JPH035184Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an improvement in a vehicle body structure in which a shock absorber forming a part of a rear wheel suspension device is disposed below the rear floor of the vehicle body.

[Technical background of the invention and its problems]

FIG. 3 shows the appearance of a vehicle body 1 of a freight transport vehicle, a so-called van type vehicle, in which a luggage compartment 2 is formed at the rear of the vehicle body 1. As shown in FIG. Further, FIG. 4 shows a schematic structure of the underfloor of the vehicle body 1, and reference numeral 3 designates side members disposed at the lower portions of both sides of the vehicle body 1. As shown in FIG. A cross member 4 is installed between these left and right side members 3, 3. Furthermore, this cross member 4 includes a pair of rear side members 5,
Each front end of 5 is fixed. A front floor panel 6 is provided on the front side of the cross member 4.
A trunk floor panel 7 is provided on the rear side. Further, 8 is a shock absorber forming a part of the rear wheel suspension device. This shock absorber 8 is provided on both left and right wheels 9, 9, respectively.

By the way, in a van-type vehicle, in order to increase the interior space of the luggage compartment 2 inside the vehicle body 1, both the left and right shock absorbers 8, 8 of the rear wheel suspension device are attached to the trunk floor panel as shown in FIG. It is often arranged in a substantially V-shape below 7.
In this case, the lower ends of both shock absorbers 8, 8 are fixed to, for example, the axle beam 10, and the upper ends are attached to both the left and right rear side members 5, while being spaced apart from the trunk floor panel 7.
The trunk floor panel 7 is fixed to a cross pipe 11 installed between the trunk floor panel 7 and the trunk floor panel 7, and is configured to prevent the impact force acting on the shock absorbers 8, 8 from being directly transmitted to the trunk floor panel 7. Further, the rear side member 5 is formed in a substantially channel shape as shown in FIGS. They are joined from below by means such as spot welding. Furthermore, insertion holes for the insertion of the cross pipe 11 are formed on both side surfaces 5b, 5b of both the left and right rear side members 5, 5, respectively. When manufacturing the vehicle body 1, the cross pipe 11 is inserted into the insertion hole of both rear side members 5, 5, and the rear side members 5, 5 and the cross pipe 11 are joined by arc welding. was.

However, in the conventional configuration described above, when joining the rear side member 5 and the cross pipe 11, arc welding is performed around the entire circumference of the cross pipe 11, so for example, the upper half of the cross pipe 11 is After arc welding the joint parts A and A between the rear side member 5 and the rear side member 5,
Lower half of cross pipe 11 and rear side member 5
When arc welding the joint parts B and B, it is necessary to invert the top and bottom of the rear side member 5 or to carry out the work with the entire vehicle body 1 lifted upward, which makes the work cumbersome. A serious problem arose.

[Purpose of invention]

The purpose of this invention is to provide a vehicle body structure that can improve the workability of joining the side members and cross pipes, and also improve the joint strength between the side members and the cross pipes. It is.

[Summary of the idea]

In this invention, an insertion hole for inserting a cross pipe is formed on the side of a side member with a substantially U-shaped cross section arranged on both sides of the vehicle body. In the vehicle body structure to which the shock absorber forming a part is connected, it is joined in advance to the cross pipe side,
A first joint portion having a substantially semicircular cross-sectional shape substantially equal to the arc shape of the cross pipe and the cross pipe being inserted into the insertion hole of the side member by spot welding to the side member side. a mounting bracket provided with a substantially L-shaped second joint portion having a cross-sectional shape substantially equal to the shape of the joint portion on the side member side; and the second joint joined to the lower surface of the side member. A bent edge portion is provided at the tip of the lower joint piece of the side member in a direction away from the lower surface of the side member.

[Example of idea]

FIGS. 1 and 2 show an embodiment of this invention. Note that the same parts in FIGS. 1 and 2 as in FIGS. 3 to 7 are given the same reference numerals, and the explanation thereof will be omitted. That is, this embodiment includes a rear side member 5 having a substantially U-shaped cross section disposed on both sides of the rear part of the vehicle body 1, and a cross pipe 1 fixed to the side surface of the rear side member 5 in a penetrating state.
1 and a mounting bracket 23 that is attached to cover the joint portion from below. This mounting bracket 23 is provided with a first joint portion 21 that is joined to the cross pipe 11 side and a second joint portion 22 that is joined to the rear side member 5 side. In this case, the first joint 21 of the mounting bracket 23 is formed in the shape of a cylindrical body divided into two in the axial direction (the cross section is approximately semicircular), and is overlapped with the outer peripheral surface of the cross pipe 11. It is joined to the cross pipe 11 by arc welding.
Also, the second joint 22 of the mounting bracket 23
is formed on one end side of the first joint portion 21 . Furthermore, a side joint piece 24 that is joined to one side surface 5b of the rear side member 5 and a lower joint piece 25 that is joined to the lower surface 5c of the rear side member 5 are formed in the second joint portion 22, respectively. This lower joint piece 25 is inserted into the cross pipe 1 in the insertion hole formed on the side surface 5b of the rear side member 5.
1 is inserted through the lower surface 5 of the rear side member 5.
It is formed at the position where it polymerizes with c. Furthermore, a bent edge 26 is formed at the tip of the lower joint piece 25 and is bent downward (in a direction away from the lower surface 5c of the rear side member 5). When inserting the cross pipe 11 into the insertion hole of the side surface 5b of the rear side member 5 with the first joint portion 21 of This prevents the insertion of the cross pipe 11 from being hindered by the abutment.

