KR100375700B1 - Exhaust Decoupler System - Google Patents

Abstract

The present invention relates to a connector for an automobile exhaust pipe, and the bellows (10) that the corrugated wrinkles of the hollow cylindrical shape is repeated; A cover member 20 surrounding the outside of the bellows 10; An inner retainer member (30) fixed to the other end of the bellows (10) and positioned outward of the bellows (10) and having a bent portion at the rear of the body; An outer retainer member 40 fixed to one end of the bellows 10 and positioned outside the inner retainer member 30, the outer retainer member 40 having a bent shape; A first shock absorbing member (51) assembled in contact with the outer retainer inner surface; A second buffer member 52 positioned at the bent portion of the inner retainer member 30; A guide ring member (60) fixed to one side of the cover member (20) and positioned between the buffer members (50) to guide a displacement in a bending direction in a predetermined form; In the bellows (10) member consisting of a damping member 100 is fixed at both ends inside,

Interlock consisting of an assembly of the ring 121 to maintain the shape of the diameter and the interlock 120 is formed in a spiral groove is formed spirally wound and spirally wound into the bellows 10 to the damping member 100 By mounting the ring subassembly, it is possible to absorb the impact by friction while sliding mutually with respect to the shaft or the bending displacement, thereby extending the life of the exhaust system and improving the riding comfort.

In addition, since the damping member 100 maintains a constant space of a passage through which the exhaust gas passes, the damping member 100 may prevent back pressure generated while the passage is narrowed.

And, by adjusting the thickness of the ring 121 or the belt 111, 112 for fixing the damping member 100 can be inserted into the insertion pipe having a different outer diameter, which can increase the range of use of the product will be.

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

Description

Connector for Automobile Exhaust Pipe {Exhaust Decoupler System}

The present invention relates to a connector for automobile exhaust pipe, and more particularly, to effectively absorb vibration caused by displacement in the axial direction or the bending direction, and to prevent back pressure generated when exhaust gas is discharged. It is intended to be extended.

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 the connection portion of the exhaust pipe is a rigid and compact product for absorbing and cushioning vibration displacement, impact load, and thermal deformation. (Exhaust Decoupler System) is installed.

There are several known types of such exhaust pipe connectors, but as shown in FIG. 1, a bellows in which a corrugated corrugation is repeatedly formed in a hollow cylinder, a cover member covering the outside of the bellows, and the bellows Inner retainer member fixed to the other end and positioned outward of the bellows, and fixed to one end of the bellows, which is fixed to one end of the bellows at the rear of the body, and is bent to the outside of the inner retainer member. An outer retainer member having a shape, a first buffer member assembled to contact the outer retainer inner surface, a second buffer member positioned at a bent portion of the inner retainer member, and fixed to one side of the cover member A guide ring member and the bell which are positioned between the shock absorbing members to guide the displacement of the bending direction in a predetermined shape. It is fixed on one side of the inner Woods, protect the bellows, and may be comprised of an inner sleeve (Inner sleeve) of the tubular to be connected to the high-temperature exhaust gas passing through the interior being commonly used.

Therefore, the shock absorbing members and the bellows absorb the bending displacement in the state where the expansion and contraction in the longitudinal direction and the central axis angle before and after the exhaust pipe connection cross from the vibration of the engine or the impact generated during driving.

According to this structure, the inner sleeve mounted inside the bellows is fixed only to the front side or the front and rear sides are fixed separately so as to reduce the deterioration of the bellows from the hot exhaust gas and to guide the flow of the gas constantly. There was a closure that could not play a damping role.

In addition, due to the structure of the inner sleeve there was a problem that can not expect a damping effect by itself.

Therefore, the performance of the exhaust pipe connector is reduced as a whole, and there are limitations such as the scope of application and the vehicle model.

According to Japanese Patent Laid-Open No. 11-93657 of the conventional connector configured as described above, the stopper function is maintained by the outer cover member during the pulling motion, but the compression should be maintained by the reaction force of the bellows and the coil spring member outside the bellows. The force generated from the engine motion compressing the exhaust system or the vibration system of the exhaust system may be stronger than the strength of the bellows and the coil spring member.

In this case, in particular, when the axial or bending displacement of the exhaust system is input, the inner sleeves mounted on the inner side of the bellows slide together to cause friction, so that the damping effect is absorbed by the banding, but the damping effect of the inner sleeve is structural. Since it does not occur, the durability is eventually reduced, and the vibration absorbing and noise reduction effects of the automobile are reduced.

In addition, since the inner sleeve narrows a passage through which the exhaust gas passes, there was a problem that back pressure may occur.

An object of the present invention is to provide a damping effect inside the bellows to effectively absorb the axial or bending displacement generated from engine vibration and road vibration even in an adverse mounting environment due to the structure of the exhaust pipe is narrow, exhaust system durability and ride comfort It is to provide a connector for an automotive exhaust pipe to improve.

