DE102019104077A1 - Inner disc carrier - Google Patents

Abstract

There is an inner disk carrier (10) for a disk clutch (42), in particular in a hybrid module (38) intended for coupling an internal combustion engine and an electrical machine to a motor vehicle transmission, provided with a cranked and / or potted disk body (12) for gripping Built-in components and for attachment to a shaft, in particular a transmission input shaft of a motor vehicle transmission, and a toothed body (18) provided separately from the disk body (12) and projecting on both axial sides over a substantially radially extending radial section (14) of the disk body (12) for non-rotatable mounting of lamellae (22) for frictional torque transmission, the toothed body (18) being fastened, in particular welded, to the disk body (12) radially on the outside. By designing the toothed body (18) and the disc body (12) as separate components connected to one another, an otherwise remaining radial gap for receiving a forming tool can be avoided, so that a multi-plate clutch (42) with a small radial space requirement is possible.

Description

The invention relates to an inner disk carrier, with the aid of which disks of a disk clutch provided for frictional torque transmission can be received in a rotationally fixed manner and a shaft can be connected.

Out DE 10 2014 205 570 A1 an inner disk carrier for a disk clutch is known, in which a toothed region for the non-rotatable receiving of disks protrudes in one piece on a potted disk body from an essentially radially extending radial section.

If the radial section of the inner disk carrier should run essentially in the center of the toothed area due to restrictions due to the available installation space, the toothed area can no longer be produced by bending in the axial direction out of the radial plane and the toothed area is required with the help of a deep-drawing tool to be positioned in the desired axial position relative to the radial section during the forming process.

There is a constant need to reduce the space required for multi-plate clutches.

It is the object of the invention to identify measures which enable a multi-plate clutch with a small footprint.

The object is achieved according to the invention by an inner disk carrier with the features of claim 1. Preferred embodiments of the invention are specified in the subclaims and the following description, each of which can represent an aspect of the invention individually or in combination.

According to the invention, an inner disc carrier for a multi-disc clutch, in particular in a hybrid module provided for coupling an internal combustion engine and an electrical machine to a motor vehicle transmission, is provided with a cranked and / or potted disc body for encompassing internals and for fastening to a shaft, in particular a transmission input shaft of a Motor vehicle transmission, and a toothed body provided separately from the disk body and protruding on both axial sides over a substantially radially extending radial section of the disk body for the non-rotatable receiving of disks for frictional torque transmission, the toothed body being attached to the disk body radially on the outside, in particular welded.

Since the inner disk carrier is not designed in one piece, but at least in two parts, it is possible to shape the disk body and the toothed body separately. This makes use of the knowledge that in the case of a one-piece design of the inner disk carrier, if the toothed body is to protrude over the radial section on both axial sides, the deep-drawing tool required for this purpose leaves a receiving pocket between the toothed body and the radial section in which the deep-drawing tool was previously used during forming. Due to the separate design of the disk body on the one hand and the toothed body on the other hand, this receiving pocket can be avoided and a gap between the toothed body and the disk body axially next to a fastening point of the toothed body with the disk body can be minimized, in particular eliminated. The radial space requirement of the inner disk carrier can be reduced as a result. By designing the toothed body and the disk body as separate components connected to one another, an otherwise remaining radial gap for receiving a forming tool can be avoided, so that a multi-plate clutch with a small radial space requirement is possible.

The inner disc carrier can in particular be part of a multi-disc clutch which is installed in a hybrid module provided for coupling an internal combustion engine and an electric machine to a motor vehicle transmission of a hybrid motor vehicle. When a drive train of the hybrid motor vehicle is in pulling mode, a torque can be introduced into the multi-disk clutch via an outer disk carrier and, in the frictionally closed state of the multi-disk clutch, directly or indirectly via the inner disk carrier to a transmission input shaft of the motor vehicle transmission or vice versa. Inner disks can be connected to the inner disk carrier and outer disks to the outer disk carrier in a rotationally fixed but axially displaceable manner, the inner disks and outer disks being able to be arranged alternately. The inner disks are designed, in particular, as friction disks or steel disks having friction linings, while the outer disks are designed in particular as friction disks having steel disks or friction linings. With the help of an actuating element designed in particular as an actuating pot, a pressure plate, which can in particular be an axially supported steel lamella provided at the axial end and supported axially, can be used to close the multi-plate clutch on a counter-plate which is fixed in the axial direction and which is in particular a on the other axial end provided steel lamella can act to be pressed to the lamellae provided in between to be frictionally pressed. The multi-disc clutch is designed in particular as a wet multi-disc clutch in which the friction pairings of the multi-disc clutch can be cooled and / or lubricated with the aid of a cooling fluid, in particular cooling oil, in order to dissipate frictional heat and / or to minimize frictional wear.

