Dispersion structure for impact
View Patent ↗Proposed is a structure. The structure includes a front body frame configured to surround a front surface of an airframe, a crash unit disposed at a front end of the body front frame, and a dash reinforcement assembly fastened to the front body frame and disposed on the rear surface of the crash unit.
1. An aircraft, comprising:
a front body frame configured to surround a front surface of an airframe;
a crash unit disposed at a front end of the front body frame, wherein the crash unit comprises a crash box formed in a longitudinal direction of the crash unit; and
a dash reinforcement assembly fastened to the front body frame and disposed on a rear surface of the crash unit.
2. The aircraft of claim 1 , wherein the crash unit further comprises:
an upper frame disposed between a front end of the crash box and the dash reinforcement assembly; and
a lower frame fastened to the upper frame and disposed at a lower front end of the crash box.
3. The aircraft of claim 2 , wherein the crash box further comprises one or more curved portions, protruding upwards, formed in the longitudinal direction of the crash unit.
4. The aircraft of claim 2 , wherein the lower frame is configured to surround at least a portion of an outer side of the dash reinforcement assembly.
5. The aircraft of claim 2 , wherein an end of the crash box facing the dash reinforcement assembly further comprises a supporting surface coupled, in surface contact, with the dash reinforcement assembly.
6. The aircraft of claim 2 , wherein the crash box comprises:
a first inclined portion configured to have a first setting angle with respect to a longitudinal direction of the airframe; and
a second inclined portion configured to have a second setting angle larger than the first setting angle with respect to the first inclined portion.
7. The aircraft of claim 1 , wherein the dash reinforcement assembly comprises:
an outer reinforcement formed at a position facing the crash unit;
an inner reinforcement disposed adjacent to an interior configured to position a passenger; and
a shock absorber disposed between the outer reinforcement and the inner reinforcement.
8. The aircraft of claim 1 , further comprising a floor assembly fastened to the dash reinforcement assembly and configured to receive impact that is applied to the crash unit.
9. The aircraft of claim 8 , wherein the floor assembly further comprises a skid unit overlapping and contacting the front body frame and the crash unit.
10. An aircraft, comprising:
a front body frame configured to surround a front surface of an airframe;
a crash unit disposed at a front end of the front body frame and configured such that a lower end is inclined in a longitudinal direction of the airframe, wherein the crash unit comprises a crash box formed in a longitudinal direction of the crash unit; and
a dash reinforcement assembly fastened to the front body frame and disposed on a rear surface of the crash unit.
11. The aircraft of claim 10 , wherein the crash unit further comprises:
an upper frame disposed between a front end of the crash box and the dash reinforcement assembly; and
a lower frame fastened to the upper frame and disposed at a lower end of the front end of the crash box.
12. The aircraft of claim 11 , wherein the crash box further comprises one or more curved portions formed in the longitudinal direction of the crash unit and disposed in a height direction.
13. The aircraft of claim 11 , wherein the crash box comprises a U-shaped cross-section.
14. The aircraft of claim 11 , wherein the upper frame comprises an L shaped side cross-section.
15. The aircraft of claim 11 , wherein the crash box comprises:
a first inclined portion configured to have a first setting angle with respect to the longitudinal direction of the airframe; and
a second inclined portion configured to have a second setting angle larger than the first setting angle with respect to the first inclined portion.
16. The aircraft of claim 10 , wherein the dash reinforcement assembly comprises:
an outer reinforcement formed at a position facing the crash unit;
an inner reinforcement disposed adjacent to an interior configured to position a passenger; and
a shock absorber disposed between the outer reinforcement and the inner reinforcement.
17. The aircraft of claim 10 , further comprising a floor assembly fastened to the dash reinforcement assembly and configured to receive impact that is applied to the crash unit.
18. The aircraft of claim 17 , wherein the floor assembly further includes a skid unit overlapping the front body frame and the crash unit in a contact state.