WO2009043719A1

WO2009043719A1 - Cover, particularly a clutch cover and clutch arrangement having the cover

Info

Publication number: WO2009043719A1
Application number: PCT/EP2008/062359
Authority: WO
Inventors: Ramon Jurjanz; Norbert Radinger
Original assignee: Schaeffler Kg
Priority date: 2007-10-04
Filing date: 2008-09-17
Publication date: 2009-04-09
Also published as: DE102007047510A1

Abstract

Clutch covers are usually used in clutch devices for the radial support of a shaft coupled to a drive unit, and form the transition between a dry side, on which the drive unit is disposed, and a wet side, on which the functional clutch elements, such as clutch lamellae, are disposed in an oil bath. The invention proposes a cover (6), particularly a clutch cover, for separating a dry side (2) from a wet side (3) in a drive train of a vehicle, having a base body (4), comprising a radially circumferential housing sealing device (7) for sealing the base body (11) from a housing (4), having a through opening (9) for inserting a shaft (5), and/or a coupling element of a shaft, comprising a bearing (10) for supporting the shaft (5), or the coupling element, having a shaft seal (8) for sealing the cover (6) from the shaft (5), or from the coupling element, and having a mounting body (13), mounted on the base body (11) and configured to receive the shaft seal (8) and/or the bearing (10).

Description

Cover, in particular clutch cover, as well as coupling arrangement with the lid

Field of the invention

The invention relates to a cover, in particular a clutch cover, for separating a dry side from a wet side in a drive train of a vehicle with a base body, with a radially encircling housing seal for sealing the base body relative to a housing, with a through hole for passing a shaft and / or a coupling element a shaft, with a bearing for supporting the shaft or the coupling element and with a shaft seal for sealing the clutch cover relative to the shaft or the coupling element and a corresponding coupling arrangement.

Such clutch covers are commonly used in coupling devices for the radial mounting of a shaft coupled to a drive unit and form the transition between a dry side on which the drive unit is arranged, and a wet side, on the Kupplungsfunktions- elements such. B. clutch plates in an oil bath, are arranged. Thus, such clutch cover put a double function, namely on the one hand, the stabilization of the shaft and on the other hand, the seal between dry side and wet side in a drive train of a vehicle.

The document DE 10 2004 0159 27 A1, which probably forms the closest prior art, describes a dual clutch device and a radial bearing concept adapted thereto. The dual clutch device is arranged in a drive train between the drive unit and the transmission and comprises a clutch housing, with a radially supported or supportable on the clutch housing closure wall in Shape of a lid for closing a housing opening. The closure wall comprises a central opening through which extends a coupling member belonging to an input side of the coupling device, to which the drive unit is coupled directly or indirectly or can be coupled. Zwi see the bordering to the opening edge region of the closure wall and the Ankoppelglied a radial bearing assembly and a shaft seal is provided. In the boundary region between the closure wall and the clutch housing, a further seal and a tolerance compensation device in the form of a rotating plate spring are arranged.

description

The object of the invention is to propose a cover, in particular a clutch cover, for separating a dry side from a wet side in a drive train of a vehicle and a clutch arrangement with improved service characteristics.

This object is achieved by a cover with the features of claim 1 and of claim 10 and with a coupling arrangement with the Merkma- len of claim 16. Preferred or advantageous embodiments of the invention will become apparent from the subclaims, the following description and the accompanying figures.

A first subject of the invention relates to a cover, in particular a clutch cover, which is designed and / or suitable for separating a dry side from a wet side in a vehicle drive train. In particular, this article relates to a clutch cover for a clutch assembly in the drive train. The lid is constructed in several parts and has a base body, which is formed of metal, and a radially encircling housing sealing device, which is designed to seal the base body relative to a housing. The housing sealing device is designed in particular as a circumferential groove into which an O-ring can be inserted and / or inserted. The housing seal direction is arranged in particular on or in a cylinder jacket-shaped side surface of the base body or on a side surface of the base body with a different course contour.

