JPH02286818A - Silencer supporting device - Google Patents

Abstract

PURPOSE:To reduce the number of parts used and enhance the easiness in assembly by inserting mounting rubber fitted to the muffler from the free end of a muffler hanger, and thereby hanging the muffler. CONSTITUTION:One end of a rod-shaped muffler hanger 18 is fixed to the frame 5 of a car and held approx. horizontally. The other end of muffler hanger 18 is used as a free end, wherefrom mount rubber pieces 27, 28 provided at the muffler 1 are inserted to cause it to be supported hung at the muffler hanger 18. Thereby the muffler 1 is held hung even though the operator releases his hand from it, that reduces his work. This reduces the number of parts to be installed and facilitates assemble works.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a supporting device for a muffler used in an automobile engine or the like.

(Prior Art) The support structure of a conventional silencer (hereinafter referred to as a muffler) used in an automobile engine, etc., as shown in Fig. 5, consists of a mount rubber bracket 2 fixed to the circumferential surface of a muffler l by welding or the like. Then, a mount rubber 3 is fixed to this mount rubber bracket 2 with bolts 4. The mount rubber 3 was fixed with bolts 9 to a bracket 6 fixed to a vehicle frame 5 and a bracket 8 fixed to a floor plate 7, so that the muffler 1 was suspended and supported.

In the figure, lO is a center vibrator, 11 is a catalytic converter, 12 is a flange connected to the exhaust, and 13 is a tail pipe. In the vicinity of the catalytic converter 11, a bracket 15 is connected via the mount rubber 14.
is supported on the vehicle side.

Basically the same muffler support device as shown in FIG.
It is shown in the publication No.-204913.

That is, the mount rubber bracket to which the mount rubber is attached is fixed to the muffler.

(Problems to be Solved by the Invention) The conventional muffler support device described above has the following problems in terms of ease of assembly.

In FIG. 6, after inserting the four collars 16 into the holes of the mount rubber 3, the mount rubber 3 is attached to the bracket 6 fixed to the frame 5 and the bracket 8 fixed to the floor plate 7 with bolts 9. . As shown in FIG. 7, nuts are attached to the back sides of the brackets 8 and 6 by welding.

Next, while lifting and supporting the muffler 1 in the direction of arrow Then, while inserting the bolt 4 into the collar 16, fasten it to the screw hole provided in the mount rubber bracket 2.

As described above, the conventional mount support requires attachment of four collars 16 and fastening of four bolts 9 and 4.

A particularly difficult task is to align the bolts 4 with the screw holes of the mount rubber bracket 2 and tighten the bolts 4 while the muffler 1 is lifted and supported.

Normally, this work requires two people: one to lift and support the muffler 1, and the other to tighten the bolts 4. There is a problem that the mutual screw threads are crushed.

As described above, the number of parts to be assembled is large and the assembly workability is poor, resulting in a problem of low productivity.

Furthermore, since the mount rubber bracket 2 is fixed to the muffler 1 by welding or the like, it is difficult to align the flange 12 shown in FIG. 5 when connecting it to an exhaust pipe (not shown).

Therefore, after tightening the flange 12 while aligning the flange 12 by loosening the tightening of the bolt 4 or 9 shown in FIG. 6, it is necessary to retighten the bolt 4 or 9. There is a problem with bad sex.

Next, when viewed from the viewpoint of vibration and noise, there are the following problems.

As shown in FIG. 7, when the muffler 1 is assembled, the bracket 8 is attached to the floor plate 7, which is a thin iron plate (0.8s+w), so its rigidity is extremely low. be. On the other hand, the bracket 6 is
It is fixed to a frame 5 with great rigidity.

In this way, when the muffler 1 is supported by the bracket 6 with a large rigidity force and the bracket 8 with a small rigidity force, the vibration of the muffler l is transmitted to the bracket 8 side with a small rigidity force, and the floor plate 7 vibrates. There is a problem in that it generates a lot of noise.

