| 摘要 |
An electric valve actuator includes: a power output member 12 having a first engagement section; a rod member 13 fixedly disposed on the power output member; a first transmission member 14 pivotally disposed on the power output member and having a second engagement section and a first worm gear section; a second transmission member 15 pivotally disposed on the rod member and having a shaft body section and an eccentric shaft section; a third transmission member 16 pivotally disposed on the eccentric shaft section and having a third engagement section, a lower section of the third engagement section being engaged with the first engagement section, an upper section being engaged with the second engagement section; a fourth transmission member 17 fixedly disposed on the shaft body section and having a second worm gear section 171; a first worm 18 engaged with the first worm gear section; and a second worm 19 engaged with the second worm gear section. The second worm and second worm gear section have automatic locking ability to prevent push-back when the valve is moved to a fully closed position. |
