阅读说明：本技术 用于机动车的混动模块和驱动装置 (Hybrid module and drive for a motor vehicle ) 是由 弗洛里安·纳赫特曼 于 2020-03-25 设计创作，主要内容包括：本发明涉及一种用于机动车的用于耦联内燃机以及变速器的混动模块和一种用于机动车的驱动装置,所述驱动装置包括根据本发明的混动模块。用于机动车的用于耦联内燃机以及变速器的混动模块(1)包括转子承载件(42)以及与转子承载件(42)基本上抗扭地耦联的从动轴(10),其中混动模块(1)为了实现在转子承载件(42)和从动轴(10)之间的抗扭的耦联而包括圆弧齿联轴器(30)。借助根据本发明的混动模块以及驱动装置能够以构造简单的方式在轴向结构空间需求小的情况下可靠地确保对径向偏移的补偿。(The invention relates to a hybrid module for coupling an internal combustion engine and a transmission for a motor vehicle and to a drive for a motor vehicle, comprising a hybrid module according to the invention. A hybrid module (1) for coupling an internal combustion engine and a transmission for a motor vehicle comprises a rotor carrier (42) and a driven shaft (10) which is coupled to the rotor carrier (42) in a substantially rotationally fixed manner, wherein the hybrid module (1) comprises a spur gear coupling (30) for the purpose of achieving a rotationally fixed coupling between the rotor carrier (42) and the driven shaft (10). The hybrid module and the drive according to the invention make it possible to reliably ensure compensation for radial deviations with a low axial installation space requirement in a constructionally simple manner.)

1. A hybrid module (1) for coupling an internal combustion engine and a transmission for a motor vehicle, comprising a rotor carrier (42) and a driven shaft (10) which is coupled to the rotor carrier (42) in a substantially rotationally fixed manner, wherein the hybrid module (1) comprises a spur gear coupling (30) for the purpose of achieving a rotationally fixed coupling between the rotor carrier (42) and the driven shaft (10).

2. The hybrid module (1) of claim 1,

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

the rotor carrier (42) and also the output shaft (10) each form an internal toothing (13, 44), and the circular-arc gear coupling (30) has a connecting element (33) which connects the internal toothing (44) of the rotor carrier (42) to the internal toothing (44) of the output shaft (10), said connecting element comprising at least one external toothing (34) for engaging into the internal toothing (44) of the rotor carrier (42) and the internal toothing (13) of the output shaft (10).

3. The hybrid module (1) of claim 2,

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

the connecting element (33) is designed as a sleeve.

4. The mixing module (1) according to one of the preceding claims,

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

the output shaft (10) has an output-side connection region (11) for mechanical coupling to a drive output, in particular a transmission, wherein the hybrid module (1) further comprises a rolling bearing (80), in particular a ball bearing, for radial support of the output shaft (10), and the rolling bearing (80) is arranged in the axial direction on the side of the circular-arc toothed coupling (30) opposite the output-side connection region (11).

5. Hybrid module (1) according to claim 4,

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

the hybrid module (1) further comprises an input shaft (70) and a support sleeve (71) which is supported at least in the radial direction on the input shaft (70) and which serves to support the rolling bearing (80) at least in the radial direction.

6. The mixing module (1) according to claim 4 or 5,

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

the connecting element (33) has at least one sealing element (36) on both axial sides for substantially fluid-tight sealing with respect to the rotor carrier (42) and the driven shaft (10), wherein a rolling bearing (80) for radially supporting the driven shaft (10) is also substantially fluid-tight in order to thereby delimit a space for receiving lubricant.

7. The mixing module (1) according to any of claims 4 to 6,

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

the output-side connection region (11) of the output shaft (10) forms one side (23) of a mouse tray (22) for mechanical coupling with an output element (20) having the other side (24) of the mouse tray (2).

