The invention regards a device for the selection and the displacement of actuation members of a gearbox for motor vehicles that comprises a plurality of forward gear ratios and a reverse gear ratio, each associated to a respective actuation member. The device includes a mechanism for the assistance to the engagement of the reverse gear.

The invention regards a device for the selection and the displacement of actuation members of a gearbox for motor vehicles that comprises a plurality of forward gear ratios and a reverse gear ratio, each associated to a respective actuation member. The device includes a mechanism for the assistance to the engagement of the reverse gear.

A transfer case having a shift mechanism. The shift mechanism may include a shift rail, a range shift assembly, a mode shift assembly, and a sector cam. The sector cam may control movement of the range shift assembly and the mode shift assembly when the sector cam is rotated.

A transfer case having a shift mechanism. The shift mechanism may include a shift rail, a range shift assembly, a mode shift assembly, and a sector cam. The sector cam may control movement of the range shift assembly and the mode shift assembly when the sector cam is rotated.

A vehicle transfer case is provided including input and output shafts mounted within a housing, a secondary shaft selectively driven by the output shaft, a first hub having an inner diameter splined section having a first extreme neutral position with exclusive torsional engagement with the output shaft, and in a second intermediate high position having torsional engagement with the output shaft and input shafts, and in a third extreme low position having exclusive torsional engagement with the input shaft. A second hub is provided, rotatably mounted on the first hub and axially fixed therewith. The second hub is torsionally fixed to the output shaft, and a shift fork is provided to translate the second hub. A planetary gear set is provided, having a ring gear, a plurality of planet gears connected to each other by a carrier and a sun gear; and wherein in the extreme neutral position the output shaft is disengaged from the input shaft, and in the second intermediate position the input shaft is directly connected to the output shaft without rotating the planetary gear set, and in the extreme third position the first hub torsionally connects the input shaft to the sun gear, and the second hub is connected with the carrier.

A vehicle transfer case is provided including input and output shafts mounted within a housing, a secondary shaft selectively driven by the output shaft, a first hub having an inner diameter splined section having a first extreme neutral position with exclusive torsional engagement with the output shaft, and in a second intermediate high position having torsional engagement with the output shaft and input shafts, and in a third extreme low position having exclusive torsional engagement with the input shaft. A second hub is provided, rotatably mounted on the first hub and axially fixed therewith. The second hub is torsionally fixed to the output shaft, and a shift fork is provided to translate the second hub. A planetary gear set is provided, having a ring gear, a plurality of planet gears connected to each other by a carrier and a sun gear; and wherein in the extreme neutral position the output shaft is disengaged from the input shaft, and in the second intermediate position the input shaft is directly connected to the output shaft without rotating the planetary gear set, and in the extreme third position the first hub torsionally connects the input shaft to the sun gear, and the second hub is connected with the carrier.

A driveline component includes a first plate and a second plate. A motor is engaged with the first plate. The first plate and the second plate include ramped grooves that ramp toward the other of the first plate and the second plate. Balls are disposed between the first plate and the second plate and are engaged with the ramped grooves. A shifter is engaged with the second plate. Relative rotation of the first plate and the second plate causes the balls in the ramped grooves to move the first plate and the second plate axially relative to each other. This relative rotation may be used to make one type of mode selection, and operation of the shifter by the second plate may be used to make another type of mode selection. This allows the single motor to make both selections.

A driveline component includes a first plate and a second plate. A motor is engaged with the first plate. The first plate and the second plate include ramped grooves that ramp toward the other of the first plate and the second plate. Balls are disposed between the first plate and the second plate and are engaged with the ramped grooves. A shifter is engaged with the second plate. Relative rotation of the first plate and the second plate causes the balls in the ramped grooves to move the first plate and the second plate axially relative to each other. This relative rotation may be used to make one type of mode selection, and operation of the shifter by the second plate may be used to make another type of mode selection. This allows the single motor to make both selections.

A power split transmission structure has at least three interfaces to direct driving power from a drive to at least one output in order to supply the driving power to connected consumers. It comprises at least two variator paths which each comprise a summation gearbox communicating with an electric or hydraulic machine via a mechanical and a non-mechanical path in order to modify torque, speed or both of the driving power. A control device regulates the summation gearbox of each of the variator paths. A power electronics system or hydraulic control device is connected to the electric or hydraulic machine of each of the variator paths. The transmission structure directs the driving power via the variator paths such that the electric or hydraulic machine of each variator path is operable in a generator or motor mode in order to compensate for a power shortfall or a power oversupply at at least one outlet of the transmission structure.

A power split transmission structure has at least three interfaces to direct driving power from a drive to at least one output in order to supply the driving power to connected consumers. It comprises at least two variator paths which each comprise a summation gearbox communicating with an electric or hydraulic machine via a mechanical and a non-mechanical path in order to modify torque, speed or both of the driving power. A control device regulates the summation gearbox of each of the variator paths. A power electronics system or hydraulic control device is connected to the electric or hydraulic machine of each of the variator paths. The transmission structure directs the driving power via the variator paths such that the electric or hydraulic machine of each variator path is operable in a generator or motor mode in order to compensate for a power shortfall or a power oversupply at at least one outlet of the transmission structure.