drive unit

Abstract

Drive unit (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300) in particular for a hybrid powertrain with an internal combustion engine (101, 601, 701) with a first housing (111, 511, 611, 711, 1111, 1211, 1311) and a crankshaft (107, 207, 307, 407, 507, 607, 707, 807, 907, 1007, 1107, 1207, 1307) and an electric machine (104, 204, 304, 804, 904, 1004, 1104, 1204, 1304) with a second housing (110, 210, 310, 410, 510, 610, 710, 1110, 1210, 1310) and a rotor (117, 217, 317, 417, 617, 817, 917), wherein the two housings (110, 111, 210, 310, 410, 510, 511, 610, 611, 710, 711, 1110, 1111, 1210, 1211, 1310, 1311) are fixed to each other, and a crankshaft (107, 207, 307, 407, 507, 607, 707, 807, 907, 1007, 1107, 1207, 1307) and rotor (117, 217, 317, 417, 617, 817, 917) are connected to each other in a rotationally locked manner, wherein a flywheel (102, 202, 307, 407, 507, 607, 707, 807, 907, 1007, 1107, 1207, 1307) is centered on the crankshaft (107, 207, 307, 407, 507, 607, 707, 807, 907, 1007, 1107, 1207, 1307),702, 802, 902, 1002) is attached and an input part (112, 212, 312, 412, 812, 912, 1012, 1112, 1312) of a unit (103, 203, 303, 804, 904, 1004, 1104, 1204, 1304) formed from the electric machine (104, 204, 304, 804, 904, 1004, 1104, 1204, 1304) and a torsional vibration damper (105, 205, 305, 805, 905, 1005, 1105, 1205, 1305) is mounted in a rotationally fixed manner. is characterized in that the flywheel (102, 202, 1002) is rotationally connected to the crankshaft (107, 207, 1007, 1207) by means of fastening screws (106, 206, 1006) arranged around the circumference and the input part (112, 212, 1012, 1212) is connected to the crankshaft (107, 207, 1007, 1207) by means of a central screw (115, 215, 1015).

Description

[0001] The invention relates to a drive unit, in particular for a hybrid drive train, comprising an internal combustion engine with a first housing and a crankshaft and an electric machine with a second housing and a rotor, wherein the two housings are rigidly connected to each other and the crankshaft and rotor are rotationally connected to each other.

[0002] A drive unit consisting of an internal combustion engine and an electric motor, whose crankshaft and rotor are coupled, is known, for example, from German patent application DE 100 25 853 A1 for a hybrid drive train. In this unit, the internal combustion engine and the electric motor can each provide drive torque separately or jointly for propelling a motor vehicle; the electric motor can start the internal combustion engine and the electric motor can recuperate energy during deceleration.

[0003] Further examples of prior art refer to DE 100 05 996 A1, DE 102 40 677 A1 and DE 44 09 694 A1.

[0004] The object of the invention is to propose a drive unit of the generic type with a torsionally vibration-isolated interface to downstream components to be driven, for example, of a hybrid drive train. In particular, the object of the invention is to further develop a connection between the internal combustion engine and the electric motor.

[0005] The problem is solved by the subject matter of claim 1. The dependent claims describe advantageous embodiments of the subject matter of claim 1.

[0006] The proposed drive unit is specifically designed for use in a hybrid powertrain to provide drive torque. In this configuration, the internal combustion engine and / or the electric motor can provide the corresponding drive torque. The internal combustion engine can be started by the electric motor, and the electric motor can recuperate the vehicle's kinetic energy into electrical energy during coasting, which is then stored in a battery or accumulator. For this purpose, the internal combustion engine can, for example, be switched off and, if necessary, its torque can be reduced or eliminated by automated valves or similar devices. To decouple the drive unit from the rest of the hybrid powertrain, a clutch, such as a friction clutch, can be installed downstream of the drive unit.

[0007] The internal combustion engine comprises a first housing and a crankshaft, while the electric motor comprises a second housing that rigidly accommodates a stator and a rotor. The two housings are rigidly connected to one another, for example by bolting them together, and preferably centered on each other, so that the crankshaft, the stator, and, maintaining a predetermined air gap, the rotor are arranged coaxially with each other, at least within a predetermined tolerance. The crankshaft and the rotor are connected to each other by a direct or indirect rotational connection.

