JPH0481372A - Car body structure - Google Patents

Abstract

PURPOSE:To obtain a lightweight car body structure having high rigidity by installing ribs inside a car body skelton member and dividing the inside of the car body skelton member by the ribs, in the car body structure having the car body skelton member which is shaped into cylindrical form by a lightweight material. CONSTITUTION:As for a chassis frame 10 formed through Al extrusion molding, a side member 12 is joined with a front cross member 11 at the front edge, and the rear part of the side member 12 is branched into a bifurcated form, and a side shill member 13 is joined with outside and a floor member 14 is joined inside. The rear parts of these members 13 and 14 are joined with a second cross member 15, and a rear side member 16 and a cross member 17 are joined with the cross member 15. Inside the side shill member 13 and the floor member 14, rail guides 13d and 14f are formed by installing ribs 13b and 13c, and the inverted T-figure-shaped seat rails 25 and 26 can be inserted in slidable manner inside the rail guides 13d and 14f through slits 13a and 14e.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Industrial Application Field) The present invention relates to a vehicle body such as an automobile, and particularly to a vehicle body structure such as a floor, a floor frame, and a side sill portion.

(Prior Art) As a conventional vehicle body structure 29, for example, the one shown in FIG. 4 is known. That is, on both side edges of the floor panel 1,
A side sill 2, which is a sheet metal part in which an inner and an outer are joined together in a cylindrical shape, is fixed, and a floor frame 3 is fixed to the lower surface of the floor panel 1 in the longitudinal direction of the vehicle body, and a cross member 4 is fixed to the upper surface of the floor frame 3 in the longitudinal direction of the vehicle body. Constructed for strength. A seat 5 is mounted on the floor panel 1, and in this case, a bracket 6 is fixed to the rear of the cross member 4 on the floor panel 1. Further, an upper rail 8a of a seat slide rail 8 is fixed under the seat control frame of the seat 5, and a lower rail 8b of the seat slide rail 8 is fastened to the cross member 4 and the bracket 6 with bolts 9, respectively. 5 is slidably attached.

(YA problem to be solved by the invention) By the way, according to the above vehicle body structure, both the side sill 2 and the floor frame 3 are made of sheet metal.

Here, the side sills 2 and floor frame 3 have a great influence on the bending rigidity of the entire car body, but these have to be strengthened by increasing their plate thickness, making it difficult to reduce their weight. .

Furthermore, in order to increase the strength of the seat 5 so that it can absorb the force acting on the seat 5 during a collision, the thickness of the seat slide rail 8 is increased, which causes an increase in weight. Furthermore, since the seat slide rail 8 is structured to exist between the seat 5 and the floor panel 1, there is a limit to the reduction in height.

On the other hand, as a means of mounting the seat low,
As shown in Japanese Patent No. 111729, there is one in which a rail member is attached to the lower surface of the floor and a lower rail is fixed to this rail member. Then, the frame legs of the seat are inserted into the rail members through the slits in the floor, and the upper rails of the legs are fitted into the lower rails. However, since separate rail members are attached to the bottom surface of the floor panel, the structure becomes complicated. The height of the seat can be lowered, and since the seat slide rail has a structure in which the upper rail is fitted to the lower rail, similar to the one in Figure 4, it is necessary to increase the rail thickness in order to improve the strength of the rail side in the event of a collision. It must be made thicker, and nine difficulties remain in reducing weight.

Therefore, the purpose of the second invention is to provide a body structure that improves the rigidity of the vehicle body frame member with a light weight and makes it possible to install L seats etc.

[Structure of the Invention (Means for Solving the Problems)] In order to solve the above three problems, the present invention provides a vehicle body structure having a vehicle body frame member formed into a cylindrical shape from a lightweight material. The vehicle is characterized in that it has a rif, and the interior of the vehicle body frame is partitioned by the rib.

(Function) According to the above configuration, the vehicle body frame member is made of lightweight material and reinforced by the reinforcing ribs, making it lightweight and highly rigid.

Since the inside of this vehicle body frame member is partitioned by reinforcing ribs, the inside of the partition can be used as an air conditioning duct, a lower rail of a seat slide, etc.

(Example) This invention will be explained in detail below.

FIG. 1 is a cross-sectional view showing a vehicle body structure according to an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a perspective view showing the overall structure of a chassis frame. Differently, the vehicle has a chassis frame 10 as a vehicle body frame member formed by extrusion of aluminum, and the vehicle body is assembled to this chassis frame 10.

The chassis frame 10 is made of a lightweight material such as aluminum alloy, and is constructed by combining various members extruded into a ladder shape with a rectangular cylindrical cross section so as to provide reinforcing ribs and the like inside. That is, the side member 12 is joined to the front cross member 11 at the front end, the rear part of the side member 12 is bifurcated, and the side sill member 13 is joined to the outside and the floor member 14 is joined to the inside. These members 13 and 14 are arranged in parallel toward the rear at the same height, and their rear parts are joined to the second cross member 15.
In addition to 5, rear side member 16 and cross member 17
are joined. In this way, by combining these aluminum members, the vehicle body is constructed to be lightweight and have high rigidity against bending, etc. of the entire vehicle body.

