CN112739926A

CN112739926A - Drive module with gearbox side supporting bearing device

Info

Publication number: CN112739926A
Application number: CN201980061064.3A
Authority: CN
Inventors: 德克·雷姆尼茨; 卡尔-路德维格·基米希
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2018-10-23
Filing date: 2019-10-15
Publication date: 2021-04-30
Also published as: DE102018126286A1; WO2020083430A1; KR20210066830A; EP3870872A1

Abstract

The invention relates to a drive module (10) in a vehicle drive train, comprising a clutch device (17) for transmitting torque to a downstream gearbox, a module housing (27) in which an electric motor (20) is arranged, a rotatable first part (23) and a second part (25), a first bearing arrangement (26) which is arranged between the first part (23) and the second part (25) and supports the first part (23) on the second part (25) in the radial and axial direction, wherein a second bearing arrangement (44) is provided, which is arranged between a third part (58) associated with the clutch device (17) and a fourth part (60) associated with the gearbox and supports the third part (58) radially on the fourth part (60).

Description

Drive module with gearbox side supporting bearing device

Technical Field

The present invention relates to a drive module in a vehicle drive train according to the preamble of claim 1.

Background

A drive module is known, for example, from DE 102016207104 a 1. It comprises an electric motor with a rotor and a clutch device with a separating clutch and a multiple clutch. The rotor is mounted on a rotor carrier, which is mounted together with the separating clutch and the multiple clutch in a common bearing position, which is designed as two rolling bearings, which are supported on the same bearing bracket.

In DE 102016221948 a1, the rotor is supported by a central bearing point arranged between a bearing bracket and an intermediate shaft.

In the case of a support by means of a central bearing point, the bearing point and the associated components must be designed with sufficient rigidity and strength. This results in an increased weight and requires more construction space, which increases costs.

Disclosure of Invention

The object of the invention is to improve a drive module.

At least one of these objects is solved by a drive module having the features of claim 1. Accordingly, a drive module in a vehicle drive train is proposed, which has a clutch device for transmitting a torque to a rear gearbox, a module housing, an electric motor with a rotor, a rotatable first part and a second part, a first bearing arrangement and a second bearing arrangement which are arranged between the first part and the second part and support the first part on the second part in the radial and axial direction, which are arranged between a third part associated with the clutch device and a fourth part associated with the gearbox and support the third part on the fourth part in the radial direction.

In this way, a reliable support of the drive module is achieved and radial movability is prevented, limited or reduced between the third part and the fourth part. Furthermore, tilting of the rotor or of a component connected thereto can be prevented, limited or reduced. Furthermore, the components associated with the first bearing device can be designed to be smaller, lighter and less costly. But also the construction space can be reduced.

The radial support may have a gap in the radial direction. Between the second bearing means and the respective connecting part, there may be a fitting clearance of a size between 0.002 and 0.6mm, preferably between 0.02 and 0.3 mm. The third and fourth parts are movable relative to each other in a radial direction. In this way, the assembly of the drive module can be simplified. Radial movement can occur within a specified range of maximum radial displacement, wherein any radial movement beyond this range is supported by the second bearing means.

The first support bearing means may have one support bearing. The first support bearing device may likewise have two or more support bearings. The second support bearing means may have one support bearing. The second bearing device may likewise have two or more bearing elements. The support bearings may be radial ball bearings, needle bearings, cylindrical roller bearings or the same type of bearing.

The clutch device can be designed dry or wet.

The first part can be fixedly connected, in particular detachably connected, to the third part.

In a preferred embodiment of the invention, the third part or a part connected thereto and the fourth part or a part connected thereto are axially displaceable relative to each other. The third member may be a member which is fitted directly with the clutch device.

In a further preferred embodiment of the invention, the second bearing device is designed to be primarily responsible for supporting radial forces, in particular only for supporting radial forces.