[0008] To create a torsionally locked connection between the crankshaft and the rotor, a torsionally isolated interface between the drive unit and subsequent components, such as drivetrain components of a hybrid powertrain, and to facilitate the simple joining of the internal combustion engine and the drive unit, a flywheel is mounted centrally on the crankshaft, and an input component of a unit consisting of the electric motor and a torsional vibration damper is fixedly mounted. The flywheel, by means of its moment of inertia, dampens the torsional vibrations of the crankshaft, while the torsional vibration damper provides torsional vibration damping. The moment of inertia of the rotor, and optionally an active control system for the electric motor, further contribute to torsional vibration isolation. The torsional vibration damper can be arranged radially within the rotor.Furthermore, a speed-adaptive torsional vibration damper, for example a centrifugal pendulum, can be arranged upstream or downstream of the torsional vibration damper and / or upstream or downstream of the rotor, and may optionally be located radially within the rotor or axially adjacent to it. Additionally, a wet or dry friction clutch can be arranged downstream of the drive unit and may optionally be located radially within the rotor in its axial installation space or axially spaced from it. The torsional vibration damper has a circumferentially acting spring assembly between its damper inlet section and its damper outlet section, which includes at least one damper stage with long, curved springs and / or short helical compression springs distributed around the circumference.Alternatively, spring assemblies with several nested helical compression springs can be provided.

[0009] The flywheel can be formed as a flywheel consisting of a ring part, a ring disc part, or ring segments distributed around the circumference, which are arranged on one or both sides of a thin disc or ring disc part.

[0010] The flywheel is attached to the crankshaft by means of mounting screws distributed around its circumference, for example, arranged on a predetermined pitch circle. The input part of the assembly is attached to the flywheel by means of a central screw. For example, the flywheel can have an axially extended projection centered on a central recess with an internal thread, with the input part centered on the central screw and axially clamped between the flywheel and the central screw. The applied torque can be transmitted by means of a positive fit or by the clamping action between the flywheel and the input part. Alternatively, the flywheel and the input part can be attached to the crankshaft by means of the central screw. In this case, the inner circumference of the rotor can be centered on the flywheel.

[0011] Alternatively, the flywheel can be attached to the crankshaft by means of the central screw and the input part can be attached to the flywheel, for example by means of fastening screws arranged on a pitch circle, and centered relative to the flywheel.

[0012] The input part of the assembly, in particular a connecting part attached to the crankshaft or flywheel and arranged with the rotor, can be axially elastic. For example, a drive plate can be attached to the crankshaft by means of the central bolt or by means of fastening bolts arranged on a pitch circle. A so-called flexplate, formed from an axially elastic sheet metal part, several adjacent spring washers, or leaf springs or leaf spring assemblies distributed around the circumference, is connected to or rests against this drive plate and is radially attached to the outside of the rotor of the electric machine. For example, the drive plate can be part of the separately designed flywheel.Alternatively, the axially elastic input part can be connected to the crankshaft directly or via the driven plate, with the flywheel being radially outside an axially elastic area of ​​the input part, for example, radially outside a flexplate, perhaps in a ring-like configuration. This flywheel can, for example, be arranged axially to the rotor or radially overlapping the rotor and / or stator of the electric machine.

[0013] In a first group of embodiments of the proposed drive unit, the rotor, or an axially fixed or axially elastic disk section connected to it, can form the input part of the assembly, and the torsional vibration damper can be located downstream of the rotor. Here, the input part, such as a disk section rotationally connected to the crankshaft or flywheel, and the damper input part of the torsional vibration damper can be designed as a single unit or as separate parts connected to each other. The damper output part simultaneously forms the output part of the assembly and is rotationally connected, for example, by means of an output hub, to a shaft or stub shaft of a downstream component of the hybrid drivetrain, such as a disconnect clutch, a gearbox, or the like.

[0014] In a second group of embodiments of the proposed drive unit, the torsional vibration damper is positioned upstream of the electric machine's rotor, and the damper's inlet section, either as a single unit or as separate components in conjunction with a disk section connected to the rotor, forms the inlet section of the assembly. The damper's outlet section is rotationally connected to the rotor. For example, the damper outlet section, or a disk section connected to the rotor and the damper outlet section, can have an outlet hub for a rotationally locked connection of the assembly to the subsequent part of the hybrid drive train.

