Transmission for a motor vehicle, and motor vehicle comprising such a transmission
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- BAYERISCHE MOTOREN WERKE AG
- Filing Date
- 2024-05-27
- Publication Date
- 2026-05-06
AI Technical Summary
Current motor vehicle transmissions lack efficient and space-saving switchability between gear states, leading to suboptimal performance and increased complexity.
A transmission system with a clutch mechanism and actuating device utilizing a ball and ramp mechanism, allowing for quick and precise switching between coupling and decoupling states, enabled by an actuator-driven actuating element that rotates to compress or release clutch packs, facilitating seamless gear engagement and disengagement.
Enables fast, precise, and space-saving switching of transmission states, improving gear selection and reducing complexity by using a single actuator to manage multiple clutch states, resulting in a compact and lightweight design.
Smart Images
Figure EP2024064513_02012025_PF_FP_ABST
Abstract
Description
[0001] Gearbox for a motor vehicle and motor vehicle with such a gearbox
[0002] The invention relates to a transmission for a motor vehicle according to the preamble of patent claim 1. Furthermore, the invention relates to a motor vehicle with at least one such transmission.
[0003] EP 2 791 530 B1 discloses an electric machine comprising a stator and a rotor, as well as a clutch device and an actuating device integrated into the rotor. The actuating device comprises an epicyclic gear train with a ring gear, a sun gear, planetary gears, and a carrier.
[0004] The object of the present invention is to provide a transmission for a motor vehicle and a motor vehicle with at least one such transmission, so that a particularly switchable transmission can be realized.
[0005] This object is achieved by a transmission having the features of patent claim 1 and by a motor vehicle having the features of patent claim 10. Advantageous embodiments of the invention are the subject of the dependent claims.
[0006] A first aspect of the invention relates to a transmission, also referred to as a transmission device or transmission apparatus, for a motor vehicle, also simply referred to as a vehicle, which is preferably designed as a motor vehicle, in particular as a passenger car. This means that the motor vehicle, in its fully manufactured state, has the transmission. The transmission has at least a first transmission element, which is rotatable about an element axis of rotation relative to a housing of the transmission. For example, the first transmission element is accommodated in the housing, also referred to as the transmission housing. The transmission also has at least one second transmission element provided in addition to the first transmission element. The transmission also has a clutch, also referred to as a clutch device or coupling device, which is also referred to as the first clutch.When reference is made to the clutch above and below, this means the first clutch unless otherwise stated. The clutch can be switched, i.e. adjusted, between a coupled state, which is also referred to as the first coupled state, and an uncoupled state, which is also referred to as the first uncoupled state. When reference is made to the clutch above and below, this means the first coupled state unless otherwise stated, and when reference is made to the uncoupled state before and below, this means the first uncoupled state unless otherwise stated. In the coupled state, the first transmission element is connected in a rotationally fixed manner to the second transmission element by means of the clutch, such that relative rotations between the first transmission element and the second transmission element about the element axis of rotation are prevented, i.e. avoided.In the uncoupled state, the first transmission element is rotatable about the element rotation axis relative to the second transmission element. This means that in the uncoupled state, the coupling allows relative rotations between the first transmission element and the second transmission element about the element rotation axis.
[0007] The clutch can be switched from the uncoupled state to the coupled state by pressing together at least one partial area of the clutch, also referred to as the first partial area, along the element's axis of rotation, and can be held in the coupled state, for example. When reference is made above and below to the partial area, this means the first partial area of the first clutch, unless otherwise stated. For example, the partial area of the clutch is or comprises at least one or more clutch discs, also referred to as first clutch discs, of the first clutch, wherein when reference is made above and below to the clutch discs or the clutch disc, this means the first clutch discs or the first clutch discs of the first clutch.For example, the respective first clutch disc is a respective first clutch plate, in particular a respective first friction plate, so that, for example, the first clutch is designed as a first friction clutch, in particular as a first multi-plate clutch. Thus, for example, the first transmission element and the second transmission element can be connected to one another in a frictionally engaged and rotationally fixed manner by means of the first clutch. For example, the clutch discs form a first clutch pack, in particular a first plate pack, wherein the first clutch can be switched from the first uncoupled state to the first coupled state and, in particular, can be held in the first coupled state by pressing the first clutch pack together along the element's axis of rotation.The first partial area of the first clutch, that is to say, for example, the first clutch pack, is compressed along the element rotation axis, for example, by exerting a first force on the first partial area, wherein the first force, in particular its effective direction, runs parallel to the element rotation axis or coincides with the element rotation axis.
[0008] The transmission also has an actuating device by means of which the partial region of the clutch can be compressed along the element's rotational axis, whereby the clutch can be switched from the uncoupled state to the coupled state and, in particular, can be held in the coupled state. In other words, the clutch remains in the coupled state, i.e., the clutch is held in the coupled state, as long as the partial region of the clutch is compressed along the element's rotational axis, in particular, is subjected to the aforementioned first force and is thereby compressed.
[0009] The transmission has, for example, at least one shiftable gear. In particular, it is conceivable for the transmission to have at least or exactly two shiftable gears, namely a shiftable first gear and a shiftable second gear. The feature that the respective gear is shiftable is to be understood as meaning that the respective gear can be engaged and disengaged. If, for example, the first gear is engaged, in particular at the same time, the second gear is disengaged. If, for example, the second gear is engaged, in particular at the same time, the first gear is disengaged. By switching the clutch from the uncoupled state to the coupled state, the gear, in particular the first gear, can be engaged, for example, so that, for example, the gear, in particular the first gear, is engaged in the coupled state.By switching the clutch from the coupled state to the uncoupled state, for example, the gear, in particular the first gear, is disengaged, so that, for example, in the uncoupled state of the clutch, the gear, in particular the first gear, is disengaged.
[0010] In order to be able to realize a particularly advantageous shiftability of the transmission, it is provided according to the invention that the actuating device has at least one ball, also referred to as the first ball. When reference is made above and below to the ball, this means the first ball unless otherwise stated. The actuating device also has an actuating element provided in addition to the first transmission element and in addition to the second transmission element, which is rotatable about an actuating axis of rotation relative to the first transmission element and relative to the second transmission element and preferably relative to the housing. The actuating element has at least one actuating ramp, which is also referred to as the first actuating ramp, first ramp or ramp.When reference is made above and below to the actuation ramp or the ramp, this refers to the first actuation ramp unless otherwise stated. The ball is arranged along the element's rotational axis between the coupling portion and the actuation element and can roll along the actuation ramp, particularly when the actuation element is rotated about the actuation rotational axis. In other words, for example, the ball rolls along the associated actuation ramp when the actuation element rotates about the actuation rotational axis.
