JP2005138655A - Vehicle body floor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To use the same cross member even when the height of a tunnel portion is different, and to prevent lowering in the bond strength between the cross member and the tunnel portion. <P>SOLUTION: In case of an FF vehicle wherein a tunnel portion 12 is low, the cross member 14 and an upper wall portion 12B of the tunnel portion 12 can be coupled by using a retainer FF20. On the other hand, in case of a 4WD vehicle wherein the tunnel portion 12 is high, the cross member 14 and a side wall portion 12A of the tunnel portion 12 can be coupled by using a retainer 4WD. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle body floor structure, and more particularly to a vehicle body floor structure in a vehicle such as an automobile.

Conventionally, in a vehicle body floor structure in a vehicle such as an automobile, a tunnel portion that protrudes upward along the length direction of a pair of left and right rockers (also referred to as side shells) at the center of a floor panel that forms the lower part of a passenger compartment A structure having a pair of cross members extending across the floor panel from the side surface of the tunnel portion to the lower portion of the center pillar of the rocker is known (see, for example, Patent Document 1).
JP 2002-321658 A

  However, in this vehicle body floor structure, the cross-sectional shape of the fixing bracket that connects the end portion of the reinforcing member and the side surface of the tunnel portion as viewed from the vehicle front-rear direction is an L shape, and the vertical wall portion is the side surface of the tunnel portion. It is joined to. As a result, when the same cross member is connected to the vehicle body having a low tunnel portion height, the coupling area between the vertical wall portion of the bracket and the side surface of the tunnel portion is reduced. For this reason, the bonding strength between the cross member and the tunnel portion is lowered.

  In view of the above facts, the present invention has an object to obtain a vehicle body floor structure that can use the same cross member even when the height of the tunnel portion is different and can prevent a decrease in the bonding strength between the cross member and the tunnel portion. It is.

The present invention according to claim 1, the tunnel portion formed along the vehicle longitudinal direction in the vehicle width direction center portion of the floor,
Rockers disposed along the vehicle longitudinal direction at both ends of the floor in the vehicle width direction;
A cross member arranged on the floor upper surface along the vehicle width direction and connecting the tunnel portion and the rocker;
The vehicle body floor structure with
A high tunnel portion connecting member that is used when the tunnel portion is high and connects the cross member and the side wall portion of the tunnel portion;
A connection member for a low tunnel part that is used when the tunnel part is low, and connects the cross member and the upper wall part of the tunnel part,
Have

  Therefore, when the tunnel portion is high, the cross member and the side wall portion of the tunnel portion can be connected using the high tunnel portion connecting member. On the other hand, when the tunnel portion is low, the cross member and the upper wall portion of the tunnel portion can be connected using the low tunnel portion connecting member. As a result, even in a vehicle body having a different height of the tunnel portion, the same cross member can be used, and the coupling strength between the high tunnel portion connecting member or the low tunnel portion connecting member and the tunnel portion can be secured, It is possible to prevent a decrease in the bonding strength between the cross member and the tunnel portion.

  According to a second aspect of the present invention, in the vehicle body floor structure according to the first aspect, an upper flange is formed at an inner end in the vehicle width direction of the upper wall portion of the cross member toward the upper side of the vehicle body. The flange is connected to a vertical wall portion formed in the high tunnel portion connecting member and the low tunnel portion connecting member.

  Therefore, in addition to the contents of claim 1, the upper flange formed on the inner end in the vehicle width direction of the upper wall portion of the cross member toward the upper side of the vehicle body is connected to the connecting member for the high tunnel portion and the connecting portion for the low tunnel portion. Since it is coupled to the vertical wall portion formed on the member, the coupling strength between the high tunnel portion coupling member or the low tunnel portion coupling member and the cross member can be improved.

  A third aspect of the present invention provides the vehicle body floor structure according to any one of the first and second aspects, wherein the high tunnel portion connecting member and the low tunnel portion connecting member are connected to the cross member. The cross-sectional shape seen from the vehicle width direction is the same as the cross-sectional shape seen from the upper vehicle width direction at the inner end portion of the cross member in the vehicle width direction.

