Bumper beam and vehicle equipped with the same

Abstract

The present invention relates to a bumper beam having - an irregularly shaped support profile (2) extending longitudinally along the vehicle's transverse (y-direction), the support profile having a U-shaped section along the z-direction at least at its end sides via two side feet (9) and a profile bottom (10) connecting the two side feet (9), and - a widening element (3) irregularly shaped along the z-direction, the widening element being connected to each end of the support profile (2) and extending the support profile (2) longitudinally (y-direction) via the widening element, - wherein each widening element (3) has a U-shaped connecting section (11) having an abutment section (12) connected to the abutment section (12). The connecting section (11) has a mating section (13) and an extension section (14) connected to the mating section (13), wherein the connecting section (11) has a profile bottom (15) connecting two edges (16) of the U-shaped profile and is fitted with one of the two U-shaped sections of the supporting profile (2) and is arranged to overlap with the U-shaped section along the y direction, wherein the connecting section (11) is connected to the profile bottom (10) of the supporting profile (2) at least in the region of its abutting section (12), and wherein the connecting section (11) contacts the edge (9) of the supporting profile (2) at least regionally through the edge (16) of the connecting section in the region of its mating section (13).

Description

Technical Field

[0001] This invention relates to a bumper beam having

[0002] - A specially shaped support profile extending longitudinally along the vehicle's transverse (y-direction), the support profile having at least a U-shaped section along the z-direction at its end sides via two legs and the bottom of the profile connecting these two legs, and

[0003] - A widening element that is irregularly shaped along the z-direction is connected to each end of the support profile, and the support profile is extended longitudinally (y-direction) by the widening element.

[0004] - Each widened element has a U-shaped, irregularly shaped connection section, and the connection section has an abutment section.

[0005] - The connecting section has the bottom of the profile at the two edges of the U-shaped irregular part, and is fitted into one of the two U-shaped sections of the supporting profile, and is arranged to overlap with the U-shaped section along the y-direction.

[0006] - Wherein, the connecting section is connected to the bottom of the supporting profile at least in the area of ​​its abutting section.

[0007] Furthermore, a vehicle equipped with at least one such bumper crossbeam is described. Background Technology

[0008] A bumper beam is known from general publication US 9 902 349 B2, which has an extension at its end and a V-shaped retaining device supported on the section of the collision box and the extension.

[0009] Another type of bumper beam is known from DE 10 2017 222 081 A1. In this prior art, the beam widening element abuts at the end of the support profile and is designed to extend the irregular profile of the support profile. The disclosed bumper beam allows for the provision of bumper beams of different widths for different motor vehicles while using the support profile as a common component. In this regard, such a bumper beam, along with its widening element designed for different applications, is modularly constructed. The widening element has connecting plates as profile protrusions along the vehicle's transverse (y-direction) for connection to the support profile, specifically a middle connecting plate for connection to the support profile and upper and lower connecting plates for connecting the widening element to a collision box arranged on the support profile. This connection system allows for simple and quick assembly of the beam widening element to the support profile. The disadvantage of this type of bumper beam is that, especially under high loads such as high-speed collisions, the connection between the beam and the supporting profile is not stable enough, and the beam widening element may break off from the supporting profile. This significantly increases both the damage to the vehicle and the risk of injury to the occupants. It is also desirable to reduce the constraints when designing widening elements. Summary of the Invention

[0010] Therefore, the technical problem to be solved by the present invention is to improve the type of bumper beam described at the beginning, so that it can meet the requirements of different vehicle designs by using different widening elements, and also increase the degree of design freedom while adapting to different vehicles and collision situations.

[0011] According to the present invention, the aforementioned technical problem is solved by a bumper beam of the type described in the present invention, as mentioned at the beginning, wherein...

[0012] - Each widening element has a mating section connected to the abutment section and an extension section connected to the mating section, and

[0013] - Wherein, the connecting section contacts the edge of the supporting profile at least regionally through its edge in the area of ​​its mating section.

