WO2018103876A1

WO2018103876A1 - Driving unit and drive train device for a motor vehicle

Info

Publication number: WO2018103876A1
Application number: PCT/EP2017/001298
Authority: WO
Inventors: Timo Armbruster; Martin Dengler; Tobias Schuster; Martin Schwarz
Original assignee: Daimler Ag
Priority date: 2016-12-09
Filing date: 2017-11-08
Publication date: 2018-06-14
Also published as: DE102016014671A1

Abstract

The invention relates to a driving unit (4) having an electric machine (1). According to the invention, the driving unit (4) comprises a spacer device (5) for radially spacing a rotor (6) with respect to a stator (7) and/or a housing (8) during mounting, wherein a minimum inside diameter (D_min) of the spacer device (5) corresponds substantially to an outside diameter (D_H) of a holding element (9) of the rotor (6), and an outside diameter (D_A) of the spacer device (5) corresponds substantially to an inside diameter (D_I) of a housing region associated with the holding element (9) of the rotor (6), and wherein the spacer device (5) is designed in such a way that it is axially displaceable in the housing (8).

Description

Drive train and drive train device for a motor vehicle

The invention relates to a power car and a drive train device for a

Motor vehicle.

From DE 103 05 762 A1 a drive train is known, which comprises a housing, an electrical machine disposed within the housing and a radial bearing, by means of which a rotor of the electric machine is radially mounted on the housing. Further, a powertrain device is described which results from an assembly of the known power train with an internal combustion engine and a transmission.

The invention is based on the object to present a comparison with the prior art improved power train, which is particularly improved in terms of mounting and dismounting.

The object is achieved by a power car with the features of claim 1 and a Antriebsstrangvorrichtugn with the features of claim 10.

Advantageous embodiments of the invention are the subject of the dependent claims.

The starting point of the invention is a drive train which comprises a housing, an electric machine arranged inside the housing and a first radial bearing, by means of which a rotor of the electric machine is radially mounted on the housing. The electric machine has a stator and a rotor, wherein the stator is advantageously connected firmly to the housing and surrounds the rotor.

According to the invention, the drive head has a spacer device for radial

Spacing of the rotor of the electric machine relative to the stator of the electrical machine and / or the housing. This corresponds to a

Inner diameter of the spacer device substantially one

Outer diameter of the rotor, and an outer diameter of the

Spacer device substantially corresponds to an inner diameter of the rotor associated with the region of the housing and / or the stator, wherein the

Spacer device is designed such that it is axially displaceable in the housing.

During assembly or disassembly of the electric machine in the housing, or even during assembly or disassembly of the drive head with a

Housing closure part or on another housing of a motor vehicle, for. B. on a crankcase of an internal combustion engine, it can, in particular at

Permanent magnet machines come to a collision and / or adhesion of the rotor to the stator and / or to the housing. This can cause damage to the rotor or the stator. Furthermore, very high forces may be required in particular in permanent magnet machines to separate the rotor again from the stator.

The invention is particularly advantageous when the housing is formed in one piece, that is, when the housing has no inner flanges and

Has screwed.

With the solution according to the invention, this impact and / or adhesion of the rotor to the stator and / or the housing is prevented because the rotor during assembly and expediently also during disassembly by means of

Spacer device is kept spaced from the stator and the housing. This allows for easy assembly and disassembly, including preferably no or only a few special tools are needed. The rotor and the stator are protected by the solution according to the invention against the above-mentioned damage during assembly and advantageously also during disassembly.

This protection consists both in a mounting of the electric machine in the housing as well as in a mounting of the assembled drive head to the other housing. When mounting the drive head is advantageously mounted as the first stator, then the spacer device and then again the rotor. Rotor and stator are kept apart by the spacer device in the state in which the drive head is completely assembled, but not yet mounted on the other housing. In a special and advantageous case in which the power car additionally a

Torque converter has, is advantageously mounted first of all the torque converter, before the stator is mounted.

Due to the axial displaceability of the spacer device, the

Move spacer device during assembly of the drive head to the crankcase such that the rotor is freely rotatable relative to the stator.

The electric machine is for example an electric machine for a

Motor vehicle, in particular an electric drive machine for a drive of the vehicle, wherein the electric machine is expediently usable as an electric motor and / or electric generator. For example, the electrical

Machine arranged in the vehicle between the engine and a transmission of the vehicle. It is here, for example, with a crankshaft of the

Combined combustion engine. With the transmission, for example, it is coupled via a torque converter. However, other installation positions of the electric machine in the vehicle are possible. In particular, it is also possible that the vehicle has no internal combustion engine.