The cover has a preferably centrally arranged passage opening, which is designed to pass a shaft and / or a coupling element of a shaft. For supporting the shaft or the coupling element, the cover comprises a bearing which, depending on the design, receives radially outwardly acting loads or radially inwardly acting loads, in particular of the coupling element. In the latter case, the bearing is encompassed by the coupling element.

In addition, the lid comprises a shaft seal for sealing the lid relative to the shaft or with respect to the coupling element. Shaft seal and bearings are preferably arranged so that the bearing on the wet side, so in particular in the range of an oil bath, and the shaft seal are arranged on the dry side, wherein the shaft seal forms the boundary between the dry side and the wet side.

According to the invention it is proposed that the lid has an attachment body which is mounted on the base body and designed to receive the shaft seal and / or the bearing. The attachment body is formed prior to assembly as a separate component, which during the assembly of the lid z. B. material, force and / or positively connected to the body.

Through this constructive development several optional benefits are developed: First, the vibration behavior of the lid is improved by vibrations occurring are attenuated by the mechanical coupling of the body and the attachment body. In addition, the stability of the lid is increased. By an appropriate design of body and attachment body, it is possible to seal the shaft and / or to axially secure the bearing at least in one direction or even in both directions.

In a particularly preferred embodiment of the invention, the base body and / or the attachment body are each formed in one piece. In particular, the base body and / or the attachment body can each be realized as a forming part. In this case, it is preferable for the housing sealing device formed as a groove to be incorporated by way of forming technology into the formed part. As a result of said production method, the lid can be produced inexpensively.

In principle, the base body and attachment body can be connected to one another via any connection technique, but these are preferably connected to one another via a weld or via a clinching connection, also called a clinch connection. The clinching is a method of joining sheets without using a filler material by achieving the bond by reshaping the material of the bonding partners.

It is preferred that the base body for receiving the bearing has a cylindrical and / or hat-shaped shape. In this embodiment, the bearing is inserted and / or pressed in during the assembly of the lid.

The bearing may be formed in simple embodiments as a sliding bearing, but preferably the bearing is realized as a roller bearing, in particular as a needle bearing. The shaft seal is preferably designed as a contacting lip seal, preferably a first lip on the bearing, in particular on the outer ring of the bearing as axially oriented sealing lip and a second lip as a radially oriented lip on the shaft and / or the coupling element of the shaft sealingly supported. The sealing direction is preferably directed so that an escape of oil from the wet side is prevented in the dry side. The passage opening of the cover is formed in particular in the attachment body so that its free diameter is equal to or greater than the enveloping circle diameter of the rolling bearing realized. On the other hand, in particular in order to ensure sufficient stability, the free diameter is chosen to be smaller than the outer diameter of the bearing.

In a preferred embodiment, the lid is designed as a structural unit in which the bearing can only be removed destructively. This embodiment results from the fact that the shape of the base body and the attachment body form a space in which the bearing and the shaft seal are inserted and whose outputs in the form of the passage openings in diameter is smaller than the outer diameter of the bearing.

In particular, the base body and / or attachment body have a disk-shaped end section, which secures the shaft seal or the bearing in the axial direction.

A development or another object of the invention relates to a lid according to one of the preceding claims or according to the preamble of claim 1 optionally with any selection of the features just described or the dependent claims, wherein the lid has a locking device, which for locking the clutch cover in the housing is formed. Following the invention, it is proposed to form the locking device as a plurality of spaced apart in Umfangsgehchtung spaced and / or independent locking plates, which are mounted on the base body, in particular pivotally mounted.

This embodiment according to the invention has the advantage that the locking device is captively connected to the cover and is easy to operate both when the cover is first installed and during disassembly of the cover. The locking plates are preferably designed such that they are transferred from a locking position into a release position. are feasible, wherein the locking plates engage in the locking position in recesses or projections of the housing. In particular, the locking plates are arranged on the dry side of the lid.

In a preferred structural embodiment of the invention, the locking plates are formed as spring plates, which are made of a spring steel. Optionally, the locking plates can be supplemented with reinforcement plates

In a particularly preferred embodiment, the locking plates are connected via a riveted joint with the base body, wherein preferably the locking plates are each rotatable or pivotable about the own rivet. The locking plates are preferably designed such that a pivoting of less than 20 ° is sufficient to transfer the locking plates from the release to the locking position or in the opposite direction.