[0011] The actuating device also has an actuator, which can be, for example, an electrically and / or electromechanically and / or hydraulically and / or pneumatically operated actuator. The actuating element can be driven by the actuator and thereby rotated about the actuating axis of rotation while the ball rolls along the actuating ramp. In other words, the actuating element can be driven and rotated by the actuator in such a way that the ball rolls along the actuating ramp. By rolling the ball along the actuating ramp, the ball can be pressed at least indirectly against the partial area of the coupling along the element axis of rotation, so that, for example, the aforementioned first force can be exerted on the partial area of the coupling. As a result, the partial area of the coupling can be compressed along the element axis of rotation via the ball, thus switching the coupling from the uncoupled state to the coupled state.For example, when the actuating element is rotated about the actuating axis of rotation by means of the actuator in such a way that the ball rolls along the associated actuating ramp, the ball is moved, in particular a short distance, along the element axis of rotation, in particular in the direction of the partial area, whereby the partial area is compressed.In this case, it is provided in particular that the actuating element is locked, i.e. immovable, along the actuating axis of rotation and preferably also along the element axis of rotation relative to the first gear element and relative to the second gear element, so that by rotating the actuating element about the actuating axis of rotation, the ball can roll along the associated actuating ramp and can thus be moved, in particular at least a short distance, along the element axis of rotation and in particular in the direction of the partial area, in order to thereby apply the first force to the partial area, i.e. to press it together and thus to switch the coupling into the coupling state, i.e. to transfer it.The invention enables the transmission to be shifted quickly, precisely, and in a space-saving manner as required, since the clutch can be shifted into the coupling state quickly, precisely, and in a space-saving manner as required by means of the actuating device.
[0012] By means of the actuating ramp and the ball, the partial area of the coupling can be pressed together along the element's axis of rotation, in particular in that the ramp extends, for example, in a plane also referred to as the first plane, which runs obliquely to the element's axis of rotation and preferably obliquely to the actuating axis of rotation. As a result, when the actuating element is rotated about the actuating axis of rotation in such a way that the ball rolls along the actuating ramp, the ball is moved along the element's axis of rotation, in particular a short distance, in the direction of the partial area of the coupling, whereby the partial area of the coupling is pressed together. In particular, for example, the ball is moved along the element's axis of rotation from a decoupling position into a coupling position by rolling along the actuating ramp and thus rolling along the actuating ramp. The decoupling position brings about the decoupling state.In other words, the decoupling position of the ball permits the decoupling state of the clutch. The coupling position moves the coupling state of the clutch, so that by moving the ball from the decoupling position to the coupling position, the clutch can be switched, i.e. transferred, from the decoupling state to the coupling state. If, for example, the actuating element is rotated about the actuating axis of rotation by means of the actuator in such a way that, for example, the ball rolls down the actuating ramp or another, further ramp of the actuating element, this allows, for example, a relaxation of the partial area of the clutch along the element's axis of rotation, so that switching or transferring the clutch from the coupling state to the decoupling state is permitted or effected. The clutch can thus be switched between the coupling state and the uncoupling state quickly, precisely, as needed, and in a particularly space-efficient manner.For example, if the clutch rolls down the actuation ramp or the other, further ramp of the.
[0013] actuating element, for example, the ball moves from the coupling position to the uncoupling position, whereby the clutch moves from the coupling state to the
[0014] Decoupling state is switched. In particular, it is provided that the ball is fixed for rotations about the actuating axis of rotation and preferably also about the element axis of rotation relative to the housing. In other words, it is preferably provided that the ball is secured against rotations about the actuating axis of rotation and preferably also about the element axis of rotation relative to the housing, so that by rotating the actuating element caused or effected by the actuator, the ball can be moved as required from the decoupling position into the coupling position and preferably (again) from the coupling position into the decoupling position.
[0015] In order to be able to realize a particularly advantageous shiftability of the transmission to a particularly space-saving value, it is provided in one embodiment of the invention that the first transmission element is a gearwheel.
[0016] A further embodiment is characterized in that the second transmission element is a gear or the housing, whereby a particularly advantageous shiftability of the transmission can be achieved in a particularly space-saving manner.
[0017] In a further, particularly advantageous embodiment of the invention, the transmission comprises a planetary gear set. The planetary gear set comprises at least one ring gear, also referred to as the first planetary element. The planetary gear set further comprises at least one sun gear, also referred to as the second planetary element. Furthermore, the planetary gear set comprises at least one planet carrier, also referred to as the third planetary element. To achieve particularly advantageous shiftability of the transmission, the second transmission element is one of the planetary elements.
[0018] In order to be able to realize a particularly switchable transmission in a particularly space-saving manner, it is provided in a further embodiment of the invention that the actuating axis of rotation coincides with the element axis of rotation.
[0019] In a further, particularly advantageous embodiment of the invention, the transmission has a third transmission element provided in addition to the first transmission element and in addition to the second transmission element, which is rotatable about the element rotation axis relative to the first transmission element and relative to the second transmission element and in particular relative to the housing. The first transmission element and the third transmission element are thus arranged coaxially to one another. Preferably, the first transmission element is one of the planetary elements, with the third transmission element preferably being another of the planetary elements. Furthermore, it is conceivable for the planetary gear set to have an additional, fourth planetary element, which is, for example, the third transmission element.In particular, the first transmission element can be the ring gear of the planetary gear set, wherein, for example, the third transmission element is a second ring gear of the planetary gear set provided in addition to the ring gear.
[0020] The transmission preferably has a second clutch provided in addition to the clutch, which can be switched between a second coupled state and a second uncoupled state. In the second coupled state, the transmission element is rotationally connected to the second transmission element by means of the second clutch. In the second uncoupled state, the third transmission element can be rotated about the element rotation axis relative to the second transmission element. This means that in the second uncoupled state, the second clutch allows relative rotations between the third transmission element and the second transmission element about the element rotation axis. The second clutch can be switched from the second uncoupled state to the second coupled state by pressing at least a second partial region of the second clutch together along the element rotation axis, and in particular can be held in the second coupled state.The previous and following statements regarding the first clutch, in particular the first sub-region, can readily be applied to the second clutch, and in particular the second sub-region. Thus, for example, the second sub-region is or comprises second clutch discs of the second clutch, wherein the second clutch discs are, for example, second plates and / or second friction discs of the second clutch. Thus, for example, the second clutch can be a second friction clutch, in particular a second multi-plate clutch.Thus, for example, the second subregion is or comprises a second clutch pack, in particular a disk pack, formed, for example, by and / or comprising second clutch discs, wherein the second clutch can be switched, i.e., transferred, from the second decoupling state to the second coupling state by compressing the second clutch pack along the element rotation axis. If, for example, a relaxation of the second subregion of the second clutch along the element rotation axis is permitted, this permits or causes a switching, i.e., transfer of the second clutch from the second coupling state to the second decoupling state.
