gear coupling

Abstract

A toothed coupling (30, 50, 60; 80) with two interconnected toothed coupling halves (27, 28), each of the toothed coupling halves (27, 28) having at least one external toothed part (3, 4; 70, 72) and one internal toothed part (5, 6; 71, 73) which form a crowned drive connection (13, 14) in the respective toothed coupling half (27, 28), wherein at least one elastic sealing element (18, 47) is associated with the drive connection (13, 14), characterized in that at least in a region (56) in which the toothed coupling halves (27, 28) are in contact, and / or in at least a region (81) of the internal toothed part (5, 6; 71, 73) and / or of the external toothed part (3, 4; 70, 72) at least one damping elastic element (35, 41) is arranged between the two coupling halves (27, 28) of at least one tooth coupling half (27; 28), wherein the elastic element (35) has at least two metallic side elements (33, 34; 53, 54;21, 22) are assigned to the support, wherein the elastic element (35) is vulcanized between the two side elements (33, 34; 53, 54; 21, 22), forming an elastic composite element (29) as a whole.;

Description

The invention relates to a toothed coupling having two connected toothed coupling halves, each of the toothed coupling halves having at least one external toothing part and one internal toothing part, which form a curved entrainment connection in the respective toothed coupling half, wherein at least one elastic sealing element is assigned to the entrainment connection.As the desire for an ever more compact design of drive systems and a simultaneous increase in power density continues to increase, tooth couplings are becoming increasingly important. They are capable of compensating comparatively large angular displacements and axial and radial displacements in the case of positive transmission of torque and rotational movement. Ever-increasing power requirements of propulsion systems, such as wind turbines, rolling mill drives and train drives (road and S-train, high speed trains), require tooth couplings as a machine element with the highest power density.The publication DE 196 44 884 C1 describes a toothed coupling 1 with two toothed coupling halves 27, 28, in which the two toothed coupling halves 27, 28 are firmly screwed to one another directly by means of fitting screws 23. FIG. 1 shows a twin-tooth clutch 1 screwed in this way, in which the two tooth clutch halves 27, 28 essentially each have a clutch housing 2 with two clutch housing parts 5, 6 as two sleeves and two clutch parts 3, 4 arranged within the clutch housing 2 as hubs, wherein the clutch parts 3, 4 each define an inner region 17, 65 of the clutch part in the interior of the clutch housing 2, between which region a flange region 56 is present.The coupling housing 2 expediently consists of the coupling housing parts 5, 6 which are designed to be largely symmetrical and are screwed together by means of the fitting screws 23 on the mutually facing flanges 42, 43 present on the coupling housing parts 5, 6 and each contain a radially directed inner cover 45, 46 sealing off the inner regions 17, 65 of the coupling part.The coupling parts 3, 4 have external teeth 9, 10 with arched coupling teeth on their outer circumferential region 7. The clutch housing 2 has internal teeth 11, 12 on its inner circumference 8. The external teeth 9, 10 of the coupling parts 3, 4 and the internal teeth 11, 12 of the coupling housing 2 form in the coupling housing parts 5, 6 in each case a curved entrainment tooth 13, 14 which is sealed and protected by an elastic sealing element 18, 47 and in which, in accordance with a relative movement between the coupling parts 3, 4 and the coupling housing parts 5, 6 with respect to one another, the internal teeth 11, 12 and the external teeth 9, 10 can also be moved relative to one another. The relative movement arises as a result of axial and / or angular deflections of the coupling parts 3, 4 with respect to the coupling housing parts 5, 6.On the inner sides 19, 20 between the clutch housing 2 and the clutch part 3, 4 there is provided in each case an annular disk-shaped cover 45, 46 which protects the driving tooth arrangements 13, 14 and the associated clutch part inner regions 17, 65. The clutch housing axle is indicated by the reference numeral 59.Between the coupling housing 2 or the coupling housing parts 5, 6 and each coupling part 3, 4 an axially directed corrugated pipe 18, 47 fastened to the two coupling parts 3 and 5 and coupling housing parts 4 and 6 can be arranged as an elastic sealing element, which both seals the associated arched driving toothing 13, 14 and also resiliently adjusts a predetermined position of the coupling housing 2.Instead of the corrugated tubes 18, 47, other elastic sealing elements can also be introduced for sealing the entrainment connection 13, 14.The deflection of the coupling parts 3, 4 (hubs) with respect to one another, as shown in FIG. 2, results in a relative movement with respect to the coupling housing parts (sleeves) 5, 6, which is shown by a deflection / displacement angle δ between the coupling part axes of rotation 15, 16 and the coupling housing axis of rotation 59.In addition, axial and radial displacement compensation is possible. The rigidity is due to the use of metallic material. Damping properties in the conventional toothed couplings are virtually absent.In general, tooth couplings are largely made of metallic materials. Because of the material, these therefore have a high torsional rigidity and a very low damping capacity between the toothed coupling half facing the drive and the toothed coupling half facing the drive output.The high stiffnesses and low damping properties can have a negative effect on the vibration behavior of the overall transmission in certain drive configurations. In particularly sensitive drives, there is a requirement for adaptation of the rigidity for the targeted adaptation of the natural frequencies of the drive, wherein the original installation space of the clutch within the drive system must remain, i.e. a high power density is demanded in many cases. The use of purely elastic couplings, for example wedge pack couplings or link couplings, is not possible, since the elastic coupling plane has a significantly lower power density due to the material used and the required displacement capability and must therefore be designed larger in order to transmit the required torque and to compensate for the displacements occurring.A disadvantage is also that the toothed couplings do not have electrically insulating properties between the toothed coupling halves of the drive and of the drive. Thus, in a further development of the entire clutch technology, there is a requirement many times for an electrical insulation effect of clutches.The publication WO 2013 / 041 082 A1 describes an elastic, one-piece wedge pack ring. The wedge packet ring 40 shown in FIG. 3 comprises at least several metal fastening elements 21 and 22 which are arranged in a ring-encircling manner and are shaped in a wedge-shaped manner and which are arranged in a ring-encircling manner and each have a continuous bore 24, 25 which is directed radially to the ring axis, wherein the continuous bores 24, 25 are provided for at least one radially directed screw connection which can be carried out and is directed from the ring outer region 37 to the ring inner region 36 for fastening the fastening elements 21, 22 on two matched coupling parts, wherein an elastic, rubber-like vulcanized-on spring element 41 is respectively present between the fastening elements 21 and 22 which are arranged in a ring-encircling manner and is fastened