US-20260126085-A1 - TRANSMISSION DEVICE FOR A DRIVE TRAIN OF A MOTOR VEHICLE, IN PARTICULAR OF AN AUTOMOBILE

US20260126085A1US 20260126085 A1US20260126085 A1US 20260126085A1US-20260126085-A1

Abstract

A transmission device includes a multiple-disc coupling having a disc carrier and a disc pack with discs arranged following each other in the axial direction of the multiple-disc coupling, of which two discs are designed as end discs. A first switching element can actuate the disc pack via a first of the end discs in a first actuating direction extending in the axial direction of the multiple-disc coupling. A second switching element, opposite the first switching element in the axial direction of the multiple-disc coupling, can actuate the disc pack, via the second end disc, in a second actuating direction extending in the axial direction of the multiple-disc coupling and is counter to the first actuating direction. The second end disc is supported in the second actuating direction directly on the disc carrier and in the first actuating direction directly on a component.

Inventors

Tobias Schuster
Patrik Szöllösi
Dennis Winter

Assignees

Mercedes-Benz Group AG

Dates

Publication Date: 20260507
Application Date: 20230814
Priority Date: 20220929

Claims (9)

1 - 8 . (canceled)
9 . A transmission device for a drive train of a motor vehicle, the transmission device comprising: a multiple-disc coupling comprising at least one disc carrier and a disc pack with a plurality of discs arranged following each other in an axial direction of the multiple-disc coupling, wherein the plurality of discs include first and second end disks between which remaining discs of the plurality of disks are arranged; a first switching element configured to actuate the disc pack via the first end disc in an actuating direction extending in the axial direction of the multiple-disc coupling; and a second switching element arranged opposite the first switching element in the axial direction of the multiple-disc coupling, wherein the second end disc is supported directly on the at least one disc carrier in a support direction extending in the axial direction of the multiple-disc coupling and counter to the actuating direction and is supported directly on a component of the second switching element in the actuating direction, wherein the plurality of discs of the disc pack each have a first toothing engaging into a corresponding second toothing of the at least one disc carrier so that the plurality of discs of the disc pack are supported on the disc carrier in a circumferential direction of the multiple-disc coupling, wherein the second toothing has at least two teeth set back in the axial direction and forming a respective axial end face, and wherein, on the respective axial end faces, corresponding teeth of the first toothing of the second end disc are directly supported in the support direction.
10 . The transmission device of claim 9 , wherein the component supported directly on the second end disc in the support direction is supported in the actuating direction directly on a securing element fixed at least indirectly to a carrier element of the transmission device in the axial direction of the multiple-disc coupling.
11 . The transmission device of claim 10 , wherein the securing element is a wedge ring having two wedge faces facing away from each other in the axial direction of the multiple-disc coupling, wherein the two wedge faces extend outwards towards each other in a radial direction of the multiple-disc coupling.
12 . The transmission device of claim 9 , wherein the teeth of the first toothing of the second end disc that are supported on the end faces each have a first extension, extending in the circumferential direction of the multiple-disc coupling, which is greater than a respective second extension of further teeth of the first toothing of the second end disc, wherein the second extension extends in the circumferential direction of the multiple-disc coupling.
13 . The transmission device of claim 12 , wherein the teeth of the first toothing of the second end disc that are supported on the end faces are arranged evenly distributed in the circumferential direction of the multiple-disc coupling.
14 . The transmission device of claim 9 , wherein the component includes a third toothing, corresponding to the second toothing, that engages into the second toothing to support the component on the disc carrier in the circumferential direction of the multiple-disc coupling.
15 . The transmission device of claim 9 , wherein the second switching element is a claw switching element and the component is a carrier part of a claw switching element half of the claw switching element.
16 . The transmission device of claim 9 , wherein the first and second switching elements are brake switching elements.

Description

BACKGROUND AND SUMMARY OF THE INVENTION Exemplary embodiments of the invention relate to a transmission device for a drive train of a motor vehicle, in particular of an automobile. A coupling for a dual clutch for an automatic or automated dual-clutch transmission of a motor vehicle is taken as known from DE 10 2007 027 120 B4. Exemplary embodiments of the present invention are directed to a transmission device for a drive train of a motor vehicle, in particular of an automobile, so that a particularly compact construction can be realized. The invention relates to a transmission device for a drive train of a motor vehicle, also simply referred to as a vehicle, which is preferably formed as an automobile, in particular as a passenger car. This means that, in its completely produced state, the motor vehicle has the transmission device. For example, the motor vehicle with the transmission device can be driven, in particular by a drive motor of the motor vehicle. For example, the drive motor may be an internal combustion engine or also an electric engine, meaning that, for example, the motor vehicle is designed as a hybrid vehicle or also as an electric vehicle, in particular as a battery electric vehicle (BEV). The transmission device has a multiple-disc coupling which, for example, is arranged in a housing of the transmission device, also referred to as transmission housing. The multiple-disc coupling has at least one disc carrier and a disc pack which, for example, is carried by the disc carrier and therefore is held on the disc carrier. The disc pack has discs that are arranged following each other in the axial direction of the multiple-disc coupling. In particular, exactly two of the discs of the disc pack are end discs, which are also referred to as first discs. The remaining other discs of the disc pack, in particular all remaining discs of the disc pack, are also referred to as second discs and are arranged between the end discs in the axial direction of the multiple-disc coupling. The transmission device has a first switching element by means of which the disc pack can be actuated via a first of the end discs in a first actuating direction that extends in the axial direction of the multiple-disc coupling. In particular, this is to be understood to mean that the first switching element can exert a first force on the disc pack in the first actuating direction via the first end disc, in order to actuate the disc pack, in particular to compress it or press together it. In order to be able to realize a particularly advantageous function of the transmission device in a particularly space-efficient manner and thus in a particularly compact design, it is provided according to the invention that the transmission device has a second switching element, provided, in particular, in addition to the first switching element, the second switching element lying opposite the first switching element in the axial direction of the multiple-disc coupling. In particular, the first discs and the second discs of the disc pack are arranged between the switching elements in the axial direction of the multiple-disc coupling. By means of the second switching element, the disc pack can be actuated via the second end disc in a second actuating direction, extending in the axial direction of the multiple-disc coupling and counter to the first direction, in particular in such a way that a second force can be exerted on the disc pack by the second switching element in the second actuating direction via the second end disc. This means, for example, that a so-called disengagement impact can be exerted on the disc pack, in order to separate the discs of the multiple-disc coupling from each other, for example, and thus to disengage the clutch disc. In other words, the second force is or brings about the mentioned disengagement impact, meaning that the second force is a disengagement force in order to disengage the multiple-disc coupling, in particular in order to separate the discs of the disc pack from each other. For example, the multiple-disc coupling can be engaged by means of the first force, in particular in that the disc pack is compressed by means of the first force. If the multiple-disc coupling is engaged, the multiple-disc coupling is in a coupled state, for example, in which two elements are connected to each other for conjoint rotation by means of the multiple-disc coupling, for example. If the multiple-disc coupling is disengaged, the multiple-disc coupling is in a decoupled state, for example, in which the multiple-disc coupling allows relative rotation to take place between the elements, in particular around a longitudinal rotational axis. The second end disc is supported directly on the disc carrier in the second actuating direction. In the first actuating direction, the second end disc is supported directly on a component of the second switching element and thus a second switching element. This means that space-efficient se