8. The mixing module (1) according to any of claims 4 to 7,

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

the hybrid module (1) has a housing wall (61), the wall section (62) of which extends from the axial side of the output-side connection region (11) into the intermediate space between the rotor carrier (42) and the output shaft (10) and the wall section (62) serves to radially support the rotor carrier (42) via a support bearing (82).

9. The mixing module (1) according to one of the preceding claims,

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

the hybrid module (1) further comprises a clutch device (50), wherein the circular-arc tooth coupling (30) is arranged radially and axially at least in sections within a space enclosed by the clutch device (50).

10. Drive device for a motor vehicle, comprising a hybrid module (1) according to at least one of claims 1 to 9 and a drive assembly, in particular an internal combustion engine, and a transmission, wherein the hybrid module (1) is connected on the input side to the drive assembly and on the output side to the transmission.

Technical Field

The invention relates to a hybrid module for coupling an internal combustion engine and a transmission for a motor vehicle and to a drive for a motor vehicle, comprising a hybrid module according to the invention.

Background

A hybrid module according to the prior art generally comprises: a connecting device for mechanically coupling the internal combustion engine; a clutch device, by means of which torque can be transmitted from the internal combustion engine to the hybrid module and by means of which the hybrid module can be decoupled from the internal combustion engine; an output for coupling to a transmission unit; and a motor having a rotor for generating a driving torque.

The electric machine enables electric driving, power augmentation for the operation of the internal combustion engine and energy recovery.

In such hybrid modules, however, a radial offset between the rotational axis of the output shaft of the hybrid module or of the hybrid module and the rotational axis of the input shaft of the transmission unit or of the transmission unit to be coupled can occur. Such radial offsets can occur in particular in so-called additional hybrid modules, i.e. hybrid modules for retrofitting drive trains.

In order to compensate for radial offset, so-called flexplates or flexplate assemblies are known, for example. The hybrid module comprises at least one hub element and an elastic element, wherein the hub element can be fixedly connected with a transmission input shaft and the elastic element is connected with an output element of the hybrid module. The hub element can be designed to have a toothing, for example a splined internal toothing, for connection to the transmission input shaft. The transmission input shaft has correspondingly splined shaft external toothing formed in a mating manner with the splined shaft internal toothing of the hub element. The output element of the hybrid module can be, in particular, a rotor carrier of an electric machine of the hybrid module or be connected to it in a rotationally fixed manner. The spring element can thereby effect a slight winding arrangement or a lateral offset of the shafts relative to one another.

In some transmissions, the transmission input shaft however has a high radial stiffness, so that the insertion of a flexplate or flexplate assembly causes unacceptably high loads in the bearings of the shaft. Furthermore, compensation devices with three corrugated disks, which are arranged one behind the other in the axial direction, are known for solving the problem of radial offset, wherein a first corrugated disk is connected to the output shaft of the hybrid module, a second corrugated disk is connected to the first corrugated disk, and a third corrugated disk is connected to the second corrugated disk and to the transmission input. The connection between the individual bellows discs is correspondingly designed in such a way that radial offset compensation can be achieved.

All known solutions for compensating the radial offset between the output shaft of the hybrid module and the input shaft of the transmission unit must be arranged axially between the hybrid module and the transmission unit and require a corresponding axial installation space there.

Disclosure of Invention

In view of this, it is an object of the present invention to provide a hybrid module and a drive device configured with a hybrid module, which ensure a small axial installation space requirement while reliably compensating for radial offsets in a structurally simple manner.

This object is achieved by a mixing module according to the invention according to claim 1. Advantageous embodiments of the mixing module are given in the dependent claims 2 to 9. In addition, a drive device for a motor vehicle is provided according to claim 10, which has a hybrid module according to the invention.

The features of the claims can be combined in any technically expedient manner and method, wherein the features set forth below and in the figures, which comprise the additional embodiments of the invention, can also be used for this purpose.

The terms axial and radial always refer to the axis of rotation of the hybrid module within the scope of the invention.

