Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1987-03-23
1988-08-09
Wright, Dirk
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74805, F16H 128
Patent
active
047620250
ABSTRACT:
This invention discloses a gear drive for transmitting rotating motions from a first shaft to a second shaft rotatably disposed in line, which comprises a first rotary member including first and second sets of meshing surfaces of two different pitch diameters such as two sets of gear teeth which are rotatably mounted on a first eccentric section included in the first shaft; a second rotary member with a third set of meshing surfaces rotatably mounted on a second eccentric section included in the first shaft in an arrangement diametrically opposite to the first eccentric section, wherein the first and third meshing surfaces engage each other over an arc portion thereof; and a third rotary member with a fourth set of meshing surfaces rotatably mounted on a third eccentric section included in the first shaft in an arrangement diametrically opposite to the first eccentric section, wherein the second and fourth meshing surfaces engage each other over an arc portion thereof. The second rotary member is nonrotatably coupled to a stationary member disposed concentrically about the first shaft by a first coupling that allows a radial shifting motion therebetween, while the third rotary member is nonrotatably coupled to the second shaft by a second coupling that allows a radial shifting motion therebetween.
REFERENCES:
patent: 987430 (1911-03-01), Conant
patent: 2505745 (1950-04-01), Sharpe
patent: 2666345 (1954-01-01), Amberg
patent: 3472097 (1969-10-01), Huska
patent: 4338831 (1982-07-01), Rodaway
patent: 4621543 (1986-11-01), Giabilondo
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