KR200240736Y1 - Flexible coupling for vehicle - Google Patents

Abstract

The present invention relates to a flexible coupling for automobiles, wherein the acids of the corrugated shape are repeatedly formed in a hollow cylindrical shape with a predetermined width and size, and the outer diameter is sequentially increased toward the center at both ends, and the inner diameter is decreased, so that An inclined mountain portion 11 forming an inclination angle is formed, and a central bellows member 10 having an intermediate mountain portion 12 having a constant mountain height is formed at both ends thereof, and both ends of the inclined mountain portion 11 of the bellows member 10. The outer braid member 20 is in close contact with the outer surface of the bellows member 10 at the outermost side of the intermediate peak portion 12 and is positioned to be wrapped and braided at a predetermined angle. It is composed of a fixing cap 30 is fitted to the outer diameter of the outer braid member 20 to be fixed to the outer portion of the bellows member 10 to be fixed The inclined acid (11) forming a square and the external force is dispersed to the tensile, compressive and bending displacement, it is capable of absorbing an excessive torsional displacement.

In addition, the outer braid member 20 positioned to surround the outermost side of the bellows member 10 maintains a constant distance from the middle peak portion 12 of the bellows member 10, and both ends thereof closely adhere to the inclined peak portion 11. It is installed to prevent damage due to friction between the inner surface of the outer blade and the surface of the bellows member 10 during use.

Therefore, a very useful design that can increase the durability of the bellows member 10 by dispersing and absorbing all external forces such as tension, compression, bending, and torsional displacement caused by vibration of the engine 2 generated during driving or exhaust pipe vibration received from the road surface. It is

Description

Automotive Flexible Coupling {FLEXIBLE COUPLING FOR VEHICLE}

The present invention relates to a flexible coupling for automobiles. More specifically, torsional displacements generated from engine vibrations and road surfaces while driving are formed by forming inclined mountain portions at both ends of the bellows member and assembling the outer braid member in close contact with the inclined mountain portions. It is designed to increase the durability of the bellows by absorbing.

In general, the automobile exhaust pipe is equipped with a flexible coupling in order to absorb external forces generated from engine vibration and road vibration, to increase the service life of the exhaust pipe and to improve ride comfort.

As described above, the connector connected to the exhaust pipe of the vehicle generally absorbs the tension, compression, and bending displacement generated along the movement of the exhaust system from the engine vibration and road vibration. Depending on the design and shape, torsional displacements occurring in each direction may be involved.

Therefore, metal bellows are mainly used to improve airtightness and vibration displacement absorbing ability, which are the core roles 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 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 in the state.

As mentioned above, the core role of the connector for automobile exhaust pipe is mainly made of metal bellows with good airtightness and vibration displacement absorption capacity, but the bellows itself causes excessive torsional displacement, which causes any large stress and controls displacement or load by itself. The ability to do it is diminished.

On the other hand, the method of increasing the durability of the bellows to the torsional displacement as described above is not designed to be rotated in part without integrally the bellows member introduced in Japanese Patent Application Publication No. 61-51432 of the Japanese Patent Office. There was a problem that the exhaust gas leaked out, and the outer braid surrounding the outside of the bellows was easily broken in the middle by the free rotation of the bellows.

In addition, by changing the bellows mountain shape introduced in Japanese Patent Laid-Open Nos. 8-121658 and EP 0770808A1, the spring constant of the bellows is lowered to facilitate vibration absorption in the exhaust system and to reduce the cost by making it compact. They are manufactured only in the inner diameter of bellows members differently, or are applied to compact flexible couplings of less than 15 mountains. When torsion stress is applied, they are damaged due to the bellows valley step or insufficient absorption of torsion due to lack of arithmetic. There was a problem.

An object of the present invention is to form inclined mounts at both ends of the bellows member, and the both ends of the outer braid member surrounding the outer surface of the bellows are brought into close contact with the inclined mount, and fixed to maintain a predetermined gap in the middle of the driving. The present invention provides a flexible coupling for automobiles that can increase durability by absorbing excessive torsional displacement caused by vibration of the engine and road surface.

1 is a schematic diagram of a motion absorbed by the exhaust pipe structure of the vehicle and the flexible coupling of the present invention.

Figure 2 is a half sectional view showing a basic idea of the present invention.

3 is an enlarged view of a portion A of FIG. 2;

4 is an enlarged view of a portion B of FIG. 2;

Figure 5 is a half cross-sectional view showing another embodiment of the present invention.

