DE102017129265A1 - Intermediate shaft as a support for clutch units - Google Patents

Abstract

The invention relates to a hybrid module (1), with a first drive unit, a second drive unit, which are connected via an intermediate shaft (2) with a drive shaft (3) to transmit torque, wherein a torque from the first drive unit and / or the second drive unit via a Disconnect coupling (4) to the intermediate shaft (2) can be passed, wherein the intermediate shaft (2) via a support bearing (5) on a housing (6) is supported, and a starting element (7), which connected to the drive shaft (3) to transmit torque is, wherein the starting element (7) is firmly connected to the intermediate shaft (2). Furthermore, the invention also relates to a drive train with an internal combustion engine as the first drive unit and an electric motor as a second drive unit and a drive shaft (3), wherein the hybrid module (1) between the drive units on the one hand and the drive shaft (3) on the other hand is arranged.

Description

The present invention relates to a hybrid module, in particular for an axis-parallel hybrid system, for a (hybrid) powertrain of a (hybrid) vehicle, such as a car, a truck or other commercial vehicle, with a first drive unit, such as an internal combustion engine a second drive unit, such as an electric motor, which are connected via an intermediate shaft with a drive shaft torque transmitting connectable, wherein a torque from the first drive unit via a separating clutch to the intermediate shaft is coupled coupled, the intermediate shaft via a support bearing with at least one support bearing is supported on a housing and a starting element, which is connected to transmit torque to the drive shaft, is provided. Furthermore, the invention relates to a drive train with an internal combustion engine as the first drive unit and an electric motor as a second drive unit and a drive shaft, wherein the hybrid module according to the invention between the drive units on the one hand and a drive shaft on the other hand is arranged.

Hybrid modules are to be distinguished in terms of their arrangement structure of the drive units, usually an internal combustion engine and an electric motor. Thus, for example, a P2 arrangement means such an arrangement in which the electric motor is firmly connected to the drive train and the internal combustion engine is connected to the drive train with an intermediate clutch. As a result, the internal combustion engine can be decoupled from the rest of the drive train and the electric drive and the recuperation are in a much more efficient frame, without the loss of drag torque of the engine, possible. Such hybrid modules are then also commonly referred to as P2 hybrid modules.

Furthermore, in hybrid modules, a distinction is made between axis-parallel and coaxial hybrid modules. In paraxial hybrid modules, the output shafts of the two drive units, usually an internal combustion engine and an electric motor, are aligned parallel to one another. In coaxial hybrid modules, these output shafts are coaxial, that is, aligned with each other, arranged. This means they have the same axis of rotation.

The DE 10 2015 211 436 A1 relates to a drive arrangement with an input element for connection to an internal combustion engine and with an electric machine, and with an output element for connecting the drive assembly with a transmission input shaft of a downstream transmission, wherein as a starting element a friction clutch is provided, which couples the rotor of the electric machine with the output member and with a dog clutch which couples the internal combustion engine with the input element of the friction clutch when the friction clutch is closed, wherein an actuating means for the friction clutch and an actuating means for the dog clutch are provided, which are acted upon by an actuating element, wherein the actuating element is displaceable in a first actuating direction, to pressurize the actuating means for actuating the dog clutch and is displaceable in a second actuating direction to the actuating means for Be act on the friction clutch.

In the prior art, single clutches are bolted to the crankshaft (flywheel). The crankshaft bearings take over the storage of the clutch and the actuating forces.

In a dual mass flywheel, the dual mass flywheel bearing takes over the bearing of the assembled clutch. The actuating forces are taken over by the crankshaft bearing.

Double clutches are stored separately because of the larger masses and the very high actuating forces, for example. On a gear shaft or on the transmission wall, etc. All individual units must be mounted separately to the gear housing.

That is, there are currently many separate bearings that require all of the installation space and incur additional costs (due, among other things, to many parts).

The object of the invention is to avoid or at least mitigate the disadvantages of the prior art, and in particular to provide a hybrid module with (additional) separating clutch. In addition, possibilities for connecting the intermediate shaft following clutch / dual clutch / converter, etc. should be provided, which allow the generation of a structural unit. That is, it should be provided for an appropriate storage of a coupling element in a hybrid powertrain.

