INVERSION MECHANISM HAVING EXTREMELY WIDE KINETIC CAPACITY

摘要

A mechanism which can produce, with a constant speed rotary input member, a reciprocating motion capable of producing very long dwells at each end of the stroke of the reciprocating motion, unequally long dwells at opposite ends of a stroke, and/or momentary stops intermediate the ends of the stroke, includes the combination of a unidirectional rotary drive means (30) having a cyclically varying output and a reciprocating output drive system (66, 70). The rotary drive means comprises an output shaft (52) mounted for rotation in a frame,an output gear (50) mounted on the shaft (52), a first rotating pair including a first eccentric member 34 mounted eccentrically, in non-rotational relation to, and on a first rotating member 36, and a second rotating pair mounted in fixed spatial relationship with the first rotating pair and including: a second eccentric member (48) mounted eccentrically in non-rotational relation to, and on a second rotating member 40. The first rotating pair and said second rotating pair are connected for rotation with substantially integral angular velocity ratio. The output member (50) and second eccentric member (48) are connected in a driving relationship, and a power means is connected to one of the two rotating pairs to impart a rotary motion thereto. The reciprocating output drive system comprises a crank member (66) mounted at its one end to the output shaft (52), a connecting rod (70) journalled at its one end to the other end of the crank member (66), and a reciprocating output means pivotally connected to the other end of the connecting rod. IMAGE