* Description of the major symbols in the drawings *

1-Flexible Coupling 2-Engine

3-exhaust pipe 4-converter

5-Silencer 10-Bellows

11-Sloped Mountain 12-Sloped Mountain

20-outer braid member 30-fixing cap

40-interlock liner element 41-interlock liner fixing sleeve

50-inner braid member 51-inner braid fixing belt

The purpose of the present invention is to have a predetermined width and size, the hollow cylindrical shape of the acid is repeatedly formed, both ends in the sequential increase in the outer diameter toward the center and the inner diameter is reduced to achieve a predetermined inclination angle (α) in and out A bellows member 10 formed of a metallic material having an inclined mountain portion 11 and an intermediate mountain portion 12 having a predetermined mountain height formed at a central portion thereof;

Both ends are in close contact with the inclined mountain portion 11 of the bellows member 10, and are positioned to be wrapped and kept at a constant distance from the surface of the bellows member 10 to the outermost side of the middle mountain portion 12. An outer braid member 20 braided therewith;

It is achieved by consisting of a fixing cap 30 is fitted to the outer diameter of the outer braid member 20 so that the outer braid member can be fixed to the outer portion of the bellows member 10.

That is, since the diameter of the bellows member 10, which is used to improve airtightness and vibration displacement absorption capacity, is sequentially increased from the central peak toward both ends, between the engine 2 and the exhaust pipe 3 of the vehicle. Compression, tension and bending, torsional displacement, etc. due to vibrations generated while driving are dispersed at both ends to absorb excessive external force, thereby improving durability of the bellows member 10.

In addition, the outer braid member 20 maintains a constant distance from the surface of the bellows member 10, and both ends are in close contact with the inclined mount portion 11 so as to surround the outermost side of the bellows member 10. The damage caused by the friction between the inner surface of the braid and the surface of the bellows member 10 can be prevented.

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

1 is a schematic view of the exhaust pipe structure of a vehicle and the motion absorbed by the flexible coupling of the present invention.

2 is a basic structure of the present invention, each of which has an inclination angle to two peaks at both ends of the bellows member 10, and the bellows member 10 closely attaches the outer blade to the inclined mountain portion 11 and maintains a predetermined peak height. The center part of the figure is a half sectional view showing a state in which the outer blades are assembled at predetermined intervals.

3 is an enlarged view illustrating main parts of part A of FIG. 2.

4 is an enlarged view illustrating main parts of part B of FIG. 2.

5 is a half sectional view showing the inner braid member 50 mounted inside the bellows member 10 as a gas guide means in the basic structure of the present invention.

The flexible coupling 1 of the present invention connects the engine 2 and the exhaust pipe 3 as shown in FIG. 1, and the converter 4 and the silencer 5 are mounted at the end of the exhaust pipe 3. Lose.

In general, the bellows member 10 has a predetermined width and size, and the hollow bellows member 10 is formed in a hollow cylindrical shape. The bellows member 10 has a tubular shape corrugated at both ends, and absorbs the displacement in the axial direction or the bending direction. After the external force is removed to restore.

And, the biggest feature in the present invention is the inclination of the outer diameter is sequentially increased toward the center at both ends of the bellows member 10 as shown in Figure 2 and the inner diameter is reduced to achieve a predetermined inclination angle (α) in and out A peak portion 11 is formed, and both ends of the outer braid member 20 positioned to surround the outermost portion of the bellows member 10 are brought into close contact with the inclined peak portion 11, and the center of the bellows member 10 The outer braid member 20 is fixed to both ends of the bellows member 10 to have a predetermined distance from the outer braid member 20.

That is, the cross-sectional coefficient is gradually increased by sequentially increasing the diameters of the corrugated mountains to the ends of the bellows member 10 at both ends of the intermediate peak portion 12 where the corrugated mountains are repeatedly formed at a constant height in the center of the bellows member 10. Since it has a structure that is increased by, the compression, tension and bending caused by the vibration generated during driving, torsional displacement, etc. are uniformly distributed to each acid to absorb excessive external force, in particular the bellows member 10 due to the torsional displacement This can prevent the breakage.

In addition, the outer braid member 20 surrounding the outer side of the bellows member 10 is in close contact with the inclined surface formed on both ends of the bellows member 10, and has a constant distance from the intermediate peak portion 12 having a constant height. It is positioned to have, so as to prevent damage due to friction between the inner surface of the outer braid and the surface of the bellows member 10 during installation use.

On the other hand, in the present invention, the bellows member 10 is composed of at least 20 or more repeatedly formed peaks of the corrugation, when the torsional displacement due to the stepped portion of the bellows member 10 is easily cracked, or lack of arithmetic It is possible to prevent the problem of not sufficiently absorbing the torsional displacement.

