JP3449152B2 - Automobile muffler hanger 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 muffler hanger structure used in a four-wheeled vehicle or the like.

[0002]

2. Description of the Related Art An example of a conventional muffler hanger structure for an automobile is shown in FIG. In FIG. 7, a muffler hanger 2 is fixed to the rear side member 1 by spot welding. The muffler hanger 2 includes a fixing plate 3 spot-welded to the rear side member 1, a plate-shaped muffler holding plate 4 connected to the fixing plate 3 with a step, and ends of the fixing plate 3 and the muffler holding plate 4. It is roughly composed of a flange 5 provided on the side. And
The muffler hanger 2 holds a muffler (not shown) via a mounting member 7 (see FIG. 2) or the like using a mounting means such as a nut 6 on the muffler holding plate 4. In this case, the number of spot welding points of the rear side member 1 and the muffler hanger 2 to the fixing plate 3 is 6 as shown in FIG.

[0003]

In the prior art shown in FIG. 7 described above, the muffler hanger 2 has a substantially U-shaped cross section by providing the plate-shaped fixing plate 3 and the muffler holding plate 4 with the flanges 5. However, great rigidity was not obtained. Further, according to this conventional technique, the plate-shaped fixing plate 3 is superposed on the rear side member 1, and spot welding is performed only on the superposed portion, and the welded portions are arranged on the same plane. Therefore, the muffler hanger for the rear side member 1 is arranged. There was a certain limit to the fixing strength of No. 2.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a muffler hanger structure for an automobile which can improve the rigidity of the muffler hanger and can increase the fixing strength of the muffler hanger.

[0005]

According to another aspect of the present invention, there is provided a muffler hanger structure for an automobile according to claim 1, wherein a rear side member having a flange and a substantially U-shaped cross section, and an opening side of an upper portion of the rear side member having a substantially U-shaped cross section. The muffler hanger includes a rear floor that is arranged so as to be closed and forms a closed cross section together with the rear side member, and a muffler hanger that holds a muffler. The muffler hanger includes a hanger body having a substantially U-shaped cross section and an upper end side of a side wall of the hanger body. a main flange protruding outward so as to be orthogonal to the hanger body, is formed so as to be perpendicular to the hanger body to one side of the hanger body sidewall of the rear side member
Consisting of a sub-flange facing the outside of the part ,
The auxiliary flange is welded to a side wall portion of the rear side member, and the main flange is welded to a flange of the rear side member and the rear floor that is overlapped with the flange.

According to a second aspect of the present invention, in the structure according to the first aspect, the hanger body is provided with respect to the one end side.
The other end should be away from the rear side member.
As it is bent downward, the hanger body
Corresponding to the curvature, the two main flanges are also curved,
A muffler holding portion is provided on the other end side of the hanger body .

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A muffler hanger structure for an automobile according to an embodiment of the present invention will be described below with reference to FIGS. It should be noted that the illustration and description of the members and parts equivalent to those shown in FIG. 7 are omitted as appropriate. Figure 1
2, the rear side member 1 has a substantially U-shaped cross section, and a flange (hereinafter, referred to as rear side member flange) 1c is formed on the upper end side of the side wall portion 1a on one side.

One end side of the rear floor 8 is arranged on the opening side of the rear side member 1 and forms a closed cross section together with the rear side member 1. The rear floor 8 is
By forming the above-mentioned closed cross section, as shown in FIG.
The opening side of the upper part of the rear side
It is arranged to close. The end portion of the rear wheel housing 9 is inserted between one end portion of the rear floor 8 and the side wall portion 1b on the other side of the rear side member 1, and these three members (the rear floor 8, the rear side member 1, and the rear wheel housing 9) are welded together. It is fixed by a fixing means (not shown) such as.

A muffler hanger 2 is fixed to the rear side member 1 and the rear floor 8 as described later. The muffler hanger 2 includes a hanger body 10 having a substantially U-shaped cross section, and a side wall 10 a of the hanger body 10.
In the upper end side as perpendicular to the hanger body 10
As shown in FIG. 1, the outer side (the cross section of the hanger body 10 is omitted)
A main flange 11 formed so as to project outward toward the U-shaped inner part, and one end side 10b of the hanger body 10.
In general, the hanger body 10 and the sub-flange 12 formed so as to be orthogonal to the hanger body 10 are generally configured.

The sub flanges 12 and 12 face the side wall portion 1a of the rear side member 1 as shown in FIG.
And fixed by spot welding at two upper and lower spots, and both main flanges 11 and 11 are spot welded at one spot to the rear side member flange 1c and the rear floor 8 where the rear side member flange 1c overlaps. It is fixed. Hanger body 10
As shown in FIGS. 1 and 2, for one end side 10b of the
The other end side 10c is separated from the rear side member 1.
The two main flanges 11 and 11 are also curved correspondingly. A mounting member 7 made of an elastic material is attached to the other end portion (muffler holding portion) of the bottom plate 10d of the hanger body 10 with a bolt 13 and a nut 6.
As shown in FIGS. 3 and 4, side walls 10a, 1 are provided on one end side and a curved portion of the bottom plate 10d of the hanger body 10.
The bead 14 is formed so as to project in the portion between 0a, thereby increasing the strength of the bottom plate 10d.

