EP3130791A1 - Subassembly for an intake tract of a combustion engine - Google Patents

Abstract

The invention relates to an assembly (1), with a first tubular body (2a) extending along a first longitudinal direction (L 1), which has a first opening (4a) on a first end face (3a), with at least one second tubular body (2b) extending along a second longitudinal direction (L2), which has a second opening (4b) on a second end face (3b), - wherein the first end face (3a) of the first tubular body (2a) is arranged obliquely to the first longitudinal direction (L 1) and the second end face (3b) of the second tubular body (2b) is arranged obliquely to the second longitudinal direction (L 2) - wherein in a state attached to the second tubular body (2b) of the first tubular body (2a), the two longitudinal directions (L 1, L 2) are substantially parallel to each other and the end faces (3a, 3b) of the two tubular body (2a, 2b) along the longitudinal directions (L 1, L 2) are arranged substantially parallel or at an acute angle to each other, - One of the two tubular body (2a, 2b) along the respective longitudinal direction (L 1, L 2) reversibly compressible line section (7b).

Description

The invention relates to an assembly for an intake tract of an internal combustion engine, in particular for an air filter, and an air filter with at least one such assembly. The invention further relates to a method for fastening two tubular bodies of the assembly together.

Tubular bodies, typically made of plastic, serve as an air duct between an air intake opening and an internal combustion engine. The tubular body preferably forms an intake passage to the filter housing. Such tubular body can be mounted with one of its two end-side openings on the filter housing, for which purpose a complementary formed to the mounting portion of the tubular body counterpart can be provided on this.

Such an air duct is for example from the DE 20 2006 012 636 U1 known. Said air duct can be connected by means of a snap connection with a filter housing. For this purpose, the air duct and the filter housing are put together along a mounting direction and fixed together by means of a latching connection. The respective end faces of air duct and filter housing extend at right angles to the mounting direction, so that the two components meet each other surface. For mounting the two parts together, the so-called corrugated pipe section of the air duct must be compressed in order to put the mounting sections of air duct and filter housing into one another. However, this process proves to be time-consuming and in practice often requires the use of several workers.

Against this background, it is an object of the present invention to provide an improved assembly with two tubular bodies, which in particular characterized by a simplified possibility of mounting the two tubular body to each other.

This object is solved by the subject matter of the independent patent claims. Preferred embodiments are subject of the dependent claims.

The basic idea of the invention is accordingly to make the opening-side end faces of two interconnected tubular bodies of an assembly oblique with respect to their respective longitudinal direction. In this way, an undesirable lateral collision of the two components to be fastened to each other can be avoided if they are initially aligned transversely to the actual mounting direction each other, because the two tubular body according to the invention with oblique front sides touch only shortly before reaching the final assembly position. The orientation of the two tubular bodies to each other transversely to the actual mounting direction is much easier to accomplish in the presented here tubular bodies with oblique front side than in conventional tubular bodies with right-angled end faces. For this purpose, a reversibly compressible line section is provided in one of the tubular body, which causes a longitudinally directed displacement of at least one of the end faces by acting transversely to the longitudinal direction of assembly forces. After the tubular bodies are in the joining position, the compressed line section can be expanded again, thus enabling a connection of the tubular body by the formation of an overlap region. As a result, this leads to a greatly simplified assembly of the two tubular body together.

The compressible line section may be formed by an elastic material, in particular an elastomer tube, or by a telescopically movable structure.

The remaining mounting path along the mounting direction can be realized in an advantageous embodiment of the invention by axial expansion of a bellows, which can be integrated in said tubular body.

An assembly according to the invention comprises a first tubular body extending along a first longitudinal direction and having on a first end face a first opening for fastening the first tubular body to a second tubular body. The assembly further includes a second tubular body extending along a second longitudinal direction and having a second end for attaching the second tubular body to the first tubular body at a second end face. The first end side of the first tubular body is arranged in a longitudinal section along the first longitudinal direction obliquely to the first longitudinal direction. The second end face of the second tubular body is arranged in a longitudinal section along the second longitudinal direction obliquely to the second longitudinal direction. The longitudinal directions of the two tubular bodies can each be defined by a main flow direction of the air flowing through the tubular body. In an attached state of the two tubular body, the two longitudinal directions are substantially parallel to each other, and the end faces of the two tubular bodies are arranged in the longitudinal section along the longitudinal directions substantially parallel to each other.

