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

A device (4) for actuating a component mounted to rotate on a shaft (3), the device comprising:

• an engaging device (4A, 4B) that is axially movable along the shaft (3) within a slot (10B) in the shaft (3) by at least one electric actuator (5, 17) between at least first and second axial positions;
• the component has a profile and is spaced from the shaft (3);
• the engaging device (4A, 4B) comprises a profile and extends radially through the slot (10B) in the shaft (3) and, in the first axial position, the profile of the engaging device (4A, 4B) is located within the component, and the profile of the engaging device (4A, 4B) engages the profile of the component such that the component is rotationally fixed to the shaft (3);
• in the second axial position of the electric actuator (5, 17), the profile of the engaging device (4A, 4B) is disengaged from the profile of the component;
• the at least one electric actuator (5, 17) is arranged at least partially inside and coaxially with the shaft (3);
• wherein an electrically controlled brake communicates with the actuator to maintain a shift status of the component by preventing a change of the shift status of the component when the actuator is not energized.

A device (4) for engaging a gear wheel (3A, 3B, 3C, 3D) to a hollow transmission shaft (3) such that the gear wheel and the hollow shaft are nonrotatable with respect to each other, and the gear wheel (3A, 3B, 3C, 3D), in a disengaged state, being freely rotationally supported by the hollow shaft (3), the device comprising:

• an electric actuator (5, 17) is coaxially aligned with the hollow shaft (3) and located within an interior of the hollow shaft (3), the electric actuator (5, 17) rotationally actuates a spindle (8A) which engages a nut (8B), the nut (8B) is axially slidable and rotationally fixed with respect to the shaft such that the nut (8B) is axially biased within the interior of the hollow shaft (3) by rotation of the spindle (8A);
• a first end of pins (9A, 9B) are immovably fixed to the nut (8B) and radially extend through slots (10A, 10B) in the hollow shaft (3);
• a second opposite end of the pins is statically connected to a sleeve (11), (11) is rotationally fixed to the hollow shaft (3) and axially slidable thereon, the first end of the pins (9A, 9B) are fixed to the nut (8B) within the interior of the hollow shaft (3), such that as the nut (8B) is axially driven within the hollow shaft by rotation of the spindle (8A);
• and
• the sleeve (11) is axially slidable along the hollow shaft (3) radially between the gear wheel (3A, 3B, 3C, 3D) and the hollow shaft (3) such that in a first position, a radially exterior profile of the sleeve (11) engages a radially interior profile of the gear wheel (3A, 3B, 3C, 3D).