The object of the invention is achieved in a generic hybrid module according to the invention in that the starting element fixed torque on the input side, that is, torque transmitting, is connected to the intermediate shaft.

As a result, the actuating forces are introduced into the intermediate wall via the support bearing and the crankshaft remains load-free.

Advantageous embodiments are claimed in the subclaims and are explained below.

Thus, it is advantageous if the starting element is designed as a single clutch, a double clutch or as a converter. Thus, the starting element can be selected according to the expected loads during operation. In addition, preferably, a flexplate / flexible disc may be present, which is fastened, for example with the converter housing to the separating clutch. As a result, vibrations are isolated in the axial direction and compensated for an axial tolerance or a radial offset.

Further, it is advantageous if the support bearing, preferably as the only bearing / single storage, for supporting the occurring actuating and / or axial forces of both the separating clutch and the starting element, ie, without the need for a further bearing for receiving these forces, is used , The support bearing is designed for the high radial and axial forces.

It has proven to be advantageous if the support bearing comprises a double-row bearing or an angular contact ball bearing or is designed as a combination of a deep groove ball bearing and an angular contact ball bearing.

Moreover, it is advantageous if the separating clutch is connected via a hub by means of a shaft-hub connection with the intermediate shaft. As a result, the separating clutch can be mounted by means of the hub as a unit on the intermediate shaft.

It is advantageous if the hub is secured against axial displacement by means of a central screw, approximately on the side facing away from the support bearing in the axial direction.

For receiving the resulting forces, it is advantageous if the axial forces of the operation for the separating clutch and / or for the starting element are supported in addition to the support bearing of the central screw.

For the hybrid module, it has proven to be advantageous if the support bearing is designed and installed between a hybrid module supporting the housing and the intermediate shaft, that the actuating forces are passed through the support bearing in the housing. As a result, the crankshaft remains load-free.

For this it has proven to be advantageous if the support bearing is supported on an intermediate wall of the housing.

Furthermore, it is advantageous if the separating clutch is designed as a friction clutch, such as, for example, a multi-plate clutch.

For the drive train, it is advantageous if the second drive unit by means of a belt drive with the separating clutch (via an inner disc carrier) is connected to transmit torque. The first drive unit is preferably connected to the separating clutch (and the outer disk carrier) in a torque-transmitting manner via a dual-mass flywheel.

In other words, the invention consists in that a hybrid head / hybrid module with an additional separating clutch (K0) is provided. The relevant coupling is firmly mounted on the inner shaft of the K0. The K0 support bearing thus takes over the storage of the entire aggregate. Actuating forces are guided via the support bearing in the intermediate wall. The crankshaft remains unloaded. The support bearing (possibly a combination of a deep groove ball bearing and an angular contact ball bearing or a double row bearing) is designed for the high radial and axial forces. This results in a preassembled and tested unit, consisting of the K0 with actuation, a K1, an E-motor - possibly with belt drive and an intermediate housing. As a result, the assembly work in the vehicle plant is reduced.

One can say that according to the invention, an output side of a separating clutch (K0) is fixedly coupled to an intermediate shaft and an input side of a starting / coupling element (K1), such as a clutch, a double clutch, a torque converter or the like, firmly the intermediate shaft is coupled. A bearing, which is provided between the intermediate shaft and a housing, supports the intermediate shaft and therefore at the same time the separating clutch and the starting / coupling element without the need for a further bearing which supports the starting / coupling element. That is, the separating clutch and the starting clutch are stored via a common bearing or a common storage, without the need for a second bearing or a second bearing for the axial forces.

• 1 eine Längsschnittansicht eines Hybridsystems;
• 2 die Längsschnittansicht des Hybridsystems aus 1 in perspektivischer Darstellung;
• 3 eine Längsschnittansicht einer ersten Ausführungsform des Hybridmoduls;
• 4 eine zweite Ausführungsform des Hybridmoduls in Längsschnittansicht; und
• 5 eine Längsschnittansicht der in 4 gezeigten zweiten Ausführungsform des Hybridmoduls mit eingezeichneten Axial- und Kupplungsbetätigungskräften.

