JP5046985B2 - Body floor structure - Google Patents

Description

  The present invention relates to a vehicle body floor structure.

In some vehicle body floor structures, a steel round pipe cross member is attached to the lower surface of a floor panel to increase the rigidity of the floor and suppress the vibration of the floor. Moreover, the cross member is made of resin to prevent rust of the cross member (for example, see Patent Document 1).
JP 2000-264256 A (page 4, FIG. 2)

However, in the vehicle floor structure of Patent Document 1, there is a problem that the steel cross member is easily rusted by scattered rainwater and soil.
By adopting resin for the cross member, rust can be prevented. However, since the resin cross member is inferior in strength to the metal, the resin cross member is generally made of a metal cross member. There is a problem that the strength of the floor is lower than the one adopted.

  In addition, as a measure for increasing the strength of the floor, for example, a reinforcing member that also serves as an undercover is conceivable. The under cover rectifies air flowing through the bottom of the vehicle and is attached to the floor. However, this under cover requires a large number of parts and takes time to assemble on the floor.

  An object of the present invention is to provide a vehicle body floor structure in which rusting of a metal cross member is suppressed and an under cover can be easily assembled to a vehicle body.

According to the first aspect of the present invention, there is provided a tunnel portion that is located in the center of the vehicle body in the vehicle width direction and extends in the front-rear direction of the vehicle body, a left floor panel portion that is connected to the tunnel portion, a right floor panel portion,・ A left floor frame and a right floor frame provided on each outer surface facing downward of the right floor panel, and provided on the outside of the left and right floor frames, and connected to each corner of the left and right floor panels. In a vehicle body floor structure comprising a left side sill and a right side sill that form the outermost side of the floor, and a left tunnel frame and a right tunnel frame that are joined to the outer surface of the left and right floor panels and to the left and right of the tunnel respectively . each left cover portion an outer surface of the left and right floor panel part, not covered by the right cover part, the edge portion is formed in each peripheral, central and left of the right cover portion below the tunnel portion An under cover that joins the center of the bar portion with the reinforcing member cover section of the groove shape, the left and right floor frames and the left tunnel frame, by connecting the right tunnel frame, the groove of the reinforcement member covers part of the under cover A cross member that passes through the inside and is covered with the lower cover and is suspended by a cover support mechanism .
In the invention according to claim 2, the under cover has a rib portion that is formed on the inner surface in the vicinity of and perpendicular to the cross member, and a boss portion that is formed on the inner surface to be attached to the left and right floor panel portions, It is characterized by having.

In the invention according to claim 1, the vehicle body floor structure, the left cover portion an outer surface of the left and right floor panel portions, respectively, have covered the right cover portion, to form an edge in each of the peripheral edge, right below the tunnel portion and under cover a central center and the left cover section of the cover portion is joined with the reinforcing member cover section of the groove shape, the left and right floor frames and the left tunnel frame, by connecting the right tunnel frame, the undercover Rain member that is scattered between the bottom of the vehicle and the ground, since the lower member is covered through the groove of the reinforcing member cover part and the lower member is covered and the under cover is suspended by the cover support mechanism. since block the debris such as and soil in undercover, for example, when the cross member is made of metal, to prevent scratches of the cross member by the reinforcing member cover section, resulting in scratches on origin There is an advantage that it is possible to suppress the rust of the cross member made of the genus.

Further, the under cover and the cross member can be attached to the vehicle body in a state where the under cover and the cross member are previously coupled by the cover support mechanism, and the assembly of the under cover to the vehicle body is facilitated even with two parts.
Further, the edge portion and the groove shape can more reliably block scattered matters such as rainwater and soil, and rust of the cross member can be suppressed.
In the invention according to claim 2, the under cover has a rib portion that is formed on the inner surface in the vicinity of and perpendicular to the cross member, and a boss portion that is formed on the inner surface to be attached to the left and right floor panel portions, Therefore, the under cover can be attached to the vehicle body in a state where the under cover and the cross member are joined in advance, and the assembly of the under cover to the vehicle body is facilitated even with two parts.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of a vehicle body floor structure (first embodiment) according to the present invention.
The vehicle body floor structure (first embodiment) 11 forms the floor of the vehicle body 13 of the vehicle 12, a tunnel portion 16 is formed between the driver seat 14 and the passenger seat 15, and an under cover 21 is provided at the bottom. Specifically, it will be described later.