  Therefore, in addition to the content described in any one of claims 1 and 2, the cross-sectional shape of the connecting portion with the cross member in the connecting member for the high tunnel portion and the connecting member for the low tunnel portion is seen from the vehicle width direction. Since the cross-sectional shape of the cross member as viewed from the top in the vehicle width direction is the same as the cross-sectional shape of the cross member, the connecting portion of the high tunnel portion connecting member or the low tunnel portion connecting member and the cross member vehicle It can superpose | polymerize with the width direction edge part. As a result, the connecting portion between the connecting member for the high tunnel portion or the connecting member for the low tunnel portion and the inner end portion in the vehicle width direction of the cross member increases. For this reason, it is possible to further improve the bonding strength between the high tunnel portion connecting member or the low tunnel portion connecting member and the cross member.

  The present invention according to claim 1 includes a tunnel portion formed along the vehicle longitudinal direction at the vehicle width direction center portion of the floor, and a rocker disposed along the vehicle longitudinal direction at both ends of the floor in the vehicle width direction. A vehicle body floor structure including a cross member arranged on the floor upper surface along the vehicle width direction and connecting the tunnel portion and the rocker, and is used when the tunnel portion is high. The tunnel portion includes a high tunnel portion connecting member that connects the side wall portion and a low tunnel portion connecting member that is used when the tunnel portion is low and connects the cross member and the upper wall portion of the tunnel portion. Even when the heights of the cross members are different, the same cross member can be used, and a reduction in the bonding strength between the cross member and the tunnel portion can be prevented.

  According to a second aspect of the present invention, in the vehicle body floor structure according to the first aspect, an upper flange is formed at the inner end of the upper wall portion of the cross member in the vehicle width direction toward the upper side of the vehicle body. In addition to the effect of Claim 1, since it is couple | bonded with the vertical wall part formed in the connection member for high tunnel parts, and the connection member for low tunnel parts, the connection member for high tunnel parts or the connection member for low tunnel parts And the cross member can be improved in bonding strength.

  According to a third aspect of the present invention, in the vehicle body floor structure according to any one of the first and second aspects, the vehicle width of the connecting portion with the cross member in the high tunnel portion connecting member and the low tunnel portion connecting member. The cross-sectional shape viewed from the direction is the same as the cross-sectional shape viewed from the upper vehicle width direction at the inner end of the cross member in the vehicle width direction, and therefore, in addition to the effect described in any one of claims 1 and 2 Thus, the present invention has an excellent effect that the bonding strength between the high tunnel portion connecting member or the low tunnel portion connecting member and the cross member can be further improved.

  An embodiment of a vehicle body floor structure according to the present invention will be described with reference to FIGS.

  In the figure, the arrow FR indicates the vehicle body front direction, the arrow UP indicates the vehicle body upward direction, and the arrow IN indicates the vehicle width inside direction.

  As shown in FIG. 3, in this embodiment, a tunnel portion 12 is formed so as to project along the vehicle body longitudinal direction at the vehicle width direction center portion of the floor 10 of the automobile body, as viewed from the vehicle body longitudinal direction of the tunnel portion 12. The cross-sectional shape is a trapezoidal U shape with the opening facing downward.

  In addition, in the vehicle body shown in FIGS. 1-3, it is an FF vehicle with the height H1 of the tunnel part 12 low.

  As shown in FIG. 1, a cross member 14 is disposed along the vehicle width direction on the upper surface 10 </ b> A side of the floor 10, and the cross member 14 is disposed at both ends of the floor 10 in the vehicle width direction. The rocker (not shown) disposed along the tunnel portion 12 is connected to the tunnel portion 12.

  The cross member 14 is disposed on the front side of the vehicle body from the B pillar (not shown), and the front seat is fixed. It is 1.

