WO2022117138A1

WO2022117138A1 - Hybrid module

Info

Publication number: WO2022117138A1
Application number: PCT/DE2021/100843
Authority: WO
Inventors: René Daikeler; Olaf Werner; Jens Martin; Radmir ISHMURATOV; Andreas Weigl
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2020-12-01
Filing date: 2021-10-20
Publication date: 2022-06-09
Also published as: DE102020131760A1; CN220742700U

Abstract

The invention relates to a hybrid module (1) for coupling and decoupling an internal combustion engine (4) to and from a power train of a motor vehicle, said hybrid module (1) comprising an electric motor (6) and a disconnect clutch (7) which is located within the electric motor (6) in a radial direction (R) of the hybrid module (1) and which includes: - a counter-pressure plate (24), - a pressure plate (27) that is movable to a limited extent in an axial direction (A) of the hybrid module (1), and - at least one clutch disk (34, 35) which can be frictionally engagingly clamped between the counter-pressure plate (24) and the pressure plate (27); the clutch disk (34, 35) is rotationally fixedly connected to an input shaft (8) of the hybrid module (1) within a rotor (16) of the electric motor (6) in the axial direction (A), and the input shaft (8) is rotatably mounted relative to a support wall (17) of the electric motor (6) and has no axial and radial bearing within the rotor (16) in the axial direction (A), the support wall (17) directly or indirectly supporting a stator (15).

Description

hybrid module

The present invention relates to a hybrid module for coupling and decoupling an internal combustion engine to and from a drive train of a motor vehicle. The hybrid module has an electric motor and a separating clutch, which is arranged in the radial direction of the hybrid module inside the electric motor, and which has a counter-pressure plate, a pressure plate that can be displaced to a limited extent in the axial direction of the hybrid module, and a pressure plate that is arranged between the counter-pressure plate and the pressure plate and delimited in the axial direction has movable intermediate pressure plate. Furthermore, the separating clutch has frictionally clampable clutch disks between counter-pressure plate, intermediate pressure plate and pressure plate.

A drive train of a hybrid vehicle usually includes a combination of an internal combustion engine and an electric motor, and allows - for example in urban areas - a purely electric mode of operation with simultaneous sufficient range and availability for cross-country trips. In certain operating situations, there is also the option of being driven simultaneously by the internal combustion engine and the electric motor. In hybrid vehicles, the electric motor usually replaces the starter motor that used to be used for the internal combustion engine and the alternator that used to be used in the past, in order to reduce the increase in weight of the hybrid vehicle compared to vehicles powered exclusively by internal combustion engines.

As is known from EP 0 773 127 A1, a separating clutch can be arranged between the internal combustion engine and the electric motor in order to separate the internal combustion engine from the electric motor and from the remaining drive train of the hybrid vehicle. In the case of purely electric operation, the separating clutch, which is also known as the KO clutch, is then opened and the combustion engine is switched off, so that the drive torque of the hybrid vehicle is applied exclusively by the electric motor.

Such separating clutches are usually actuated by means of a hydraulic actuating system. A hydraulic actuation system usually has a master cylinder that transmits the pressure generated in the master cylinder to a slave cylinder via a hydraulic pressure line. The slave cylinder transmits the hydraulic pressure to a lifting system by means of a piston that can be displaced in the axial direction, with the interposition of a clutch release bearing. fully hydraulic Actuation systems, such as are generally used in hybrid modules, can be equipped with a concentric slave cylinder, for example, which is often also referred to as a concentric slave cylinder (CSC). These actuation systems, which are based on a central slave cylinder, require a comparatively large amount of space within a hybrid module.

A hybrid module can be divided into the following categories PO to P5 depending on the arrangement or the point of intervention of the electric motor in the drive train:

PO: The electric motor is arranged in the torque path in front of the combustion engine and is coupled to the combustion engine via a belt, for example. With this arrangement of the electric motor, it is also sometimes referred to as a belt starter generator (BSG).

P1 : The electric motor is located directly behind the combustion engine in the torque path. The electric motor can be arranged, for example, fixed to the crankshaft in the torque path in front of the starting or gear change clutch.

P2: The electric motor is located in the torque path between a separating clutch, often referred to as a KO clutch, and the starting or gear-change clutch, but in the torque path in front of the vehicle transmission.

P3: The electric motor is arranged in the vehicle transmission and/or on the transmission output shaft.

P4: The electric motor is arranged on an existing or separate vehicle axle.

P5: The electric motor is arranged on or in the driven vehicle wheel, for example as a wheel hub motor.

The separating clutches required for the hybridization of conventional drive trains have to meet special requirements in terms of size and energy efficiency compared to conventional starting and gear-change clutches. In particular, separating clutches for P2 hybrid modules must have particularly low drag torque in the open or disengaged state. If the vehicle is driven by the electric motor and the internal combustion engine is switched off, the disengaged separating clutch often results in high differential speeds between the drive side for a long period of time and the output side of the separating clutch. Even small drag torques that occur in the separating clutch can quickly lead to impermissibly large energy inputs due to the large differential speeds. If the energy input in the disengaged separating clutch is too high, this can lead to increased wear on the friction linings of the clutch disc and thus to premature failure of the separating clutch. High energy inputs into the disengaged separating clutch can also negatively affect the range that the motor vehicle can cover with one battery charge without support from the internal combustion engine.

It is the object of the present invention to enable a hybrid module with a design that is as compact as possible.

This object is achieved according to the invention by a hybrid module having the features of the independent claim. Preferred configurations of the hybrid module are set out in the dependent claims.

