WO2015007866A2

WO2015007866A2 - Coupling having a flexible element

Info

Publication number: WO2015007866A2
Application number: PCT/EP2014/065437
Authority: WO
Inventors: Haymo Bregler
Original assignee: Voith Patent Gmbh
Priority date: 2013-07-17
Filing date: 2014-07-17
Publication date: 2015-01-22
Also published as: CN205823977U; WO2015007866A3; DE102013011900B4; DE102013011900A1

Abstract

The invention relates to a metal bellows coupling comprising a primary attachment element having a first attachment plane; a secondary attachment element having a second attachment plane; a metal bellows, which is disposed in the flux of force between the primary attachment element and the secondary attachment element, wherein the metal bellows has a first axial extent, wherein the primary attachment element has a second axial extent between the connection plane thereof to the metal bellows and the first attachment plane, and wherein the secondary attachment element has a third axial extent between the connection plane thereof to the metal bellows and the second attachment plane. The invention is characterised in that at least one of the attachment elements is disposed radially inside or outside the metal bellows, such that the axially overall length between the attachment planes of the primary attachment element and of the secondary attachment element is smaller than the sum of the three axial extents.

Description

Coupling with flexible element

The invention relates to a coupling with a flexible element according to the closer defined in the preamble of claim 1. The invention further relates to a conveyor system, in particular a longwall conveyor, with such a coupling.

A coupling with a flexible element according to the invention can

For example, be a metal bellows coupling or a diaphragm coupling with two parallel membranes, which are interconnected via a rigid ring member. The metal bellows coupling can be single-stage with a single metal bellows or multi-stage with two or more arranged in series or parallel metal bellows. Such couplings are

in particular from drive trains in industrial engineering, for example for driving conveyor systems, known per se from the prior art. Such couplings typically consist of at least one metal bellows or two connected diaphragms as a flexible element having a first axial extension and a primary connection element and a secondary connection element, which are arranged axially downstream of the flexible element in the power direction. These have a second and a third axial extent, so that in total by the sum of the three axial extensions a total length or axial

Length of the coupling results. In the connection elements various connection elements are conceivable and known, for example, a classic flange mounting for screwing a mating flange or a one-piece or split clamping hub. Furthermore, cone clamping hubs,

Expansion hubs, connectors, gears or the like as

Connection elements known in such couplings.

The problem with such couplings is in particular that they have a comparatively large axial length and therefore in one

Powertrain, which, for example, previously with a conventional clutch or an elastic coupling was equipped, can not be easily retrofitted. Couplings with a flexible element have to be constructed from the beginning integrated in the structure of the respective drive train. On the other hand, couplings having a flexible element offer corresponding advantages because they have an axial, lateral and, to a limited extent, even angular displacement of the primary connecting element relative to the secondary one

Allow connection element. As a result, for example, the bearings of connected to the clutches shafts, for example a

hydrodynamic coupling, a gearbox, an electric machine or the like, relieved and can not therefore by too high

Restoring forces in the area of their bearings come to harm.

The object of the present invention is now to provide a coupling with a flexible element according to the preamble of claim 1 or a conveyor system according to the preamble of claim 9, which is advantageously developed, and which avoids in particular the disadvantages mentioned above. According to the invention this object is achieved by a coupling with a flexible element having the features in the characterizing part of claim 1. In addition, a conveyor system with such a coupling solves the problem. Advantageous embodiments and further developments of the coupling with flexible element and the conveyor system resulting from the dependent therefrom dependent claims.

In the case of the flexible element coupling according to the invention, it is comparable to that provided for in the prior art that between a primary element

Connection element and a secondary connection element, a flexible element is arranged to force or torque from the primary

Connection element on the secondary connection element in particular

exclusively via torsional forces. According to the invention, it is in that at least one of the connection elements is arranged radially inside or outside the flexible element, in such a way that the axial length between a first connection plane of the primary connection element and a second connection plane of the secondary connection element is smaller than the sum of the amount of the first axial extent and two other axial extensions. The axial extent of the connection elements are determined between the connection levels of the flexible element with the connection elements on the one hand and the connection levels on the other. The axial extent of the flexible element is the maximum axial

Expansion. The connection levels of the connecting elements define in the embodiment of the connecting elements as flanges the plane at which

For example, a shaft is screwed with its flange. At a

Clamping flange or a similar structure, this may for example be a plane in the center of gravity of the connection or the connection. At least when the clutch is unloaded, this plane is always perpendicular to the axial direction. The connection levels in the sense of the invention are those