By "substantially" herein is meant that also embodiments are included, which may differ slightly from an exactly parallel orientation, as long as this does not interfere with the assembly, ie in particular the insertion or insertion of a tubular body in or on the other tubular bodies. In a preferred embodiment, deviations from the exactly parallel orientation of the two tubular bodies are up to 2 °, particularly preferably up to 1 °, most preferably up to 0.5 °.

Alternatively, the end faces of the tubular body according to the invention can also extend at an angle to each other. Here, in the mounting direction arranged below the front side has a slope with a larger angle. The front side in the mounting direction has a bevel with a smaller angle. Thus, an overlap area is formed between the end faces, which is larger in the lower area than in the upper area.

Preferably, the acute angle is at most 45 °, preferably less than 30 °, more preferably between 5 ° and 15 °. Such a geometry supports a particularly simple assembly of the tubular body.

In a further preferred embodiment, the second tubular body can be inserted into the first tubular body or can be plugged onto it, or vice versa. This allows a simple way airtight, yet releasable attachment of the two tubular body of the assembly together.

Said insertion process of the second tubular body in the first tubular body can be further facilitated if formed in an advantageous development on a peripheral wall of the second tubular body in the region of its frontal opening a circumferentially extending, outwardly projecting web. This web acts for the inserted into the first tubular body second tubular body as a stop for the insertion movement along the first longitudinal direction. Said bridge can completely or partially circulate in the circumferential direction. Instead of a web and the formation of a projection is conceivable which projects radially outward from the peripheral wall.

Particularly advantageously, the first tubular body in the longitudinal section along its first longitudinal direction on an upper body wall. A wall length of this Upper body wall is shorter than a wall length of the upper body wall opposite lower body wall, or vice versa. In addition, the second tubular body has an upper body wall in the longitudinal section along its second longitudinal direction. The wall length of this upper body wall is longer than a wall length of a lower body wall opposite the upper body wall, or vice versa. In this variant, the two wall lengths of the first tubular body with respect to a virtual first reference plane are measured transversely to the first longitudinal direction. The two wall lengths of the second tubular body are measured transversely to the second longitudinal direction with respect to a virtual second reference plane. Experimental experiments have surprisingly shown that by means of the above-described geometry of the two tubular body, the insertion or attachment of a tubular body in or on the other tubular body compared to conventional tubular bodies can be significantly improved.

In an attached state of the two tubular bodies, a sum of the wall length of the upper body wall of the first tubular body and the wall length of the upper body wall of the second tubular body is equal to the sum of the wall length of the lower body wall of the first tubular body and the wall length of the lower body wall of the second tubular body. This property of the two tubular body results in that an advantageous, straight-line connection between the two tubular bodies fastened to one another is formed.

In another preferred embodiment may be provided in the second tubular body, with respect to its longitudinal direction at a distance from the opening a bellows-like trained longitudinal portion. This is preferably designed such that a length of the second tubular body along its second longitudinal direction is variable up to a predetermined variation length. This property of the tubular body facilitates the insertion / pushing or plugging / plugging of one tube body in the other tube body by maximum expansion of the bellows-like longitudinal portion in the longitudinal direction, after the two tube bodies have previously been arranged in alignment with each other by a movement transverse to the longitudinal direction. Furthermore, the bellows-shaped longitudinal section can be compressed during the merging of the two tubular body and only after the two tubular body are arranged in alignment, be extended again in the longitudinal direction to effect a connection between the two tubular bodies.

