JP2875962B2 - Vehicle body structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body structure of a vehicle, and more particularly, to a spring for supporting one end of a suspension mechanism in the longitudinal direction of a side member extending in the front-rear direction and disposed on both sides in the vehicle width direction of the vehicle. The present invention relates to a vehicle body structure to which a support body is fixed.

[0002]

2. Description of the Related Art Conventionally, as this kind of body structure, for example, one described in Japanese Utility Model Laid-Open Publication No. 64-22686 is known. As shown in FIG. 4, such a body structure fixes a lower side of a spring support body C attached to a wheel housing B to a longitudinal middle of a side member A extending in the vehicle front-rear direction. One end of a suspension mechanism (not shown) for elastically supporting the wheel is mounted via a mounting hole C1 provided on the upper side of the spring support body C.

Further, the side member A has an upper member A5 extending integrally with the member main body A1 integrally mounted on the upper side of the member main body A1. More specifically, the member main body A1 of the side member A includes a bottom wall A2.
And a pair of side walls A3, A3 standing upright from both left and right sides of the bottom wall A2 to form a rectangular cross section, and the upper member A5 is provided with a bottom wall A6, and left and right sides of the bottom wall A6. A pair of side walls A7, A7 standing upright from both sides are formed in a rectangular cross section, and such an upper member A5 is inserted into the upper opening side of the member main body A1, and the respective side walls A3, A7 are inserted. Are fixed by welding means.

Further, the spring support C is
In order to support the suspension mechanism, it is formed to be rigid with a thick plate, and a side wall A3 of one side of the member main body A1 is applied to a side surface of the spring support body C, and the both sides are fixed by welding means. ing.

[0005]

In the above body structure, when an external load is applied to the side member A from one side in the longitudinal direction, the side member A is buckled and deformed as a whole. It is desirable to perform energy absorption.

However, in the above-described conventional configuration, the side member A is fixed to the side surface of the spring support body C having high rigidity, and the member body A1 and the upper member A5 constituting the side member A are connected to each other. Each side wall A
3 and A7 are integrally connected to each other, and the mounting portion of the spring support C in the side member A is locally rigid. Therefore, when an external load is input to the side member A, It is conceivable that the side member A is in a center-folded state around the mounting portion of the spring support C, which is locally rigid, without causing the entire side member to buckle.
For this reason, the energy absorption characteristics when an external load is input cannot be said to be sufficient.

An object of the present invention is to make it possible to satisfactorily buckle and deform the side member as a whole when an external load is applied to the side member, thereby enhancing the energy absorption characteristics.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a method of manufacturing a vehicle in which one end of a suspension mechanism is provided halfway in the longitudinal direction of a side member 1 extending in the front-rear direction and disposed on both sides in the vehicle width direction of a vehicle. A body structure of a vehicle to which a spring support body 3 is attached, the side member 1 having a rectangular cross section and a rectangular cross section to be inserted into an upper portion of an opening of the member main body 11. The spring support body 3 is fixed to the side wall 13 of the member main body 11, and the bottom wall 16 and the side wall 17 of the upper member 15 are attached to the spring support body 3, respectively. The blank area 5 is spaced apart from the side wall 13 of the member body 11.
By forming 2, the fragile portion 5 is formed.

[0009]

According to the above construction, when an external load is applied to the side member 1 from one side in the longitudinal direction, even if the spring support body 3 is formed to have a high rigidity, the side member 1 can be used. In the vicinity of the attachment of the spring support body 3 in the bottom wall 1 of the upper member 15,
6 and the side wall 17 are separated from the side wall 13 of the member main body 11 to which the spring support body 3 is attached, thereby forming the blank area 52, thereby forming the fragile portion 5; 5, the rigidity of the vicinity of the attachment is weakened, so that the side member 1 can be buckled and deformed satisfactorily as a whole. Therefore, the energy when an external load is input to the side member 1 is obtained. Absorption characteristics can be enhanced. Moreover, since the fragile portion 5 is formed by forming a blank area 52 in the upper member 15 in the vicinity of the attachment of the spring support body 3, the member main body 11 and the upper member 15 are previously assembled integrally. By using the side member 1 attached at another work site, the blank area 52 is attached.
The spot welding gun G is inserted into the inside using the welding gun G, and the side wall 13 of the member main body 11 and the spring support body 3 are welded with the welding gun G, thereby fixing the support body 3 and the side member 1 together. Therefore, workability can be improved.

[0010]

FIG. 1 shows an embodiment of a body structure on the front side of a vehicle, which is basically the same as the above-mentioned conventional one, and is intermediate in the longitudinal direction of the side member 1. FIG. The lower part of the spring support body 3 attached to the wheel housing 2 is fixed to the portion.

The side member 1 includes a member main body 11 and an upper member 15. The member main body 11 includes a bottom wall 12, and a pair of left and right side walls 13 and 14 standing upright from both left and right sides thereof. The upper member 15 is formed in a rectangular cross section by a bottom wall 16 and a pair of left and right side walls 17 and 18 erected from both right and left sides of the bottom wall 16 to face each other. The upper member 15 is inserted into the upper portion of the opening of the member main body 11, and each of the side walls 1 is inserted.
A plurality of portions in the length direction of 3, 14, 17 and 18 are fixed to each other by welding means.

