KR200216150Y1 - exhaust pipe decoupler for automobile - Google Patents

Abstract

The present invention relates to a connector for an automobile exhaust pipe, and the corrugated corrugation is repeatedly formed in a hollow cylindrical shape having a predetermined width and size, maintaining the airtightness of the exhaust gas generated from the engine 1 side, absorbing the stretching and bending A bellows member 10 made of metal;

A tubular inner sleeve member 20 positioned inside the bellows member 10 to protect the bellows member 10 and connected to allow a high temperature exhaust gas to pass through therein;

It is fixed to the other end of the bellows member 10, a predetermined arc surface 41 extending to the end of the cylindrical portion 43 and its front end with respect to the movement center point (C) of the bellows member 10 ( 42 is formed and the guide member 40 surrounding the outside of the bellows member 10;

The outer surface of the gear member 40 is wrapped, and curved portions 61 and 62 are formed on both sides thereof, and each of the curved portions 61 and 62 is integrally formed. A retainer member 60 formed by bending;

A first inner meshing member having a contact surface inwardly formed in a cross-sectional shape filling the arc surfaces 41 and 42 of the guide member 40 and the curved portions 61 and 62 of the retainer member 60 ( 50) and a second inner meshing member 51;

It is fixed to one end of the bellows member 10, and positioned to surround the outer side of the retainer member 60, the front and rear portions of the body having a predetermined slope relative to the center of motion (C) inclination The parts 81 and 82 are formed symmetrically, respectively, and the ends of the inclined parts 81 and 82 are each bent and formed cover member 80;

Located inside the inclined portions 81 and 82 of the cover member 80, the lower side of the body and the outer surface of the curved portion 61, 62 of the retainer member 60 and a constant space portion 90 And the first outer meshing member 70 and the second outer meshing member 71 formed in the same shape, and the outer meshing member 70 and 71 when pitching vibrations of vertical vibration are generated in the engine. ) And the space portion 90 formed between the retainer member 60 can absorb an axial displacement such as tension, compression, and the like.

In addition, the guide member 40 surrounding the outer surface of the bellows member 10 is slid to the inner surface of the inner meshing member 50, 51, thereby absorbing the bending displacement caused by the above-described pitching vibration and rolling motion It can absorb all of the displacement.

Therefore, durability and ride comfort of the exhaust system can be increased, and the life can be extended.

Therefore, it is a very useful design that can reduce the wear and friction noise in the connector to reduce the reliability of the product and the fatigue life of the entire exhaust pipe.

Description

Exhaust pipe decoupler for automobile

The present invention relates to a connector for automobile exhaust pipe, and more particularly, it is designed to easily absorb pitching vibration and rolling motion generated when vertically connecting exhaust pipes to improve exhaust system durability and ride comfort. .

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, the metal bellows member is mainly used to improve the airtightness and vibration displacement absorbing ability, which are the core roles of the connector for the automobile exhaust pipe.

Such a connector is known, but the situation is using the configuration proposed in Utility Model Registration Application No. 2000-002443 designed to functionally absorb the displacement in the bending direction.

The utility model registration application No. 2000-002443 is formed with a predetermined width and size as shown in FIG. 5, and maintains the airtightness of the exhaust gas generated from the engine side and absorbs the expansion and bending displacement. Inside the 10 ', a tubular inner sleeve member 20' is provided which protects the bellows member 10 'and guides the hot exhaust gas through.

In addition, at the other end of the bellows member 10 ', both side portions of the guide member are formed with predetermined arc surfaces 41' and 42 'extending from the center of motion C' of the bellows member 10 '. 40 'is positioned to surround the outside of the bellows member 10'.