The present invention reduces the number of parts and improves ease of assembly.
Furthermore, it is an object of the present invention to provide a support device for a muffler that also reduces noise generation.

(Means for Solving the Problems) In order to solve the above problems, a first means according to the present invention is to fix one end of a bar-shaped muffler hanger 18 to the frame 5 of a vehicle and hold it approximately horizontally. The other end of the muffler hanger is the free end, and the free end of the muffler hanger 18 is connected to the muffler? The muffler 1 is suspended and supported by the muffler hanger 18 by inserting the mount rubbers 27 and 28 provided in the muffler hanger 18.

A second means is to rotatably provide a muffler bracket 30 formed in an approximately U-shape at the rear end of the muffler 1 in the mount rubber 27, 28 provided on the muffler 1 of the first means. Mount rubber 27 on bracket 30
．． 2B is installed.

(Function) With the above configuration, when assembling the muffler, the mount rubber attached to the muffler is inserted through the free end of the muffler hanger to suspend the muffler. Therefore, even if the worker takes his hand off the muffler, the muffler remains suspended, so the worker no longer has to lift and support the muffler.

Further, since the mount rubber is inserted through the rod-shaped muffler hanger, the mount rubber can be rotated relative to the muffler hanger, and the flange and the exhaust pipe can be easily aligned.

By providing the muffler bracket in a rotatable manner at the rear end of the muffler, the muffler can be moved freely in the axial direction and vertical direction even after the muffler is hung and assembled on the muffler hanger, allowing the flange and exhaust vibe to move freely. It becomes easier to connect with.

Next, regarding vibration, one end of the muffler hanger is fixed to the frame and has a rigid structure, and the other end is free and does not contact the floor plate, etc., so there is virtually no vibration on the vehicle side. It doesn't get across.

(Example) An example of the present invention will be described in detail below. First, referring to FIG. 2, an overview of the entire muffler support device will be explained. A muffler hanger bracket 17 is fixed to the vehicle frame 5 by welding or the like. A rod-shaped muffler hanger 18 is fixed approximately horizontally to the muffler hanger bracket 17 by welding or the like. Mount rubbers 27 and 28 attached to the muffler 1 are inserted into the muffler hanger 18 and fastened with nuts 24.
The muffler 1 is suspended and supported by a muffler hanger 18.

In this embodiment, the mount rubber 27, 28 is the muffler 1.
U-shaped muffler bracket 3 attached to the rear end surface
It is attached to 0.

1O is a center vibe, 11 is a catalytic converter, 12 is a flange connected to an exhaust pipe (not shown), 1
3 is a tail vibe. 14 is a mount that supports the vicinity of the catalytic converter 3, and 15 is a bracket thereof. 7 is a floor plate.

To explain in more detail with reference to FIG. 1, a muffler hanger bracket 17 is fixed to the frame 5 by welding or the like. This muffler hanger bracket 17 is attached to the frame 5
The muffler hanger boss 34 of the muffler hanger 18 penetrates through the middle dimension β and is provided approximately horizontally, and is welded by welding W. .

In this way, the width dimension β of the muffler hanger bracket 17
By penetrating the muffler hanger boss portion 34 and integrating it with welding W, the muffler hanger 18 and the muffler hanger bracket 17 have a completely rigid structure with respect to the frame 5, and the muffler l is attached to the muffler hanger 18. The load when supported on a cantilever is the muffler hanger bracket 17.
Due to the span of the middle dimension 2, the muffler hanger boss part 34
It acts as a shearing force.

In this way, the rod-shaped muffler hanger 18 is fixed to the frame 5 approximately horizontally, with one end fixed to the muffler hanger bracket 17 and the other end free.

Reference numeral 19 denotes a stopper collar, which serves to position the mount rubber 28 when inserted into the mount rubber attachment part 20.
The fit between the mount rubber attachment part 20 and the mount rubber 28 is a static fit or a somewhat tight fit.
The mount rubber 28 is directly inserted into the mount rubber attachment part 20 without using a collar. 21 is the small diameter part of the hanger, and the mount rubber 28 is attached to the muffler hanger 1.
This is to facilitate insertion of the mount rubber 28 when inserting from the free end of the muffler hanger 18, and to reduce the weight of the free end side of the muffler hanger 18 in terms of material mechanics, thereby improving vibration absorption. be.