By the first radial bearing is meant a bearing device by means of which the rotor is mounted radially on the housing. In this case, the rotor may be mounted directly or indirectly on the first radial bearing on the housing. Under an indirect storage storage of a fixed to the rotor connected, so be rotated with the rotor other component to be understood. For example, the rotor with a torque transmitting device, for example in the form of a

Be connected torque transmission bell. In addition, the rotor may be connected to a pump wheel of a torque converter. The first radial bearing can in these cases, the torque transmission bell or impeller on the

Store housing radially, which in these cases, the rotor indirectly to the

Housing is stored.

Particularly advantageously, the first radial bearing is designed as a rolling bearing.

Particularly advantageously, the first radial bearing is the only rolling bearing for the bearing of the rotor to the housing. By the invention, the rotor on one side of the

Drive head are supported radially by the first radial bearing against the housing and on the other side of the power head, the rotor can through the

Spacer device are supported against the housing.

In an advantageous development of the rotor comprises a holding element, wherein the inner diameter of the spacer device substantially the

Outer diameter of the retaining element corresponds. The retaining element is firmly connected to the rotor. Particularly advantageously, the holding element has a ring or hat shape or an interrupted ring or hat shape.

In a further advantageous development, the spacer device is arranged on one side of the housing, so that the spacer device, which is mounted as described after assembly of the stator, can be easily mounted. In this case, the first radial bearing is particularly advantageously arranged on an opposite side of the housing. Particularly advantageous are first radial bearing and

Spacer device arranged in each case in opposite end regions of the housing.

It is furthermore particularly advantageous if the first radial bearing is arranged on an output side of the housing. An output side of the drive head is to be understood as a side of the housing which, in a state installed in the motor vehicle, faces the transmission or a wheel drive of the motor vehicle.

It is furthermore particularly advantageous if the rotor has a stub shaft which projects axially beyond the housing. By means of the stub shaft, it is possible to axially mount the rotor, in a mounted state in a vehicle, outside the housing to another housing part. The rotor can thus be mounted radially in the mounted state in a vehicle in two places, namely on the one hand by means of the first radial bearing on the housing and on the other hand by means of a radial bearing of the stub shaft on the other housing part.

Furthermore, it is advantageous if the spacer device comprises a spacer ring or a plurality of spacer ring segments. In this way, an annular gap between the rotor and the housing can be filled with only one component or only a few components and thus a radial securing can be achieved.

Furthermore, it is advantageous if the spacer device has a region with a larger inner diameter. In this way, the Spacer device has a varying thickness in the axial direction. In this way, when the spacer device occupies different axial positions, in a first axial position of the spacer device, an annular gap between the rotor and the stator and / or the housing can be substantially completely filled and only partially in a second axial position of the spacer device filled, which is given by the second axial position complete mobility of the rotor.

Particularly advantageously, in this case, in the axial direction, the outer diameter of the spacer device is substantially constant.

The invention also has a particularly advantageous effect if the drive head has a torque converter inside the housing and the rotor is connected to a pump wheel of the torque converter, wherein the pump wheel is radially mounted on the housing by means of the first radial bearing. The rotor is thus indirectly mounted radially on the housing by means of the first radial bearing. The torque converter is arranged completely inside the housing. In this way, a particularly compact and easy to assemble power car with an integrated

Torque converter can be displayed.

Furthermore, it is advantageous if the spacer device has a spring arrangement for the axial support of the spacer device relative to the housing, wherein the spacer device is axially displaceable against a spring force of the spring arrangement in the housing. In this way, when mounting the housing to another housing part, the spacer device can be moved against the spring force, wherein upon disassembly of the housing from the other housing part due to the spring force, the spacer device is moved back into a locking position.

A further development of the invention provides a drive train for a motor vehicle, which has an internal combustion engine and a drive head of the type described above, wherein the rotor of the drive head radially to a crankshaft of the

Internal combustion engine is mounted, wherein the crankshaft is mounted via a second radial bearing on a crankcase of the internal combustion engine, wherein the first radial bearing is designed as a rolling bearing and the first radial bearing is the only rolling bearing, by means of which the rotor is mounted on the housing of the power head. Embodiments of the invention are explained in more detail below with reference to drawings.

