DE102014007568A1 - Mounting arrangement of a stator of an electrical machine to a component, in particular for a motor vehicle - Google Patents

Abstract

The invention relates to a fastening arrangement of at least one stator element (12) formed from a first material as the first component of an electric machine (10) on a second component (14) formed from a second material different from the first material, in particular for a motor vehicle, in which the first component (12) is fastened at least in the circumferential direction of the stator element (12) to the second component (14) via at least one fastening device (26), the fastening device (26) being provided on one of the components (12, 14) and extending into radial direction extending guide (28) and in the guide (28) engaging and by means of a screw (30) on the other of the components (12, 14) fixed bushing (32) along which the one component (12) at a thermally induced movement relative to the other component (14) is displaceable in the radial direction.

Description

The invention relates to a fastening arrangement of a stator element of an electrical machine to a component, in particular for a motor vehicle, according to the preamble of patent claim 1.

Such mounting arrangements are already well known from the general state of the art, in particular from production vehicle construction. In such a fastening arrangement, at least one stator element formed from a first material is fastened as a first component of an electrical machine to a second component formed from a second material different from the first material. In other words, the electric machine comprises a stator with the stator element, wherein the stator element is a first component of the electric machine. Usually, the electric machine also includes a rotor, which is rotatable about an axis of rotation relative to the stator. The materials are, for example, metallic materials.

The second component is for example a housing in which the stator element is at least partially arranged or arranged. The housing may be a self-contained housing for the electrical machine. However, the second component may also be a carrier structure or a housing of a different component of the electrical machine or assembly, in particular of the motor vehicle. This component is, for example, a transmission, wherein the second component is a housing of the transmission, that is to say a transmission housing. Here, the electric machine is designed, for example, as a so-called gear-integrated electric machine, which is at least partially and for example at least predominantly or completely received in the transmission housing.

The second material of the second component is, for example, a light metal, in particular aluminum or an aluminum alloy. As a result, the weight of the second component can be kept particularly low.

The first material of the stator element is, for example, a material with magnetic properties. Here, the first material may be a steel or iron. Usually, the materials have mutually different thermal expansion coefficients, so that during operation of the electrical machine different, temperature-induced movements, in particular expansions, of the components can occur. This results in thermally induced relative movements between the components.

There are different ways known to connect the stator with the second component. In the context of the fastening arrangement, the stator element can be fastened by means of at least one fastening device on the second component at least in the circumferential direction of the stator element. Conventionally, the fastening device comprises at least one screw, in particular a screw, by means of which the components are screwed. Thus, for example, at least one screw is provided, by means of which the components are connected to each other.

Moreover, it is known to connect the stator to the device by means of a press fit. Especially in the connection of the components via a press fit different thermal expansions of the components are problematic, since this could lead to a relaxation or even a release of the interference fit. However, even when screwing or screw thermally induced, different thermal expansions are taken into account to prevent the components solve.

If, for example, thermally induced, different thermal expansions of the components, so it may be accompanied by an increase in a radial clearance between the components. This can lead to the stator element becoming out of alignment, which may result in a functional impairment and / or an efficiency deterioration of the electrical machine. In a rigid, conventional screwing of the components resulting from the different thermal expansion stresses of the components, resulting in undefined deformations. This can result in offsets and high component loads.

The DE 10 2005 040 403 A1 discloses a mounting arrangement on motor vehicles between at least one plastic component and at least one metal structural component, which are subject to a different thermal expansion due to heat input by painting processes or the like. It is provided that the at least one plastic component with the at least one metal structural component by means of at least one mechanical fastening element by a slot forming a recess in the plastic component through the metal structural component is set such that a relative movement in the direction of the largest extension of the elongated hole between the plastic component and the metal structural component as a result of said heat input and concomitant differential thermal expansion is permitted.

Object of the present invention is to provide a mounting arrangement of the type mentioned, in which excessive damage to the electrical machine due to thermally induced thermal expansion of the components can be avoided.

