KR200193125Y1 - Flexible decoupling element for exahust pipe of automobiles - Google Patents

Abstract

The present invention relates to a flexible connector for automobile exhaust pipe, and has a predetermined width and size, the bellows (10) for maintaining the airtight of the exhaust gas generated from the engine side, absorbing the expansion and bending;

Located in the front portion inside the bellows 10, to protect the bellows 10, to allow the high-temperature exhaust gas to pass through the inside, and the seating jaw 21 is provided stepwise to the outside of the front body A front sleeve 20;

A rear sleeve (30) formed at a rear side of the front sleeve (20) and having a curved guide portion (31) at an end of the body front portion;

An inner retainer member 40 positioned outwardly of the rear sleeve 30;

A first cushioning member (50) positioned between the seating jaw (21) and the bellows (10) of the front sleeve (20) to cushion the impact in the bending and stretching directions;

A second buffer member (60) positioned outside the bent portion (41) of the inner retainer member (40) to cushion the bending impact;

In the front sleeve 20 and one side is fixed, the other side is composed of an outer cover (80) positioned at a predetermined interval with the inner retainer member (40);

The inner retainer member 40 has a guide portion 41 having a radius R2 around the displacement center portion C in an arc shape, and is formed on the contact surface between the first buffer member 50 and the rear sleeve 30. The radius R1 of the displacement center C as an axis, the outer surface of the first shock absorbing member 50 is a sliding curved surface portion 51, the rear sleeve 30 is formed with a curved guide portion 31, respectively When the excessive bending occurs, the curved guide portion 31 of the rear sleeve 30 is curved from the center of displacement C of the bellows 10 to the curvature radius R1 by a predetermined value, and at the same time, the inner retainer member 40 The guide portion 41 is also curved from the displacement center point C to the curvature radius R2 by a predetermined value.

Therefore, the bending motion can be smoothly performed by any desired angle, and the first shock absorbing member 50 and the second shock absorbing member 60 are protected from the exhaust gas and the outside, thereby preventing corrosion and breakage due to departure and external exposure. Damage can be reduced.

Therefore, it is a very useful design such as to improve the durability and reliability of the product.

Description

Flexible decoupling element for exahust pipe of automobiles

The present invention relates to a flexible connector for an automobile exhaust pipe, and more particularly, to effectively absorb the bending displacement generated from engine vibration and road vibration to improve exhaust system durability and ride comfort.

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 a coupling pipe decoupling element is provided at the connection portion to absorb and cushion vibration displacement, impact load, and thermal deformation. Is installed.

In addition, the exhaust pipe connector in such an installation position requires a robust and compact product capable of self-supporting the entire exhaust pipe with a small number of hanger mountings.

There are several types of connectors of this kind, but GB 2,277, 969A is generally used in a structure for forcibly determining the center point of the bending displacement as a means to more effectively absorb the displacement of the banding.

That is, as shown in FIG. 3, one sleeve 6 is separated by a sharply deformed protrusion 7 in a position where the sleeves 5 and 6 on both sides overlap with a space, and two pockets on both sides thereof. And a buffer member 8 separated from each other in this pocket.

The bellows 9 is fixed between the sleeves 5 and 6 so as to be exposed to the outside on one side of the buffer members 8.

Accordingly, one displacement center portion C, which can be bent and stretched, is formed at an approximately intermediate position where the sleeves 5 and 6 are overlapped, and a longitudinal stretch displacement from the vibration of the engine or the impact generated during driving. And the shock absorbing members 8 and the bellows 9 absorb the bending displacement in the state where the central axis angles before and after the exhaust pipe connecting portion intersect.

According to this structure, the bellows 9 is exposed to the outside, and stones, such as roads, are thrown off and damaged while driving, or durability due to corrosion is reduced.

In addition, since the center of displacement C of the banding is located at the intermediate point of the buffer member 8 to absorb the buffer and the banding, the inner side sleeve 6 connected to the exhaust pipe side when an impact having a momentary large displacement is applied is provided. Since it is exposed to high temperature exhaust gas as it is, in this state, an impact load is repeatedly received and a fatigue life becomes short.

