Transmission device for a drive train, a motor vehicle and method

Abstract

Transmission device (1) for a motor vehicle, comprising a coupling device (2) configured to selectively couple an input shaft (3) with an output shaft (4) and a parking lock device (5) configured separately from the coupling device (2) to lock the transmission device (1), comprising a common actuating device (10) for the parking lock device (5) and the coupling device (2), wherein the common actuating device (10) is configured to close the coupling device (2) in a first actuating state and to close both the coupling device (2) and the parking lock device (5) in a second actuating state, characterized in that a first preloading device (24) configured to exert a preload force on the locking element (6) of the parking lock device (5) and a second preloading device (23) configured toto exert a preload force on the coupling element (9) of the coupling device (2), wherein the first and / or the second preload device (23, 24) is designed as a normally-closed or normally-open preload device.

Description

[0001] The invention relates to a transmission device for a motor vehicle, comprising a coupling device configured to selectively couple an input shaft with an output shaft and a parking lock device designed separately from the coupling device to lock the transmission device.

[0002] Transmission devices for motor vehicles, comprising a parking lock device and a coupling device. The coupling device, which can also be referred to as a DCU (disconnect unit), is used, for example, to couple an input shaft to an output shaft. The coupling device can be used in various ways, such as to disconnect or connect an electric motor to the rest of the drivetrain, or more generally, to disconnect parts of the drivetrain when they are not in use, thereby reducing the number of transmission components being driven and thus increasing efficiency. The parking lock device is known to be used to lock the transmission device, thus preventing unintentional movement of the motor vehicle, and in particular, preventing it from rolling away unintentionally.

[0003] In DE 10 2015 224 285 A1, a switching device for a transmission with at least two actuating devices arranged on a switching shaft for actuating two switching elements is presented.

[0004] DE 20 2005 019 438 U1 describes a drive unit for a motor vehicle which has at least 2 gear stages and the transmission shaft is designed as a hollow shaft, wherein the wheel drive shafts are passed through the transmission drive shaft.

[0005] In DE 10 2021 116 297 A1, a drive motor for propelling a motor vehicle is concerned. The motor vehicle includes a parking lock device which can be actuated by an actuator.

[0006] WO 2020 / 001 778 A1 describes an actuator for operating a clutch and a parking lock.

[0007] German patent application DE 10 2020 210 667 A1 describes an automated transmission arrangement which includes, among other things, a parking lock device. Furthermore, a lockable freewheel is disclosed which can be actuated via an actuator arrangement.

[0008] DE 10 2021 211 412 B3 describes a transmission device for a motor vehicle which has a coupling device designed to lock a parking lock in a third switching position.

[0009] Typically, the coupling device and the parking lock device are designed as separate components within the transmission. This necessitates independent actuation mechanisms for both the parking lock and the coupling device, which must be controlled separately. While this allows the coupling device and the parking lock device to be operated completely independently, their operating states are often related, making separate control unnecessary. Generally, depending on the specific design of the transmission, the parking lock device is engaged when the coupling device must also be closed, for example, to connect the part to which the parking lock engages with the rest of the drivetrain.Due to the separate implementation of the coupling device and the parking lock device, particularly with regard to their operation, various components must be duplicated, especially the actuator performing the operation, as well as the control device intended for the control, or the control device must separately control the different actuating devices for assuming the desired states.

[0010] The invention is based on the objective of providing an improved transmission device for a motor vehicle.

[0011] The problem is solved by a transmission device with the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

[0012] As described, the invention relates to a transmission device for a motor vehicle, comprising a coupling device and a parking lock device, which are fundamentally separate from each other. This means that the coupling device and the parking lock device are distinct components, specifically featuring different actuating elements. In other words, the coupling device and the parking lock device are not integrated into one and the same unit, but rather represent separate assemblies or modules, which are also spatially separated from each other within the transmission device.

[0013] The invention is based on the finding that a common actuating device is provided for the parking lock and the coupling device, wherein the common actuating device is configured to close the coupling device in a first actuating state and to close both the coupling device and the parking lock in a second actuating state. Advantageously, the common actuating device can thus be used to actuate both the parking lock and the coupling device. This eliminates the requirement for separate devices, namely that the parking lock and the coupling device must each have their own independent actuating device. Instead, the common actuating device can be used to actuate both the parking lock and the coupling device.Since there is usually a connection between the operating states of the parking lock device and the coupling device, in particular the parking lock device can only be operated effectively if the coupling device has been operated previously or simultaneously, the common operating device can exploit this synergy or this chaining of operating states.

