DE102019211079A1 - Coupling assembly with oil trap - Google Patents

Abstract

The invention relates to a clutch assembly for a vehicle and / or for a machine with a multi-plate clutch (10) for the frictional connection of a motor, in particular an internal combustion engine, with a gear, in particular with a differential gear, the clutch subassembly and / or the gear with a housing (20), a shaft (30) and a shaft-housing-bearing (40) for the rotatable mounting of the shaft (30) with respect to the housing (20). In a simple, inexpensive, space-saving and energy-efficient manner, a coupling arrangement can be provided and be operated that between the multi-plate clutch (10) and the housing (20) an oil channel (22) with an upper channel opening (22a) and a lower channel opening (22b) is formed, the housing (20) above the upper channel opening ( 22a) of the oil channel (22) has an oil catch rib (21) for catching oil (1), in particular splash oil, and wherein oil (1) from the oil catch fin (21) into the oil Oil channel (22) and through the shaft-housing-bearing (40) into the multi-disc clutch (10).

Description

The invention relates to a clutch assembly for a vehicle and / or for a machine with the features of the preamble of patent claim 1.

In vehicles and machines, for example in motor vehicles with hybrid drives or with hybrid transmissions, clutch assemblies can be used which have a, in particular wet-running and / or oil-cooled, multi-plate clutch for the frictional connection of an engine, for example an internal combustion engine, with a transmission, for example with a differential gear, include. Such coupling assemblies can furthermore comprise a housing, a shaft and a shaft-housing bearing for rotatably supporting the shaft with respect to the housing. The multi-disc clutch is generally supplied with oil, in particular the multi-disc clutch is thereby cooled.

From the EP 2 574 826 A1 A clutch assembly for a motor vehicle is known in which an oil delivery device in the form of a ring gear is provided for clutch lubrication. Here, a differential-free compensation unit is used, in which oil is shoveled through rotation from an oil delivery device formed by a ring gear to an oil collection pocket provided in the housing and from there into relatively long and narrow oil ducts formed in the housing wall.

However, the clutch assemblies known in the prior art are not yet optimally designed. The coupling assemblies known in the prior art are often very complex and / or very expensive to manufacture. For example, the production of long and narrow oil guide channels in the walls can be very expensive to manufacture. In addition, in the clutch assemblies known in the prior art, additional components, such as ring gears and / or valves, are often built in to lubricate the multi-plate clutch, which increases both the complexity and thus the required installation space as well as the manufacturing effort and the manufacturing costs. In addition, the clutch assemblies known in the prior art are often actively lubricated, in particular with the use of additional energy, for example for oil delivery and / or for valve control, whereby the energy efficiency of the system is reduced.

The invention is therefore based on the object of designing and developing the coupling assembly mentioned at the outset in such a way that the coupling assembly can be provided and operated in a simple, inexpensive, space-saving and / or energy-efficient manner.

The object on which the invention is based is now first achieved by the coupling assembly for a vehicle and / or for a machine with the features of claim 1.

In this case, the clutch assembly comprises a, in particular wet-running and / or oil-cooled, multi-plate clutch for the frictional connection of an engine, in particular an internal combustion engine, to a gear, in particular to a differential gear. The clutch assembly and / or the transmission further comprises a housing, a shaft and a shaft-housing bearing for the rotatable mounting of the shaft with respect to the housing or has the aforementioned components.

An oil channel with an upper channel opening and a lower channel opening is formed between the multi-plate clutch and the housing. Above the upper channel opening of the oil channel, the housing has an oil catching rib for catching oil, in particular splash oil. The oil can be guided from the oil catcher rib, for example initially, into the oil channel and, for example, finally, through the shaft-housing-bearing into the multi-disc clutch.

