DE102023207996A1 - coupling arrangement, electrical machine arrangement and vehicle - Google Patents

Abstract

The present invention relates to a coupling arrangement (1) for coupling a first electrical machine (50) to a second electrical machine (60), wherein the coupling arrangement comprises a coupling tube (3) and/or an external coupling frame arrangement (10), wherein the coupling tube (3) is designed such that a first output shaft (51) of the first electrical machine (50) can be coaxially coupled to a second output shaft (61) of the second electrical machine (60), and the coupling frame arrangement (10) is designed such that a first housing arrangement (53) of the first electrical machine (50) can be coupled to a second housing arrangement (63) of the second electrical machine (60). The invention further relates to an electrical machine arrangement (100) with the coupling arrangement (1) according to the invention and to a vehicle (200) with the electrical machine arrangement (100).

Description

The present invention generally relates to a coupling arrangement for coupling a first electrical machine to a second electrical machine, an electrical machine arrangement and a vehicle with the electrical machine arrangement.

It is well known that two motors can be coupled together. Electric motors are particularly suitable for this. By coupling them, an increase in performance can be achieved with relatively little effort. The advantage of this is that existing electric motors can be used. This means that there is no need to develop a new electric motor with increased performance. This saves time and money. This can be particularly useful for vehicles with small production runs, for example in the hobby sector and in motorsports. But also for systems in assembly or production construction.

Another advantage of coupling two electric motors is that, depending on the design, the torque can be distributed differently on the two output shafts. With this arrangement, the yaw angle of a vehicle can be influenced by influencing the torque distribution. This allows a vehicle to additionally steer, for example (torque vectoring).

One challenge when coupling two electric motors is ensuring proper cooling and lubrication while at the same time ensuring that the two electric motors are properly supported and aligned with each other. If this is not the case, the electric motors cannot operate at full power. There is also a risk of premature wear. In the worst case, a total failure can occur during operation.

Electric motors sometimes rotate at very high speeds. To achieve an optimal increase in performance, the mechanical coupling of the electric motors must be able to withstand very high torque loads. At the same time, sufficient cooling and lubrication must be ensured in both electric motors and in the coupling. To achieve the best possible increase in the vehicle's performance, the additional weight resulting from the coupling of both electric motors must also be kept as low as possible. However, if the coupling arrangement is undersized, it can break in the area of the coupling.

Furthermore, the radial and axial alignment of the two electric motors to each other must be as precise as possible and the connection of the two electric motors to the vehicle must be as uncomplicated as possible.

The object of the present invention is therefore to provide an improved coupling arrangement for coupling two electrical machines, an improved electrical machine arrangement and an improved vehicle in which the disadvantages and problems specified above are at least partially reduced.

This object is achieved by the coupling arrangement according to claim 1, the electrical machine arrangement according to claim 9 and the vehicle according to claim 15.

Further aspects and features of the present invention emerge from the dependent claims, the accompanying drawings and the following description of embodiments.

According to a first aspect, the present invention provides a coupling arrangement for coupling a first electrical machine to a second electrical machine, wherein the coupling arrangement comprises a coupling tube and/or an external coupling frame arrangement, wherein the coupling tube is designed such that a first output shaft of the first electrical machine can be coaxially coupled to a second output shaft of the second electrical machine, and the coupling frame arrangement is designed such that a first housing arrangement of the first electrical machine can be coupled to a second housing arrangement of the second electrical machine. The coupling arrangement can comprise the coupling tube. The coupling arrangement can comprise the coupling frame arrangement. The coupling arrangement can comprise the coupling tube and the coupling frame arrangement.

The first electrical machine can be an electric motor. The second electrical machine can be an electric motor. The coupling arrangement can couple two electrical machines of the same construction or two different electrical machines.

The coupling tube can be designed such that the first output shaft can be coupled to the second output shaft in a driving manner. The coupling tube can transmit a torque. The coupling tube can be designed such that it is arranged on a common axis of rotation with the first and second output shafts.

The coupling tube can be designed so that the first output shaft in the area of a front side can be coupled to the second output shaft in the region of a front side. The coupling tube can be designed such that the first output shaft can be coupled to the second output shaft in a drivingly effective manner.

The external coupling frame arrangement can be designed such that it can be coupled to the first and second housing arrangements outside the first and second housing arrangements. The coupling frame arrangement can be designed such that a connection structure of a vehicle can also be coupled to the two electrical machines.

With the coupling arrangement, two existing electrical machines can be coupled together to increase performance. With the coupling arrangement, two electrical machines can be coupled mechanically and hydraulically to form a double drive.

The coupling frame arrangement allows the two electrical machines to be aligned axially with respect to one another. The coupling frame arrangement allows the two electrical machines to be aligned axially with respect to one another. The coupling frame arrangement allows the two electrical machines to be aligned without any distance from one another. The coupling frame arrangement allows the two electrical machines to be aligned radially with respect to one another. The coupling frame arrangement can provide torque support. The coupling frame arrangement can absorb tolerances.