A slit 13a is provided in the axial direction at a position near the center of the upper surface of the side sill member 13. Also,
As shown in FIG. 1, inside the side sill member 13,
A vertical rib 13b is provided, and a clear rib 13C is provided directly below the slit 13H to partition the inside of the side sill member 13 and form a rail guide 13d.

The outer surface of the side sill member 13 is provided with support flanges 13e, 13f for mounting door weather strips 30, 31.

On the other hand, a floor mounting flange 14a is provided near the rear of the floor member 14, and a gate-shaped rib 14b is provided with its lower part integrally connected in the internal axial direction as shown in FIG. do.

A partition rib 14c is provided on the gate-shaped rib 14b, an air conditioner duct 14d is formed at the lower part, and a rail guide 14f is formed along with a slit 14e at a part of the upper part.

Next, the connection structure of the vehicle body to the chassis frame 10 will be described. As shown in FIG. 1, a floor panel 21 is connected by welding or the like onto a floor member 14 and a side sill member 13 that are at the same height.

Further, a door 22 is assembled to the outside of the side sill member 13 so as to contact and close the door 22. The air conditioner duct 14d of the floor member 14 communicates with the air conditioner unit 23 via the duct 22 as shown in FIG.
It opens to the rear seat side through the hole 14g.

On the other hand, in the seat mounting section, an inverted-shaped seat rail 25 is installed inside the rail guide 13d of the side sill member 13.
is slidably inserted from the rear end through the slit 13a. Note that the seat rail 25 is inserted before the side sill 13 is assembled as shown in FIG. Further, the seat rail 26 is slidably inserted into the inside of the rail guide 14f of the floor member 14 through the slit 14e1 and the slit 21a of the floor 21. It is the same as above that the seat rail 26 is also inserted before the assembly shown in FIG.

Then, the bracket 7 of the frame of the seat 5 or the bolt 27 is integrally connected onto these seat rails 25 and 26.

Due to the vehicle body structure of this embodiment, the side sill members 13, floor members 14, etc. of the chassis frame 10 are made of extruded aluminum, and each of the internal ribs 13b, 13c, 14
b and 14c suppress deformation due to bending or twisting, and thus the product becomes light and highly rigid. Here, the side sill member 13 is set below the floor panel 21, and in particular, the bending rigidity is significantly increased by the vertical rib 13b and the horizontal rib 13c that suppresses the horizontal deformation of the vertical rib 13b.

Therefore, the bending rigidity of the entire vehicle body is significantly increased, which is extremely advantageous against vibrations, etc., and since the large chassis frame 10 is made of aluminum, an increase in weight can be suppressed.

Input from the seat 5 side at the time of a collision is transmitted via the seat rail 25, but can be received by the entire side sill member 13 due to the presence of the ribs 13b and 13C. Further, on the floor member 14 side, the load from the seat 5 is transmitted to the floor member 14 via the rib 14b, and the load from the floor member 14 is transmitted to the entire floor panel 21 via the flange 14a. Therefore, the support of the seat 5 is extremely stable.

Loads from the front of the vehicle body at the time of a collision can be reliably received by the side sill members 13 and floor members 14, which have high bending rigidity, and can be absorbed by the entire vehicle body. Therefore, the deformation of the cabin is suppressed. Even in the event of a side collision, the side sill member 13 with high bending rigidity absorbs the load and suppresses deformation of the cabin.

As the position of the side sill member 13 is lowered, the position for getting on and off the vehicle is also lowered, making it easier to get on and off the vehicle.

When the air conditioner is in use, conditioned air from the air conditioner unit 23 is sent to the rear seats via the duct 14d of the floor member 14. At this time, the floor 21 is heated or cooled by the floor member 14, thereby increasing the air conditioning effect inside the vehicle compartment.

Furthermore, since the rail guides 13d and 14f of the seat 5 are buried under the floor panel 21, the height of the seat 5 can be made lower, and the lifter adjustment range of the seat 5 can also be greatly expanded.

Note that this invention is not limited to the above embodiments.

For example, it is also possible to apply the present invention to roof rails, etc., and to form an air conditioner duct or the like using rib sections.

[Effects of the Invention] As is clear from the above, according to the present invention, a lightweight and highly rigid vehicle body frame member can be obtained by reinforcing the ribs and using lightweight materials. Additionally, the ribbed sections can be used as seat rails or as air conditioner ducts.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a perspective view of a chassis frame, and FIG. 4 is an exploded perspective view of a conventional example.

Claims (1)

[Claims] A vehicle body structure having a vehicle body frame member formed into a cylindrical shape from a lightweight material, characterized in that the vehicle body frame member is provided with a rib inside the vehicle body frame member, and the interior of the vehicle body frame member is partitioned by the rib.