The invention relates to a hybrid module for coupling an internal combustion engine and a transmission for a motor vehicle, comprising a rotor carrier and a driven shaft which is coupled to the rotor carrier in a substantially rotationally fixed manner, wherein the hybrid module comprises a spur gear coupling for the rotationally fixed coupling between the rotor carrier and the driven shaft.

That is to say, the driven shaft and the rotor carrier are coupled to one another via a circular-arc tooth coupling.

The spur gear coupling is a non-switchable coupling, by means of which small axial or angular deviations of the machine elements transmitting torque, in the present case the rotor carrier and the output shaft, can be compensated. The first section of the circular-arc tooth coupling is coupled to the rotor carrier or the toothing thereof in a substantially rotationally fixed manner, and the second section of the circular-arc tooth coupling is coupled to the output shaft or the toothing thereof in a substantially rotationally fixed manner.

The hybrid module furthermore advantageously comprises an electric machine having a rotor which is connected in a rotationally fixed manner to the rotor carrier and having a clutch device.

According to a further aspect of the invention, the rotor carrier and also the output shaft each form an internal toothing, and the circular-arc toothed coupling has a connecting element which connects the internal toothing of the rotor carrier to the internal toothing of the output shaft, the connecting element comprising at least one external toothing for engaging into the internal toothing of the rotor carrier and the internal toothing of the output shaft.

The respective internal and/or external toothing of the connecting element is designed spherically in this case in order to be able to achieve an offset of the rotor carrier and the output shaft parallel to the axis of rotation of a shaft connected to the output shaft, in particular of the transmission input shaft. The spherical design of the teeth ensures that the tooth profiles of the rotor carrier and of the circular arc tooth coupling or of the driven shaft and of the circular arc tooth coupling also remain engaged during tilting and/or at least small axial and/or radial excursions.

The connecting element can be designed as a sleeve. This means that the connecting element essentially has the shape of a hollow cylinder, on the radial outer side of which at least one external toothing is realized for engagement into the internal toothing of the rotor carrier and the internal toothing of the driven shaft.

According to a further embodiment, the output shaft has an output-side connection region for mechanical coupling with a driven device, in particular a transmission, wherein the hybrid module further comprises a rolling bearing, in particular a ball bearing, for radial support of the output shaft, and the rolling bearing is arranged in the axial direction on the side of the circular-tooth coupling opposite the output-side connection region. The rolling bearing is preferably a single-row ball bearing in order to be able to achieve tilting of the output shaft caused by a lateral offset of a further shaft, for example a transmission shaft, which is coupled to the output shaft at the connection region of its output side. Due to the described sequence of the axial positions of the rolling bearing, the circular arc tooth coupling and the output-side connection region, the lateral offset of the shaft connected to the output-side connection region and the resulting angular deviation of the axis of rotation of the output shaft from the ideal orientation running coaxially to the connected shaft only act relatively slightly on an offset or inclined position, which is to be compensated by the circular arc tooth coupling.

The connection between the output shaft or the output-side connection region of the output shaft and the shaft connected thereto can be realized indirectly here.

According to a further advantageous embodiment, the hybrid module furthermore has an input shaft and a support sleeve which is supported at the input shaft at least in the radial direction and serves for at least radially supporting the rolling bearing.

The support of the support sleeve on the input shaft can be realized here via a further rotary bearing, in particular a further rolling bearing of a double row.

Furthermore, the support sleeve can also be supported in the radial direction on the rotor carrier by direct mechanical contact.

The input shaft is preferably connected in a rotationally fixed manner to the input side of the clutch device, in the case of a dual clutch device, to the input sides of the two partial clutches of the dual clutch device, and is used for coupling to the internal combustion engine, possibly via a damper.

The output side of the clutch device is coupled in a rotationally fixed manner to the rotor carrier.

According to a further aspect of the hybrid module, the connecting element has at least one sealing element on both axial sides for substantially fluid-tight sealing with respect to the rotor carrier and the driven shaft, wherein the rolling bearing for radially supporting the driven shaft is also substantially fluid-tight in order to thereby delimit the space for accommodating the lubricant.

