DE102018001011A1 - Coupling device for a multi-plate clutch and multi-plate clutch with such a coupling device - Google Patents

Abstract

The present invention relates to a coupling device (44) for the plate carriers (22, 26) of a multi-disc clutch (24) with an annular disc or annular carrier element (54) which can be connected to a first disc carrier (22) in a first radial direction (8) or at least one coupling element (60) arranged on the carrier element (54), which is pivotable about a pivot axis (62) relative to the carrier element (54), for forming a positive rotational drive connection with a second plate carrier (26) the coupling element (60) is pivotable from a decoupling position into a coupling position, in which the coupling element (60) extends further in a second radial direction (10) opposite the first radial direction (8) than in the decoupling position. Moreover, the present invention relates to a multi-plate clutch (24) with such a coupling device (44).

Description

The present invention relates to a coupling device for the disk carrier of a multi-plate clutch. Moreover, the present invention relates to a multi-plate clutch with such a coupling device.

From practice, multi-plate clutches are known which have an outer disk carrier, an inner disk carrier and a disk set arranged between outer and inner disk carrier. In order to achieve a frictional rotational drive connection between the outer disk carrier and the inner disk carrier, the disk pack is further associated with an actuating element, by means of which an axial force can be applied to the disk set, the compression of the disk set and thus achieving a frictional connection between the outer and inner disks of the disk pack is used. The actuators are driven hydraulically. Thus, in order to connect the outer and inner disk carrier permanently frictionally via the disk set together, the hydraulic pressure within a pressure chamber associated with the actuating element must be kept constant high. This is associated with a correspondingly high energy consumption.

To reduce the energy demand of such multi-plate clutches, therefore, multi-plate clutches have been developed with an actuator in which the actuating element, which may also be referred to as a power transmission element, is formed separately from the driving actuating piston. To close the known multi-plate clutches, the actuating piston is displaced axially by correspondingly high pressure in the associated hydraulic chamber, wherein the actuating piston moves the actuating element in the same axial direction, so that this presses against the disk set. If the multi-plate clutch is closed, the actuating element is supported in the axial direction in order to exert the axial force permanently on the disk set. Since the actuating element is decoupled from the actuating piston, the hydraulic pressure exerted on the actuating piston can then be reduced, wherein the actuating element remains in its loading position and the multi-plate clutch thus remains closed. One can also speak here of a locking of the actuating element.

The known measure for locking a multi-plate clutch has been proven in terms of energy requirements, but this is characterized by relatively complex mechanisms in the piston area with high demands on tolerances, component stiffness and material strengths and a large space requirement.

It is therefore an object of the present invention to provide a coupling device for a multi-plate clutch, which overcomes the aforementioned disadvantages, in particular has a simple and space-saving design. In addition, the present invention has the object to provide a multi-plate clutch with such an advantageous coupling device for locking the multi-plate clutch.

This object is achieved by the in the claims 1 and 9 specified characteristics solved. Advantageous embodiments of the invention are the subject of the dependent claims.

The coupling device according to the invention serves to couple the plate carrier of a multi-plate clutch. Thus, the coupling device has an annular disc-shaped or annular carrier element. The carrier element is designed in such a way that it is connected to a first plate carrier in a first radial direction so that it can be provided with a rotational engagement contour or toothing on the carrier element, for example, in the first radial direction. Furthermore, at least one coupling element arranged on the carrier element is provided. In this case, it is preferred if a plurality of coupling elements are arranged on the carrier element, wherein in the case of a plurality of coupling elements and an annular disk or annular carrier element, the coupling elements are preferably distributed uniformly in the circumferential direction on the carrier element. The single coupling element is pivotable about a pivot axis relative to the carrier element, wherein the pivot axis preferably extends in the axial direction. The single coupling element serves to form a positive rotational drive connection with a second plate carrier of the multi-plate clutch. Thus, the coupling element can be pivoted from a decoupling position about said pivot axis into a coupling position, in which the coupling element extends further in a second radial direction opposite to the first radial direction than in the decoupling position. Thus, the coupling element extends in its coupling position so far in the second radial direction that this can engage in a corresponding rotational driving contour, preferably the plate support portion, a second disc carrier to effect a positive rotational drive connection between the first disc carrier on the one hand and the second disc carrier on the other.

As already stated above, the carrier element is designed such that it is in the first radial direction with the first plate carrier rotatably connected to the driver or connected to the driver. Thus, for example, the carrier element can also be integrally connected to the first plate carrier or welded or screwed thereto. In a preferred embodiment of the coupling device according to the invention, however, the carrier element is connectable or connected to form a positive rotational drive connection with the first plate carrier. In this case, it is preferable if the carrier element has a rotational engagement contour or toothing pointing in the first radial direction in order to form a positive rotary driving connection with the first plate carrier. Thus, the corresponding rotational driving contour or toothing on the carrier element, for example, cooperate with the disk support portion of the first disk carrier, which already has a rotational engagement contour or toothing for the first disk is in rotationally driving connection with the first disk carrier. The coupling device can thus be easily retrofitted in existing multi-plate clutches.

In a further preferred embodiment of the coupling device according to the invention, the carrier element, while enabling axial movability relative to the first plate carrier with the first plate carrier rotatably connected or rotationally connected, whereby a particularly simple use of the coupling device according to the invention within conventional multi-plate clutches is possible. The enabling of the axial mobility or the rotational driving connection to or with the first disk carrier can be achieved, for example, with the aid of the abovementioned rotary driving contour or toothing on the carrier element pointing in the first radial direction.

In a particularly preferred embodiment of the coupling device according to the invention, the coupling element has a first coupling portion, which is offset in the coupling position further in the second radial direction than in the decoupling position, and a second coupling portion, which is further offset in the coupling position in the first radial direction as in the decoupling position. This is particularly advantageous in that the first coupling section can serve for the rotational drive engagement with the second plate carrier, while the second coupling section can serve for the rotary driving engagement with the first plate carrier, so that in the coupling position of the coupling element the torque between the two plate carriers is exclusively, predominantly or can be done partly directly via the coupling element. In this way, in particular the bearing of the respective coupling element is relieved on the support member, especially since the torque is no longer completely, preferably not at all, must be transmitted to the second plate carrier via the support member, the said bearing and the coupling element. Thanks to this relief, the bearing of the coupling element can be made less stable on the support element, without causing damage to the coupling device due to stress.