According to a first aspect, a hybrid module for coupling and decoupling an internal combustion engine to and from a drive train of a motor vehicle is proposed, with an electric motor and a separating clutch, which is arranged in the radial direction of the hybrid module inside the electric motor, and the one counter-pressure plate, one has a pressure plate that can be displaced to a limited extent in the axial direction of the hybrid module and an intermediate pressure plate that is arranged between the counter-pressure plate and the pressure plate and can be displaced to a limited extent in the axial direction, and has clutch disks that can be clamped with frictional engagement between the counter-pressure plate, intermediate pressure plate and pressure plate, the electric motor having a rotor which is connected by a rotor web with respect to a stator of the electric motor is rotatably supported, the rotor web being connected in the radial direction outside the clutch discs to a rotor carrier or merging into a rotor carrier, on the outside of which the rotor is located is rotatably formed with the rotor carrier. Since the pressure plate and/or the intermediate pressure plate is/are connected non-rotatably via leaf springs on the inside of the rotor carrier to the rotor carrier or to the rotor web or to the counter-pressure plate, a compact design is made possible.

According to a preferred exemplary embodiment, the rotor web is supported by a rotor bearing in a stationary and rotatable manner in the axial direction on a support wall that directly or indirectly supports the stator of the electric motor. This type of storage further reduces the space required. Furthermore, it is advantageous if the rotor carrier and/or the rotor has or have recesses distributed in the circumferential direction of the hybrid module, through which the hybrid module can be non-rotatably connected, in particular is connected, to a torque converter and/or a converter lockup clutch. The installation space required can also be further reduced by means of these recesses.

According to a further preferred exemplary embodiment, the pressure plate is in contact with a pressure pot of a concentric hydraulic actuating device rotating with the rotor carrier for engaging and/or disengaging the separating clutch. Since this means that a separate release bearing can be dispensed with, the installation space required can be further reduced.

According to a further preferred exemplary embodiment, at least one of the clutch disks is connected in a rotationally fixed manner and fixed in the axial direction to an input shaft that can be connected in rotation to the internal combustion engine. Thus, there is no need to provide a spline that can be displaced in the axial direction, as a result of which the installation space required can be further reduced.

Furthermore, it is advantageous if the input shaft is rotatably supported on the rotor web of the electric motor by means of an axial and radial bearing. This also further reduces the installation space required by the hybrid module.

The input shaft preferably has a flange to which at least one of the clutch disks is non-rotatably connected via at least one spring device and is elastically connected in the axial direction, as a result of which the installation space required by the hybrid module can be further reduced.

Furthermore, it is advantageous if a first spring plate of a first spring device has openings spaced apart in the circumferential direction of the hybrid module, through which axial sections of a second spring device of the other clutch disk extend in the axial direction. This design enables a particularly compact clutch disc assembly, which means that the installation space required by the hybrid module can be further reduced.

It is particularly advantageous if the friction linings of the other clutch disc are in the axial direction

Direction are arranged on one side of the first spring plate, and a second Spring plate of the second spring device for elastic connection in the axial direction to the flange of the input shaft is arranged in the axial direction on another side of the first spring plate, whereby the space requirement of the clutch disc assembly or the hybrid module can be further reduced.

According to a second aspect, which can preferably also be considered independently of the first aspect and/or the preceding preferred exemplary embodiments, a hybrid module for coupling and decoupling an internal combustion engine to and from a drive train of a motor vehicle is proposed, with an electric motor and a separating clutch which is arranged in the radial direction of the hybrid module inside the electric motor, and which has a counter-pressure plate, a pressure plate that can be displaced to a limited extent in the axial direction of the hybrid module, and at least one clutch disk that can be clamped by friction between the counter-pressure plate and the pressure plate, the clutch disk being located in the axial direction inside a rotor of the electric motor is rotatably connected to an input shaft of the hybrid module. Since the input shaft is rotatably mounted with respect to a support wall of the electric motor that directly or indirectly supports a stator and is designed without axial and radial bearings in the axial direction within the rotor, the installation space of the hybrid module can be reduced.

It is advantageous if the input shaft is supported in a rotatable manner on a rotor web of the electric motor by means of an axial and radial bearing, and the rotor web is supported in a rotatable manner on the support wall by means of a rotor bearing. As a result, the installation space required by the hybrid module can be further reduced.

The axial and radial bearings of the input shaft preferably overlap in the axial direction with the center of gravity of the input shaft. This type of storage means that no additional support bearings are required to prevent the input shaft from tilting, which means that the installation space required by the hybrid module can be further reduced.

It is advantageous if the counter-pressure plate forms the rotor web, as a result of which the installation space required by the hybrid module can be further reduced.

According to a further preferred exemplary embodiment, an end of the input shaft on the internal combustion engine side has a pilot bearing, by means of which the input shaft can be mounted in a rotatable manner on a crankshaft of the internal combustion engine. The hybrid module itself can be made more compact by this type of storage. According to a third aspect, which can preferably be considered independently of the first and/or second aspect and/or the preceding preferred exemplary embodiments, a clutch disc assembly for a multi-disc separating clutch of a hybrid module for coupling and decoupling an internal combustion engine to and from a drive train of a Proposed motor vehicle, with at least a first clutch disc and at least a second clutch disc, both of which are fixed in rotation and in the axial direction of the clutch disc assembly fixed to a flange, and both each have a spring means effective in the axial direction. Since the spring device of the first clutch disc has openings spaced apart in the circumferential direction of the clutch disc assembly, through which axial sections of the spring device of the second clutch disc extend in the axial direction, the clutch disc assembly can be made particularly compact.

According to a preferred exemplary embodiment, the openings are spaced evenly apart from one another in the circumferential direction by an angular measure. Furthermore, the axial sections are evenly spaced from one another in the circumferential direction with the same angular dimension, so that both clutch disks can be assembled rotated relative to one another by integer multiples of the angular dimension. This also allows the installation space required by the clutch disc assembly to be reduced.

