DE102018130432A1 - Hybrid module with space-optimized clutch and with play-free and detachable actuator connected to a crankshaft - Google Patents

Abstract

The invention relates to a hybrid module (1) for a drive train (2) of a motor vehicle, with a separating clutch (3) which has a first clutch component (4) on the input side, which is rotationally coupled or rotatable with a crankshaft (5) of an internal combustion engine, and a second one on the output side Coupling component (6), which can be rotatably coupled or rotatably coupled to a rotor (7) of an electric machine (8), and has at least one clutch disc (9) for the frictional rotational coupling of the first coupling component (4) to the second coupling component (6), and with one Actuating device (10) for adjusting the separating clutch (3) between an engaged position and a disengaged position, the separating clutch (3) being designed as a normally engaged clutch, the first clutch component (4) being connected to the crankshaft (5) for torque transmission Coupled cover (11), the non-rotatably via an intermediate adapter (12) with the K crankshaft (5) is connected.

Description

The invention relates to a hybrid module for a drive train of a motor vehicle, with a separating clutch that has a first clutch component on the input side, which is rotationally coupled or can be rotationally coupled to a crankshaft of an internal combustion engine, and on the output side a second clutch component that is rotatably mounted to the first clutch component and that is rotationally coupled to a rotor of an electric machine or can be rotatably coupled, and has at least one clutch disc for frictionally rotationally coupling the first clutch component to the second clutch component, and with an actuating device for adjusting the clutch between an engaged position and a disengaged position, the clutch as a normally engaged clutch (normally-closed clutch ) is trained.

Hybrid modules are already known from the prior art. For example, the unpublished patent applications disclose DE 10 2018 120 838 A1 , DE 10 2018 120 846 A1 , DE 10 2018 120 849 A1 and DE 10 2018 120 850 A1 a hybrid module.

However, the prior art always has the disadvantage that high alternating torques (up to 1600Nm) occur, particularly in the case of separating clutches without an upstream vibration damper. The solutions known to date from the prior art do not meet the requirements with regard to saving space or absorbing alternating torques.

It is therefore the object of the invention to avoid or at least to reduce the disadvantages of the prior art. In particular, a hybrid module with a separating clutch is to be provided, the separating clutch being designed to be particularly space-saving and to be easy to manufacture and assemble / detachable, which, even with high alternating torques, ensures rattle-free torque transmission, i.e. to ensure a slip-free / low-slip transmission.

The object of the invention is achieved according to the invention in a generic device in that the first clutch component has a cover coupled to the crankshaft for torque transmission, which is connected to the crankshaft in a rotationally fixed manner via an intermediate adapter.

This has the advantage that a conventional crankshaft interface, as is known from the prior art, can be retained, while at the same time ensuring that the moments from the crankshaft to the separating clutch, in particular the cover, are transmitted as radially as possible. A particularly space-saving, functional and easy to manufacture connection of the crankshaft to the cover is thus provided.

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

In addition, it is preferred if the intermediate adapter is fastened to the cover by a releasable connection, preferably a play-free connection. This advantageously ensures that the hybrid module can be installed. A detachable connection via a serration for the rotationally fixed coupling of the intermediate adapter to the cover has proven to be particularly advantageous. As a result, even high alternating torques can be transmitted without play or at least with little play. Alternatively, the detachable connection can be implemented, for example, as a polygon connection, a spline connection, a key connection or a cone connection.

According to an advantageous embodiment, the intermediate adapter can be fixed to the cover in the axial direction via a central screw, preferably inserted into the intermediate adapter from a side of the intermediate adapter that faces away from the crankshaft. This has proven to be a space-saving, robust connection.

In addition, it is advantageous if the actuating device is designed as a concentric clutch release, which has an actuator housing, a pressure chamber formed by the actuator housing, a piston axially displaceably arranged in the pressure chamber and an actuating bearing axially fixedly coupled to the piston for adjusting the separating clutch. Such hydraulically actuated clutch release cylinders / clutch slave cylinders (Concentric Slave Cylinder, CSC) are particularly suitable since a relatively low operating pressure is required to actuate the clutch.

In a preferred embodiment, drag torque support can be radially within the pressure space, i.e. be arranged radially inside the piston. This enables the piston to be designed with a relatively large piston area, which has a positive effect on the required operating pressure.

