DE19943048B4 - drive system - Google Patents

Abstract

Drive system, in particular for a motor vehicle, comprising a drive shaft (12) and an electric machine (35), by means of which the drive shaft (12) can be driven for rotation or / and electrical energy can be obtained upon rotation of the drive shaft (12), wherein the electric machine ( 14) comprises a stator assembly (18) and a rotor assembly (32) rotatable with the drive shaft (12), further comprising a torsional vibration damper assembly (16) comprising at least one damper member (78) disposed between a primary side (64) and a secondary side (16). 66) of the torsional vibration damper assembly (16) for permitting relative rotation, the rotor assembly (32) comprising a support assembly (40) rotatably connectable or connected to the drive shaft (12) and having an interaction region (54) in a first support region (54). 30) of the rotor assembly (32) and in a second support portion (56) having a primary side (64) of the torsion Damping arrangement (16) rotatably connected or connected, characterized in that the Torsionsschwingungsdämpferanordnung (16) independent of a final assembled state of the electric machine (14) to the rotor assembly (32) can be coupled and disconnected.

Description

The present invention relates to a drive system according to the preamble of claim 1.

From the DE 196 31 384 C1 a drive system is known in which an inner rotor rotor is rotatably connected to a drive shaft and connected to an output shaft which leads to a transmission via a Torsionsschwingungsdämpferanordnung. The Torsionsschwingungsdämpferanordnung lies radially within the inner rotor rotor and thus also radially within the inner rotor surrounding the rotor outside and overlaps axially with the rotor and thus the stator. Although here an axially relatively short construction arrangement is shown, this specific embodiment requires a relatively difficult to be carried out construction method, since the inner rotor rotor with the Torsionsschwingungsdämpferanordnung essentially forms an assembly which is then coupled to both the drive shaft and the output shaft.

The EP 0 706 462 B1 discloses a drive system in which an external rotor rotor is coupled via a torsional vibration damper assembly to an output shaft. This output shaft is further coupled via a friction clutch to a drive shaft. This ultimately means that there is no direct connection of the rotor to the drive shaft, so that for starting the vehicle, the clutch must be forced to be held in an engaged state. When the vehicle and running drive unit used in this drive system electric machine is not able to feed electrical energy into the electrical system or in an accumulator o. The like., As the output shaft in this state does not rotate and thus the rotor with respect the stator is not moved.

Post-published with respect to the present patent application DE 199 14 376 A1 a drive system of the type mentioned is known, wherein the electric machine and the Torsionsschwingungsdämpferanordnung are set together and simultaneously on the drive shaft of an internal combustion engine. As disadvantageous it is felt that the structural integration of the electric machine and Torsionsschwingungsdämpferanordnung on the one hand in the assembly of the unit so formed on a drive unit for a mechanic restricted manageable and secondly, the electric machine must be at least partially disassembled in case of service in an exchange of the torsional vibration ,

Starting from the mentioned prior art, it is an object of the present invention to provide a drive system which is easy to set up with good functionality.

According to the invention this object is achieved by a drive system, in particular for a motor vehicle, comprising a drive shaft and an electric machine, through which the drive shaft is driven for rotation and / or upon rotation of the drive shaft electrical energy can be obtained, the electric machine, a stator and a with the Drive shaft rotatable rotor assembly further comprising a Torsionsschwingungsdämpferanordnung comprising at least one damper element which acts between a primary side and a secondary side of the Torsionsschwingungsdämpferanordnung to allow relative rotation.

In this drive system is further provided that the rotor assembly comprises a support assembly which is rotatably connected or connected to the drive shaft and which carries in a first support portion an interaction region of the rotor assembly and rotatably connected or connected in a second support portion with a primary side of the Torsionsschwingungsdämpferanordnung, wherein the Torsionsschwingungsdämpferanordnung is independent of a final assembled state of the electric machine can be coupled to the rotor assembly.

In the drive system according to the invention, the interaction region of the rotor assembly and the Torsionsschwingungsdämpferanordnung are decoupled in terms of components, as they are supported separately from each other on the support assembly. This simplifies the construction significantly. Furthermore, since the rotor arrangement is connected to the drive shaft via the carrier arrangement, it is also possible for the vehicle, that is to say the vehicle, to be stationary when the vehicle is stationary. H. when disengaged clutch, the rotor assembly are rotated and thus generate the electric machine electrical energy and feed, for example, in the electrical system.

According to a further aspect of the present invention may be provided in the Anriebssystem that the electric machine is an external rotor machine with an arranged radially outside the stator assembly interaction region of the rotor assembly.