Furthermore, it is advantageous if the first clutch disc has a first imbalance and the second clutch disc has a second imbalance, and both clutch discs are assembled rotated relative to one another such that the total imbalance formed from the first and second imbalance is minimal. This also enables a particularly compact clutch disk assembly, in particular when no separate balancing weights are provided on the clutch disk assembly.

The first clutch disc is preferably non-rotatably connected via at least one first spring plate as the first spring device and is connected elastically to the flange in the axial direction. Since the first spring plate has the openings spaced apart in the circumferential direction, the clutch disk assembly can be made particularly compact.

Furthermore, it is advantageous if the second spring device as at least spacer bolts

Has axial sections, a brake pad carrier ring and a second spring plate, wherein the The brake pad carrier ring is arranged on one side of the first spring plate, the second spring plate is arranged on the other side of the first spring plate, and the spacer bolts connect an inner area of the brake pad carrier ring to an outer area of the second spring plate through the openings in the first spring plate. A particularly compact clutch disk assembly is thus possible.

The two spring plates are preferably connected, preferably riveted, to the flange on different sides of the flange. As a result, the space requirement for the clutch disc assembly can be further reduced.

Furthermore, a hybrid module for coupling and decoupling an internal combustion engine to and from a drive train of a motor vehicle is proposed, with an electric motor and a separating clutch, which is arranged in the radial direction of the hybrid module inside the electric motor, and which has a counter-pressure plate, one in the axial direction of the Hybrid module has a pressure plate that can be displaced to a limited extent and an intermediate pressure plate that is arranged between the counter-pressure plate and the pressure plate and that can be displaced to a limited extent in the axial direction, and a clutch disc assembly according to one of the preceding exemplary embodiments, the first clutch disc between the counter-pressure plate and the intermediate pressure plate, and the second clutch disc between the intermediate pressure plate and the pressure plate can be frictionally clamped. Such a hybrid module can be made particularly compact.

The electric motor preferably has a rotor which is supported by a rotor bar so that it can rotate with respect to a stator of the electric motor, the counter-pressure plate forming the rotor bar. As a result, the space requirement of the hybrid module can be further reduced.

Furthermore, the flange is preferably formed on an input shaft that can be connected in rotation to the internal combustion engine, as a result of which the installation space of the hybrid module is further reduced.

Furthermore, a method for assembling a clutch disc assembly, in particular according to one of the preceding exemplary embodiments, for a multi-disc separating clutch of a hybrid module for coupling and decoupling an internal combustion engine to and from a drive train of a motor vehicle is proposed, with at least one first clutch disc which has a first imbalance , and at least one second clutch disc, which has a second unbalance, wherein both clutch discs are twisted relative to one another in such a way that the total imbalance formed by the first and second imbalance is minimal, and the two clutch discs rotate with minimal total imbalance and are firmly fastened to a flange in the axial direction of the clutch disc assembly. This method enables the assembly of a particularly compact clutch disc assembly.

According to a fourth aspect, which can preferably be considered independently of the first and/or second and/or third aspect and/or the preceding preferred exemplary embodiments, a hybrid module for coupling and decoupling an internal combustion engine to and from a drive train of a motor vehicle is proposed , with an electric motor and a separating clutch, which is arranged in the radial direction of the hybrid module within the electric motor, and the one counter-pressure plate, a pressure plate that can be displaced to a limited extent in the axial direction of the hybrid module, and an intermediate pressure plate that is arranged between the counter-pressure plate and the pressure plate and can be displaced to a limited extent in the axial direction has, and between counter-pressure plate, intermediate pressure plate and pressure plate has frictionally clampable clutch disks, wherein the electric motor has a rotor which is rotatably supported by a rotor web with respect to a stator of the electric motor. Since the counter-pressure plate forms the rotor web, the hybrid module can be made particularly compact.

According to a preferred exemplary embodiment, the rotor web designed as a counter-pressure plate is connected to a rotor carrier in the radial direction outside the clutch disk or merges into a rotor carrier on the outside of which the rotor is designed to be non-rotatable with the rotor carrier. As a result, the installation space required by the hybrid module can be further reduced.

It is advantageous if the pressure plate and/or the intermediate pressure plate is/are connected non-rotatably to the rotor carrier or to the rotor web with leaf springs on the inside of the rotor carrier. This also allows the installation space required by the hybrid module to be further reduced.

According to a fifth aspect, which can preferably be considered independently of the first and/or second and/or third and/or fourth aspect and/or the preceding preferred exemplary embodiments, a hybrid module for coupling and decoupling an internal combustion engine to and from a drivetrain one Proposed motor vehicle, with an electric motor and a separating clutch, which is arranged in the radial direction of the hybrid module within the electric motor, and which has at least two pressure plates, of which at least one pressure plate is connected by leaf springs within a rotor carrier, on the outside of which a rotor of the electric motor is non-rotatably connected to the Rotor carrier is formed, is connected in a rotationally fixed manner by means of rivet connections and can be moved in the axial direction of the hybrid module on the other pressure plate in order to frictionally clamp a clutch disc between the pressure plates. Since the riveted joints limit an engagement path of one pressure plate before a wear limit of the clutch disk is reached, separate components for limiting the engagement path can be dispensed with, as a result of which the hybrid module can be made particularly compact.

The wear limit of the clutch disk is preferably reached when a friction lining of the clutch disk has the same height as a head of a rivet with which the friction lining is riveted to a spring device of the clutch disk.

According to a further preferred exemplary embodiment, a head of the riveted connection of the leaf spring can be brought into contact with the other pressure plate or with an element which is fixed with respect to the rotor carrier, in order to limit the engagement path of one pressure plate. As a result, the installation space required by the hybrid module can be further reduced.

Furthermore, it is advantageous if one pressure plate is designed as a pressure plate and the other pressure plate as a counter-pressure plate, which is fixed in the axial direction, of the single-disc or multi-disc separating clutch.

