BUMPER CROSSMEMBER, AND VEHICLE REAR ARRANGEMENT WITH BUMPER CROSSMEMBER

Abstract

A bumper crossmember for a vehicle, with a hollow profile body which has a vehicle frame-side proximal vertical wall and a distal vertical wall which are connected to one another by way of transverse walls and extend along a vertical direction. The transverse walls laterally delimit hollow chambers which are arranged in the hollow profile body. The center longitudinal direction of the hollow chambers are oriented in each case along the vertical direction, and the hollow chambers are open on the end side.

Claims

1. A bumper crossmember for a vehicle comprising: a hollow profile body having a vehicle frame-side proximal vertical wall and a distal vertical wall which extend along a vertical direction and are connected to one another by way of transverse walls, wherein the transverse walls laterally delimit hollow chambers in the hollow profile body, wherein a center longitudinal direction of each hollow chamber is oriented along the vertical direction, and wherein ends of each hollow chambers are open.

2. The bumper crossmember as claimed in claim 1, wherein, as viewed in a longitudinal direction, a cross section of the hollow profile body is larger in a middle region than at longitudinal ends of the hollow profile body.

3. The bumper crossmember as claimed in claim 1, wherein the hollow profile body is cambered at least in sections along a longitudinal direction of the hollow profile body.

4. The bumper crossmember as claimed in claim 1, wherein the hollow profile body is an extrusion profile.

5. The bumper crossmember as claimed in claim 1, wherein the hollow profile body is formed from two profile halves which are symmetrical and are connected to one another along a parting plane.

6. The bumper crossmember as claimed in claim 5, wherein the profile halves are screwed, welded, riveted or adhesively bonded to one another on the parting plane.

7. The bumper crossmember as claimed in claim 5, wherein, on the parting plane, the profile halves have a pronged structure, via which the profile halves are either configured to be connected or are connected to one another in a positively locking manner.

8. The bumper crossmember as claimed in claim 5, wherein the profile halves are secured to one another against a relative movement along the vertical direction.

9. The bumper crossmember as claimed in claim 1, wherein, as viewed in a longitudinal direction of the hollow profile body, the hollow profile body is cambered in a middle section thereof.

10. A vehicle rear arrangement comprising: the bumper crossmember as claimed in claim 1, an air duct that is formed by a duct body and extends from an inlet opening, through an air-cooled cooling unit that is incorporated into the air duct and to an outlet opening, the bumper crossmember being arranged at least partially in the duct body, such that the air duct is routed through a plurality of hollow chambers disposed in the hollow profile body of the bumper crossmember.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Further advantageous refinements result from the following description and the drawing, in which:

[0022] FIG. 1 diagrammatically shows a vehicle rear arrangement with a bumper crossmember and an air duct,

[0023] FIG. 2 diagrammatically shows a longitudinal section through the vehicle rear arrangement from FIG. 1,

[0024] FIG. 3 diagrammatically shows a perspective view of the hollow profile body of the bumper crossmember, and

[0025] FIG. 4 diagrammatically shows the pronged structure on the parting plane of the profile halves of the hollow profile body.

DETAILED DESCRIPTION OF THE INVENTION

[0026] FIG. 1 diagrammatically shows a vehicle rear arrangement 100, with a vehicle rear trim body 102, a bumper crossmember 10 with a hollow profile body 12 and an air duct 106 which is formed by a duct body 104 and extends from an inlet opening 108 on the vehicle upper side to an outlet opening 110 on the vehicle rear trim body 102.

[0027] The vehicle rear arrangement 100 has a second air duct 114 which is routed through a duct body 112, with the result that two air ducts 106, 114 which are parallel to one another and are arranged symmetrically with respect to the center longitudinal axis of the vehicle are provided, which air ducts 106, 114 are routed in each case through a duct body 104, 112 and open from an inlet opening 108, 115 into an outlet opening 110, 116.

