KR20020016273A - Exhaust decoupler system - Google Patents

Abstract

PURPOSE: A connector for an exhaust pipe of a vehicle is provided to improve the durability of a bellows and to reduce the external force and displacement applied to the bellows by inserting a mesh ring in between braid members. CONSTITUTION: An exhaust pipe connector comprises a metal bellows member(10) having corrugations, an outer braid member(20) braided in an obtuse angle to be flexibly deformed against a tensile force, an inner braid member(30) braided in an acute angle to slightly control a motion against the tensile force, a mesh ring(40) inserted in between the inner and outer braid members, a fixing cap(50) fitted in between the inner braid member and the bellows member to fix the inner and outer braid members on the outside of the bellows member, and a fixing belt(60) fitted to the outside of the fixing cap and fitted to the outer face of the outer braid member to fix the inner and outer braid members by welding. When an excessive external force is applied to the bellows member, the motion of the bellows member is restrained within an elastic range. Therefore, the deformation or breakage of the braid members and the bellows member is avoided.

Description

Automotive exhaust pipe connection {Exhaust decoupler system}

The present invention relates to a connector for an automotive exhaust pipe, and more particularly, inserting mesh rings between outer braids having different braid angles outside the bellows to improve durability of the bellows, and to apply excessive bellows to the bellows. It is invented to attenuate external forces and displacements.

In general, an exhaust pipe having a muffler is connected to an engine of a vehicle to discharge exhaust gas, and a connection port is installed at the connection portion to absorb and cushion vibration displacement, impact load, thermal deformation, and the like.

In addition, as described above, the connector connected to the exhaust pipe of the vehicle should absorb vibrations and displacements generated along the movement of the exhaust system from engine vibrations and road vibrations, which may be accompanied by excessive displacements generated in each direction such as tensile compression, bending, and torsion. Can be.

Therefore, metal bellows are mainly used to improve airtightness and vibration displacement absorbing ability, which are the core dynamics of automobile exhaust pipe connections.

On the other hand, as the connector of the same kind is known several types, US Patent No. 5145215 has been utilized as a connector of a relatively small structure.

According to the structure of this US patent exhaust pipe connector, the ends of the hollow cylindrical inner and outer sleeves connected to the engine side and the exhaust pipe side are bent oppositely to form a rim, which is an overlapping position of the inner and outer sleeves. Position the cushioning member between the rims.

In addition, the bellows are respectively fixed to both ends of the sleeves to prevent leakage of the exhaust gas and to absorb displacement in the longitudinal direction.

In addition, both ends of the sleeve and the bellows are fixed to the outer end cap is attached to the outside, depending on the purpose of the configuration of the braid (braid) of the woven form wrapped around the outside of the bellows, the outside of the bellows member Both ends thereof in the state wrapped with the braid member are composed of a structure which is finished by spot welding after pressing in the circumferential direction together with the cap.

Therefore, one displacement portion that can be bent and stretched is formed at an overlapping approximately intermediate position of the separated sleeve, so that the longitudinal stretching displacement and the central axis angles of the exhaust pipe connector at the longitudinal direction intersect with the vibration of the engine or the impact generated during driving. The shock absorbing member located between the rim and the bellows surrounding the outside are absorbed by the bending displacement of the rim.

As mentioned above, the core role of the connector for the automobile exhaust pipe is mainly made of metal bellows having good airtightness and vibration displacement absorption ability, and the bellows itself is subject to great stress due to excessive displacement and the ability to control displacement or load by itself is reduced. .

Therefore, in order to maintain high durability in the elastic region in the angular direction with respect to the bellows, an outer braid is usually mounted to the outside of the bellows.

However, the single-layer outer braid, which is widely used at present, uses a mesh braided with stainless steel wire, so that it does not have excessive force or displacement in the tension and compression directions in stretch characteristics unless it is closely adhered to the outside of the bellows. There was a problem as a limiting means.

