DE202012008100U1 - Device for the vibration-decoupled connection of two devices of an exhaust system - Google Patents

Abstract

Device (1) for the vibration-decoupled connection of a first line element (14) to a second line element of an exhaust system, comprising a flexible metal hose (6) with a first, preferably at least partially bellows-shaped, wall portion (5) and a terminal, conically widening formed second wall portion (7) for coupling with the first conduit element (14) of the exhaust system,
characterized,
the second wall section (7) is formed integrally with the first wall section (5), or
in that the second wall section (7) is formed by a separate sleeve element (9), which sleeve element (9) is inserted into a smooth-cylindrical connection end (11) of the flexible metal hose (6) and fixed there in a force or material fit.

Description

The invention relates to a device for vibration-decoupled connection of two devices of an exhaust system according to the preamble of claim 1, a line element according to the preamble of claim 6 and a line connection according to claim 9.

Such connection devices often consist of a large number of components which have to be optimally interconnected to fulfill their function. They regularly have a first coupling region for coupling to a first device of the exhaust system and a second coupling region for coupling to a second device of the exhaust system. The length of a flexible hose element extending between the two coupling regions, preferably bellows, is decisive for the vibration decoupling and the required flexibility in the respective systems.

From the DE 203 17 596 U1 For example, a connection device is known which has a first and a second coupling region and a flexible tube arranged therebetween. In a coupling region of the hose is fixed by means of a weld cohesively to a connecting element for connection to a further device of the exhaust system. However, this embodiment has the disadvantage that the resulting device is complicated to assemble and overall relatively long builds, so that it is not suitable for use between close to each other devices of an exhaust system. In addition, when welding the components of the device can be damaged, which has a direct impact on the life or functionality of the device.

The object of the present invention is therefore to provide a cost-effectively manufacturable, functionally reliable and suitable for use in short installation space device for vibration-decoupled connection of two devices of an exhaust system.

The solution of the above is made by the device for vibration-decoupled connecting two devices of an exhaust system according to claim 1.

The device according to the invention for the vibration-decoupled connection of a first line element to a second line element of an exhaust system accordingly comprises a flexible metal hose with a first, preferably bellows-shaped, wall portion and with a second wall portion, which conically widened or flared terminally coupled for coupling with the first conduit element of the exhaust system is. According to the invention, the second wall portion is also in one piece, d. H. formed integrally with the first wall portion.

This solution is particularly advantageous because there are no joints due to the one-piece design of the metal tube, as is the case in the prior art. Thus, in the device according to the invention during assembly and in operation significantly less risk of damage to the device. The waiver of the said joint also means that the device according to the invention builds shorter in the axial direction, as was the case in the prior art.

Alternatively, it is provided for solving the problem that the second wall portion is formed by a separate sleeve member, which sleeve member is inserted into a smooth-cylindrical terminal end of the flexible metal hose and there fixed non-positively or cohesively. This is initially equivalent in effect to the above-described extension or widening of the end of the flexible metal hose, in particular the widening of the bellows brim, and also avoids excessive axial expansion of the assembly.

In the course of a corresponding development can also be provided that the sleeve member extends axially reducing its diameter in the first, preferably at least partially bellows-shaped, wall portion of the flexible metal hose, most preferably in the manner of a flame tube. In addition, the sleeve member can be used in this way as a connection for an inner component (preferably a liner or winding tube).

According to another preferred embodiment of the present invention, the second wall section superimposed - at one piece embodiment of the first wall section and the second wall section according to the first alternative - at least partially in the radial direction a pipe element. This pipe element corresponds in a certain way to the previously mentioned sleeve element, but in principle applies to the pipe element that this only enhances the expanded second wall portion of the metal hose, while said second wall portion itself is provided for coupling to the first conduit element of the exhaust system. Conversely, the sleeve element itself serves for coupling with the first conduit element of the exhaust system, by the expanded second wall portion of the metal tube forms and thus extends axially beyond the first, preferably at least partially bellows-shaped, wall portion addition.

The pipe element is preferably shaped at least in sections corresponding to the second wall section of the metal hose. Like the sleeve element, the pipeline element can also extend into the region of the first wall section of the metal hose, wherein it is also preferably formed here according to this first wall section of the metal hose.

This embodiment is advantageous since the first or the second wall section of the metal tube, which in practice is relatively thin-walled, is so spaced from the hot fluid flow of the exhaust system. The pipe element thus serves as a flame tube or can be referred to as a flame tube. Also in this respect it corresponds to the said sleeve element in a corresponding embodiment of the invention.

