relative longitudinal movement between the actuator and toggle link means to urge the toggle link to the locked position. Release means is mounted on the apparatus proximate the second end of the spindle and includes an axial release bore formed in the draw bar, a release pin telescopable axially in the bore and pusher means engagable between one end of the pin and the proximate ends of the links. The pin being operative upon axial shifting in one direction thereof in the bore to engage the pusher means and pivot the proximate ends of the link means radially outwardly to the releasing position to extend the draw bar to disengage the gripper means from the closer, allowing the gripper means to open thereby releasing the tool holder.
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