In addition, when the braid is in close contact with the bellows, the tensile force can be controlled, but there is no limit to the compression displacement, and there is a closed end in which the bellows wears and the durability decreases due to the close contact.

Therefore, since the structure and the coupling of the outer blade to protect the bellows is very important, in the Korean Utility Model Application No. 99-0000768 of the present application in order to prevent the deformation of the bellows when subjected to excessive external force in the double-layer outer blade Has proposed a flexible coupling for an automobile exhaust pipe to be assembled.

However, as described in the Korean Utility Model Application No. 99-0000768 of the present application, the outer braid is assembled with an outer outer braid braided at an obtuse angle and an inner outer braid braided at an acute angle, and is configured to surround the bellows. In this case, if the two-layer outer braid receives excessive compressive force more than it can absorb, the outer braid is deformed and the end of the service life of the connector for the automobile exhaust pipe is reduced.

In addition, since there is no special displacement control function in the shear direction, all external forces generated in the shear direction are absorbed by the double-layered outer braid, so that durability is lowered, and there is a closed end that reduces the vibration absorption and noise reduction effect of the vehicle.

Therefore, the problem that the exhaust pipe connector is easily broken and the life is shortened.

An object of the present invention is to insert a mesh ring between outer braids having different braid angles to the outside of the bellows to prevent excessive force or displacement in the direction of excessive tension and compression that cannot be absorbed by the outer braid. It is to provide a connector for an automobile exhaust pipe to be reduced.

Another object of the present invention is the damping that effectively absorbs the bending and vibration displacement generated from the engine vibration and road vibration even in the adverse installation environment of the displacement control function and the exhaust pipe structure is narrow in the installation direction of the shear pipe by inserting the mesh ring It is to provide a connector for an automotive exhaust pipe to improve the function.

It is still another object of the present invention to provide a connector for an automobile exhaust pipe that can improve the merchandise and reliability.

1 is a half sectional view showing the basic structure of the present invention.

Figure 2 is a half sectional view showing a state in which both ends of the mesh ring is fixed between the fixing cap and the belt in the basic structure of Figure 1 as an embodiment of the present invention.

3 to 4 are half sectional views showing a state in which a protective cover member is mounted as another embodiment of the present invention.

5 to 8 are half sectional views showing other embodiments of the gas guide means provided inside the bellows.

Explanation of symbols on main parts of drawing

10-Bellows member 20-Outer outer braid member

30-inner outer braid member 40-mesh ring

50-cap 60-cap belt

70-protective cover member 100- gas guide means

110-Inner Braid Member 111-Inner Braid Fixing Belt

120-interlock member 121-inner sleeve for interlock fixing

130-Inner sleeve member for gas guide 140-Damping ring

140-sleeve for fixing damping ring

An object of the present invention, the bellows member 10 of the metal material having a predetermined width and size, the corrugated wrinkles of the hollow cylindrical shape is repeatedly formed;

The outermost side of the bellows member 10 is positioned to be wrapped with a constant gap with the surface of the bellows member, is less deformed with respect to the displacement in the compression direction, elastically deformed with respect to the tensile force, obtuse angle ( An outer outer braid member 20 braided with;

The inner outer braid member 20 is placed inside the outer surface of the bellows member 10 while being kept in a predetermined gap and is wrapped, and has an acute angle so as to control less motion with respect to the tensile force. An inner outer braid member 30 which is braided with;

A mesh ring 40 inserted between the inner and outer outer braid members 20 and 30;

Fixing caps fitted to the inner outer braid member 30 and the bellows member 10 so that the inner and outer outer braid members 20 and 30 may be fixed to the outer side of the bellows member 10. 50) and;

Fixing belt which is fitted to the outer diameter of the outer outer braid member 20 so as to fix the inner and outer outer braids 20 and 30 fitted to the outer portion of the fixing cap 50 by welding ( 60).

