WO2019219540A1

WO2019219540A1 - Coupling arrangement having a housing and having an absorber system

Info

Publication number: WO2019219540A1
Application number: PCT/EP2019/062071
Authority: WO
Inventors: Thomas Bauer; Martin LOBENSTEIN; Michael Wirachowski; Sebastian Neugebauer
Original assignee: Zf Friedrichshafen Ag
Priority date: 2018-05-17
Filing date: 2019-05-10
Publication date: 2019-11-21
Also published as: DE102018207774A1

Abstract

A coupling arrangement (1) is provided with an absorber system (2), which comprises an absorption mass carrier (44; 44') and at least one absorption mass (45) that can be deflected relative to the absorption mass carrier (44; 44'), and having a housing (3), which comprises two housing parts (5, 6) permanently which are connected to each other by means of a fixed connection and of which at least one housing part (6) has a recess (52; 52') for at least one protrusion (50; 50') from the other housing part (5). The at least two housing parts (5, 6) can be joined together so as to accommodate the absorption mass carrier (44; 44') between the recess (52; 52') of the one housing part (6) and the protrusion (50; 50') of the other housing part (5) and in such a manner that the housing parts (5, 6) are loaded, in the course of the fixed connection being generated, by a pressing force acting on the housing parts (5, 6) in the direction of the absorption mass carrier (44; 44').

Description

Kupplunqsanordnunq with a housing and a Tilqersvstem

The invention relates to a clutch arrangement with a damping system which has an absorber mass carrier and at least one absorber mass deflectable relative to the absorber mass carrier, and having a housing which has at least two housing parts which are permanently interconnected by means of a permanent connection, of which at least one housing part has a recess for has at least one projection of the other housing part.

Such a clutch arrangement is known from DE 10 2012 219 738 A1, which shows in FIG. 9 a clutch arrangement designed as a hydrodynamic torque converter. The housing part, which has the projection, is provided for the purpose of forming a hydrodynamic component, such as an impeller, and also encloses the absorber system radially. The projection of this housing part engages with its end facing the other housing part into the recess of this housing part, which is provided in the peripheral area of this housing part at its radial inner side. The projection and the recess thus overlap both radially and axially. This contact area of the two housing parts is secured by a fixed connection in the form of a weld, whereby the two housing parts are permanently connected to each other.

The absorber system of this clutch arrangement has a Tilgermassenträger, which has two mutually axially spaced Tilgermassenträgerelemente axially receive the at least one absorber mass between them. One of these Tilgermassenträgerelemente is centered on an output hub as a first component, which is associated with a torsional vibration damper, and rotatably received on another component of this torsional vibration damper. Accordingly, at least two components are required in order to absorb and apply the absorber system in the desired manner.

The object of the invention is to design a clutch arrangement with a housing and with a damping system in such a way that the damping system is provided with a housing. as few components as possible and with little technical effort can be absorbed and acted upon.

To achieve this object, a clutch arrangement is provided with a damping system which has an absorber mass support and at least one absorber mass which can be deflected relative to the absorber mass carrier, and with a housing which has at least two housing parts which are permanently interconnected by means of a permanent connection, of which at least one housing part has a recess for at least one projection of the respective other housing part.

Of particular importance here is that the at least two housing parts are joined together receiving the Tilgermassenträgers between the recess of a housing part and the projection of the other housing part, in such a way that the housing parts in the course of generating the fixed connection by a housing parts in Direction of Tilgermassenträgers acting contact pressure are loaded.

