KR20010110032A - Flexible catalytic converter for exhaust pipe for automobiles - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible catalytic converter for an automobile exhaust pipe, having a predetermined width and size, installed in an underbody of an automobile, and having a space portion 11 formed inside the body. A suction port 12 is provided at one side and a housing 10 at which the discharge port 13 is located;

A catalyst member (20) positioned in the inner space (11) of the housing (10) and configured to purify the exhaust gas generated at the engine side by an oxidation or reduction action;

Located in the inlet 12 of the housing 10, the rear surface of the body is provided with a contact surface 31, the guide to smooth the bending motion while selectively sliding during the bending displacement generated from the engine vibration and road surface vibration Member 30;

The inner space 11 of the housing 10 is provided at a predetermined interval toward the rear side of the guide member 30 to prevent leakage of the exhaust gas, the diaphragm having a fixed surface 41 is formed at the end of the body A support bracket 40;

A bellows (50) positioned below the guide member (30) and the diaphragm support bracket (40) to maintain the airtightness of the exhaust gas generated from the engine side, and to absorb expansion and bending;

A first shock absorbing member (60) positioned in close contact with the guide member (30) inside the inlet (12) of the housing (10) to induce buffering and bending of the guide member (30);

Located on the inner front side of the bellows 50 to smoothly guide the flow of the exhaust gas, protect the bellows 50 from the hot exhaust gas, the fixing portion 71 is formed stepped downward at the rear end of the body A front sleeve member 70;

Located in the rear side of the front sleeve member 70, the body front portion and the rear sleeve member 80 is formed with a guide surface 81 having a predetermined curvature in the upper portion of the fixing portion 71 of the front sleeve member 70 and ;

It is installed on the fixing portion 71 of the front sleeve member 70 and is grounded with the guide surface 81 of the rear sleeve member 80, to maintain the cushioning and smooth bending when the compression displacement occurs, the durability of the bellows (50) Since it is composed of a second shock absorbing member 90 for improving, the flexible catalytic converter for automobile exhaust pipe of the present invention has a second shock absorber between the rear side of the front sleeve member 70 inside the bellows 50 and the front of the rear sleeve member 80. By forming the member 90, it is a very useful invention that can improve the durability of the bellows (50) by maintaining a smooth bending in the event of a compression displacement and bending displacement occurs.

Description

Flexible Catalytic Converter for Automotive Exhaust Pipes {FLEXIBLE CATALYTIC CONVERTER FOR EXHAUST PIPE FOR AUTOMOBILES}

The present invention relates to a flexible catalytic converter for an automobile exhaust pipe, and more particularly, has a meshing ring having a predetermined curvature between the bellows inner front sleeve and the rear sleeve, and is capable of cushioning even in the event of compression displacement and maintaining smooth bending. While it is invented to improve the durability of the bellows.

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 to discharge exhaust gas, and a coupling pipe decoupling element is provided at 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 yet compact product capable of self supporting the entire exhaust pipe with a small number of hanger mountings.

Therefore, the flexible coupling installed in the vehicle exhaust pipe absorbs displacement from the engine and road vibration while driving the vehicle, thereby improving ride comfort and fatigue life of the exhaust system, thereby improving durability.

Meanwhile, a catalytic converter, which is a three-way catalyst installed in an exhaust pipe of an automobile, is a kind of exhaust gas purifier for minimizing harmful gas emitted to the atmosphere.

In other words, it is a device that oxidizes or reduces harmful CO (carbon monoxide), HC (hydrocarbon), NOx (nitrogen oxide) contained in exhaust gas of an engine using petroleum as fuel by using a catalyst.

In addition, platinum (Pt), palladium (Pd), rhodium (Rh) and the like are used as components used as a catalyst in the catalytic converter.

In addition, a commonly used catalytic converter is formed to have a predetermined size, and both sides are provided with a suction port and a discharge port, and a space is formed inside the housing, and the inside of the housing is disposed, and harmful gas discharged to the atmosphere. It is largely composed of a catalyst member for purifying by the oxidation or reduction reaction, and a mat member which is located on the outer side of the catalyst member, to prevent the flow of the catalyst member and to perform a buffer and adiabatic action.

On the other hand, as proposed by the present applicant (Korean Utility Model Registration Application No. 2000-13769) previously applied by the present applicant is installed on one side or both sides of the catalyst cover (1) of the catalytic converter, respectively, the buffer and the bending of the guide member (2) Products have been proposed to form a shock absorbing member (3) to induce.

