WO2014012544A1

WO2014012544A1 - Coupling device and an outer plate carrier

Info

Publication number: WO2014012544A1
Application number: PCT/DE2013/200061
Authority: WO
Inventors: Peter Wahl; David SCHNÄDELBACH; Stephan Maienschein; Thorsten Krause
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2012-07-20
Filing date: 2013-07-17
Publication date: 2014-01-23
Also published as: CN104487723A; CN104487723B; DE112013003608A5; DE102013213989A1

Abstract

The invention relates to a coupling device, particularly for arranging in a drive train of a motor vehicle between a drive unit and a gearbox for transmitting torques. Said coupling device comprises at least one outer plate carrier and one inner plate carrier, said outer plate carrier comprising at least one opening, on a peripheral surface that has a toothing, for the purpose of conducting a hydraulic liquid in a radial direction. At least one guide element is provided which is suitable for deflecting, in an axial direction, the hydraulic liquid which flows in the radial direction outwards through the at least one opening. The invention also relates to an outer plate carrier. The coupling device shown here allows a hydraulic liquid to be conveyed towards specific components of the coupling device in a targeted manner.

Description

Coupling device and outer disk carrier

The invention relates to a (wet-running) coupling device, in particular for the arrangement in a drive train of a motor vehicle between a drive unit and a transmission for transmitting torques, as well as an outer disk carrier.

The coupling device can be used in particular as a double clutch. The present invention is particularly directed to so-called wet-running friction clutches, e.g. in the form of a multi-plate clutch, which are operated under the action of a viscous operating medium, such as a hydraulic fluid (eg., Oil). The slats of the coupling device are cooled by the hydraulic fluid. In the coupling device, in addition to the slats, other components are arranged, in particular spring damper units, which also have a performance that depends on the adequate supply of hydraulic fluid. In the operation of such a wet-running coupling device, it can often occur that it can lead to a lower, but also to an over-supply of hydraulic fluid to individual components of the coupling device. As a result, the functions of the individual components of the coupling device can be impaired.

On this basis, the present invention has the object, at least partially overcome the known from the prior art disadvantages. In particular, a coupling device is to be proposed by which an over- or undersupply of components of the coupling device with hydraulic fluid during operation of the coupling device is avoided. The object is solved by the features of independent claim 1 and by the features of the directed to an outer disc carrier claim 9. Advantageous developments are the subject of the dependent claims.

The invention relates to a coupling device, in particular for the arrangement in a drive train of a motor vehicle between a drive unit and a transmission for transmitting torques, wherein the coupling device has at least one outer disk carrier and an inner disk carrier. The outer disk carrier has on a peripheral surface having a toothing at least one opening for the passage of a hydraulic fluid in a radial direction. It is at least one guiding element is provided on an outer side of the peripheral surface, which is suitable for deflecting the, in the radial direction outwardly through the at least one opening flowing hydraulic fluid in an axial direction.

The outer disk carrier and the inner disk carrier are in particular part of a friction clutch arrangement, in which the disks are flowed around in the operation of the clutch assembly of a hydraulic fluid. The hydraulic fluid transfers during the closing of the coupling device, so in the succession-to-moving outer plates and inner plates, due to their viscosity successively a torque. When the clutch device is closed, torque is transmitted from the inner disks to the outer disks or vice versa. The outer disk carrier serves as a driver for the outer disk and in the same way the inner disk carrier as a driver for the inner disk. In particular, the outer disk carrier as a driving device for the outer disk on a toothing on a particular circumferential peripheral surface. This toothing ensures a positive connection of outer disk carrier and outer disk in a circumferential direction, so that, during operation of the clutch device, the outer disk carrier and the outer disk execute a rectified rotational movement. In particular, the peripheral surface extends over the full circumference of the disk-shaped outer disk arrangement, so that this peripheral surface having a toothing forms a cylindrical peripheral surface.

It is known that this peripheral surface of the outer disk carrier having a toothing has openings for passing a hydraulic fluid in a radial direction. This ensures that the heated as a result of the friction between the outer disk and inner disk hydraulic fluid can flow, so that overheating of the coupling device during operation is avoided.

