KR100457210B1 - Exhaust pipe decoupler for vehicles - Google Patents

Abstract

The present invention relates to a connector for an automobile exhaust pipe, the bellows member 10 of a metal material having a predetermined width and size and a hollow cylindrical shape repeatedly formed, and the surface of the bellows on the outermost side of the bellows member 10. The outer braid member 20 and the outer braid member 20 are braided at predetermined angles and fixed to both ends of the bellows member 10 and are respectively fixed to the outer surface of the bellows member 10 and the outer tube. It is located between the raid member 20 to prevent contact, and the end is bent to form a single layer, the retainer member 30 having a seating portion 31 and the seating portion 31 formed in the retainer member 30 The outer damper member 40 and the outer braid member 20 and the retainer member 30 mounted on the outer surface of the outer ring member 20 are fixed to the outer side of the bellows member 10. In the configuration consisting of a fixing cap 50 is fitted to the outer diameter of the rod member 20, the retainer member 30 is formed in the outer peripheral surface of the seating portion 31 formed so as to be monolayer with a predetermined groove ( 32 is formed, the end of the ring damper member 40 is formed in a shape corresponding to the coupling groove 32, the ring damper member 40 is fitted into the coupling groove 32 to be coupled to the coupling groove Both sides of the end of the ring damper member 40 are supported on the inner side of the 32 to interfere with each other, thereby increasing the resistance in the torsional direction.

In addition, when the engine vibration or road vibration and the displacement of the exhaust system cause excessive displacement generated in each direction such as tension compression, bending and torsion while driving the vehicle, the retainer member 30 and the ring damper member 40 contact each other. The area is adjusted by the coupling groove 32 to be able to elastically change the characteristics of the axial direction.

Therefore, durability can be improved even in the deformation and displacement of excessive external force generated during driving of the vehicle and applied to the bellows member 10.

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

Description

EXHAUST PIPE DECOUPLER FOR VEHICLES}

The present invention relates to a connector for an automobile exhaust pipe, and more particularly, to change the shape of a retainer member mounted in an exhaust pipe connector to support a ring damper member, thereby increasing the contact surface between the ring damper member and the retainer, thereby retaining the retainer member and the ring type. It is invented to increase the resistance in the torsion direction by interference with the damper member.

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 the connector for automobile exhaust pipe.

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 is fixed to the end cap is attached to the outside, depending on the purpose of the bellows in the form of woven wrap is configured to the outside of the bellows.

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 expansion displacement and the central axis angle before and after the exhaust pipe connection are intersected from the vibration of the engine or the impact generated during driving. The cushioning member located between the rim and the bellows surrounding the outside are absorbed by the bending displacement of the state.

On the other hand, as described above, the core role of the connector for the car exhaust pipe is mainly a metal bellows having good airtightness and vibration displacement absorbing capacity, the bellows itself is deteriorated the ability to control under a large stress due to excessive displacement.

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

However, the one-layer outer braid, which is widely used at present, uses a mesh braided with stainless steel wire, so that the elastic properties of the outer braid do not adhere to the outside of the bellows. There was a problem as a limiting means.

That is, when the outer braid is in close contact with the bellows, it is possible to control the tensile force, but not the compressive force.

Therefore, in order to solve the above problems, the present applicant is equipped with a ring-type damper member supported by a retainer member inside the outer braid in Patent Application No. 2000-050100 to control the motion due to excessive compressive force and shear force. I have suggested a conventional connector.

In addition, the retainer member 20 'mounted at both ends of the bellows is formed such that the end portion is bent and monolayered so that the ring-type damper member can be mounted, as shown in FIG.

However, in the retainer member, the outer circumferential surface of the seating portion, which is formed in a single layer by bending the end portion, is formed to have a predetermined width, so that the interference between the retainer member and the ring damper member does not occur in the torsion direction, and thus the characteristics of the retainer member cannot be changed elastically. , There is a problem in reducing the life of the bellows member by being vulnerable to the force in the torsion direction.

An object of the present invention is to provide a connector for an automotive exhaust pipe that can increase the resistance in the torsion direction by interference between the retainer member and the ring-type damper member by mounting the retainer member and the ring-type damper member in an uneven type.

Another object of the present invention is to provide a connector for an automobile exhaust pipe that can elastically change the characteristics of the axial direction by adjusting the contact area between the retainer member and the ring-shaped camper member.