Layers in which the flexible element is connected to the respective connection element, typically along a circumferential circle. These are also at least at unloaded coupling perpendicular to the axial direction, ie on the axis of rotation of the clutch. In the case of a connection and / or a connection over several levels or obliquely to a plane occurs in place of the plane in the context of the invention turn a plane in the center of gravity of the connection or the connection. A flexible element in the sense of the invention may be, for example, a metal bellows. Also, a plurality of metal bellows arranged in series or parallel to one another may constitute a flexible element in the sense of the invention. Likewise, flexible element according to the invention may be a structure which consists of at least two metal membranes, which are axially spaced from each other. These can be, for example, a rigid, typically tubular Element or in turn be interconnected by a metal bellows. Also, such a structure falls under the term flexible element in the context of the invention.

In the structure according to the invention, these two connection levels, which overall define the axial length of the flexible element coupling with regard to its connections, are smaller than the sum of the three axial extensions. This is achieved in the structure according to the invention in that at least one of the connection elements is arranged radially inside or outside of the flexible element. At least one of the connecting elements thus projects either at least partially through the flexible element or surrounds this. Depending on the length of this protruding or the flexible element encompassing part, which may be formed, for example, tubular inside or outside of the flexible element, and the respective end of the flexible element with the region of the connecting element, which has the connecting plane connects, so arises a structure, which has a much shorter length in the axial direction than a conventional flexible element coupling. If the at least one connecting element, which extends radially inwardly or outwardly of the flexible element, has a length which is greater than the axial length of the flexible element, then even an axial length can be realized for the flexible element coupling as a whole Is "negative", in which the connection level of the secondary connection element so with respect to the primary

Connection element lies in the axial direction in front of the terminal level of the primary connection element. Of course, this then requires the connection to a hollow shaft at least at one of the connection elements, so that the other connection element can protrude into or through the corresponding cavity.

In a very favorable embodiment of the flexible element coupling according to the invention, it may be provided that at least one of the

Connecting elements in the axial direction radially inside or outside the axial Extension of the flexible element is arranged. Such an arrangement of the connection element, in particular if it is radially within the axial extent of the flexible element, moreover has the decisive advantage that the flexible element can be supported by the corresponding connection element if it breaks due to overloading. Unlike the couplings in the prior art so that occurring

Damage limited because of the support function of at least one

Connection element of the drive train largely remains in the intended position.

In the conveyor system according to the invention, it should in particular be a longwall conveyor, particularly preferably a longwall chain conveyor, the drive by an electric drive motor and a transmission in

Power flow direction between the electric drive motor and a drive means of the conveyor system provided. According to the invention, it is now also the case that, in the power flow direction after the electric drive motor, at least one coupling with a flexible element is provided in one of the configurations according to the invention. This construction is particularly simple and efficient, since a conventional coupling, for example an elastic coupling, can be replaced here by the coupling with a flexible element that is very short in the axial direction. As a result, the advantages of the coupling with a flexible element with regard to the displaceability can be retrofitted by retrofitting the system with such a coupling according to the invention. This applies in particular to systems which are exposed to a correspondingly high load, for example long chain conveyors, which are used underground for the transport of mined coal and / or ores.

In a further very advantageous embodiment of the invention

Conveying system, it is now also provided that a hydrodynamic component, in particular a hydrodynamic coupling, between the electric drive motor and the coupling with a flexible element or is provided between the flexible element coupling and the transmission. In particular, the connection of the drive motor or the transmission to a hydrodynamic component, in particular a hydrodynamic coupling or turbo coupling via the coupling with flexible element is of decisive advantage for the structure, since it supports the storage within the hydrodynamic coupling by the corresponding advantages of the coupling with a flexible element in terms of displacement, while torsional vibration damping properties already due to the

Hydrodynamics of the turbo coupling are given. Therefore, an otherwise built-elastic coupling with its disadvantages with respect to the transmission of torque and the vulnerability of their elastic elements can be completely eliminated.

The coupling with flexible element can be used in particular on the side of the hydrodynamic component, on which the

rotatable parts of the hydrodynamic component or its main shaft is mounted, as this can be done to relieve the bearing. If both sides are provided with corresponding bearings, it is also conceivable to arrange the coupling with the flexible element in the power flow direction both before and after the hydrodynamic component, ie obstructing two such couplings with a flexible element.

