JPH0541210Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an exhaust gas purification device capable of absorbing vibrations and incorporated into the exhaust system of an automobile or the like.

<Prior art> Exhaust purification devices that are conventionally used in the exhaust systems of automobiles, etc. are located in the middle of the exhaust pipe between exhaust pipe A and exhaust pipe B, and both ends of the purification device casing are connected to the exhaust pipe. It was firmly connected to the flange structure provided on AB by tightening and fixing. The inside of this exhaust purification device is filled with a catalyst, and its weight is approximately 3 to 5 kg. To support this, the axis of the exhaust pipe AB and the axis of the purification device casing are kept in a constant relationship. The tightening was strong.

<Problems to be solved by the invention> Therefore, since the structure was fixed using a flange, there was no vibration absorption, and vibrations from the engine and the road surface were transmitted through the exhaust system, causing noise such as squeaking. Sound and unpleasant vibrations may be transmitted into the vehicle interior, becoming a source of noise, making the ride uncomfortable, and even causing damage to the welded part of the exhaust pipe flange or the bent part of the exhaust pipe. It was hot.

<Means to solve the problem> Therefore, as a result of considering a structure that allows the exhaust purification device to be firmly attached to the exhaust pipe and also has measures against vibration, we have developed the following structure. They developed a vibration-absorbing exhaust purification device.

Its structure is an exhaust pipe A having a spherical bulge 2.
1 and an exhaust pipe B3 or casing 6 having a funnel-shaped flared end 4 that covers a part of the outer peripheral surface of the spherical bulging end, forming a spherical abutting part 5. A catalyst 7 is provided in a casing 6 having an inner or spherical abutting portion 5 at the end thereof, and a tightening band 8 is provided on the spherical abutting portion 5 to cover its circumference. It is something.

<Function> With this structure, exhaust pipe A and exhaust pipe B
While the catalyst 7 between them is held stably, the spherical abutting portion 5 flexibly absorbs the applied vibrations, providing a muffling effect and preventing undue force from being applied to other parts. Doesn't work.

<Examples> Examples of the present invention will be described in detail below with reference to the drawings.

Figures 1 and 2 show a first embodiment of the present invention, where Figure 1 is a central vertical cross-sectional view corresponding to section XX in Figure 2, and Figure 2 is a perspective view. .

This embodiment is an exhaust pipe A1 having a spherical bulge 2.
and an exhaust pipe B3 having a funnel-shaped flared end 4 that covers a part of the outer circumferential surface of the spherical bulging end. This is a built-in structure. A tightening band 8 is provided on the spherical abutting portion 5 to cover its circumference, and is fastened with a screw 9 to partially cover the spherical bulging portion 2 of the exhaust pipe A. Exhaust pipe B3
The funnel-shaped flared end portion 4 is prevented from separating. With such a structure, as shown by the two-dot chain line in Fig. 1, vibrations that cause misalignment of the axes of either or both of the exhaust pipes A1 and B3 are applied. It can also be bent at that part to flexibly accommodate this.

FIG. 3 is a longitudinal sectional view showing a second embodiment of the present invention. In this example, the catalyst 7 is packed into a cylindrical casing 6. Both ends of the casing 6 are funnel-shaped flared ends 4, 4, and these flared ends 4, 4 are connected to spherical bulges 2, 2 provided in the exhaust pipe A1 and exhaust pipe B3, respectively. be combined. With such a structure, vibrations are absorbed at both ends of the exhaust purification device casing 6. In this example, flared ends are provided at both ends of the casing 6,
Although the exhaust pipes A and B have spherical bulges, conversely, spherical bulges can be provided at both ends of the casing 6, and the exhaust pipes A and B can have funnel-shaped flared ends. . It is also possible to provide the spherical abutting portion 5 only at one end of the casing 6 instead of at both ends, and use a conventional flange joint 9 or seal ring at the other end, as shown in FIG.

The structure of the third embodiment of the present invention shown in FIG.
The exhaust gas purification device casing 6 has a cylindrical shape with both ends constricted as in the conventional case, and spherical abutting portions 5, 5 similar to those shown in FIG. This structure connects the exhaust pipe A1 and the exhaust pipe B3 via the exhaust pipe A1 and the exhaust pipe B3. This spherical abutment may be provided only on one side. Such a structure also absorbs vibrations well.

In addition, the embodiment of the present invention is not limited to this, for example, only one side of the casing is made into a spherical surface as shown in FIG. 3, and the other side is constricted as shown in FIG. Then, it is possible to take a structure like this.

<Effects of the invention> Since the present invention has the above-described structure, the exhaust purification device itself can absorb vibrations, thereby increasing the strength and durability of the device. It also enables exhaust gas purification and noise reduction at the same time.

[Brief explanation of drawings]

Figures 1 and 2 show a first embodiment of the present invention, where Figure 1 is a central vertical cross-sectional view corresponding to section XX in Figure 2, and Figure 2 is a perspective view. . Third
5 to 5 are longitudinal sectional views showing other embodiments of the present invention. 1... Exhaust pipe A, 2... Spherical bulge, 3...
Exhaust pipe B, 4...flare end, 5...spherical abutment, 6...casing, 7...catalyst, 8...tightening band.

Claims (1)

[Scope of utility model registration request] A spherical abutting portion 5 is formed by an exhaust pipe A1 having a spherical bulging portion 2 and an exhaust pipe B3 or casing 6 having a funnel-shaped flared end 4 that covers a part of the outer peripheral surface of the spherical bulging end. A catalyst 7 is provided in the spherical abutting portion 5 or in a casing 6 with the spherical abutting portion 5 provided at the end thereof, and the spherical abutting portion 5 is tightened to cover the circumference of the spherical abutting portion 5. A vibration absorbing exhaust purification device provided with a band 8.