[0015] Depending on the sealing and cooling concept of the internal combustion engine and the assembly with the electric motor and torsional vibration damper, different seals may be provided between the housings of the internal combustion engine and the electric motor, the crankshaft and the first housing, and / or the second housing and the subsequent hybrid drivetrain, as well as the first housing. For example, the sealing concept of the internal combustion engine may be independent of the assembly, and a seal may be provided between the crankshaft and the first housing. Alternatively or additionally, the assembly may be sealed externally and cooled and lubricated separately, or it may operate dry. In this case, a separate external seal may be omitted.Alternatively, the assembly, together with a downstream gearbox, can optionally be cooled and lubricated by means of an intermediate disconnect clutch, thus creating a seal between the second housing and a connection to a gearbox housing. The second housing and the gearbox housing can be formed as a single unit.

[0016] The invention is described in the following: Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12 to Fig. The 13 illustrated examples are explained in more detail below. These show: Fig. 1 the upper part of a drive unit arranged around a rotary axis, shown schematically in section, Fig. 2 the upper part of a unit arranged around a pivot axis opposite the drive unit Fig. 1 modified drive unit in schematic sectional view, Fig. 3 the upper part of a unit arranged around a pivot axis opposite the drive units of the Fig. 1 and Fig. 2 modified drive units in schematic sectional view with axially elastic input part, Fig. 4 the upper part of a unit arranged around a pivot axis opposite the drive units of the Fig. 1, Fig. 2 to Fig. 3 modified drive unit in schematic sectional view with axially elastic input part, Fig. 5 the upper part of a unit arranged around a pivot axis opposite the drive units of the Fig. 1, Fig. 2, Fig. 3 to Fig. 4 modified drive unit in schematic sectional view with axially elastic input part, Fig. 6 the upper part of a unit arranged around a pivot axis opposite the drive units of the Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. 5 modified drive unit in schematic sectional view, Fig. 7 the upper part of a unit arranged around a pivot axis opposite the drive units of the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. 6 modified drive unit in schematic sectional view, Fig. 8 the upper part of a unit arranged around a pivot axis opposite the drive units of the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. 7 modified drive unit in schematic sectional view with torsional vibration damper upstream of the rotor, Fig. 9 the upper part of a unit arranged around a pivot axis opposite the drive units of the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 modified drive unit in schematic sectional view with torsional vibration damper upstream of the rotor, Fig. 10 the upper part of a unit arranged around a pivot axis opposite the drive units of the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 to Fig. 9 modified drive unit in schematic sectional view with torsional vibration damper upstream of the rotor, Fig. 11 the upper part of a unit arranged around a pivot axis, opposite the drive units of the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 to Fig. 10 modified drive unit in schematic sectional view with torsional vibration damper upstream of the rotor, Fig. 12 the upper part of a unit arranged around a pivot axis opposite the drive units of the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10 to Fig. 11 modified drive unit in schematic sectional view with torsional vibration damper upstream of the rotor and Fig. 13 the upper part of a unit arranged around a pivot axis, opposite the drive units of the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11 to Fig. 12 modified drive unit in schematic sectional view with torsional vibration damper upstream of the rotor.

[0017] The Fig. Figure 1 shows the upper part of the drive unit 100 arranged around the axis of rotation d with the internal combustion engine 101, the flywheel 102 and the assembly 103 formed from the electric machine 104 and the torsional vibration damper 105.

[0018] The flywheel 102 is designed as a fly disc and is bolted to the crankshaft 107 of the internal combustion engine 101 by means of fastening screws 106 arranged around its circumference on a predetermined pitch circle. The flywheel 102 has an axially extended projection 109 that engages in the central opening 108 of the crankshaft 107 and centers the flywheel 102 relative to the crankshaft 107.

[0019] The housing 110 of the assembly 103 is radially connected to the housing 111 of the internal combustion engine by means of screws (not shown) and centered on it, outside the flywheel 102. The input part 112 of the assembly 103 contains the rigid disk part 114, which is radially connected to the rotor 117 of the electric machine 104. The disk part 114 is axially preloaded radially inside against the flywheel 102 by means of the central screw 115 and may also have a positive locking connection with it. The central screw 115 is screwed into the internal thread 116 of the flywheel 102.

