Slide drive of a blank feed device for presses

摘要

The aim is to achieve a low-wear slide drive which is easy to service, has a small overall size and allows large slide travels at high/speeds. The object is distortion-free and simple transmission of the required sequences of motion of the slide by using just one motion transmission element between the cam mechanism and the belt pulley and slip-free running of the belt drive. This is achieved according to the invention by the fact that a rotatable bell crank lever (1) is in operative connection with the cam mechanism (4) via rollers (3) while the end of one arm of the bell crank lever has a toothed segment (5) which drives a pinion (6) of a belt pulley (7), steel belts (8) running in opposite directions and offset relative to one another being arranged on the belt pulley (7) and being connected to a slide (10). By virtue of the constrained movement of the bell crank lever (1) articulated on the driven cam discs, the said lever executes an oscillating rotary motion with the toothed segment (5). This rotary motion is transmitted to the pinion (6) and to the belt pulley (7) connected to the latter. As a result, the steel belts (8) and the slide (10) connected to them have the desired rectilinear reciprocating feed motion imparted to them. <IMAGE>