CN110573758B

CN110573758B - Clutch device

Info

Publication number: CN110573758B
Application number: CN201880028520.XA
Authority: CN
Inventors: D·霍夫施泰特尔
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2017-05-02
Filing date: 2018-04-05
Publication date: 2021-07-13
Anticipated expiration: 2038-04-05
Also published as: CN110573758A; KR102561060B1; KR20200002865A; WO2018202236A1; DE102017109323A1; DE112018002275A5

Abstract

The clutch device comprises a first partial clutch (2) having a first outer disk carrier (4) with a first outer disk (5) and a radially inner second partial clutch (3) having a second outer disk carrier (14) with a second outer disk (15), which second outer disk carrier (14) is connected to the first outer disk carrier (4) by means of radially extending connecting webs (13), each partial clutch (2, 3) having a pressure pot (10, 19) for deactivating the partial clutch (2, 3), which pressure pot can be moved axially against a spring element (11, 20), which spring element (11, 20) is axially supported on a support means, which second outer disk carrier (14) is embodied in one piece with the connecting webs (13), which support means is embodied in the form of a one-piece bearing ring (24) having at least one shaft for bearing against the outer disk carrier (14) and the connecting webs (13) At least one radial contact section (25, 27) and two support sections (33, 34) for the spring elements (11, 20).

Description

Clutch device

Technical Field

The invention relates to a clutch device comprising a first partial clutch having a first outer disk carrier with a first outer disk and a radially inner second partial clutch having a second outer disk carrier with a second outer disk, wherein the second outer disk carrier is connected to the first outer disk carrier via radially extending connecting webs, wherein each partial clutch has a pressure pot for actuating the partial clutch, which pressure pot can be moved in the axial direction against a spring element, wherein the spring element is supported in the axial direction on a support means.

Background

Such a clutch device comprising two partial clutches is often also referred to as a dual clutch. The two partial clutches are arranged radially one inside the other, the first partial clutch which is radially outer is generally designated as K1, and the second partial clutch which is radially inner is designated as K2. Each partial clutch has an outer plate carrier with corresponding outer plates and an inner plate carrier with inner plates, wherein the corresponding outer plates and inner plates form a plate package which can be pressed and placed in a friction-locking connection by means of an actuating element in the form of a pressure pot associated with the corresponding partial clutch, thereby closing the corresponding partial clutch. The disks are separated again by unloading of the pressure tank, for which purpose a spring element is provided against which the pressure tank can be moved in the axial direction, which spring element is therefore tensioned when the disk stack is pressed. If the pressure tank is unloaded, the spring element presses the pressure tank into the initial position again, whereby the pressed sheets are unloaded and separated again from one another, i.e. "ventilated".

The two outer disk carriers are coupled by means of a common drive element, for example, the output shaft of a motor, wherein, in the clutch arrangement mentioned, for example, a first radially outer disk carrier is coupled directly to the drive element, while a second radially inner disk carrier is coupled via a connecting web to the first outer disk carrier and thus indirectly via said first outer disk carrier to the common drive element. In contrast, two inner disk carriers are located at the output, for example on the respective transmission output shaft or transmission output hub, the inner disk carrier of the first partial clutch being coupled to the first driven part and the inner disk carrier of the second partial clutch being coupled to the second driven part. Depending on which partial clutch is engaged by pressing the respective plate set, either one of the output parts or the other output part is engaged in the torque-transmitting connection of the drive part. The structure and function of such clutch devices are sufficiently known.

In known clutch arrangements, the connecting webs are separate annular members. The component is arranged on the one hand on a first, radially outer sheet metal carrier, and on the other hand, a second, radially inner sheet metal carrier is also connected to a separate connecting web. The torque to be transmitted is transmitted via this connecting web from the outer plate carrier to the inner plate carrier, which rotate at the same speed. Furthermore, the axial clamping force of the second partial clutch which is arranged inside is also transmitted via the connecting web. In order to transmit the clamping force, an additional securing ring is required, which is arranged on the second outer disk carrier and which fixes or supports the connecting web in the axial direction.

