JPH09109923A - Body frame structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a high rigidity without relying on a body shell, by providing a strength member extending in the longitudinal direction of a body, between a driver seat and an assistant seat in a sitting room space. SOLUTION: A frame 1 is composed of two side rails 2; six cross members 3; and two side sill rails 5 connected to the appearance surfaces of the side rails 2 through a torque box 4. And a center rail 13 as a strength member extending in the longitudinal direction of a body is provided between a driver seat and an assistant seat in a sitting room space, and the center rail 13 is connected to a rear bulk head 11 and a front dash board upper 8b at the rear side. Consequently, a high rigidity can be realized without relying upon a body shell. Especially, the buckling strength as to the longitudinal direction of the sitting room space of an open body can be reinforced at a high efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body frame structure for a vehicle.

[0002]

2. Description of the Related Art In a vehicle body structure, such as a ladder type frame, in which a main strength member is provided in an underfloor portion of a vehicle body, the body shell hardly contributes as a strength member. It is common to deal with ensuring rigidity by increasing the plate thickness. In particular, open-type vehicle bodies such as roadsters and convertibles have difficulty in increasing vehicle rigidity because they do not have a fixed roof, and the frame weight tends to increase. As a structure for increasing rigidity in an open-type vehicle body, there is also known a structure in which a strength member that connects left and right side panels above is provided, such as a targa top or a T-bar roof.

[0003]

However, if an attempt is made to increase the strength exclusively by the frame, a huge structure is extended to the side of the seat, which deteriorates the habitability and the entry / exitability, or increases the weight. There is an inconvenience. In addition, the Targa top and the T-bar roof have a member that traverses overhead, and thus has the drawback of impairing the refreshing feeling of being completely open.

The present invention has been devised for the purpose of solving the above-mentioned drawbacks of the prior art and providing a vehicle body frame structure for a vehicle capable of achieving high rigidity without depending on a body shell. It is a thing.

[0005]

To achieve the above object, in the present invention, a strength member extending in the vehicle front-rear direction is provided between a driver's seat and a passenger seat in a living room. And In particular, a strength member in the front-rear direction of the vehicle body is provided so as to connect the rear bulkhead and the front dashboard.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a frame structure for an open vehicle body constructed according to the present invention. This frame 1 basically follows the form of a ladder type frame, and has two side rails 2 and six cross members 3
And two side sill rails 5 connected to the outer surface of each side rail 2 via a torque box 4, the central passenger compartment floor is lowered, and the positions where the front and rear axles are installed are bent upward. And kick up part 6f
・ It is 6r.

Each of these members is a combination of hollow box-shaped closed cross-section members in which a channel member formed by press-forming a steel plate is welded and connected.

To the upper surface of the front end of the side sill rail 5, both ends of a front member 7 which is bent in a generally gate shape are connected. As shown in FIGS. 2 and 3, the front member 7 is configured by welding an outer member 7o and an inner member 7i, which are formed by press-forming a steel plate, and are arranged in front and rear with a space therebetween. It has two box-shaped closed section parts. Then, the front dashboard upper 8 forming a strength member of both of these, particularly extending in the lateral direction of the vehicle body.
The a and 8b are connected by a truss member 9 having a box-shaped closed cross section.

In both front and rear kick-up parts 6f and 6r,
Damper towers 10f and 10r for mounting the upper ends of the dampers of the front and rear suspensions are formed, respectively.
In particular, the upper part of the rear damper tower 10r on the rear wheel side is connected to each other by a rear bulkhead 11 having a box-shaped closed cross section. Further, between the front end surface near the connection portion of the left and right truss members 9 in the front front dashboard upper 8a and the upper portion of the damper tower 10f of the left and right front wheel suspension devices,
They are connected by a front fender upper member 12 having a box-shaped closed cross section. By thus connecting the strength members to the upper parts of the left and right damper towers, the suspension rigidity can be enhanced with high efficiency.

Rear front dashboard upper 8b
Rear bulkhead 1 and a portion near a vertex of a triangle formed by connecting two truss members 9 in the central portion of the
A central rail 13 having a box-shaped closed cross section extending in the front-rear direction is connected to the central portion of No. 1 so that the living room space is divided into left and right portions by shoulder portions. In the open type vehicle body as shown in this embodiment, the center rail 13 extends along the upper surface of the vehicle body.