The coupling frame arrangement allows the two electrical machines to be sufficiently cooled and lubricated.

The coupling arrangement enables a lighter construction, as support and screwing are carried out on the housing arrangement and not in the area of a bearing plate. In addition, the coupling arrangement enables a modular and cost-effective construction.

Before a detailed description of the figures, general remarks on the embodiments follow.

There are embodiments in which the coupling tube is designed in such a way that the two output shafts can be coaxially coupled to each other via a hollow shaft section.

The two output shafts can have an identical hollow shaft section. The two output shafts can have a different hollow shaft section. The hollow shaft section can extend through the entire output shaft. The hollow shaft section can extend along a non-continuous section of the output shaft.

The coupling tube can be designed so that the two output shafts can be mechanically connected via the hollow shaft section. The coupling tube can be designed so that it forms a rotationally fixed connection with the hollow shaft section. The rotationally fixed connection can be a spline or another shaft-hub connection. External teeth can be formed on the coupling tube. External teeth can be formed on both end faces of the coupling tube.

This coupling arrangement can be used, for example, in longitudinally arranged machines. This can lead to an increase in performance.

The coupling tube can be designed in such a way that it can be coupled to the two output shafts in an upright position via a bearing arrangement. This coupling arrangement can be used, for example, for transversely arranged machine arrangements. For example, this arrangement allows the two electrical machines to be controlled independently of one another. This can be used, for example, to control torque distribution. This can be used, for example, to enable torque vectoring when cornering. This can be used, for example, to supply both electrical machines with a fluid via a central supply.

There are embodiments in which the coupling arrangement further comprises a functional sleeve, wherein the functional sleeve envelops the coupling tube between the first and the second housing arrangement.

The functional sleeve can be cylindrical. The functional sleeve can completely enclose the coupling tube. The functional sleeve can be aligned coaxially or concentrically to the coupling tube.

The functional sleeve can guide the coupling tube. The coupling tube can be guided in the functional sleeve. A guide section can be formed in the functional sleeve.

The functional sleeve can be arranged in a sealing manner to the first and second housing arrangement. The coupling tube can rotate within the functional sleeve. The functional sleeve cannot rotate when the coupling tube rotates. The functional sleeve can be stationary.

The functional sleeve and the coupling pipe enable a common fluid supply to the first and second electrical machines.

There are embodiments in which the functional sleeve comprises a centering section for coaxial alignment with the coupling tube.

The functional sleeve can comprise two centering sections. The centering section can be formed on an end face of the functional sleeve. The centering section can be ring-shaped. The centering section can be flange-like. One or more receiving recesses can be formed in the centering section. The receiving recess can be a through hole.

There are embodiments in which the coupling tube comprises a coaxial through-hole.

The coupling tube can be designed as a hollow tube. The coupling tube can be designed like a wave. The through-hole can be a through-hole. The through-hole can help to ensure a sufficient fluid supply. The fluid supply can be cooling and/or lubrication.

There are embodiments in which the coupling arrangement comprises a first fluid inlet on the functional sleeve and a second fluid inlet on the coupling tube, which form a common inlet to the through-hole.

The first fluid inlet can be a recess in the radial direction. The first fluid inlet can be a radial bore. The first fluid inlet can be a continuous recess through the entire wall thickness of the functional sleeve.

The second fluid inlet can comprise a radial recess in the radial direction. The second fluid inlet can be a radial bore. The second fluid inlet can be a continuous recess through the entire wall thickness of the coupling tube. The coupling tube can comprise a plurality of radial recesses. The plurality of radial recesses can be arranged in the circumferential direction around the axis of rotation.

The second fluid inlet can comprise a circumferential groove geometry. The groove geometry can be delimited by two annular sections. The annular sections can have a larger diameter than an outer diameter of the coupling tube. The annular sections can be sealed all the way around an inner surface of the functional sleeve. The groove geometry can form a chamber between the functional sleeve and the coupling tube.

The second fluid inlet can comprise the radial recess and the groove geometry. The radial recess and the groove geometry can be connected to one another. The recess and the groove geometry can form a common chamber between the functional sleeve and the coupling tube.

A fluid can be introduced into the through-hole via the first fluid inlet. This ensures an optimal fluid supply (lubrication and cooling). The first and second fluid inlets can be used to supply fluid together to the first and second electrical machines. This means that two independent circuits for fluid supply are not required, for example. This means that a second fluid supply is not required, for example.

There are embodiments in which the coupling frame arrangement comprises a ring element arrangement and a spacer arrangement, wherein the ring element arrangement can be coupled externally to the first and second housing arrangements.

The ring element arrangement and the spacer arrangement can be coupled to one another in a torque-resistant manner. The ring element arrangement can be coupled radially to the housing arrangement in the outer region. The ring element arrangement can be coupled radially to the housing arrangement at several positions.

Several interface receptacles can be formed on the ring element arrangement. The ring element arrangement can be coupled to the housing arrangement via the interface receptacle. The coupling frame arrangement can also be coupled to a frame of a vehicle, for example, via the interface receptacle.

