Energy Absorption Device, Especially For Non-Axial Loads

• US 20120032459A1
• Filed: 10/17/2011
• Published: 02/09/2012
• Est. Priority Date: 10/12/2006
• Status: Active Grant

• Current Assignee: Magna Automotive Services GmbH
• Original Assignee: Magna Automotive Services GmbH
• Inventors: Fang, Xiangfan, Seper, Christoph
• Granted Patent: US 8,308,207 B2
• Time in Patent Office: Days
• US Class Current: 293/132
• CPC Class Codes: B60R 19/34 destroyed upon impact, e.g. one-shot type
• CPC Class Codes: F16F 7/12 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

Abstract

The invention relates to an energy absorption device which can be arranged to absorb energy by deformation between a support structure of a vehicle and a damper, the energy absorption device carrying a deformable main profile which has a hollow body-type cross-section. The aim of the invention is to improve an energy absorption device of the aforementioned type in such a manner that the energy can be well carried off even if the forces produced by an accident impact the energy absorption device at an angle. For this purpose, a deformable supplementary profile is provided on the cross-section of the main profile.

Claims

1. An energy absorption device adapted to be disposed between a support structure of a vehicle and a bumper to absorb energy by deformation, the energy absorption device comprising:

a deformable, hollow main profile extending in a longitudinal direction between a bumper side that supports the bumper and a support structure side that is mounted to the support structure, the support structure side being opposite the bumper side; and

a deformable auxiliary profile extending in said longitudinal direction between the bumper side and the support structure side, said deformable auxiliary profile fastened on said main profile in an area at the support structure side and in an area at the bumper side.

2. The energy absorption device according to claim 1, wherein the bumper is disposed at an offset relative to the support structure and the energy absorption device bridges said offset, and wherein said auxiliary profile is provided to stabilize a first segment of said main profile, said first segment being disposed as anterior in said offset direction.

3. The energy absorption device according to claim 2, wherein said main profile further comprises a second segment that is joined to said first segment, each of the said segment and said second segment being a shell-type component, said first segment and said second segment defining lower and upper portions of said main profile, respectively, relative to the vehicle.

4. The energy absorption device according to claim 1, wherein said auxiliary profile stabilizes a lateral segment of said main profile which is approximately horizontal in relation to the vehicle.

5. The energy absorption device according to claim 4, wherein said lateral segment is an outer segment in relation to a longitudinal central direction of the vehicle.

6. The energy absorption device according to claim 1, wherein said auxiliary profile is generally arched-shaped when viewed in a cross-section that is taken in a plane normal to said longitudinal direction.

7. The energy absorption device according to claim 6, wherein a cross-section of said auxiliary profile forms an essentially convex contour with an area of the cross-section of said main profile.

8. The energy absorption device according to claim 6, wherein said auxiliary profile has chamfers.

9. The energy absorption device according to claim 3, wherein said auxiliary profile is disposed within an interior volume of said main profile between said first segment and said second segment.

10. The energy absorption device according to claim 1, wherein said auxiliary profile tapers in a direction toward said support structure of the vehicle.

11. The energy absorption device according to claim 10, wherein a height of a cross-section of said auxiliary profile decreases in the direction toward said support structure of the vehicle.

12. The energy absorption device according to claim 1, wherein said auxiliary profile tapers in a direction toward the bumper.

13. The energy absorption device according to claim 12, wherein a height of said cross-section of said auxiliary profile decreases in the direction toward the bumper.

14. The energy absorption device according to claim 1, wherein the bumper is disposed at an offset relative to said support structure and the energy absorption device bridges said offset, and wherein said auxiliary profile defines a slope relative to the longitudinal direction, said slope being opposite to the direction of the offset.

15. The energy absorption device according to claim 1, wherein the bumper is disposed at an offset to said support structure and the energy absorption device bridges said offset, and wherein said auxiliary profile has an upper surface which is inclined relative to said longitudinal direction oppositely to the direction of said offset.

16. The energy absorption device according to claim 1, wherein said auxiliary profile is laterally inclined horizontally in relation to a longitudinal direction of said support structure.

17. The energy absorption device according to claim 16, wherein said auxiliary profile has a profile back which is laterally inclined horizontally in relation to said longitudinal direction of said support structure.

