Radial slit disc energy attenuation system

Patent metadata

Field	Value
Publication number	US-11427337-B2
Application number	US-201916402443-A
Country	US
Kind code	B2
Filing date	May 3, 2019
Priority date	Jan 30, 2019
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

A vehicle including a housing, and a vehicle seat disposed in the housing. The vehicle further includes at least one radial slit disc energy attenuation assembly having an upper end coupled to the vehicle seat and a lower end coupled the housing. The radial slit disc energy attenuation assembly includes a slit disc stack having a plurality of deflectable discs configured to deflect in response to realizing a force applied by the vehicle seat.

First claim

What is claimed is:

1. A vehicle comprising:
a housing;
a vehicle seat disposed in the housing; and
at least one radial slit disc energy attenuation assembly configured for installation with the vehicle seat, the at least one radial slit disc energy attenuation assembly, the at least one radial slit disc energy attenuation assembly including an upper end coupled to the vehicle seat and a lower end coupled the housing, the at least one radial slit disc energy attenuation assembly including a slit disc stack having a plurality of deflectable discs configured to deflect in response to realizing a force applied by the vehicle seat, the plurality of deflectable discs comprising a plurality of slit discs and a plurality of spacer discs, the plurality of slit discs and the plurality of spacer discs vertically stacked in an alternating arrangement with respect to one another,
wherein the slit disc stack extends along a central axis (A) from a lower stack end to an upper stack end to define a stack height,
wherein the at least one radial slit disc energy attenuation assembly further includes a plunger extending from an upper end to a lower end, the lower end positioned proximate to the upper stack end and configured to penetrate the slit disc stack in response to receiving the collapsing force applied by the vehicle seat,
wherein the plunger includes a series of alternating series of ridges and furrows extending parallel to the central axis (A) from the upper end to the lower end to define a corrugated body, and
wherein in response to penetrating the slit disc stack, energy is transferred to at least one deflected slit disc and is dissipated within the slit disc stack.

2. The vehicle of claim 1 , wherein an individual spacer disc is interposed directly between each opposing pairs of slit discs included in the slit disc stack to define a gap between the pair of opposing slit discs.

3. The vehicle of claim 2 , wherein each slit disc includes a plurality of slits extending radially from a central opening toward the outer edge.

4. The vehicle of claim 3 , wherein the plurality of slits defines individual flexible sectors configured to deflect.

5. The vehicle of claim 4 , wherein each spacer disc has an annular-shaped body that extends circumferentially about the central axis (A) to define an inner void configured to receive a portion of a deflected flexible sector.

6. A radial slit disc energy attenuation assembly configured for installation with a vehicle seat, comprising:
a slit disc stack extending along a central axis (A) from a lower stack end to an upper stack end to define a stack height, the slit disc stack including a plurality of slit discs and a plurality of spacer discs, the plurality of slit discs and the plurality of spacer discs vertically stacked in an alternating arrangement with respect to one another; and
a plunger extending from an upper end to a lower end, the lower end positioned proximate to the upper stack end and configured to penetrate the slit disc stack in response to receiving an applied force,
wherein the plunger includes a series of alternating series of ridges and furrows extending parallel to the central axis (A) from the upper end to the lower end to define a corrugated body, and
wherein in response to penetrating the slit disc stack, energy is transferred to at least one deflected slit disc and is dissipated within the slit disc stack.

7. The radial slit disc energy attenuation assembly of claim 6 , wherein an individual spacer disc is interposed directly between each opposing pairs of slit discs included in the slit disc stack to define a gap between the pair of opposing slit discs.

8. The radial slit disc energy attenuation assembly of claim 7 , wherein each slit disc includes a plurality of slits extending radially from a central opening toward the outer edge.

9. The radial slit disc energy attenuation assembly of claim 8 , wherein the plurality of slits defines individual flexible sectors configured to deflect.

10. The radial slit disc energy attenuation assembly of claim 9 , wherein each spacer disc has an annular-shaped body that extends circumferentially about the central axis (A) to define an inner void configured to receive a portion of a deflected flexible sector.

11. The radial slit disc energy attenuation assembly of claim 1 , wherein each furrow has a first diameter and each ridge has a second diameter that is greater than the first diameter.

12. A method of dissipating energy, the method comprising:
stacking a plurality of slit discs and spacer discs in an alternating arrangement along a central axis (A) from a lower stack end to an upper stack end to define a slit disc stack and configured for installation with a vehicle seat;
positioning a plunger at the upper stack end during a non-actuated position, the plunger including a series of alternating series of ridges and furrows extending parallel to the central axis (A) from the upper end to the lower end to define a corrugated body; and
applying a force to the plunger in response to collapsing a cyclic disc-deformation structure; and
transferring energy delivered from the plunger to the slit disc stack so as to dissipate the energy.

13. The method of claim 12 , wherein transferring the energy comprises stroking the plunger into the slit disc stack to deflect at least one slit discs.

14. The method of claim 13 , wherein deflecting the at least one slit disc dissipates the energy delivered from the plunger.

15. The method of claim 14 , wherein deflecting the at least one slit disc comprises deflecting individual flexible sectors of the at least one slit disc into a gap defined by a proximate spacer disc.

16. The method of claim 15 , wherein stroking the plunger into the slit disc stack comprises a series of entries and exits through the at least one slit disc so to pulsate the force applied to the at least one slit disc.

Assignees

• Goodrich Corp

Inventors

• Saini Mohinder
• Purushothaman Srijith
• Jathavedan Krishnakumar Vadakkedathu

Classifications

• B64D11/0619

  with energy absorbing means specially adapted for mitigating impact loads for passenger seats, e.g. at a crash · CPC title

• F16F7/12

  using plastic deformation of members {(F16F9/30 takes precedence; yieldable means for mounting bumpers on vehicles B60R19/26; yieldable or collapsible steering columns B62D1/192)} · CPC title

• F16F9/30

  with solid or semi-solid material, e.g. pasty masses, as damping medium {(in devices where rotary elements are damped by viscous shear effect only, any throttling effect being immaterial F16F9/12; where members moving with a rotating system are being damped F16F15/16)} · CPC title

• F16F7/125

  Units with a telescopic-like action as one member moves into, or out of a second member (F16F7/124, F16F7/127, F16F7/128 take precedence) · CPC title

• B64D25/04 Primary

  Seat modifications · CPC title