Showing:

Fig. 1 is an opened housing and inserted therein and by means of a

Spacer device held rotor of an electric machine in a perspective view,

2 shows a spacer device and an anti-twist device of a drive head in a perspective representation,

Fig. 3 is an opened housing and inserted therein and by means of a

Spacer device held rotor of an electric machine in a sectional view,

4 is a detailed view of Figure 3,

5 shows an electrical machine at a first time of assembly, FIG. 6 shows a detailed view of FIG. 5, FIG.

Fig. 7 shows schematically a connection region of an internal combustion engine and a

Gearbox at the first time,

8 shows an electrical machine at a second time of assembly,

9 is a detailed view of Figure 8,

10 shows schematically a connection region of an internal combustion engine and a

Gearbox at the second time,

11 shows an electric machine at a third time of assembly,

12 is a detailed view of Figure 11, FIG. 13 schematically shows a connection region of an internal combustion engine and a transmission at the third time point, FIG.

14 is a detailed view of the electric machine with a rotation, and

Fig. 15 is a sectional view of a rotation.

Corresponding parts are provided in all figures with the same reference numerals.

The drive head and the drive train device according to the invention will be explained below with reference to FIGS. 1 to 15, and an assembly of an electric machine 1 will be explained, with a time sequence for assembling being illustrated in particular by FIGS. 3, 5, 8 and 11.

The electric machine 1 is provided, for example, for use in a vehicle, not shown here, in particular as an electric drive machine, wherein the electric machine 1 in an engine operation and / or in a

Generator operation can be used. In the illustrated example, by the assembly of the electric machine 1 is also a coupling of the electric machine 1 with an internal combustion engine 2 and a transmission 3, wherein the coupling with the transmission 3 via a torque converter (29). However, the assembly described below and a drive head 4 designed for this purpose are also suitable for mounting electrical machines 1, which are not coupled to an internal combustion engine 2 and / or a transmission 3.

The power car 4 includes the electric machine 1 and a

Spacer device 5, also referred to as a centering ring, for the radial spacing of a rotor 6 of the electric machine 1 relative to a stator 7 of the electric machine and / or a housing 8 of the electric machine 1 during assembly. This spacer device 5 is already arranged in FIG. 1 between the rotor 6, more precisely between a holding element 9 of the rotor 6 and the housing 8. In Figure 2, this spacer device 5 is shown outside the electrical machine 1. The spacer device 5 is formed such that an inner diameter Dmin - a smallest inner diameter in this example - of the spacer device 5 substantially corresponds to an outer diameter DH of the holding member 9 of the rotor 6, so that the spacer device 5 on the holding member 9 of the rotor 6 in

Essentially free of radial play can be placed. Furthermore, the

Spacer device 5 is formed such that an outer diameter D _{A of} the spacer device 5 substantially corresponds to an inner diameter Di of the holding member 9 of the rotor 6 associated housing portion, so that the spacer device 5 is inserted substantially radially play in this housing area. The housing region is the region of the housing 8 in which the spacer device 5 is to move axially, as will be even closer hereinafter

is described.

In FIG. 1, the spacer device 5 inserted into the housing area is shown with the likewise inserted rotor 6, whose holding element 9 is arranged in the spacer device 5. By the spacer device 5, in particular in permanent magnet machines, bouncing and / or adhesion of the rotor 6 during assembly and also avoided during and after disassembly, since the rotor 6 by means of the spacer device 5 at a distance from the stator 7 and

Housing 8 is held. As a result, damage to the electrical sheet and / or the magnet are avoided and it is a simple assembly and disassembly possible.

In order to achieve free movement of the rotor 6 after assembly of the electric machine 1 in a vehicle so that it can rotate freely in the stator 7 and does not drag on the spacer device 5, it is necessary to remove the spacer device 5 from the rotor 6, in this example more precisely, its retaining element 9, to solve. For this purpose, the spacer device 5 and expediently as well

Housing portion in which the spacer device 5 is arranged, formed such that the spacer device 5 in the housing 8 axially, d. H. in

Longitudinal direction of an axis of rotation of the rotor 6, is displaceable. Conveniently, this displacement of the spacer device 5 is effected by closing the housing 8 with a housing closure part 10, wherein the

Housing closure member 10 acts on the spacer device 5 and this moves axially in the housing 8 in the housing closure direction, that is in the housing 8 inside, and thereby pushes down from the holding member 9 of the rotor 6, as shown in Figure 11. The housing closure member 10 may be, for example, a cover for the housing 8 or a flange of another housing, which in an installed state in the Vehicle the housing 8 connects. Advantageously, the housing closure member 10 may be a flange of a crankcase of an internal combustion engine.

