JPH10324163A - Structure of tail pipe part in muffler of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tail pipe in a muffler of an automobile, by which the problems found in a conventional muffler where the tail pipe is fixed and extended at a rear part of a muffler body, and an exhaust opening of the tail pipe is positioned at a lower part of a bumper, can be improved. SOLUTION: A tail pipe 4 of a muffler comprises a fixed pipe 2 which is extended from a rear face of a muffler body 1, and a movable pipe which is engaged with the fixed pipe 2 movably in the forward and backward direction, and which can be fixed on an arbitrary position, a position of a rear edge opening part 3a of the tail pipe 4 can be adjusted, and the movable pipe 3 side can be exchanged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a tail pipe portion in an automobile muffler.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a muffler 10 for exhausting an exhaust gas from an engine while silencing the exhaust gas is disposed in a lower rear portion of a chassis, and extends from a muffler body 11 as shown in FIG. The tip of the tail pipe 12 is located generally below the bumper 13. The tail pipe 12 is a large-diameter tank-shaped muffler body 1.
1 is fixed to the rear surface by welding, and the cross-sectional shape of the rear end is generally circular or oblong circular,
In recent years, tail pipes having a rectangular cross section have also been provided.

[0003]

However, since the tail pipe in the conventional muffler is constituted by a single pipe fixed to the rear surface of the muffler body by welding and extended, the tail pipe is located at the lower end of the bumper. The position of the tip of the tail pipe is not always constant, and the position of the tip of the tail pipe cannot be adjusted. In addition, not only can the soot staying in the tail pipe be removed and cleaned easily, but also if the tip of the tail pipe is damaged or deformed due to an unexpected accident, it is difficult to repair or replace it.

In recent years, the shape and the position of the tip of the tail pipe have been attracting attention as forming a unique rear style of an automobile. By replacing the tip of the tail pipe, the rear style is stylish. It is desired to change to.

According to the present invention, the position of the tip of the tail pipe of the muffler can be set arbitrarily, the rear end of the tail pipe can be easily replaced, and the opening shape of the rear end of the tail pipe can be changed. It is intended to provide a structure of a tail pipe portion in a muffler of an automobile capable of performing the following.

[0006]

SUMMARY OF THE INVENTION The present invention provides a tail pipe extending rearward from a muffler body, a fixed pipe extending from a rear surface of the muffler body, and an arbitrary pipe fitted to the fixed pipe so as to be movable in the front-rear direction. The above problem has been solved by comprising a movable pipe that can be fixed at a position. That is, the structure of the tail pipe portion in the muffler of the automobile of the present invention is such that a movable pipe that can move in the front-rear direction is fitted to an outer peripheral portion of a fixed pipe extending from a rear portion of the muffler body, Is characterized in that it is configured to be fixed to a fixed pipe.

[0007] At least a front portion of the movable pipe, which is fitted to the fixed pipe, is fitted to the outer peripheral surface of the fixed pipe of the existing muffler with substantially no gap, and is formed to move back and forth along the fixed pipe. The rear portion extending to the side does not necessarily have to have the same shape as the front portion, may have a shape that is expanded in a trumpet shape, or may have a sectional shape different from that of the fixed pipe. And the means for attaching the movable pipe to the fixed pipe is not particularly limited,
For example, several screws are provided on the front part of the movable pipe that fits with the fixed pipe, the position of the movable pipe is set arbitrarily, then the movable pipe is fixed to the fixed pipe by tightening the screws, and the tail pipe of the muffler It is good to do.

The movable pipe is preferably formed of a metal having a high corrosion resistance, for example, a steel plate which is subjected to chrome plating or gold plating, or a stainless steel plate.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings based on embodiments.
Is a muffler body of an automobile, 2 is a fixed pipe fixedly extended to a rear portion of the muffler body, 3 is a movable pipe fitted to the fixed pipe 2 so as to be able to move back and forth, and 4 is composed of a fixed pipe 2 and a movable pipe 3 Shown tail pipe.

FIG. 1 shows that a cylindrical movable pipe 3 having an inner diameter equal to the outer diameter of the fixed pipe 2 can be moved back and forth on a cylindrical fixed pipe 2 fixedly extended to the rear portion of the muffler body 1. Fits and forms tail pipe 4, movable pipe 3
In this embodiment, the rear end opening 3a can be fixed to the lower end of the bumper of the automobile by screws 5 in an arbitrary position. When the thickness of the movable pipe 3 is small, as shown in FIG.
The belt-shaped ring 6 is fitted to the front position of the ring 5, and the fixing screw 5 is preferably provided on the ring 5.