And, since the bellows 9 is forced by bending moment rather than pure angular motion (Bangular motion), the life is shortened.

In order to compensate for this, since the number of wrinkles (arithmetic) of the bellows 9 is increased, an increase in the overall length is necessary, and the selection of materials to be durable and high quality has to be taken.

As the shock absorbing members 8 are not suitable for absorbing large bandings as a result of their failure to absorb the displacement in the bending direction, the performance of the exhaust pipe connector D is reduced as a whole. There were restrictions such as being limited.

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 tensioning 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 addition, in this case, when the bending motion of the exhaust system is input, the banding should be absorbed while sliding with the inner surface of the outer cover along the outer surface of the shock absorbing member. Endurance was lowered, and the vibration absorbing and noise reduction effects of the car were reduced.

The purpose of the present invention is to provide a flexible connector for automobile exhaust pipe, which can effectively absorb the bending displacement generated from engine vibration and road vibration even in adverse mounting environment due to the structure of the exhaust pipe and improve exhaust system durability and ride comfort. There is.

Another object of the present invention is to provide a flexible connector for an automotive exhaust pipe that can smoothly perform a bending motion by any desired angle.

Another object of this paper is to provide a flexible connector for an automotive exhaust pipe, which can improve the reliability and commerciality of the product.

1 is a half-sectional view of the flexible connector for automobile exhaust pipe of the present invention.

Figure 2 is a conceptual diagram when absorbing bending displacement of the flexible connector for automobile exhaust pipe of the present invention.

Figure 3 is a cross-sectional view showing the configuration of a conventional flexible connector for automobile exhaust pipe.

* Description of the symbols for the main parts of the drawings *

10-Bellows 20-Front Sleeve

21-Seating Chin 30-Rear Sleeve

31-Curved guide part 40-Inner retainer member

41-guide part 50-first buffer member

51-sliding surface part 60-2nd buffer member

70-contact surface 80-outer cover

81-shock absorber cover

An object of the present invention, the bellows (10) is formed having a predetermined width and size, and maintains the airtightness of the exhaust gas generated from the engine side, and absorbs expansion and bending;

Located in the front portion inside the bellows 10, to protect the bellows 10, to allow the high-temperature exhaust gas to pass through the inside, and the seating jaw 21 is provided stepwise to the outside of the front body A front sleeve 20;

A rear sleeve (30) formed at a rear side of the front sleeve (20) and having a curved guide portion (31) at an end portion of the body front portion;

An inner retainer member 40 positioned outwardly of the rear sleeve 30;

A first cushioning member (50) positioned between the seating jaw (21) and the bellows (10) of the front sleeve (20) to cushion the impact in the bending and stretching directions;

A second buffer member (60) positioned outside the bent portion (41) of the inner retainer member (40) to cushion the bending impact;

In the front sleeve 20 and one side is fixed, the other side is composed of an outer cover (80) positioned at a predetermined interval with the inner retainer member (40);

The inner retainer member 40 has a guide portion 41 having a radius R2 around the displacement center portion C in an arc shape, and is formed on the contact surface between the first buffer member 50 and the rear sleeve 30. The radius R1 of the displacement center C as an axis, the outer surface of the first shock absorbing member 50 is a sliding curved surface portion 51, the rear sleeve 30 is formed with a curved guide portion 31, respectively Is achieved.

Therefore, the flexible connector for automobile exhaust pipe according to the present invention has a rear sleeve 30 and an inner retainer member 40 each having a radius R1 (R2) around the displacement center C when the excessive bending displacement occurs. The sliding member smoothly slides in contact with the buffer member 50 and the second buffer member 60 to absorb the bending displacement.

In addition, when the stretching force is generated in the longitudinal direction, the bellows 10, the first buffer member 50, and the second buffer member 60 can absorb the displacement.

On the other hand, the second shock absorbing member 60 is separated by the shock absorbing member cover portion 81 bent to protect the end of the second shock absorbing member 60, or damage such as corrosion and damage due to external exposure can be reduced. Since the first buffer member 50 and the rear sleeve 30 are in curved contact with each other, the internal exhaust gas is in direct contact with the bellows 10, thereby significantly reducing thermal deformation and corrosion.