In particular, the toothed body has a radially inwardly facing inner side, the toothed body in particular having a fastening shoulder protruding radially inward from the inner side, the toothed body resting with the inner side and / or with the fastening shoulder on the disk body. For example, the inner side of the toothed body can lie radially on the outside of the disk body over an area, optionally via an adhesive layer, with the fastening attachment preferably bearing axially against the disk body optionally via an adhesive layer. An overlap joint or a T-joint, which enables a stable welded connection by means of a butt weld or fillet weld, can easily be provided between the fastening attachment and the disk body. In particular, the attachment attachment of the toothed body is attached to the disk body from the radial outside, so that a gap is created between the rest of the toothed body and the disk body, through which a cooling oil can flow to cool the inner disk carrier.

The disc body preferably has a tube extension radially on the outside, with at least one first oil passage opening for the passage of cooling oil being provided in the pipe extension, the toothed body in particular having a second oil passage opening for the passage of cooling oil, radially spaced from the pipe extension and / or axially spaced from the first oil passage opening . To form the tube attachment, the disk body can be potted and / or cranked by a forming process. The tube attachment can be bent over in the axial direction from the radial plane of the disk body, so that the tube attachment can in particular directly adjoin the radial section of the disk body. The radial section of the disk body can be fastened, in particular welded, to a shaft or hub radially on the inside. It is also possible that a one-piece hub protrudes radially inward from the radial section of the disk body, which hub can be connected to the shaft in a rotationally fixed manner, in particular via an internal toothing of a plug-in toothing. Cooling oil, which was conveyed to the pipe socket in particular as a result of centrifugal forces, can reach the toothed body via the first oil passage opening. The second oil passage opening can, for example, when viewed in the radial direction, at least partially overlap the first oil passage opening, so that the cooling oil can reach the disks of the multi-disk clutch. Additionally or alternatively, the second oil passage opening can be positioned axially offset from the first oil passage opening, so that the cooling oil first has to flow to the second oil passage opening via a gap or groove formed between the toothed body and the pipe socket, whereby a cooling effect can already be achieved before the Cooling oil reaches the plates of the multi-plate clutch via the second oil passage opening. From there, the cooling oil can reach the outer disk carrier due to centrifugal force, which preferably also has at least one further oil passage opening, in particular so that the cooling oil can reach a further disk clutch provided radially outside of the disk clutch.

It is particularly preferred that a minimum radial gap distance s between a radially outwardly facing outer side of the disk body, in particular the pipe socket, and a radially inwardly facing inner side of the toothed body, in particular axially outside the fastening attachment, based on the average material thickness d of the toothed body 0 , 0 s / d 2.0, in particular 0.1 s / d 1.0, preferably 0.3 s / d 0.6. In comparison to a receiving pocket formed between the toothed body and the disk body of a one-piece inner disk carrier for receiving a forming tool, the ratio of the minimum radial gap distance s to the average material thickness d of the toothed body would be approximately s / d = 4, the radial installation space requirement can therefore be particularly small gap distance can be significantly reduced.

The invention also relates to a hybrid module for coupling an internal combustion engine and an electrical machine to a motor vehicle transmission, with a first friction clutch for coupling the internal combustion engine to a rotor of the electrical machine, a second friction clutch for coupling the rotor of the electrical machine to a first transmission input shaft and / or a third friction clutch for coupling the rotor of the electrical machine to a second transmission input shaft, wherein the first friction clutch and / or the second friction clutch and / or the third friction clutch is configured as a multi-disc clutch with an inner disc carrier, which can be designed and developed as described above . By designing the toothed body and the disk body of the inner disk carrier as separate components connected to one another, an otherwise remaining radial gap for receiving a forming tool can be avoided, so that a hybrid module with a small radial installation space requirement is possible.

• 1: eine schematische Schnittansicht eines Innenlamellenträgers,
• 2: eine schematische perspektivische Ansicht des Innenlamellenträgers aus 1 und
• 3: eine schematische Schnittansicht eines Teils eines Hybridmoduls.

In the following, the invention is explained by way of example with reference to the attached drawings using preferred exemplary embodiments, wherein the features shown below can represent an aspect of the invention both individually and in combination. Show it:

• 1 : a schematic sectional view of an inner disk carrier,
• 2 : A schematic perspective view of the inner disk carrier from 1 and
• 3 : a schematic sectional view of part of a hybrid module.

The in 1 and 2 shown inner disc carrier 10 has a disc body 12 on, the one substantially radially extending radial section 14th has, one of which is integral with the radial section 14th trained pipe socket bent over from the radial plane 16 protrudes in the axial direction. The inner disc carrier 10 additionally has a separate one from the disc body 12 designed tooth body 18th on the teeth produced by roll forming 20th for non-rotatable but axially displaceable mounting of inner plates 22nd having. The gear body 18th points in an area between the teeth 20th an inside facing radially inward 24 on, of which at one axial end of the gear body 18th a radially inwardly bent attachment attachment 26th protrudes. The attachment approach 26th is with a radially outward facing outer side 28 of the pipe socket 16 shit or otherwise attached. Between the inside 24 of the gear body 18th and the outside 28 of the disc body 12 is a crack 30th with a compared to the material thickness d of the gear body 18th small gap distance s educated. The pipe socket 16 of the disc body 12 has several with the gap 30th communicating first oil passage openings 32 on, via the centrifugal force-related cooling oil into the gap 30th and to the inside 24 of the gear body 18th can arrive. Axially spaced from the first oil passage openings 32 has the toothed body 18th , especially around the teeth 20th , at least one second oil passage opening 34 on, through which the cooling oil enters the interior with the help of the inner disc carrier 10 trained multi-disc clutch 36 can arrive.