Further advantageous embodiments of the coupling according to the invention and the conveyor system will become apparent from the remaining dependent claims and will be apparent from the embodiments, which are described below with reference to the figures.

Showing:

Figure 1 is a principle indicated conveyor system; a metal bellows coupling in a conventional embodiment according to the prior art:

FIG. 3 shows a first possible embodiment of a device according to the invention

Clutch;

Figure 4 shows a variant of the first possible embodiment of

coupling according to the invention;

Figure 5 shows a further variant of the first possible embodiment of the coupling according to the invention;

Figure 6 shows a second and third possible embodiment of a

Metal bellows coupling according to the invention;

Figure 7 shows a fourth possible embodiment of an inventive

Metal Bellows;

Figure 8 shows a fifth possible embodiment of an inventive

Metal Bellows;

Figure 9 shows a sixth possible embodiment of an inventive

Metal Bellows; a seventh possible embodiment of a metal bellows coupling according to the invention; an eighth possible embodiment of a metal bellows coupling according to the invention; FIG. 12 shows a ninth possible embodiment of a diaphragm coupling according to the invention; and

FIG. 13 shows a tenth possible embodiment of a device according to the invention

diaphragm coupling

In the illustration of FIG. 1, a conveyor system 1 is shown purely by way of example and in a very highly schematic manner. It should be a so-called

Strebförderer act in which transverse to the conveyed and the conveying direction extending struts 2 are driven indirectly via a drive means 3. In the embodiment shown here, the struts 2 are to be driven by the drive means 3, in particular via two chains 4 with which they are firmly connected. The structure is then accordingly as

Strebkettenförderer or Kettenstrebförderer called. However, the conveyor system could also be a conveyor system with a conveyor belt or the like.

The conveyor 1 comprises for driving the drive means 3 a

electric drive motor 5, which via a hydrodynamic coupling 6 and a later described in more detail clutch 7 with flexible element 70 and a transmission 8, the drive means 3 drives. The structure is so far known from the prior art, the peculiarity is now in the clutch 7. Alternatively or in addition to the coupling 7 between the hydrodynamic

Coupling 6 and the transmission 8 could just as well be arranged a further coupling 7 with flexible element 70 in the direction of the power flow between the electric drive motor 5 and the hydrodynamic coupling 6. To simplify the presentation, this optional clutch has been dispensed with. It is clear to the person skilled in the art that only this optional coupling, which is not shown in Figure 1, may be present. On the illustrated clutch 7 could then be optionally waived.

In the illustration of Figure 2 is a conventional metal bellows coupling 71 as an example of a coupling 7 with flexible element 70 in one

Embodiment to recognize in the prior art. In this case, only the upper half rotating about an axis of rotation 9 is shown schematically. It comprises a primary connection element 10, which is designed here for example as a screw with corresponding holes 1 1 for the screws. This results in a connection level of the primary connection element

10, which is referred to in the illustration of Figure 2 with egg, and which - without displacement forces acting on the metal bellows coupling 71 - is perpendicular to the axis of rotation 9. The primary connection element 10 is connected to a secondary connection element 13 via a metal bellows 12 as a flexible element 70, which is formed in a manner known per se. The secondary

Connecting element 13 is also formed in the embodiment shown here with a flange for a screw connection and has corresponding holes 14. A connection plane E _{2 of} the secondary connection element 13 is likewise drawn in and is perpendicular to the axis of rotation 9 on the side of the flange of the secondary connection element 13, which faces away from the primary connection element 10. The construction of the metal bellows coupling 71 has an overall length of x _a between the first connection plane Ei and the second connection plane E ₂ . Between the primary connection element 10 and the secondary connection element 13, the metal bellows 12 extends. This is connected in each case to a connection plane E ₃ , E ₄ with the primary or the secondary connection element 10, 13. The metal bellows 12 has a maximum extension of Xi. The two connection elements 10, 13 each have from the connection plane E ₃ , E ₄ with the metal bellows 12 to its connection level Ε-ι, E ₂ an axial extent of X2 and X3. 2, as well as in the following figures, the primary side, that is to say the side connected to the drive, shown on the other side, as in the illustration of Figure 1. However, this is irrelevant to the explanation of the structure of the metal bellows coupling 71, since in all the figures, the primary side and the secondary side could also be replaced respectively.

Instead of a conventional known from the prior art

Metal bellows coupling 71, the clutch 7, which is used in the conveyor system 1, now look in particular as described schematically and exemplarily with reference to the embodiments illustrated below.