in a vulcanized-on manner to the adjacent metal fastening elements 21 and 22 which are shaped in a wedge-shaped manner in a vulcanizing process, so that an arrangement in a ring-encircling manner alternately of the metal wedge packet elements 21 and 22 and the elastic spring elements 41 introduced in alternation forms a wedge packet ring 40 which is produced in a vulcanizing process.From DE 198 55 593 A1, an arcuate toothed coupling is known, which has a first internally toothed coupling part, which can be mounted with a hub in a rotationally fixed manner on a drive shaft, and a second internally toothed coupling part, which can be mounted with a hub in a rotationally fixed manner, and a hollow cylindrical middle part, which connects the first and second coupling parts and has at each of its two ends a spherical external toothing which is convex on the circumference in the axial direction and engages in an internal toothing of the corresponding coupling parts. The coupling parts are sealed with respect to fixed housing parts and by shaft seals.Furthermore, DE 1 208 565 A discloses a toothed coupling for connecting two shaft ends, in which one coupling half is designed as a sleeve in which the one shaft end and the second coupling half are accommodated by drive connections, and in which the second coupling half connected to the other shaft end is supported on a part of the sleeve via a spring. The sleeve opening is closed by an end ring which surrounds the second coupling half and is connected to the sleeve, wherein the end ring provided on the sleeve has an axially inwardly projecting annular rib.In addition, DE 198 37 942 A1 discloses an arcuate toothed coupling having a first internally toothed coupling part which can be mounted with a hub in a rotationally fixed manner on a drive shaft, and having a second internally toothed coupling part which can be mounted with a hub in a rotationally fixed manner on a drive shaft, and having a central part which connects the first and second coupling parts and has, at each of its two ends, a convex external toothing which engages in the internal toothing of the corresponding coupling parts. Seals are arranged between the coupling parts and the central part, wherein the central part has in the region of the coupling parts in each case a coaxial, cylindrical guide surface on which in each case an inner sealing element of a seal is guided in an axially displaceable manner, while an outer sealing element is connected to the associated coupling part.DE 298 08 627 U1 discloses an arcuate toothed clutch for drive systems of rail vehicles, comprising two clutch hubs mounted in a rotationally fixed manner on one shaft end each, each having a straight toothing, and a clutch sleeve having arcuate toothings at the end, which are in engagement with the two straight toothings of the clutch hubs. The clutch sleeve has at each end a radial flange carrying the arc toothing, wherein limit stops for the offset movements of the clutch sleeve are arranged on one of the clutch hubs.And also known from US 2 737 033 A is a flexible clutch for connecting a driving and a driven element, the clutch comprising an externally toothed gear structure connected to one of the elements and having a tooth contact pitch circle, an internally toothed gear structure connected to the other element and having a tooth contact pitch circle slightly larger than the pitch circle of the externally toothed gear. The teeth are loosely fitted into each other of the gear structures to provide a radial clearance therebetween. Also, there is a corrugated elastic member fitted to the clearance and contacting the sides of the teeth of the toothed structures substantially at the respective pitch circles.The invention is based on the object of specifying a toothed coupling which is suitably designed in such a way that displacements which occur are substantially compensated, the coupling rigidity is significantly reduced, oscillations are damped and electrical insulation can be achieved.The object is achieved by the features of claim 1.In the tooth coupling with two connected tooth coupling halves, each of the tooth coupling halves has at least one external toothing part and one internal toothing part, which form a curved entrainment connection in the respective tooth coupling half, wherein at least one elastic sealing element is assigned to the entrainment connection, wherein, according to the characterizing part of claim 1, at least one elastic element is arranged at least in a region in which the tooth coupling halves are connected, and / or at least in a region of the internal toothing part and / or of the external toothing part of at least one tooth coupling half.Depending on the structure of the toothed coupling and the type of arrangement of the elastic element, the elastic element can be either disk-shaped, ring-shaped, cylindrical or wedge-shaped.The internal gear parts generally constitute internal gear coupling parts and the external gear parts constitute external gear coupling parts.In a toothed clutch, the internal toothing parts assigned to the toothed clutch halves can be designed as sleeves and the assigned external toothing parts as hubs, wherein the elastic element is connected in the connecting region to the first internal toothing part of the first toothed clutch half and to the second internal toothing part of the second toothed clutch half.In a further toothed coupling, the internal toothing parts assigned to the toothed coupling halves can be designed as a sleeve which is connected in each case to a hub part which is free of toothing and has an internal toothing, and the assigned external toothing parts can be designed in each case as a hub part which has an external toothing, wherein the elastic element is connected in the connecting region to the first external toothing part of the first toothed coupling half and to the second external toothing part of the second toothed coupling half.The elastic element can be configured annularly and can be arranged between the sleeve and the tooth-free hub part.The elastic member may be provided at the following positions of external teeth parts and internal teeth parts of the tooth clutch halves:between the first internal toothing part of the first toothed coupling half and the second internal toothing part of the second toothed coupling half, orbetween the first external toothing part of the first toothed coupling half and the second external toothing part of the second toothed coupling half, orbetween the first internal toothing part of the first toothed coupling half and the second external toothing part of the second toothed coupling half, orbetween the second internal toothing part of the second toothed coupling half and the first external toothing part of the first toothed coupling half.The elastic element can be introduced at the following other positions of internal toothing parts and external toothing parts of the tooth clutch halves, at leastas part of an internal toothing part of one of the toothed coupling halves and / oras part of an external toothing part of one of the tooth coupling halves.According to the invention, at least two metallic side elements are assigned to the elastic element for mounting, wherein the elastic element is vulcanized on / in between the two side elements, forming an elastic composite element as a whole.The elastic composite element containing the elastic element can also be fastened between mutually opposite inner sides of the tooth coupling halves and form an elastic connection between the two tooth coupling halves.In the case of a disk-like configuration of the elastic composite element