Patent ID: 6799767
Filing Date: 2004-10-05
Classification: B23B,B25B,Y10T

Abstract:
A chuck device for chucking an external item, comprising:a base member; at least a first claw member moveable on said base member in a first direction between a first position wherein said claw member engages said external item and a second position wherein said claw member does not engage said external item, a rotatable input member provided in said base member and configured to apply a rotational drive force, a screw shaft member provided in said base member and moveable in a second direction substantially perpendicular to said first direction to apply an axial drive force, a gear mechanism provided in said base member and coupled to said input member and said screw shaft member, wherein the gear mechanism is further configured to receive the rotational drive force from said input member and propel the screw shaft member in said second direction, a conversion mechanism coupled to said screw shaft member and said claw member, wherein the conversion mechanism is further configured to receive said axial drive force and propel said first claw member in said first direction; wherein said gear mechanism further comprises: a worm gear mechanism having a worm gear coupled to said input member and a worm wheel coupled to said worm gear, and a second gear mechanism coupled to said worm wheel and said screw shaft member, the second gear mechanism further configured to move said screw shaft member in said second direction guided by a threaded hole formed in said worm wheel in response to rotation of the worm wheel.