In a further preferred embodiment of the coupling device according to the invention, the coupling element is designed in the manner of a rocker. Here, it is preferable if the above-mentioned first coupling portion and the aforementioned second coupling portion are formed on opposite sides of the rocker and the pivot axis of the rocker, respectively. The rocker-like design of the coupling element has the advantage that the centrifugal forces acting on the rocker-like coupling element can be at least partially or completely compensated for at high rotational speeds of the support element.

According to a further particularly preferred embodiment of the coupling device according to the invention, the coupling element has a center of mass, which is arranged substantially on the pivot axis to compensate for a centrifugal force influence on the coupling element such that said centrifugal forces do not lead to an unwanted pivoting of the coupling element about its pivot axis and might need to be compensated. Although it is preferred in this embodiment, when said center of mass is located directly on the pivot axis, the term "substantially" makes it clear that slight spacings of the center of mass with respect to the pivot axis are basically possible, but such a distance should preferably not be greater than 3 mm, more preferably not greater than 1 mm.

In an advantageous embodiment of the coupling device according to the invention, a restoring device is provided for returning the coupling element to the decoupling position, wherein the restoring device preferably acts between the respective coupling element and the carrier element. In order to simplify construction and operation of the coupling device, the return device is preferably designed as a return device for automatically resetting the coupling element in the decoupling position.

According to a further advantageous embodiment of the coupling device according to the invention, the aforementioned restoring device is designed as a spring device with at least one spring element for biasing the coupling element in the decoupling position. In particular, in the case of a rocker-like coupling element, a spring device with two spring elements for biasing the coupling element into the decoupling position has proven to be advantageous. Thus, one spring element can cooperate with the one section of the coupling element, while the other spring element can interact with the other section of the coupling element which is formed on the side of the pivot axis of the rocker-like coupling element opposite the first-mentioned section. With regard to an equally effective and space-saving bias of the coupling element in its decoupling position, a spring element has been found to be particularly suitable, which is designed as a leaf or bar spring. The corresponding leaf or bar spring preferably extends substantially in the circumferential direction in order to utilize the installation space available in the multi-plate clutch in a particularly effective and space-saving manner.

In a further advantageous embodiment of the coupling device according to the invention, the coupling element in its decoupling position in one of its two pivoting directions on the support element, preferably on a protruding approach to the support element, supported or supported. On the one hand, this has the advantage that any centrifugal forces acting on the coupling element can occur at high rotational speeds of the carrier element to no further pivoting beyond the decoupling position in said pivoting direction, especially not when the centrifugal forces are not arranged substantially on the pivot axis Mass center of the coupling element are compensated. On the other hand, the coupling element can be particularly easily biased by the aforementioned spring device with a relatively high force against the protruding approach, as is further preferred in the present embodiment.

In a particularly advantageous embodiment of the coupling device according to the invention, the at least one coupling element is pivotable by applying the coupling device with an axial force of the decoupling position in the coupling position. This makes it possible to use the axial force usually applied to the disk set of a multi-plate clutch also for the actuation of the coupling device, without this would require a further actuator.

According to a further advantageous embodiment of the coupling device according to the invention, the coupling device has a positive guide for converting the aforementioned axial force in a force acting on the coupling element torque to be pivoted by the torque from the decoupling position to the coupling position. The said positive guide can interact directly with the coupling element, for example, directly between the actuation element described in more detail later or even an actuating piston of the multi-plate clutch and the coupling element. Alternatively, the positive guide interact indirectly with the coupling element by the positive guide is formed for example between a shaft carrying the coupling element and the support member.

In a further preferred embodiment of the coupling device according to the invention, the coupling device has an optionally annular disc-shaped or annular actuation element, which is directly or indirectly, optionally by means of the carrier element, with the first plate carrier rotatably connected to the driver or connected. Said actuation element can be transferred from a first axial position relative to the carrier element with pivoting of the coupling element from the decoupling position into the coupling position into a second axial position relative to the carrier element. In this case, it is fundamentally irrelevant whether the carrier element or the actuation element is actively moved or displaced in order to reach the said axial positions of the actuation element relative to the carrier element. Nevertheless, it is preferred that substantially that element be moved over a greater distance, which has a lower weight or simpler structure, and this preferably should be said actuation element. Against this background, it is preferred in this embodiment, when the Aktuierungselement is moved over a greater distance than the support member or is movable to transfer the Aktuierungselement in the respective relative axial position to the support member. Moreover, it is preferred in this embodiment, when the Aktuierungselement is biased by the aforementioned restoring device in the form of a spring means and the positive guide in the first axial position relative to the support member. In principle, further restoring or spring devices could be provided in order to bias the actuation element into the first axial position relative to the carrier element, it is for the sake of a simple and space-saving construction of Coupling device, however, preferred when biasing the Aktuierungselements takes place in its first axial position relative to the support member exclusively by the aforementioned restoring device for biasing the coupling element in its decoupling position and on the forced operation.

Basically, said actuator could be rotatably or immovably connected to the first plate carrier, so for example, integrally formed therewith or welded to the first plate carrier or screwed, as long as then at least the carrier element is movable relative to the Aktuierungselement so that the Aktuierungselement the aforementioned axial positions can occupy relative to the support element. In a further preferred embodiment of the coupling device according to the invention, however, the actuation element can be connected or connected with the first plate carrier to form a positive rotational drive connection, wherein the actuation element is displaceable or movable relative to the first plate carrier, preferably in the axial direction. In this embodiment, it is preferred if the actuation element has a rotational engagement contour or toothing pointing in the first radial direction to form a positive rotational drive connection with the first plate carrier.

In principle, the carrier element and actuation element could be formed separately from one another. However, in order to achieve a compact and easy-to-install construction, the carrier element and the actuation element are connected to one another in a further advantageous embodiment of the coupling device according to the invention via at least one axial strut. It is preferred if two or more axial struts are provided. It is also preferred if carrier element, actuation element and coupling element are arranged captively against each other in order to form a module which is easy to construct.