In this way, both the multi-disc clutch and the shaft-housing-bearing can advantageously be oiled in a simple, inexpensive, space-saving and energy-efficient manner and in this way the multi-disc clutch can be cooled and the bearing lubricated and cooled. Two functions, namely the lubrication of the multi-plate clutch and the lubrication of the shaft-housing-bearing, which in particular can also be designed to be relatively heavily shielded, can be fulfilled or implemented by the coupling assembly in a simple, inexpensive, space-saving and energy-efficient manner. The catching of oil, in particular splash oil, by the oil catcher rib is a passive process that does not require any additional expenditure of energy. The “passive” and, in particular, also sequential lubrication of the multi-plate clutch and the shaft-housing bearing achieved in this way can thus also be accomplished in a particularly energy-saving manner. The use of additional components, for example an oil delivery device, for example a ring gear, and / or a valve, for example a particularly complex, for example software-controlled, solenoid valve and / or an additional oil guide device, is not necessary, so that the inventive System can be implemented in a simple, inexpensive and space-saving manner. The fact that the oil is directed into the multi-plate clutch can also - In contrast to simply dipping the multi-disc clutch into an oil reservoir, for example an oil sump, in which the multi-disc clutch frees itself from the oil very quickly through rotation and throws it away - sufficient oiling of the multi-disc clutch is ensured. A clutch assembly designed in this way can therefore be used particularly advantageously in applications with a small installation space and in particular with a short axial installation length, in particular while ensuring sufficient oiling.

In particular, the oil can be conducted from the oil catch rib directly into the oil channel and / or from the shaft-housing bearing directly into the multi-plate clutch. In this way, oil routes can be reduced.

In one embodiment, the oil channel is formed by a groove in the housing that is closed by the multi-disc clutch. The oil channel can thus be designed in a simple and therefore also inexpensive manner.

The groove can, for example, be cast at the same time as the housing is cast and, for example, remain in the raw state. The groove can thus be formed in the housing in a particularly simple manner. The later realization of the groove, for example by milling, is also conceivable. The groove in the housing can then be closed to form a channel by inserting the multi-disc clutch, which is required anyway, for example by inserting a housing part of the multi-disc clutch, for example by inserting a clutch piston housing of the multi-disc clutch.

In a special preferred embodiment, the oil channel is then formed by closing the groove in the housing by means of a clutch piston housing of the multi-disc clutch, which can be designed, for example, in the form of a sleeve. The oil channel can thus be designed in a particularly simple and therefore also inexpensive manner.

In a further embodiment, the housing has a bore. In particular, the lower channel opening of the oil channel can open into the bore. The oil can be conducted from the oil catcher rib, for example initially, through the oil channel and, for example, then, through the bore and, for example, finally, through the shaft-housing bearing into the multi-plate clutch. In this way, the oil can be passed on in a simple, inexpensive, space-saving and energy-efficient manner.

The bore can in particular be formed in a section of the housing which serves as a receptacle and / or for fastening a part of the multi-disc clutch and / or the shaft-housing bearing.

In particular, the oil can be guided directly from the oil channel into the bore. In this way, oil routes can be kept short.

In a further preferred embodiment, an oil guide space is formed between the housing and the shaft-housing-bearing. The bore can open into the oil guide chamber in particular. The oil can be guided in particular from the oil catch rib, for example initially, through the oil channel and, for example then, through the bore and, for example then, through the oil guide chamber and, for example, finally, through the shaft-housing-bearing into the multi-plate clutch. In this way, the oil can be passed on in a simple, inexpensive, space-saving and energy-efficient manner.

In particular, the oil can be guided from the bore directly into the oil guide space and / or from the oil guide space directly into the shaft-housing-bearing. In this way, oil routes can be kept short.

The oil guide space can, for example, also be partially delimited by the shaft.

In a further embodiment, the shaft is designed as a hollow shaft. In particular, an end section of the (hollow) shaft supported by the shaft-housing-bearing can be partially or completely closed or closable by a component inserted therein, in particular in the form of a pot shell. The component inserted into the (hollow) shaft can partially limit the oil guide space. In this way, the flow of oil from the oil guide chamber into the hollow shaft designed as a hollow shaft can be limited.

The component inserted into the (hollow) shaft can be designed, for example, in the form of a pot shell with or without a bore.

By designing the component used, for example the cup shell, without a bore, the (hollow) shaft can thereby be completely closed or closable. In this way, oil can be prevented from flowing out of the oil guide chamber into the shaft designed as a hollow shaft.

By designing the component used, for example the cup shell, with a bore, the (hollow) shaft can thereby only be partially closed or closable. In this way, part of the oil can flow out of the oil guide chamber into the (hollow) shaft. However, this enables part of the oil to pass through the (hollow) shaft to another component of the clutch assembly and / or of the vehicle and / or the machine, for example to a further shaft bearing, for example a further shaft-housing bearing, for the rotatable mounting of the shaft, possibly with respect to the housing, for example at another end section of the (hollow) shaft, to direct. Thus, the other component of the clutch assembly and / or of the vehicle and / or of the machine, for example the further shaft bearing, for example the further shaft-housing bearing, can also be lubricated and / or cooled by the oil. A further function can then also be fulfilled by the coupling assembly.