This makes it possible to retain the lubricant at the teeth. Correspondingly, it is already possible to at least partially fill the space for accommodating the lubricant when the hybrid module is installed.

The lubrication of the toothed segments is advantageous in particular in circular arc tooth couplings when tilting, since in this case, an alternating load acting axially on the teeth of the respective toothed segment occurs at each revolution in the form of a sliding movement of the tooth profiles of the teeth of the toothed segments meshing with one another. The lubricant reduces the friction occurring in this case and accordingly enables a high number of sliding movements over the service life of the circular-arc tooth coupling.

In a further embodiment, the output-side connection region of the output shaft forms one side of the ratchet disk for mechanical coupling with an output element having the other side of the ratchet disk. The mouse teeth disk is an axially acting tooth system with axially projecting teeth, wherein the teeth on both sides of the mouse teeth disk are staggered in the axial direction in order to be able to transmit torque. In particular, the output element can be connected to the transmission input shaft via a profile toothing. Correspondingly, it can be provided that the output-side connection region of the output shaft is connected to the transmission input shaft via the output element.

The profile toothing of the output element can be designed in such a way that tilting can be achieved in the connection between the output element and the transmission input shaft, and thus also in the connection between the output shaft and the transmission input shaft.

Even in the case of a design of the transmission input shaft without a mouse ring, i.e., correspondingly in the case of a design of the hybrid module according to the invention without an output element, the output-side connection region of the output shaft can form such a profile toothing for the achievable tilting between the output shaft and the transmission input shaft.

In one embodiment, the hybrid module has a housing wall which extends from the axial side of the connection region on the output side into the intermediate space between the rotor carrier and the output shaft by means of a wall section for radial support of the rotor carrier via a support bearing.

In a preferred embodiment, it is provided that the housing wall forming the wall section is arranged only on the side of the connection region facing the output side of the output shaft, and that no housing or housing walls are formed on the axially opposite side, so that the hybrid module is not substantially closed by the housing on the side facing the input side or the position facing the internal combustion engine.

According to one embodiment, the hybrid module further comprises a clutch device, wherein the circular-arc tooth coupling is arranged radially and axially at least in sections within the space enclosed by the clutch device.

The clutch device is advantageously arranged at least partially within the space radially enclosed by the rotor carrier.

The hybrid module according to the invention has the advantage that compensation for radial offset between the output shaft of the hybrid module and the input shaft of the transmission unit can be achieved in a constructively simple manner with a small axial installation space.

By tilting the output shaft relative to the rotational axis of the rotor of the electric machine and relative to the rotational axis of the transmission input shaft, a radial offset of the shafts to be coupled to one another can be compensated, wherein the tilting circular-arc tooth coupling is arranged radially and axially at least in regions within the space enclosed by the clutch device, so that no axial installation space is required. The radial offset can be compensated here, in addition, independently of the radial rigidity of the connected transmission input shaft.

Furthermore, according to the invention, a drive device for a motor vehicle is provided, having a hybrid module according to the invention, a drive assembly, in particular an internal combustion engine, and a transmission, wherein the hybrid module is connected on the input side to the drive assembly and on the output side to the transmission.

The output side of the mixing module corresponds here to the connection region of the output side of the output shaft. Alternatively, the output side of the hybrid module can also correspond to an output element which is fixedly connected to the output shaft.

Drawings

The invention described above is explained in detail below in the related art with reference to the associated drawings, which show preferred embodiments. The invention is not limited in any way by the purely schematic view, wherein it is to be noted that the embodiments shown in the figures are not limited to the dimensions shown. Shown in the drawings are:

FIG. 1 shows a cut-away side view of a hybrid module according to the invention, an

Fig. 2 shows an enlarged detail of a mixing module according to the invention in the region of a circular-arc tooth coupling.

