DE102016106151A1 - Fastening device for a shielding part for vibration-decoupling fastening of the shielding part to a fastening partner part and shielding part comprising fastening device - Google Patents

Abstract

The invention relates to a fastening device for a shielding part (2) for vibration-decoupling fastening of the shielding part (2) to a fastening partner part (4), the fastening device comprising: - a collar sleeve (5) with a sleeve core (6) and in a radial direction (R) at least two collars (12) extending radially from the sleeve core (6), the collars (8, 9) being at a distance (a) from one another in an axial direction (A), thus forming a gap (10) and - a bridging element ( 11) having a through hole (12) which is penetrated by the sleeve core (6) with a radial play (s), and the bridging element (11) in the axial direction (A) between the collars (8, 9) is arranged, wherein the bridging element (11) is arranged with a radially inner region in the intermediate space (10) and the sleeve core (6) is displaceable radially with respect to the bridging element (11) with a radial clearance (s) i) the bridging element (11) has at least one first support section (20) within the intermediate space (10), which is supported axially on the first collar (8) and has at least one second support section (21) which extends axially on the second collar (9 ) is supported, wherein the first and the second support portion (21) with a connecting portion (22) are connected, which bridges the axial distance (a) between the support portions (20, 21).

Description

The invention relates to a fastening device for a shielding part for vibration-decoupling fastening of the shielding part to a fastening partner part according to the preamble of claim 1 and a shielding part comprising such a fastening device.

From the EP 1 548 246 A2 a vibration damping unit and a shielding part comprising this vibration damping unit with the features of the preamble of claim 1 is known.

The object of the invention is to provide a fastening device for a shielding part for vibration-decoupling fastening of the shielding part to a fastening partner part, which can be produced particularly simply and with few individual parts. In particular, the items should be easy to produce and process reliable with common manufacturing methods.

Furthermore, the fastening device should be modular as a mounting unit preassembled and be connected as such modular assembly unit with the shielding.

• – eine Bundhülse mit einem Hülsenkern und in einer Radialrichtung R zumindest zwei radial vom Hülsenkern abgehenden Bünden, wobei die Bünde in einer Axialrichtung A zueinander einen Abstand a aufweisen, wobei so ein Zwischenraum gebildet ist und
• – ein Überbrückungselement, das ein Durchgangsloch aufweist, das vom Hülsenkern mit einem Radialspiel s durchgriffen ist, und das Überbrückungselement in der Axialrichtung A gesehen zwischen den Bünden angeordnet ist, wobei das Überbrückungselement mit einem radial inneren Bereich im Zwischenraum angeordnet ist und der Hülsenkern radial bezüglich des Überbrückungselements verschieblich ist.

These objects are achieved with a fastening device for a shielding part for vibration-decoupling fastening of the shielding part to a fastening partner part, wherein the fastening device comprises:

• - A collar sleeve with a sleeve core and in a radial direction R at least two radially outgoing from the sleeve core frets, wherein the frets in an axial direction A to each other have a distance a, whereby a gap is formed and
• - A bridging member having a through hole, which is penetrated by the sleeve core with a radial clearance s, and the bridging element is arranged between the collars seen in the axial direction A, wherein the bridging element is arranged with a radially inner region in the intermediate space and the sleeve core radially with respect of the bridging element is displaceable.

Such a fastening device according to the invention is characterized in that the bridging element has within the intermediate space at least a first support portion which is supported axially backlash against the first collar and at least one second support portion which is supported axially backlash adjacent the second collar, wherein the first and the second support portion is connected to a transition portion which bridges an axial distance a between the support portions.

Such a fastening device according to the invention offers on the one hand an axially play-free mounting of the collar sleeve with respect to the bridging element and on the other hand within a radial clearance s a sliding seat of the collar sleeve relative to the bridging element available. Due to the axial play-free supporting the support sections on the collars, a defined guidance of the bridging element is ensured within the collar sleeve in the axial direction. Such a fastening device is also suitable, for example, in a radially outer edge region of the bridging element, which, for. B. extends beyond the collars, to be firmly attached to a hole edge of a receiving hole of a shielding, d. H. fixed in axial and radial directions. It is thus possible to provide a sliding seat in the radial direction R without having to make a relative movement between the fastening device and the shielding part.