In addition, the inclination angle α of the inclined mountain portion 11 formed at both ends of the bellows member 10 is 7 ° to 17 ° to prevent the bellows member 10 from being easily damaged due to tension and compression displacement. desirable.

In addition, the outer braid member 20 surrounding the outermost side of the bellows member 10 is formed by braiding metal wires at an angle β of 120 ° to 140 ° to form a tension, compression, and bending during driving of a vehicle. Part of the displacement can be absorbed and protects the bellows member 10 from the external environment.

On the other hand, a fixing cap 30 is fitted and coupled to the end of the outer braid member and the bellows member 10 so that the outer braid member may be fixedly positioned at the outer side of the bellows member 10.

The fixing cap 30 has a function of maintaining a predetermined gap so that the outer braid member positioned at the outer side of the bellows member 10 does not come into close contact with each surface on the outside of the bellows member 10. At the same time, the role of the medium to be fixed to the outer side of the member 10 is also fixed to the outer side of the bellows member 10 by welding.

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, A gas guide means can be provided to protect the bellows member 10 from the high temperature exhaust gas and to improve durability.

As shown in FIG. 2 and FIG. 5, an interlock liner member 40 or an inner braid member 50 may be used as the gas guide means.

As shown in FIG. 1, the interlock liner member 40 is positioned in a state where a predetermined gap is maintained inside the bellows member 10, and is wound in a spiral shape to absorb deformation in a longitudinal direction and a bending direction. You can.

That is, the inclined mount portion 11 is formed at both ends, and the interlock liner member 40 selectively absorbs the deformation in the longitudinal direction and the bending direction inside the bellows member 10 that absorbs the tension, compression or torsional displacement. Since it can be installed and used, it can maximize the durability increase.

The interlock liner member 40 may be firmly fixed to the inside of the bellows member 10 by welding in a state where both ends thereof overlap each other with a ring-shaped interlock liner fixing sleeve 41 by a medium.

That is, the outer end of the interlock fixing sleeve 41 is welded and fixed while being fitted in the inner diameter of the bellows member 10, and the other end thereof is partially overlapped in a state of being bent toward the inside of the interlock liner member 40. The spot welding is carried out at several places to keep the bellows member 10 and the interlock liner member 40 completely engaged with each other.

In addition, the inner braid member 50 uses a mesh braided by a stainless wire material as shown in FIG. 2, and has an inner braid fixing belt having a circumferentially tightening function inside the bellows member 10. It is fixed by using 51 and installed.

That is, when the inner braid member 50 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.

According to the configuration of the present invention as described above, both ends of the bellows member 10 toward the center in order to increase the outer diameter and the inner diameter is reduced inclined mountain portion (11) to form a predetermined inclination angle (α) inward and outward tension, It can dissipate external forces against compression and bending displacement and absorb excessive torsional displacement.

In addition, the outer braid member 20 positioned to surround the outermost side of the bellows member 10 maintains a constant distance from the middle peak portion 12 of the bellows member 10, and both ends thereof closely adhere to the inclined peak portion 11. It is installed to prevent damage due to friction between the inner surface of the outer blade and the surface of the bellows member 10 during use.

Therefore, a very useful design that can increase the durability of the bellows member 10 by dispersing and absorbing all external forces such as tension, compression, bending, and torsional displacement caused by vibration of the engine 2 generated during traveling or exhaust pipe vibration received from the road surface. It is

Claims (4)

Corrugated mountains are repeatedly formed in a hollow cylindrical shape with a predetermined width and size, and both ends thereof have an inclined mountain portion 11 having a predetermined inclination angle α in and out as the outer diameter increases and the inner diameter decreases sequentially. A bellows member (10) formed of a metallic material having an intermediate peak portion (12) having a predetermined peak height; Both ends are in close contact with the inclined peak portion 11 of the bellows member 10, and are positioned to be wrapped and kept at a constant distance from the surface of the bellows member 10 to the outermost side of the intermediate peak portion 12. An outer braid member 20 braided therewith; For the automobile characterized in that the outer braid member is composed of a fixing cap 30 is fitted to the outer diameter of the outer braid member 20 is coupled to be fixed to the outer side of the bellows member (10) Flexible coupling. 2. The flexible coupling for automobile according to claim 1, wherein the inclination angle α of the inclined mountain portion 11 formed at both ends of the bellows member is between 7 degrees and 17 degrees. The flexible coupling of claim 1, wherein the outer braid member is formed by braiding at an angle β of 120 ° to 130 °. 2. The flexible coupling of claim 1, wherein any one of an interlock liner member (40) or an inner braid member (50) is mounted inside the bellows member (10).