A particularly space-saving design can be obtained if the Torsionsschwingungsdämpferanordnung is at least partially radially disposed within the stator and / or if the Torsionsschwingungsdämpferanordnung overlaps at least partially axially with the stator.

Furthermore, an optimally exploiting the existing space arrangement can be created in that the support assembly is at least partially pot-shaped and that the Torsionsschwingungsdämpferanordnung extends at least partially axially into the cup-shaped carrier assembly.

The torsional vibration damper assembly may be constructed such that the primary side of the torsional vibration damper assembly comprises a first cover disk member and a second cover disk member fixedly connected to the first cover disk member, and at least the first cover disk member is connected or connectable to the support assembly in the second support portion. Here too, a very space-saving embodiment can be obtained in that the cover disk element connected or connectable with the carrier arrangement overlaps at least partially axially with the carrier arrangement in or near the second support area.

For example, it can be provided that the carrier assembly comprises in its first support portion a plurality of circumferentially successive first support portions and in its second support portion comprises a plurality of circumferentially consecutive second support portions. It is possible that between at least two first support portions, a second support portion is arranged. Such an alternating arrangement of first and second support sections is particularly advantageous with regard to the transmission of forces in the region of the support arrangement.

In particular, in the embodiment of the electric machine as external rotor machine, it is advantageous if the first support region is arranged in a radially outer region of the carrier arrangement. Furthermore, it can be provided that the second support region is arranged radially within the first support region. In order to be able to compensate for minor axis offsets or axial inclinations present in the drive system and to damp possibly occurring axial vibration excitations, it is proposed that the interaction region of the rotor arrangement with the first support region and / or the primary side of the Torsionsschwingungsdämpferanordnung connected to the second support portion via a respective elastic connection arrangement or connectable is. The or each elastic connection arrangement may for example comprise at least one leaf spring element.

A relief of the carrier assembly for torque transmission between the drive shaft and the following portion of the drive train can be achieved in that the primary side of Torsionsschwingsdämpferanordnung comprises a form-locking driving arrangement, which with a provided on the drive shaft or a fixedly connected or connectable component counter-interlocking Carrier assembly is in Drehkopplungseingriff or can be brought.

For example, it can be provided that the form-locking driving arrangement comprises at least one Axialausformung on the primary side of the Torsionsschwingungsdämpferanordnung, which can engage in a corresponding axial recess of the counter-positive locking driving arrangement. The or each axial recess may be a mounting screw receiving recess. Such fastening screws can serve, for example, to firmly connect the rotor assembly with the drive shaft.

In the drive system according to the invention, the secondary side of the Torsionsschwingungsdämpferanordnung may be formed for connection to a friction clutch or form part of the same, for example, a flywheel. Alternatively or additionally, the secondary side for coupling to other components of a drive train, preferably a transmission, a fluid coupling or the like may be formed.

In order to dissipate the torsional vibration energy as quickly and effectively as possible in the event of torsional vibrations which induce relative rotation between the primary side and the secondary side of the torsional vibration damper arrangement, it is proposed that the torsional vibration damper arrangement comprise at least one additional mass element which, upon relative rotation between the primary side and the secondary side is rotatable about an axis offset from the axis of rotation of the drive shaft and is in engagement with a formation engaging engagement on the primary side and / or the secondary side.

• a) Verbinden der Statoranordnung mit einer sich nicht mit der Antriebswelle drehenden Baugruppe und Verbinden der Rotoranordnung mit der Antriebswelle,
• b) danach Verbinden einer Primärseite der Torsionsschwingungsdämpferanordnung mit der Rotoranordnung.

The present invention further relates to a method for building a drive system, wherein the drive system comprises a drive shaft and an electric machine through which the drive shaft is driven for rotation and / or upon rotation of the drive shaft, electrical energy is recoverable, wherein the electric machine has a stator and a with the drive shaft rotatable rotor assembly, and a Torsionsschwingungsdämpferanordnung comprising the steps:

• a) connecting the stator assembly with a non-rotating with the drive shaft assembly and connecting the rotor assembly with the drive shaft,
• b) thereafter connecting a primary side of the Torsionsschwingungsdämpferanordnung with the rotor assembly.

In this method, it may be provided that step a) comprises connecting a carrier assembly of the rotor assembly to the drive shaft and that step b) comprises connecting the primary side of the torsional vibration damper assembly to the carrier assembly.