  As shown in FIG. 2, the cross-sectional shape of the cross member 14 as viewed from the vehicle width direction is a hat shape with the opening portion directed downward, and the upper wall portion 14 </ b> A is a reverse formed by a front portion 14 </ b> B and a rear portion 14 </ b> C. It is V-shaped.

  A flange 14E is formed at the lower end portion of the front wall portion 14D of the cross member 14 toward the front of the vehicle body. The flange 14E is coupled to the upper surface 10A of the floor 10. Further, a flange 14G is formed at the lower end portion of the rear wall portion 14F of the cross member 14 toward the rear of the vehicle body, and the flange 14G is coupled to the upper surface 10A of the floor 10.

  A flange 14H is formed at the vehicle width direction inner side end portion of the front wall portion 14D of the cross member 14 toward the front of the vehicle body, and the flange 14H is coupled to the side wall portion 12A of the tunnel portion 12. Further, a flange 14G is formed at the inner end in the vehicle width direction of the rear wall portion 14F of the cross member 14 toward the rear of the vehicle body, and the flange 14G is coupled to the side wall portion 12A of the tunnel portion 12.

  An upper flange 14K is formed at the vehicle width direction inner side end portion of the upper wall portion 14A of the cross member 14 toward the upper side of the vehicle body. In addition, a retainer FF 20 as a low tunnel portion connecting member is disposed at a connecting portion between the cross member 14 and the tunnel portion 12.

  An outer portion in the vehicle width direction of the retainer FF20 serves as a cross member coupling portion 22, and an inner portion in the vehicle width direction of the retainer FF20 serves as a tunnel portion coupling portion 24. Further, a vertical wall portion 26 is formed at an intermediate portion between the cross member coupling portion 22 and the tunnel portion coupling portion 24 in the retainer FF 20.

  The cross-sectional shape of the cross member coupling portion 22 viewed from the vehicle width direction is a U-shape with the opening facing downward, and the upper wall portion 22A is an inverted V-shape consisting of a front portion 22B and a rear portion 22C. It has become. Accordingly, the cross-sectional shape of the cross member coupling portion 22 viewed from the vehicle width direction is the same as the cross-sectional shape of the cross member 14 viewed from the upper vehicle width direction at the vehicle width direction inner end portion.

  A flange 22D is formed at the front end portion of the front portion 22B of the upper wall portion 22A in the cross member coupling portion 22 of the retainer FF20, and the rear portion of the upper wall portion 22A in the cross member coupling portion 22 of the retainer FF20. A flange 22E is formed at the rear end of 22C toward the lower side of the vehicle body.

  The front portion 22B of the upper wall portion 22A, the rear portion 22C of the upper wall portion 22A, the flange 22D, and the flange 22E in the cross member coupling portion 22 of the retainer FF20 are respectively located on the inner side of the open cross section of the cross member 14, and the upper wall portion of the cross member 14 Polymerized on the front part 14B of 14A, the rear part 14C of the upper wall part 14A, the upper part of the front wall part 14D and the upper part of the rear wall part 14F, and is welded by spot welding or the like.

  Further, the upper flange 14K of the cross member 14 is superposed on the outer surface 26A in the vehicle width direction of the vertical wall portion 26 of the retainer FF20, and is welded by spot welding or the like.

  The cross-sectional shape seen from the vehicle width direction of the tunnel portion coupling portion 24 of the retainer FF20 is a hat shape with the opening portion directed downward, and a flange 24B is provided at the lower end portion of the front wall portion 24A toward the front of the vehicle body. Is formed. A flange 24D is formed at the lower end of the rear wall 24C toward the rear of the vehicle body.

  The flanges 24B and 24D in the tunnel portion coupling portion 24 of the retainer FF20 are superposed on the upper wall portion 12B of the tunnel portion 12, and are welded by spot welding or the like.

  On the other hand, the vehicle body shown in FIGS. 4 to 6 is a 4WD vehicle in which the height H2 of the tunnel portion 12 is high.