[0014] The actuating device can, for example, have three states. In a neutral state, both the coupling device is open (i.e., the connection made possible by the coupling device is disconnected) and the parking lock device is engaged. From the neutral state, the first actuating state can be transitioned to. For this, the common actuating device actuates the coupling device. Thus, in the first actuating state, the coupling device is actuated (i.e., closed), while the parking lock device is engaged. In this state, torque transmission is possible via the coupling device, for example, from the input shaft to the output shaft.

[0015] In the second actuation state, starting from the first actuation state, the parking lock mechanism is closed (i.e., engaged) in addition to the closed coupling device. Advantageously, both actuation tasks can thus be performed using a single actuation device, since actuating the parking lock mechanism already requires the first actuation state as its initial state, making completely independent actuation of the parking lock mechanism unnecessary. Therefore, the single actuation device can be used. By eliminating the need for independent actuation, separate actuators and separate control systems for separately implemented actuation devices can be avoided.

[0016] Specifically, this application provides that the coupling element of the coupling device, for example a claw, is different from the locking element of the parking lock device, for example a pawl; that is, the locking element and the coupling element are different transmission elements. The common actuating device can actuate both transmission elements, in particular the coupling element and the locking element. The described transmission device is thus distinguished from other transmission devices in which the coupling device and the parking lock device are integrated into the same device, in particular where the individual states are produced via the same transmission element, for example an axially movable claw that actuates the coupling device in a first switching position and the parking lock in a second switching position.

[0017] In a further development of the transmission device, the parking lock mechanism can be configured to include a locking element, in particular a pawl, and a parking lock wheel. The common actuating device is designed to move the locking element into a locking contour of the parking lock wheel in the second actuation state. The actuating device can, for example, include an actuating element that acts on the locking element, for instance, engaging the pawl in the locking contour. In the engaged state, where the locking element engages in the locking contour of the parking lock wheel, the parking lock mechanism blocks rotation of the parking lock wheel by means of the positive locking between the locking element and the parking lock wheel. Therefore, when the parking lock mechanism is engaged, no further rotation of the parking lock wheel can occur in the known manner.Since the parking lock wheel is connected to the transmission device, for example, it is arranged on a shaft of the transmission device, the transmission device is locked by the parking lock device.

[0018] Furthermore, the coupling device can include a coupling element, for example, an axially movable claw that can be actuated, for example, by means of a sliding sleeve. The common actuating device can be configured to move or hold the coupling element, in particular a claw, in a coupled state in both the first and second actuating states. The common actuating device can include an actuating element that can move the coupling element. For example, the actuating device includes a common actuator that can move the actuating element such that, in the first actuating state, the coupling element engages positively, thus closing the coupling device.

[0019] The actuating element for the parking lock mechanism and the actuating element for the coupling mechanism described above can be one and the same actuating element. It is also possible that the actuating mechanism provides separate actuating elements for the parking lock mechanism and for the coupling mechanism, which are, however, actuated by the common actuating mechanism. The described coupling mechanism can, in particular, have exactly two states: the open state and the closed state. The coupling element of the coupling mechanism can thus only be moved into one of the two states, and no further states, such as locking states of the coupling element known from devices in which the coupling mechanism and parking lock mechanism are integrated, are provided.

[0020] As previously described, the common actuating device is designed to establish the first actuation state and the second actuation state. In particular, the common actuating device can be designed to assume the first actuation state from a neutral state and the second actuation state from the first actuation state. For this purpose, the common actuating device can provide various positions for actuating elements, or the actuating elements can be moved into the corresponding positions to actuate the parking lock device and the coupling device.

[0021] As described, the coupling device is closed in the first actuation state. Starting from the neutral state, in which the parking lock and coupling device are open, only the coupling device is closed in the first actuation state, so that the parking lock is open in this state. From the first actuation state, one can then optionally transition to the neutral state or to the second actuation state. When transitioning to the neutral state from the first actuation state, the coupling device is opened, so that both the parking lock and the coupling device are open again. From the first actuation state, one can transition to the second actuation state, in which, in addition to the previously closed coupling device, the parking lock is also closed, i.e., engaged.