[0020] To maintain a specified air gap 113 between the rotor 117 and the stator 118 connected to the housing 110, the disk part 114 is centered relative to the flywheel 102 by means of the central screw 115 and thus via the tolerance chain of the flywheel 102 via the crankshaft 107 to the housing 111 relative to the stator 118.

[0021] The inlet part 112, as shown here, receives the damper inlet part 119 of the torsional vibration damper 105, which is connected downstream of the electric motor 104, on the disc part 114 in a rotationally fixed manner. The damper outlet part 120 is connected to the outlet hub 121. The spring assembly 122 is arranged circumferentially between the damper inlet part 119 and the damper outlet part 120 and is acted upon by them circumferentially. The spring assembly 122 contains the helical compression springs 123, for example, pre-bent arc springs to their insertion diameter, which are distributed around the circumference.

[0022] In the illustrated embodiment of the drive unit 100, the internal combustion engine 101 is not sealed against the crankshaft 107. However, the assembly 103 is sealed externally by means of the inner circumference of the housing section 125, located axially between the flywheel 102 and the disc part 114, and the shoulder 126 of the disc part 114, by means of the seal 127 on the one hand, and by means of the seal 129 located between the inner circumference of the flange part 128 and the output hub 121 on the other. The output hub 121 is rotatably mounted 130 on the housing 110 by means of an axial fixed bearing, for example, a deep groove ball bearing.

[0023] The assembly of the component 103 onto the housing 111 is effected by connecting the housings 110 and 111 radially outside the flywheel 102 and by screwing the central screw 115 to the flywheel 102, which is pre-mounted on the crankshaft 107. The connection of the drive unit 100 to the subsequent part of the hybrid drive train is effected by engaging the toothing between the output hub 121 and a complementarily toothed part of a shaft or shaft stub. Fig. Figure 2 shows the upper part of the drive unit 100 arranged around the axis of rotation d. Fig. 1. Similar drive unit 200 in a schematic sectional view. In contrast to drive unit 100, drive unit 200 has the axially flexible input part 212 of assembly 203, for example, to compensate for axial, wobble, and / or shield vibrations of the crankshaft 207 of the internal combustion engine (not shown in detail). For this purpose, the rotor 217 of the electric machine 204 is connected by means of the drive disc 231, which is centered on the flywheel 202 at its inner circumference by means of the centering collar 232 and axially preloaded against the flywheel 202 by means of the central screw 215, which is screwed to the flywheel 202, and optionally rotationally connected to it. The flywheel 202 is screwed to the crankshaft 207 by means of the fastening screws 206.

[0024] The drive plate 231 is fixedly mounted to the drive plate 231 by means of the fastening screws 234, with the axially flexible connecting part 233 being rigidly connected radially to the rotor 217. In this way, the rotor 217 is axially elastically and rotationally fixedly coupled to the crankshaft 207. The bearing 230 of the rotor 217 relative to the housing 210 of the electric machine 204 is achieved by means of the radially inwardly extending flange part 236.

[0025] The damper inlet part 219 of the torsional vibration damper 205 is connected to the axially fixed area of ​​the disc part 214. Axial vibrations transmitted into the torsional vibration damper 205 are thereby compensated between the damper inlet part 219, the damper outlet part 220 and the spring assembly 222.

[0026] The Fig. Figure 3 shows a schematic sectional view of the upper part of the drive unit 300 arranged around the axis of rotation d. In contrast to the drive unit 200 of the Fig. 2 The flywheel 302 of the drive unit 300 is ring-shaped and is connected downstream of the axially flexible input part 312 of the assembly 303 and is arranged within the housing 310 of the electric machine 304 or the assembly 303. For this purpose, the driven disc 331 is attached to the crankshaft 307 of the internal combustion engine (not shown) by means of the central screw 315, which is optionally axially pre-tensioned by means of a positive locking connection. The disc part 314 is connected to the axially elastic connecting part 333 on the driven disc 331 by means of the fastening screws 334. Radially outside the connecting part 333, the ring-shaped flywheel 302 is connected to the rotor 317 of the electric machine 304 and the disc part 314, for example by means of the rivet 335.