  The vehicle body 13 includes a front body 23, a vehicle body floor structure (underbody) 11 connected to the front body 23, and left and right side bodies 24 standing on the vehicle body floor structure 11.

FIG. 2 is a sectional view taken along line 2-2 of FIG. 1 (first embodiment). This will be described with reference to FIG.
The vehicle body floor structure (underbody) 11 is joined to the tunnel part 16, the floor panel 25 connected to the tunnel part 16, the left side sill 27, the right side sill 28, the left side sill 27, and the right side sill 28 connected to the floor panel 25. A floor cross member 31, a left front floor frame 32 that is a left floor frame attached to an outer surface of the floor panel 25, a right front floor frame 33 that is a right floor frame, and a floor panel 25 A left tunnel frame 35 and a right tunnel frame 36 which are respectively joined to the outer surface and the left and right sides of the tunnel portion 16 are provided.

The tunnel portion 16 forms the center of the floor of the vehicle body 13 and is positioned at the center in the vehicle width direction (X-axis direction), extends in the front-rear direction of the vehicle body 13 (Y-axis direction), and passes through, for example, a propeller shaft of an FR vehicle. .
The floor panel 25 has a left floor panel portion 41 and a right floor panel portion 42.

A left floor frame (left front floor frame) 32 is connected to the left side frame 43 of the front body 23.
A right floor frame (right front floor frame) 33 is connected to the right side frame 44 of the front body 23.

  Further, the vehicle body floor structure 11 connects the under cover 21 that covers the outer surface 46 of the left floor panel portion 41 and the outer surface 47 of the right floor panel portion 42, the left floor frame 32, and the right floor frame 33. And a cross member 51 in which the lower portion 48 is covered. In addition, the under cover 21 is attached to the left floor frame 32 and the right floor frame 33 by the cross member 51.

FIG. 3 is a perspective view (first embodiment) of the under cover used in the vehicle body floor structure of the present invention. This will be described with reference to FIG.
The under cover 21 is formed with a left cover portion 53 that is disposed along the outer surface 46 of the left floor panel portion 41, and a right cover portion 54 that is disposed along the outer surface 47 of the right floor panel portion 42, and is formed with the right cover portion. A reinforcing member cover portion 55 is formed at the center of 54, which joins the center of the left cover portion 53.
The under cover 21 is attached to the cross member 51 blocked by the reinforcing member cover portion 55 by a cover support mechanism 56.
The material of the under cover 21 is resin, and the characteristics of the resin are arbitrary.

The left cover portion 53 is flat and shallow, and is formed in a substantially rectangular shape. A cover body 57 having a size substantially the same as the size of the left floor panel portion 41 is formed, and an edge portion 58 is formed in the cover body 57. A rib portion 61 is formed on the inner surface, and a boss portion 63 is formed on the inner surface to be attached to the left floor panel portion 41 with an attachment member 62.
The right cover portion 54 is substantially the same as the left cover portion 53 with the tunnel portion 16 as a reference, and a description thereof is omitted.

Note that both the left cover portion 53 and the right cover portion 54 are substantially rectangular, but may be other than a substantially rectangular shape depending on conditions, for example, an oval shape.
The left cover portion 53 and the right cover portion 54 are substantially symmetric with respect to the tunnel portion 16, but may be formed asymmetrically.

  The reinforcing member cover portion 55 has a groove shape, is integrally molded with the left cover portion 53 and the right cover portion 54, and covers the cross member 51 except for the top. Next, a specific description will be given.