Figure 1 is a perspective view showing a separate retainer member mounted on a connector for a conventional automobile exhaust pipe.

Figure 2 is a half sectional view showing the basic structure of the connector for automobile exhaust pipe of the present invention.

Figure 3 is a half cross-sectional view showing one embodiment of the connector for automobile exhaust pipe of the present invention.

Figure 4 is a perspective view showing a separate retainer member mounted on the connector for the car exhaust pipe of the present invention.

* Description of the major symbols in the drawings *

10-Bellows member 20-Outer braid member

30-Retainer member 31-Seating part

32-coupling groove 40-ring damper member

50-cap 100- gas guide

110-Inner Braid Member 111-Inner Braid Fixing Belt

The object of the present invention is a bellows member (10) of a metallic material that has a predetermined width and size and is hollow molded in a hollow cylindrical shape repeatedly;

An outer braid member 20 which is positioned to be wrapped around the outer surface of the bellows member 10 at a constant distance from the surface of the bellows and braided at a predetermined angle;

It is fixed to both ends of the bellows member 10 and is positioned between the surface of the bellows member 10 and the outer braid member 20 to prevent contact, and the end portion is formed to be bent to form a single seat. A retainer member 30 provided with;

A ring damper member (40) mounted on an outer surface of the seating portion (31) formed in the retainer member (30);

Fixing cap 50 is fitted to the outer diameter of the outer braid member 20 so that the outer braid member 20 and the retainer member 30 can be fixed to the outer portion of the bellows member 10 In consisting of,

The retainer member 30 is formed in the outer peripheral surface of the seating portion 31 formed to be a single layer is formed coupling grooves 32 having a predetermined width, the end of the ring damper member 40 is the coupling groove 32 It is formed in a shape corresponding to the ring damper member 40 is achieved by being fitted into the coupling groove (32).

That is, the ring damper member 40 is not simply seated on the seating portion 31 of the retainer member 30, but is coupled to the coupling grooves 32 formed in the seating portion 31 in a concave-convex type, and therefore, bellows. When an external force is applied to the interference between the two members is increased.

Therefore, the resistance between the retainer member 30 and the ring damper member 40 increases the resistance in the torsional direction, and the contact area between the two members is adjusted to elastically change the characteristics of the axial direction to protect the bellows member. will be.

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

Figure 2 is a half sectional view showing the basic structure of the connector for automobile exhaust pipe of the present invention.

Figure 3 is a half cross-sectional view showing an embodiment of the connector for automobile exhaust pipe of the present invention, showing a state that the inner blade is provided as a gas guide means.

Figure 4 is a perspective view showing a separate retainer member mounted on the connector for automobile exhaust pipe of the present invention.

That is, as shown in FIG. 2, the bellows member 10 having a predetermined width and size and 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 braid member 10, that is, the outermost portion of the bellows member 10, is positioned to surround and maintain a predetermined gap with the surface of the bellows member 10, and is braided at a predetermined angle to be elastically deformed with respect to the tensile force. 20 is fixed.

In addition, both ends of the bellows member 10 are formed to be bent and monolayered so that the ring damper member 40 to be described later is seated, and a seating portion 31 is provided to the bellows member 10 surface and the outer blade. The retainer member 30, which is located between the members 20 and prevents contact, is fixed.

The greatest feature of the present invention is that the engaging groove 32 is excavated with a predetermined width in the axial direction on the outer circumferential surface of the seating portion 31 formed so that the retainer member 30 is monolayered.

And, the ring damper so that the end is supported by the bent portion of the seating portion 31 on the outside of the retainer member 30, that is, the outer peripheral surface of the seating portion 31 formed at the end of the retainer member 30. The member 40 is mounted to limit compression and shear displacement.

In addition, an end portion of the ring damper member 40 is formed in a shape corresponding to the coupling groove 32 so that the ring damper member 40 is fitted into the coupling groove 32 so as to be coupled thereto.

That is, when excessive displacements generated in each direction such as tension compression, bending and torsion are applied to the bellows member 10 according to engine vibration, road vibration, and exhaust system movement while driving the vehicle, the seating portion of the retainer member 30 is applied. The ring damper member 40 whose end is supported by the bent portion of 31 can limit the compression force and the displacement generated in the shear direction, thereby controlling the bellows member 10 within the displacement range of the elastic region. It is.