This object is achieved by a fastening arrangement having the features of patent claim 1. Advantageous embodiments with expedient and non-trivial developments of the invention are specified in the remaining claims.

In order to develop a mounting arrangement specified in the preamble of claim 1 type such that can be avoided due to thermally induced thermal expansion of the components, it is inventively provided that the fastening means provided on one of the components and in the radial direction extending guide and one engaging in the guide and fixed by means of a screw on the other of the components socket along which the one component is displaced in a thermally induced movement relative to the other component in the radial direction.

The fact that the one component can move relative to the other component in the radial direction, for example to the outside in a thermally induced movement relative to the other component, the radial degree of freedom of a component is not limited relative to the other component. As a result, for example, in the case of thermally induced, mutually different thermal expansions of the components, undefined and excessive deformations of these components can be avoided. As a result, unwanted desalination and excessive component loads can be avoided, so that the electric machine can be operated efficiently and thus efficient efficiency.

The bushing and the guide thereby ensure a defined and controlled, guided movement of the components relative to one another, so that undesired movements of the components relative to each other can be avoided. For example, causes an increase in temperature of the electric machine, an increase in a diameter clearance between the components, it can be ensured relative to the second component by means of the bushing and the guide yet a centering of the stator. The centering is more precise and better, the smaller a clearance between the bushing and the guide or a wall bounding the guide of the one component. If, for example, the bush is free of play with respect to the guide or the one component, then a desalination can be avoided.

As part of an assembly of the socket this is positioned in the guide and then fastened by means of the screw on the other component. In other words, the socket is screwed to the other component. In the course of this screwing position tolerances and thus component tolerances can be compensated by a game between the screw, in particular an outer diameter of the screw, and the bush surrounding the screw, in particular an inner diameter of the bushing.

In order to ensure a particularly advantageous positioning of the stator relative to the second component, at least three fastening devices are provided in an advantageous embodiment of the invention. The previous versions of the fastening device can be easily transferred to the other fasteners. Preferably, the fastening means are distributed in the circumferential direction of the stator, in particular evenly distributed, arranged. This means, for example, with exactly three fastening devices, that the fastening devices in the circumferential direction of the stator element are spaced apart in pairs by 120 degrees. Depending on the arrangement resulting from the game between the jack and the guide or a component of different size residual games.

An axial alignment of the one component relative to the other component takes place, for example, by means of at least one third component, in particular an elastic third component. The third component may be formed, for example, as a spring or spring element. By means of the third component, a component is tensioned in the axial direction of the stator element against the other component. As a result, tilting of the components relative to one another can be reliably prevented.

The second component is designed, for example, as a housing element in which the first component in the form of the stator element is arranged at least partially. In order to realize a pre-centering in the housing element during assembly of the stator element, it is preferably provided that at least one elastic element is arranged in the radial direction between the components. The elastic element is arranged, for example, in the radial direction on the one hand on the stator element and on the other hand on the stator peripheral side at least partially surrounding the housing element. This elastic element may be a sealing element such as an O-ring, which is formed of rubber.

A torque transmission and thus a torque support between the components takes place for example by a positive connection, which is effected by the engaging in the guide and thus in the one component sleeve. The socket is in turn held by means of the screw on the other component. By means of the screw a screw is created, by means of which the socket is held on the other component. Here, by means of the screw a biasing force causes, by means of which the bush is clamped against the other component. The bush is frictionally fixed by this biasing force of the screw to the other component. In addition, a torque transmission and thus a torque support by said axial bias of the one component can be carried out against the other component. By means of this axial prestressing, an additional torque can be transmitted by frictional engagement between the components.

In the case of the fastening arrangement according to the invention, the stator element can remain positively centered relative to the second component over all temperature ranges. Since a thermally induced movement of one component is permitted by the guide relative to the other component, resulting from thermal expansion stresses can be safely avoided.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing. The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the description of the figures and / or in the figures alone can be used not only in the respectively specified combination but also in other combinations or in isolation, without the scope of To leave invention.