In a further embodiment, the shaft-housing-bearing is a tapered roller bearing. In contrast to other bearings, such as deep groove ball bearings, tapered roller bearings can in particular have a conveying effect. In this way, the oil can advantageously be pumped through a passive component in an energy-saving manner. In particular, the tapered roller bearing can have tapered rollers, the diameter of which increases in the direction of the oil flow to be achieved. In this way, the delivery effect can be set in the desired direction of oil flow.

To the extent that the clutch assembly and / or the vehicle and / or the machine comprises or has a further shaft bearing, for example a further shaft-housing bearing, the further shaft bearing, for example the further shaft-housing bearing, can in particular also , be designed as a tapered roller bearing. In particular, the diameter of the tapered rollers of the tapered roller bearing can increase in the direction of the oil flow to be achieved in order to set the conveying effect in a targeted manner in the desired oil flow direction.

In a further embodiment, an oil collecting tab for collecting oil from the oil collecting rib is formed on the upper duct opening of the oil duct. So oil flowing and / or dripping down from the oil catcher rib can be better collected and / or caught and in this way the oil supply into the oil channel is improved and thus the lubrication of the multi-disc clutch and the shaft-housing-bearing or the shaft-housing-bearing is improved to be further improved.

The oil collecting tab can in particular be formed on the coupling side on the upper channel opening of the oil channel. A funnel effect can thus be achieved through the oil collecting flap.

In a special embodiment, the oil collecting tab is made in one piece with a housing part of the multi-plate clutch. In particular, the oil collecting tab can be made in one piece with the clutch piston housing of the multi-plate clutch, which can be designed, for example, in the form of a sleeve. By designing the oil collecting tab as a housing part of the multi-disc clutch, in particular as a clutch piston housing of the multi-disc clutch, several functions can be fulfilled by one component and fastening elements can also be saved. In this way, the coupling assembly can be implemented in an even simpler, more cost-effective, space-saving and energy-efficient manner.

In a further embodiment, the multi-disc clutch has an inner disc carrier and an outer disc carrier, the inner disc carrier being non-rotatably connected to the shaft and the outer disc carrier non-rotatably connected to a gear, in particular a drive gear, or the inner disc carrier being non-rotatably connected to a gear, in particular drive gear, and the outer disc carrier is rotatably connected to the shaft.

The gear wheel, in particular the drive gear wheel, can in particular be connected or connectable to the motor, in particular to the internal combustion engine, in a rotationally effective manner.

The gear, in particular the drive gear, can be rotatably mounted on the shaft, for example, by a gear-shaft bearing.

The gearwheel, in particular the drive gearwheel, can in particular be a clutch drive gearwheel and / or can be driven by a further drive gearwheel which can be driven by the internal combustion engine.

The drive gear that can be driven by the internal combustion engine can have a toothing for driving the clutch drive gear. In addition, the drive gear, which can be driven by the internal combustion engine, can optionally have a toothing for driving a first electrical machine, in particular that can be operated as a generator.

The shaft can in particular have a gear wheel, for example for driving a differential axle or a differential drive gear.

In the case of an internal combustion engine drive, the internal combustion engine can be connected to the transmission, in particular a differential transmission, in a non-positive manner through the multi-plate clutch.

In addition, the shaft can optionally be connected non-rotatably to a drive gear that can be driven by a second, in particular motorized, electric machine.

Due to the drive gear, which is arranged on the shaft in a rotationally fixed manner and can be driven by an electric motor, and due to the gearwheel (in particular a pinion) formed in a rotationally fixed manner on the shaft, the second electric machine can be permanently connected to the transmission, in particular a differential gear.

In the case of an electric motor drive by the second electric machine, the internal combustion engine can be decoupled from the transmission, in particular a differential gear, and / or the second electric machine, by opening the multi-plate clutch. The multi-disc clutch can therefore in particular be designed as a separating clutch.

The clutch assembly can be designed in particular for a vehicle and / or for an agricultural, forestry, gardening, construction and / or machine tool.

In particular, the clutch assembly for a vehicle with a hybrid transmission, in particular with an internal combustion engine and with at least one electric machine, for example with at least two electric machines, can be designed, in particular for a motor vehicle.

The disadvantages mentioned at the beginning are therefore avoided and corresponding advantages are achieved.

