DE102017207623B3 - Body floor structure for a two-lane vehicle - Google Patents

Abstract

The invention relates to a body floor structure for a two-lane vehicle having a cross member arrangement (36) in the rear, consisting of a top side arranged on a floor panel between Heckradhäusern (5) extending Radhausquerträger (19) and one in the vehicle longitudinal direction (x ) is formed to the front directly adjacent rear cross member (37), which is constructed of a cross-sectionally cup-shaped cross member sheet metal part (39) with an open hollow profile, the formation of a closed hollow profile (47), in the vehicle longitudinal direction (x) front and rear Joining joints (F1, F2) is attached to the floor panel underside. According to the Radhausquerträger (19) is formed as a cross-sectionally circumferentially closed hollow profile part, the profile bottom (21) is connected to transmit power to the floor panel. The wheel arch cross member (19) is arranged around a clear longitudinal offset (Δx) behind the rear joint (F2) of the rear cross member (37), so that the rear joint (F2) in the vehicle vertical direction (z) upwards with respect to the Radhausquerträger (19 ) is free of cover.

Description

The invention relates to a body floor structure for a two-lane vehicle according to the preamble of claim 1.

When driving, especially when cornering, the rear side of a vehicle body is loaded with a directed to the vehicle longitudinal center axis torque at which the body rear side against the body front side twists. To increase the torsional stiffness, it is known to stiffen the inside corner area between a tail wheel house and a loading space side floor panel with a corner reinforcement. To further increase the torsional rigidity, the two opposing corner reinforcements can be connected to a Radhausquerträger.

A generic body floor structure has in the rear of a cross member arrangement, which is formed from a Radhausquerträger and a rear cross member. The Radhausquerträger is arranged on the upper side on a floor panel, while the rear cross member in the vehicle longitudinal direction to the front immediately adjacent thereto and executed in shell construction, that is from a cross-sectionally shaped cross member sheet metal part with open hollow profile, the formation of a closed hollow profile at joints the bottom plate bottom is connected. The cross member sheet metal part can be connected to the joints by spot welding. Especially with the spot welding a double-sided access of a spot welding gun to the joint of the rear cross member is required. Depending on the positioning of the wheel arch cross member arranged on the top side, however, such a tool access point welding tongs may be disturbed or completely covered to the joint of the rear cross member. In such a case, there are limitations in assembling the body-floor structure.

The object of the invention is to provide a body floor structure for a two-lane vehicle, which allows more degrees of freedom in assembly compared to the prior art.

From the DE 103 48 354 A1 a body floor structure is known in which a wheel arch cross member is provided to increase the torsional stiffness, which is supported on the two tail wheel houses. From the DE 102 06 476 A1 a Heckversteifungsstruktur is known in which a Radhausquerträger has a closed profile cross-section.

From the FR 1 151 659 A a generic body floor structure for a vehicle is known. Further bodywork floor structures are from the US Pat. No. 8,287,035 B2 , from the DE 10 2010 021 994 A , from the DE 103 48 354 A1 and from the EP 0 455 279 A1 known.

The object is solved by the features of claim 1. Preferred embodiments of the invention are disclosed in the subclaims.

The invention is based on the fact that the Radhausquerträger is realized in a conventional solution, as well as the rear cross member in shell construction, that is, as a deep-drawing produced space-consuming sheet metal part, whereby there is a risk that when assembling the body-floor structure of the Radhausquerträger joints at least partially covered by the underside of the rear cross member connected to the floor panel. Against this background, the Radhausquerträger is formed according to the characterizing part of claim 1 as a cross-sectionally circumferentially closed hollow profile part. Preferably, the Radhausquerträger a rectangular profile with a profile bottom, which is connected to transmit power to the floor panel, and a profile ceiling and two profile side walls. The wheel arch cross member may also be arranged around a clear longitudinal offset behind the rear joint of the rear cross member. In this case, the joints of the rear cross member in the vehicle vertical direction upwards with respect to the Radhausquerträger are arranged without overlap, so that a Störkonturfreier tool access the spot welding gun is guaranteed.

