LOCKING DEVICE FOR ELECTROMECHANICAL ACTUATOR AND ELECTROMECHANICAL ACTUATOR COMPRISING THIS DEVICE

• US 20200132176A1
• Filed: 06/26/2018
• Published: 04/30/2020
• Est. Priority Date: 06/29/2017
• Status: Active Grant

• Current Assignee: Safran Electronics & Defense Actuation
• Original Assignee: Zodiac Actuation Systems
• Inventors: Hors, Daniel, Delong, Joffrey
• Granted Patent: US 11,396,933 B2
• Time in Patent Office: Days
• CPC Class Codes: B64C 25/24 electric
• CPC Class Codes: B64C 25/26 Control or locking systems therefor
• CPC Class Codes: F16H 25/2015 Means specially adapted for stopping actuators in the end position; Position sensing means

Abstract

This locking device for an electromechanical actuator comprises a rod that is movable relative to a cylinder under the action of a motor actuating the rod, an assembly of at least one hook that can be moved between a locked position in which said hooks engage in an indentation and an unlocked position in which said set of hooks is released from the indentation, one of said set of hooks and the indentation being provided on the cylinder and the other on the rod. It comprises a sliding lock that can slide relative to said hooks and to the indentation between a holding position in which said hooks are held in the locked position a released position in which said hooks are released under the action of the motor actuating the rod.

Claims

1. A locking device for an electromechanical actuator, comprising a rod that can move relative to a cylinder through the action of a motor for actuating the rod, said device comprising an assembly of at least one hook that can move between a locked position, in which said hooks snap-fit into an indentation, and an unlocked position, in which said assembly of hooks is released from the indentation, said set of hooks and the indentation being provided one on the cylinder and the other on the rod, characterized in that it comprises a lock that slides relative to said hooks and to the indentation between a position of holding said hooks in a locked position and a position of release of said hooks through the action of the motor for actuating the rod.

2. The device as claimed in claim 1, comprising a nut connected to the lock and capable of moving the sliding lock against a locking spring between a locked position, in which the sliding lock covers said hooks at least in part, and a locked position releasing the hooks.

3. The device as claimed in claim 2, wherein the lock is positioned relative to said hooks such that the lock is retracted against the force exerted by the spring through the action of said hooks.

4. The device as claimed in claim 2, wherein said hooks comprise at least one slope capable of interacting with a ramp of corresponding form of the indentation.

5. The device as claimed in claim 2, further comprising an unlocking spring designed to be arranged between the nut of the actuator and the rod of the actuator.

6. The device as claimed in claim 5, wherein the unlocking spring is prestressed in compression.

7. The device as claimed in claim 1, further comprising at least one sensor for sensing the position of the sliding lock.

8. The device as claimed in claim 1, further comprising a motor for commanding the movement of the lock capable of generating the movement of the lock upon unlocking.

9. An electromechanical actuator, comprising a rod that can move relative to a cylinder through the action of a motor for actuating the rod, characterized in that it comprises an internal locking device as claimed in claim 1.

10. The actuator as claimed in claim 9, comprising an assembly of at least one hook provided on the cylinder and an indentation provided on the rod such that the locking device acts in the deployed position of the rod, characterized in that it comprises a lock mounted slidably about the rod of the actuator and a locking spring interposed between the lock and a stop connected to the cylinder, the lock being able to move from a locked position, in which the sliding lock covers said hooks at least in part, to an unlocked position releasing the hook, through the action of said hooks, against the force exerted by the locking spring.