with disk-like side elements on both sides, threaded bores can be made on the side elements on both sides, the threaded bores being provided for the screw connections of the elastic composite element on inner, mutually opposite flanges of the tooth coupling halves.The elastic element can be vulcanized directly onto the internal toothing part and can be firmly connected to the second flange of the second toothed coupling half via the associated first flange of the first toothed coupling half.The elastic composite element can be arranged in the axial direction as a rubber bushing with the embedded vulcanized-on elastic element between the two tooth coupling halves of the coupling housing connected to one another, wherein the elastic element is vulcanized-on / vulcanized-in in bushing form between the adjacent axially directed side elements.However, a coupling with a wedge packet ring with alternately arranged fastening elements and with elastic elements located between the adjacent fastening elements and designed as spring elements can also be introduced as an elastic composite element between the two tooth coupling halves.The associated elastic elements can be vulcanized in place between the adjacent fastening elements.The wedge packs, which are prestressed by pressing in between the fastening elements formed on the connecting contour, can form a closed ring.The wedge packet ring, which is formed as an elastic composite element, can thus be formed either as a closed ring or as a segmented joined ring.The internal toothing parts of the tooth clutch halves can be fixedly connected to the fastening elements of the wedge pack ring in a radial screw connection directed towards the tooth clutch axis when the fastening elements change.The elastic composite element can have at least one associated bearing point in relation to the internal toothing parts, wherein the bearing points are designed as slide bearings or roller bearings.At least one axial slide bearing can be inserted between a screwed mounting ring assigned to the internal toothing part of a toothed clutch half and the internal toothing part assigned to an inner cover on the toothed clutch half.Between the annular bushing assigned and screwed to the inner toothing part of the respective one toothed clutch half and the inner toothing part of the respective other toothed clutch half, at least one radial slide bearing can be inserted.In the flange region of the inserted elastic composite element, at least one mechanical breakdown protection unit assigned to the elastic composite element can be arranged.The breakdown prevention unit can consist of a bolt and a counterpart adapted to the bolt.The elastic sealing element assigned to the entrainment connection can be an elastic metallic corrugated pipe or an elastic rubber element or an elastic plastic element.The elastic element can be designed to be electrically insulating.The elastic member may be made of vulcanizable rubber.The elastic element can be configured annularly as a disk between two metallic disk-shaped side elements or as an axially extended cylindrical ring between two metallic axially extended side elements or as an elastic, rubber-like vulcanized spring element directed and shaped in a wedge-shaped manner toward the tooth coupling axis and adjusted in tension between two adjacent fastening elements configured as side elements.Developments and specific embodiments of the toothed coupling according to the invention are specified in dependent claims.The invention is explained in more detail by means of exemplary embodiments with reference to a plurality of drawings.The following are shown: FIG. 1 shows a schematic longitudinal sectional view of a conventional toothed coupling with toothed coupling halves in a static state, which are in fixed connection with one another directly on the inner sides of the respective coupling housings, according to the prior art, FIG. 2 shows a schematic longitudinal section illustration of a conventional toothed coupling with toothed coupling halves which are in fixed connection with one another directly on the inner sides of the respective coupling housings in the dynamic state according to FIG. 1 for the illustration of angular displacements, the axial displacement and the radial displacement which occur according to the prior art, FIG. 3 shows a schematic perspective illustration of a wedge pack ring according to the prior art, FIG. 4 shows a schematic longitudinal sectional view of a toothed coupling according to the invention with two connected toothed coupling halves and with an inserted elastic composite element aligned in the radial direction between the inner sides of the coupling housing of the respective toothed coupling halves, FIG. 4a is a schematic longitudinal sectional view of the toothed coupling according to the invention similar to FIG. 4 with toothed coupling halves in fixed connection with one another directly on the inner sides of the respective coupling housings in the dynamic state to show the angular displacement occurring, FIG. 5 shows an enlarged longitudinal sectional view of an elastic composite element according to FIG. 4 with metallic side elements and an annular disc-like elastic element vulcanized onto both sides therebetween, FIG. 6 shows a schematic illustration in half longitudinal section of a second toothed coupling with two connected toothed coupling halves according to the prior art, wherein the elastic composite element is arranged in the axial direction as a rubber bushing with an annular disc-like elastic element which is located between the two respective coupling parts and vulcanized onto both sides, FIG. 7 shows a schematic illustration in half longitudinal section of a third toothed coupling with two connected toothed coupling halves according to the prior art, wherein the elastic composite element is arranged in the radial direction as a wedge packet ring between the two toothed couplings, FIG. 8 shows a schematic illustration in half longitudinal section of the toothed coupling with two connected toothed coupling halves according to FIG. 7 according to the prior art, wherein the elastic composite element is arranged in the radial direction as a wedge pack ring between the two toothed coupling halves, wherein an axial slide bearing is inserted between the retaining ring assigned to the first sleeve of the first toothed coupling half and the inner cover on the second sleeve assigned to the second toothed coupling half, FIG. 9 shows a schematic illustration in half longitudinal section of the toothed coupling with two connected toothed coupling halves according to FIG. 7 according to the prior art, wherein the elastic composite element is arranged in the radial direction as a wedge pack ring between the two toothed coupling halves, wherein a radial slide bearing is inserted between the retaining ring assigned to the first sleeve of the first toothed coupling half and the inner cover on the second sleeve assigned to the second toothed coupling half, FIG. 10 shows a schematic longitudinal sectional view of the first toothed coupling according to the invention with two connected toothed coupling halves and with an elastic composite element inserted between the inner sides of the coupling housing of the respective toothed coupling halves and with a plurality of mechanical break-through securing units present in the flange region, and FIG. 11 is a schematic longitudinal sectional view of a toothed coupling with an elastic composite element containing the elastic element, with entrainment connections forming internal toothing parts and external toothing parts.In the following, FIGS. 4, 4 aand 7 are