CN108725597A - Underbody structure for vehicle - Google Patents

Abstract

The invention relates to an underbody structure for a vehicle, said underbody structure having an underbody assembly delimiting the interior space of the vehicle, said underbody assembly having an underbody panel (1) and a seat cross member (5), said seat The seat cross member (5) is connected in the vehicle transverse direction (y) to the door sill (3) on the outside of the vehicle with the seat receiver panel (11) on the rocker side in the middle, wherein the seat receiver panel on the rocker side (11) Angle profiles in cross section, which are attached to the door sill (3) by means of horizontal mounting arms (13) and to the bottom panel by means of vertical support arms (17) (1), and wherein the seat cross member (5) projects with its outer end in the vehicle transverse direction (y) through the through-opening (21) of the seat receptacle plate (11) on the rocker side into the The rocker side seat receiver panel (11) defines a cavity (25) bounding it.

Description

Underbody structures for vehicles

technical field

The invention relates to an underbody structure for a two-track vehicle according to claim 1 or the preamble to claim 5 .

Background technique

In common practice, the underbody structure of such vehicles is designed as a welded assembly of sheet metal molded parts, in which, viewed in the transverse direction of the vehicle, the underbody panel is delimited by the side sills. Furthermore, a central tunnel extending along the longitudinal center plane of the vehicle is formed in the underbody panel. The seat cross member extends between the central tunnel and each side sill, the seat cross member is connected to the central tunnel with the tunnel-side seat receiver panel in the middle, and the sill-side seat receiver panel The case in the middle is attached to the door sill. The two seat receiver panels carry the vehicle seats. The seat cross member supported between these seat receiver panels serves to stiffen the substructure in order to absorb lateral impact forces in the event of a side impact.

The seat receiver panel must therefore meet the following requirements: In normal driving operation, the seat receiver panel must absorb forces exerted downwards in the vehicle height direction and transmit them to the underbody component. In the event of a lateral impact, in particular the vehicle outer, rocker-side seat receiver panel must be incorporated together with the seat cross member into a transverse load path via which impact forces can be transmitted to the side facing away from the impact.

Contents of the invention

The technical problem addressed by the present invention is to provide an underbody structure in which the above-mentioned requirements can be met with simple production technology and with reduced component costs.

The technical problem is solved by the technical features of claim 1 or 5 . Preferred refinements of the invention are disclosed in the dependent claims.

In related prior art, the sill-side seat receiver panel is an angle profile in cross-section, which is attached to the door sill by means of a horizontal mounting arm and to the bottom panel by means of a vertical support arm, wherein, The seat cross member projects with its outer end in the vehicle transverse direction through the through-opening of the rocker-side seat receiver panel into the cavity delimited by the rocker-side seat receiver panel.

Such an underbody structure is known, for example, from patent document EP 1 382 514 A1. Further patent document DE 10 2011 010 992 A1 discloses a seat cross member installed in a vehicle which is designed with a deformation element for absorbing deformation energy introduced in the direction of the seat cross member. Another underbody structure is known from CN 204587044, in which a seat cross member extends between the side sills and the central tunnel of the vehicle interior.

According to the characterizing part of claim 1 , the connecting profile material is formed uniformly and in one piece on the vehicle outer end of the seat cross member, on which connecting profile the horizontal mounting arm of the rocker-side seat receptacle panel is supported, Simultaneously the connection position is formed. In this way, a separate support plate can be dispensed with, which reinforces the rocker-side seat receptacle plate during normal vehicle operation in order to absorb forces acting in the direction of vehicle height. As an alternative, according to the invention, the supporting effect is implemented directly via the connecting contour formed on the seat cross member.

In a technical implementation, the seat cross member can be U-shaped in cross-section and have a profile base pointing away from the ground and profile sides projecting from the profile base. The profile is supported laterally on the bottom panel. For this purpose, the profile sides have laterally outwardly bent edge flanges which are frictionally connected, in particular welded, to the base plate. The aforementioned connecting contour is preferably a contact surface, in particular planar, in the bottom of the seat cross member profile. In the assembled position, the contact surface abuts in the connection plane parallel to the contact surface plane of the mounting arm of the seat holder plate and is in particular frictionally connected, ie welded, thereto.