[0022] Accordingly, when transitioning from the second actuation state to the neutral state, the first actuation state and then the neutral state can be reached first. If the common actuation device has exactly one actuation element for actuating the parking lock device and the coupling device, the individual actuation positions of the actuation element can be sequential in the direction of actuation. If the actuation device has two actuation elements, each of the two actuation elements can have exactly two switching positions, corresponding to the engaged or disengaged state, or the coupled or uncoupled state.

[0023] In principle, the method by which the common actuating device actuates the parking lock and the coupling device is freely selectable, for example, depending on the specific design of the transmission device. According to one embodiment, the common actuating device can be configured to assume the first and second actuating states electromechanically, in particular by means of at least one actuating element that is coupled to a coupling element of the coupling device and a locking element of the parking lock. In this embodiment, the common actuating device is thus configured to move the actuating element that interacts with the coupling element and the locking element by means of electromechanical actuation, so that the individual actuating states can be assumed as described above.The common actuating device can, for example, include an actuator, which is designed, for instance, as an electric motor. The movement generated by the actuator can be transmitted to the actuating element via a lever or a rack and pinion, so that, in particular, a linear movement is generated from the rotary movement, which allows the actuating element to be moved into the individual actuation states or the actuation positions corresponding to the actuation states.

[0024] The common actuating device may further include a guide device, in particular a cam, wherein two actuating elements with different guide sections of the guide device are coupled and the common actuating device is designed to assume the actuating states by rotating the guide device. The guide device, which may also be referred to as a cam or "swashplate" or be designed as such, is actuated or moved by the common actuating device.

[0025] The actuating device can, for example, include an actuator designed as an electric motor, which can rotate the guide device. The two actuating elements, which are coupled to the guide sections (e.g., cam tracks) of the guide device, are thus adjusted by the rotational movement of the guide device. The guide sections are different for the actuating elements, so that when the actuating device is rotated, the first actuating element is initially moved into one actuating position, and with further rotation of the guide device, the second actuating element is also moved into the second actuating position.By appropriately assigning the actuating elements to the devices to be actuated by the actuating device, in particular the coupling device and the parking lock device, the actuating sequence described above can be realized, namely, first closing the coupling device in the first actuating state and additionally closing the parking lock device in the second actuating state. The guide device, for example the cam disc, has different plateaus or levels in the guide sections for this purpose.

[0026] The common actuating device can also include a magnetic device, wherein at least one spring-mounted actuating element can be moved into the first and / or second actuating state by actuating at least one magnetic element of the magnetic device. In other words, the actuating element can be spring-mounted by means of a spring device. The spring device can bias the actuating element into the actuating state, in particular into the second actuating state. Here, the first actuating state and the second actuating state can be sequential, starting from the neutral state in the actuating direction of the actuating element. If a magnetic field is generated by the magnetic element, in particular by two magnetic elements, of the magnetic device, the actuating element is moved into the neutral state under bias of the spring device.If the magnetic mechanism is released, the spring bearing causes the actuating element to move into the second actuation state. The magnetic mechanism can have two magnetic elements, so that when only one magnetic element is actuated, the first actuation state is reached, and when both magnetic elements are actuated, the neutral state is reached. A reverse arrangement, in which the spring preload is in the direction of the neutral position, is also possible, so that when the magnetic elements are released, the neutral state is reached.

[0027] As described, it is generally possible for the common operating device to have either a single operating element or two separate operating elements. Depending on the specific design of the operating device and / or the devices to be operated, it may be advantageous to operate both devices via a single operating element, particularly if the operating positions are located one after the other in the direction of operation. Likewise, it may be advantageous to provide the common operating device with two separate operating elements, each intended for operating the individual devices; that is, one operating element for the parking lock device and a separate, additional operating element for the coupling device.

[0028] The common actuating device can include a hydraulic actuating device, in particular a first pressure chamber that can be filled by means of a first valve device and a second pressure chamber that can be filled by means of a second valve device. According to this configuration, the actuating element is actuated hydraulically, i.e., by generating pressure in a working fluid in the individual pressure chambers. The pressure chambers are coupled to the actuating elements, so that filling the pressure chambers via the corresponding valve devices causes a displacement of the respective actuating elements. For example, the first pressure chamber can be coupled to a first actuating element, such as a piston. When the first pressure chamber is filled, the first actuating element is moved into a first actuating position.