Further, the method may include a step c) of connecting a friction clutch or components thereof to a secondary side of the torsional vibration damper assembly.

The invention will be described in detail below with reference to the accompanying drawings with reference to preferred embodiments. It shows:

1 a partial longitudinal sectional view through a drive system according to the invention;

2 one of the 1 corresponding view of a modified embodiment of the drive system according to the invention;

3 another one 1 corresponding view of a further modification of the drive system according to the invention;

4 a view illustrating the coupling between the rotor assembly and the Torsionsschwingungsdämpferanordnung view of a further modification;

5 one of the 4 corresponding view of a further modification;

6 a further partial longitudinal sectional view of a modified embodiment of the drive system according to the invention.

This in 1 generally with 10 designated drive system is used in particular in motor vehicles application to direct the drive torque from a drive unit in a drive train or vice versa. The drive system 10 includes a drive shaft 12 , For example, the crankshaft of an internal combustion engine. The second functional group comprises the drive system 10 an electric machine 14 , and as a third functional group, the drive system according to the invention comprises a Torsionsschwingungsdämpferanordnung 16 , here in the form of a dual mass flywheel.

The electric machine 14 , which is an external rotor machine in the illustrated embodiment, includes a generally with 18 designated stator assembly with a stator 20 for example, on an engine block 22 o. The like. Is set and a cooling fluid channel arrangement 24 having. On the stator carrier 20 are stator coils 26 each with associated anchor or yoke 28 worn, with the coils 26 Power can be supplied via electrical lines, not shown, or can be dissipated from this stream. The stator 18 Surrounding radially outside is an interaction region 30 a rotor assembly 32 intended. The interaction area 30 includes a, for example, a plurality of ring-like metal plates 34 formed rotor yoke 36 (or another type of support), which on an inner circumferential surface in the circumferential direction successively a plurality of permanent magnets 38 wearing.

The rotor arrangement 32 further comprises a carrier element 40 , which is formed in its radially outer region substantially disc-like and in its radially inner region a pot-shaped axial depression 42 having. In the area of the bottom of this pot-like depression 42 is the carrier element 40 with an intermediate element 44 For example, by riveting, welding o. The like. Firmly connected. The intermediate element 44 is by a plurality of fastening screws 46 on the drive shaft 12 ie a shaft flange 48 the same, appropriate. It can be seen that at the of the drive shaft 12 facing away from the intermediate element 44 each fixing screw 46 associated with a receiving recess 50 in which the head 52 the respective fastening screw 46 can be sunk.

In its radially outer region is the carrier element 40 in a first carrying area 54 and a second support area 56 subdivided. In the first carrying area 54 is the interaction area 30 the rotor assembly 32 on the support element 40 , for example, by screwing or riveting, and in the second support area 56 is the Torsionsschwingungsdämpferanordnung in a detachable manner, for example by fastening screws 58 with the carrier element 40 from the interaction area 30 independently connected. For this purpose, the carrier element is in the radially outer region 40 divided into several arm-like sections, preferably in the circumferential direction alternately successively respective arm portions 60 that the first carrying area 54 form, and arm sections 62 that the second carrying area 56 form, are arranged. This results in a very good distribution over the interaction region 30 or the torsional vibration damper assembly 16 initiated forces.

To here for the coil heads 27 the stator coils 26 To create space, are the arm sections 60 starting from the disk-like carrier element 40 axially curved and thus bridge the coil heads 27 the stator coils 26 , It should be noted that the carrier element 40 is preferably made of non-ferromagnetic material, as in this way the induction of eddy currents in the support element 40 can be avoided.

The torsional vibration damper assembly 16 includes a primary page 64 attached to the support element 40 is coupled, as well as a secondary side 66 connected via a damper element arrangement 68 in torque transmission connection with the primary side 64 stands and with respect to the primary side 64 is rotatable. It can be seen that the primary side 64 a first cover plate element 70 having in its radially outer region by the screws 58 with the carrier element 40 to connect. A second cover disk element 72 the torsional vibration damper assembly 16 ie the primary side 64 , Has radially outward an axially extending portion 74 on and is with this, for example by laser welding, on the first cover disk element 70 established. With this axially extending section 74 forms the second cover disk element 72 a slideway for support elements 76 over which the damper elements 78 For example, substantially circumferentially extending damper springs 78 , on the primary side 64 ie the cover disk elements 70 . 72 on the one hand, and on the secondary side 66 ie a hub disc 80 the same, on the other hand can support. For this purpose, on the cover disk elements 70 . 72 respective formations may be provided which in the circumferential direction a stop for the support elements 76 form. The hub disc 80 has in a conventional manner a plurality of radially outwardly projecting arms 82 on, which also for supporting the support elements 76 can serve. It should be noted that not necessarily the support on the primary side 64 or the secondary side 66 must be done on such support elements; the damper elements 78 the damper element arrangement 68 can also be based directly on these components. Furthermore, it is of course possible that in the circumferential direction consecutively several such damper elements each adjoin one another and are supported on one another, possibly with intermediate storage of support elements.

