FLAP ACTUATOR

摘要

A flap actuator (10) is provided for controlling movement of a flap (18) on a wing (12) of an aircraft. The flap actuator (10) includes a housing (124) having a leading end and a trailing end. A ball nut (92) is rotatably supported in the housing (124). A motor (32) has a rotatable drive shaft that is rotatable in first and second opposite directions. A gear assembly translates rotation of the drive shaft to the ball nut (92). A ball screw (98) extends along a longitudinal axis and has a terminal end operatively connectable to the flap (18). The ball screw (98) is movable between a first retracted in response to rotation of the ball nut (92) in a first direction and a second extended position in response to rotation of the ball nut (92) in a second direction. A one-way roller clutch (126) is operatively connectable to the ball nut (92). The roller clutch (126) engages the housing (124) and prevents rotation of the ball nut (92) in a first direction in response to a compressive force on the ball screw (98) by the flap (118). First and second concentric gimbals (134 and 136) are positioned about the longitudinal axis adjacent the housing (124). The gimbals (134 and 136) interconnect the housing (124) to the wing (12).