The second bearing device can be fixed axially to the third and/or fourth component. There may be axial movability between the third part and the other part connected thereto. Between the fourth component and the other component connected thereto, axial movability may be present. Between the second bearing means and the third and/or fourth part, there may be an axial movability. By means of this axial displaceability, axial tolerances, elastic deformations and/or thermal expansions can be compensated. Furthermore, by means of the axial displaceability described above, a mounting interface can be realized, by means of which the gearbox and the clutch device, or the clutch device and other components of the drive module (for example an electric motor) can be connected together.

In a very preferred embodiment of the invention, the actuating force generated when the clutch device is actuated is supported by the first bearing means and the second bearing means is located outside the direct influence range of the supporting action of the actuating force.

In a special embodiment of the invention, the first component is a rotor of the electric motor or a component connected thereto. The rotor may be supported directly by the first support bearing means. The rotor can likewise be supported by the first bearing device via a component connected thereto.

The rotor can be completely statically fixed in the radial direction and in the axial direction by means of the first bearing means. The second bearing device can have a statically redundant bearing effect, which can be realized very practically and advantageously by the elasticity of the parts interacting with the first and second bearing devices.

In a special embodiment of the invention, the second component is the module housing or a component connected thereto.

In another particular embodiment of the invention, the third part is a clutch cover or a part fixedly connected thereto, or a counter pressure plate or a part fixedly connected thereto, or a central plate or a part fixedly connected thereto. The third part can be fixedly connected to the other part of the clutch device, for example by riveting.

In a special embodiment of the invention, the fourth component is a gearbox housing or a component connected thereto, or a component of a gearbox input shaft or an actuator.

In a preferred embodiment of the invention, the clutch device comprises a multiple clutch and/or a separating clutch.

The separating clutch allows torque transmission between a drive element, for example an internal combustion engine, and the electric motor and/or a clutch input of the multiple clutch.

A double clutch allows torque transmission between a drive element, for example an internal combustion engine and/or an electric motor, and a gearbox.

The first part can be fixedly connected to a part of the separating clutch or a part of the multiple clutch or to a common part of the separating clutch and the multiple clutch. The first part may be connected to a part of the rotor of the motor.

The third part can be fixedly connected to one part of the separating clutch or one part of the multiple clutch or to a common part of the separating clutch and the multiple clutch. The third part can be fixedly connected to the rotor of the electric motor via a part of the separating clutch or via a part of the multiple clutch or via a common part of the separating clutch and the multiple clutch.

In a special embodiment of the invention, the second bearing means is arranged axially between the first bearing means and the gearbox.

The first and second support bearing means may be axially separated from each other by at least one radially extending member. The component may be a disc carrier or a clutch driven disc. The components can be connected to a shaft in a form-fitting manner.

The second bearing device may be arranged axially in a region between the rotor and the gearbox. The second bearing device can be arranged at a distance from the rotor in the axial direction.

Further advantages and advantageous embodiments of the invention emerge from the description of the figures and the figures.

Drawings

The present invention will be described in detail below with reference to the accompanying drawings. Wherein:

FIG. 1: in a special embodiment of the invention the drive module is half-sectioned.

FIG. 2: in another particular embodiment of the invention the drive module is half-sectioned.

FIG. 3: in another particular embodiment of the invention the drive module is half-sectioned.

FIG. 4: in another particular embodiment of the invention the drive module is half-sectioned.

FIG. 5: in another particular embodiment of the invention the drive module is half-sectioned.

FIG. 6: in another particular embodiment of the invention the drive module is half-sectioned.

Detailed Description

Fig. 1 shows a half-section of a drive module 10 in a particular embodiment of the invention. The drive module is arranged in the drive train of the vehicle between a drive element, for example an internal combustion engine and a gearbox. The drive element transmits the torque via a shaft, for example a crankshaft 12, to a dual mass flywheel 14 which is connected in a form-fitting manner to a drive shaft 16.

The drive shaft 16 transmits the torque to a clutch device 17, which comprises a separating clutch 18, also referred to as the K0 clutch. The disconnect clutch 18 may transmit torque between the drive shaft 16 and an electric motor 20. The electric motor 20 comprises a stator 21 and a rotor 22 with a rotor support 24. Between a rotatable first part 23 (here the rotor carrier 24) and a second part 25 (here a two-part module housing 27), a first bearing arrangement 26 is arranged, which supports the first part 23 axially and radially on the second part 25. The electric motor 20 is supported in the module housing 27.

