Search

CN-116457247-B - Bumper beam and vehicle equipped with the same

CN116457247BCN 116457247 BCN116457247 BCN 116457247BCN-116457247-B

Abstract

The invention relates to a bumper cross beam having a profiled support profile (2) which extends in its longitudinal direction in the transverse direction (y-direction) of the vehicle, said support profile having at least two legs (9) at the end sides and a profile base (10) which connects the two legs (9) and is profiled in the z-direction in a U-shaped manner, and having a widening element (3) which is profiled in the z-direction and is connected to each end of the support profile (2) and by which the support profile (2) is elongated in the longitudinal direction (y-direction), having each widening element (3) having a U-shaped connecting section (11) which has a contact section (12), a mating section (13) which is connected to the contact section (12) and an extension section (14) which is connected to the mating section (13), having a profile base (15) which connects the two legs (16) of the U-shaped profile and being arranged in the contact section (12) and in the contact section (12) with the support profile base (2) in the at least one of the U-shaped sections, the connecting section (11) contacts the leg (9) of the support profile (2) at least in regions by means of the leg (16) of the connecting section in the region of its mating section (13).

Inventors

  • S. Larkin

Assignees

  • 奇昊汽车德国有限责任公司

Dates

Publication Date
20260512
Application Date
20211008
Priority Date
20201029

Claims (15)

  1. 1. A bumper beam has -A profiled support profile (2, 2.1, 2.2) extending in the longitudinal direction thereof in the transverse direction of the vehicle, i.e. in the y-direction, said support profile having sections which are profiled U-shaped in the z-direction at least at the end sides by two legs (9, 9.1) and a profile base (10) connecting the two legs (9, 9.1), and -A widening element (3, 3.1, 3.2) profiled along the z-direction, which widening element is connected to each end of the support profile (2, 2.1) by means of which the support profile is elongated in the longitudinal direction, i.e. the y-direction, Wherein each widening element (3, 3.1, 3.2) has a U-shaped profiled connecting section (11) with an abutment section (12), Wherein the connecting section (11) has a profile base (15, 15.1) which connects the two legs (16, 16.1-16.5) of the U-shaped profile and engages with one of the two U-shaped sections of the support profile (2, 2.1, 2.2) and is arranged overlapping the U-shaped section in the y-direction, Wherein the connecting section (11) is connected to the profile base (10, 10.1) of the support profile (2, 2.1, 2.2) at least in the region of its contact section (12), characterized in that, -Each widening element (3, 3.1, 3.2) has a mating section (13) connected to the abutment section (12) and an extension section (14, 14.1, 14.2) connected to the mating section (13), which mating section provides a mating part for connection to the support profile (2, 2.1, 2.2), and Wherein the connecting section (11) contacts the legs (9, 9.1) of the support profile (2, 2.1, 2.2) at least in regions in the region of its mating section (13) by means of the legs (16, 16.1-16.5) of the connecting section, -Wherein the abutment section (12) is connected to the profile base (10, 10.1) of the support profile (2, 2.1, 2.2) only by its profile base (15, 15.1).
  2. 2. Bumper cross beam according to claim 1, characterized in that the legs (16, 16.1-16.5) of the connecting section (11) are in contact with the inner sides (18) of the legs (9, 9.1) of the support profiles (2, 2.1, 2.2) pointing between the legs (9, 9.1) by the outer sides (17) of the legs pointing away from the legs (16, 16.1-16.5), respectively, in the region of the mating section (12) of the connecting section, and the outer sides of the profile bottoms (15, 15.1) of the connecting section (11) pointing towards the profile bottoms (10, 10.1) of the support profiles (2, 2.1, 2.2) are connected by the abutment sections (12) of the connecting section to the profile bottoms (10, 10.1) of the support profiles (2, 2.1, 2.2).
  3. 3. Bumper beam according to claim 2, characterized in that the connecting section (11) is also connected in the mating section (13) of the connecting section with the profile base (10, 10.1) of the support profile (2, 2.1, 2.2) by means of the profile base (15, 15.1) of the connecting section.
  4. 4. A bumper beam according to claim 2 or 3, characterized in that the legs (16, 16.2-16.5) of the connecting section (11) which are inserted into the U-shaped profiled section of the support profile (2, 2.1, 2.2) are spaced apart from the legs (9, 9.1) of the support profile (2, 2.1, 2.2) at least until they adjoin a transition region which transitions into the profile base (15, 15.1).
  5. 5. A bumper beam according to one of claims 1 to 3, characterized in that the connecting section (11) has, in the region of its abutment section (12), a slot-like recess (30) following the longitudinal extension of the connecting section, i.e. the y-direction.
  6. 6. Bumper beam according to claim 5, characterized in that the abutment section (12) is welded in its recess (30) to the profile base (10, 10.1) of the support profile (2, 2.1, 2.2).
  7. 7. A bumper beam according to one of claims 1 to 3, characterized in that the abutment section (12) is welded by its free end face to the profile base (10, 10.1) of the support profile (2, 2.1, 2.2).
  8. 8. A bumper beam according to one of claims 1 to 3, characterized in that the support profile (2) is designed as a cap-shaped profile, the legs (16) of the U-shaped profiled connecting section (11) of the widening element (3) extend to the plane of the flange protruding relative to the U-shaped profiled section of the support profile (2), and the support profile (2) is closed by a closing plate (7), wherein the closing plate (7) engages with the flange of the support profile (2) and engages at least in sections with the legs (16) of the widening element (3).
  9. 9. A bumper beam according to one of claims 1 to 3, characterized in that the widening element (3.1, 3.2) has a greater foot height in its extension section (14.1, 14.2) in the design of the U-shaped profile of the widening element, at least in the foot section, than in the mating section (13) of the widening element, wherein the height of the foot (16.2-16.5) in this foot section of the widening element (3.1, 3.2) is aligned with the end of the support profile (2.1, 2.2) on its open profile side.
  10. 10. Bumper beam according to claim 9, characterized in that projections (27, 27.1-27.5) extending the height of the feet are formed on the foot sections aligned with the ends of the support profiles (2.1, 2.2) on the open profile side thereof, which projections lie laterally next to the closing plate sections between the projections or engage into through holes (32) of the closing plates (7.1, 7.2) corresponding to the geometry of the projections.
  11. 11. A bumper beam according to one of claims 1 to 3, characterized in that an additional extension element (4) is arranged on the side of the widening element (3, 3.1) pointing away from the support profile (2, 2.1).
  12. 12. A bumper beam according to one of claims 1 to 3, characterized in that the extension section (14.2) has two support arms (28, 28.1) which are arranged spaced apart from one another in the height direction, i.e. the z-direction, and which extend from the side feet (16.4, 16.5) in the longitudinal direction and away from the support profile (2.2).
  13. 13. A bumper beam according to one of claims 1 to 3, characterized in that two crash boxes (5) spaced apart from one another in the y-direction are connected to the support profile (2, 2.1, 2.2), and that the abutment section (12) of each widening element (3, 3.1, 3.2) is arranged overlapping the end face (25) of the crash box (5) at least in sections.
  14. 14. A bumper beam according to one of claims 1 to 3, characterized in that the widening element (3) has a predetermined bending position in the region of the extension section (14) which, when a predetermined holding force is exceeded, enables a bending movement of the outer component in the y-direction relative to the inner component about a bending axis oriented in the height direction, i.e. the z-direction.
  15. 15. Vehicle with at least one bumper beam (1) according to one of claims 1 to 14.

