阅读说明：本技术 混合动力模块 (Hybrid module ) 是由 R·魏森博恩 P·施特拉塞尔 于 2020-07-17 设计创作，主要内容包括：规定了一种用于以减振方式将内燃机(12)耦合到机动车动力总成系统(10)上的混合动力模块(28),带有一个可与所述内燃机(12)驱动轴(14)耦合的扭振减振器(16),其用于抑制通过所述驱动轴(14)引入的转动不平衡,一个用于将所述扭振减振器(16)与中间轴(20)耦合的分离离合器(18),一个与所述中间轴(20)以抗扭转方式耦合的电机(26)转子(22),所述电机用于机动车的电动驱动,以及一个用于容纳与所述转子(22)共同发挥作用的电机(26)定子(24)的壳体(60),其中,所述中间轴(20)支承在所述壳体(60)上。通过将所述中间轴(20)支承在所述支撑着所述电机(26)定子(24)的壳体(60)上实现一个紧凑的、节省结构空间的结构,进而可以根据狭窄的结构空间条件以节省结构空间的方式调整所述混合动力模块(28)。(A hybrid module (28) for coupling an internal combustion engine (12) to a motor vehicle drive train (10) in a vibration-damped manner is specified, comprising a torsional vibration damper (16) which can be coupled to a drive shaft (14) of the internal combustion engine (12) and is used to damp a rotational imbalance introduced by the drive shaft (14), a separating clutch (18) for coupling the torsional vibration damper (16) to an intermediate shaft (20), a rotor (22) of an electric machine (26) which is coupled to the intermediate shaft (20) in a rotationally fixed manner and is used for the electric drive of the motor vehicle, and a housing (60) for accommodating a stator (24) of the electric machine (26) which interacts with the rotor (22), wherein the intermediate shaft (20) is mounted on the housing (60). A compact, space-saving construction is achieved by mounting the intermediate shaft (20) on the housing (60) supporting the stator (24) of the electric machine (26), so that the hybrid module (28) can be adjusted in a space-saving manner according to narrow installation space conditions.)

1. Hybrid module for the vibration-damped coupling of an internal combustion engine (12) to a drive train (10) of a motor vehicle, having

A torsional vibration damper (16) couplable to a drive shaft (14) of said internal combustion engine (12) for damping rotational imbalances introduced through said drive shaft (14),

a separating clutch (18) for coupling the torsional vibration damper (16) to an intermediate shaft (20),

a rotor (22) of an electric machine (26) which is coupled in a rotationally fixed manner to the intermediate shaft (20) and is used for the electric drive of a motor vehicle, and

a housing (60) for accommodating a stator (24) of the electric machine (26) which interacts with the rotor (22),

wherein the intermediate shaft (20) is supported on the housing (60),

in particular, the housing (60) is designed in one piece at least by means of a radially inwardly facing connecting region (58) for fastening the stator (24) to a journal (62) for mounting the intermediate shaft (20).

2. Hybrid module according to claim 1, characterized in that the rotor (22) is mounted on the housing (60), wherein in particular the rotor (22) has a connecting plate (54) for rotationally fixed coupling with the intermediate shaft (20), and the connecting plate (54) has a curved step structure (70) for supporting a rotor bearing (68), in particular designed as a rolling bearing.

3. Hybrid module according to claim 2, characterized in that the housing (60) has a housing hub (66) which projects in the axial direction, wherein the intermediate shaft (20) is supported on the radially inwardly facing inner side of the housing hub (66) and the rotor (22) is supported on the radially outwardly facing outer side of the housing hub (66).

4. Hybrid module according to one of claims 1 to 3, characterized in that the input or output of the torsional vibration damper (16) is supported on the intermediate shaft (20).

5. Hybrid module according to one of claims 1 to 4, characterized in that an actuating system (52), in particular hydraulically actuatable, is provided for actuating the separating clutch (18), wherein the actuating system (52) is supported on the countershaft (20) or on the rotor (22).