[0021] The ball and the actuating ramp are arranged on a first side of the actuating element facing the first partial region of the first coupling along the element rotation axis. The actuating device has at least one second ball, which is arranged on a second side of the actuating element facing away from the first partial region, from the first ball, and from the first side along the element rotation axis and facing the second partial region of the second coupling along the element rotation axis. For example, the actuating element can be integral, i.e., formed from a single piece. In other words, the actuating element is preferably integral, i.e., formed from a single piece.
[0022] The actuating element has at least one second actuating ramp arranged on the second side of the actuating element, which is also simply referred to as a second ramp. The second ball, which is arranged along the element's axis of rotation between the second partial region of the second coupling and the actuating element, can roll, in particular directly, along the second actuating ramp. The actuating element can be driven by means of the actuator and can thus be rotated about the actuating axis of rotation with the second ball rolling along the second actuating ramp. In other words, the actuating element can be driven by means of the actuator and can thus be rotated about the actuating axis in such a way that the second ball rolls, in particular directly, along the second actuating ramp.By rolling the second ball along the second actuation ramp, the second ball can be pressed at least indirectly against the second partial area along the element's rotation axis, whereby the second partial area of the second coupling can be compressed along the rotation axis D1 via the second ball, thereby transferring the second coupling from the second uncoupling state to the second coupling state. The previous and following statements regarding the first actuation ramp and the associated first ball can also be readily applied to the second actuation ramp and the associated second ball, and vice versa.If, for example, the actuating element is rotated about the actuating axis of rotation by means of the actuator in such a way that the second ball rolls along the second actuating ramp, in particular in such a way that the second ball rolls up the second actuating ramp, the second ball is thereby moved, for example, along the element axis of rotation, in particular a short distance, in the direction of the second partial area, whereby the second partial area is compressed.In particular, when the actuating element is rotated about the actuating axis of rotation by means of the actuator in such a way that the second ball rolls along the second actuating ramp, in particular rolls up the second actuating ramp, the second ball is pressed at least indirectly against the second partial area along the element axis of rotation, so that a second force acting at least indirectly on the second partial area along the element axis of rotation is exerted via the second ball, by means of which second force the second partial area is compressed along the element axis of rotation.For example, it is preferably provided that the second ball is secured against rotation about the actuating axis of rotation and preferably also against rotation about the element axis of rotation relative to the housing, whereby rotation of the actuating element about the actuating axis of rotation moves the second ball particularly advantageously along the element axis of rotation in the direction of the second partial region and thus the second partial region can be advantageously compressed, i.e. squeezed together, along the element axis of rotation. For example, the second ball is movable along the element axis of rotation between a second coupling position and a second decoupling position, wherein, for example, the second coupling position brings about the second coupling state, and the second decoupling position brings about the second decoupling state. Thus, if the second ball is in the second coupling position, the second coupling is in the second coupling state.For example, if the second ball is in the second decoupling position, the second coupling is in the second decoupling state. If the actuating element is rotated about the actuating axis of rotation by means of the actuator in such a way that the second ball rolls along the second actuating ramp, in particular rolls up the second actuating ramp, the second ball is or will be moved from the second decoupling position into the second coupling position along the element's axis of rotation. This compresses the second partial area.If, for example, the actuating element is rotated about the actuating rotation axis by means of the actuator in such a way that the second ball rolls down the second actuating ramp or rolls down a fourth actuating ramp of the actuating element, such that the second ball is moved or can be moved from the second coupling position into the second decoupling position, the second partial region can thereby relax at least partially along the element rotation axis and, as a result, the second clutch can be switched from the second coupling state to the second decoupling state, in particular a switching of the second clutch from the second coupling state to the second decoupling state can be effected or permitted. This embodiment thus enables particularly needs-based and comprehensive, as well as needs-based and space-efficient gearshift of the transmission.
[0023] For example, by switching the second clutch from the second decoupling state to the second coupling state, second gear can be engaged, so that second gear is engaged in the second coupling state. By switching the second clutch from the second coupling state to the second decoupling state, for example, second gear can be disengaged, so that, for example, second gear is disengaged in the second decoupling state of the second clutch. This allows the transmission to be shifted or shiftable as needed in a particularly space-efficient manner. The gears can be engaged or disengaged as needed, i.e. selectively, using the same actuating element and the same, only one actuator, thus ensuring a particularly compact and lightweight transmission design.
[0024] In order to be able to shift the transmission particularly advantageously, it is provided in a further embodiment of the invention that the actuating element is designed to press the first ball along the element rotation axis at least indirectly against the first partial area in at least one first rotational position of the actuating element and at the same time to press the second ball along the element rotation axis at least indirectly against the second partial area, as a result of which the clutches are simultaneously in the coupling states in the at least one first rotational position.
[0025] A further embodiment is characterized in that the actuating element is designed to press the first ball along the element's rotational axis at least indirectly against the first partial region in at least one second rotational position of the actuating element, while simultaneously preventing the second ball from being pressed along the element's rotational axis against the second partial region, whereby in the at least one second rotational position, only the first clutch is in the first coupling state and simultaneously the second clutch is in the second decoupling state. This allows for particularly advantageous switchability.
[0026] Finally, it has proven particularly advantageous for realizing a particularly advantageous shiftability of the transmission if the actuating element is designed to press the second ball along the element rotation axis at least indirectly against the second partial area in at least one third rotational position of the actuating element, while at the same time pressing the first ball along the element rotation axis against the first partial area is omitted, as a result of which in the at least one second rotational position the second clutch is in the second coupling state and at the same time the first clutch is in the first uncoupling state.
[0027] In the at least one first rotational position, for example, a parking lock of the motor vehicle is activated, i.e. engaged, so that, for example, particularly when the motor vehicle is parked on or near an incline, unwanted rolling away of the motor vehicle can be prevented. In particular, it is conceivable that in the at least one first rotational position, the first transmission element, in particular the first ring gear, and the third transmission element, in particular the second ring gear, are simultaneously connected in a rotationally fixed manner to the housing, and thus to the second transmission element, so that the ring gears cannot rotate relative to the housing. In particular, the ring gears are thereby clamped to the housing or clamped against the housing. As a result, the parking lock can be engaged particularly advantageously and can reliably prevent the motor vehicle from rolling away unwantedly.