[0029] For example, the first pressure chamber can be assigned to the coupling device. When the first pressure chamber is filled, the first coupling device closes. Similarly, the second pressure chamber can be assigned to the parking lock device. When the second pressure chamber is filled, a second actuating element coupled to the second pressure chamber is moved into the actuating position, and the parking lock device closes. A coupling between the valve devices can be provided. In particular, the first pressure chamber is filled to achieve the first actuating state, and then the second pressure chamber is filled to achieve the second actuating state. The devices open accordingly by a pressure drop in the pressure chambers. The pressure chambers, and especially the actuating elements, can be spring-loaded.

[0030] The transmission device is further developed by a first preloading device and a second preloading device. The first preloading device is configured to exert a preload force on the locking element of the parking lock device, while the second preloading device is configured to exert a preload force on the coupling element of the coupling device. The first and / or the second preloading device is configured as a normally-closed or normally-open preloading device, respectively. In other words, it is generally provided that the preloading devices preload the respective actuating element into the actuated position or into the open position. Finally, the actuating device is configured to assume the opposite state from the preloaded state, for example, to transition from a disengaged state to a retracted state or vice versa.

[0031] In addition to the transmission device, the invention relates to a drive train comprising such a transmission device. The invention further relates to a motor vehicle comprising such a drive train and / or a transmission device as previously described. The invention also relates to a method for operating a transmission device for a motor vehicle, comprising a coupling device configured to selectively couple an input shaft with an output shaft, and a separate parking lock device configured to lock the transmission device, wherein, by means of a common actuating device, the coupling device is closed in a first actuating state, and in a second actuating state, both the coupling device and the parking lock device are closed.

[0032] All the advantages, details and features described in relation to the transmission device are fully transferable to the drive train, the motor vehicle and the process.

[0033] The invention is explained below with reference to exemplary embodiments and the figures. The figures are schematic representations and show: Fig. 1 a transmission device according to a first embodiment in a neutral state; Fig. 2 the gearbox of Fig. 1 in a first actuation state; Fig. 3 the gearbox of Fig. 1, Fig. 2 in a second operating state; Fig. 4 a transmission device according to a second embodiment in a neutral state; Fig. 5 the gearbox of Fig. 4 in a first actuation state; Fig. 6 the gearbox of Fig. 4, Fig. 5 in a second operating state; Fig. 7 a gear device according to a third embodiment in a neutral state; Fig. 8 the gearbox of Fig. 7 in a first activation state; Fig. 9 the gearbox of Fig. 7, Fig. 8 in a second operating state; Fig. 10 a section of an actuating device of the transmission device of Fig. 7-9; Fig. 11 a transmission device according to a fourth embodiment in a neutral state; and Fig. 12 the gearbox of Fig. 11 in a second activation state.

[0034] Fig. Figure 1 shows a section of a transmission device 1 for a motor vehicle (not shown in detail). The transmission device 1 has a coupling device 2, which is designed to selectively couple or disconnect two elements of the transmission device 1. The coupling device 2 can, for example, couple an input shaft 3 with an output shaft 4. The transmission device 1 also has a parking lock device 5. The parking lock device 5 is designed to lock the transmission device 1. The parking lock device 5 has a locking element 6, which is designed, for example, as a pawl. The locking element 6 can engage in a locking contour 7 of a parking lock wheel 8. The parking lock wheel 8 is, in turn, coupled to an element of the transmission device 1, for example, a shaft of the transmission device 1. If the parking lock wheel 8 is locked, the transmission device 1 is thus locked.

[0035] The coupling device 2 and the parking lock device 5 are evidently designed as spatially separate components of the transmission device 1. In particular, the function of the parking lock device 5 and the coupling device 2 is not integrated into a single unit. Specifically, the locking element 6 of the parking lock device 5 differs from a coupling element 9 of the coupling device 2. The coupling element 9 is moved into different states by the coupling device 2 to establish and disengage the coupling. The coupling element 9 is specifically designed as a claw element.

