JPS5996067A - Chassis structure - Google Patents

Abstract

PURPOSE:To improve the rigidity and vibrationproof performance by forming a series of closed sections over a range extending from the upper edge of a dash lower panel to a cross member. CONSTITUTION:A closed section is formed by fusing a dash lower member 11 onto the chassis front side surface of a panel 12 in the longitudinal direction, and a closed section is formed by connecting the lower sedge part of the dash lower member integrally with a dash lower cross member 14 under the panel 12. Said dash lower cross member 14 is arranged having with its upper edge part fused onto the lower part of the dash lower panel 12 in the direction of car width, forming a closed section by being formed integrally with the slope part 12a of the dash lower member 12, and a concaved part 14a for receiving the dash lower member 11 is installed at the part corresponding to the member 11 and superposed onto the member 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle body structure in a main body dash portion.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Conventional structures of vehicle body dash sections include those shown in FIGS. 1 to 3.

In other words, the darts lower member 1 is the darts lower panel 2.
They are arranged opposite to each other and form a closed cross section integrally with the darts lower panel 2, thereby improving the rigidity of the darts lower panel 2.

-Manook mountaineering 3 is the above-mentioned darts lower panel 2
The darts lower cross member 4, which is disposed in the vehicle width direction at the lower part of the vehicle, is welded to the extension line of the dash lower member 1, and forms a closed cross section integrally with the dash lower member 4 to increase its own rigidity. This prevents the steering member attached to it from deforming due to loads, etc.

However, in such a conventional vehicle body structure, the strength of the darts lower panel 2 itself is sufficient in terms of vehicle body rigidity, but as shown in Fig. 2.3, the lower end of the darts lower panel Since it is not connected to other members other than 2, such as the darts lower cross member 4, the strength from the crowd prevention surface is not sufficient, and it may cause resonance during idling or high-speed driving, etc. This may occur, causing muffled sounds. Furthermore, since there is a portion A between the lower end of the darts lower member 1 and the upper end of the dash lower cross member 4 that is not reinforced by these two members, excessive input may be applied through the steering system when driving on a highly uneven mountain road. When this happens, external stress concentrates on the core portion 5+A, causing a problem in that it causes squeaks.

The present invention has been made focusing on such problems,
It is an object of the present invention to provide a vehicle body structure that can improve the strength of the anti-corrosion surface and further improve the rigidity of the vehicle dash.

In order to achieve the above object, the present invention connects the rack mounting ring 3 to the darts lower member and forms a series of closed cross sections from the upper end of the darts lower panel 2 to the dash cross member 4. This problem has been solved, and at the same time, the strength of the dash section of the vehicle body has been improved by -1-.

The configuration of the present invention will be described in detail below according to an embodiment shown in FIG. 4.5. In the figure, reference numeral 11 denotes a darts lower member, which is vertically welded to the front side of the vehicle body in a dash lower panel 120, thereby forming a closed section, and its lower end is attached to the lower part of the darts lower panel 12, which will be described later. It forms a closed cross section integrally with the darts lower cross member that extends over a width of 10,000 times. It extends to the slope portion 12a and is joined by going around it. A joining flange is formed at the upper end, and 14 is a darts lower cross member, whose upper edge is welded to the lower part of the darts lower panel 12 in the vehicle width direction. As mentioned above, it forms a closed cross section integrally with the slope portion 12a of the darts lower panel 12, and a recess 14a is provided at the corresponding portion of the darts lower opening 11 to receive it. .

The dash lower cross member 1 is overlapped with the dash lower cross member 1, and 1 and 13 are rack mounting rings, which have a mounting N portion 13b of the steering member, and which are superposed on the dash lower cross member 1.
4, and at its upper end there is a recess 1 having approximately the same cross section as the dash lower cross member (11) and matching the recess 14a of the dash lower cross member (14).
3a is provided and overlapped with the recessed portion 14a by 2t.

Reference numerals 15 and 16 are the dash upper panel (dash upper panel that forms the cowl part extending in the direction of the military cap above the flannel, and the cowl top flannel).

In the present embodiment having the above configuration, the lower part of the lower member 11 includes the recess m14a of the lower cross member t4 overlapped with the lower part, and the recess 1 of the lower member 11.
It is continuous with the rack mounting 13 through the concave portion 13a of the rack mounting 13 which is overlapped with the 4alC.

Since the rack mounting 13 is welded to the lower cross member 14 forming a closed cross section, the lower end of the lower end of the lower end of the lower end of the lower cross member 11 is attached to the lower cross member 14 of the end of the lower end of the lower end. It is coupled to the cowl upper panel 15 and connects the upper and lower reinforcing structural members. Therefore, the rigidity of the darts lower panel 12 from its vibration surface is improved, and the generation of muffled noise due to resonance is prevented, and the parts where the darts lower member 11 is attached are thoroughly reinforced.
This also prevents the generation of squeaking noises due to the concentration of external stress.

Incidentally, if it is formed on the back surface of the needlework lower panel <11 that is easy to work with, the workability can be improved without causing any problems.

As explained above, according to the present invention, the rigidity of the insulating surface is improved, it is possible to prevent muffled noise during idling or high-speed driving, and squeak noise when driving on rough roads, and it is also possible to Even at times, the same assembly process as before (installing the darts lower menhara on the darts lower panel in advance, and then assembling the darts lower cross member and rack mounting as sub-assemblies 1) can be used to increase the number of man-hours. It never invites.

In addition, the dash lower cross member and rack mounting are superimposed on the dash lower cross member (and rack mounting). The external force that enters the mounting is transmitted to the dash lower panel through the lower panel, and the lower panel is easily impressed.Without a car, the rigidity of the upper 1 assembly part is noticeably improved.Force 1 It has many practical effects, such as being able to more reliably prevent the engine and transmission from entering the factory room in the event of a collision.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of a conventional vehicle body structure, Figure 2 is a cross-sectional view taken along the line ■-■ in Figure 1, Figure 3 is a front view showing the rear tush section of the main body, Figure 10 is An embodiment of the invention is shown below.
FIG. 1 is a sectional view corresponding to line -11, and FIG. 5 is a front view thereof. 1.11° Patash Roamennoku, z, 12...Evening. Lower panel, 3.13... Rack mounting, 4.14... Lower cross member (,15
... Datsusure panel Kunel, 16... Cowl top panel. Figure 1 Figure 2 Figure 4 Procedural amendment. . 2. Name of the invention Vehicle body structure 3. Relationship with the person making the amendment Applicant (899) Nissan Motor Co., Ltd. 4, Agent Address: 1-29 Akashi-cho, Chuo-ku, Tokyo 104 Liquid Liquid Pill No. 2.8 ，
4. Correct the figures in Figure 5 on the attached sheet. Figure 3

Claims (1)

[Claims] (1) Welded to the needlework lower panel to form a closed cross section
f) a darts lower cross member, the upper end edge of which is welded to the lower part of the darts lower panel in the vehicle width direction; In a vehicle body structure having rack mounting, the upper end edge of the lower cross member extending the lower end of the darth lower cross member is provided with a member side recess to receive it and overlapped, and further rack mounting is provided. 1. A vehicle body structure characterized in that: a mounting side recess is formed in an end portion thereof, and overlaps with the forward and backward movement of the darts lower member, so that the darts lower member and the rack mounting are substantially continuous.