[0028] In the at least one second rotational position, for example, the first gear is engaged, in particular while the second gear is disengaged. In the at least one third rotational position, for example, the second gear is engaged, in particular while the first gear is disengaged.
[0029] It has proven particularly advantageous if the actuating element is designed such that, in at least one fourth rotational position of the actuating element, pressing of the first ball along the element rotational axis against the first partial region is avoided, while at the same time pressing of the second ball along the element rotational axis against the second partial region is avoided, as a result of which, in the at least one fourth rotational position, the clutches are simultaneously in the uncoupling states. Thus, for example, in at least one fourth rotational position, both first gear and second gear are disengaged at the same time, so that, for example, a neutral state of the transmission is engaged, i.e. activated. This makes it possible to achieve particularly advantageous and demand-oriented shifting in a particularly space-efficient manner.
[0030] A second aspect of the invention relates to a motor vehicle, also simply referred to as a vehicle and preferably designed as a motor vehicle, in particular as a passenger car, which has at least or exactly one transmission according to the first aspect of the invention and at least one drive device by means of which the motor vehicle can be driven via the transmission, in particular purely electrically. The drive device has, for example, at least or exactly one electric machine by means of which the motor vehicle can be driven via the transmission, in particular purely relatively. Advantages and advantageous embodiments of the first aspect of the invention are to be regarded as advantages and advantageous embodiments of the second aspect of the invention, and vice versa. Further details of the invention emerge from the following description of a preferred embodiment with the associated drawings. In the drawings:
[0031] Fig. 1 is a schematic representation of a transmission of a motor vehicle; and
[0032] Fig. 2 shows a partial schematic and developed representation of a
[0033] Gearbox operating device.
[0034] In the figures, identical or functionally identical elements are provided with the same reference symbols.
[0035] Fig. 1 shows a detail in a schematic representation of a transmission 1 of a motor vehicle, also simply referred to as a vehicle, and preferably designed as a motor vehicle, in particular a passenger car. The motor vehicle has, for example, at least or exactly two vehicle axles arranged consecutively and thus one behind the other in the longitudinal direction of the motor vehicle, which are also simply referred to as axles. For example, in particular exactly one of the vehicle axles comprises the transmission 1. The respective vehicle axle has at least or exactly two vehicle wheels, also simply referred to as wheels, wherein the respective vehicle wheels of the respective vehicle axle are arranged on opposite sides of the motor vehicle in the transverse direction of the motor vehicle. The vehicle axle having and thus comprising the transmission 1 is shown in Fig.1 is shown particularly schematically and designated by 2, wherein the vehicle wheels of the vehicle axle 2 are shown particularly schematically in Fig. 1 and designated by 3 and 4. The vehicle wheels 3 and 4 of the vehicle axle 2 and thus of the motor vehicle are ground contact elements of the motor vehicle, which is supported or can be supported on a ground via the ground contact elements downwards in the vertical direction of the motor vehicle. If the motor vehicle is driven along the ground while the motor vehicle is supported on the ground via the ground contact elements downwards in the vertical direction of the motor vehicle, the ground contact elements roll, in particular directly, on the ground.
[0036] The transmission 1 is a component of a drive device 5, wherein the vehicle axle 2 has the drive device 5. The drive device 5 has an electric machine 6, which is shown particularly schematically in Fig. 1 and which has a stator 7 and a rotor 8. The rotor 8 can be driven by means of the stator 7 and can therefore be rotated about a machine axis of rotation 9 relative to the stator 7. Via its rotor 8, the electric machine 6 can provide drive torques for driving at least or exactly one of the vehicle wheels 3 and 4, so that the electric machine 6 can drive at least or exactly one of the vehicle wheels 3 and 4 and thus the motor vehicle, in particular purely electrically, via its rotor 8.
[0037] The transmission 1 has a drive 10, also referred to as the input side, via which the respective drive torque provided or can be provided by the electric machine 6 via its rotor 8 can be introduced into the transmission 1. The transmission 1 also has an output 11, also referred to as the output side, via which an output torque resulting from the respective drive torque introduced into the transmission 1 can be discharged from the transmission 1, i.e. can be provided by the transmission 1. For example, the transmission 1 has a gear ratio different from one from the input 10 to the output 11, so that, for example, the output torque is greater or lesser than the drive torque.
[0038] The transmission 1, in particular the drive 10, has an input shaft 12, also referred to as the drive shaft, which can be coupled or is coupled to the rotor 8, for example in a torque-transmitting manner, in particular in a rotationally fixed manner. Thus, the drive torque provided or capable of being provided by the electric machine 6 via the rotor 8 can be transmitted to the input shaft 12, whereby the respective drive torque can be introduced into the transmission 1. The transmission 1, in particular the output 11, which is also referred to as the output or output side, has an output shaft 13, also referred to as the output shaft, via which the respective output torque, which is also referred to as the output torque, can be provided by the transmission 1 and thus discharged from the transmission 1.For example, the output shaft 13 can be coupled or is coupled to at least one of the vehicle wheels 3 and 4 in a torque-transmitting manner, so that at least one of the vehicle wheels 3 and 4 and thus the motor vehicle can be driven, in particular purely electrically, by the output shaft 13.