The drawing shows in:

1 a schematic longitudinal sectional view of an electric machine for a motor vehicle, with a first embodiment of a mounting arrangement of a first component to a second component, wherein the first component is attached to the second component at least in the circumferential direction of the first component by means of at least one fastening device, wherein the fastening means a on one of the components provided and extending in the radial direction guide and engaging in the guide and fixed by means of a screw on the other of the components socket along which the one component in a thermally induced movement relative to the other component in the radial direction displaceable is;

2 1, a schematic perspective view of the fastening arrangement according to the first embodiment;

3 a fragmentary schematic perspective view of the mounting arrangement according to the first embodiment, wherein the screw is not shown;

4 a schematic side view of the first component and a lid;

5 a schematic front view of the first component with the fastening device according to a second embodiment;

6 a schematic sectional view of the fastening device according to the second embodiment along a in 5 shown section line AA;

7 another schematic sectional view of the fastening device according to the second embodiment, wherein the lid is provided;

8th a fragmentary sectional view of the fastening device according to a third embodiment; and

9 a fragmentary sectional view of the fastening device according to a fourth embodiment.

In the figures, the same or functionally identical elements are provided with the same reference numerals.

1 shows in a schematic longitudinal sectional view with a whole 10 designated electrical machine with a mounting arrangement of a first component in the form of a stator 12 on a second component in the form of a housing element 14 , The electric machine 10 is used, for example, in a motor vehicle, in particular a passenger car. The motor vehicle is designed for example as an electric vehicle or hybrid vehicle, wherein the electric machine 10 be designed as a traction machine for driving the motor vehicle can. The stator element 12 is a so-called stator housing a whole with 16 designated stator of the electric machine 10 , The electric machine 10 also includes one with the stator 16 corresponding rotor 18 which is about an axis of rotation relative to the stator 16 is rotatable.

The stator 16 comprises at least one further stator element 20 , which may have windings and on the stator 12 (Stator housing) is attached. This is the stator element 20 over the stator element 12 on the housing element 14 attached.

Out 1 it can be seen that through the housing element 14 a recording room 22 is limited. In this case, the stator element 12 at least partially and in the present case at least predominantly in the receiving space 22 arranged. Also the rotor 18 is in the recording room 22 arranged. In 1 is also a third component of the motor vehicle recognizable. This third component is a lid 24 for the housing element 14 , By means of the lid 24 can the recording room 22 be closed in the axial direction.

1 to 3 show the mounting arrangement according to a first embodiment. In the context of the mounting arrangement is the stator 12 by means of at least one fastening device 26 at least in the circumferential direction of the stator element 12 on the housing element 14 (second component) attached. Preferably, at least three fastening devices are provided, which preferably in the circumferential direction of the stator 12 are arranged evenly distributed. The previous and following versions of the fastening device 26 can also be transferred to the other fasteners.

The stator element 12 (first component) is formed of a metallic first material. For example, the stator element 12 made of iron or a steel. In order to keep the weight of the motor vehicle particularly low, is the housing element 14 formed from a different from the first material, metallic second material. The second material is, for example, a light metal or a light metal alloy, in particular aluminum or an aluminum alloy. These different materials of the stator 12 and the housing member 14 have different thermal expansion coefficients, so that when the stator element is heated 12 and the housing member 14 to different thermal expansions of the stator 12 and the housing member 14 can come. This results in thermally induced relative movements between the stator 12 and the housing element 14 ,

During operation of the electric machine 10 this heats up. To avoid excessive damage to the electric machine 10 to easily avoid, includes the fastening device 26 one on one of the components and in this case on the stator 12 provided and extending in the radial direction guide 28 , which is formed according to the first embodiment as a slot. The slot has a so-called main extension direction, which is the largest extension of the elongated hole. This largest extent (main extension) extends in the radial direction of the stator 12 ,

In addition, the fastening device comprises 26 one in the lead 28 engaging and by means of a screw present in the form of a screw 30 fixed socket 32 which are especially good 3 is recognizable. The socket 32 has a passage opening 33 on which of the screw 30 , especially its shaft is penetrated.

