JPH0316883A - Suspension rod mounting structure for automobile - Google Patents

Abstract

PURPOSE:To set a rotary shaft, disposed to a bracket, to an upper part, to cause regulation of geometry of a suspension rod, and to prevent limitation of suspension performance by a method wherein the bracket is disposed to the side of the corner part of a rear side member. CONSTITUTION:A bracket 17 is formed approximately in a U-shape in cross section, and is disposed throughout a corner part 12b in the vicinity of a side sill bent in the direction of the outside of a car from a longitudinal direction portion 12a extending along the longitudinal direction of a rear side member 12. Further, the one side part 17a of the bracket 17 is joined with the side part of a longitudinal direction portion 12a of the rear side member 12. An upper flange part 17c formed to the upper end part of the outer side part 17b is joined with a plate part 21 extended integrally with or separably from a flange 12e of the rear side member 12, and an extension part extended to the front of a vehicle from a bottom part 12d of the rear side member 12 is joined with the bottom part 12d of the rear side member 12.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a method for attaching a suspension rod to a vehicle body. This relates to improvements in the vI structure.

[Prior Art] Conventional devices of this type include, for example, those shown in FIGS. 6 to 8.
There is something like the one shown in the figure. Reference number 1 in the figure is the rear side member. Reference numeral 2 indicates a side sill, and reference numeral 3 indicates a rear wheel. An axle (not shown) of the rear wheel 3 and a rear side member 1 are connected through a radius slot 4 serving as a suspension rod extending substantially in the rearward direction of the vehicle.

Specifically, the rear side member 1
As shown in the figure, it has a roughly hat-shaped cross section, and both flanges 1a are connected to the lower surface of the floor panel 5.

And, on the bottom part 1b side of this rear side member 1,
A bracket 6 to which the front end portion 4a of the radius rod 4 is attached is joined as shown in FIG.

Specifically, this bracket 6 has a roughly U-shaped cross section, and one flange portion 6a is joined to the bottom surface portion 1b of the rear side member 1, and the lower flange portion 6b is joined to the side surface portion IC of the rear side member 1. ing.

A shaft portion 7a of a bolt 7 is inserted through the bracket 6 in the horizontal direction, and a nut 8 is screwed onto the shaft portion 7a. A collar portion 4b formed at the front end of the radius slot 4 is rotatably attached to the shaft portion 7a via a rubber pusher 9.

The other end of the radius rod 4 (not shown) is rotatably attached to the axle of the rear wheel 3, and the radius rod 4 supports the driving torque of the rear wheel 3.

In addition, as for this kind of thing, for example,
There is one as described in the No. 586 publication.

[Problem M to be Solved by the Invention] However, in such a conventional device, since the bracket 6 is disposed below the rear side member 1, as shown in FIG. front end 4
The center of rotation of a (bolt shaft 7a) must be set at a distance of 111t (a+b) from the floor panel 5 (distance a is necessary to ensure the rotation angle of the radius rod 4). Since the height of the radius rod front end portion 4a is restricted, the geometry of the radius rod 4 is restricted, and the suspension performance is restricted. Further, since the bolt shaft portion 7a to which the load from the radius rod 4 is transmitted is spaced a distance a from the rear side member bottom portion 1b (joint portion), the radius rod 4
Since a large moment acts on the joint portion of the bracket 6 due to the load input from the bracket 6, there is a problem in that the wall thickness of the bracket 6 must be increased or the number of spots must be increased.

? Means for Solving the Problems] The present invention has been made by paying attention to the problems of the conventional art, in which one end of the suspension rod is rotatably attached to the axle side of the rear wheel. In a suspension rod mounting structure for an automobile, the end portion of which is rotatably attached to a bracket attached to a rear side member having a hat-shaped cross section and arranged substantially along the longitudinal direction of the vehicle, the bracket has a cross section of approximately The bracket is shaped like a letter and is disposed from a front-rear portion along the front-rear direction of the side member to a corner near a side sill that bends toward the outside of the vehicle, and one side surface of the bracket is attached to a side surface of the front-rear portion. An upper flange portion formed on the upper end of the other side member is joined to a plate portion extending integrally or separately from the flange portion of the side member, and further formed on the bottom portion of the side member. The present invention is characterized in that the suspension rod attachment structure for an automobile is such that an extension portion extending from the front side of the vehicle toward the front of the vehicle is joined to the bottom portion of the side member.