In a preferred embodiment of the invention, the locking device has a plurality of latching devices, which are formed so that the locking plates latch or snap into the locking position. In particular, the locking plates each have a shape, which engages or snaps in a form-fitting manner in a molding of the body. It is also possible that the locking plates have recesses and the base body formations which allow the latching in a corresponding manner. In general, locking plates and base body interact with each other and / or complementary to each other formed locking devices.

In a particularly preferred embodiment of the invention, the attachment body and / or the locking plates are mounted on the base body, so that it is not completely pierced. This embodiment has the advantage that the tightness of the lid is not weakened or disturbed by the connection points. It ensures that one remains liquid-tight and / or gas-tight continuous base layer of the body in the region of the connection points. In the case of the locking plates, this is achieved for example in that the rivet is formed as Halbhohlniet.

Another object of the invention relates to a coupling arrangement with a housing and with a lid of the housing, wherein the lid separates a dry side from a wet side of the housing, characterized in that the lid is designed according to one of the preceding claims.

Further features, advantages and effects of the invention will become apparent from the following description of a preferred embodiment of the invention and the figures. Showing:

Figure 1 is a schematic, not to scale sectional view of a clutch assembly as an embodiment of the invention;

Figure 2 is a schematic sectional view through the lid shown in Figure 1 for the separation of wet side and dry side;

Figure 3 is a schematic plan view from the dry side on the lid in Figure 2;

FIG. 4 shows a detailed detail from FIG. 2 in the same representation as in FIG

Figure 2;

FIG. 5 shows a detailed detail from FIG. 4 in the same representation as in FIG. 2;

FIG. 6 shows a further detail detail from FIG. 2 in the region of FIG

Locking device; FIG. 7 shows a detailed detail in FIG. 6.

Corresponding to one another or the same reference numerals designate corresponding or identical parts in each case.

1 shows a schematic cross-sectional view of a clutch assembly 1, which is arranged in a drive train between a drive unit (not shown) and a transmission (not shown). The section of the clutch assembly 1 shown in Figure 1 illustrates the transition from a dry side 2 on a wet side 3 of the clutch assembly 1, wherein on the wet side 3 functional elements of the clutch assembly 1, for example, are arranged in an oil bath. The clutch assembly 1 is housed in a housing 4, which is arranged stationary or quasi-stationary in the vehicle. For transmitting torque from the drive unit to the transmission, a shaft or a coupling element is provided on a shaft 5, which may be formed in one or more parts and extends from the dry side 2 in the wet side 3 of the clutch assembly 1.

For sealing the housing 4 with respect to the shaft 5, the coupling arrangement 1 has a cover 6, which is radially outer side sealed via a housing sealing device 7 in the form of a first O-ring relative to the housing 4 and a shaft seal 8 relative to the shaft 5. The shaft 5 pierces the cover 6 in the region of a passage opening 9, so that the cover 6 assumes a sealing function with respect to the shaft 5 and the housing 4. In addition to the sealing function of the cover 6 also forms a radial bearing for the shaft 5 and has for this purpose designed as a needle bearing 10 rolling bearing, which is arranged in the through hole 9 and through which the shaft 5 is rotatably mounted. The introduced into the cover 6 via the shaft 5 loads are transmitted through the cover 6 to the housing 4, so that the shaft 5 is indirectly supported via the housing 4 in the radial direction. FIG. 2 shows a schematic cross section through the cover 6 in FIG. 1 in order to illustrate its construction. The lid 6 has a circular base body 11, which is formed as a one-piece Blechumformteil. In the central region, the main body 11 shows a hat-shaped formation 12 into which the needle bearing 10 is inserted or pressed in and which has a passage opening 9a. On the base body 11, a cap body 13 is attached, which also has a hat-shaped profile in cross-section and which is designed as a receptacle of the shaft seal 8. The attachment body 13 has a passage opening 9b, wherein the passage openings 9a and 9b form the common passage opening 9. The attachment body 13 is also formed as a one-piece Blechumformteil. Starting from the central region, the base body 11 shows a curved toward the wet side 3 course, which then merges into the radial outer region of the base body 11 via a channel region.