The contact pressure can, for example, arise because a fixed connection joining the at least two housing parts is formed by a weld. Here, the material shrinkage associated with the formation of the weld is used to build up the desired contact pressure, namely on the mutually facing end sides of the housing parts and / or on the radially inner side of the recess of the corresponding housing part with respect to the radial outside of the absorbed in this recess Tilgermassenträgers. If the absorber mass carrier is received between the recess of one housing part and the projection of the other housing part, it is acted upon by the construction of the fixed connection between the corresponding housing parts by an axially directed contact pressure force. By contrast, if the absorber mass carrier is clamped by the radial inner side of the corresponding housing part, the pressing force acts essentially in the radial direction. Regardless of the effective direction of the pressing force, this counteracts a relative movement of the absorber mass carrier relative to the housing parts. It is particularly important to avoid relative movements of the absorber mass carrier relative to the housing parts in the circumferential direction. The clamping caused by the fixed connection can be supported, for example, by forming the titanium mass carrier or, when it is designed with two absorber mass carrier elements axially spaced apart, by forming the at least one absorber mass carrier element on its radial outer side with a contour which In the course of the production of the fixed connection between the housing parts with respect to the recess of the corresponding housing part receives a rotationally locking function. As such a contour, the absorber mass carrier or the at least one absorber mass carrier element can have a polygon and / or at least one radial projection along its circumference on its radial outside. Alternatively, the Tilgermassenträger or the at least one Tilgermas- senträgerelement be provided with at least one recess along the circumference, wherein radially between this recess and the radially outer side of the at least one Tilgermassenträgerelementes a web remains, in the course of generating the fixed connection between the housing parts of a deformation which differs from the deformation of the absorber mass carrier or the at least one absorber mass carrier element in peripheral areas without a recess. These different shapes along the circumference can lead to discontinuities on the absorber mass carrier or on the at least one absorber mass carrier element on the outer circumference, which counteract undesired rotation of the absorber mass carrier relative to the housing parts.

With particular preference, the absorber mass carrier or at least one absorber mass carrier element is inserted into a housing in which both the recess for the projection and the projection itself is provided in each case in the peripheral region on an axial end of a housing part facing the respective other housing part, wherein the Projecting housing part from radially inside out of the recess having the housing part comes into contact. Since the absorber mass carrier engages in the recess of the housing part having the same axially adjacent to the projection of the corresponding housing part, and is supported with its side remote from the projection on one of the recess associated axial securing of the other housing part, it is clear that the Tilgermassenträger. As soon as the housing parts are loaded in the course of the production of the fixed connection by a contact force acting on the housing parts in the direction of one another, the previously mentioned clamping between the housing parts is experienced. This of course also applies to a Tilgermassenträger, which has two mutually spaced axial distance Tilgermassenträgerelemente, and engages with at least one Tilgermassenträgerelement or with two Tilgermassen- carrier elements between the projection of a housing part and the Axialsi- insurance of the other housing part. In both cases, it is to be assumed that the respective absorber mass carrier element of the absorber mass carrier is designed to protrude beyond the at least one absorber mass. In this regard, receiving both Tilgermassenträgerelemente it is advantageous if at least one Til- gassassenträgerelement is cranked on its radially outer side to the respective other Til- gassassenträgerelement. Due to this measure, it is possible to guide both absorber mass support elements in the engagement region between the projection of one housing part and the axial securing of the other housing part directly adjacent to one another in the recess of the corresponding housing part.

With particular preference, the coupling arrangement is designed as a hydrodynamic component, ie as a hydrodynamic torque converter or as a hydrodynamic coupling. In this case, one of the housing parts contributes to the formation of an impeller, said housing part preferably also encloses a turbine wheel, which is connected to an output, such as a transmission input shaft. The other housing part is preferably designed as a housing cover, which encloses the absorber system and, if appropriate, a coupling device in the form of a lock-up clutch, and is preferably capable of establishing a connection to a drive, such as an internal combustion engine. In this case, it is the projection of the one housing part which, with its end facing the other housing part, acts on the absorber mass carrier with an axial contact pressure. Preferably, the recess of the other housing part which serves to receive the absorber mass carrier is provided on its side facing away from the projection with a recess boundary, which delimits the axial forces transmitted from the projection to the absorber mass carrier. force is absorbed by axial support of the absorber mass carrier, and thereby effective for these as axial securing.

The coupling arrangement is explained in more detail with reference to a drawing.

