Rear seat panel for motor vehicle body

Abstract

The invention relates to a rear seat plate (1) of a motor vehicle body (14), comprising a rear part of a footrest base plate (2) and a rear seat support (3), the footrest base plate (2) and the rear seat support (3) being mutually offset in height in the vertical direction (Z) of the motor vehicle, and a transmission channel section being formed in the footrest base plate (2), the footrest base plate (2) and the rear seat support (3) are integrally designed as a sheet-metal deformation component, with a reinforcing structure, and with sections of different strengths and / or different wall thicknesses in one extruder stroke via the connecting section (4).

Description

Technical Field

[0001] The invention relates to a rear seat plate of a motor vehicle body. Background Art

[0002] A motor vehicle is a car with a combustion or electric drive for the transport of people or goods. Such motor vehicles or cars have been manufactured for many years with so-called monocoques or motor vehicle bodies. Such bodies consist of individual metal components, mostly sheet steel components, but also aluminum components, welded together. In this case, the individual components of the monocoque, such as A-pillars, B-pillars, C-pillars, longitudinal beams, crossbeams, and hood bows, are manufactured as individual extruded components and subsequently coupled to one another, in particular welded, to form the monocoque.

[0003] The individual components themselves are manufactured with high precision. The joining operation of the individual components may require reorientation or calibration, since tolerances may also arise through the joining.

[0004] A rear seat panel is known from the prior art 1. Summary of the invention

[0005] The object of the invention is to provide, starting from the prior art, a possibility for producing a complete rear seat panel in a simpler and more cost-effective manner than the methods known from the prior art, while at the same time improving its rigidity and crash behavior.

[0006] The above object is achieved in a rear seat panel located on a vehicle body.

[0007] The rear seat is provided for a motor vehicle body. This is a complete rear seat. The rear seat has a rear part of the footrest, and thus at least a part of the footrest, in which the passenger places his feet on the rear seat of the motor vehicle. In addition, the rear seat has a rear seat support, wherein the footrest and the rear seat support are arranged at a height offset relative to each other in the vertical direction of the motor vehicle. Optionally, a transmission channel section is formed in the footrest. The footrest itself and the rear seat support are manufactured in one piece as a sheet metal deformation component via a connecting section, and in particular in a press stroke.

[0008] According to the invention, the rear seat panel is characterized in that a reinforcement structure is constructed, and in the rear seat panel, the reinforcement structure is formed geometrically and / or by reinforcement patches, and in the rear seat panel, different strengths, especially tensile strengths Rm and / or different wall thicknesses are constructed in sections.

[0009] In the sense of the present invention, one-piece means that the entire rear seat plate is made in a forming press in one press stroke. For this purpose, a sheet blank is first provided. The sheet blank itself can be constructed in one piece and with consistent materials, for example, by a tailored welded blank. However, the sheet blank can also be provided as a tailored welded blank consisting of a plurality of plates of different material qualities and / or different wall thicknesses, which are subsequently welded into a tailored welded blank before the actual forming. The tailored welded blank is then inserted into the forming die as a one-piece sheet blank. The tailored welded blank can be manufactured by overlapping areas, for example, using spot welding. However, the tailored welded blank can also be manufactured by butting against each other and then welding (for example laser welding). In the case of cold forming, the same one-piece sheet blank is formed. However, here, the shaping can be carried out in multiple stages, for example, by a sequential transfer press.

[0010] By manufacturing in a forming press, the entire component is particularly cost-effective and simple to manufacture, since the individual components do not have to be press-formed separately from one another and then joined again. As a result, the component also has a high degree of precision.

[0011] Another advantage is that not only high geometrical precision can be produced in the components. Instead, corresponding reinforcements can also be formed in the components, for example with regard to the particularly high rigidity to be achieved, in particular the torsional rigidity of the vehicle body, and / or be provided by different tensile strengths. Since, in particular, the individual components do not have to be welded again afterwards, this also has a favorable influence on the crash performance to be achieved and also provides corresponding corrosion protection. In the case of hot forming and press hardening, the components are preferably coated, in particular with an aluminum-silicon coating, or in the case of cold forming with zinc.

[0012] If, in particular, hot deformation and press hardening techniques are used, it is thus possible to provide components which are corrosion-resistant and at the same time also have high strength in places.