[0036] In the Fig. In the embodiment of the transmission device 1 shown in Figure 1, the transmission device 1 has a common actuating device 10, which is designed to actuate the coupling device 2 and the parking lock device 5. In the embodiment shown in Figure 1, the transmission device 1 has a common actuating device 10, which is designed to actuate the coupling device 2 and the parking lock device 5. Fig. In the situation shown in Figure 1, the neutral state exists, in which the coupling device 2 is open and the parking lock device 5 is deployed. In the illustrated embodiment, the common actuating device 10 has a common actuating element 11, which can be moved by an actuator (not shown in detail). The actuator can, for example, be an electric motor and transmit the movement to the common actuating element 11, for example via a lever, as shown, or alternatively via a rack and pinion or a spindle drive, or otherwise.

[0037] Starting from the in Fig. In the neutral position or neutral state shown in Figure 1, the actuating element 11 can be moved in one direction of actuation by means of the common actuating device 10. This is done first in the position shown in Figure 1. Fig. In the first actuation state shown in Figure 2, the coupling device 2 moves. The actuating element 11 moves the coupling element 9, thus establishing the engagement of the claw elements shown as an example. Starting from the state shown in Figure 2, the coupling device 2 moves. Fig. The first actuation state shown in 2 can be returned to the neutral state by correspondingly reversing the movement of the actuating element 11, which is shown in Fig. As shown in 1, it can be achieved. Furthermore, starting from the point shown in Fig. 2 first actuation state of the depicted in Fig. The second actuation state shown in Figure 3 is achieved by moving the actuating element 11 further in the actuation direction by the common actuating device 10, so that the parking lock device 5 can also be engaged. For this purpose, the actuating element 11 can act, at least indirectly, on the locking element 6, causing it to engage in the locking contour 7, as described previously. From the Fig. The second actuation state shown in 3 can be found in the Fig. 2 the first actuation state shown and from this, as described, transition to the neutral state.

[0038] In Fig. Figures 4-6 show a second embodiment of the gear device 1. The same reference numerals are therefore used for comparable components. Instead of the electromechanical actuation, which is described in relation to Fig. As described in Figures 1-3, the actuating element 11 is electromagnetically actuated in this embodiment. The actuating element 11 is, in particular, mounted by means of a spring device 12 or in the neutral state described in Figures 1-3. Fig. As shown in Figure 4, the actuator is pre-tensioned in the direction of actuation. The common actuating device 10 has a magnetic device 13, which in this embodiment comprises a first magnetic element 14 and a second magnetic element 15. In the illustration in Fig. 4, in which the neutral state exists, the two magnetic elements 14, 15 are active and hold the actuating element 11 under preload of the spring device 12 in the neutral state.

[0039] To get from the in Fig. 4 neutral state shown in the in Fig. To transition to the first actuation state shown in Figure 5, the second magnetic element 15 is deactivated, so that, due to the preload from the spring device 12, the actuating element 11 is displaced in the actuation direction and the coupling device 2 is closed. From the first actuation state in Fig. 5 can enter the second actuation state in Fig. 6 is passed by also deactivating the first magnetic element 14, so that the spring device 12 moves the actuating element 11 further in the actuating direction and thus also engages the parking lock device 5.

[0040] By reversing the described movement, starting from the second actuation state, which is in Fig. 6 is shown, transitioning to the first actuation state, which is in Fig. 5 is shown. For this purpose, the first magnetic element 14 is activated by the magnetic device 13, so that the actuating element is moved and thus the parking lock device 5 is released again, in particular the locking element 6 is moved out of the locking contour 7. Starting from the illustration in Fig. 5, namely the first actuation state, by activating the second magnetic element 15 the spring device 12 can be further pre-tensioned by further movement of the actuating element 11 and thus the neutral state can be reached. Fig. 4. The magnetic elements 14, 15 can also be assigned to separate actuating elements 11, 11'.

