MACHINE VICE Russian patent published in 1997 - IPC

FIELD: mechanical engineering; devices for clamping the parts to be machined. SUBSTANCE: vice has body 1 with guides 4, fixed jaw 2 installed on body, movable jaw 3 installed for movement along guides, hydraulic drive with cylinder 5 secured on fixed jaw and piston with rod 6, lead screw 7 connected with rod by one end to form screw pair for travel along rod and by other end with movable jaw through threaded bushing. Bell crank 9 is installed on threaded bushing 8. One arm of bell crank is connected with body and other arm, with movable jaw. Wedge socket is made on side surface of one of bell crank arms. Self-alignment member 12 is arranged on movable jaw for engagement with inclined surface of wedge socket of bell crank. EFFECT: improved reliability of clamping. 3 cl, 1 dwg