It is proposed here that at least one guide element is provided which is suitable for deflecting the hydraulic fluid flowing outward in the radial direction through the at least one opening in an axial direction. In particular, the at least one guide element thus has the effect that the hydraulic fluid flowing through the at least one opening is no longer deflected exclusively in the radial direction and / or in the circumferential direction, but additionally in the axial direction. By providing at least one guide element, a directed flow of the hydraulic fluid is thus effected so that components of the coupling device arranged radially outside the outer disk carrier can be specifically supplied with hydraulic fluid or can be supplied with hydraulic fluid. aims to over-pressurization of components with the hydraulic fluid can be prevented.

According to an advantageous development, the at least one guide element is positively connected to the outer disk carrier. In a positive connection, one of the connection partners is in the way of another. In particular, such a positive connection between the at least one guide element and the outer disk carrier can be generated via third elements, for. B. by pins, rivets, screws or the like.

According to another advantageous development, the at least one guide element is materially connected to the outer disk carrier. As cohesive compounds compounds are referred to, in which the connection partners are held together by atomic or molecular forces. At the same time, they are non-releasable compounds that can only be separated by destroying the connecting means.

In particular, the at least one guide element is formed by forming the outer disk carrier. In particular, this forming processes, such. Deep drawing, bending processes or the like, meaning optionally combined with punching or cutting processes. In the forming process, the guide element is produced in particular from the material of the outer plate carrier by deformation of the outer plate carrier.

A cohesive connection can also be produced by welding, soldering or gluing.

According to a particularly advantageous development, the at least one opening is produced by the deformation of the outer disk carrier and as a result of the formation of the at least one guide element. This applies in particular to combined punching and bending processes.

In particular, in each case one guide element is assigned in each case to an opening. In particular, this means that the hydraulic fluid, which flows through the at least one opening radially outward, is deflected by a respective guide element in an axial direction.

In particular, the at least one guide element extends in a circumferential direction over a plurality of openings. According to an advantageous development, the guide element is designed to be closed in the circumferential direction. In particular, the guide element extends completely around the outer disk carrier, thus forming a closed circular shape.

In particular, the at least one guide element extends outwardly from the outside of the circumferential surface of the outer disk carrier in the radial direction and in the axial direction so that the opening assigned to the guide element is at least partially covered.

The guide element is arranged in particular on an outer side of the peripheral surface. In particular, it is meant that the guide element fulfills the function of the deflection of the hydraulic fluid in the radial direction seen outside of the opening. The type of connection of the guide element on the outer disk carrier or other components is independent of this function to be fulfilled freely selectable. However, the arrangement of the guide element on the outer disk carrier is particularly advantageous, since thus openings and guide elements can be arranged exactly to each other.

The present invention is further directed to an outer disk carrier for a coupling device according to the invention. The outer disk carrier has on a peripheral surface having a toothing at least one opening for the passage of a hydraulic fluid in a radial direction. As viewed in the radial direction, the outer disk carrier has on the outside of the peripheral surface at least one guide element which is suitable for deflecting the hydraulic fluid flowing in the radial direction outwards through the at least one opening in an axial direction

In particular, the proposed outer disk carrier can be installed with at least one guide element without further adaptation measures in existing coupling devices, so that an optimization of existing coupling devices can be achieved in a simple manner.

It is further proposed a motor vehicle that has at least one drive unit and a transmission and an interposed coupling device according to the invention.

The statements made in relation to the coupling device apply in particular to the outer disk carrier according to the invention and vice versa. In addition, are the features listed individually in the claims in any technologically meaningful way combined and can be supplemented by explanatory facts from the description, with further embodiments of the invention are shown.

The invention and the technical environment will be explained in more detail with reference to FIGS. The figures show particularly preferred embodiments, to which the invention is not limited. In particular, it should be noted that the figures and in particular the illustrated proportions are only schematic. Like reference numerals in the figures indicate the same items. Show it

1 shows a motor vehicle with a coupling device;

2 shows a coupling device in a side view in section;

3 shows a perspective view of the coupling device according to FIG. 2;

4 shows an outer disk carrier, which is used in a coupling device according to FIG. 2;

5 shows a detail of the outer disk carrier of FIG. 4;

6 shows a special embodiment variant of an outer disk carrier in a coupling device in a side view in section;

FIG. 7 is a perspective view of a detail of an outer disc carrier of FIG. 6; FIG.