4 is a cross-sectional view taken along line 4-4 of FIG. 2 (first embodiment). This will be described with reference to FIG.
The reinforcing member cover portion 55 includes the lower portion 48 of the cross member 51 and the front surface 65 of the cross member 51 facing the front (arrow a1 direction), rear (arrow a2 direction), and downward (arrow a3 direction) of the vehicle 12. The rear surface 66 and the lower surface 67 are covered. Further, a first cover portion 71 that is in contact with the lower surface 67 of the cross member 51 is formed, and the second cover portion 72 and the third cover portion 73 are placed on the first cover portion 71 higher than the height H of the cross member 51. Has been established.
The “lower part 48 of the cross member 51” is below 50% of the height H of the cross member 51.

In addition, although both the 2nd cover part 72 and the 3rd cover part 73 formed the height h uniformly between the full length L (refer FIG. 3) extended in a vehicle width direction (X-axis direction), the center is a tunnel. It is possible to make it higher along the portion 16.
Although both the second cover part 72 and the third cover part 73 are formed with a height h, either one of the heights can be lower or higher than the height h.
It is also possible to dispose a fourth cover portion (not shown) that forms a lid above the cross member 51 and attach it to the second cover portion 72 and the third cover portion 73.
In this way, scattered objects such as rainwater and soil scattered by the second cover part 72, the third cover part 73, and the fourth cover part with the changed height h can be more reliably blocked.

  The cross member 51 is a rectangular tube, has the front surface 65, the rear surface 66, and the lower surface 67 described above, and has a first fastening member (for example, a nut) 75 provided therein, and corresponds to each frame. That is, they are provided in a cross member 51 located below the left front floor frame 32, the right front floor frame 33, the left tunnel frame 35, and the right tunnel frame 36. The left front floor frame 32, the right front floor frame 33, the left tunnel frame 35, the right tunnel frame 36 and the second fastening member (eg, bolt) corresponding to the first fastening member (eg, nut) 75 are provided. 76 is integrally attached.

The first fastening member (for example, nut) 75 may be attached from, for example, a hole formed in the lower surface 67, and the hole may be closed later.
The material of the cross member 51 is made of metal, but may be made of resin.
As described above, the cross member 51 supports the under cover 21 by the cover support mechanism 56.

5 is a cross-sectional view taken along line 5-5 of FIG. 2 (first embodiment), and is a cross-section of the cover support mechanism 56. FIG.
The cover support mechanism 56 is formed by integrally or integrally forming the fitting latching portion 77 with the undercover 21, and passes the cross member 51 through the fitting latching portion 77. Specifically, a hole slightly larger than the cross member 51 is formed by standing in an U shape on the inner surface of the under cover 21.

Next, a procedure for attaching the under cover 21 will be briefly described with reference to FIG.
First, the under cover 21 is molded in advance with a resin, and a metal cross member 51 is attached to the under cover 21. At that time, the cross member 51 is passed through the cover support mechanism 56 (fitting latching portion 77).
Next, in the downstream process, the under cover 21 through which the cross member 51 is passed is raised from below to the vehicle body 13 as indicated by an arrow a4, and the cross member 51 is attached to each frame by a second fastening member (for example, a bolt). Install with 76. Further, the cover main body 57 is attached to the left floor panel portion 41 and the right floor panel portion 42 by the attachment member 62.
A positioning portion (not shown) is provided as appropriate based on the vehicle body 13.

Next, the operation of the vehicle body floor structure of the present invention (first embodiment) will be described.
In the vehicle body floor structure (first embodiment) 11 shown in FIGS. 1 to 3, the traveling wind flowing through the bottom of the vehicle 12 as indicated by an arrow a <b> 5 can be rectified by the under cover 21.

Further, when rainwater scatters between the bottom of the vehicle 12 and the ground, it hits the undercover 21, so that the portion covered with the undercover 21 is difficult to contact the rainwater.
In this way, scattered matter such as rainwater and soil that is scattered is blocked by the reinforcing member cover 55, so that when the cross member 51 is made of metal, the cross member 51 is prevented from being scratched, and the metal generated from the scratch is the starting point. Rust of the made cross member 51 can be suppressed.