In order to simplify the construction of the coupling device and to reduce its weight, the at least one coupling element is mounted pivotably about its pivot axis on the at least one axial strut for connecting the carrier element and the actuation element. Thus, the axial strut serves not only the connection of carrier element and Aktuierungselement, but also the storage of the respective coupling element. Consequently, it is preferred in this embodiment if the number of axial struts coincides with the number of coupling elements, one axial strut each serving to support one coupling element.

The at least one axial strut is provided between the carrier element and the actuation element in such a way that the carrier element and the actuation element are arranged captively against each other. Moreover, in a further preferred embodiment of the coupling device according to the invention, the axial strut interacts with the actuation element and the carrier element in such a way that a maximum axial distance between the actuation element and the carrier element is defined. Thus, the axial strut, for example, extend through recesses in the carrier element and actuation element in order to engage behind on their sides facing away from each other and support in opposite axial directions in order to specify the maximum axial distance between the Aktuierungselement and the carrier element. On the other hand, a displacement of the actuation element in the direction of the support element or / and of the support element in the direction of the actuation element along the axial strut should be ensured. In this context, a design has proven to be advantageous in which ensures a displacement of the Aktuierungselements in the direction of the support member along the axial strut and a displacement of the support member along the axial strut in the direction of the Aktuierungselements is prevented.

In a further preferred embodiment of the coupling device according to the invention, at least one actuation section is provided on the actuation element, which interacts with a section of the coupling element to form the positive guidance. It is preferred if at least the Aktuierungsabschnitt on the Aktuierungselement and / or the cooperating portion of the coupling element is formed like a ramp to achieve the desired conversion of acting on the coupling device axial force in acting on the coupling element torque. Also, the actuation element can advantageously have an axially projecting actuation section in order to interact with the section of the coupling element.

According to a further preferred embodiment of the coupling device according to the invention, a first actuation section cooperating with a first section of the coupling element and a second actuation section cooperating with a second section of the coupling element are provided on the actuation element. Thus, in this embodiment, at least two Aktuierungsabschnitte are associated with a single coupling element to achieve a safe conversion of the applied axial force in a force acting on the coupling element torque. Moreover, it is preferable if the first and second sections of the Coupling element are arranged on opposite sides of the pivot axis of the rocker-like coupling element to further enhance this advantage.

The multiple-disk clutch according to the invention has a first disk carrier, a second disk carrier and a disk set associated with the first and second disk carrier. The first and second plate carrier are frictionally engageable with each other in the rotary driving connection via the disk set. In this case, a coupling device of the type according to the invention is provided, via which the first and second disk carrier are decoupled from each other in the decoupling position of the coupling element with respect to a positive engagement and are positively in the coupling position of the coupling element in rotational driving connection. Thus, the use of the coupling device within the multi-plate clutch in particular allows a relatively small and thus space-saving disc set with a small number of slats, even if the multi-plate clutch is subjected to particularly high torques, especially as a secure coupling of the plate carrier is ensured via the coupling device. A disk set that is smaller in size and / or has fewer fins, moreover, can counteract an increased drag torque in wet-running multi-plate clutches and when the coupling device is open. With regard to the further advantages of the multi-plate clutch according to the invention and its embodiments, reference is also made to the above-described advantages of the coupling device according to the invention, which apply in a corresponding manner to the multi-plate clutch.

In an advantageous embodiment of the multi-plate clutch according to the invention, the first plate carrier has a first plate carrier section, with which at least one first plate of the plate packet and the carrier element of the coupling device are rotationally connected. The second plate carrier has a second plate carrier section, with which at least one second plate of the plate packet, which is arranged alternately with the at least one first plate, is rotationally connected. Although it is preferred if the disk set has two or more first sipes and two or more second sipes, then the coupling device within the multi-plate clutch already unfolds its advantages even if only a first sipe and a second sipe are provided. The coupling device is arranged between the Lamellentragabschnitten that the coupling element in the coupling position in rotational engagement and in the decoupling position except rotational engagement with the second plate support portion, optionally also the first disc support portion, is to achieve a positive connection between the two disc carriers in the coupling position, while in the decoupling position there is no positive rotational drive connection between the first and second plate carrier. Thus, the coupling device is arranged in this embodiment, saving space in the manner of a first blade on the first plate carrier, wherein the coupling device exploits the already existing Lamellentragabschnitte the two plate carrier to selectively positively interlock with each other or decouple from each other. Said lamella support sections of the lamella carriers are preferably of substantially tubular design and / or are formed to provide a rotational drive contour for the respective lamellae and the coupling device.

In a further preferred embodiment of the multi-plate clutch according to the invention, the coupling device is arranged at one end, more precisely one axial end of the disk set. For example, the coupling device can be arranged on the end facing an actuating element, that is to say on the end of the loading of the disk pack. Alternatively, however, the coupling device can also be arranged within the disk pack, although the former variant is preferred, in which the coupling device is particularly preferably arranged on the actuation side of the disk pack.

In a further preferred embodiment of the multi-plate clutch according to the invention, the carrier element and / or the actuation element can be brought into frictional contact with a second plate of the plate packet. Consequently, the carrier element or / and the actuation element also acts as a friction partner for the lamellae, so that the carrier element and / or actuation element has a double function. In this context, it has been found to be advantageous if the carrier element acts as a friction partner of a second lamella, while the actuation element is arranged on the side facing away from the second and first lamellae side of the lamella packet, which moreover preferably the Kraftbeaufschlagungsseite or acted upon by an actuator side of the disk pack forms.

In a further preferred embodiment of the multi-plate clutch according to the invention, which represents an alternative to the embodiment described above, the carrier element and / or the Aktuierungselement is brought or brought into contact with a first plate of the plate pack. Correspondingly, here is a first Lamella between the support element and / or the Aktuierungselement on the one hand and a second blade arranged on the other. Although the carrier element and / or the actuation element no longer assumes the mentioned double function, a smaller friction acting on the carrier element and / or the actuation element can be achieved in this way, whereby the carrier element and / or the actuation element can make easier use of the existing clearance ,

In an advantageous embodiment of the multi-plate clutch according to the invention, this further comprises an actuating element for applying an axial force on the disk set and the coupling device in order to compress the disk set and operate the coupling device can. The actuator can be driven in any way, preferably it is a hydraulically or electromechanically driven or driven actuator. The actuating element may, for example, be a simple force transmission element which can be driven by a hydraulic actuating piston or an electric motor or the actuating piston itself. It is further preferred if the actuating element is axially displaceable.