[0039] The transmission 1 has a housing 14, which is shown particularly schematically and in detail in Fig. 1, wherein, for example, the input shaft 12 and / or the output shaft 13 can each be arranged at least partially in the housing 14. The transmission 1 has a planetary gear set 15, which is, for example, at least partially arranged in the housing 14. The planetary gear set 15 has, in particular precisely, a sun gear 16, which in this case is connected in a rotationally fixed manner to the input shaft 12. Furthermore, the planetary gear set 15 has a first ring gear 17 and a second ring gear 18 provided in addition to the first ring gear 17. The planetary gear set 15 also has a planet carrier 19. Furthermore, the planetary gear set 15 comprises planet gears, of which one planet gear is shown in Fig. 1 and designated 20.The respective planet gear 20 is designed as a stepped planet gear and has, for example, a first toothing 21 with a first diameter, in particular an outer diameter, and a second toothing 22 with a second diameter, in particular a second outer diameter. From Fig. 1 it can be seen that the diameters of the toothings 21 and 22 are different, in this case such that the second diameter is smaller than the first diameter. Via the first toothing 21, the respective planet gear 20 meshes, in particular directly, with the sun gear 16 and with the ring gear 17, wherein meshing of the toothing 21 with the ring gear 17 is omitted. Via the toothing 22, the planet gear 20 meshes, in particular directly, with the ring gear 18, wherein meshing of the toothing 22 with the sun gear 16 and with the ring gear 17 is omitted. The respective planetary gear 20 is rotatably held, in particular mounted, on the planetary carrier 19.The sun gear 16, the ring gears 17 and 18, and the planet carrier 19 are planetary elements of the planetary gear set 15, wherein the respective planetary element, when not connected in a rotationally fixed manner to the housing 14, is rotatable relative to the housing 14 about an element rotation axis 23 common to the planetary elements. Furthermore, the planetary elements and the housing 14 are transmission elements of the transmission 1, wherein, for example, the ring gear 17 is a first of the transmission elements, the housing 14 is a second of the transmission elements, and the ring gear 18 is a third of the transmission elements. It can be seen that the ring gear 17 is rotatable about the element rotation axis 23 relative to the housing 14 and relative to the ring gear 18, and the ring gear 18 is rotatable about the element rotation axis 23 relative to the housing 14 and relative to the ring gear 17.Furthermore, the second gear element is provided in addition to the first gear element, and the third gear element is provided in addition to the second gear element and in addition to the first gear element.
[0040] As will be explained in more detail below, the transmission 1 has at least or exactly two shiftable, i.e. engageable and disengageable gears, namely a first gear and a second gear. For example, the gears differ from one another in their transmission ratios. The transmission 1 has a first clutch 24, by means of which, as will be explained in more detail below, the ring gear 17 can be rotationally connected to the housing 14, so that the first clutch 24 is also referred to as a first brake. The transmission 1 also has a second clutch 25 provided in addition to the clutch 24. By means of the second clutch 25, the second ring gear 18 can be rotationally connected to the housing 14, so that the second clutch 25 is also referred to as a second brake. For example, the respective clutch 24, 25 is designed as a respective friction clutch, in particular as a respective multi-plate clutch.
[0041] The first clutch 24 is switchable between a first coupling state and a second coupling state. In the first coupling state, the first ring gear 17 is rotationally connected to the housing 14 by means of the first clutch 24, such that the first ring gear 17 cannot rotate about the element rotation axis 23 relative to the housing 14. In the first decoupling state, the first clutch 24 permits relative rotations between the ring gear 17 and the housing 14 about the element rotation axis 23, such that in the first decoupling state, the ring gear 17 can rotate about the element rotation axis 23 relative to the housing 14. Accordingly, the second clutch 25 is switchable between a second coupling state and a second decoupling state.In the second coupling state, the second ring gear 18 is connected to the housing 14 in a rotationally fixed manner by means of the second clutch 25, and in the second decoupling state, the second clutch 25 allows relative rotations between the second ring gear 18 and the housing 14 about the element rotation axis 23, so that in the second decoupling state, the second ring gear 18 can rotate about the element rotation axis 23 relative to the housing 14. If the first clutch 24 is in the first decoupling state, the ring gear 17 is rotatable about the element rotation axis 23 relative to the housing 14 both when the clutch 25 is in the second decoupling state and when the second clutch 25 is in the second coupling state.If the second clutch 25 is in the second decoupling state, the ring gear 17 is rotatable about the element rotation axis 23 relative to the housing 14 both when the first clutch 24 is in the first coupling state and when the first clutch 24 is in the first decoupling state.
[0042] If the first clutch 24 is engaged, i.e. the first clutch 24 is in the first coupling state, then first gear is engaged, i.e. activated. If the first clutch 24 is disengaged, i.e. the first clutch 24 is in the first decoupling state, then first gear is disengaged, i.e. deactivated. If the second clutch 25 is engaged, i.e. the second clutch 25 is in the second coupling state, then second gear is engaged, i.e. activated. If the second clutch 25 is in the second decoupling state, i.e. the second clutch 25 is disengaged, then second gear is disengaged, i.e. deactivated. If the clutches 24, 25 are in the decoupling states at the same time, then first gear and second gear are disengaged at the same time, i.e. deactivated.If the clutches 24, 25 are simultaneously in their coupled states, first gear and second gear are engaged simultaneously, which, for example, tensions the transmission 1. This engages, for example, a parking lock, in particular a mechanical one, which secures at least one of the vehicle wheels 3 and 4 against rotation relative to the housing 14. This allows the motor vehicle to be secured against unwanted rolling away, particularly when the motor vehicle is parked on or near a slope.
[0043] The first clutch 24 can be switched from the first uncoupling state to the first coupling state by pressing at least a first partial region T1 of the first clutch 24 together along the element rotation axis 23, and in particular can be held in the first coupling state. If, for example, an at least partial relaxation of the first partial region T1 along the element rotation axis 23 is permitted or effected, this allows or effected a switching of the first clutch 24 from the first coupling state to the first uncoupling state. If the first partial region T1 is not compressed, the first clutch 24 is in its first uncoupling state. The second clutch 25 can be switched from the second uncoupling state to the second coupling state by pressing at least a second partial region T2 (Fig. 2) together along the element rotation axis 23, and in particular can be held in the second coupling state.For example, if at least partial relaxation of the second partial region T2 along the element rotation axis 23 is permitted or effected, this allows or effected a switching of the second clutch 25 from the second coupling state to the second decoupling state. If compression of the second partial region T2 along the element rotation axis 23 does not occur, the second clutch 25 is in its second decoupling state.
[0044] For example, the respective sub-region T1, T2 of the respective clutch 24, 25 has a respective clutch pack, in particular designed as a disc pack, very particularly as a plate pack, which, for example, when the respective clutch pack is designed as the respective disc pack or plate pack, comprises a plurality of clutch discs, in particular plates, of the respective clutch 24, 25, which are arranged one after the other along the element rotation axis 23. If the respective clutch pack or the respective clutch discs are pressed together along the element rotation axis 23, i.e., compressed, the respective clutch 24, 25 is thereby switched from the respective uncoupled state to the respective coupled state. As a result, the respective ring gear 17, 18 is frictionally and rotationally fixedly connected to the housing 14 by means of the respective clutch 24, 25.
