JP2526165Y2 - Body frame structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a frame structure of a vehicle body in which side frames arranged on both sides of an automobile are bridged by cross members.

(Prior Art) Conventionally, as a frame of this kind of body, for example,
As shown in FIG. 4, a front side frame 2 is continuously provided at a front end of a center side frame 1 arranged along the width of the vehicle body, and a rear side frame 3 is continuously provided at a rear end thereof. There is something.
Although each of the side frames 1 to 3 in this structure is generally formed by integrally molding a long steel material having a strong rigid cross section using a large-capacity press machine,
In recent years, as the shape of a vehicle has become more complicated, it has become more and more common to divide and mold into several parts in consideration of stripping and pressability. That is, as shown in FIG. 14, each side frame aligns an inner member 5a having a U-shaped cross section with an outer member 5b having a U-shaped cross section formed so as to sandwich an opening of the inner member 5a. It is a hollow body having a rectangular cross section and the joint is fixed by welding or the like.

The cross member 4 has a different shape depending on its mounting position. For example, the first cross member 4a at the front of the vehicle has a rectangular cross section, and is an important member for mounting a front suspension, an engine mount, etc. Is a crank pulley, an oil pan, a stabilizer in front of it, and a lower surface has a complicated shape due to the relationship with the ground height. The next second cross member 4b is penetrated through two holes 5c aligned with the side of the center side frame 1 formed in a round pipe shape. The third cross member 4c has a round pipe shape in cross section, and is mounted with an axle case, a propeller shaft, a rear spring, a rear shock absorber, and the like. The fourth cross member 4d has a U-shape at the rearmost member.
Is connected to the rear end. Further, a round pipe-shaped cross member 4e is also connected to the front end of the front side frame 2, which is also attached as shown in FIG. The hole 5c formed in the inner member 5a penetrating the cross member 4 having a round pipe shape is subjected to burring.

The rear side frame 3 has an upwardly curved shape, the rear portion is located at a position higher than the center side frame 1, and the front side frame 2 has a similarly upwardly curved front side. The height of the vehicle is lowered by lowering the floor with respect to the mounting position of the wheels by lowering the height with respect to the ground, thereby lowering the position of the center of gravity. The seat is installed inside the center side frame 1 so that an impact from the outside is not transmitted directly.

In addition, since styling changes and model changes are relatively easy with this frame structure, in the case of a model whose body length is slightly larger, the cross member 4e welded to the front end of the front side frame 2 is not formed into a round pipe but is pressed. It is manufactured into a rectangular tube shape by molding to facilitate assembly, and is used as a support member such as a bumper.

(Problem to be Solved by the Invention) However, when the above-described rectangular tubular cross member is used, if the conventional front side frame 2 is used as it is, the conventional front side frame 2 is provided on the side of the front side frame 2. Since the hole 5c for the round pipe-shaped cross member remains open, the rigidity of the outer member 5b side (wheel housing side) is weak, and muddy water may enter the center side frame 1 from there.

An object of the present invention is to provide a frame structure of a vehicle body that has increased rigidity while maintaining its durability as a structure that blocks unnecessary holes even when a conventional front side frame is used. .

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a rectangular hollow body formed by connecting both edge surfaces of an inner member having a U-shaped cross section and an outer member having a U-shaped cross section. A hat-shaped cap to be inserted into a hole formed in the side surface of the outer member of the side frame is formed by drawing, and a flange is provided on a lower peripheral edge, and the cap is projected from the hole. In addition, the flange is engaged with the edge of the hole and welded, and a screw portion is formed on the upper surface of the cap.

(Operation) The present invention adopts the above-described configuration, and the hole 15a formed in the outer member constituting the side frame (the front side frame 15) is formed into a rigid cap 20 formed by drawing to have a rectangular shape. By projecting outward from the inside of the hollow body and welding the flange 20a to the inner wall, rigidity is increased and muddy water or the like is prevented from entering the inside of the side frame. In addition, a peripheral member (in this case, a bumper styler) is attached to the screw portion 23 on the upper surface of the cap 20. Therefore, in the conventional side frame, even if the outer member has the hole 15a, it can be used simply by welding the cap 20, and the hole 18a of the inner member 18 formed opposite to the hole 15a is formed by the cross member 17. Can be closed.

(Example) Next, the Example of this invention is described based on an accompanying drawing.

FIGS. 10 to 12 show a vehicle body frame 6 according to the present invention and a vehicle 7 assembled thereby.
The bumper portion 8 of the vehicle 7 has a structure attached to the vehicle body frame 6 and has a slightly longer overall length. The vehicle body frame 6 is formed in a ladder shape as shown in FIG. 10 and includes side frames on both sides along the vehicle body and cross members connecting the side frames, and a round pipe shape is provided at an intermediate portion of the center side frame 9. A cross member 10 is provided laterally, a rear side frame 11 is continuously provided at a rear end of the center side frame 9, and a front end thereof is bent upward and rearward, and a rear axle case (not shown) is provided by a cross member 12 provided laterally at this position. And a suspension (not shown) for supporting driving wheels via a bracket 13a. The rear end of the rear side frame 11 is connected by a U-shaped cross member 14 having brackets 13 on both sides.
A bracket 13 for fixing the body is attached to the front part of the center side frame 9 and the front end is a front side frame.
One end of 15 (see FIGS. 3 and 4) is connected in series. As shown in FIG. 1, the cross member 16 laterally provided at this connection point is a rectangular member having a flange on the lower surface, and has a concave shape in which the central portion is lowered in parallel. Cross member
16 attaches a front suspension, an emagine mount, etc., and further installs a crank pulley and an oil pan above and behind it, and a stabilizer in the front. Reference numeral 13b is a bracket for supporting the attachment. A bracket 13 is attached to the front end of the front side frame 15 and a cross mamba 17 formed by pressing steel is welded to the front ends of both front side frames 15, and the cross member 17 is a side frame shown in the prior art. It may be one obtained by combining and welding steel materials of various shapes using means for forming.