[0013] The tensile strength Rm is particularly preferably in a strength range of greater than 1000 MPa, preferably greater than 1350 MPa, and in particular greater than 1950 MPa, and is particularly preferably formed in a connecting section with 1500 MPa, and very particularly preferably greater than 1800 MPa. This has a particularly favorable effect on the torsion-resistant body during normal operation of the motor vehicle. Therefore, the vehicle body also has a particularly high rigidity in the side impact behavior. The footrest and the rear seat bracket, in particular with the connecting section to other body components, are relatively soft in this regard and therefore exhibit high ductility, so that no other body components will break. This achieves a perfect match with high collision safety, thereby protecting the passenger compartment and making it torsionally rigid.

[0014] In addition to alternative design variants, a reinforcement bead is also formed in the transition between the rear seat and the connecting section and / or on or in the transition from the connecting section to the footrest. The reinforcement bead extends substantially over the entire width of the rear seat. The width extends substantially along the transverse direction y of the motor vehicle. The reinforcement bead is oriented in its cross section along the vertical direction or longitudinal direction of the motor vehicle. Therefore, in the installed state of the rear seat in the motor vehicle body, the valley of the bead in the direction of the rear axle is shown in the cross section. The overall rigidity of the motor vehicle body is also improved thereby. This possibility that the rear seat is formed in one piece enables the reinforcement bead to be formed. If the individual parts of the rear seat, therefore the rear seat bracket, the connecting section and / or the footrest are manufactured separately, there are sometimes separation locations or welds in the region of the reinforcement bead to be formed, which just cannot realize this manufacturing of the reinforcement bead.

[0015] A longitudinal bead is formed in the rear seat support itself. In particular, a longitudinal bead is formed on the outside in the transverse direction of the vehicle, which then extends in the longitudinal direction of the vehicle over the entire length of the rear seat support. This provides in particular a connection option, for example, to couple the rear seat panel to a wheel arch or an inner side wall of the vehicle.

[0016] In a further preferred embodiment variant, longitudinal beads and / or transverse beads are integrally formed in the footrest itself.

[0017] In addition, particularly preferably, a receiving portion for coupling other components, especially a battery box or a battery box is provided in the footrest. In particular, in the footrest, a through-type threaded sleeve or a through-type threaded sleeve is provided for this purpose to be coupled thereto. The footrest can also be locally constructed with a higher tensile strength, so that the weight receiving portion of several 100kg of the corresponding battery box is just optimally connected. For this reason, in the footrest, in particular longitudinal and / or transverse curling is formed, or in other words, a strip section with a higher tensile strength Rm, especially greater than 1000MPa, is constructed when extending in the longitudinal or transverse direction. Enough rigidity is thus ensured to accommodate the battery box or the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other advantages, features, characteristics, aspects of the present invention are the subject of the following description. Preferred design variants are shown in schematic diagrams. These drawings help to simplify the understanding of the present invention. It shows:

[0019] Figure 1 The rear seat panel according to the present invention is shown in a perspective view;

[0020] Figure 2 a shows a top view of the rear seat plate according to the present invention;

[0021] Figure 2b shows a front view of the rear seat plate;

[0022] Figure 3 a- Figure 3 f shows different cross sections of the rear seat panel according to the present invention;

[0023] Figure 4 a and Figure 4 b shows an alternative design variation of the rear seat plate;

[0024] Figure 5 Shows Figure 4 A design variation of an alternative shape of a;

[0025] Figure 6 a and Figure 6 b shows another design variation of the present invention;

[0026] Figure 7 a- Figure 7 e shows different cross-sectional views in a tailored welded blank in which two plates placed one against the other are covered by a segment.

[0027] List of reference numerals:

[0028] 1: Rear seat plate

[0029] 2: Footrest

[0030] 3: Rear seat bracket

[0031] 4: Connecting sections

[0032] 5: Enhanced curling

[0033] 6: Enhanced patch

[0034] 7: Width

[0035] 8: Transition

[0036] 9: Stairs

[0037] 10: Accommodation

[0038] 11: Battery box

[0039] 12: Flange

[0040] 13: Longitudinal curling

[0041] 14: Motor vehicle body

[0042] 15: Motor vehicle B-pillar

[0043] 16: Threshold

[0044] 17: Sidewall

[0045] 18: Luggage compartment section

[0046] 19: Storage tank

[0047] 20: Accommodation area

[0048] 21: Connection parts

[0049] 22: Thin sheet

[0050] 23: thick plate

[0051] 24: Thickness Sudden Change

[0052] 25: Bending part

[0053] X: Longitudinal direction of the vehicle

[0054] Y: Transverse direction of the vehicle

[0055] Z: Vertical direction of the vehicle DETAILED DESCRIPTION

[0056] In the figures, the same reference numerals are used for identical or similar components, even if a repeated description is omitted for the sake of simplicity.

