CN212563424U - Flexible festival structure of blast pipe - Google Patents

Abstract

The utility model provides a flexible festival structure of blast pipe, includes the bellows to and be located the dustcoat that the bellows outside cover was established, its characterized in that: the dustcoat includes first dustcoat and the second dustcoat that sets gradually along the axial of flexible festival, the position that first dustcoat and second dustcoat are connected is equipped with respectively and overlaps and follow the radial spaced first connecting portion and the second connecting portion of flexible festival along the axial of flexible festival, first connecting portion are located the outside of second connecting portion, establish the elastic component between first connecting portion and the second connecting portion. This blast pipe flexible festival structure can reduce the exhaust system's of the flexible festival other end vibrations, can support the weight of whole flexible festival moreover to and exhaust system's weight. And can prevent to take place and then around axial rotation, prevent the flexible festival because around the damage that axial twist and cause, guaranteed the life of flexible festival.

Description

Flexible festival structure of blast pipe

Technical Field

The utility model relates to an auto-parts especially relates to a flexible festival structure of blast pipe.

Background

A flexible joint for arrangement in an exhaust system of an automotive engine. One end of the exhaust system is connected with an engine manifold, other parts of the exhaust system are connected with a vehicle body bottom plate through lifting lugs, vibration and swing are generated during the work of the engine, the vibration and the swing can be transmitted to a vehicle body through the exhaust system, bad influence is generated on riding comfort, meanwhile, vehicle body vibration generated when a vehicle runs on a rough road surface can be transmitted to a front section of the exhaust system, the manifold and the engine through the exhaust system, and the same negative influence on NVH and durability is caused.

To ameliorate this problem, a flexible joint is often placed at the connection of the exhaust system to the engine manifold to dampen bi-directional vibrations, the flexible joint structure usually comprising an inner layer of metal bellows and an outer layer of mesh, the two layers being clamped together by end caps.

Currently, flexible segments are non-load bearing and load bearing. The non-bearing flexible joint has wider application. Wherein, the outer net sleeve generally adopts two structures. One is a knitted net structure, which is usually formed by knitting metal wires into a knitted structure, and since a part of each strand of the wire is almost freely moved to the periphery, the knitted net structure usually has a certain elasticity, and can be closely attached to the bellows within the elastic range, so that the vibration of the bellows can be effectively suppressed. Since the elastic range is large but the supporting capability is poor, the movement of the bellows cannot be restricted in a plurality of directions, and when a large swing occurs in each direction, the deformation range of the bellows cannot be restricted and the bellows is easily broken.

The other is a woven mesh structure, which is usually formed by interweaving a plurality of metal wires in two directions, has a compact appearance, has a certain self-supporting capability, but cannot bear a large load, such as the weight of a catalyst or a particle catcher.

The flexible joint provided with the mesh cover is generally easy to damage due to rotation around the axial direction, so that another difficulty in the application of the flexible joint is caused, and the torsion problem is more serious particularly in a longitudinally-arranged rear-drive vehicle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a can bear exhaust system's weight is provided, has stronger rigidity, can reduce the vibrations of mutual transmission between engine and the exhaust system simultaneously to can reduce around axial rotation and not fragile, can guarantee life's the flexible festival structure of blast pipe.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a flexible festival structure of blast pipe, includes the bellows to and be located the dustcoat that the bellows outside cover was established, its characterized in that: the dustcoat includes first dustcoat and the second dustcoat that sets gradually along the axial of flexible festival, the position that first dustcoat and second dustcoat are connected is equipped with respectively and overlaps and follow the radial spaced first connecting portion and the second connecting portion of flexible festival along the axial of flexible festival, first connecting portion are located the outside of second connecting portion, establish the elastic component between first connecting portion and the second connecting portion.

Preferably, the first connecting portion, the second connecting portion, and the elastic member are located at intermediate positions in an axial direction of the flexible joint.

Preferably, the cross-section of the first connecting part and the second connecting part is polygonal, petal-shaped, reverse petal-shaped or irregular.

Preferably, the first connecting part and the second connecting part are matched in shape and are correspondingly arranged in position.

Preferably, the cross section of the first connecting portion and the second connecting portion is a regular polygon, the number of sides is the same, and the sides of the first connecting portion and the second connecting portion are arranged corresponding to each other.

Preferably, the end of the first connecting portion is provided with a first bending portion bent inward, and the end of the second connecting portion is provided with a second bending portion bent outward.

Preferably, the first connecting portion is provided with a downward concave portion at a position corresponding to the second bent portion of the second connecting portion, and the second connecting portion is also provided with an outward protruding portion at a position corresponding to the first bent portion of the first connecting portion.

Preferably, the elastic member is a metal mesh.

Preferably, an inner lining pipe is arranged in the corrugated pipe.