As shown in FIG. 2, the spring support body 3 has a flat wall 31 located on the top side of the wheel housing 2 and a downward wall extending from the wall 31 along the side wall of the wheel housing 2. An extended side wall 32,
The lower side of the side wall 32 is applied to the left side wall 13 of the member main body 11, and the both sides are fixed by welding. In addition, the spring support body 3 is used to support the suspension mechanism 4 to be described later.
The whole of 1 and 32 is formed thick and has high rigidity.

Further, a suspension mechanism 4 for elastically supporting the wheels is mounted on the spring support body 3. As the suspension mechanism 4, in the embodiment shown in FIG. A straddle-type piston rod having a piston rod 42 inserted so as to be able to be inserted and a suspension spring 43 interposed between the piston rod 42 and the piston rod 42 Is inserted through a mounting hole 30 provided in the flat wall 31 of the spring support body 3, and the insertion end is fixedly supported by a fixing tool 44.

In the above body structure, when an external load is applied to the side member 1 in the vicinity of the mounting portion of the spring support 3 in the side member 1, the side member 1 is entirely buckled. A fragile portion 5 for deforming to enhance the energy absorption characteristics is formed.

In forming the fragile portion 5, for example, as shown in the embodiments of the respective drawings, the upper member 15 is provided in the vicinity of the attachment of the spring support body 3 in the member main body 11 to face the vicinity of the attachment. In the middle part in the longitudinal direction, the bottom wall 16 and the left side wall 17 provided on the upper member 15
Is formed in an arc shape toward the right side wall 18 provided on the upper member 15 so as to be separated from the left side wall 13 of the member main body 11 to which the member 51 is attached. A blank area 52 is provided between the left side wall 13 and the left side wall 13 to which the blank area 3 is attached.
By forming 2, the rigidity of the member main body 11 is reduced, and accordingly, when an external load is applied to the side member 1, the side member 1 is entirely buckled.

In the above configuration, when an external load is applied to the side member 1 from, for example, the front side, the fragile portion 5 provided in the side member 1 in the vicinity of the mounting of the spring support body 3 is used. The side member 1 can be buckled and deformed satisfactorily in the front-rear direction as a whole, and the energy absorption characteristics can be enhanced.

Further, as described above, the fragile portion 5
In the case where the blank area 52 is formed in the upper member 15 in the vicinity of the attachment of the spring support body 3, when the side member 1 and the spring support body 3 are fixed by welding means, for example, the member main body 11 and the upper member 1
Even when using the side member 1 manufactured in another work site in which the spot welding gun 5 is integrally assembled in advance, the spot welding gun G is inserted into the inside using the blank area 52 as shown in FIG. By spot welding the side wall 13 of the member main body 11 and the side wall 32 of the spring support body 3 with the welding gun G, the support body 3 and the side member 1 can be fixed, so that workability can be improved. it can.

That is, when the blank area 52 is not provided, a welding gun is inserted from the upper opening side of the member main body 11 with the upper member 15 removed, and the side wall 13 and the spring support body 3 are removed. It is necessary to weld the upper member 15 and the member body 11 to each other, and then, when providing the blank area 52, as described above, the member body 11 and the upper member Thus, the workability of the side member 1 can be improved because the side member 1 can be used at another work site which has been assembled in advance.

Further, in the embodiments shown in the drawings, the body structure on the front side has been described, but the present invention can also be applied to the body structure on the rear side.

[0020]

As described above, according to the present invention,
When an external load is applied to the side member 1 from one side in the length direction, even if the spring support body 3 is formed to have a large rigidity, the spring support body 3 is provided in the vicinity of the mounting of the spring support body 3 on the side member 1. Since the stiffness of the side member 1 in the vicinity of the attachment can be weakened by the fragile portion 5, the side member 1 can be buckled and deformed satisfactorily as a whole. Energy absorption characteristics at the time of input can be improved. Moreover, the vulnerable part 5
Since the upper member 15 is formed by forming a blank area 52 in the vicinity of the attachment of the spring support body 3, another operation in which the member main body 11 and the upper member 15 are previously assembled integrally. The spot welding gun G is inserted into the inside using the blank area 52 by using the side member 1 manufactured on site, and the side wall 13 of the member main body 11 and the spring support body 3 are connected with the welding gun G. By welding, the support body 3 and the side member 1 can be fixed, so that workability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a body structure of a vehicle according to the present invention.

FIG. 2 is a longitudinal sectional view of a main part thereof.

FIG. 3 is a longitudinal sectional view of a main part showing a step of welding a spring support body to a side member.

FIG. 4 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 ... side member 3 ... spring support body 5 ... fragile part

Claims (1)

(57) [Claims] 1. A vehicle in which a spring support body (3) for supporting one end of a suspension mechanism is fixed in the longitudinal direction of a side member (1) disposed on both sides in the vehicle width direction of the vehicle. A body structure, wherein the side member (1) is a member main body (11) having a rectangular cross section.
And an upper member (15) having a rectangular cross section that is inserted into the upper part of the opening of the member main body (11), and a spring support body (3) is provided on a side wall (13) of the member main body (11). The upper member (1
The blank area (52) such that the bottom wall (16) and the side wall (17) of 5) are separated from the side wall (13) of the member body (11) to which the spring support body (3) is attached. ) To form a fragile portion (5).