With the invention, rigidity goals of the body structure of a vehicle project are achieved by a wheel arch cross member in the area of the vehicle interior behind the second row of seats. The wheel arch cross member connects the two corner reinforcement sheet metal parts, which are located on the left and right of the wheel arches. The Radhausquerträger is designed as a self-contained profile and eingeschuht in the transition region to the corner reinforcement sheet metal parts at the wheel arches. By mutual through holes (ie tool access openings) in Radhausquerträger the Radhausquerträger can be connected by spot welding. Due to the closed profile, the available space can be used efficiently in terms of functional performance. No draft angles must be taken into account and no point flanges are needed to the bottom part. The closed profile of the Radhausquerträgers can also compensate for space-related hollow layers, for example in the area of the reserve trough cover. The closed Radhausquerträger hollow profile also allows a local reduction of the contact surface without significant deterioration in functionality and without an increase in wall thickness due to increased requirements, without adapting components of the environment. In the contact areas with the ground, the cross member is glued.

The closed Radhausquerträger hollow profile also allows a local reduction of the contact surface without significant deterioration in functionality, and a wall thickness increase due to increased requirements, without adapting components of the environment.

Alternatively, the Radhausquerträger can also be performed with flanges. As a result, laser welds can be avoided. Already planned two-sheet welding points in the body shell can be used to connect the cross member by means of three-sheet welding points. In addition, the carrier can also be connected to one another by means of alternating flange cuts.

By dividing the Eckverstärkungs sheet metal parts into a front and rear shell of the wheel arch can be inserted by means of conventional joining technique (ie spot welding) in the shell construction of Eckverstärkungs sheet metal parts. In order to ensure the spot weldability, holes are introduced into the closed profile alternately and offset. Due to the illustrated shape of the transition, the width of the assembly can be corrected at any time depending on the environment.

In the following, further aspects of the invention will be explained: For example, the wheel arch cross member can be connected in a force-transmitting manner to the floor panel in any manner. With regard to the closed profile cross section of the Radhausquerträgers may optionally be guaranteed no Störkonturfreier access a spot welding gun. In this case, it is preferred if the Radhausquerträger is glued to its bottom profile floor panel.

To increase the connection stiffness of the profile floor of the Radhausquerträgers can form a component-rigid three-layer structure together with the bottom plate and a rear edge flange of the cup-shaped cross member sheet metal part.

In a technical implementation, the floor panel is constructed of a front floor panel part in the vehicle longitudinal direction and a rear floor panel part. The front floor panel part is formed with vehicle rear seat mounting portions, while the rear floor panel part together with the rear wheel houses defines a rear luggage space. The two floor panel parts are connected to each other at their mutually facing Fügeflanschen in flanged connection (preferably by spot welding). The flange connection is positioned directly on the rear joint of the rear cross member. In addition, the two joining flanges of the floor panel parts together with the rear edge flange of the shell-shaped cross member sheet metal part can form a connection-resistant three-layer structure.

Depending on the sequence of joining the joint flange of the front floor panel part in the above-mentioned flange connection inside the vehicle, that is, the top side, be arranged. In this case, it is favorable for assembly, when the Radhausquerträger is arranged by a longitudinal offset behind the rear-facing trim edge of the joining flange of the front sheet metal part.

With regard to a perfect torsional stiffness of the rear carriage, it is preferred if the Inneneckbereich between the floor panel and the tail wheel house is stiffened with a Eckverstärkungs sheet metal part. The two opposite in the vehicle transverse direction Eckverstärkungs sheet metal parts can be connected to transmit power by means of the Radhausquerträgers. Each of the Eckverstärkungs sheet metal parts has a connection contour with a passage opening, in which the Radhausquerträger protrudes frontally. Preferably, the Radhausquerträger be in spot weld with the respective Eckverstärkungs sheet metal part.

To ensure a spot weldability, it is preferred if the respective corner reinforcement sheet metal part is made in two parts, namely from a front in the vehicle longitudinal direction sheet metal shell and a rear sheet metal shell. The two sheet metal shells can limit the passage opening in the assembled state, each with a partial opening edge.

The assembly of such a two-part executed Eckverstärkungs sheet metal part with the Radhausquerträger can be accomplished in the joining sequence described below: in a first joining step, a first profile side wall and the profile ceiling at the first spot welds with a partial connection contour of a first sheet metal shell can be spot welded. Subsequently, in a second joining step, the second profile side wall and the profile ceiling can be spot-welded to a partial connection contour of a second sheet metal shell of the corner reinforcement sheet metal part. The first and second spot welds are offset from one another in the vehicle transverse direction. In addition, the profile side walls may have tool access openings which enable a no-interference tool access of a spot welding gun to the first and second spot welds.