considered together, wherein a summary of all essential features of the tooth couplings according to the invention is presented first.In FIG. 4 as the main reference figure, a schematic longitudinal sectional representation of a first toothed coupling 30 with two connected toothed coupling halves 27, 28, wherein each of the toothed coupling halves 27, 28 has at least one external toothing part 3, 4 and one internal toothing part 5, 6, which form a curved entrainment connection 13, 14 in the respective toothed coupling half 27, 28, wherein at least one elastic sealing element 18, 47 is associated with the entrainment connection 13, 14.According to the invention, at least one elastic element 35 or a specific number of elastic elements 41 is arranged in segmented form at least in a region 56 in which the tooth coupling halves 27, 28 according to FIG. 4 or according to FIGS. 7, 8, 9 are connected within the tooth coupling 60.According to the invention, at least one elastic element 35 can also be arranged in at least one region 81 of the internal toothing part 71, 73 and / or in a region of the external toothing part 70, 72 of at least one tooth clutch half 27 or 28, as shown in FIG. 11.It is essential that at least one elastic element 35 or 41 is present in the tooth couplings 30, 50, 60, 80 described in detail hereinafter, which substantially dampens the oscillations that are generated in the tooth couplings 30, 50, 60, 80 and modifies the coupling stiffness.In the static, e.g. stationary state according to FIG. 4, the first tooth coupling half axis 15 and the second tooth coupling half axis 16 are located in agreement with the tooth coupling axis 59.The elastic element 35, 41 can be either disk-shaped, ring-shaped, cylindrical or wedge-shaped depending on the type of arrangement of the elastic element 35, 41 within the tooth coupling.In the tooth clutches 30, 50 described in more detail below, the internal toothing parts 5, 6 assigned to the tooth clutch halves 27, 28 are designed as sleeves and the assigned external toothing parts 3, 4 as hubs, wherein the elastic element 35 is connected in the connecting region 56 to the first internal toothing part 5 of the first tooth clutch half 27 and to the second internal toothing part 6 of the second tooth clutch half 28.The internal gear parts 5, 6 generally constitute internal gear coupling parts, and the external gear parts 3, 4 constitute external gear coupling parts.In a further toothed clutch 80, for example according to FIG. 11, the internal toothing parts 71, 72 assigned to the toothed clutch halves 27, 28 are each designed as a sleeve 74, 75 having an internal toothing which is connected to a respective non-toothing hub part 76, 77, and the assigned external toothing parts 70, 72 are each designed as a hub part having an external toothing, wherein the elastic element 35 is connected in the connecting region 56 to the first external toothing part 70 of the first toothed clutch half 27 and to the second external toothing part 72 of the second toothed clutch half 28.The elastic element 35 can also be of annular design and be arranged between the sleeve 74, 75 and the tooth-free hub part 76, 77 in the region 81.At least the elastic member 35 may be provided at the following positions of external teeth parts 3, 4; 70, 72 and internal teeth parts 5, 6; 71, 73 of the tooth clutch halves 27, 28:between the first internal toothing part 5; 71 of the first toothed coupling half 27 and the second internal toothing part 6; 73 of the second toothed coupling half 28, as shown in FIG. 4 or 11 as figure examples, orbetween the first external toothing part 3; 70 of the first toothed coupling half 27 and the second external toothing part 4; 72 of the second toothed coupling half 28, orbetween the first internal toothing part 5; 71 of the first toothed coupling half 27 and the second external toothing part 4; 72 of the second toothed coupling half 28, orbetween the second internal toothing part 6; 73 of the second toothed coupling half 28 and the first external toothing part 3; 70 of the first toothed coupling half 27.The aforementioned configurations of the toothed parts apply to variations of the clutches indicated in FIGS. 4 and 11.The elastic element 35 can furthermore be introduced, at least at the following positions of internal toothing parts 5, 6; 71, 72 and external toothing parts 3, 4; 70, 72 of the tooth clutch halves 27, 28as part of an internal toothing part 5, 6; 71, 73 of one of the toothed coupling halves 27, 28 and / oras part of an external toothing part 3, 4; 70, 72 of one of the tooth coupling halves 27, 28.At least two metallic side elements 33, 34; 53, 54; 21, 22 are assigned to the elastic element 35, 41 for mounting, wherein the elastic element 35, 41 is vulcanized / vulcanized in between the two side elements 33, 34; 53, 54; 21, 22, forming an elastic composite element 29 as a whole.The elastic composite element 29 can be fastened between mutually opposite inner sides 19, 20 of the tooth coupling halves 27, 28 and form an elastic connection between the two tooth coupling halves 27, 28.In the case of a disk-like configuration of the elastic composite element 29 with disk-like side elements 33, 34 on both sides, threaded bores 38, 39 can be made on the side elements 33, 34 on both sides, the threaded bores 38, 39 being provided for the screw connections 31, 32 of the elastic composite element 29 on inner flanges 42, 43 of the tooth coupling halves 27, 28.The elastic element 35 can be vulcanized directly onto the internal toothing part 5, 6 and can be firmly connected to the second flange 43 of the second toothed coupling half 28 via the associated first flange 42 of the first toothed coupling half 27.The elastic element 35 can also be vulcanized directly onto the external toothing part 3, 4.The elastic composite element 29 can be arranged in the axial direction as a rubber bushing with the embedded vulcanized-on elastic element 35 between the two tooth coupling halves 27, 28 of the coupling housing 2 connected to one another, wherein the elastic element 35 is vulcanized-on / vulcanized-in in bushing form between the adjacent axially directed side elements 53, 54.As an elastic composite element, a toothed coupling 60 with a wedge pack ring 40 with fastening elements 21, 22 arranged in alternation and with elastic elements 41 located between the adjacent fastening elements 21, 22 can be introduced between the two toothed coupling halves 27, 28.The elastic elements 41 are vulcanized on between the adjacent fastening elements 21, 22 and preferably wedge-shaped.Wedge packs which are prestressed by pressing in between the fastening elements formed on the connecting contour form a closed ring.The wedge packet ring 40 formed as an elastic composite element 29 can thus be formed either as a closed ring or as a segmented joined ring.The internal toothing parts 5, 6 of the toothed coupling halves 27, 28 can be fixedly connected to the fastening elements 21; 22 of the wedge pack ring 40 in a manner directed towards the toothed coupling axis 59 in the radial screw connection 55 when the fastening elements 21, 22 are changed.The elastic composite element 29 can have at least one associated bearing point in relation to the internal toothing parts 5, 6, wherein the bearing points 63, 68 are designed as slide bearings or roller bearings.At least one axial slide bearing 68 can be inserted between a mounting ring 57 screwed to the internal toothing part 5, 6 of a toothed coupling half 27, 28 and the internal toothing part 6, 5 assigned to an inner cover 46, 45 on the toothed coupling half 28, 27.At least one radial slide bearing 63 can be inserted