Alternatively, it is advantageous if one pressure plate is designed as a pressure plate and the other pressure plate as an intermediate pressure plate of the multi-disc separating clutch.

Alternatively, it is also advantageous if one pressure plate is designed as an intermediate pressure plate and the other pressure plate is designed as a counter-pressure plate, which is fixed in the axial direction, of the multi-disc separating clutch.

The present invention is explained in more detail below using preferred exemplary embodiments in conjunction with the associated figures. In these show:

Figure 1 shows a half sectional view through a first embodiment of a hybrid module, FIG. 2 shows a half sectional view through a second exemplary embodiment of a hybrid module,

FIG. 3 shows a half sectional view through a third exemplary embodiment of a hybrid module,

FIG. 4 shows a detailed view of a disconnect clutch of a fourth exemplary embodiment of a hybrid module,

FIG. 5 shows a detailed view of a separating clutch of a fifth exemplary embodiment of a hybrid module when new,

FIG. 6 shows a detailed view of the separating clutch from FIG. 5 in the worn state, and

FIGS. 7a to 7c show a schematic view of a method for assembling a clutch disc assembly for a multi-disc separating clutch of a hybrid module.

FIGS. 1 to 7c show exemplary embodiments of a hybrid module 1, more precisely a P2 hybrid module, a clutch disk assembly 33 for a multi-disc separating clutch 7 of the hybrid module 1 and a method for assembling the clutch disk assembly 33. Features and feature combinations that are not shown as essential to the invention in the description of FIGS. 1 to 7c are to be understood as optional.

The hybrid module 1, which is shown in Figure 1 in a half sectional view, has an input side 2 and an output side 3. The hybrid module 1 can be connected directly or indirectly to an internal combustion engine 4 via the input side 2 . In the exemplary embodiment shown, the internal combustion engine 4 is connected to an input-side torsional vibration damper 5, for example a dual-mass flywheel with arc springs or straight compression springs, in particular in conjunction with a centrifugal pendulum. The torsional vibration damper 5 on the input side is non-rotatably connected to the input side 2 of the hybrid module 1 via its output side, preferably by means of a spline 9. On its output side 3, the hybrid module 1 is rotationally connected to a torque converter and/or a converter lockup clutch 50. A transmission shaft 49 which is arranged coaxially with an input shaft 8 of the hybrid module 1 can extend through the torque converter and/or the converter lock-up clutch 50 . The input shaft 8 of the hybrid module 1 extends in the axial direction A of the hybrid module 1 and defines an axis of rotation D of the hybrid module 1.

The hybrid module 1 has an electric motor 6 and the separating clutch 7 . The electric motor 6 is an electric machine that can be operated both as a motor drive and as a generator as a generator. The separating clutch 7 is a so-called KO clutch, which is designed for coupling and decoupling the internal combustion engine 4 to and from a drive train of a motor vehicle in which the hybrid module 1 is arranged. The separating clutch 7 is arranged inside the electric motor 6 in the radial direction R of the hybrid module 1 . In the exemplary embodiment shown, the separating clutch 7 is designed as a dry multi-plate clutch, but it can also be designed as a dry multi-plate clutch or a dry single-plate clutch. A design as a wet multi-plate clutch is also possible.

On the input side 2 of the hybrid module 1, the torque of the internal combustion engine 4 can be transmitted to the input shaft 8 of the hybrid module 1 either directly or indirectly via the torsional vibration damper 5 on the input side. The input shaft 8 can also be referred to as an intermediate shaft or hybrid shaft.

In the case of a direct connection of the internal combustion engine 4 to the hybrid module 1, the input shaft 8 can also be the crankshaft itself or an extension of the crankshaft of the internal combustion engine 4. The input shaft 8 is rotatably mounted with respect to the electric motor 6 by a bearing on the input side, which is designed as an axial and radial bearing 11 . For this purpose, the axial and radial bearing 11 is arranged between the input shaft 8 lying on the inside in the radial direction R and a rotor web 20 of the electric motor 6 lying on the outside in the radial direction R.

The input shaft 8 has an end 13 on the internal combustion engine side and an end 14 on the transmission side. The transmission-side end 14 defines the end of the input shaft 8 facing away from the internal combustion engine 4. While in the illustrated embodiment the splines 9 are formed on the internal combustion engine-side end 13 of the input shaft 8, the transmission-side end 14 of the input shaft 8 points in the illustrated embodiment, a transmission shaft bearing 19, via which the input shaft 8 is supported on the transmission shaft 49 and centered. In the exemplary embodiment illustrated in FIG. 1, the axial and radial bearings 11 and a flange 10 of the input shaft 8 are arranged in the axial direction A between the end 13 on the internal combustion engine side and the end 14 on the transmission side.

In the axial direction A, the flange 10 of the input shaft 8 is formed inside the separating clutch 7 . Likewise, the flange 10 of the input shaft 8 is formed in the radial direction R within the separating clutch 7 . Furthermore, the flange 10 in the embodiment shown in FIG.

The flange 10 is part of the clutch disc assembly 33 which includes a first clutch disc 34 and a second clutch disc 35 in the embodiment shown in FIG. Thus, at least one of the clutch disks 34, 35 is non-rotatably and firmly connected in the axial direction A to the input shaft 8, which can be connected in rotation to the internal combustion engine 4.

The separating clutch 7 has a stationary counter-pressure plate 24 in the axial direction A, a pressure plate 27 that can be displaced to a limited extent in the axial direction A, and an intermediate pressure plate 26 that is arranged between the counter-pressure plate 24 and the pressure plate 27 and can be displaced to a limited extent in the axial direction A. Furthermore, the separating clutch 7 has the clutch disk assembly 33 that can be clamped with a friction fit between the counter-pressure plate 24, the intermediate pressure plate 26 and the pressure plate 27, the first clutch disk 34 being frictionally engaged between the counter-pressure plate 24 and the intermediate pressure plate 26, and the second clutch disc 35 being frictionally engaged between the intermediate pressure plate 26 and the pressure plate 27 can be clamped.