It is another object of the present invention to provide a connector for an automobile exhaust pipe that can smoothly discharge the exhaust gas by preventing the back pressure caused by the narrow passage of the exhaust gas.

Still another object of the present invention is to provide a connector for an automobile exhaust pipe that can improve the reliability and productability of a product.

1 is a half sectional view showing a conventional invention.

2 to 6 are half-sectional views of the use state showing another embodiment of the present invention.

7 to 9 are partially cutaway sectional views showing the damping member of the present invention.

* Description of Major Symbols in Drawings *

10-Bellows 20-Cover member

30-inner retainer member 40-outer retainer member

50-buffer member 51-first buffer member

52-2nd shock absorber 60-guide ring

100-damping member 110-inner braid

111-Inner Belt 112-Outer Belt

120-Interlock 121-Ring

122-inner sleeve

The object of the present invention is a hollow bellows (10) and the bellows of the corrugation is repeatedly molded;

A cover member 20 surrounding the outside of the bellows 10;

An inner retainer member (30) fixed to the other end of the bellows (10) and positioned outward of the bellows (10) and having a bent portion at the rear of the body;

An outer retainer member 40 fixed to one end of the bellows 10 and positioned outside the inner retainer member 30, the outer retainer member 40 having a bent shape;

A first shock absorbing member 51 which is assembled in contact with the inner surface of the outer retainer 40;

A second buffer member 52 positioned at the bent portion of the inner retainer member 30;

A guide ring member (60) fixed to one side of the cover member (20) and positioned between the buffer members (50) to guide a displacement in a bending direction in a predetermined form;

The damping member 100 is fixed to both ends of the bellows 10 inside the member; The damping member 100 is spirally wound in a state where a predetermined gap is maintained inside the bellows 10. This is achieved by mounting an interlock ring subassembly consisting of an assembly of a grooved interlock 120 and an assembly of rings 121 that maintain the shape of the diameter.

That is, the damping member 100 composed of the interlock 20 which slides inside the bellows 10 member to induce friction and the ring 121 which fixes the interlock 20 is fixed to the front, rear, and both ends thereof. Therefore, when the axial or bending displacement is applied due to the vibration of the engine or the impact of the road surface while driving, a damping effect is generated to effectively absorb the displacement.

Therefore, the durability, ride comfort and reliability of the product can be improved.

When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention.

1 is a half sectional view showing a conventional invention, and shows a state in which the inner sleeve 122 is fixed only to the front side inside the bellows 10.

2 to 6 show each embodiment in which the damping member 100 for generating the damping effect according to the present invention is mounted in half cross section.

FIG. 7 illustrates an inner braid sub assembly, which is a damping member 100 mounted in FIG. 2.

FIG. 8 shows an interlock ring subassembly assembled with a ring and interlock mounted in FIG. 5.

FIG. 9 illustrates an interlock-inner sleeve sub assembly in which an inner sleeve and an interlock are mounted in FIG. 6.

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

As shown in FIGS. 2 to 6, the bellows 10 of the connector for the automobile exhaust pipe of the present invention absorbs the displacement in the stretching direction to the bending direction, prevents the leakage of the exhaust gas, and expands and contracts the bending. Absorbs.

In addition, the bellows 10 is to be restored when the external force is removed after absorbing the displacement in the longitudinal direction and the bending direction mainly because the wrinkle is repeatedly molded as shown in the figure.

In addition, an inner retainer member 30 having a shape bent toward the rear of the body is fixed to an outer side of one side end of the bellows 10.

In addition, the outer retainer member 40 whose end is bent backward is fixed to the outer side of the fixed end of the inner retainer member 30.

On the other hand, between the inner retainer member 30 and the outer retainer member 40 is a guide ring 60 member is fixed to the cover member 20 surrounding the outside of the bellows 10 by circumferential welding, the inner A second shock absorbing member 52 is provided to contact the outer surface of the bent portion of the retainer member 30 and the inner surface of the guide ring 60 member, and the inner surface of the outer retainer member 40 and the guide ring ( 60) The first buffer member 51 is provided in contact with the outer surface.

In addition, the guide ring 60 is formed with a predetermined arc, and when an axial or bending displacement of the exhaust system is input, the guide ring 60 is slid between the first buffer member 51 and the second buffer member 52 to absorb the displacement. Will be done.

Accordingly, the first and second buffer members are compressed in any direction and semi-permanently have the elasticity to be restored again, and in view of the more easily formed properties, compresses a mesh woven from a thin wire into a ring shape. Preference is given to using molded wire mesh rings.

At this time, the contact surface of the first and second buffer members in the present invention, because the friction is repeated a number of times when bending, the graphite is suitable for the guide surface member 60 and the contact surface for smooth movement, reducing friction noise during sliding and prevention of wear Lubrication coating with appropriate surface treatment means such as coating or insulation coating is also included.

