DE102017201063B4 - Body floor structure for a two-lane vehicle - Google Patents

Abstract

Body floor structure for a two-lane vehicle, with a floor panel part (3) in which a downwardly open central tunnel (5) extending in the longitudinal direction (x) of the vehicle is formed, the floor panel part (3) having a footwell (1) delimiting, edgewise aligned heel plate part (13) merges into a horizontally aligned rear sheet metal part (15) on which rear seats can be mounted, the rear sheet metal part (15) together with the heel sheet part (13) having a cross member (19) running in the transverse direction of the vehicle (y) Hollow profile (21) closed in cross section, and wherein the heel plate part (13) has a connection contour (45) to which the floor plate part (3) with its central tunnel (5) is attached, the central tunnel (5) being offset by a height (Δz1 ) is attached below the cross member (19) on the heel plate part (13), characterized in that a total of exactly two reinforcing elements (51) are provided, which the center tunnel (5) under bridging the height offset (Δz1) in a force-transmitting manner with the cross member (19) and that the two reinforcing elements (51) are spaced from one another in the transverse direction of the vehicle (y), and that each of the reinforcing elements (51) on the respective outer edge of the center tunnel top (7 ) encompasses an outer corner area (49) which is formed by the center tunnel top (7) and the heel plate part (13).

Description

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

The vehicle interior of such a vehicle is delimited at the bottom in the vertical direction of the vehicle by a floor panel part in which a center tunnel, which is open at the bottom, runs in the longitudinal direction of the vehicle. The floor panel part is connected with its center tunnel in the vehicle rear area to an upright heel panel part, which merges with the rear of the vehicle into a horizontal rear panel part on which the rear seat bench can be mounted.

Such a generic body floor structure for a two-lane vehicle is known from JP H06-115460A. A flat intermediate sheet metal part extends continuously in the transverse direction of the vehicle within the seat cross member cavity and is in flange connection with the seat cross member.

the end EP 2 390 164 A2 it is known that between the heel plate part delimiting a footwell to the rear and a strike plate part, a cross member with a hollow profile closed in cross section is formed. The cross member extends in the transverse direction of the vehicle between the laterally outer side sills. In addition, the heel plate part has a U-shaped, downwardly open sheet metal cutout, to which the upper side of the central tunnel and the side flanks of the central tunnel are connected. In the EP 2 390 164 A2 the upper side of the center tunnel is connected directly to the cross-member that provides rigidity. This leads to a high stiffness of the connection between the center tunnel and the cross member, which improves the vehicle acoustics and reduces the excitation of vibrations in the front seats. In addition, the EP 2 390 164 A2 the center tunnel is brought up to the heel plate with approximately the same tunnel height. This results in a loss of comfort in the rear of the vehicle, in particular when entering / passing through where the center tunnel is perceived as an interfering contour.

From the DE 10 2008 047 462 A1 A further body floor structure is known in which a transverse heel element, which consists of an angular reinforcement beam, adjoins a center tunnel of the vehicle to the rear in the vehicle longitudinal direction.

Further body floor structures are from the US 7 204 547 B2 , from the U.S. 5,102,187 A and from the US 6 299 240 B1 famous.

The object of the invention is to provide a body floor structure for a two-lane vehicle that enables increased comfort in the rear of the vehicle and at the same time provides perfect vehicle acoustics and reduced vibration excitation of the front seats, while ensuring a maximum tank volume of the fuel tank.

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

The invention is based on the fact that a reduction in the tunnel height of the center tunnel in the rear of the vehicle results in an increase in comfort when getting on / through. However, such a reduction in the tunnel height leads to the central tunnel being attached at a distance (that is to say by a height offset) below the cross member on the heel plate part. In this case, there is no direct connection of the center tunnel to the cross member, which would impair the vehicle acoustics and increase the excitation of vibrations in the front seats. Against this background, at least one reinforcing element is provided according to claim 1, which connects the lowered (that is, provided with reduced tunnel height) central tunnel to the cross member in a force-transmitting manner bridging the above-mentioned height offset. This results in an increase in rigidity in the transition area from the center tunnel to the area of the heel plate part. For this purpose, additional profile-forming components are used as reinforcement elements. The reinforcement elements are profiled right up to the area of the heel part. In order to create an effective reinforcement element profile with a view to saving installation space, a connection point for the fuel tank, for the exhaust system and / or for the heat shielding plate can be lowered. The installation space for a screw spindle, which must be kept free for the joining, can be used for the profile formation of the reinforcement element described below by lowering the connection point.