The first bearing arrangement 26 comprises two bearing bearings 28 (here angular contact ball bearings) which are arranged between the rotor 22 and the module housing 27. For this purpose, the support bearing 28 is supported on an axial section 30 of the module housing 27. The rotor carrier 24 has a shoulder 32 for an actuating device 34 of the separating clutch 18.

The disconnect clutch 18 includes a counter pressure plate 36 bolted to the rotor 22 and a clutch cover 38. The clutch cover 38 is bolted to a center plate 40 and another clutch cover 42. In general, the clutch cover 42, the center plate 40, the clutch cover 38, and the rotor 22 are supported on the module case 27 by the first support bearing means 26.

The center plate 40 is associated with a compound clutch 46 which transmits torque from the motor 20 and/or drive unit to the transmission. For this purpose, the multiple clutch 46 has a first partial clutch 48 and a second partial clutch 50. The first partial clutch 48 is connected to a first transmission input shaft 52 (here a solid shaft), and the second partial clutch 50 is connected in a form-locking manner via a second transmission input shaft 54 (here a hollow shaft). The first gearbox input shaft 52 is supported on the drive shaft 16 via a guide bearing 53. The second transmission input shaft 54 is centered on the first transmission input shaft 52 by a needle bearing 55.

The dual clutch 46 is actuated by an actuating device 56 having an actuating housing 57. The actuating housing 57 may be coupled to a transmission housing. The actuating device is in particular a CSC actuating device (hydraulic actuating system with concentric servo cylinders).

Furthermore, a second bearing device 44 is designed with a bearing 45 (here a radial ball bearing) which is arranged between a third part 58 (here the central plate 40) directly associated with the clutch device 17 and a fourth part 60 (here the second transmission input shaft 54) directly associated with the transmission and supports the third part 58 radially on the fourth part 60.

In this way, a secure mounting of the drive module 10 is achieved and radial displaceability between the third part 58 and the fourth part 60 is prevented, limited or reduced. Furthermore, tilting of the rotor 22 and components connected thereto may be prevented, limited or reduced. Furthermore, the components associated with the first support bearing assembly 26 may be designed to be smaller, lighter and less costly. The installation space required for the drive module 10 can be further reduced.

The third member 58 and the first member 23 are fixedly coupled together by the clutch cover 38. There may be a releasable connection, such as a bolt connection here.

The second bearing device 44 is used here in particular only for supporting radial forces. The radial support by the second bearing device 44 can have play in the radial direction. The fourth part 60 can be moved in the axial direction relative to the support bearing 45, wherein a sliding base is provided. In this way, the assembly of the gearbox with the clutch device 17 can be achieved in that the second gearbox input shaft 54 can be pushed into the support bearing 45. There may be a fit clearance between the support bearing 45 and the second gearbox input shaft 54, simplifying assembly. The size of the fitting clearance may be between 0.002 and 0.6 mm. Furthermore, axial tolerances or axial deformations can be compensated for by the sliding base. The support bearing 45 and the third member 58 are fixedly coupled together in the axial direction by a snap ring 62.

The actuating force which is generated when the clutch device 17 (here the separating clutch 18) is actuated by means of the actuating device 34 and the multiple clutch 46 is actuated by means of the actuating device 56 is supported on the module housing 27 by means of the first bearing device 26. Here, the second bearing means 44 is located outside the direct influence range of the supporting action of the actuating force.

The second bearing means 44 is arranged axially between the first bearing means 26 and the gearbox. The first bearing device 26 and the second bearing device 44 are axially separated from one another by at least one radially extending component, here a clutch disk 64 of the separating clutch 18 and a clutch disk 66 of the multiple clutch 46. The second bearing means 44 may be arranged axially between the rotor 22 and the gearbox in one region. The second bearing device 44 is axially spaced from the rotor 22.

