Device for actuating a process executed as a loose gear of a transmission device

There is described a device (2) for actuating a gear designed as a loose wheel (4 to 7) of a Getriebeinrichtung (1). The gear (4 to 7) is rotatably mounted on a shaft (3) and arranged on at least one of an at least partially inside the shaft (3) and a fluidic pressure medium operated actuator (10, 22) comprising switch-on device (8, 9) can be converted into a the connected state at which the gear (4 to 7) non-rotatably connected with the shaft (3). The gear (4 to 7) can be acted upon from the inside of the shaft (3) out of the time required for switching on or off actuating force. According to the invention the at least one actuator (10, 22) is designed as a piston-cylinder unit or as a motor which is connected for rotation with the shaft (3) or relative to the shaft (3) rotatably carried out, wherein the operative connection between the the actuator (10, 22) and the actuated gear (4 to 7) in relation to the shaft (3) rotationally fixed version of the actuator (10, 22) with a speed decoupling between the actuator (10, 22) and the shaft (3 executed ) is executed.