Method for maneuvering doors of bays of aircraft, and actuator used therefor
AssigneeMessier-Bugatti-Dowty
InventorsMarc QUENERCH'DU, Gerard BALDUCCI
Life of this patent
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Abstract
The invention relates to a method for locking a mobile element (101) of an aircraft, such as a hold door or a landing gear, the mobile element being moved between a deployed position and a closed or retracted position by means of an actuator (200) having a sliding stem (3) coupled to the mobile element, the stem being mounted so as to be able to slide in a body (1) of the actuator between an extended position corresponding to the deployed position of the mobile element and a withdrawn position corresponding to the closed or retracted position of the mobile element. The method of the invention comprises the step of positively blocking the sliding stem of the actuator in the withdrawn position.
Claims5
Method for locking a mobile element (101) of an aircraft, such as a hold door or a landing gear, the mobile element being moved between a deployed position and a closed or retracted position by means of an actuator (200) having a sliding stem (3) coupled to the mobile element, the stem being mounted so as to be able to slide in a body (1) of the actuator between an extended position corresponding to the deployed position of the mobile element and a withdrawn position corresponding to the closed or retracted position of the mobile element, characterized in that it comprises the step of positively blocking the sliding stem of the actuator in the withdrawn position.
Telescopic actuator specially adapted for implementing the method according to either of the preceding claims, comprising:
- a body (1) comprising means (2) for coupling it to a first external element;
- a stem (3) mounted so as to be able to slide telescopically into the body along a sliding axis (X) and comprising means (4) for coupling it to a second external element;
- a lead screw (5) mounted so as to be able to rotate on the body about the sliding axis and extending within the stem to engage with a nut (6) integral with the stem, such that a rotation of the lead screw causes the stem to slide;
- means (7, 9) for turning the lead screw (5);
- axial retention means (20) for the lead screw, said axial retention means being controllable so as to axially release the lead screw and thus allow the sliding stem to slide freely in the body;
- a positive blocking member (30;
- 31;
- 32) for selectively blocking the lead screw in rotation and thus locking the actuator in position.
Dependencies are inferred from the claim text.