It shows:

1 shows a section through a clutch arrangement with a damping system in a housing, wherein the absorber system has a Tilgermassenträger with two Til- germassenträgerelementen, which are arranged with axial offset from each other, and one of radially over Tilgermassenträgerelementen absorbed absorber masses out radially and in a Recess of the housing is received;

2, but with a Tilgermassenträger, in which both Til- gassassenträgerelemente over the absorber masses out radially and are received in the recess of the housing;

FIG. 3 shows an individual view of the absorber mass support element radially extended beyond the absorber masses according to FIG. 1, formed with recesses and radial overhangs offset from one another in the circumferential direction; FIG.

4 is an enlarged view of a radial projection of the Tilgermas- senträgerelementes of Fig. 3,

Figure 5 is a schematic representation of a Tilgermassenträgerelementes, as shown in Figure 3, but with training on the circumference as a polygon with transitions between the individual polygon areas.

FIG. 6, like FIG. 5, but with a configuration on the circumference as a polygon with edges between the individual polygon regions.

Fig. 1 shows a coupling arrangement 1, which is connected in a manner not shown with a drive, such as with the crankshaft of an internal combustion engine should be. The clutch assembly 1 has a housing 3, comprising a main housing part, which is referred to below as the first housing part 5, and a housing cover designated below as a second housing part 6. The in the housing parts 5 and 6 are connected to each other by means of a weld 7, and capable of a rotational movement about a central axis 2. The first housing part 5 serves to form a pump 8, which, like a turbine 9 and a stator 32, are in each case components of a hydrodynamic circuit 40. The housing 3 is at least partially filled with fluid medium.

The second housing part 6 has on the radial inner side 71 of its circumference a recess 52 in the form of a circumferential radial depression, this recess 52 serving as a receiving region 68 for a Tilgermassenträgerelement 43 of a Til- germassenträgers 44. The Tilgermassenträgerelement 43 is arranged with axial distance to another Tilgermassenträgerelement 42 of Tilgermassenträgers 44, wherein the two Tilgermassenträgerelemente 42 and 43 receive relatively movable axially between Tilgermassen 45. While the Tilgermassenträ- gerelement 43 for receiving in the recess 52 of the second housing part 6 is radially outward beyond the absorber masses 45 out radially outward, the Ti il- gassassenträgerelement 42 is adapted to adapt to the shape of the second housing part 6 radially shorter , and projects only into a radially central region of the absorber masses 45. The absorber mass support elements 42 and 43, like the absorber masses 45, are part of a damping system 4.

The recess 52 is formed on its side facing away from the hydrodynamic circuit 40 side with a radial transition 69, which is effective as Aussparungsbegrenzung 59 and thus as an axial stop 70 for the Tilgermassenträgerelement 43 in the direction from the hydrodynamic circle 40 direction. In the opposite direction, the Tilgermassenträgerelement 43 is acted upon axially by the free end 55 of a projection 50 of the first housing part 5.

For the production of the housing 3, the absorber system 4 is brought into the position shown in FIG. 1 relative to the housing 3, in which the radially larger absorber mass support element 43 is inserted into the receiving region 68 of the second housing part 6. is brought. The projection 50 comes with its free end 55 on the Tilgermas- support member 43 axially in abutment. Thereafter, the two housing parts 5 and 6 are pressed against each other by an externally applied axial force in the direction of the central axis 2 and welded. Due to the shrinkage of the weld seam 7 during cooling, not only does an axial prestressing remain between the two housing parts 5 and 6 after the externally applied axial force has been removed, but also a radial prestressing can remain. The axial preload, in cooperation with closely selected fits, ensures that the absorber mass-carrier element 43 in the receiving region 68 is pressed by means of the free end 55 of the projection 50 in the direction of the radial transition 69 serving as an axial stop 70, so that the absorber mass-carrier element 43 is axial is held clamped between the free end 55 of the projection 50 and the axial stop 70. The radial prestressing ensures that the radial inner side 71 of the recess 52 comes into operative connection with the radial outer side 72 of the absorber mass carrier element 43 and thereby at least inhibits a movement of the absorber mass carrier element 43 in the circumferential direction relative to the two housing parts 5 and 6.