The cover member 80 ′ fixed to one end of the bellows member 10 ′ and positioned outwardly of the guide member 40 ′ has a predetermined body inclination with respect to the movement center point C ′. And an inclined portion 81 'having a body, and a rear portion of the body is integrally bent with a buffer member protection portion 83' formed therein, and both side ends of the cover member 80 'formed as described above and the guide member ( First and second cushioning members having an inner surface contacting the arc surface, and having an outer surface fixed to the inclined portions 81 'and 82' between each of the arc surfaces 41 'and 42' of 40 '). 70 'and 71' are positioned.

That is, when the bending direction is generated while the vehicle is running, an arc surface of the guide member 40 'fixed to the outside of the bellows member 10' along the contact surfaces of the first and second buffer members 70 'and 71'. The 41 'and 42' slide to absorb the shock displacement.

However, according to the utility model registration application No. 2000-002443 described above, it is mainly configured to absorb only the impact due to bending displacement, so as to absorb the impact against the pitching vibration, which is tension, compression displacement, or vertical vibration. There was a problem.

Therefore, when mounted to the exhaust pipe vertically, as shown in Figure 1 can not absorb the pitching vibration, the durability is eventually reduced, there is a closed end to reduce the vibration absorption and noise reduction effect of the car.

In addition, there were limitations on the scope of application and the model of the connector for the exhaust pipe.

It is an object of the present invention to provide a connector for an automotive exhaust pipe that can effectively absorb the pitching vibration generated from the engine when connected to the exhaust pipe vertically to improve exhaust system durability and ride comfort.

Another object of the present invention is to provide a connector for an automobile exhaust pipe that can absorb various vibration displacements generated in an engine and increase its application range.

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

1 is a schematic diagram of a mounting position and vibration displacement absorbing motion of a connector for an 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.

3 is a conceptual diagram when absorbing a composite displacement when the tensile displacement and the bending displacement occur simultaneously in the present invention.

4 is a conceptual diagram when the composite displacement absorption when the compression displacement and bending displacement occur simultaneously in the present invention.

Figure 5 is a half sectional view showing a configuration of a conventional exhaust pipe connector.

Description of the main symbols in the drawings

1-Engine 2-End Connections for Automotive Exhaust Pipes

3-exhaust pipe 4-silencer

5-Converter 10-Bellows member

20-inner sleeve member 30-rear sleeve member

40-guide member 41, 42-arc surface

50-1st inner meshing member 51-2nd inner meshing member

60-Retainer member 61, 62-Curved section

70-1st outer meshing member 71-2nd outer meshing member

80-cover member 81, 82-inclined portion

90-space

The object of the present invention is to have a predetermined width and size, the hollow bellows of the corrugated shape is repeatedly formed, to maintain the air tightness of the exhaust gas generated from the engine 1 side, the bellows of the metal material to absorb the expansion and bending Member 10;

A tubular inner sleeve member 20 positioned inside the bellows member 10 to protect the bellows member 10 and connected to allow a high temperature exhaust gas to pass through therein;

It is fixed to the other end of the bellows member 10, a predetermined arc surface 41 extending to the end of the cylindrical portion 43 and its front end with respect to the movement center point (C) of the bellows member 10 ( 42) a guide member 40 formed to surround the outside of the bellows member 10;

The outer surface of the gear member 40 is wrapped, and curved portions 61 and 62 are formed on both sides thereof, and each of the curved portions 61 and 62 is integrally formed. A retainer member 60 formed by bending;

A first inner meshing member having a contact surface inwardly formed in a cross-sectional shape filling the arc surfaces 41 and 42 of the guide member 40 and the curved portions 61 and 62 of the retainer member 60 ( 50) and a second inner meshing member 51;

It is fixed to one end of the bellows member 10, and positioned to surround the outer side of the retainer member 60, the front and rear portions of the body having a predetermined slope relative to the center of motion (C) inclination The parts 81 and 82 are formed symmetrically, respectively, and the ends of the inclined parts 81 and 82 are each bent and formed cover member 80;

Located inside the inclined portions 81 and 82 of the cover member 80, the lower side of the body and the outer surface of the curved portion 61, 62 of the retainer member 60 and a constant space portion 90 And the first outer meshing member 70 and the second outer meshing member 71 formed in the same shape.

