Bi-directional rotary actuator
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United States of America Patent
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Jul 9, 2013
Grant Date -
Jun 30, 2011
app pub date -
Jun 26, 2009
filing date -
May 13, 2008
priority date (Note) -
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Abstract
A bi-directional rotary actuator causing the output shaft thereof to output two or more kinds of bi-directional and rotational driving forces. A bi-directional rotary actuator includes a rotary solenoid (101) serving as a driving source, a link body (104) engaged with a shaft (132) such that a rotational force can be transmitted to the shaft, an output element (105) connected to the link body, and switching operation means (106) for selecting connection between the link body and the output element. Transmission of a rotational force between the link body and the output element can be appropriately switched to either gear drive performed by meshing of gears or link drive based on a link ratio, and this allows the actuator to output bi-directional rotary driving forces having two or three rotational angles. The switching described above is performed by movement, in the direction of the axis of the shaft, of the link body by utilizing the repulsive or attractive action of an electromagnetic force. The movement of the link body is performed by direct application of the electromagnetic force, or alternatively, by utilizing the principle of leverage through an arm.
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