[0014] Advantageous extensions of the invention are given in the following description. All features described herein are, in principle, individually or in any combination, technical solutions of the invention, regardless of their relationship to these features or their reference in the claims.

[0015] The directions used in these design schemes—x, y, and z—correspond to those typically used in vehicles. Here, the x-direction corresponds to the vehicle's longitudinal extension, the y-direction to the vehicle's lateral extension, and the z-direction to the direction perpendicular to the axis.

[0016] In this bumper beam, the connection between the widening element and the supporting profile is achieved as a profile-in-profile solution (Profil-in-Profil-Lösung). The connecting section overlaps and engages with a shaped section in the end region of the supporting profile via its abutment and mating sections. Due to the high stability of the connection, the extension section used to extend the supporting profile can be designed in a highly customized manner in terms of geometry, mechanical strength, or materials. It should be noted that the widening element is typically designed as a single piece. However, the widening element can also be composed of multiple components.

[0017] The corresponding profile sections are inserted into each other through a profile-in-profile connection between the support profile and the widening element. Therefore, the connection of the widening element to the support profile does not require consideration of the arrangement of other elements. Compared to the prior art described at the beginning, this alone significantly increases the design freedom of the widening element. The connecting section can be arranged outside the U-shaped portion of the support profile, or inside relative to the support profile. This possibility reduces the design freedom of the widening element compared to previously known designs. In one embodiment, the edges of the connecting section contact the inner sides of the edges of the support profile located between the edges in the mating section area via the outer side of the edge pointing away from the edge, and the outer side of the bottom of the connecting section profile, away from the edge of the connecting section, is connected, typically welded, to the inner side of the bottom of the support profile profile at least in the area of ​​the abutment section. In this design, the connection section of the widened element is located within the irregular section of the supporting profile. This utilizes the existing cavity within the supporting profile, eliminating the need for additional installation space to connect the widened element.

[0018] The U-shaped connecting section of the widening element includes an abutment section and a mating section. The mating section is designed in its U-shaped portion and therefore in the span and orientation of its edges such that the edges contact the edges of the U-shaped end section of the supporting profile. Thus, the mating section provides a fit for connection to the supporting profile. The abutment section, which is typically much longer than the mating section and extends along the y-direction, only needs to connect its profile bottom to the profile bottom of the supporting profile. For this reason, the widening element can be fixed to the supporting profile via its connecting section by two-point fixing (Zwei-Punkt-Befestigung), wherein the two fixing points can be spaced far apart along the y-direction, specifically corresponding to the length of the connecting section along the y-direction. The first fixing point can, for example, be located on the free end side of the profile bottom of the abutment section, at which the widening element is typically connected to the profile bottom of the supporting profile by welding. The second fixing point is achieved through the fit provided by the mating section, and only needs to be fixed in the opposite direction of the widening element through its connecting section to the supporting profile. This fixing is usually also achieved by welding, which can be done by spot welding in multiple locations.

[0019] This design allows the connection section of the widened component to be designed so that it rests against the support profile with only a relatively small contact area. In the area of ​​the contact section, the reinforcing edges of the connection section do not necessarily need to rest against the supports of the beam profile. The smaller the contact area between the two components, the lower the risk of corrosion between them. If the edges of the contact section are spaced apart from the edges of the support profile, then an anti-corrosion protective layer, for example, applied by cathodic impregnation, can also reach the mutually facing sides of the edges of the two U-shaped components.

[0020] In one design, the connecting section of the widening element is located within the U-shaped profile of the supporting profile at its end section. In this design, the abutting section is designed to overlap with the end side of the collision box, which is connected to the supporting profile on the rear side. In this way, the forces acting on the bumper beam in the external area can be at least proportionally distributed into the collision box at the end side or front by the widening element.