The spacer arrangement can be designed such that the first and second electrical machines can be arranged axially spaced from one another.

The coupling frame arrangement allows the two assembled electrical machines to be subsequently mechanically coupled to each other without having to dismantle one of the electrical machines.

The coupling frame arrangement can absorb tolerances. The coupling frame arrangement can be designed to be load-appropriate and weight-optimized. The coupling frame arrangement can be designed according to a maximum torque load between the two electrical machines.

There are embodiments in which the ring element arrangement comprises two ring elements and the spacer arrangement comprises a spacer, wherein the two ring elements are coaxially connected to one another via the spacer.

The ring element can be a plate-shaped ring element. The two ring elements can be identical or different.

The spacer arrangement can comprise one or more spacers. The spacer arrangement can mechanically connect the two ring elements to each other at several positions.

• - die erfindungsgemäße Koppelanordnung;
• - eine erste und eine zweite elektrische Maschine mit jeweils einem Rotor, einer Abtriebswelle und einer Gehäuseanordnung,

wobei die erste Abtriebswelle zu der zweiten Abtriebswelle über ein Koppelrohr koaxial gekoppelt ist und/oder die erste Gehäuseanordnung zu der zweiten Gehäuseanordnung über eine Koppelrahmenanordnung außenliegend gekoppelt ist.A second aspect of the application relates to an electrical machine arrangement comprising:

• - the coupling arrangement according to the invention;
• - a first and a second electric machine, each having a rotor, an output shaft and a housing arrangement,

wherein the first output shaft is coaxially coupled to the second output shaft via a coupling tube and/or the first housing arrangement is externally coupled to the second housing arrangement via a coupling frame arrangement.

The electrical machine arrangement may comprise two electrical machines. The electrical machine arrangement may comprise two electric motors. The electrical machine arrangement may be a traction motor of a vehicle. The electrical machine arrangement may be a traction motor of a crane or a cable winch.

The output shaft can be arranged coaxially or concentrically within the rotor. The rotor can be coupled to the output shaft via a functional carrier. The rotor can be cylindrical. The rotor can be arranged rotatably within a stator.

The output shaft can be a hollow shaft. The output shaft can be a drive shaft. The output shaft can be an output shaft.

The housing assembly may include a housing and a housing cover, respectively. The rotor may be disposed within the housing assembly. The stator may be disposed within the housing assembly. The output shaft may be partially disposed within the housing assembly. The output shaft may partially protrude from the housing assembly.

The first output shaft and the second output shaft can have a common axis of rotation. The first output shaft and the second output shaft rotate about a common axis of rotation during operation.

The first output shaft may be coaxially coupled to the second output shaft via the coupling tube. The first housing arrangement may be externally coupled to the second housing arrangement via the coupling frame arrangement. The first output shaft may be coaxially coupled to the second output shaft via the coupling tube and the first housing arrangement may be externally coupled to the second housing arrangement via the coupling frame arrangement.

The first and/or the second output shaft can be mounted floatingly to the coupling tube. The first and/or the second output shaft can be mounted floatingly to the coupling tube, each with a stop on the coupling tube.

There are embodiments in which the two output shafts each comprise a hollow shaft section and the coupling tube is arranged on both sides partially within the two hollow shaft sections.

The two output shafts can be designed as hollow tubes and coupled to each other via the coupling tube. The coupling tube can be inserted into one hollow shaft section of each of the two output shafts at the same time.

The coupling tube can be arranged in a rotating or stationary manner between the two output shafts in the manner already described above.

There are embodiments in which the coupling frame arrangement is coupled to the two housing arrangements via a fastening arrangement in an edge region of the two housing arrangements on the outside.

The respective fastening arrangements can be designed as a through-hole. A wall thickness in the area of the fastening arrangements can be greater than a remaining wall thickness of the housing arrangement. The fastening arrangement can be arranged in each case in an edge area of the housing arrangement, circumferentially along the housing arrangement.

Each electric machine may include a mounting arrangement. The mounting arrangement may include a first mounting arrangement formed in the housing. The mounting arrangement may include a second mounting arrangement formed in the housing cover.

The first fastening arrangement can be concentrically aligned with the second fastening arrangement. A diameter of the first and the second fastening arrangement can be identical. The coupling frame arrangement can be mounted or dismounted from the outside of the housing arrangement. The coupling frame arrangement can be mounted or dismounted from the housing arrangement without having to dismount the housing cover from the housing. The coupling frame arrangement can be coupled to the housing arrangement without having to dismount the housing cover from the housing.

There are embodiments in which the coupling arrangement comprises a functional sleeve, which is connected to a bearing plate of each of the two housing arrangements.

A bearing arrangement for the output shaft can be arranged in the bearing shield. The functional sleeve can be connected to the bearing shield of the housing arrangement via the centering section.

