JPS59109468A - Car body structure - Google Patents

Abstract

PURPOSE:To increase the rigidity around a dash lower and suppress engine vibrations and steering vibrations by connecting a front side member and a floor side member in one unit at a dash floor portion with a joint member. CONSTITUTION:Closed-cross section structures of a front side member 6 longitudinally reinforcing a car body under a hood ledge panel 7 and a floor side member 5 longitudinally reinforcing a car body below a floor panel 4 are connected in one unit with a joint member 10 penetrating a closed-cross section 3 at the lower front of a dash lower panel 1 and forming a closed-cross section with the dash lower panel 1. Accordingly, the bending rigidity and torsional rigidity around the dash lower is increased. In addition, joint members 10 on both sides are united with a reinforce 11 connected to the bottom wall of a dash cloth member 2 and forming a closed-cross section, thereby reducing steering vibrations during idling.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the body structure of an automobile, and in particular to the structure around the darts lower of a front engine/front drive (F-F) type vehicle.

Figure 1 shows the structure around the darts lower panel of conventional F and F type cars.
A rising wall 1b is formed following the slanted wall 1a, and a wedge-shaped lower cross member 2 is joined in the vehicle width direction to the lower front side of the slanted wall 1a to form a wedge-shaped closed section 3. are doing. This closed cross-section portion 3 intersects perpendicularly with the side sills of the insect body longitudinal direction strength members (not shown) on both sides of the vehicle floor, thereby increasing the strength of the front side portion of the darts lower panel 1.

! ! An extension part 5a of a floor sand member 5, which is a strength member in the longitudinal direction of the floor and which is joined to both sides of the floor panel 40 to form a closed cross section, is bonded to the lower surface of the lower cross member 2. Reference numeral 6 denotes a front side member of a strength member in the longitudinal direction of the vehicle front, which is connected to the lower side of the engine compartment side of the hood ridge panel 7 via a closing plate 8 to form a closed section.
(Front engine/rear drive) model car, the hood ledge panel 7 has a large cutout at its lower edge to avoid interference with the front drive shaft (not shown), so the front side member 6 also has a relatively large cutout. The front side member 6 is set at a high position.
The rear end of the rear end is butted against and joined to the front rising wall 1a of the lower panel 1 shown in the figure. 9 is a suspension mount member joined across the front side member 6 and the darts lower cross member 2;
The transverse link and transverse link gusset of the front suspension member (not shown) are connected and supported across the lower part of the lower cross member 2 and the lower surface of the lower cross member 2.

However, in such a conventional configuration, as mentioned above, the floor side member 5 and the front side member 6 are largely offset in the vertical direction and are discontinuous, so that the bending rigidity of the lower periphery of the darts can not be sufficiently maintained. Therefore, it is difficult to suppress the vertical movement of the engine room during idling due to this lack of rigidity.

In addition, when driving, input from the suspension is also input to the suspension mount member/< 9 k inter-L front door lower cross member 2 side, but the closed cross-section section composed of the darth lower panel 1 and the darth lower cross member 2 3 is relatively large, so lower cross member 2
The road noise from the front suspension becomes louder. Furthermore, the steering rank (not shown) is fixed to the darts lower cross member 2 via a bracket, and has the disadvantage that the vibrations of the darts lower cross member 2 directly become steering vibrations.

In view of these conventional problems, the present invention has a simple configuration that can increase the rigidity of the lower periphery of the darts, thereby reducing engine room vibration during idling.

The object of the present invention is to provide a vehicle body structure that can further improve steering imaging and sound vibration performance such as road noise.

In order to achieve the above object, in the present invention, a joint hole is formed along the back surface of the darts lower panel by penetrating through a closed section formed by joining a darts lower cross member to the lower front side of the darts lower panel. 7,9 yo... (
7J) 9 Ei2□7,2. 1. The front end of the floor side member joined to the back surface of the floor panel is continuous with the front side member whose rear end joined to the front rising wall of the darts lower panel.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, in which the same parts as those of the conventional structure are denoted by the same reference numerals.

