JPS6350219Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to the lower body structure of an automobile from the front side frame to the side sill, and particularly relates to measures to prevent deformation of the interior of the vehicle when the front side of the automobile is involved in a collision.

(Prior Art) Conventionally, as a lower body structure extending from the front side frame to the side sill of an automobile, for example, as shown in FIG. The lower panel b is joined substantially perpendicularly, and the inner panel c is attached to the outer end of the needle lower panel b.
It is known that the front end portions of a side sill e formed in a closed cross-section by a side sill e and an outer panel d are butted and joined (see Japanese Utility Model Application No. 57-63785).

(Problem to be Solved by the Invention) However, in the above-mentioned conventional device, although the front side frame a and the side sill e are formed into a highly rigid closed cross-sectional shape, the dart lower panel b is a low rigid one-piece structure. Since it is made of a single plate, when the front side of the vehicle collides, the collision load received by the front side frame a is not transmitted to the side sill e via the dart lower panel b, causing the dart lower panel b to deform. As a result, there was a problem that the interior of the vehicle was significantly deformed.

The purpose of this invention is to prevent deformation of the vehicle interior by reliably transmitting and absorbing the collision load received during a frontal collision to the side sills using a simple structure that utilizes a highly rigid closed-section torque box. The purpose is to prevent it.

(Means for Solving the Problems) In order to achieve the above object, the structure of the present invention is arranged at the side end of the floor surface of the vehicle compartment, and configured to have a closed cross-sectional shape extending in the longitudinal direction of the vehicle body by an inner panel and an outer panel. a torque box configured in a closed cross-sectional shape by a vertical wall portion rising upward from the front end of the vehicle compartment floor portion and a box member extending in the vehicle width direction along the vertical wall portion; a reinforcement arranged in the cross section and joined to the inner panel and the outer panel, respectively, the reinforcement and the outer panel are provided to protrude forward than the inner panel, and the interior surface of the vehicle at the protruding portion of the reinforcement is provided. The outer ends of the inner side and outer side of the torque box are respectively joined to each other, and the inner side of the torque box is joined to the front end of the inner panel.

(Function) With the above configuration, in the present invention, the collision load received at the time of a frontal collision is transmitted via the torque box to the side sill, which is connected to the torque box, the front end of the reinforcement, and the side sill inner panel, and is received by the side sill. It was designed to make it last longer.

(Effect of the invention) Therefore, according to the invention, the collision load at the time of a frontal collision is absorbed by the side sill, which is firmly connected to the torque box, the front end of the reinforcement, and the side sill inner panel via the highly rigid torque box. Since the collision load can be transmitted to and received by the side sills, deformation of panels constituting the vehicle interior, such as the lower panel of the vehicle, due to the collision load can be suppressed as much as possible, thereby suppressing deformation inside the vehicle interior.

(Example) Hereinafter, an example as a specific example of the present invention will be described based on the drawings.

1 to 3 show a lower vehicle body structure on the front right side of an automobile compartment according to an embodiment of the present invention, in which 1 is a front side frame with a closed cross section extending in the longitudinal direction of the vehicle body, and 2 is the front side frame. A floor panel 1 is provided horizontally on top of the floor panel 2 and has a front end inclined upwardly toward the front. 3 is a dart lower panel that is joined to the upper end of the front end inclined portion 2a of the floor panel 2 and extends upward. A portion of the floor panel 2 excluding the front end inclined portion 2a constitutes a vehicle interior floor surface portion. Further, the front end inclined portion 2a and the dart lower panel 3 constitute a vertical wall rising upward from the front end of the vehicle interior floor surface portion.

A side sill 4 extending in the longitudinal direction of the vehicle body is provided at the right end of the floor panel 2, and together with the floor panel 2 and the lower darts panel 3, constitutes the inner surface of the front right side of the passenger compartment of the automobile.
The side sill 4 consists of an inner panel 5 on the inside of the vehicle and an outer panel 6 on the outside of the vehicle whose front end protrudes forward from the inner panel 5.The upper ends of both panels 5 and 6 are joined to each other, and the lower ends are connected to the floor panel 2.
It is configured to have a closed cross-section by joining to. Furthermore, a reinforcement 7 is disposed within the side sill 4 to increase the rigidity of the side sill 4. The reinforcement 7 is provided to protrude further forward than the inner panel 5,
Its upper end is joined to the joint between the inner panel 5 and the outer panel 6, and its lower end is joined to the floor panel 2 together with the lower end of the outer panel 6.