The front side frame 15 and its peripheral members will be described with reference to FIGS.

As shown in FIG. 3, the front side frame 15 has an L-shaped rear end portion, has two bent portions, and has a hole 15a at the front end.
Is formed by press-forming a steel material, and the rear end portion is formed in a shape that is well connected to the center side frame 9. In addition, the cross section of the front side frame 15 was welded by aligning both edge surfaces so that the inner member 18 having a U-shaped cross section and the outer member 19 having a U-shaped cross section slightly larger than the cross section had a closed cross section. And has a rectangular shape (see FIG. 2). Also, as shown in FIG.
Conventionally, a rectangular tubular cross member 17 obtained by the above-described press molding is welded to a position where the round pipe-shaped cross member (4e) was located. Hole 18a formed in inner member 18
Is closed by a square tubular cross member 17 and the outer member
The hole 15a formed in 19 has a flange 20a and a flat-top cap 20 (see FIGS. 5 and 6) fitted and closed from the inside. Since the cap 20 has a drawn shape, high rigidity can be obtained. The cap 20 and the outer member 19 are integrated by welding the contact edge 21 as shown in FIG. 7, and the rigidity of the front side frame 15 is also increased. Have been higher.
As shown in FIG. 8, the flange 20a of the cap 20 may be enlarged, and the contact portion 22 may be spot welded to integrate the cap 20 and the outer member 19.

As described above, the hole 15a formed in the outer member 19 of the front side frame 15 for attaching the cross member is provided.
Is flanged by inserting the cap 20 from inside
Since 20a is in contact with the edge of hole 15a, it can be easily closed without necessarily viewing the work. Further, the periphery is strengthened by closing the hole 15a. Further, since the cap 20 is fixed facing the outside, the screw portion 23 is formed also in the cap 20, and the peripheral member can be attached.

Then, as shown in FIG. 9, a bumper bracket upper 24 having a flat front surface 24a and a top surface 24b is fixed to the front end of the front side frame 15, so that the bumper member 25 has a vertical surface provided with the bumper member 25. It can be mounted via a styroa 26 and a bumper stripper 27 having a horizontal surface. In addition, the upper surface 24b of the bumper bracket upper 24 and the bumper stay upper 27 are fastened with the screw 28, the tip of the cap 20 and the bumper styroia 26 are fastened with the screw 28, and the front surface 24a of the bumper bracket upper 24 is fixed to the bumper member 25. Abuts mount 29.

(Effects of the Invention) The present invention is configured as described above.
By closing the hole formed in the side frame with a cap, muddy water is prevented from entering, and the periphery of the hole has high welding strength and high component rigidity. Then, when a cap is inserted into a hole formed in a conventional side frame in which both inner surfaces of the inner member and the outer member are joined, the rigidity is increased and a rigid structure can be obtained. And the production cost can be suppressed by combining the rectangular cross member with good workability and the conventional side frame. Also,
Since the cap is attached from the inside of the side frame and the peripheral edge of the cap is welded, the rigidity is high and the appearance is not impaired. Further, by fitting the screws of the peripheral member such as the band to the screw portion on the upper surface of the cap, the bumper or the like can be attached without adding a bracket for attaching the peripheral member, and the cost is reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a frame structure of a front portion of a vehicle body according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a portion indicated by an arrow II in FIG.
3 is a side view of the front side frame of the vehicle body frame of the embodiment, FIG. 4 is a plan view of FIG. 3, FIG. 5 is a plan view of the cap of the embodiment, and FIG. 6 is a side view of FIG. 7 and 8 are perspective views showing the state of attachment of the cap of the embodiment, FIG. 9 is a perspective view showing the assembling of the front end portion of the vehicle body frame and the bumper of the embodiment, and FIG. 10 is the vehicle body of the embodiment. FIG. 11 is a plan view of the frame, FIG. 11 is a side view of FIG. 10, FIG. 12 is a perspective view of the vehicle of the embodiment, FIG. 13 is a perspective view of a body frame of a conventional vehicle, and FIG. FIG. 4 is a sectional view of a portion indicated by an arrow XIV. 15… Front side frame 15a… Hole 20… Cap 20a… Flange

Claims (1)

(57) [Scope of request for utility model registration] An inner member having a U-shaped cross section and an outer member having a U-shaped cross section are joined to each other on both side surfaces to form a side frame of a rectangular hollow body. A hat-shaped cap to be inserted into the bored hole is formed by drawing, and a flange is provided on a lower peripheral edge.The cap is projected from the hole, and the flange is engaged with the edge of the hole and welded. A frame structure of a vehicle body, wherein a screw portion is formed on an upper surface of a cap.