JPH02124383A - Sub-body structure of car - Google Patents

Abstract

PURPOSE:To enhance the rigidity of joints of a side sill with the left and right ends of a floor panel by providing it with a stepped-up part at its joint with the side sill, and by jointing to this part a side sill inner member and a reinforcement. CONSTITUTION:In a sub-body structure of a car, in which the ends of a floor panel 7 in the direction across the car width are retained by a side sill 8, the side sill 8 is composed of a side sill outer 8a and inner 8b and a reinforcement 8c arranged between these two outer, and inner. The floor panel 7 is provided with a stepped-up part 15 swelling up in the neighborhood of the end of floor panel, and the outer end of this stepped-up part 15 is raised so as to transfer to the side sill inner 8b. The reinforcement 8c is so constructed that its position extending aslant upward from a bottom plate 22, which stretches inward from the bottom of a vertical portion 21, is jointed with the undersurface of the stepped-up part 15, and that the horizontal part 23 at the bottom of the outer 8a is jointed with this bottom plate 22.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lower body structure of an automobile, and more specifically, to a structure of a joint between a floor panel and a side sill forming a lower portion of a passenger compartment of an automobile.

[Prior Art] As is generally well known, the floor panel that forms the floor surface of the passenger compartment of an automobile is joined and held at both ends by a pair of left and right side sills extending in the longitudinal direction of the vehicle body. There is. Usually, the floor panel and the side sill are joined by providing a flange portion at the end of the floor panel, abutting the flange portion against the side surface portion of the side sill, and welding the flange portion. That is, in this case, the portion of the side sill below the joint portion protrudes below the lower surface of the floor panel.

By the way, in sports cars that enjoy high-speed driving and a powerful sense of acceleration, the aerodynamic characteristics of the vehicle body are particularly important in order to improve high-speed stability. In order to improve the aerodynamic characteristics of a vehicle by reducing air resistance and lift acting on the vehicle while it is running, it is necessary to make the lower surface of the vehicle floor as flat as possible and to lower the vehicle height as much as possible.

If the floor panel and side sill of such sports cars are joined using the normal method described above, the bottom of the side sill protrudes below the floor panel, which prevents the bottom surface of the floor from becoming flat. There is a problem.

Regarding this problem, for example, in Japanese Utility Model Application Publication No. 59-139468, as shown in FIG. A floor side structure has been proposed in which the upper end of the side sill inner 58b is joined to the upper end of the side sill inner 58b, and the lower end of the side sill inner 58b is joined to the upper surface of the floor panel 57.

[Problems to be Solved by the Invention] However, in the above floor side structure, it is true that by integrally forming the floor panel 57 and the side sill outer 58a, it is not possible to lower the floor panel 57 to the height of the lower end of the side sill 58. Although it is possible to flatten the lower surface of the floor and lower the vehicle height, since the side sill outer 58a is integrally molded with the floor panel 57, the degree of freedom in molding the side sill outer 58a is small. There was a problem in that when changing the external design of the floor panel 58, the mold for the entire floor panel 57 had to be changed.

Further, it is usually necessary to provide a piping groove below the floor for inserting pipes and cables extending in the longitudinal direction of the vehicle body. In the above floor site structure, a part of the floor panel 57 is raised upward to provide a protrusion 55 along the longitudinal direction of the vehicle body, and below this protrusion 55,
For example, the groove portion 55a into which the pipes 56, . . . , 56 are inserted
However, it is necessary to provide the protrusion 55 inward from the joint between the side sill 58 and the floor panel 57, which may become an obstacle when installing a seat or the like on the floor panel, and may reduce the vehicle height. The problem was that it had a disadvantageous effect on lowering the

This invention was made in view of the above problems, and it is possible to realize a flat lower surface of the floor, lower the vehicle height, and improve the degree of freedom in forming the side sill outer of an automobile. The purpose is to provide a lower body structure.

[Means for Solving the Problems] Therefore, the present invention provides a lower body structure for an automobile in which side sills are joined to both left and right ends of a floor panel, in which the side sills are composed of an outer member, an inner member, and a reinforcing member. In addition, a stepped portion is provided at the joint portion of the floor panel to the side sill, an inner member of the side sill is joined to the stepped portion, and a reinforcing member of the side sill is attached to the floor panel at the stepped portion. and the outer member of the side sill is joined to the flat lower surface of the reinforcing member.

