Motor vehicle having a loading frame

Abstract

The invention relates to a motor vehicle having a load-bearing frame, which has a longitudinal member (1), which is formed from a profile (2) open to the outside of the vehicle, preferably a C-profile, at least in a section along the longitudinal extent thereof, i.e. In an energy-absorbing section, in which a cavity profile (3) having a plurality of cavities is accommodated at least partially.

Description

Technical Field

[0001] The present invention relates to a motor vehicle having a load-bearing frame having at least one longitudinal beam. Background Technology

[0002] Motor vehicles are known to be equipped with frames, particularly ladder frames, as load-bearing structures. A frame typically comprises two longitudinal beams along the longitudinal direction of the vehicle and usually at least two crossbeams connecting the two longitudinal beams. The longitudinal beams are typically formed from profiles with closed rectangular cross-sections.

[0003] It is known that motor vehicles are equipped with drive batteries to carry the driving energy required by electric or hybrid vehicles. The drive battery casing can be arranged between two longitudinal beams of the motor vehicle.

[0004] To dissipate energy in the event of a side impact, aluminum profiles are known to be used as energy absorbers. These are typically positioned individually on the outer side of the vehicle, near the frame longitudinal beams. The longitudinal beams and energy absorbers require relatively large mounting space, which reduces the maximum possible mounting space for the integrated drive battery. However, the necessary cross-section of the energy absorber is defined by the energy absorption required under side-impact load conditions. The typical structure results in very high torsional stiffness in the frame composite material of the battery integration area. The stiffness jumps typically generated at the transition from the battery area to the front or rear of the vehicle create structural weaknesses in the load-bearing frame. Summary of the Invention

[0005] The present invention aims to provide a motor vehicle with a load-bearing frame that at least reduces some of the aforementioned problems, and in particular has small installation space requirements and good side-impact behavior. A high-capacity drive battery should be able to be integrated into or incorporated into the load-bearing frame.

[0006] The task is addressed by a motor vehicle with a load-bearing frame having longitudinal beams, which, at least in one section along their longitudinal range, i.e., in the energy-absorbing section, are profiled to open outwards from the vehicle, preferably C-shaped profiles, wherein a cavity profile having multiple cavities is at least partially housed within the open profile.

[0007] According to the invention, the longitudinal beam is designed as an outwardly open profile, particularly a C-shaped profile, at least in the cross-section along the longitudinal direction of the motor vehicle. A cavity profile having multiple cavities is arranged on the outward-facing side of the profile and thus inside the C-shaped profile within the cavity formed by the open profile. The cavity profile extends along the open profile at least in a portion in which the open profile is formed, preferably substantially throughout the entire energy-absorbing section.

[0008] Due to the outwardly open C-shaped cross-section of the longitudinal beams, hollow profiles, preferably made of aluminum, can be integrated as crash barriers into the cross-section of the longitudinal beams, preferably made of steel. The hollow profiles require less additional installation space because they are not arranged laterally alongside the longitudinal beams, but rather at least partially within them. Therefore, this design increases installation space, particularly for the battery. This design results in lower torsional stiffness in the hollow profile integration area and, preferably, the battery integration area, thus reducing stiffness jumps at potential transitions to the preceding or following vehicle. This potential harmonization of the stiffness curves represents an advantage in structural weight optimization design.

[0009] Overall, compared to previously known solutions, it can save installation space and integrate larger drive batteries into motor vehicles while maintaining a light weight.

[0010] The improved design of the present invention is described in detail in the dependent claims, the specification and the drawings.

[0011] Preferably, the open profile is a steel profile. The cavity profile is preferably an extruded profile. The cavity profile is preferably made of aluminum.

[0012] The cavity profile preferably fills the open profile substantially completely in the Z-direction (i.e., the vertical direction) of the vehicle. However, the extent of the cavity profile in the Z-direction can also be smaller than the extent of the open profile in the Z-direction. It is advantageous to arrange the cavity profile in the upper, lower, or central region of the open profile.