[Function] According to this means, by disposing the bracket on the side of the corner portion of the rear side member, the rotation axis disposed on the bracket can be set higher than before, Unlike in the past, the geometry of the suspension rod is not restricted, and suspension performance is not restricted.

In addition, by forming a closed cross-sectional structure with the bracket, side member, and plate part, and by joining the extensions of the bottom part of the bracket to the bottom part of the side member, the joint strength of the bracket is improved compared to before. This improves the support strength of the suspension rod.

Furthermore, since this bracket is disposed at a corner portion (highly rigid portion) of the rear side member near the side sill, road noise etc. from the suspension rod can be effectively suppressed.

[Example] Hereinafter, this invention will be explained based on examples.

1 to 4 are diagrams showing a first embodiment of the present invention.

First, Ili! To explain the concept, in Fig. 2, reference numeral 11 is the rear wheel, reference numeral 12 is the rear side member, and reference numeral 16 is the side sill. They are connected by a radius slot 14.

Specifically, as shown in FIG. 3, this rear side member 12 has a hat-shaped cross section, both flanges 12e are joined to the lower surface side of the floor panel 15, and a longitudinal portion 12a along the longitudinal direction of the vehicle is joined to the lower surface side of the floor panel 15. A corner portion 12b that is bent toward the outside of the vehicle is joined to a side sill 6 disposed on the side of the vehicle body along the longitudinal direction of the vehicle.

As shown in FIG. 3, this side sill 16 is composed of a sill outer 16a and a sill inner 16b.

On the other hand, a bracket 17 that rotatably supports one end portion 14a of the radius rod 14 is disposed at the corner portion 12b of the rear side member 12.

As shown in FIG. 3, this bracket 17 has a roughly U-shaped cross section, and one side surface 17a (inside the vehicle) is connected to the side surface 17a of the vehicle longitudinal direction portion 12a of the rear side member 12.
2c. Further, the upper flange portion 17c of the other side surface portion 17b of this bracket 17 is joined to the lower surface portion of the floor panel 15, and the vertical flange portion 17 formed on the vehicle front end side of the other side surface portion 17b is joined to the lower surface portion of the floor panel 15.
d is joined to the side surface portion 12c of the corner portion 12b of the rear side member 12. Furthermore, the bottom surface portion 17e of this bracket 17 is curved, and an extension portion 17f formed on the front end side extends from the bottom surface portion 12d of the rear side member 12.
is joined to.

Both side surfaces 17a and 17b of this bracket 17
An insertion hole 17g is formed in the pair of insertion holes 17g.
The shaft portion 18a of the bolt 18 is pushed through g, and the shaft portion 18a of the bolt 18 is screwed into the nut 19. Then, on the shaft portion 18a of this bolt 18, a lasier rod 1 is attached.
A collar part 14a provided at the front end of the collar 4 is rotatably attached via a rubber pusher 20.

Furthermore, this bracket 17 and the rear side member 1
2 and the floor panel 15, an anchor plate 21 is interposed between the upper flange portion 17c of the bracket 17 and the flange portion 12e of the rear side member l2, as mainly shown in FIG. are connected. In this embodiment, the anchor plate 21 constitutes a plate section extending separately from the flange section 12e of the rear side member 12. This results in
The bracket 17, rear side member 12, and anchor plate 21 form a closed cross-sectional structure.

A weld nut 22 is fixed to the anchor plate 21, and a seat belt anchor 23 is fixed to the upper surface of the floor panel 15 by screwing a bolt 24 into the weld nut 22.

According to this configuration, by disposing the bracket 17 on the side of the rear side member 12, the radius rod 1
While maintaining the concave movement angle of 4, the axis B 1 of the bolt 18
8. Move position a (radius slot 14 connection position) to the fourth position.
As shown in the figure, it is now possible to set it higher than before. Therefore, since the degree of freedom in the setting position of the shaft portion 18a is increased, the geometry of the radius rod 14 is not restricted as in the conventional case, and suspension performance is improved.

Further, the bracket 17 is arranged on the side of the corner portion 12b instead of below the rear side member 12 as in the conventional case.
One side surface 17a is connected to the side surface 1 of the rear side member 12.
2c, the other side 17b is attached to the floor panel 15, and the extension 17f is attached to the bottom 12d of the rear side member 12.
Since the bracket 17 is connected to the
strength has been improved. Moreover, as shown in Figure 3,
Since the box cross section is shaped by the bracket 17, rear side member 12, and anchor plate 21,
The joint strength of the bracket 17 can be improved, and the strength of the seat belt anchor 23 itself can also be improved. Moreover, since the anchor plate 10-21 is also fastened to the floor panel 15 with bolts 24, the strength of the connection with the floor panel 15 around the bracket 17 is improved, and the sound vibration properties rjL are also improved.