In an expedient embodiment of the invention, one of the support sections with respect to a radial direction R is arranged radially further inward than the other support section. Such a configuration makes it possible to provide a cup-like configuration of the bridging element in the region of the intermediate space of the collar sleeve, wherein the through hole is formed in a cup bottom. Such a bridging element can be produced inexpensively in particular as a stamped drawing part.

In another embodiment, the transition portion is formed in cross section by an angle α inclined to the axial direction A running. By an inclination of the transition section by an angle α can be influenced in a simple manner, the axial stiffness of the two support sections to each other. It can be realized with increasing angle α softer in the axial direction A configuration of the support sections to each other.

Furthermore, it may be expedient that the transition section and the sleeve core in the radial direction R define an annular space in which a damping element is arranged, which is a radial displaceability of the collar sleeve with respect to the bridging element to an effective radial clearance s', which is smaller than the radial clearance s , limited. This makes it possible that with a radial displacement of the sleeve relative to the bridging element, the noise is minimized.

In a further embodiment of the invention, the support sections are biased in the axial direction A backlash against the collars. By this measure, a certain frictional force between the sleeve and the bridging element is generated, so that a radial displacement of the sleeve relative to the bridging element requires a certain Mindestradialkraft, which means that in the mounted state of a Abschirmteils less noise takes place when vibrations occur.

For vibration-decoupling attachment of the shielding, it is particularly useful to form the bridging element as a spring, for example, as a stamped or stamped part of a single sheet metal layer. In particular, this also allows a particularly cost-effective production of the bridging element.

For fixing to a shielding part, in particular at a hole edge of a recess or a hole of the shielding part, fixing means are provided radially outside the collars of the sleeve at the bridging element, with which the fastening device is fastened or fastened to the hole edge of the shielding part.

In this case, such fastening means may be integrally connected to the bridging element or integrally formed therefrom. Alternatively, additional fastening means may be provided, with which the bridging element can be fastened to the edge of the hole.

Conveniently, the bridging element seen in a radial direction R between the outer support portion and the fastening means via a flexurally elastic zone within which an axial relative movement of the collar sleeve are resiliently compensated relative to a shielding.

Further advantageous embodiments are specified in further subclaims.

Furthermore, the above-mentioned object is achieved with a shielding part, which has a fastening device according to one of claims 1 to 9.

In the following the invention will be explained in more detail by way of example with reference to the drawing. Show it:

1 a cross section of a first embodiment of the fastening device according to the invention used and attached to a hole edge of a shielding;

2 in cross section a second embodiment of the fastening device according to the invention in a state fixed to the shielding.

A first embodiment of the fastening device according to the invention 1 is in 1 shown in cross section.

The fastening device 1 sits in a shielding part 2 , The shielding part 2 has to accommodate the fastening device 1 a recess 3 , The fastening device 1 serves for fastening the shielding part 2 on a fastening partner part 4 , The attachment partner part 4 can be a hot part such. As an exhaust gas turbocharger, an exhaust manifold or a cooler component such. B. be a body component. The fastening device 1 has a collar sleeve 5 which is rotationally symmetrical about a central axis M in the exemplary embodiment. The collar sleeve 5 has a sleeve core 6 with a Durchstrecköffnung 7 for introducing a fastener, for. B. a screw (not shown) by means of the collar sleeve 5 on the attachment partner part 4 is determinable. Furthermore, the collar sleeve 5 in a radial direction R from the sleeve core 6 outgoing a first bunch 8th and a second fret 9 on. The first fret 8th and the second fret 9 have in a axial direction A a distance a, so seen in an axial direction A between the first collar 8th and the second fret 9 a gap 10 is formed. The sleeve core 6 has a core outer diameter D _K.

