Body layout for a front end

Abstract

Body assembly for a front section (6) with at least one first load path plane (8, 10, 12) which has at least two longitudinal members (22, 24) and at least two transverse elements (18, 20) connecting the longitudinal members (22, 24), wherein at least the transverse element (20) rearward in the direction of travel is designed as a cross member, wherein a vehicle unit (38) is provided behind the cross member (20) in the direction of travel, characterized in that a unit carrier (36) with the vehicle unit (38) is connected to the rear transverse element (20) in the direction of load, wherein the vehicle unit (38) has at least one unit longitudinal member (40, 42).

Description

[0001] The invention relates to a body assembly for a front end of a vehicle with at least one load path which has at least two longitudinal members and at least two transverse elements connecting the longitudinal members, wherein at least the rear transverse element seen in the direction of travel is designed as a cross member, wherein a motor vehicle assembly is provided behind the cross member seen in the direction of travel.

[0002] Such body assemblies are well known in the art. DE 10 2004 061 707 A1 describes a body assembly in which a load path is formed by two longitudinal members. In the respective exemplary embodiment, the longitudinal members are connected by three transverse elements, which here are also designed as cross members. In the other exemplary embodiments, additional longitudinal struts or diagonal struts are arranged in the space between the longitudinal members in order to increase the rigidity of the front end. It should be clear that any type of such additional struts entails higher costs in the form of material and assembly costs. Furthermore, such struts can also be disadvantageous with regard to space optimization.Furthermore, from the generic German patent application DE 10 2004 061 707 A1, it is known to provide a motor vehicle assembly behind the cross member, as seen in the direction of travel, with additional support elements extending essentially in the longitudinal direction being provided between the front cross member and the motor vehicle assembly. This embodiment also has the aforementioned disadvantages. Further body arrangements are known from the prior art according to DE 198 56 980 A1, DE 297 04 093 U1, DE 11 2013 001 681 T5, DE 10 2011 015 541 A1, and DE 198 29 432 A1.

[0003] The object of the invention is therefore to provide a body arrangement which avoids the above-mentioned disadvantages.

[0004] This object is achieved by the features of claim 1, in particular by the fact that, viewed in the load direction, an assembly support with the vehicle assembly is connected to the rear cross member, wherein the vehicle assembly has at least one assembly longitudinal member. By integrating an assembly support into the load path, assembly and material costs can be reduced. This simple approach also allows for installation space optimization.

[0005] Particularly advantageously, the vehicle assembly is an electric motor, for which the at least one longitudinal member can serve as a support element. Furthermore, it is advantageous if the assembly support is designed as a chassis subframe.

[0006] Particularly advantageous is the provision of two longitudinal members that engage the vehicle's engine laterally. This ensures optimal force transmission while simultaneously supporting the engine.

[0007] Advantageously, the first load path level is designed as a lower load path level, with at least a second upper load path level being provided. In the event of a crash, the force is advantageously transmitted through the longitudinal member of the body to the vehicle floor or the vehicle tunnel. To further increase the rigidity of the vehicle, two diagonal members and another longitudinal member can be arranged between the cross members. It can also be advantageous if the front cross member is designed as a surface element.

[0008] The invention is explained in more detail below with reference to a drawing, in which: Fig. 1 is a perspective view of a body assembly of a motor vehicle, Fig. 2 is a perspective exploded view of a lower load-bearing level of a front end of the body assembly of Fig. 1, and Fig. 3 a top view of the lower load path level Fig. 2.

[0009] Fig. 1 shows a perspective view of a body assembly 2 of a motor vehicle 4 with a front end 6. The front end 6 essentially has three load path planes: a lower load path plane 8, a middle load path plane 10, and an upper load path plane 12. In the event of a crash, these load path planes are intended to ensure optimal force introduction into the body assembly 2, whereby deformations of a passenger cabin 14 and the engine compartment 16 located in front of it, viewed in the direction of travel, are to be avoided, particularly in the event of a frontal crash.

[0010] Fig. 2 now shows a perspective exploded view of the body assembly 2 in the area of ​​the front end 6. Shown here is the lower, first load path plane 8. The lower load path plane 8 has a first front transverse element 18, viewed in the direction of travel, which in the present exemplary embodiment is designed as a surface element. Furthermore, a second rear transverse element 20, viewed in the direction of travel, is provided, which is designed as a cross member. The surface element 18 and the cross member 20 are connected by two longitudinal members 22, 24, wherein the connection of the cross member 20 to the longitudinal members 22 and 24 is established by cast node elements 26, 28. For further reinforcement, in the present case two diagonal struts 30, 32 and a longitudinal strut 34 are provided between the transverse elements 18, 20. Viewed in the load direction, an aggregate carrier 36 with a vehicle aggregate 38, here an electric motor, is connected to the cross member 20.In the present embodiment, the subframe is designed as a chassis subframe. The electric motor 38 has two laterally extending subframes 40, 42, which, in the event of a crash, transmit the power to a vehicle floor or vehicle tunnel (not shown) of the motor vehicle 4.

[0011] Fig. Figure 3 now shows the lower load level 8 of the front end 6 in a top view in the assembled state. The cast nodes 26, 28 also serve to attach the power unit carrier 36. The electric motor 38 is centrally attached to the power unit carrier 36. The power unit longitudinal members 40, 42 essentially transmit the force introduced into the electric motor 38 by the longitudinal strut 34 into a vehicle tunnel or vehicle floor (not shown).

Claims

[1] Body assembly for a front end (6) with at least one first load path plane (8, 10, 12) which has at least two longitudinal members (22, 24) and at least two transverse elements (18, 20) connecting the longitudinal members (22, 24), wherein at least the rear transverse element (20) as seen in the direction of travel is designed as a cross member, wherein a motor vehicle unit (38) is provided behind the cross member (20) as seen in the direction of travel, characterized by that, viewed in the load direction, an assembly support (36) with the motor vehicle assembly (38) is connected to the rear transverse element (20), wherein the motor vehicle assembly (38) has at least one assembly longitudinal support (40, 42). [2] Body arrangement according to claim 1, characterized by that the vehicle unit (38) is an electric motor. [3] Body arrangement according to claim 1 or 2, characterized by that the unit carrier (36) is designed as a chassis subframe. [4] Body arrangement according to one of the preceding claims, characterized by that two longitudinal members (40, 42) are provided which engage laterally on the vehicle unit (38). [5] Body arrangement according to one of the preceding claims, characterized by that the first load path level (8) is designed as a lower load path level, wherein at least one second upper load path level (10, 12) is provided. [6] Body arrangement according to one of the preceding claims, characterized by that two diagonal beams (30, 32) and a further longitudinal beam (34) are arranged between the transverse elements (18, 20). [7] Body arrangement according to one of the preceding claims, characterized by that the front transverse element (18) is designed as a surface element.

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