The leadership 28 (Slot) is presently designed as a passage opening, wherein the socket 32 the passage opening (guide 28 ) penetrates in the axial direction. This is the lead 28 in its circumferential direction completely circulating through the stator 12 , in particular a wall of the stator element 12 , limited. The one component in the form of the stator 12 is in a thermally induced movement, in particular thermal expansion, relative to the other component in the form of the housing element 14 in the radial direction along the guide 28 displaceable. This means that the leadership 28 thermally induced relative movements between the housing element 14 and the stator element 12 allows, so that excessive tension and deformation and the resulting deterioration in the efficiency of the electrical machine 10 can be avoided.

Furthermore, it is provided, for example, that the stator element 12 by means of the lid 24 , which represents a third component, in the axial direction against the housing element 14 is curious. In other words, the stator element becomes 12 by axial forces against the housing element 14 pressed and thereby held and fixed for example by surface pressure. However, this surface pressure is designed such that thermally induced relative movements between the stator 12 and the housing element 14 be allowed in the radial direction. Through the the leadership 28 and thus the stator element 12 penetrating socket 32 however, is particular in Circumferential direction of the stator 12 a positive connection between the stator 12 and the housing element 14 ensures, over this positive locking a torque transmission and a torque support can be ensured.

In particular, a torque and force transmission is guaranteed at all temperatures. The socket 32 surrounds at least a length range of the screw 30 , in particular the shaft of the screw 30 , The shaft is with a screw head 34 connected. The screw head 34 indicates a tool attack 35 on, over which the screw 30 can interact with a screwing tool. The tool attack 35 is designed for example as Innenvielkant or Innenvielrund. About the through hole 33 penetrating shaft is the screw 32 under mounting of the socket 32 on the housing element 14 in an unrecognizable and an internal thread having screw opening of the housing element 14 screwed.

It can be provided that an outer circumference, in particular an outer diameter, of the bushing 32 the lowest, perpendicular to the main extension extending width of the slot (guide 28 ) corresponds. As a result, for example, a game between the jack 32 and the leadership 28 limiting wall in the circumferential direction of the stator 12 avoided.

Out 2 It is also clear that the leadership 28 through a tab 36 of the stator element 12 is limited, with the tab 36 on a bunch 38 of the stator element 12 is provided. By means of the screw 30 is the socket 32 firmly with the housing element 14 screwed, and the slot is, for example, a lateral fit with the socket 32 fixed in the circumferential direction. The socket 32 is designed for example as a sleeve.

In 4 are elastic elements in the form of spring elements 40 intended. By means of these spring elements 40 becomes an axial bias of the stator 12 against the housing element 14 causes. Through the use of screws, for example, through the lid 24 caused bias or compression of the stator 12 against the housing element 14 be guaranteed. This means that the stator element 12 for example, via the spring elements 40 by means of the lid 24 in the axial direction against the housing element 14 is tense.

It may be as in the exemplary embodiment of 4 three spring elements 40 be provided or alternatively only only two, one or more not in 4 illustrated spring elements 40 be provided. In 4 is the one with 42 identified axis of rotation recognizable. The rotation axis 42 extends at least substantially perpendicular to an end face 44 of the lid 24 , The stator element 12 is in support system with the face 44 arranged. Out 4 can be seen that through this support system of the stator 12 at the frontal area 44 a perpendicularity of the stator 12 in terms of the lid 24 is guaranteed. The stator element 12 is doing by means of the spring elements 40 against the face 44 pressed.