[0045] The transmission 1 also has an actuating device 26, illustrated particularly schematically in Fig. 1, by means of which the first partial region T1 of the first clutch 24 can be compressed along the element rotation axis 23, whereby the first clutch 24 can be switched from the first uncoupling state to the second coupling state and can be held in the first uncoupling state. Furthermore, the first clutch 24 can be switched from the first coupling state to the first uncoupling state by means of the actuating device 26, in particular by allowing or effecting the previously described, at least partial relaxation of the partial region T1 along the element rotation axis 23 by means of the actuating device 26.By means of the actuating device 26, the second partial region T2 of the second clutch 25 can also be compressed along the element rotation axis 23, whereby the second clutch 25 can be switched from the second uncoupling state to the second coupling state and, in particular, can be held in the second coupling state. Furthermore, for example, by means of the actuating device 26, the second clutch 25 can be switched from the second coupling state to the second uncoupling state, in particular by allowing or effecting the previously described, at least partial relaxation of the second partial region T2 along the element rotation axis 23 by means of the actuating device 26.
[0046] In order to be able to realize a particularly advantageous, needs-based and rapid shiftability of the transmission 1 in a particularly space-efficient manner, i.e. in order to be able to selectively engage or disengage the gears of the transmission 1 quickly, needs-based and precisely as well as in a space-efficient manner, as can be seen from Fig. 2, the actuating device 26 has an actuating element 35 common to the partial areas T1 and T2 and thus to the clutches 24 and 25, wherein in Fig. 2 the partial areas T1 and T2 and the actuating element 35 are shown in a developed view. The actuating element 35 is rotatable about an actuating axis of rotation 36 (Fig. 1) relative to the housing 14, wherein the actuating axis of rotation 36 coincides with the element axis of rotation 23. Therefore, the element axis of rotation 23 and the actuating axis of rotation 36 are collectively referred to as the axis of rotation.This means that when reference is made previously and subsequently to the axis of rotation, this refers to the element axis of rotation 23 and the actuating axis of rotation 36. It can be seen that the actuating element 35 is provided in addition to the gear elements and in addition to the planetary elements. Furthermore, the actuating element 35, viewed along the axis of rotation, is arranged at least partially between the sub-regions T1 and T2. The actuating element 35 has a first side S1 and a second side S2. The first side S1 faces the sub-region T1 along the element axis of rotation 23, i.e., along the axis of rotation, and faces away from the side S2 via the sub-region T2, and the side S2 faces the sub-region T2 along the axis of rotation and faces away from the sub-region T1 from the side S1. In Fig.2 shows different rotational positions of the actuating element 35, wherein the actuating element 35 can be rotated about the actuating rotation axis 36 relative to the housing 14 into the respective rotational position. In particular, the actuating element 35 can be fixed, i.e. locked, in the respective rotational position relative to the housing 14, so that, for example, a rotation of the actuating element 35 about the element rotation axis 23 or about the rotation axis and relative to the housing 14 from the respective rotational position can be prevented, i.e. avoided. A first of the rotational positions is designated G1 in Fig. 2, a second of the rotational positions is designated G2 in Fig. 2, a third of the rotational positions is designated N in Fig. 2, and a fourth of the rotational positions is designated P in Fig. 2.
[0047] In the first rotational position G1, second gear is engaged while first gear is disengaged. This means that in the first rotational position G1, partial area T2 is compressed along the rotational axis, while the clutch 24 is in the first decoupling state, in particular while compression of partial area T1 along the rotational axis does not occur. Thus, in the rotational position G1, the actuating element 35 and the second clutch 25 are in the second coupling state, while the first clutch 24 is in the first decoupling state. In the first rotational position G1, partial area T2 is compressed around a rotational axis by means of the actuating element 35.
[0048] In the second rotational position G2, first gear is engaged, while second gear is disengaged. Thus, in the second rotational position G2, the first partial region T1 is pressed together along the axis of rotation, while the second clutch 25 is in the second decoupling state, in particular while a compression of the second partial region T2 along the axis of rotation does not occur. Thus, in the second rotational position G2, the first clutch 24 is in the first coupling state, while the second clutch 25 is in the second decoupling state. In the first rotational position G1, a compression of the partial region T1 along the axis of rotation caused by the actuating element 35 does not occur. In the second rotational position G2, the partial region T1 is pressed together along the axis of rotation by means of the actuating element 35, in particular while a compression of the partial region T2 along the axis of rotation caused by the actuating element 35 does not occur.In the third rotational position N, both the first gear and the second gear are disengaged simultaneously, so that in the third rotational position N both the first clutch 24 and the second clutch 25 are simultaneously in the uncoupled states. Thus, in the third rotational position N, both the compression of the partial area T1 along the axis of rotation caused by the actuating element 35 and the compression of the partial area T2 along the axis of rotation caused by the actuating element 35 are prevented. In the third rotational position N, the transmission 1 is thus in a neutral state. In the fourth rotational position P, the transmission 1 is in a parking lock state in which the aforementioned parking lock, which is in particular a mechanical parking lock, is engaged. In the third rotational position N, both the first gear and the second gear are disengaged simultaneously.In the fourth rotational position P, both the first gear and the second gear are engaged simultaneously, so that in the fourth rotational position P, both the first clutch 24 and the second clutch 25 are simultaneously in the coupled states. In the fourth rotational position P, both the partial area T1 and the partial area T2 are simultaneously pressed together along the rotational axis by means of the actuating element 35, so that both ring gears 17 and 18 are simultaneously connected to the housing 14 in a rotationally fixed manner.
[0049] From Fig. 2 it can be seen that the actuating device 26 has, for example, a plurality of first balls, of which a first ball can be seen in Fig. 2 and is designated by 27. The first ball 27 is arranged along the axis of rotation on side S1 and thus between the partial region and the actuating element 35. In addition, the actuating device 26 has a plurality of second balls, of which a second ball 28 can be seen in Fig. 2 and is designated by 28. The respective second ball 28 is arranged along the axis of rotation between the partial region T2 and the actuating element 35 and thus on side S2. The actuating element 35 has ramps 29a-c on side S1.In addition, the actuating element 35 has projections 30a, b on side S1, which are raised in the axial direction of the transmission 1 and thus along the axis of rotation towards the partial area T1 relative to partial areas 31a, b of the actuating element 35, whose partial areas 31a, b are arranged on side S1. This means that the partial areas 31a, b are set back from the projections 30a, b along the axis of rotation and thus in the axial direction of the transmission 1 away from the partial area T1 relative to the projections 30a, b. The partial areas 31a, b and the projections 30a, b are arranged alternately one after the other in the circumferential direction of the actuating element 35 running around the axis of rotation, so that, in particular, a respective one of the projections 30a, b is arranged in the circumferential direction of the actuating element 35 between, in particular, exactly two of the partial areas 31a, b.In this case, viewed in the circumferential direction of the actuating element 35, in particular precisely, a respective one of the ramps 29a-c is arranged between the respective partial region 31a and the respective projection 30a, in the present case such that in the circumferential direction of the actuating element 35 the ramp 29a is arranged between the partial region 31a and the projection 30a, the ramp 29b is arranged between the projection 30a and the partial region 31b and the ramp 29c is arranged between the partial region 31b and the projection 30b.