In a specific embodiment, the Radhausquerträger can be made from a flat sheet metal blank in a roll profiling. In this case, the Radhausquerträger be extended to facing sheet edges with outwardly projecting edge flanges. These can be brought into flanged connection (for example by spot welding) and also be connected to the bottom plate via a further joint.

Hereinafter, embodiments of the invention are described with reference to the accompanying figures.

• 1 in einer Seitenansicht mit teilweisem Aufriss ein zweispuriges Fahrzeug;
• 2 eine Karosserie-Bodenstruktur im Hinterwagen-Bereich des Fahrzeugs;
• 3 bis 5 jeweils Schnittansichten entlang der Schnittebene A-A aus der 2;
• 6 eine Anbindung des Radhausquerträgers an einem Eckverstärkungs-Blechteil;
• 7 und 8 jeweils Ansichten entsprechend der 6, die eine Fügefolge zur Anbindung des Radhausquerträgers an das Eckverstärkungs-Blechteil veranschaulichen.

Show it:

• 1 in a side view with partial elevation a two-lane vehicle;
• 2 a body floor structure in the rear area of the vehicle;
• 3 to 5 each sectional view along the sectional plane AA from the 2 ;
• 6 a connection of the Radhausquerträgers to a Eckverstärkungs sheet metal part;
• 7 and 8th each views according to the 6 which illustrate a joining sequence for connecting the Radhausquerträgers to the Eckverstärkungs sheet metal part.

In the 1 is shown a rear body-floor structure for a vehicle, in which a rear-side cargo space 1 through a rear floor panel part 13 and in the vehicle transverse direction y to the outside in each case by a tail wheel house 7 is limited, of which in the 1 only a wheel arch sheet metal part 5 is shown. The wheel arch sheet metal part 5 points in the 2 a distance around the rear wheel 7 extending peripheral wall 9 on, in the vehicle transverse direction y inwardly in a vehicle interior, vertical side wall 11 passes. The side wall 11 is on the bottom side, for example via welds on the rear floor panel part 13 tethered. Like from the 2 further, there is an inner corner area between the side wall 11 of the wheel arch sheet metal part 5 and the rear floor panel part 13 with a Radhausquerträgerversteifung 15 stiffened.

The Radhausquerträgerversteifung 15 points in the 2 a Radhausseitiges, shell-shaped Eckverstärkungs sheet metal part 17 on, in a transverse wheel arch crossmember 19 passes. The wheel arch crossbeam 19 is not manufactured in shell construction, but rather formed as a cross-sectionally circumferentially closed hollow profile part, in accordance with the 3 to 5 with a profile bottom 21 , a profiled ceiling 23 and a front and rear profile sidewall 25 . 27 ,

In the 3 is the rear floor panel part 13 in the vehicle longitudinal direction x forward with a front floor panel part 29 extended, at the not shown mounting sections 31 are designed for vehicle rear seats. The two floor panel parts 13 , 29 are at their mutually facing joining flanges 33 . 35 in a spot weld joint.

The wheel arch crossbeam 19 forms together with a rear cross member 37 a cross member arrangement 36 ( 1 ). In this is the rear cross member 37 in the vehicle longitudinal direction x forward immediately adjacent to the wheel arch cross member 19 arranged and added in a shell construction on the floor panel. The shell construction is characterized by a cross-section shell-shaped cross member sheet metal part 39 marked, with its front and rear edge flanges 41 . 43 at front and rear joints F1 . F2 to the underside of the front floor panel part 29 are connected. The connection is made by spot welding with the help of a not shown spot welding gun, the two-sided free access to the joints F1 . F2 requires. The underside cross member sheet metal part 39 limited together with a cross member contour 45 in the front floor panel part 29 is formed, a closed cross-section cavity 47 ,

Like in the 3 is shown, forming the two joining flanges 35 . 33 the floor sheet metal parts 13 , 29 together with the rear edge flange 43 of the cross member sheet metal part 39 a connection-resistant three-layer construction. In the same way forms the profile bottom 21 of the wheel arch crossmember 19 together with the rear floor panel part 13 and the rear edge flange 43 of the cross member sheet metal part 39 a connection-resistant three-layer construction. The wheel arch crossbeam 19 is in the 3 around a clear longitudinal offset Ax behind the rear joint F2 arranged, whereby a cover-free access of the spot welding gun to the joint F2 is guaranteed. In addition, the trim edge is also 32 of the joint flange 33 of the front sheet metal component 29 a clear longitudinal offset from the Radhausquerträger 19 spaced. In the joint F2 are the two joining flanges 35 . 33 the floor sheet metal parts 13 , 29 and the rear edge flange 43 the lower cross member sheet metal part 39 connected by spot welding. The wheel arch crossbeam 19 is on the other hand via an adhesive bond 49 at the rear floor panel part 13 Tied while also the rear edge flange 43 of the cross member sheet metal part 39 with the joining flange 35 the rear floor panel part 13 spot-welded.