In the sense of a further embodiment of the present invention, the first wall section and / or the second wall section of the metal hose are in contact with the pipe element. The first and second wall sections of the metal hose thus preferably substantially completely cover the pipeline element in the axial direction.

This refinement leads to the advantage that the metal hose and the pipe element can preferably be fixed in a form-fitting manner relative to one another, in particular directly to one another. The pipe element is thus used in particular for the mechanical reinforcement of the metal hose.

According to another preferred embodiment of the present invention, the strength of the pipe member is higher than the strength of the second wall portion. Strength in this case is understood in particular to be the mechanical load capacity in the radial direction. The strength can be z. B. result by using different materials and / or different material thicknesses. The same can apply accordingly for the sleeve element.

This embodiment is advantageous since the metal hose as a whole can be very thin and therefore flexible and lightweight, while still ensuring sufficient strength for coupling to the first conduit element. The pipe element or the sleeve element thus serves - as already mentioned - as a structural amplifier and / or protective device for the metal hose.

The invention is further directed to a conduit element of an exhaust system according to claim 6. According to the invention, such a conduit element comprises a tubular body having a first conical wall portion and a second conical wall portion adjoining it, wherein the first conical wall portion and the second conical wall portion are inclined relative to each other, and wherein at least the second conical wall portion is a substantially cylindrical one Connecting pipe section for coupling with another device of the exhaust system. Here, the first conical wall portion for cooperation with the conical wall portion of a device according to any one of claims 1 to 5 is formed. Alternatively, the cylindrical tube section adjoining the second conical wall portion may itself already be part of the further device of the exhaust system.

Such a line element is advantageous because it allows the use of a device according to the invention for the vibration-decoupled connection of two devices of an exhaust system, whereby a very space-saving arrangement can be realized.

According to a further advantageous embodiment of the present invention, said further device is a (combustion) engine of a motor vehicle, in particular a car or a truck.

This is advantageous because the smaller and more space-saving the individual components of the device according to the invention can be realized, the less mass must be installed in a vehicle and thus transported, whereby the material costs and especially the maintenance costs, especially the fuel consumption can be reduced.

Furthermore, in the context of a further embodiment, preferably the first conical wall portion of the conduit element and the first conical wall portion of the device or a conical wall portion of the pipe element or a conical wall portion of the sleeve member are flat against each other or are in surface contact with each other. This can be achieved in particular by an inclination of the conical wall portion of the device or the metal hose relative to a longitudinal axis of the device corresponds approximately to an inclination of the first conical wall portion of the conduit element, wherein said conical portions or portions advantageously also in can have approximately equal longitudinal extent.

This embodiment is advantageous because the flat concerns a high sealing effect and thus a very low-loss and functionally reliable arrangement is proposed.

The invention is further directed to a conduit connection for connecting a conduit member to a device of an exhaust system according to claim 9. According to such a line connection, a device according to one of claims 1 to 5 and a line element according to one of claims 6 to 8 are superimposed to form a fluid-tight connection in a common contact region by a connecting means and non-positively connected to each other by actuation or activation of the connecting means ,

Such a line connection is advantageous because a functionally reliable coupling of two elements of an exhaust line can be produced in a simple manner by the generation of a frictional connection.

According to a further preferred embodiment of the present invention, the connecting means in the manner of a clamp with two mutually inclined aligned active surfaces formed (so-called V-clamp), wherein the active surfaces of the clamp are formed such that it substantially positive fit the conical wall portions of the conduit member overlap and record.

This embodiment is advantageous because centering of the connecting means and thereby a precise introduction of force to generate the frictional connection is ensured by the mutually inclined aligned active surfaces.

Advantageously, the second conical wall section of the device or of the metal tube is furthermore arranged between one of the active surfaces of the connecting means and the first conical wall portion of the conduit element. In this case, the other active surface of the connecting means preferably bears directly contacting the second conical wall portion of the first conduit element.

Further advantages, objects and features of the invention will be explained with reference to the description of the appended figures, in which an example of a device for vibration-decoupled connection of two devices of an exhaust system or their components are shown. Components of the device, which essentially correspond in the figures with regard to their function, can hereby be identified by the same reference symbols. It shows:

1 a first schematic sectional view of the device according to the invention for vibration-decoupled connecting two pipe parts;

2 a sectional view of a first component of the device according to the invention for vibration-decoupled connecting two pipe parts in a specific embodiment;

3 a sectional view of a second component of the device according to the invention for the vibration-decoupled connecting two pipe parts in a specific embodiment;

4 another embodiment of the present invention;

5 a still further embodiment of the present invention;

6 a schematic detail of individual components of the device according to the invention, in a coupled state together;

7 a perspective view of the device according to the invention; and

8a C shows another embodiment of the present invention.