• 1 in einer schematischen Darstellung eine Ausführungsform einer erfindungsgemäßen Kupplungsbaugruppe mit einem Gehäuse mit einer Ölfangrippe, einer einen Ölkanal zumindest teilweise bildenden Nut und einer Bohrung sowie mit einem die Nut zu einem Ölkanal teilweise verschließenden Kupplungskolbengehäuse in einem Querschnitt;
• 2 in einer schematischen Darstellung eine perspektivische Ansicht des Gehäuses bzw. einer entsprechenden Gehäuse-Halbschale der in 1 gezeigten Ausführungsform;
• 3 in einer schematischen Darstellung eine weitere Ausführungsform einer erfindungsgemäßen Kupplungsbaugruppe mit einem Gehäuse mit einer Ölfangrippe, einer einen Ölkanal zumindest teilweise bildenden Nut und einer Bohrung sowie und mit einem die Nut zu einem Ölkanal teilweise verschließenden Kupplungskolbengehäuse sowie mit einer Ölsammellasche in einem Querschnitt; und
• 4 in einer schematischen Darstellung eine perspektivische Ansicht des Gehäuses bzw. einer entsprechenden Gehäuse-Halbschale der in 3 gezeigten Ausführungsform.

There are now a multitude of possibilities for designing and developing the clutch assembly according to the invention in an advantageous manner. For this, reference may first be made to the claims subordinate to claim 1. Some preferred configurations are explained in more detail below with reference to the drawing and the associated description. In the drawing shows:

• 1 in a schematic representation an embodiment of a clutch assembly according to the invention with a housing with an oil trap rib, a groove at least partially forming an oil channel and a bore and with a clutch piston housing partially closing the groove to an oil channel in a cross section;
• 2 in a schematic representation a perspective view of the housing or a corresponding housing half-shell of the FIG 1 embodiment shown;
• 3 in a schematic representation a further embodiment of a clutch assembly according to the invention with a housing with an oil trap rib, a groove at least partially forming an oil channel and a bore and with a clutch piston housing partially closing the groove to an oil channel and with an oil collecting tab in a cross section; and
• 4th in a schematic representation a perspective view of the housing or a corresponding housing half-shell of the FIG 3 embodiment shown.

In the 1 and 2 as well as in the 3 and 4th shows two different embodiments of a clutch assembly according to the invention for a vehicle not shown in detail and / or for a machine not shown in detail.

The figures show that the clutch assemblies each have a multi-plate clutch 10 for the frictional connection of an engine, in particular an internal combustion engine, with a gear, in particular with a differential gear, and a housing 20th , a wave 30th and a shaft-housing-bearing 40 for rotating the shaft 30th regarding the housing 20th include or have.

Between the multi-disc clutch 10 and the case 20th is an oil channel 22nd with an upper channel opening 22a and with a lower channel opening 22b educated. Above the upper duct opening 22a of the oil duct 22nd has the housing 20th an oil trap 21st for catching oil 1 , in particular spray oil. The oil channel 22nd is through a groove 22c in the case 20th formed, which by a sleeve-shaped clutch piston housing 11 the multi-disc clutch 10 is at least partially, in particular circumferentially closed or is closed. In particular, the upper channel opening is located in the corresponding arrangement 22a - viewed in the vertical direction - above the lower duct opening 22b so that then the duct opening 22a as the "upper duct opening" and the duct opening 22b can be referred to as “lower channel opening” and therefore the oil in particular from the upper channel opening 22a towards the lower duct opening 22b can flow or flow away.

Furthermore, the housing 20th a hole 23 in which the lower duct opening 22b of the oil duct 22nd flows out. The hole 23 is in a section of the housing 20th designed, which as a receptacle and / or for fastening part of the multi-disc clutch 10 and the shaft-housing-bearing 40 serves. Between the housing 20th and the shaft-housing-bearing 40 is also an oil duct 24 formed in which the bore 23 flows out.

The teardrop-shaped symbols and arrows in 1 and 3 are meant to illustrate that oil 1 , especially splash oil, on the oil catcher rib 21st and from the oil fin 21st in the oil channel 22nd and through the hole 23 in the oil room 24 between the shaft-housing-bearing 40 and the case 20th can flow. That way the oil can 1 from the oil trap 21st especially first in the oil channel 22nd , then through the hole 23 , then through the oil duct 24 and finally through the shaft-housing-bearing 40 into the multi-disc clutch 10 be directed. This can be done from the shaft-housing-bearing 40 leaking oil 1 radially, in particular only, by an inner disk carrier 12th the multi-disc clutch 10 to the discs of the multi-disc clutch 10 , especially in the direction of the outer disk carrier 13 drain off and provide cooling and / or lubrication. In particular, passive lubrication and / or cooling of the multi-plate clutch is therefore required here 10 and / or the shaft-housing-bearing 40 realized.