[Effects of the Invention] According to the invention, by configuring the joint between the floor panel and the side sill as described above, and by aligning the vertical position of the flat lower surface portion of the reinforcing member of the side sill with the floor panel. Since the lower end of the outer member of the side sill and the floor panel can be arranged in substantially the same horizontal plane, the lower surface of the floor can be made flat, and the aerodynamic characteristics of the vehicle body can be improved.

In addition, by appropriately setting the height and width of the raised part, the groove formed below the raised part can be used as a piping groove through which pipes extending in the longitudinal direction of the vehicle body are inserted. can do. As a result, when installing the seat on a floor panel, the groove is located at the base of the side sill where it does not interfere with the seat, so it does not cause any obstruction when installing the seat on the floor panel. By setting the hip point lower when the occupant is seated, the vehicle height can be lowered, and the aerodynamic characteristics of the vehicle body can be improved.

Furthermore, since the outer member of the side sill is formed separately from the inner member and the Nli strong member, it is possible to reduce restrictions when molding the outer member and increase the degree of freedom in molding. It can easily accommodate external design changes.

Further, by forming a stepped portion at the joint between the side sill and the floor panel, the rigidity of this joint can be improved.

[Example] Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

FIG. 2 is a perspective view schematically showing the lower structure of the front part of the vehicle compartment of the automobile according to this embodiment. A dash panel 4 that rises upward from the front end of a floor panel 7 that forms the floor surface of the passenger compartment 3 and forms the front end of the vehicle compartment 3 is disposed. A frame 2 is provided, and the rear end of the front frame 2 is abutted against and joined to the front surface of the dash panel 4. On the other hand, the front frame 2 is located on the rear side of the dash panel 4, that is, on the passenger compartment 3 side.
The front end of the floor frame 6, which is arranged to extend in the rearward direction of the vehicle body surface, is abutted and joined to the part corresponding to the joint part.

Also, the end portion of the floor panel 7 in the vehicle width direction is held 4-
The front end of the side sill 8 is joined to the lower part of the Gunyu panel 4, and the lower end of a door hinge pillar 9 extending upward perpendicularly to the side sill 8 is joined to the middle of the side sill 8. Although not specifically shown in the drawings, the floor frame 6 extends in the longitudinal direction of the vehicle body along the upper surface of the floor panel 7, and then is bent outward at a predetermined position in the executive direction, and its rear end is shaped like the one described above. side sill 8
is joined to the inner surface of the

Further, a reinforcing panel II is provided at the lower part of the rear side of the dungeon panel 4, and is provided between the floor frame 6 and the side sill 8, and the reinforcing panel II is attached to the dash panel 4 at the front end. Along with being joined to
Both ends in the vehicle width direction are the side sills 8 and floor frame 6
The floor panel 7 is fixed to the upper surface and is attached to the floor panel 7 at the lower end.
is joined to. That is, the reinforcing panel 11, the dash panel 4, the side sill 8, the floor frame 6, and the floor panel 7 constitute a hook-shaped panel structure (2) that forms a closed space.

In the lower vehicle body structure as described above, the front frame 2 and the floor frame 6 are connected in the longitudinal direction of the vehicle body through the dash panel 4, so that the rigidity in the longitudinal direction of the vehicle body can be improved, and Since the floor frame 6 is arranged on the upper surface of the floor panel 7, it does not hinder the flattening of the lower surface of the floor panel 7. Furthermore, by forming the panel structure 12,
Since the dash panel 4, side sill 8, floor frame 6, and floor panel 7 can be integrally connected via the reinforcing panel 11, the rigidity of this part can be greatly improved, contributing to an improvement in the vehicle body rigidity. It is now possible to do so.

By the way, in this embodiment, when joining the floor panel 7 and the side sill 8, the main purpose is to easily make the floor panel 7 flat and to increase the degree of freedom in changing the design of the outer surface of the side sill 8. For this purpose, a stepped portion is provided at the joint between the floor panel 7 and the side sill 8.

The joint portion between the floor panel 7 and the side sill 8 will be described above.

