JP6087170B2 - Auto body structure - Google Patents

Description

  The present invention relates to a vehicle body structure for a vehicle in which a fuel tank is disposed below a rear portion of a floor panel from a footrest portion of an occupant.

  As a vehicle body structure of an automobile in which a fuel tank is disposed below a rear portion of a floor panel from an occupant's footrest portion, for example, there is one disclosed in Patent Document 1 in the past. In this conventional structure, the lower surface of the rear end portion of the side member is positioned below the lower surface of the fuel tank disposed behind the side member. In addition, a tunnel portion for avoiding interference with an exhaust pipe or the like is formed in a portion of the floor panel in front of the seat riser on which the rear seat is mounted so as to avoid interference with an exhaust pipe or the like.

JP 2012-30726 A

In the above-mentioned conventional publication, it is said that chipping caused by stones and the like jumped up by the front wheels can be suppressed. However, in the case of a vehicle in which the left and right side members are wide in the vehicle width direction, the side member and the fuel tank There is a concern that the amount of lap in the vehicle width direction is reduced and the chipping suppression effect is reduced.

In addition, the portion of the floor panel that serves as a footrest portion for the rear seat occupant between the tunnel portion and the rocker member is liable to be affected by vertical bending and vibration due to twisting of the tunnel portion during running. is there.

The present invention has been made in view of the above-described conventional situation, and even when the left and right side members are arranged at a wide interval, an effect of suppressing chipping to the fuel tank is obtained, and twisting of the tunnel portion is suppressed. An object of the present invention is to provide a vehicle body structure of an automobile that can suppress vibration of a foot pool of a floor panel.

According to the present invention, a tunnel portion extending in the vehicle front-rear direction is formed in the center portion of the floor panel in the vehicle width direction and has a downward opening cross-sectional hat opening downward, and rocker members extending in the vehicle front-rear direction are formed on both sides in the vehicle width direction In the vehicle body structure of the automobile in which the fuel tank is disposed below the rear portion of the floor panel occupant's foot pool,
A bead portion that protrudes upward from the tunnel portion to the rocker member is formed in the foot pool portion of the floor panel, and a reinforcing member having an upper opening cross-sectional hat shape that opens upward is provided on both openings of the tunnel portion. The vehicle is disposed so as to extend across the edge, and the vehicle width direction ends of the reinforcing member are aligned with the vehicle longitudinal direction position so that the vehicle width direction both ends of the reinforcing member are continuous with the tunnel side end of the bead portion. The lower surface of both ends is located below the lower surface of the fuel tank.

According to the present invention, the reinforcing member is disposed so as to extend over both edges of the opening of the tunnel portion, and the lower surfaces of both ends in the vehicle width direction of the reinforcing member are positioned below the lower surface of the fuel tank. The both ends of the member can suppress chipping hitting the bottom surface of the fuel tank, and since it does not depend on the side member, the chipping suppressing effect is not reduced even when the interval between the side members is wide. .

  In addition, a large closed cross-section is formed by the reinforcing member and the bead portion on the floor side at both edges of the opening of the tunnel portion, so that the surface rigidity of the floor panel, the torsional rigidity of the tunnel portion, and the vertical bending rigidity can be improved. It can improve the maneuverability.

In addition, the floor panel that forms the occupant's foot is formed with a bead that is continuous with the reinforcement member of the tunnel. It is possible to improve without experiencing vibrations. Moreover, a deformation | transformation of the floor panel at the time of a side collision can be suppressed by a bead part. Thus, since the reinforcement part only for a floor panel is not required, the increase in a weight and cost can be suppressed.

It is the model top view which looked at the vehicle body structure of the motor vehicle by Example 1 of this invention from the vehicle interior side. FIG. 2 is a sectional rear view of the vehicle body structure (sectional view taken along line II-II in FIG. 1). FIG. 3 is a sectional side view of the vehicle body structure (a sectional view taken along line III-III in FIG. 1). It is the front perspective view seen from the slanting front of the above-mentioned body structure.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 4 are views for explaining a vehicle body structure of an automobile according to Embodiment 1 of the present invention. In this embodiment, front, rear, left, and right are obtained by looking at the front of the vehicle from the vehicle interior. It means front, back, left and right in the state.

In the figure, reference numeral 1 denotes a vehicle body. The vehicle body 1 is disposed on the left and right sides of the tunnel portion 2 disposed so as to extend in the vehicle front-rear direction at the center in the vehicle width direction. The left and right side members 3, 3 extending in the vehicle front-rear direction, and the left and right rocker members 4, 4 disposed in the vehicle width direction left and right sides of the side members 3 and extending in the vehicle front-rear direction, A floor panel 5 stretched between the tunnel portion 2 and the left and right rocker members 4, and a seat riser formed so as to be positioned one step above the rear end portion of the floor panel 5. 8 is included. 6a is a front wheel and 6b is a rear wheel.

The seat riser 8 is formed by bending an inclined portion 8b obliquely downward at the front portion of the rear floor panel 8a and arranging an inclined reinforcing panel 8c behind the inclined portion 8b. A cross member 8d extending in the vehicle width direction is formed with the inclined portion 8b.

The tunnel portion 2 has a downward opening cross-sectional hat shape that opens downward, and includes left and right flange portions (opening both edges) 2a and 2a, left and right vertical wall portions 2b and 2b, and an upper wall portion. 2c.

The side member 3 has left and right flange portions 3a and 3a, and has a top-opening cross-sectional hat shape that opens upward. Further, the rocker member 4 has a generally rectangular tube shape formed by connecting a Ronca inner 4a and a rocker outer 4b with a flange. The inner end portion 5a of the floor panel 5 is coupled to the flange 2a of the tunnel portion 2, the outer end portion 5b is coupled to the rocker inner 4a, and the middle portion in the vehicle width direction is the left and right flange portions of the side member 3. 3a and 3a.