The 1 and 3 show that the wave 30th in these embodiments is designed as a hollow shaft. There is one through the shaft-housing-bearing 40 supported end section of the (hollow) shaft 30th by a component inserted therein 31 at least partially closed. This can prevent the oil 1 not mainly by the wave 30th expires. Since that in the (hollow) shaft 30th used component 31 is designed in the form of a pot shell with a bore, but can be part of the oil 1 from the oil duct 24 into the (hollow) shaft 30th flow away. This also allows part of the oil 1 through the (hollow) shaft 30th to another component of the clutch assembly and / or of the vehicle and / or the machine, for example to another shaft-housing-bearing 40 ' for rotating the shaft 30th regarding the housing 20th at another end section of the (hollow) shaft 30th to direct. The other component of the clutch assembly and / or of the vehicle and / or of the machine, for example the further shaft-housing bearing, can also be used 40 ' through the oil 1 lubricated and / or cooled.

The 1 and 3 illustrate that in these embodiments both the shaft-housing-bearing 40 as well as the further shaft-housing-bearing 40 ' is designed as a tapered roller bearing. In contrast to other bearings, such as deep groove ball bearings, tapered roller bearings can in particular have a conveying effect. So can advantageously the oil 1 promoted in an energy-saving way. The tapered roller bearings 40/40 ' can in particular have tapered rollers, the diameter of which increases in the direction of the oil flow to be achieved. In this way, the delivery effect can be set in the desired direction of oil flow.

In the 1 and 2 as in 3 and 4th The embodiments shown are designed in particular for a vehicle with a hybrid transmission with an internal combustion engine (not shown) and with two electric machines (not shown). The multi-disc clutch 10 one rotatably with the shaft 30th connected inner disc carrier 12th and one non-rotatably with a clutch drive gear 50 connected outer disc carrier 13 on. The clutch drive gear 50 is thereby through a gear-shaft-bearing 60 on the wave 30th rotatably mounted and by a drive gear that can be driven by the internal combustion engine 70 drivable. The internal combustion engine driven drive gear 70 has a toothing 71 to drive the clutch drive gear 50 and another toothing 72 to drive a first, in particular a generator, electric machine. The wave 30th has a transmission gear 80 on, for example to drive a differential axle or a differential drive gear. In the case of an internal combustion engine drive, the multi-plate clutch 10 the internal combustion engine can be positively connected to the transmission, in particular a differential transmission. In addition, the wave points 30th a drive gear that can be driven by an electric motor by the second, in particular motorized, electric machine 90 on. Because it rotates with the shaft 30th connected electric motor-driven drive gear 90 and because of that it rotates with the shaft 30th connected transmission gear 80 (Pinion) the second electric machine is constantly connected to the transmission, in particular a differential transmission, in a non-positive manner. In the case of an electric motor drive by the second electric machine, opening the multi-plate clutch 10 the internal combustion engine can be decoupled from the transmission, in particular the differential transmission. The multi-disc clutch 10 can therefore be designed in particular as a disconnect clutch in these embodiments.

In the 3 and 4th The embodiment shown essentially differs from that in FIG 1 and 2 embodiment shown that in addition to the upper channel opening 22a of the oil duct 22nd an oil collection tab or a sealing tab 11 * for collecting oil from the oil catcher 21st is trained. The oil collection tab 11 * is in particular on the coupling side at the upper duct opening 22a of the oil duct 22nd formed or extends from the upper channel opening 22a starting in the radial direction. So can a funnel effect through the oil collecting flap 11 * can be achieved and from the oil fin 21st Oil flowing down and / or dripping 1 can be better collected and / or caught and in this way the oil supply into the oil channel 22nd and thus the oiling of the multi-disc clutch 10 and the shaft-housing-bearing 40 , 40 ' can be further improved. At the in 3 and 4th The embodiment shown is the oil collecting tab 11 * in one piece with the sleeve-shaped clutch piston housing 11 the multi-disc clutch 10 executed.