The vehicle-outer end of the seat cross member can preferably be spaced from the vehicle-outer rocker by a greater lateral offset. With respect to a lateral impact, the seat cross member can be extended towards the vehicle exterior by means of the reinforcement panel, that is to say at the same time at least partially across the aforementioned lateral offset. The reinforcement panel on the outside of the vehicle can be non-positively connected (that is to say welded) to the seat cross member at the connection point. In addition, the reinforcement panel can be assembled in a simple manner, but without connection, ie without a force-transmitting connection, to the door sill, the seat receiver panel on the side of the door sill, and the floor panel. position. The reinforcement panel is preferably a sheet metal profile, which is likewise configured as a U-shaped profile, which is inserted telescopically into the vehicle-outer end of the seat cross member, wherein the profile side of the reinforcement panel The section can be welded to the profile side of the seat cross member at connection points A2, A3 (joint position). In contrast to this, the reinforcement panel can be spaced apart from the bottom of the seat cross member profile and the bottom panel via a vertical assembly gap. The reinforcing plate can likewise be spaced from the side sills via a transverse assembly gap.

In order to obtain favorable deformation behavior in a lateral impact, the stiffening panel on the outside of the vehicle can have a target deformation position which can preferably be located outside the above-mentioned engagement point in the transverse direction of the vehicle. This results in a transverse load path in the event of a side impact in which the side impact forces are first transmitted via the door sill into the stiffening panel on the outside of the vehicle and then continue in the engaged position in the direction of a direction away from the impact. The direction of the side is transferred into the seat cross member.

As mentioned above, the seat cross member is configured with a connection contour which supports the horizontal mounting arm of the rocker-side seat receiver panel in the first connection position. Furthermore, the vertical support arms of the rocker-side seat receptacle panel can be non-positively connected to the floor panel by means of edge flanges bent towards the vehicle interior. In this case, the edge flange of the seat cross member and the edge flange of the seat receiver can be engaged in a force-transmitting manner in the second and third connection positions in order to provide a connection between the seat receiver panel on the rocker side and the seat cross member. Further reinforcement between the ends of the vehicle exterior.

A preferred tunnel-side connection of the vehicle-inner end of the seat cross member is described below, which can be realized independently of the above-mentioned vehicle-outside connection of the seat cross member, but can preferably be used in combination with the above-mentioned vehicle-outside seat cross-member connection: The seat cross member can thus be connected to the center tunnel in the transverse direction of the vehicle with a vehicle interior tunnel-side seat receiver panel arranged in between. Seat receiver panels inside the vehicle (and seat receiver panels outside the vehicle) can have corner profiles attached to the center tunnel with horizontal mounting arms and to the bottom panel with vertical support arms . In contrast to the seat receiver panel on the outside of the vehicle, the vertical support arms of the tunnel-side seat receiver panel on the vehicle interior are designed without a through-opening for the seat cross member, that is to say as a closed surface. The seat cross member is connected by its vehicle-interior end to a vertical support arm of the tunnel-side seat holder panel at the connection point. In order to achieve the above-mentioned connecting position, the profile bottom of the seat cross member is extended towards the vehicle interior with a connecting flange which is friction-fittingly connected (preferably welded) to the support arm of the channel-side seat holder panel .

In order to be able to transmit the crash forces smoothly to the side facing away from the crash in the event of a lateral crash, it is preferred that the reinforcement panel of the vehicle interior is positioned in a cavity delimited by the tunnel-side seat receiver panel. The reinforcing plate can preferably be connected flush with the seat cross member in the transverse direction of the vehicle, but separated from the end of the seat cross member in the vehicle interior with the vertical support arm in the middle. The reinforcing panel of the vehicle interior can be connected force-transmittingly only at the inner corner area between the central tunnel and the floor panel in a manner advantageous in terms of production technology, however, the reinforcing panel of the vehicle interior is not connected to the seat accommodation of the vehicle interior The plate parts are positioned without connection, that is to say without a force-transmitting connection.