[0050] On side S2, the actuating element 35 has ramps 32a, b. Furthermore, on side S2, the actuating element 35 has projections 33a, b and at least one partial region 34a which is set back from the partial region T2 along the axis of rotation relative to the projections 33a, b. Thus, the projections 33a, b are raised relative to the partial region 34a along the axis of rotation toward the partial region T2. In the circumferential direction of the actuating element 35 running around the axis of rotation, for example, the projections 33a, b and the partial region 34a are arranged alternately one after the other, wherein in the present case, in particular precisely, a respective one of the ramps 32a, b is arranged between the respective projection 33a, b and the partial region 34a. In particular, it is conceivable that the projection 33a is the projection 33b and vice versa.
[0051] The respective ramp 29a-c, 32a, b runs in a respective plane which is oblique to the axis of rotation.
[0052] The actuating device 26 also has an actuator 35, shown particularly schematically, by means of which the actuating element 35 can be driven and thus rotated about the axis of rotation relative to the housing 14 and also relative to the ring gears 17 and 18, so that by means of the actuator 35 the actuating element 35 can be rotated about the axis of rotation relative to the housing 14 and also relative to the ring gears 17 and 18 into the different rotational positions G1, G2, N and P.If the actuating element 35 is rotated by means of the actuator 35 about the axis of rotation relative to the housing 14 relative to the ring gears 17 and 18 in such a way that the respective ball 27, 28 rolls along the respective ramp 29a-c, 32a, b in such a way that the respective ball 27, 28 rolls up the respective ramp 29a-c, 32a, b and thus comes, in particular rolls, from the respective partial area 31a, b, 34a onto the respective projection 30a, b, 33a, b, the respective ball 27, 28 is pressed at least indirectly, in particular directly, against the respective partial area T1, T2 along the axis of rotation, whereby the respective partial area T1, T2 is pressed together along the axis of rotation via the respective ball 27, 28 and thus the respective clutch 24, 25 is closed, thus from the respective decoupling state into the respective coupling state is switched.If the actuating element 35 is rotated about the axis of rotation by means of the actuator 35 in such a way that the respective ball 27, 28 rolls along the respective ramp 29a-c, 32a, b, in such a way that the respective ball 27, 28 rolls from the respective projection 30a, b, 33a, b into the respective partial region 31a, b, 34a, the aforementioned relaxation of the respective partial region T1, T2 along the axis of rotation is thereby permitted or effected, whereby the respective clutch 24, 25 is transferred from the respective coupled state to the respective uncoupled state, i.e. is switched. For example, the actuator 35 can rotate the actuating element 35 about the axis of rotation in a first direction of rotation and preferably in a second direction of rotation opposite to the first direction of rotation, wherein the second rotation is opposite to the first direction of rotation and vice versa. As a result, the transmission 1 can be shifted as required.
[0053] It can be seen that in the first rotational position G1, the ball 28 is arranged on the projection 33a and thus along the axis of rotation between the projection 33a and the partial area T2, whereby the ball 28 is pressed, i.e., pushed, against the partial area T2 along the axis of rotation. This compresses the partial area T2. Pressing of the ball 27 in the partial area T1 is avoided, so that the clutch 25 is closed while the clutch 24 is open. The ball 27 is arranged in the partial area 33a, i.e., along the axis of rotation in the partial area 31a, i.e., along the axis of rotation in the partial area 31a and the partial area T1.
[0054] In the second rotational position G2, the ball 27 is arranged on the projection 30a and thus along the rotational axis between the projection 30a and the partial area T1, whereby the ball 27 is pressed, i.e., pushed, against the partial area T1 along the rotational axis. As a result, the partial area T1 is compressed, i.e., compressed, whereby the clutch 24 is closed. Pressing of the ball 27 against the partial area T2 does not occur, so that the partial area T2 is not compressed. Thus, the clutch 25 is opened. The ball 28 is arranged in the partial area 34a and thus along the rotational axis between the partial area 34a and the partial area T2.
[0055] In the third rotational position N, the ball 27 is no longer pressed against the partial area T1 along the rotational axis, while the ball 28 is no longer pressed against the partial area T2 along the rotational axis. Thus, the clutches 24 and 25 are opened simultaneously. The ball 27 is arranged in the partial area 31b and thus along the rotational axis between the partial area 31b and the partial area T1, and the ball 28 is arranged in the partial area 34a and thus along the rotational axis between the partial area 34a and the partial area T2.
[0056] In the fourth rotational position P, the ball 27 is pressed against the partial area T1 along the rotational axis by means of the projection 30b, whereby the partial area T1 is compressed along the rotational axis. The clutch 24 is thus closed. In the fourth rotational position P, the ball 28 is pressed against the partial area T2 along the rotational axis by means of the projection 33b, whereby the partial area T2 is compressed along the rotational axis. Thus, in the fourth rotational position P, the clutches 24 and 25 are closed simultaneously. It can be seen that in the third rotational position N, the ball 27 is arranged in the partial area 31b and the ball 28 is arranged in the partial area 34a, so that, viewed along the rotational axis, the ball 27 is arranged between the partial area T1 and the partial area 31b and the ball 28 is arranged between the partial area 34a and the partial area T2.In the fourth rotational position P, the ball 27 is arranged, viewed along the rotational axis, between the partial region T1 and the projection 30b, with the ball 27 being arranged on the projection 30b. In the fourth rotational position P, the ball 28 is arranged on the projection 33b, so that the ball 28 is arranged along the rotational axis between the partial region T2 and the projection 33b.
