NOCKENGESTEUERTE MEHRSCHRITT-VORSCHUB-VORRICHTUNG

摘要

In apparatus for transferring articles through a series of processing stations, a multistroke feed mechanism is operatively connected to a feed member which reciprocates for causing the transfer of the articles. The multistroke feed mechanism comprises a set of disc cams having lobes of different radii and splined to a camshaft for joint rotation therewith and sliding motion in its axial direction. A cam follower lever is arranged for abutment against any selected one of the disc cams thereby to be oscillated through a corresponding angle. For causing the axial sliding motion of the disc cams over the camshaft, a sleeve is fitted over the camshaft and secured to the cams for axial motion therewith. Formed between the camshaft and the sleeve are a pair of opposed fluid chambers for moving the sleeve to any desired position wherein a selected one of the disc cams is engaged by the cam follower lever. A linkage connects this lever to the feed member so as to translate the oscillation of the lever, through the angle determined by the selected cam, into the reciprocation of the feed member over a corresponding distance.