Despite this clamping is to be taken with further measures to ensure that the Tilgermassenträgerelement 43 and thus the absorber system 4 rotatably in the housing 3 is added.

For example, according to FIGS. 3 and 4, the absorber mass support element 43 can be provided with at least one radial projection 46 along its circumference on its radial outer side. According to FIG. 3, a plurality of radial projections 46 are provided at predetermined peripheral distances from one another, for example offset by 45 ° in each case. The at least one radial projection 46 creates a contour 60a on the radial outer side of the absorber mass carrier element 43. Due to the shrinkage of the weld seam 7 during cooling, this contour 60a causes the second housing part 6 to undergo a different deformation in those areas in which at least one radial projection 46 is provided than in those areas in which no radial projection 46 is located. Alternatively or additionally, it can be provided according to FIG. 3 to provide the absorber mass carrier element 43 with at least one recess 53 along its circumference. To form the at least one recess 53, a point is selected on the absorber mass-carrier element 43, at which point a web 54 remains radially between the recess 53 and the radial outer side of the absorber mass-carrier element 43. This embodiment also uses the shrinkage of the weld seam 7 during cooling, in that the second housing part 6 undergoes a different deformation in the regions in which the respective recess 53 is located than in the regions which are spaced from a recess 53 in the circumferential direction are. Accordingly, the at least one recess 53 causes the formation of a contour 60b of the absorber mass carrier element 43 with respect to regions which are spaced apart from this recess 53 on the circumference, this contour 60b being provided in the radially outer region.

Alternatively, as shown in FIG. 5 or 6, the absorber mass carrier element 43 shown only schematically may be formed on its radially outer side as a polygon 47, either with transitions 56 between polygon regions 48a (FIG. 5) or with edges 57 between the polygon regions 48b (Figure 6). Thus, the transitions 56 or the edges 57 each form peripheral boundaries 58a, 58b of the polygon regions 48a, 48b. This embodiment also uses the shrinkage of the weld seam 7 during cooling, in that the second housing part 6 undergoes a different deformation in the areas of the circumferential boundaries 58a, 58b than in the polygon areas 48a, 48b. Accordingly, the polygon regions 48, like the peripheral boundaries 58a, 58b, act as a contour 60c of the absorber mass support element 43 on its radial outer side.

In the embodiments of FIGS. 1 to 5, an absorber mass carrier 43 is always assumed, which, unlike the further absorber mass carrier 42, extends radially beyond the absorber masses 45 in order to be received therein in the receiving region 68 of the housing 3. Alternatively, however, the absorber system 4 can also have a single absorber mass carrier 44, which accommodates absorber masses 45 in a relatively deflectable manner axially on both sides. Such a Tilgermassenträger 44 may also have one of the previously treated contours 60a, 60b or 60c. Also, one of the previously treated contours 60a, 60b or 60c may have a solution, which is shown in Fig. 2, and in the at least two Tilgermas- support elements 42 ', 43' of the absorber mass carrier 44 'on the at least one Til germasse 45 protruding are formed. At least one Tilgermassenträgerele- element 42 'of this Tilgermassenträgerelemente 42', 43 'is on its radial outer side on the other Tilgermassenträgerelement 43' to cranked so that both Tilger- mass support elements 42 ', 43' axially between the free end 55 of the projection. tot 50 of the first housing part 5 and serving as the axial securing 70 Aussparungbegrenzung 59 of the second housing part 6 in the recess 68 'of the corresponding housing part 6 are guided.

As shown in FIG. 2, the second housing part 6 is formed in an at least substantially axially extending radial region 10 with an internal toothing 11, via which drive-side coupling elements 12 are received in a rotationally fixed manner. The radial area 10 is therefore effective as outer coupling element carrier 13. Axially adjacent to the drive-side coupling elements 12 output-side coupling elements 14 are provided, which are rotatably received in an outer toothing 15 of an inner coupling element carrier 16.