In 1 is a part of the device according to the invention 1 shown in a sectional view. It is in the device according to the invention 1 essentially a hose-like element or a metal hose 6 and thus in particular a rotation body. The lower portion of the device according to the invention, not shown in the sectional plane 1 is therefore omitted for reasons of simplification, since its shape due to the rotational body property opens up immediately.

The device 1 has a first end 8th , a second end 10 and a flexible and preferably multi-layer wall area extending at least in sections longitudinally therefrom. The wall area is preferably an internal component 38 , preferably inner liner or braid, a middle component 40 in the form of a bellows-type metal tube and an outer component 42 , preferably braided or knitted tube formed. It is possible, however, to one or two of the aforementioned components 38 . 42 to renounce. Furthermore, it is possible that in addition to the aforementioned components 38 . 40 . 42 nor one or more other components (not shown) form the wall area with.

Preferred are the first and the second end 8th . 10 differently designed. The first end preferably has a substantially smooth cylindrical first wall section 5 on, integrally connected to a preferably conically widened trained second, terminal wall section 7 axially connected. Further, at the first end 8th preferably a pipe element or connecting means 24 provided, which is also designed in particular as a rotational body and of the conical second wall portion 7 is radially superimposed or surrounded. The connecting means 24 is preferably made of metal and has in the longitudinal direction X an at least partially varying inner diameter. The inner diameter particularly preferably increases with increasing distance to the second end 10 to. The connecting means 24 therefore forms at its from the second end 10 farthest end portion of a cone-shaped portion or a V-board.

Preferably, the connecting means acts 24 as a protective element that holds the metal hose 6 or the bellows component 40 protects at least in sections before thermal admission by the exhaust gas or the combustion fluid of the exhaust system. The connecting means 24 thus preferably also assumes the function of a flame tube.

The second end 10 the device 1 is preferably designed such that the components 38 . 40 . 42 by means of a further tubular device 45 be superimposed in the form of a ferrule. The other tubular device 45 in this case preferably has two mutually inclined wall portions 46 . 47 on. The first wall part 46 extends inclined to the longitudinal direction X, in particular approximately orthogonal to the longitudinal direction X, and the second wall portion 47 preferably extends in the longitudinal direction X, in particular parallel to the longitudinal direction X. The further tubular device 45 is preferably made of metal and is particularly preferably at least via a non-positive connection with the components 38 . 40 . 42 to bind the latter together. The second end 10 of the metal hose 6 is preferably in direct contact with the second conduit member (not shown), which is by means of the device 1 with the first conduit element 14 is connected.

In 2 is a tubular first conduit element 14 shown, which acts as a connection element. The connection element 14 serves to connect the metal hose 6 with a further device of an exhaust system, for example an exhaust gas outlet of an internal combustion engine (not shown). The line or connection element 14 has a first conical wall portion 12 on, which is preferred for flat concerns on the connecting means 24 or the conical wall section 7 (see. 1 ) is trained. Furthermore, on one side of the first conical wall portion 12 a preferably smooth-cylindrical pipe section or wall portion 20 intended.

At the conical wall portion 12 on the other hand closes another conical wall portion 18 at. The two conical wall parts 12 . 18 In terms of amount, they have approximately the same angle of inclination with respect to an imaginary plane oriented orthogonally to the longitudinal direction X. However, it is also possible that the conical wall portions 12 . 18 have different angles of inclination relative to a plane oriented orthogonal to the longitudinal direction X.

At the other conical wall portion 18 closes a second, preferably smooth cylindrical wall portion 22 at. Furthermore, it can be seen that the first cylindrical wall portion 20 only a fraction of the length of the second cylindrical wall portion 22 having. Preferably, the second cylindrical wall portion 22 that is, a multiple, in particular exactly or substantially a 2, 3 or generally n-fold, the length of the first cylindrical wall portion 20 on.

The pipe element 14 is preferably made of metal.

3 shows a detailed view of the connecting means 24 , The reference number 26 indicates a preferably exactly or substantially smooth cylindrical tubular portion of the connecting means 24 , to which the conical wall section 28 followed. The cylindrical section 26 has an outer surface 30 preferably from the first wall section 5 of the metal hose 6 superimposed (cf. 1 ). An inner surface 34 of the conical wall part 28 serves to contact the connection element 14 (see. 2 ), and an outer surface 32 of the conical wall portion 28 is preferred from the wall portion 7 superimposed on the bellows (cf. 1 ) and is at least indirectly with a fixative 16 (see. 4 to 7 ), in particular a V-pipe clamp 48 , can be brought into contact.

