Actuation device for moving a movable cover of a thrust reverser

• US 9,458,795 B2
• Filed: 03/21/2014
• Issued: 10/04/2016
• Est. Priority Date: 03/22/2013
• Status: Active Grant

• Current Assignee: Safran Electronics & Defense
• Original Assignee: Sagem Defense Securite SA (Safran SA)
• Inventors: Werquin, Mickael, Dauvergne, Denis, Gomolko, Oleg
• Primary Examiner(s): Joyce, William C
• Application Number:
  US14/778,972
• Publication Number:
  US 20160061146A1
• Time in Patent Office: 928 Days
• Field of Search: 74/893.9, 602/262, 244/110.B
• US Class Current: 1/1
• CPC Class Codes: F02K 1/766 with blocking systems or locking devices; Arrangement of locking devices for thrust reversers
• CPC Class Codes: F16H 25/2454 Brakes; Rotational locks

Abstract

The invention relates to an actuation device (1) for moving a movable cover of a thrust reverser. Said actuation device includes: —an actuator including a first element (4), such as a screw, and a second element (5), such as a nut, that engages with the first element such that rotation of the first element causes translation of the second element; —a locking portion (31) rotatable between a locked position, wherein the locking portion prevents the first element (4) from rotating, and an unlocked position, wherein the locking portion (31) allows the first element (4) to rotate; and —an inhibiting part (45) that is translatable between a first position, wherein the inhibiting part (45) allows the locking portion (31) to rotate, and a second position, wherein the inhibiting part (45) prevents the locking portion (31) from rotating into the locked position.

Claims

1. An actuation device for displacing the movable cover of a thrust reverser, including:

an actuator including a first element and a second element movably mounted in translation with respect to the first element, one of the first element and the second element being a screw, and the other being a nut capable of cooperating with the screw, so that a rotation of the first element with respect to the second element brings about translation of the second element with respect to the first element,

a locking device including a lock portion movable in rotation with respect to the first element between a locked position wherein the lock portion prevents rotation of the first element and an unlocked position wherein the lock portion allows rotation of the first element, and a drive member capable of driving in rotation the lock portion toward the unlocked position,

a lock inhibitor device including an inhibiting part movable in translation with respect to the first element between a first position wherein the inhibiting part allows rotation of the lock portion between the locked position and the unlocked position, and a second position wherein the inhibiting part prevents rotation of the lock portion toward the locked position.

2. The device according to claim 1, wherein the lock portion is movable in rotation about an axis (X′

) parallel to an axis (X) of rotation of the first element.

3. The device according to claim 1, wherein the locking device includes a tooth mounted integral in rotation with the first element, the lock portion being capable, in the locked position, to come into engagement with the tooth to prevent rotation of the first element.

4. The device according to claim 3, wherein the tooth is asymmetrical so that in the locked position, the lock portion prevents rotation of the first element in a first direction (C) and allows rotation of the first element in a second direction (D), opposite to the first direction.

5. The device according to claim 1, wherein the lock portion includes a convex portion and a substantially planar portion arranged so that, in the locked position, the convex portion is an obstacle to the rotation of the first element, and in the unlocked position, the substantially planar portion allows rotation of the first element.

6. The device according to claim 1, wherein the driving member includes a rotary electromagnet.

7. The device according to claim 6, wherein the driving member has an axis of rotation (X′

) combined with an axis of rotation of the lock portion.

8. The device according to claim 1, wherein the locking device includes a return member capable of driving the lock portion toward the locked position.

9. The device according to claim 1, wherein the inhibiting device includes a latch integral in rotation with the lock portion and an opening through which the latch passes when the lock portion is driven in rotation.

10. The device according to claim 9, wherein, when the inhibiting part is in the second position, the inhibiting part obstructs the opening to prevent passage of the latch through the opening.

11. The device according to claim 9, wherein, when the inhibiting part is in the first position, the inhibiting part uncovers the opening to allow the passage of the latch through the opening.

12. The device according to claim 9, wherein the inhibiting part includes a full portion and an open portion having an opening, and wherein, when the inhibiting part is in the first position, the open portion is aligned with the latch to allow the latch to pass through the opening, and when the inhibiting part is in the second position, the full portion is aligned with the latch to form an obstacle to a rotation of the latch.

13. The device according to claim 1, wherein the inhibiting device includes a return member capable of driving the inhibiting part toward the second position.

14. The device according to claim 1, wherein the actuator includes a rod movable in translation with respect to the first element, the movable rod being able to be driven by the second element to displace the inhibiting part toward the first position.

15. The device according to claim 14, wherein the movable rod extends at least partially inside the first element.

19. The device according to claim 1, wherein the first element is the screw and the second element is the nut.

16. The device according to claim, further including a manual unlocking device to drive in rotation the lock portion so as to bring the lock portion into the unlocked position without activating the driving member.

17. The device according to claim 16, wherein the driving member includes a rotor and a stator, and the manual unlocking device includes a first part movable in rotation with respect to the stator, the first part being capable, when it is driven in rotation in a first direction, to come into engagement with the rotor to drive in rotation the rotor so as to displace the lock portion toward the unlocked position, and when it is driven in rotation in a second direction, opposite to the first direction, to become disengaged from the rotor.

18. The device according to claim 17, wherein the manual unlocking device includes a second part, fixed in relation to the stator and a third part movably mounted in translation with respect to the first part, and integral in rotation with the first part, and wherein the third part includes a pin capable of sliding in a lumen made in the second part to guide the translation of the third part with respect to the first and second parts and/or to guide the rotation of the second and third parts with respect to the first part.