Furthermore, the fastening device has 1 a bridging element 11 which is a through hole 12 having. The through hole 12 is from the sleeve core 6 interspersed. An inner diameter D _{I of} the through hole 12 is formed larger than the core outer diameter D _K , so that the collar sleeve 5 with a radial clearance s radially displaceable in the through hole 12 sitting. The radial clearance s results from the difference between the inner diameter D _I and the outer core diameter D _K so that: s = D _I - D _K.

The bridging element 11 points in a radially outer area 13 in a circumferential direction U circumferentially a plurality of tabs 14 on. The tabs 14 are alternately against a first outside 15 and against a second outside 16 of the shielding in the region of a hole edge 17 the recess 3 set and hold the shielding between them 2 , especially the hole edge 17 in the way of a clamping seat. The tabs 14 thus form connecting means for connecting the bridging element 11 with the hole edge 17 of the shielding part 2 ,

Radial within the radially outer area 13 owns the bridging element 11 a transitional section 18 , The transition section 18 connects the radially outer area 13 of bridging element 11 with a radially inner region 19 of the bridging element 11 ,

The radially inner area 19 is located in the axial direction A between the first fret 8th and the second fret 9 , The radially inner area 19 of the bridging element 11 has a first support section 20 extending in the axial direction A on the first fret 8th supported. Furthermore, the bridging element has 11 in the radially inner region 19 a second support section 21 which is axially on the second fret 9 supported. The first support section 20 and the second support section 21 are seen in the axial direction A with a connecting portion 22 connected with each other. The connecting section 22 bridges the axial distance a between the frets 8th . 9 , The axial distance a is preferably a multiple, in particular 3 to 10 times a thickness t of the bridging element 11 ,

The first support section 20 ends preferably radially inwardly seen at the through hole 12 , Thus, the first support portion forms 20 , the connection section 22 and the second support section 21 a substantially cup-like enforcement in the bridging element 11 wherein a bottom of the cup is the through hole 12 and forms the support portion.

In a preferred manner, the support sections 20 and 21 in the axial direction A biased against the frets 8th . 9 set so that the collar sleeve 5 in the radial direction R, overcoming frictional forces between the support sections 20 . 21 and the frets 8th . 9 within the through hole 12 is slidably mounted. The collar sleeve 5 is thus in the axial direction A with respect to the bridging element 11 backlash-free, in particular pretensioned, free of play. In the radial direction R has the collar sleeve 5 via a sliding seat with a maximum displacement s (radial play) from a radial extreme position to the opposite other radial extreme position. In the aforementioned extreme positions, the first support section touches 20 the sleeve core 6 ,

The connecting section 22 runs in the embodiment according to 1 in terms of its axial extent approximately parallel to the axial direction A. This causes a particularly stiff in the axial direction A support of the support sections 20 and 21 to each other. In the circumferential direction U are seen in the embodiment according to 1 the support sections 20 and 21 as well as the connecting section 22 as continuous wall sections, which are formed closed in the circumferential direction U present.

Alternatively, the support sections 20 . 21 or the connecting section 22 individually or in their entirety have openings, so seen for example in the circumferential direction U of the first support portion 20 , formed in the form of a variety of tongues. Likewise, the connecting portion 22 be seen in the circumferential direction U formed by a plurality of separate webs. Such with interrupted wall sections 20 . 21 and 22 trained bridging element 11 is optionally opposite a bridging element 11 with continuously formed in the circumferential direction U walls 20 . 21 . 22 easier to produce. A bridging element 11 with continuous support sections 20 . 21 and / or a continuous connection section 22 may need to be made as a deep-drawn part, whereas unglaced support sections 20 . 21 and / or web-like connecting sections 22 allow the bridging element 11 at least in the radially inner region 19 form as a stamped and bent part.

