POWER PRESS DRIVE Russian patent published in 2003 - IPC

FIELD: power presses for blanking and stamping parts from sheet materials. SUBSTANCE: power press drive includes drive eccentric shaft connected through eccentric bushings located on cranks of eccentric shaft for force engagement with it and connecting rods with press slide. Eccentric bushings are installed for alternating force engagement with eccentric shaft and connecting rods by means of step keys. Keyways with guides for step keys are made on internal and external surfaces of eccentric bushings, in plane of their symmetry, on side of maximum eccentricity. Keyways are also made on connecting rods internal surface and on diametrically opposite side of eccentric shaft cranks. Keys are located for displacement in installation and for locking in forced or free positions by threaded joints. EFFECT: simplified design of power press drive and reduced cost of equipment. 2 cl, 3 dwg