An annular recess can be formed on the bearing plate. The centering section can be inserted into the annular recess to fill it. The centering section can be inserted into the annular recess. The functional sleeve can be centered on the bearing plate radially to the axis of rotation.

The functional sleeve can be connected to one or both bearing shields in a rotationally fixed manner in the area of the annular recess. The functional sleeve can be screwed to the bearing shield in a rotationally fixed manner in the area of the annular recess.

A sealing groove can be formed in the area of the bearing plate. The functional sleeve and the housing arrangement can be connected to one another in a sealing manner via the sealing groove in the bearing plate.

There are embodiments in which the two electrical machines are supplied with a fluid via a first fluid inlet on the functional sleeve.

The fluid may be oil. The fluid may be another lubricant and/or coolant. The fluid may lubricate and/or cool the electrical machine assembly.

The two electrical machines can be supplied with fluid in different ways. This allows the electrical machine arrangement to be optimally lubricated. This allows the electrical machine arrangement to be optimally cooled.

In a first variant, the fluid supply can be carried out as follows: The fluid can be introduced from the outside via the first fluid inlet. The fluid can flow from the first fluid inlet via the groove geometry and the radial recess of the second fluid inlet into the through-hole of the coupling tube. The fluid can be transported axially via the through-hole. The fluid can be transported radially via the radial recess. The fluid can lubricate the bearing arrangement of the output shaft via both the through-hole and the radial recess. Furthermore, the fluid can be transported axially into the output shaft via the through-hole. From the output shaft, the fluid can be transported further axially within the electrical machine. The fluid in the electrical machine can be discharged radially via radial bores in the output shaft.

In a second variant, the fluid supply can be carried out as follows: The fluid can be introduced from the outside on one side and/or both sides via the front side of the hollow output shaft. The fluid can also be introduced centrally. The fluid can be transported axially along the output shaft within the output shaft. The fluid in the electric machine can be discharged radially via radial holes in the output shaft. The fluid can be transported axially through the coupling pipe. The fluid can be discharged radially within the coupling pipe. The front side can be sealed fluid-tight using a closure element.

In a third variant, the fluid supply can be via an oil exchanger. The fluid supply can be via a rectangular ring. In the third variant, the fluid can be introduced via an opening in the housing arrangement. The opening can be connected to the oil exchanger.

There are embodiments in which the first electric machine further comprises a first transmission arrangement and/or the second electric machine further comprises a second transmission arrangement wherein the first and second gear assemblies are each arranged within the rotor.

The gear arrangement can be a planetary gear arrangement. The first and the second gear arrangement can each be arranged coaxially to the output shaft within the rotor. The first and/or the second gear arrangement can each be arranged on a side of the rotor that faces away from the coupling arrangement.

The rotor can be coupled to the output shaft in a drive-effective manner via the planetary gear arrangement. The rotor can be coupled to the output shaft in a drive-effective manner via the function carrier and the planetary gear arrangement.

The gear arrangement can be supplied with fluid via the first fluid inlet on the functional sleeve. The gear arrangement can also be lubricated via the coupling arrangement. The gear arrangement can also be cooled via the coupling arrangement.

A third aspect of the application relates to a vehicle with the electrical machine arrangement according to the invention.

The electric machine assembly may be a traction motor of the vehicle. The vehicle may be, for example, a motorcycle, a scooter, a quad, an ATV, a buggy, an armored vehicle, a snowmobile, a boat, or an eVTOL. The vehicle may also be another electric vehicle. The vehicle may also be a crane or a winch.

• 1 eine schematische Ansicht einer erfindungsgemäßen elektrischen Maschinenanordnung mit einer erfindungsgemäßen Koppelanordnung;
• 2a eine Schnittansicht der elektrischen Maschinenanordnung mit der Koppelanordnung;
• 2b eine Detailansicht eines Koppelrohrs mit einer Funktionshülse;
• 2c eine Detailansicht einer Koppelrahmenanordnung;
• 3 eine perspektivische Ansicht der Koppelanordnung;
• 4 eine perspektivische Ansicht der Maschinenanordnung;
• 5a-c verschiedene Varianten zur Fluidversorgung der elektrischen Maschinenanordnung;
• 6a ein Fahrzeug, bei dem die elektrische Maschinenanordnung mit der Koppelanordnung die Hinterräder antreibt;
• 6b ein Fahrzeug, bei dem die elektrische Maschinenanordnung mit der Koppelanordnung alle vier Räder antreibt;
• 6c ein Zweirad, bei dem die elektrische Maschinenanordnung mit der Koppelanordnung ein Hinterrad antreibt;
• 6d ein Schneefahrzeug, bei dem die elektrische Maschinenanordnung mit der Koppelanordnung eine Raupe antreibt und
• 6e ein Wasserfahrzeug, bei dem die elektrische Maschinenanordnung mit der Koppelanordnung einen Propeller antreibt.