Fig. 2 shows a half-section of a drive module 10 in another particular embodiment of the invention. A support sleeve 68 is fastened to the central plate 40, in particular by a rivet connection 70. The bearing bush 68 has an axial section 72 in the radial direction in the second transmission input shaft 54. Between the bearing bushing 68 designed as the third component 58 and the second gearbox input shaft 54 designed as the fourth component 60, the second bearing arrangement 44 with the bearing 45 is arranged. The support bearing 45 is a needle bearing.

The bearing support 45 is pressed radially on the inside against the second transmission input shaft 54, which is designed as a hollow shaft. Between the support bearing 45 and the support sleeve 68 there is a sliding base with a fitting clearance of between 0.005 and 0.4 mm.

In order to simplify the assembly of the second transmission input shaft 54, which is associated with the transmission, to the clutch device 17, a mounting sleeve 74 is fastened axially to the second transmission input shaft 54 next to the bearing 45, which can facilitate the insertion of the third component 58 into the second transmission input shaft 54 by means of a conical design. In addition, the mounting bushing 74 can center the second transmission input shaft 54 relative to the bearing bushing 68 before the bearing bushing 68 is pushed into the second transmission input shaft 54. In this way, damage to the support bearing 45 can be avoided. During operation, the centering is actually achieved by the support bearing 45, so that additional friction, which may occur due to contact between the mounting sleeve 74 and the support sleeve 68, is avoided.

Fig. 3 shows a half-section of a drive module 10 in another particular embodiment of the invention. The clutch device 17 is supported on the second transmission input shaft 54 via the second bearing device 44. The second bearing arrangement 44, which contains the bearing 45, is arranged between a bearing bush 68, which is fixedly connected to the clutch cover 42, and the second transmission input shaft 54, and supports the bearing bush 68, which is designed as the third component 58, on the second transmission input shaft 54, which is designed as the fourth component 60.

The bearing bush 68 is arranged axially between the clutch disk 66 of the multiple clutch 46 and a lever spring 76 of the actuating device 56 and has an axial section 72, into the interior of which the bearing 45 is pressed. On the end face of the axial section 72, a mounting sleeve 74 is attached, which, due to its conical design, makes it easier to insert the second transmission input shaft 54 into the clutch device 17. In this way, the connection of the gearbox to the clutch device 17 can be simplified.

The second bearing device 44 is arranged radially inside an actuating abutment 78 of the actuating device 56. Here, the support bearing 45 can axially overlap the actuating support 78. There may also be some axial offset between the support bearing 45 and the actuator support 78.

Fig. 4 shows a half-section of a drive module 10 in another particular embodiment of the invention. Similarly to the embodiment in fig. 3, a bearing bush 68 is provided, the axial section 72 of which extends in the direction of the transmission and on the radially outer side of which the second bearing device 44 is arranged. The third part 58 is formed by the bearing bush 68 connected to the clutch cover 42, and the fourth part 60 is formed by the gearbox housing 80 associated with the gearbox.

The axial portion 72 passes radially inside the actuating device 56 and extends axially along the actuating device 56. The fixed position of the support sleeve 68 and the clutch cover 42 is on one axial side of the actuator 56, and the support bearing 45 is on the opposite axial side of the actuator 56.

By increasing the distance between the first bearing means 26 and the second bearing means 44, a large lever arm can be created, achieving the desired support, avoiding tilting, while overcoming radial forces.

Fig. 5 shows a half-section of a drive module 10 in another particular embodiment of the invention. The second bearing device 44 is arranged radially outside the actuating device 56. The support bearing 45 is mounted radially on the inside on a support sleeve 82, which is fixed to the transmission housing 80, and radially on the outside on a support sleeve 68, which is fixedly connected to the clutch cover 42. It is likewise possible for a plurality of bearing elements to be arranged in the circumferential direction and connected to the clutch cover 42, or for the bearing elements formed by the clutch cover 42 to be supported on the second bearing device 44.