The spacer device 5 is arranged on a first end region 24 of the housing 8, in the example on a driven-side first end region 24 of the housing 8. With this arrangement, it is possible that the rotor 6 is radially mounted in the housing 8 by a single radial bearing 26. The radial bearing 26 is designed as a rolling bearing and arranged on a second end portion 25 of the housing 8. The second end region 25 is axially opposite the first end region 24. The radial bearing 26 supports the rotor 6 indirectly by the radial bearing 26 a pump 28 of a Drehomomentwandlers 29 stores, wherein the rotor 6 via a Drehomomentübertragungsglocke 30 with the

Impeller 28 is connected.

The rotor is thus mounted on one side radially by the radial bearing 26 and secured on the other side in the non-vehicle state or in a non-provided with the housing closure member 10 state radially by the spacer device 5.

In a state installed in the vehicle, as shown in FIG. 11, the radial securing is canceled by the spacer device 5. Instead, the rotor 6 is then radially supported by a second radial bearing 31, wherein the radial bearing 31 supports the rotor 6 against the housing closure part 10. In the example this is

Housing lock part 10 a part of a crankcase of the internal combustion engine. In the example, the radial bearing 31 supports a crankshaft 23 on the housing closure part 10, wherein the rotor 6 is inserted into the crankshaft 23 via a stub shaft 27.

In order to prevent premature lowering of the spacer device 5 from the holding element 9 of the rotor 6 and to enable a disassembly of the rotor 6, a preferably automatic sliding of the spacer device 5 on the holding element 9 of the rotor 6, the spacer device 5, a spring assembly 11 for axial support of Spacer device 5 relative to the housing 8, wherein the spacer device 5 for removing from the holding member 9 of the rotor 6, d. H. during assembly of the electric machine 1, against a spring force of the spring assembly 11 in the housing 8 is axially displaceable. By the spring assembly 11 is thus further achieved that when disassembling the electric machine 1, the spacer device 5 during the removal of the

Housing closure member 10 spring loaded by the spring assembly 11 again aufschiebt on the holding member 9 of the rotor 6, so that even during disassembly of the rotor 6 is securely spaced from the stator 7 and the housing 8. In a method for mounting the electric machine 1 in such

Drive head 4 is thus the rotor 6 with its holding element 9 in the

Abstandshaltervornchtung 5 inserted and inserted into the housing 8 with the stator 7. In this case, either first the spacer device 5 in the

Housing 8 are used and then the rotor 6 are inserted into the housing 8 and the stator 7 until it is positioned in the Abstandvorvorvorchtung 5, or the Vorstandsvornchtung 5 is first placed on the holding member 9 of the rotor 6 and then the rotor 6 is composed used with the Abstandshaltervornchtung 5 in the housing 8 and thus in the stator 7.

For closing the housing 8, the housing closure part 10 is then placed on the housing 8, wherein the spacer device 5 by means of

Housing closure member 10 axially displaced in the housing 8 and thereby by the rotor 6, more precisely by the retaining element 9, is released. When disassembling the housing closure member 10 is removed again, whereby the Abstandshaltervornchtung 5 spring-loaded by the spring assembly 11 is pushed back in the housing 8 axially in the direction of the support member 9 of the rotor 6 and thus pushed onto this.

As a result, the rotor 6 is radially fixed again, d. H. kept at a distance from the stator 7 and the housing 8, and can now be removed from the stator 7 and the housing 8, wherein the spacer device 5 is removed with or remains in the housing 8.

The spring assembly 11 has in the example shown a plurality of

Spring elements 12 which are formed here as coil springs. In other examples, differently designed spring elements 12 are possible. The

Spring elements 12 are held by means of spring supports 13, which are formed in the example shown as screw in the form of a screw and the respective spring element 12 retaining nut on the Abstandshaltervornchtung 5 and are during the placement of the Abstandshaltervornchtung 5 in the housing 8 in corresponding spring receptacles of the housing. 8 used. The spring elements 12 are based on a bottom of the respective spring receptacle and are initially relaxed. By closing the housing 8 with the

Housing lock part 10 and the resulting axial displacement of the

Abstandshaltervornchtung 5 in the housing 8, the spring elements 12 are increasingly stretched. If the housing 8 is opened again by removing the housing closure part 10, the spacer device 5 is moved by means of the spring elements 12 and under Relax the spring elements 12 in the housing 8 is pushed in the direction of the retaining element 9 of the rotor 6 and pushed onto this.