According to a further advantageous embodiment of the multi-plate clutch according to the invention, the axial force of the actuating element via the coupling device can be applied to the disk set, so that the coupling device acts mutatis mutandis between the actuating element and the disk set. In this arrangement, it is also preferred if the axial force of the actuating element is first applied or applied to the Aktuierungselement and only then via the carrier element on the disk set.

In a further advantageous embodiment of the multi-plate clutch according to the invention, the first disk carrier as the input side of the multi-plate clutch, thus as the side through which the torque of the motor is introduced into the multi-plate clutch, and / or formed as an outer disk carrier. Correspondingly, in this embodiment, the second plate carrier is designed as the output side of the multi-plate clutch and / or as an inner disc carrier. Although this embodiment has been found to be advantageous, it should be noted that, of course, a reverse training of first and second disc carrier possible, if not in individual cases even advantageous.

• 1 eine teilweise Seitenansicht einer Doppelkupplung mit einer Ausführungsform einer Kopplungsvorrichtung mit den Kopplungselementen in der Entkopplungsstellung in geschnittener Darstellung,
• 2 eine Querschnittsansicht entlang der Schnittlinie A-A in 1,
• 3 die Doppelkupplung von 1 mit den Kopplungselementen der Kopplungsvorrichtung in der Kopplungsstellung,
• 4 eine Schnittdarstellung entlang der Schnittlinie B-B in 3,
• 5 eine perspektivische Darstellung der Kopplungsvorrichtung aus den 1 bis 4 in Alleinstellung unter Weglassung des Aktuierungselements und mit den Kopplungselementen in der Entkopplungsstellung und
• 6 eine perspektivische Darstellung des Aktuierungselements der Kopplungsvorrichtung aus den 1 bis 4 in Alleinstellung.

The invention will be explained in more detail below with reference to an exemplary embodiment with reference to the accompanying drawings. Show it:

• 1 2 a partial side view of a double clutch with an embodiment of a coupling device with the coupling elements in the decoupling position in a sectional view,
• 2 a cross-sectional view along the section line AA in 1 .
• 3 the double clutch of 1 with the coupling elements of the coupling device in the coupling position,
• 4 a sectional view along the section line BB in 3 .
• 5 a perspective view of the coupling device of the 1 to 4 in isolation, omitting the Aktuierungselements and with the coupling elements in the decoupling position and
• 6 a perspective view of the Aktuierungselements of the coupling device of the 1 to 4 in isolation.

The 1 and 2 show a double clutch 2 , In the figures, the opposite axial directions 4 . 6 , the opposite radial direction 8th . 10 and the opposite circumferential directions 12 . 14 indicated by corresponding arrows, the double clutch 2 around one in the axial directions 4 . 6 extending axis of rotation 16 is rotatable.

The double clutch 2 has a clutch input hub 18 on, in the axial direction 4 with a drive unit, not shown in detail, for example, an internal combustion engine or electric motor, indirectly or directly drehmitnahmeverbindbar. The clutch input hub 18 is about a in the radial direction 8th extending drive plate 20 with a first plate carrier 22 a first multi-plate clutch 24 connected. As a result, the first disk carrier formed as an outer disk carrier forms 22 the input side of the first multi-plate clutch 24 and also the double clutch 2 out. In addition, the first multi-disc clutch has 24 a second plate carrier 26 in the form of an inner disk carrier, extending in the radial direction 10 extends inwardly to be rotatably engageable with a first transmission input shaft, not shown. Both the first plate carrier 22 as well as the second plate carrier 26 each have a slat support section 28 . 30 on, wherein the Lamellentragagabschnitte 28 . 30 are substantially tubular and have a rotational engagement contour or toothing to the outer and inner plates of the first multi-plate clutch 24 to obtain a rotational drive connection, but maintaining an axial displacement of the slats. How out 1 can be seen, the first multi-plate clutch 24 only one outer plate and only one inner plate on, although here quite a number of inner and outer plates could be provided, which - as in 1 shown - in the axial direction 4 . 6 alternately succeed each other. From the foregoing description, it can be seen that the second disc carrier 26 in the form of the inner disk carrier, the output side of the first multi-plate clutch 24 forms, wherein the first and second plate carrier 22 . 26 via the disk set of the first multi-plate clutch 24 frictionally engaged with each other in rotary driving connection. Hereinafter, the sipe carrying portion will be described 28 as first slat support section 28 during the slat support section 30 as second slat support section 30 should be designated.

The first plate carrier 22 has a starting from the in the axial direction 6 facing end of the first slat support section 28 in the radial direction 10 inwardly extending support portion 32 on, in the radial direction 10 inside with a clutch hub 34 rotatably connected. To an axial force 36 for compressing the disk set of the first multi-plate clutch 24 to apply and thus the first multi-plate clutch 24 to close, is a hydraulically driven actuator 38 for applying the axial force 36 on the disk pack of the first multi-plate clutch 24 provided in the axial direction 6 next to the support section 32 of the first disk carrier 22 is arranged. The actuator 38 is at its in radial direction 10 inwardly facing end portion acted upon by a hydraulic pressure to the axial force 36 to create. So the actuator extends 38 in the radial direction 8th to the outside, wherein on the in the radial direction 8th outwardly facing end portion of the actuating element 38 actuating fingers 40 are provided, extending in the axial direction 4 through windows 42 in the support section 32 of the first disk carrier 22 extend to the disc pack of the first multi-plate clutch 24 to be able to act. The actuating fingers 40 are in the circumferential direction 12 . 14 evenly distributed on the actuator 38 provided and extend through correspondingly uniformly distributed window 42 in the support section 32 of the first disk carrier 22 ,

How out 1 can be seen, the axial force acts 36 but not directly on the slats of the first multi-plate clutch 24 Rather, it is in the axial direction 4 . 6 between the actuating fingers 40 and the fins of the first multi-plate clutch 24 as well as in the radial direction 8th . 10 between the Lamellentragabschnitten 28 . 30 a coupling device 44 arranged so that the axial force 36 via the coupling device 44 on the disk pack of the first multi-plate clutch 24 can be applied. More specifically, the axial force acts 36 first on an actuation element 46 the coupling device 44 , wherein the construction of the coupling device 44 will be explained in more detail later.