Moreover, since the position of the shaft portion 18a of the bolt 18 can be set near the bottom surface portion 12d of the rear side member 12, the position where the load acts can be set on the rear side member 12.
Since the moment acting on the joining position of the bracket 17 can be made smaller than before due to the input from the radius rod 14, the plate thickness of the bracket 17 can be made thinner, and the number of spots can be reduced. It is also possible to reduce the amount.

Furthermore, since the extension part 17f of the bracket 17 is joined to the bottom part 12d of the rear side member 12, the strength against lateral loads is also improved.

Furthermore, since the welded surfaces of the bracket 17 and the rear side member 12 receive input from the radius rod 14 in the longitudinal direction by shearing rather than peeling, there is no need to increase the number of spot points. The plate thickness of the bracket 17 can be reduced, and weight reduction can be achieved.

Furthermore, the rear side member 1 near the side sill 16
Since the bracket 17 is arranged at the corner part 12b of 2, that is, the part where the strength is extremely high, vibrations input from the radius rod 14 are suppressed, vibrations such as road noise are suppressed, and sound and vibration performance is improved. will be improved. Moreover, the corner portion 12 of the rear side member 12 is important for protecting the gasoline tank (not shown) in the event of a rear-end collision of the vehicle.
b can be effectively reinforced by arranging the bracket 17.

Further, FIG. 5 shows a second embodiment of the present invention.

In this embodiment, instead of the anchor plate 21 of the first embodiment, the flange portion 12e of the rear side member 12 is integrally extended to form an extended portion 12f as a plate portion. The upper flange portion 17c of the bracket 17 is joined to the upper flange portion 17c of the bracket 17 to form a closed cross section as in the first embodiment.

Even in this case, the mounting strength of the bracket 17 can be ensured.

[Effects of the Invention] As explained above, according to the present invention, it is possible to set the position of the rotation axis higher than before.
The geometry of the suspension rod is not restricted as in the past, and suspension performance can be improved. Furthermore, since the rigidity of the bracket can be improved, input from the suspension rod can be suppressed favorably. Moreover, this bracket
Since it is disposed at the corner part (highly rigid part) of the rear side member near the side sill, it has a practically beneficial effect of suppressing road noise etc. from the suspension rod.

[Brief explanation of drawings]

1 to 4 are views showing a first embodiment of the suspension rod mounting structure for an automobile according to the present invention. FIG. 1 is a perspective view showing the main parts of the structure, and FIG. 2 is a horizontal view of the structure. 3 is a sectional view taken along the line III--III in FIG. 2, FIG. 4 is an explanatory diagram showing the operation of the same structure, and FIG.
The figure is a sectional view showing a second embodiment of the present invention, and FIGS. 6 to 8 are views showing conventional examples. FIG. 6 is a sectional view corresponding to FIG. 2, and FIG. 7 is a sectional view corresponding to FIG. The corresponding perspective view, FIG. 8, is a sectional view taken along line 1-1 in FIG. 6. 11... Rear wheel 12... Rear side member 12a... Anteroposterior part 12b... Corner part 12c... Side part 12d... Bottom part 12e... Flange part 12f... Extension Part (plate part) 14...Radius rod (suspension rod) 1
5...Floor panel 16...Side sill 17...Bracket 13-114-17a...One side part 17b...Other side part 17c...Upper flange part 17e...Bottom part 17f ... Extension part 21 ... Anchor plate (plate part)

Claims (1)

[Claims] One end of a suspension rod is rotatably attached to the axle side of the rear wheel, and the other end of the suspension rod is rotatably attached to a bracket attached to a rear side member with a hat-shaped cross section, so that the suspension rod extends approximately from the front to the rear of the vehicle. In the automobile suspension rod mounting structure arranged along the direction, the bracket has a roughly U-shaped cross section, and is bent toward the outside of the vehicle from a front-rear portion along the front-rear direction of the side member near the side sill. The bracket is disposed over a corner portion, one side surface of the bracket is joined to the side surface of the front-rear portion, and an upper flange formed at the upper end of the other side surface is connected to the flange of the side member. An automobile characterized in that the extension part is joined to the plate part extended integrally or separately, and further, the extension part extended from the bottom part of the side member toward the front of the vehicle is joined to the bottom part of the side member. Suspension rod mounting structure.