6. Hybrid module according to one of claims 1 to 5, characterized in that the rotor (22) and the stator (24) of the electric machine (26) are arranged coaxially with the intermediate shaft (20), wherein in particular the rotor (22) and the stator (24) are arranged at least partially in one common axial region with an operating system (52) for operating the separating clutch (18).

7. Hybrid module according to one of claims 1 to 6, characterized in that the rotor (22) and the stator (24) of the electric machine (26) face the axial side of the housing (60) directed toward the separating clutch (18).

8. Hybrid module according to one of claims 1 to 7, characterized in that the rotor (22) and/or the stator (24) of the electric machine (26) is arranged in the axial direction directly next to the torsional vibration damper (16) or in a manner decoupled solely by the operating system (52) hydraulic line (50), wherein in particular the decoupling clutch (18) is arranged at least partially in the inner radial direction of the rotor (22) and/or the stator (24) of the electric machine (26) and/or at least partially in the radial region in the inner radial direction of the torsional vibration damper (16).

9. Hybrid module according to one of claims 1 to 8, characterized in that the torsional vibration damper (16) has a dual mass flywheel and/or a centrifugal pendulum.

10. Hybrid module according to one of claims 1 to 9, characterized in that the torsional vibration damper (16) has a primary mass (30) which can be coupled to the drive shaft (14) of the internal combustion engine (12) and a secondary mass (38) which can be coupled to the primary mass (30) in a relatively torsion-limited manner via an energy storage element (36) which is designed in particular as a curved damping spring, wherein the separating clutch (18) has a pressure plate (46) which can be moved axially toward a top plate (44) (formed integrally from the secondary mass (38)) and a clutch disk (48) which can be pressed in a friction-fit manner between the top plate (44) and the pressure plate (46) and is coupled in a torsion-resistant manner to the intermediate shaft (20).

Technical Field

The invention relates to a hybrid module, by means of which an internal combustion engine can be coupled to a drive train of a hybrid vehicle in a torsional vibration damping manner.

Background

A hybrid module for a motor vehicle drive-train is known from DE 102009059944 a1, in which a wet multiplate clutch of the hybrid module is arranged in the torque flow between an internal combustion engine and an electric machine arranged coaxially with the hybrid module.

The hybrid module always needs to be adjusted according to narrow structural space conditions in a manner that saves structural space as much as possible.

Disclosure of Invention

The aim of the invention is to specify corresponding measures for adjusting a hybrid module in a space-saving manner according to narrow installation space conditions.

According to the invention, this object is achieved by a hybrid module having the features of claim 1. Preferred embodiments of the invention are given in the dependent claims and in the subsequent description, which are able to demonstrate the inventive aspects, individually or in combination.

According to the invention, a hybrid module for the vibration-damped coupling of an internal combustion engine to a drive train of a motor vehicle is specified, comprising a torsional vibration damper which can be coupled to a drive shaft of the internal combustion engine and is used to damp a rotational imbalance introduced by the drive shaft, a decoupling clutch for coupling the torsional vibration damper to an intermediate shaft, a rotor of an electric machine which is coupled to the intermediate shaft in a rotationally fixed manner and is used for the electric drive of the motor vehicle, and a housing for accommodating a stator of the electric machine which interacts with the rotor, wherein the intermediate shaft is supported on the housing, wherein in particular the housing is designed in one piece at least by means of a radially inward-facing connection region for fixing the stator to a journal for supporting the intermediate shaft.