Therefore, when the external force that is not absorbed by two layers of outer braids having different braid angles, that is, the displacement of the tensile and compressive forces acts as the bellows member 10, between the inner and outer outer braids 20 and 30, respectively. Is absorbed by the mesh ring 40 is inserted into it can further increase the overall allowable external force.

In addition, since all the external forces generated in the shear direction are also absorbed by the double layer outer braid and the mesh ring 40, it is possible to increase the displacement control function in the shear direction.

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

1 is a half sectional view showing a structure as a basic diagram of the present invention.

Figure 2 is a half sectional view showing a state in which both ends of the mesh ring fixed between the fixing cap and the belt in the basic structure of the present invention.

Figure 3 is a half sectional view showing a state in which the protective cover member is provided on one side of the outer outer blade in the basic structure of the present invention.

Figure 4 is a half sectional view showing a state in which the protective cover member is provided at both ends of the outer outer braid in the basic structure of the present invention.

5 is a half sectional view showing a state in which an inner blade is provided in the basic structure of the present invention.

6 is a half sectional view showing a state where an interlock member is provided in the basic structure of the present invention.

Figure 7 is a half cross-sectional view showing a state provided with a sleeve for the gas guide in the basic structure of the present invention.

8 is a half sectional view showing a state in which a damping ring is provided in the basic structure of the present invention.

That is, as shown in FIG. 1, the bellows member 10 having a predetermined width and size and having a hollow cylindrical shape is repeatedly formed in the corrugated tubular shape and absorbs the displacement in the axial direction to the bending direction. Restore when external force is removed.

In addition, the outer part of the bellows member 10, that is, the outermost part, is positioned to be wrapped while maintaining a constant gap with the surface of the bellows member 10, is less deformed with respect to the displacement in the compression direction, and has elasticity with respect to the tensile force. Obtuse angle The outer outer braid member 20 which is braided with) is positioned.

The outer outer braid member 20 has a relatively large obtuse angle ( The reason for the braiding is that a large external force applied to the bellows member 10, that is, when displacement due to the compression force, maintains a constant gap at the outer side of the bellows member 10 so as to control the motion against the compression force. While obtuse ( It is formed by).

In addition, the outer outer braid member 20 is located inside the outer surface of the bellows member 10 while being kept in a predetermined gap with a predetermined gap, so that the acute angle (to control the motion with respect to the tension force ( The inner outer braid member 30 is braided with a.

The inner outer braid member 30 is positioned inside the outer outer braid member 20 at a predetermined interval so that the space 21 is formed, and a large external force such as tension and compression generated in the exhaust system of the vehicle. It is positioned to control a small amount of motion of the bellows member 10 from the excessive tensile force.

In addition, the space 21 has semi-permanent characteristics of elasticity to be restored after being compressed in any direction, and a mesh ring 40 formed in a ring shape by compressing a mesh woven from a thin wire is typically Is inserted.

Therefore, since two outer braid members 20 and 30 are positioned on the outside and the inside, the damping effect is increased at the resonance point of the connector, thereby significantly reducing noise, and the resistance to the exhaust system torsion accompanying the connector. This improves the durability of the bellows member 10.

In addition, since the mesh ring 40 is inserted between the two layers of outer braid members 20 and 30, when the displacement of the external force, that is, the tension and the compressive force acts as the bellows member 10, the two layers of outer brave member 10. It is possible to increase the total allowable external force by absorbing the external force at the same time as the raid 20 and 30, and to increase the displacement control function in the shear direction by absorbing the external force generated in the shear direction.

Therefore, it is possible to improve the durability by protecting the bellows member 10 from deformation due to excessive external force.

On the other hand, since the mesh ring 40 has repeated frictions when bending and contacting surfaces between the two layers of outer braid members 20 and 30, graphite is appropriate for smooth movement, reduction of friction noise during sliding, and prevention of wear. Lubrication coating with appropriate surface treatment means such as coating or insulation coating is also included.