In addition, a coil spring 5 is installed and used between the guide member 2 and the diaphragm support bracket 4 so that the guide member 2 can be closely attached to the buffer member 3.

The conventional flexible coupling and the catalytic converter configured as described above can maintain the function of bending and tension caused by engine vibration exhaust pipe vibration, but the compression strength of the coil spring member located outside the bellows is weak due to the compression displacement. Since it is compressed by receiving a large displacement, there is a problem that a space is generated between the buffer member (wire mesh ring) and the bending guide member.

In addition, due to the reduction in the compressive strength of the coil spring during excessive compression, there was a closed end of the bellows durability.

An object of the present invention is to provide a meshing ring having a predetermined curvature between the inner and inner sleeves of the bellows to cushion the compression displacement and to improve the durability of the bellows while maintaining smooth bending. To provide a flexible catalytic converter.

Another object of the present invention is to provide a flexible catalytic converter for an automobile exhaust pipe that can improve the reliability and productability of the product.

1 is a plan sectional view showing an internal shape of a flexible catalytic converter for an automobile exhaust pipe according to the present invention.

Figure 2 is a cross-sectional view showing a displacement absorption state of the flexible catalytic converter for automobile exhaust pipe of the present invention when the bending displacement occurs.

Figure 3 is a plan sectional view showing one embodiment of the present invention.

Figure 4 is a partially cut perspective view showing the shape of a conventional catalytic converter.

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

10-housing 11-space

12-Inlet 13-Outlet

20-Catalyst 21-Mat

30-guide member 31-contact surface

40-diaphragm support bracket 41-fixed surface

50-Bellows 60-First Shock Absorber

61-Meshing 62-Guideway

70-front sleeve member 71-fixing part

80-rear sleeve member 81-guide surface

82-Expansion part 90-Second buffer member

100-Cover member 110-Supporting jaw

R-radius of curvature R1-radius of curvature

C-exercise point

The object of the present invention, having a predetermined width and size, is installed in the underbody of the vehicle, the space portion 11 is formed inside the body, the suction port 12 on one side of the space portion 11 Is provided, the other side and the housing 10 in which the discharge port 13 is located;

A catalyst member (20) positioned in the inner space (11) of the housing (10) and configured to purify the exhaust gas generated at the engine side by an oxidation or reduction action;

Located in the inlet 12 of the housing 10, the rear surface of the body is provided with a contact surface 31, the guide to smooth the bending motion while selectively sliding during the bending displacement generated from the engine vibration and road surface vibration Member 30;

The inner space 11 of the housing 10 is provided at a predetermined interval toward the rear side of the guide member 30 to prevent leakage of the exhaust gas, the diaphragm having a fixed surface 41 is formed at the end of the body A support bracket 40;

A bellows (50) positioned below the guide member (30) and the diaphragm support bracket (40) to maintain the airtightness of the exhaust gas generated from the engine side, and to absorb expansion and bending;

A first shock absorbing member (60) positioned in close contact with the guide member (30) inside the inlet (12) of the housing (10) to induce buffering and bending of the guide member (30);

Located on the inner front side of the bellows 50 to smoothly guide the flow of the exhaust gas, protect the bellows 50 from the hot exhaust gas, the fixing portion 71 is formed stepped downward at the rear end of the body A front sleeve member 70;

The rear sleeve member 80 is positioned to the rear side of the front sleeve member 70 and has a guide surface 81 having a predetermined curvature on an upper portion of the fixing portion 71 of the front sleeve member 70. Wow;

It is installed on the fixing portion 71 of the front sleeve member 70 and is grounded with the guide surface 81 of the rear sleeve member 80, to maintain the cushioning and smooth bending when the compression displacement occurs, the durability of the bellows (50) It is achieved by consisting of a second buffer member 90 to improve.

Accordingly, the inventors of the present invention provide a flexible catalytic converter for a vehicle exhaust pipe to maintain smooth bending during compression displacement and bending displacement, thereby improving durability of the bellows 50, and thus, after the front sleeve member 70 inside the bellows 50. By forming the second buffer member 90 between the side portion and the front of the rear sleeve member 80, it is possible to improve the durability of the bellows (50).