The hub disc 80 is radially inward with a hub 84 the secondary side 66 for example, firmly connected by welding. An outer peripheral surface 86 the hub 84 is under interim storage of a radial bearing 88 For example, a plain bearing or a roller bearing, on a corresponding inner peripheral surface 90 of the intermediate element 44 radially supported. Further, with the hub 84 a connecting element 92 for example, by welding at 94 firmly connected, in its radially outer region of a flywheel or flywheel 96 carries for a friction clutch. At this flywheel 96 can be screwed in the radially outer region in a conventional manner, a pressure plate assembly of the friction clutch. It can be seen here that the flywheel 96 radially terminates within that range in which the Torsionsschwingungsdämpferanordnung 16 with the carrier element 40 is screwed. It may thus be the connection between the Torsionsschwingungsdämpferanordnung 16 and the carrier element 40 be made and solved even when the connecting element 92 once firmly to the hub 84 is connected.

It should be noted that instead of the connection to a flywheel or a friction clutch here also a direct connection to a drive train, such as a direct connection to a transmission input shaft, possibly with the interposition of a torque converter or a fluid coupling, is possible.

In the radially inner region of the first cover disk element 70 are circumferentially consecutive multiple axial formations 98 formed, on each of which a planetary gear 100 is rotatably supported. The planet wheel 100 meshes with its teeth 101 with one at the hub 84 provided toothing 102 , With relative rotation between the primary side 64 and the secondary side 66 thus become the cover disk element 70 the primary side 64 worn planet gears 100 set in rotation, so that in addition vibration excitation energy in the rotational movement of the planetary gears 100 is implemented. It should also be noted that in the of the two cover disk elements 70 . 72 enclosed space 100 In general, a viscous medium, such as a damping fat o. The like., Is arranged, the relative rotation between the primary side 64 and the secondary side 66 on the one hand through the hub disc 80 with her arms 82 and the damper elements 78 must be moved in this viscous medium and on the other by the rotating planet gears 100 must be moved in this viscous medium. This also leads to a reduction of the vibration energy. To the exit of the viscous medium from this chamber 104 To prevent is at the drive shaft 12 facing axial side of the hub disc 80 a Gleitlagerungs- and sealing element 106 provided, on the one hand, the axial support of the entire secondary side 66 on the primary side 64 provides and on the other hand, a tight closure of the room 104 forms. On the other axial side is an example of sheet metal formed ring-like sealing element 108 provided, that during welding of the connecting element 92 with the hub 94 in this area 94 miteingeschweißt and in its other end at the radially inner end of the cover disk element 70 engages and thus creates there a fluid-tight seal radially within the planet gears.

Furthermore, one recognizes in the 1 that on the primary side 64 ie in the second cover disk element 72 the same, a plurality of axially extending formations 110 for example, by deep drawing or embossing in the manufacture of this cover plate element 72 are formed from a sheet metal blank. These Axialausformungen are shaped and positioned so that they are in attachment of the Torsionsschwingungsdämpferanordnung 16 on the carrier element 40 in the receiving recesses 50 in the intermediate element 40 can engage, which are so deep for this purpose that axially adjacent to the heads 52 the fixing screws 46 still receiving space on these Axialausformungen 110 is created. In this way, a rotationally positive coupling acting in the circumferential direction between the primary side is also used here 64 the torsional vibration damper assembly 16 and the rotor assembly 32 ie with the carrier element 40 firmly connected intermediate element 44 , created. The connection between the rotor assembly 32 and the torsional vibration damper assembly 16 in the radially outer region, ie in the second support region 56 , can thus be relieved.

