JPH10212942A - Muffler hanger structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the muffler hanger structure of an automobile which can improve the rigidity of a muffler hanger and enlarge the stick strength of the muffler hanger. SOLUTION: A muffler hanger 2 is composed of a hanger main body 10 with a nearly U-shaped section, a main flange 11 formed on the side wall 10a of the hanger main body 10 and a sub-flange 12 formed on the one end side of the hanger main body 10 and the sub-flange 12 is welded to the side wall part 1a of a rear side member 1 and the main flange 11 is welded to a rear floor and a rear side member flange 1c. The rigidity of the muffler hanger 2 itself can be enlarged by providing the main flange 11 and the sub-flange 12. As the muffler hanger 2 is welded to not only the side wall part 1a but also a part orthogonally crossing to the side wall part 1a (rear side member flange 1c and rear floor), a large stick strength is obtained and it can be endured for the vibration of the muffler surely as well.

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 for a four-wheeled vehicle or the like.

[0002]

2. Description of the Related Art FIG. 7 shows an example of a conventional automobile muffler hanger structure. 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 flat 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. And a flange 5 provided on the side. And
The muffler hanger 2 is configured to hold a muffler (not shown) via a mounting member 7 (see FIG. 2) or the like using mounting means such as a nut 6 on the muffler holding plate 4. In this case, the number of spots to be spot-welded to the fixing plate 3 of the rear side member 1 and the muffler hanger 2 is six as shown in FIG.

[0003]

In the prior art shown in FIG. 7, the flange 5 is provided on the flat fixing plate 3 and the muffler holding plate 4 to make the shape of the muffler hanger 2 substantially U-shaped in cross section. However, it was not possible to obtain great rigidity. Further, in this prior art, the flat fixing plate 3 is overlapped on the rear side member 1 and only the overlapped portion is spot-welded, and the welded portion is arranged on the same surface, so that the muffler hanger for the rear side member 1 is provided. The fixing strength of No. 2 had a certain limit.

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 increase the fixing strength of the muffler hanger.

[0005]

According to the first aspect of the present invention,
A rear side member having a substantially U-shaped cross section having a flange, a rear floor disposed on the opening side of the rear side member to form a closed cross section with the rear side member, and a muffler hanger holding a muffler, wherein the muffler hanger has a substantially A U-shaped hanger main body, a main flange protruding from the upper end side of the side wall of the hanger main body so as to be orthogonal to the hanger main body, and formed at one end side of the hanger main body so as to be orthogonal to the hanger main body. A sub-flange is welded to the side wall of the rear side member, and the main flange is welded to the flange of the rear side member and the rear floor overlapped with the flange.

According to a second aspect of the present invention, in the configuration of the first aspect, the other end of the muffler hanger is curved with respect to one end, and a muffler holding portion is provided at the other end. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a muffler hanger for an automobile according to an embodiment of the present invention will be described below with reference to FIGS. Illustration and description of members and portions equivalent to those shown in FIG. 7 will be omitted as appropriate. FIG.
2 and FIG. 2, the rear side member 1 has a substantially U-shaped cross section, and a flange (hereinafter, referred to as a rear side member flange for convenience) 1c is formed at an upper end side of one side wall 1a.

[0010] One end of a rear floor 8 is arranged on the opening side of the rear side member 1, and forms a closed section together with the rear side member 1. An end of the rear wheel housing 9 is inserted between one end of the rear floor 8 and the other side wall 1b 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. And the like.

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.
A main flange 11 is formed on the upper end of the hanger main body 10 so as to be orthogonal to the hanger main body 10, and a sub-flange 12 is formed on one end 10 b of the hanger main body 10 so as to be orthogonal to the hanger main body 10. ing.