Axially between an at least substantially radially extending housing wall 18 of the second housing part 6 and the drive drive coupling element 12 closest thereto is a clutch piston 20, which is axially displaceable on a housing hub 21 and pressure-tightly received by means of a seal 22. The clutch piston 20, together with the outer clutch element carrier 13, the clutch elements 12 and 14 and the inner clutch element carrier 16, forms a clutch device 30.

Between the housing wall 18 and the same side facing the clutch piston 20, a pressure chamber 23 is provided. On the other hand, adjacent to the opposite side of the clutch piston 20 is a cooling space 25, in which the clutch elements 12 and 14 as well as the inner clutch element carrier 16 of the clutch unit Direction 30 are also included as the absorber system 4 and the hydrodynamic circuit 40th

By an overpressure in the pressure chamber 23 relative to the cooling chamber 25 of the clutch piston 20 is displaced in the direction of the coupling elements 12 and 14, which are supported axially with their sides remote from the clutch piston 20 sides via a Axi albegrenzung 27 on the second housing part 6. The deflected in this way clutch piston 20 thus puts the coupling elements 12 and 14 in frictional engagement with each other, the coupling device 30 is engaged. In contrast, an overpressure in the cooling space 25 with respect to the pressure chamber 23 will cause the clutch piston 20 to be displaced in the direction away from the clutch elements 12 and 14, so that the friction connection between the clutch elements 12 and 14 is at least reduced and the clutch device 30 is disengaged.

The inner coupling element carrier 16 is connected by means of a riveting 28 as well as the turbine 9 with an output hub 35 which is rotatably connected via a toothing with a transmission input shaft 36.

Bezuaszeichen coupling arrangement

central axis

casing

absorber system

The main body portion

housing cover

Weld

pump

turbine

radial area

internal gearing

Drive-side coupling elements External coupling element carrier Output-side coupling elements External toothing

Inner coupling element carrier Housing wall

clutch piston

housing hub

seal

pressure chamber

refrigerator

clinch

coupling device

stator

output hub

Transmission input shaft

hydrodynamic circuit

Tilgermassenträgerelement

Tilgermassenträger absorber masses

Radial projection

polygon

polygon areas

head Start

recess

web

The End

transitions

edge

circumferential boundaries

Ausparungsbegrenzung

contour

reception area

Radial transition

axial stop

inside

outside

Claims

claims

A clutch arrangement (1) having a damping system (2) which has an absorber mass (45) which can be deflected via an absorber mass carrier (44; 44 ') and at least one absorber mass (45) which can be deflected relative to the absorber mass carrier (44; 44'), and with a housing (3), which has at least two housing parts (5, 6) which are permanently interconnected by means of a fixed connection, of which at least one housing part (6) has a recess (52, 52 ') for at least one projection (50, 50') of the each other housing part (5), characterized in that the at least two housing parts (5, 6) on acquisition of the Tilgermassenträgers (44, 44 ') between the recess (52, 52') of a housing part (6) and the projection (50, 50 ') of the other housing part (5) are joined in such a way that the housing parts (5, 6) in the course of the creation of the fixed connection by one of the housing parts (5, 6) in the direction of the absorber mass carrier (44; ') applied load force si nd.

2. Coupling arrangement (1) according to claim 1 with a housing (3), in which both the recess (52; 52 ') for the projection (50; 50') and the projection (50; 50 ') itself each in the radial Outside of the housing (3) and in each case on one of the other housing part (5, 6) facing axial end of a housing part (5, 6) is provided, wherein the projection (50; 50 ') having the housing part (5 ) comes into abutment on the radially inner side of the housing part (6) having the recess (52; 52 '), characterized in that the absorber mass carrier (44; 44') axially adjacent to the projection (50; 50 ') of the corresponding Ge - Housing parts (5) in the recess (52, 52 ') of the same housing part (6) engages, and with its from the projection (50, 50') facing away from the recess (52, 52 ') associated with axial securing (70, 70 ') of the other housing part (6) and / or with its the radial inside (71) d he recess (52, 52 ') facing radial outer side (72) on the radially inner side (71) of the recess (52, 52') is supported.