The foregoing with reference to the 1 described embodiment of a drive system with electric machine, which can be used both for starting a drive unit as well as for feeding electrical energy in the manner of a generator in a vehicle electrical system or an accumulator o. The like., Offers a variety of advantages. On the one hand is due to the axial overlap of the Torsionsschwingungsdämpferanordnung 16 with the electric machine 14 created an axially kurzbauende arrangement, which is also supported by the fact that the primary side 64 the torsional vibration damper assembly 16 in the cup-shaped carrier element 40 the rotor assembly 32 is included. The possibility of the torsional vibration damper assembly 16 regardless of an already finished assembled state of the electric machine 14 to the rotor assembly 32 To be able to connect or decouple from this, simplifies the structure of the entire drive system and also makes it possible to produce the various functional groups with respect to the functions to be fulfilled by these functions optimized design. The axially short design is also supported by the fact that the planet gears 100 radially within the damper element assembly 68 lie and thus can overlap with this also axially.

In the construction of such a drive system 10 can proceed as follows: It is first the stator assembly 18 with the stator carrier 20 on the engine block o. The like. Set. Subsequently, a preassembled assembly is formed of intermediate element 44 , Carrier element 40 and interaction area 30 ie the pre-assembled rotor assembly 32 , axially to the drive shaft 12 introduced and with the mounting screws 46 set at this. Here by one on the drive shaft 12 provided projection 112 a centering instead. Subsequently, the already prefabricated Torsionsschwingungsdämpferanordnung 16 moved axially and with her hub 84 with intermediate arrangement of the storage arrangement 88 in the intermediate element 44 introduced and thus radially centered with respect to this. It can be seen that a radial centering between the Torsionsschwingungsdämpferanordnung 16 and the intermediate element 44 in the radially inner region of the cover disk element 72 takes place, where this with an example axially flanged end portion on a cylindrical outer peripheral surface portion of the intermediate element 44 is applied. This section also carries the seal and thrust bearing element 106 , At the same time, the axial formations also occur 110 in the associated axial recesses 50 one. In this state, in which then the cover disk element 70 radially outward on the carrier element 40 axially rests, then the screws 58 through the cover disk element 70 through and into the arm sections 62 of the second carrying area 56 screwed in and tightened. Already before or after this attachment of the Torsionsschwingungsdämpferanordnung 16 on the carrier element 40 can on the flywheel 96 an entire pressure plate assembly are mounted with intermediate storage of a clutch disc. Since, as already mentioned above, a group and functional group-wise separation of the rotor assembly 32 is provided by the Torsionsschwingungsdämpferanordnung, the Torsionsschwingungsdämpferanordnung 16 , as previously described, even before its assembly with the remaining drive system 10 composing what the process of assembling the Torsionsschwingungsdämpferanordnung 16 considerably simplified, since this can be done in a suitable environment and in particular because the various welding steps can thus be carried out more easily.

It should be noted that, for example, in the outer peripheral region of the cover disk element 70 or the carrier element 40 successively a plurality of tooth-like projections can be formed, which radially opposite an electromagnetic pickup can be arranged so as to detect the rotational speed of the drive system. However, it is also possible on the support element 44 to provide such a projection arrangement or for this purpose a separate element, for example by means of the screws 58 to install. It should also be noted that various components of the Torsionsschwingungsdämpferanordnung 16 , For example, the cover disk element 70 and the cover disk element 72 and preferably also the carrier element 40 , can be formed from a sheet metal blank in a deep-drawing process. The hub 84 the secondary side may for example be designed as Kaltfließpreßteil, which on the one hand the sliding bearing for the bearing 88 forms and in which at the same time the gearing 102 is formed.

The 2 shows a modification of the in 1 illustrated embodiment variant, in particular in the region of the support element 40 , In the following, only the essential structural differences are discussed. It can be seen that the carrier element 40 here in its radially outer region a plurality of axial, in the circumferential direction successive depressions 114 has, in which respective radially outwardly extending arm portions 116 the cover disk element 70 dive, ie axially engage. Radially outward, the support element 40 again the first carrying area 54 for attaching the interaction region 30 the rotor assembly 32 on and axially offset and in the circumferential direction, for example, alternately arranged the arm portions 62 of the second carrying area 56 , Here again in the circumferential direction separate arm sections 60 . 62 However, these arm sections can also pass directly into each other in the manner of a wave pattern.

By the axial immersion of the cover disk element 70 ie the primary side 64 the torsional vibration damper assembly 16 , in the carrier element 40 can be saved further axial space and can also in this axially overlapping region a form-fitting acting in the circumferential direction rotary coupling between the primary side 64 the torsional vibration damper assembly 16 and the carrier element 40 the rotor assembly 32 be created. Furthermore, it can be seen that here the cover disk element 72 has no Axialausformungen, as with reference to the 1 has been described, although these could also be provided here. However, since already radially outward in the region of the first cover disk element 70 a coupling which acts in a form-fitting manner in the circumferential direction is already provided for a stable rotational coupling.