If the housing also supports the stator of the coaxially arranged electric machine, the intermediate shaft is simultaneously supported. The housing is understood here to mean a component of the type: the stator of the electrical machine can be fixed on said member from the inner radial direction. The intermediate shaft can be supported in direct contact with the housing, for which purpose a plain bearing is provided between the intermediate shaft and the housing, or indirectly via an intermediate bearing, for example designed as a rolling bearing. By mounting the intermediate shaft on the housing, a hollow shaft can be saved which is placed over the intermediate shaft and which has to be firmly fixed to the housing by means of separate fastening elements or has to be mounted on the housing in a relatively rotatable manner by means of a further bearing. In addition, it is possible to save an intermediate separate component which must first be connected to the housing in order to support and/or support the intermediate shaft on the housing. This makes it possible to reduce the number of components and the installation space requirement. The housing can be designed in one piece at least by means of a radially inward-facing connecting region for fastening the stator to a journal for supporting an intermediate shaft. The following knowledge is to be fully utilized here, namely: it is advantageous for the electrical output of the electric machine if the rotor and the stator are arranged as far as possible radially outward within the limits of the specified installation space, in order to be able to insert further functional units of the hybrid module into the electric machine and to implement a sleeve-type design, for which purpose a housing with a complex design is not required at all in practice, and therefore a multi-part construction is not required for implementing this design. For example, the separating clutch and/or the actuating system for actuating the separating clutch can be arranged radially inside the electric machine, at least partially in an axial region common to the electric machine, wherein in particular the housing can have a simple, substantially L-shaped trough-shaped half-section. The intermediate shaft is supported on the housing supporting the stator of the electric machine in order to achieve a compact, space-saving construction, so that the hybrid module can be adjusted according to the narrow construction space conditions in a space-saving manner.

The motor rotor may have a permanent magnet coupled to the coupling disc. The coupling plate can be connected to the intermediate shaft in a rotationally fixed manner, for example by means of a toothing. The rotor disk can have a region projecting in the axial direction for the permanent magnets for fastening and a hub for fastening with the intermediate shaft. The motor stator may have electromagnets that can function together with the rotor permanent magnets. The electromagnets can be combined into individual structural units, which can each be connected to the housing in a radially inwardly facing connecting region of the housing. The housing may have a housing hub for forming a journal.

In particular, the rotor is mounted on the housing, wherein in particular the rotor has a connecting disk for rotationally fixed coupling with the intermediate shaft, and the connecting disk has a curved stepped structure for supporting a rotor bearing, in particular designed as a rolling bearing. In particular, the extension direction of the connecting disc can be largely substantially parallel to a part of the housing which is substantially in a radial plane. The curved course of the connecting disk can easily form a stepped structure, into which a rotor bearing, in particular designed as a rolling bearing, can be inserted. The rotor bearing is thereby positioned as intended in the radial direction and in the axial direction on the connection disk of the rotor. The rotor bearing can be supported on the housing, in particular on a flange formed by the housing, with its side facing away from the connection disk or with its side facing the connection disk

Preferably, the housing has a housing hub which projects in the axial direction, the intermediate shaft being supported on the radially inwardly facing inner side of the housing hub and the rotor being supported on the radially outwardly facing outer side of the housing hub. The housing hub can be designed as a tube which projects axially from the rest of the housing and whose two jacket surfaces have a bearing action. This allows a tilt-free mounting of the intermediate shaft and the rotor in a very small installation space. In this case, the rotor bearing for supporting the rotor and the bearing for supporting the intermediate shaft can be arranged, in particular, at least partially in a common axial region or axially offset from one another.

In particular, it is advantageous if the input or output of the torsional vibration damper is mounted on the intermediate shaft. The torsional vibration damper can thus be mounted on the intermediate shaft without tilting, and the accuracy and stability of the hybrid module are improved. Since the intermediate shaft is also supported and supported on the housing, the forces occurring in the torsional vibration damper can be easily transmitted to the housing via the intermediate shaft without affecting the other functional units of the hybrid module.

In particular, a set of, in particular hydraulically, actuating systems for actuating the separating clutch is provided, wherein the actuating systems are supported on the countershaft or on the rotor. The actuating system can in principle be designed as a clutch lever with a fixed cover, which can be fastened firmly to a clutch cover or to a stationary component, such as a motor housing, for example. For additional support of the forces occurring, namely: spaced from the attachment point of the operating system designed as a cover-fixed clutch lever and/or when the operating system is of a design that can be rotated together, the operating system can be supported and braced. If there is sufficient axial installation space between the clutch disk intermediate shaft of the anti-rotation securing device "disconnect clutch" and the rotor intermediate shaft of the anti-rotation securing device "rotor intermediate shaft", the operating system can be supported and supported directly on the intermediate shaft by means of the support bearing. In particular, when the rotor is connected to the intermediate shaft in a rotationally fixed manner via the hub, the operating system can also be supported and braced on the jacket surface of the rotor hub facing away from the intermediate shaft, so that the intermediate shaft can be designed to be correspondingly short, and the axial installation space can be saved.