The invention is explained in more detail below by way of example and with reference to the accompanying figures. Identical or similar components are designated by the same reference numerals. They show:

• 1 a schematic view of an electrical machine arrangement according to the invention with a coupling arrangement according to the invention;
• 2a a sectional view of the electrical machine arrangement with the coupling arrangement;
• 2b a detailed view of a coupling tube with a functional sleeve;
• 2c a detailed view of a coupling frame arrangement;
• 3 a perspective view of the coupling arrangement;
• 4 a perspective view of the machine arrangement;
• 5a -c different variants for the fluid supply of the electrical machine arrangement;
• 6a a vehicle in which the electric machine arrangement with the coupling arrangement drives the rear wheels;
• 6b a vehicle in which the electric machine arrangement with the coupling arrangement drives all four wheels;
• 6c a two-wheeler in which the electric machine arrangement with the coupling arrangement drives a rear wheel;
• 6d a snow vehicle in which the electrical machine arrangement with the coupling arrangement drives a caterpillar and
• 6e a watercraft in which the electrical machine arrangement with the coupling arrangement drives a propeller.

1 shows the electrical machine arrangement 100 with the coupling arrangement 1 according to the invention in a schematic view. The electrical machine arrangement 100 comprises a first electrical machine 50 and a second electrical machine 60. Each of the electrical machines 50, 60 comprises a rotor 55, 65, an output shaft 51, 61, a housing arrangement 53, 63 and a gear arrangement 59, 69. The first and second electrical machines 50, 60 are arranged coaxially about the axis of rotation R at a distance from one another.

The two electrical machines 50, 60 are connected to one another via the coupling arrangement 1. The coupling arrangement 1 comprises an external coupling frame arrangement 10 and a coupling tube 3. The first and second housing arrangements 53, 63 are mechanically coupled to one another via the external coupling frame arrangement 10. The first and second output shafts 51, 61 are coupled to one another via the coupling tube 3. The coupling tube 3 is enclosed by a functional sleeve 20. The functional sleeve 20 is arranged between the first and second housing arrangements 53, 63.

The coupling frame arrangement 10 further comprises a ring element arrangement 11 and a spacer arrangement 13. The ring element arrangement 11 is mechanically coupled to the housing arrangement 53, 63 in an outer edge region of the housing arrangement 53, 63. The spacer arrangement 13 is arranged between the ring element arrangement 11 and mechanically coupled to the spacer arrangement 13.

2a to 2c show the electrical machine arrangement 100 with the coupling arrangement 1 in a sectional view. 2b and 2c each show a different detailed view of the section view from 2a .

2a shows the complete electrical machine arrangement 100. The two electrical machines 50, 60 are arranged according to the 1 coupled to each other in the manner described.

The electrical machine arrangement 100 has an output on both sides. At the two outputs of the output shaft 51, 61, a drive element 80 is connected to the output shaft 51, 61 outside the housing arrangement 53, 63. The gear arrangement 59, 69 of the two electrical machines 50, 60 is arranged on one side inside the rotor 55, 65, which is inclined away from the coupling arrangement 1. The gear arrangement 59, 69 is each coupled to the output shaft 51, 61 in a driving manner via a function carrier 4. The function carrier 4 is each operatively connected to the rotor 55, 65.

The output shafts 51, 61 are both designed as continuous hollow shafts, each arranged coaxially to the axis of rotation R. The output shafts 51, 61 have a hollow shaft section 51a, 61a.

The two output shafts 51, 61 are coupled to each other via the coupling tube 3. The coupling tube 3 is arranged coaxially with the rotation axis R. The coupling tube 3 is inserted on one end face of the two output shafts 51, 61 via a spline partially in the hollow shaft sections 51a, 61a of the two output shafts 51, 61.

In the area outside the two electrical machines 50, 60, the coupling tube 3 is surrounded by a functional sleeve 20. The functional sleeve 20 is cylindrical with different diameters in the axial direction.

The housing arrangement 53, 63 comprises a housing 53b, 63b and a housing cover 53c, 63c. The two housing covers 53c, 63c are arranged directly opposite each other on the side of the coupling tube 3. A bearing plate 53a, 63a is formed on each of the two housing covers 53c, 63c. The functional sleeve 20 is arranged between the two housing covers 53c, 63c. The functional sleeve 20 is connected to both bearing plates 53a, 63a.

The electrical machine 50, 60 is mechanically coupled in an outer region of the two housing arrangements 53, 63 via the coupling frame arrangement 10. The coupling frame arrangement 10 is mechanically coupled to the two electrical machines 50, 60 via a fastening arrangement 57, 67. The fastening arrangement 57, 67 is arranged in the edge region of the housing arrangement 53, 63.

The coupling frame arrangement 10 comprises the ring element arrangement 11 and the spacer arrangement 13. The ring element arrangement 11 is composed of two plate-shaped ring elements 11a, 11b. Several interface receptacles 14 are formed on the ring elements 11a, 11b. The ring element 11a is connected to the first housing arrangement 53 via the fastening arrangement 57 and the interface receptacle 14. The ring element 11b is connected to the second housing arrangement 63 via the fastening arrangement 67 and the interface receptacle 14. The two ring elements 11a, 11b are aligned parallel and spaced apart from one another. The spacer arrangement 13 is arranged between the two ring elements 11a, 11b. The spacer arrangement 13 mechanically connects the two ring elements 11a, 11b to one another.