That is, the outer meshing members 70 and 710 positioned inside both inclined portions 81 and 82 of the cover member 80 surrounding the outermost side of the bellows member and the curved portion 61 of the retainer member 60. Since a predetermined space portion 90 is formed between the 62 and 62, compression and tensile displacement due to pitching vibrations generated during driving at both ends coupled between the engine and the exhaust pipe of the vehicle are performed. It can absorb axial displacement by).

In addition, the first and second inner meshing members positioned inside the curved portions 61 and 62 of the retainer member 60 are guided along the arc surfaces 41 and 42 of the guide member 40 so that the engine It can absorb the bending displacement due to the rolling motion of.

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

1 is a schematic diagram of a motion absorbing mounting position and vibration displacement in an exhaust system of a connector for an automobile exhaust pipe;

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

3 is a conceptual diagram showing a motion state of the exhaust pipe connector to absorb the composite displacement when the tensile displacement and the bending displacement occurs in the present invention at the same time.

4 is a conceptual diagram illustrating a motion state of the exhaust pipe connector for absorbing the composite displacement when the compression displacement and the bending displacement occur simultaneously in the present invention.

In general, the engine is supported by several mounting means, and has a muffler at the exhaust port side of the exhaust pipe, and the engine 1 side and the exhaust pipe 3 are connected by the exhaust pipe connector 2, as shown in FIG. As described above, the converter 5 and the silencer 4 are mounted at the end of the exhaust pipe 3.

As shown in FIG. 2, the bellows member 10 of the connector for automobile exhaust pipe according to the present invention absorbs the displacement in the stretch direction to the bending direction, and also includes the inner sleeve member 20 and the guide member 40. It prevents the leakage of exhaust gas passing through the inside of) and absorbs the stretching and banding.

In addition, the bellows member 10 is repeatedly wrinkled as shown in the drawing to mainly restore the external force after removing the displacement and the like in the longitudinal direction and the bending direction.

On the other hand, the inner front portion of the bellows member 10 to protect the bellows member 10, the tubular inner sleeve member 20 is connected to be connected so that the high-temperature exhaust gas passes through the inside, the rear end is fixed The rear sleeve member 30 is provided.

In addition, although not shown, the inner sleeve member 20 may be formed symmetrically in the lateral direction from the inside of the bellows member 10 to reduce the exhaust resistance to induce a smooth exhaust flow.

And, the outer side of the bellows member 10 is fixed to the other end of the bellows member 10, the guide member 40 which is moved in the bending direction with the bellows member 10 when the bending occurs as shown in FIG. It is.

The central portion of the guide member 40 is in the shape of a straight cylindrical portion 43, the extension line of the radius (R1) extending from the end point and the tip side of the cylindrical portion 43 with respect to the center point of the bellows member (10) Arcs 41 and 42 are formed.

That is, as illustrated in FIG. 2, circular arc surfaces 41 and 42 formed with a predetermined radius R1 at the center of motion C of the bellows member 10 are the first and second inner meshing members to be described later. 50 and 51 are formed so as to be able to absorb the bending impact while sliding with each other, the bending center point to the center of motion (C) of the bellows member 10, the bellows member 10 is pure Induced by the angular motion, the stress is induced to the lowest to have a sufficient durability even if the bellows member 10 composed of a few acids.

In addition, when the sliding jaw is formed by bending when the intermittent jaws 44 are formed at the end portions of the guide members 40, the second inner meshing members 51 are formed as shown in FIG. 3. Can be grounded and act as a stopper.

In addition, the outer surface of the guide member 40, the front and rear portions of the body portion of the bellows member 10 with respect to the center of motion (C) of the curved surface portion 61, 62 having a predetermined slope is symmetrical, respectively The retainer member 60 is formed.