Reference numeral 22 denotes a collar attachment part, which is made smaller in diameter than the hanger small diameter part 21 to form a step between the hanger and the small diameter part 21. The washer 26 is brought into contact with this stepped portion, the collar 25 is inserted, the mount rubber 2f is attached, and the nut 24 is screwed into the threaded portion 23 formed at the free end of the muffler hanger 18 for fastening.

The collar 25 is provided to protect the mount rubber 27 from being crushed during the above-mentioned fastening, and to maintain appropriate tightening force of the nut 24 with the washer 26.

30 is a muffler bracket formed approximately in a U-shape, and a muffler bracket support plate 32 is provided on the rear end surface of the muffler l.
It is rotatably mounted. The mount rubbers 27 and 28 are attached to a mount rubber attachment portion 31 formed at the tip of the muffler bracket 30 with bolts 29.

The operation of this embodiment configured as above will be explained next.

First, the muffler 1 is assembled as follows.
In the figure, the mounting rubbers 27 and 28 are attached to the muffler 1 on the ground FL.

That is, the three collars 25 are attached to the mounting rubbers 27 and 28.
into the hole of the muffler bracket 30 with the bolt 29.
Attach to the mount rubber attachment part 31 of.

This work can be done easily since it is done on the ground.

Next, lift the muffler l with the mount rubber 27 and 28 attached, and first attach the mount rubber 28 to the muffler hanger 1.
8 from the free end (threaded part 23), and then the washer 26 is inserted, and then the mount rubber 27 (collar 25) is inserted into the threaded part 23 while fitting the mount rubber 28 into the mount rubber attachment part 20.

In FIG. 3, the free end of the muffler hanger 18 has only a threaded portion 23, and as shown in FIG.
2 is not provided, but in short, any mount rubber 27 may be inserted and fastened between the washer 26 and the nut 24.

In this state, even if the worker takes his hand off the muffler l, the muffler l is suspended and supported by the muffler hanger 18, and even if the nut 24 is not tightened, the mount rubber 28 and the mount rubber attachment part 20 are connected. Due to the fit between them, the muffler l will not fall off from the muffler hanger 18.

Therefore, the mount rubber 27.28 is the muffler hanger 18.
The flange 12 can be rotated freely in the six directions shown by the arrows shown in FIG. 4, and the inclinations (4) and (b) of the flange 12 relative to the exhaust vibe 33 can be easily adjusted.

In this way, the flange 12 is attached to the exhaust vibe 3.
3, the assembly of the muffler 1 is completed by tightening the nut 24 shown in FIG.

When assembling this muffler 1, mount rubber 27
．． 28 may be fixed to the muffler l.

On the other hand, when the muffler bracket 30 is rotatably attached to the rear end of the muffler 1, the following effects occur.

When the muffler 1 is assembled to the muffler hanger 18, as shown in FIG.
It is movable in the directions of arrows A and B centering on 0.

Therefore, first, the muffler 1 is assembled by completely tightening the nut 24 to the muffler hanger 18, and then the flange 12 is moved in the directions of arrows A and B (a).

(b) By adjusting the deviation etc., it becomes possible to easily attach the flange 12 to the exhaust vibe 33.

Next, the effect on vibration is as follows.

As shown in FIG. 1, when the muffler 1 is assembled, the muffler l is suspended via the mount rubbers 27 and 28 on the muffler hanger 18, which is supported by a rigid structure at one end and is free at the other end. It's lowered.

Therefore, the vibration of the muffler l is buffered by the mount rubbers 27 and 28 and transmitted to the muffler hanger 18.

The vibrations exerted on the muffler hanger 18 in this way vibrate most strongly at the free end of the muffler hanger 18,
It decreases as it goes to the muffler hanger bracket 17,
It becomes zero at the muffler hanger bracket 17, which has a rigid structure. As a result, the vibrations of the muffler 1 are not transmitted to the vehicle body side, such as the floor plate 7, and no noise is generated.