2b shows a detailed view of the coupling tube 3 with the functional sleeve 20 from 2a .

The coupling tube 3 has an axial through-hole 3a. The coupling tube 3 is designed as a hollow tube. The coupling tube 3 has a fluid inlet in the middle, which is referred to below as the second fluid inlet 3e. The second fluid inlet 3e is made up of several radial recesses 3d and a groove geometry 3c. The radial recesses 3d are arranged centrally along a circumferential direction around the coupling tube. The radial recesses 3d form an inlet between the outside of the coupling tube 3 and the through-hole 3a. The groove geometry 3c is formed on the outside (outer surface) of the coupling tube 3 around the radial recesses 3d. The outside of the coupling tube 3 forms a groove base of the groove geometry 3c. The groove geometry 3c is delimited on both sides by two annular sections 3b. The two ring-shaped sections 3b have a larger diameter than the outer diameter of the coupling tube 3. The two ring-shaped sections 3b are connected in a fluid-tight manner to an inner surface of the functional sleeve 20. The groove geometry 3c forms a common chamber with the inner surface of the functional sleeve 20.

An external toothing is formed on each of the two end faces of the coupling tube 3. An internal toothing is formed on the corresponding end faces of the two output shafts 51, 61 in the hollow shaft section 51a, 61a. The coupling tube 3 forms a hollow shaft with the two output shafts 51, 61 a spline. The through-hole 3a forms a common passage with the two hollow shaft sections 51a, 61a.

The two output shafts 51, 61 are each mounted in a bearing arrangement 52, 62. The bearing arrangement 52, 62 are arranged in the bearing plate 53a, 63a.

The functional sleeve 20 seals the coupling tube 3. An annular centering section 20a is formed on each of the two end faces of the functional sleeve 20. An annular recess 53d, 63d is formed on each of the bearing plates 53a, 63a. The two centering sections 20a are arranged in a filling and centering manner in the annular recesses 53d, 63d. The functional sleeve 20 is connected in a rotationally fixed manner to the bearing plates 53a, 63a via the centering sections 20a.

A first fluid inlet 21 is also formed on the functional sleeve 20. The first fluid inlet 21 is a continuous recess in the radial direction. The first fluid inlet 21 is aligned centrally. The first fluid inlet 21 forms a common inlet to the through-recess 3a with the second fluid inlet 3e.

2c shows a detailed view of the coupling frame arrangement 10 with the fastening arrangement 67 from 2a . In 2c The coupling of the coupling frame arrangement 10 with the second electrical machine 60 is shown as an example. The coupling with the first electrical machine 50 is analogous and is shown in 2c not shown.

The fastening arrangement 67 is arranged and formed on the edge region of the housing arrangement 63. The fastening arrangement 67 is arranged in a reinforcing shell region of the housing arrangement 63. The fastening arrangement 67 comprises a plurality of first fastening arrangements 67a and a plurality of second fastening arrangements 67b. As an example, in 2c only a first and a second fastening arrangement 67a, 67b are shown. The first fastening arrangement 67a is arranged in the housing 63b. The second fastening arrangement 67b is arranged in the housing cover 63c. Both fastening arrangements 67a, 67b are each designed as a through-hole in an axial direction. The two through-holes run parallel to the axis of rotation R.

The two fastening arrangements 67a, 67b are aligned coaxially and concentrically to one another. The two fastening arrangements 67a, 67b form a common through-hole in the housing arrangement 63. The common through-hole is shown by two dashed lines.

The second ring element 11b of the ring element arrangement 11 rests against the second fastening arrangement 67b. The interface receptacle 14 in the ring element 11b is arranged concentrically to the second fastening arrangement 67b. The second ring element 11b is mechanically coupled to the housing arrangement 63 via the interface receptacle 14 and the common through-hole. The second ring element 11a is connected to a spacer 13a of the spacer arrangement 13.

3 shows a perspective view of the coupling arrangement 1 in a non-installed state. The coupling arrangement 1 comprises the ring-shaped coupling frame arrangement 10, the coupling tube 3 and the functional sleeve 20. The coupling frame arrangement 10 is composed of the ring element arrangement 11 and the spacer arrangement 13. The ring element arrangement 11 comprises the first ring element 11a and the second ring element 11b. The two ring elements 11a, 11b are aligned parallel and spaced apart from one another. The two ring elements 11a, 11b are connected to one another via a plurality of spacers 13a. The plurality of spacers 13a are arranged in the circumferential direction in the edge region of the ring element arrangement 11.

In the two ring elements 11a, 11b of the ring element arrangement 11, several interface receptacles 14 are formed as bores.

