Drive train comprising an actuating assembly and a coupling device for coupling an output shaft to a drive and for actuating a parking lock

A method for sequentially actuating a first claw clutch and a second claw clutch for a non-rotatable coupling of a drive wheel via a parking lock unit arranged within a drive train, the drive train comprising an actuating device configured for:

• i) actuating a coupling device for coupling at least one drive wheel to a drive motor, and ii) coupling the at least one drive wheel to a parking lock unit, and
• the coupling device comprises a shifting sleeve configured to be axially displaced via the actuating device,
• the drive motor has a first torque interface which, in a neutral position of the shifting sleeve, is coupled to a second torque interface of the shifting sleeve—,
• the drive wheel has a connecting element which comprises a third torque interface to which the second torque interface of the shifting sleeve is coupled in a first axial position,
• the second torque interface of the shifting sleeve has an axial extension so that in the first axial position of the shifting sleeve, the second torque interface of the shifting sleeve configured for torque transmission from the drive motor to the drive wheel is coupled both to the first torque interface of the drive motor and to the third torque interface of the drive wheel,
• the parking lock unit has a fourth torque interface coupled with the second torque interface of the shifting sleeve in a second axial position of the shifting sleeve,
• the axial extension of the second torque interface is configured such that, in the second axial position of the shifting sleeve, the second torque interface of the shifting sleeve is coupled for torque transmission both to the fourth torque interface of the parking lock unit and to the third torque interface of the drive wheel, and
• the axial extension is configured such that at no time is the second torque interface of the shifting sleeve coupled both to the fourth torque interface of the parking lock unit and to the first torque interface of the drive motor,
• wherein the actuating device further comprises an actuator drive, a shifting element and an actuating element coupled to the actuator drive,
• wherein the shifting element is coupled to the shifting sleeve and to the actuating element for axially displacing the shifting sleeve,
• wherein at least one of coupling of the shifting element to the shifting sleeve or coupling of the shifting element to the actuating element is enabled via a spring element,
• wherein the second claw clutch of the parking lock unit is configured to be actuated via a first displacement sensor when the first displacement sensor detects the shifting element in a second shifting position, and the first claw clutch configured for coupling the drive wheel to the drive motor is actuated when a second displacement sensor detects the shifting sleeve in a first position or the first displacement sensor detects the shifting element in a third shifting position.

A drive train of a motor vehicle, comprising an actuating device configured for:

• i) actuating a coupling device for coupling at least one drive wheel to a drive motor, and ii) coupling the at least one drive wheel to a parking lock unit, and
• the coupling device comprises a shifting sleeve configured to be axially displaced via the actuating device, the shifting sleeve springably supported by a spring and configured with inner toothing having an axial extension, and
• the drive motor has an output gear with outer toothing,
• the drive wheel has a drive gear with outer toothing,
• the parking lock unit has a fixed gear with outer toothing, and
• in a neutral position of the shifting sleeve, the outer toothing of the output gear is coupled to the inner toothing of the shifting sleeve,
• in a first axial position of the shifting sleeve, the outer toothing of the drive gear is coupled to the inner toothing of the shifting sleeve, and
• in a second axial position of the shifting sleeve, the inner toothing of the shifting sleeve is:
• i) coupled to both the outer toothing of the fixed gear and the outer toothing of the drive gear, and ii) disengaged with the output toothing of the output gear,
• wherein the spring remains in a same preload state when the shifting sleeve is in the neutral position, the first axial position, and the second axial position.