[0027] The damper inlet part 319 of the torsional vibration damper 305 is connected to the flange part 336, which is connected to the rotor 317, on the side facing away from the connection of the rotor 317 to the disc part 314. The flange part 336, and thus the rotor 317, is rotatably mounted on the housing 310 by means of the bearing 330, for example, as shown here, by means of the axial fixed bearing, so that any axial vibrations acting on the crankshaft 307 are damped within the connecting part 333.

[0028] The Fig. Figure 4 shows a schematic sectional view of the upper part of the drive unit 400 arranged around the axis of rotation d. In contrast to the drive unit 300 of the Fig. 3. The flywheel 402 is arranged outside the housing 410 and directly connected to the driven disc 431, which is attached to the crankshaft 407 by means of the central screw 415, for example by welding as shown here. The rotor 417 is connected to the driven disc 431 by means of the input part 412, which contains the rigid disc part 414 with the axially elastic connecting part 433. The damper input part 419 corresponds to the damper input part 219 of the Fig. 2 connected to the rigid part of the disk part 414.

[0029] The Fig. Figure 5 shows a schematic sectional view of the upper part of the drive unit 500 arranged around the axis of rotation d. In contrast to the drive unit 300 of the Fig. 3 with the externally sealed housing 310 of the assembly 303, the internal combustion engine 501 is sealed between the crankshaft 507 and the housing 511 by means of the seal 524, so that a seal of the housing 510 against the driven plate 331 as in Fig. 3 shown can be omitted and only the seal 529 is provided between the housing 510 and the shaft 537.

[0030] The Fig. Figure 6 shows the difference between the drive unit 100 and the Fig. 1 slightly modified drive unit 600 with corresponding drive unit 500 of the Fig. 5 accordingly modified sealing concept with the seal 624 between the housing 611 of the internal combustion engine 601 and the crankshaft 607 with the seal between housing 610 and rotor 617 omitted, so that the housing section 125 of the Fig. 1 can be omitted.

[0031] The Fig. Figure 7 shows the difference between the drive unit 400 and the Fig. 4 slightly modified drive units 700 with corresponding drive units 500 Fig. 5 modified sealing concept with the seal 724 between the housing 711 of the internal combustion engine 701 and the crankshaft 707 with the seal between the housing 710 and the driven disc 731 omitted, so that the housing section for sealing the housing 710 against the driven disc 731 can also be omitted and the flywheel mass 702 can be extended at least radially outwards axially in the direction of the assembly 703.

[0032] The Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12 to Fig. Figure 13 shows the upper part of drive units 800, 900, 1000, 1100, 1200, 1300 arranged around the axis of rotation d, in which, in contrast to drive units 100, 200, 300, 400, 500, 600, 700 the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. Figure 7 shows a schematic sectional view of the torsional vibration damper 805, 905, 1005, 1105, 1205, 1305 connected upstream of the electric machine 804, 904, 1004, 1104, 1204, 1304. This means that the damper input part 819, 919, 1019, 1119, 1219, 1319 forms the input part 812, 912, 1012, 1112, 1212, 1312 of the assembly 803, 903, 1003, 1103, 1203, 1303.

[0033] The drive units 800, 900, 1000, 1100, 1200, 1300 differ from each other at least in the features described below.

[0034] The drive unit 800 of the Fig. 8 includes the flywheel 802, which is connected to the crankshaft 807 by means of the central screw 815. The damper input part 819 is firmly connected to the flywheel 802, for example by welding or riveting.

[0035] The damper outlet part 820 is firmly connected to the flange part 836, for example by welding or riveting. The flange part 836 is radially connected to the rotor 817 on the outside and radially to the outlet hub 821 on the inside, for example by welding.

[0036] Unlike the 800 drive unit of the Fig. 8 shows the drive unit 900 of the Fig. 9. The driven plate 931, which is connected to the crankshaft by means of the central screw 915, is mounted. The flywheel 902 is welded to the driven plate 931, and the damper input part 919 is bolted to the driven plate 931 by means of the fastening screws 934.

[0037] The rotor 917, the flange part 936 connected to it and the output hub 921 are axially preloaded against the damper input part 919 by means of the spring element 938, so that the seal 929 between the output hub 921 and the ring flange 939 of the shaft 937 is axially preloaded.