[0021] This connection of the widening element to the support profile allows for almost arbitrary design of the actual extension section. In many cases, the U-shaped portion of the connecting section extends into the extension section. Therefore, the extension section can also extend the shaped portion of the support profile along the y-direction, if desired. However, the extension section can be used to extend the support profile along the y-direction with other cross-sectional geometries. The extension dimension of the extension section along the z-direction can, for example, exceed the extension dimension of the support profile along the z-direction both upwards and downwards, or only upwards or downwards. Furthermore, the extension section can also be differently shaped relative to the support profile along the x-direction if different deformation characteristics are provided in the outer edge region of the bumper beam. The extension element can form the end of the bumper beam by its end pointing away from the support profile along the y-direction. It is also entirely feasible to use this widening element as an intermediate or connecting piece between the support profile and separately manufactured bumper beam end components. The bumper beam end components are typically connected to the widening element by a joining process, but can also be connected to the widening element by a mechanical connector. Adhesive bonding is also feasible.

[0022] The widened element design allows the support profile to extend along the y-direction without having to tolerate weak points as in the prior art. Where desired, this widened element design can have a predetermined bending position, for example, through material weaknesses in the edges of the widened element, or through corresponding cuts or openings in the material. Because the extended section extends along the y-direction, this predetermined bending position can be set at almost any location within that section, not limited to the end of the support profile. Furthermore, the bending axis of this predetermined bending position does not need to extend strictly along the z-direction, although in many cases it does. If the material weaknesses in the two edges, for example, created by recesses, overlap misaligned along the z-direction, then the bending of the outer section of the bumper beam towards the vehicle can also be combined with the component along the z-direction.

[0023] To simplify the assembly of the two components and facilitate the application of the anti-corrosion protective layer, according to the extended design specifications, the connecting section has an elongated recess extending longitudinally (y-direction) along the abutment section in its contact area. This recess is located in the bottom of the profile of the contact section. The elongated recess further reduces the contact area between the two components. Simultaneously, this recess, typically extending along the y-direction, can be used to weld the bottom of the connecting section profile to the bottom of the supporting profile, preferably along at least one longitudinal side of this elongated recess. Furthermore, this recess enables a reduction in the weight of the widened component.

[0024] According to one design, the support profile is designed as a cap-shaped profile, and the edges of the U-shaped connecting section of the widening element extend at least sectionally to the plane of the flange projecting along the z-direction relative to the U-shaped section of the support profile. The support profile is enclosed by a sealing plate. The sealing plate engages with the flange of the support profile and the edges of the widening element in the connecting section of the support profile and / or in the extended section of the widening element. In these sections, a double box-shaped profile is thus provided by the sealing plate, and therefore sections with particularly high bending stiffness are provided.

[0025] The assembly of the closure plate can be simplified by extending the U-shaped legs of the extension section to the closure plate. In this case, the free end of the leg of the widened element protrudes into the plane formed by the flange-like free end of the support profile, so that the free end of the leg abuts against the closure plate and the closure plate can be supported on the free end of the leg. For ease of assembly, the legs of the U-shaped extension section protrude slightly relative to the plane of the outer end of the support profile. These leg extensions can be used to fix the closure plate, which is fitted between two leg extensions by a section, such as a connecting plate. The closure plate contacts the two leg extensions by its connecting plate, which points along the z-direction and is fitted between the leg extensions, and is thus fixed along the z-direction. Leg extensions can also be used such that when the height of the closure plate (the extension dimension along the z-direction) exceeds the distance between the leg extensions, the closure plate has a corresponding through hole into which the leg extension is fitted. In both cases, this method not only secures the enclosed section, but also allows the two components to be joined from the front of the enclosed plate via the side extension.

[0026] To connect additional extension elements, the widening element can have two support arms, which are spaced apart from each other along the height direction (z-direction) and extend longitudinally from the edge and away from the supporting profile. The extension section is typically designed in a similar cap-like shape in cross-section. The support arms can be designed to extend longitudinally beyond the edge of the profile bottom. Additional extension elements can be attached to the support arms. If the support arms are closed at the front by a closure plate, they can also be used without additional extension elements. In this case, the extension of the supporting profile is designed to reduce weight.