FIG. 8 shows a further perspective view of the outer disk carrier according to FIG. 7; FIG.

9 shows a further coupling device in a side view in section;

FIG. 10 shows the coupling device according to FIG. 9 in a perspective view; FIG.

Fig. 1 1: a further embodiment of a coupling device in a side view in section and FIG. 12: a perspective view of the coupling device according to FIG.

1 shows schematically a motor vehicle 3 with a coupling device 1. The clutch device 1 is used to transmit torques between a drive unit 4 and a gearbox 5. The clutch device 1 has an outer disk carrier 6 with outer disks 16 and an inner disk carrier 17 with inner disks 7, which are frictionally connected to each other by a plate spring 19 and a disengaging device 18 can be solved from each other. The disengaging device 18 is actuated by a clutch pedal 20. Starting from the drive unit 4, torques are transmitted via the clutch device 1 to a transmission 5 and from there to a drive train 2.

Fig. 2 shows a coupling device 1 in a side view in section. The coupling device 1 has an outer disk carrier 6 and an inner disk carrier 7. The outer disk carrier 6 is positively coupled in a circumferential direction 15 with outer disks 16, the inner disk carrier 7 with inner disks 17. This positive connection, z. B. between the outer disk carrier 6 and outer disk 16 is generated via a toothing 8 on the circumferential surface 9 of the outer disk carrier 6. The circumferential surface 9 extends in the circumferential direction 15 and in the axial direction 14. The peripheral surface 9 encloses the arrangement of outer plates 16 in the axial direction 14. A hydraulic fluid 1 1 within the coupling device 1 flows during operation of the coupling device 1 in the radial direction 12 from the inside via the inner disk carrier 7 between the inner disk 17 and outer disk 16 through openings 10 in the outer disk carrier 6 to the outside. By the hydraulic fluid 1 1, a torque is already transmitted during the successive closing of the clutch before the outer disks 16 and inner disks 17 are frictionally connected to each other. Due to the friction occurring during the closing process, the hydraulic fluid 1 1 is heated.

The coupling device 1 has at the outer disk carrier 6 in the region of the openings 10 guide elements 13 through which the hydraulic fluid 1 1 is deflected in the axial direction 14. The guide elements 13 extend from the outside 24 of the peripheral surface 9 radially outward and in the axial direction 14 so that the openings 10 are at least partially covered. The hydraulic fluid 1 1 now flows not only in the radial direction 12 and / or in the circumferential direction 15, but in addition in the axial direction 14. By the deflection of the hydraulic fluid 1 1 due to the arrangement of the guide element 13 can be a directed flow of the hydraulic liquid 1 1 are generated, so that radially outside of the outer disk carrier 6 arranged components of the coupling device 1 are selectively supplied with hydraulic fluid 1 1 or excessive loading of components by the liquid 1 1 can be prevented accordingly.

FIG. 3 shows a perspective view of the coupling device 1 according to FIG. 2. The outer disk carrier 6 has a peripheral surface 9 running in the circumferential direction 15 and in the axial direction 14, on which openings 10 are arranged. The peripheral surface 9 has a toothing 8, so that a positive connection in the circumferential direction 15 between the outer disk 16 and outer disk carrier 6 is present. Vanes 13 are each associated with an aperture 10 and are hereby replaced by e.g. a punching and bending process made of the material of the outer disk carrier 6 as a result of a forming process.

Fig. 4 shows an outer disk carrier 6 in a perspective view, which is used in the coupling device 1 according to FIG. The outer disk carrier 6 has a cylindrical peripheral surface 9, which has a toothing 8 for forming a positive connection in the circumferential direction 15 between outer disk 16 and outer disk carrier 6. On the peripheral surface 9 openings 10 are arranged and at each opening 10 guide elements 13 which extend from the outside 24 of the peripheral surface 9 radially outwardly and in the axial direction 14. A hydraulic fluid 1 1 can flow through the openings 10 in the radial direction 12 from the inside to the outside during operation of the coupling device 1. The hydraulic fluid 1 1 is deflected after flowing through the openings 10 in the radial direction 12 from the inside to the outside by the guide elements 13 in the axial direction 14, respectively.