In the example shown, a detent element 14, which engages in a respective detent recess 15 of the housing 8, is particularly advantageously arranged on the end of the respective spring element 12 facing away from the spacer device 5. As a result, the spacer device 5 is secured to the housing 8. Ie. the

Spacer device 5 is inserted into the housing 8 until the locking elements 14 engage, and then the rotor 6 can be used for mounting in the housing 8, removed for disassembly from the housing 8 and re-installed in the housing 8 for reassembly, wherein the Spacer device 5 always remains in the housing 8, since it is connected by means of the locking elements 14 with the housing 8.

In the example shown here, the spacer device 5 comprises a

closed spacer ring. In other embodiments, the

Spacer device 5 comprise a plurality of spacer ring segments which, when assembled together, substantially yield a spacer ring. This

However, composite spacer ring then does not necessarily have to be completely closed.

In the illustrated example, the spacer device 5, in addition to a region with the smallest inner diameter Dmin, a region with a larger

Inner diameter D _g on, ie it is formed in the axial direction of a paragraph. In this case, the spacer device 5 is arranged for mounting the electric machine 1 on the holding element 9 of the rotor 6 and / or in the housing 8, that the area with the larger inner diameter D _g facing away from the housing 8, ie facing the aufzusetzenden housing closure part 10. By the axial displacement of the spacer device 5 deeper into the housing 8 into during the

Closing of the housing 8 with the housing closure part 10 thus slides off the area of the spacer device 5 with the smallest inner diameter Dmin from the holding element 9 of the rotor 6 and the holding element 9 of the rotor 6 is then in a larger inner diameter D _g formed by the larger inner diameter of the spacer device 5 positioned in which the holding member 9 of the rotor 6, the spacer device 5 no longer touched.

By this formation of the spacer device 5 with the range of the smallest inner diameter Dmin and thus a small clearance and the it subsequent region of the larger inner diameter D _g and thus the larger clear width a greater width of the spacer device 5 and thereby greater stability and a larger support surface on the housing 8 is achieved. Furthermore, this makes it possible, at the area with the larger inner diameter D _g on the outside one or, as shown here, a plurality of receptacles 15 for the

Spring arrangement 11, d. H. for the respective spring elements 12 to provide, these shots 15 do not push completely into a housing interior, but serve as a bearing surface for the housing closure part 10, by means of which the spacer device 5 is axially displaced during the closing, and then between the housing 8 and the housing closure part 10 are arranged.

In order to enable a backup of the rotor 6 against rotation during assembly, advantageously during disassembly and also, for example, during transport, a rotation 16 for securing the rotor 6 is provided. This anti-rotation 16 is shown in Figures 1, 2 and 14 and in detail Figure 15. It comprises a retaining pin 17, which is insertable into the housing 8 and engages in the rotor 6, more precisely in its retaining element 9. For this purpose, the holding element 9 of the rotor 6 has at least one feedthrough opening 18 for the holding pin 17, preferably a plurality of such feedthrough openings 18, as shown in FIG.

The retaining pin 17 is arranged in the example shown in a sleeve 19 which has an external thread, so that the sleeve 19 can be screwed together with the retaining pin 17 in a housing opening with a corresponding internal thread.

For example, the sleeve 19 for this purpose has a hexagonal profile on its outer circumference in order to screw it by means of a corresponding tool in the housing 8 and also to unscrew it again. Other examples may also provide other profiles or other tooling capabilities.

The retaining pin 17 is secured in the sleeve 19 by means of a snap ring 20 which engages in snap ring grooves in the sleeve 19 and the retaining pin 17. As a result, a secure attachment of the retaining pin 17 in the longitudinal direction of the retaining pin 17 is achieved on the sleeve 19 and also allows a rotational movement of the retaining pin 17 relative to the sleeve 19.