A further modification of the drive system according to the invention 10 is in 3 shown. There, too, there is a difference essentially in the design of the carrier element 40 or the coupling of the Torsionsschwingungsdämpferanordnung 16 at this. It can be seen that here the first carrying area 54 still lies radially outward and there the interaction area 30 the rotor assembly 32 with the carrier element 40 connected is. The carrier element 40 extends there radially inward and is for surrounding the coil heads of the stator coils 28 slightly curved. Radial inside the stator coils 28 or the coil heads thereof are on the support element 40 several tongue-like arm sections 62 axially bent so that they pass through the screws 58 with the now radially shorter built cover disk element 70 the torsional vibration damper assembly 16 ie the primary side 64 the same can be connected. To access the screws 58 to gain are in the flywheel 96 or another drive flange or the like provided for connection to a drive train 118 formed, through which a fastening tool to the screws 58 can be performed, or the screws 58 can be introduced. This embodiment also allows an axially short construction, in which in particular when the arm portions 62 by, for example, U-shaped cutouts in the carrier element 40 and corresponding axial bending of the lobes thus created are generated, again a rotational coupling with positive engagement between the support element 40 and radially outwardly projecting arm portions of the cover disk member 70 can be created. Otherwise, this embodiment also corresponds in terms of its mode of operation and in terms of its construction, in particular also with regard to the procedure when assembling the same, according to the embodiment 1 and 2 ,

In the 4 and 5 are other ways of coupling the Torsionsschwingungsdämpferanordnung 16 ie the primary side 64 the same, with the rotor assembly 32 shown. One recognizes in 4 in that on the carrier element 40 in the second carrying area 56 by riveting a plurality of radially and / or circumferentially extending leaf spring elements 120 riveted. In the other end region are the leaf spring elements 120 on the cover disk element 70 through the fixing screws 58 set, which now with nuts 122 are firmly screwed, as in the leaf spring elements 120 the introduction of an internal thread is not possible, which is however possible in the embodiment variants described above for the carrier element. By using such circumferentially successively arranged leaf spring elements is a more flexible Coupling between the Torsionsschwingungsdampferanordnung and the carrier element 40 the rotor assembly 32 created, so that in rotary operation small wobbling movements between these modules can occur, which can be caused by slight axial offsets and Achsneigungen.

In the embodiment according to 5 is the carrier element 40 from two segments 124 . 126 formed, with the segment 124 As described above, to the intermediate element 40 is attached or is and the segment 126 radially outside in the first carrying area 54 the interaction area 30 the rotor assembly 32 wearing. The two segments 24 . 26 are in turn by several leaf spring elements 128 or a continuous elastic ring connected, in which case the connection to the respective segments 124 . 126 can be done for example by riveting. Furthermore, in the second support area 56 on the segment 124 again a plurality of leaf spring elements 120 attached by riveting, for example, in their other end again by the screws 58 and the nuts 122 with the cover disk element 70 the primary side 64 the torsional vibration damper assembly 16 are connected. In this way, both the Torsionsschwingungsdämpferanordnung 16 towards and to the interaction area 30 the rotor assembly 32 towards a flexible coupling are created. One recognizes in 5 in that the leaf spring elements 128 and the leaf spring elements 120 with the segment 124 the carrier element 40 are connected by the same rivet or other fasteners.

By the present invention, the structure of a drive system is provided, in which the integration of the various functional groups electric machine and Torsionsschwingungsdämpferanordnung takes place such that a simple and reliable construction, an axially and radially kleinbauende construction is obtained. Although the structure of the electric machine as external rotor machine, as shown in the figures, makes a special contribution here, the use of a carrier element, as described above, in principle also possible in conjunction with an internal rotor machine, in which ultimately the radial positioning between the stator assembly and rotor assembly is reversed. In this case, the support element would be formed radially shorter, since it would have to extend only to the now radially further positioned inside interaction region of the rotor. It should also be noted that, of course, the electric machine can be designed as a three-phase asynchronous machine or as a three-phase synchronous machine. However, the use of an electric machine with a permanent magnetically excited rotor arrangement is preferred.