That is, the second shock absorbing member 90 having a predetermined curvature is mounted on the fixing portion 71 of the front sleeve member 70 formed to be bent downward at the rear end of the body, and then the front of the rear sleeve member 80. Positioned so as to be grounded with the guide surface 81, the compression displacement is generated while the guide surface 81 of the second shock absorbing member 90 and the rear sleeve member 80 slides within a predetermined angle while the compression displacement occurs, It can be buffered to induce smooth bending.

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

1 is a plan sectional view showing an internal shape of a flexible catalytic converter for an automobile exhaust pipe according to the present invention.

Figure 2 is a cross-sectional view showing a displacement absorption state of the flexible catalytic converter for automobile exhaust pipe of the present invention when the bending displacement occurs.

Figure 3 shows one embodiment of the present invention in a plan sectional view.

That is, as shown in FIGS. 1 to 3, the housing 10 of the flexible catalytic converter for automobile exhaust pipe according to the present invention has a space 11 formed inside the body, and a suction port is formed at one side of the space 11. 12 is provided, and the discharge port 13 is located on the other side.

In addition, a support jaw at an end portion of the inlet 12 of the housing 10 may perform bending and a buffering action in a state in which the first shock absorbing member 60, which will be described later, is grounded with the guide member 30. A cover member 100 provided with 110 is formed.

The cover member 100 may be formed by integrally extending the housing 10 body from the body front portion of the housing 10 or by forming a separate cover member 100.

As a result, the cover member 100 formed on the front surface of the suction port 12 of the housing 10 is in close contact with the guide member 30 while the first buffer member 60 is firmly supported at the corner of the support jaw 110. The guide member 30 is in close contact with the first shock absorbing member 60 during the bending displacement in the closed state to induce the bending motion.

In addition, the cover member 100 may perform the role of fixing the first shock absorbing member 60 positioned inward and protecting all the internal element members from the outside.

In addition, the first buffer member 60 tightly fixed to the inner support jaw 110 of the cover member 100 has a smooth bending between the guide member 30 and the cover member 100 and the guide member 30. It serves to induce, the mesh ring 61 is used as the first buffer member (60).

The reason why the mesh ring 61 is used as the first shock absorbing member 60 is that it is semi-permanent to have the elasticity to be restored after being compressed in any direction, and is made of a thin wire in consideration of the easier molding. The mesh ring 61 for compressing the net body and forming a ring shape is used.

In addition, the guide member (30) on one side of the bottom surface of the body of the first buffer member 60 so that the guide member 30 can be selectively slid in the surface contact state in close contact with the contact surface 31 of the guide member (30). A guide surface 62 is formed with a radius of curvature R corresponding to the contact surface 31 of 30.

Therefore, the mesh ring 61 used as the first shock absorbing member 60 is in contact with the guide member 30 in a state of being closely fixed to the inner supporting jaw 110 of the cover member 100, and thus guides when bending displacement occurs. The member 30 slides and serves to cushion and absorb the bending displacement.

Therefore, the contact surface 31 of the guide member 30 is repeated a number of friction during bending, so as to improve the durability by appropriate surface treatment means, such as appropriate graphite coating or insulation coating for reducing the friction noise when sliding, prevention of wear Lubrication coating is preferred.

On the other hand, in the inner space 11 of the housing 10, the catalyst member 20 for purifying the exhaust gas generated from the engine side by the oxidation or reduction action is located.

The catalyst member 20 serves to oxidize or reduce carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NO _Z ) contained in exhaust gas.

In addition, a mat 21 is installed outside the catalyst member 20 to prevent flow and breakage of the catalyst member 20 between the housing 10 and the catalyst member 20.

That is, since the catalyst member 20 positioned at the center of the inner space 11 of the housing 10 is firmly positioned inside the housing 10 by the mat 21, the catalyst member 20 may be damaged due to flow. This can be prevented.

In addition, the mat 21 is preferably a wire mesh type or a mixture of asbestos and wire mesh for durability.

On the other hand, the inside of the inlet 12 of the housing 10 is provided with a guide member 30 for smoothing the bending motion while selectively sliding during the bending displacement generated from the engine vibration and the road surface vibration.

The guide member 30 has a predetermined radius of curvature R so as to induce a bending motion while sliding in a contact state at the time of bending displacement with the first buffer member 60, which will be described later, at the center portion of the body. ) Is formed.

