JP3814108B2 - Body cross member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cross member of a vehicle body that connects the vicinity of left and right center pillars.
[0002]
[Prior art]
In many two-seat vehicles, the inner surfaces of the left and right center pillars are connected to each other by a cross member in order to increase the torsional rigidity of the vehicle body and suppress the deformation of the passenger compartment at the time of a side collision. In general, the conventional cross member is directly coupled to the center pillar inside panel, which is a member for securing the rigidity of the side surface of the vehicle body, by welding.
[0003]
[Problems to be solved by the invention]
However, according to the above-described conventional configuration, the cross member fixed in the trunk room can be an obstacle to the mounting work of the auxiliary equipment in the trunk room in the production line or the attaching / detaching work of the auxiliary equipment during maintenance. .
[0004]
The present invention has been devised to solve such problems of the prior art, and the main purpose of the present invention is to ensure a sufficient strength and to provide an auxiliary machine during manufacturing and maintenance. It is an object of the present invention to provide a cross member of a vehicle body that is configured so as not to deteriorate the attaching / detaching workability.
[0005]
[Means for Solving the Problems]
In order to achieve such an object, in the present invention, a coupling means that allows the cross member (1) of the vehicle body to be repeatedly attached to and detached from the bracket (3) fixed to the inner surface in the vicinity of the left and right center pillars (2). Each of the ends is connected via (nut member 6 and bolt 8), and a trapezoidal portion corresponding to the bracket to be joined to an outer surface of the bracket having a trapezoidal portion whose cross-sectional shape is narrow on the upper side And the front wall (WF) is made of a hollow material having a stepped shape with its lower edge retreated, and the left and right ends of the lower wall are partially cut off so as to cover the outer surface of the bracket from above. It was supposed to be. According to this, since the cross member can be easily detached from the vehicle body as needed, it is not necessary to reduce the workability of attaching and detaching the auxiliary equipment at the time of manufacture and maintenance. The attachment / detachment workability can be improved. In addition, the cross-sectional shape of the front wall is complicated by making it stepwise, and it is intended to optimize the stress distribution when a large load is applied from the side of the vehicle body while minimizing the increase in weight. Can do.
[0006]
In particular, if the cross member is provided in a part separating the cargo compartment and the passenger compartment behind the center pillar, and the lower edge side of the stepped portion is an attachment portion of a partition that partitions the passenger compartment and the cargo compartment (Claim 2), Since the joint surface of the partition is recessed, it is not necessary to project the head of the bolt for attaching the partition. Further, if a flange extending rearward is provided on the rear wall and the flange is used as a support portion of the luggage shelf (Claim 3), the luggage shelf can be independently and repeatedly attached and detached. The cross member can have a function as a stopper for preventing an article placed on the shelf from falling into the vehicle interior.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
[0008]
The cross member 1 according to the present invention is configured such that each end thereof is coupled to a bracket 3 fixed to the inner surface of the vehicle body in the vicinity of the left and right center pillars 2 (see FIG. 1).
[0009]
As shown in FIG. 2, the bracket 3 is formed of a plate material so that the cross-sectional shape of the joint surface with the cross member 1 forms a trapezoid whose upper side is narrow. The ear plate 4 bent at the fixed end side is spot welded to be fixed to the inside panel 5 forming the side wall of the passenger compartment.
[0010]
On the other hand, the cross member 1 is formed hollow by extrusion molding, and the cross-sectional shape thereof is a trapezoid with a narrow upper side. And the lower wall of each end is partly cut away (the part of the imaginary line in FIG. 2), and the inner surface is joined to the outer surface of the bracket 3 by covering each end of the cross member 1 with the bracket 3 from above. Have been to. Thus, by making the cross-sectional shape of the joint surface of the cross member 1 with the bracket 3 a trapezoid whose upper side is narrow, workability when attaching to the bracket 3 from above is improved.
[0011]
A nut member 6 is fixed to the main part of the bracket 3 by caulking. The cross member 1 has a hole 7 at a position corresponding to the nut member 6. Each end of the cross member 1 is coupled to the bracket 3 by screwing the bolt 8 into the nut member 6 through the hole 7. That is, the cross member 1 is coupled to the bracket 3 via a coupling means that can be repeatedly attached and detached, such as a bolt / nut.
[0012]
The front wall WF of the cross member 1 is bent stepwise. By fixing a nut member similar to the above to the recessed surface 1a generated by bending, the upper edge of the partition (not shown) that separates the passenger compartment from the luggage compartment is formed on the recessed surface 1a. The partition is fixed to the cross member 1 by joining and screwing the bolt into the nut member. According to this, since the joint surface of the partition is depressed, the bolt head does not protrude.
[0013]
A flange 9 extends rearward from the lower end of the rear wall WR of the cross member 1. The flange 9 is bolted to the bracket 3 at both ends, and is also used as a support portion for a front edge of a luggage shelf (not shown) on which a load is placed. In other words, if a nut member similar to the above is fixed to the essential part of the flange 9 and the luggage shelf is bolted, the luggage shelf can be independently and repeatedly attached and detached.
[0014]
Note that the height dimension of the cross member 1 is set so as to function as a stopper for preventing an article placed on the luggage shelf from falling into the vehicle compartment.
[0015]
If the joint of the inside garnish (not shown) stretched on the inside panel 5 is matched with the end of the cross member 1, only the cross member 1 can be attached and detached without removing the inside garnish.
[0016]
In particular, in the case of a two-seat vehicle, if a large load is applied from the side of the vehicle body at the time of a collision or the like, the amount of deformation on the front side of the center pillar 2 that is the opening surface of the door becomes larger. It is thought that a large buckling stress acts. Therefore, as described above, the increase in weight is minimized by making the cross-sectional shape of the front wall WF more complicated than the rear wall WR or by making the front wall thickness larger than the rear wall WR. The stress distribution can be optimized after being suppressed.
[0017]
【The invention's effect】
As described above, according to the present invention, the cross member can be removed as necessary. Therefore, the auxiliary machine is installed in the trunk room in the production line, or the auxiliary machine is installed in the trunk room during maintenance. The cross member does not become an obstacle to the removal work. That is, according to the present invention, it is possible to provide a cross member that can ensure sufficient strength and that does not deteriorate the detachment workability of auxiliary equipment during manufacturing and maintenance.
[Brief description of the drawings]
FIG. 1 is a perspective view of a connecting portion between a cross member and a vehicle body according to the present invention. FIG. 2 is a longitudinal sectional view of a connecting portion between the cross member and a bracket.
1 Cross member 2 Center pillar 3 Bracket 6 Nut member 8 Bolt

Claims (3)

A cross member of a vehicle body, each end of which is coupled to a bracket fixed to the inner surface in the vicinity of the left and right center pillars, through repetitive coupling means ,
The bracket has a trapezoidal portion with a narrow cross section on the upper side,
The cross member has a trapezoidal portion corresponding to the bracket to be joined to the outer surface of the bracket and is made of a hollow material having a stepped shape with the front wall receding the lower edge side,
A cross member for a vehicle body, wherein the left and right ends of the lower wall are partially cut off so as to cover the outer surface of the bracket from above . 2. The partition according to claim 1 , wherein the lower edge side of the stepped portion is provided as a partition attaching portion for partitioning the vehicle compartment and the cargo compartment. The cross member of the car body described. The vehicle body cross member according to claim 2, wherein a flange extending rearward is provided on the rear wall, and the flange serves as a support portion of the luggage shelf.

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