The double clutch 2 also has a second multi-plate clutch 48 on, in the radial direction 8th . 10 with the first multi-plate clutch 24 is arranged nested, wherein the second multi-plate clutch 48 as in the radial direction 10 internal second multi-plate clutch 48 is trained. The second multi-plate clutch 48 has an input-side plate carrier 50 and an output side plate carrier 52 on, which are designed as outer disk carrier and inner disk carrier and the disk set of the second multi-plate clutch 48 can be frictionally engaged with each other in rotary driving connection, wherein the input-side plate carrier 50 is essentially formed by a slat supporting portion, in the axial direction 6 rotatably with the support section 32 of the first disk carrier 22 connected is. The designed as an inner disk carrier output side plate carrier 52 however, extends in the radial direction 10 inwardly to be brought into rotational drive connection with a second transmission input shaft, not shown. Also the disc pack of the second multi-disc clutch 48 is compressible via a hydraulically driven actuator.

Marriage closer to the operation of the first multi-plate clutch 24 will be discussed first, the structure of the aforementioned coupling device 44 with reference to the 1 . 2 . 5 and 6 to be discribed.

The coupling device 44 serves the optional positive rotational drive connection between the first plate carrier 22 and the second disc carrier 26 the first multi-plate clutch 24 , Thus, the coupling device 44 an annular, more precisely annular disk-shaped carrier element 54 on, which is continuous in the circumferential direction 12 . 14 and substantially in one of the radial directions 8th . 10 spanned plane extends, wherein the support element 54 on the operating fingers 40 facing away and the disk set of the first multi-plate clutch 24 facing side of the coupling device 44 is arranged. The carrier element 54 is in the first radial direction 8th with the first plate carrier 22 rotatably connectable or interconnected, as in 1 is shown. In this case, the support element 54 under formation of a form-locking rotational driving connection with the Panel support section 28 of the first disk carrier 22 connectable or connected, wherein the carrier element 54 for this purpose one in the first radial direction 8th pointing rotational drive contour or teeth for forming the positive rotational drive connection with the first plate carrier 22 having. The in the circumferential direction 12 . 14 spaced apart teeth 56 on the carrier element 54 are in particular in 5 to recognize, with the teeth 56 in each case a central incision 58 in the radial direction 10 have inside. Consequently, the carrier element 54 while allowing axial mobility or displaceability in the axial direction 4 . 6 relative to the first slat support portion 28 of the first disk carrier 22 with the first plate carrier 22 torque-connectable or torque-connected.

On the in the axial direction 6 pointing and the actuation element 46 facing side of the support element 54 are several coupling elements 60 arranged in the circumferential direction 12 . 14 evenly distributed on the support element 54 are attached. Thus, there is a rotary driving connection between the coupling elements 60 and the carrier element 54 in the circumferential directions 12 . 14 , Moreover, the single coupling element is 60 one at a time in the axial direction 4 . 6 extending pivot axis 62 relative to the carrier element 54 pivotable.

The coupling elements 60 serve to form a positive rotational drive connection with the second plate carrier section 30 on the second plate carrier 26 such that a positive rotational drive connection between the first plate carrier 22 and the second disc carrier 22 . 26 by means of the coupling device 44 can be achieved, as will be explained later.

The coupling element 60 is formed in the manner of a rocker, which is about the pivot axis 62 is pivotable. For this purpose, each of the coupling elements 60 one in the axial direction 4 . 6 extending axial strut 64 assigned to the support element 54 at least in the circumferential directions 12 . 14 and the radial directions 8th . 10 is fixed and at the respective coupling element 60 around the pivot axis 62 is pivotally mounted. For this purpose, the axial strut extends 64 through a substantially central recess 66 in the coupling element 60 , wherein an intermediate sleeve 68 in the recess 66 is introduced, via the coupling element 60 on the axial strut 64 Achieving the pivoting about the pivot axis 62 stored or supported. How out 1 seen, the sleeve has 68 at its in the axial direction 4 furthermore, a flange portion, over which the coupling element 60 at the in the axial direction 6 facing side of the support element 54 can be supported or supported. The named sleeve 68 together with the flange portion can either pivot with the respective coupling element 60 or rotationally fixed with the axial strut 64 be connected. The former variant has the advantage of a simplified production, while the second-mentioned variant of the determination of the axial strut 64 also in the axial direction 4 . 6 on the carrier element 54 can serve when the flange portion of the sleeve 68 at the in the axial direction 6 facing side of the support element 54 is supported while the axial strut 64 itself by means of a widened head on the in the axial direction 4 facing side of the support element 54 can be supported or supported. Alternatively, for axial fixing of the axial strut 64 also pressing in or otherwise attaching the axial strut 64 within the in 1 visible attachment opening in the support element 54 respectively. In a further alternative, however, it is also possible, the axial strut 64 not in the axial direction 4 . 6 on the carrier element 54 to fix.

Due to the rocker-like construction of the coupling element 60 this one has a first arm 70 and one on the opposite side of the pivot axis 62 arranged second arm 72 on. The two arms 70 . 72 are designed such that the coupling element 60 having a center of mass substantially on the pivot axis 62 is arranged to prevent unwanted pivoting of the coupling element 60 due to acting centrifugal forces at high speed of the support element 54 largely to prevent. On the first arm 70 more precisely at its in the circumferential direction 14 and in the radial direction 10 inward-facing side is a first coupling section 74 formed in the radial direction 10 protrudes. In addition, on the second arm 72 a second coupling section 76 intended. The second coupling section 76 is at the circumferential direction 12 and in the radial direction 8th outwardly facing end portion of the second arm 72 provided and is substantially in the radial direction 8th outward. Both coupling sections 74 . 76 are formed tooth-like, so that these on the one hand to the interdental spaces in the rotational engagement contour of the second plate-carrying portion 30 and, on the other hand, to the interdental spaces in the rotational engagement contour of the first disc supporting portion 28 fit.

