Electrically driven actuator

Details Electrically driven actuator Electrically driven actuator

1976-03-24

1978-04-25

Wyche, Benjamin W.

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

F16H 2702

Patent

active

040856240

ABSTRACT:
An electrically driven actuator having a rotary output shaft for actuating a valve apparatus is disclosed. An electric motor is employed to rotationally drive a pair of parallel threaded shafts symmetrically disposed with respect to the rotary shaft in a plane extending transversely to the plane of the axis of rotation of the rotary shaft. A transverse arm rotationally fixed to the rotary shaft slidably engages feed nuts carried by the threaded shafts for axial movement therealong upon shaft rotation, and the transverse arm is moved in a pivotal, swinging movement sweeping the axial paths of the feed nuts to provide rotation of the rotary output shaft. The provision of a pair of transverse arms extending from axially spaced positions along the rotary shaft on each side of the plane of the threaded shafts is also disclosed. In a modified actuator structure, the use of a worm wheel rotationally fixed to the rotary shaft and directly engaging the threaded shafts is shown. In addition, an adjustable drive gear operating between the electric motor and one of the threaded shafts enables the angular orientation of the one shaft to be independently adjusted in order to synchronize it with the other threaded shaft.

REFERENCES:
patent: 3572140 (1971-03-01), Gulick
patent: 3640140 (1972-02-01), Gulick

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