JPS626285Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a mounting device for an intake (exhaust) manifold of an internal combustion engine.

Various mounting devices have been proposed and put into practical use in order to reduce noise by blocking vibrations transmitted from the cylinder head to the manifold.
Examples of such conventional mounting devices include those described in Japanese Utility Model Application Publications No. 55-108261 and Japanese Utility Model Application Publication No. 55-78713.

That is, in the former, the connecting member which is tightened and fixed to the cylinder head and the manifold body are connected via a vibration isolating member to suppress the vibration of the manifold body. When a large rocking mode occurs, there is a problem in that the sealing surface of the vibration isolating member opens and gas leaks occur. The latter, disclosed in Japanese Utility Model Application Publication No. 55-78713, has a manifold 3 tightened and fixed to the cylinder head 1 via a metal elastic body 2, as shown in FIGS. 1 and 2. A sealing member such as a bellows 4 (see FIG. 1) or an elastic sleeve 5 (see FIG. 2) is interposed between the sealing surfaces of the cylinder head 1 and the manifold 3. However, in the past, as shown in the drawings, the bellows 4 or the telescopic sleeve 5 was simply fixed to the cylinder head 1 together with the manifold 3 with bolts 6, and the bolts 6 were in direct contact with the manifold 3. In this case as well, when the locking mode occurs, there is a problem in that an opening is created in the sealing surface of the bellows 4 or the telescopic sleeve 5, as in the case of the conventional example. In addition, 7 is a gasket, 8 is a heat-resistant sealing member, and 9 is a washer.

The present invention was developed in view of these conventional problems, and it mechanically connects and fixes the ends of the bellows that connect the cylinder head and the manifold to the cylinder head and the manifold, respectively, and also An object of the present invention is to provide a manifold mounting device that can eliminate the opening of the sealing surface that occurs when a locking mode occurs and avoid gas leakage by mounting and fixing the manifold to the cylinder head via an elastic body. .

The present invention will be explained in detail below based on illustrated embodiments.

FIG. 3 shows an embodiment of the present invention, in which a metal bellows 13 is provided to connect the cylinder head 11 and the manifold 12, and both ends of the bellows 13 are connected to the cylinder head 11 and the manifold 12. Gasket 14 between the sealing surface
It is sandwiched between. Further, the cylinder head 11
A stud bolt 15 is firmly planted in the stud bolt 15, and one end of the bellows 13 is tightened and fixed to the cylinder head 11 with a nut 16 screwed into the base end of the stud bolt 15.

On the other hand, the other end of bellows 13 and manifold 1
2 is tightened and fixed with the collar 17 and the nut 18, and then the collar 17 is attached to the elastic metal body 19.
The cylinder head 11 and the manifold 12 are connected to the collar 17, the metal elastic body 19, and the stud bolt 1 by tightening and fixing the elastic body 19 with a nut 20.
It is bonded and fixed via 5.

In other words, in the past, the manifold and bellows were fastened together using bolts or the like that tightened and fixed the manifold to the cylinder head via the vibration isolating member, so as the vibration isolating member deformed, the sealing surface of the bellows However, in the present invention, the ends of the bellows 13 are each tightened independently to connect the cylinder head 11 and the manifold 1.
At the same time, the manifold 12 is connected to the cylinder head 11 via the elastic body 19, so even if the elastic body 19 is greatly deformed due to vibration transmitted from the cylinder head 11 to the manifold 12, the bellows There is no risk that the sealing performance of No. 13 will be impaired.

For this reason, for example, even if locking mode occurs when the engine is idling, the bellows
There is no possibility of an opening occurring on the sealing surface of No. 3, and gas leakage is prevented. The bellows 13 is expandable and retractable, and since the cylinder head 11 and the manifold 12 are connected via the elastic body 19, the vibration isolation function between the cylinder head 11 and the manifold 12 is maintained. .

In the embodiment described above, one end of the bellows 13 and the cylinder head 11 are tightened and fixed with the nut 16 attached to the stud bolt 15, but as in the embodiment shown in FIGS.
and the bellows 13 are tightened and fixed with a bolt 21, and another bolt 22 is screwed into the bolt 21 to insert a metal elastic body 19 into which a collar 17 is inserted, which tightens and fixes the other end of the bellows 13 and the manifold 12. They may be tightened and fixed, or the two tightening components may be completely independent. The direction of the collar 17 is arbitrary, but the direction of the bellows 13 and manifold 12 is
In order to improve the ease of assembly, it is desirable to position the collar 17 on the manifold 12 side and the nut 18 on the bellows 13 side, as in the embodiment shown in FIG. and
In addition, in order to optimize the tightening margin of the metal elastic body 19, a collar or stepped bolt (not shown) may be used. Incidentally, since the elastic body 19 described above is required to have heat resistance, it is generally preferable that the elastic body 19 be made of a metal elastic body such as a spring or a metal complex, but any elastic body with high heat resistance may be used. It is optional.

As explained above, according to the present invention, the cylinder head and the manifold are connected through an elastic body, and a bellows is provided to connect the cylinder head and the manifold, and the end (sealing surface) of the bellows is connected to the cylinder head and the manifold. Since it is uniquely fixed to the sealing surface of the cylinder head and manifold,
Since opening of the sealing surface of the bellows can be avoided without impairing the vibration isolation effect between the cylinder head and the manifold, gas leakage as seen in the past can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional example, Fig. 2 is a sectional view of a modification of Fig. 1, Fig. 3 is a sectional view of the first embodiment of the present invention, and Fig. 4 is a sectional view of a second embodiment of the present invention. FIG. 5 is a cross-sectional view of a third embodiment of the present invention. 11... Cylinder head, 12... Manifold, 13... Bellows, 14... Gasket,
15...Studbolt, 16...Natsuto, 17
... Collar with collar, 18 ... Nut, 19 ... Elastic body, 20 ... Nut, 21 ... Bolt, 22 ...
…bolt.

Claims (1)

[Scope of utility model registration request] One end of the bellows is fixed to the cylinder head, the other end of the bellows is fixed to the manifold, the cylinder head and the manifold are connected through the bellows, and the manifold is attached and fixed to the cylinder head through an elastic body. Manifold mounting device for internal combustion engines.