List of reference symbols

1

oil

10

Multi-disc clutch

11

Clutch piston housing of the multi-plate clutch

11 *

Oil collecting tab

12

Inner plate carrier of the multi-plate clutch

13

Outer plate carrier of the multi-plate clutch

20th

casing

21st

Oil catcher

22nd

Oil channel

22a

upper channel opening of the oil channel

22b

lower channel opening of the oil channel

22c

Groove

23

drilling

24

Oil duct

30th

Shaft, especially a hollow shaft

31

used component, in particular pot shell

40

Shaft-housing-bearings, especially tapered roller bearings

40 '

another shaft bearing, in particular another shaft-housing bearing

50

Clutch drive gear

60

Gear-shaft bearing for the rotatable mounting of the clutch drive gear on the shaft

70

Drive gear driven by an internal combustion engine

71

Toothing of the internal combustion engine-driven drive gear for driving the clutch drive gear

72

Toothing of the internal combustion engine driven output gear for driving a first, in particular a generator, electric machine

80

Gear wheel, especially for driving a differential axle

90

by a second, in particular motorized, electric machine driven by an electric motor drive gear

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 2574826 A1 [0003]

Claims (10)

Clutch assembly for a vehicle and / or for a machine with a multi-plate clutch (10) for the frictional connection of an engine, in particular an internal combustion engine, to a gear, in particular with a differential gear, the clutch sub-assembly and / or the gear furthermore having a housing (20), has a shaft (30) and a shaft-housing-bearing (40) for the rotatable mounting of the shaft (30) with respect to the housing (20), characterized in that between the multi-disc clutch (10) and the housing (20) an oil channel ( 22) is formed with an upper channel opening (22a), the housing (20) having an oil catching rib (21) for catching oil (1), in particular splash oil, above the upper channel opening (22a) of the oil channel (22), and wherein Oil (1) can be guided from the oil catcher rib (21) into the oil channel (22) and through the shaft-housing-bearing (40) into the multi-plate clutch (10). Clutch assembly according to Claim 1 , characterized in that the oil channel (22) is correspondingly formed by a groove (22c) in the housing (20) which is at least partially closed by the multi-plate clutch (10). Clutch assembly according to Claim 2 , characterized in that the oil channel (22) in the housing (20) is at least partially closed by a clutch piston housing (11) of the multi-plate clutch (10). Clutch assembly according to one of the preceding claims, characterized in that the housing (20) has a bore (23) and the oil channel (22) has a lower channel opening (22b), the lower channel opening (22b) of the oil channel (22) in the Bore (23) opens, whereby oil (1) can be directed from the oil catcher rib (21) through the oil channel (22), through the bore (23) and through the shaft-housing-bearing (40) into the multi-plate clutch (10). Clutch assembly according to one of the preceding claims, characterized in that an oil guide chamber (24) is formed between the housing (20) and the shaft-housing bearing (40), the bore (23) opening into the oil guide chamber (24), wherein Oil (1) can be guided from the oil catcher rib (21) through the oil channel (22), through the bore (23), through the oil guide space (24) and through the shaft-housing-bearing (40) into the multi-disc clutch (10). Clutch assembly according to one of the preceding claims, characterized in that the shaft-housing bearing (40) is designed as a tapered roller bearing. Coupling assembly according to one of the preceding claims, characterized in that the shaft (30) is designed as a hollow shaft, an end section of the hollow shaft (30) supported by the shaft-housing-bearing (40) being supported by a component (31) inserted therein, in particular in the form of a pot shell, is partially or completely closed or closable. Coupling assembly according to one of the preceding claims, characterized in that an oil collecting tab (11 *) for collecting oil from the oil collecting rib (21) is formed on the upper duct opening (22a) of the oil duct (22), in particular on the coupling side. Clutch assembly according to one of the preceding claims, characterized in that the oil collecting tab (11 *) is designed in one piece with a housing part (11) of the multi-plate clutch (10), in particular in one piece with the clutch piston housing (11) of the multi-plate clutch (10). Clutch assembly according to one of the preceding claims, characterized in that the multi-disc clutch (10) has an inner disc carrier (12) and an outer disc carrier (13), the inner disc carrier (12) in a rotationally fixed manner with the shaft (30) and the outer disc carrier (13) in a rotationally fixed manner a gearwheel (50), in particular a drive gearwheel (50), or wherein the inner disc carrier is non-rotatably connected to a gear, in particular a drive gear, and the outer disc carrier is non-rotatably connected to the shaft.

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