The electric motor 6 has a rotor 16 which is rotatably supported by the rotor bar 20 with respect to a stator 15 of the electric motor. The rotor web 20 is connected to a rotor carrier 21 in the radial direction R outside the clutch disks 34, 35 or in the radial direction R outside the clutch disk assembly 33 or merges into a rotor carrier 21. On the outside of the cylindrical or pot-wall-shaped rotor carrier 21 , the rotor 16 is configured in a rotationally fixed manner with the rotor carrier 21 . The pressure plate 27 and/or the intermediate pressure plate 26 is/are connected to the rotor carrier 21 or to the rotor web 20 or to the counter-pressure plate 24 in a torque-proof manner via leaf springs 30 on the inside of the rotor carrier 21 . In particular, the leaf springs 30 to which the pressure plate 27 is attached and the leaf springs 30 to which the intermediate pressure plate 26 is attached are distributed in the circumferential direction U of the hybrid module 1 . Where necessary, the leaf springs 30 are spaced apart from the counter-pressure plate 24 in the axial direction A by an intermediate element 25, for example an intermediate ring. To attach the leaf springs 30 to the counter-pressure plate 24, a rivet connection 31 is preferably formed, which extends in the axial direction A through the counter-pressure plate 24, the intermediate element 25 and the leaf springs 30, more precisely through the ends of the leaf springs 30 that are stationary in the axial direction A. The riveted connection 31 connects all three components or groups of components, namely the counter-pressure plate 24, the intermediate element 25 and the leaf springs 30 to one another.

The rotor carrier 21 is arranged in the radial direction R outside the counter-pressure plate 24 or outside the intermediate element 25 . The rotor support 21 is connected to the counter-pressure plate 24 and/or the intermediate element 25 in a rotationally fixed and axially fixed manner on its end facing the input side 2 of the hybrid module 1 . It is also possible for the rotor carrier 21 to be formed in one piece with the counter-pressure plate 24 or in one piece with the intermediate element 25 , in which case the rotationally fixed and axially fixed connection to the counter-pressure plate 24 is provided by the riveted connection 31 .

On its end facing the output side 3 of the hybrid module 1, the rotor carrier 21 has a rotor carrier flange 22 that is flared outwards in the radial direction R. The rotor carrier flange 22 is arranged in the axial direction between the rotor 16 on the one hand and the torque converter and/or the converter lockup clutch 50 on the other hand. The rotor carrier flange 22 has cutouts 23 distributed in the circumferential direction U, which correspond to corresponding cutouts extending in the axial direction A in the rotor 16 and in a housing of the torque converter or the converter lockup clutch 50, in order to ensure a non-rotatable connection of the hybrid module 1 to to enable the torque converter or the converter lock-up clutch 50 . For this purpose, for example, a screw connection takes place by means of bolts which extend from the input side 2 through the rotor 16 and the rotor carrier flange 22 into the housing of the torque converter or the converter lockup clutch 50 .

The rotor web 20 is connected to the counter-pressure plate 24 in a rotationally fixed manner in the region of the input-side end of the rotor carrier 21 . Furthermore, the rotor web 20 is connected by a rotor bearing 18 stationary and rotatable in the axial direction A on a support wall 17 directly or indirectly supporting the stator 15 of the electric motor 6 . For this purpose, the rotor web 20 has a collar section in the region of the bearing, on the inside of which the axial and radial bearing 11 is arranged and on the outside of which the rotor bearing 18 is arranged. The stator 15 is either connected directly to the support wall 17 or is connected to a housing component which in turn is connected to the support wall 17 .

The pressure plate 27 is in contact with a pressure pot 28 of a concentric hydraulic actuating device 29 rotating with the rotor carrier 21 for engaging and/or disengaging the separating clutch 7 . The actuating device 29 can be supported on the torque converter or the converter lockup clutch 50 . Alternatively or additionally, the actuating device 29 can be supported on the transmission shaft 49 . In any case, it is advantageous if the oil supply to the actuating device 29 takes place via the transmission shaft 49 .

The input side clutch disk assembly 33 includes at least the first clutch disk 34 and the second clutch disk 35 . Both clutch discs 34, 35 are non-rotatable and fixed to the flange 10 in the axial direction A of the clutch disc assembly 33 or of the hybrid module 1. The first clutch disk 34 can be frictionally clamped between the counter-pressure plate 24 and the intermediate pressure plate 26 . The second clutch disk 35 can be frictionally clamped between the intermediate pressure plate 26 and the pressure plate 27 .

Both clutch discs 34, 35 each have a spring device 36, 37 acting in the axial direction A. The spring device 36 of the first clutch disk 34 has openings 40 spaced apart in the circumferential direction U of the clutch disk assembly 33 or of the hybrid module 1 . Axial sections of the spring device 37 of the second clutch disk 35 extend in the axial direction A through the openings 40 .

To put it more precisely, the first clutch disk 34 is non-rotatably connected via at least one first spring plate 38 as the first spring device 36 and is connected elastically in the axial direction A to the flange 10 . Friction linings 43 are connected in a torque-proof manner on both sides of the first spring plate 38 in order to be able to come into frictional contact with the friction surfaces of the counter-pressure plate 24 and the intermediate pressure plate 26 . The first spring plate 38 has the openings 40 spaced apart in the circumferential direction U. The second spring device 37 has at least spacer bolts 42 as axial sections, a pad carrier ring 41 and a second spring plate 39 . The lining carrier ring 41 is arranged on one side of the first spring plate 38 , while the second spring plate 39 is arranged on the other side of the first spring plate 38 . The spacer bolts 42 connect an inner area of the lining carrier ring 41 to an outer area of the second spring plate 39 through the openings 40 in the first spring plate 38 . In the outer area of the lining carrier ring 41 , friction linings 43 are attached in a rotationally fixed manner on both sides of the lining carrier ring 41 in order to be able to come into frictional contact with the friction surfaces of the intermediate pressure plate 26 and the pressure plate 27 . All in all, the friction linings 43 of the second clutch disc 35 are arranged on one side of the first spring plate 38, while the second spring plate 39 of the second spring device 37 for elastic connection in the axial direction A to the flange 10 of the input shaft 8 is on the other side of the first spring plate 38 is arranged.