Therefore, in the case of the above structure, when joining the cross pipe 11 to the rear side members 5, 5, first attach the mounting bracket 2 to the cross pipe 11.
The first joint portions 21 of No. 3 are joined by arc welding. Then, with the first joint 21 of the mounting bracket 23 connected to the cross pipe 11, both ends of the cross pipe 11 are inserted into the insertion holes in the side surface 5b of the rear side member 5, and in this state, the upper part of the cross pipe 11 is inserted. The joint parts A and A between the half parts and the rear side member 5 are arc welded, and the second joint part 22 of the mounting bracket 23 is joined to the rear side member 5 by spot welding. In this way, the second joint 22 of the mounting bracket 23
Since the joint between the cross pipe 11 and the side member 5 is performed by spot welding, the joint parts B and B (shown in FIG. 7) between the lower half of the cross pipe 11 and the rear side member 5 are arc welded. There is no need to invert the top and bottom of the rear side member 5 or to carry out the welding work with the entire vehicle body 1 lifted upward, unlike when the rear side member 5 is welded. can be improved. Furthermore, a side joint piece 24 and a lower joint piece 25 are formed on the second joint part 22 of the mounting bracket 23, respectively, and these joint pieces 24, 25 connect to one side surface 5b and bottom surface 5c of the rear side member 5. Since the cross pipe 11 and the rear side member 5 are spot welded, the strength of the joint between the cross pipe 11 and the rear side member 5 can be increased compared to the conventional method.
Furthermore, the joint strength between the cross pipe 11 and the rear side member 5 can be adjusted as appropriate by adjusting the number of spot welding points. Also,
Since the first joint 21 of the mounting bracket 23 is formed into a semicircular cross-sectional shape that is approximately equal to the arc shape of the cross pipe 11, the directionality of the cross pipe 11 can be adjusted when installing the cylindrical cross pipe 11. There is no need to consider it, and it can be fixed easily. Further, a bent edge portion 26 is provided at the tip of the lower joint piece 25 of the second joint portion 22 joined to the lower surface of the rear side member 5 in a direction away from the lower surface 5c of the side member 5. Therefore, with the first joint 21 of the mounting bracket 23 and the cross pipe 11 connected, insert the cross pipe 11 into the insertion hole of the rear side member 5, and at the same time insert the first joint 21 of the mounting bracket 23 into the side During the work of joining the member 5, the work of moving the side member 5 together with the cross pipe 11 can be easily performed, and the workability of assembling the vehicle body 1 can be further improved.

It should be noted that this invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of this invention.

[Effect of idea]

According to this invention, an insertion hole for inserting a cross pipe is formed on the side of a side member with a substantially U-shaped cross section arranged on both sides of the vehicle body, and the cross pipe inserted into this insertion hole is inserted into the suspension of the vehicle body. In a vehicle body structure in which a shock absorber forming a part of a shock absorber is connected, a first joint part is joined in advance to the cross pipe side and has a substantially semicircular cross-sectional shape substantially equal to the arc shape of the cross pipe; The cross pipe is inserted into the insertion hole of the side member and joined to the side member by spot welding, and has a substantially L-shaped cross-sectional shape that is approximately equal to the shape of the joint portion on the side member. a mounting bracket having a second joint part, and a lower joint piece of the second joint part joined to the lower surface of the side member is bent in a direction away from the lower surface of the side member. Since the bent edge portion is provided, it is possible to improve the workability of joining the side member and the cross pipe, and it is also possible to improve the joint strength between the side member and the cross pipe.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of this invention, with Figure 1 being a longitudinal sectional view showing the joint between the cross pipe and the rear side member, and Figure 2 showing the cross pipe and mounting bracket. Perspective view, 3rd
The figure is a perspective view showing the exterior of the vehicle body, FIG. 4 is a plan view showing the schematic structure of the lower part of the vehicle body, and FIG. 5 is a longitudinal sectional view of the same.
FIG. 6 is a perspective view showing how a conventional cross pipe is installed, and FIG. 7 is a longitudinal sectional view thereof. 1...Vehicle body, 5...Rear side member, 8...
Shock absorber, 11...Cross pipe, 2
1...First joint part, 22...Second joint part, 2
3...Mounting bracket, 25...Lower joint piece,
26...Folded edge.

Claims (1)

[Scope of utility model registration request] An insertion hole for inserting a cross pipe is formed on the side of the side member with a substantially U-shaped cross section arranged on both sides of the vehicle body, and a part of the suspension device of the vehicle body is inserted into the cross pipe inserted through this insertion hole. In the vehicle body structure in which the shock absorbers are connected,
A first joint portion that is joined to the cross pipe side in advance and has a substantially semicircular cross-sectional shape that is approximately equal to the arc shape of the cross pipe, and the cross pipe is inserted into the insertion hole of the side member. It is joined to the side member side by spot welding,
a mounting bracket having a substantially L-shaped second joint portion whose cross-sectional shape is substantially equal to the shape of the joint portion on the side member side; and a lower portion of the second joint portion that is joined to the lower surface of the side member. A vehicle body structure characterized in that a bent edge portion is provided at the tip of the joint piece in a direction away from the lower surface of the side member.