Out 1 and 4 are also elastic elements in the form of sealing elements recognizable, which as O-rings 45 are formed. The O-rings 45 are in the radial direction between the stator 12 and the housing element 14 arranged and on the one hand, that is in the radial direction outwards, on the housing element 14 and on the other hand, ie in the radial direction inwards, on the stator element 12 supported. By means of the O-rings 45 can be a pre-centering of the stator 12 relative to the housing element 14 be effected. Alternatively, a pre-centering could be effected by means of a mounting device.

3 shows the fastening arrangement and the fastening device 26 according to the first embodiment, wherein in 3 the screw 30 not shown. Especially good 3 in synopsis with 1 is evident that the screw 30 or their longitudinal direction in the axial direction of the electric machine 10 runs, leaving the screw 30 (Screw) in the guide 28 engages in the axial direction.

Based on 5 to 7 is a second embodiment of the fastening device 26 and thus the mounting arrangement shown. In 5 are the three attachment devices 26 recognizable, which in the circumferential direction of the stator 12 are arranged evenly distributed. Because exactly three fastening devices 26 are provided, the fastening devices 26 circumferentially spaced in pairs by 120 degrees. This can also be a defined support of the stator 12 on the housing element 14 be effected in the radial direction, without causing undesirable relative movements between the stator 12 and the housing element 14 comes in the radial direction. At the same time, however, thermally induced relative movements between the stator 12 and the housing element 14 be allowed in the radial direction.

In alternative embodiments, not shown, more or less than three fastening devices 26 be provided or the distances between the fastening devices 26 also different angles are without significantly affect the functionality. A symmetrical arrangement of fasteners 26 However, it is likely to be optimal, even if the symmetry is not always narrow in the context of larger tolerance ranges.

Out 6 it can be seen that the screw 30 over her screw head 34 in support system with the socket 32 so that's the screw 30 over her screw head 34 in the axial direction on the socket 32 supported and the socket 32 by means of the screw 30 in the axial direction against the other component in the form of the housing element 14 is curious.

Especially good 6 is recognizable that between the screw 30 , especially between her in 6 With 46 designated shaft and the shaft 46 at least partially surrounding socket 32 a game 48 is provided. This game 48 , which is also referred to as "air", is in the radial direction of the bushing 32 between this and the shaft 46 intended. Between the tab 36 that is, between the stator element 12 , and the socket 32 however, it is not a game or just a very small game 50 intended. 6 shows a state of the mounting arrangement, wherein the lid 24 not mounted yet. This means that the stator element 12 according to 6 not yet by means of the lid 24 against the housing element 14 is stretched in the axial direction.

In 5 is the radial mobility of the stator 12 relative to the housing element 14 by double arrows 51 illustrated. In the second embodiment, the guide 28 by grooves of the stator element 12 formed, with the grooves (guides 28 ) extend in the radial direction in the second embodiment as well.

Out 6 and 7 is evident that the screw 30 in the axial direction without coverage in relation to the stator element 12 can be arranged. Furthermore, it is possible that the socket 32 in the axial direction without coverage in relation to the stator element 12 can be arranged. This makes it possible, for example, the respective socket 32 by means of the corresponding screw 30 on the housing element 14 to attach and only then the stator 12 in the axial direction in the housing element 14 to bring in, with the socket 32 and also the screw 30 , especially her screw head 34 in the axial direction through the guide 28 can be inserted.

Conversely, it is possible, for example, first the lid 24 dismantle and then the stator 12 at the housing element 14 screwed on socket 32 in the axial direction of the housing element 14 to draw. Because both the socket 32 as well as the screw 30 in the axial direction without coverage in relation to the stator 12 can be arranged, the socket 32 and the screw 30 in a simple way from the guide 28 be pulled out in the axial direction, without the socket 32 from the housing element 14 to dismantle.

In such a cover-free arrangement, for example, an axial fixation of the stator 12 relative to the housing element 14 by means of the lid 24 effected, by means of which the stator element 12 against the housing element 14 can be stretched in the axial direction. Then, for example, instead of the screw 30 a simple bolt or bridge usable in the guide 28 intervenes. By this freedom of cover is an axial freedom of the stator 12 created, which can be limited by mounting options.