The two spring plates 38, 39 are connected to the flange 10 on different sides of the flange 10 in the axial direction A. The connection is preferably made by riveting. At this point it should be pointed out that the separating clutch 7 can also be designed as a single-plate clutch, so that at least one of the clutch plates 34 or at least one spring device 36, 37 is non-rotatably and elastically connected to the flange 10 of the input shaft 8 in the axial direction A.

The exemplary embodiment of the hybrid module 1 illustrated in FIG. 2 differs from the exemplary embodiment of the hybrid module 1 illustrated in FIG. 1 in that the input shaft 8 is designed to be shorter overall. The flange 10 of the input shaft 8 forms the transmission-side end 14 of the input shaft 8. The input shaft 8 is rotatably mounted with respect to the support wall 17 of the electric motor 6, which directly or indirectly supports the stator 15, and is designed without axial and radial bearings in the axial direction A within the rotor 16 . This means that the end 14 of the input shaft 8 on the transmission side does not extend into the transmission shaft 49 in contrast to the exemplary embodiment of the hybrid module 1 illustrated in FIG.

In the exemplary embodiment of the hybrid module 1 illustrated in FIG. 2, the input shaft 8 is rotatably supported on the rotor web 20 of the electric motor 6 exclusively by means of an axial and radial bearing 11 . The rotor web 20 is supported on the supporting wall 17 by means of the rotor bearing 18 in a rotatable manner. The axial and radial bearing 11 of the input shaft 8 overlaps in the axial direction A with the center of gravity of the input shaft 8. It should be noted that the separating clutch 7 of the hybrid module 1 shown in Figure 2 is designed as a two-disc or multiple-disk clutch, but the separating clutch 7 is also a single-disc clutch with a counter-pressure plate 24 that is stationary in the axial direction A and a counter-pressure plate 24 that can be displaced to a limited extent in the axial direction A Pressure plate 27 and a single between the counter-pressure plate 24 and the pressure plate 27 arranged in the axial direction A clutch disc can be formed.

The exemplary embodiment of the hybrid module 1 shown in FIG. 3 can also be constructed in the same way. The embodiment of the hybrid module 1 shown in Figure 3 differs from the embodiment of the hybrid module 1 shown in Figure 2 in that the input shaft 8 is extended in the direction of the input side 2 of the hybrid module 1, i.e. in the direction of the internal combustion engine 4, and on its internal combustion engine side End 13 has a pilot bearing 12, preferably on the outer circumference of the input shaft 8. By means of the pilot bearing 12 , the input shaft 8 can be rotatably supported, for example, on an input flange of the input-side torsional vibration damper 5 or on another component that is non-rotatably connected to the crankshaft of the internal combustion engine 4 . In particular, the input shaft 8 can be rotatably mounted on the crankshaft of the internal combustion engine 4 by means of the pilot bearing 12 . As a result, it may be that the axial and radial bearing 11 of the input shaft 8 no longer overlaps with the center of gravity of the input shaft 8 in the axial direction A.

In the exemplary embodiment illustrated in FIG. 4, the counter-pressure plate 24 of the separating clutch 7 forms the rotor web 20, through which the rotor 16 of the electric motor 6 is rotatably supported with respect to the stator 15 of the electric motor 6. More precisely, the counter-pressure plate 24 forming the rotor web 20 is supported on the support wall 17 by means of the rotor bearing 18 so that it can rotate. The rotor web designed as a counter-pressure plate 24 is connected in the radial direction R outside the clutch disks 34, 35 to the rotor carrier 21 or, as shown in Figure 4, merges into the rotor carrier 21, i.e. it is preferably in one piece with the rotor carrier 21 educated. The rotor 16 of the electric motor 6 is formed on the outside of the rotor carrier 21 in a rotationally fixed manner with the rotor carrier 21 . The pressure plate 27 and/or the intermediate pressure plate 26 is/are connected to the rotor carrier 21 or to the rotor web 20 in a rotationally fixed manner via leaf springs 30 on the inside of the rotor carrier 21 . The separating clutch 7 of the hybrid module 1 shown in FIG. 4 can be designed both as a single-disk clutch and as a two- or multi-disk clutch, even if only a single clutch disk 34 is shown in FIG. The same applies to the exemplary embodiment of the separating clutch 7 of the hybrid module 1 shown in FIGS. 5 and 6.

The separating clutch 7 of the hybrid module 1 shown in Figures 5 and 6 has at least two pressure plates 24, 26, 27, of which at least one pressure plate 26, 27 is connected non-rotatably by leaf springs 30 within the rotor carrier 21 by means of rivet connections 31 and in the axial direction A of the hybrid module 1 on the other pressure plate 24,

26 is too movable to frictionally clamp the clutch disc 34,35 between the pressure plates 24,26,27. The rivet connections 31 limit an engagement path of the pressure plate 26, 27 before a wear limit of the clutch disc 34, 35 is reached. The wear limit of the clutch disk 34, 35 is reached when the friction lining 43 of the clutch disk 34, 35 has the same height H as a head 45 of a rivet 44 with which the friction lining 43 is riveted to the spring device 36, 37 of the clutch disk 34, 35 . In particular, a head 32 of the riveted connection 31 of the leaf spring 30 can be brought into contact with the other pressure plate 24, 26 or with an element that is fixed with respect to the rotor carrier 21 in order to limit the engagement path of the one pressure plate 26, 27.