  The front end portion 4c of the left and right rocker members 4 is coupled to the left and right side members 3 by a coupling member 7, and the rear end portions 4d are coupled to each other by the cross member 8d extending in the vehicle width direction. Yes. Further, the front end portions 3 b of the side members 3 are joined together by a cross member 9.

  Further, left and right rear seats (not shown) are mounted on the upper surface of the seat riser 8, and a front portion of the cross member 8d of the floor panel 5 is a footrest portion 5c on which a rider seated on the rear seat places a foot. 5c. A fuel tank 10 is suspended and supported behind and below the foot pool portion 5 c of the floor panel 5, that is, below the seat riser 8.

Further, an upwardly projecting bead portion 5 d is formed in the foot pool portion 5 c of the floor panel 5 so as to extend from the tunnel portion 2 to the rocker member 4. The bead portion 5d has a hat shape with a downward opening cross section that opens downward.

A reinforcing member 11 is disposed in a portion of the tunnel portion 2 where the bead portion 5d coincides with the vehicle longitudinal direction position. This reinforcing member 11 has a hat shape with an upward opening cross section that opens upward, and both end portions 11b formed along the flange portion 2a, the vertical wall portion 2b, and the upper wall portion 2c of the tunnel portion 2, It has a vertical side part 11c and an upper side part 11d, and both end parts 11b extend to the edge of the foot pool part 5c beyond the flange part 2a. The reinforcing member 11 has a flange portion 11a fixed to the inner surface of the tunnel portion 2 by spot welding or the like, and is continuous with the bead portion 5d of the foot pool portion 5c in the vehicle width direction.

Here, the lower surface 11 b ′ of the both end portions 11 b in the vehicle width direction of the reinforcing member 11 is positioned below the lower surface 10 ′ of the fuel tank 10 by a dimension a.

According to the present embodiment, the reinforcing member 11 is arranged so that both end portions 11b thereof extend in the vicinity of the flange portion 2a of the tunnel portion 2, and the lower surface 11b ′ of the both end portions 11b of the reinforcing member 11 in the vehicle width direction. Is positioned below the lower surface 10 ′ of the fuel tank 10, so that both ends 11 b of the reinforcing member 11 can suppress chipping or the like that hits the lower surface 10 ′ of the fuel tank 10 with a jumping stone or the like. In this embodiment, since the chipping suppression does not depend on the side members 3 and 3, the chipping suppression effect is not reduced even when the arrangement interval between the side members 3 and 3 is wide.

  Further, since the reinforcing member 11 and the bead portion 5d on the floor side form a large closed section A at both edges of the opening of the tunnel portion 2, the surface rigidity of the floor panel 5, the torsional rigidity of the tunnel portion 2, and the upper and lower The bending rigidity can be improved, and as a result, the operability can be improved.

In addition, since the bead portion 5d that is continuous with the reinforcing member 11 of the tunnel portion 2 is formed in the portion of the floor panel 5 that constitutes the footrest portion 5c of the occupant, the surface rigidity of the footrest portion 5c that makes the occupant feel vibration easily. It can be improved without adding reinforcement parts dedicated to the floor panel, and vibrations can be suppressed. Moreover, the deformation | transformation of the floor panel 5 at the time of a side collision can be suppressed by the bead part 5d. Thus, since the reinforcement part only for a floor panel is not required, the increase in a weight and cost can be suppressed.

Moreover, the hanger 12a which supports the exhaust pipe 12 arrange | positioned so that it may pass in the said tunnel part 2 can be fixed using the said reinforcement member 11, and a dedicated hanger attachment member can be reduced. Furthermore, although not shown, a bracket for fixing a pipe member such as a brake pipe to the vehicle body can be supported using the reinforcing member 11, and a dedicated support member can be eliminated.

  In the above-described embodiment, the case where the reinforcing member 11 is bent so as to be along the inner surface of the tunnel portion 2 has been described. However, the reinforcing member of the present invention is a reinforcing member 11 ′ indicated by a two-dot chain line in FIG. As described above, the tunnel portion 2 may be disposed so as to span the flange portions 2a and 2a.

  In the above embodiment, the fuel tank is disposed below the rear seat. However, the present invention can also be applied to the case where the fuel tank is disposed below the front seat. The same effect as the example can be obtained.

2 Tunnel part 2a Flange part (both edges of opening)
4 Rocker member 5 Floor panel 5c Foot pool portion 5d Bead portion 10 Fuel tank 10 'Lower surface of fuel tank 11 Reinforcing member 11b Both ends in vehicle width direction 11b' Lower surface of both ends in the vehicle width direction of reinforcing member

Claims (1)

A tunnel portion extending in the vehicle front-rear direction is formed in the center portion of the floor panel in the vehicle width direction with a downward opening cross section hat opening downward, and rocker members extending in the vehicle front-rear direction are disposed on both sides in the vehicle width direction, In the vehicle body structure of the automobile in which the fuel tank is disposed below the rear part of the floor panel occupant's footrest,
In the foot pool of the floor panel, a bead portion protruding upward is formed so as to cross the rocker member from the tunnel portion,
A top-opening cross-sectional hat-shaped reinforcing member that opens upward is disposed so as to extend over both edges of the opening of the tunnel portion,
The vehicle longitudinal direction position is made to coincide with both ends of the reinforcing member in the vehicle width direction so as to be continuous with the tunnel side end of the bead portion,
A vehicle body structure for an automobile, wherein lower surfaces of both ends in the vehicle width direction of the reinforcing member are positioned below the lower surface of the fuel tank.

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