FIG. 3 shows the cover 6 in an axial plan view from the dry side, the hat-shaped attachment body 13 and the passage opening 9 being again visible in the central area. Next radial-outward lying a plurality of beads are arranged in the circumferential direction, which are formed for stiffening of the base body 11 in this. Next in the radial direction outward again the channel can be seen. At the peripheral edge three locking devices 14 are shown, which are designed to lock the lid 6 in the housing 4. The structure of the locking devices will be explained in connection with FIGS. 6 and 7.

FIG. 4 shows detail detail X in FIG. 2, wherein the position of needle roller bearing 10 in hat-shaped formation 12 can again be clearly seen. The attachment body 13 is formed in its hat-shaped area in diameter larger than the hat-shaped portion of the formation 12 and carries the shaft seal 8, which as a lip seal with an axial sealing lip 15 which is sealingly supported on the outer ring of the needle bearing 10, and a radial Sealing lip 16, which sealingly on the shaft 5 off- supports, is formed. The free diameter 9b of the attachment body 13 is adapted to the enveloping circle of the needle bearing 10 and chosen slightly larger than this. The attachment body 13 is connected to the base body 11 via a so-called clinch connection 17.

FIG. 5 shows one of the clinch connections 17 in detail, wherein it can be seen that in the case of the clinch connection 17, both base body 11 and attachment body 13 are reshaped locally, whereby a form-locking connection is created. However, the clinch connection 17 is so pronounced that at least one boundary layer 18 of the main body 11 is maintained throughout and / or uninterrupted, so that a liquid or gas-tightness of the main body 11 in the region of the clinch connection 17 is ensured. For attachment of the attachment body 13, a plurality of clinch connections 17 are used, which are distributed in the circumferential direction on the hat brim of the attachment body 13, in particular regularly.

As is apparent in particular from a synopsis of FIGS. 2 and 4, the needle bearing 10 and / or the shaft seal 8 are enclosed in the installation space formed by the formation 12 and the attachment body 13 in such a way that this or these only destroys the installation space can be removed.

FIG. 6 shows the locking device 14 as detail detail Y in FIG. 2 in an enlarged view. The locking device 14 comprises a tab-like spring plate 19 which is pivotally mounted on the base body 11 via a rivet 20. The length of the spring plate 19 in the radial direction in Figure 6 is formed so that the free end of the spring plate 19 projects radially.

As can be seen in particular from FIG. 1, the housing 4 is provided with recesses 21 in the area of the cover 6, which recesses are designed to receive the spring plate 19, so that the cover 6 is locked against the housing 4 via the spring plates 19. To avoid dynamic effects in axia- In order to compensate for the direction of the spring plate 19 is pivoted via a spring travel 22 under bias in the receptacle 21. To reinforce the spring plate 19, this has a reinforcing sheet strip 23 (optional).

In FIG. 7, the area of the rivet 20 in FIG. 6 is again shown in detail, wherein it can be seen that the rivet 20 is designed as a foreign rivet which cuts an opening in the spring plate 19 or is made through an opening in the spring plate 19 and the base body 11 such that on the one hand a positive connection between the rivet 20, body 11 and spring plate 19 is created and on the other an intact boundary layer 18 of the base body 11 remains, so that in the area of the rivet 20 a liquid or gas tightness is ensured.

FIG. 6 also shows the radial outer region of the main body 11, wherein the main body 11 has a cylinder jacket-shaped contact surface 24, which is designed to rest on the housing 4 and via which the radial loads are transmitted from the shaft 5 to the housing 4. Preferably already during the forming process in the contact surface 24, a groove 25 is formed, in which an O-ring 26 is inserted, which together form the housing sealing device 7 for sealing the lid 6 relative to the housing 4.