Preferably, the rotor and the stator of the electric machine are arranged coaxially with the intermediate shaft, wherein in particular the rotor and the stator are arranged at least partially in an axial region which is common to an actuating system for actuating the separating clutch. By arranging the electric machine coaxially at a position as far as possible radially outwards, a nested design of the operating system and the electric machine can be easily achieved, and the operating system can be at least partially inserted into the electric machine by means of an axial relative movement during installation. This allows the axial installation space requirement to be kept low.

As a particular preference, the rotor and the stator of the electric machine are directed toward the axial side of the separating clutch facing the housing. The electric machine is therefore arranged on the engine side of the housing, but not on the transmission side, or in a substantially radially extending partial region of the housing. The housing can thus cover the electric machine axially and also the entire hybrid module. The torsional vibration damper can cover the other axial sides of the hybrid module, for example, on the basis of a flywheel which can be connected to the drive shaft of the internal combustion engine, so that the functional components of the hybrid module can be easily protected from external influences in a space-saving manner.

In particular, the rotor and/or the stator of the electric machine is arranged in the axial direction directly adjacent to the torsional vibration damper or separated only by means of an operating system hydraulic line, wherein in particular the separating clutch is arranged at least partially in the inner radial direction of the rotor and/or the stator of the electric machine and/or at least partially in the radial region in the inner radial direction of the torsional vibration damper. By bringing the electric machine or the machine housing axially close to the torsional vibration damper, a sufficient protection of the functional components of the hybrid module against external influences from the radial direction can be easily achieved in a space-saving manner. In addition, the separating clutch and, if appropriate, the actuating system can also be arranged at a radially inner position, as a result of which a space-saving sleeve-in construction is achieved, which in turn results in a lower axial construction space requirement.

Preferably, the torsional vibration damper has a dual mass flywheel and/or a centrifugal pendulum. Thereby, a rotational imbalance caused by engine combustion in an internal combustion engine, which is designed especially as an internal combustion engine, can be sufficiently suppressed. The dual-mass flywheel can have an input primary mass, which is coupled to a drive shaft of the internal combustion engine, in particular designed as a crankshaft, and an output secondary mass, which is coupled to the input primary mass in a rotationally limited manner via an energy storage element. The primary mass and the secondary mass, which is coupled to the primary mass in a torsion-limited manner by means of an energy storage element, which is designed in particular as a curved damper spring, can form a set of mass spring systems which can suppress a rotational imbalance in the rotational speed and the torque of the drive power generated by the motor vehicle engine in a specific frequency range. In this case, the moments of inertia of the primary mass and/or the secondary mass and the spring characteristic of the energy storage element can be selected in such a way that: the vibration can be damped in the frequency range of the main engine unit of the motor vehicle engine. In particular, the moment of inertia of the primary mass and/or the secondary mass can be influenced by the installation of additional masses. The primary mass can have a disk with which the cover can be connected, so that a substantially annular installation space can be defined for the energy storage element. The primary mass can be attached to the energy storage element in the tangential direction, for example, by means of a projection which projects into the installation space. An outlet flange of the secondary mass can project into the installation space and be fastened tangentially to the end of the energy storage element opposite.

