KR20000021220U - Exhaust decoupler system - Google Patents

Abstract

The present invention relates to a decoupler for automobile exhaust pipe, tubular sleeve 10 is connected to the exhaust gas from the engine side to the inside;

An inner retainer member 20 coupled to the outside of the sleeve 10 toward the engine side, the rim 21 being bent at the end thereof in the circumferential direction;

An outer retainer member (30) positioned outside the inner retainer member (20) and having an end coupled to the inner retainer member (20), and the inner end of which is extended toward the center;

The guide retaining member 40 is divided between the inner retainer member 20 and the outer retainer member 30 to form a first pocket 41 and a second pocket 42, and is connected to the exhaust pipe. ;

A bellows 50 which is fixed between the rim 21 of the inner retainer member 20 and the guide ring member 40 to maintain the airtightness of the exhaust gas and absorb the expansion and bending;

A ring-shaped inner buffer member 60 and an outer buffer member 61 respectively filled in the first pocket 41 and the second pocket 42;

A bending angle control piece 70 for absorbing and controlling the displacement angle is provided by the outer buffer member 61 when the sheet is bent and deformed to the end of the guide ring member 40, thereby functionally absorbing the bending displacement. By minimizing the influence on the engine, the slide length of the guide ring member 40 flowing between the inner and outer buffer members 60, 61 is shortened to reduce wear and friction noise of the product durability and exhaust pipe It is a very useful design that can increase fatigue life.

Description

Exhaust decoupler system for automobile exhaust pipe

The present invention relates to a decoupler for an automobile exhaust pipe, and more specifically, among the various vibrations or load displacements generated between the engine and the exhaust system, in particular, when the banding displacement is received, the guide ring functionally absorbs the wear and friction noise of the guide ring. It is invented to minimize the effect, increase the fatigue life of the whole device, and improve the ride comfort.

Vehicles being developed today have increased engine power, resulting in increased engine roll vibrations when starting the engine, starting the car, braking, and shifting gears. In addition, vibration of the exhaust pipe occurs according to the state of the road surface while driving.

Therefore, in general, an exhaust pipe having a muffler is connected to an engine of a vehicle, and an exhaust pipe decoupler is connected to the connection portion to absorb and cushion vibration displacement, impact load, thermal deformation, and the like. Is installed. In addition, the exhaust pipe connector in such an installation position requires a robust and compact product capable of self-supporting the entire exhaust pipe with a small number of hanger mountings.

There are several known types of connectors, but GB 2,277, 969A is commonly used in the UK Patent No. 2,277, 969A to determine the center point of the banding displacement as a means to more effectively absorb the displacement of the banding. .

That is, as shown in FIG. 5, one sleeve 6 is separated by a sharply deformed protrusion 7 in a position where the sleeves 5 and 6 on both sides overlap with a space, and two pockets on both sides thereof are separated. And a buffer member 8 separated from each other in this pocket.

The bellows 9 is fixed between the sleeves 5 and 6 so as to be exposed to the outside on one side of the buffer members 8. Accordingly, one displacement center portion C, which can be bent and stretched, is formed at an approximately intermediate position where the sleeves 5 and 6 are overlapped, and a longitudinal stretch displacement from the vibration of the engine or the impact generated during driving. And the shock absorbing members 8 and the bellows 9 absorb the bending displacement in the state where the central axis angles before and after the exhaust pipe connecting portion intersect.

According to this structure, the bellows 9 is exposed to the outside, and stones and the like of the road are broken by the road while driving, or durability due to corrosion is reduced.

In addition, since the center of displacement C of the banding is located at the intermediate point of the buffer member 8 to absorb the buffer and the banding, the inner side sleeve 6 connected to the exhaust pipe side when an impact having a momentary large displacement is applied is provided. Since it is exposed to high temperature exhaust gas as it is, in this state, an impact load is repeatedly received and a fatigue life becomes short.

And, since the bellows 9 is forced by bending moment rather than pure angular motion (Bangular motion), the life is shortened.

In order to compensate for this, since the number of wrinkles (arithmetic) of the bellows 9 is increased, an increase in the overall length is necessary, and the selection of materials to be durable and high quality has to be taken.

As the shock absorbing members 8 are not suitable for absorbing large bandings as a result of the functional absorption of the displacement in the bending direction, the performance of the exhaust pipe connector D is degraded as a whole. There was an end to such being.

On the other hand, in order to solve such an end, the applicant's prior application design (Korean Utility Model Registration No. 98-1569) can be banded at a large displacement angle by sliding the guide ring member in the bending displacement direction between the buffer members. It has been suggested to do so.

However, in the case of the conventional prior application design configured as described above, although it has a useful bending displacement absorbing function in its own way, the length of the guide ring sliding between the outer mesh ring and the inner mesh ring when the large bending motion is received is unnecessary. Designed to be long.

Therefore, the wear of the guide ring is increased between the wire mesh ring and the friction noise is large.

An object of the present invention is to provide a decoupler for an automobile exhaust pipe that can functionally absorb the wear and friction noise of the guide ring.

