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Positively Driven Cam Follower Arrangement

IP.com Disclosure Number: IPCOM000096337D
Original Publication Date: 1963-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Jackowski, CS: AUTHOR

Abstract

Positive operation of an oscillatory cam follower by a single disc cam is obtained. This is by the use of an auxiliary follower acting upon the primary follower during the restore motion of the latter.

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Positively Driven Cam Follower Arrangement

Positive operation of an oscillatory cam follower by a single disc cam is obtained. This is by the use of an auxiliary follower acting upon the primary follower during the restore motion of the latter.

In each of the two cam arrangements, a positively advanced and restored primary follower A, of effective length L, is connected to an auxiliary follower B also having the same effective length L. The followers of each pair are pivoted equal distances C from the rotational center O of the cam. By proper connection of an auxiliary follower 8 with its corresponding primary follower A, positive restore motion is provided which is identical to, or closely approximate, the advance motion.

In drawing 1, follower A is connected to follower B directly through link E to produce a controlled linkage motion. As follower A moves away from and follower B moves toward cam center O, the total annular movements theta are equal, but the incremental movements are not. How ever, the active and complementary cam profiles are correct for both the advance and restore motions. The amount of incremental variation is generally small and results in correspondingly small modifications of phase angle and of velocity arid acceleration amplitudes of the primary follower A relative to the auxiliary follower
B.

In drawing 2, an extension of follower A directly engages follower B as a sliding pair. When surface S is an arc with point P as a center, this ar...