FIG. 5 shows the outer disk carrier 6 according to FIG. 4 in a perspective view in detail. It can be seen that the openings 10 are arranged with guide elements 13 on the respective elevations 25 of the toothing 8 on the peripheral surface 9 of the outer disk carrier 6. The guide elements 13 are formed here as a tab 21, which are connected only on one side 26 of the opening 10 with the outer disk carrier 6 and on the three other sides 26 of the opening 10 no connection to the outer disk carrier 6.

Fig. 6 shows a further embodiment of a coupling device 1 in section in a side view. Recognizable are inner disk 17 and outer disk 16. The outer disk 16 are coupled in a circumferential direction 15 by positive engagement with the toothing 8 on a circumferential surface 9 of the outer disk carrier 6. A hydraulic fluid 1 1 through- occurs in the operation of the coupling device 1, the openings 10 in the outer disk carrier 6 in the radial direction 12 from the inside out. The guide elements 13 are formed here as pockets 22 which are connected to three sides 26 of the opening 10 on the outer disk carrier 6 and have only on one side 26 no contact with the outer disk carrier 6. Also, by the pockets 22, the hydraulic fluid 1 1 is deflected after passing through the openings 10 in the radial direction 12 from the inside to the outside in the axial direction 14.

Fig. 7 shows an outer disk carrier 6, as can be seen in the coupling device 1 according to FIG. 6, in the perspective view. The outer disk carrier 6 has along the peripheral surface 9 a toothing 8, wherein each of the elevations 25 of the toothing 8 guide elements 13 are formed in the form of pockets 22. The guide elements 13 are connected cohesively on three sides of the opening 10 with the outer disk carrier 6. Only in an axial direction 14 does the bag-shaped guide element 13 have an opening 10. By such a design of the guide elements 13, the flow of the hydraulic fluid 1 1 can be directed even more.

Fig. 8 shows the outer disk carrier 6 according to FIG. 7 also in a perspective view. Again, the pocket-shaped design of the guide elements 13 can be seen. On three sides 26 of the opening 10, the guide element 13 is connected to the outer disk carrier 6, so that the opening 10 has only in the axial direction 14.

FIG. 9 shows a further embodiment variant of a coupling device 1, wherein spring dampers 23 are arranged outside the outer disk carrier 6 in the radial direction 12 as further components of the coupling device 1. The coupling device 1 shown in section here in a side view has an inner disk carrier 7 with inner disks 17 and an outer disk carrier 6 with outer disks 6. The outer disk carrier 6 has openings 10 and guide elements 13. By the guide elements 13, a hydraulic fluid 1 1 is deflected in the axial direction 14 toward the spring damper 23. Thus, a targeted admission z. B. the spring damper 23 is guaranteed as a further component of the coupling device 1.

FIG. 10 shows the coupling device 1 according to FIG. 9 in a perspective view. Evident are the spring damper 23, guide elements 13 and outer plate carrier. 6 Fig. 1 1 shows a further embodiment of a coupling device 1 in a side view in section. The coupling device 1 has an inner disk carrier 7 with inner disks 17 and an outer disk carrier 6 with outer disks 16. On the outer disk carrier 6 9 openings 10 are provided on a peripheral surface through which the hydraulic fluid 1 1 in the radial direction 12 can flow from the inside out. The outer disk carrier 6 has no materially connected to him guide elements 13. Here guide elements 13 are positively connected by connecting elements 27 with the outer disk carrier 6. The guide element 13 extends immediately adjacent to the openings 10 and, starting from the outer side 24 of the peripheral surface 9 in the radial direction 12 to the outside, so that a deflection of the hydraulic fluid 1 1 in the axial direction 14 is ensured by the guide element 13. The positive connection of the guide element 13 to the outer disk carrier 6 can here, for example, as shown, by pins, but also by screws, rivets or cohesively by welding, soldering or gluing.