As mentioned above, the seat cross member can be connected to the seat receptacle panel in the vehicle interior by means of the connecting flange, ie simultaneously forms the first connection point. With regard to further stiffening of the underbody structure, it is preferred that the seat cross member edge flanges and the seat receiver edge flanges protruding from the support arms of the tunnel-side seat receiver panels at the second and third connection Positionally force-transmissively joined (that is to say welded).

Due to the underbody structure described above it is possible to prefabricate a pre-assembled unit which is formed by a seat cross member, on the vehicle interior end of the seat cross member, the aisle-side seats are connected at the three connection points Holds boards. At the vehicle-outside end of the seat cross member, the vehicle-outside seat receptacle panel is connected at the same three connection points described above. During assembly, this prefabricated pre-assembled unit is then placed on the underbody structure and connected to the bottom panel and the center tunnel and Door sill welding.

Description of drawings

Embodiments of the present invention are described below in conjunction with the accompanying drawings.

In the attached picture:

Figure 1 shows a double-track vehicle in a top view with partial cutaway;

FIG. 2 shows, in an enlarged detailed top view, the rocker-side seat receiver panel, the seat cross member and the tunnel-side seat receiver panel installed in the underbody structure;

Figure 3 shows a perspective view of the connection of the seat cross member on the door sill;

Figure 4 shows a sectional view taken along the section A-A according to Figure 3; and

FIG. 5 shows a cross-sectional view of the connection of the seat cross member to the center tunnel.

Detailed ways

FIG. 1 shows a plan view of a double-track vehicle, the vehicle interior of which is delimited on the underside by an underbody component of the bodywork. The underbody module has an underbody panel 1 which extends in the vehicle transverse direction y between side sills 3 . It can further be seen from FIG. 1 that the seat cross member 5 extends on the floor panel 1 in the vehicle transverse direction y. Inside the vehicle, the seat cross member 5 is connected to a central tunnel 7 extending along the central longitudinal axis L of the vehicle ( FIG. 2 ) with the seat receiver panel 6 of the vehicle interior in the middle. On the outside of the vehicle, the seat cross member 5 is connected to the side sills 3 with the seat receiver panel 11 on the outside of the vehicle in the middle. The seat holder panel 11 of the vehicle exterior is designed in cross section approximately like an angle profile, more precisely with a seat holder mounting arm 13 which transitions at a longitudinal edge 15 into Vertical support arm 17. In FIG. 2 , the horizontal seat receiver mounting arm 13 is welded to the side sill 3 via an edge flange 14 , while the vertical support arm 17 of the seat receiver panel 11 on the vehicle exterior is welded via an edge flange 18 On bottom panel 1. As further shown in FIG. 2 or FIG. 3 , a connection point 19 for mounting a vehicle seat is provided by way of example in the horizontal seat holder mounting arm 13 .

The vehicle-interior, aisle-side seat receiver panel 6 is constructed substantially identically to the vehicle-outer seat receiver panel 11 . Accordingly, the support arm 17 , the mounting arm 13 and the edge flange 18 of the tunnel-side seat receiver panel 6 are provided with the same reference numerals as the seat receiver panel 11 of the vehicle exterior.

It can further be seen from FIG. 2 that a through-opening 21 is formed in the vertical support arm 17 of the seat receiver panel 11 on the vehicle exterior, which extends in the vehicle height direction z as far as the seat receiver panel 6 on the rocker side. The above-mentioned longitudinal edge 15 of. The seat cross member 5 projects with its vehicle outer end through the through-opening 21 into a cavity 25 delimited by the rocker-side seat receiver panel 11 , the floor panel 1 and the side rocker 3 .