Particularly preferably, the first end face of the first tubular body in the longitudinal section along the first longitudinal direction forms a first angle between 90 ° and 180 ° with the first longitudinal direction. Preferred angle values for the first angle are between 100 ° to 150 °, particularly preferably about 120 °. Alternatively or additionally, in the longitudinal section along the second longitudinal direction, the second end face of the second tubular body forms a second angle between 90 ° and 180 ° with the second longitudinal direction. Preferred angle values for the second angle are between 100 ° to 150 °, particularly preferably about 120 °. In further embodiments, the second angle may be greater than the first angle, whereby an overlap area between in the upper region is smaller than in the lower region. In this way, a particularly reliable recording is formed.

A mechanically stable, yet easy to be solved attachment of the two tubular body to each other can be achieved in a further preferred embodiment, in which a latching connection or snap connection is formed on the two tubular bodies. Said latching connection or snap connection can comprise at least one latching element, preferably in the manner of a projection, on one of the two tubular bodies and a recess complementary thereto, in particular a passage opening.

In another preferred embodiment, in each case a guide structure for guiding the respective other tubular body is formed on the inside or outside of a tube wall of the first and / or second tubular body in the region of the first or second opening. This facilitates in particular the insertion or plugging of a pipe body into or onto the other pipe body.

In another preferred embodiment, the first and / or second tubular body on a sealing means for sealing the bounded by the tubular bodies interior against the external environment. In this way it can be ensured that the air flowing through the two tubular bodies in a state mounted to one another can not escape outward into the outer environment of the tubular bodies in the connection region of the two tubular bodies. For this purpose, the sealing device may comprise one or more suitably designed sealing rings, preferably in the form of O-rings of a rubber-elastic material, particularly preferably of an elastomer.

If the assembly is to be used as part of an air filter, it is proposed in a particularly preferred embodiment of the invention to form the first tubular body as a fastening nozzle of a filter housing, from which the first tubular body, ie away from the housing housing bounded by the filter housing, projects away from the outside.

In an advantageous development, the filter housing comprises at least two first pipe bodies designed as fastening sockets. For each attachment piece, a second pipe body is present, so that in each case designed as a fixing piece connection, a second pipe body is fastened or fixed. In this way, a plurality of pipelines, each with the formation of an assembly according to the invention can be attached.

The invention further relates to an air filter with a filter housing and a previously presented assembly.

1. a) Anordnen des ersten Rohrkörpers im Abstand zum zweiten Rohrkörper derart, dass die erste Längsrichtung im Wesentlichen parallel zur zweiten Längsrichtung verläuft, dass die beiden Rohrkörper bezüglich der ersten Längsrichtung im Abstand zueinander angeordnet sind, und dass sie bezüglich einer Querrichtung senkrecht zur Längsrichtung versetzt zu einander angeordnet sind,
2. b) Bewegen des ersten Rohrkörpers oder des zweiten Rohrkörpers in Querrichtung, bis der Versatz der beiden Rohrkörper zueinander in der Querrichtung einen Null-Wert annimmt,
3. c) Aneinanderfügen der beiden Rohrkörper durch Bewegen des ersten Rohrkörpers entlang der ersten Längsrichtung zum zweiten Rohrkörper hin oder umgekehrt.

The invention also relates to a method for fastening two tubular bodies of the above-presented assembly together. That procedure involves the following steps:

1. a) arranging the first tubular body at a distance from the second tubular body such that the first longitudinal direction is substantially parallel to the second longitudinal direction, that the two tubular bodies with respect to the first longitudinal direction are spaced from each other, and that they are offset with respect to a transverse direction perpendicular to the longitudinal direction are arranged one above the other
2. b) moving the first tubular body or the second tubular body in the transverse direction until the offset of the two tubular bodies assumes a zero value in the transverse direction,
3. c) joining the two tubular bodies by moving the first tubular body along the first longitudinal direction to the second tubular body or vice versa.

In a variant of this method, according to a method step c ') alternative to step c), at least one of the tubular bodies can be axially compressed until the offset of the two tubular bodies in the transverse direction assumes the zero value. After the required positioning of the compressed tubular body is expanded again to connect the two joining partners together.

Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

Fig. 1

ein Beispiel einer erfindungsgemäßen Baugruppe mit einem ersten Rohrkörper und einem zweiten Rohrkörper in einem nicht aneinandergefügten Zustand,

Fig. 2

das Beispiel der Figur 1 in einem aneinandergefügten Zustand der beiden Rohrkörper,

Fig. 3

eine Detaildarstellung der Figur 2,

Fig. 4a

die in Figur 3 gezeigte Darstellung in einem Längsschnitt,

Fig. 4b

eine Variante des Beispiels der Figur 4a,

Fig. 5-8

die erfindungsgemäße Baugruppe in verschiedenen Zuständen der Montage aneinander.

It show, each schematically:

Fig. 1

an example of an assembly according to the invention with a first tubular body and a second tubular body in a non-joined state,

Fig. 2

the example of FIG. 1 in a joined state of the two tubular bodies,

Fig. 3

a detailed view of the FIG. 2 .

Fig. 4a

in the FIG. 3 shown representation in a longitudinal section,

Fig. 4b

a variant of the example of FIG. 4a .

Fig. 5-8

the assembly according to the invention in different states of assembly to each other.

The Figures 1 and 2 illustrate an example of an assembly 1 according to the invention. This comprises a first tubular body 2a extending along a first longitudinal direction L1. The first tubular body 2a has on a first end face 3a a first opening 4a for fastening the first tubular body 2a to a second tubular body 2b. The assembly 1 comprises such a, along a second longitudinal direction L2 extending second tubular body 2b. The second tubular body 2b has on a second end face 3b a second opening 4b for fastening the second tubular body 2b to the first tubular body 2a. The first pipe body 2a may be formed as a fastening nozzle 8a of a filter housing 9a of an air filter 10a. The filter housing 9a delimits, as part of an air filter 10a, a housing interior in which a filter element (not shown) for cleaning the air flowing through the tubular bodies 2a, 2b can be arranged. The attachment piece 8a projects outwardly from the filter housing 9a. Alternatively, the first tubular body 2a may also be formed as a pipeline without a filter housing 9a.

The FIG. 4a shows the two tubular body 2a, 2b in a rough schematic representation in each case in a longitudinal section along its longitudinal direction L ₁ , L ₂ . Corresponding FIG. 4a the first face 3a of the first tubular body 2a obliquely arranged in the longitudinal section along the first longitudinal direction L ₁ to the first longitudinal direction _L1. The second face 3b of the second tubular body 2b is arranged in the longitudinal section along the second longitudinal direction L ₂ obliquely relative to the second longitudinal direction _L2. In the in FIG. 4a shown, attached to each other state of the two tubular body 2a, 2b, the two longitudinal directions L ₁ , L ₂ are substantially parallel to each other. The end faces 3a, 3b of the two tubular bodies 2a, 2b extend in the in FIG. 4a illustrated longitudinal section along the longitudinal directions substantially parallel to each other.

Looking now at the representation of FIG. 3 , which is a detail of the FIG. 2 shows in the connection region of the two tubular body 2a, 2b, it can be seen that the second tubular body 2b is formed in the first tubular body 2a inserted. The FIG. 3 shows the second tubular body 2b in a state inserted into the first tubular body 2a. In a variant which is not shown, the second tubular body 2b may be designed to be attachable to the first tubular body 2a.

Of the FIG. 3 If one continues to take that on a peripheral wall 5b of the second tube body 2b in the region of its frontal opening 4b extending in the circumferential direction U, outwardly projecting web 6b is formed. As FIG. 3 can be seen, the web 6b acts as a longitudinal stop for a Einsteckbewegung of the second tube body 2b in the first tube body 2a.

For mechanically stable, yet releasable fastening of the two tubular bodies 2a, 2b to each other as in FIG. 3 represented on the two tubular bodies 2a, 2b, a snap connection 13 may be provided. Alternatively, a latching connection (not shown) is conceivable.