As described above, it is difficult to increase the rigidity of the open type vehicle body, and it is very difficult to achieve high rigidity, high livability, and weight reduction of the vehicle body while being completely open. Was accompanied by. Therefore, in the present invention, the center rail 13 is provided as a strength member extending in the front-rear direction of the vehicle body between the driver's seat and the passenger seat in the living room. As a result, the overhead is completely opened and the frame member provided under the floor is prevented from becoming large and thick. Needless to say, the present invention can be applied not only to the open type vehicle body shown in the above-described embodiment but also to a vehicle body having a fixed roof.

[0013]

As described above, according to the present invention, the conventional ladder type frame adopts a so-called flat reinforcing structure such as a side sill or a center tunnel for reinforcing the underfloor, so to speak, while the shoulder area of the living room is surrounded. Since the three-dimensional reinforcing structure is formed by extending the members in the front-rear direction, it is possible to highly efficiently enhance the buckling strength in the front-rear direction of the living space of the open vehicle body.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a frame structure for an open-type vehicle body according to the present invention.

FIG. 2 is a partial cross-sectional outline view taken along line II-II in FIG.

3 is a partial cross-sectional outline view taken along the line III-III in FIG.

[Explanation of symbols]

 1 frame 2 side rail 3 cross member 4 torque box 5 side sill rail 6 kick up part 7 front member 8 front dashboard upper 9 truss member 10 damper tower 11 rear bulkhead 12 front fender upper member 13 center rail

Claims (11)

[Claims] 1. A vehicle body frame structure for a vehicle, characterized in that a strength member extending in the longitudinal direction of the vehicle body is provided between a driver's seat and a passenger seat in a living space. Frame structure. 2. The vehicle according to claim 1, wherein the strength member in the front-rear direction of the vehicle body extends between the driver's seat and the passenger seat on the upper surface of the vehicle body of an open type vehicle having no fixed roof. Body frame structure for. 3. The vehicle body frame structure for a vehicle according to claim 1, wherein the strength member in the front-rear direction of the vehicle body is connected between a rear bulkhead and a front dashboard. 4. The front and rear strength member of the vehicle body is directly or indirectly connected to a member for connecting damper mounting towers of left and right suspension devices. Body frame structure for a vehicle according to paragraph. 5. The vehicle body frame structure for a vehicle according to claim 1, wherein the rear bulkhead connects between the damper mounting towers of the left and right rear wheel suspension devices. . 6. The rear bulkhead is provided with a strength member portion having a box-shaped closed cross section, and the strength member in the vehicle front-rear direction is connected to the strength member portion of the rear bulkhead. A vehicle body frame structure for the vehicle according to any one of 5 above. 7. The front dashboard is provided with a strength member portion having a box-shaped closed cross section, and the strength member in the front-rear direction of the vehicle body is connected to the strength member portion of the front dashboard. 7. A vehicle body frame structure for a vehicle according to any one of 6 above. 8. The vehicle body frame structure for the vehicle according to claim 7, wherein the strength member portion of the box-shaped closed cross section of the front dashboard is connected between the left and right side sills. 9. The strength member portion of the box-shaped closed cross section of the front dashboard is connected to the damper mounting towers of the left and right front wheel suspension devices.
A vehicle body frame structure for the vehicle described in. 10. A strength member having a box-shaped closed cross section is formed by a member connecting between a strength member part having a box-shaped closed cross section of the front dashboard and a damper mounting tower of the front wheel suspension device. Item 10. A vehicle body frame structure for a vehicle according to item 9. 11. The strength member portion of the box-shaped closed cross section of the front dashboard is composed of a plurality of portions which are arranged in a row in the front-rear direction and are spaced apart from each other, and these are connected by a truss member having a box-shaped closed cross section. The vehicle body frame according to claim 10, wherein one side of the truss contact is connected to the damper mounting tower, and the other end of the truss contact is connected to the front end of the strength member in the longitudinal direction of the vehicle body. Construction.