The curved portions 61 and 62 formed on both sides of the body of the retainer member 60 are centered on the center of motion C of the bellows member 10 outside the arc surfaces 41 and 42 of the guide member 40. An axis is formed at an extension line in which an arc is drawn with a radius R2 larger than the radius R1 of the arc surfaces 41 and 42.

In addition, end portions of both curved portions 61 and 62 are integrally bent and molded to smoothly move when displacement occurs in the bending direction.

On the other hand, the first inner meshing member 50 between the inner side of the curved portion (61, 62) formed on both sides of the retainer member 60 and the outer side of the arc surface (41, 42) of the guide member 40 And a second inner meshing member 51 is located.

The outer surfaces of the first and second inner meshing members 50 and 51 are coupled with the same slope as the inner surfaces of the curved portions 61 and 62, and the inner surface is the arc surface 41. It is in contact with the same slope as the outer surface of (42).

That is, in this state, the guide member 40 fixed to the outside of the bellows member 10 is moved when the bending occurs by running of the vehicle, the outer surface of the circular arc (41, 42) of the guide member 40 is Sliding along the inner surface of the first and second inner meshing members 50, 51, the shock displacement can be absorbed between the arc surface (41) 42 and the curved portion (61, 62) will be.

On the other hand, the outer side of the retainer member 60 is provided with a cover member 80 fixed to one end of the bellows member 10.

The cover member 80 is formed to be symmetrically formed inclined portions 81 and 82 having a predetermined slope relative to the center of the bellows member 10 movement to the front and rear portions of the body, respectively, the inclined portion ( The radius of 81 and 82 is formed at an extension line in which an arc is drawn with a radius R3 larger than the radius R2 of the curved portions 61 and 62.

In addition, at the ends of the one side inclined portion (81, 82) is formed a buffer member protection portion 83 is bent to prevent the first outer meshing member 70 is exposed to the outside damage.

On the inner surface of the inclined portions 81 and 82 of the cover member 80, the outer surface has the same radius of curvature as the inner surface of the inclined portions 81 and 82, and the inner surface of the retainer member 60 The first outer meshing member 70 and the second outer meshing member 17 are formed to have the same radius of curvature as the outer surface.

A space having a gap of about 2 to 3 mm is formed between the inner surfaces of the first and second outer meshing members 70 and 17 and the outer surfaces of the curved portions 61 and 62 of the retainer member 60. The part 90 is formed and the first and second outer meshing members 70 and 71 are in close contact with the outer surface of the retainer member 60 when sliding or axial displacement occurs. It is supposed to be done.

That is, as shown in FIG. 3, when the axial tensile displacement and the bending direction displacement occur at the same time, the gap of the front space portion 90 is doubled by the tensile displacement, and the gap of the rear space portion 90 is increased. In a close contact state, the circular arc surfaces 41 and 42 of the guide member 40 are slidably moved along the inner surfaces of the first and second inner meshing 50 and 51, thereby bending the bending displacement. θ) can be absorbed.

In addition, when the axial compression displacement and the displacement in the bending direction occur at the same time, as shown in FIG. 4, the gap of the front space portion 90 is in close contact with the compression displacement, and the gap of the rear space portion 90 is closed. In the doubled state, the bending surface is bent while the circular arc surfaces 41 and 42 of the guide member 40 slide along the inner surfaces of the first and second inner meshing 50 and 51. It can absorb as much as the angle θ.

Therefore, as shown in FIG. 1, the pitching vibration, which is the vertical vibration of the engine generated when the exhaust pipe coupling is mounted on the vertical pipe, and the rolling motion can be absorbed at the same time, thereby increasing the durability of the coupling.

In addition, since the center points of the bending displacements are all coincident with the center of motion (C) of the bellows member 10, when the bending displacement occurs, the stresses applied to the bellows member 10 are uniformly distributed so that the bellows member 10 It can increase the life.