According to a preferred development, the actuating device can be supported on the cover via a cover bearing, the actuating bearing for adjusting the separating clutch of the actuating device and the cover bearing being arranged radially nested, ie arranged radially to one another. In other words, they are Bearing arranged radially spaced. This means that the actuating bearing is arranged radially outside the cover bearing. The actuating bearing is therefore arranged at the same axial height as the cover bearing. As a result, the actuating bearing and the cover bearing can be integrated in the hybrid module in a space-saving manner, particularly in the axial direction.

Alternatively, the actuation bearing (release bearing) and the cover bearing can be arranged axially, i.e. directly next to each other in the axial direction and at the same height in the radial direction. Although a larger axial installation space is required, identical parts can be used for the two bearings, which has an advantageous effect on the manufacturing costs.

It is also advantageous if a support ring fixes the actuating bearing on the cover in the axial direction. As a result, the support ring serves on the one hand as a transport lock for the actuating device and, on the other hand, in the installed state it ensures the transmission of the actuating forces from the actuating device via the intermediate adapter to the separating clutch. The support ring is preferably designed in an open and radially prestressed form in the installed state. The support ring is thus arranged on a radial outer circumference of the intermediate adapter and / or the cover, in particular in the axial region of the releasable connection. The support ring is thus supported in the axial direction on the cover bearing and on the intermediate adapter.

In other words, the invention relates to a hybrid module with a disconnect clutch. According to the invention, the separating clutch is designed as a normally engaged clutch (normally-closed clutch). An actuating device / an actuator system is formed by a concentric slave cylinder which is fastened to a cover of the separating clutch. The isolating clutch is actuated by a CSC that is connected to the cover. A cover bearing and an actuating bearing / release bearing are preferably arranged radially spaced apart from one another. An intermediate element / adapter ensures a mountable and detachable connection without play for introducing alternating torques from a crankshaft into the separating clutch.

• 1 eine Längsschnittdarstellung eines erfindungsgemäßen Hybridmoduls in einem ersten Ausführungsbeispiel, und
• 2 einen Ausschnitt einer Längsschnittdarstellung des Hybridmoduls in einem zweiten Ausführungsbeispiel.

The invention is explained below with the aid of drawings. Show it:

• 1 a longitudinal sectional view of a hybrid module according to the invention in a first embodiment, and
• 2nd a section of a longitudinal sectional view of the hybrid module in a second embodiment.

The figures are only schematic in nature and serve only to understand the invention. The same elements are identified by the same reference symbols.

1 shows a hybrid module according to the invention 1 for a powertrain 2nd of a motor vehicle in a first embodiment. The hybrid module has a disconnect clutch 3rd on. The disconnect clutch 3rd has a first coupling component on the input side 4th with a crankshaft 5 an internal combustion engine is rotationally coupled or can be rotationally coupled. Furthermore, the clutch has 3rd a second coupling component on the output side 6 with a rotor 7 an electric machine 8th is rotatably coupled or rotatable. In the exemplary embodiment shown, the separating clutch is designed as a single-disk clutch and has a clutch disk 9 for frictionally rotating coupling the first coupling component 4th with the second coupling component 6 .

The hybrid module 1 has an actuator 10th to adjust the disconnect clutch 3rd between an indented position and a disengaged position. The disconnect clutch 3rd is designed as a normally engaged clutch, ie the separating clutch 3rd is closed in an unactuated state.

The first coupling component 4th has one with the crankshaft 5 lid coupled for torque transmission 11 on. The lid 11 is via an intermediate adapter 12 with the crankshaft 5 connected. This means that a crankshaft interface must be connected to the cover 11 cannot be adjusted. The intermediate adapter 12 is via a detachable connection 13 on the lid 11 attached. The detachable connection 13 is in the illustrated embodiment by a serration 14 between the lid 11 and the intermediate adapter. Alternatively, however, a polygon connection, a spline connection, a key connection or a cone connection can also be used for releasable attachment, even if this is not shown in the exemplary embodiment shown. The intermediate adapter 12 is about a central screw 15 axially fixed on the lid 11 appropriate.