One pressure plate 26, 27 can be designed as a pressure plate 27 and the other pressure plate 24, 26 as a counter-pressure plate 24, which is fixed in the axial direction A, of the single- or multi-disc separating clutch 7. Alternatively, one pressure plate 26 , 27 can be designed as a pressure plate 27 and the other pressure plate 24 , 26 can be designed as an intermediate pressure plate 26 of the multi-disc separating clutch 7 . Alternatively, the one pressure plate 26,

27 as an intermediate pressure plate 26 and the other pressure plate 24, 26 as a counter-pressure plate 24 of the multi-disc separating clutch 7 that is fixed in the axial direction A.

A method for assembling the clutch disk assembly 33 for the multi-disc separating clutch 7 of the hybrid module 1 is shown in FIGS. 7a to 7c. The first clutch disc 34 has a first imbalance 46 . The second clutch disk 35 has a second imbalance 47 . The two clutch discs 34, 35 are twisted relative to one another in such a way that the total imbalance 48 formed from the first and second imbalance 46, 47 is minimal. The two clutch discs 34, 35 with a minimal total imbalance 48 are fixed in a rotationally fixed manner and in the axial direction A of the clutch disc assembly 33 or of the hybrid module 1 on the flange 10. In particular, it is advantageous if the openings 40, which are provided in the spring device 36 of the first clutch disk 34, are evenly spaced from one another in the circumferential direction U by an angular dimension and the axial sections of the spring device 37 of the second clutch disk 35 are aligned with one another in the circumferential direction U with the are evenly spaced by the same angle, so that both clutch discs 34, 35 can be assembled rotated relative to one another by integer multiples of the angle when they are assembled. Then the first clutch disc 34 with its first imbalance 46 and the second clutch disc 35 with its second imbalance 47 are assembled twisted relative to one another in such a way that the total imbalance 48 formed from the first and second imbalance 46, 47 is minimal, as shown in FIG. 7c.

The previous exemplary embodiments relate to a hybrid module 1 for coupling and decoupling an internal combustion engine 4 to and from a drive train of a motor vehicle, with an electric motor 6 and a separating clutch 7, which is arranged in the radial direction R of the hybrid module 1 within the electric motor 6, and the a counter-pressure plate 24, a pressure plate 27 which can be displaced to a limited extent in the axial direction A of the hybrid module 1 and an intermediate pressure plate 26 which is arranged between the counter-pressure plate 24 and the pressure plate 27 and can be displaced to a limited extent in the axial direction A, and which can be clamped with a friction fit between the counter-pressure plate 24, intermediate pressure plate 26 and pressure plate 27 Has clutch discs 34, 35, the electric motor 6 having a rotor 16 which is rotatably supported by a rotor bar 20 with respect to a stator 15 of the electric motor 6, the rotor bar 20 in the radial direction R outside the clutch discs 34, 35 having a rotor carrier 21 or merges into a rotor carrier 21, on the outside of which the rotor 16 is configured to be non-rotatable with the rotor carrier 21, with the pressure plate 27 and/or the intermediate pressure plate 26 being non-rotatably connected via leaf springs 30 on the inside of the rotor carrier 21 to the rotor carrier 21 or to is/are connected to the rotor web 20 or to the counter-pressure plate 24 .

In addition, the previous exemplary embodiments relate to a hybrid module 1 for coupling and decoupling an internal combustion engine to and from a drive train of a motor vehicle, with an electric motor 6 and a separating clutch 7, which is arranged in the radial direction R of the hybrid module 1 within the electric motor 6, and which has a counter-pressure plate 24, a pressure plate 27 that can be displaced to a limited extent in the axial direction A of the hybrid module 1, and at least one clutch disk 34, 35 that can be frictionally clamped between the counter-pressure plate 24 and the pressure plate 27, the clutch disk 34, 35 in the axial direction A within a rotor 16 of the electric motor 6 is rotatably connected to an input shaft 8 of the hybrid module 1, and the input shaft 8 is rotatably mounted with respect to a support wall 17 of the electric motor 6 that directly or indirectly carries a stator 15 and is mounted in the axial direction A is formed within the rotor 16 without axial and radial bearings.

In addition, the preceding exemplary embodiments relate to a clutch disk assembly 33 for a multi-disc separating clutch 7 of a hybrid module 1 for coupling and decoupling an internal combustion engine 4 to and from a drive train of a motor vehicle, with at least one first clutch disk 34 and at least one second clutch disk 35, both of which are non-rotatable and are firmly attached to a flange 10 in the axial direction A of the clutch disc assembly 33, and both of which have a spring device 36, 37 that is effective in the axial direction A, the spring device 36 of the first clutch disc 34 having openings 40 spaced apart in the circumferential direction U of the clutch disc assembly 33 , through which axial sections of the spring device 37 of the second clutch disc 35 extend in the axial direction A.

In addition, the previous exemplary embodiments relate to a method for assembling a clutch disk assembly 33 for a multi-disc separating clutch 7 of a hybrid module 1 for coupling and decoupling an internal combustion engine 4 to and from a drive train of a motor vehicle, with at least one first clutch disk 34 having a first imbalance 46 and at least one second clutch disc 35, which has a two imbalance 47, the two clutch discs 34, 35 being twisted relative to one another in such a way that the total imbalance 48 formed from the first and second imbalance 46, 47 is minimal, and the two clutch discs 34, 35 with a minimum total unbalance 48 in a rotationally fixed manner and in the axial direction A of the clutch disc assembly 33 are fixed to a flange 10 .