Another object of the present invention is to provide a decoupler for an automobile exhaust pipe that can increase the fatigue life of the entire apparatus and improve the riding comfort.

Another object of this paper is to provide an exhaust pipe connector that can be easily installed in any vehicle type and conditions due to the relatively small structure of the connector itself.

1 to 2 is a configuration diagram showing a cross-sectional view of each embodiment of the decoupler for automobile exhaust pipe of the present invention.

3 and 4 are perspective views showing an embodiment of the inner and outer buffer members

Figure 5 is a cross-sectional view showing the configuration of a conventional decoupler for exhaust pipe

* Explanation of symbols for the main parts of the drawings *

10,11-Sleeve 20-Inner retainer member

30-outer retainer member 40-guide ring member

50-Bellows 60-Inner Shock Absorber

61-outer cushion 70-bending angle control

This configuration of the present invention and the tubular sleeve 10 is connected to the exhaust gas from the engine side to pass through;

An inner retainer member 20 coupled to the outside of the sleeve 10 toward the engine side, the rim 21 being bent at the end thereof in the circumferential direction;

An outer retainer member (30) positioned outside the inner retainer member (20) and having an end coupled to the inner retainer member (20), and the inner end of which is extended toward the center;

The guide retaining member 40 is divided between the inner retainer member 20 and the outer retainer member 40 to form a first pocket 41 and a second pocket 42, and is connected to the exhaust pipe. ;

A bellows 50 which is fixed between the rim 21 of the inner retainer member 20 and the guide ring member 40 to maintain the airtightness of the exhaust gas and absorb the expansion and bending;

A ring-shaped inner buffer member 60 and an outer buffer member 61 respectively filled in the first pocket 41 and the second pocket 42;

A bending angle control piece 70 is provided to allow absorption control of the displacement angle by the outer buffer member 61 when the sheet is bent and deformed to the end of the guide ring member 40.

Therefore, since the bending angle control piece 70 formed at the end of the guide ring member 40 controls the bending displacement angle by the outer buffer member 61, the displacement length of the guide ring member 40 is reduced.

In addition, by absorbing the bending displacement functionally to minimize the impact on the engine, and reduce the wear and friction noise of the guide ring member (40) flowing between the inner and outer buffer member (60, 61) and durability of the product The fatigue life of the entire exhaust pipe can be increased.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 2 show each embodiment of the decoupler for the exhaust pipe of the present invention, the bending angle control piece 70 of the guide ring member 40 when the bending displacement occurs, the outer buffer member 61. It is shown that the bending displacement angle is controlled by.

FIG. 1 shows the most basic embodiment in which the sleeve 10 is formed only on one side, and FIG. 2 shows an embodiment where the sleeves 10 and 11 are respectively installed on both sides.

3 and 4 show an embodiment of the inner and outer buffer members 60, 61 in a perspective view.

In general, the engine is supported by several mounting means, and has a muffler on the outlet side of the exhaust pipe, and connects the engine side and the exhaust pipe by an exhaust pipe connection port.

According to Figure 1, the inner retainer member 20 and the outer retainer member 30 are coupled to each other by the welding or crimping method so that the inner retainer member 20 and the outer retainer member 30 overlap each other outside the tubular sleeve 10 through which the exhaust gas passes from the engine side. The end of the inner retainer member 20 is formed in a shape in which the rim 21 is bent circumferentially in a flange shape, and the opposite end of the outer retainer member 30 is extended outward.

In this figure, when the hollow tubular sleeve 10 is located only on one side, it is positioned toward the engine side, and the other guide ring member 40 is connected to the exhaust pipe.

The inner retainer member 20 is positioned toward the engine and coupled to the outside of the sleeve 10, and the rims 21 are bent in the circumferential direction at the ends thereof.

Between the rim 21 and the guide ring member 40 of the inner retainer member 20 supports the bellows 50 to absorb the expansion and bending while maintaining the airtightness of the exhaust gas.

The bellows 50 serves to absorb the displacement in the stretch direction to the bending direction, and to prevent the leakage of the exhaust gas passing through the sleeve 10 and the guide ring member 40. 20) is fixedly installed in the longitudinal direction between the guide ring member 40.

This bellows 50 is repeatedly wrinkled as shown in the drawing so that the main body to restore when the external force is removed after absorbing the displacement in the longitudinal direction and the bending direction.

On the other hand, the method of attaching the bellows 50, as shown in Figures 1 to 2, the front end is in close contact with the inside of the inner retainer member 20, one side is positioned between the outer diameter of the sleeve 10, the other When the sleeve 11 is not installed at the side end, the sleeve 11 is closely attached to the inner diameter of the guide ring member 40 and then fixedly attached by welding or pressing means, but is not necessarily limited thereto. All means to make this happen will be included.

On the other hand, the outer retainer member 30 is coupled to the outside of the inner retainer member 20, respectively.

The outer retainer member 30 is in the shape of a trumpet, the tip of which is small in diameter, is engaged with the inner retainer member 20, and the other end toward the center has an expanded tube shape.