In the illustration of Figure 3, such a coupling 7 with flexible element 70 in an embodiment according to the invention as a metal bellows coupling 71 again in detail, shown in its lying above the rotation axis designated 9 half. The secondary connection element 13 now also comprises between its flange and the connection of the secondary

Connecting element 13 on the metal bellows 12 as a flexible member 70, a hollow-shaft-like portion 15 which projects into the interior of the metal bellows 12. Now, it is so that the metal bellows 12 has an extension in the axial direction of the rotation axis 9, which is denoted by xi. Due to the fact that the secondary connection element 13 extends into the interior of the metal bellows 12, this results in a total axial length x _a between the connection plane Ei and the connection plane E ₂ , which is significantly smaller than the sum of the axial

Extents Xi + x ₂ + X3. The total length x _a is thus shortened compared to the known and customary in the prior art structure.

A variant of the metal bellows coupling 71 according to FIG. 3 is shown in the representation of FIG. On the other hand, in the illustration of Figure 3 is the

hollow shaft-like portion 15 formed in the embodiment variant shown in Figure 4 is much shorter than in the structure shown in Figure 3. Nevertheless, here also results between the two connection levels Ei and E ₂ a total axial length x _a , which is shortened compared to the structures of the prior art accordingly. In addition, it can be seen in the representation of FIG. 4 that both connection elements 10, 13 have regard to FIG

Outer diameter are arranged within the smallest diameter of the metal bellows 12, wherein the primary connection element 10, the corresponding holes 1 1 of the exemplary illustrated as a screw flange primary

Connecting element 10 has a smaller diameter than the corresponding holes 14 of the secondary connection element 13. This structure is in contrast to the example shown in Figure 3 with reversed diameters of the connection elements 10, 13 and their holes 1 1, 14 also conceivable and could of course also on the

Embodiment according to Figure 3 and be transferred to all subsequent embodiments accordingly. A further alternative to the metal bellows coupling 71 shown in FIG. 3 can be seen in the representation of FIG. The only difference is that the metal bellows 12, which here also represents the flexible element 70, is shortened by one half-wave, so that the connection point with the primary connection element 10 migrates to a further outward radius.

In the representation of Figure 6, a similar construction of the metal bellows coupling 71 can be seen, as he has already been explained in detail in the illustration of Figure 3. The only difference is that the extent x _{3 of} the secondary connection element 13 or the extension of its tubular portion 15 in the axial direction relative to the previously

described structure has become larger, so that the flange of the secondary terminal member 13 is located radially and axially within the primary terminal member 10. In a dashed variant, the possibility is also shown to allow the flange of the secondary connection element 13 to protrude beyond the connection plane Ei through the primary connection element 10, so that a "negative" overall length x _a results, at which the connection plane E ₂ the metal bellows coupling 71 facing away from the terminal level egg comes to rest.

In the representation of Figure 7, a further embodiment is shown, which also allows a very short length x _{a of} the metal bellows coupling 71. Both the primary connection element 10 and the secondary connection element 13 now have a tubular section 15

or 16, which in each case projects into the interior of the metal bellows 12 and thus allows a very short structural length x _a between the connection planes Ei and E ₂ .

The structure described hitherto in FIGS. 3 to 7 is of course not only possible in such a way that at least the secondary connecting element 13 is arranged inside the metal bellows 12, but of course it would also be possible for the latter to hold the metal bellows 12 and optionally the primary connection element 10 engages radially on the outside. This is obvious to the person skilled in the art, so that a more detailed description of these variants has been dispensed with. A variant embodiment can now be seen in the illustration of Figure 8, which in turn allows a "negative" axial length x _{a of} the metal bellows coupling 71, comparable to the dashed embodiment of Figure 5. For this purpose, the primary connection element 10 surrounds the metal bellows 12 from the outside, is arranged accordingly within the metal bellows 12 while the secondary connecting element 13. 15 and 16 By a suitable adjustment of the length of the tubular portions so a nearly arbitrarily long or short length x _a in the axial direction of the metal bellows 71 is possible. the overall axial length x _a is always smaller than the extension xi of the metal bellows 12 and can be arbitrarily small or even "negative" in the sense described above. In the illustration of Figure 8 is purely an example to recognize slightly "negative" axial length x _a , which is accordingly provided in Figure 6 with the addition <0.