Furthermore, the front end inclined portion 2a of the floor panel 2
A box member 8 having a U-shaped cross section extending in the vehicle width direction (left and right direction) is joined to the lower surface at both front and rear ends, and the box member 8 and the floor panel front end inclined portion 2a generate a closed cross section torque. Box 9 is configured. The left end of the box member 8 is joined to the side surface of the front side frame 1. Further, on the interior side of the vehicle at the protruding portion of the reinforcement 7 that protrudes forward from the front end of the side sill inner panel 5, the interior side of the torque box 9 (the portion constituted by the front end inclined portion 2a of the floor panel 2) is provided. and the outer end (right end) of the vehicle outer side portion (portion constituted by the box member 8) are joined. Further, the front end of the side sill inner panel 5 is joined to the vehicle-inward side portion of the torque box 9 (the portion constituted by the front end inclined portion 2a of the floor panel 2).

Note that 10 is a hinge pillar consisting of an inner hinge pillar 10a and an outer hinge pillar 10b, 11 is a hinge attachment portion for attaching a right front door (not shown), and 12 is a cowl side panel.

Therefore, in the above embodiment, when the front side of the automobile collides, the collision load is transmitted from the front side frame 1 to the torque box 9, but the torque box 9 is formed in a closed cross-section shape and has high rigidity. Since the torque box 9 is firmly connected to the front end of the reinforcement 7 of the side sill 4 and the inner panel 5, the collision load is transmitted to the side sill 4 via the torque box 9. Therefore, since the side sill 4 reliably bears the load, almost no collision load is applied to the floor panel 2 or the lower darts panel 3, which are made of a single plate with low rigidity as in the past, and deformation of both panels 2 and 3 is prevented. This can be suppressed as much as possible, and therefore deformation of the interior of the vehicle at the time of a collision can be suppressed.

Furthermore, the front end of the side sill inner panel 5 is joined to the interior side surface of the torque box 9 to ensure the mounting strength in the longitudinal direction between the torque box 9 and the side sill 5, so that collision load components in the longitudinal direction are transferred from the torque box 9 to the side sill. 4, and the right end of the torque box 9 is joined to the interior side of the vehicle at the front end of the reinforcement 7 of the side sill 4, ensuring the mounting strength in the left and right direction between the torque box 9 and the side sill 5. The collision load components in the left and right directions can also be reliably transmitted from the torque box 9 to the side sills 4, thereby making it possible to more effectively suppress deformation within the vehicle interior during the collision.

In the above embodiment, the torque box 9 is formed by joining the box member 8 to the front end inclined portion 2a of the floor panel 2, but the torque box 9 having a closed cross section is formed by joining to the lower dashboard panel 3. You can do it like this. Although the torque box 9 is formed by joining the box member 8 to the outside of the vehicle interior of the front end inclined portion 2a, the torque box 9 is also joined to the inside of the vehicle interior of the front end inclined portion 2a or the inside of the vehicle interior of the dart lower panel 3. may be formed.

[Brief explanation of drawings]

Figures 1 to 3 show embodiments of the present invention;
The figure is a perspective view from inside the car, and Figure 2 is the same as Figure 1.
A line sectional view, Figure 3 is a - line sectional view of Figure 2,
FIG. 4 is a perspective view of main parts showing a conventional example. 4...Side sill, 5...Inner panel, 6...
...Outer panel, 7...Reinforcement,
9... Torque box.

Claims (1)

[Scope of utility model registration request] A side sill arranged at a side end of the cabin floor and configured with a closed cross-sectional shape extending in the longitudinal direction of the vehicle body by an inner panel and an outer panel; a vertical wall portion rising upward from the front end of the cabin floor; A torque box configured with a closed cross-sectional shape by a box member extending in the vehicle width direction along the wall portion, and a reinforcement arranged within the closed cross-section of the side sill and joined to the inner panel and the outer panel, respectively. , the reinforcement and the outer panel are provided to protrude forward from the inner panel, and the outer ends of the inboard and outboard parts of the torque box are located on the inboard side of the protruding portion of the reinforcement, respectively. In addition to being joined,
A lower body structure for an automobile, characterized in that an inner side portion of a torque box is joined to the front end of the inner panel.