HYBRID MODULE FOR A DRIVE TRAIN AND ASSEMBLY OF A HYBRID MODULE OF THIS TYPE

Abstract

A hybrid module is provided for the drivetrain of a motor vehicle, which drivetrain has an electric machine, an internal combustion engine and a transmission. The hybrid module has (i) a first unit with a rotor element and a separating clutch which is arranged within the rotor element, (ii) a second unit with a clutch device comprising at least one clutch, and (iii) a third unit with a housing part. The first unit and the second unit are connected to each other to form a preassembled overall unit, and said overall unit is installed projecting into the third unit and is connected here to the third unit. A hybrid module constructed in such a manner can be produced by means of particularly simple assembly and is very compact. A method for assembly of said hybrid module is also provided.

Claims

1-10. (canceled)

11. A hybrid module comprising: a first unit including a rotor element and a separating clutch arranged within the rotor element; a second unit including a clutch device comprising at least one clutch; and, a third unit including a housing part, wherein: the first unit and the second unit are connected to each other to form a preassembled overall unit; and, the preassembled overall unit is connected to the third unit and the preassembled overall unit projects into the third unit.

12. The hybrid module of claim 11, wherein a function of the second unit can be checked individually prior to installation.

13. The hybrid module of claim 11, wherein a function of at least two of the first unit, the second unit and the third unit can be checked individually prior to installation.

14. The hybrid module of claim 11, wherein the first unit and the second unit are connected by a fastener.

15. The hybrid module of claim 14, wherein the fastener is a bolt or a rivet.

16. The hybrid module of claim 11, wherein the first unit and the second unit are connected by welding.

17. The hybrid module of claim 11, wherein: the clutch device includes a counter plate; and, the rotor element is connected to the counter plate.

18. The hybrid module of claim 11, wherein: the clutch device includes a counter plate and an intermediate element connected to the counter plate; and, the rotor element is connected to the intermediate element.

19. The hybrid module of claim 11, wherein the overall unit is connected to the third unit by a releasable connection.

20. The hybrid module of claim 19 wherein the releasable connection is a screw connection.

21. The hybrid module of claim 11, wherein a connection of the preassembled overall unit to the third unit is arranged to be manipulated on an engine side of the hybrid module.

22. The hybrid module of claim 11 wherein the rotor element is a rotor element of an electric machine or a roller arranged for driving connection with an electric machine via a belt drive.

23. The hybrid module of claim 11 wherein the rotor element, the separating clutch and the clutch device are mounted jointly via a bearing unit.

24. A drivetrain of a motor vehicle comprising: an electric machine; an internal combustion engine; a transmission; and, the hybrid module of claim 11.

25. A method for assembly of a hybrid module for a drivetrain of a motor vehicle comprising: providing a first unit with a rotor element and a separating clutch arranged within the rotor element; providing a second unit with a clutch device comprising at least one clutch; providing a third unit with a housing part; connecting the first unit to the second unit to form a preassembled overall unit; and, installing the preassembled overall unit into the third unit such that the preassembled overall unit projects into the third unit and is connected to the third unit.

26. The method of claim 25, further comprising: providing a drivetrain with an electric machine, an internal combustion engine, and a transmission with a housing; inserting the hybrid module into the housing; and, fastening the third unit to the housing.

27. The method of claim 26 wherein the third unit is fastened to the housing by screwing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Embodiments of the disclosure, to which this disclosure is however not restricted and from which further features according to the disclosure can emerge, are shown in the following figures.

[0030] In the figures:

[0031] FIG. 1 shows a hybrid module according to a first embodiment of the disclosure,

[0032] FIG. 2 shows a different illustration of the hybrid module shown in FIG. 1, and

[0033] FIG. 3 shows a hybrid module according to a second embodiment of the disclosure.

DETAILED DESCRIPTION

[0034] FIG. 1 shows a part of a drivetrain 10 of a motor vehicle in a sectional illustration. In the drivetrain 10, an electric machine 12 is arranged between an internal combustion engine (not shown) and a transmission (likewise not shown). The electric machine 12 serves as a drive machine and is part of a hybrid module 14. Said hybrid module 14 has the following main components: (i) a first unit 16 with a rotor element 18 designed as a rotor of the electric machine 12, with a K0 separating clutch 20 arranged within the rotor element 18, and with at least one second unit 28 which is connected to the rotor element 18 for rotation therewith and has a clutch device 24, (ii) a third unit (housing unit) 28 partially accommodating the first unit 16 and a stator 26 of the electric machine 12, (iii) a dual mass flywheel 30 which is connected upstream of the separating clutch 20 in the drivetrain 10, and (iv) a housing part 32, which accommodates the clutch device 24, of the transmission. The clutch device 24 is designed as a dual clutch 34. Accordingly, the transmission is designed as a dual clutch transmission, of which only the two transmission input shafts 36, 38 are illustrated.

[0035] The following path of the drivetrain is realized: Output shaft 40 of the internal combustion enginedual mass flywheel 30K0 separating clutch 20rotor element 18 as rotorclutch device 24transmission input shaft 36, 38. The corresponding shafts 36, 38, 40 lie here on a common axis 42, which forms the main axis of the hybrid module 14.

[0036] The clutch device 24 which is designed as a dual clutch 34 has two clutches 44, 46 with corresponding pressure plates 48, counterplates 50, clutch disks 51 and actuating devices.