Description

Bumper beam and vehicle equipped with the same Technical Field The invention relates to a bumper beam having A profiled support profile extending in its longitudinal direction in the transverse direction (y-direction) of the vehicle, with a section which is profiled at least at the end side by two legs and a profile base connecting the two legs in a U-shape in the z-direction, and -A widening element profiled along the z-direction, which widening element is connected to each end of the support profile, by means of which widening element the support profile is elongated along the longitudinal direction (y-direction). Wherein each widening element has a U-shaped profiled connecting section with an abutment section, Wherein the connecting section has a profile bottom which connects the two legs of the U-shaped profile and engages with one of the two U-shaped sections of the support profile and is arranged overlapping the U-shaped section in the y-direction, and Wherein the connecting section is connected to the profile base of the support profile at least in the region of its contact section. Furthermore, a vehicle equipped with at least one such bumper beam is described. Background A bumper beam is known from the general publication US 9 902 349 B2, which is provided with an extension at its end and a V-shaped holding means which is supported on the crash box and on the section of the extension. Another bumper beam is known from DE 10 2017 222 081 A1. In this prior art, the beam widening element is in abutment with the end of the support profile and is designed to lengthen the profiled contour of the support profile. The disclosed bumper beam makes it possible to provide different width bumper beams for different motor vehicles using the support profile as a common component. In this connection, such a bumper beam is constructed modularly together with its widening elements which are designed for different applications. The widening element has, in the transverse direction (y-direction) of the vehicle, a web as a profile projection for connection to the support profile, in particular a web for the middle part of the connection to the support profile and an upper web and a lower web for the connection of the widening element to a crash box arranged on the support profile. The connecting system enables the beam widening element to be assembled with the support profile simply and quickly. The disadvantage of such a bumper beam is that the connection between the beam and the support profile is not sufficiently stable, especially in the event of high loads, such as high-speed collisions, and that the beam widening element may break away from the support profile, thereby increasing both the damage to the vehicle and the risk of injury to personnel in the vehicle. It is also desirable to reduce the restrictions in designing the widening element. Disclosure of Invention The object of the present invention is therefore to develop a bumper beam of the type mentioned in the opening paragraph such that it meets the requirements of different vehicle designs by using different widening elements and also increases the design freedom in adapting to different vehicles and crash situations. According to the invention, the object is achieved by a bumper beam of the type mentioned in the opening paragraph, in that, Each widening element has a mating section connected to the abutment section and an extension section connected to the mating section, and In this case, the connecting section contacts the leg of the support profile at least in regions by its leg in the region of its mating section. An advantageous development of the invention is given in the following description. All the described features are here in principle the solution of the invention alone or in any combination, irrespective of the relation of these features and of the references in the claims. The directions used in the context of these embodiments are the x-direction, the y-direction and the z-direction, which correspond to the directions normally used in vehicles. The x-direction corresponds to the longitudinal extension of the vehicle, the y-direction corresponds to the transverse direction of the vehicle and the z-direction corresponds to the direction of the vertical axis. In the bumper beam, the connection between the widening element and the support profile is realized as a profile-in-profile-L-i sung, wherein the connection section is arranged with its abutment section and mating section overlapping and engaging with the profiled section in the end region of the support profile. Due to the high stability of the connection, the extension sections actually provided for extending the support profile can be designed very individually in terms of geometry, mechanical strength or material. It should be noted that the widening element is usually designed as one piece. The widening element may also consist of several components. The corresponding profile sec