[0027] This bumper beam can be optimally adapted to the requirements of various crash tests. It is suitable for both high-speed small overlap tests and the Mobile Progressive Deformable Barrier-Test (MPDB). This adaptation can also be specified in the arrangement and design of predetermined bending positions. These predetermined bending positions, as described above, can be set at material weaknesses in the extended section of the widening element. If the abutment section of the widening element does not overlap with the end of the crash box, a predetermined bending position is also formed at the end of the abutment section of the widening element. High stiffness of the bumper beam within the widening element's region is important to meet these tests. This high stiffness is designed to meet the requirements of relevant crash tests, such as the high-speed small overlap test and the MPDB test. To achieve the precise bending motion required for the bumper beam in a defined section of the widening element in the event of such an accident, according to the extended design of the invention, the widening element has a predetermined bending position as described above, specifically arranged in the region of the extended section, enabling the bending section of the extended section to bend about a predetermined bending axis oriented along the height direction (z-direction). This allows for a very precise and targeted bending motion in the widening element upon collision, causing the widening element to shift along the x-direction, more precisely, about the bending axis oriented along the height direction (z-direction). This allows for controlled bending motion even under high loads, further guiding oncoming vehicles past the vehicle. Attached Figure Description

[0028] The present invention will be further described below with reference to embodiments and the accompanying drawings. In the drawings:

[0029] Figure 1 The first embodiment of the bumper beam is shown in the perspective view.

[0030] Figure 2 The section was shown Figure 1 The vertical section obtained from the mating section of the bumper beam.

[0031] Figure 3 Shown in the horizontal section Figure 1 and Figure 2 The bumper beam in the middle,

[0032] Figure 4 A second embodiment of the bumper beam is shown in the perspective view.

[0033] Figure 5 The section was shown Figure 4 The vertical section obtained from the mating section of the bumper beam.

[0034] Figure 6 A third embodiment of the bumper beam is shown in the perspective view, and

[0035] Figure 7 Shown in the horizontal section Figure 6 The bumper beam in the middle. Detailed Implementation

[0036] Figure 1 A partial area of ​​the bumper beam 1 is shown in the left-pointing end section along the driving direction. In the illustrated embodiment, the bumper beam 1 includes a U-shaped support profile 2, a similarly U-shaped widening element 3, and a shaped extension element 4 connected to the widening element 3. A collision box 5 is connected to the support profile 2 at a distance from its rear end. The collision box 5 has a mounting plate 6 at its vehicle-side connection end for attaching the collision box to the vehicle. A closing plate 7 is used to close the support profile at the front, forming the outer end of the support profile 2. Another end section of the bumper beam 1, not shown in the figure, is designed identically to the end section shown; therefore, the following description also applies to the other end of the bumper beam 1.

[0037] The support profile 2 is shaped like a cap along its entire longitudinal length in cross-section, and therefore also in its end sections, so that, in addition to its already mentioned U-shaped profile, the support profile also has a flange protruding from the edges along the z-direction. A closing plate 7 is attached to this flange. The U-shaped profile of the support profile 2 includes two edges 9, 9.1 and a profile bottom 10 connecting the two edges 9, 9.1. A widening element 3 is inserted through a connecting section 11 and thus fitted into the end section 8 of the support profile 2.

[0038] The connecting section 11 of the widening element 3 includes an abutment section 12 and a mating section 13 connected to the abutment section 12. An extension section 14 is connected to the connecting section 11. The connecting section 11 is arranged to overlap with the end section 8 of the support profile 2 via its support section 12 and mating section 13, while the extension section 14 protrudes from the free end of the end section 8 of the support profile 2 along the longitudinal direction (y-direction) of the support profile 2. The extension section 14 extends the longitudinal extension dimension of the support profile 2, thereby widening the bumper beam 1. The widening element 3 is substantially U-shaped in cross-section and has two legs 16, 16.1 and a profile bottom 15 connecting the two legs 16, 16.1. In the region of the abutment section 12, the widening element 3 is designed to be narrower along the height direction (z-direction) than the mating section 13 and the extension section 14. In the region of the extended section 14, the widened element 3 is shaped like a cap by providing flanges formed along the z-direction to the free ends 24 of the edges 16, 16.1. The front sides of these flanges are aligned with the flanges of the cap-shaped portion of the supporting profile 2.