[0028] FIG. 2 shows a longitudinal section through the vehicle rear arrangement 100 in the region of the air duct 106. The air duct 106 which is formed by way of the duct body 104 extends from the inlet opening 108 through an air-cooled cooling unit 118 which is incorporated into the air duct 106 and is configured in the example as an intercooler, to the outlet opening 110. The bumper crossmember 10 is arranged at least partially in the duct body 104, with the result that the air duct 106 is routed through a plurality of chambers 26 of the hollow profile body 12 of the bumper crossmember 10. In this way, air which is conducted in the air duct 106 (for example, outgoing air of the cooling unit 118) can flow through chambers 26 of the hollow profile body 12 (air flow illustrated by way of a plurality of arrows). The center longitudinal direction of the chambers 26 of the bumper crossmember 10 correspond substantially to the throughflow direction of the air duct 106.

[0029] FIG. 3 diagrammatically shows the bumper crossmember 10 in a perspective view. The bumper crossmember 10 extends along a longitudinal direction 14 (profile length) which, in the assembled state, is oriented substantially parallel to the transverse axis of the vehicle (y-axis). The bumper crossmember 10 extends along a vertical direction 16 (profile height) which, in the assembled state, is oriented substantially parallel to the vertical axis of the vehicle (z-axis). In addition, the bumper crossmember 10 extends along a thickness direction 18 (profile thickness) which, in the assembled state, is oriented substantially parallel to the longitudinal axis of the vehicle (x-axis).

[0030] The bumper crossmember 10 has a hollow profile body 12 which has a vehicle frame-side proximal vertical wall 20 and a distal vertical wall 22 which are connected to one another by way of transverse walls 24 (provided merely once with designations) and extend along the vertical direction 16. The transverse walls 24 laterally (that is to say, toward the sides) delimit hollow chambers 26 which are arranged in the hollow profile body 12 (and are provided merely once with designations), the center longitudinal direction of the hollow chambers 26 being oriented in each case along the vertical direction 16, and the hollow chambers 26 being open on the end side, that is to say toward the top and toward the bottom.

[0031] The hollow profile body 12 has a greater cross section (greater profile thickness) in a middle region 28 along its longitudinal direction 14 than at its ends. The hollow profile body 12 is cambered at least in sections along its longitudinal direction 14, in the example in a middle region 28 along its longitudinal direction 14.

[0032] The hollow profile body 12 is configured in the example as an extrusion profile, for example as an extruded aluminum profile.

[0033] A single-piece configuration of the hollow profile body 12 is fundamentally conceivable (not shown). In the example, the hollow body profile 12 is formed from two preferably symmetrical profile halves 30, 32 which are connected to one another on a parting plane 34. The hollow body profile 12 is divided along its longitudinal direction 14 into two profile halves 30, 32 (two axial profile halves 30, 32). The parting plane 34 lies in the middle region 28 of the hollow profile body 12. The longitudinal direction 14 of the hollow profile body 12 represents the normal vector of the parting plane 34. The parting plane 34 does not have to be planar, but rather can also be structured.

[0034] The profile halves 30, 32 can be screwed, welded, riveted and/or adhesively bonded to one another on the parting plane 34 (not shown).

[0035] On the parting plane 34, the profile halves 30, 32 can have a pronged structure 36 (cf. FIG. 4), via which the profile halves 30, 32 can be connected or are connected to one another in a positively locking manner. The pronged structure 36 has dovetail-shaped elevations 38 and depressions 40 in an alternating manner. In the case of assembled profile halves 30, 32, they engage into one another in an alternating manner. When the profile halves 30, 32 are assembled, a depth offset can occur in the case of symmetrical profile halves 30, 32, that is to say the profile halves 30, 32 can be arranged offset slightly with respect to one another along the vertical direction 16 (profile height) (cf. offset in FIG. 4).

[0036] The profile halves 30, 32 are secured on one another against a relative movement along the vertical direction 16 (profile height). The profile halves 30, 32 can be secured on one another, for example, by way of a vertical weld or a screw connection (not shown).