Alternatively, it is possible that the socket 32 and / or the screw 30 the stator element 12 , especially the tab 36 , covered in the axial direction. For this purpose, for example, the screw 30 and / or the socket 32 a bead, a waistband or a tab on. As a result, the mobility of the stator is 12 in the axial direction along the socket 32 at least limited, wherein the stator element 12 continue by an axial pressure, for example by means of the lid 24 can be attached. The leadership 28 allows a free direction of movement in the radial direction.

7 shows the mounting arrangement in a state in which the lid 24 is mounted. Is the lid 24 mounted, so is the stator element 12 by means of the lid 24 in the axial direction against the housing element 14 curious; excited. Directional arrows in 7 are force arrows, which form a positive connection between the leadership 28 and the socket 32 illustrate. The socket 32 is in turn by the said biasing force of the screw with the housing element 14 frictionally connected.

8th illustrates the fastening device 26 according to a third embodiment. 9 illustrates the fastening device 26 according to a fourth embodiment. In the first embodiment and the second embodiment, the bushing 32 for example, an outer peripheral side surface 52 which has the shape of an at least substantially circular straight circular cylinder. In other words, the outer peripheral side surface is 52 the socket 32 formed according to the first and second embodiments rotationally symmetrical.

However, in the third and fourth embodiments, the bushing has 32 a Rotationalunsymmetric outer peripheral side surface 52 on. In the third embodiment, the outer peripheral side surface is 52 oval shaped. About its outer peripheral side surface 52 is the socket 32 in the circumferential direction of the stator element 12 at this, in particular at the flap 36 , supportable. By such, non-rotationally symmetrical design of the socket 32 can be a zero game between the jack 32 and the stator element 12 be generated. For this purpose, for example, the socket is rotated during its installation until the socket 32 over its outer peripheral side surface 52 in support system with the stator element 12 comes. Then there is no game between the jack 32 and the stator element 12 available. The socket 32 then takes an actual position, which by means of the screw, that is by means of the screw 30 , can be fixed.

At the in 9 shown fourth embodiment of the fastening device 26 is the outer peripheral side surface 52 polygonal, in particular rectangular, formed. Another non-rotationally symmetrical design is conceivable without further ado. Despite this non-rotationally symmetrical configuration of the outer peripheral side surface 52 leaves the fastening device 26 Furthermore, the previously described, radial compensation movement between the stator 12 and the housing element 14 to.

Due to the rotationally asymmetrical design of the socket 32 , in particular its outer peripheral side surface 52 , a particularly simple installation is possible. Tolerances can be avoided. In addition, a simple readjustment can be realized.

It can be provided that the smallest extent of the outer peripheral side surface 52 less than the width of the guide 28 (Slot), wherein the largest extent of the outer peripheral side surface 52 greater than the width of the elongated hole (guide 28 ). This may cause the socket 32 with their small width in the lead 28 be introduced in the axial direction. Then the socket can 32 be twisted until in support system with the tab 36 comes. This allows an exact fit between the socket without special tolerance limits 32 and the stator element 12 , especially the tab 36 , be achieved.

In general, the combination of leadership 28 with the socket 32 a fixation of the stator 12 achieved in the circumferential direction, wherein in the radial direction through the guide 28 a degree of freedom of movement to compensate for different thermal expansions remains. This allows a precise arrangement of the stator 12 preserved in terms of its angular arrangement. In addition, a torque transmission through the bolted socket 32 and especially without or with little play.

The stator element 12 can then also by a strain, bias or pressure in the axial direction with the housing element 14 be connected, in which case this bias can absorb a majority of the forces. Nevertheless, this tension allows thermal expansion of the stator 12 with respect to the housing element 14 in the radial direction, so that respective pressing surfaces of the tension in the radial direction can easily move relative to one another. The socket 32 and the leadership 28 However, ensure a defined leadership of the stator 12 in a thermally induced relative movement, so that a thermally induced movement of the stator 12 in the radial direction relative to the housing element 14 can only take place in the radial direction.

