JPH10264863A - Floor structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the compatibility of making the floor surface of an automobile in a flat floor and in a low floor. SOLUTION: While about a plate form floor panel 2 is extended between the left side and the right side side sills 1a and 1b, the composition of a cross member 5 in the car width direction erected between the left side and the right side side sills 1a and 1b is made consisting of a pair of the left and the right upper members 3a and 3b which are extended to the inner side from the side sills 1a and 1b, separating their opposing inner ends each other, and combined to the upper surface of the floor panel 2; and a lower member 4 which is combined to the lower surface of the floor panel 2 in order to connect the opposing inner ends of the upper members 3a and 3b each other through the floor panel 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle floor structure, and more particularly to a vehicle floor structure in which a cross member in the vehicle width direction is provided between left and right side sills.

[0002]

2. Description of the Related Art A vehicle in which an engine mounted on a front part of a vehicle body drives a front wheel does not require a propeller shaft for transmitting engine driving force to a rear wheel. Although a center tunnel for accommodating the shaft is unnecessary, it is common to adopt a structure leaving the center tunnel in order to secure the rigidity of the floor portion. However, this center tunnel is not preferable from the viewpoint of improving the livability.

[0003] Based on this viewpoint, the center panel is eliminated and the floor panel is flattened, while the rigidity of the floor portion is ensured by a cross member in the vehicle width direction provided between left and right side sills. Such a floor structure is known.

[0004]

However, in such a floor structure, if the cross member is provided above the floor panel, the cross member protrudes from the upper surface of the floor panel, and there is still a step on the floor surface. Will remain. On the other hand, if a floor panel is provided on the upper side of the cross member, on the other hand, the floor surface can be flattened, but the floor surface becomes high. There was an inconvenience that they could not be well balanced.

[0005]

In order to solve such a problem and to achieve both a flat surface and a low floor,
In the present invention, in a vehicle floor structure having a substantially flat floor panel stretched between left and right side sills and a vehicle width direction cross member spanned between the left and right side sills, the cross member is A pair of left and right upper members extending inward from the left and right side sills and coupled to the upper surface of the floor panel with their opposing inner ends separated from each other; and the opposed inner ends of the pair of left and right upper members And a lower member connected to the lower surface of the floor panel so as to communicate with each other via the floor panel.

According to the above structure, the left and right upper members protrude from both sides of the upper surface of the floor panel in the vehicle width direction. If the front seats are disposed here, the floor is substantially flat for the occupant. Face can be obtained. Therefore,
Since the foot of the rear occupant is flat and the foot space is enlarged, the livability is improved and the movement between the left and right seats is facilitated. In addition, there is no step on the floor surface between the left and right front seats, and a large height above the floor can be secured.
So-called walk-through, in which the occupant passes between the left and right front seats, becomes possible.

On the other hand, although the lower member protrudes toward the lower surface of the floor panel, it only needs to occupy the central portion in the vehicle width direction. Therefore, an outdoor pipe such as an exhaust pipe is disposed in a vacant space on both sides. be able to. Thereby, the height dimension of the lower structure of the floor panel is reduced as a whole, and a lower floor can be achieved.

In addition, the upper and lower members partially overlap each other via the floor panel and are rigidly connected to each other with a sufficiently large joint cross-sectional area.
The rigidity of the floor can be increased. In addition, since the cross member is vertically divided across the floor panel, an external force input at the time of a side collision can be appropriately dispersed to the floor panel.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

FIG. 1 shows a floor structure of an automobile according to the present invention. This floor structure has left and right side sills 1
a, 1b, and a pair of left and right upper members 3a, extending inward in the vehicle width direction from the left and right side sills 1a, 1b and coupled to the upper surface of the floor panel 2. 3b, and a cross member 5 in the vehicle width direction comprising a lower member 4 coupled to the lower surface of the floor panel 2 so as to connect inner ends of the left and right upper members 3a and 3b which are spaced apart and opposed to each other. And four vertical members 6 to 9 extending in the vehicle longitudinal direction substantially orthogonal to the cross member 5 along the lower surface of the floor panel 2.

The left and right edges of the floor panel 2 are connected to the lower ends of the inner surfaces of the left and right side sills 1a and 1b, respectively, and from the inner surfaces of the upper side sills 1a and 1b, the left and right upper members 3a and 3b. Are each extended diagonally downward. These left and right upper members 3a and 3b
Has a hat-shaped cross-section, and the lower surface of the flange portion is joined to the upper surface of the floor panel 2 by welding.
The upper surfaces of the left and right upper members 3a and 3b are each formed in a shape inclined downward toward the inside.