[0041] Fig. Figures 7-9 show a transmission device 1 according to a third embodiment. The common actuating device 10 has an actuator, which is not shown in detail and may, for example, be an electric motor. The common actuating device 10 is designed to move a guide device 16, for example, a guide disc. In the embodiment shown, the common actuating device 10 has two actuating elements 11, 11', wherein, purely by way of example, the actuating element 11 is coupled to the coupling device 2 and the actuating element 11' is coupled to the parking lock device 5. The actuating elements 11, 11' are arranged in guide sections 17, 18 of the guide device 16 or coupled to the guide device 16 via these. In the embodiment shown, the actuating elements 11, 11' engage in the guide sections 17, 18, which can be understood as cam guides.The guide sections 17 and 18 have different elevation profiles compared to a basic level of the guide device 16; in particular, both guide section 17 and guide section 18 have a first level, for example a neutral level, which is located in . Fig. 7 is shown, and a second level, for example an activity level that is in Fig. 8, Fig. 9 is shown.

[0042] In other words, a rotary movement of the guide device 16 generates a relative movement between the actuating elements 11, 11' and the guide sections 17, 18. Starting from the neutral state, which is described in Fig. As shown in 7, the system transitions to the first actuation state, which is in Fig. Figure 8 is shown. During the movement of the guide device 16, the second actuating element 11' remains at the "neutral level". Unlike the second guide section 18, the first guide section 17, in the corresponding circumferential position, has a raised position at the second level or actuation level. Therefore, the actuating element 11 is displaced in the direction of actuation and, as previously described, closes the coupling device 2.

[0043] Further movement of the guide device 16 leads from the first actuation state to the second actuation state, in which the actuation level is also reached in the second guide section 18. It is evident that by moving the common guide device 16, actuation of the coupling device 2 and the parking lock device 5 can be achieved. The guide device 16 is described in detail in Fig. Figure 10 illustrates this. It follows that during a rotational movement of the guide device 16, the actuating element 11 in the guide section 17, i.e., in the circumferential direction in front of the guide section 18, first reaches the actuation level. In the opposite direction, the parking lock device 5 is deployed first, since the guide section 18 reaches the base level in the circumferential direction against the direction of actuation in front of the guide section 17.

[0044] Fig. 11, Fig. Figure 12 shows a gear device 1 according to a fourth embodiment. In the fourth embodiment in Fig. 11, Fig. 12. Actuation is effected hydraulically by the common actuating device 10. In this embodiment, the common actuating device 10 provides a first pressure chamber 19 and a second pressure chamber 20, which are coupled to the actuating elements 11, 11'. In particular, the actuating elements 11, 11' can be moved like a piston by a working fluid, which can be pressurized and introduced into the pressure chambers 19, 20. For example, the common actuating device 10 is coupled to a pump or provides a separate pump. According to an advantageous embodiment, the common actuating device 10 can use an oil pump provided in the motor vehicle, for example, a lubricating oil pump or a cooling oil pump.

[0045] The hydraulic circuit includes a first valve assembly 21, which allows working fluid to be pumped into the first pressure chamber 19. A second valve assembly 22 is also provided, which allows working fluid to be pumped into the second pressure chamber 20. When the first valve assembly 21 is opened, pressurized working fluid can be pumped into the first pressure chamber 19, causing the actuating element 11 to move in the actuation direction and the coupling device 2 to close. This establishes the first actuation state, in which the coupling device 2 is closed and the parking lock device 5 is engaged. From this first actuation state, the system can transition to the second actuation state, which is described in Fig. Figure 12 shows that the second valve assembly 22 is closed, allowing pressurized working fluids to be pumped into the second pressure chamber 20. This results in the second operating state being reached from the first, in which the parking lock assembly 5 is also closed.

[0046] The individual embodiments show pretensioning devices 23, 24, which can be referred to as "first pretensioning device 23" and "second pretensioning device 24". The arrangement or pretensioning direction of the pretensioning devices 23, 24 can be selected or changed as desired. It is generally shown that the pretensioning devices 23, 24 move the actuating elements 11, 11' or the locking element 6 and the coupling element 9 into the neutral position, i.e., into the extended position or the open position. Each of the pretensioning devices 23, 24 can also be arranged or pretensioned in reverse, so that either the parking lock device 5 and / or the coupling device 2 can be pretensioned into the engaged state or the coupled state.

[0047] Specifically, in the embodiment according to Fig. 11, Fig.12. The coupling device 2 can be pre-tensioned into the closed state by the pre-tensioning device 23. For this purpose, the actuation direction of the actuating element 11 must be reversed so that pressure is applied to the pressure chamber 19, causing the coupling device 2 to open. This would be done to transition to the neutral state, so that the actuating device empties the pressure chamber 19 to assume the first actuation state and the pre-tensioning device 23 closes the coupling device 2.