Then, the guide ring member 40 is installed to divide the inner retainer member 20 and the outer retainer member 30 so as to form the first pocket 41 and the second pocket 42 symmetrically on both sides. do.

Inner and outer buffer members 60 and 61 are positioned in the first pocket 41 and the second pocket 42 partitioned by the guide ring member 40.

The sleeve 10 has a short tubular shape and guides the exhaust gas to penetrate the inside of the sleeve 10 to prevent the protection of the bellows 50 and to prevent noise caused by the airflow sound of the gas. As shown in FIG. 2, the sleeve 10 may be installed only on the engine side and another sleeve 11 may be installed toward the exhaust pipe side symmetrically on both sides as shown in FIG. 2.

On the other hand, the guide ring member 40 may be integrally formed by the method of connecting two separate members by butt welding, as shown in the drawings, but as shown in the former for separate assembly It is suitable to connect the members by welding.

The inner and outer shock absorbing members 60 and 61 are respectively filled in the first pocket 41 and the second pocket 42, and the elastic displacement in the longitudinal direction along with the impact from the vibration of the engine or the road surface vibration during driving. It is an elastic material that can absorb the bending displacement elastically.

The inner and outer buffer members 60 and 61 are formed in a ring shape having a cross section corresponding to the shape of the first pocket 41 and the second pocket 42, and the material is compressed in any direction. After being semi-permanently possessed by the elasticity to be restored again, and easier to form, in general, the mesh woven into a thin wire is compressed to form a ring.

At this time, in the present invention, since the contact surface with the guide ring member 40 repeats friction repeatedly during bending, graphite or other suitable surface treatment means such as smooth sliding on the contact surface of the inner and outer buffer members 60 and 61 for durability. Lubricating coating is also preferable.

Therefore, this structure can also enable the self-supporting function of the exhaust pipe (SELF SUPPORTING).

The inner and outer buffer members 60 and 61 may be molded to have only a smooth ring shape, but may be molded to have a geometrical shape as shown in FIGS. 3 and 4.

The inner buffer member 60 shown in FIG. 3 is mainly formed by the inner wire mesh ring located inside the guide ring member 40, and is formed in the uneven shape to reinforce the elastic absorption function mainly for the compression deformation in the axial direction. Has

In addition, the outer buffer member 61 shown in FIG. 4 is mainly an outer wire mesh ring positioned outside the guide ring member 40, and the outer retainer member 30 positioned outside the guide ring member 40 and the outer retainer member 30. As an example, it is desirable to design such that the buffering capacity of the banding strain is improved when the bending strain is applied when the torsional strain is applied mainly by molding into an octagonal shape.

Meanwhile, the most important structural feature of the present invention is a bending angle control piece 70 extending in a horizontal cylindrical shape so as to be in contact with the inside of the outer buffer member 61 at the end of the guide ring member 40 as shown in the drawing. ) To install.

Therefore, the bending angle control piece 70 is controlled by the outer buffer member 61 when the bending angle control piece 70 flows in the bending direction, so that the displacement angle can be controlled and absorbed when a large engine motion or a force is received.

That is, the bending angle control piece 70 compresses the outer buffer member 61 when bending bending is applied and is controlled with respect to the displacement, so that the slide length of the guide ring member 40 is reduced, resulting in abrasion and friction noise. It can be reduced.

This is, for example, in the case of a product having a bending capacity of approximately 8 °, the conventional design at the time of bending had to absorb the displacement while sliding the guide member 40 by the length of 8 ° bending.

However, the present invention is to be able to absorb up to the limit within a certain displacement in addition to the buffer during the bending action.

According to the present invention as described above, the bending displacement is functionally minimized to minimize the influence on the engine, and the slide length of the guide ring member 40 flowing between the inner and outer buffer members 60 and 61 is shortened. It is a very useful design that can increase the durability of the product and the fatigue life of the entire exhaust pipe by reducing wear and friction noise.

Claims (2)

A tubular sleeve 10 connected to the exhaust gas from the engine side inwardly; An inner retainer member 20 coupled to the outside of the sleeve 10 toward the engine side, the rim 21 being bent at the end thereof in the circumferential direction; An outer retainer member (30) positioned outside the inner retainer member (20) and having an end coupled to the inner retainer member (20), and the inner end of which is extended toward the center; The guide retaining member 40 is divided between the inner retainer member 20 and the outer retainer member 30 to form a first pocket 41 and a second pocket 42, and is connected to the exhaust pipe. ; A bellows 50 which is fixed between the rim 21 of the inner retainer member 20 and the guide ring member 40 to maintain the airtightness of the exhaust gas and absorb the expansion and bending; A ring-shaped inner buffer member 60 and an outer buffer member 61 respectively filled in the first pocket 41 and the second pocket 42; For bending the vehicle exhaust pipe, characterized in that the bending angle control piece 70 is provided to be controlled to absorb the displacement angle by the outer buffer member 61 when the bending and bending deformation to the end of the guide ring member 40 Decoupler. The decoupler for vehicle exhaust pipe according to claim 1, wherein the sleeve (10) is installed on the engine side and the exhaust pipe side, respectively.