In a continuous in the circumferential direction U training of the connecting portion 22 is of particular advantage that the connecting portion 22 the gap 10 radially on the outside, so that an annular space 23 is formed. In the annulus 23 may in a preferred embodiment, a damping element 24 be arranged, which is for example annular and with a radial outer side 25 against the connecting section 22 is set. The damping element 24 is thus circumferential around the sleeve core 6 arranged and has an inner diameter D _ID . The diameter D _ID is preferably chosen smaller than the inner diameter D _I and larger than the core outer diameter D _K.

This results in that the shielding 2 together with the bridging element 11 with a reduced relative to the radial clearance s effective radial clearance s'= D _ID - D _K relative to the collar sleeve 5 in the radial direction R is movable.

The damping element 24 may be formed, for example, as a wire tangle, wire mesh, Drahtgewirke, wire mesh or wire mesh, for example, from a steel wire. The damping element 24 is formed with respect to its hardness deformation soft than trained from a solid material sleeve core 6 and the bridging element formed of a solid material 11 , Does it come at the end of the effective radial clearance s' to a contact between the damping element 24 and the sleeve core 6 , This is done without or with reduced noise, since the softer damping element 24 with the sleeve core 6 meets and a hole edge 17 of the bridging element 11 in the radial direction R no longer with the sleeve core 6 can come into contact.

The damping element 24 it sits protected against contamination and / or protected from other external influences in the annulus 23 ,

Alternatively to the above-described arrangement of the damping element 24 it is of course also possible, the damping element 24 with its radially inner boundary surface clearance around the sleeve core 6 around and the effective radial clearance s' between the radial outside 25 of the damping element 24 and the connection section 22 provided.

The damping element 24 is in the above-described embodiments for the fastening device according to the invention 1 an optional ingredient. If no soft damping of the sliding seat between the collar sleeve 5 and the bridging element 11 is desired or necessary, the damping element 24 be omitted without further notice.

In the following, a second embodiment of the fastening device according to the invention 1 based on 2 described. The second embodiment has substantially the same basic construction as that associated with FIG 1 described embodiment of the invention. In that regard, all components having the same function with respect to their reference numerals are also designated the same.

The operation and the above-described structure of the embodiment according to 1 can be readily to the embodiment according to 2 read with the differences listed below.

The embodiment according to 2 differs from the embodiment according to 1 in that the connecting section 22 that the support sections 20 . 21 connects to the central axis M includes a preferred acute angle α. By suitable choice of the angle α, the axial stiffness of the support sections 20 . 21 be influenced to each other. The transition section 22 acts like a diaphragm spring. The angle α can easily be between 0 ° and 90 °. In further embodiments (not shown), the connecting portion 22 be executed crowned and, for example, extend a piece curved radially outward. As a result, in a simple manner, the spring hardness of the bridging element 11 in the axial direction A between the support sections 20 . 21 adjustable.

An optional spherical design of the connecting portion 22 is for example in the 1 and 2 represented by a dashed line. Such a connection section is with 22' characterized.

The support sections 20 . 21 both embodiments can directly, that is directly the frets 8th and 9 touching, interacting with these or with the interposition of sliding discs (not shown) indirectly against the frets 8th and 9 be set.

In all embodiments of the invention, it is particularly advantageous, the bridging element 11 single-layer and one-piece form, for example, as a stamped or stamped drawing part of a single sheet metal layer. The bridging element 11 has a resilient transition section 18 on which is in particular capable of axial forces between the collar sleeve 5 and the shielding part 2 to balance resiliently. This makes it possible, axial vibration forces, for example, on the shielding 2 occur from the attachment point, that is from the attachment device 1 , in particular their sleeve, to decouple.