Further aspects of the invention are described below: For example, the heel plate part can have a connection contour for connecting the center tunnel. The connection contour can be a U-shaped, downwardly open sheet metal cutout in the heel sheet part. At its edges, joining flanges can be placed, which are connected to the upper side of the central tunnel and the central tunnel side flanks protruding downward therefrom.

At the transition from the center tunnel to the heel plate part, the result is from the underside of the vehicle considered, an outside corner area between the center tunnel top and the heel plate part. The reinforcement element is an angle profile part that engages around the outer corner area from below.

In a technical implementation, the reinforcement element, viewed in the transverse direction of the vehicle, does not engage in the middle under the upper side of the center tunnel, specifically in view of the limited installation space. Rather, according to the invention, a total of exactly two reinforcing elements are provided, which are spaced apart from one another in the transverse direction of the vehicle. Each of the two reinforcement elements encompasses the respective outer edge of the vehicle, to which the center tunnel side flanks adjoin, and the center tunnel upper side encompasses the outer corner area. The two reinforcement elements can have the same construction or a different component geometry, depending on the installation space requirement.

The rear sheet metal part has a large-area horizontal mounting section on which the rear seats can be mounted. In a preferred technical implementation, the horizontal mounting section of the rear sheet metal part merges in the vehicle longitudinal direction forward at a front edge into a transverse support contour. Together with a corresponding cross member contour of the heel plate part, this forms the cross member already mentioned. The rear sheet metal part cross member contour can have a rear cross member side wall which is angled vertically downward from the front edge. In the further course, towards the front of the vehicle, this can merge at a transition edge into a horizontally aligned cross-member floor. A downwardly turned edge flange can protrude from the cross member base, which is in flat contact with the heel plate part and is connected to it, for example by spot welding. The trimmed edge or lower edge of the heel plate part edge flange is spaced apart from the upper side of the center tunnel by means of a height offset.

The heel plate part cross member contour has a vertically aligned front cross member side wall which merges at an upper transition edge in the further course towards the rear of the vehicle into a horizontal cross member top wall. The cross member top wall of the heel plate part can be connected to the rear plate part with an edge flange. The heel sheet metal part edge flange is preferably connected directly to the horizontal mounting section of the rear sheet metal part in the region of the rear sheet metal part front edge. This results in a substantially flush transition between the horizontal rear sheet metal part mounting section and the horizontal cross member top wall of the heel sheet metal part.

In the above sheet metal part structure, an inner corner area is spanned between the cross member bottom of the rear sheet metal part and its edge flange, which is turned downwards. The reinforcement element extends upward in the vertical direction of the vehicle, preferably with a contour matched to the above inner corner area, up to abutment with the cross member floor of the rear sheet metal part. In addition, the reinforcement element can be in continuous contact as well as in continuous force-transmitting connection with the crossbeam base, the edge flange set off from it and the heel plate part.

With regard to a rigid construction of the reinforcement element, it is preferred if the reinforcement element is a sheet metal angle profile part. The angle profile part can preferably have profile flanges running around the edge, which are connected to the center tunnel, to the heel plate part and / or to the rear plate part (for example by spot welding). To increase the rigidity, the angle profile part can also have a shell-shaped, stiffening box profile that is surrounded by the above profile flanges. In the installed position, the box profile of the angle profile part, together with the center tunnel, the heel sheet part and / or the rear sheet metal part, can form a substantially closed, stiffness-imparting cavity (that is to say hollow profile).

The box profile of the reinforcement element can provide a mounting wall in a double function, on which functional elements can be mounted, for example an exhaust system and / or a heat shielding plate and / or a fuel tank. The mounting wall is preferably a horizontal profile floor pointing downwards in the vertical direction of the vehicle, which is easily accessible from below for tools and for the add-on parts when the vehicle is being assembled. The horizontal profile bottom of the box profile of the reinforcement element is spaced from the cross member bottom of the rear sheet metal part by a height offset, which results in installation space that can be taken up by the box profile of the reinforcement element.

In the above embodiment, the reinforcement element provides at least one central connection point at which the fuel tank - viewed in the transverse direction of the vehicle - is mounted approximately in the center of the vehicle. In addition, the fuel tank is mounted at connection points on the outside of the vehicle directly on the crossmember floor of the crossmember.

An exemplary embodiment of the invention is described below with reference to the accompanying figures.