Detailed Description

Fig. 1 shows a sectional side view of a hybrid module 1 according to the invention.

The hybrid module 1 includes an input shaft 70, a clutch device 50, a circular arc tooth coupling 30, a motor 40, a driven shaft 10, and a housing 60.

When the hybrid module 1 is integrated into a drive train of a hybrid vehicle, the input shaft 70 serves to couple the hybrid module 1 to an internal combustion engine of the drive train, and the output shaft 10 serves to couple the hybrid module 1 to a transmission unit of the drive train.

The coupling between the internal combustion engine and the input shaft 70 is realized here via a damper 72 which is arranged on the axial side of the input shaft 70 facing the internal combustion engine and is connected to the input shaft 70.

The output shaft 10 is supported in the radial direction on a support sleeve 71 via a roller bearing 80 designed as a single-row ball bearing, wherein the support sleeve 71 is supported in the radial direction on the input shaft 70 via a rotary bearing 81 designed as a double-row ball bearing. The output shaft 10 is therefore indirectly supported radially inwardly on the input shaft 70 in the radial direction via the support sleeve 83.

The input shaft 70 is also connected to the input side 51 of the clutch device 50 in a rotationally fixed manner. The clutch device 50 is arranged radially outside the input shaft 70 and is designed as a twin-disk clutch, wherein the input side 51 of the clutch device 50 is realized in each case by two clutch disks 53 which are connected to the input shaft 70 in a rotationally fixed manner. The output 52 of the clutch device 50 is connected in a rotationally fixed manner to a rotor carrier 42, which serves to rotationally support the rotor 41 of the electric motor 40.

The rotor 41 of the electric motor 40 is arranged on the rotor carrier 42, wherein the stator 45 of the electric motor 40 is fixedly connected to the housing 60. The rotor carrier 42 is supported for rotation of the rotor 41 about the rotational axis 2 of the hybrid module 1 on a wall section 62 of the housing wall 61 of the housing 60 via a support bearing 82. The rotor carrier 42 is supported on the support bearing 82 by means of the rotor carrier section 43, which is formed radially inside and extends in the axial direction. The support sleeve 71 forms a direct mechanical contact 83 on the axial rotor carrier section 43 on the side of the axial rotor carrier section 43 opposite the support bearing 82 in the radial direction.

The housing wall 61 extends in the radial direction on the side of the hybrid module 1 facing the transmission unit, and a wall section 62 extends from a radially inner end of the housing wall 61 in the axial direction locally between the rotor carrier 42 and the driven shaft 10 to support the rotor carrier 42.

For opening or closing the clutch device 50, the hybrid module 1 furthermore comprises a clutch actuation device 54, which is designed as an annular piston-cylinder unit and is arranged on the housing wall 61 or the wall section 62. The clutch actuation device 54 is arranged in the axial direction on the opposite side of the rotor carrier 42 or of a radially extending section of the rotor carrier 42 from the clutch device 50. For actuating the clutch device 50, the clutch actuating device 54 passes through the rotor carrier 42 or a radially extending section of the rotor carrier 42 in the axial direction.

On the motor-side region 12 of the output shaft 10, said output shaft comprises a radially outwardly extending connecting projection 14, wherein the connecting projection 14 is connected to the axially extending rotor carrier section 43 via a circular tooth coupling 30. Accordingly, the rotor carrier 42 is coupled to the output shaft 10 via the spur gear coupling 30. Furthermore, the output shaft 10 is connected at its output-side connection region 11 to the output element 20 via a mouse ring 22 in order to be coupled to an input element of the transmission unit. The output shaft 10 in this case accordingly forms one side 23 of the mouse tray 22, wherein the output element 20 forms the other side 24 of the mouse tray 22. For coupling to an input element of the transmission unit, the output shaft 20 has a profile toothing 21 in order to achieve a rotationally fixed connection to an input shaft of the transmission unit. The torque provided by the internal combustion engine is therefore transmitted via the damper 72 to the input shaft 70 and thus to the input side 51 of the clutch device 50. When the clutch device 50 is closed, the torque of the internal combustion engine is also transmitted to the rotor support 42, wherein the torque is then transmitted via the spur gear coupling 30 to the output shaft 10 and via its output-side connection region 11 and the output element 20 to the input of the transmission. In the opposite direction, the connected internal combustion engine is started when the electric machine 40 is running.