3. Coupling arrangement (1) according to claim 2 with a Tilgermassenträger (44, 44 '), which has two mutually axially spaced Tilgermassenträgerelemente (42, 43, 42', 43 '), characterized in that the Tilgermassenträger (44; 44 ') with at least one Tilgermassenträgerelement (42, 43, 42', 43 ') axially between the projection (50, 50') of the one housing part (5) and the axial securing (70, 70 ') of the other housing part (6 ) engages in the recess (52, 52 ') of the corresponding housing part (6).

4. Coupling arrangement (1) according to claim 3, characterized in that the absorber mass carrier (44; 44 ') or at least one absorber mass element (42, 43; 42', 43 ') of the same about the at least one absorber mass (45) protruding out - Is formed, and axially between the projection (50, 50 ') of the one housing part (5) and the axial securing (70, 70') of the other housing part (6) in the recess (68, 68 ') of the corresponding housing part (6 ) intervenes.

5. Coupling arrangement (1) according to claim 3 or 4, characterized in that at least two Tilgermassenträgerelemente (42 ', 43') of the Tilgermassenträgers (44 ') over the at least one absorber mass (45) are formed protruding, of which at least one Tilgermassenträgerelement ( 42 ') is cranked on its radially outer side to the respective other absorber mass support element (43'), wherein both Tilgergassenträgerelemente (42 ', 43') axially between the projection (50 ') of a housing part (5) and the axial securing ( 70 ') of the other housing part (5) in the recess (68') of the corresponding housing part (6) are guided.

6. Coupling arrangement (1) according to one of claims 1 to 4, characterized in that the Tilgermassenträger (44) or at least one Tilgermassenträ- gerelement (43) in the radial outer region over a contour (60a, 60b, 60c), the in the course of the generation of the fixed connection between the housing parts (5, 6) with respect to the recess (68) of the corresponding housing part (6) receives a rotationally secure function.

7. Coupling arrangement (1) according to claim 6, characterized in that the Til- germassenträger (44) or at least one Tilgermassenträgerelement (43) for Bil tion of the contour (60a, 60c) along its circumference at its radial outer side as a polygon (48) is formed and / or at least one radial projection (46) has up.

8. Coupling arrangement (1) according to claim 6, characterized in that the absorber mass carrier (44) or at least one absorber mass carrier element (43) for forming the contour (60b) is provided with at least one recess (53) along its circumference , wherein a web (54) remains radially between this recess (53) and the radial outside of the absorber mass carrier (44) or the radial outside of at least one absorber mass carrier element (43) , 6) is subjected to a deformation which differs from the deformation of the at least one absorber mass-carrier element (43) in circumferential regions without a recess (53).

9. Coupling arrangement (1) according to claim 1, characterized in that the fixed connection between the housing parts (5, 6) by means of a weld (7).

10. Coupling arrangement (1) according to claim 1 and 2 with a for forming a hydrodynamic component, such as a pump (8), at least contributing housing part (5), wherein at least one housing part (6), the at least one Tilgersystem (4) radially enveloped, characterized in that the projection (50, 50 ') of one housing part (5) with its end (55, 55') facing the other housing part (6) has the absorber mass support (44, 44 ') with an axial contact pressure and the recess (52; 52 ') of the other housing part (6) serving to receive the absorber mass support (44; 44') has a recess boundary (59; 59 ') on its side remote from the projection (5; 50'), which absorbs the axial force transmitted by the projection (50, 50 ') to the absorber mass support (44, 44') by axial support of the absorber mass support (44, 44 '), and thereby acts as an axial securing means (70, 70') for the same.