In the following, the attention is again on the representation of the FIG. 4a directed. Accordingly, in the longitudinal section along the first longitudinal direction L ₁ , the first end face ₃ a of the first tubular body ₂ a forms an angle α ₁ between 90 ° and 180 ° with the first longitudinal direction L ₁ . Shown is an angle of about 120 °. Accordingly, the second end face 3b of the second tubular body 2b in the longitudinal section along the second longitudinal direction L ₂ forms an angle α ₂ between 90 ° and 180 ° with the second longitudinal direction L ₂ . Also shown is an angle of about 120 °.

Preferably, the values for the two angles α ₁ and α _{2 are} identical. Alternatively, however, as in the variant of FIG. 4b the value for the angle α _{1 is} also smaller than the value for the angle α ₂ . Then, an overlap area 14 is formed, which increases in the mounting direction. In an embodiment of α ₁ greater than α ₂ , the overlap region 14 decreases in the mounting direction. in the

Corresponding FIG. 4a In the longitudinal section along its first longitudinal direction L ₁ , the first tubular body ₂ a has an upper body wall 11 a whose wall length L _{O1 is} longer than a wall length L _{U1 of} a lower body wall 12 a facing the upper body wall 11 a. The second tubular body 2b has, in the longitudinal section along its second longitudinal direction L ₂ along the second longitudinal direction L _2, an upper body wall 11 b whose wall length L _{O2 is} shorter than a wall length L _{U2 of} a lower body wall 12b facing the upper body wall 11b. As FIG. 4a clearly shows the two wall lengths L _O1, L _U1 of the first tubular body 2 will be with respect to a virtual first reference plane E ₁ measured transverse to the first longitudinal direction _L1. The two wall lengths L _O2 , L _{U2 of} the second tubular body 2b are measured with respect to a virtual second reference plane E ₂ transversely to the second longitudinal direction L ₂ .

In the in FIG. 4a shown, fastened together state of the two tubular body 2a, 2b is the sum S _{o of} the wall length of the upper body wall 11a of the first tubular body and the upper body wall 11b of the second tubular body 2b equal to the sum S _{u of} the wall length of the lower body wall 12a of the first tubular body 2a and the lower body wall 12b of the second pipe body 2b.

In the variant according to FIG. 4b the first tubular body 2a engages in the second tubular body 2b. Due to the unequal selected angle, the upper wall length S _{o is} smaller than the lower wall length S _u .

As the FIGS. 1 to 3 can be seen, in the second tubular body 2b with respect to its second longitudinal direction L ₂ at a distance from its frontal opening 3b a bellows-like trained longitudinal section 7b arranged. The longitudinal portion 7b is formed such that the length of the second tubular body 2b along its second longitudinal direction L ₂ is variable up to a predetermined variation length V ₂ . This facilitates the insertion of the second tubular body 2b in the region of its second end face 3b in the first tubular body 2a in the region of the first end face 3a, since the longitudinal section 7b can first be compressed and then pulled apart again.

The following is the attention to the FIGS. 5 to 8 directed, based on which the assembly of the tubular body 2a, 2b of the assembly 1 is to be explained to each other. In the example scenario of FIGS. 5 to 8 The filter housing 9a of the air filter 10 comprises two first tube bodies 2a designed as attachment sockets 8a. Each of the two attachment stubs 8a is associated with a second tubular body 2b, so that in each case a second tubular body 2b can be attached to each attachment stub 8a.

In the presentation of FIG. 5 are the two designed as a fastening nozzle 8a and projecting from the filter housing 9a outwardly first tubular body at a distance from the two second tubular bodies 2b. The tubular bodies _{2 a} , ₂ b are aligned with one another in such a way that the first longitudinal direction L ₁ extends substantially parallel to the second longitudinal direction L _2. Each of the two first tubular bodies _{2 a} is arranged in the longitudinal direction L ₁ or L ₂ at a distance from the second tubular body ₂ b associated therewith , With respect to a transverse direction Q perpendicular to the longitudinal direction, the two mutually associated tubular bodies 2a, 2b are arranged offset to one another. Subsequently, the two second tubular body 2b in the transverse direction Q on the first tubular body 2a, ie on the two attachment stub 8a, to move until the offset of the tubular body 2a to the them associated first tubular bodies, in the transverse direction Q assumes a zero value. The movement of the two second tubular body 2b in the transverse direction Q is in the FIGS. 6 and 7 illustrated. In FIG. 7 the distance of the second tubular body 2b from the first tubular bodies assigned to it has almost reached zero value. Subsequently, each of the two second tubular bodies ₂ b can be joined to the associated first tubular body _{2 a} or fastening stubs 8 a by assigning the two second tubular bodies ₂ b along the second longitudinal direction L ₂ to the respective first tubular body ₂ a associated therewith. This movement ends with the insertion of the second tubular body 2b into the first tubular body 2a until the existing snap closure locks the tubular body 2a, 2b together.