The seat cross member 5 is designed as a U-shaped profile-shaped sheet metal part, more precisely with an upper profile base 27 which transitions into a side 29 protruding from the profile base 27 . The side part 29 has a laterally outwardly bent edge flange 31 which is welded to the bottom plate 1 . A connecting contour 30 ( FIG. 4 ) is integrally and integrally formed on the vehicle outer end of the seat cross member 5 , on which the horizontal mounting arm 13 of the rocker-side seat receptacle panel 11 is supported, At the same time, the first connection location A1 is formed. The connection contour 30 is a contact surface formed flat in the seat cross member profile bottom 27 , which contacts the mounting arm surface of the seat receptacle panel 11 on the rocker side in a substantially horizontal connection plane E ( FIG. 4 ). 28 rests parallel to the plane and is in particular welded thereto. For further reinforcement, the seat cross member edge flanges 31 are respectively welded to the edge flanges 18 of the rocker-side seat receiver panel 11 to simultaneously form a second connection point A2 and a third connection point A3 ( FIG. 2 or 3 ).

The vehicle-outer end of the seat cross member 5 is spaced from the side rocker 3 by a relatively large lateral offset Δy ( FIG. 1 or FIG. 2 ). Furthermore, the seat cross member 5 is extended towards the vehicle exterior by means of a reinforcement panel 33 on the vehicle exterior. The reinforcement panel 33 on the outside of the vehicle extends adjacent to the side sill 3 while partly spanning the aforementioned lateral offset Δy and is spaced from the side sill 3 by a small assembly gap m ( FIG. 3 or 4 ). The reinforcement panel 33 of the vehicle exterior can likewise be U-shaped in cross-section and have a profile base 35 facing away from the ground and profile sides 37 protruding from the profile base 35 . The profile side 37 of the vehicle exterior reinforcement panel 33 is connected in a force-transmitting manner to the profile side 29 of the seat cross member 5 at the joining point F ( FIG. 4 ). In order to obtain favorable deformation behavior in a side impact, the stiffening panel 33 of the vehicle exterior shown in FIG. 4 has a theoretical deformation position D indicated by a dotted line. The desired deformation position D is located laterally outward in the vehicle transverse direction y at the engagement position F at which the seat cross member 5 is fastened to the reinforcement panel 33 . This creates a transverse load path L in the event of a side impact, in which the forces of the side impact are transmitted via the rocker 3 into the reinforcement panel 33 on the outside of the vehicle, and subsequently in the engagement position F the seat The transmission continues in the direction of the side facing away from the collision in the crossbeam 5 .

Otherwise, however, the reinforcement panel 33 protruding into the interior of the seat cross member 5 is not connected to the side sill 3 , the seat receptacle panel 11 on the sill side and the floor panel 1 , that is to say no energy is present. A force-transmitting connection. Instead, the reinforcement panel 33 of the vehicle exterior is spaced from the seat cross member profile bottom 27 and from the floor panel 1 by vertical installation distances Δz ₁ , Δz ₂ ( FIG. 4 ). The vehicle-outer end face of the reinforcement panel 33 is spaced from the rocker 3 in the same manner via the aforementioned assembly gap m.

The connection of the end of the seat cross member in the vehicle interior to the tunnel-side seat receiver panel 6 is described as follows: In contrast to the rocker-side seat receiver panel 11 , the support arms 17 of the tunnel-side seat receiver panel 6 are configured It does not have a through-opening 21 for the seat cross member 5 , that is to say it is designed as a closed surface. On the closed-surface support arm 17, the connecting flange 39 (FIG. 2 or FIG. 5) is welded to the vertical support arm 17 of the aisle-side seat holder panel 6, to be precise at the same time forming the first connection point B1 (figure 2). An upwardly bent connecting flange 39 is formed on the profile bottom 27 of the seat cross member 5 and extends the profile bottom 27 beyond the end of the seat cross member in the vehicle interior. With the simultaneous formation of the second connection point B2 and the third connection point B3, the edge flange 31 of the seat cross member 5 protrudes from the edge of the tunnel-side seat receiver panel 6 at the end of the seat cross member in the vehicle interior. Edge 18 is welded. Furthermore, the end of the seat cross member in the vehicle interior is spaced from the vertical support arm 17 of the tunnel-side seat holder panel 6 by a further assembly gap m ( FIG. 5 ).