As shown in FIGS. 5 and 6, the mounting member 7 has a substantially ring-shaped mounting body 15 and a boss portion 1 formed so as to face the mounting body 15.
6 and a hole 17 formed in the boss portion 16 in general. Then, the mounting member 7 is fixed to the muffler hanger 2 by inserting the bolt 13 into the hole 17 of the one boss portion 16. Further, a shaft-shaped muffler bracket 18 provided on a muffler (not shown) is inserted into the hole 17 of the other boss portion 16 of the mounting member 7, and the muffler is supported by the muffler hanger 2 via the mounting member 7.

In the muffler hanger structure for an automobile constructed as described above, the main flange 11 is formed to project from the side wall 10a of the hanger body 10 having a substantially U-shaped cross section so as to be orthogonal to the hanger body 10, and Since the muffler hanger 2 is configured by forming the sub-flange 12 on the one end side 10b so as to be orthogonal to the hanger body 10, the muffler hanger 2 has great rigidity.

The auxiliary flange 1 of the muffler hanger 2
2 is spot-welded to the side wall portion 1a of the rear side member 1, and the main flange 11 is spot-welded to the rear side member flange 1c and the portion of the rear floor 8 where the rear side member flange 1c overlaps. Therefore, the muffler hanger 2 is Not only the side wall portion 1a of the rear side member 1 but also a portion orthogonal to the side wall portion 1a (the rear side member flange 1c and the rear floor 8).
Will also be adhered to, and will have a large adhesion strength. For this reason, it becomes possible to reliably endure the vibration of the muffler accompanying the operation of the engine.

The rear floor 8 is arranged on the opening side of the rear side member 1 having a substantially U-shaped cross section, and the rear side member 1
Since the closed cross section is formed by the rear floor 8 and the rear floor 8, this muffler hanger structure has a large rigidity.

Further, the other end side of the muffler hanger 2 is curved with respect to the one end side, and the bottom plate 10d of the hanger body 10 is
Since the mounting member 7 is attached to the other end side of the rear side member 1, the mounting portion of the mounting member 7 can be separated from the rear side member 1 as compared with the conventional muffler hanger 2 (shown by a dotted line in FIG. 2). At the same time, by adjusting the bending position of the muffler hanger 2, the arrangement position of the mounting member 7 is changed and the degree of freedom in setting the arrangement position of the mounting member 7 is increased.

[0016]

The muffler according to claim 1 or 2 of the present application
The invention relating to a hanger structure is such that a muffler hanger is provided on an upper end side of a side wall of a hanger body having a substantially U-shaped cross section.
A main flap that is formed to project outward so that it is orthogonal to the main body.
The lunge and the hanger body on one end side of the hanger body
The side of the rear side member is formed so as to be orthogonal to
The muffler hanger itself has a large rigidity because it is composed of the sub-flange arranged to face the outside of the wall portion .

The auxiliary flange on one end side of the hanger body is welded to the side wall portion of the rear side member, and the main flange of the side wall of the hanger body is welded to the rear side member flange and the rear floor portion where the rear side member flange overlaps. Therefore, the muffler hanger is fixed not only to the side wall portion of the rear side member but also to the portions (rear side member flange and rear floor) orthogonal to the side wall portion, and has a large fixing strength . For this reason,
Jar will be able to withstand the certainty with respect to the vibration of the muffler.

The upper part of the rear side member having a substantially U-shaped cross section
Since the rear floor is arranged so as to close the opening side of and the closed cross section is formed by the rear side member and the rear floor, the rigidity can be improved accordingly.

In the muffler hanger structure according to claim 2,
According to the invention, since the other end side of the muffler hanger is curved with respect to the one end side and the other end side is used as the muffler holding portion ,
Provide a flange on the flat plate so that it has a U-shaped cross section
Compared to the configured muffler hanger of the prior art, the muffler
-The holding part can be separated from the rear side member
As well as the function, the bending position on the muffler hanger
By adjusting the muffler mounting member (for example,
The layout position of the mounting member is changed, and the degree of freedom in setting the layout position of the mounting member is increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing a muffler hanger structure for an automobile according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the same muffler hanger structure.

FIG. 3 is a side view showing the muffler hanger of FIG.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

5 is a plan view showing the mounting member of FIG. 2. FIG.

FIG. 6 is a side view showing the mounting member.

FIG. 7 is a perspective view showing an example of a conventional automobile muffler hanger structure.

[Explanation of symbols]

1 Rear side member 1a Side wall 1c Rear side member flange 2 muffler hanger 8 rear floor 10 Hanger body 11 Main flange 12 Sub flange

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) F01N 7/00 B60K 13/04 F01N 1/00

Claims (2)

(57) [Claims] 1. A and the rear side member of the approximately C-shaped cross section having a flange, the rear side member of the approximately C-shaped cross section
A rear floor that is disposed so as to close the opening side of the upper part of the rear side member and forms a closed cross section with the rear side member; and a muffler hanger that holds the muffler. The muffler hanger includes a hanger body having a substantially U-shaped cross section, and the hanger body. A main flange formed on the upper end side of the side wall of the rear side member so as to project outward so as to be orthogonal to the hanger body, and a side wall of the rear side member formed at one end side of the hanger body so as to be orthogonal to the hanger body. Department
And a sub-flange arranged to face the outside of the sub-flange, the sub-flange being welded to the side wall portion of the rear side member, and the main flange being on the flange of the rear side member and the rear floor superposed on the flange. A muffler hanger structure for automobiles that is welded. 2. The hanger body is attached to the one end side.
And the other end side is separated from the rear side member.
As it becomes curved downward, the hanger body
Corresponding to the curvature of the two main flanges are also curved
The muffler hanger structure for an automobile according to claim 1 , wherein a muffler holding portion is provided on the other end side of the hanger body .