[0039] The span of the feet 9, 9.1 of the widening element 3 in the area of ​​its abutment section 12 is smaller than that of the mating section 13 arranged adjacent to the widening element. The transition between the widths of the two feet is provided by a transition section 20 designed as a bend. Figure 1 The view shows that, to compensate for tolerances, the widening element 3 can be configured in terms of the depth (along the y-direction) of its extension into the irregular portion of the support profile 2, because the mating section 13 transitions into the extension section 14 without changing the span of the edges 16, 16.1. Also relevantly, see also... Figure 2 The view of the section. The line of sight of the section is directed toward the supporting profile 2.

[0040] The profile bottom 15 of the abutment section 12 and the mating section 13 abuts against the inner side 22 of the profile bottom 10 of the supporting profile 2 with its outer side 21. In the region of the abutment section 12, the profile bottoms 10 and 15 are welded to each other (not shown). The collision box 5 is also welded to the supporting profile 2 (indicated by weld 29), and the collision box has a recess on its end side facing the supporting profile 2 that corresponds to the U-shaped irregular portion.

[0041] In addition, by Figure 2 It is known that the free end 23 of the flange of the support profile 2, which bends from the edges 9 and 9.1, is connected to the sealing plate 7 by a weld. In the illustrated embodiment, the free end 24 of the edges 16 and 16.1 does not protrude onto the sealing plate 7 in the area of ​​the connecting section 11.

[0042] The widening element 3 of the illustrated embodiment has a material opening 31, which is formed in the oppositely positioned edges 16, 16.1 in the region of the extension section 14 of the widening element (see...). Figure 1 Two opposing material openings 31 aligned with each other along the z-direction form a bending axis (not shown) extending along the height direction (z-direction). If the force acting on the outside of the bumper beam 1 in the region of the material openings 31 exceeds the provided holding torque, the widening element extends the element 4 by bending it around the bending axis formed by the material openings 31 toward the collision box 5. Figure 3 Material opening 31 can be seen in the longitudinal section view of the section shown. This view shows a horizontal section of the bumper beam 1. It can be clearly seen that, in the embodiment shown, the abutment section 12 of the widening element 3 extends longitudinally (y-direction) to the front of the end side 25 of the crash box 5 and overlaps with the crash box. The abutment section 12 does not completely overlap with the end side 25 here, but in the illustrated embodiment, it only overlaps about 30% of the y-direction extension dimension of the crash box 5.

[0043] In the region of extended section 14, the widening element 3 is designed in a cap-like shape in cross-section as described above (see [link]). Figure 2 Thus, the free ends 24 of the edges 16, 16.1 exist as flanges extending along the z-direction in the region of the extended section 14, and the closing plate 7 is welded to the flange. Figure 3 It is known that the closing plate 7 does not contact the free ends 24 of the edges 16, 16.1 of the widening element 3 in the areas of the abutment section 12 and the mating section 13, but only in the area of ​​the extension section 14. The closing plate 7 has a connecting plate 26 at its free end pointing in the y-direction, which overlaps with the extension element 4. This overlapping area of ​​the extension element 4 is slightly shifted back relative to its end extending toward the free end of the bumper beam 1, specifically shifted back by the material thickness of the closing plate 7, so that the outer side of the closing plate 7 is aligned with the front side of the extension element 4 (see...). Figure 3 ).