[0013] Preferably, the cavity profile substantially completely fills the open profile in the Y direction (i.e., in the lateral direction of the vehicle). Therefore, the cavity profile is pushed into the open profile such that it directly or indirectly abuts against the profile wall of the open profile. Preferably, the width of the cavity profile is approximately the same as the width of the open profile, but it can also be designed to be narrower. Preferably, the cavity profile protrudes beyond the open profile in the Y direction of the vehicle and is preferably designed to have a wider receiving space than the open profile. The cavity profile is preferably approximately twice the width of the open profile.

[0014] Preferably, the cavity profile substantially completely fills the open profile in the X direction, i.e., in the longitudinal direction of the vehicle, i.e., it is arranged substantially in the entire area of ​​the longitudinal beam formed by the open profile.

[0015] Preferably, the longitudinal beam is formed by a closed profile, preferably a rectangular profile, at least in the section extending along its longitudinal direction, in front of and / or behind the energy-absorbing section. The closed profile is preferably made of steel. The closed profile preferably forms the front and / or rear compartments of the motor vehicle. One or more closed profiles preferably transition into open profiles in one piece or are made as one piece.

[0016] The motor vehicle preferably includes a drive battery, which is arranged substantially along the longitudinal direction of the motor vehicle in an energy absorption section. Open profiles and hollow profiles are preferably formed at least in or exactly at the location where the drive battery is arranged, along the longitudinal direction.

[0017] The motor vehicle preferably has two similar longitudinal beams, with the vehicle's drive battery arranged between the two longitudinal beams. The energy absorption sections of the drive battery and the longitudinal beams are preferably formed in the central portion along the longitudinal direction of the motor vehicle. Attached Figure Description

[0018] The invention is described below by way of example with reference to the accompanying drawings.

[0019] Figure 1 This is a cross-sectional view of a motor vehicle not according to the invention in the longitudinal beam region, cut through a plane perpendicular to the longitudinal beam and along the longitudinal direction in the central region of the longitudinal beam.

[0020] Figure 2 It is a cross-sectional view of the motor vehicle according to the invention in the longitudinal beam region, cut through a plane perpendicular to the longitudinal beam and in the longitudinal direction in the central region of the longitudinal beam.

[0021] Figure 3 This is a schematic diagram of a motor vehicle according to the present invention, viewed from the side. Detailed Implementation

[0022] Figure 1 This is a cross-sectional view of a motor vehicle without the invention in the region of the longitudinal beam 1, cut through a plane perpendicular to the longitudinal beam 1 and longitudinally in the central region of the longitudinal beam 1. In the longitudinal central region of the longitudinal beam 1 and the motor vehicle, the drive battery 5 is arranged between two longitudinal beams 1 near the floor of the motor vehicle. Figure 1 In embodiments not according to the invention, the longitudinal beam 1 is designed as a closed profile 4, i.e., a rectangular profile having at least one reinforcing web inside the closed profile 4. The drive battery 5 is fixed to the longitudinal beam 1 with screws. A cavity profile 3 having multiple cavities is laterally arranged beside the profile of the longitudinal beam 1. The total installation space requirement 6 for the longitudinal beam 1 and the cavity profile 3 is as follows: Figure 1 The arrow in the figure is indicated by reference numeral 6.

[0023] Figure 2 It corresponds to Figure 1 The cross-sectional view, but in the motor vehicle according to the present invention, the structural space requirement 6 for the longitudinal beam 1 and the cavity profile 3 is also... Figure 2 The arrow in the middle is indicated by reference numeral 6 and is significantly smaller than the one shown in the attached figure. Figure 1 The solution is that the longitudinal beam 1 exists at least in one section extending along its longitudinal direction, i.e., in the energy absorption section (such as...). Figure 2 (As shown) It is composed of a profile 2 that opens to the outside of the vehicle, i.e., as a C-shaped profile, wherein a cavity profile 3 with multiple cavities is accommodated in the open profile 2.

[0024] Therefore, the hollow profile 3, designed as an aluminum profile, is partially located inside the open profile 2 of the longitudinal beam 1, which is made of steel. Consequently, the width of the longitudinal beam 1 and the hollow profile 3 together is correspondingly smaller. The saved installation space can preferably be used as additional installation space for the drive battery 5, thus allowing the drive battery to have a higher capacity.