The two sub-flanges 12, 12 are fixed to the side wall 1a of the rear side member 1 by spot welding of two upper and lower points as shown in FIG. 1, and the two main flanges 11, 11 are connected to the rear side member flange. 1
c and this rear side member flange 1c is fixed to a portion of the rear floor 8 where the rear side member flange 1c overlaps by spot welding at one spot. The other end 10c is curved with respect to the one end 10b of the hanger body 10, and the two main flanges 11, 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 10 d of the hanger body 10 by bolts 13 and nuts 6. Hanger body 1
A bead 14 is formed on one end side and a curved portion of the bottom plate 10d of the bottom plate 10 so as to protrude into a portion between the side walls 10a, 10a as shown in FIGS.
The intensity of 0d is increased.

As shown in FIGS. 5 and 6, the mounting member 7 includes a substantially ring-shaped mounting body 15 and a boss 1 formed opposite to the mounting body 15.
6 and a hole 17 formed in the boss portion 16. 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. An axial muffler bracket 18 provided on a muffler (not shown) is inserted into a 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, a main flange 11 is formed to project from a side wall 10a of a hanger main body 10 having a substantially U-shaped cross section so as to be orthogonal to the hanger main body 10. Since the muffler hanger 2 is formed by forming the sub-flange 12 on one end 10b so as to be orthogonal to the hanger body 10, the muffler hanger 2 has a large rigidity.

Further, the sub-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 on which the rear side member flange 1c overlaps. Not only the side wall 1a of the rear side member 1 but also a portion orthogonal to the side wall 1a (the rear side member flange 1c and the rear floor 8).
Also, it is possible to have a large fixing strength. For this reason, it can reliably withstand the vibration of the muffler due to the operation of the engine.

A 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 floor 8 form a closed cross section, so that the muffler hanger structure has high rigidity.

Further, the other end of the muffler hanger 2 is bent with respect to the one end, so that the bottom plate 10 d of the hanger body 10 is formed.
The mounting member 7 is attached to the other end side of the vehicle, so that the portion to which the mounting member 7 is attached can be separated from the rear side member 1 as compared with the prior art 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]

According to the present invention, a main flange is formed on the side wall of a hanger body having a substantially U-shaped cross section so as to project perpendicularly to the hanger body, and a sub-flange is formed at one end of the hanger body so as to extend perpendicular to the hanger body. Since the muffler hanger is formed by forming the flange, the muffler hanger itself has high rigidity.

Further, the auxiliary flange on one end side of the hanger body is welded to the side wall 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 of the rear side member, but also to a portion (rear side member flange and rear floor) orthogonal to the side wall, thereby having a large fixing strength. It can reliably withstand the vibration of the muffler.

Since the rear floor is disposed on the opening side of the rear side member having a generally U-shaped cross section and having a flange, and the rear side member and the rear floor form a closed cross section, the rigidity can be improved accordingly.

Further, by bending the other end of the muffler hanger with respect to the one end and using the other end as a muffler holding portion, the bending position of the muffler hanger is adjusted to position the muffler holding portion with respect to the rear side member. Can be changed, and the degree of freedom in setting the arrangement position of the muffler holding portion can be increased.

[Brief description of the drawings]

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

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

FIG. 3 is a side view showing the muffler hanger of FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

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

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]

 DESCRIPTION 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 Secondary flange

Claims (2)

[Claims] 1. A muffler comprising: a rear side member having a substantially U-shaped cross section having a flange; a rear floor disposed on an opening side of the rear side member to form a closed cross section with the rear side member; and a muffler hanger holding a muffler. The hanger includes a hanger main body having a substantially U-shaped cross section, a main flange protruding from an upper end of a side wall of the hanger main body so as to be orthogonal to the hanger main body, and orthogonal to the hanger main body at one end of the hanger main body. And the secondary flange is welded to the side wall of the rear side member, and the main flange is welded to the flange of the rear side member and the rear floor overlapped with the flange. Features a muffler hanger structure for automobiles. 2. The muffler hanger structure for an automobile according to claim 1, wherein the other end of the muffler hanger is curved with respect to the one end, and a muffler holding portion is provided at the other end.