Furthermore, the connecting web also serves as or is part of a support means on which the corresponding spring element of the partial clutch is supported. The spring element of the second partial clutch is therefore supported on the one hand on the second inner disk carrier and on the other hand on the inner edge region of the connecting web. The spring element is therefore supported directly on the connection lug. In contrast, an additional spring support ring is provided for supporting the spring element of the first partial clutch (which is also supported on the pressure tank of the first partial clutch on the one hand), said spring support ring being supported axially on the connection lug.

Furthermore, the support ring and the securing ring also contribute to the securing function of the pressure tank of the second partial clutch in the transport situation. The pressure tank usually has a transport securing device which, prior to the final assembly in the transmission, bears axially against a bearing ring or a securing ring during the actuation of the clutch device.

It is thus necessary to use a series of separate structural elements, namely, in addition to the first outer sheet metal carrier, a second outer sheet metal carrier, a separate annular connecting web, and a securing ring and a supporting ring. This results in: a large number of individual components are maintained and also assembled, which is complicated and complicated in terms of construction and also in terms of manufacturing technology. Furthermore, since the above-described elements are rotationally symmetrical components and rotate about a common axis of rotation, it is likewise disadvantageous to mount a plurality of elements which may have an imbalance or have a coaxial orientation tolerance.

Disclosure of Invention

The problem underlying the invention is therefore: a clutch device is proposed which is improved in contrast thereto.

In order to solve this problem, according to the invention, in a clutch device of the type mentioned at the beginning: the second outer plate carrier is designed in one piece with the connecting web, and the support means in the form of a one-piece support ring is designed with at least one axial contact section and/or at least one radial contact section for contacting the outer plate carrier and the connecting web, and with two support sections for the spring element.

According to the invention, in the new clutch device, instead of four separate components (second outer plate carrier, connecting webs, securing ring, bearing ring), only two components are used. On the one hand, the second outer plate carrier and the connecting web are embodied as a one-piece component, i.e., the outer plate carrier merges integrally into the connecting web. Thus, only one component needs to be handled and assembled here. Since the connecting web is connected in one piece with the outer sheet carrier, no separate securing ring is required.

Furthermore, to form the support means, a one-piece component in the form of a support ring is also used, which likewise combines a plurality of functions. On the one hand, at least one axial contact section and/or at least one radial contact section is formed on the support ring, by means of which the support ring can be supported on the connection lug in the axial direction on the one hand and/or can be supported or centered on the inner periphery of the second outer plate carrier in the radial direction on the other hand. It is possible to provide only one axial support section, only one radial support section or both axial and radial support sections. A simple and accurate positioning of the one-piece bearing ring can thus be achieved. Furthermore, two separate support sections are realized on the bearing ring, the first support section being used for the spring elements of the first external partial clutch and the second support section being used for the spring elements of the second internal partial clutch. It is thus also possible here to support two spring elements on only one component.

It can be seen that fewer components are sufficient and the assembly is simplified in particular, since instead of four components, two components are now provided. In addition, greater axial rigidity of the assembly can be achieved, and possible imbalances can be reduced because fewer components are provided. An optimized installation space requirement can thereby also be achieved.

The outer plate carrier and the connecting ring are preferably formed by a modified sheet metal component, which enables a very simple production. The support ring can likewise consist of a modified sheet metal component.

In order to form a plurality of axial bearing segments, a plurality of radially projecting support tongues are preferably provided on the one-piece support ring, by means of which the support ring bears or is supported on the connection lugs. Such a support tongue can be formed or stamped in a simple manner during the production of the support ring, for example by modifying a sheet metal component.

The radial bearing section is preferably embodied in the form of an annularly encircling, axially extending flange which engages into the inner circumference of the second outer plate carrier and is radially centered by means of said flange.