A reinforcement panel 41 ( FIG. 2 or FIG. 5 ) of the vehicle interior is positioned in the interior cavity 25 delimited by the channel-side receiver panel 6 , the central channel 7 and the bottom panel 1 , said reinforcement panel 41 being fixedly connected On the inner corner area between the bottom panel 1 and the central channel 7 . Otherwise, however, the vehicle interior reinforcement panel 41 has no connection, ie, no force-transmitting connection, to the vehicle interior seat receiver panel 6 .

The rocker-side seat receiver panel 11 , the tunnel-side seat receiver panel 6 and the seat cross member 5 form an H-shaped preassembly unit which can be preinstalled independently of the underbody structure. In the pre-assembled unit, the seat cross member 5 is connected to the rocker-side seat receiver panel 11 at its vehicle exterior connection points A1, A2 and A3 and at its vehicle interior connection points B1, B2 and B3 The top is connected to the aisle-side seat holder panel 6 . Furthermore, the reinforcement panel 33 on the vehicle exterior is welded to the seat cross member 5 at the joining point. The welded assembly thus constructed is placed on the underbody structure as a whole and welded to the underbody structure.

In the event of a side impact, the seat cross member 5 thus presses with its vehicle interior end against the support arm 17 of the tunnel-side seat holder panel 6 , after exhausting the assembly gap m, so that the vehicle interior The reinforcement plate 41 engages in the cross member load path L ( FIG. 4 ) and conducts the transmitted impact force onward in the vehicle transverse direction y to the side facing away from the impact.

In the event of a side impact, the stiffening plate 41 transmits the forces transmitted via the seat cross member 5 into the central tunnel 7 in a positive manner like a bumper: part of the force is absorbed by the stiffening plate 41 through deformation, and the remaining force is connected via the tunnel Definitely lead into the central channel 7. A possible fracture of the central channel 7 , for example, when loads are introduced directly through the seat cross member 5 is thus avoided.

List of reference signs

1 Bottom plate

3 door sills

5 seat beam

6-way side seat holder panel

7 central aisle

11 Panel for seat receiver on sill side

13 Mounting arm

14 Edge flange

15 longitudinal edges

17 Vertical Support Arm

18 edge flange

19 Connection position

21 through opening

25 cavities

27 Seat crossmember profile bottom

28 Mounting arm contact surface

29 Seat cross member side

30 Connection profiles

31 Seat cross member edge flange

33 Reinforcing panels on the exterior of the vehicle

35 Bottom of the profile for reinforcement panels on the exterior of the vehicle

37 Profile side of stiffening panel for vehicle exterior

39 Connection flange

41 Reinforcement panels in the vehicle interior

A1, A2, A3 connection positions

B1, B2, B3 connection positions

L Lateral load path

E connection plane

Δz ₁ , Δz ₂ , m assembly clearance

Δy lateral offset

Claims (8)

1. a kind of underbody structure for vehicle, the underbody structure has the bottom for limiting inner space boundary Parts, the base assemblies have base plate member (1) and seat beam (5), and the seat beam (5) is along lateral direction of car (y) It is connected in the case where threshold side seat receiving member plate (11) is located at centre on the threshold vehicle (3) of outside vehicle, wherein door Sill side seat receiving member plate (11) is angle section in cross-section, and the angle section is connected to by horizontal installing arm (13) It on the threshold vehicle (3), and is connected on the base plate member (1) by vertical support arm (17), and wherein, it is described Seat beam (5) passes through the pass through openings of threshold side seat receiving member plate (11) with it along the outboard end of lateral direction of car (y) (21) it stretches into the cavity (25) by threshold side seat receiving member plate (11) limited boundary, which is characterized in that connection profile (30) material uniformly and integrally shapes on the end of the outside vehicle of the seat beam (5), threshold side seat The arm (13) that is horizontally mounted of receiving member plate (11) is supported on link position (A1) on the connection profile (30).