The fixative 16 , which is preferred as a V-clamp 48 is formed, preferably has two mutually inclined aligned wall parts. The wall parts can be used as a first and a second leg 50 . 51 be viewed (see. 5 ). The first leg 50 superimposed on the conical wall portion 12 of the connection element 14 and preferably at least in sections, the conical wall section 28 of the bonding agent 24 and / or the conical wall section 7 of the metal hose 6 , The second leg 51 is preferably at least partially planar at the other conical wall portion 18 of the connection element 14 at. By the fixative 16 becomes an at least partially in the radial direction and an at least partially acting in the axial direction pressing force on the underlying components 7 . 14 . 24 exercised.

In 4 is an embodiment of the metal tube 6 shown without connecting means. The metal hose 6 or its end 7 acts in the manner illustrated with the fixing agent 16 . 48 and the connection element 14 together.

In 5 is an embodiment of the metal tube 6 with connecting means 24 shown, wherein the connecting means 24 from the metal hose 6 or the conical wall section 7 superimposed or enclosed on the outside. The metal hose 6 is thus as a layer between the fixing agent 16 and the connection element 14 educated. Preferably, the first leg acts 50 of the fixing agent 16 directly contacting with the metal hose 6 together. Furthermore, the metal hose 6 and the connecting means 24 Preferably coupled at least non-positively with each other, it is conceivable that they are alternatively or additionally positively or materially connected to each other.

In 6 a detail is shown according to which the individual components 38 . 40 . 42 of the hose 6 and their preferred arrangement in the region of the first end 8th the device 1 are shown. It can be seen from the illustration that preferably all components 38 . 40 . 42 at least in sections of a (final) sleeve 44 are enclosed.

Furthermore, the metal tube covers 6 or its end 7 in the longitudinal direction X, the connecting means 24 Completely.

7 shows a V-clamp arrangement 48 , as it can also be used in the context of the present invention. The clamp arrangement 48 has a metal hose end 7 and conduit element 14 formed double cone 54 Both sides encompassing part ring 49 on, whose ends are movable to each other for adjusting a contact force.

The 8a to c show a further embodiment of the present invention according to the second alternative, according to which the first and the second wall portion of the flexible metal hose are not integrally formed, but according to which the second wall portion is formed by a separate sleeve member. This sleeve element is in the 8a to c with the reference numeral 9 designated. It is in a smooth cylindrical connection end 11 of the metal hose 6 inserted, as can be seen in particular from the enlarged view in 8b results. There is the sleeve element 9 non-positively (for example by compression) or materially fixed (for example, by welding).

Otherwise correspond in the 8a to c those elements which are denoted by the same reference numerals, the corresponding elements of the 1 to 7 , so that will not be discussed again in detail.

The metal hose 6 can according to 8a at reference numerals 6a have a smooth cylindrical central region by the outer component 42 , here a metal knit, flat lies. However, this is not the subject of the present invention, so that is not discussed here.

Essential in the embodiment according to the 8a to c, as already mentioned, that the second wall section 7 , which for connecting to the connecting element 14 serves, not in one piece with the first wall section 5 of the metal hose 6 is formed, which first wall section 5 in the present case the already mentioned smooth-cylindrical connection end 11 in 8b ) corresponds. Rather, said second wall section 7 through the out of the metal hose 6 outstanding end of the sleeve element 9 formed, the basic shape of which in particular the 8b good to remove. Accordingly, the sleeve member 9 from right to left first the conically widened second wall section 7 on, on which a smooth cylindrical section 9a connects, which is concentric with the smooth cylindrical terminal end 11 is arranged. This is followed by another, conically tapering section 9b , which is another smooth cylindrical section 9c followed. The last mentioned section 9c extends into the flexible metal hose 6 into it and forms a kind of flame tube, in particular for the protection of bellows shafts of the metal hose. To the section 9c of the sleeve element 9 an inner component, for example in the form of a liner or winding tube, be connected, which is in the 8a to c is not shown.

The connection between sleeve element 9 and the connection end 11 of the metal hose 6 can cohesively or - as shown - non-positively by compression by means of the sleeve 4 and 40 respectively. The connection of the device 1 and the connection element 14 takes place, as already described, frictionally using the connecting means 16 (Pipe clamp), (V-clamp 48 ).