In a variant not shown in the figures, a guide structure for guiding the respective other tubular body 2b, 2a is formed on a tube wall of the first and / or second tubular body 2a, 2b in the region of the first or second opening 4a, 4b on the inside or outside , This facilitates, in particular, the insertion or attachment of the one tubular body 2a, 2b into or onto the other tubular body 2b, 2a.

In a further variant, the first and / or second tubular body 2a, 2b may have a sealing device (not shown in the figures) for sealing the pipe body interior bounded by the tubular bodies 2a, 2b from the external environment. In this way, it can be ensured that the air flowing through the two pipe bodies 2a, 2b in a state mounted on each other can not escape outward into the outer environment of the pipe bodies 2a, 2b in the connection region of the two pipe bodies 2a, 2b. For this purpose, the sealing device can comprise one or more suitably designed sealing rings, preferably in the form of O-rings made of a resilient material, particularly preferably of an elastomer.

Claims (14)

Assembly (1) for an intake tract of an internal combustion engine, in particular for an air filter of the intake tract, - having a first tube body (2a) extending along a first longitudinal direction (L ₁ ), which has on a first end face (3a) a first opening (4a) for fastening the first tube body (2a) to a second tube body (2b), - having at least one second tubular body (2b) extending along a second longitudinal direction (L ₂ ), which second end (3b) has a second opening (4b) for fastening the second tubular body (2b) to the first tubular body (2a), - wherein the first end (3a) of the first tubular body (2a) in a longitudinal section along the first longitudinal direction (L ₁₎ obliquely to the first longitudinal direction (L ₁₎ and the second face (3b) of the second tubular body (2b) in a longitudinal section along the second longitudinal direction (L ₂₎ obliquely to the second longitudinal direction (L ₂₎ is arranged, - Wherein in an attached state of the two tubular body (2a, 2b), the two longitudinal directions (L ₁ , L ₂ ) are substantially parallel to each other and the end faces (3a, 3b) of the two tubular body (2a, 2b) in the longitudinal section along the longitudinal directions (L ₁ , L ₂ ) are arranged substantially parallel or at an angle, in particular at an acute angle, to one another, - One of the two tubular body (2a, 2b) along the respective longitudinal direction (L ₁ , L ₂ ) reversibly compressible line section (7b). Assembly according to claim 1,
characterized in that
the acute angle is at most 45 °, preferably less than 30 °, particularly preferably between 5 ° and 15 °. Assembly according to claim 1 or 2,
characterized in that
on a peripheral wall (5b) of the second tubular body (2b) in the region of its frontal opening (4b) extending in the circumferential direction (U), outwardly projecting web (6b) is formed, for the in the first tubular body (2a) inserted second tubular body (2b) acts as a stop for the insertion movement along the first longitudinal direction (L ₁ ). An assembly according to any one of claims 1 to 3,
characterized in that - The first tubular body (2a) in the longitudinal section along its first longitudinal direction (L ₁ ) an upper body wall (11 a) whose wall length (L _O1 ) is shorter than a wall length (L _U1 ) of the upper body wall (11 a) opposite lower Body wall (12a), or vice versa, and that - The second tubular body (2b) in the longitudinal section along its second longitudinal direction (L ₂ ) along the second longitudinal direction (L ₂ ) has an upper body wall (11 b) whose wall length (L _O2 ) is longer than a wall length (L _U2 ) one of the upper body wall (11 b) opposite lower body wall (12 b), or vice versa, - wherein the two wall lengths (L _O1 , L _U1 ) of the first tubular body (2a) with respect to a virtual first reference plane (E ₁ ) transversely to the first longitudinal direction (L ₁ ) and the two wall lengths (L _O2 , L _U2 ) of the second tubular body ( 2b) a virtual second reference plane (E ₂ ) transversely to the second longitudinal direction (L ₂ ) are measured. Assembly according to claim 4,