between the annular bushing 62 assigned to and screwed to the internal toothing part 5, 6 of the respective one toothed coupling half 27, 28 and the internal toothing part 6, 5 of the respective other toothed coupling half 28.In the flange region 56 of the inserted elastic composite element 29, at least one mechanical breakdown protection unit 64 assigned to the elastic composite element 29 can be arranged.The breakdown prevention unit 64 may be composed of a bolt and a counterpart matched to the bolt.The elastic sealing member 18, 47 may be an elastic metallic corrugated tube or an elastic rubber member or an elastic plastic member.The elastic element 35 can be embodied as electrically insulating.The elastic member 35 may be made of vulcanizable rubber.The elastic element 35 can be configured in the form of a ring or as a disk between two metallic ring- or disk-shaped side elements 33, 34, or as an axially extended cylindrical ring between two metallic axially extended side elements 53, 54, or as a spring element 41 directed and shaped in a wedge-like manner toward the tooth coupling axis 59 and adjusted in tension between two adjacent fastening elements 21, 22 configured as side elements.Tooth couplings 30, 50, 60, 80 will be explained in more detail below with reference to FIGS. 4 to 11 :In FIG. 4, the elastic element 35 according to the invention is located between the first clutch housing part, which is designed as an internal toothing part 5, of the first toothed clutch half 27 and the second clutch housing part, which is designed as an internal toothing part 6, of the second toothed clutch half 28.The elastic element 35 shown in FIG. 4 is located within an elastic composite element 29 which is directed between the first coupling housing part 5 of the first toothed coupling half 27 and the second coupling housing part 6 of the second toothed coupling half 28 in the radial direction to the coupling axis 59, wherein the inserted elastic composite element 29 is provided with the elastic element 35 vulcanized onto the inside of the walls of the side elements 33, 34.The coupling housing 2 expediently consists of the coupling housing parts 5, 6 which are designed to be largely part-symmetrical and are screwed together by means of the first screw connection 31 and the second screw connection 32 on the mutually facing flanges 42, 43 which are present on the coupling housing parts 5, 6. The first flange 42 belongs to the first toothed coupling half 27 and the second flange 43 is assigned to the second toothed coupling half 28. The respective clutch housing parts 5, 6 have a radially directed inner cover 45, 46-a first inner cover 45 and a second inner cover 46-each sealing off the clutch part inner region 17, 65.In FIG. 4, the first clutch housing part 5 and the second clutch housing part 6 are shown as sleeves and the first clutch part 3 and the second clutch part 4 as hubs, wherein a first shaft 66 can be located in the first hub 3 and a second shaft 67 can be located in the second hub 4.The coupling parts 3, 4, similar to FIGS. 1 and 2, have external teeth 9, 10 with arched coupling teeth on their outer circumferential region 7. The clutch housing 2 has internal teeth 11, 12 on its inner circumferential region 8. The external teeth 9, 10 of the coupling parts 3, 4 and the internal teeth 11, 12 of the coupling housing 2 form in the coupling housing parts 5, 6 in each case a curved entrainment tooth 13, 14 which is sealed and protected by the elastic sealing element 18, 47 and in which, in accordance with a relative movement between the coupling parts 3, 4 and the coupling housing parts 5, 6 with respect to one another, the internal teeth 11, 12 and the external teeth 9, 10 can also be moved relative to one another. The relative movement arises as a result of axial and / or angular deflections of the coupling parts 3, 4 with respect to the coupling housing parts 5, 6.On the inner sides 19, 20 between the clutch housing 2 and the clutch parts 3, 4 there is provided in each case an annular disk-shaped cover 45, 46 which protects the driving tooth arrangements 13, 14 and the associated free space 17, 65-a first cover 45 and a second cover 46.Between the coupling housing 2 or the coupling housing parts 5, 6 and each associated coupling part 3, 4, the elastic sealing element 18, 47 fastened to the two coupling parts 3, 4 on the one hand and coupling housing parts 5, 6 on the other hand can be arranged as an axially directed corrugated tube which both seals the associated arched driving toothing 13, 14 and resiliently adjusts a predefined position of the coupling housing 2. The first corrugated tube 18 and the second corrugated tube 47 are made of a metallic material.Instead of the corrugated tubes 18, 47, other elastic metallic sealing elements sealing off the entrainment connection 13, 14 can also be introduced.FIG. 4 ashows a schematic longitudinal sectional representation of the tooth coupling 30 according to the invention largely similar to FIG. 4 with tooth coupling halves 27, 28 in a dynamic state, which are directly connected to one another on the inner sides 19, 20 of the respective coupling housing parts 5, 6 by means of the annular elastic composite element 29 including the elastic element 35, in order to represent the angular displacement occurring at the displacement angle δ.Similar to FIG. 2, the relative movement between the clutch housing parts (sleeves) 5, 6 is indicated by the deflection of the clutch parts 3, 4 (hubs) with respect to one another, as shown in FIG. 4 a, wherein the relative movement is shown by a deflection / displacement angle δ between the clutch part axes of rotation 15, 16 and the clutch housing axis of rotation 59.Thus, with the toothed coupling 30, an axial displacement compensation and a radial displacement compensation as well as an angular displacement compensation are possible. The rigidity is present due to the use of metallic material. However, one advantage of the toothed coupling 30 according to the invention is that, by using the elastic element 35, the oscillations occurring between the toothed coupling halves 27, 28 can be damped at all compared to the toothed couplings 1 of the prior art without the elastic element 35 and a specific adaptation of the rigidity and an electrical insulation become possible.In general, tooth couplings are largely made of metallic materials.The elastic composite element 29 with the vulcanized-on elastic element 35 can be arranged at the following positions of coupling parts 3, 4 and coupling housing parts 5, 6 of the tooth coupling halves 27, 28 of the tooth coupling 30, namely betweenthe first sleeve 5 of the first toothed coupling half 27 and the second sleeve 6 of the second toothed coupling half 28, as shown in FIG. 4, orthe first hub 3 of the first toothed coupling half 27 and the second hub 4 of the second toothed coupling half 28 orthe first sleeve 5 of the first toothed coupling half 27 and the second hub 4 of the second toothed coupling half 28 orthe second sleeve 6 of the second toothed coupling half 28 and the first hub 3 of the first toothed coupling half 27.The latter three possibilities of the positions of hubs 3, 4 and sleeves 5, 6 are not shown.The elastic element 35 can be configured annularly as a disk between two metallic disk-shaped side elements 33, 34 (FIGS. 4 and 4 a, 5, 10) or as an axially extended cylindrical ring between two metallic axially extended side elements 53, 54 (FIG. 6 ) or as an elastic, rubber-like vulcanized-on spring element 41 (FIGS. 7, 8, 9 ) directed and shaped in a wedge-shaped manner toward the coupling axis 59 and introduced between two adjacent fastening elements 