Slide adjusting device for a press

Abstract

A press having a slide adjusting device and which has a press crown, a crank shaft mounted on the crown and having an eccentric portion, a connecting rod mounted on the eccentric portion, a slide adjusting screw connected to the connecting rod, a worm wheel mounted on the outer periphery of the slide adjusting screw for rotating the slide adjusting screw with the worm wheel and for relative axial sliding movement of the slide adjusting screw and the worm wheel, a crown engaging the worm wheel for holding the worm wheel fixed against movement in the vertical direction relative to the press crown, whereby the slide adjusting screw is moved in the rotational direction by rotation of the worm wheel and is slidable in the vertical direction in the worm wheel. A worm shaft is engaged with the worm wheel for rotating the worm wheel, a motor is mounted on the press crown and connected to the worm shaft for driving the worm shaft, a press slide is threadedly engaged by the outer periphery of the slide adjusting screw at the lower end thereof, a piston is vertically movably mounted on the press slide means with the upper portion thereof threaded to the lower end of the slide adjusting screw, the piston and the slide defining an oil pressure chamber therebetween, and a pump is provided for supplying oil under pressure to the oil pressure chamber and includes a control valve for controlling the level of the oil pressure.

Dependencies are inferred from the claim text.