The actuator 10th is via a cover bearing 16 on a radial outside of the lid 11 supported. The lid 11 is to the actuator 10th rotatably mounted. The cover bearing 16 lies in the axial direction on one side on a shoulder of the cover 11 at. In the axial direction on the other side is the cover bearing 16 through a support ring 17th supported. The support ring 17th is therefore in the axial direction on one side on an inner ring of the cover bearing 16 and in the axial direction on the other side on the intermediate adapter 12 at. This will make the cover bearing 16 axially opposite the lid 11 set so that the operating forces of the actuator 10th on the disconnect clutch 3rd can be transferred. The support ring 17th also serves as a transport lock, as it is installed in the drive train 2nd the pre-assembled unit of the actuator 10th and the disconnect clutch 3rd holds together. In the illustrated embodiment, the support ring 17th designed in an open and radially prestressed form when installed.

The actuator 10th is as a concentric clutch release 18th educated. The clutch release 18th has an actuator housing 19th , one through the actuator housing 19th formed, annular pressure chamber 20th , one in the pressure room 20th axially displaceable, annular pistons 21 as well as one with the piston 21 axially coupled actuation bearing 22 on. The pressure chamber 20th hydraulic fluid applied to the piston 21 to move axially. Due to the axial displacement of the piston 21 becomes the actuation bearing 22 shifted in the axial direction, which is the actuation / adjustment of the clutch 3rd evokes. A drag torque support 23 for the piston 21 is radial within the pressure chamber 20th arranged. The drag torque support 23 is radially outside of the actuation bearing 22 arranged.

In the in 1 illustrated embodiment are the cover bearing 16 and the operating bearing 22 arranged radially nested. That is, the cover bearing 16 and the operating bearing 22 are arranged radially to one another. The cover bearing 16 is radially inside the actuation bearing 22 arranged. The cover bearing 16 and the operating bearing 22 are therefore axially at the same height, ie without an axial gap between them. In the in 1 illustrated embodiment are the cover bearing 16 and the operating bearing 22 as axial angular contact ball bearings 24th educated.

On the lid 11 is a pressure plate 25th relatively displaceable along an axis of rotation 26 arranged. The pressure plate 25th is over a tie rod 27th on the lid 11 tied up. The tie rod 27th is about several leaf springs combined into leaf spring packages 28 on the lid 11 supported. The leaf springs 28 are essentially aligned in the circumferential direction and in the axial direction between that of the tie rod 27th and the lid 11 clamped that they have an axial preload of the tie rod 27th and thus the pressure plate 25th depending on the direction of rotation of the cover 11 relative to the clutch disc 9 the disconnect clutch 3rd produce.

For actuating the disconnect clutch 3rd is the pressure plate 25th over the tie rod 27th with a disc spring 29 connected. The disconnect clutch 3rd is therefore designed as a drawn clutch. The leaf springs 28 are radially outside the disc spring 29 arranged. The disc spring acts on a radially inner area 29 the hydraulic clutch release 18th the actuator 10th adjusting one. The clutch release 18th is with a towing anchor 30th / Pressure pot connected. The disc spring 29 is pivotable on the towing anchor 30th recorded and thus transmits an axial displacement of the towing anchor 30th on the tie rod 27th , which in turn the axial displacement to the pressure plate 25th passes on.

Since the clutch is designed as a normally engaged clutch, the plate spring is 29 is in its starting position on the towing anchor 30th supported that they are the pressure plate 25th against the clutch disc 9 and this in turn against a cover-tight counter pressure plate 31 , forming a frictional connection between the clutch disc 9 and the lid 11 , presses. To disengage the disconnect clutch 3rd , ie for moving the clutch 3rd from its engaged to its disengaged position, the actuator acts accordingly 10th in an activated state on the disc spring 29 a. On the lid 11 is an encoder contour 32 / Bearing ring contour attached.

The clutch disc 9 has a hub area 33 for non-rotatable connection to the second coupling component 6 as well as a covering area 34 for frictionally contacting the first coupling component 4th , especially the counter pressure plate 31 , on. The clutch disc 9 can alternatively be a hub area 33 for non-rotatable connection to the first coupling component 4th as well as a covering area 34 for frictionally contacting the second coupling component 6 exhibit. Here is the hub area 33 radially outside the covering area 34 arranged. The disconnect clutch 3rd is therefore designed as an inverted coupling.

