초록 ▼

A rotary actuator having an output driver rod mounted within an output sleeve that is rotated by a drive motor. A driving mechanism for coupling the drive motor to the output sleeve includes a worm wheel that is mounted on the output sleeve so as to be freely rotatable relative to the output sleeve

A rotary actuator having an output driver rod mounted within an output sleeve that is rotated by a drive motor. A driving mechanism for coupling the drive motor to the output sleeve includes a worm wheel that is mounted on the output sleeve so as to be freely rotatable relative to the output sleeve and a driving portion for transmitting power from the worm wheel to the output sleeve. A clutch also is mounted on the output sleeve for rotation with and for axial movement along the output sleeve. When in its first position, the clutch couples the drive portion of the drive mechanism to the output sleeve for transmitting rotational force. The clutch is normally biased into its first position for engagement with the drive portion of the drive mechanism and thus for coupling it to the output sleeve for transmitting rotational force. A declutch mechanism causes the clutch to be moved into a second position out of engagement with the drive portion. The declutch mechanism is capable of switching from a powder driver operation to a manual hand wheel mode of operation without going through a neutral position. A self-locking means is provided to prevent rotation of the hand wheel under torsional back force when the clutch is in the second position.

대표청구항 ▼

An actuator comprising: a drive motor; an output member capable of being coupled to an output drive rod; drive means including a worm wheel mounted around said output member and freely rotatable relative thereto, said worm wheel being arranged so as to be rotated by said drive motor, and a driving p

An actuator comprising: a drive motor; an output member capable of being coupled to an output drive rod; drive means including a worm wheel mounted around said output member and freely rotatable relative thereto, said worm wheel being arranged so as to be rotated by said drive motor, and a driving portion mounted on said worm wheel for transmitting power from said worm wheel to said output member; clutch means mounted on said output member at a location adjacent said driving portion for rotation therewith but being axially movable along said output member, said clutch means having at least one lug member at one end capable of engaging said driving portion and having at least one extension member at its other end coupling said clutch means to said output member so that said clutch means couples said output member to said driving portion of said drive means when said clutch means is arranged in a first position in which said lug member of said clutch means engages said driving portion of said drive means; bias means for normally biasing said clutch means into its first postion; declutch means capable of causing said clutch means to be moved into a second position so that said lug member is moved out of engagement with said driving portion and remain out of engagement when said driving portion is not rotated; said extension members capable of engaging said clutch means to said output member immediately upon movement of said clutch means out of the first position and into the second position; a hand wheel; said output member including a worm gear adapter means capable of manual rotation by said hand wheel when said clutch means is in said second position to rotate said output member through said last named engagement of said clutch means to said output member; and said output member arranged to be in engagement with said drive means solely when said clutch means is in the first position or to be in engagement with said worm gear adapter means solely when said clutch means is in the second position whereby said clutch means is movable from the first position into the second position without passing through a neutral position.