Compared with the prior art, the utility model has the advantages of this flexible festival structure of blast pipe for the engine vibrations of flexible festival one end can be transmitted to the elastic component, and then reduces the exhaust system's of the flexible festival other end vibrations, and in addition, this flexible festival of blast pipe, the dustcoat can support the weight of whole flexible festival, and exhaust system's weight. In addition, in the structure of the flexible joint of the exhaust pipe, the elastic piece is positioned in the middle of the flexible joint, so that the effect of buffering stress is stronger, the elastic piece is convenient to install, and the elastic piece is not easy to damage. The structure of dustcoat is guaranteed to prevent that it from taking place around axial rotation, and the elastic component can also cushion and reduce around axial torsion moreover, and then, prevents that flexible festival from having guaranteed the life of flexible festival because around the damage that axial torsion caused.

Drawings

Fig. 1 is an axial sectional view of a flexible joint structure according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a flexible joint structure according to an embodiment of the present invention, taken along line a-a in fig. 1.

Fig. 3 is a cross-sectional view of an embodiment of the flexible joint structure of the present invention.

Fig. 4 is a cross-sectional view of another embodiment of the flexible joint structure of the present invention.

Fig. 5 is a cross-sectional view of another embodiment of the flexible joint structure of the present invention.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawing, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1, the flexible joint structure includes an inner lining pipe 1 and a corrugated pipe 2 sleeved outside the inner lining pipe 1. The outer side of the corrugated pipe 2 is sleeved with an outer cover 3. Of course, in some embodiments, the inner liner tube 1 may be omitted, and only the bellows 2 and the outer cover 3 may be provided.

The outer cover 3 comprises two sections which are sequentially arranged along the axial direction of the flexible joint, namely a first outer cover 31 and a second outer cover 32, the connecting positions of the first outer cover 31 and the second outer cover 32 are a first connecting part 33 and a second connecting part 34 respectively, the first outer cover 31 and the first connecting part 33 can be integrated, and the second outer cover 32 and the second connecting part 34 can be integrated; alternatively, the first cover 31 is integrated with the second connecting portion 34, and the second cover 32 is integrated with the first connecting portion 33. The first connecting portion 33 and the second connecting portion 34 are spaced radially inward and outward of the flexible joint and are arranged to overlap in the axial direction of the flexible joint, and the first connecting portion 33 and the second connecting portion 34 are located at intermediate positions in the axial direction of the flexible joint. An elastic member 5 is provided between the first connecting portion 33 and the second connecting portion 34, that is, the elastic member 5 is also located at the middle position of the flexible link. Such structure, not only be convenient for install, moreover, the elastic component sets up in the intermediate position of flexible festival, and the external force of flexible festival can more effectual buffering because the fixed other end of one end of flexible festival can the atress vibrations, and to the rotatory or luffing motion's that exerts on the flexible festival power, the power that elastic component 5 can cushion is bigger.

In this embodiment, the first housing 31 is integrated with the first connecting portion 33, the second housing 32 is integrated with the second connecting portion 34, and the first connecting portion 33 is located outside the second connecting portion 34. The elastic piece 5 is arranged, so that the outer cover 3 can enable the engine vibration at one end of the flexible joint to be transmitted to the elastic piece, further the vibration of the exhaust system at the other end of the flexible joint is reduced, and the outer cover of the exhaust pipe flexible joint can support the weight of the whole flexible joint and the weight of the exhaust system, so that the flexible joint is not easy to damage.

As shown in fig. 2, the first connection portion 33 and the second connection portion 34 have polygonal cross sections, which are different from circular rings, and the first connection portion 33 and the second connection portion 34 are provided such that the first connection portion 33, the second connection portion 34, and the elastic member 5 do not rotate around the shaft, and the relative positions of the three portions are fixed, so that even if torsion around the shaft occurs, the torsion force is absorbed by the elastic member 5 between the first connection portion 33 and the second connection portion 34, and the torsion force around the shaft is reduced. Therefore, the flexible joint of the exhaust pipe cannot twist around the shaft, and is not easy to damage.

It will be understood by those skilled in the art that the first connecting portion 33 and the second connecting portion 34 may have other structures, as long as the elastic member 5 can be fixed from the inner side and the outer side, and the rotation between the three parts can not occur. For example, the elastic member may be a regular polygon as shown in fig. 2, and the elastic member may also be a matching regular polygon ring, or the elastic member may be a circular ring, and after being compressed, the elastic member becomes a regular polygon ring between the first and second connecting portions, as long as the elastic member can be interference-filled between the first and second connecting portions, and the elastic member 5 may be a metal mesh for absorbing shock and torsion. When the cross sections of the first connecting portion 33 and the second connecting portion 34 are polygonal, the number of the sides of the first connecting portion 33 and the second connecting portion 34 may be the same, and the positions of the sides may correspond to each other, that is, the sides are arranged in a one-to-one correspondence; or the number of sides may be the same, but the positions are staggered with each other, as shown in FIG. 3; the number of sides of the first connecting portion 33 and the second connecting portion 34 may be different. The cross-section of the first connection portion 33 and the second connection portion 34 in fig. 2 is a regular polygon, but may be an irregular polygon. That is, the first connection portion 33 and the second connection portion may be matched in shape and position with each other, or may not be matched in position with each other.