A symmetrical distribution of forces over the entire stator element is advantageous 12 , so that a coaxial arrangement of the stator 12 relative to the housing element 14 can be maintained and no asymmetric dimensions of the stator 12 its centering relative to the housing element 14 can disturb.

At the in 1 to 9 the embodiments shown is the socket 32 by means of the screw 30 on the housing element 14 set, taking the lead 28 on the stator element 12 is provided. However, this can also be provided vice versa, so that, for example, the socket 32 by means of the screw 30 on the stator element 12 attached and the guide 28 on the housing element 14 is provided.

Furthermore, a compression or interference fit between the bush 32 and the tab 36 be provided. Here, an outer circumference, in particular an outer diameter, of the socket 32 slightly larger than the perpendicular to the main extension of the guide 28 running width of the guide 28 , This allows additional pressing forces for attachment of the stator 12 be effected, which can contribute to a symmetrical distribution of forces in the thermal expansion again. Here, the socket 32 for example, in the leadership 28 be pressed and / or hammered and / or tapped. In addition, such a pressure is between the bushing 32 and the tab 36 by said rotation of the socket 32 relative to the tab 36 represented. These pressing forces between the bush 32 and the tab 36 Alternatively, the only fixing forces of the stator can 12 be, which is optionally still stored on the opposite side.

LIST OF REFERENCE NUMBERS

10

electric machine

12

stator

14

housing element

16

stator

18

rotor

20

stator

22

accommodation space

24

cover

26

fastening device

28

guide

30

screw

32

Rifle

33

Through opening

34

screw head

35

tool application

36

flap

38

Federation

40

spring element

42

axis of rotation

44

face

45

O-ring

46

shaft

48

game

50

game

51

double arrow

52

outer peripheral side surface

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102005040403 A1 [0009]

Claims (7)

Fastening arrangement of at least one stator element formed from a first material ( 12 ) as the first component of an electrical machine ( 10 ) on one of a second material different from the first material, the second component ( 14 ), in particular for a motor vehicle, in which the first component ( 12 ) at least in the circumferential direction of the stator ( 12 ) on the second component ( 14 ) via at least one fastening device ( 26 ), characterized in that the fastening device ( 26 ) one on one of the components ( 12 . 14 ) provided and extending in the radial direction guide ( 28 ) and one in the leadership ( 28 ) engaging and by means of a screw ( 30 ) on the other of the components ( 12 . 14 ) fixed socket ( 32 ) along which the one component ( 12 ) in a thermally induced movement relative to the other component ( 14 ) is displaceable in the radial direction. Fastening arrangement according to claim 1, characterized in that at least three fastening devices ( 26 ) are provided, which in the circumferential direction of the stator ( 12 ), in particular evenly distributed, are arranged. Fastening arrangement according to one of claims 1 or 2, characterized in that the screw ( 30 ) in the axial direction of the stator element ( 12 ) without covering in relation to the one component ( 12 ) is arranged. Fastening arrangement according to one of the preceding claims, characterized in that the bushing ( 32 ) in the axial direction of the stator element ( 12 ) without covering in relation to the one component ( 12 ) is arranged. Fastening arrangement according to one of the preceding claims, characterized in that the bushing ( 32 ) a rotationally asymmetric outer peripheral side and at least partially in the guide ( 28 ) arranged lateral surface ( 52 ), over which the socket ( 32 ) in the circumferential direction of the stator element ( 12 ) on the one component ( 12 ) is supportable. Fastening arrangement according to claim 5, characterized in that the outer peripheral side surface ( 52 ) is polygonal or oval. Fastening device according to one of the preceding claims, characterized in that the one component ( 12 ) by means of at least one third component ( 24 . 40 ), in particular an elastic third component ( 40 ), in the axial direction against the other component ( 12 ) is tense.

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