阅读说明：本技术 用于具有牵引电池的机动车辆的车身底部结构 (Underbody structure for a motor vehicle with traction battery ) 是由 P·克贝尔 S·基尔魏因 于 2019-05-07 设计创作，主要内容包括：本发明涉及一种用于具有牵引电池(2)的机动车辆的车身底部结构(1),该车身底部结构包括：-第一纵梁(3)和第二纵梁(4),它们在车辆纵向方向上延伸；-底部金属板(5),该底部金属板在这两个纵梁(3,4)之间展开；以及-中央通道(6,6’),该中央通道在车辆纵向方向上延伸并且具有空腔(60,60’),该空腔被设计用于接纳该机动车辆的构件部件,其中该牵引电池(2)布置在该车身底部结构(1)的底侧,并且其中该中央通道(6,6’)的空腔(60,60’)被设计为朝向车辆内部空间(7)开放。(The invention relates to an underbody structure (1) for a motor vehicle having a traction battery (2), comprising: -a first longitudinal beam (3) and a second longitudinal beam (4) extending in the longitudinal direction of the vehicle; -a bottom metal sheet (5) which develops between the two longitudinal beams (3, 4); and-a central channel (6, 6 ') which extends in the vehicle longitudinal direction and has a cavity (60, 60') which is designed for receiving a component part of the motor vehicle, wherein the traction battery (2) is arranged on the underside of the underbody structure (1), and wherein the cavity (60, 60 ') of the central channel (6, 6') is designed to be open towards the vehicle interior (7).)

1. An underbody structure (1) for a motor vehicle having a traction battery (2), comprising:

-a first longitudinal beam (3) and a second longitudinal beam (4) extending in a vehicle longitudinal direction;

-a bottom metal sheet (5) which develops between the two longitudinal beams (3, 4); and

-a central channel (6, 6 ') extending in the vehicle longitudinal direction and having a cavity (60, 60') arranged for receiving a component part of a motor vehicle,

wherein the traction battery (2) is arranged on the underside of the underbody structure (1),

characterized in that the cavity (60, 60 ') of the central channel (6, 6') is designed to be open towards the vehicle interior space (7).

2. The underbody structure (1) of claim 1, characterized in that said central channel (6, 6') has a substantially U-shaped cross section.

3. The underbody structure (1) according to one of claims 1 or 2, characterized in that the central channel (6, 6 ') comprises a first central channel wall (61, 61') and a second central channel wall (62, 62 ') for laterally delimiting the cavity (60), which extend in a longitudinal direction of the underbody structure (1), and which has a floor (63, 63').

4. The vehicle body bottom structure (1) according to claim 3, characterized in that the first and second center channel walls (61, 62) are designed as flat profiles, which are fixed upright on the upper side of the bottom metal sheet (5).

5. The underbody structure (1) of one of claims 3 or 4, characterized in that the floor (63) of the central channel (6) is formed by a section of the bottom metal sheet (5) extending between the two central channel walls (61, 62).

6. The underbody structure (1) of claim 3, characterized in that the central channel (6 ') is designed as a shaped body comprising two central channel walls (61', 62 ') and a floor (63') extending between the two central channel walls (61 ', 62').

7. The underbody structure (1) of claim 6, characterized in that the shaped body is designed in one piece.

8. Underbody structure (1) according to one of claims 1 to 7, characterized in that the traction battery (2) is mounted on the bottom side of the bottom metal plate (5).

9. Motor vehicle with an underbody structure (1) and a traction battery (2) which is mounted on the underside of the underbody structure (1), characterized in that the underbody structure (1) is implemented according to one of claims 1 to 8.

Technical Field

The invention relates to an underbody structure for a motor vehicle with traction battery, comprising: a first longitudinal member and a second longitudinal member extending in a vehicle longitudinal direction; a bottom metal plate that is spread between the two longitudinal beams; and a central channel which extends in the vehicle longitudinal direction and has a cavity which is designed to receive a component part of the motor vehicle, wherein the traction battery is arranged on the underside of the underbody structure.

Background

In the development of motor vehicles, alternative drive concepts play an increasingly important role. Purely electrically driven motor vehicles (also often referred to as battery-powered motor vehicles and having at least one electric machine as a drive) or hybrid vehicles (which have at least one electric machine in addition to a combustion engine) are equipped with a traction battery in order to supply the electric machine with electrical energy. Different mounting positions are conceivable for the traction battery. Possible mounting locations are located at the bottom side of the underbody structure.

