Patent ID: 8549940

Claim:
A drive system for driving a slide of a forming press, comprising a crank mechanism including at least one first crank wheel and at least one second crank wheel, at least one connecting rod operatively connected to each respective crank wheel and each connecting rod having a distal end connected to and forming a pressure point at the slide, one or more servo-motors operatively connected to the crank mechanism, a retention device and a device for torque isolation, and a first pinion shaft mechanically linked to the at least one first crank wheel on the one hand and to the at least one second crank wheel on the other hand via at least one intermediate gear, wherein the retention device and the device for torque isolation are linked to the at least one servo-motor and the mechanical link of the first pinion shaft to the crank wheels is direct engagement and the first pinion shaft is controlled directly by at least one of the servo-motors or the mechanical link of the first pinion shaft to the crank wheels comprises a second pinion shaft directly controlled by at least one of the servo-motors and a gear transmission wheel through which the first pinion shaft is driven indirectly and the mechanical link of the crank wheels comprises an intermediate gear and the first pinion shaft or the gear transmission wheel mechanically links at least one first or second pinion shaft directly controlled by at least one of the servo-motors to at least one first or second pinion shaft not directly controlled by at least one of the servo-motors.