The passage openings 18 in the holding element 9 of the rotor 6 are expediently designed in each case as a slot. The retaining pin 17 has at a retaining end 21, which on the holding element 9 of the rotor 6 acts on a corresponding to these slots shape. As a result, the retaining pin 17 can be passed through the respective elongated hole in the retaining element 9 of the rotor 6 and then rotated by a quarter turn, whereby it locks on the retaining element 9 of the rotor 6. Thus, the rotor 6 is held against rotation by the retaining pin 17 and also secured against axial displacement in the housing 8.

In order to rotate the retaining pin 17 in the sleeve 19, the other end facing away from the holding end 21 of the retaining pin 17, which is arranged in the sleeve 19, a Werkzeugangriffsausformung 22, which is formed in the example shown as a hexagon socket. As a result, the retaining pin 17 with a corresponding tool in the sleeve 19 is rotatable. In other

Embodiments may be provided differently trained Werkzeugangriffsausformungen 22. Furthermore, the retaining pin 17 with its end facing away from the holding end 21, for example, also protrude from the sleeve 19, so that then correspondingly other Werkzeugangriffsausformungen 22 are possible.

The installation procedure will be described again below. First, the

Spacer device 5 is inserted into the housing 8, wherein the spring elements 12 are arranged in the spring receptacles of the housing 8 and the locking elements 14 engage in the housing 8. Subsequently, the rotor 6 is inserted into the housing 8 and the stator 7, wherein the holding member 9 of the rotor 6 in the spacer device 5, more precisely in the region with the smallest inner diameter D _min and thus the small clear width, is positioned. The spacer device 5 now bears against a circumference of the holding element 9 of the rotor 6 and on an inner circumference of the housing 8 and thus keeps the rotor 6 at a radial distance from the housing 8 and the stator 7, as shown in FIGS. 1, 3 and 4 ,

To secure the rotor 6, the anti-rotation 16 is now arranged. For this purpose, the sleeve 19 is screwed into the housing 8, wherein the retaining pin 17 and the rotor 6 are aligned such that the retaining end 21 of the retaining pin 17 with a

slot-shaped passage opening 18 of the holding member 9 of the rotor 6 is congruent. After performing the holding end 21 of the retaining pin 17 through one of the slot-shaped passage openings 18 in the holding element 9 of the rotor 6, the retaining pin 17 is rotated by a quarter turn, so that the retaining pin 17 is latched to the retaining element 9 of the rotor 6. As a result, the rotor 6 is now by means of Spacer device 5 radially and by means of the rotation 16 against rotation and also secured against axial displacement.

The housing closure part 10, which is, for example, a housing part of the internal combustion engine 2, is then positioned on the open housing 8 or the opened housing 8 is positioned accordingly on the internal combustion engine 2, as shown in FIG. 5 and FIG. Conveniently, it is on a side remote from the engine 2 side of the electric machine 1 the

Gear 3, expediently positioned together with the torque converter. FIG. 7 shows an alignment of an internal combustion engine region and a

Transmission area at this stage of assembly.

Subsequently, the housing 8 is moved to the housing closure member 10 by an increasing Aufeinanderzubewegen the housing 8 and the

Housing closure part 10 is closed, as shown in Figures 8 and 9 and 11 and 12. FIGS. 10 and 13 show the successive movement and connection of the internal combustion engine 2 with the transmission 3, which are then coupled to one another via the electric machine 1, with only a section of the internal combustion engine 2 and the transmission 3 being shown here. In the illustrated example, the rotor 6 is coupled to a crankshaft 23 of the internal combustion engine 2.

As shown in Figures 11 and 12, the spacer device 5 is axially displaced by closing the housing 8 by means of the housing closure part 10 in the housing 8, d. H. further pushed into the housing 8, whereby the

Spring elements 12 are tensioned and the spacer device 5 from the holding element 9 of the rotor 6 dissolves. Subsequently, the anti-rotation 16 is removed, as shown in Figure 14. For this purpose, the retaining pin 17 is rotated by a quarter turn, so that the slot-shaped passage opening 18 and the retaining end 21 of the retaining pin 17 are congruent, and then the rotation 16 is removed by unscrewing the sleeve 19 from the housing 8. Now, the rotor 6 can rotate freely, as it neither by the rotation 16 nor by the

Spacer device 5 is blocked.