[0048] The transmission device 1 can specifically be a component of a drive train (not shown in detail), in particular of a motor vehicle. Such a motor vehicle or drive train thus comprises a transmission device 1. The method described herein can be carried out using the transmission device 1. Reference sign 1 Gearbox device 2 Coupling device 3 Input wave 4 Output wave 5 Parking barrier device 6 Locking element 7 Locking contour 8 Parking lock wheel 9 Coupling element 10 shared activity facilities 11, 11' Actuating element 12 Spring assembly 13 Magnetic device 14, 15 Magnetic element 16 Guide system 17, 18 Guided Section 19, 20 printing room 21, 22 Valve assembly 23, 24 Pre-tensioning device

Claims

[1] Transmission device (1) for a motor vehicle, comprising a coupling device (2) which is designed to selectively couple an input shaft (3) to an output shaft (4) and a parking lock device (5) which is designed separately from the coupling device (2) and is designed to lock the transmission device (1), having a common actuating device (10) for the parking lock device (5) and the coupling device (2), wherein the common actuating device (10) is designed to close the coupling device (2) in a first actuating state and to close the coupling device (2) and the parking lock device (5) in a second actuating state, characterized bythat a first pretensioning device (24) which is designed to exert a pretensioning force on the locking element (6) of the parking lock device (5) and a second pretensioning device (23) which is designed to exert a pretensioning force on the coupling element (9) of the coupling device (2), wherein the first and / or the second pretensioning device (23, 24) is designed as a normally-closed or normally-open pretensioning device. [2] Transmission device (1) according to claim 1, characterized by in that the parking lock device (5) has a locking element (6), in particular a pawl, and a parking lock gear (8), wherein the common actuating device (10) is designed to move the locking element (6) into a locking contour (7) of the parking lock gear (8) in the second actuating state. [3] Transmission device (1) according to claim 1 or 2, characterized byin that the coupling device (2) has a coupling element (9) and the common actuating device (10) is designed to move the coupling element (9), in particular a claw, into a coupling state in the first actuating state and the second actuating state. [4] Transmission device (1) according to one of the preceding claims, characterized by that the common actuating device (10) is designed to assume the first actuating state from a neutral state and the second actuating state from the first actuating state. [5] Transmission device (1) according to one of the preceding claims, characterized bythat the common actuating device (10) is designed to assume the first actuating state and the second actuating state electromechanically, in particular by means of at least one actuating element (11, 11') which is coupled to a coupling element of the coupling device (2) and a locking element (6) of the parking lock device (5). [6] Transmission device (1) according to one of the preceding claims, characterized by that the common actuating device (10) has a guide device (16), in particular a link plate, wherein two actuating elements (11, 11') are coupled to different guide sections (17, 18) of the guide device (16) and the common actuating device (10) is designed to assume the actuating states by rotating the guide device (16). [7] Transmission device (1) according to one of the preceding claims, characterized bythat the common actuating device (10) has a magnetic device (13), wherein at least one spring-loaded actuating element (11, 11') can be moved into the first and / or the second actuating state by controlling at least one magnetic element (14, 15) of the magnetic device (13). [8] Transmission device (1) according to one of the preceding claims, characterized by that the common actuating device (10) has a common actuating element (11) or two separate actuating elements (11, 11'). [9] Transmission device (1) according to one of the preceding claims, characterized by that the common actuating device (10) has a hydraulic actuating device (10), in particular a first pressure chamber (19) that can be filled by means of a first valve device (21) and a second pressure chamber (20) that can be filled by means of a second valve device (22). [10] Drive train comprising a transmission device (1) according to one of the preceding claims. [11] Motor vehicle comprising a drive train according to the preceding claim and / or a transmission device (1) according to one of claims 1 to 9. [12] Method for operating a transmission device (1) for a motor vehicle, comprising a coupling device (2) which is designed to selectively couple an input shaft (3) to an output shaft (4) and a parking lock device (5) which is designed separately from the coupling device (2) and is designed to lock the transmission device (1), characterized by that by means of a common actuating device (10) the coupling device (2) is closed in a first actuating state and in a second actuating state the coupling device (2) and the parking lock device (5) are closed.

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