US 12,422,028 B2
Locking/unlocking system for a lost-motion thrust reverser actuator, and actuator including such a system
Mickael Werquin, Moissy-Cramayel (FR)
Assigned to SAFRAN ELECTRONICS & DEFENSE, Paris (FR)
Filed by SAFRAN ELECTRONICS & DEFENSE, Paris (FR)
Filed on Dec. 7, 2023, as Appl. No. 18/532,456.
Prior Publication US 2025/0224023 A1, Jul. 10, 2025
Int. Cl. F16H 25/24 (2006.01); F02K 1/76 (2006.01)
CPC F16H 25/2454 (2013.01) [F02K 1/766 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A locking/unlocking system for an actuator for a thrust reverser, the actuator comprising a first element and a second element mounted movably in translation and in rotation relative to the first element, a rotation of the first element relative to the second element being configured to translate the second element relatively to the first element, the locking/unlocking system comprising:
an input gear configured to drive the first element in rotation;
a locking part rotationally fixed to the first element; and
a locking member movable between a locked position in which the locking member prevents a rotation of the locking part and of the first element, and an unlocked position in which the locking member allows a rotation of the locking part and of the first element;
wherein the locking/unlocking system comprises a preloading arrangement, the preloading arrangement allowing a rotation of the input gear relative to the locking part when a torque between the input gear and the locking part is less than a preloading threshold of the preloading arrangement and allowing a driving in rotation of the locking part by the input gear, when the torque becomes greater than the preloading threshold, the preloading arrangement comprising displacing elements configured to allow that the rotation of the input gear displaces the locking member from the locked position to the unlocked position, the driving movement then being transmitted to the first element by the preloading arrangement in order to allow the deployment of the actuator.