ELECTRIC PRESS DEVICE

摘要

An electric press device formed in such a structure that a differential key is circumferentially moved in place of such a structure in a publicly known document that a differential key is linearly moved so that a fixed point processing requiring accurate position control can be accurately performed for a long time. A slide plate (5) is vertically moved by a first motor (8) to process a work at a fixed position. A differential mechanism comprises a cylindrical nut lifting sleeve (15) having a spirally advancing sliding groove (21) in the outer peripheral surface thereof, a nut lifting plate (17) having a guiding engagement part (22) fitted to the sliding groove and allowed to slide therein, and a second motor (41) rotating the nut lifting plate (17).