In order to couple the pressure tank of the second partial clutch, which is attached on the drive side and thus rotates permanently together with the two outer plate carriers, to the second outer plate carrier, according to the invention a first recess can be formed on the radially inwardly extending annular flange of the bearing ring, through which first recess the axially extending projection of the pressure tank of the second partial clutch passes. Such a through projection acts on a corresponding outer plate or an additional support plate on the outer plate carrier in order to press the plate pack.

Finally, a second recess, which is formed from a plurality of recesses distributed around the circumference and behind which the locking section formed on the pressure tank locks, can be provided on the annular flange. By means of this snap-on connection, the transport safety of the pressure tank is ensured during the operation of the clutch before the final assembly in the transmission. In the pressure tank, a plurality of latching sections are provided corresponding to the number of the second recesses, which latching sections latch onto the annular flange of the one-piece bearing ring or behind the bearing ring through the second recesses, so that the pressure tank is coupled axially fixedly to the bearing ring.

In addition to the clutch device itself, the invention also relates to an outer plate carrier assembly for a radially inwardly arranged partial clutch of a clutch device of the aforementioned type. The outer plate carrier assembly according to the invention comprises an outer plate carrier with radially outwardly extending connecting webs integrally molded thereon, and a one-piece support ring with at least one axial contact section and/or at least one radial contact section for contacting the connecting webs and the outer plate carrier, and two support sections with spring elements for the two partial clutches.

The outer plate carrier and the connecting webs and/or the bearing rings are preferably produced from modified sheet metal components, which enables simple production.

Furthermore, a plurality of axial abutment sections in the form of a plurality of radially projecting support tongues can be provided. The radial bearing section can furthermore be embodied in the form of an annularly circumferential, axially extending flange.

In order to couple the pressure pot of the second, inner partial clutch with the bearing ring and thus with the second outer disk carrier, a first recess is preferably formed on the radially inwardly extending annular flange of the bearing ring, through which the axially extending projection of the pressure pot of the second partial clutch passes.

For the purpose of achieving transport safety, a plurality of second recesses arranged distributed around the circumference can finally be provided on the annular flange, behind which latching sections formed on the pressure tank latch.

Drawings

The invention is explained below with reference to embodiments and with reference to the drawings. The figures are schematic diagrams and show:

figure 1 is a schematic view of a clutch device according to the prior art,

figure 2 is a schematic representation of the outer plate carrier assembly of the built-in second sub-clutch of the clutch device of figure 1,

figure 3 is a schematic representation of an outer plate carrier assembly according to the invention for a built-in second partial clutch of a double clutch device,

figure 4 includes the clutch device according to the invention of the outer plate carrier assembly of figure 3,

FIG. 5 is a perspective view of the one-piece support ring of the outer plate bracket assembly of FIG. 3,

FIG. 6 is a schematic representation of a cross section of the second partial clutch region of the associated pressure tank with a first cross section, an

Fig. 7 is a diagram corresponding to fig. 6 in a second section.

Detailed Description

Fig. 1 shows a hitherto known clutch device 1 as prior art, having a first partial clutch 2 arranged radially on the outside and a second partial clutch 3 arranged radially on the inside. The first partial clutch 2 comprises a first outer plate carrier 4 with an outer plate 5, typically a steel plate, arranged thereon. The outer plate carrier 4 is arranged on a drive element 6, for example a motor driven shaft, and is driven in a rotating manner by this drive element.

The partial clutch 2 further comprises an inner plate carrier 7 with an inner plate 8, which is designed, for example, as a friction plate with double-sided friction linings. The inner plate carrier 7 is arranged on a first driven part 9, for example a transmission input shaft or a transmission input hub.