18. The energy absorption device according to claim 1, wherein said auxiliary profile is a first auxiliary profile and wherein the device further comprises a second auxiliary profile that is spaced from said first auxiliary profile.

19. The energy absorption device according to claim 1, wherein said auxiliary profile is fastened to said main profile over a greater length in an area on said support structure side than in an area on said bumper side.

20. The energy absorption device according to claim 19, wherein said auxiliary profile is fastened to said main profile in a transition area that is intermediate said area at said support structure side and said area at said bumper side, said auxiliary profile fastened to said main profile over a shorter length in said transition area than in said area at said support structure side and over a greater length than in said area at said bumper side.

21. The energy absorption device according to claim 20, wherein said auxiliary profile has a length, and wherein said auxiliary profile is fastened on said main profile over approximately 30% to 45% of the length of said auxiliary profile in said area at said support structure side.

22. The energy absorption device according to claim 21, wherein said auxiliary profile is fastened on said main profile over approximately 40% of the length of said auxiliary profile in said area at said support structure side.

23. The energy absorption device according to claim 19, wherein said auxiliary profile has a length, and wherein said auxiliary profile is fastened on said main profile over approximately 3% to 10% of the length of said auxiliary profile in said area at said bumper side.

24. The energy absorption device according to claim 23, wherein said auxiliary profile is fastened on said main profile over approximately 5% of the length of said auxiliary profile in said area at said bumper side.

25. The energy absorption device according to claim 20, wherein said auxiliary profile has a length, and wherein said auxiliary profile is fastened on said main profile over approximately 5% to 15% of the length of said auxiliary profile in said transition area.

26. The energy absorption device according to claim 25, wherein said auxiliary profile is fastened on said main profile over approximately 10% of the length of said auxiliary profile in said transition area.

27. The energy absorption device according to claim 1, wherein said auxiliary profile has a greater material thickness on said support structure side than on said bumper side.

28. The energy absorption device according to claim 27, wherein said auxiliary profile has at least two material parts of different material thicknesses.

29. The energy absorption device according to claim 27, wherein said auxiliary profile has a material part which has a material thickness varied by rolling.

30. The energy absorption device according to claim 1, wherein the material of said auxiliary profile has a higher strength on said support structure side than on said bumper side.

31. The energy absorption device according to claim 1, wherein said auxiliary profile has at least one longitudinal bead extending in its longitudinal direction.

32. The energy absorption device according to claim 31, wherein said at least one longitudinal bead is disposed in an area proximal to said support structure.

33. The energy absorption device according to claim 2, wherein said first segment has at least one transverse bead extending transversely to its longitudinal direction.

34. The energy absorption device according to claim 33, wherein said at least one transverse bead is disposed in an area proximal to said bumper.

35. The energy absorption device according to claim 1, wherein said bumper is disposed at an offset relative to said support structure and the energy absorption device bridges said offset, and wherein a first segment of said main profile, which is situated as anterior in said offset direction, has a higher deformation resistance than a second segment of said main profile, which is situated behind said first segment in said offset direction.

36. The energy absorption device according to claim 1, wherein a first segment of said main profile, which is located on a first horizontal side of said energy absorption device in relation to the vehicle, has a higher deformation resistance than a second segment of said main profile, which is located on a second horizontal side of the energy absorption device in relation to the vehicle.

37. The energy absorption device according to claim 35, wherein said first segment has a greater material thickness than said second segment.

38. The energy absorption device according to claim 36, wherein said first segment has a greater material thickness than said second segment.

39. The energy absorption device according to claim 35, wherein the material of said first segment has a higher strength than the material of said second segment.

40. The energy absorption device according to claim 36, wherein the material of said first segment has a higher strength than the material of said second segment.

41. The energy absorption device according to claim 35, wherein at least one of said first and second segments includes at least one chamfer and wherein more chamfers are provided on said first segment than on said second segment.

42. The energy absorption device according to claim 36, wherein at least one of said first and second segments includes at least one chamfer and wherein more chamfers are provided on said first segment than on said second segment.

43. The energy absorption device according to claim 1, wherein said main profile and an intermediate profile are shaped of sheet metal and/or sheet metal profiles.