[0044] Figure 4 A second embodiment of the bumper beam 1.1 is shown. This embodiment, and... Figure 5 and Figure 6 The embodiments shown are largely similar in design to Figures 1 to 3 The embodiment corresponds to the bumper beam 1, and differs from it in the design of the extended section 14.1 of the widening element 3.1. Figure 4In the illustrated embodiment, the extension section 14.1 does not have a cap-shaped irregular portion in cross-section, and therefore does not have a flange-like free end at the foot. Instead, protrusions 27 and 27.1 are arranged on the free ends of the feet 16.2 and 16.3, extending the height of the feet 16.2 and 16.3. These protrusions 27 and 27.1 serve to secure the closing plate 7.1, which has through holes 32 at corresponding locations.

[0045] This allows for precise positioning of the closure plate by inserting the protrusion 27 into the through hole 32, thus facilitating the assembly of the closure plate 7.1. The closure plate 7.1 is welded to the protrusions 27, 27.1 from the front side of the bumper beam 1 in the area where the protrusions 27, 27.1 are inserted through the through hole 32. Figure 5 The cross section of the bumper beam 1.1, cut through its abutment section and viewed toward the extended section 14.1, is shown.

[0046] Figure 6 A third embodiment of the bumper beam 1.2 is shown. The bumper beam is similar in its basic structural construction to... Figure 4 and Figure 5 The embodiment corresponds to this. The difference between this bumper beam 1.2 and the bumper beam 1.1 lies in the design of the extension section 14.2 of its widening element 3.2. No additional extension element is provided in the bumper beam 1.2. Additional extension is provided by support arms 28, 28.1 extending the edges 16.4, 16.5. These support arms 28, 28.1 extend the edges 16.4, 16.5 along the y-direction. In the area of ​​the support arms 28, 28.1, the widening element 3.2 does not have a profile bottom. In addition to the protrusions 27.2, 27.3 of the extension section 14.2 that extend the edges, protrusions 27.4, 27.5 for extending the height of the support arms are also formed on the support arms 28, 28.1. The closure plate 7.2 has a connecting plate 26.1 that extends relative to the connecting plate 26 of the bumper beam 1.1. The width of protrusion 26.1 extending along the height direction (z-direction) in the installation position corresponds to the distance between protrusions 27.2, 27.3 or 27.4, 27.5 along the z-direction. The closing plate 7.2 is fixed between the protrusions by fitting the connecting plate 26.1 between these protrusions 27.2, 27.3 or 27.4, 27.5. The root of the connecting plate 26.1 abuts against the ends of the protrusions 27.2, 27.3 pointing towards the supporting profile 2.2.

[0047] Figure 7 Shown in the horizontal section Figure 6 Examples are shown in the text.

[0048] In all embodiments, the connection between the support profiles 2, 2.1, 2.2 and the corresponding widening elements 3, 3.1, 3.2 is achieved, on the one hand, through corresponding mating sections 13, in which the edges 16, 16.1, 16.2, 16.3 of the widening elements 3, 3.1, 3.2 abut against the edges 9, 9.1 of the support profiles 2, 2.1, 2.2 in the area of ​​the mating section 13. This abutment can be achieved with a certain preload, thereby clamping the mating section 13 into the irregular portion of the support profiles 2, 2.1, 2.2. In this area, the ends of the profile bottoms 10, 10.1 of the support profiles 2, 2.1, 2.2 are preferably welded to the profile bottoms 15, 15.1 of the widening elements 3, 3.1, 3.2. This constitutes a first connection position between the corresponding widening elements 3, 3.1, 3.2 and the support profiles 2, 2.1, 2.2.

[0049] In all the exemplary embodiments, the second connection position between the support profiles 2, 2.1, 2.2 and the widening elements 3, 3.1, 3.2 is located between the corresponding abutment sections 12 of the support profiles 2, 2.1, 2.2 and the profile bottoms 15, 15.1. In all embodiments, the connection is designed as a welded connection. Furthermore, all embodiments have an elongated recess 30 in the region of the abutment section 12 of the widening elements 3, 3.1, 3.2 (see...). Figure 1 In all embodiments, welding is performed between the abutment section 12 and the profile bases 10, 10.1 of the supporting profiles 2, 2.1, 2.2 in the region of the recess 30 and at the end of the profile bottom 15 of the connecting section 11.