FIG. 2 shows a tail pipe 4 in which a horizontally long circular movable pipe 3 is fitted to the outer periphery of a horizontally long circular fixed pipe 2 fixedly extended at the rear portion of the muffler body 1 so as to be able to move back and forth.
In this embodiment, the rear end opening 3a of the movable pipe 3 can be fixed at an arbitrary position with respect to the lower end of the bumper of the automobile by means of the screw 5 in the same manner as described above.

FIG. 3 shows a movable pipe 3 in which a front portion 3b has a cylindrical shape and a rear portion 3c has a trumpet shape. The movable pipe 3 is fixedly extended to the rear portion of the muffler body 1 in the front portion 3b. An embodiment is shown in which the tail pipe 4 is fitted to the fixed pipe 2 so as to be able to move back and forth.

FIG. 4 shows a movable part in which the front part 3b has a cylindrical shape, and the rear part 3c has a sectional space gently expanded toward the rear end and the rear end opening 3a has a rectangular cross section. The pipe 3 is fitted to the cylindrical fixed pipe 2 fixed and extended to the rear part of the muffler body 1 at the front part 3b so as to be able to move back and forth to form a tail pipe 4, and the rear end of the movable pipe 3 as described above. This embodiment shows an embodiment in which the opening 3a can be fixed to the lower end of the bumper of the automobile by screws 5 in an arbitrary position.

FIG. 5 shows the conventional muffler 1 shown in FIG. 7 in which the movable pipe 3 having a rectangular cross section at the rear end opening 3a is fitted to the cylindrical fixed pipe 2 and the tail pipe 4 An example is shown. As shown in FIG. 6, the rear end opening 3a of the movable pipe 3 may be flattened to reduce the cross-sectional area.

[0015]

As described above, the structure of the tail pipe portion of the muffler of the vehicle according to the present invention is such that the movable pipe 3 movable in the front-rear direction is provided on the outer peripheral portion of the fixed pipe 2 extending from the rear portion of the muffler body 1 of the vehicle. Is fitted to the movable pipe 3
Is configured so that it can be fixed to the fixed pipe 2 at an arbitrary position, so that the following effects are exhibited.

By adjusting the movable pipe 3 back and forth, the tip of the tail pipe 4 at the lower end of the bumper can be set to an arbitrary position, and the tip of the tail pipe is damaged or deformed by an unexpected accident. In this case, it can be easily repaired by replacing only the movable pipe 3. In addition, cleaning of the tip of the tail pipe 4 where soot stays most remarkably can be easily performed by removing the movable pipe 3, and a decrease in exhaust efficiency can be prevented.

Further, as described above, for example, the front part 3 is attached to the cylindrical fixed pipe 2 of the conventional muffler body 1.
b is a cylindrical shape fitted to the fixed pipe 1, and the rear portion 3
c is a movable pipe 3 whose cross-sectional space is gently expanded toward the rear end and the rear end opening 3a has a rectangular cross-sectional shape.
When the rear end opening 3a of the movable pipe 3 is set at a desired position with respect to the lower end of the bumper of the automobile, the rear end opening 3a of the movable pipe 3 is set.
The position and shape of “a” creates a unique rear fashion that is different from that of cars of the same model, and the exhaust flow velocity changes depending on the shape and size of the rear end opening 3a. You can enjoy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tail pipe in a muffler showing an embodiment of the present invention.

FIG. 2 is a perspective view of a tail pipe showing another embodiment of the present invention.

FIG. 3 is a perspective view of a tail pipe showing another embodiment of the present invention.

FIG. 4 is a perspective view of a tail pipe showing still another embodiment of the present invention.

FIG. 5 is a rear perspective view of an automobile equipped with the tail pipe of FIG. 5;

FIG. 6 is a perspective view of a tail pipe showing still another embodiment of the present invention.

FIG. 7 is a rear perspective view of a conventional automobile.

[Explanation of symbols]

 1. 1. Muffler body Fixed pipe 3. Movable pipe 3a. 3. Opening of rear end of movable pipe Tail pipe

Claims (2)

[Claims] A movable pipe which is movable in the front-rear direction is fitted to an outer peripheral portion of a fixed pipe extending from a rear portion of a muffler main body, and the movable pipe can be fixed to the fixed pipe at an arbitrary position. The structure of the tailpipe in the muffler of an automobile, characterized in that: 2. A tail pipe portion of a muffler for an automobile according to claim 1, wherein a tip portion of said movable pipe has a cross-sectional shape different from a cross-sectional shape of a fitting portion with a fixed pipe. Construction.