FIG. 12 shows the coupling device 1 according to FIG. 1 in a perspective view in section. The guide element 13 extends here over a plurality of openings 10 away in a Umfangsnchtung 15. It is indicated here that the guide element 13 in Umfangsnchtung 15 closed around the outer disk carrier 6 extends around. The guide element 13 may also be designed to be split in the circumferential direction 15, so that only individual openings 10 are covered by the guide element 13. In particular, however, further guide elements 13 are then provided, so that all openings 10 are then covered by a plurality of juxtaposed guide elements 13 as viewed in the circumferential direction 15. The guide elements 13, which are thus frictionally or materially connected to the outer disk carrier 6, effect a deflection of the hydraulic fluid 11 into the axial direction 14.

The particular advantage of the embodiment of the guide elements 13 according to FIG. 1 1 and 12 is the subsequently possible arrangement of the guide elements 13 to already designed coupling devices 1. Accordingly, such guide elements 13 can also be retrofitted or arranged in a simple manner to the outer plate carrier 6 become.

The thus separately possible production of the guide elements 13 has, inter alia, the advantage that a targeted selection of materials can be made and beyond a largely free design of the guide element 13 is possible. A disadvantage compared with the embodiments of the outer disk carrier shown in FIGS. 2 to 10 is that here connecting elements or connection technology and a plurality of individual parts (at least one guide element 13 and an outer plate carrier 6) are required to effect the same function.

List of Reference Coupling device

powertrain

motor vehicle

drive unit

transmission

External disk carrier

Inner disk carrier

gearing

peripheral surface

opening

liquid

Radial direction

vane

Axial direction

circumferentially

outer plate

inner plate

declutching

Belleville spring

clutch pedal

flap

bag

spring shock absorber

outside

survey page

connecting element

Claims

P121465-10 WO 2014/012544 PCT/DE2013/200061 - 13 - Patent claims

Clutch device (1), particularly for arrangement in a drive train

(2) a motor vehicle

(3) between a drive unit

(4) and a gearbox

(5) for transmitting torque, wherein the clutch device (1) has at least one outer disk carrier

(6) and an inner disk carrier

(7), wherein the outer disk carrier (6) has teeth on one side

(8) having peripheral surface (9) has at least one opening (10) for the passage of a hydraulic fluid (1 1) in a radial direction (12), with at least one guide element (13) on an outside (24) of the peripheral surface (9) It is provided that the hydraulic fluid (1 1 ) flowing outwards in the radial direction (12) through the at least one opening (9) is suitable for an axial direction (14).

Clutch device (1) according to claim 1, wherein the at least one guide element (13) is positively connected to the outer disk carrier (6).

Clutch device (1) according to claim 1, wherein the at least one guide element (13) is cohesively connected to the outer disk carrier (6).

Clutch device (1) according to claim 3, wherein the at least one guide element (13) is formed by forming the outer disk carrier (6).

Clutch device (1) according to claim 4, wherein the at least one opening (10) is created by the deformation of the outer disk carrier (6) and as a result of the formation of the at least one guide element (13).

Coupling device (1) according to one of the preceding claims, wherein a guide element (13) is assigned to an opening (10).

Coupling device (1) according to one of claims 1 to 5, wherein the at least one guide element (13) extends in a circumferential direction (15) over a plurality of openings (10).

Coupling device (1) according to claim 7, wherein the guide element (13) is designed to be closed in the circumferential direction (14). P121465-10

WO 2014/012544 PCT/DE2013/200061

- 14 -

9. Outer disk carrier (6) for a clutch device (1) according to one of the preceding claims, wherein the outer disk carrier (6) has at least one opening (10) on a peripheral surface (9) having teeth (8) for the passage of a hydraulic fluid (1 1) in a radial direction (12), with at least one guide element (13) being provided on an outer side (24) of the circumferential surface (9) so that the in the radial direction (12) can be deflected outwards through the at least one opening ( 9) flowing hydraulic fluid (1 1) in an axial direction (14) is suitable.

10. Motor vehicle (3) comprising at least a drive unit (4) and a transmission (5) and a clutch device (1) arranged therebetween according to one of claims 1 to 8.