Furthermore, on the first arm 70 , here in the radial direction 8th above the first coupling section 74 , a ramp-like first section 78 intended. At the second arm 72 is, however, in the radial direction 10 below the second coupling section 76 a ramp-like second section 80 of the coupling element 60 educated. How out 5 can be seen, the two ramp-like sections 78 . 80 an opposite slope, both sections 78 . 80 opposite to one of the radial directions 8th . 10 spanned radial plane in the axial direction 4 . 6 are inclined. It can also be seen that the two ramp-like sections 78 . 80 on opposite sides of the pivot axis 62 the rocker-like coupling element 60 are arranged.

Thanks to the described arrangement of the coupling element 60 on the carrier element 54 can the respective coupling element 60 from in the 1 . 2 and 5 shown decoupling position in a first pivoting direction 82 around the pivot axis 62 in a coupling position, in the 3 and 4 is shown, to be pivoted. In the opposite second pivoting direction 84 can the respective coupling element 60 however, from the coupling position to the 3 and 4 again in the decoupling position after the 1 . 2 and 5 be pivoted.

As if from a comparison between the 4 and 2 can be seen, the coupling element extends 60 in the coupling position further in the radial direction 8th opposite radial direction 10 inside as in the decoupling position. Moreover, the coupling element extends 60 in the coupling position also in the radial direction 10 opposite radial direction 8th to the outside than in the decoupling position. More specifically, the first coupling section 74 in the coupling position 4 further in the radial direction 10 offset inwardly than in the decoupling position, while the second coupling portion 76 in the coupling position 4 further in the radial direction 8th is offset to the outside than in the decoupling position. The first coupling section engages 74 in the coupling position in a tooth space of the second disk support portion 30 of the second disc carrier 26 a, so that in the coupling position, a rotational drive engagement between the coupling device 44 and the second disc carrier 26 consists. Moreover, the second coupling section engages 76 in the coupling position of the coupling element 60 in the radial direction 8th outwardly into a tooth space of the rotary driving contour on the first disc supporting portion 28 a, to a rotational engagement between the first disc carrier 22 and the coupling element 60 the coupling device 44 to effect. Thus, via the coupling element 60 a direct positive rotational drive connection causes the storage of the coupling element 60 on the carrier element 54 relieved. Is the coupling element 60 on the other hand, in the decoupling position 2 , so is the first coupling section 74 except rotational drive engagement with the second disk support portion 30 of the second disc carrier 26 during the second coupling section 76 except rotational engagement with the first sipe supporting portion 28 of the first disk carrier 22 stands.

The coupling elements 60 can by applying the coupling device 44 with the axial force 36 in conjunction with the counteracting supporting force, by supporting the coupling device 44 at the first multi-plate clutch 24 and their support in the axial direction 4 at the drive disc 20 or / and a circlip arises, from the previously described decoupling position into the coupling position 4 be pivoted. For this purpose, the coupling device 44 the previously mentioned actuation element 46 on.

The actuation element 46 is annular, more specifically annular disc-shaped, formed, thus extending continuously in the circumferential directions 12 . 14 as well as in one of the radial directions 8th . 10 spanned radial plane. The substantially annular disc-shaped actuation element 46 is both direct and indirect, namely by means of the carrier element 54 , with the first slat carrying section 28 of the first disk carrier 22 torque-connectable or torque-connected. Again, a positive rotational drive connection with the first plate carrier 22 given, the axial displacement of the Aktuierungselements 46 in the axial direction 4 . 6 relative to the first plate carrier 22 allows. So has the actuation element 46 , in particular in 6 to see one in the radial direction 8th outward-facing rotational drive contour or toothing for forming a positive rotational drive connection with the first plate carrier 22 on, with the illustrated teeth 86 the toothing on the Aktuierungselement 46 in the interdental spaces of the rotary driving contour on the first plate support portion 28 of the first disk carrier 22 can engage, so that an immediate rotational driving connection between the actuation element 46 and the first plate carrier 22 can be produced.

In addition, the actuation element 46 over the axial struts 64 with the carrier element 54 connected. Through the axial struts 64 can therefore be complementary or alternative to the teeth 86 an indirect rotational drive connection with the first plate carrier 22 be generated, namely by means of the carrier element 54 , However, it is preferred in this case if the said rotary driving connection substantially or exclusively either via the teeth 86 directly or via the axial struts 64 done indirectly. The axial struts 64 serve to define a maximum axial distance 88 between the actuation element 46 and the carrier element 54 , So engages the respective axial strut 64 on the one hand, the carrier element 54 opposite side of the Aktuierungselements 46 and on the other hand, the actuation element 46 opposite side of the support element 54 in the respective axial direction 4 . 6 , so that thereby the maximum axial distance 88 between actuation element 46 and carrier element 54 is fixed in 1 is indicated. In this case, the respective axial strut extends 64 such by corresponding recesses 90 in the actuation element 46 in that the actuation element 46 starting from his position in 1 in the axial direction 4 along the axial struts 64 can be moved, as in 3 can be seen.

At the actuation element 46 are ramp-shaped and in the axial direction 4 protruding first actuation sections 92 as well as ramp-shaped and in the axial direction 4 protruding second Aktuierungsabschnitte 94 provided, wherein each two adjacent Aktuierungsabschnitte 92 . 94 one of the coupling elements 60 on the carrier element 54 assigned. More specifically, a first actuation section 92 a first section 78 of the coupling element 60 assigned during a second actuation section 94 a second section 80 the same coupling element 60 assigned. So forms a first actuation section 92 of the actuation element 46 in cooperation with a first section 78 of the coupling element 60 a first forced operation, while a second Aktuierungsabschnitt 94 of the actuation element 46 in cooperation with a second section 80 the same coupling element 60 forms a second forced operation, both positive guides of the conversion of the axial force 36 in a on the respective coupling element 60 acting torque serve to the coupling element 60 in the first pivoting direction 82 to pivot from the decoupling position to the coupling position. The positive guides mentioned here act directly with the respective coupling element 60 but, in principle, it is also a forced operation in question, which only indirectly with the coupling element 60 cooperates to bring this into the coupling position.