4 shows a perspective view of the electrical machine arrangement 100 with the coupling arrangement 1 in an installed state. The first and the second electrical machine 50, 60 are coupled to one another via the coupling arrangement 1. In 4 the second output shaft 61 protrudes from the second housing arrangement 63. The second output shaft 61 is connected to the drive element 80.

5a to 5c show different variants for supplying the electrical machine arrangement 100 with a fluid F. In all three variants, the fluid F is introduced from the outside and then distributed within the electrical machine arrangement 100.

5a shows the first variant. The view from 5a essentially corresponds to the view of 2b . The fluid F flows from the first fluid inlet 21 via the groove geometry 3c and the radial recess 3d of the second fluid inlet 3e into the through-hole 3a of the coupling tube. The fluid F is transported axially. The fluid F is transported radially via the radial recess 3d. The fluid F lubricates the two bearing arrangements 52, 62 of the two output shafts 51, 61 via both the through-hole 3a and the radial recess 3d. The fluid F is also transported axially via the through-hole 3a into the hollow shaft sections 51a, 61a of the two output shafts 51, 61. From the output shafts 51, 61, the fluid is transported further axially within the electrical machine 50, 60. The fluid F is discharged radially in the electrical machine 50, 60 via radial bores in the output shafts 51, 61.

5b shows the second variant. The view from 5b essentially corresponds to the view of 2a . The fluid F is introduced from the outside on one side, for example via the front side of the hollow shaft section 61a of the second output shaft 61. The fluid F is conveyed axially along the second output shaft 61 within the second output shaft 61. The fluid F is radially discharged in the second electrical machine 60 via radial bores in the second output shaft 61. The fluid F is conveyed axially through the coupling pipe 3. The fluid F is radially discharged in the coupling pipe 3. The fluid F is conveyed via the coupling pipe 3 from the second output shaft 61 or its hollow shaft section 61a into the hollow shaft section 51a of the first output shaft 51. The fluid F is radially discharged in the first electrical machine 60 via radial bores in the first output shaft 51.

5c shows the third variant. In the third variant, the fluid supply is via an oil transfer device 71 with a rectangular ring. The fluid F is introduced from the outside via an opening in the housing arrangement 53, 63 (not shown) and conveyed to the oil transfer device 71. The hollow output shaft 51, 61 is sealed fluid-tight on the front side by a closure element 73.

6a to 6e show schematically different vehicles 200 with the electrical machine arrangement 100 with the coupling arrangement 1.

In 6a the vehicle 200 has four wheels. In the vehicle 200, only the rear wheels are driven. The electric machine arrangement 100 is arranged on a rear drive axle. The drive axle is connected to the rear wheels. The electric machine arrangement 100 is connected to the rear drive axle. The electric machine arrangement 100 has an output on both sides. The two output shafts 51, 61 are each connected to the drive axle. The two output shafts 51, 61 run in the same direction as the rear drive axle. The two output shafts 51, 61 are aligned in a transverse direction to the vehicle 200.

In 6b The vehicle has 200 four wheels. Unlike 6a In the vehicle 200, all four wheels are driven. A differential is arranged between the front axle and the rear axle. The front axle and the rear axle are each connected to two wheels. The two differentials are connected to each other via a two-part cardan shaft. The front differential is connected to a front part of the cardan shaft. The rear differential is connected to a rear part of the cardan shaft.

The electric machine arrangement 100 is arranged between the cardan shaft. The electric machine arrangement 100 has an output on both sides. The first output shaft 51 is connected to the front part of the cardan shaft. The second output shaft 61 is connected to the rear part of the cardan shaft. In contrast to 6a are in 6b the two output shafts 51, 61 are aligned in a longitudinal direction of the vehicle 200.

6c shows the vehicle 200 schematically as a two-wheeler. The electric machine arrangement 100 has a one-sided output. An output shaft 51, 61 is connected to a rear wheel via a traction drive. The output shaft 51, 61 is aligned parallel to a rotation axis of the rear wheel.

6d shows the vehicle 200 schematically as a snow vehicle. The electrical machine arrangement 100 has a one-sided output. An output shaft 51, 61 is connected to a transmission shaft via a traction drive. The transmission shaft is coupled to a drive track via several transmission elements. The output shaft 51, 61 is aligned parallel to a rotation axis of the transmission shaft.

6e shows the vehicle 200 schematically as a watercraft. The electrical machine arrangement 100 has a one-sided output. An output shaft 51, 61 drives a propeller via a shaft arrangement.