• 1 ein zweispuriges Fahrzeug in einer Seitenansicht mit teilweisem Aufriss;
• 2 eine Karosserie-Bodenstruktur des Fahrzeugs in einer perspektivischen Darstellung;
• 3 in einer vergrößerten Schnittdarstellung des Übergangsbereichs zwischen dem Mitteltunnel und dem Fersenblechteil entlang einer Schnittebene A-A aus der 2;
• 4 den Übergangsbereich zwischen dem Mitteltunnel und dem Fersenblechteil in einer perspektivischen Darstellung von der Fahrzeugunterseite; und
• 5 eine Teilperspektivansicht gemäß einem weiteren Ausführungsbeispiel.

Show it:

• 1 a two-lane vehicle in a side view, partly in elevation;
• 2 a body floor structure of the vehicle in a perspective illustration;
• 3 in an enlarged sectional view of the transition area between the center tunnel and the heel plate part along a sectional plane AA from FIG 2 ;
• 4th the transition area between the center tunnel and the heel plate part in a perspective view from the underside of the vehicle; and
• 5 a partial perspective view according to a further embodiment.

As from the 1 shows is the rear footwell 1 of the vehicle in the vehicle vertical direction z downwards through a floor panel part 3 limited, in which there is a central tunnel that is open at the bottom 5 extends in the vehicle longitudinal direction x. The center tunnel 5 has a center tunnel top 7th ( 2 and 3 ) on which both sides in the vehicle transverse direction y to the outside of the vehicle in each case center tunnel side flanks 9 connect. The footwell 1 is in the vehicle transverse direction y on the outside of the vehicle through laterally outer side sills 11 limited. In the vehicle longitudinal direction x to the rear is the footwell 1 by a vertical heel plate set up on edge 13th limited. As from the 1 and 2 further shows, is the tunnel height of the central tunnel 5 in the vehicle longitudinal direction x is not consistently constant, but in the front area it is a tunnel height h _{1 , which is reduced to a tunnel height h 2} up to the rear area of the vehicle, which simplifies entry and exit in the vehicle rear area.

As can be seen from the figures, the floor panel part goes 3 over the heel plate set up on edge 13th in a rear sheet metal part 15th about that in the vehicle vertical direction z with respect to the floor panel part 3 is offset upwards. The rear sheet metal part 15th is with an approximately horizontal mounting section 17th formed on which the vehicle rear seats can be mounted. The height of the horizontal mounting section 17th of the rear sheet metal part 15th is decisively defined by the tank volume below the rear sheet metal part 15th built-in fuel tank 63 . The outer contour of the fuel tank 63 is roughly simplified as a dot-dash line in the 3 is indicated.

The rear sheet metal part 15th and the heel plate part positioned in front in the vehicle longitudinal direction x 13th together form a cross member running in the vehicle transverse direction y 19th with a hollow profile that is closed in cross section 21 ( 3 ).

The sheet metal part structure of the body floor structure is shown below using the 3 described: This is how the horizontal assembly section works 17th of the rear sheet metal part 15th in the vehicle longitudinal direction x to the front at a leading edge 23 in a cross member contour 25th above. This forms together with a corresponding cross member contour 27 of the heel plate part 13th the hollow profile-shaped cross member 19th . The rear sheet metal cross member contour 25th has one from the leading edge 23 Rear cross member side wall angled vertically downwards 29 on. This goes in the further course to the front of the vehicle at a transition edge 31 into a horizontally aligned cross member floor 33 above. From the cross member floor 33 protrudes an edge flange that is set down at an angle 35 from, the one in flat contact with the heel plate part 13th and is firmly attached to it (for example by spot welding). The lower edge of the margin or the trimmed edge 37 of the rear sheet metal part edge flange 35 is via a height offset Δz ₂ from the top of the center tunnel 7th spaced.

The heel plate cross member contour 27 has an approximately vertically aligned front cross member side wall 39 on that at another transition edge 41 to the rear of the vehicle in a horizontal cross member top wall 43 transforms. The cross member top wall 43 is with an edge flange 46 on the horizontal mounting section 17th of the rear sheet metal part 15th attached.

As from the 3 further shows, has the heel plate part 13th next to the already mentioned cross member contour 27 a connection contour 45 to which the one-piece or multi-piece (e.g. as a welded group) executed floor plate part 3 with its center tunnel 5 is attached. The center tunnel 5 is in the 3 by a height offset Δz ₁ below the cross member 19th on the heel plate 13th appended. For this purpose, the connection contour 45 a U-shaped, downwardly open sheet metal cutout in the heel plate part 13th on, at the edges joining flanges 47 ( 3 ), each with the upper side of the center tunnel 7th and with the center tunnel side flanks 9 are in joint connection.