[0057] From Fig. 1 it can be seen that in the embodiment shown in Fig. 1, the machine rotation axis 9 coincides with the rotation axis, so that the electric machine 6, in particular the rotor 8, is arranged coaxially with the planetary gear set 15 and the actuating element 35. List of reference symbols
[0058] Gearbox
[0059] Vehicle axle
[0060] vehicle wheel
[0061] vehicle wheel drive device electric machine
[0062] stator
[0063] rotor
[0064] Machine rotation axis
[0065] drive
[0066] downforce
[0067] input shaft
[0068] Output shaft housing planetary gear set
[0069] sun gear
[0070] ring gear
[0071] ring gear
[0072] planet carrier
[0073] planetary gear
[0074] Gearing
[0075] Gearing Element rotation axis Coupling Coupling
[0076] Actuating device
[0077] Bullet
[0078] Ball ac Ramp a, b Projection a, b Partial area a, b Ramp a, b Projection a Partial area 35 Actuating element,
[0079] 36 Actuating axis of rotation,
[0080] G1 first rotation position
[0081] G2 second rotation position
[0082] N third rotation position
[0083] P fourth rotation position
[0084] S1 first page
[0085] S2 second page
[0086] T1 first section
[0087] T2 second section
Claims
Patent claims 1. A transmission (1) for a motor vehicle, comprising at least one first transmission element (17) which is rotatable about an element rotation axis (23) relative to a housing (14) of the transmission (1), comprising at least one second transmission element (14) provided in addition to the first transmission element (17), comprising at least one clutch (24) which can be switched between a coupled state, in which the first transmission element (17) is connected in a rotationally fixed manner to the second transmission element (14) by means of the clutch (14), and a decoupling state, in which the first transmission element (17) is rotatable about the element rotation axis (23) relative to the second transmission element (14), wherein the clutch (24) can be switched from the decoupling state to the coupled state by compressing at least a partial region (T1) of the clutch (24) along the element rotation axis (23), and comprising an actuating device (26),by means of which the partial region (T1) of the coupling can be compressed along the element rotation axis (23), whereby the coupling (24) can be switched from the uncoupling state to the coupling state, characterized in that the actuating device comprises: - at least ball (27); - an actuating element (35) provided in addition to the first gear element (17) and in addition to the second gear element (14), which actuating element (35) is rotatable about an actuating axis of rotation (36) relative to the first gear element (17) and relative to the second gear element (14) and has at least one actuating ramp (29a) on which the ball (27) arranged along the element axis of rotation (23) between the partial region (T1) of the coupling (24) and the actuating element (35) can roll; and - an actuator (37) by means of which the actuating element (35) can be driven and thereby rotated about the actuating axis of rotation (36) while the ball (27) rolls on the actuating ramp (29a), whereby the ball (27) can be pressed at least indirectly against the partial area (T1) along the element axis of rotation (23) and thereby the partial area (T1) can be compressed along the element axis of rotation (23) via the ball (27).
2. Transmission (1) according to claim 1, characterized in that the first transmission element (17) is a gear.
3. Gearbox (1) according to claim 1 or 2, characterized in that the second gear element (14) is a gear or the housing (14).
4. Transmission (1) according to one of the preceding claims, characterized in that the transmission (1) has a planetary gear set (15) with at least one ring gear (17) as the first planetary element, at least one sun gear (16) as the second planetary element and at least one planet carrier (19) as the third planetary element, wherein the first transmission element (17) is one of the planetary elements 5. Gearbox (1) according to one of the preceding claims, characterized in that the actuating axis of rotation (36) coincides with the element axis of rotation (23).
6. Transmission (1) according to one of the preceding claims, characterized in that: - the transmission (1) has a third transmission element (18) provided in addition to the first transmission element (17) and in addition to the second transmission element (14), which is rotatable about the element rotation axis (23) relative to the first transmission element (17) and relative to the second transmission element (14); - the transmission (1) has a second clutch (25) provided in addition to the clutch (24), which can be switched between a second coupling state, in which the third transmission element (18) is connected to the second transmission element (14) in a rotationally fixed manner by means of the second clutch (25), and a second decoupling state, in which the third transmission element (18) is rotatable about the element rotation axis (23) relative to the second transmission element (14), wherein the second clutch (25) is actuated by pressing together at least a second partial area (T2) along the element rotation axis (23) the second clutch (25) can be switched from the second uncoupling state to the second coupling state; - the ball (27) and the actuating ramp (29a) are arranged on a first side (S1) of the actuating element (35) facing the first partial region (T1) of the first coupling (24) along the element rotation axis (23); - the actuating device (26) has at least one second ball (28) which is arranged on a second side (S2) of the actuating element (35) facing away from the first partial region (T1), from the first ball (27) and from the first side (S1) along the element rotation axis (23) and facing the second partial region (T2) of the second coupling (25) along the element rotation axis (23); - the actuating element (35) has at least one second actuating ramp (32a) arranged on the second side (S2) of the actuating element (35), on which ramp the second ball (28) arranged along the element rotation axis (23) between the second partial region (T2) of the second coupling (25) and the actuating element (35) can roll, wherein the actuating element (35) can be driven by means of the actuator (37) and can thereby be rotated about the actuating axis of rotation (36) with the second ball (28) rolling on the second actuating ramp (32a), whereby the second ball (28) can be pressed at least indirectly against the second partial region (T2) along the element rotation axis (23) and the second partial region (T2) can thereby be compressed along the element rotation axis (23) via the second ball (28).
7. Gearbox (1) according to claim 6, characterized in that the actuating element (35) is designed to press the first ball (27) along the element rotation axis (23) at least indirectly against the first partial area (T1) and at the same time to press the second ball (28) along the element rotation axis (23) at least indirectly against the second partial area (T2) in at least one first rotation position (P) of the actuating element (37), as a result of which the clutches (24, 25) are simultaneously in the coupling states in the at least one first rotation position (P).
8. Transmission (1) according to claim 6 or 7, characterized in that the actuating element (35) is designed to press the first ball (27) along the element rotation axis (23) at least indirectly against the first partial region (T1) in at least one second rotational position (G2) of the actuating element (35), while at the same time pressing the second ball (28) along the element rotation axis (23) against the second partial region (T2) does not occur, as a result of which in the at least one second rotational position (G2) the first clutch (24) is in the first coupling state and at the same time the second clutch (25) is in the second uncoupling state.
9. Gearbox (1) according to one of claims 6 to 8, characterized in that the actuating element (35) is designed to press the second ball (28) along the element rotation axis (23) at least indirectly against the second partial region (T2) in at least one third rotational position (G1) of the actuating element (35), while at the same time pressing the first ball (27) along the element rotation axis (23) against the first partial region (T1) is omitted, as a result of which in the at least one third rotational position (G1) the second clutch (25) is in the second coupling state and at the same time the first clutch (24) is in the first decoupling state.
10. Motor vehicle, with at least one transmission (1) according to one of the preceding claims, and with at least one drive device (6) by means of which the motor vehicle can be driven via the transmission (1).