[0038] Based on the drive unit 100 of the Fig. 1 shows the drive unit 1000 of the Fig. 10 the flywheel 1002 which is attached directly to the crankshaft 1007 by means of the fastening screws 1006, on which the input part 1012 formed from the damper input part 1019 is received by means of the central screw 1015.

[0039] The drive unit 1100 of the Fig. 11 is different from the sealing concept of the drive unit 900. Fig. 9 similar. According to the differences in the sealing concept between the drive units 100, 600 of the Fig. 1 and Fig. 6 the drive unit 900 has no seal between crankshaft 907 and the housing of the internal combustion engine (not shown), while the drive unit 1100 has the seal 1124 between the crankshaft 1107 and the housing 1111 and a seal between the driven disc 1131 and the housing 1110 can be omitted.

[0040] Similarly, the drive units 1200 and 1300 of the Fig. 12 and Fig. 13 in contrast to the otherwise similar drive units 1000, 800 of the Fig. 10 and Fig. 8 each between the crankshaft 1207, 1307 and the housing 1211, 1311 the seal 1224, 1324, so that the respective seal between housing 1210, 1310 and the damper inlet part 1219 or the crankshaft 1307 as well as the radially inwardly extended housing section of the housing 1210, 1310 can be omitted. Reference symbol list 100 drive units 101 Internal combustion engine 102 flywheel mass 103 building units 104 Electric machine 105 Torsional vibration dampers 106 Fastening screw 107 Crankshaft 108 Central opening 109 Approach 110 cases 111 Housings 112 Entrance section 113 air gap 114 Disc part 115 Central screw 116 internal threads 117 Rotor 118 Stator 119 Damper inlet part 120 Damper output part 121 Output hub 122 Spring assembly 123 Screw compression spring 125 Housing section Paragraph 126 127 Seal 128 Flange part 129 Seal 130 Storage 200 drive unit 202 flywheel mass 203 building units 204 Electric machine 205 Torsional vibration dampers 206 Fastening screw 207 Crankshaft 210 cases 212 Entrance section 214 Disc part 215 Central screw 217 Rotor 219 Damper inlet part 220 Damper output part 222 Spring assembly 230 Storage 231 Drive plate 232 Centering ring 233 Connecting part 234 Fastening screw 236 Flange part 300 drive unit 302 flywheel 303 Construction unit 304 Electric machine 305 Torsional vibration damper 307 Crankshaft 310 cases 312 Entrance section 314 Disc part 315 Central screw 317 Rotor 319 Damper inlet part 330 Storage 331 Drive plate 333 Connecting part 334 Fastening screw 335 rivet 336 Flange part 400 drive unit 402 flywheel 407 Crankshaft 410 housing 412 Entrance section 414 Disc part 415 Central screw 417 Rotor 419 Damper inlet part 431 Drive plate 433 Connecting part 500 drive unit 501 Internal combustion engine 507 Crankshaft 510 case 511 Housing 524 Seal 529 Seal 537 wave 600 drive unit 601 Internal combustion engine 607 Crankshaft 610 case 611 Housing 617 Rotor 624 Seal 700 drive unit 701 Internal combustion engine 702 flywheel 703 building unit 707 Crankshaft 710 case 711 Housing 724 Seal 731 Drive plate 800 drive unit 802 flywheel 803 building unit 804 Electric machine 805 Torsional vibration damper 807 Crankshaft 812 Entrance section 815 Central screw 817 Rotor 819 Damper inlet part 820 Damper output part 821 Output hub 836 Flange part 900 drive unit 902 flywheel 903 building unit 904 Electric machine 905 Torsional vibration damper 907 Crankshaft 912 Entrance section 915 Central screw 917 Rotor 919 Damper Inlet Part 921 Output hub 929 Seal 931 Drive plate 934 Mounting screw 936 Flange part 937 wave 938 Spring element 939 Ringbord 1000 drive units 1002 flywheel mass 1003 building units 1004 Electric machine 1005 Torsional vibration damper 1006 Mounting screw 1007 Crankshaft 1012 Entrance section 1015 Central screw 1019 Damper inlet part 1100 drive unit 1103 building unit 1104 Electric machine 1105 Torsional vibration damper 1107 Crankshaft 1110 Housing 1111 Housing 1112 Entrance section 1119 Damper inlet part 1124 Seal 1131 Drive plate 1200 drive unit 1203 building unit 1204 Electric machine 1205 Torsional vibration damper 1207 Crankshaft 1210 case 1211 Housing 1212 Entrance section 1219 Damper inlet part 1224 Seal 1300 drive unit 1303 building unit 1304 Electric machine 1305 Torsional vibration damper 1307 Crankshaft 1310 Case 1311 Housing 1312 Entrance section 1319 Damper inlet part 1324 Seal d axis of rotation

