Device for actuating a gearwheel, which is designed as a loose wheel, of a transmission device

A device (2) for actuating a loose gearwheel (4 to 7) of a transmission device (1), the device (2) comprising:

• at least one engagement mechanism (8, 9) which shifts the gearwheel (4 to 7) between a state in which the gearwheel (4 to 7) is engaged with a shaft (3) and a state in which the gearwheel (4 to 7) is rotatable with respect to the shaft (3), the at least one engagement mechanism (8, 9) comprises at least one actuator (10, 22) which is arranged at least partially inside the shaft (3) and actuated by a pressure medium to engage the gearwheel (4 to 7) with the shaft (3), an actuation force from the at least one actuator (10, 22) being exerted on the gearwheel (4 to 7), from inside of the shaft (3) outwardly, to either engage the gearwheel (4 to 7) with the shaft (3) or to disengage the gearwheel (4 to 7) from the shaft (3), and the at least one actuator (10, 22) being a piston-cylinder unit accommodated completely inside the shaft (3) and rotationally fixed within the shaft (3).

A device (2) for actuating a loose gearwheel (4 to 7) of a transmission device (1), the device (2) comprising:

• at least one engagement mechanism (8, 9) which shifts the gearwheel (4 to 7) between a state in which the gearwheel (4 to 7) is engaged with a shaft (3) and a state in which the gearwheel (4 to 7) is disengaged from and rotatable with respect to the shaft (3), the at least one engagement mechanism (8, 9) comprises at least one actuator (10, 22), which is arranged at least partially inside the shaft (3) and which is actuated by a pressure medium to rotationally engage the gearwheel (4 to 7) to the shaft (3), an actuation force from the at least one actuator (10, 22) is exerted on the gearwheel (4 to 7) from inside of the shaft (3) outwardly to either rotationally engage the gearwheel (4 to 7) to the shaft (3) or rotationally disengage the gearwheel (4 to 7) from the shaft (3), the at least one actuator (10, 22) is a motor that is rotationally fixed to the shaft (3) and is accommodated completely inside the shaft (3), and an active connection between an output shaft (11, 30) of the motor and the gearwheel (4 to 7) to be actuated is with rotational drive decoupling means between the output shaft (11, 30) and the shaft (3).

A device (2) for actuating a loose gearwheel (4 to 7) of a transmission device (1), the device (2) comprising:

• at least one engagement mechanism (8, 9) which shifts the gearwheel (4 to 7) between a state in which the gearwheel (4 to 7) is engaged with a shaft (3) and a state in which the gearwheel (4 to 7) is disengage from and rotatable with respect to the shaft (3), the at least one engagement mechanism (8, 9) comprises at least one actuator (10, 22), which is arranged at least partially inside the shaft (3) and which is actuated by a pressure medium to rotationally engage the gearwheel (4 to 7) to the shaft (3), an actuation force from the at least one actuator (10, 22) is exerted on the gearwheel (4 to 7) from inside of the shaft (3) outwardly to either rotationally engage the gearwheel (4 to 7) to the shaft (3) or rotationally disengage the gearwheel (4 to 7) from the shaft (3), the at least one actuator (10, 22) is a motor that is rotationally fixed relative to the shaft (3) and is accommodated inside the shaft (3), and an active connection between a motor output shaft of the motor and the gearwheel to be actuated is made with rotational drive decoupling means between the motor output shaft and the shaft.

A device (2) for actuating a loose gearwheel (4 to 7) of a transmission device (1), the device (2) comprising:

• at least one engagement mechanism (8, 9) which shifts the gearwheel (4 to 7) between a state in which the gearwheel (4 to 7) is rotationally engaged to a shaft (3) and a state in which the gearwheel (4 to 7) is rotationally disengaged from the shaft (3), the at least one engagement mechanism (8, 9) comprises at least one actuator (10, 22) being arranged at least partially inside the shaft (3) and actuated by a pressure medium for engaging the gearwheel (4 to 7) with the shaft (3), an actuation force from the at least one actuator (10, 22) being exerted on the gearwheel (4 to 7) from inside of the shaft (3) outwardly for either engaging the gearwheel (4 to 7) with the shaft (3) or disengaging the gearwheel (4 to 7) from the shaft (3), the at least one actuator (10, 22) being a piston-cylinder unit accommodated inside the shaft (3) and being rotationally fixed relative to the shaft (3), and an active connection between a piston rod (35, 36) of the piston-cylinder unit (10, 22) and the gearwheel (4 to 7) to be actuated being achieved by rotational drive decoupling means between the piston rod (35, 36) and the shaft (3).