KR19980060172U - Decoupler for Automotive Exhaust Pipe - Google Patents

Abstract

The present invention relates to a decoupler for a vehicle exhaust pipe (Decoupler), the first cover 10 is attached to the exhaust port side of the engine in a hollow cylindrical shape and the rim 11 is bent; A second cover 20 which is spaced apart from the first cover 10 at a predetermined distance and connected to the exhaust muffler and whose rim 21 is bent; A bellows 30 having both ends fixed to inner diameters between the first cover 10 and the second cover 20 to absorb vibrations and deformations formed between the engine and the muffler; A first pocket 41 and a second pocket 42 are formed to connect the first cover 10 and the second cover 20 to be separated from each other, and to face the rims 11 and 21, respectively. Union cover 40 is formed in both ends so that the flange 43; The first pocket 41 and the second pocket 42 are respectively filled with a ring-shaped buffer member 50 having an absorption function for displacement, so that the buffer member 50 directly to the hot exhaust gas Not exposed to prevent deterioration and high temperature corrosion.

Thus, its durability is improved and the absorption effect on displacement is increased.

In addition, the auxiliary buffer member 60 is interposed between the two buffer members 50 to exert a control function when the compression displacement is largely applied.

In addition, as a result of the buffer structure being located outside of the bellows, the inner diameter through which the exhaust gas passes is enlarged, so that the load on the back pressure is eliminated, so that the installation area of the vehicle can be expanded. .

Description

Decoupler for Automotive Exhaust Pipe

The present invention relates to a decoupler for an automobile exhaust pipe, and more particularly, to increase absorption displacement and to prevent the damper member from being exposed to exhaust gas, thereby improving durability and product reliability.

In general, the exhaust pipe for exhaust gas is connected to the engine, the connection portion is provided with a connection for absorbing vibration, shock, heat deformation and the like.

Several types of connectors are known, but US Pat. No. 5,514,15 is utilized as a connector having a relatively small structure. According to the structure of the US patent exhaust pipe connector, the ends of the hollow cylindrical inner and outer sleeves respectively connected to the engine side and the exhaust pipe side are bent oppositely to form a rim, and between the rims which are overlapping positions of the inner and outer sleeves. Place the cushion member in the 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 is fixed to the end cap is attached to the outside, depending on the purpose of the bellows in the form of a woven wrap is configured to the outside of the bellows. Therefore, one displacement portion that can be bent and stretched is formed at an approximately intermediate position where the sleeves are overlapped, so that the longitudinal displacement and the central axis angle before and after the exhaust pipe connection are crossed from the vibration of the engine or the impact generated during driving. Absorption of the cushioning member positioned between the rim and the bellows surrounding the outside with respect to the bending displacement of the absorber.

According to this structure, however, the displacement absorbing ability of the stretchable body is good, but the bending part or the shear displacement perpendicular to the axial line is one of the weakest points of the joint portion that elastically absorbs the displacement. That is, when a displacement is applied in a direction other than tension or compression, one buffer member formed between the rims lacks the ability to sufficiently absorb this displacement. In particular, when the displacement direction is a bending direction other than the linear direction coinciding with the axial direction, the rims located at the overlapping portions of the sleeves cannot be largely displaced by the resistance of the relatively hard buffer member, which has a disadvantage in that the bending angle is limited. will be. Therefore, when a bending displacement greater than this allowable displacement occurs, the inner and outer sleeves are in contact with each other, thereby generating noise and severely damaging the sleeve so that it cannot be used normally. Furthermore, in the vertical vibration of the exhaust pipe, i.e., the shear displacement, due to the behavior of the up and down components of the engine or the road surface vibration, the function for absorbing displacement cannot be performed at all.

On the other hand, in order to solve this problem, the applicant of the present invention in the Utility Model Registration Application No. 95-24415 in the domestic utility model registration of both sides separate the cover between the union cover 40 between the cushioning member filled in the connection portion and joint function It has been suggested to have.

Therefore, as a result of the joints being formed in two places, in particular, the bending displacement can be absorbed more largely, and also has a useful effect of more effectively absorbing the displacement in the shear direction.

However, according to the conventional decoupler structure for an automobile exhaust pipe configured as described above, the union sleeve and the two shock absorbing members are respectively provided in the exposed state of the inner diameter of the bellows.

Therefore, when the hot exhaust gas passes inside from the sleeve connected to the engine side, the exhaust gas is directly contacted with the exhaust gas, so that the shock absorbing performance and durability of the union sleeve and, in particular, the shock absorbing member are degraded and corroded. There was a Pedan.

An object of the present invention is to provide a decoupler for a vehicle exhaust pipe that can increase the absorption effect and durability by preventing degradation and high temperature corrosion.

Another object of the present invention is to provide a decoupler for an automobile exhaust pipe that has an excellent exhaust effect by expanding an inner diameter portion through which exhaust gas can pass.

Another object of the present invention is to provide a decoupler for an automobile exhaust pipe that enables control of a larger compression displacement.

1 is a cross-sectional view showing a structure of the present invention.