characterized in that
a sum (S _O ) of the wall length (L _O1 ) of the upper body wall (11a) of the first tubular body (2a) and the wall length (L _O2 ) of the upper body wall (11b) in an attached state of the two tubular bodies (2a, 2b) ) of the second tubular body (2b) is equal to the sum (S _U ) of the wall length (L _U1 ) of the lower body wall (12a) of the first tubular body (2a) and the wall length (L _U2 ) of the lower body wall (12b) of the second tubular body (2b ). Assembly according to one of the preceding claims,
characterized in that
in the second tubular body (2b), with respect to its longitudinal direction (L ₂ ) at a distance from the opening (4b), a bellows-like formed longitudinal portion (7b) is provided, such that a length of the second tubular body (2b) along the second longitudinal direction (L ₂ ) is variable up to a predetermined variation length (V ₂ ). Assembly according to one of the preceding claims,
characterized in that - The first end face (3a) of the first tubular body (2a) in the longitudinal section along the first longitudinal direction (L ₁ ) forms an angle (α ₁ ) between 90 ° and 180 ° with the first longitudinal direction (L ₁ ), and / or - The second end face (3b) of the second tubular body (2b) in the longitudinal section along the second longitudinal direction (L ₂ ) forms an angle (α ₂ ) between 90 ° and 180 ° with the second longitudinal direction (L ₂ ). Assembly according to one of the preceding claims,
characterized in that
on the two tubular bodies (2a, 2b) is formed a latching connection or snap connection (13), by means of which the second tubular body (2b) is detachably fixable or fixed to the first tubular body (2a), or vice versa. Assembly according to one of the preceding claims,
characterized in that
on one tube wall of the first and / or second tube body (2a, 2b) in the region of the first or second opening (4a, 4b) inside and outside each a guide structure for guiding the respective other tubular body (2b, 2a) is formed. Assembly according to one of the preceding claims,
characterized in that
the first and / or second tubular body (2a, 2b) has a sealing device for sealing the inner space delimited by the tubular bodies from the outer environment. Assembly according to one of the preceding claims,
characterized in that
the first tubular body (2a) is designed as a fastening neck (8a) of a filter housing (9a), from which it projects outwards. Assembly according to one of the preceding claims,
characterized in that
the filter housing (9a) comprises at least two first tubular bodies (2a) designed as attachment sockets (8a), and a second tubular body (2b) is provided for each fastening sockets (8a), so that at each as fastening sockets (8a) formed first tubular body (2a) in each case a second tubular body (2b) can be fastened or fixed. Air filter (10a) with a filter housing (9a) and at least one assembly (1) according to claim 11 or 12. Method of fastening two tubular bodies (2a, 2b) of the assembly (1) according to one of claims 1 to 12 to each other, comprising the following steps: a) arranging the first tubular body (2a) at a distance from the second tubular body (2b) such that the first longitudinal direction (L ₁ ) is substantially parallel to the second longitudinal direction (L ₂ ), so that the two tubular bodies (2a, 2b) the first longitudinal direction (L ₁ ) are arranged at a distance from each other, and so that they are arranged offset with respect to a transverse direction (Q) perpendicular to the longitudinal direction (L ₁ , L ₂ ), b) moving the first tubular body (2a) or the second tubular body (2b) in the transverse direction (Q) until the offset of the two tubular body (2a, 2b) to each other in the transverse direction (Q) assumes a zero value, wherein at least one of End faces (3a, 3b) is displaceable in the longitudinal direction, c) joining the two tubular bodies (2a, 2b) by moving the first tubular body (2a) along the first longitudinal direction (L ₁ ) towards the second tubular body (2b) or vice versa.

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