Latch Pin Assembly for Folding Wing Tip System

摘要

A folding wing tip system of an aircraft includes a latch pin actuator having a primary mechanical lock and a secondary hydraulic lock. The mechanical lock may include a lock cam movable between a lock position, in which the lock cam engages the latch pin, and an unlock position, in which the lock cam is disengaged from the latch pin, and a first lock actuator mechanically coupled to the lock cam and configured to provide a bias force pushing the lock cam toward the lock position. The hydraulic lock may be disposed in an unlatching hydraulic line and has an initial state, in which fluid flow through the unlatching hydraulic line is blocked thereby to hold the latch pin in the latched position, and an open state, in which fluid flow through the unlatching hydraulic line is permitted thereby to permit refraction of the latch pin to the unlatched position.

主权项

1. A latch pin assembly provided on an aircraft having a hydraulic fluid source, the latch pin assembly comprising:
a piston including a piston head; a latch pin enclosing the piston head and defining an inner chamber, the piston head separating the inner chamber into an extend chamber and a retract chamber, the latch pin including a latch surface; a latching hydraulic line fluidly communicating between the extend chamber and the hydraulic fluid source; an unlatching hydraulic line fluidly communicating between the retract chamber and the hydraulic fluid source; a lock cam movable between a lock position, in which the lock cam engages the latch surface of the latch pin, and an unlock position, in which the lock cam is disengaged from the latch surface of the latch pin; a first lock actuator mechanically coupled to the lock cam and configured to provide a bias force pushing the lock cam toward the lock position; a second lock including a hydraulic lock disposed in the unlatching hydraulic line and having an initial state, in which fluid flow through the unlatching hydraulic line is blocked, and an open state, in which fluid flow through the unlatching hydraulic line is permitted.