2 to 4 is a half sectional view showing another embodiment of the present invention.

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

10: first cover 11: rim

20: second cover 21: rim

30: Bellows 40: Union cover

41: First pocket 42: Second pocket

50: buffer member 60: auxiliary buffer member

70: guide member

The object of the present invention is a hollow cylindrical shape attached to the exhaust port side of the engine and the rim 11 is bent the first cover 10;

A second cover 20 which is spaced apart from the first cover 10 at a predetermined distance and connected to the exhaust muffler and whose rim 21 is bent;

A bellows 30 having both ends fixed to inner diameters between the first cover 10 and the second cover 20 to absorb vibrations and deformations formed between the engine and the muffler;

A first pocket 41 and a second pocket 42 are formed to connect the first cover 10 and the second cover 20 to be separated from each other, and to face the rims 11 and 21, respectively. Union cover 40 is formed in both ends so that the flange 43; The first pocket 41 and the second pocket 42 are respectively filled with a ring-shaped buffer member 50 having an absorption function for displacement is achieved.

Thus, by forming two displaceable joints, not only can the angle of displacement with respect to the bend be large, but also the displacement with respect to the stretching and shearing in the longitudinal direction can be more effectively absorbed.

In addition, since the buffer member 50 is operated from the outside in a state blocked from the exhaust gas, deterioration and high temperature corrosion by the exhaust gas are prevented.

In addition, the inner diameter portion through which the exhaust gas can pass is enlarged to increase the exhaust capacity, and it is possible to control a larger compression displacement.

Hereinafter, preferred embodiments of the present invention will be described in detail by the accompanying drawings.

1 and 2 show the basic configuration of the present invention in a half sectional view.

According to this drawing, the hollow tubular first cover 10 and the second cover 20 are spaced apart from each other by a distance between the bellows 30 at its inner diameter so as to have a connection state, respectively. One side of the first cover 10 is installed toward the engine, and the other side of the second cover 20 is installed in a state that can be connected to the exhaust pipe.

In addition, the rims 11 and 21 are bent to the inside and the outside of the first cover 10 and the second cover 20, which are spaced apart from each other. In FIG. 2 is illustrated by bending in a flange shape from the inside to the outside in FIG. 2.

As shown in FIG. 1, when the rims 11 and 21 on both sides are bent inward, a union cover 40 for connecting the first cover 10 and the second cover 20 that are separated from each other is positioned inside. .

The union cover 40 has a flange 43 is formed in a circular rim shape toward the outside to form a first pocket 41 and a second pocket 42 between the rims 11 and 21. The first cover 10 and the second cover 20 are connected in a continuous state.

Accordingly, the union sleeve 30 has a connecting body function to freely displace so that a bending displacement such as a joint is made at the overlapping positions of both the first cover 10 and the second cover 20 in a short tubular shape. In order to accommodate the shock absorbing member 40, the first pocket in the form of integrally extending the flange 43 to the first cover 10 and the second cover 20 in the direction of the rims (11) (21). 41 and the second pocket 42 are formed, respectively.

The shock absorbing member 50 is filled in the first pocket 41 and the second pocket 42, respectively, and elastically and longitudinally displaces and flexes displacement along with an impact from vibration of the engine or road vibration while driving. It is an elastic material that can be absorbed.

The shock absorbing member 50 is molded into a ring shape, and the material is semi-permanently possessed by semi-permanent elasticity to be restored after being compressed in any direction, and is easily woven with a thin wire in consideration of a more easily formed property. Compressed mesh is molded into a ring shape, the role and material configuration is the same as the conventional one, and thus a detailed description thereof will be omitted.

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

The bellows 30, which is positioned inside and fixed at both ends of the first cover 10 and the second cover 20, absorbs the displacement with respect to the stretch direction or the bending direction, and the first cover 10. And the second cover 20 is fixedly installed in the longitudinal direction while maintaining the sealing to prevent leakage of the exhaust gas passing through the interior.

This bellows 30 is to be restored when the external force is removed after absorbing the displacement and the like in the longitudinal direction and the bending direction mainly by repeatedly forming the wrinkles as shown in the figure.

On the other hand, the method of attaching the bellows (30) is usually fixed by welding both ends of the first cover 10 and the second cover 20, but is not necessarily limited to this, permanently fixed by any fixing means. All means for this will be included.

Then, at both ends and one end of the bellows 30, a guide member 70 for guiding the inner diameter to be moved without resistance when discharging the exhaust gas is installed so as to be welded at the same time during the fixing operation with the first cover 10. Done.

At this time, the guide member 70 may be attached to the first cover 10 and the second cover 20, respectively, but as shown in FIGS. It is effective to attach only to the first cover 10 connected to the side.

2 illustrates another embodiment of the present invention, and illustrates a state in which the union cover 40 is installed on the outside of the first cover 10 and the second cover 20.

That is, the rims 11 and 21 formed on the first cover 10 and the second cover 20 protrude outwards, and the buffer member 50 is disposed between the first rims 11 and 21. The flange 43 is molded toward the inner diameter in a state where the union cover 40 for accommodating between the 41 and the second pocket 42 is located outside.