[0057] Figure 1 A rear seat panel 1 is shown for use in a partially shown motor vehicle body 14. The rear seat panel has a rear part of a footrest 2. The rear part is referred to in this case in the longitudinal direction X of the motor vehicle. A connecting section 4 is formed between the footrest 2 and the rear seat support 3, which extends obliquely to the rear in the vertical direction Z of the motor vehicle. The rear seat support 3, the connecting section 4 and the footrest 2 are formed as one piece in one extruder stroke. Optionally, however, and not shown in detail here, the rear part of the transmission channel or transmission tunnel can also be molded in the area of ​​the footrest 2 or the connecting section 4. In addition, in Figure 1 The motor vehicle B-pillar 15 is shown in the front region of the rear seat 14. In addition, a door sill 16 and a rear side wall 17 are shown. In particular, a part of the rear seat panel 1 is coupled from the inside to the corresponding rear side wall 17. The rear seat panel 1 itself is then coupled to the motor vehicle body 14, for example welded. However, the rear seat panel 1 itself is formed as a one-piece component on a large press (also called a gigapascal press) in one extruder stroke.

[0058] Figure 2 a shows a top view of a rear seat panel 1 according to the invention. The sections of the footrest 2, the connecting section 4 and the rear seat support 3 are shown again.

[0059] according to Figure 2b shows another front view of the battery box 11 in a top view. Flanges are formed on the outer edges by expansion. The flanges preferably extend along the longitudinal direction X of the motor vehicle over the entire length of the battery box 11.

[0060] Figure 3 a to Figure 3 f show cross sections that are different from each other.

[0061] according to Figure 3 a, the reinforcing bead 5 is formed in the transition area between the connecting section 4 and the rear seat support 3. This reinforcing bead 5 can optionally form a double layer together with the reinforcing patch 6 shown. In addition and in addition, the wall thickness can be increased in the area of ​​the reinforcing bead 5. However, the tensile strength Rm can also be increased in the area of ​​the reinforcing bead 5, particularly preferably greater than 1000 MPa. The wall thickness in the area of ​​the connecting section 4 can also be increased accordingly.

[0062] Figure 3 b shows an alternative design variant, in which no reinforcing patch 6 is arranged behind the reinforcing bead 5. Figure 2 a extends substantially over the entire width 7 in the transverse direction Y of the vehicle. The width 7 is preferably the width in the region of the rear seat support. However, the width 7 can also be the width of the footwell panel, in particular in relative terms, according to which the reinforcing bead extends over more than 50% of the width.

[0063] according to Figure 3 c, the transition from the footrest 2 to the connecting section 4 is configured to be curved. In addition, another step 9 is formed in the region of the rear seat support 3. The step 9 can also extend over the entire width 7, but this is not shown in detail.

[0064] Figure 3 D shows Figure 3 An alternative design variant of c.

[0065] Figure 3 Figure e shows a design variant in which a reinforcement bead 5 is formed in the transition region between the footrest 2 and the connecting section 4 .

[0066] Figure 3 Figure f shows a design variant. Here, a receiving portion is also constructed in the area of ​​the footrest 2. This receiving portion is used to couple with a battery box 11 or battery box, which is only shown, to accommodate a motor vehicle battery in the bottom area.

[0067] Figure 4 a and Figure 4b shows an alternative design variant. In this case, the outer edge is correspondingly formed as a longitudinal bead 13. This longitudinal bead 13 extends over the entire length of the rear seat 1 in the vehicle X direction. This provides increased rigidity. All the above-mentioned embodiment variants with respect to the reinforcing bead 5 extending in the vehicle transverse direction Y apply analogously to the embodiment according to Figure 4 a and Figure 4 Design variant of b.

[0068] Figure 5 Show Figure 4 An alternative design variant of a. The longitudinal reinforcing bead 13 is not formed in the connecting section 4. The longitudinal reinforcing bead 13 is therefore formed only in the area of ​​the footrest and the back banana rest.

[0069] Figure 6 a and Figure 6 B shows another design variant according to the present invention. Here, the rear seat support is constructed to be extended backward in the longitudinal direction of the motor vehicle, opposite to the direction of travel. This extension forms a luggage compartment section 18. In the luggage compartment section 18, a receiving groove 19 for accommodating an energy storage device not shown in detail is preferably arranged.