[0050] In an embodiment not shown in the accompanying drawings, the bottom of the connecting section's profile bends towards the bottom of the supporting profile at the end pointing toward the supporting profile, and the bend's protrusion engages with a pre-prepared recess on the bottom of the supporting profile. This measure achieves fixation of the widening element relative to the supporting profile. This design can be used if tolerance compensation is not required along the y-direction.

[0051] The invention has been described with reference to embodiments. Many other possibilities for implementation will be apparent to those skilled in the art without departing from the scope of the effective claims, and these will not be specifically set forth within the scope of this description.

[0052] List of reference numerals

[0053] 1.1.1.1.2 Bumper crossbeam

[0054] 2.2.1.2.2 Supporting profiles

[0055] 3.1 and 3.2 Widened components

[0056] 4 extension elements

[0057] 5 collision boxes

[0058] 6 mounting plates

[0059] 7.1 and 7.2 sealing panels

[0060] 8-end side region

[0061] 9.1 Side Feet

[0062] 10, 10.1 Bottom of profile

[0063] 11 connecting sections

[0064] 12 adjacent sections

[0065] 13 Coordination Section

[0066] Sections 14, 14.1, and 14.2 extended

[0067] 15, 15.1 Bottom of profile

[0068] 16.1, 16.2, 16.3, 16.4, 16.5 edge feet

[0069] 17. Widen the outer edge of the component's lead.

[0070] 18. Inner side of the edge of the supporting profile

[0071] 19 distance

[0072] 20 transition sections

[0073] 21. Outer side of the bottom of the profile of the connecting element

[0074] 22. Inner side of the bottom of the supporting profile

[0075] 12 Free ends of support profiles

[0076] 24 free ends

[0077] 25 Collision Box End Side

[0078] 26, 26.1 Connection plate of the sealing plate

[0079] 27.1, 27.2, 27.3, 27.4, 27.5 Protrusions

[0080] 28, 28.1 Support arm

[0081] 29 welds

[0082] 30 recesses

[0083] 31 Material Opening

[0084] 32 through holes

Claims

1. A bumper crossbeam, having - A specially shaped support profile (2, 2.1, 2.2) extending longitudinally along the vehicle's transverse direction, i.e., the y-direction, the support profile having a U-shaped section at least at the end sides via two side feet (9, 9.1) and a profile bottom (10) connecting the two side feet (9, 9.1) along the z-direction, and - Widening elements (3, 3.1, 3.2) that are irregularly shaped along the z-direction, said widening elements being connected to each end of said support profile (2, 2.1), extending said support profile along the longitudinal direction, i.e., the y-direction, through said widening elements. - in, Each widening element (3, 3.1, 3.2) has a U-shaped, irregularly shaped connecting section (11), which has an abutment section (12). - Wherein, the connecting section (11) has the profile bottom (15, 15.1) of the two edges (16, 16.1-16.5) of the connecting U-shaped irregular part, and is fitted with one of the two U-shaped sections of the supporting profile (2, 2.1, 2.2), and is arranged to overlap with the U-shaped section along the y direction. - Wherein, the connecting section (11) is connected to the profile bottom (10, 10.1) of the supporting profile (2, 2.1, 2.2) at least in the region of its abutting 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), the mating section providing a mating portion for connection to the support profile (2, 2.1, 2.2), and - Wherein, the connecting section (11) at least regionally contacts the edges (9, 9.1) of the supporting profile (2, 2.1, 2.2) through the edges (16, 16.1-16.5) of the connecting section in the region of its mating section (13). - Wherein, the abutting section (12) is connected to the bottom of the supporting profile (2, 2.1, 2.2) (10, 10.1) only through its bottom profile (15, 15.1).