As in particular from 5 can be seen, the coupling device 44 Furthermore, a restoring device for automatically resetting the coupling element 60 from the coupling position to the decoupling position. In the illustrated embodiment, the restoring device is a spring device 96 with two spring elements 98 . 100 formed, the biasing of the coupling element 60 in its decoupling position after 5 serve. The two spring elements 98 . 100 , each between a spring suspension 102 on the carrier element 54 on the one hand and the coupling element 60 on the other hand, are formed in the illustrated embodiment as elongated blade or rod springs, which are substantially in the circumferential directions 12 . 14 extend, wherein the two spring elements 98 . 100 in the axial direction 4 or 6 , here in the axial direction 6 , side of the support element 54 are arranged. Due to the spring elements 98 . 100 of which the one spring element 98 with a spring suspension 102 on the one hand and the first arm 70 of the coupling element 60 on the other hand cooperates and of which the spring element 100 on the one hand with a spring suspension 102 and on the other hand with the second arm 72 of the coupling element 60 cooperates, a bias or torque is generated in the pivoting direction 84 around the pivot axis 62 on the coupling element 60 works to put this in the 5 to bias the shown decoupling position.

To the coupling element 60 safely and accurately bias in its intended decoupling position, is the coupling element 60 in the decoupling position in the pivoting direction 84 on the carrier element 54 supportable or supported. For this purpose, each of the coupling elements 60 one in the axial direction 6 prominent approach 104 on the carrier element 54 assigned to which the coupling element 60 in its decoupling position, here over the first arm 70 , supportable or supported. The spring elements 98 . 100 clamp the coupling element 60 against the respective salient approach 104 in front.

Below is the operation of the first multi-plate clutch 24 in connection with the coupling device 44 with reference to the 1 to 4 explained in more detail.

In the 1 and 2 is the first multi-plate clutch 24 open. Between the first plate carrier 22 and the second disc carrier 26 There is neither a frictional nor a positive rotational drive connection. The actuation element 46 the coupling device 44 is in a first axial position relative to the carrier element 54 , wherein between actuation element 46 and carrier element 54 the maximum axial distance 88 is trained. The coupling elements 60 are due to the spring device 96 or the spring elements 98 . 100 biased in its decoupling position.

If the first multi-plate clutch 24 be closed, then the actuator 38 hydraulically in the axial direction 4 driven so that the actuating fingers 40 with an axial force 36 on the coupling device 44 more precisely to the actuator element 46 the coupling device 44 Act. Due to the biasing force of the spring device 96 At first not only the coupling elements become 60 held in their decoupling position, but rather causes the spring device 96 via the positive guides between the respective coupling element 60 and the actuation element 46 initially also a biasing of the Aktuierungselements 46 in the first axial position relative to the carrier element 54 so that the maximum axial distance 88 is first maintained and the coupling device 44 in total against the disk set of the first multi-plate clutch 24 is pressed, consequently, in the axial direction 4 at the drive disc 20 and / or a circlip is supported. In this case, forms the carrier element 54 equally a friction partner for one with the second plate carrier 26 in Drehmitnahmeverbindung standing lamella, wherein in the axial direction 4 facing side of the support element 54 brought into frictional contact with said blade. Due to the friction within the disk set of the first multi-plate clutch 24 Initially, a frictional connection between the first and second plate carrier, which may be subject to slip, first arises 22 . 26 , so that the rotational speeds of said plate carrier 22 . 26 at least match or synchronized.

Exceeds the axial force 36 in the course of closing the first multi-plate clutch 24 those of the spring devices 96 via the forced guides on the actuation element 46 applied restoring force, then the Aktuierungselement 46 from the first axial position relative to the carrier element 54 in the axial direction 4 in a second axial position relative to the carrier element 54 moved or convicted, as in 3 is shown. When transferring into the second axial position, the actuation sections act 92 . 94 of the actuation element 46 so with the sections 78 . 80 at the coupling elements 60 together, that the latter forcibly guided and against the restoring force of the spring elements 98 . 100 in the swing direction 82 around the pivot axis 62 from the decoupling position into the coupling position after the 3 and 4 be pivoted. The coupling sections grip 74 . 76 in the rotational driving contours of the Lamellentragabschnitte 30 . 28 of the second and first disk carrier 26 . 22 , so that in the coupling position of the coupling elements 60 a positive rotational drive connection between the disk carriers 22 . 26 via the coupling elements 60 is effected.

From the example described above, it can be seen that the coupling device 44 at one end of the disk pack, here at the axial direction 6 pointing end and the loading side of the disk set of the first multi-plate clutch 24 is arranged. Alternatively, the coupling device 44 but also at the opposite end, ie at the axial direction 4 pointing end and thus no longer at the admission side of the disk set of the first multi-plate clutch 24 be arranged. As a further embodiment is conceivable in this context that the coupling device 44 also within the disk pack of the first multi-plate clutch 24 is arranged. In such a case and beyond, instead of the axial struts shown here 64 which are not adjustable in length, also extendable and / or shortenable axial struts 64 are used to project the axial struts 64 in the axial direction 4 or 6 via the actuation element 46 to avoid, if the actuation element 46 in its second axial position relative to the carrier element 54 is transferred. So would come as axial strut 64 For example, a telescopically formed axial strut 64 in question.