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

Hereinafter, described in detail by the accompanying drawings a preferred embodiment of the present invention as follows.

1 is a half cross-sectional view showing the internal configuration of the flexible connector for automobile exhaust pipe of the present invention.

Figure 2 is a conceptual diagram when absorbing the bending displacement of the flexible connector for automobile exhaust pipe of the present invention.

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.

1 and 2, the bellows 10 of the flexible connector for automobile exhaust pipes according to the present invention absorbs the displacement in the stretch direction to the bending direction, and each sleeve member and inner retainer member ( 40) prevents the leakage of exhaust gas passing through the inside, and absorbs the stretching and banding.

In addition, the bellows 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 front of the bellows 10 inside the front of the bellows 10 to protect the bellows 10, the tubular front sleeve 20 is connected so as to pass through the exhaust gas inside.

The front sleeve 20 has a seating jaw 21 which is stepped to the outside of the front of the body.

The seating jaw 21, which is formed to be stepped inward from the outside of the front of the body, may have a shape concentrically directed toward the inner diameter so as to position the first shock absorbing member 50 to be described later.

On the other hand, the rear sleeve 30 is located inside the inner retainer member 40 on the other side of the front sleeve 20.

On the other hand, the inner retainer member 40 is provided in a state in which the arc-shaped guide portion 41 is integrally bent toward the inside.

The guide portion 41 is formed to be able to slide in the bending direction even in the process of moving the second buffer member 60 to be described later in accordance with the bending displacement.

The second shock absorbing member 60 is positioned between the outer cover 80 on the outer side of the guide portion 41 of the inner retainer member 40.

Between the outer surface of the second buffer member 60 and the guide portion 41 is formed a contact surface 70 having a curved surface extending into an arc of a predetermined radius (R2) inside the body.

The contact surface 70 is formed with a predetermined curved surface so that the guide portion 41 formed on the front of the body of the inner retainer 40 can slide while being easily in contact with the banding occurs.

In addition, the guide part 41 also slides in contact with each other when the inner retainer member 40 is moved according to the bending displacement based on the center of motion C of the bellows 10 so as to absorb the bending shock. It is formed to have a predetermined radius of curvature R2.

That is, the slope of the contact surface 70 of the second buffer member 60 and the guide portion 41 of the inner retainer member 40 correspond to the movement center point C set as the center of the body of the bellows 10. Since the guide portion 41 of the inner retainer member 40 is moved when the bending occurs, it is possible to absorb and alleviate the bending displacement while sliding on the outer contact surface of the second buffer member 60.

Meanwhile, the bending center point as the bellows (10) center of motion (C) is to guide the bellows (10) to pure angular motion (in the angular motion) while inducing stress to the lowest to have a long life durability and Set it up together.

In addition, an outer cover 80 that protects the components from the outside of the front sleeve 20 and the inner retainer member 40 is installed.

The outer cover 80 is fixed to one side and the front sleeve 20, the other side is positioned at a predetermined interval with the inner retainer member 40, the welded portion in the middle portion of the butt weld method in the middle for assembly 82 is formed.

The outer cover 80 is positioned at a predetermined distance from the inner retainer member 40 because the inner retainer member 40 may be secured so that the inner retainer member 40 may be moved by bending. 40 and a predetermined interval.

In addition, the shock absorbing member cover portion 81 formed on the body rear side of the outer cover 80 is firmly fixed to the second shock absorbing member 60 without being detached to the outside when a bending displacement or an impact is applied during the bending shock. And a protective role.

On the other hand, the contact surface of the first cushioning member 50 and the rear sleeve 30 has a sliding curved surface portion 51 in the contact portion of the first buffer member 50 with a radius R1 around the center of displacement C. And, to the rear sleeve 30 to form a curved guide portion 31, respectively.

Here, the radius R1 is preferably designed to have the same bending displacement direction as the movement radius R2 of the inner retainer member 40 in which the inner retainer member 40 moves.

That is, the radius (R1) R2 is to be formed in each of the displacement center (C) as the center point as shown in the figure.