21, 22 configured as side elements.FIG. 5 shows a longitudinal sectional view, enlarged compared to FIG. 4, of the elastic composite element 29 with two metallic annular side elements 33, 34-the first side element 33 and the second side element 34-and the annular disc-like elastic element 35 vulcanized on the wall-both side therebetween. Threaded bores 38, 39-first threaded bores 38 and second threaded bores 39-are introduced on both sides of the lateral elements 33, 34, which threaded bores are provided for the screw connections 31 and 32 of the composite element 29 on the flanges 42, 43 of the coupling housing parts 5 and 6.A schematic illustration in the half longitudinal section of a second toothed coupling 50 according to the invention with two connected toothed coupling halves 27, 28 is shown in FIG. 6, wherein the elastic composite element 29 is arranged in the axial direction as a rubber bushing with the embedded vulcanized-on cylindrical elastic element 35 between the two toothed coupling halves 27, 28 firmly connected to one another. The fixed connection is effected by screw connections 49 in the threaded bores 48 between the two flanges 42, 43 of the coupling housing parts 5 and 6. Here too, the inserted elastic element 35 is vulcanized onto the axially directed first side element 53-flange bushing outer part-and the axially directed second side element 54-bushing inner part.However, a direct vulcanization of the elastic element 35 onto the sleeve 6 can also be provided.In another embodiment (not shown), there can also be an identical configuration of the toothed coupling 50 with the axially incorporated elastic element 35.FIG. 7 shows a schematic illustration, drawn in half longitudinal section, of a third toothed coupling 60 according to the invention having two connected toothed coupling halves 27, 28, the elastic composite element 29 being arranged in the radial direction as an elastic coupling with a wedge packet ring 40 between the two toothed coupling halves 27, 28. For this purpose, one of the possible fastening variants of the wedge packet ring 40 constituting the elastic composite element 29 is explained in more detail below:The end part 69 of the second sleeve 6 is firmly screwed to the fastening elements 21, 22 of the wedge packet ring 40 constituting an elastic composite element 29 via the radial screw connection 55. The fastening elements 21, 22 are fastened to the first flange 42 of the first sleeve 5 by means of the axial screw connections 51, 52. Between the adjacent fastening elements 21, 22 there are arranged the elastic spring elements 41 which are vulcanized on in a wedge-shaped manner and are designed as elastic elements 35.Furthermore, a retaining ring 57 clamping the first cover 45 at least to the first flange 42 is connected to the first flange 42 of the first sleeve 5 by means of a screw connection 26. The second cover 46 is fastened by means of the screw connection 58 to the end wall of the end part 69 of the second sleeve 6.A free space may be present between the mounting ring 57 and the screwed-on second cover 46.The respective predetermined sleeves 5 or 6 of the tooth coupling halves 27, 28 can be connected alternately to the fastening elements 21, 22 in an alternating axial screw connection 51, 52 and a radial screw connection 55, so that one of the adjacent fastening elements 21, 22 has the screw connections 51, 52 and the other of the adjacent fastening elements 22, 21 has the screw connection 55.Thus, not only is there a material formation of the elastic element 35 closed as in FIGS. 4 to 6 present over the entire elastic composite element 29, but a segmented elastic element formation of the elastic composite element 29 can also be present.The elastic composite element 29 can have at least one additional bearing point in relation to the clutch housing parts 5, 6 in order to improve the running properties.For this purpose, FIG. 8 shows a schematic illustration, drawn in half longitudinal section, of a third toothed coupling 60 with the two connected toothed coupling halves 27, 28 according to FIG. 7, wherein the elastic composite element 29 is arranged between the two toothed coupling halves 27, 28 in the radial direction as an elastic coupling with the wedge packet ring 40 according to FIG. 3. One of the bearing points for one of the possible fastening variants is explained in more detail below:Between the threaded retaining ring 57 assigned to the first sleeve 5 of the first toothed coupling half 27 and the second cover 46 on the second sleeve 6 assigned to the second toothed coupling half 28, an axial slide bearing 68 is inserted. The retaining ring 57 clamping the first cover 45 is connected to the first flange 42 of the first sleeve 5 by means of the screw connection 26. The second cover 46 is fastened by means of the screw connection 58 to the end wall of the end part 69 of the second sleeve 6.The end part 69 is connected to the fastening elements 21, 22 by means of the radial screw connection 55 in a screwed manner. The fastening elements 21, 22 are fastened to the first flange 42 by means of the axial screw connections 51, 52. Between the adjacent fastening elements 21, 22 there are arranged the elastic spring elements 41 which are vulcanized on in a wedge-shaped manner and are designed as elastic elements 35.FIG. 9 shows a schematic illustration of the third toothed coupling 60 with the two connected toothed coupling halves 27, 28 according to FIG. 7, wherein the elastic connecting element 29 is arranged in the radial direction as a wedge packet ring 40 between the two toothed coupling halves 27, 28.A further bearing point for one of the possible fastening variants is explained in more detail below:Between the first sleeve 5 of the ring bush 62 assigned to and screwed to the first toothed coupling half 27 and the second sleeve 6 on the second toothed coupling half 28 a radial slide bearing 63 is inserted. The annular bushing 62 is firmly connected to an annular part 61 which is connected to the first sleeve 5 of the first toothed coupling half 27 via a screw connection 44. The second sleeve 6 closes the flange region 56 by means of the hollow cylindrical end part 69, and the radial bearing 63 is mounted on the one hand on the annular bushing 62 and on the other hand on the inner wall of the end part 69. The end part 69 is firmly connected to the fastening elements 21, 22 by means of the radial screw connection 55. The fastening elements 21, 22 are fastened to the first flange 42 by means of the axial screw connections 51, 52. Between the adjacent fastening elements 21, 22 there are arranged the elastic spring elements 41 which are vulcanized on in a wedge-shaped manner and are designed as elastic elements 35.In principle, a combination of at least one axial slide bearing and at least one radial slide bearing can also be used as bearing points.FIG. 10 shows a schematic longitudinal sectional illustration of the first toothed coupling 30 according to the invention according to FIG. 4 with two connected toothed coupling halves 27, 28 and with an elastic connecting element 29 inserted between the inner sides 19, 20 of the coupling housing 2, 26 of the respective toothed coupling halves 27, 28 and a plurality of mechanical break-through securing units 64 assigned to the elastic connecting element 29 and located in the flange region 56.FIG. 11 shows a toothed coupling 80 in a schematic longitudinal sectional illustration with an elastic composite element 29 and with two connected toothed coupling halves 27, 28, wherein each of the toothed coupling halves 27, 28 has at least one external toothing part 70, 72 and one internal toothing