Previously, the Torsionsschwingungsdämpferanordnung has been described such that it has a plurality of springs or sets of springs as damper elements, in which the springs can also be staggered radially into one another and / or circumferentially several springs, possibly with different spring constants, can be arranged. In principle, however, it is also possible to use centrifugal force coupling elements as damper elements, which are articulated on the one hand and on the secondary side on the other hand by centrifugal force and generate a relative rotation between the primary side and the secondary side counteracting restoring or damping force. Also, a friction device for Ereugen one of the rotation counteracting friction force can be provided.

Furthermore, the torsional vibration damper may be formed such that the planet gears are not rotatable on the primary side and mesh with a toothing of the secondary side, but that the planetary gears on the secondary side, such as the hub disc, are rotatably supported and mesh with a then provided on the primary side teeth ,

It is also possible to arrange the planet wheels floating, d. H. store neither on the primary side nor on the secondary side, but provide both on the primary side and on the secondary side in the manner of a ring gear or a sun gear each have a toothing, so that when relative rotation between the primary side and the secondary side, the planetary gears not rotate only one axis, but move along this axis around the axis of rotation of the whole system.

Furthermore, it should be noted that in the context of the present invention, the support member can be understood together with the intermediate element as a carrier assembly of the rotor assembly. In principle, however, the carrier element can also be fixed to the drive shaft without the interposition of the intermediate element. Such an embodiment is in 6 shown. It can be seen here that the carrier element 40 is formed axially in its radially inner region and thus the stator assembly 18 radially bridged inside. With a flange section 150 protrudes the carrier element 40 to the crankshaft flange 48 close and is through the mounting screws 46 fixed on this. Together with the carrier element 40 is through the mounting screws 46 a support element 152 at the crankshaft flange 48 screwed on, now the surface 90 having, at which intermediate storage of the radial bearing 88 the secondary side 66 is stored. As the support element 152 with the carrier element 40 firmly connected and the carrier element 40 with the primary side 64 , such as in 1 shown, is firmly connected, here is also a firm support of the secondary side 66 on the primary side 64 obtained. It should be noted that of course the support 152 during the deep drawing process integrally with the carrier element 40 or its flange portion 150 could be formed. Otherwise corresponds to in 6 illustrated embodiment with respect to their operation or with respect to the structure of the embodiments described above.

Claims (21)