As shown in FIG. 1, the side sill 8 according to this embodiment is
A side sill outer 8a forming the outer surface part, a side sill inner 8b forming the inner surface part, and a reinforcement 8 disposed between the tongues and reinforcing the side sill 8.
It is composed of c.

The Xydocill inner 8b is formed integrally with the floor panel 7 by extending the end of the floor panel 7, and the floor panel 7 forms an upwardly raised stepped portion 5 near the end. After that, it is further raised upward from the outer end of the stepped portion 15 to form the side sill inner 8b.

That is, a stepped portion 15 is provided at the joint portion of the floor panel 7 with the side sill 8.

Further, the reinforcement 8c has a flat bottom portion 2 extending inward from the lower end of the plate-like vertical ff (21).
2, which extends diagonally upward inward from the end of the bottom portion 22 and is joined to the lower surface of the stepped portion 15. Furthermore, the upper end of the side sill outer 8a is joined to the upper end of the side sill inner 8b together with the upper end of the reinforcement 8c, while the horizontal part 23 at the lower end is connected to the lower surface of the flat bottom 22 of the reinforcement 8c. It is joined.

When joining the side sill 8 and the floor panel 7, the side sill outer 8a and the reinforcement 8c are first assembled to form a subassembly, and this subassembly is attached to the side sill inner 8b1.
That is, it is connected to the end of the floor panel 7.

As explained above, according to this embodiment, by configuring the joint portion between the floor panel 7 and the side sill 8 as described above, the vertical position of the bottom portion 22 of the reinforcement 8c can be adjusted to the floor panel 7. By matching, the lower end horizontal portion 23 of the side sill outer 8a and the floor panel 7 can be arranged in approximately the same horizontal plane, and the lower surface of the floor can be made flat, thereby improving the aerodynamic characteristics of the vehicle body l. This is possible.

Further, the height and width of the stepped portion 15 are appropriately set, and the groove portion 15a formed below the stepped portion I5 is connected to a pipe 16, for example, extending in the longitudinal direction of the vehicle body. ..., 1
It can be used as a piping groove into which a pipe such as 6 is inserted. As a result, when the front notebook 5 (see FIG. 1) is installed on the floor panel 7, the groove 15a is located at the base of the side sill 8 that does not interfere with the front seat 5. This does not pose a particular obstacle when installing the seat on the floor panel 7.The hip point when the passenger is seated can be set lower, lowering the vehicle height, and improving the aerodynamic characteristics of the vehicle body. be able to.

Furthermore, since the side sill outer 8a is formed separately from the side sill inner 8b and the reinforcement 8c, it is possible to reduce restrictions when forming the side sill outer 8a and increase the degree of freedom in forming the side sill outer 8a. This makes it possible to easily accommodate changes in the external design.

Furthermore, by forming the stepped portion 15 at the joint between the side sill 8 and the floor panel 7, the rigidity of this joint can be improved.

In the above embodiment, the side sill inner 8b was integrally formed by extending the end of the floor panel 7, but the two are formed separately and a raised part is formed at the end of the floor panel. A side sill inner formed separately may be joined to this stepped portion.

[Brief explanation of the drawing]

FIG. 1 is for explaining the joint between the floor panel and side sill according to the embodiment of the present invention, so A in FIG.
FIG. 2 is a perspective view of the lower part of the vehicle body according to the above embodiment, and FIG. 3 is a cross-sectional view of the joint between the floor panel and the side sill according to the conventional example. 1... Vehicle body, 7... Floor panel, 8... Side sill, 8a... Side sill outer, 8b... Side sill inner, 8c... Reinforcement! 5...
- Raised part, 22...bottom of reinforcement. Figure 1\

Claims (1)

[Claims] (1) A lower body structure for an automobile in which side sills are joined to both left and right ends of a floor panel, wherein the side sills are composed of an outer member, an inner member, and a reinforcing member, and the floor panel is joined to the side sills. A raised part is provided at the raised part, an inner member of the side sill is joined to the raised part, a reinforcing member of the side sill is joined to the floor panel at the raised part, and an outer member of the side sill is reinforced. An automobile lower body structure characterized by being joined to the flat lower surface of a member.