In the invention is of particular advantage that with a very small number of parts a fastening device 1 for a shielding part 2 can be produced, with which a vibration isolation of the fastening device 1 opposite the shielding part 2 is reachable. Furthermore, in a simple manner, a sliding seat of the collar sleeve 5 opposite the shielding part 2 realizable. Third, all items with simple manufacturing process can be produced. For example, the collar sleeve 5 as in the embodiments according to FIG 1 and 2 represented, consist of two parts of a cross-sectionally L-shaped first part, which is the sleeve core 6 and one of the frets (here: the second fret 9 ). The first fret 8th is designed, for example, as a disc-like body, which is connected to the sleeve core 6 connected, z. B. is caulked. Of course, it is also in the scope of the invention, the collar sleeve 5 in one piece, for example, as a cylindrical sleeve with radially outwardly parked frets 8th . 9 train. Furthermore, it is of course also possible, the sleeve core 6 to train as a single item and the frets 8th . 9 each represent as a disk body. The embodiments of the collar sleeve 5 one or more parts with different production methods is common practice for the person skilled in the art.

In the fastening device according to the invention 1 it is also possible, the fastening device 1 at least consisting of the collar sleeve 5 and the bridging element 11 modular pre-assemble, so that the bridging element 11 from the collar sleeve 5 is held captive. Of course, optionally, the damping element 24 be provided. Such a pre-assembled modular fastening device 1 has in its radially outer area 13 within which the tabs 14 are arranged, a position of the tabs 14 that correspond to a pre-assembly. In this pre-assembly, for example, those tabs 14 in a final mounted position in accordance with 1 and 2 with the first outside 15 to cooperate, aligned in the axial direction A. Here are the tabs 14 in the axial direction A pointing to a diameter which is smaller than the diameter of the recess 3 so that the modularly preassembled fastening device with the axially projecting tabs 14 through the recess 3 is pluggable. In the inserted state, that is if the opposite tabs 14 on the second outside 16 abut the shielding, are the projecting in the axial direction A tabs 14 bent radially outwards, so that they are with the first outside 15 of the shielding part 2 come to the plant.

Such a modular pre-assembly has the particular advantage that the fastening device according to the invention 1 is easy to handle as module module preassembled and as such by means of a simple joint connection in the shielding 2 can be used. At the shielding parts 2 are usually large, sometimes relatively bulky components where it is desirable that a fastening device 1 in a simple manner and without errors mountable. Another advantage of the fastening device according to the invention 1 is that the recess 3 in the shielding part 2 can be kept relatively small in size because of a resilient bridging element 11 is provided, which also within a short radial range between the radially outer region 13 and the radially inner region 19 is able to act effectively decoupling. The bridging element 11 is in particular designed as a closed sheet-metal layer, that is, that the bridging element 11 in particular in the region between the radially inner region 19 and the radially outer region 13 has no breakthroughs. This reliably prevents heat radiation from the shielding part 2 as a whole, including in the field of fastening device 1 is to be shielded, can pass through the recesses unhindered.

Except for the production of the tabs 14 required notches for this is the bridging element 11 in the region radially within the radially outer region 13 and radially outside the radially inner region 19 to keep clear of breakthroughs. Furthermore, it is advantageous that the tabs 14 the bridging element 11 preferably fixed, that is during operation of the shielding 2 immovable relative to the shielding 2 establish. The bridging element 11 is thus neither in the radial direction R nor in the axial direction A nor in the circumferential direction U during operation of the shielding 2 occurring forces with respect to the shielding movably attached. For this purpose, a correspondingly dimensioned clamping seat of the tabs 14 at the edge of the hole 17 the recess 3 of the shielding part 2 provided. This makes it possible that all relative movements, for example, due to thermal expansion or due to occurring force effects between the collar sleeve 5 and the shielding part 2 To balance in operation, between the collar sleeve 5 and the bridging element 11 are compensable. There is no relative movement between the bridging element 11 and the shielding part 2 , causing wear of the shielding 2 , which may be made of aluminum, for example, reduced.