As in 3 shown, can with the help of the inner disc carrier 10 trained multi-disc clutch 36 in a hybrid module 38 be installed. The hybrid module 38 can be used in a drive train of a hybrid motor vehicle in order to couple an internal combustion engine and an electrical machine to a motor vehicle transmission, in particular designed as a dual clutch transmission. For this purpose, a torque generated in the internal combustion engine can be fed into the hybrid module via a motor shaft configured in particular as a crankshaft of an internal combustion engine 38 be initiated. A torsional vibration damper can be attached to the motor shaft, which damper has, for example, a dual mass flywheel and a centrifugal force pendulum connected downstream in the torque flow on the secondary side. From the torsional vibration damper, the torque coming from the internal combustion engine can be introduced into a first friction clutch, also known as a “K0 clutch”. The first friction clutch is designed in particular as an oil-lubricated and cooled wet multi-plate clutch, which can be coupled to a rotatable housing. The rotatable housing is coupled, in particular via a gearwheel, to a rotor of the electrical machine, which is preferably arranged axially parallel, in particular via a spur gear toothing.

With the rotatable housing, an outer disk carrier 40 be rotatably coupled, the torque in a multi-plate clutch 42 can initiate. The outer disc carrier 40 has non-rotatable but axially displaceable outer plates designed as steel plates 44 on, which alternate with the inner disks designed as friction disks 22nd of the inner disc carrier 10 are arranged. When the multi-plate clutch is closed 42 can the torque from the outer disc carrier 40 to the inner plate carrier 10 be transmitted frictionally. The disc body 12 of the inner disc carrier 10 can radially inside with a hub 46 be connected, which can be rotatably coupled to a first transmission input shaft via a spline. In the illustrated embodiment, this can be caused by centrifugal force on the outer disk carrier 40 incoming cooling oil due to centrifugal force from radially inside to another inner disk carrier 48 another multi-plate clutch 50 reach the radial outside to the multi-plate clutch 42 nested is provided. The other multi-plate clutch 50 For example, it can be provided to couple the rotatable housing in a frictionally locking manner with a second transmission input shaft of the motor vehicle transmission configured as a dual clutch transmission, which is arranged coaxially with the first transmission input shaft.

List of reference symbols

10

Inner disc carrier

12

Disc body

14th

Radial section

16

Pipe socket

18th

Gear bodies

20th

tooth

22nd

Inner lamella

24

inside

26th

Fastening approach

28

Outside

30th

gap

32

first oil passage opening

34

second oil passage opening

36

Multi-disc clutch

38

Hybrid module

40

Outer disc carrier

42

Multi-disc clutch

44

Outer blades

46

hub

48

further inner plate carrier

50

Multi-disc clutch

d

thickness

s

Gap distance

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• DE 102014205570 A1 [0002]

Claims (4)

Inner disk carrier for a disk clutch (42), in particular in a hybrid module (38) provided for coupling an internal combustion engine and an electrical machine to a motor vehicle transmission a cranked and / or potted disc body (12) for encompassing built-in components and for fastening to a shaft, in particular a transmission input shaft of a motor vehicle transmission, and a toothed body (18), which is provided separately from the disk body (12) and protrudes on both axial sides over a substantially radially extending radial section (14) of the disk body (12), for the non-rotatable reception of lamellae (22) for frictional torque transmission, the toothed body (18) being fastened, in particular welded, to the disk body (12) radially on the outside. Inner disc carrier after Claim 1 characterized in that the toothed body (18) has an inner side (24) pointing radially inward, the toothed body (18) in particular having a fastening shoulder (26) protruding radially inward from the inner side (24), the toothed body (18) with the inner side (24) and / or with the fastening shoulder (26) on the disk body (12). Inner disc carrier after Claim 1 or 2 characterized in that the disc body (12) has a tube extension (16) radially on the outside, with at least one first oil passage opening (32) for the passage of cooling oil being provided in the tube extension (16), the toothed body (18) in particular being radially spaced from the Has a pipe socket (16) and / or axially spaced from the first oil passage opening (32) a second oil passage opening (34) for the passage of cooling oil. Inner disc carrier according to one of the Claims 1 to 3 characterized in that a minimum radial gap distance s between a radially outwardly facing outer side of the disk body (12), in particular of the pipe socket (16), and a radially inwardly facing inner side (24) of the toothed body (18), in particular axially outside the fastening attachment (26), based on the average material thickness d of the toothed body (18) 0.0 s / d 2.0, in particular 0.1 s / d 1.0, preferably 0.3 s / d 0 , 6 is.

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