The invention will be explained in more detail with the aid of figures, in which different embodiments are shown. Show it:

• 1 a longitudinal sectional view of a hybrid system;
• 2 the longitudinal sectional view of the hybrid system 1 in perspective view;
• 3 a longitudinal sectional view of a first embodiment of the hybrid module;
• 4 a second embodiment of the hybrid module in longitudinal section view; and
• 5 a longitudinal sectional view of in 4 shown second embodiment of the hybrid module with marked axial and clutch actuating forces.

The figures are merely schematic in nature and are only for the understanding of the invention. The same elements are provided with the same reference numerals.

Features of the individual embodiments can also be realized in other embodiments. So they are interchangeable.

The 1 and 2 show a longitudinal section of a hybrid module 1 as a sectional view ( 1 ) or in perspective view ( 2 ). The hybrid module 1 has an intermediate shaft 2 and a separate drive shaft 3 on. The drive shaft 3 serves as a transmission input shaft. Via a separating clutch 4 which is on the intermediate shaft 2 is mounted, it is possible, a first drive unit (not shown) and / or a second drive unit (not shown) to transmit torque with the intermediate shaft 2 connect to. The intermediate shaft 2 is about a support bearing 5 on a housing 6 of the hybrid module 1 supported. With the drive shaft 3 and the intermediate shaft 2 is a starting element 7 , also in the form of a clutch 8th , connected.

The housing 6 has an intermediate wall 9 on, regarding which the hybrid module 1 in an engine side 10 and a transmission side 11 can be split. On the engine side 10 are the first drive unit and the second drive unit, which are not shown here. The first drive unit used, for example, an internal combustion engine, which is mounted on a crankshaft (not shown) of the internal combustion engine via a dual mass flywheel, with an outer disk carrier 13 that as a multi-plate clutch 14 trained separating clutch 4 connected is.

The second drive unit is, for example, in the form of an electric motor, such as an electric motor (not shown), formed and a belt 15 with an inner disc carrier 16 with the separating clutch 4 connected torque transmitting. The separating clutch 4 is a Aus- / Einrückvorrichtung 17 actuated. The plate packs 18 (Friction and steel blades) are a plate spring 19 biased.

The separating clutch 4 is as an entire unit on a hub 20 Arranged over a shaft-hub connection 21 with the intermediate shaft 2 torque transmitting connected. The hub 20 is via a central or locking screw 22 secured against axial displacement.

On the transmission side 11 is the starting element 7 , in the embodiment shown, acting as a single clutch 23 is trained. The single clutch 23 is about a flywheel 24 , which is here made in two parts, with the intermediate shaft 2 connected. Via a clutch disc 25 and a friction element 26 is the single clutch 23 with the drive shaft 3 connected torque transmitting.

The separating clutch 4 Can also be used as K0 clutch and the clutch 8th can also be referred to as K1 coupling. For actuating the release / engagement device 17 the separating clutch 4 shows the case 6 a line 27 on, via the example. A hydraulic fluid can be supplied.

3 shows the hybrid module 1 in a longitudinal sectional view in a first embodiment in which the starting element 7 as the single clutch 23 is executed. The single clutch 23 is via a torque input part 28 firmly with the intermediate shaft 2 connected. In the embodiment shown here, this is via a screw 29 realized. Alternatively, the intermediate shaft 2 and the torque introduction part 28 but also riveted or welded.

The support bearing 5 has two bearings here 30 on, a deep groove ball bearing 31 and an angular contact ball bearing 32 , Alternatively, the support bearing 5 also be designed as a double row bearing. On the engine side 10 are for connection to the first drive unit in the form of an internal combustion engine, a vibration damper 33 as well as the approach of a crankshaft 34 shown.

Because both the separating clutch 4 as well as the starting element 7 firmly with the intermediate shaft 2 connected, takes over the support bearing 5 the axial forces of the clutch actuation of both the disconnect clutch 4 as well as the starting element 7 and forwards these over the intermediate wall 9 in the case 6 one.

4 shows a second embodiment of the hybrid module 1 which differ from the in 3 shown differs in that the starting element 7 as a double clutch 35 is executed. The double clutch 35 is also via a torque input part 36 , which with the intermediate shaft 2 screwed, torque transmitting connected to this. The double clutch 35 is with a first clutch disc 37 via a shaft-hub connection 38 with the drive shaft 3 and a second clutch disc 39 with a hollow shaft 40 about another wave Hub connection 41 connected torque transmitting. The drive shaft 3 and the hollow shaft 40 form part of the transmission input shaft 42 out. Due to the fixed connection of the double clutch 35 with the intermediate shaft 2 eliminates the storage of the double clutch 35 on the gear shaft 42 or on the gearbox housing.