In addition, as shown in FIG. 2, both ends of the bellows 10 are inner with the outer belt 112 to maintain the shape of the diameter so as to absorb the axial or bending displacement due to the vibration of the engine or the impact of the road surface during driving. An inner braid subassembly composed of inner braids 110 welded between the belts 111 may be mounted.

On the other hand, the inner braid 110 is formed by braiding a hollow tubular shape with a thin wire member of a metal that is resistant to heat.

Therefore, when subjected to an axial or bending displacement, friction occurs between the two-ply wire braiding network to generate a damping effect, and the bellows 10 is formed in a hollow tubular shape inside the bellows 10 to corrugate the bellows when the exhaust gas passes. 10) it is possible to prevent the generation of exhaust resistance or exhaust noise.

In addition, when the damping effect of the inner braid subassembly is not necessary, in order to fix only one side as shown in FIG. 3, the outer belt 112 on the other side may be removed and only the inner belt 111 may be mounted.

Then, as shown in FIG. 4, the outer belt 112 and the inner belt 111 on one side are removed, and the spot braid is prevented from being loosened by direct spot welding, and the braided wires are interconnected by performing a plurality of spot welding. Therefore, it is possible to keep the constant flow of exhaust gas at all times by suppressing the deformation of the shape due to thermal contraction and thermal expansion.

Meanwhile, in the present invention, as the damping member 100, an interlock ring subassembly composed of an assembly of the interlock 120 and the ring 121 is used as shown in FIG.

The interlock 120 is positioned in a state where a predetermined gap is maintained inside the bellows 10 and is spirally wound to form a spiral groove, and both ends thereof are fixed by a ring 121 that maintains a diameter shape.

Therefore, a damping effect is generated by friction between the interlocks 120 wound in a spiral when subjected to axial or bending displacement.

In this case, the damping efficiency can be changed by changing the molding conditions of the interlock 120 to adjust the friction force between the interlocks 120.

In addition, the interlock ring subassembly may be transformed into an interlock sleeve assembly assembled by fixing the inner sleeve 122 at both ends instead of the ring 121 as shown in FIG. 6.

That is, the interlock 120 is damped as described above, and the inner sleeve 122 fixed at both ends has a tubular shape and reduces the deterioration of the bellows 10 from the exhaust gas, and makes the gas flow constant. You will be guided.

In addition, the various damping members 100 may suppress the occurrence of turbulence by maintaining a constant space of a passage through which the exhaust gas passes.

In addition, when the present invention is fitted in the insertion pipe having a different outer diameter, all the members by adjusting the thickness of the ring 121 or the belt 111, 112 to maintain the diameter of the damping member 100 is used It can be applied by changing the inner diameter of both front and rear ends without changing their design.

According to the configuration of the present invention, the damping member 100 composed of the interlock 20 positioned inside the bellows 10 and the ring 121 for fixing the interlock 20 is fixed at both ends thereof to be axially or bent. Since the friction can be absorbed by mutually sliding against displacement, the life of the exhaust system can be extended and the riding comfort can be improved.

In addition, since the damping member 100 maintains a constant space of a passage through which the exhaust gas passes, the damping member 100 may prevent back pressure and eddy current generated while the passage is narrowed.

And, by adjusting the thickness of the ring 121 or the belt 111, 112 for fixing the damping member 100 can be inserted into the insertion pipe having a different outer diameter, which can increase the range of use of the product will be.

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

Claims (4)

delete delete A bellows 10 in which a corrugated wrinkle is formed in a hollow cylindrical shape; A cover member 20 surrounding the outside of the bellows 10; An inner retainer member (30) fixed to the other end of the bellows (10) and positioned outward of the bellows (10) and having a bent portion at the rear of the body; An outer retainer member 40 fixed to one end of the bellows 10 and positioned outside the inner retainer member 30, the outer retainer member 40 having a bent shape; A first shock absorbing member (51) assembled in contact with the outer retainer inner surface; A second buffer member 52 positioned at the bent portion of the inner retainer member 30; A guide ring member (60) fixed to one side of the cover member (20) and positioned between the buffer members (50) to guide a displacement in a bending direction in a predetermined form; It consists of a damping member (100) is fixed at both ends inside the bellows (10) member; Interlock consisting of an assembly of the ring 121 to maintain the shape of the diameter and the interlock 120 is formed in a spiral groove is formed spirally wound and spirally wound into the bellows 10 to the damping member 100 A connector for automobile exhaust pipe, characterized in that the ring sub-assembly is mounted. The method according to claim 3, wherein the damping member 100 is positioned in a state where a predetermined gap is maintained inside the bellows 10, and has a tubular shape with the interlock 120 spirally wound to form a spiral groove and bellows from the exhaust gas. A connector for an automobile exhaust pipe, characterized in that it is equipped with an interlock sleeve subassembly composed of an assembly of an inner sleeve (122) which reduces deterioration of (10) and constantly guides the flow of gas.