When the clutch device 50 is opened, the torque provided by the electric motor 40 is conducted to the output side via the rotor carrier 42.

The radial offset between the rotational axis 2 of the hybrid module 1 and the rotational axis 3 of the transmission input shaft as an input element of the transmission unit can be compensated for by means of a circular tooth coupling 30.

Fig. 2 shows an enlarged detail of the mixing module 1 according to the invention in the region of the circular-arc tooth coupling 30, as shown in fig. 1.

As can be seen from fig. 2, therefore, in addition to fig. 1, the circular arc tooth coupling 30 comprises a connecting element 33, wherein the connecting element 33 has an outer toothing 34 on its radial outer side 35. The connecting element 33 is designed as a sleeve, which means that the connecting element 33 essentially has the shape of a hollow cylinder.

In the first axial section 31 of the circular arc tooth coupling 30, the internal tooth system 13 of the connecting projection 14 of the driven shaft 10 engages in the external tooth system 34 of the connecting element 33. Furthermore, in the second axial section 32 of the circular-arc tooth coupling 30, the internal toothing 44 of the axial rotor carrier section 43 of the rotor carrier 42 engages in the external toothing 34 of the connecting element 33. Thus, the internal toothing 13 of the driven shaft 10 is connected to the internal toothing 44 of the rotor carrier 42 via the external toothing 34 of the connecting element 33.

Furthermore, the circular arc tooth coupling 30 has two sealing elements 36, wherein in each case one sealing element 36 is arranged on the radial outer side 35 of the connecting element 33 at the first or second axial section 31, 32 of the circular arc tooth coupling 30, and the circular arc tooth coupling 30 is thereby sealed liquid-tight on both axial sides with respect to the rotor carrier 42 or the output shaft 10 in order to fill the circular arc tooth coupling 30 with lubricant.

The respective internal toothing 13, 44 of the output shaft 10 or of the rotor carrier 42 and the external toothing 34 of the connecting element 33 are here spherically designed in order to keep the shafts coupled to one another in engagement with a tilting and/or small axial and/or radial offset, so that a radial compensation between the rotational axis 2 of the hybrid module 1 and the rotational axis of the transmission input shaft (not shown here) can be achieved. A slight tilting of the driven shaft 10 about the centre of the bearing 80 is possible due to the use of only a single row of bearings 80.

The hybrid module and the drive according to the invention make it possible to reliably ensure compensation for radial deviations with a low axial installation space requirement in a constructionally simple manner.

Description of the reference numerals

1 mixing module

2 rotation axis of hybrid module

3 rotational axis of transmission input shaft

10 driven shaft

11 connection region on the output side

12 motor-side region of the driven shaft

13 internal tooth part of driven shaft

14 coupling projection of driven shaft

20 output element

21 profile tooth

22 mouse tooth disk

One side of 23 mouse dental disc

The other side of the mouse tray

30 circular arc tooth coupling

First axial section of 31 circular arc tooth coupling

Second axial section of 32-circular-arc-tooth coupling

33 connecting element

34 external tooth part

35 radially outer side of the connecting element

36 sealing element

40 electric machine

41 rotor

42 rotor carrier

43 axial rotor carrier section

44 internal toothing of a rotor carrier

45 stator

50 clutch device

51 input side of clutch device

52 output side of clutch device

53 clutch disc

54 clutch operating device

60 case

61 casing wall

62 wall section

70 input shaft

71 support sleeve

72 vibration damper

80 rolling bearing

81 swivel bearing

82 support bearing

83 mechanical abutment.