Machine element or mechanism – Mechanical movements – Rotary to intermittent unidirectional motion
Patent
1987-07-28
1988-07-12
Herrmann, Allan D.
Machine element or mechanism
Mechanical movements
Rotary to intermittent unidirectional motion
74393, 74437, 74640, F16H 2704, F16H 3502
Patent
active
047562030
ABSTRACT:
An intermittent drive mechanism includes a pair of non-circular drive and driven gears for translating a constant velocity rotary motion of an input shaft into a non-uniform velocity rotary motion of an intermediate shaft, the latter-mentioned rotary motion having a sinusoidal angular speed pattern, and a harmonic speed reducer drivingly connecting the intermediate shaft to an output shaft which is connected to a flexible spline of the speed reduce. A rigid circular spline of the speed reducer is angularly reciprocated under the control of an eccentric cam on the input shaft in such a manner that the motion of the sinusoidal angular speed pattern is transmitted from the intermediate shaft to the output shaft in a certain decelerated condition only while the intermediate shaft turns through a half of each turn. The motion transmission takes place gently without causing undesired shock at the beginning and the end of the motion.
REFERENCES:
patent: 1449845 (1923-03-01), Taylor
patent: 2700285 (1955-01-01), Bellini
patent: 2861635 (1958-11-01), Orr
patent: 3424021 (1969-01-01), Freudenstein
patent: 3435790 (1969-04-01), Hale
patent: 3613470 (1971-10-01), Arakawa
patent: 4012964 (1977-03-01), Lee
Herrmann Allan D.
Yoshida Kogyo K. K.
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