That is, as shown in FIG. 1, when the bending displacement and tension occur due to the engine vibration and the exhaust pipe, the guide member 30 is in contact with the first shock absorbing member 60 and the guide surface 62 of the first shock absorbing member 60. The contact surface 31 of the guide member 30 and the slide in the state in contact with each other will be able to absorb and buffer the banding surface.

In addition, the rear plate of the guide member 30 is formed with a diaphragm support bracket 40 is formed with a fixed surface 41 at the end of the body at a predetermined interval.

The diaphragm support bracket 40 serves to isolate and protect the bellows 50 to be described later from the exhaust gas discharged at a high temperature, and prevents leakage of the exhaust gas.

On the other hand, the diaphragm support bracket 40 is formed at a predetermined interval with the guide member 30 is the reason why the mutually predetermined interval to ensure the angular range of movement that can be moved during the bending displacement of the bellows 50 It is formed.

In addition, a bellows 50 is installed below the guide member 30 and the diaphragm support bracket 40 to maintain the airtightness of the exhaust gas generated from the engine side and absorb the expansion and bending.

In addition, inside the bellows 50, the front sleeve member 70 and the rear smoothly guide the flow of the exhaust gas around the center of the bellows 50 and protect the bellows 50 from the high temperature exhaust gas. Sleeve member 80 is installed.

The front sleeve member 70 positioned at the inner front portion of the bellows 50 has a fixed portion 71 formed stepwise downward at the rear end of the body, and has a predetermined curvature rate R1 at the fixed portion 71. The second shock absorbing member 90 is mounted.

In addition, the material and configuration of the second shock absorbing member 90 may be applied in the same manner as the first shock absorbing member 60, and may be used in a bending displacement in a state of being mounted on the fixing part 71 of the front sleeve member 70. In order to smoothly absorb the displacement, the second shock absorbing member 90 is preferably mounted within a range not exceeding the outer diameter height of the front sleeve member 70.

That is, in order to be able to induce a smooth banding in the process of absorbing the bending displacement is grounded with the guide surface 81 of the rear sleeve member 80 to be described later.

On the other hand, the front of the body so as to absorb the bending displacement while the front sleeve member 70 slides in the grounded upper portion of the rear of the second buffer member 90 mounted to the rear of the body of the front sleeve member 70, The rear sleeve member 80 is provided with a guide surface 81 having a radius of curvature corresponding to the curvature R1 of the second buffer member 90.

Accordingly, the second shock absorbing member 90 is mounted to the rear side of the body of the front sleeve member 70, and the guide surface 81 of the rear sleeve member 80 is formed on the rear upper part of the second shock absorbing member 90. Since the second bending member 90 is grounded with the guide surface 81 of the rear sleeve member 80 when the bending displacement occurs, the second bending member 90 is grounded with the same curvature radius as that of the buffer member 90. It can be absorbed by inducing bending motion.

Therefore, when the bending displacement occurs as described above, the front sleeve member 70 can absorb the bending displacement while sliding on the guide surface 81 of the rear sleeve member 80 by the second shock absorbing member 90 mounted on the rear side. Therefore, by inducing the bending motion of the guide member 30 positioned as an upper portion of the front sleeve member 70 as a whole it is possible to absorb and cushion the bending displacement.

Meanwhile, when the bending displacement occurs as described above, the front sleeve member 70 is connected to the rear sleeve member 80 and the second shock absorbing member 90 based on the center of motion C of the bellows 50 as shown in FIG. 2. By sliding by the bending displacement can be absorbed within a predetermined angle (θ) range.

In addition, the predetermined angle θ, which is slid when the bending occurs between the front sleeve member 70 and the guide member 30 described above, is determined by the center of gravity C and the radius of curvature R according to the characteristics and the type of the product. It is preferable to adjust the product according to the nature of the product.

In addition, the reason for setting the bending center point as the center of motion (C) of the bellows 50 is to induce the bellows 50 in pure angular motion while inducing stress to the lowest to have long lifespan durability. It is set as follows.

In addition, an expansion pipe 82 is formed at the rear end of the rear sleeve member 80 to facilitate the flow of the exhaust gas.

That is, since the expansion portion 82 is formed to be opened to the rear end of the rear sleeve member 80 to the outside, the exhaust gas can be more easily moved in the direction of the catalyst member (20).

Meanwhile, as shown in FIG. 3, the flexible coupling installed at the front inlet 12 of the housing 10 of the catalytic converter to absorb and buffer the bending displacement may also be disposed at the outlet 13 of the housing 10. By installing at the same time, it is possible to increase the effect of buffering and absorbing displacement from engine and road vibration while driving a vehicle.