[0025] like Figure 2 As shown, the cavity profile 3 substantially completely fills the open profile 2 in both the Z and Y directions of the vehicle. The cavity profile 3 is wider than the open profile 2, approximately twice the width of the open profile 2. The cavity profile 3 protrudes beyond the open profile 2 towards the outside of the vehicle in the Y direction.

[0026] The motor vehicle includes a drive battery 5 housed in a battery casing. The drive battery 5 is arranged substantially in the energy absorption section along the longitudinal direction of the motor vehicle, i.e., in the area where the longitudinal beam 1 is designed as an open profile 2, thus positioned in the middle third of the longitudinal beam 1. The drive battery 5, particularly its casing, is attached to the open profile 2, specifically threaded to the lower section of a C-shaped profile that extends outwards from the underside of the open profile 2. A fixing section for the drive battery 5 can be arranged below the edge of the C-shaped profile 2 and secured in the overlapping portion with screws.

[0027] The motor vehicle has two identical longitudinal beams 1, and the drive battery 5 is arranged between the two longitudinal beams 1 along the Y direction.

[0028] Figure 3 The longitudinal extension of the vehicle's supporting frame, viewed from the side, is shown. The longitudinal beam 1 is designed as an open C-shaped profile 2 only in its middle third. Along its longitudinal length, before and after the energy-absorbing section, the longitudinal beam 1 is formed by a closed profile 4, preferably a rectangular profile. In these areas, on the front and rear compartments, no energy-absorbing elements are arranged on the longitudinal beam 1; that is, no hollow profiles are arranged.

[0029] By geometrically and functionally integrating hollow profiles, i.e. cavity profiles or anti-collision profiles 3 (which mainly have the function of absorbing collision energy in the event of an accident) into the cross section of the frame longitudinal beams 1, the structural space requirement 6 can be significantly reduced.

[0030] To integrate the anti-collision profile 3 into the frame cross-section, the closed profile cross-section 4 is changed to an outwardly open C-profile 2. This is helpful in the area of ​​the collision profile 3. The frame longitudinal beam 1 can be designed as a closed profile 4 in the area in front of and behind this area (energy absorption section).

[0031] By reducing the installation space requirement 6, a larger geometric installation space can be provided for the battery 5 in the lateral direction (Y direction) of the vehicle within the same vehicle width. At the same time, the weight of the overall structure or the supporting frame can also be reduced.

[0032] List of reference numerals

[0033] 1 Longitudinal Beam

[0034] 2 Open profiles

[0035] 3 cavity profile

[0036] 4 Closed profiles

[0037] 5 drive batteries

[0038] 6. Installation space requirements

Claims

1. A motor vehicle having a load-bearing frame, wherein, The frame has longitudinal beams (1). The feature is that the longitudinal beam (1) is formed at least in the section extending along its longitudinal direction, i.e. in the energy absorption section, by a profile (2) open to the outside of the vehicle, the profile (2) preferably being a C-shaped profile, wherein a cavity profile (3) having multiple cavities is at least partially accommodated in the open profile (2).

2. The motor vehicle according to claim 1, Its features are, The open profile (2) is a steel profile and / or the cavity profile (3) is an extruded profile and / or the cavity profile (3) is made of aluminum.

3. The motor vehicle according to claim 1, Its features are, The cavity profile (3) substantially completely fills the open profile (2) in the Z and / or Y and / or X directions of the vehicle.

4. The motor vehicle according to claim 1, Its features are, The cavity profile (3) protrudes outward from the vehicle in the Y direction beyond the open profile (2), wherein preferably, the width of the cavity profile (3) is approximately twice that of the open profile (2).

5. The motor vehicle according to claim 1, Its features are, The longitudinal beam (1) is formed, at least in the section extending along its longitudinal direction, before and / or after the energy absorption section by a closed profile (4), preferably by a rectangular profile.

6. The motor vehicle according to claim 1, Its features are, The motor vehicle includes a drive battery (5), wherein the drive battery (5) is arranged substantially in the energy absorption section along the longitudinal direction of the motor vehicle.

7. The motor vehicle according to claim 1, Its features are, The motor vehicle has two identical longitudinal beams (1), wherein the motor vehicle's drive battery (5) is arranged between the two longitudinal beams (1).

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