A disassembly of the electric machine 1 is carried out in the reverse manner, ie first the rotation 16 is again arranged. For this purpose, the sleeve 19 is screwed into the housing 8, wherein the retaining pin 17 and the rotor 6 are aligned such that the retaining end 21 of the retaining pin 17 with a slot-shaped Through opening 18 in the holding element 9 of the rotor 6 are congruent. After performing the holding end 21 of the retaining pin 17 through one of the slot-shaped passage openings 18 in the holding element 9 of the rotor 6, the retaining pin 17 is rotated by a quarter turn, so that the retaining pin 17 is latched to the retaining element 9 of the rotor 6. As a result, the rotor 6 is now by means of the rotation 16 against a

Twist and also secured against axial displacement.

Subsequently, the housing closure member 10 is removed from the housing 8, whereby the spring-loaded spacer device 5 is pushed in the direction of the holding member 9 of the rotor 6 and on this, so that the rotor 6 is held radially spaced from the housing 8 and stator 7, since the spacer device 5 on Extending the circumference of the retaining element 9 of the rotor 6 and on the inner circumference of the housing 8. Now, the rotor 6 can be removed from the housing 8 and, for example, a new rotor 6 inserted into the housing 8 and the electric machine 1 are mounted again.

LIST OF REFERENCE NUMBERS

electric machine

internal combustion engine

transmission

Triebkopf

Abstandshaltervomchtung

rotor

stator

casing

retaining element

Housing closure

spring assembly

spring element

spring retainer

locking element

admission

twist

retaining pin

Through opening

shell

snap ring

holding end

Werkzeugangriffsausformung

crankshaft

first end area

second end area

radial bearings

stub shaft

impeller 29 torque converter

30 torque transmission bell

31 second radial bearing

DA outer diameter of the spacer device

D _g larger inner diameter

D _H outer diameter of the retaining element

Di Inner diameter of the housing area

Dmin smallest inner diameter of the spacer device

Claims

claims

1. engine head (4) for a motor vehicle, comprising

- A housing (8) and

- An inside the housing (8) arranged electrical machine (1) with a rotor (6) and a stator (7),

a first radial bearing (26), by means of which the rotor of the electric machine is mounted directly or indirectly on the housing (8) radially,

marked by

a spacer device (5) for radial spacing of the rotor (6) relative to the stator (7) and / or the housing (8), wherein a

Inner diameter (Dmin) of the spacer device (5) substantially an outer diameter (D _H ) of the rotor (6) and an outer diameter (D _A ) of the spacer device (5) substantially an inner diameter (Di) of the rotor (6) associated region the housing (8) or the stator (7) corresponds, and wherein the spacer device (5) is designed such that it is axially displaceable in the housing (8).

2. power head (4) according to claim 1,

characterized in that the rotor (6) comprises a holding element (9) and that the inner diameter (D _min ) of the spacer device (5) substantially corresponds to an outer diameter (DH) of the holding element (9).

3. power unit (4) according to one of the preceding claims,

characterized in that the spacer device (5) is arranged on a first end region (24) of the housing (8).

4. power head (4) according to one of the preceding claims,

characterized in that the first radial bearing (26) at a second End region (25) of the housing (8) is arranged.

5. power head (4) according to one of the preceding claims,

characterized in that the rotor (6) has a stub shaft (27) which projects axially beyond the housing (8).

6. power head (4) according to one of the preceding claims,

characterized in that the spacer means (5) comprises a

Spacer ring or more spacer ring segments comprises.

7. power unit (4) according to one of the preceding claims,

characterized in that the spacer means (5) has an area with a larger inner diameter (D _g ).

8. power head (4) according to one of the preceding claims,

characterized in that the rotor with a pump wheel (28) of a

Torque converter (29) is connected, wherein the impeller (28) by means of the first radial bearing (26) on the housing (8) is radially mounted.

9. power head (4) according to one of the preceding claims,

characterized in that the spacer means (5) comprises a

Spring arrangement (11) for axially supporting the Abstandvorvorvornchtung (5) relative to the housing (8), wherein the Abstandshaltervornchtung (5) against a spring force of the spring assembly (11) in the housing (8) is axially displaceable.

10. powertrain device for a motor vehicle with an internal combustion engine and with a drive head (4) according to one of claims 1 to 9,

characterized in that

the rotor (6) of the drive head (4) radially on a crankshaft (23) of the

Internal combustion engine is fixed, wherein the crankshaft (23) via a second

Radial bearing (31) is mounted on a crankcase of the internal combustion engine, wherein the first radial bearing (26) is designed as a rolling bearing and is the only rolling bearing, by means of which the rotor (6) on the housing (8) of the drive head (4) is mounted.