In addition, the previous exemplary embodiments relate to a hybrid module 1 for coupling and decoupling an internal combustion engine 4 to and from a drive train of a motor vehicle, with an electric motor 6 and a separating clutch 7, which is arranged in the radial direction R of the hybrid module 1 within the electric motor 6. and which has a counter-pressure plate 24, a pressure plate 27 that can be displaced to a limited extent in the axial direction A of the hybrid module 1 and an intermediate pressure plate 26 that is arranged between the counter-pressure plate 24 and the pressure plate 27 and can be displaced to a limited extent in the axial direction A, and between counter-pressure plate 24, intermediate pressure plate 26 and pressure plate 27 has frictionally clampable clutch disks 34, 35, the electric motor 6 having a rotor 16 which is rotatably supported by a rotor bar 20 with respect to a stator 15 of the electric motor 6, the counter-pressure plate 24 forming the rotor bar 20.

In addition, the previous exemplary embodiments relate to a hybrid module 1 for coupling and decoupling an internal combustion engine 4 to and from a drive train of a motor vehicle, with an electric motor 6 and a separating clutch 7, which is arranged in the radial direction R of the hybrid module 1 within the electric motor 6. and which has at least two pressure plates 24, 26, 27, of which at least one pressure plate 26, 27 is connected by leaf springs 30 within a rotor carrier 21, on the outside of which a rotor 16 of the electric motor 6 is configured to be non-rotatable with the rotor carrier 21, by means of rivet connections 31 in a non-rotatable manner and is movable in the axial direction A of the hybrid module 1 towards the other pressure plate 24, 26 in order to frictionally clamp a clutch disc 34, 35 between the pressure plates 24, 26, 27, the rivet connections 31 providing an engagement path of the one pressure plate 26, 27 limit before a wear limit of the clutch disc 34, 35 is reached.

Reference character list

P2 hybrid module

entry page

exit page

combustion engine

Torsional vibration damper on the input side

electric motor

disconnect clutch

input shaft

Input shaft splines

Input shaft flange

Thrust and radial bearings

Pilot bearing, combustion engine end, transmission end

stator

rotor

retaining wall

rotor bearings

transmission shaft bearing

rotor bar

rotor carrier

rotor carrier flange

recesses

counter-pressure plate / pressure plate

intermediate element

Intermediate pressure plate / pressure plate

pressure plate / pressure plate

pressure pot

actuating device

leaf springs

rivet connection

head of the rivet joint

Clutch disc assembly first clutch disc second clutch disc 36 first spring device 37 second spring device 38 first spring plate 39 second spring plate 40 openings in the first spring plate 41 pad carrier ring

42 spacer bolt 43 friction lining 44 rivet 45 head 46 first imbalance 47 second imbalance

48 Total imbalance 49 Transmission shaft 50 Converter lock-up clutch H Height D Axis of rotation A Axial direction

R Radial direction U Circumferential direction

Claims

- 23 -

Hybrid module (1) for coupling and decoupling an internal combustion engine (4) to and from a drive train of a motor vehicle, with an electric motor (6) and a separating clutch (7), which in the radial direction (R) of the hybrid module (1) inside of the electric motor (6), and one counter-pressure plate (24), a pressure plate (27) that can be displaced to a limited extent in the axial direction (A) of the hybrid module (1) and at least one clutch disc that can be clamped with a friction fit between the counter-pressure plate (24) and the pressure plate (27). (34, 35), the clutch disc (34, 35) being non-rotatably connected in the axial direction (A) within a rotor (16) of the electric motor (6) to an input shaft (8) of the hybrid module (1), and the input shaft (8) is rotatably mounted with respect to a support wall (17) of the electric motor (6) directly or indirectly supporting a stator (15) and is designed without axial and radial bearings in the axial direction (A) within the rotor (16). Hybrid module (1) according to Claim 1, in which the input shaft (8) is rotatably supported on a rotor web (20) of the electric motor (6) by means of an axial and radial bearing (11), and the rotor web (20) is supported by means of a rotor bearing (18 ) rotatably supported on the support wall (17). Hybrid module (1) according to claim 2, wherein the axial and radial bearing (11) of the input shaft (8) overlaps in the axial direction (A) with the center of gravity of the input shaft (8). Hybrid module (1) according to claim 2 or 3, wherein the counter-pressure plate (24) forms the rotor web (20). Hybrid module (1) according to one of Claims 2 to 4, the rotor web (20) being connected to a rotor carrier (21) in the radial direction (R) outside the clutch disc (34, 35) or merging into a rotor carrier (21). the outside of which the rotor (16) is designed to be non-rotatable with the rotor carrier (21). Hybrid module (1) according to claim 5, wherein the rotor carrier (21) and / or the rotor (16) in the circumferential direction (U) of the hybrid module (1) distributed arranged recesses (23) has / have, through which the hybrid module (1) with a torque converter and/or a converter lock-up clutch (50) can be connected in a torque-proof manner, in particular is connected. Hybrid module (1) according to claim 5 or 6, wherein the pressure plate (27) is connected to the rotor support (21) or to the rotor web (20) in rotation via leaf springs (30) on the inside of the rotor support (21). Hybrid module (1) according to one of Claims 5 to 7, the pressure plate (27) being connected to a pressure pot (28) of a concentric hydraulic actuating device (29) rotating with the rotor carrier (21) for engaging and/or disengaging the separating clutch (7) is in annex. Hybrid module (1) according to one of Claims 1 to 8, wherein an end (13) of the input shaft (8) on the internal combustion engine side has a pilot bearing (12), by means of which the input shaft (8) can be rotatably mounted on a crankshaft of the internal combustion engine (4). Hybrid module (1) according to one of Claims 1 to 9, in which the input shaft (8) has a flange (10) on which the clutch disc (34, 35) is rotationally fixed via at least one spring device (36, 37) and is supported in the axial direction (A ) is elastically attached.