part 71, 73, which form a curved driver connection 13, 14 in the respective toothed coupling half 27, 28, wherein at least one elastic sealing element 18, 47 is assigned to the driver connection 13, 14.According to the invention, at least one elastic element 35 is arranged in the region 56 in which the tooth coupling halves 27, 28 are connected.According to the invention, at least one elastic element 35 can also be arranged in the region 81-as shown in FIG. 11 with the reference number 81-of the internal toothing part 71, 73 and / or of the external toothing part 70, 72 with respect to a further toothed clutch 80 (in FIG. 11 ), wherein the relevant region of the external toothing part 70, 72 is not drawn.The elastic element 35 can be either disk-shaped or ring-shaped depending on the type of arrangement of the elastic element 35.In the toothed coupling 80, the elastic element 35 is arranged within the elastic composite element 29 in the connecting region 56 with the first external toothing part 70 of the first toothed coupling half 27 and with the second external toothing part 72 of the second toothed coupling half 28. The first external toothing part 70 has the first external toothing 9 at one free end and the first flange 42 at the other free end. The second external toothing part 72 has the second external toothing 10 at one free end and the second flange 43 at the other end. The elastic composite element 29 is fastened to the two flanges 42 and 43 of the associated external toothing parts 70, 72. The first internal toothing part 71 consists of a toothing-free hub part 76 and a first sleeve part 74 fastened thereto and having the first internal toothing 11; the second internal toothing part 73 consists of a toothing-free hub part 77 and a second sleeve part 75 fastened thereto and having the second internal toothing 12.Here too, the entrainment connections 13 and 14 are present, which are each sealed by an elastic rubber ring 18, 47 as elastic sealing elements.The region 81, in which an annular elastic element 35 can also be arranged, is located in the region between the screw connections 78, 79 of the tooth-free hub parts 76, 77 and the sleeve parts 74, 75 having the internal teeth 11, 12.In the toothed coupling 80 according to FIG. 11, in which the internal toothing parts 71, 73 assigned to the toothed coupling halves 27, 28 are each designed as a sleeve 74, 75 having an internal toothing which is connected to a respective non-toothing hub part 76, 77, and the external toothing parts 70, 72 assigned to the toothed coupling halves 27, 28 are each designed as a hub part having an external toothing, the elastic element 35 is connected in the connecting region 56 to the first external toothing part 70 of the first toothed coupling half 27 and to the second external toothing part 72 of the second toothed coupling half 28.The tooth couplings 30, 50, 60 and 80 according to the invention represent a substantial further development of the tooth coupling 1 of the prior art and comprise at least the two connected tooth coupling halves 27, 28, which compensate for the displacements according to the prior art, as well as the elastic composite elements 29 located between the two tooth coupling halves 27, 28 with the respectively incorporated elastic elements 35, 41 according to the invention for the predetermined modified adaptation of the stiffness and furthermore even for the damping of oscillations occurring and for electrical insulation within the tooth couplings 30, 50, 60 and 80.List of reference characters1 Tooth coupling according to the prior art 2 Coupling housing 3 First coupling part / hub 4 Second coupling part / hub 5 First coupling housing part / sleeve 6 Second coupling housing part / sleeve 7 Outer circumferential region 8 Inner circumferential region 9 First external toothing 10 Second external toothing 11 First internal toothing 12 Second internal toothing 13 First driving toothing 14 Second driving toothing 15 First tooth coupling half axis 16 Second tooth coupling half axis 17 First coupling part inner region 18 First elastic sealing element / first corrugated tube 19 First inner side 20 Second inner side 21 First fastening element 22 Second fastening element 23 Fitted screw 24 First bore 25 Second bore 26 Screw connection for retaining ring 57 27 First tooth coupling half 28 Second tooth coupling half 29 Elastic composite element 30 First tooth coupling 31 First screw 32 Second screw 33 First side element 34 Second side element 35 Elastic element 36 Inner ring region 37 Outer ring region 38 First threaded bore 39 Second threaded bore 40 Wedge pack ring according to the prior art 41 Elastic element / elastic spring element 42 First flange 43 Second flange 44 Screwing of the ring part 45 First inner cover 46 Second inner cover 47 Second elastic sealing element / second corrugated tube 48 Bore for fitted screw 49 Screwing 50 Second toothed coupling 51 First axial screwing 52 Second axial screwing 53 Outer flange sleeve part / side element 54 Inner sleeve part / side element 55 Radial screwing 56 Flange region 57 Screwed retaining ring for first inner cover 45 58 Screwing for second inner cover 46 59 Toothed coupling axis 60 Third toothed coupling 61 Ring part of the ring sleeve 62 Ring sleeve 63 Radial slide bearing 64 Penetration securing unit 65 Second inner coupling part region 66 First shaft 67 Second shaft 68 Second shaft 68 Axial slide bearing 69 End part 70 External toothing part 71 Internal toothing part 72 External toothing part 73 Internal toothing part 74 Internal toothing-comprising sleeve part 75 Internal toothing-comprising sleeve part 76 Toothing-free hub part 77 Toothing-free hub part 78 Screw connection 79 Screw connection 80 Toothed coupling 81 Range δ Displacement angle of the toothed coupling halves

Claims

A toothed coupling (30, 50, 60; 80) having two connected toothed coupling halves (27, 28), each of the toothed coupling halves (27, 28) having at least one external toothing part (3, 4; 70, 72) and one internal toothing part (5, 6; 71, 73), which form a curved entrainment connection (13, 14) in the respective toothed coupling half (27, 28), the entrainment connection (13, 14) being assigned at least one elastic sealing element (18, 47), characterized in that at least in one region (56) in which the toothed coupling halves (27, 28) are connected, and / or in at least one region (81) of the internal toothing part (5, 6; 71, 73) and / or of the external toothing part (3, 4; 70, 72) of at least one toothed coupling half (27; 28 ) at least one elastic element (35, 41) damping between the two coupling halves (27, 28) is arranged, wherein at least two metallic side elements (33, 34; 53, 54; 21, 22) are assigned to the elastic element (35) for mounting, wherein the elastic element (35) is vulcanized on / in between the two side elements (33, 34; 53, 54; 21, 22), forming an elastic composite element (29) as a whole.Toothed coupling according to claim 1, characterised in that the elastic element (35) is either disc-shaped, ring-shaped, cylindrical or wedge-shaped depending on the type of arrangement of the elastic element (35).Toothed coupling according to Claim 1 or 2, characterized in that, in a toothed coupling (30, 50, 60), the internal toothing parts (5, 6) assigned to the toothed coupling halves (27, 28) are designed as sleeves and the assigned external toothing parts (3, 4) are designed as hubs, wherein the elastic element (35) is connected in the connecting region (56) to the first internal toothing part (5) of the first toothed coupling half (27) and to the second internal toothing part (6) of the second toothed coupling half (28).The toothed