Transmission gearing
AssigneeMatsushita Electric Works, Ltd.
InventorYoji Kawamoto
Life of this patent
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Abstract
A transmission gearing in which an eccentric cam includes first and second eccentric cam parts and a cam follower has contact faces abutting these eccentric cam parts so that, when a driving source rotates either in normal or reverse direction, the gearing provides as an output one of two different directional motions at the cam follower, with either one of the first and second eccentric cam parts positioned concentric with their pivot shaft without shifting the cam itself in diametral direction in gearing casing. The gearing arrangement is thereby simplified and minimized in required mounting space so as to realize a high compactness of the gearing.
Claims15
A transmission gearing comprising:
- a reversible driving source,
- eccentric cam means including first and second cam parts driven in rotation by said driving source for selectively generating either of first and second differently directed motions,
- pivot shaft means for rotatably supporting said cam means,
- a cam follower having first and second contact faces abutting said first and second cam parts, respectively,
- positioning means interposed between said driving source and said cam means for positioning said cam means in a first orientation wherein one of said cam parts is concentric with said pivot shaft means and the other of said cam parts is eccentric with said pivot shaft means in a normal directional rotation of said cam means, and for positioning said cam means in a second orientation wherein said one cam part is eccentric with said pivot shaft means and said other cam part is concentric with said pivot shaft means in a reverse directional rotation of said cam means as driven by said reversible driving source, and
- means coupled to said cam follower for providing one of said first and second differently directed motions as an output obtained through the one of said contact faces which abuts the cam part positioned eccentric to the pivot shaft means.
Dependencies are inferred from the claim text.