[0037] The rotor element 18 which is designed as a rotor has, in its interior, a rotor bearing arrangement 52 which serves as a central bearing unit 54 via which the entire first unit 16 is mounted rotatably in the third unit 28. In this example, the connection between rotor element 18 and second unit 22 for conjoint rotation is realized as an indirect connection between a rotor lamination 56 of the rotor 18 and the counterplates 50 of the clutch device 24 via intermediate elements 60.

[0038] The separating clutch 20 is designed as a hydraulically actuable clutch and is actuated by means of a disengagement device 62, which is designed as a concentric slave cylinder, by means of a pressure pot via a pressure connection 64.

[0039] On the engine side, an intermediate wall 66 is arranged between electric machine 12 and dual mass flywheel 30. Said intermediate wall is formed partially by the first unit 16 and partially by the third unit 28 by means of a screw connection 68.

[0040] The second unit 22 with the clutch device 24, i.e. in particular with the dual clutch 34 illustrated, is screwed, riveted or welded, in a manner separable for servicing, to the first unit 16, which, in addition to the rotor element 18, contains the separating clutch K0 20 and the shaft driven by the internal combustion engine, to form a preassembled overall unit 16, 22. For a simple connection, it can be advantageous to connect the rotor element 18 to the clutch device 24 via an additional plate. In the case of a screw connection, separation can take place directly, in the case of a riveted connection the rivets merely have to be drilled out and reassembly is easily possible using new rivets. Welding is also possible, but the overall unit then can no longer be removed without being cut open. The stator 26 of the electric machine (E motor) 12 can be arranged coaxially around the rotor 18. Alternatively, however, a replacement at the assembly position of the rotor 18 could also be a rotor element which is designed as a pulley, chain pinion, gearwheel, etc., via which the torque of an electric machine 12 arranged axially parallel can be introduced into the transmission (assembly step MS1).

[0041] The resulting overall unit 16, 22 is completely fitted into the preassembled third unit 28 and is preferably screwed to the latter (assembly step MS2).

[0042] This entire unit in turn is fitted into the transmission housing. In the process, the clutch disks 51 are pushed onto the transmission input shaft(s) 36, 38, the solid shaft is mounted in the shaft driven by the internal combustion engine, and the actuating elements of the dual clutch 34 are brought into contact with the engagement bearings, which are preassembled on the transmission side (assembly step MS3). Furthermore, the following resulting advantages are realized:

[0043] A separate mounting of the clutch device 24 (dual clutch 34) in the transmission is not necessary since the actuating forces are supported by the rotor mounting 52 of the rotor 18 and therefore the clutch device 24 (dual clutch 34) is also mounted axially and radially.

[0044] The radial compensation of the offset between entire unit 16, 22, 28 and transmission is undertaken via the frictional contact of the clutch disks 51. Axial tolerances can be compensated for by varying the axial paths in the engagement system.

[0045] FIG. 2 shows another (sectional) illustration of the hybrid module 14 shown in FIG. 1. It can be seen in this illustration that the engine-side intermediate wall 66 is formed partially by the first unit 16 and partially by the third unit 28 by means of a screw connection 68 of corresponding parts.

[0046] FIG. 3 shows another embodiment of the hybrid module 14. This embodiment substantially corresponds to the embodiment of the hybrid module 14 from FIGS. 1 and 2, and therefore only the differences will be discussed here. In this hybrid module 14 which is depicted in FIG. 3, the dual clutch 34 is designed as a 3-plate dual clutch.

[0047] When the clutch device 24 is mounted in the hybrid module 14, axial and radial forces are absorbed by the rotor mounting 52.

[0048] The rotor element 18 forms the axial end stop of the pressure plate 48 which is actuated by a tie rod and is spaced apart with leaf springs in the open state of the clutch device 24.

[0049] The central plate acting as the counterplate 50 is connected to the rotor 18 via a thin plate (preferably welded to the rotor element 18 or produced integrally by a forming process), wherein the plate is screwed, riveted (or welded, in which case is nonremovable) to the central plate directly or via a sheet-metal intermediate part.

[0050] The assembly of the overall unit 18, 22, 28 and of the transmission is also carried out here by (i) fastening the rotor element 18 (of the first unit 16) to the clutch device 24 (of the second unit 22), (ii) inserting the preassembled overall unit 16, 22 obtained in this manner into the previously fitted third unit 28, which accommodates the electric machine 12, and fastening the preassembled overall unit 16, 22 to the third unit 28, and by (iii) inserting an overall unit obtained in such a manner into a housing of the transmission.

LIST OF REFERENCE NUMBERS

[0051] 10 Drivetrain [0052] 12 Machine, electric [0053] 14 Hybrid module [0054] 16 Unit, first [0055] 18 Rotor element [0056] 20 Separating clutch, K0 [0057] 22 Unit, second [0058] 24 Clutch device [0059] 26 Stator, electric machine [0060] 28 Unit, third [0061] 30 Dual mass flywheel [0062] 32 Housing part (transmission) [0063] 34 Dual clutch [0064] 36 Transmission input shaft, first [0065] 38 Transmission input shaft, second [0066] 40 Output shaft [0067] 42 Axis [0068] 44 Clutch, first [0069] 46 Clutch, second [0070] 48 Pressure plate [0071] 50 Counterplate [0072] 51 Clutch disk [0073] 52 Rotor mounting [0074] 54 Bearing unit, central (module unit) [0075] 56 Rotor lamination [0076] 58 Connection [0077] 60 Intermediate element [0078] 62 Disengagement element [0079] 64 Pressure connection [0080] 66 Intermediate wall [0081] 68 Screw connection