Door system with a deceleration mechanism

Patent metadata

Field	Value
Publication number	US-11274484-B2
Application number	US-201916687963-A
Country	US
Kind code	B2
Filing date	Nov 19, 2019
Priority date	Feb 27, 2019
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A deceleration mechanism for a door system. In particular, a door system that is adapted to control an opening of a door module that separates compartments of an aircraft, the door module comprising a door panel that performs a rotational movement above a floor structure of the aircraft during an opening of the door module, comprises a deceleration mechanism that comprises a bolt, a bolt moving mechanism that is attached to the bolt, a latch mechanism that is removably connected to the bolt moving mechanism an activation mechanism that is attached to the latch mechanism, and a brake element that is rigidly attached to the bolt.

First claim

What is claimed is:

1. A door system that is adapted to control opening of a door module that separates compartments of an aircraft, the door module comprising a door panel that performs a rotational movement above a floor structure of the aircraft during opening of the door module, comprising:
a deceleration mechanism that is attached to a lower region of the door panel and comprises:
a bolt,
a bolt moving mechanism that is attached to the bolt,
a latch mechanism that is removably connected to the bolt moving mechanism and adapted to block the bolt moving mechanism in a normal mode and to release the bolt moving mechanism in a deceleration mode,
an activation mechanism that is attached to the latch mechanism and adapted to switch the latch mechanism from the normal mode to the deceleration mode when a predetermined air pressure difference threshold between the compartments of the aircraft is exceeded, and
a brake element that is rigidly attached to the bolt, wherein the bolt moving mechanism, upon release, presses the bolt against the brake element such that the brake element pushes against the floor structure, thereby decelerating the rotational movement of the door panel.

2. The door system of claim 1 , wherein the door module further comprises:
a door locking system that is arranged on the door panel and maintains the door panel in the closed position.

3. The door system of claim 2 , wherein the door locking system is adapted to release the door panel from the closed position when the predetermined air pressure difference threshold between the compartments of the aircraft is exceeded.

4. The door system of claim 2 , further comprising:
a control unit that is connected to at least one of the activation mechanism or the door locking system and generates a trigger signal when the predetermined air pressure difference threshold between compartments is exceeded.

5. The door system of claim 4 , wherein the activation mechanism further comprises:
an electrical activation element that is adapted to activate the activation mechanism in response to the trigger signal of the control unit.

6. The door system of claim 5 , wherein the electrical activation element comprises at least one of a solenoid, an electrical actuator, a pyrotechnic actuator, or a gas cartridge.

7. The door system of claim 1 , wherein the activation mechanism comprises:
a mechanical activation element that activates the activation mechanism when an acceleration of the rotational movement of the door panel is above a predetermined acceleration threshold.

8. The door system of claim 7 , wherein the predetermined acceleration threshold is selected based on a predetermined mass inertia of the door panel.

9. The door system of claim 8 , wherein the bolt moving mechanism exerts a predetermined pressure on the bolt that is selected at least based on the predetermined mass inertia of the door panel.

10. The door system of claim 9 , wherein the bolt moving mechanism and the latch mechanism exhibit an interface with a friction that is based on the predetermined pressure that the bolt moving mechanism exerts on the bolt.

11. The door system of claim 1 , wherein the floor structure is covered by a carpet, and wherein the brake element detaches the carpet from the floor structure in the deceleration mode.

12. A method of using the door system of claim 1 for controlling an opening of a door module that separates first and second compartments of an aircraft, the door module comprising a door panel that performs a rotational movement above a floor structure of the aircraft during an opening of the door module, the method comprising:
determining whether a difference between a first air pressure of the first compartment and a second air pressure of the second compartment exceeds a predetermined air pressure difference threshold;
in response to determining that the difference between the first air pressure of the first compartment and the second air pressure of the second compartment exceeds the predetermined air pressure difference threshold, unlocking a door locking system and releasing the door panel from a closed position;
activating an activation mechanism;
releasing a latch mechanism with the activation mechanism;
releasing a bolt moving mechanism with the latch mechanism;
with the bolt moving mechanism pressing a bolt against a brake element; and
pushing the brake element onto the floor structure to decelerate the rotational movement during the opening of the door panel.

13. The method of claim 12 , wherein the floor structure is covered by a detachable carpet, and wherein pushing the brake element onto the floor structure to decelerate the rotational movement during the opening of the door panel further comprises:
detaching the detachable carpet with the brake element; and
wrinkling the detachable carpet to decelerate the rotational movement during the opening of the door panel.

14. The method of claim 12 , wherein the activation mechanism comprises a hinge, and wherein releasing the bolt moving mechanism with the latch mechanism further comprises:
moving the latch mechanism relative to the bolt moving mechanism based on a mass inertia of the door panel.

15. The method of claim 12 , wherein the activation mechanism comprises at least one of a solenoid, an electric actuator, a pyrotechnical activation device, or a gas cartridge, and wherein releasing the bolt moving mechanism with the latch mechanism further comprises:
moving the latch mechanism relative to the bolt moving mechanism with the at least one of a solenoid, an electric actuator, a pyrotechnical activation device, or a gas cartridge.

16. A door system for a door module that separates compartments of an aircraft, the door module comprising a door panel that performs a rotational movement above a floor structure of the aircraft during opening of the door module, comprising:
a door panel decelerator attached to a lower region of the door panel, the door panel decelerator comprising:
a biased bolt, the biased bolt blocked in a normal mode and released in a deceleration mode,
an activator attached to the biased bolt to switch the biased bolt from the normal mode to the deceleration mode when a predetermined air pressure difference threshold between the compartments of the aircraft is exceeded, and
a brake rigidly attached to the bolt, wherein the biased bolt, upon release, presses the biased bolt against the brake such that the brake pushes against the floor structure, thereby decelerating the rotational movement of the door panel.

17. The door system of claim 16 , wherein the door module further comprises:
a door lock arranged on the door panel to maintain the door panel in a closed position, wherein the door lock is adapted to release the door panel from the closed position when the predetermined air pressure difference threshold between the compartments of the aircraft is exceeded.

18. The door system of claim 17 , further comprising:
a controller connected to at least one of the activator or the door lock, the controller generating a trigger signal when the predetermined air pressure difference threshold between compartments is exceeded, and wherein the activator further comprises:
an electrical activator adapted to activate the activator in response to the trigger signal of the controller.

19. A door system adapted to control opening of a door that separates compartments of an aircraft, the door comprising a door panel rotatable above a floor of the aircraft during the opening of the

Assignees

• Airbus Helicopters Deutschland GmbH

Inventors

• Tendyra Thomas
• Renner Uwe
• Pascoe Xaver
• Buehlmeyer Markus
• Ward Stephen
• Borchers Guido

Classifications

• E05Y2400/36

  Speed control, detection or monitoring · CPC title

• B64C1/00

  Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like · CPC title

• E05Y2900/502

  for aircraft or spacecraft · CPC title

• E05Y2900/531

  Doors · CPC title

• B64C2001/009

  comprising decompression panels or valves for pressure equalisation in fuselages or floors · CPC title