When viewed from the underside of the vehicle, the upper side of the center tunnel forms 7th and the heel piece 13th an outside corner area 49 ( 3 ), that of two reinforcing elements 51 is encompassed. The two reinforcement elements 51 are spaced from one another in the vehicle transverse direction y. Each of the reinforcement elements 51 encompasses the respective outer edge of the center tunnel top 7th the outside corner area 49 .

In the 4th are the two reinforcement elements 51 each designed as a sheet-metal angle profile part, with a circumferential edge Profile flanges 53 that are at the center tunnel 5 , on the heel plate 13th and / or on the rear sheet metal part 15th are firmly attached. In addition, the angle profile part has a shell-shaped, stiffening box profile 55 on that of the profile flanges 53 has moved. In the installation position of the reinforcement elements 51 forms the box profile 55 together with the center tunnel 5 , the heel plate part 13th and / or the rear sheet metal part 15th a substantially closed stiffening cavity. The box profile has a double function 55 of the 4th reinforcement element shown on the right 51 a horizontal profile floor pointing downwards 57 on which functional elements can be mounted, for example the exhaust system and / or a heat shield. The horizontal profile floor 57 of the box profile 55 is by a height offset Δz ₃ from the cross member bottom 33 of the rear sheet metal part 15th spaced, which results in a space in which the box profile 55 of the reinforcement element 51 Can be positioned in a space-saving manner.

As from the 3 It is further evident that the profile flanges are 53 the reinforcement elements 51 in a fixed connection with both the central tunnel 5 , the heel plate part 13th as well as the rear sheet metal part 15th . The profile flanges run 53 Adapted to the contour, i.e. in a continuous system in an inner corner area 59 between the cross member floor 33 and the edge flange turned downwards 35 of the rear sheet metal part 15th is stretched.

In the 3 a total of three functional elements are mounted, namely the heat shielding plate, which is only indicated very schematically 61 , the exhaust system (not shown) and the fuel tank, which is also only roughly indicated 63 . The fuel tank 63 is via a tank strap 65 on the profile bottom 57 of the reinforcement element 51 assembled. In addition, the 3 a holder 67 on the profile bottom 57 of the reinforcement element 51 mounted on which the exhaust system can be attached.

Accordingly, the reinforcing element represents 51 a central connection point displaced downwards in the vertical direction z of the vehicle, at which the fuel tank 63 - viewed in the vehicle transverse direction y - is mounted approximately in the center of the vehicle. In addition, is the fuel tank 63 at connection points not shown outside the vehicle directly on the cross member floor 33 of the cross member 19th assembled.

In the 5 has the top 7th of the central tunnel 5 an anterior segment 71 on, which is located at the tunnel height h ₁ and in the further course to the rear of the vehicle at an inclined transition segment 73 in a rear segment 75 passes, which is located at the tunnel height h ₂ . The tunnel height h ₂ is reduced compared to the tunnel height h _1. In the rear segment 75 is a bead geometry 77 impressed in order to compensate for local deficits of the tunnel subsidence. The bead geometry 77 has longitudinal and transverse beads 79 on, which extends up into the transition segment 73 extend.

In addition, the 5 the center tunnel 5 not made as a welded group of several sheet metal parts, but rather from a single sheet steel part in a hot forming process.

List of reference symbols

1

Footwell

3

Floor panel part

5

Center tunnel

7th

Center tunnel top

9

Center tunnel side flanks

11

Side skirts

13th

Heel plate part

15th

Rear sheet metal part

17th

Mounting section

19th

Cross member

21

Hollow profile

23

Leading edge

25th

Rear sheet metal cross member contour

27

Heel plate cross member contour

29

rear cross member sidewall

31

Transition edge

33

Cross member floor

35

Edge flange

37

Bleed edge

39

front cross member sidewall

41

Transition edge

43

Cross member top wall

45

Connection contour

46

Edge flange

47

Joining flanges

49

Outside corner area

51

Reinforcement elements

53

Profile flanges

55

Box profile

57

Profile bottom

59

Inside corner area

61

Heat shield

63

Fuel tank

65

Tank strap

67

Exhaust system holder

Δz

Height offsets

71

front segment

73

Transition segment

75

rear segment

77

Bead geometry

79

Longitudinal and transverse beads

Claims (10)