2. The bumper beam according to claim 1, characterized in that, The edges (16, 16.1-16.5) of the connecting section (11) respectively contact the outer side (17) of the edge away from the edge (16, 16.1-16.5) of the connecting section and the inner side (18) of the edge (9, 9.1) of the supporting profile (2, 2.1, 2.2) that points to each other between the edges (9, 9.1) in the mating section (12) of the connecting section (11). The outer side of the profile bottom (15, 15.1) of the connecting section (11) pointing towards the profile bottom (10, 10.1) of the supporting profile (2, 2.1, 2.2) is connected to the profile bottom (10, 10.1) of the supporting profile (2, 2.1, 2.2) through the abutting section (12) of the connecting section.

3. The bumper beam according to claim 2, characterized in that, The connecting section (11) is also connected to the bottom of the supporting profile (2, 2.1, 2.2) (10, 10.1) via the bottom of the profile (15, 15.1) of the connecting section in the mating section (13).

4. The bumper beam according to claim 2 or 3, characterized in that, The edges (16, 16.2-16.5) of the abutting section (12) of the connecting section (11) embedded in the U-shaped irregular part of the supporting profile (2, 2.1, 2.2) are spaced apart from the edges (9, 9.1) of the supporting profile (2, 2.1, 2.2), at least until they are adjacent to the transition area that transitions to the bottom (15, 15.1) of the profile.

5. The bumper beam according to any one of claims 1 to 3, characterized in that, The connecting section (11) has an elongated recess (30) in the region of its abutting section (12) that follows the longitudinal extension dimension of the connecting section, i.e., the y-direction.

6. The bumper beam according to claim 5, characterized in that, The abutment section (12) is welded in its recess (30) to the bottom (10, 10.1) of the support profile (2, 2.1, 2.2).

7. The bumper beam according to any one of claims 1 to 3, characterized in that, The abutment section (12) is welded to the bottom (10, 10.1) of the support profile (2, 2.1, 2.2) through its free end face.

8. The bumper beam according to any one of claims 1 to 3, characterized in that, The support profile (2) is designed as a cap-shaped profile, and the edge (16) of the U-shaped connecting section (11) of the widening element (3) extends to the plane of the flange protruding relative to the U-shaped 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 at least partially engages with the edge (16) of the widening element (3).

9. The bumper beam according to any one of claims 1 to 3, characterized in that, The widening element (3.1, 3.2) has a greater foot height in its extended section (14.1, 14.2) in terms of the design of the U-shaped portion 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 the 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. The bumper beam according to claim 9, characterized in that, On the foot section aligned with the end of the open profile side of the support profile (2.1, 2.2), protrusions (27, 27.1-27.5) are formed to extend the height of the foot section. The protrusions are laterally close to the closed plate section located between the protrusions or embedded in the through hole (32) of the closed plate (7.1, 7.2) corresponding to the geometry of the protrusions.

11. The bumper beam according to any 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) away from the side to which the supporting profile (2, 2.1) points.

12. The bumper beam according to any one of claims 1 to 3, characterized in that, The extension section (14.2) has two support arms (28, 28.1) that are spaced apart from each other along the height direction, i.e. the z direction, and extend longitudinally from the foot (16.4, 16.5) and away from the support profile (2.2).

13. The bumper beam according to any one of claims 1 to 3, characterized in that, Two collision boxes (5) spaced apart from each other along the y direction are connected to the support profile (2, 2.1, 2.2), and the abutment section (12) of each widening element (3, 3.1, 3.2) is arranged to overlap the end side (25) of the collision box (5) at least sectionally.

14. The bumper beam according to any one of claims 1 to 3, characterized in that, The widening element (3) has a predetermined bending position in the region of the extended section (14), which, when a preset holding force is exceeded, allows the outer component along the y direction to bend relative to the inner component around a bending axis oriented along the height direction, i.e., the z direction.

15. A vehicle having at least one bumper beam (1) according to any one of claims 1 to 14.

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