Assembly provided with a disconnectable coupling system having a mechanical fuse and a friction brake

Patent metadata

Field	Value
Publication number	US-11794878-B2
Application number	US-202217730690-A
Country	US
Kind code	B2
Filing date	Apr 27, 2022
Priority date	Apr 28, 2021
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

An assembly comprising a first part and a second part, the assembly comprising a disconnectable coupling system provided with a mechanical fuse for securing the first part and the second part according to an axis of movement up to a breaking threshold. The assembly comprises at least one single-use friction brake interposed between the first part and the second part, the friction brake braking a movement of the first part with respect to the second part after the mechanical fuse has broken.

First claim

What is claimed is:

1. An assembly comprising a first part and a second part, the assembly comprising a disconnectable coupling system provided with a mechanical fuse for securing the first part and the second part according to an axis of movement up to a breaking threshold,
wherein the assembly comprises at least one single-use friction brake interposed between the first part and the second part, the friction brake braking a movement of the first part with respect to the second part after the mechanical fuse has broken, the friction brake comprising a stud that is trapped, when in a rest position, in a housing of the second part before the break, the stud being arranged facing a wall of the first part, the stud and the wall being able to move relative to each other following the break, the wall applying a force to the stud, following the break and the movement, that moves the stud in translation relative to the second part.

2. The assembly according to claim 1 ,
wherein the stud is able to move in translation along a translation axis orthogonal to the axis of movement.

3. The assembly according to claim 1 ,
wherein the wall comprises two faces arranged to either side of the stud according to an axis orthogonal to a translation axis of the stud.

4. The assembly according to claim 3 ,
wherein each face has a non-zero angle with respect to the axis orthogonal to a translation axis of the stud.

5. The assembly according to claim 3 ,
wherein at least one of the two faces is a planar face.

6. The assembly according to claim 3 ,
wherein at least one of the faces is an at least partially skew face.

7. The assembly according to claim 6 ,
wherein the at least partially skew face is convex when viewed from the stud.

8. The assembly according to claim 1 ,
wherein the mechanical fuse comprises a fuse stop secured to the second part and bearing against the stud according to the translation axis.

9. The assembly according to claim 1 ,
wherein the mechanical fuse comprises a rod that extends into a first hole of the first part and into a second hole of the second part.

10. The assembly according to claim 1 ,
wherein the assembly comprises at most three friction brakes.

11. An actuator provided with a motor,
wherein the actuator comprises the assembly according to claim 1 , the motor being connected by a mechanical link to the second part or to the first part.

12. A vehicle,
wherein the vehicle comprises the assembly according to claim 1 .

13. The vehicle according to claim 12 ,
wherein the first part or the second part is connected to a motor by a mechanical link, the first part or the second part that is not connected to the mechanical link being connected to a mechanical flight control channel that extends from a flight control that can be operated by a pilot to a control member of the vehicle.

14. The assembly according to claim 1 ,
wherein the wall applying the force to the stud, following the break and the movement, that moves the stud in translation relative to the second part moves the stud in translation relative to the housing of the second part whereby friction of the stud against the housing of the second part brakes the movement.

15. An assembly comprising:
a first part and a second part;
a disconnectable coupling system provided with a mechanical fuse which secures together the first part and the second part according to an axis of movement up to a breaking threshold;
the mechanical fuse being broken upon the breaking threshold being reached in response to a movement of the first part with respect to the second part according to the axis of movement while the second part is seized;
a single-use friction brake interposed between the first part and the second part, the friction brake braking the movement of the first part with respect to the second part after the mechanical fuse has broken,
the friction brake including a stud, the stud being arranged facing a wall of the first part and being arranged within a housing of the second part, the stud being trapped in the housing of the second part prior to the mechanical fuse being broken, the stud and the wall of the first part being movable relative to each other after the mechanical fuse has broken, and
the wall of the first part, following the movement of the first part with respect to the second part after the mechanical fuse has broken, applying a force to the stud that moves the stud in translation relative to the housing of the second part whereby friction of the stud against the housing of the second part brakes the movement of the first part with respect to the second part.

Assignees

• Airbus Helicopters

Inventors

• Ruet Laurent

Classifications

• B64C13/343 Primary

  overriding of personal controls; with automatic return to inoperative position · CPC title

• B64C13/0427

  for actuating trim · CPC title

• F16D9/06 Primary

  by breaking due to shear stress · CPC title

• F16D7/024

  with axially applied torque limiting friction surfaces · CPC title

• B64C13/30

  using cable, chain, or rod mechanisms · CPC title