The first connecting portion 33 and the second connecting portion 34 may have other cross-sections, preferably, the cross-sections are wave-shaped or petal-shaped, and as shown in fig. 4, the number of waves and the number of petals may be the same or different. It may also be in the shape of a reverse petal as shown in fig. 4, or in other irregular shapes. The first and second connection portions 33 and 34 may have a polygonal cross section, and each side of the polygonal cross section may have a concave surface, and each concave surface may be the same or different. The person skilled in the art is free to choose a number of configurations according to the principles described above.

In order to fix the position of the elastic member 5 in the axial direction between the first connection portion 33 and the second connection portion 34, as shown in fig. 1, in order that the first connection portion 33 is located outside the second connection portion 34, the end portion of the first connection portion 33 is provided with a first bent portion 331 bent inward, the end portion of the second connection portion 34 is provided with a second bent portion 341 bent outward, the elastic member 5 is provided between the first bent portion 331 and the second bent portion 341, and the first connection portion 33 and the second connection portion 34 are arranged so as to be overlapped inward and outward, and therefore, the first bent portion 331 and the second bent portion 341 are arranged so as to be shifted in the axial direction of the flexible joint, and the elastic member can be positioned from both sides in the axial direction of the flexible joint.

Preferably, a downward concave portion 332 is provided at a position corresponding to the second bent portion 341 of the second connection portion 34 in the first connection portion 33. And the second connecting portion 34 is also provided with a protrusion 342 protruding outward at a position corresponding to the first bending portion 331 of the first connecting portion 33, and the arrangement of the protrusion 342 and the recess 332 can better fix the axial position of the elastic member 5 on the flexible joint.

The first bent portion, the second bent portion, the concave portion, and the protruding portion may be provided continuously along one circle in the circumferential direction of the flexible joint, or may be provided in plurality at intervals in the circumferential direction of the flexible joint, as long as the elastic member can be positioned at the axial position of the flexible joint.

This flexible festival structure of blast pipe, the engine vibrations of flexible festival one end can transmit to the elastic component, and then reduce the vibrations of the exhaust system of the flexible festival other end, and this flexible festival of blast pipe, dustcoat can support the weight of whole flexible festival to and exhaust system's weight. In addition, the elastic part is positioned in the middle of the flexible joint, so that the effect of buffering stress is stronger, the elastic part is convenient to mount, and the elastic part is not easy to damage. In addition, in the structure of the flexible joint of the exhaust pipe, the structure of the outer cover can prevent the flexible joint from rotating around the axial direction, the elastic piece can buffer and reduce the torsion around the axial direction, and then the flexible joint is prevented from being damaged due to the torsion around the axial direction, and the service life of the flexible joint is ensured.

Although the preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a flexible festival structure of blast pipe, includes bellows (2) to and be located outer cover (3) that bellows (2) outside cover was established, its characterized in that: the outer cover (3) include first dustcoat (31) and second dustcoat (32) that set gradually along the axial of flexible festival, the position that first dustcoat (31) and second dustcoat (32) are connected is equipped with respectively and overlaps and follow the radial spaced first connecting portion (33) and the second connecting portion (34) of flexible festival along the axial of flexible festival, first connecting portion (33) are located the outside of second connecting portion (34), be equipped with between first connecting portion (33) and the second connecting portion (34) elastic component (5).

2. The exhaust pipe flexible joint structure according to claim 1, wherein: the first connecting portion (33), the second connecting portion (34), and the elastic member (5) are located at intermediate positions in the axial direction of the flexible joint.

3. The exhaust pipe flexible joint structure according to claim 1, wherein: the cross sections of the first connecting part (33) and the second connecting part (34) are polygonal, petal-shaped or reverse petal-shaped.

4. The exhaust pipe flexible joint structure according to claim 3, wherein: the first connecting part (33) and the second connecting part (34) are matched in shape and are correspondingly arranged in position.

5. The exhaust pipe flexible joint structure according to claim 3, wherein: the cross sections of the first connecting parts (33) and the second connecting parts (34) are regular polygons, the number of sides of the first connecting parts is the same, and the sides of the first connecting parts (33) and the second connecting parts (34) are arranged correspondingly.

6. The exhaust pipe flexible joint structure according to claim 1, wherein: the end part of the first connecting part (33) is provided with a first bending part (331) which is bent inwards, and the end part of the second connecting part (34) is provided with a second bending part (341) which is bent outwards.

7. The exhaust pipe flexible joint structure according to claim 6, wherein: a downward concave part (332) is arranged on the first connecting part (33) at a position corresponding to the second bending part (341) of the second connecting part (34), and a protruding part (342) protruding outwards is also arranged on the second connecting part (34) at a position corresponding to the first bending part (331) of the first connecting part (33).

8. The exhaust pipe flexible joint structure according to claim 1, wherein: the elastic piece (5) is a metal mesh.

9. The exhaust pipe flexible joint structure according to any one of claims 1 to 8, wherein: an inner lining pipe (1) is arranged in the corrugated pipe (2).

Images