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ELECTRIC ACTUATOR AND CONTROL VALVE INCLUDING THE ELECTRIC ACTUATOR

  • US 20130140477A1
  • Filed: 12/03/2012
  • Published: 06/06/2013
  • Est. Priority Date: 12/05/2011
  • Status: Abandoned Application
First Claim
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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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