  In this 4WD vehicle, the same cross member 14 as the FF vehicle having a low height H1 of the tunnel portion 12 shown in FIGS. 1 to 3 is used, and the high tunnel portion is connected to the connecting portion between the cross member 14 and the tunnel portion 12. A retainer 4WD30 is provided as a connecting member.

  As shown in FIG. 5, the vehicle width direction outer side portion of the retainer 4WD 30 is a cross member coupling portion 32, and the vehicle width direction inner side portion of the retainer 4 WD 30 is a tunnel portion coupling portion 34. Further, a vertical wall portion 36 is formed at the intermediate portion in the front-rear direction of the tunnel portion coupling portion 34 in the retainer 4WD 30.

  The cross-sectional shape of the cross member coupling portion 32 viewed from the vehicle width direction is a U-shape with the opening facing downward, and the upper wall portion 32A is an inverted V-shape consisting of a front portion 32B and a rear portion 32C. It has become. Further, a flange 32D is formed at the front end portion of the front portion 32B of the upper wall portion 32A of the cross member coupling portion 32 of the retainer 4WD30, and the upper wall portion 32A of the cross member coupling portion 32 of the retainer 4WD30 is formed. A flange 32E is formed at the rear end portion of the rear portion 32C toward the lower side of the vehicle body. Therefore, the cross-sectional shape of the cross member coupling portion 32 viewed from the vehicle width direction is the same as the cross-sectional shape of the cross member 14 viewed from the upper vehicle width direction at the vehicle width direction inner end portion.

  As shown in FIG. 4, the front portion 32B of the upper wall portion 32A, the rear portion 32C of the upper wall portion 32A, the flange 32D, and the flange 32E in the cross member coupling portion 32 of the retainer 4WD30 are respectively inside the open cross section of the cross member 14. The cross member 14 is superposed on the front part 14B of the upper wall part 14A, the rear part 14C of the upper wall part 14A, the upper part of the front wall part 14D and the upper part of the rear wall part 14F, and is welded by spot welding or the like.

  As shown in FIG. 6, the upper flange 14K of the cross member 14 is superposed on the outer surface 36A in the vehicle width direction of the vertical wall portion 36 of the retainer 4WD30, and is welded by spot welding or the like.

  As shown in FIG. 5, the cross-sectional shape of the tunnel coupling portion 34 of the retainer 4WD 30 viewed from the top and bottom of the vehicle body is a hat shape with the opening directed inward in the vehicle width, and the vehicle width of the front wall portion 34A. A flange 34B is formed at the inner end in the direction toward the front of the vehicle body. Further, a flange 34D is formed at the inner end in the vehicle width direction of the rear wall portion 34C toward the rear of the vehicle body.

  As shown in FIG. 4, the flanges 34 </ b> B and 34 </ b> D in the tunnel portion coupling portion 34 of the retainer 4WD 30 are superposed on the side wall portion 12 </ b> A of the tunnel portion 12 and are welded by spot welding or the like.

  Next, the operation of this embodiment will be described.

  In the present embodiment, in the case of an FF vehicle having a low tunnel portion 12, as shown in FIGS. 1 to 3, the retainer FF 20 can be used to connect the cross member 14 and the upper wall portion 12 </ b> B of the tunnel portion 12. . On the other hand, when the tunnel portion 12 is a high 4WD vehicle, as shown in FIGS. 4 to 6, the retainer 4WD 30 can be used to connect the cross member 14 and the side wall portion 12 </ b> A of the tunnel portion 12.

  As a result, the same cross member 14 can be used even in the vehicle body having different heights of the tunnel portion 12, and the coupling strength between the retainer FF20 or the retainer 4WD30 and the tunnel portion 12 can be ensured. It is possible to prevent a decrease in the bonding strength with the portion 12.

  Further, in the present embodiment, the upper flange 14K formed at the vehicle width direction end of the upper wall portion 14A of the cross member 14 toward the upper side of the vehicle body is the vertical wall portions 26, 36 formed in the retainer FF20 and the retainer 4WD30. Is bound to. For this reason, the coupling strength between the retainer FF 20 or the retainer 4WD 30 and the cross member 14 can be improved, and the coupling strength between the cross member 14 and the tunnel portion 12 can be improved.