Drive system, in particular for a motor vehicle, comprising a drive shaft ( 12 ) and an electric machine ( 35 ), through which the drive shaft ( 12 ) is driven for rotation and / or upon rotation of the drive shaft ( 12 ) electrical energy is obtainable, wherein the electric machine ( 14 ) a stator arrangement ( 18 ) and one with the drive shaft ( 12 ) rotatable rotor assembly ( 32 ), further comprising a Torsionsschwingungsdämpferanordnung ( 16 ), which at least one damper element ( 78 ), which between a primary side ( 64 ) and a secondary side ( 66 ) of the torsional vibration damper arrangement ( 16 ) for allowing relative rotation, the rotor assembly ( 32 ) comprises a carrier arrangement ( 40 ), which with the drive shaft ( 12 ) rotatably connected or connected and which in a first support area ( 54 ) an interaction region ( 30 ) of the rotor assembly ( 32 ) and in a second carrying area ( 56 ) with a primary page ( 64 ) of the torsional vibration damper arrangement ( 16 ) is rotatably connected or connected, characterized in that the Torsionsschwingungsdämpferanordnung ( 16 ) independent of a final assembled state of the electric machine ( 14 ) to the rotor assembly ( 32 ) can be coupled and decoupled. Drive system according to Claim 1, characterized in that the electric machine ( 14 ) an external rotor machine is with a radially outside of the stator assembly ( 18 ) arranged interaction area ( 30 ) of the rotor assembly ( 32 ). Drive system according to Claim 1 or 2, characterized in that the torsional vibration damper arrangement ( 16 ) at least partially radially within the stator assembly ( 18 ) is arranged. Drive system according to one of Claims 1 to 3, characterized in that the torsional vibration damper arrangement ( 16 ) at least partially axially with the stator assembly ( 18 ) overlaps. Drive system according to one of Claims 1 to 4, characterized in that the carrier arrangement ( 40 ) at least partially (at 42 ) is pot-shaped and that the Torsionsschwingungsdämpferanordnung ( 16 ) at least partially axially in the pot-like carrier arrangement ( 40 protrudes. Drive system according to one of Claims 1 to 5, characterized in that the primary side ( 64 ) of the torsional vibration damper arrangement ( 16 ) a first cover disk element ( 70 ) and a second cover disk element ( 72 ), which with the first cover disk element ( 70 ) is firmly connected, and that at least the first cover plate element ( 70 ) with the carrier arrangement ( 40 ) in the second carrying area ( 56 ) is connected or connectable. Drive system according to Claim 6, characterized in that the 40 ) connected or connectable cover disk element ( 70 ) in or near the second support area ( 56 ) with the carrier assembly ( 40 ) at least partially overlapped axially. Drive system according to one of claims 1 to 7, characterized in that the carrier arrangement ( 40 ) in their first carrying area ( 54 ) a plurality of circumferentially successive first support portions ( 60 ) and in its second carrying area ( 56 ) a plurality of circumferentially successive second support portions ( 62 ). Drive system according to claim 8, characterized in that between at least two first support sections ( 60 ) a second support section ( 62 ) is arranged. Drive system according to one of claims 1 to 9, characterized in that the first carrying area ( 54 ) in a radially outer region of the carrier arrangement ( 40 ) is arranged. Drive system according to Claim 10, characterized in that the second carrying area ( 56 ) radially within the first support area ( 54 ) is arranged. Drive system according to one of Claims 1 to 11, characterized in that the interaction region ( 30 ) of the rotor assembly ( 32 ) with the first carrying area ( 54 ) or / and the primary page ( 64 ) of the torsional vibration damper arrangement ( 16 ) with the second support area ( 56 ) via a respective elastic Connection arrangement ( 120 . 128 ) is connected or connectable. Drive system according to claim 12, characterized in that the elastic connection arrangement ( 120 . 128 ) at least one leaf spring element ( 120 . 128 ). Drive system according to one of Claims 1 to 13, characterized in that the primary side ( 64 ) of the torsional vibration damper arrangement ( 16 ) a positive locking entrainment arrangement ( 110 ), which with one on the drive shaft ( 12 ) or a component connected or connectable thereto ( 44 ) provided counter-positive-entrainment arrangement ( 50 ) is in Drehkopplungseingriff or can be brought. Drive system according to claim 14, characterized in that the positive-locking entrainment arrangement ( 110 ) at least one axial formation ( 110 ) on the primary side ( 64 ) of the torsional vibration damper assembly 16 ), which in a corresponding axial recess ( 50 ) of the counter-form-locking take-along arrangement ( 50 ) can intervene. Drive system according to claim 15, characterized in that the axial recess ( 50 ) a mounting screw receiving recess ( 50 ). Drive system according to one of Claims 1 to 16, characterized in that the secondary side ( 66 ) of the torsional vibration damper arrangement ( 16 ) is designed for connection to a friction clutch or forms part of it or / and for coupling to other components of a drive train, preferably a transmission, a fluid coupling or the like, is formed. Drive system according to one of claims 1 to 17, characterized in that the torsional vibration damper arrangement ( 16 ) at least one additional mass element ( 100 ), which in relative rotation between the primary side ( 64 ) and secondary side ( 66 ) about a to the axis of rotation (A) of the drive shaft ( 12 ) offset axis is rotatable and with an engagement formation ( 101 ) in engagement with a counter-engagement formation ( 102 ) on the primary side ( 64 ) and / or the secondary side ( 66 ) stands. Method for constructing a drive system, wherein the drive system ( 10 ) a drive shaft ( 12 ) and an electric machine ( 35 ), by which the drive shaft ( 12 ) is driven for rotation and / or upon rotation of the drive shaft ( 12 ) electrical energy is obtainable, wherein the electric machine ( 14 ) a stator arrangement ( 18 ) and one with the drive shaft ( 12 ) rotatable rotor assembly ( 32 ), and a Torsionsschwingungsdämpferanordnung ( 16 ), in particular for constructing a drive system ( 10 ) according to one of claims 1 to 18, comprising the steps of: a) connecting the stator arrangement ( 18 ) with a not with the drive shaft ( 12 ) rotating assembly ( 22 ) and connecting the rotor assembly ( 32 ) with the drive shaft ( 12 ), b) then connecting a primary page ( 64 ) of the torsional vibration damper arrangement ( 16 ) with the rotor assembly ( 32 ). Method according to Claim 19, characterized in that the step a) involves connecting a carrier arrangement ( 40 ) of the rotor assembly ( 32 ) with the drive shaft ( 12 ) and that step b) connecting the primary side ( 64 ) of the torsional vibration damper arrangement ( 16 ) with the carrier arrangement ( 40 ). The method of claim 19 or 20, further comprising a step c) for connecting a friction clutch or components thereof with a secondary side ( 66 ) of the torsional vibration damper arrangement ( 16 ).

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