A sliding base with clearance is located between the support bearing 45 and the support element 68. This is advantageous if the forces transmitted in the radial direction in the second bearing means 44 are intended to surround the clutch cover 42. This is also particularly suitable for achieving a large fit gap of between 0.1mm and 0.6mm if the force and the clutch are surrounded together. The support bearing 45 can likewise be fixedly connected to the clutch cover 42 or the support sleeve 68, and a sliding base can be present between the support bearing 45 and the support sleeve 82 or the clutch housing 80.

It is likewise possible to arrange the second bearing device 44 on the actuating housing 57 of the actuating device 56 connected to the clutch housing 80, wherein the actuating housing 57 (here the CSC housing) is designed as the fourth component.

Fig. 6 shows a half-section of a drive module 10 in another particular embodiment of the invention. The counter pressure plate 36 of the separating clutch 18 is designed as the third component 58, which is supported radially on the first transmission input shaft 52 (here a solid shaft) designed as a fourth component 60 by means of the second bearing device 44. The second bearing device 44 is formed by a bearing 45, which is designed as a needle bearing.

Description of the reference numerals

10 drive module

12 crankshaft

14 dual mass flywheel

16 drive shaft

17 Clutch device

18 disconnect-type clutch

20 electric motor

21 stator

22 rotor

23 first part

24 rotor support

25 second part

26 support bearing device

27 Module housing

28 support bearing

30 axial segment

32 convex shoulder

34 actuating device

36 reverse pressure plate

38 clutch cover

40 center board

42 Clutch cover

44 bearing device

45 support bearing

46 double clutch

48-minute clutch

50 minute clutch

52 gearbox input shaft

53 guide bearing

54 gearbox input shaft

55 needle roller bearing

56 actuating device

57 actuating housing

58 third part

60 fourth component

62 clasp

64 clutch driven plate

66 clutch driven disc

68 bearing bushing

70 rivet connection

72 axial segment

74 assembling shaft sleeve

76 lever spring

78 actuating support

80 Transmission housing

82 support shaft sleeve

Claims

1. A drive module (10) in a vehicle drive train has

A clutch device (17) for transmitting torque to a downstream gearbox,

a module housing (27),

an electric motor (20) with a rotor (22),

a rotatable first part (23) and a second part (25),

first bearing means (26) arranged between the first part (23) and the second part (25) and supporting the first part (23) on the second part (25) in a radial and axial direction,

it is characterized in that the preparation method is characterized in that,

a second bearing arrangement (44) is provided, which is arranged between a third part (58) associated with the clutch device (17) and a fourth part (60) associated with the gearbox and radially supports the third part (58) on the fourth part (60).

2. Drive module (10) according to claim 1, characterized in that the third part (58) or a part connected thereto and the fourth part (60) or a part connected thereto are axially movable relative to each other.

3. The drive module (10) according to claim 1 or 2, characterized in that the second bearing device (44) is primarily responsible for supporting radial forces, in particular only for supporting radial forces.

4. The drive module (10) according to one of the preceding claims, characterized in that the actuating force generated upon actuation of the clutch device (17) is supported by the first bearing arrangement (26) and the second bearing arrangement (44) is located outside the direct influence range of the supporting action of the actuating force.

5. The drive module (10) according to one of the preceding claims, characterized in that the first component (23) is the rotor (22) of the electric motor (20) or a component fixedly connected thereto.

6. Drive module (10) according to one of the preceding claims, characterized in that the second component (25) is the module housing (27) or a component fixedly connected thereto.

7. Drive module (10) according to one of the preceding claims, characterized in that the third component (58) is a clutch cover (42) or a component fixedly connected thereto, or a counter pressure plate (36) or a component fixedly connected thereto, or a center plate (40) or a component fixedly connected thereto.

8. Drive module (10) according to one of the preceding claims, wherein the fourth component (60) is a gearbox housing (80) or a component fixedly connected thereto, or a component of a gearbox input shaft (52, 54) or an actuating device (34, 56).

9. The drive module (10) according to one of the preceding claims, characterized in that the clutch device (17) comprises a double clutch (46) and/or a disconnect clutch (18).

10. The drive module (10) according to one of the preceding claims, characterized in that the second bearing means (44) is arranged axially between the first bearing means (26) and the gearbox.