In the illustration of FIG. 9, a metal bellows coupling 71 can again be seen substantially analogously to the illustration in FIG. The flexible element 70 is formed here not only from a metal bellows 12, as shown in Figure 7, but from two parallel metal bellows 12, 17, which are both connected to both the primary connection element 10 and with the secondary connection element 13. The two metal bellows 12, 17, which form the flexible element 70, are thus arranged "parallel" to each other and connected in terms of their power flow.

The maximum axial extent xi of the flexible element 70 is determined by the axial length of the larger metal bellows 12. The axial extensions x ₂ and x ₃ between the connection levels Ε-ι, E ₂ and the connection levels E ₃ , E ₄ are exemplified for the larger of the two metal bellows 12, they can just as well for the smaller of the metal bellows 17 counted

or used. Another alternative embodiment of the coupling 7 with the flexible

Element 70 can be seen in the illustration of FIG. Again, a first metal bellows 12 and a second metal bellows 17, analogous to the representation in Figure 9, indicated. Unlike in the illustration of FIG. 9, the two metal bellows 12, 17 are arranged parallel to one another, whereby the longer metal bellows 12 determines the axial extent xi of the flexible element 70. With regard to the power flow, however, they are connected in series with one another. This is achieved in that the flexible element 70 is formed from the two metal bellows 12, 17 and a rigid connecting ring 18 between these metal bellows. In place of the rigid ring 18 can also, as can be seen in the illustration of Figure 11, a direct connection between the two

Metal bellows 17, 12 occur, which can then be formed, for example, welded together.

For all embodiments with the metal bellows 12 or 12 and 17, the principle shown in the illustration of Figure 5, namely that the connections can be made both in the region of a downward and in the region of an upwardly extending shaft, so that for the Professional give the corresponding variants. The number of individual bulges of the metal bellows 12, 17 can be arbitrary, so that in an extreme case only a single bulge and thus an im

Cross section of the upper half, as shown in the figures, U-shaped metal bellows is formed. Of course, the same applies to the embodiments of Figures 9, 10 and 1 1 as for the embodiments of Figures 3 to 7, namely that the arrangement both inside and outside of the

Metal bellows 12, 17 can be made as a flexible element 70.

In the illustration of Figure 12 is now another embodiment of

Detect coupling 7 with the flexible member 70. This differs fundamentally from the previous embodiments, in which the flexible element 70 was always formed by one or more metal bellows 12, 17. The flexible element 70 is in the case of this as a diaphragm coupling 72nd

trained coupling 7 of two perpendicular to the axis of rotation 9 arranged flexible metal membranes 19, 20 is formed. The metal membranes 18, 19 are shown with parallel surfaces, they can just as easily be slightly conical and would then typically taper correspondingly from radially inward to radially outward in the cross section shown here. The first metal diaphragm 19 is connected to the primary connection element 10, the second metal diaphragm 20 to the secondary connection element 13. The two metal membranes 19, 20 are in turn, in the illustrated here Embodiment radially outside their connection to the

Connection elements 10, 13 with a connecting tube 21 with each other

connected. The construction could just as easily be reversed radially, that is to say in such a way that the two metal membranes 19, 20 protrude radially inward from the connection elements 10, 12 and are correspondingly connected there to the connection pipe 21. In this construction, the extension xi of the flexible element 70 now extends, in the case of the combination of the metal membranes 19, 20 and the connecting tube 21, between a first connection plane E ₃ between the primary connection element 10 and the first membrane 19 and a connection plane E ₄ Due to the perpendicular to the axis of rotation 9 standing membranes 19, 20 corresponds to the central surface of the respective metal membrane 19, 20 of this respective terminal level E ₃ , E ₄ , so that the first extension xi substantially by the axial length of the connecting tube 21 is shown. Otherwise, the structure is designed so that in this case the secondary connection element 13 is arranged in the axial direction within the circumference of the flexible member 70 and thereby a very small overall length x _{a of} the diaphragm coupling 72 is possible. Instead of the two metal membranes 19, 20 and the connecting pipe 21 is of course a structure with a plurality of metal membranes 19, 20, 22, 23 conceivable, which then via a plurality of connecting pipes 21 .1, 21.2, 21.3

connected to each other. Such a construction is indicated in the illustration of FIG. 13 substantially analogously to the illustration in FIG.