In addition, the dual clutch has 35 a pressure plate 43 , an intermediate plate 44 and a counter pressure plate 45 up and over an actuator 46 actuated.

5 shows the picture 4 with marked axial or clutch actuation forces. The axial forces F7 the clutch operation of the single clutch 23 or the double clutch 35 be from the support camp 32 (the angular contact ball bearing). The axial forces F4 the clutch actuation of the clutch 4 be both from the central screw 22 as well as from the support camp 32 accepted.

LIST OF REFERENCE NUMBERS

1

hybrid module

2

intermediate shaft

3

drive shaft

4

separating clutch

5

storage support

6

casing

7

starting element

8th

clutch

9

partition

10

engine

11

transmission side

12

Dual Mass Flywheel

13

External disk carrier

14

multi-plate clutch

15

belt

16

Inner disk carrier

17

Release / engagement device

18

disk pack

19

Belleville spring

20

hub

21

Shaft-hub-connection

22

Central / locking screw

23

Single Clutches

24

flywheel

25

clutch disc

26

friction

27

management

28

Torque introduction part

29

screw

30

camp

31

Deep groove ball bearings

32

Angular contact ball bearings

33

vibration

34

crankshaft

35

Double coupling

36

Torque introduction part

37

first clutch disc

38

Shaft-hub-connection

39

second clutch disc

40

hollow shaft

41

Shaft-hub-connection

42

Transmission input shaft

43

pressure plate

44

intermediate plate

45

Platen

46

actuator

F4

Axial force of the separating clutch

F7

Axial force of the starting element

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 102015211436 A1 [0004]

Claims (10)

Hybrid module (1), with a first drive unit, a second drive unit, which are connected via an intermediate shaft (2) with a drive shaft (3) to transmit torque, wherein a torque from the first drive unit via a separating clutch (4) to the intermediate shaft (2) coupled, can be passed, wherein the intermediate shaft (2) via a support bearing (5) on a housing (6) is supported, and a starting element (7) which is connected to transmit torque to the drive shaft (3), wherein the starting element (7) fixed is connected to the intermediate shaft (2). Hybrid module (1) according to Claim 1 , characterized in that the starting element (7) as a single clutch (23), a double clutch (35) or as a converter is formed. Hybrid module (1) according to Claim 1 or 2 , characterized in that the support bearing (5) for supporting the occurring actuating and / or axial forces (F4, F7) of both the separating clutch (4) and the starting element (7) is used. Hybrid module (1) according to one of Claims 1 to 3 , characterized in that the support bearing (5) comprises a double-row bearing or an angular contact ball bearing (32) or is formed as a combination of a deep groove ball bearing (31) and an angular contact ball bearing (32). Hybrid module (1) according to one of Claims 1 to 4 , characterized in that the separating clutch (4) via a hub (20) by means of a shaft-hub connection (21) with the intermediate shaft (2) is connected. Hybrid module (1) according to Claim 5 , characterized in that the hub (20) by means of a central screw (22) is secured against axial displacement. Hybrid module (1) according to Claim 6 , characterized in that the axial forces (F4, F7) of the actuation of the separating clutch (4) and / or the starting element (7) in addition to the support bearing (5) by the central screw (22) are supported. Hybrid module (1) according to one of Claims 1 to 7 Characterized in that the supporting bearing (5) is formed, and between a hybrid module (1) overlying the housing (6) and the intermediate shaft (2) is installed so that the actuating forces (F4, F7) on the supporting bearing (5) in the Housing (6) are passed. Hybrid module (1) according to one of Claims 1 to 8th , characterized in that the support bearing (5) on an intermediate wall (9) of the housing (6) is supported. Drive train with an internal combustion engine as the first drive unit and an electric motor as the second drive unit and a drive shaft (3), wherein the hybrid module (1) according to one of the preceding claims between the drive units on the one hand and the drive shaft (3) on the other.

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