In addition, the vibration in the axial direction of the muffler l is caused by the muffler hanger 18.
The vibration in the axial direction of the muffler 1 is completely absorbed by making the muffler bracket 30 rotatable.

(Effects of the Invention) As detailed above, according to the present invention, the muffler is suspended and supported by inserting the mount rubber into the muffler hanger, which has one end fixed to the frame and the other end free. The attachment can reduce the number of parts, and
The assembly process was easy and the vibrations of the muffler were not transmitted to the vehicle body.

In addition, since the muffler bracket is provided so that it can be rotated, overall assembly to the exhaust pipe, etc. is facilitated, and it is possible to obtain a support device for the muffler that simultaneously improves productivity and reduces noise generation. can.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view of an embodiment of the present invention, FIG. 2 is a perspective view showing the supporting state of the entire muffler to which the embodiment of FIG. 1 is applied, and FIG. 3 is an embodiment of the embodiment of FIG. 1. The assembly is shown in the exploded view, No. 4.
The figure is a schematic diagram of the entire muffler assembled using the embodiment shown in Figure 1, Figure 5 is a perspective view of a conventional muffler support device, and Figure 6 shows the assembly of the conventional example shown in Figure 5. Exploded view, FIG. 7 is a rear view of the muffler after assembly is completed in FIG. 6. 1...Muffler 5...Frame 17...Muffler hanger bracket 18...Muffler hanger 27, 28...Mount rubber 30...Muffler bracket! i l Figure Patent applicant Suzuki Motor Co., Ltd. (2 idiots) 1...Muffler 5...Frame 17...Muffler hanger bracket 18゛°°Muffler hanger Figure Figure Figure Figure Procedure correction Document: July 24, 1990, 1999 Patent Application No. 109285 2, Name of the invention: Silencer support device 3, Relationship with the case of the person making the amendment: Name of the patent applicant (208) Suzuki Motor Co., Ltd. 4, Agent
Address: 56 Ochanomizu Square Building B, 6, Kanda Surugadai, Chiyoda-ku, Tokyo Date of amendment "Voluntary" 6. Subject of amendment 7. Contents of amendment (1) Amend the scope of claims in the specification by attaching a separate sheet. . (2) On page 6, line 16 of the specification, the phrase "approximately 0-shaped" is amended to read "approximately U-shaped." (3) Specification, page 6, line 17, page 7! 4th line, 11th
Delete "rotatably" in line 13 of the page. (4) In the bottom line of page 13 of the specification, after "in contrast," insert "after taking appropriate measures to prevent noise generation and wear." (5) On page 15, lines 12 to 14 of the specification, "absorbed, and furthermore...absorbed." is corrected to "absorbed." (6) Delete "Also, a muffler bracket can be obtained" from lines 3 to 7 on page 16 of the specification. (Attachment) (1) Fix one end of a bar-shaped muffler hanger to the vehicle frame and hold it approximately horizontally, and leave the other end of the muffler hanger as a free end and insert the mount rubber provided on the muffler through the free end. A support device for a silencer, characterized in that a muffler is suspended and supported on a muffler hanger. (2) In the rubber mount provided on the muffler according to claim 1, a muffler bracket is provided at the rear end of the muffler, and the rubber mount is attached to the muffler bracket. support device.

Claims (2)

[Claims] (1) Fix one end of a rod-shaped muffler hanger to the vehicle frame and hold it approximately horizontally, and leave the other end of the muffler hanger as a free end, and insert the mount rubber provided on the muffler from the free end to attach the muffler to the muffler. A support device for a silencer, characterized in that it is suspended and supported on a hanger. (2) The mount rubber provided in the muffler according to claim 1, characterized in that a muffler bracket formed in an approximately U-shape is rotatably provided at the rear end of the muffler, and the mount rubber is attached to the muffler bracket. A supporting device for a silencer.