LIST OF REFERENCE NUMBERS

1

contraption

5

First wall section

6

metal hose

7

Second wall section

8th

First end

9

sleeve member

9a

Section (from 9 )

9b

Section (from 9 )

9c

Section (from 9 )

10

Second end

11

Connecting end (from 6 )

12

Conically trained wall portion

14

Connection element / tubular body / first conduit element

16

Fixing / connection means

18

Further / second conical wall portion

20

First cylindrical wall part

22

Second cylindrical wall portion

24

Connecting means / pipe element

26

Cylindrical wall

28

Conical wall section

30

Outer surface of the cylindrical wall section

32

Outer surface of the conical wall section

34

Inner surface of the conical wall

38

internal component

40

Medium component

42

external component

44

shell

45

Tubular device

46

First wall fraction

47

Second wall fraction

48

pipe clamp

49

partial ring

50

First leg

51

Second thigh

54

double cone

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 20317596 U1 [0003]

Claims (11)

Contraption ( 1 ) for vibration-decoupled connection of a first line element ( 14 ) with a second conduit element of an exhaust system, comprising a flexible metal hose ( 6 ) with a first, preferably at least partially bellows-shaped, wall portion ( 5 ) and a terminal, conically widened second wall section ( 7 ) for coupling with the first conduit element ( 14 ) of the exhaust system, characterized in that the second wall section ( 7 ) in one piece with the first wall section ( 5 ) is formed, or that the second wall section ( 7 ) by a separate sleeve member ( 9 ), which sleeve element ( 9 ) into a smooth-cylindrical connection end ( 11 ) of the flexible metal hose ( 6 ) is plugged in and there fixed force or cohesively. Contraption ( 1 ) according to claim 1, characterized by a pipeline element ( 24 ), which, in one-piece embodiment of the first wall section ( 5 ) and the second wall section ( 7 ), at least in sections in the radial direction of the first wall portion ( 5 ) and / or from the second wall section ( 7 ) is surrounded. Contraption ( 1 ) according to claim 2, characterized in that the first wall section ( 5 ) and / or the second wall section ( 7 ) contacting the pipeline element ( 24 ) is present. Contraption ( 1 ) according to claim 2 or 3, characterized in that the strength of the pipeline element ( 24 ) is higher than the strength of the first wall section ( 5 ) and / or the second wall section ( 7 ), in particular that the pipeline element ( 24 ) has a greater material thickness than the first wall section ( 5 ) and / or the second wall section ( 7 ) having. Contraption ( 1 ) according to claim 1, characterized in that the sleeve element ( 9 ) while reducing its diameter axially in the first, preferably at least partially bellows-shaped, wall portion ( 5 ) of the flexible metal hose ( 6 ) extends, most preferably in the manner of a flame tube. Conduit element ( 14 ) of an exhaust system comprising a tubular body having a first conical wall portion ( 12 ) and an adjoining second conical wall portion ( 18 ), wherein the first conical wall portion ( 12 ) and the second conical wall portion ( 18 ) are inclined to each other, and at least to the second conical wall portion ( 18 ) a substantially cylindrical pipe section ( 22 ), which is designed for coupling with a further device of the exhaust system or which is part of the said further device of the exhaust system, characterized in that the first conical wall portion ( 12 ) for cooperation with the conically shaped wall section ( 7 ) a device ( 1 ) is formed according to one of the preceding claims, preferably by an inclination of the conical wall portion ( 7 ) with respect to a longitudinal axis of the device of an inclination of the first conical wall portion ( 12 ) of the conduit element ( 14 ) corresponds approximately. Conduit element ( 14 ) according to claim 6, characterized in that the further device is an engine or engine part of a motor vehicle with internal combustion engine. Conduit element ( 14 ) according to claim 6 or 7, characterized in that the first conical wall portion ( 12 ) of the conduit element ( 14 ) and the conical wall section ( 7 ) of the device ( 1 ) or a conical wall section ( 28 ) of the pipeline element ( 24 ) or a conical wall section of the sleeve element ( 9 ) can be placed flat against each other. Line connection for connecting a line element ( 14 ) with a device of an exhaust system, wherein a device according to one of claims 1 to 5 and a line element ( 14 ) according to one of claims 6 to 8 for forming a fluid-tight connection in a common contact region of a connecting means ( 16 ) are superimposed and positively connected with each other. Cable connection according to claim 9, characterized in that the connecting means ( 16 ) a clamp ( 48 ) with two mutually inclined aligned active surfaces, preferably a V-clamp, wherein the active surfaces are formed such that they the conical wall portions ( 12 . 18 ) of the conduit element ( 14 ). Cable connection according to claim 9 or 10, characterized in that between an active surface of the connecting means ( 16 ) and the first conical wall portion ( 12 ) of the conduit element ( 14 ) the second wall section ( 7 ) of the device ( 1 ) is arranged.

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