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EP-4735773-A1 - TRANSMISSION FOR A MOTOR VEHICLE, AND MOTOR VEHICLE COMPRISING SUCH A TRANSMISSION

EP4735773A1EP 4735773 A1EP4735773 A1EP 4735773A1EP-4735773-A1

Abstract

The invention relates to a transmission (1) for a motor vehicle, with at least one first transmission element (17) which can be rotated about an element rotational axis (23) relative to a housing (14) of the transmission (1), with at least one second transmission element (14) which is provided in addition to the first transmission element (17), with at least one clutch (24) which can be shifted between a coupled state, in which the first transmission element (17) is fixedly connected to the second transmission element (14) by means of the clutch (14) for conjoint rotation, and a decoupled state, in which the first transmission element (17) can be rotated about the element rotational axis (23) relative to the second transmission element (14), wherein the clutch (24) can be shifted from the decoupled state into the coupled state when at least one portion (T1) of the clutch (24) is compressed along the element rotational axis (23), and with an actuating means (26) by means of which the portion (T1) of the clutch can be compressed along the element rotational axis (23), as a result of which the clutch (24) can be shifted from the decoupled state into the coupled state.

Inventors

  • Illenberger, Christopher Martin
  • Boeswirth, Martin
  • Mileti, Marco

Assignees

  • Bayerische Motoren Werke Aktiengesellschaft

Dates

Publication Date
20260506
Application Date
20240527

Claims (10)

  1. 1. Gearbox (1) for a motor vehicle, with at least one first gear element (17) which is rotatable about an element axis of rotation (23) relative to a housing (14) of the gear box (1), with at least one second gear element (14) provided in addition to the first gear element (17), with at least one clutch (24) which can be switched between a coupling state in which the first gear element (17) is connected to the second gear element (14) in a rotationally fixed manner by means of the clutch (14), and a decoupling state in which the first gear element (17) is rotatable about the element axis of rotation (23) relative to the second gear element (14), wherein the clutch (24) can be switched from the decoupling state to the coupling state by pressing at least a partial area (T1) of the clutch (24) together along the element axis of rotation (23), and with an actuating device (26) by means of which the partial area (T1) of the clutch along the element axis of rotation (23) can be compressed, whereby the clutch (24) can be switched from the uncoupled state to the coupled 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 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 along the actuating ramp (29a), whereby the ball (27) can be pressed at least indirectly against the partial region (T1) along the element axis of rotation (23) and thereby the partial region (T1) can be compressed along the element axis of rotation (23) via the ball (27).
  2. 2. Transmission (1) according to claim 1, characterized in that the first transmission element (17) is a gear.
  3. 3. Transmission (1) according to claim 1 or 2, characterized in that the second transmission element (14) is a gear or the housing (14).
  4. 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. 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. 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 region (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 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) while the second ball (28) rolls 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. 7. Transmission (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 region (T1) and simultaneously 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 first rotation position (P) of the actuating element (37), whereby the clutches (24, 25) are simultaneously in the coupling states in the at least one first rotation position (P).
  8. 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 the second ball (28) is not pressed along the element rotation axis (23) against the second partial region (T2), 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. 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 avoided, 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 uncoupling state.
  10. 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).

Description

Transmission for a motor vehicle and motor vehicle with such a transmission 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. EP 2 791 530 B1 discloses an electrical machine with a stator and a rotor as well as a clutch device and an actuating device which are integrated into the rotor. It is provided that the actuating device has an epicyclic gear with a ring gear, a sun gear, planetary gears and a web. 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. 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. A first aspect of the invention relates to a transmission, also referred to as a transmission device or transmission mechanism, for a motor vehicle, also referred to simply 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 one first transmission element, which can be rotated 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 coupling device or coupling device, which is also referred to as the first clutch. When the clutch is mentioned above and below, this means the first clutch, unless otherwise stated. understand. The clutch can be switched, i.e. adjusted, between a coupling state, which is also referred to as the first coupling state, and an uncoupling state, which is also referred to as the first uncoupling state. When the coupling state is mentioned above and below, this means the first coupling state unless otherwise stated, and when the uncoupling state is mentioned above and below, this means the first uncoupling state unless otherwise stated. In the coupling state, the first gear element is connected to the second gear element in a rotationally fixed manner by means of the clutch, so that relative rotations about the element axis of rotation between the first gear element and the second gear element are prevented, i.e. avoided. In the uncoupling state, the first gear element can rotate about the element axis of rotation relative to the second gear element. This means that in the uncoupling state, the clutch allows relative rotations about the element axis of rotation between the first gear element and the second gear element. 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 rotation axis and can be held in the coupled state, for example. When the partial area is mentioned above and below, 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 disks, of the first clutch, whereby when the clutch disks or the clutch disk are mentioned above and below, this means the first clutch disks or the first clutch disks of the first clutch. For example, the respective first clutch disk is a respective first clutch plate, in particular a respective first friction plate, so that the first clutch is designed, for example, 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 locked manner using the first clutch. For example, the clutch discs form a first clutch pack, in particular a first disk pack, whereby 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 rotation axis. The first partial area of the first clutch, that is For example, the first clutch pack is pressed together along the element rotation axis by exerting a first force on the first partial region, wherein the first force, in particular its direction of action, runs parallel to the element rotation axis or coincides with the element rotation axis. The transmission also has an actuating device by means of which the partial area of the clutch can be pressed together along the element rotation axis