The locking position of the spring plate 19 in the base body 11 shown in FIG. 6 is secured by a latching device which is formed from a latching recess 27 in the spring plate 19, which is designed as a projection, for example, and a latching element 28, which is embodied, for example, as a bead , consists. In the locking position, the latching formation 27 is latched into the latching recess 28, so that a positive and / or positive locking of the spring plate 19 is formed. In other embodiments, the Rasteinformungen - or formations designed differently, but preferably such that in the base body 11 at least one boundary layer 18 remains intact, so that a gas and / or liquid-tightness is guaranteed in the catcher. LIST OF REFERENCE NUMBERS

1 coupling arrangement

2 dry side

3 wet side

4 housing

5 wave

6 lids

7 housing sealing device

8 shaft seal

9 (9a - 9b) through hole

10 needle roller bearings

11 basic body

12 formation

13 attachments

14 locking devices

15 sealing lip

16 sealing lip

17 clinch connection

18 boundary layer

19 spring plate

20 rivet

21 recording

22 spring travel

23 reinforcing sheet strips

24 contact surface

25 groove

26 O-ring

27 Rastausformung

28 latch formation

Claims

claims

1. cover (6), in particular clutch cover, for separating a dry side (2) from a wet side (3) in a drive train of a vehicle with a base body (11), with a radially encircling housing sealing device (7) for sealing the base body ( 11) relative to a housing (4), with a passage opening (9, 9 a, b) for passing a shaft (5) and / or a coupling element of a shaft (5), with a bearing (10) for supporting the shaft (5 ) or of the coupling element and with a shaft seal (8) for sealing the cover (6) relative to the shaft (5) or the coupling element, characterized by an attachment body (13) mounted on the base body (11) and for receiving the Shaft seal (8) and / or the bearing (10) is formed.

2. lid (6) according to claim 1, characterized in that the base body (11) and / or the attachment body (13) are each formed in one piece and / or as a forming part.

3. lid (6) according to claim 1 or 2, characterized in that the base body (11) and the attachment body (13) are connected to each other via a weld or a clinching.

4. lid (6) according to any one of the preceding claims, character- ized in that the base body (11) has a cylindrical shape, in which the bearing (10) is inserted and / or pressed.

5. lid (6) according to any one of the preceding claims, characterized in that the bearing as a roller bearing, in particular as a needle bearing (10) is formed.

6. lid (6) according to any one of the preceding claims, characterized in that the shaft seal is formed as a contact lip seal (8).

7. lid (6) according to any one of the preceding claims 5 or 6, characterized in that the attachment body (13) has a further passage opening whose free diameter (9b) is equal to or greater than the enveloping circle diameter of the rolling bearing (10).

8. lid (6) according to any one of the preceding claims, characterized in that the bearing (10) in the lid (6) is arranged destructively removable.

9. lid (6) according to any one of the preceding claims, character- ized in that the base body (11) and / of the attachment body (13) optionally each have a disc-shaped end portion which the shaft seal (8) or the bearing (10 ) secures in the axial direction.

10. Lid (6) according to any one of the preceding claims or according to the preamble of claim 1 optionally with an arbitrary selection of features of the subclaims with a locking device (14) which is designed to lock the lid (6) in the housing (4) , characterized in that the locking device comprises a plurality of spaced apart in the circumferential direction and / or independent locking plates (19) which are pivotally mounted on the base body (11).

11. Lid (6) according to claim 10, characterized in that the locking plates (19) are designed as spring plates.

12. lid (6) according to any one of claims 10 or 11, characterized in that the spring plates (19) via a rivet connection (20) are connected to the base body (11).

13. Lid (6) according to one of the preceding claims, characterized in that the locking device (14) has a plurality of latching devices which are formed so that the locking plates engage in the locking position.

14. Lid (6) according to claim 13, characterized in that the latching device is formed by a formation (27) of the Verrieglungsbleche and an impression (28) of the base body (11), wherein in the locking position, the formation (27 ) is engaged in the indentation (28).

15. Lid (6) according to one of the preceding claims, characterized in that the attachment body (13) and / or the locking plates (19) in such a way on the base body (11) is fixed or are, so that it is not pierced.

16. Coupling arrangement (1) with a housing (4) and with a cover (6) of the housing, wherein the cover (6) separates a dry side (2) from a wet side (3) of the housing, characterized in that the cover ( 4) according to one of the preceding claims.