The inner outer braid member 30 and the bellows member 10 may be fixed to the outer portion of the bellows member 10 by the outer outer braid member 20 and the inner outer braid member 30. At the end of the) is fixed cap 50 is fitted is coupled.

The fixing cap 50 has the outer outer braid member 20 and the inner outer braid member 30 positioned at the outer side of the bellows member 10 at the outside of the body of the bellows member 10. At the same time, it also plays a role of a medium that does not adhere to the surface.

The outer belt of the fixing cap 50 is fixed to the bellows member 10 so that the outer outer braid member 20 and the inner outer braid member 30 can be fixed by welding. Is installed.

The fixing belt 60 may be fitted to the outer diameter of the outer outer braid member 20 and then fix each braid member to the outer portion of the bellows member 10 by welding.

That is, the outer outer braid member 20 and the inner outer braid member 30 positioned at a predetermined distance to the outer portion of the bellows member 10 are firmly positioned at the outer portion of the bellows member 10 and fixed. After the fixing cap 50 is fitted to the bellows member 10, the fixing cap 50 is fitted into the inner diameter of the inner outer braid member 30 to support each braid member that is sequentially stacked, and then tighten the circumferential direction. By using the fixing belt 60 having, the outer outer braid member 20 is brought into close contact with each other, and finally the braid member 10 can be fixed to the outer portion of the bellows member 10 by welding.

And, as shown in Figure 2, both ends of the mesh ring 40 is fixed between the fixing cap 50 and the fixing belt 60, the outer braid member 20, 30 consisting of two layers It is desirable to absorb the applied tensile and compressive displacement uniformly to prevent breakage occurring at both ends of the outer braid.

In addition, in order to prevent the outer outer braid member 20 from being exposed to the outside to corrode, the protective cover member 70 surrounds the outer outer braid member 20 as shown in FIGS. 3 to 4. It may be fixed to one side, or the protective cover member 70 is fixed to both ends, and the two protective cover members 70 are assembled by being spaced apart from each other at a predetermined interval in the center.

On the other hand, the inner portion of the bellows member 10 selectively controls the displacement within the elastic limit of the bellows member 10 while simultaneously absorbing deformation such as stretching and bending, and smoothly flows as a guide pipe of the exhaust gas, The gas guide means 100 may be installed to protect the bellows member 10 from the high temperature exhaust gas and to improve durability.

In addition, the inner braid member 110, the interlock member 120, the inner sleeve member 130, or the damping ring 140 may be selectively used as the gas guide means 100.

The inner braid member 110 uses a mesh braided with a stainless wire material as shown in FIG. 5, and is fixed to the inner braid member 10 by using an inner braid fixing belt 111. do.

That is, when the inner braid member 110 receives an axial or bending displacement, friction occurs between two layers of wire braiding nets when both ends are fixed, and a damping effect occurs when the inner braid member 110 is fixed at one end or both ends. It is installed inside the member 10 in a hollow tubular shape to prevent exhaust resistance or exhaust noise from being generated by the corrugated bellows member 10 when the exhaust gas passes, thereby improving durability of the bellows member 10. do.

In addition, the interlock member 120 is positioned in a state where a predetermined gap is maintained inside the bellows member 10 as shown in FIG. 6, and is wound in a spiral shape to mainly deform the longitudinal direction and the bending direction. Can be absorbed.

That is, a mesh ring 40 is inserted into the outer portion of the bellows member 10 between the outer outer braid member 20 and the inner outer braid member 30 so as to absorb or control displacement due to external force. Again, the bellows member 10 can be installed and used to selectively install the interlock member 120 to absorb the deformation in the longitudinal direction and the bending direction, thereby maximizing durability.

In addition, the interlock member 120 may be firmly fixed to the inside of the bellows member 10 by interconnecting the ring-shaped interlock fixing sleeve 121 with a medium.

This is because the other end of the interlock fixing sleeve 121 overlaps the bellows member 10 and the interlock member 120 by performing spot welding several places in a state where the other end of the interlock fixing sleeve 121 is bent to the inside of the interlock member 120. It is to keep them completely combined.