Accordingly, the inventors of the present invention provide a flexible catalytic converter for a vehicle exhaust pipe to maintain the cushioning and smooth bending when bending displacement occurs, thereby improving durability of the bellows 50, and the rear and rear portions of the front sleeve member 70 inside the bellows 50. By forming a second buffer member 90 between the front of the sleeve member 80, it is possible to improve the durability of the bellows (50).

That is, the second shock absorbing member 90 having a predetermined curvature is mounted on the fixing portion 71 of the front sleeve member 70 formed to be bent downward at the rear end of the body, and then the front of the rear sleeve member 80. Positioned so as to be grounded with the guide surface 81, the bending displacement is caused to slide within a predetermined angle while the guide surface 81 of the second buffer member 90 and the rear sleeve member 80 is grounded to each other when compression displacement occurs It can be buffered to induce smooth bending.

According to the present invention as described above, since the second cushioning member is installed between the bellows inner front sleeve member and the rear sleeve member of the catalytic converter, the displacement force is absorbed when the compression displacement occurs without installing a separate coil spring as in the prior art. It can improve the durability of bellows by inducing banding.

Therefore, it is a very useful invention that can improve the reliability and commerciality of the product.

Claims (5)

It has a predetermined width and size, is installed on the underbody of the vehicle, the space portion 11 is formed inside the body, one side of the space portion 11 is provided with a suction port 12, the other side A housing 10 in which the outlet 13 is located; A catalyst member (20) positioned in the inner space (11) of the housing (10) and configured to purify the exhaust gas generated at the engine side by an oxidation or reduction action; Located in the inlet 12 of the housing 10, the rear surface of the body is provided with a contact surface 31, the guide to smooth the bending motion while selectively sliding during the bending displacement generated from the engine vibration and road surface vibration Member 30; The inner space 11 of the housing 10 is provided at a predetermined interval toward the rear side of the guide member 30 to prevent leakage of the exhaust gas, the diaphragm having a fixed surface 41 is formed at the end of the body A support bracket 40; A bellows (50) positioned below the guide member (30) and the diaphragm support bracket (40) to maintain the airtightness of the exhaust gas generated from the engine side, and to absorb expansion and bending; A first shock absorbing member (60) positioned in close contact with the guide member (30) inside the inlet (12) of the housing (10) to induce buffering and bending of the guide member (30); Located in the inner front portion of the bellows 50 to smoothly guide the flow of the exhaust gas, protect the bellows 50 from the high temperature exhaust gas, the fixing portion 71 is formed stepped downward at the rear end of the body A front sleeve member 70; The rear sleeve member 80 is positioned to the rear side of the front sleeve member 70 and has a guide surface 81 having a predetermined curvature on an upper portion of the fixing portion 71 of the front sleeve member 70. Wow; It is installed on the fixing portion 71 of the front sleeve member 70 and is grounded with the guide surface 81 of the rear sleeve member 80, to maintain the cushioning and smooth bending when the compression displacement occurs, the durability of the bellows (50) Flexible catalytic converter for automobiles, characterized in that composed of a second buffer member 90 to improve. The method according to claim 1, wherein the flexible coupling is connected to the exhaust inlet 12 and the rear of the housing 10 of the catalytic converter so as to increase the effect of buffering and absorbing the displacement from the engine and road vibration while driving the vehicle. 13) Flexible catalytic converter for automobile exhaust pipe, characterized in that installed on each side. The method according to claim 1, wherein the rear end portion of the body of the rear sleeve member 80 is characterized in that the flexible pipe 82 for the exhaust pipe, characterized in that the expansion pipe 82 is formed to be opened to the outside in order to facilitate the flow of the exhaust gas more smoothly. Converter. The method of claim 1, wherein the lubricating coating layer is formed on the contact surface 31 of the guide member 30 in order to reduce the durability, friction noise, and abrasion due to friction with the first buffer member 60 during bending. Flexible Catalytic Converter for Automobile Exhaust Pipes. The method of claim 1, wherein the lubricating coating layer is formed inside the guide surface 81 of the rear sleeve member 80 to reduce durability due to friction with the second buffer member 90, reduce friction noise, and prevent abrasion. Flexible Catalytic Converter for Automobile Exhaust Pipe.