Furthermore, the first partial clutch comprises an actuating element in the form of a pressure tank 10, which can be moved in the axial direction by means of an adjusting device, not shown in detail. The pressure tank serves to press the sheet pack formed by the outer and

inner sheets

5, 8 in the axial direction in order to produce a frictional connection, so that the torque introduced by the drive part 6 is transmitted via the outer sheet carrier 4 and the sheet pack in frictional connection to the inner sheet carrier 8 and via the inner sheet carrier to the output part 9.

The pressure tank 10 is movable in the axial direction against a spring element 11, for example a disk spring. The spring element 11 is supported on the one hand on the pressure tank 10 and on the other hand on a bearing ring 12, which is supported in the axial direction on the connecting webs 13.

The second partial clutch 3 comprises a second outer plate carrier 14 with an outer plate 15, which is also a steel plate, for example. The outer plate carrier 14 is coupled to the first outer plate carrier 4 via the connecting web 13, i.e. the rotation of the outer plate carrier 4 produced by the drive element 6 is automatically transmitted to the second outer plate carrier 14 rotating at the same rotational speed. The connecting web 13 is a separate component and is attached by its upper end region to the outer sheet holder 4, said second outer sheet holder 14 passing through a corresponding through hole in the connecting web 13, whereby a torque-transmitting connection between the two elements is obtained.

The second partial clutch 3 furthermore comprises an inner plate carrier 16 with an inner plate 17, which in turn is in the form of a friction plate with friction linings on both sides, for example. The inner plate carrier 16 is attached to a second driven member 18, which in turn is a transmission input shaft or a transmission output hub, for example.

Furthermore, the second partial clutch train comprises a pressure tank 19, which is also similar to pressure tank 10 and is supported on the surrounding structure by means of a rolling bearing, not shown in detail. The pressure tank 19 serves to press the disk pack formed by the

disks

15, 17 in the axial direction in order to close the partial clutch 3. In this case, the torque of the drive part 6 is transmitted via the outer plate 4 and the connecting web 13 and the friction-locking, pressed-on plate pack to the inner plate carrier 16 and via said inner plate carrier to the driven part 8.

The pressure tank 19 can be moved in the axial direction against a spring element 20 (here, for example, also a disk spring). The spring element 20 is supported on the one hand on the pressure pot 19 and on the other hand on a support means, here the inner edge region of the connecting web 13.

As already explained, the

pressure vessels

10 and 19 rotate permanently together with the first and second

outer disk carriers

4, 14, which also rotate permanently, for which purpose the first pressure vessel 10 passes through the connecting web 13 in the corresponding through-opening, while the second pressure vessel 19 also passes through the connecting web in the corresponding through-opening or recess. This ultimately results in a rotation between the

pressure vessels

10, 19 and the drive element 6.

Since the axial clamping force of the second partial clutch 3 is also transmitted via the connecting web 13, an axial securing ring 21 is provided, by means of which the connecting web 13 is fixed in the axial direction. The connecting web 13 is supported on this securing ring 21. As shown in fig. 1, a support ring 12 is arranged below the securing ring 21, which support ring is supported in that respect in the axial direction on the connecting webs 13.

As shown by the dashed lines, a latching section 22 is finally formed on the pressure pot 19, in which a corresponding latching recess formed on the connecting web 13 is engaged and behind said latching section, as a result of which the transport safety of the pressure pot 19 is achieved on the connecting web 13, which is required for the actuation of the clutch device in the case of assembly in a transmission.

It can therefore be seen that for the transmission of torque from the first outer plate carrier 4 to the second outer plate carrier 14, for the realization of the respective support section and for the axial securing of the connection webs, a series of individual components are provided, namely the second outer plate carrier 14, the connection webs 13, the support ring 12 and the securing ring 11.

Fig. 2 shows these components or the outer plate carrier assembly 23 formed therefrom in a detailed schematic representation. Shown are the outer plate carrier 14 and the individual connecting webs 13, the securing ring 21 and the support ring 12 on which the spring element 11 of the first partial clutch is supported. This configuration is complicated because it is multi-piece.