The connecting tube 21 does not have to be designed to be rigid, as indicated in the illustration of FIG. 12, but may in turn also be flexible or, for example, may also be realized in the form of a metal bellows. All parts of the flexible element 70, regardless of whether this consists of metal bellows 12, 17 with possible connecting elements 18 or metal membranes 19, 20 with a connecting tube 21, can be formed both in several pieces as well as in one piece. The construction guarantees in each case the

desired flexibility with very small overall length x _a .

Of course, all structures can be realized so that the primary side can be reversed with the secondary side and it can of course be chosen a different connection variant than the variant shown here with the flanges with screw. All of these are familiar and familiar to those skilled in the art, so that alternative options such as clamping flanges, expansion hubs, cone clamps and the like will not be discussed in more detail.

Claims

claims

1 . Coupling (7, 71, 72) with a flexible element (70), with,

1 .1 a primary connection element (10) having a first connection level

1 .2 a secondary connection element (13) with a second

Connection level (E ₂ );

1 .3 a flexible element (70), which in the power flow between the

primary terminal (10) and the secondary terminal (13) is arranged, wherein

1 .4 the flexible element (70) has a first axial extent (xi), wherein

1 .5 the primary connection element (10) has a second axial extension (x ₂ ) between its connection plane (E ₃ ) with the flexible element (70) and the first connection plane (Ei), and wherein

1 .6 the secondary connection element (13) has a third axial extension (x ₃ ) between its connection plane (E ₄ ) with the flexible element (70) and the second connection plane (E ₂ ),

characterized in that

1 .7 at least one of the connection elements (10, 13) is arranged radially inside or outside of the flexible element (70), so that

1 .8 the axial length (x _a ) between the connection levels (Ε-ι, E ₂ ) of the

primary connection element (10) and the secondary connection element (13) is smaller than the sum of the three axial extensions (χ-ι, x ₂ , x ₃ ).

Second clutch (7, 71, 72) according to claim 1, characterized in that at least one of the connecting elements (10, 13) in the axial direction radially inside or radially outside the axial extent (xi) of the flexible element (70) is arranged.

3. clutch (7, 71, 72) according to claim 1 or 2, characterized in that one of the connecting elements (10, 13) in the axial direction next to the flexible element (70) is arranged, and that the other connection element (13, 10) in the axial direction radially inside or radially outside the axial extension (xi) of the flexible element (70) is arranged.

4. clutch (7, 71, 72) according to claim 1 or 2, characterized in that both connection elements (10, 13) in the axial direction radially inside or radially outside the axial extent (xi) of the flexible element (70) are arranged.

5. clutch (7, 71, 72) according to claim 1 or 2, characterized in that one of the connecting elements (10, 13) in the axial direction radially inside and the other of the connecting elements (13, 10) in the axial direction radially outside the axial Extension (xi) of the metal bellows (12) are arranged.

6. clutch (7, 71, 72) according to claim 1 or 2, characterized in that both connection elements (10, 13) in the same axial direction next to the flexible element (70) are arranged.

7. clutch (7, 71, 72) according to one of claims 1 to 6, characterized

characterized in that the flexible element (70) is formed as a metal bellows (12).

8. clutch (7, 71, 72) according to one of claims 1 to 6, characterized

characterized in that the flexible element (70) consists of several in the power flow in series or parallel metal bellows (12, 17) and

optionally formed at least one rigid connecting element (18) between the metal bellows (12, 17).

9. clutch (7, 71, 72) according to one of claims 1 to 6, characterized in that the flexible element (70) of at least two parallel perpendicular to the axis of rotation (9) arranged metal membranes (19, 20, 22, 23) and at least one connecting pipe (21, 21 .1, 21 .2, 21 .3) between the metal membranes (19, 20, 22, 23) is formed.

10. clutch (7, 71, 72) according to one of claims 1 to 9, characterized

in that at least one of the connection elements (10, 13) has a flange with bores (1 1, 14) for screws.

1 1. Coupling (7, 71, 72) according to one of claims 1 to 10, characterized

characterized in that at least one of the connection elements (10, 13) has a clamping hub or expansion hub.

12. conveyor system, in particular longwall conveyor, with

12.1 an electric drive motor (5); and

12.2 at least one transmission element (8) in the direction of the power flow after the electric drive motor (5);

characterized in that

12.3 in power flow direction after the electric drive motor (5)

In addition, at least one coupling (7) with a flexible element (70) according to one of claims 1 to 1 1 is provided.

13. Conveying system according to claim 12, characterized in that a

hydrodynamic component, in particular a hydrodynamic coupling (6), between the electric drive motor (5) and the coupling (7) is provided with a flexible element (70).