Motor vehicles with a combustion engine as a drive device usually have a central tunnel extending in the longitudinal direction of the vehicle. Such a central tunnel contributes to the crash safety of the motor vehicle, since it is conceptually designed such that it can dissipate a part of the load acting on the motor vehicle in a frontal crash. Furthermore, such a central channel provides structural space for various component parts of the motor vehicle, for example for parts of the transmission or exhaust system of the motor vehicle. The central tunnel of a conventional motor vehicle has a cavity which is designed to open downwards. For example, the central channel may have an inverted U-shaped cross-section, so that a downwardly open cavity is obtained. The component parts to be placed in the central channel are therefore mounted from below in the central channel and in the outer region of the motor vehicle.

DE 102009006990 a1 discloses an underbody structure for a motor vehicle having a traction battery, wherein the underbody structure has a central channel with an inverted U-shaped cross section and a downwardly open cavity. The cavity is for receiving a traction battery.

It has proven to be advantageous for the traction battery to be arranged on the underside of the underbody structure between the first longitudinal beam and the second longitudinal beam extending in the longitudinal direction of the vehicle. In addition to the improved crash behavior, a reduction of the vehicle center of gravity is achieved due to the arrangement of the traction battery on the underside of the underbody structure, which can have a positive effect in particular on the driving dynamics of the motor vehicle. However, since the cavity of the central channel is designed to be open downward, it is blocked by the traction battery arranged on the underside of the underbody structure, so that it is not possible to place component parts in the cavity of the central channel without first disassembling the traction battery. This severely limits the usability of the central channel for receiving component parts of the motor vehicle, since, for example, in the case of a defect in one of the component parts, the cavity of the central channel can only be accessed from below after the laborious removal of the traction battery.

Disclosure of Invention

It is an object of the invention to provide an underbody structure for a motor vehicle with a traction battery of the type mentioned in the opening paragraph, which underbody structure effectively improves the usability of the cavity of the central channel in the case of a traction battery mounted under the underbody structure.

The solution to this object provides a vehicle underbody structure of the generic type with the features of the characterizing portion of claim 1. The dependent claims relate to advantageous developments of the invention.

The vehicle body frame structure according to the invention is characterized in that the cavity of the central channel is designed to be open towards the vehicle interior space. Since the cavity of the central tunnel is designed to be open towards the vehicle interior and thus can be accessed from the vehicle interior from above, the component parts can be mounted in the cavity very easily without, for example, having to dismantle the traction battery beforehand. Thus, despite the arrangement of the traction battery below the underbody structure, the cavity of the central channel, which is designed to be open upward, can be used as a structural space for receiving component parts (e.g. electronic component parts) of the motor vehicle. Thereby yielding significant packaging advantages.

Preferably, the central channel may have a substantially U-shaped cross-section.

In an advantageous embodiment, it can be provided that: the central channel has a first central channel wall and a second central channel wall for laterally delimiting the cavity, which extend in the longitudinal direction of the underbody structure, and which comprises a floor panel. The first and second central channel walls, which are fastened upright on the upper side of the bottom metal sheet, can preferably be designed as flat profiles, in particular with a substantially I-shaped cross section. The two flat profiles can be fixed to the upper side of the base metal sheet, for example, in a material-fitting manner (in particular by welding or gluing) or by means of suitable fastening means.

In a particularly advantageous embodiment, the floor of the central channel can be formed by a section of the bottom metal sheet which extends between the two central channel walls. It is therefore not necessary for the central channel to have an additional floor, since in this embodiment the floor is formed by the section of the bottom metal sheet between the two central channel walls. By eliminating the additional floor, a weight advantage is produced in particular.

In an alternative, advantageous embodiment, the following possibilities exist: the central channel is formed as a shaped body, in particular with a substantially U-shaped cross section, comprising the two central channel walls and a floor plate extending between the two central channel walls. The fixing of this shaped body to the upper side of the bottom metal sheet can take place, for example, in a material-fitting manner (in particular by welding or gluing) or by means of suitable fastening means.

In order to simplify the production and assembly of the central channel, it is proposed in a particularly advantageous embodiment that the molded body is designed as a single piece.

In a preferred embodiment, it is provided that the traction battery is mounted on the underside of the bottom metal plate. Preferably, the traction battery may extend between the two longitudinal beams. By means of this mounting position of the traction battery, a particularly improved performance of the motor vehicle in the event of a crash results.

According to another aspect, the invention relates to a motor vehicle having an underbody structure and a traction battery mounted on an underside of the underbody structure. According to the invention, the motor vehicle is characterized in that the underbody structure is implemented according to one of claims 1 to 8.

Drawings

Further features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the accompanying drawings. In the drawings:

fig. 1 shows a schematic highly simplified cross-sectional view of a vehicle underbody structure in a lateral direction, which is implemented according to a first embodiment of the present invention,

fig. 2 shows a schematic highly simplified cross-sectional view of a vehicle underbody structure in the lateral direction, which is implemented according to a second embodiment of the present invention.