In contrast, the invention provides an outer plate carrier assembly of significantly simpler design, which is shown in the schematic representation in fig. 3 and which can be integrated in the clutch device according to the invention, as shown in fig. 4. In the following, the same reference numerals are used with respect to fig. 1 and 2 for the same components.

Fig. 3 shows an outer sheet bracket assembly 23 according to the invention, comprising an outer sheet bracket 14 on which the connecting tabs 13 are molded in one piece in this inventive configuration. The outer sheet support 14 and the connecting web 13 thus form a common component, which is preferably formed from sheet metal components by appropriate stamping and forming.

The outer plate carrier assembly 23 according to the invention furthermore comprises a one-piece bearing ring 24, on which a plurality of axial bearing segments 25 in the form of radially projecting tongues 26 (see fig. 5) are formed, by means of which the bearing ring 24 bears axially against the connecting webs 13. Furthermore, the one-piece bearing ring 24 comprises a radial bearing section 27 in the form of an annularly circumferential flange 28 (see fig. 5) which extends in the axial direction and which engages into the inner periphery of the inner plate carrier 14 and bears against it in a centered manner on the bearing ring 24. The

support sections

25, 27 provide a rotationally fixed connection between the support ring 24 and the one-piece component comprising the outer plate carrier 14 and the connecting web 13. It can be assumed that: only one or more axial support sections 25 or only radial support sections 27 are also provided.

Furthermore, with reference to fig. 5, a radially inwardly extending annular flange 29 is provided on the bearing ring 24, on which a plurality of first recesses 30 are formed, through which the pressure tank 19 passes with corresponding axially oriented projections 31 in the assembled position (see fig. 6).

As a result, a rotationally fixed connection is achieved in the pressure tank 19 and in the bearing ring 24 and thus also in the outer disk carrier 14, and (because the connecting web 13 is coupled to the outer disk carrier 4) also with this outer disk carrier and thus with the drive element 6.

Furthermore, a second recess 35 is formed on the annular flange 29, through which the bent latching section 32 of the pressure tank 19 passes, see fig. 7. This snap-lock connection serves as a transport safety means by which the pressure tank 19 is fastened to the bearing ring 24.

Furthermore, the one-piece bearing ring 24 according to the invention has two

support sections

33 and 34 on which the

spring elements

11 and 20 can be supported. In the assembled position, the spring element 11 is supported on the axially extending bearing section 33, while the spring element 20 is supported on the substantially radially extending bearing section 34.

Fig. 4 shows a view of a clutch device 1 according to the invention, which essentially corresponds in construction to that of fig. 1, so that reference is made to the embodiment according to fig. 1. However, as is shown in fig. 3, the clutch device 1 according to the invention from fig. 4 has an outer plate carrier assembly 23 according to the invention integrated therein. Shown is a one-piece component comprising a second outer plate carrier 14 and a connecting web 13, which is fixedly coupled with its radially outer end to the first outer plate carrier 4. Furthermore, a bearing ring 24 is shown, which has axial and

radial bearing sections

25, 27 and

support sections

33, 34, see fig. 4, on which the

spring elements

11 and 20 are supported.

As fig. 6 shows in a first section in a sectional view, the axially extending toothed projection 31 of the second pressure vessel 19 passes through a corresponding first recess 30 in the radial flange 29 of the trunnion ring 24, while as fig. 7 shows in a second section, the latching projection 32 of the second pressure vessel 19 passes through and latches behind a latching receptacle 35 on the trunnion ring 24.

A series of advantages are achieved due to the reduction of components used to construct the outer plate bracket assembly 23. On the one hand, an increase in the axial rigidity of the assembly can be achieved because the connecting web 13 is constructed in one piece with the second outer web holder 14. Optimization of the installation space requirements can also be achieved by reducing the sheet metal thickness of the sheet metal components used and by omitting plug connections comprising a securing ring. In addition to the reduction of the production costs, an improvement in the assembly is also achieved by the elimination of two separate components, since fewer parts are assembled, and a simple transport safety device is also provided by the latching connection between the pressure vessel 19 and the bearing ring 24, which is supported by the self-closing force of the spring element 20. Finally, possible imbalances can be reduced, since fewer individual, sometimes defective components are provided.