The centrifugal pendulum may have a pendulum mass which is guided in a pendulum-like manner on a support flange, wherein in particular the support flange may be formed by the primary or secondary mass of a torsional vibration damper dual-mass flywheel. At least one pendulum mass of the centrifugal pendulum is intended to be moved under the influence of centrifugal force to a position which is as far away from the center of rotation as possible. The null is the position which is furthest in the radial direction from the centre of rotation and which the pendulum mass can occupy radially outside. At a constant drive speed and drive torque, the pendulum mass will occupy this radially outer position. When the rotational speed fluctuates, the pendulum mass will deflect along its pendulum path based on its inertia. The pendulum mass can thereby be pushed in the direction of the center of rotation. The centrifugal force acting on the pendulum mass is thus divided into a component in the tangential direction of the pendulum path and a further component in the normal direction. The tangential force component provides a restoring force which brings the pendulum mass back to its zero position, while the normal force component acts on a force-introducing element for introducing rotational speed fluctuations, for example a flywheel connected to the drive shaft of the motor vehicle engine, and generates a reaction torque for counteracting the rotational speed fluctuations and damping the introduced rotational speed fluctuations. When the rotating speed fluctuation is particularly strong, the pendulum mass can reach the maximum vibration attenuation amplitude and reach the radially farthest inner position. For this purpose, the rails provided in the support flange and/or the pendulum mass have suitable curved surfaces in which a coupling element, in particular designed as a roller, can be guided. Preferably, at least two rollers are provided, which are guided by a guide rail of the support flange and a pendulum path of the pendulum mass. In particular, a plurality of pendulum masses is provided. Preferably, the pendulum masses are guided in the circumferential direction with a uniform distribution on the support flange. The inertial mass of the pendulum mass and/or the relative movement of the pendulum mass with respect to the support flange are designed to suppress rotational imbalances, in particular of the motor vehicle engine assembly, in a specific frequency range. In particular, several pendulum masses and/or several support flanges are provided. For example, two pendulum masses are provided, which are connected by means of pins or rivets, in particular designed as spacer pins, between which a support flange is positioned in the axial direction of the torsional vibration damper. Alternatively, two, in particular substantially Y-shaped, connected supporting flange parts can also be provided, between which the pendulum mass is positioned.

In a particularly preferred embodiment, the torsional vibration damper has a primary mass which can be coupled to the drive shaft of the internal combustion engine and a secondary mass which can be coupled to the primary mass in a relatively torsion-limited manner via an energy storage element, which is designed in particular as a curved damper spring, wherein the separating clutch has a pressure plate which can be moved axially toward the top plate (which is formed in one piece from the secondary mass) and a clutch disk which can be pressed in a friction-fit manner between the top plate and the pressure plate and is coupled in a rotationally fixed manner to the intermediate shaft. The secondary mass itself thus forms the head plate of the separating clutch, so that a separate head plate and thus an axial installation space can be saved. Preferably, the secondary mass is supported radially inwardly and/or is placed centrally on the primary mass and/or the countershaft, so that the secondary mass extends in any case over the entire radial region in which the clutch disk friction linings are also arranged. For example, in order to form the head plate on its axial side facing the clutch disk, the secondary mass can be roughened and/or engraved in the region of the friction disks of the clutch disk, in order to be able to provide a correspondingly high friction force.

Drawings

The invention is described below with reference to the accompanying drawings, which illustrate preferred embodiments, wherein the features described below are able to show aspects of the invention both individually and in combination. Brief description of the drawings:

FIG. 1: a schematic diagram of a powertrain system of a hybrid motor vehicle, and

FIG. 2: a schematic cross-sectional view of a hybrid module for use in the powertrain system of fig. 1.

Description of the reference numerals

10 powertrain system 12 internal combustion engine 14 drive shaft 16 torsional vibration damper 18 disconnect clutch 20 intermediate shaft 22 rotor 24 stator 26 motor 28 hybrid module 30 primary mass 32 cover 34 mounting space 36 energy storage element 38 secondary mass 40 sealing element 42 belleville spring 44 top plate 46 pressure plate 48 clutch disc 50 hydraulic conduit 52 operating system 54 disc 56 hub 58 connection area 60 housing 62 bearing 64 journal 66 housing hub 68 rotor bearing 70 stepped structure 72 clutch cover.