In addition, the gas guide means 100 to protect the bellows member 10, as shown in Figure 7, the inner sleeve member 130 for the tubular gas guide connected to the high temperature exhaust gas to pass through therein Can be installed and used.

The gas guide inner sleeve member 130 is formed to be bent to one side of the body and then overlapped with the end of the bellows member 10 to be fixed by spot welding, thereby increasing durability of the bellows member 10. It is.

In addition, the gas guide means 100 may be provided with a damping ring 140 to perform a damping function for absorbing the vibration displacement and the adjustment function for excessive compression and shear force as shown in FIG.

The damping ring 140 is installed by fixing both ends with a damping ring fixing sleeve 141 inside the bellows member 10, and the exhaust gas is guided by the damping ring fixing sleeve 141. Damping ring 140 is to protect the bellows by performing the above-mentioned function.

According to the configuration of the present invention as described above, obtuse angle ( Acute angle with the outer outer braid member 20 having The bellows member 10 is elastic when an excessive external force, i.e., a tension and compression force displacement, acting as the bellows member 10 cannot be absorbed by the two-layer outer braid composed of the inner outer braid member 30 having By controlling the movement within the area, by inserting the mesh ring 40 between the two-layer outer braid member 20, 30, it is possible to prevent deformation and breakage of the bellows member 10.

In addition, it is possible to increase the damping function that effectively absorbs the bending and vibration displacement generated from the engine vibration and road vibration even in a disadvantageous mounting environment due to the displacement control function occurring in the shear direction and the exhaust pipe structure.

Therefore, it is a very useful invention that can improve the marketability and reliability.

Claims (8)

A bellows member (10) of metal material having a predetermined width and size, and the corrugated corrugation of the hollow cylinder is repeatedly formed; The outermost side of the bellows member 10 is positioned to be wrapped with a constant gap with the surface of the bellows member 10, so as to be less deformed for displacement in the compression direction, elastically deformable for the tensile force, obtuse angle( An outer outer braid member 20 braided with; The inner outer braid member 20 is placed inside the outer surface of the bellows member 10 while being kept in a predetermined gap and is wrapped, and has an acute angle so as to control less motion with respect to the tensile force. An inner outer braid member 30 which is braided with; A mesh ring (40) inserted between the inner and outer outer braid members (20, 30); Fixing caps fitted to the inner outer braid member 30 and the bellows member 10 so that the inner and outer outer braid members 20 and 30 may be fixed to the outer side of the bellows member 10. 50) and; Fixing belt which is fitted to the outer diameter of the outer outer braid member 20 so as to fix the inner and outer outer braids 20 and 30 fitted to the outer portion of the fixing cap 50 by welding ( The connector for automobile exhaust pipe, characterized in that consisting of 60). 2. The connector of claim 1, wherein both ends of the mesh ring (40) are fixed between the fixing cap (50) and the fixing belt (60). The connector for automobile exhaust pipe according to claim 1, wherein a protective cover member (70) is fixed to one or both sides of the outer outer braid member (20) to surround the outer outer braid member (20). The method of claim 1, wherein the inner portion of the bellows member 10 selectively controls deformation within the elastic limit of the bellows member 10 while simultaneously absorbing deformation such as stretching and bending, and flows as a guide pipe of the exhaust gas. The connector for automobile exhaust pipe, characterized in that the gas guide means 100 to improve the durability, to protect the bellows member 10 from the high-temperature exhaust gas. 5. The connector of claim 4, wherein the inner guide member (110) is used as the gas guide means (100). 5. The connector for automobile exhaust pipe according to claim 4, wherein the gas guide means (100) uses an interlock member (120). 5. The connector for an automobile exhaust pipe according to claim 4, wherein the gas guide means (100) uses an inner sleeve member for gas guide. 5. The connector for automobile exhaust pipe according to claim 4, wherein a damping ring (140) is used as the gas guide means (100).