2. underbody structure as described in claim 1, which is characterized in that the seat beam (5) is configured to profile and takes the shape of the letter U And the proximate matter side (29) that there is the proximate matter bottom (27) of bottom shape and protruded from proximate matter bottom (27), the proximate matter side Portion (29) is supported on the base plate member (1), and the connection profile (30) is especially constructed to plane formula in seat cross Contact surface in beam type material bottom (27), the contact surface in connection plane (E) with the seat receiving member plate (11) Installing arm contact surface (28) plane parallelly reclines and connects with capable of transmitting power, especially with the seat receiving member plate (11) Installing arm contact surface (28) welding.

3. underbody structure as described in claim 1 or 2, which is characterized in that the outside vehicle of the seat beam (5) By free transversal displacement, (Δ y) is spaced with the threshold vehicle (3), and the seat beam (5) is by reinforcing for end Plate (33) extends towards outside vehicle, and simultaneously at least partly across the transversal displacement (Δ y), and in particular, institute It states reinforcing plate (33) to be connected on the seat beam (5) while power can be transmitted on bonding station (F), however, the reinforcing Plate (33) and the threshold vehicle (3), threshold side seat receiving member plate (11) and the base plate member (1) are connectionless, also It is to say that there is no the connections that can transmit power.

4. by the underbody structure described in one of Claims 2 or 3, which is characterized in that the proximate matter side of the seat beam (5) There is the rim lip (31) of projection laterally outward, the rim lip (31) to connect, especially weld with capable of transmitting power in portion (29) It is connected on the base plate member (1), and the vertical support arm (17) of threshold side seat receiving member plate (11) is by towards vehicle The rim lip (18) of inside bending is connected, is especially welded on the base plate member (1) in which can transmit power, and in particular, The seat beam rim lip (31) and the seat receiving member rim lip (18) can transmit on link position (A2, A3) It engages to power, especially weld.

5. a kind of underbody structure, underbody structure especially as described in one of preceding claims, with bottom plate Part (1) is configured with the centre gangway (7) extended along longitudinal direction of car (x), the body bottom knot in the base plate member (1) Structure also has at least one seat beam (5), and the seat beam (5) is along lateral direction of car (y) in channel side seat receiving member plate Part (6) is connected in the case of being located at centre on the centre gangway (7), and the seat receiving member plate (6) has angle section Cross section, the angle section are connected to by horizontal installing arm (13) on the centre gangway (7), and by vertical branch Brace (17) is connected on the base plate member (1), which is characterized in that the seat beam (5) by its vehicle interior end Portion is connected on link position (B1) in the vertical support arm (17) of channel side seat receiving member plate (6), and channel side The vertical support arm (17) of seat receiving member plate (6) is configured to the pass through openings for not having for the seat beam (5) (21), that is it is constructed to sealing surface formula.

6. underbody structure as described in claim 5, which is characterized in that the reinforcing plate (41) of vehicle interior be located in by In the cavity (25) of channel side seat receiving member plate (6) limited boundary, and the reinforcing plate (41) is along lateral direction of car (y) Arranged with flushing with the seat beam (5), and in the case where vertical support arm (14) is located at centre with the seat cross Beam (5) separates.

7. underbody structure as described in claim 6, which is characterized in that the reinforcing plate (41) of vehicle interior can transmit power Ground is connected on the internal corner region between centre gangway (7) and base plate member (1), however with the seat receiving member of vehicle interior Plate (6) is connectionless, that is there is no the connections that can transmit power.

8. pressing underbody structure described in claim 5 or 6, which is characterized in that the seat receiving member plate (6) of vehicle interior Vertical support arm (14) there is the rim lip (18) that be bent towards outside vehicle, the rim lip (18) to connect, especially weld It is connected on the base plate member (1), and in particular, the seat beam rim lip (31) and seat receiving member edge Flange (18) is engaged on link position (B2, B3), is especially welded in which can transmit power.