That is, in the present invention, as shown in FIG. 2, a wedge-shaped lower cross member 2 is joined in the vehicle width direction to the lower front side of the lower front panel 1, straddling the slanted wall 1a thereof. It has a structure in which the rear end of the front side member 6 is butted against and joined to the front rising wall 1b of the darts lower panel 1, and the closed cross section 3 is formed in the longitudinal direction of the vehicle body. A joint member 1O is penetrated and joined along the back surface of the darts lower panel 1, and the front side member 6 and the floor side member 5 joined to the lower surface of the floor panel 4 are integrally connected by this joint member 1O. .

Like the floor side member 5, the joint member 10 has a channel-shaped cross section, and forms a closed cross section with the darts lower panel 1, and has both ends connected to the corresponding front side member 6 and floor side member 5, respectively.
It fits inside and joins.

A notch 2a for inserting the joint member 10 is formed in the front wall of the darts lower cross member 2.
The peripheral wall of the joint member 10 is joined to the flange edge of the joint member 10. Further, the lower wall of the needlework lower cross member 2 is formed with four parts 2b for receiving the joint member 10.
The joint member 10 is fitted into this recess 2b and joined.

Further, on the upper surface of the lower wall of the darts lower cross member 2, a reinforcement 11 having a channel-shaped cross section is joined across the joint members 10 on both sides. The closed cross sections composed of are connected in an orthogonal state.

According to the above embodiment structure, the front side member 6 of the vehicle body longitudinal direction strength member on the lower side of the hood ledge panel 7;
The closed section structure of the floor side member 5, which is a strength member in the longitudinal direction of the vehicle body on the lower surface of the floor panel 4, is passed through the closed section section 3 at the lower front side of the darts lower panel 1 to form a closed section with the darts lower panel 1. The connected joint member lO communicates as one.

Since it is connected, the bending rigidity and torsional rigidity around the darts lower are increased, and the joint members 1 on both sides are
0 is connected to the upper surface of the lower wall of the Daroshu lower cross member 2 by the reinforcement 11 that forms a closed cross section, the rigidity around the Daroshu lower is further increased, and as a result, steering vibration and floor vibration during idling are reduced. Since the support rigidity of the front suspension can be significantly reduced, road noise from the front suspension can be suppressed to a low level, and the interior of the vehicle can be made quiet, further enhancing the sense of quality.

As described above, according to the present invention, since the front side member and the floor sign member are integrally connected to the dash lower part by the joint member, the rigidity around the dash lower can be increased and engine vibration and steering vibration can be suppressed. Or, by increasing the rigidity around the needlework lower, the sound and vibration performance around the needlework lower can be improved, giving a sense of quality.

This has a great practical effect of further increasing reliability.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing a conventional structure, and FIG. 2 is a partially cutaway perspective view showing an embodiment of the present invention. 1・■Datsch lower panel, 1aII...slanted wall, i b
---Rising wall, 211・, dash cross member 3・
...Closed section, 4...Floor panel, 5...Floor sign member, 6...Front sight member, 7...
・Food ledge panel, 10...Joint member.

Claims (1)

[Claims] (1) A darts lower cross member is joined in the vehicle width direction to the front lower part of the darts lower panel to form a closed section, and the front side is installed on the front 1711 rising wall of the darts lower panel in the vehicle longitudinal direction. In a structure in which the rear ends of the members are butted and joined, and the floor side members are joined to the lower surface of the floor panel in the longitudinal direction of the vehicle body, the members are joined along the back surface of the dash floor panel, and the closed section is joined in the longitudinal direction of the vehicle body. 1. A vehicle body structure for an automobile, characterized in that a joint member is provided which penetrates through the front side member and connects the rear end of the front side member and the front end of the floor side member joined to the lower surface of the floor panel.