ELECTRIC ACTUATOR AND CONTROL VALVE INCLUDING THE ELECTRIC ACTUATOR
First Claim
1. An electric actuator for driving a movable body, the electric actuator comprising:
- a direct current (DC) motor that is configured to generate power which drives the movable body in its movement direction;
a deceleration mechanism that includes;
an input gear fixed to a motor shaft of the DC motor;
an intermediate gear rotated in engagement with the input gear;
an output gear rotated in engagement with the intermediate gear; and
an output shaft coupled with the output gear to be rotatable integrally with the output gear, wherein the deceleration mechanism is configured to decelerate rotation of the motor shaft and to transmit the decelerated rotation to the output shaft; and
a return mechanism that includes;
a first resilient member configured to apply resilient force, which urges the movable body in a direction to return the movable body from its displacement position to initial position, to the output shaft or the output gear; and
a second resilient member configured to apply resilient force, which urges the movable body in the direction to return the movable body from its displacement position to initial position, to the motor shaft, the input gear, or the intermediate gear.
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Accused Products
Abstract
An electric actuator includes a direct current (DC) motor, a deceleration mechanism having an input gear, an intermediate gear, an output gear, and an output shaft, and a return mechanism. The return mechanism includes a first resilient member and a second resilient member. The first resilient member is configured to apply resilient force, which urges a movable body in a direction to return the movable body from its displacement position to initial position, to the output shaft or the output gear. The second resilient member is configured to apply resilient force, which urges the movable body in the direction to return the movable body from its displacement position to initial position, to a motor shaft, the input gear, or the intermediate gear.
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Citations
12 Claims
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1. An electric actuator for driving a movable body, the electric actuator comprising:
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a direct current (DC) motor that is configured to generate power which drives the movable body in its movement direction; a deceleration mechanism that includes; an input gear fixed to a motor shaft of the DC motor; an intermediate gear rotated in engagement with the input gear; an output gear rotated in engagement with the intermediate gear; and an output shaft coupled with the output gear to be rotatable integrally with the output gear, wherein the deceleration mechanism is configured to decelerate rotation of the motor shaft and to transmit the decelerated rotation to the output shaft; and a return mechanism that includes; a first resilient member configured to apply resilient force, which urges the movable body in a direction to return the movable body from its displacement position to initial position, to the output shaft or the output gear; and a second resilient member configured to apply resilient force, which urges the movable body in the direction to return the movable body from its displacement position to initial position, to the motor shaft, the input gear, or the intermediate gear. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification