KR200243767Y1 - 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;

A pair of inner retainer members 20 and 21 coupled to the engine side and the exhaust pipe in a separated state, respectively, one side coupled to an outer side of the sleeve 10;

A bellows 30 fixed between the inner retainer members 20 and 21 to maintain the airtightness of the exhaust gas and to absorb expansion and bending;

An outer retainer member 40 positioned outside each of the inner retainer members 20 and 21 and surrounding the bellows 30;

Pockets 51 and 52 which form a space between the inner retainer member 20 and 21 and the outer retainer member 40;

Consisting of a ring-shaped buffer member (60) filled in the pocket (51) (52), respectively;

The pockets 51 and 52 have a hemispherical shape in which the inner retainer members 20 and 21 and the outer retainer member 40 are opened, respectively, so as to accommodate the ring-shaped buffer member 60 having a circular cross section therein. As a result, the peripheral member in contact with the buffer members 60 and 61 absorbs the bending displacement by the elasticity of the shock absorbing members 60 and 61 rather than the sliding method. The wear caused by friction can be minimized.

In addition, by absorbing the bending displacement functionally to minimize the impact on the engine, and the slide length of the members flowing between the inner and outer buffer members 60, 61, shortened the wear and friction noise to reduce the durability of the product It is a very useful design that can increase the fatigue life of the entire exhaust pipe.

Description

Exhaust decoupler system for automobile exhaust pipe

The present invention relates to a decoupler for an exhaust pipe of an automobile, and more particularly, among the various vibrations or load displacements generated between the engine and the exhaust machine, 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 a discontinuity such as 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 allows the connector itself to be absorbed in a large bending angle while being relatively small in structure, so that it can be easily installed in any vehicle type and conditions due to its proximity to the engine. Having to.

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.

Figure 3 is an enlarged view showing the motion state of the inner retainer when the subject innovation is banding action

4 is a perspective view showing the buffer members of the present invention

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 20,21-Inner Retainer Member

30-Bellows 40-Outer retainer member

51,52-Pocket 60,61-Shock Absorber

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

A pair of inner retainer members 20 and 21 coupled to the engine side and the exhaust pipe in a separated state, respectively, one side coupled to an outer side of the sleeve 10;

A bellows 30 fixed between the inner retainer members 20 and 21 to maintain the airtightness of the exhaust gas and to absorb expansion and bending;

An outer retainer member 40 positioned outside each of the inner retainer members 20 and 21 and surrounding the bellows 30;

Pockets 51 and 52 which form a space between the inner retainer member 20 and 21 and the outer retainer member 40;

Consisting of a ring-shaped buffer member (60) filled in the pocket (51) (52), respectively;

The pockets 51 and 52 are ring-shaped buffer members 60 and 61 having a hemispherical shape in which the inner retainer members 20 and 21 and the outer retainer member 40 are opened, respectively, having a circular cross section therein. It is achieved by constructing to accommodate.

Therefore, the inner retainer members 20 and 21 and the outer retainer member 40 buffer the member 60 when the pockets 51 and 52 forming the circular cross section are symmetrically formed in two places and the bending displacement is applied. The slide length in contact with 61 is shortened.

In addition, by absorbing the bending displacement functionally to minimize the impact on the engine, wear and friction of the inner retainer member 20, 21 and the outer retainer member 40 flowing around the buffer member (60) (61). By reducing the noise, the durability of the product and 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 automobile exhaust pipe of the present invention, each of the shock absorbing members 60 and 61 positioned in two pockets 51 and 52 symmetrically on both sides, respectively. The inner retainer members 20 and 21 and the outer retainer member 40 are symmetrically slid when they are formed and a bending displacement occurs.

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

3 shows an enlarged motion state of the inner retainers 20 and 21 when the bending action is performed, and shows that the inner retainers 20 and 21 elastically change as shown by the virtual line according to the displacement direction. have.

4 shows a ring-shaped buffer member 60 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 is coupled to the inner retainer member 20 by overlapping the inner retainer member 20 to the outside of the tubular sleeve 10 through which the exhaust gas passes from the engine side to the inside, and the inner retainer member of the other side ( 21 is connected to the exhaust pipe in the same shape as the inner liner member 20 connected to the engine side.

Both ends of the inner retainer members 20 and 21 are bent in a hemispherical shape to form the pockets 51 and 52, and the outer retainer member 40 also to form the pockets 51 and 52. Each is bent in a hemispherical shape so that the ring-shaped buffer members 60 and 61 are positioned therebetween.

At this time, the pockets 51 and 52 formed in the inner retainer members 20 and 21 and the outer retainer member 40 may flow to each other when both sides are opened and a bending displacement is applied as shown in FIGS. 1 and 2. To form a gap which can be formed, the ring-shaped buffer member 60, 61 shown in FIG.

When the hollow tubular sleeve 10 is positioned only on one side as shown in FIG. 1, the inner retainer member 21 is directly connected to the exhaust pipe.

The inner retainer members 20 and 21 are respectively located in a separated state so that the two are opposed to the engine side and the exhaust pipe in pairs, one side of which is coupled to the outside of the sleeve 10 and includes pockets 51 and 52. Are each bent into a semicircular cross-sectional shape for formation.

The inner retainer members 20 and 21 support the bellows 30 which absorbs the expansion and the bending while maintaining the airtightness of the exhaust gas.

The bellows 30 serves to absorb the displacement in the stretch direction to the bending direction, and to prevent the leakage of exhaust gas passing through the sleeve 10 and the inner retainer members 20 and 21. It is fixedly installed in the longitudinal direction between the retainer members 20 and 21.

The bellows 30 is repeatedly wrinkled as shown in the drawing so that the main body is mainly restored to absorb the displacement after the absorption in the longitudinal direction and the bending direction and the like when the external force is removed.

On the other hand, the method of attaching the bellows 30, as shown in Figs. 1 to 2, the front end is in close contact with the inner retainer member 20, 21, one side is positioned between the outer diameter of the sleeve 10 If the sleeve 10 is not installed at the other end, the sleeve 10 is in close contact with the inner diameter of the inner retainer member 21 and then fixedly attached by welding or pressing means, but is not necessarily limited thereto. All means for permanent fixation will be included.

In the straight pipe portion where the bellows 31 is not formed, a stepped portion 31 is formed in the middle, as shown in the drawing, so that the end is formed into an expanded pipe shape so that the insertion length of the exhaust pipe can be kept constant. Good to do.

On the other hand, the outer retainer member 40 is located on each outer side of the inner retainer member 20, 21, respectively.

The outer retainer member 40 is bent in a hemispherical shape in a direction facing each other for the formation of pockets 51 and 52 positioned at the connection portions of the inner retainer members 20 and 21 in a tubular shape having both sides open. Then, the buffer member 60, 61 is positioned.

Wherein the outer retainer member 40 is molded in a shape that is consistent with the outer surface of the buffer member 60, 61 as shown in Figure 3, the inner inner retainer member 20, 21 is the buffer member 60 It is preferable to bend to a radius slightly larger than the radius of the buffer member (60, 61) so that the (61) can flow somewhat.

Therefore, when the bending deformation is applied, the inner liner members 20 and 21 coupled to the free ends of the bellows 30 at both ends of the bellows 30 are somewhat elastically deformed as shown in the imaginary line in FIG. 60) (61) is elastically deformed by the absorbing power of itself, it is possible to cushion, control the bending displacement.

The sleeve 10 has a short tubular shape and guides the exhaust gas to penetrate the inside thereof, thereby protecting the bellows 30 and preventing noise caused by the airflow sound of the gas.

The buffer members 60 and 61 are respectively filled in the pockets 51 and 52 to elastically absorb the longitudinal displacement and the bending displacement along with the impact from the vibration of the engine or the road surface vibration during driving. It is elastic material to make.

The shock absorbing members 60 and 61 are formed in a ring shape having a circular cross section, and the material is semi-permanently having elasticity to be restored after being compressed in any direction, and in view of easier molding. In general, the mesh woven into a thin wire is compressed to form a ring.

At this time, in the present invention, it is also preferable to perform a lubrication coating treatment on the contact surfaces of the buffer members 60 and 61 by smooth graphite or other suitable surface treatment means.

Therefore, this structure also enables the self-supporting function of the exhaust pipe.

In this way, the buffer members 60 and 61 are symmetrically installed in the pockets 51 and 52 on both sides, respectively, so that the displacement absorbing portions are operated at two positions when the displacement in the bending direction is applied, thereby further improving the bending displacement ability. The inner retainer members 20 and 21 in contact with the buffer members 60 and 61 and the pockets 51 and 52 of the outer retainer member 40 can reduce wear and friction noise due to a reduction in sliding length. .

That 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 a displacement by sliding one member by a length of 8 ° bending.

However, in the present invention, each can be absorbed by 4 ° on each side.

The present invention as a result of the peripheral member in contact with the buffer member 60, 61 absorbs the bending displacement by the elasticity of the shock absorbing member 60, 61, rather than the slide method, between each member during the bending action It is possible to minimize the wear caused by friction.

At this time, by adjusting the density of the buffer member (60, 61) it is possible to adjust the overall displacement absorption capacity of the product.

According to the present invention as described above, as a result of the bending action as a result of the peripheral member in contact with the buffer member (60) 61 absorbs the bending displacement by the elasticity of the buffer member (60) (61) rather than the slide method. It is to minimize wear caused by friction between the members.

In addition, it is a very useful design to increase the durability of the product and the fatigue life of the entire exhaust pipe by functionally absorbing the bending displacement to minimize the effect on the engine, reducing wear and friction noise.

Claims (2)

A tubular sleeve 10 connected to the exhaust gas from the engine side inwardly; A pair of inner retainer members 20 and 21 coupled to the engine side and the exhaust pipe in a separated state, respectively, one side coupled to an outer side of the sleeve 10; A bellows 30 fixed between the inner retainer members 20 and 21 to maintain the airtightness of the exhaust gas and to absorb expansion and bending; An outer retainer member 40 positioned outside each of the inner retainer members 20 and 21 and surrounding the bellows 30; Pockets 51 and 52 which form a space between the inner retainer member 20 and 21 and the outer retainer member 40; Consisting of ring-shaped buffer members (60, 61) respectively filled in the pockets (51) (52); The pockets 51 and 52 are ring-shaped buffer members 60 and 61 having a hemispherical shape in which the inner retainer members 20 and 21 and the outer retainer member 40 are opened, respectively, having a circular cross section therein. Decoupler for vehicle exhaust pipe, characterized in that configured to accommodate the. 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.