In the vehicle body floor structure (first embodiment) 11 shown in FIG. 3, the under cover 21 is attached to the vehicle body 13 in a state where the under cover 21 and the cross member 51 are connected in advance. The undercover 21 can be easily assembled to the 13 floors (the left front floor frame 32, the right front floor frame 33, the left tunnel frame 35, and the right tunnel frame 36).
That is, it is possible to reduce the production cost for attaching the undercover.

  The reinforcing member cover portion 55 shown in FIG. 4 has a second cover portion 72 and a third cover portion 73 that are higher than the height H of the cross member 51. Since it stands upright, it can block more reliably the scattered matter, such as rain water and soil, which scatters with respect to the cross member 51.

Next, “another embodiment” of the vehicle body floor structure will be described.
FIG. 6 is a sectional view of the second embodiment and corresponds to FIG. The same components as those in the embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals and description thereof is omitted.

The vehicle body floor structure 11B according to the second embodiment includes a cover support mechanism 56B.
The cover support mechanism 56 </ b> B is formed by integrally or integrally forming the latching claw 91 on the undercover 21, and hooks the latching claw 91 on the cross member 51. Specifically, a substantially L-shaped claw body 92 is erected on the inner surface of the under cover 21 so as to sandwich the cross member 51 along the front surface 65 and the rear surface 66 of the cross member 51.

The vehicle body floor structure 11B of the second embodiment exhibits the same operations and effects as the vehicle body floor structure 11 of the first embodiment.
Further, when the cover support mechanism 56B is attached to the cross member 51, the claw body 92 is elastically deformed as indicated by the arrow b1, so that the connection between the cross member 51 and the under cover 21 is easy.

FIG. 7 is a sectional view of the third embodiment and corresponds to FIG. The same components as those in the embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals and description thereof is omitted.
The vehicle body floor structure 11C of the third embodiment includes a cover support mechanism 56C.

The cover support mechanism 56C includes a first coupling hole 95 that penetrates the cross member 51, a second coupling hole 96 that penetrates the undercover 21 concentrically with the first coupling hole 95, the first coupling hole 95, and the first coupling hole 95. 2 and a pressing member 97 that is inserted into the coupling hole 96 and presses and fixes the under cover 21 to the cross member 51.
The pressing member 97 applies a pressing force, and is, for example, a rivet, a clip, or a bolt.

The vehicle body floor structure 11C of the third embodiment exhibits the same operations and effects as the vehicle body floor structure 11 of the first embodiment.
Further, in the cover support mechanism 56C, the undercover 21 only needs to be provided with the penetrating second coupling hole 96, and the resin molding becomes easy.
Furthermore, the existing member can be used as the pressing member 97, and the structure becomes simple.

  8A and 8B are cross-sectional views of the fourth embodiment, FIG. 8A is a view corresponding to FIG. 5, and FIG. 8B is a cross-sectional view taken along the line bb of FIG. The same components as those in the embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals and description thereof is omitted.

  A vehicle body floor structure 11D according to the fourth embodiment includes a cross member 51D and a cover support mechanism 56D.

The cover support mechanism 56D includes a cast-in portion 101 formed on the cross member 51D and a disk-shaped cast-in solidification portion 102 that casts the cast-in portion 101.
The cast-in part 101 opens the resin inlet 103 in the cross member 51D, attaches the frame member 104 so as to form a cavity continuous with the resin inlet 103, and closes the opening 105 through which the frame member 104 passes with the closing member 106. It is a thing.
In the cavity, the disk-shaped cast-solidified portion 102 is formed by the plasticized resin filled from the resin inlet 103 by injection of the injection molding machine.

The vehicle body floor structure 11D of the fourth embodiment exhibits the same operations and effects as the vehicle body floor structure 11 of the first embodiment.
Further, since the cover support mechanism 56D solidifies the melted (plasticized) resin in a disk shape, it is possible to prevent sinking of the cast-in solidified portion 102 and fix the cross member 51D in close contact with the under cover 21. be able to.