The self-contained profile of the Radhausquerträgers 19 can also be a space-related hollow layer 48 For example, in the area of reserve trough cover compensate, as in the 4 or 5 is indicated. Consequently, the Radhausquerträger 19 in the area of the hollow layer 48 only with a locally greatly reduced contact surface in conjunction with the base plate, without resulting in a significant deterioration in functionality.

In the 5 is the wheel arch crossbeam 19 shown according to a second embodiment. Consequently, the Radhausquerträger 19 made of a flat sheet metal blank in a Rollprofilierverfahren. The in the 5 front profile sidewall 25 is at its lower edge with an outwardly angled edge flange 51 provided while the tread bottom 21 with another edge flange 53 is extended to the outside planar. The two edge flanges 51 . 53 are at the joint F2 connected with each other. In addition, the two edge flanges 51 . 53 of the wheel arch crossmember 19 , in the flange in the vehicle transverse direction y, have alternating Flanschbeschnitte. In this case, either alone, the lower edge flange 53 or alone the upper edge flange 51 of the wheel arch crossmember 19 spot-welded to the floor panel.

In the 6 is a corner reinforcement sheet metal part 17 shown that a connection contour 55 with a passage opening 57 in which the Radhausquerträger 19 protrudes with its front side. The wheel arch crossbeam 19 is in spot welding connection with the connection contour 55 , To ensure such a spot weldability is the corner reinforcement sheet metal part 17 in two parts from a front in the vehicle longitudinal direction x sheet metal shell 59 and a rearward in the vehicle longitudinal direction sheet metal shell 61 built up. Each of the two sheet metal shells 59 , 61 limits the passage opening 57 with a part-opening edge. In first spot welds P1 is the front profile sidewall 25 and possibly the profile ceiling 23 with a partial connection contour of the front sheet metal shell 59 spot-welded. In second spot welds P2 is the rear profile sidewall 27 and possibly the profile ceiling 23 with a partial connection contour of the rear sheet metal shell 61 spot-welded. In addition, the two profile side walls 25 . 27 Tool access holes 63 on, the interference contour-free tool access of the spot welding gun to the first and second spot welds P1 , P2 provide. The tool access openings 63 are offset from each other in the vehicle transverse direction y. Likewise, the first and second spot welds are as well P1 . P2 offset in the vehicle transverse direction y to each other.

In a joining sequence, in a first joining step ( 7 ) the front profile sidewall 25 in a spot welding process I with a partial connection contour of the front sheet metal shell 59 spot-welded, with the formation of the first spot welds P1 , Subsequently, in a second joining step ( 8th ) the rear profile sidewall 27 and the profile ceiling 23 with the partial connection contour of the rear sheet metal shell 61 spot-welded, forming the second spot welds P2 ,

LIST OF REFERENCE NUMBERS

1

hold

5

Wheelhouse sheet metal part

7

rear wheel

9

peripheral wall

11

vertical side wall

13

rear floor panel part

15

Radhausquerversteifung

17

Eckverstärkungs-sheet part

19

Radhausquerträger

21

Duct floor

23

profile ceiling

25, 27

Profile sidewalls

29

front floor panel part

31

mounting portion

32

Beschnittkante

33, 35

Fügeflansche the floor panel parts

36

Cross beam assembly

37

Fond crossmember

39

Crosspiece sheet metal part

41, 43

edge flanges

F1, F2

front and rear joints

45

Crossbeam contour

47

closed cavity

48

hollowed

49

adhesive bond

51, 53

edge flanges

55

connecting contour

57

Port

59

front sheet metal shell

61

rear sheet metal shell

63

Tool access holes

Ax

clear longitudinal offset

P1, P2

Spot welds

F1, F2

joints

Claims (10)