[0070] Furthermore, a receiving area 20 for coupling to a wheel arch (not shown in further detail) can be formed in the luggage compartment section 18. The receiving area 20 is particularly reinforced. This means that the reinforcement is formed either by an increased tensile strength, in particular a tensile strength of more than 1000 MPa and / or by a greater wall thickness and / or by a patched area, thus by an area with a double layer of sheet metal spot-welded in a tailor-welded blank. In particular, at least one connection point 21 is formed for direct coupling to a chassis component, such as a control arm, a shock absorber or a spring strut mount. Further reinforcement of the vehicle body can therefore be dispensed with.

[0071] Figure 7 a- Figure 7 e shows five different thickness transitions from a sheet blank as a tailor-welded blank. In each case, a thin sheet 22 passes through a relatively thick sheet 23 or Figure 7 In case b, the tailor-made blanks are butt-welded to each other, with the thickness transition taking place from both sides. In the region of the thickness jump 24, a reinforcing patch 6 or patch is placed on one side. This patch additionally reinforces the region of the thickness transition. Figure 7 a and Figure 7 b and Figure 7 d and Figure 7 In case e, the reinforcing patch has a bend 25 in its cross section so that it compensates for the thickness jump 24 or thickness transition. Figure 7In the case of c, one side of the thick plate 23 and the thin plate 22 is designed to be flat, so that the reinforcing patch 6 is also designed to be flat in its cross-sectional profile. Figure 7 d or Figure 7 The design variant of e is preferred. The cross-section of the bottom side of the thick sheet 23 and the thin sheet 22 is also designed to be flat. The thickness jump 24 is then covered by the assembly plate. The patch is applied before the actual hot forming process. This can avoid the corresponding need for the slide or segment of the tool to fly away.

[0072] Figure 7 e shows Figure 7 The patched welded blank in the state after hot forming and press hardening in d. The previously existing gap between the two plates of the welded blank and the welded blank is largely closed due to the thermal deformation, so that no corrosion problems will occur during the subsequent KTL coating of the body and during vehicle use.

[0073] The steel types used can be used as examples for all variants of the invention. In particular, different types of steel can be combined with one another in tailored blanks. The corresponding strength ranges for hard or soft areas or strong or ductile areas can be derived from the table. All alloy components are given in % by weight, with residual iron and impurities resulting from melting being added to the corresponding hardenable steel alloy.

[0074]

Claims

1. A rear seat panel (1) of a motor vehicle body (14), comprising a rear portion of a footrest (2) and a rear seat support (3), wherein: The footrest (2) and the rear seat support (3) are staggered in height relative to each other in the vertical direction (Z) of the motor vehicle, and a channel section is molded in the footrest (2), and the footrest (2) and the rear seat support (3) are integrally constructed as a sheet metal deformation component via a connecting section (4) in one extruder stroke, wherein a reinforcement structure is constructed and sections are constructed with different strengths and / or different wall thicknesses, characterized in that a reinforcement bead (5) is molded at the transition from the rear seat (1) to the connecting section (4) and / or at the transition from the connecting section (4) to the footrest (2), the reinforcement bead extending substantially over more than 50% of the width of the rear seat (1), in particular over its entire width (7), wherein the bead is molded in a directional manner relative to the rear axle in cross section.

2. The rear seat panel (1) according to claim 1, characterized in that: The rear seat pan is manufactured as a heat-deformed and press-hardened component and is produced in one extruder stroke.

3. The rear seat panel (1) according to any one of claims 1 or 2, characterized in that: The high-strength region has a tensile strength of 1350 MPa or more.

4. A rear seat panel (1) according to any one of the preceding claims, characterized in that A soft region is formed with a tensile strength Rm of less than 1000 MPa, preferably less than 850 MPa.

5. The rear seat panel (1) according to any one of the preceding claims, characterized in that A reinforcing patch (6) is applied at least locally.

6. A rear seat panel (1) according to any one of the preceding claims, characterized in that The connecting section (4) has a high strength, in particular a strength greater than 1350 MPa, in particular greater than 1800 MPa.

7. A rear seat panel (1) according to any one of the preceding claims, characterized in that A longitudinal bead (13) is formed in the rear seat support (3), which extends in the longitudinal direction (X) of the vehicle over the entire length of the rear seat support (1) or a receptacle (10) for coupling a battery box, in particular a through-threaded bushing.

8. A rear seat panel (1) according to any one of the preceding claims, characterised in that A longitudinal bead (13) and / or a receptacle (10) for coupling a battery box, in particular a threaded through-thread bushing, are integrally formed in the footrest (4).

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