FIG. 9 is a cross-sectional view of the fifth embodiment, corresponding to FIG. The same components as those in the embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals and description thereof is omitted.
The vehicle body floor structure 11E according to the fifth embodiment is characterized by including a cover support mechanism 56E.
The cover support mechanism 56 </ b> E is obtained by joining the cross member 51 to the under cover 21 with an adhesive 111.

The vehicle body floor structure 11E of the fifth embodiment exhibits the same operations and effects as the vehicle body floor structure 11 of the first embodiment.
Further, the cover support mechanism 56E does not need to form irregularities or holes for attaching the cross member 51 to the under cover 21, and the under cover 21 including the resin molding die can be easily molded.

FIG. 10 is a sectional view of the sixth embodiment and corresponds to FIG. The same components as those in the embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals and description thereof is omitted.
The vehicle body floor structure 11F according to the sixth embodiment is characterized by including a cover support mechanism 56F.
The cover support mechanism 56 </ b> F is obtained by fixing the cross member 51 to the under cover 21 with a band member 115. A through hole 116 through which the band member 115 is passed is formed in the under cover 21.

The vehicle body floor structure 11F according to the sixth embodiment exhibits the same operations and effects as the vehicle body floor structure 11 according to the first embodiment.
Further, the cover support mechanism 56F only needs to open the through hole 116 penetrating the under cover 21, and the resin molding becomes easy.
Furthermore, an existing member can be used as the band member 115, and the structure becomes simple.

  In the embodiment, the vehicle body floor structure of the present invention is used for a floor of a vehicle body having a tunnel portion and an under cover. However, the vehicle body floor structure can also be used for a floor without an under cover. That is, by attaching the reinforcing member cover portion 55 to the cross member 51, rusting of the metal cross member can be suppressed.

  The vehicle body floor structure of the present invention is suitable for a vehicle body floor having a tunnel portion and an under cover.

It is a perspective view of the vehicle body floor structure (1st Embodiment) of this invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. 1 (first embodiment). It is a perspective view (1st Embodiment) of the undercover used for the vehicle body floor structure of this invention. FIG. 4 is a sectional view taken along line 4-4 of FIG. 2 (first embodiment). FIG. 5 is a sectional view taken along line 5-5 in FIG. 2 (first embodiment). It is sectional drawing of 2nd Embodiment. It is sectional drawing of 3rd Embodiment. It is sectional drawing of 4th Embodiment. It is sectional drawing of 5th Embodiment. It is sectional drawing of 6th Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Vehicle body floor structure, 13 ... Vehicle body, 16 ... Tunnel part, 21 ... Under cover, 27 ... Left side sill, 28 ... Right side sill, 32 ... Left floor frame, 33 ... Right floor frame, 41 ... Left floor panel part, 42 ... right floor panel part, 46 ... outer surface of left floor panel part, 47 ... outer surface of right floor panel part, 48 ... lower part, 51 ... cross member.

Claims (2)

The center of the floor of the vehicle body is located in the center of the vehicle width direction and extends in the front-rear direction of the vehicle body, and the left floor panel portion, the right floor panel portion connected to the tunnel portion, and the left and right floor panel portions Left floor frame, right floor frame provided on the outer surface facing downward, and the outermost floor of the floor connected to the respective corners of the left and right floor panel portions provided on the outside of the left and right floor frames A vehicle body floor structure comprising: a left side sill, a right side sill, and a left tunnel frame and a right tunnel frame joined to the outer surface of the left and right floor panel portions and to the left and right of the tunnel portion, respectively .
Each left cover portion an outer surface of the left and right floor panel part, not covered by the right cover part, the edge portion is formed in each of the peripheral, central and the left cover portion of the right cover portion below said tunnel portion The under cover joined at the center with a groove-shaped reinforcing member cover , the left and right floor frames, the left tunnel frame, and the right tunnel frame are connected, and the reinforcing member cover portion of the under cover And a cross member that covers a lower portion of the under cover and is suspended by a cover support mechanism . The under cover includes a rib portion that is formed on the inner surface of the cross member so as to be close to and orthogonal to the cross member, and a boss portion that is formed on the inner surface to be attached to the left and right floor panel portions. The vehicle body floor structure according to claim 1.

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