  In the present embodiment, the cross-sectional shape of the retainer FF 20 and the retainer 4WD 30 viewed from the vehicle width direction of the cross member coupling portions 22 and 32 is a cross section of the cross member 14 viewed from the upper vehicle width direction at the vehicle width direction inner end. Since the shape is the same, the cross member coupling portions 22 and 32 of the retainer FF 20 or the retainer 4WD 30 and the end portion in the vehicle width direction of the cross member 14 can be overlapped.

  As a result, the number of connecting portions between the cross member connecting portions 22 and 32 and the end portions in the vehicle width direction of the cross member 14 in the retainer FF20 or the retainer 4WD30 increases. For this reason, the coupling strength between the retainer FF20 or the retainer 4WD30 and the cross member 14 can be further improved, and the coupling strength between the cross member 14 and the tunnel portion 12 can be further improved.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, the cross-sectional shape of the tunnel portion 12 and the cross-sectional shape of the cross member 14 are not limited to the cross-sectional shape of the above embodiment.

It is the perspective view seen from the vehicle body slanting back outer side which shows the case where the tunnel of the vehicle body floor structure concerning one Embodiment of this invention is low. It is the disassembled perspective view seen from the vehicle body slanting back outer side which shows the case where the tunnel of the vehicle body floor structure which concerns on one Embodiment of this invention is low. FIG. 3 is an enlarged cross-sectional view taken along line 3-3 in FIG. 1. It is the perspective view seen from the vehicle body slanting back outer side which shows the case where the tunnel of the vehicle body floor structure concerning one Embodiment of this invention is high. It is the disassembled perspective view seen from the vehicle body diagonally back outer side which shows the case where the tunnel of the vehicle body floor structure which concerns on one Embodiment of this invention is high. FIG. 6 is an enlarged cross-sectional view taken along line 6-6 in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Floor 12 Tunnel part 12A Side wall part of tunnel part 12B Upper wall part of tunnel part 14 Cross member 14K Upper flange of cross member 20 Retainer FF (connection member for low tunnel parts)
22 Retainer FF cross member connecting portion 24 Retainer FF tunnel portion connecting portion 26 Retainer FF vertical wall portion 30 Retainer 4WD (connecting member for high tunnel portion)
32 Retainer 4WD cross member joint 34 Retainer 4WD tunnel joint 36 Retainer 4WD vertical wall

Claims (3)

A tunnel formed along the longitudinal direction of the vehicle body at the center in the vehicle width direction of the floor;
Rockers disposed along the vehicle longitudinal direction at both ends of the floor in the vehicle width direction;
A cross member arranged on the floor upper surface along the vehicle width direction and connecting the tunnel portion and the rocker;
The vehicle body floor structure with
A connection member for a high tunnel part that is used when the tunnel part is high, and that connects the cross member and a side wall part of the tunnel part,
A connection member for a low tunnel part that is used when the tunnel part is low, and connects the cross member and the upper wall part of the tunnel part,
A vehicle body floor structure characterized by comprising:   2. The vehicle body floor structure according to claim 1, wherein an upper flange is formed at an inner end portion of the upper wall portion of the cross member in the vehicle width direction toward the upper side of the vehicle body, and the upper flange is the connection member for the high tunnel portion. The vehicle body floor structure according to claim 1, wherein the vehicle body floor structure is coupled to a vertical wall portion formed in the low tunnel portion connecting member.   The cross-sectional shape seen from the vehicle width direction of the connecting portion with the cross member in the high tunnel portion connecting member and the low tunnel portion connecting member is an upper vehicle width direction at the inner end portion in the vehicle width direction of the cross member. The vehicle body floor structure according to any one of claims 1 and 2, wherein the vehicle body floor structure has the same cross-sectional shape as viewed from above.

Images