In addition, it improves the airtightness and vibration displacement absorbing capacity, which is the most important role of the connector for automotive exhaust pipe, and the damping effect at the resonance point is increased, which can significantly reduce noise.

In addition, the retainer member 30 and the ring damper member 40 are inserted into and coupled to the coupling groove 32 formed in the retainer member 30 in a concave-convex type to each other so that the ring damper member ( Both sides of the end portion of 40) are supported and can interfere with each other to increase the resistance in the torsional direction.

In addition, when the engine vibration or road vibration and the displacement of the exhaust system cause excessive displacement generated in each direction such as tension compression, bending and torsion while driving the vehicle, the retainer member 30 and the ring damper member 40 contact each other. The area is adjusted by the coupling groove 32 to be able to elastically change the characteristics of the axial direction.

On the other hand, the outer braid member 20 and the retainer member 30 is fitted to the end of the outer braid member 20 and the bellows member 10 so that the outer blade member 20 and the retainer member 30 can be fixedly positioned at the outer side of the bellows member 10. The fixing cap 50 is positioned.

The fixing cap 50 is predetermined so that the retainer member 30 and the outer braid member 20 located at the outer side of the bellows member 10 do not come into close contact with the respective surfaces on the outside of the body of the bellows member 10. Along with the role of maintaining the gap, the role of the medium for fixing the outer portion of the bellows is also performed at the same time, and is finally fixed to the outer side of the bellows member 10 by welding.

On the other hand, the present invention described above, when the damping efficiency and the resonant frequency needs to be changed by changing the density and shape of the ring damper member 40, or the number of layers of the outer braid member 20, or the braided wire You can change its thickness to adjust its function accordingly.

In addition, the shape of the ring damper member 40 and the retainer member 30 can be changed suitably according to the exhaust system characteristic.

In addition, 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 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 gas guide means uses an inner braid member 110 that is a braided mesh made of stainless wire as shown in FIG. 3, and has an inner tightening function in a circumferential direction of the bellows member 10. It is installed by fixing using the braid fixing belt 111.

That is, when the inner braid member 110 is subjected to an axial or bending displacement, friction occurs between two layers of wire braiding nets when both ends are fixed, and a damping effect is generated. 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, although not shown, as the gas guide means, an interlock member, a gas guide inner sleeve member, or the like may be selectively used in addition to the inner braid member described above.

According to the configuration of the present invention, the ring damper member for controlling the movement of the bellows member within the elastic region by limiting the compressive force and the displacement in the shear direction is fitted into the coupling groove formed in the retainer member in the concave-convex type to each other, the coupling groove Both sides of the end of the ring damper member is supported on the inner side of the to interfere with each other, thereby increasing the resistance in the torsional direction.

In addition, if the engine vibration or road vibration and the displacement of the exhaust system cause excessive displacement generated in each direction such as tension compression, bending and torsion, the contact area between the retainer member and the ring damper member is applied to the coupling groove. It can be adjusted by the elasticity of the axial characteristics.

Therefore, durability can be improved even in the deformation and displacement of excessive external force generated during driving of the vehicle and applied to the bellows member.

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

Claims (1)

A bellows member 10 made of a metal material having a predetermined width and size and a corrugated corrugation repeatedly formed into a hollow cylinder; An outer braid member 20 which is positioned to be wrapped around the outer surface of the bellows member 10 at a constant distance from the surface of the bellows and braided at a predetermined angle; It is fixed to both ends of the bellows member 10 and is positioned between the surface of the bellows member 10 and the outer braid member 20 to prevent contact, and the end portion is formed to be bent to form a single seat. A retainer member 30 provided with; A ring damper member (40) mounted on an outer surface of the seating portion (31) formed in the retainer member (30); Fixing cap 50 is fitted to the outer diameter of the outer braid member 20 so that the outer braid member 20 and the retainer member 30 can be fixed to the outer portion of the bellows member 10 In consisting of, The retainer member 30 is formed in the outer peripheral surface of the seating portion 31 formed to be a single layer is formed coupling grooves 32 having a predetermined width, the end of the ring damper member 40 is the coupling groove 32 The ring damper member 40 is formed in a shape corresponding to the connector for automobile exhaust pipe, characterized in that the coupling groove is fitted into the coupling groove (32).