Driving mechanism for tool slides of punching and bending machines

Claim 1

An improved driving mechanism for reciprocating tool slides of automatic punching and bending machines comprising: (a) a hermetically sealed, oil-filled housing, fastened on a frame; (b) a driving shaft sealingly extending through and journalled in a wall of the housing, (c) a pair of cam plates fixed on the driving shaft within the housing, the cams thereof being in 180° offset position with respect to one another; (d) a push rod sealingly extending through a bore provided in a second wall of the housing; (e) a tie rod arrangement arranged in parallel relationship with the push rod within the housing and comprising a slide member and a tie rod connected therewith, the slide member sealingly extending through a second bore provided in said second wall of the housing; (f) the push rod and the slide member being fastened to a tool slide slidably quided on the frame outside of the housing; (g) the tie rod extending beyond the axis of the driving shaft; (h) a cam follower adjustably fastened at the tie rod; (i) the inner end of the push rod provided with a convex end face; and (j) each of the cam follower of the tie rod arrangement and the push rod being held in contact with different cam plates.