Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1987-09-22
1989-08-15
Diehl, Dwight G.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
403356, 464 32, F16H 128, F16D 900
Patent
active
048563790
ABSTRACT:
A non-jamming rotary mechanical actuator for aircraft control surfaces includes a pair of fixed ring gears separated by a moving ring gear. An end plate having a central bore therethrough and a bearing member for rotatably supporting a shaft is mounted at each outer side of said pair of fixed ring gears. Each ring gear has an internal gear surface. The shaft includes an integral inner cam member having a first offset and an outer cam member having a second offset. In driving relationship with said outer cam member is a compound gear having three sets of gear teeth for intermittent contact with said internal gear surfaces of the three ring gears. When a shear member located between the two cam members is broken due to torque overload, the cam members rotate relative to each other so that the compound gear loses contact with the ring gears, thus preventing jamming.
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Abel David B.
Allied-Signal Inc.
Diehl Dwight G.
Macris Harold F.
Muetterties J. Henry
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