Thus, the installation position of the union cover 40 and the shock absorbing member 50 is different from the inner diameter of the first cover 10 and the second cover 20 is different from the embodiment of FIG. The effect of preventing deterioration and high temperature corrosion obtained by blocking the inside and the outside from the exhaust gas by the bellows 30 can be obtained in the same manner.

In addition, the joints formed by the two first pockets 41 and the second pockets 42 allow a large angle of displacement with respect to bending, as well as more efficient stretching and shearing in the longitudinal direction. It can be absorbed.

On the other hand, Figure 3 is installed in the embodiment of Figure 1 in the compression direction by installing the auxiliary buffer member 60 in the space between the rim 11, 21 formed in the first cover 10 and the second cover 20 Displacement control and cushioning functions will be complemented.

At this time, one side of the first cover 10 to the second cover 20 to prevent the separation of the auxiliary buffer member 60, cover member 61 for covering the open outside of the auxiliary buffer member 60 Is attached by the method of welding.

In addition, FIG. 4 is to control the displacement in the compression direction through the ring-shaped auxiliary buffer member 60 in the space between the rims 11 and 21 in the embodiment of FIG.

Therefore, when the shock absorbing member 50, the auxiliary buffer member 60 and the bellows 30 are absorbed by displacement when the displacement is applied in all directions such as tension, compression, bending and shear, the initial force is removed again. Is to restore the state.

In particular, as a result of retaining two joints on both sides of the union cover 40, a larger amount of displacement can be obtained by angularly displacing each joint part, and a large bending angle tends to occur when approaching the engine side. To allow the displacement of

This means that by installing the exhaust pipe connector according to the present invention in close proximity to the engine side, it is excellent in absorbing displacements from various types of engine vibration even in a small structure.

Although not illustrated, intermittent indentations in the circumferential direction may be formed in the first and second pockets 41 and 42 formed by the first cover 10, the second cover 20, and the union cover 40. Each of the exhaust pipes is protruded toward the shock absorbing member 50 so as to be able to resist the torsional displacement of the exhaust pipe connected to both ends of the exhaust pipe connector by press-ining the shock absorbing member 50 so as not to flow in the circumferential direction. It is a means to extend the life of the connector.

According to the configuration of the present invention as described above, the buffer member 50 is not directly exposed to the high temperature exhaust gas can be prevented deterioration and high temperature corrosion.

Thus, its durability is improved and the absorption effect on displacement is increased.

In addition, the auxiliary buffer member 60 is interposed between the two buffer members 50 to exert a control function when the compression displacement is largely applied.

In addition, as a result of the buffer structure being located outside of the bellows, the inside diameter through which the exhaust gas passes is enlarged, so that the load on the back pressure is eliminated and the exhaust function can be expanded.

Claims (6)

A first cover 10 attached to an exhaust port side of the engine in a hollow cylindrical shape, the rim 11 being bent; A second cover 20 which is spaced apart from the first cover 10 at a predetermined distance and connected to the exhaust muffler and whose rim 21 is bent; A bellows 30 having both ends fixed to inner diameters between the first cover 10 and the second cover 20 to absorb vibrations and deformations formed between the engine and the muffler; A first pocket 41 and a second pocket 42 are formed to connect the first cover 10 and the second cover 20 to be separated from each other, and to face the rims 11 and 21, respectively. Union cover 40 is formed in both ends so that the flange 43; A decoupler for a vehicle exhaust pipe, characterized in that the first pocket 41 and the second pocket 42 are respectively filled with a ring-shaped buffer member 50 having an absorption function for displacement. The method of claim 1, wherein the buffer member 50 and the union cover 40 is the first cover 10 and the first cover 10 and the first cover 10 and the second cover 20 so as to be located between the bellows (30) The rims 11 and 21 formed on the cover 20 are bent from the outside to the inside, and the flange 43 of the union cover 40 is formed by being bent into a te shape from the inside to the outside. Decoupler for car exhaust pipe. The method according to claim 1, wherein the buffer member 50 and the union cover 40 is in the first cover 10 and the second cover 20 to be located outside the first cover 10 and the second cover 20. The rims 11 and 21 to be formed are bent outward from the inside, and the flange 43 of the union cover 40 is bent into a te shape from the outside to the inside to be decoupled for an automobile exhaust pipe. (Decoupler). The cover member of claim 2, wherein the auxiliary buffer member 60 is installed as a space between the rims 11 and 21 formed on the first cover 10 and the second cover 20. Decoupler for automobile exhaust pipe, characterized in that the installation is wrapped in (61). 4. The vehicle exhaust pipe according to claim 3, wherein an auxiliary buffer member 60 is provided as a space between the rims 11 and 21 formed on the first cover 10 and the second cover 20. Decoupler. The decoupler for vehicle exhaust pipe according to any one of claims 1 to 5, wherein a guide member (70) for inducing exhaust gas is fixedly attached to an inner diameter of the first cover (10). .