LIST OF REFERENCE NUMBERS

2

Double coupling

4

axial direction

6

axial direction

8th

radial direction

10

radial direction

12

circumferentially

14

circumferentially

16

axis of rotation

18

Kupplungseingangsnabe

20

driver disc

22

first plate carrier

24

first multi-plate clutch

26

second plate carrier

28

first slat support section

30

second slat support section

32

support section

34

clutch

36

axial force

38

actuator

40

actuating fingers

42

window

44

coupling device

46

Aktuierungselement

48

second multi-plate clutch

50

input-side plate carrier

52

output-side plate carrier

54

support element

56

teeth

58

incision

60

coupling elements

62

swivel axis

64

Axialstrebe

66

recess

68

shell

70

first arm

72

second arm

74

first coupling section

76

second coupling section

78

first section

80

second part

82

first pivoting direction

84

second pivoting direction

86

teeth

88

maximum axial distance

90

recesses

92

first actuation sections

94

second actuation sections

96

spring means

98

spring element

100

spring element

102

spring suspension

104

approach

Claims (11)

Coupling device (44) for the plate carrier (22, 26) of a multi-disc clutch (24) with a ring-disc or annular support member (54) in a first radial direction (8) with a first plate carrier (22) connected to the driving or Drehmitnahmeverbunden, and at least one coupling element (60) arranged on the carrier element (54), which is pivotable about a pivot axis (62) relative to the carrier element (54), for forming a positive rotational drive connection with a second plate carrier (26), wherein the coupling element (60) can be pivoted from a decoupling position into a coupling position, in which the coupling element (60) extends further in a second radial direction (10) opposite the first radial direction (8) than in the decoupling position. Coupling device (44) according to Claim 1 , characterized in that the carrier element (54) with formation of a positive rotational driving connection with the first plate carrier (22) is connectable or connected, preferably in the first radial direction (8) facing rotational driving contour or toothing for forming a positive rotational drive connection with the first plate carrier (22), and / or while allowing axial movability relative to the first disc carrier (22) to be connected to the first disc carrier (22) in a rotationally connectable or rotationally connected manner. Coupling device (44) according to one of Claims 1 or 2 characterized in that the coupling member (60) has a first coupling portion (74) further displaced in the coupling position in the second radial direction (10) than in the decoupling position, and a second coupling portion (76) in the coupling position further in the first radial direction (8) is offset than in the decoupling position, and / or in the manner of a rocker is formed and / or having a center of mass, which is arranged substantially on the pivot axis (62). Coupling device (44) according to any one of the preceding claims, characterized in that a return device for, optionally automatically, returning the coupling element (60) is provided in the decoupling position, wherein the return device preferably as spring means (96) with at least one spring element (98; ) for biasing the coupling element (60) in the decoupling position is formed and the at least one spring element (98; 100) is particularly preferably designed as a leaf or bar spring, which optionally extends substantially in the circumferential direction (12, 14), and / or the coupling element (60) in the decoupling position in a pivoting direction (84) on the support element (54), preferably on a protruding projection (104) on the support element (54), supported or supported, wherein the coupling element (60) particularly preferably by the spring means (96) against the protruding projection (104) pre-spanked is annt. Coupling device (44) according to one of the preceding claims, characterized in that the coupling element (60) by applying the coupling device (44) with an axial force (36) from the decoupling position into the coupling position is pivotable, wherein the coupling device (44) preferably a positive guide for converting the axial force (36) into a torque acting on the coupling element (60) and the forced operation in particular preferably cooperates directly or indirectly with the coupling element (60). Coupling device (44) according to any one of the preceding claims, characterized in that the coupling device (44), optionally annular disc or annular actuation element (46) which directly or indirectly, optionally by means of the carrier element (54), with the first plate carrier (22) is connectable with a torque-transmitting connection or with rotation, wherein the actuation element (46) can be transferred from a first axial position relative to the carrier element (54) by pivoting the coupling element (60) from the decoupling position into the coupling position into a second axial position relative to the carrier element (54) is, preferably biased by the spring means (96) and the positive guide in the first axial position, particularly preferably with formation of a form-locking rotational drive connection with the first plate carrier (22) is connectable or connected and optionally one in the first radial direction (8) facing Rotary engagement contour or toothing for forming a positive rotational drive connection with the first plate carrier (22). Coupling device (44) according to Claim 6 , characterized in that the carrier element (54) and the Aktuierungselement (46) via at least one axial strut (64) are interconnected, on which the coupling element (60) is preferably pivotally mounted about the pivot axis (62), wherein the axial strut (64 ) particularly preferably with determination of a maximum axial distance (88) between the Aktuierungselement (46) and the carrier element (54) with the Aktuierungselement (46) and the carrier element (54) cooperates. Coupling device (44) according to one of Claims 6 or 7 , characterized in that on the Aktuierungselement (46) at least one, preferably ramp-like and / or axially projecting, Aktuierungsabschnitt 92; 94) is provided, which cooperates to form the positive guidance with a, preferably ramp-like, portion (78; 80) of the coupling element (60), wherein particularly preferably a first Aktuierungsabschnitt (92) on the Aktuierungselement (46) with a first portion (78 ) of the coupling element (60) and a second actuation section (94) on the actuation element (46) cooperate with a second section (80) of the coupling element (60) which may be located on opposite sides of the pivot axis (62) of the rocker coupling element (60) ) are arranged. Multi-plate clutch (24) with a first plate carrier (22), a second plate carrier (26) and a first and second plate carrier (22, 26) associated disk set, the first and second disk carrier (22, 26) via the disk set frictionally engaged with each other in Rotary driving connection can be brought, characterized in that a coupling device (44) according to one of the preceding claims is provided, via which the first and second plate carrier (22, 26) in the decoupling position of the coupling element (60) decoupled from each other and in the coupling position of the coupling element ( 60) are positively engaged with each other in rotary driving connection, wherein preferably the first plate carrier (22) has a first plate support portion (28), with the at least one first plate of the plate pack and the carrier element (54) are rotationally connected, and the second plate carrier (26) has a second plate carrying portion (30), with the minimum In the coupling position in rotational engagement and in the decoupling position, the coupling element (60) except in the rotational engagement engagement with the second disk support portion (30), optionally also the first Slat support portion (28), and the coupling device (44) is particularly preferably arranged at one end or within the disk pack or / and the carrier element (54) and / or Aktuierungselement (46) particularly preferably with the second blade in frictional contact or with the first blade is brought into or brought into contact. Multi-plate clutch (24) after Claim 9 , characterized in that an actuating element (38) for applying an axial force (36) on the disk set and the coupling device (44) is provided, wherein the axial force (36) of the actuating element (38) preferably via the coupling device (44), in particular preferably first on the Aktuierungselement (46), can be applied to the disk set. Multi-plate clutch (24) according to one of Claims 9 or 10 , characterized in that the first plate carrier (22) is formed as an input side of the multi-disc clutch (24) and / or as an outer disc carrier, while the second disc carrier (26) is designed as an output side of the multi-disc clutch (24) and / or as an inner disc carrier.

Images