Claims

[1] Drive unit (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300) in particular for a hybrid powertrain with an internal combustion engine (101, 601, 701) with a first housing (111, 511, 611, 711, 1111, 1211, 1311) and a crankshaft (107, 207, 307, 407, 507, 607, 707, 807, 907, 1007, 1107, 1207, 1307) and an electric machine (104, 204, 304, 804, 904, 1004, 1104, 1204, 1304) with a second housing (110, 210, 310, 410, 510, 610, 710, 1110, 1210, 1310) and a rotor (117, 217, 317, 417, 617, 817, 917), wherein the two housings (110, 111, 210, 310, 410, 510, 511, 610, 611, 710, 711, 1110, 1111, 1210, 1211, 1310, 1311) are fixed to each other, and a crankshaft (107, 207, 307, 407, 507, 607, 707, 807, 907, 1007, 1107, 1207, 1307) and rotor (117, 217, 317, 417, 617, 817, 917) are connected to each other in a rotationally locked manner, wherein a flywheel (102, 202, 302, 607, 707, 807, 907, 1007, 1107, 1207, 1307) is centered on the crankshaft (107, 207, 307, 407, 507, 607, 707, 807, 907, 1007, 1107, 1207, 1307).402, 702, 802, 902, 1002) is attached and an input part (112, 212, 312, 412, 812, 912, 1012, 1112, 1312) of a structural unit (103, 203, 303, 703, 803, 903, 1003, 1103, 1203, 1303) formed from the electric machine (104, 204, 304, 804, 904, 1004, 1104, 1204, 1304) and a torsional vibration damper (105, 205, 305, 805, 905, 1005, 1105, 1205, 1305) is mounted in a rotationally fixed manner, , characterized by , that the flywheel (102, 202, 1002) is connected to the crankshaft (107, 207, 1007, 1207) by means of fastening screws (106, 206, 1006) distributed around the circumference and the input part (112, 212, 1012, 1212) is connected to the crankshaft (107, 207, 1007, 1207) by means of a central screw (115, 215, 1015). [2] Drive unit (200, 300, 400, 500) according to claim 1, characterized by , that the input part (212, 312, 412) is axially elastic. [3] Drive unit (300, 500) according to claim 2, characterized by, that the axially elastic input part (312) is connected to the crankshaft (307, 507) and the flywheel (302) is arranged radially outside an axially elastic connecting part (333) of the input part (312). [4] Drive unit (100, 200, 300, 400, 500, 600, 700) according to one of claims 1 to 3, characterized by , that the rotor (117, 217, 317, 417, 617) is connected to the input part (112, 212, 312, 412) of the assembly (103, 203, 303, 703) and the torsional vibration damper (105, 205, 305) is connected downstream of the rotor (117, 217, 317, 617). [5] Drive unit (800, 900, 1000, 1100, 1200, 1300) according to one of claims 1 to 3, characterized by , that the torsional vibration damper (805, 905, 1005, 1105, 1205, 1305) forms the input part (812, 912, 1012, 1112, 1212, 1312) and is connected upstream of the rotor (817, 917). [6] Drive unit (500, 600, 700, 1100, 1200, 1300) according to one of claims 1 to 5, characterized by, that the internal combustion engine is sealed between the crankshaft (507, 607, 707, 1107, 1207, 1307) and the first housing (511, 611, 711, 1111, 1211, 1311). [7] Drive unit (100, 200, 300, 400, 800, 900, 1000) according to any one of claims 1 to 6, characterized by , that the building unit (103, 203, 303, 803, 903, 1003) is sealed to the outside.

Images