Meanwhile, the first and second inner meshing members 50 and 51 and the first and second outer meshing members 70 and 71 are formed in the longitudinal direction together with the impact from the vibration of the engine or the road surface vibration during driving. It is an elastic body that can elastically absorb elastic displacement and bending displacement.

Therefore, the inner meshing members 50 and 51 and the outer meshing members 70 and 71 are semi-permanently having elasticity to be restored after being compressed in any direction and more easily molded. Usually, the meshes woven from thin wires are compressed to have a ring shape.

In addition, since the inner surfaces of the inner meshing members 50 and 51 and the outer meshing members 70 and 71 are repeated a number of times when bending displacement occurs, the inner surface of the inner meshing members 50 and 51 and the guide member 40 may be fixed to the inner surface for durability. Lubrication coating may be performed with a suitable surface treatment means such as graphite coating or insulation coating for smooth sliding movement between the retainer members 60, reduction of friction noise during sliding movement, and prevention of finishing.

In addition, when tension or compression, which is an displacement in the axial direction, occurs, the first and second outer meshing members 70 and 71 slide in close contact with the outer side of the retainer member 60, thereby preventing noise generated at this time. Preferably, the first and second outer meshing members 70 and 71 are spot welded to the cover member 80, respectively.

According to the configuration of the present invention, when the pitching vibration of the upper and lower vibration occurs in the engine by the space portion 90 formed between the outer meshing member 70, 71 and the retainer member 60, tension, compression, etc. It can absorb axial displacements such as

In addition, the guide member 40 surrounding the outer surface of the bellows member 10 is slid to the inner surface of the inner meshing member 50, 51, thereby absorbing the bending displacement caused by the above-described pitching vibration and rolling motion It can absorb all of the displacement.

Therefore, durability and ride comfort of the exhaust system can be increased, and the life can be extended.

Therefore, it is a very useful design that can reduce the wear and friction noise in the connector to reduce the reliability of the product and the fatigue life of the entire exhaust pipe.

Claims (3)

A bellows member (10) of metal material which has a predetermined width and size and is repeatedly formed in a corrugated corrugate shape to maintain the airtightness of the exhaust gas generated on the engine side and absorb the stretching and bending; A tubular inner sleeve member (20) positioned inside the bellows member (10) to protect the bellows member (10) and connected to allow a high temperature exhaust gas to pass through therein; The bellows member 41 is fixed to the other end of the bellows member 10, and a predetermined arc surface 41, 42 is formed at the end of the cylindrical portion and its tip side extending from the center of motion of the bellows member 10. A guide member 40 surrounding the outside of the member 10; The rear gear member surrounds the outer side, and both sides are formed with curved portions 61 and 62 extending around the movement center point, respectively, and ends of each curved portion 61 and 62 are integrally bent and retained. Member 60; A first inner meshing member formed into a cross-sectional shape filling the arc surfaces 41 and 42 of the guide member 40 and the curved portions 61 and 62 of the retainer member 60 and having a contact surface inwardly; A second inner meshing member; It is fixed to one end of the bellows, and positioned to surround the outer side of the retainer member 60, the front and rear parts of the body inclined portion 81, 82 having a predetermined slope with respect to the center of the movement point is They are each formed symmetrically, and the end portions of the inclined portions 81 and 82 are bent cover members 80, respectively; It is located inside the inclined portions 81 and 82 of the cover member 80, the lower side of the body is the same as the outer surface of the curved portion 61, 62 of the retainer member 60 and the same space 90 Connector for automobile exhaust pipe, characterized in that consisting of the first outer meshing member 70 and the second outer meshing member 71 formed into a shape. 2. The connector for automobile exhaust pipe according to claim 1, wherein the space portion (90) has a gap of 2-3 mm. The method of claim 1, wherein the first outer meshing member 70 and the second outer meshing member 71 is spot-welded to the inner surface of the inclined portion (81) 82 of the cover member 80 and fixed Connector for automobile exhaust pipe, characterized in that.