The coupling arrangement according to the invention and the electrical machine arrangement according to the invention are not limited to use in the vehicles described above. The coupling arrangement and the electrical machine arrangement can also be used for another vehicle or in the non-automotive sector. Further aspects and embodiments of the present invention will become apparent to the person skilled in the art within the scope of the claims.

reference sign

1

coupling arrangement

3

coupling tube

3a

through hole

3b

annular section

3c

groove geometry

3D

Radial recess

3e

Second fluid inlet

4

officials

10

coupling frame arrangement

11

ring element arrangement

11a

First Ring Element

11b

Second ring element

13

spacer arrangement

13a

spacers

14

interface recording

20

functional sleeve

20a

centering section of the functional sleeve

21

First fluid inlet

50

First electric machine

51

First output shaft

51a

hollow shaft section of the first output shaft

52

bearing arrangement of the first output shaft

53

First housing arrangement

53a

End shield of the first electric machine

53b

First Housing

53c

First housing cover

53d

Annular recess

53e

sealing groove

55

Rotor of the first electric machine

57

Mounting arrangement of the first electrical machine

57a

First fastening arrangement

57b

Second mounting arrangement

59

First gear arrangement

60

Second electric machine

61

second output shaft

61a

hollow shaft section of the second output shaft

62

bearing arrangement of the second output shaft

63

Second housing arrangement

63a

bearing plate of the second electrical machine

63b

Second housing

63c

Second housing cover

63d

Annular recess

63e

sealing groove

65

rotor of the second electric machine

67

Mounting arrangement of the second electrical machine

67a

First fastening arrangement

67b

Second mounting arrangement

69

Second gear arrangement

71

oil exchanger

73

closure element

80

drive element

100

Electrical Machine Arrangement

200

vehicle

F

fluid

R

axis of rotation

Claims (15)

Coupling arrangement (1) for coupling a first electrical machine (50) to a second electrical machine (60), wherein the coupling arrangement comprises a coupling tube (3) and/or an external coupling frame arrangement (10), wherein the coupling tube (3) is designed such that a first output shaft (51) of the first electrical machine (50) can be coaxially coupled to a second output shaft (61) of the second electrical machine (60), and the coupling frame arrangement (10) is designed such that a first housing arrangement (53) of the first electrical machine (50) can be coupled to a second housing arrangement (63) of the second electrical machine (60). Coupling arrangement (1) according to claim 1 , wherein the coupling tube (3) is designed such that the two output shafts (51, 61) can each be coaxially coupled to one another via a hollow shaft section (51a, 61a). Coupling arrangement (1) according to claim 1 or 2 , wherein the coupling arrangement (1) further comprises a radio functional sleeve (20), wherein the functional sleeve (20) envelops the coupling tube (3) between the first and the second housing arrangement (53, 63). Coupling arrangement (1) according to claim 3 , wherein the functional sleeve (20) comprises a centering section (20a) for coaxial alignment with respect to the coupling tube. Coupling arrangement (1) according to one of the preceding claims, wherein the coupling tube (3) comprises a coaxial through-hole (3a). Coupling arrangement (1) according to claim 5 , wherein the coupling arrangement (1) comprises a first fluid inlet (21) on the functional sleeve (20) and a second fluid inlet (3e) on the coupling tube (3), which form a common inlet to the through-hole (3a). Coupling arrangement (1) according to one of the preceding claims, wherein the coupling frame arrangement (10) comprises a ring element arrangement (11) and a spacer arrangement (13), wherein the ring element arrangement (11) can be coupled externally to the first and the second housing arrangement (53, 63). Coupling arrangement (1) according to claim 7 , wherein the ring element arrangement (11) comprises two ring elements (11a, 11b) and the spacer arrangement (13) comprises a spacer (13a), wherein the two ring elements (11a, 11b) are coaxially connected to one another via the spacer (13a). Electrical machine arrangement (100) comprising: - a coupling arrangement (1) according to one of the preceding claims; - a first and a second electrical machine (50, 60), each with a rotor (55, 65), an output shaft (51, 61) and a housing arrangement (53, 63), wherein the first output shaft (51) is coaxially coupled to the second output shaft (61) via a coupling tube (3) and/or the first housing arrangement (53) is externally coupled to the second housing arrangement (63) via a coupling frame arrangement (10). Electrical machine arrangement (100) according to claim 9 , wherein the two output shafts (51, 61) each comprise a hollow shaft section (51a, 61a) and the coupling tube (3) is arranged on both sides partially within the two hollow shaft sections (51a, 61a). Electrical machine arrangement (100) according to claim 9 or 10 , wherein the coupling frame arrangement (10) is coupled to the two housing arrangements (53, 63) via a respective fastening arrangement (57, 67) in an edge region of the two housing arrangements (53, 63) on the outside. Electrical machine arrangement (100) according to one of the preceding claims, wherein the coupling arrangement (1) comprises a functional sleeve (20) which is connected to a respective bearing plate (53a, 63a) of the two housing arrangements (53, 63). Electrical machine arrangement (100) according to one of the preceding claims, wherein the two electrical machines (50, 60) are supplied with a fluid (F) via a first fluid inlet (21) on the functional sleeve (20). Electric machine arrangement (100) according to one of the preceding claims, wherein the first electric machine (50) further comprises a first gear arrangement (59) and the second electric machine (60) further comprises a second gear arrangement (69), wherein the first and the second gear arrangement (59, 69) are each arranged within the rotor (55, 65). Vehicle (200) with an electrical machine arrangement (100) according to one of the Claims 9 until 14 .

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