A mechanism for producing cyclic, of recurring bewegungsablaeufe

摘要

An epicycloidal crank drive mechanism is disclosed as comprising a support frame mounting a prime mover coupled through a gear reducer to drive a primary rotary member about a first fixed axis on which a sun gear is concentrically disposed. The primary rotary member carries at least one roller gear that is engaged by the sun gear such that the roller gear rotates about a second axis which is parallel to the fixed first axis and movable with respect to said first axis as the primary rotary gear is driven by the prime mover. The roller gear has an upper portion on which is mounted a roller adapted to movably engage a slotted section formed in a plate member. The plate member is driven by the roller for rotation about the first fixed axis. The plate member carries a crank arm which moves through a motion that varies relative to the velocity of the primary rotary member. The mechanism is disclosed as an integral part of two types of crank mechanisms. In the first embodiment the crank mechanism functions to actuate a rack for the purpose of positioning locating pins in a transfer mechanism, while in the second embodiment the crank mechanism functions to actuate a transfer bar elevating mechanism.