Detailed Description

With reference to fig. 1, a vehicle underbody structure 1 embodied according to a first embodiment (which is provided for a motor vehicle 1 having a traction battery 2, in particular for a battery-powered or hybrid vehicle) comprises a first longitudinal beam 3 and a second longitudinal beam 4 which extend substantially parallel to one another in the longitudinal direction of the vehicle (i.e. towards the image plane). The underbody structure 1 also has an underbody metal plate 5, which extends between the two longitudinal beams 3, 4. The traction battery 2 is arranged on the underside of the bottom metal plate 5 and likewise extends between the two longitudinal beams 3, 4.

Furthermore, the vehicle underbody structure 1 has a central tunnel 6 which likewise extends in the vehicle longitudinal direction. Such a central channel 6 serves in particular in terms of stability for the purpose of carrying out loads in the event of a frontal collision of the motor vehicle and thus improves the performance of the motor vehicle in the event of a collision.

The central channel 6 is designed here such that it has a cavity 60 which is open towards the vehicle interior 7. This makes it possible to make the cavity 60 accessible from above (i.e. from the vehicle interior 7). This offers the following possibilities: additional component parts of the motor vehicle, such as electronic component parts, may be received within the cavity 60 of the central passage 6. Since the cavity 60 of the central tunnel 6 is accessible from above from the vehicle interior 7, the component parts can be mounted very easily in the cavity 60 without the traction battery 2 having to be removed in advance with great effort. Thus, despite the arrangement of the traction battery 2 below the bottom metal plate 5, it is possible here to use the cavity 60, which is open upwards towards the vehicle interior 7, as a structural space for component parts of the motor vehicle (for example electronic component parts). Thereby obtaining particular packaging advantages.

In the embodiment illustrated in fig. 1, the cavity 60 of the central channel 6 is laterally delimited by a first central channel wall 61 and a second central channel wall 62 extending in the longitudinal direction of the underbody structure 1. The first central channel wall 61 and the second central channel wall 62, which are fastened upright on the upper side of the bottom metal sheet 5, are designed here as flat profiles, in particular with a substantially I-shaped cross section. Furthermore, the central channel 6 has a bottom plate 63, which is formed by the section of the bottom metal sheet 5 extending between the two central channel walls 61, 62. The fastening of the two central channel walls 61, 62, which are embodied as flat profiles, to the upper side of the bottom metal sheet 5 can take place, for example, in a material-fitting manner (in particular by welding or gluing) or by means of suitable fastening means.

With reference to fig. 2, a second embodiment of an underbody structure 1 for a motor vehicle having a traction battery 2 will be explained in more detail below. The basic structural configuration corresponds to that of the first embodiment.

The underbody structure 1 in turn has a first longitudinal beam 3 and a second longitudinal beam 4 extending substantially parallel to each other in the vehicle longitudinal direction. Furthermore, a bottom metal plate 5 is provided, which is spread between the two longitudinal beams 3, 4. The traction battery 2 is arranged on the underside of the bottom metal plate 5 and in turn extends between the two longitudinal beams 3, 4.

Furthermore, the underbody structure 1 has a central channel 6 ', which is likewise designed such that it has a cavity 60' which is open toward the vehicle interior 7. The cavity 60 'of the central channel 6' is thus accessible from above (i.e. from the vehicle interior 7) as already described in the first embodiment. This measure further makes it possible to accommodate additional component parts of the motor vehicle (for example, electronic component parts) in the cavity 60 'of the central channel 6', so that corresponding packaging advantages result. Since the cavity 60 ' of the central channel 6 ' can be accessed from above from the vehicle interior 7, the component parts can be mounted very easily in the cavity 60 ' without the need for prior disassembly of the traction battery 2. Thus, despite the arrangement of the traction battery 2 below the bottom metal plate 5, the upwardly open cavity 60 'of the central channel 6' can be used as a structural space for component parts of the motor vehicle.

In contrast to the first embodiment, in which the central channel 6 is formed by the two central channel walls 61, 62 and the section of the bottom metal plate 5 extending between the two central channel walls 61, 62, the central channel 6 'is designed in this embodiment as a preferably one-piece shaped body with a substantially U-shaped cross section, comprising the two central channel walls 61', 62 'extending in the vehicle longitudinal direction and a bottom plate 63' extending between the two central channel walls 61 ', 62'. The fixing of the central channel 6', which is designed here as a shaped body, to the upper side of the bottom metal plate 5 can take place, for example, in a form-fitting manner (in particular by welding or gluing) or by means of suitable fastening means.