Detailed Description

The drive train 10 of the hybrid vehicle shown in fig. 1 has an internal combustion engine 12, which is designed as an internal combustion engine, whose drive shaft 14, which is designed as a crankshaft, is connected to a torsional vibration damper 16. The torsional vibration damper 16 can be coupled to the intermediate shaft 20 via the disconnect clutch 18. The intermediate shaft 20 is designed in particular as a rotor shaft of a rotor 22, which cooperates with a stator 24 to form an electric machine 26. The intermediate shaft 20 can be coupled to a transmission input shaft of a motor vehicle transmission, if necessary, by means of a further disconnect clutch. The torsional vibration damper 16, the separating clutch 18, the intermediate shaft 20 and the electric machine 26 can be combined in a common structural unit in the hybrid module 28.

Fig. 2 shows the powertrain system 10 of fig. 1 configured with a hybrid module 28 having a dual mass flywheel as a torsional vibration damper 16 to suppress rotational imbalance in the torque generated by the internal combustion engine. The torsional vibration damper 16 has a primary mass 30 which can be screwed together with the drive shaft 14 of the internal combustion engine 12, which is designed in particular as a crankshaft. The primary mass 30 can define, by means of a welded cover 32, an annular receiving space 34 in which an energy storage element 36 designed as a curved damping spring is arranged, to which the primary mass 30 can be fastened in the tangential direction. A secondary mass 38, which is designed as an outlet flange, projects from the radially inner side into the mounting space 34 in order to be able to be fastened tangentially to the end of the opposite energy storage element 36. The energy storage element 36 may be lubricated with a lubricant. In order to prevent lubricant from flowing out of the installation space 34, the installation space 34 can be sealed by means of a sealing element 40. The sealing element 40 can be pressed against the secondary mass 38 in a relatively rotatable manner by a disk spring 42 supported on the primary mass 30 or the cover 32.

The secondary mass 38, which is designed as an output flange, also forms the top plate 44 of the separating clutch 18. For this purpose, the secondary mass 38 can have a friction surface that has been roughened, on which friction linings of a clutch disk 48 can be pressed in a friction-fit manner by means of a pressure plate 46, so that the separating clutch 18 is closed. To this end, a set of operating systems 52 powered by hydraulic conduits 50 may act on the compacting plates 32. The secondary mass 38 is supported radially inward and/or centered on the primary mass 30, so that the secondary mass 38 extends over the entire radial region in which the friction linings of the clutch disk 48 are also arranged. Additionally or alternatively, the primary mass 30 and/or the secondary mass 38 can be supported on the intermediate shaft 20.

The clutch disk 48 is connected in a rotationally fixed manner to the intermediate shaft 20 by means of gear shaping. The rotor 22 of the electric machine 26 has a connecting plate 54 with a hub 56, wherein the hub 56 is likewise connected to the intermediate shaft 20 in a rotationally fixed manner by means of toothing. The stator 24 of the electric machine 26, which interacts with the rotor 22, is connected in a connecting region 58 to a housing 60, which supports and supports the intermediate shaft 20 only via an intermediate bearing 62, without separate intermediate components. The bearing 62 is clamped on a journal 64 of the housing 60, wherein the journal 64 of the housing 60 is designed in one piece with the connection region 58 of the housing 60. The housing 60 has a radially inner housing hub 66 which supports the bearing 62 via a journal 64 on the radially inner side and also supports a radially outer rotor bearing 68 for supporting the connecting disk 54 of the rotor 22 on the housing 60. The connecting disk 54 can form a stepped structure 70 for this purpose by bending, in order to receive and support the rotor bearing 68 in the radial and axial directions. In the illustrated embodiment, the operating system 52 is rigidly secured to a clutch cover 72 that is secured to the secondary mass 38. Additionally or alternatively, operating system 52 may be supported and supported on coupling disc 54 of rotor 22 or on countershaft 20. Operating system 52 may be at least partially inserted radially inward into and nested with motor 26. Likewise, the separating clutch 18 can be inserted at least partially radially into the torsional vibration damper 16 and can be inserted into it, so that axial installation space can be saved in each case.