The lower member 4 has a hat-shaped cross section, and the upper surface of the flange portion is joined to the lower surface of the floor panel 2 by welding. The lower member 4 is provided such that both left and right ends thereof vertically overlap the inner ends of the left and right upper members 3a and 3b, and the lower member 4 and the left and right upper members 3a and 3b are sufficiently disconnected. They are rigidly connected to each other by the area so that required rigidity can be secured. Further, an external force input to the side sills 1a and 1b at the time of a side collision is transmitted to the floor panel 2 via the upper members 3a and 3b, and is dispersed here widely.

Each of the vertical members 6 to 9 has a hat-shaped cross section, and the upper surfaces of the flange portions projecting from both sides are joined to the lower surface of the floor panel 2 by welding.
The left and right outer vertical members 6 and 9 are upper members 3 respectively.
a, 3b is connected to the floor panel 2 from below.
The left and right inner vertical members 7 and 8 are lower members 4 respectively.
Are connected in a cross shape. An outdoor pipe 10 is provided between the left outer vertical member 6 and the lower member 4, and an exhaust pipe 11 having an elliptical flat cross section is provided between the right outer vertical member 9 and the lower member 4. Are arranged respectively. As described above, although the lower member is provided so as to protrude to the lower surface side of the floor panel 2,
It only occupies a part in the vehicle width direction, and the outdoor pipe 10 and the exhaust pipe 11 are conveniently arranged in the vacant space, so that the floor panel 2 can be arranged low.

As shown in FIG. 2, the rear ends of the vertical members 6 to 9 are connected to a rear cross member 12 extending between the left and right side sills 1a and 1b in the vehicle width direction. On the other hand, the front ends of the left and right outer vertical members 6 and 9 both extend to the dashboard lower portion 13. The front end of the left inner vertical member 7 extends obliquely forward so as to accommodate the catalytic converter 14 and the like, avoiding the stepped portion 15 whose lower surface is concave. The front end of the right inner vertical member 8 is a step 15
And is connected to the left end of a horizontal member 16 extending in the vehicle width direction with the left inner vertical member 7 interposed therebetween. A sub member 17 extends obliquely forward from the front half of the right outer vertical member 9 toward the step portion 15.

The sub member 17 and the right inner vertical member 8
An exhaust pipe 11 extending obliquely rightward from the catalytic converter 14 extends from the front end. The exhaust pipe 11 extends rearward along the inside of the right outer vertical member 9, and is connected to a primary chamber 19 behind the rear cross member 12. A secondary chamber 21 is connected to the primary chamber 19 via an exhaust pipe 20.

Both the primary and secondary chambers 19.2
As shown in FIG. 3, a fuel tank 1 is provided on a lower surface side of a rear panel 22 extending rearward of the rear cross member 12.
8 are arranged. A rear seat 23 is provided on the upper surface side of the rear panel 22, and a trunk space is formed behind the rear seat 23.

On the other hand, on the upper surface side of the floor panel 2, a front seat 24 is provided so as to cover the upper members 3a and 3b, respectively.
Are disposed on both left and right sides. This provides a substantially flat floor surface for the occupant. That is, the floor panel 2 portion under the feet of the occupant seated on the rear seat 23 and the floor panel 2 portion between the left and right front seats 24 through which the occupant moving between the front and rear seats 23 and 24 during the walk-through can pass. , A flat floor surface with no steps is formed.

[0018]

As described above, according to the present invention, the floor surface can be provided to be low and substantially flat for the occupants, so that the livability can be improved, for example, the foot space can be increased and the walk-through can be facilitated. -A great effect can be achieved in enhancing convenience. In addition, since the upper and lower members are connected to each other with a sufficiently large cross-sectional area via the floor panel, there is a great effect in increasing the rigidity of the floor. Moreover, since the cross member is provided in a vertically divided state with the floor panel interposed therebetween, an advantage of appropriately distributing an external force at the time of a side collision can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a floor structure of an automobile configured according to the present invention, divided in a vehicle width direction.

FIG. 2 is a plan view of the floor structure shown in FIG.

FIG. 3 is a longitudinal sectional view showing the floor structure shown in FIG. 1 divided into front and rear directions of a vehicle body.

[Explanation of symbols]

 1a ・ 1b Side sill 2 Floor panel 3a ・ 3b Upper member 4 Lower member 5 Cross member 6-9 Vertical member 10 Outdoor piping 11 Exhaust pipe 12 Rear cross member 13 Dashboard lower part 14 Catalyst converter 15 Step 16 Side member 17 Sub member 18 Fuel tank 19 Primary chamber 20 Exhaust pipe 21 Secondary chamber 22 Rear panel 23 Rear seat 24 Front seat

Claims (1)

[Claims] 1. An automobile floor structure comprising a substantially flat floor panel stretched between left and right side sills and a vehicle width direction cross member spanned between the left and right side sills. A pair of left and right upper members extending inward from the left and right side sills and coupled to the upper surface of the floor panel with their opposing inner ends separated from each other; A floor structure for an automobile, comprising: a lower member coupled to a lower surface of the floor panel so that inner ends thereof communicate with each other via the floor panel.