JPS5848708A - Coupling structure of manifold and converter - Google Patents

Abstract

PURPOSE:To secure uniform surface pressure of a flange by providing tapered parts around the outer peripheries of coupling flanges of an exhaust manifold and a catalyst converter, and clamping and coupling both tapered parts by means of taper metal fittings engaged with the tapered parts. CONSTITUTION:To the flange of the lower end of an exhaust manifold 1, the upper flange of a casing of the catalyst converter accommodating therein a catalyst 8 is coupled. Upon coupling, one-sides of both flanges are coupled by means of a bolt 4 as heretofore, and other sides thereof are clamped by fitting metal fittings 5 inner surfaces of which form tapered shapes 5a and 5b into the tapered parts 13 and 14 on the outer surfaces of both flanges, and screwing the bolt 6 in the screw hole of the flange.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coupling structure for a manifold converter.

Conventionally, the case housing the catalyst body and the manifold side are connected by connecting the manifold 1 and the 7 flange portions of the case 2 to the screw holes 3 of the case with bolts and nuts 4, as shown in FIGS. 1 and 2, for example. is common. However, 7
In order to ensure the sealing performance of the lunge joint, it is necessary to maintain internal pressure through the rigidity of the flange and the uniform arrangement of bolts, but the uniform arrangement of bolts has many restrictions such as the surrounding space and the direction of assembly. , it's also a little short on design.

The present invention solves the above-mentioned bolt arrangement problem by making it possible to tighten from the flange side, and also by using upper and lower through-bolts in combination to ensure uniform internal pressure and at the same time, to prevent assembly from being a nuisance to work. The purpose of this invention is to provide a coupling structure for a manifold converter.

Therefore, in the structure of the present invention, in the seven-flange joint structure of the exhaust manifold and the converter case, the joint surfaces of both flanges have a taper that substantially matches the taper of the seven flanges from one direction outside the flanges. Bolts are tightened using metal fittings, and a mating screw hole for tightening the Taber metal fitting is bored in either of the flanges.

Hereinafter, one embodiment of the present invention will be explained with reference to FIGS.
This will be explained with reference to the diagram.

In Fig. 3, l is a manifold, 2 is a converter case, 3 is a screw hole provided in the case 2, and 4 is a through port □ which is screwed and tightened into the screw hole 3. There is no big difference from the case in Figure 1 mentioned above, and 5 is the Kf84 figure in Figure 3, especially #! 5, a tapered metal fitting shouldering the tapered part 5 and 5b on a circular surface, 6 a bolt for fastening the tapered metal fitting 5, and 7 a screw for screwing the bolt 6 into the manifold l. 8 is the catalyst body, 9 is the Fi cushion carbon sheet, IO is the retainer, 1 is the fi gasket, 12 is the wire net bush*y, 13 is the taper provided in the 7 flange part of the flange of the The seat 14 is a tapered seat provided at the 7 flange portion of the case 2.

In other words, there is a taper seat 1 on the outer edge of the manifold l and case 2.
3 and 14 are provided, and the taper metal fitting 2 having portions 5m and 5b of the tee/() that almost matches the tapered surfaces of the seats 13 and 14 is provided with a taper fitting 2 of 1&m L, and the bolt 6 is inserted into the screw hole 7.
When engaged with K, the pushing force of the tapered surface acts as a component force in the axial direction of the 7 flange surface, and an effective surface pressure is maintained.

Note that the screw hole 7 may be provided in the 7 flange portion of the case 2.

As described above, the present invention' provides for connecting both the 7 flange of the converter and the flange of the teeth by using a tapered metal fitting from one direction from the outside of both the 7 flange, and
The tightening screw hole of the tapered metal fitting is drilled in the flange of the converter or the 7 langes of the case, and the force acting on the tapered surface tightens both 7 langes! Since the 1 mating surfaces are in close contact with each other, it is possible to make the joint part more compact, and by tightening the taper metal fitting, which is a small piece of metal fitting, to the 7 lange screw hole KIL, there is no problem like the clamp method where the joints are tied together. It has the advantage of being able to select the rigidity of the container due to the rigidity of the tapered metal fittings and the strength and verticality of the bolts.

[Brief explanation of the drawing]

Figure 1 is an elevational sectional view showing an example of a conventional joint structure, Figure 2 is a plan view, Figure 3 is an elevational sectional view showing an embodiment of the present invention, and Figure 4 is a plane view. FIG. 5 is a perspective view of the tapered metal fitting shown in FIG. 3. l...Manifold 2...K-25...Tapered metal fitting b~5b...Tapered part 6-bolt
7...Screw holes 1 & 14-Tapered piston 1 diagram? 2 Zuko 317! Il

Claims (2)

[Claims] (1) In the seven-flange joint structure of the exhaust manifold and the converter case, the fitting surfaces of both seven flanges are bolted from the outer circumferential direction of both flanges using matching taper metal fittings. and,
A coupling structure for a manifold converter, characterized in that the tapered metal fitting is tightened by forming a mating screw hole ri in either of the flanges. (2) Claim 11, which is also connected by a through-bolt of the tl and 7 flange portions of the tapered metal fittings.
The bonded structure described in i.