Therefore, when bending occurs, the inner retainer member 40 and the rear sleeve 30 fixed to the lower side simultaneously bend at a predetermined angle (??) as shown in FIG. 31 may absorb the bending shock while being in contact with the sliding curved portion 51 of the first cushioning member 50, and the second shock absorbing member 60, which is fixed to the inside of the end of the outer cover 80, is also inner. The guide portion 41 of the retainer 40 slides while being in surface contact, thereby alleviating the bending impact.

The first and second shock absorbing members 50 and 60 mentioned above are elastic materials capable of elastically absorbing the elastic displacement and the bending displacement in the longitudinal direction along with the impact from the vibration of the engine or the road vibration during driving. to be.

Accordingly, the first and second shock absorbing members 50 and 60 are semi-permanently having elasticity to be restored after being compressed in any direction, and a net body woven from a thin wire in consideration of easier molding. It is preferable to shape the ring shape by compressing the

At this time, the contact surface 70 of the first and second shock absorbing members 50 and 60 in the present invention is repeated a number of friction when bending, so that the retainer member and the smooth movement of the retaining member on the contact surface 70 to reduce the friction noise when sliding In order to prevent abrasion, lubricating coating may be included with a suitable surface treatment means such as graphite coating or insulation coating.

Therefore, this structure also enables the self-supporting function of the exhaust pipe (SELF SUPPORTING).

Therefore, the flexible connector for the exhaust pipe of the present invention is the curved guide portion of the rear sleeve 30 is fixed to the lower side of the inner retainer member 40 while the inner retainer member 40 moves in the bending direction when bending occurs. Each of the 31 is in contact with the first shock absorbing member 50 at the same time, it is possible to buffer the bending shock, the contact surface 70 of the second shock absorbing member 60 located inside the outer cover 80 in the upper direction ) Is able to mitigate the bending impact while sliding in the surface contact state.

According to the present invention as described above, the surface guide portion 31 of the rear sleeve 30 is curved to the radius of curvature R1 by a predetermined value from the displacement center point C of the bellows 10 when excessive bending occurs. The guide portion 41 of the inner retainer member 40 is also curved to the radius of curvature R2 by a predetermined value from the displacement center point C.

Therefore, the bending motion can be smoothly performed by any desired angle, and the first shock absorbing member 50 and the second shock absorbing member 60 are protected from the exhaust gas and the outside, thereby preventing corrosion and breakage due to departure and external exposure. Damage can be reduced.

Therefore, it is a very useful design such as to improve the durability and reliability of the product.

Claims (2)

A bellows 10 formed to have a predetermined width and size, maintaining airtightness of exhaust gas generated from an engine side, and absorbing expansion and bending; Located in the front portion inside the bellows 10, to protect the bellows 10, to allow the high-temperature exhaust gas to pass through the inside, and the seating jaw 21 is provided stepwise to the outside of the front body A front sleeve 20; A rear sleeve (30) formed at a rear side of the front sleeve (20) and having a curved guide portion (31) at an end portion of the body front portion; An inner retainer member 40 positioned outwardly of the rear sleeve 30; A first cushioning member (50) positioned between the seating jaw (21) and the bellows (10) of the front sleeve (20) to cushion the impact in the bending and stretching directions; A second buffer member (60) positioned outside the bent portion (41) of the inner retainer member (40) to cushion the bending impact; In the front sleeve 20 and one side is fixed, the other side is composed of an outer cover (80) positioned at a predetermined interval with the inner retainer member (40); The inner retainer member 40 has a guide portion 41 having a radius R2 around the displacement center portion C in an arc shape, and is formed on the contact surface between the first buffer member 50 and the rear sleeve 30. The outer surface of the first shock absorbing member 50 has a sliding curved surface portion 51 and a rear surface guide portion 31 having a curved guide portion 31 formed at a radius R1 around the displacement center portion C. Flexible connector for car exhaust pipe The flexible connector for an automobile exhaust pipe according to claim 1, wherein the outer cover (80) is bent and molded with a buffer member cover portion (81) that is bent to protect the end of the second buffer member (60).