LIST OF REFERENCE NUMBERS

1

 fastening device

2

 shielding

3

 recess

4

 Fixing partner part

5

 collar sleeve

6

 sleeve core

7

 Through opening

8th

 first fret

9

 second fret

10

 gap

11

 bridging element

12

 Through Hole

13

 radially outer area

14

 tabs

15

 first outside

16

 second outside

17

hole edge

18

 Transition section

19

 radially inner area

20

 first support section

21

 second support section

22

 connecting portion

22 '

 Connecting section (crowned)

23

 annulus

24

 damping element

25

 radial outside

A

 axially

a

distance

D _I

 Inner diameter

D _ID

 Inner diameter of the damping element

D _K

 Core outer diameter

M

 central axis

R

radial direction

s

radial clearance

s'

 effective radial play

t

 thickness

U

 circumferentially

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

• EP 1548246 A2 [0002]

Claims (10)

Fixing device for a shielding part ( 2 ) for vibration-decoupling fastening of the shielding part ( 2 ) on a fastening partner part ( 4 ), wherein the fastening device comprises: - a collar sleeve ( 5 ) with a sleeve core ( 6 ) and in a radial direction (R) at least two radially of the sleeve core ( 6 ) outgoing frets (), the frets ( 8th . 9 ) in an axial direction (A) to each other at a distance (a), whereby a gap ( 10 ) and - a bridging element ( 11 ), which is a through hole ( 12 ) from the core of the sleeve ( 6 ) is penetrated by a radial clearance (s), and the bridging element ( 11 ) seen in the axial direction (A) between the frets ( 8th . 9 ), wherein the bridging element ( 11 ) having a radially inner region in the intermediate space ( 10 ) is arranged and the sleeve core ( 6 ) with a radial play (s) radially with respect to the bridging element ( 11 ) is displaceable, characterized in that the bridging element ( 11 ) within the space ( 10 ) at least one first support section ( 20 ) located axially on the first collar ( 8th ) and at least one second support section ( 21 ) axially on the second collar ( 9 ) is supported, wherein the first and the second support section ( 21 ) with a connecting section ( 22 ), the axial distance (a) between the support sections ( 20 . 21 ) bridged. Fastening device according to claim 1 or 2, characterized in that one of the support sections ( 20 . 21 ) is arranged radially further inboard than the other support section (FIG. 20 . 21 ). Fastening device according to claim 1, characterized in that the connecting portion ( 22 ) in cross section by an angle (α) inclined to the axial direction (A). Fastening device according to one of the preceding claims, characterized in that the connecting portion ( 22 ) and the sleeve core ( 6 ) in the radial direction (R) an annular space ( 23 ), in which a damping element ( 24 ) is arranged, and is dimensioned such that there is a radial displaceability of the sleeve core ( 6 ) with respect to the bridging element ( 11 ) is limited to an effective radial clearance (s') which is less than the radial clearance (s). Fastening claim according to one of the preceding claims, characterized in that the support sections ( 20 21 ) in the axial direction (A) backlash-free or pretensioned free of play at the collars ( 8th . 9 ). Fastening device according to one of the preceding claims, characterized in that the bridging element ( 11 ) as a spring position, z. B. is formed as a stamped bent part or as a punched drawing part of a single layer. Fastening device according to one of the preceding claims, characterized in that the bridging element ( 11 ) in a radially outer region fastening means, with which the fastening device at a hole edge ( 17 ) of the shielding part ( 2 ) is fastened or fastened. Fastening device according to one of the preceding claims, characterized in that the bridging element ( 11 ) in a radial direction (R) seen between the outer support portions () and the fastening means () has a flexurally elastic zone (), with the axial relative movements of the collar sleeve ( 5 ) relative to the shielding part ( 2 ) are resilient compensated. Fastening device according to one of the preceding claims, characterized in that the support sections ( 20 . 21 ) indirectly at the corresponding frets ( 8th . 9 ), wherein between the support sections ( 20 . 21 ) and the corresponding frets ( 8th . 9 ) Sliding disks are arranged. Shielding part, in particular heat shield, having a fastening device according to one of claims 1 to 9.

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