The hub area 33 the clutch disc 9 is fixed to a disc flange 35 appropriate. The disc flange 35 is with an output shaft 36 , like a rotor carrier, firmly connected. The lid 13 is about a support bearing 37 rotatable on the output shaft 36 stored and supported. The output shaft 36 is with the electric machine 8th that have a stator 38 and the rotor 7 has, rotationally coupled. The torque is therefore from the internal combustion engine, via the crankshaft 5 , via the intermediate adapter 12 , via the disconnect clutch 3rd to the output shaft 36 transferred and then to a transmission 39 passed on.

2nd shows a section of a second embodiment of the hybrid module 1 . The 2nd Actuator shown 10th is as a concentric clutch release 18th educated. The clutch release 18th has the actuator housing 19th in the actuator housing 19th trained pressure room 20th in the pressure room 20th sliding piston 21 as well as the operating bearing 22 on. The actuation bearing 22 is with the towing anchor 30th connected. The actuator 10th is on the lid 11 via the cover bearing 16 stored. The actuation bearing 22 and the cover bearing 16 are as axial angular contact ball bearings 24th educated.

In contrast to the one in 1 illustrated embodiment are the actuation bearing 22 and the cover bearing 16 axially adjacent. The actuation bearing 22 and the cover bearing 16 are thus offset from one another in the axial direction and at the same height in the radial direction. So that means that the operating bearing 22 and the cover bearing 16 have the same bearing diameter. This allows identical parts for the actuation bearing 22 and the cover bearing 16 be used.

Reference symbol list

1

Hybrid module

2nd

Powertrain

3rd

Separating clutch

4th

first coupling component

5

crankshaft

6

second coupling component

7

rotor

8th

Electric machine

9

Clutch disc

10th

Actuator

11

cover

12th

Intermediate adapter

13

Detachable connection

14

Serration

15

Central screw

16

Cover bearing

17th

Support ring

18th

Clutch release

19th

Actuator housing

20th

Pressure room

21st

piston

22

Operating bearing

23

Drag torque support

24th

Axial angular contact ball bearings

25th

Pressure plate

26

Axis of rotation

27th

Tie rod

28

Leaf spring

29

Belleville spring

30th

Towing anchor

31

Pressure plate

32

Encoder contour

33

Hub area

34

Surface area

35

Disc flange

36

Output shaft

37

Support bearing

38

stator

39

transmission

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included 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.

Patent literature cited

• DE 102018120838 A1 [0002]
• DE 102018120846 A1 [0002]
• DE 102018120849 A1 [0002]
• DE 102018120850 A1 [0002]

Claims (4)

Hybrid module (1) for a drive train (2) of a motor vehicle, with a separating clutch (3), which has a first clutch component (4) on the input side, which is rotationally coupled or can be coupled to a crankshaft (5) of an internal combustion engine, and a second clutch component (6) on the output side which is rotationally coupled or can be coupled to a rotor (7) of an electric machine (8), and has at least one clutch disc (9) for frictionally rotationally coupling the first clutch component (4) to the second clutch component (6), and having an actuating device (10) for adjusting the separating clutch (3) between an engaged position and a disengaged position, the separating clutch (3) being designed as a normally engaged clutch, characterized in that the first clutch component (4) is coupled to the crankshaft (5) for torque transmission Has cover (11) which is rotatably connected to the crank via an intermediate adapter (12) elwelle (5) is connected. Hybrid module (1) after Claim 1 , characterized in that the intermediate adapter (12) is fastened to the cover (11) by a releasable connection (13, 14, 15). Hybrid module (1) after Claim 1 or 2nd , characterized in that the actuating device (10) is designed as a concentric clutch release device (18) which has an actuator housing (19), a pressure chamber (20) formed by the actuator housing (19), and one axially displaceable in the pressure chamber (20) Piston (21) and an actuating bearing (22) axially fixedly coupled to the piston (21) for adjusting the separating clutch (3), wherein a drag torque support is arranged radially within the pressure chamber (20). Hybrid module (1) according to one of the Claims 1 to 3rd , characterized in that the actuating device is supported on the lid (11) by a cover bearing (16), an actuating bearing (22) for adjusting the separating clutch (3) of the actuating device (10) and the cover bearing (16) being arranged radially nested .

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