coupling according to claims 1 to 3, characterized in that in a toothed coupling (80) the internal toothing parts (71, 73) assigned to the toothed coupling halves (27, 28) are each designed as a sleeve (74, 75) having an internal toothing which is connected to a tooth-free hub part (76, 77) and the assigned external toothing parts (70, 72) are each designed as a hub part having an external toothing, wherein the elastic element (35) is connected in the connecting region (56) to the first external toothing part (70) of the first toothed coupling half (27) and to the second external toothing part (72) of the second toothed coupling half (28).Toothed coupling according to Claim 4, characterized in that the elastic element (35) is of disc-shaped or annular design and is arranged between the sleeve (74, 75) and the hub part (76, 77) which is free of teeth.The toothed coupling according to claims 3 and / or 4, characterized in that at least the elastic element (35) is present at the following positions of external toothing parts (3, 4; 70, 72) and internal toothing parts (5, 6; 71, 73) of the toothed coupling halves (27, 28): - between the first internal toothing part (5; 71) of the first toothed coupling half (27) and the second internal toothing part (6; 73) of the second toothed coupling half (28) or - between the first external toothing part (3; 70) of the first toothed coupling half (27) and the second external toothing part (4; 72) of the second toothed coupling half (28) or - between the first internal toothing part (5; 71) of the first toothed coupling half (27) and the second external toothing part (4; 72) of the second toothed coupling half (28) or - between the second internal toothing part (6; 72) of the second toothed coupling half (28); 73) of the second toothed coupling half (28) and the first external toothing part (3; 70) of the first toothed coupling half (27).The toothed coupling according to claims 1 to 6, characterized in that the elastic element (35) is introduced at the following positions of internal toothing parts (5, 6; 71, 72) and external toothing parts (3, 4; 70, 72) of the toothed coupling halves (27, 28), at least - as part of an internal toothing part (5, 6; 71, 73) of one of the toothed coupling halves (27, 28) and / or - as part of an external toothing part (3, 4; 70, 72) of one of the toothed coupling halves (27, 28).Toothed coupling according to claims 1 to 6, characterised in that the elastic composite element (29) is fastened between mutually opposite inner sides (19, 20) of the toothed coupling halves (27, 28) and forms an elastic connection between the two toothed coupling halves (27, 28).Toothed coupling according to Claim 8, characterized in that, in the case of a disc-like configuration of the elastic composite element (29) with disc-like side elements (33, 34) on both sides, threaded bores (38, 39) are made on the side elements (33, 34) on both sides, the threaded bores (38, 39) for the screw connections (31, 32) of the elastic composite element (29) being provided on inner flanges (42, 43) of the toothed coupling halves (27, 28).Toothed coupling according to one of the preceding claims, characterized in that the elastic element (35) is vulcanized directly onto the internal toothing part (5, 6) or external toothing part (3, 4).Toothed coupling according to Claim 8, characterized in that the elastic composite element (29) is arranged in the axial direction as a rubber bush with the embedded vulcanized-on elastic element (35) between the two mutually connected toothed coupling halves (27, 28) of the coupling housing (2), wherein the elastic element (35) is vulcanized-on / vulcanized-in in bush form between the adjacent axially directed side elements (53, 54).Toothed coupling according to Claim 8, characterized in that a coupling with a wedge pack ring (40) with fastening elements (21, 22) arranged in alternation and with elastic elements (41) located between the adjacent fastening elements (21, 22) is introduced between the two toothed coupling halves (27, 28) as the elastic composite element.Toothed coupling according to claim 12, characterised in that the elastic elements (41) are vulcanized in place between the adjacent fastening elements (21, 22).Toothed coupling according to claim 12 or 13, characterised in that wedge packs which are prestressed by pressing in between the fastening elements formed on the connecting contour form a closed ring.Toothed coupling according to claims 12 to 14, characterised in that the wedge packet ring (40) formed as an elastic composite element (29) is formed either as a closed ring or as a ring joined together in a segmented manner.Toothed coupling according to claim 12, characterised in that the internal toothing parts (5, 6) of the toothed coupling halves (27, 28) are fixedly connected to the fastening elements (21; 22) of the wedge pack ring (40) in a radial screw connection (55) directed towards the toothed coupling axis (59) when the fastening elements (21, 22) are changed.Toothed coupling according to claims 10 to 16, characterised in that the elastic composite element (29) has at least one associated bearing point in relation to the internal toothing parts (5, 6), wherein the bearing points (63, 68) are designed as slide bearings or roller bearings.Toothed coupling according to claim 17, characterised in that at least one axial slide bearing (68) is inserted between a mounting ring (57), which is screwed to the internal toothed part (5, 6) of a toothed coupling half (27, 28), and the internal toothed part (6, 5) assigned to an inner cover (46, 45) on the internal toothed part (6, 5) assigned to a toothed coupling half (28, 27).Toothed coupling according to claim 17, characterised in that at least one radial slide bearing (63) is inserted between the annular sleeve (62) assigned and screwed to the inner toothed part (5, 6) of the respective one toothed coupling half (27, 28) and the inner toothed part (6, 5) of the respective other toothed coupling half (28).Toothed coupling according to one of the preceding claims, characterized in that the bearing points are a combination of at least one axial slide bearing and at least one radial slide bearing.Toothed coupling according to Claim 1, characterized in that at least one mechanical breakdown protection unit (64) assigned to the elastic composite element (29) is arranged in the flange region (56) of the inserted elastic composite element (29).Toothed coupling according to claim 21, characterised in that the penetration protection unit (64) consists of a bolt and a counter piece adapted to the bolt.Toothed coupling according to Claim 1, characterized in that the elastic sealing element (18, 47) represents an elastic metallic corrugated pipe or an elastic rubber element or an elastic plastic element.Toothed coupling according to claim 1, characterised in that the elastic element (35) is designed to be electrically insulating.Toothed coupling according to claim 1, characterised in that the elastic element (35) consists of vulcanizable rubber.Toothed coupling according to at least one of Claims 1 to 25, characterized in that the elastic element (35) is designed annularly as a disc between two metallic disc-shaped side elements (33, 34) or as an axially extended cylindrical ring between two metallic axially extended side elements (53, 54) or as an elastic, rubber-like vulcanized-on spring element (41) which is directed and shaped in a wedge-like manner with respect to the toothed coupling axis (59) and is adapted in tension between two adjacent fastening elements (21, 22) which are designed as side elements.

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