Body floor structure for a two-lane vehicle having a cross member arrangement (36) in the rear, consisting of a top side arranged on a floor panel between Heckradhäusern (5) extending Radhausquerträger (19) and in the vehicle longitudinal direction (x) forward directly adjacent rear cross member (37) is formed, which is constructed of a cross-sectionally shaped cross member sheet metal part (39) with an open hollow profile, the formation of a closed hollow profile (47), in the vehicle longitudinal direction (x) front and rear joints (F1, F2) is connected to the floor panel underside, wherein the Radhausquerträger (19) is formed as a cross-sectionally circumferentially closed hollow profile part, the profile bottom (21) is connected to the bottom plate force transmitting, and that the Radhausquerträger (19) by a clearance longitudinal offset (.DELTA.x ) is arranged behind the rear joint (F2) of the rear cross member (37), so that d The rear joint (F2) in the vehicle vertical direction (z) upwards with respect to the Radhausquerträger (19) is free of cover, characterized in that the bottom plate of a front in the vehicle longitudinal direction (x) bottom plate part (29), the mounting portions (31) for vehicle rear seats, and a rear base plate part (13) is constructed, which together with the Heckradhäusern (5) defines a rear-side cargo space (1), and that both bottom plate parts (13, 29) at their mutually facing Fügeflanschen (33, 35 ) are in flanged connection, directly at the rear joint (F2) of the rear crossmember (37), and that the two Fügeflansche (33, 35) of the floor panel parts (13, 29) together with a rear edge flange (43) of the cup-shaped cross member -Blechteils (39) form a three-layer construction. Body floor structure after Claim 1 , characterized in that the Radhausquerträger (19) is glued to its bottom profile (21) on the floor panel. Body floor structure after Claim 1 or 2 , characterized in that the profile bottom (21) of the Radhausquerträgers (19), the bottom plate and the rear edge flange (43) of the cup-shaped cross member sheet metal part (39) form a three-layer structure. Body floor structure after Claim 1 . 2 or 3 , characterized in that the joining flange (33) of the front base plate part (29) in the flange inside the vehicle, that is the upper side, and that a rearwardly pointing trim edge (32) of the joining flange (33) of the front bottom plate part (29) to another clear longitudinal offset from the Radhausquerträger (19) is spaced. Body floor structure according to one of the preceding claims, characterized in that the front and rear joint (F1, F2) of the rear cross member (37) spot welds are, and that the flange connection between the Fügeflanschen (33, 35) of the floor sheet metal parts (13, 29) also a spot welded joint. Body floor structure according to one of the preceding claims, characterized in that in a between the floor panel and the rear wheel house (5) spanned inside corner area a Eckverstärkungs sheet metal part (17) is arranged, and that the Eckverstärkungs sheet metal part (17) has a connection contour (55). with a passage opening (57), in which the Radhausquerträger (19) protrudes, and that the Radhausquerträger (19) in spot welding connection (I, II) with the Eckverstärkungs sheet metal part (17). Body floor structure after Claim 6 , characterized in that to ensure a spot weldability (I, II) the corner reinforcement sheet metal part (17) is constructed in two parts from a vehicle longitudinal direction (x) front sheet metal shell (59) and a rear sheet metal shell (61), of which each sheet metal shell ( 59, 61) delimits the passage opening (57) with a part-opening edge. Bodywork floor structure according to one of the preceding claims, characterized in that the Radhausquerträger (19) with the profile bottom (21), a profile ceiling (23) and a front and a rear profile side wall (25, 27) forms a rectangular profile. Body floor structure after Claim 8 , characterized in that in a first spot welding point (P1) a first profile side wall (25) and optionally the profile ceiling (23) with a partial connection contour of a first sheet metal shell (59) is spot welded, and in a second spot weld (P2) a second Profile side wall (27) and possibly the profile ceiling (23) with a partial connection contour of a second sheet metal shell (61) is spot welded, and that in particular in the two profile side walls (25, 27) tool access openings (63) are formed, the tool access a spot welding gun to the first and second spot welds (P1, P2). Body floor structure according to one of the preceding claims, characterized characterized in that the Radhausquerträger (19) is produced from a sheet metal blank in a Rollprofilierverfahren, and / or that the Radhausquerträger (19) on facing sheet metal blanks edges is extended with outwardly projecting edge flanges (51, 53) which are flanged together and / or are connected to the floor panel.

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