Body floor structure for a two-lane vehicle, with a floor panel part (3) in which a downwardly open center tunnel (5) extending in the vehicle longitudinal direction (x) is formed, the floor panel part (3) having a footwell (1) delimiting, upright heel plate part (13) merges into a horizontally aligned rear sheet metal part (15) on which rear seats can be mounted, the rear sheet metal part (15) together with the heel sheet part (13) having a cross member (19) running in the vehicle transverse direction (y) Hollow profile (21) closed in cross-section, and wherein the heel plate part (13) has a connection contour (45) to which the floor plate part (3) with its central tunnel (5) is attached, the central tunnel (5) being offset by a height (Δz ₁ ) is attached below the cross member (19) on the heel plate part (13), characterized in that a total of exactly two reinforcing elements (51) are provided, which the center tunnel (5) under Ü Bridging the height offset (Δz ₁ ) in a force-transmitting manner with the cross member (19) and that the two reinforcing elements (51) are spaced from one another in the transverse direction of the vehicle (y), and that each of the reinforcing elements (51) on the respective outer edge of the center tunnel top ( 7) encompasses an outer corner area (49) which is formed by the upper side of the center tunnel (7) and the heel plate part (13). Body-floor structure according to Claim 1 , characterized in that the connection contour (45) is a U-shaped, downwardly open sheet metal cutout in the heel plate part (13), at the edges of which joining flanges (47) are placed, which with the center tunnel top (7) and the center tunnel side flanks (9) are connected. Body floor structure according to one of the preceding claims, characterized in that the rear sheet metal part (15) has a horizontal mounting section (17) for the rear seats, which in the vehicle longitudinal direction (x) is forward at a front edge (23) into a transverse support contour (25) which, together with a cross member contour (27) of the heel plate part (13), forms the cross member (19), and that the rear plate part cross member contour (25) has a rear cross member side wall (29) which is angled vertically downward from the front edge (23) , which merges at a transition edge (31) into a horizontally aligned cross member base (33) from which a downwardly turned edge flange (35) protrudes, which is connected to the heel plate part (13), and / or that both the cross member base (33) of the cross member (19) as well as the reinforcing element (51) provides fuel tank connection points. Body-floor structure according to Claim 3 , characterized in that the cross member contour (27) of the heel plate part (13) has a vertically aligned front cross member side wall (39) which merges at a transition edge (41) to the rear of the vehicle into a horizontal cross member top wall (43), which with a Edge flange (46) is connected to the rear sheet metal part (15). Body-floor structure according to Claim 3 or 4th , characterized in that an inner corner area (59) is spanned between the cross member base (33) and the edge flange (35) set down at the bottom, and that the reinforcement element (51) is contour-matched upwards in the vertical direction of the vehicle (z), that is to say is connected in continuous contact with the inner corner area (59) both on the heel plate part (13) and on the cross member base (33) of the rear plate part (15). Body floor structure according to one of the preceding claims, characterized in that the reinforcing element (51) designed as an angular profile part has profile flanges (53) running around the edge, which are attached to the center tunnel (5), to the heel plate part (13) and / or to the rear plate part (15 ) are connected, and that the reinforcing element (51) has a shell-shaped, stiffening box profile (55) which is surrounded by the profile flanges (53) and / or together with the center tunnel (5), the heel plate part (13) and / or the Rear sheet metal part (15) form a substantially closed cavity. Body-floor structure according to Claim 6 , characterized in that the box profile (55) of the reinforcement element (51) has a mounting wall, in particular a horizontal profile floor (57) pointing downwards in the vertical direction of the vehicle (z), on which functional elements can be mounted, such as an exhaust system, a heat shielding plate (61) and / or a fuel tank (63). Body-floor structure according to Claim 7 , characterized in that the horizontal profile bottom (57) of the box profile (55) around a Height offset (Δz ₃ ) from the cross member bottom (33) is spaced, namely with the formation of a space in which the box profile (55) of the reinforcing element (51) is arranged. Body floor structure according to one of the preceding claims, characterized in that the upper side (7) of the center tunnel (5) has a front segment (71) which is located at the tunnel height (h ₁ ) and in the further course to the rear of the vehicle at an inclined Transition segment (73) merges into a rear segment (75) which is located at the tunnel height (h ₂ ), which is smaller than the tunnel height (h ₁ ), and that in particular in the rear segment (75) a bead geometry 77 is embossed, to compensate for local deficits in the tunnel subsidence. Body floor structure according to one of the preceding claims, characterized in that the central tunnel (5) is produced from a single sheet steel part in a hot forming process.

Images