JPS6345538Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) This invention is a muffler support structure, specifically fixed to the rear end of the muffler to suspend the muffler,
This invention relates to an improvement in the mounting structure of a bracket that prevents damage to a muffler when a vehicle is backed up.

(Prior art) As a conventional muffler support structure, for example, the first
There is something like the one shown in the figure ("Nitsusan Service Bulletin No. 440 [SAV-1]"
FX, Auster JX, Violet Liberta:
Introduction to the T11 Type Spinning Wheel (published by Nissan Motor Co., Ltd., June 1981).As shown in the figure, the tail tube 2 protrudes horizontally from the end plate 1A of the muffler 1, which is suspended horizontally below the vehicle body. , the lower end surface of the rear end side (end plate 1A side) of the muffler 1 and the longitudinally intermediate portion of the tail tube 2 are connected (welded) with a rod-shaped member 11 for preventing damage to the muffler 1 when the vehicle backs up. Furthermore, the muffler 1 is connected to the vehicle body through the tail tube 2 (rod member 11
Tube 2 on the end plate 1A side from the welded part of
) a welded first bracket 3, a second bracket 6 fixed to the first bracket 3 with bolts 4 and nuts 5, and a mount rubber 8 connecting the second bracket 6 and the vehicle body side bracket 7;
It is going by. Note that 9 and 10 are bolts and nuts that connect the mount rubber 8 and the vehicle body side bracket 7. It is combined by

However, in such a conventional muffler support structure, both ends of the inclined rod member 11 are welded to the muffler 1 and the tail tube 2, respectively, and the tail tube 2 is connected to the mount rubber 8.
Since the rod-like member 11 is suspended from the vehicle body 7 through the vehicle body 7, when the rod-shaped member 11 comes into contact with a road surface protrusion such as a curb when the vehicle is backing up, the impact load will first act directly on the tail tube 2 and the muffler 1, which are rigidly connected. However, the impact load is then absorbed by the mount rubber 8, and if the impact load is large, there is a risk that the welded portion of the rod-shaped member 11 will crack or peel or be significantly deformed.

(Purpose of the invention) Therefore, this invention solves the above problem by connecting a member having a sloped surface for preventing damage to the lower end of the muffler to the vehicle body via an elastic member and making it also serve as a muffler support bracket. It is intended to.

(Structure of the invention) The structure of this invention consists of a muffler supported substantially horizontally below the vehicle body, a tail tube protruding from the end plate of this muffler, a support bracket whose one end is fixed to the end plate, and this support bracket. and an elastic member connecting the muffler to the vehicle body, the support bracket having an inclined surface extending rearward and upward from the lower end side of the end plate.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

FIG. 2 shows an embodiment of the muffler support structure according to this invention. In Figure 2, 21
is a substantially cylindrical muffler, and this muffler 21 is suspended below the vehicle body in a substantially horizontal state. A tail tube 22 for discharging exhaust gas to the outside projects approximately horizontally from the end plate 21A forming the rear end surface of the muffler 21. They used to be arranged in a straight line. Further, 23 indicates a center tube, which introduces exhaust gas into the muffler 21. End plate 21
One end of a support bracket 24 is fixed (welded) to the lowermost end of A, and an intermediate bracket 27 is fixed to the other end of the support bracket 24 with bolts 25 and nuts 26. middle bracket 2
7 has a protrusion, and this protrusion is inserted and fixed into a lower end hole of a bumper rubber 28, which is an elastic member. The upper end of the bumper rubber 28 is fixed by a bolt 29 and a nut 30 to a vehicle body side bracket 31 that projects downward from the vehicle body, and a predetermined gap is formed in the center of the bumper rubber 28. The support bracket 24 extends below the tail tube 22 in the same direction as the tail tube 22, is formed of a member having a U-shaped cross section, and has one end of the tube 22 fixed to the end plate 21A. is located below the other end connected to the intermediate bracket 27. That is, the support bracket 24 has an inclined surface that is gradually inclined so that the rear side is higher in a substantially vertical plane (it has a so-called curvature shape).

Therefore, the muffler 21 is attached to the support bracket 2
4. It is elastically suspended and supported by the vehicle body via the intermediate bracket 27 and the bumper lever 28, and since the support bracket 24 has an inclined surface that is higher on the rear side below the tail tube 22, when the vehicle backs up If a protrusion on the road surface directly contacts the lower end of the end plate 21A of the muffler 21, the muffler 2
1 itself will not be damaged. That is, when backing up, the support bracket 24 first comes into contact with the protrusion, and at this time, the other end of the support bracket 24 is connected to the vehicle body via the bumper lever 28, so even if the collision load is large (even if the backward speed is high) ) The rubber 2
It is absorbed by the deformation of 8. As a result, the possibility that the joint (welded part) between the support bracket 24 and the end plate 21A will peel or crack can be eliminated. Further, in this case, since the impact load does not directly act on the tail tube 22, the fear of damage or deformation of the tube 22 can be eliminated.

Although the bumper rubber 28 is used as the elastic member in the above embodiment, it is of course possible to use a spring or the like as is well known.

(Effects) As explained above, according to this invention,
It is possible to eliminate the possibility that the joints between the tail tube and the muffler and their damage prevention members will be separated or deformed.

Further, in the above embodiment, by suitably setting the shape of the support bracket, etc., it is possible to reduce the membrane vibration of the end plate.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing a conventional muffler support structure, and FIG. 2 is an exploded perspective view showing an embodiment of the muffler support structure according to the present invention. 21...muffler, 21A...end plate,
22...Tail tube, 24...Support bracket, 28...Bumper rubber (elastic member).

Claims (1)

[Scope of utility model registration request] The muffler includes a muffler supported substantially horizontally below the vehicle body, a tail tube protruding from an end plate of the muffler, a support bracket having one end fixed to the end plate, and an elastic member connecting the support bracket to the vehicle body. 1. A support structure for a muffler, wherein the support bracket has an inclined surface extending rearward and upward from a lower end side of the end plate.