List of reference numerals

1 Clutch device

2 sub-clutch

3 sub-clutch

4 outer sheet support

5 outer sheet

6 drive part

7 inner sheet support

8 inner sheet

9 driven part

10 pressure tank

11 spring element

12 support ring

13 connecting tab

14 outer plate support

15 outer sheet

16 inner sheet support

17 inner sheet

18 driven part

19 pressure tank

20 spring element

21 safety ring

22 latching section

23 outer panel bracket assembly

24 supporting ring

25 support section

26 tongue

27 support section

28 Flange

29 annular flange

30 first recess

31 projection

32 latching section

33 support section

34 support section

35 second recess.

Claims

1. Clutch device comprising a first partial clutch (2) having a first outer disk carrier (4) with first outer disks (5) and a radially inner second partial clutch (3) having a second outer disk carrier (14) with second outer disks (15), wherein the second outer disk carrier (14) is connected to the first outer disk carrier (4) by means of radially extending connecting webs (13), wherein each partial clutch (2, 3) has a pressure tank (10, 19) for actuating the partial clutch (2, 3), which pressure tank can be moved in the axial direction counter to spring elements (11, 20), wherein the spring elements (11, 20) are supported in the axial direction on a support means, characterized in that the second outer disk carrier (14) is embodied in one piece with the connecting webs (13), and the support means is embodied in the form of a one-piece bearing ring (24) having at least one axial bearing section (25) and/or at least one radial bearing section (27) for bearing against the second outer plate carrier (14) and the connecting web (13) and having two support sections (33, 34) for the spring elements (11, 20), a first recess (30) being formed on a radially inwardly extending annular flange (29) of the bearing ring (24), through which first recess an axially extending projection (31) of a pressure tank (19) of the second partial clutch (3) passes.

2. Clutch device according to claim 1, characterised in that the second outer plate carrier (14) and the connecting web (13) consist of modified sheet metal components and/or the bearing ring (24) consists of modified sheet metal components.

3. Clutch device according to claim 1 or 2, characterised in that a plurality of axial abutment sections (25) in the form of a plurality of radially projecting support tongues (26) are provided.

4. The clutch device according to claim 1 or 2, characterized in that the radial bearing section (27) is embodied in the form of an annularly encircling, axially extending flange (28).

5. Clutch device according to claim 1, characterised in that a plurality of second recesses (35) distributed around the circumference are provided on the annular flange (29), behind which latching sections (32) formed on the pressure pot (19) latch.

6. An outer plate carrier assembly for a radially inwardly arranged partial clutch of a clutch device according to one of the preceding claims, comprising an outer plate carrier (14) with a radially outwardly extending connection web (13) integrally molded thereon and a one-piece bearing ring (24) with at least one axial contact section and/or at least one radial contact section (25, 27) for bearing against the connection web (13) and the outer plate carrier (14) and two bearing sections (33, 34) with spring elements (11, 20) for the two partial clutches (2, 3), a first recess (30) being formed on a radially inwardly extending annular flange (29) of the bearing ring (24), through which first recess an axially extending projection (31) of a pressure tank (19) of the second partial clutch (3) passes And (4) hollowing.

7. The outer plate carrier assembly according to claim 6, characterized in that a plurality of axial abutment sections (25) in the form of a plurality of radially projecting support tongues (26) are provided, and/or that the radial abutment sections (27) are embodied in the form of an annularly encircling axially extending flange (28).

8. The outer plate carrier assembly according to claim 6, characterized in that a plurality of second recesses (35) which are distributed around the circumference and behind which latching sections (32) formed on the pressure tank (19) latch are provided on the annular flange (29).