Some embodiments are directed to a gearing assembly including a rotary input member, a rotary output member and a gearing arrangement between the input member and the output member selectively engageable to effect a driving engagement between the input member and the output member through at least a first torque connection having a first gear ratio and a second torque connection having a second gear ratio. One of the rotary input member and the rotary output member includes a first shaft and the first torque connection includes a first dog clutch including a dog hub having a hub set of teeth and a surrounding dog ring including a ring set of teeth. The hub and ring sets of teeth are radially projecting and mutually engageable. The dog hub is mounted on the first shaft so as to allow axial movement of the dog hub relative to the shaft.

A transmission for a motor vehicle is provided. The transmission has a hydraulically or electrically operable gearshift sleeve, a clutch pack, an input shaft, and an output shaft, a gearshift sleeve, a gearshift sleeve claw, and an opposing output claw associated with the output shaft. The gearshift sleeve can be moved from an initial position into a first position, in which the gearshift sleeve transfers an axial force by way of the first ramp element and the second ramp element to the clutch pack for synchronization of the disks, and into a second position, in which the gearshift sleeve claw is connected to the output claw interlockingly in the direction of rotation and thus the input shaft and the output shaft are interlockingly coupled. A method for shifting such a transmission is also provided.

A transmission for a motor vehicle is provided. The transmission has a hydraulically or electrically operable gearshift sleeve, a clutch pack, an input shaft, and an output shaft, a gearshift sleeve, a gearshift sleeve claw, and an opposing output claw associated with the output shaft. The gearshift sleeve can be moved from an initial position into a first position, in which the gearshift sleeve transfers an axial force by way of the first ramp element and the second ramp element to the clutch pack for synchronization of the disks, and into a second position, in which the gearshift sleeve claw is connected to the output claw interlockingly in the direction of rotation and thus the input shaft and the output shaft are interlockingly coupled. A method for shifting such a transmission is also provided.

A combination starter-generator device includes an electric machine and a gear set configured to couple the electric machine and the engine in first and second power flow directions. The gear set is configured to operate in one of at least a first mode, a second mode, or a third mode in the first power flow direction and at least a fourth mode in the second power flow direction. The starter-generator device includes a clutch arrangement with at least one clutch selectively coupled to the gear set to effect the first, second, and third mode in the first power flow direction and the fourth mode in the second power flow direction; and a cam plate configured to shift the at least one clutch between a disengaged position and an engaged position relative to the gear set.

The invention provides a gearing assembly (5) comprising a rotary input member (1b), a rotary output member (3) and a gearing arrangement (52) between the input member and the output member selectively engageable to effect a driving engagement between the input member and the output member through at least a first torque connection having a first gear ratio and a second torque connection having a second gear ratio. One of the rotary input member and the rotary output member comprises a first shaft and the first torque connection comprises a first dog clutch comprising a dog hub (51) comprising a hub set of teeth (51a) and a surrounding dog ring (53) comprising a ring set of teeth (53a), the hub and ring sets of teeth being radially projecting and mutually engageable, the dog hub being mounted on the first shaft so as to allow axial movement of the dog hub relative to the shaft and dog ring with rotation of the dog hub relative to the shaft being resisted such that when the dog hub is axially aligned with the dog ring, the hub and ring sets of teeth engage and rotational drive may be transferred between the first shaft and the dog ring. The hub and ring sets of teeth are dimensioned and spaced so that upon axial movement between the dog hub and the dog ring with the sets of teeth appropriately in register with one another, the teeth in each set may pass through spacings between the teeth in the respective other set, so that the dog hub is moveable between a first disengaged position with the hub set of teeth axially spaced in a first direction from the ring set of teeth, a first engaged position with the hub set of teeth aligned and engaged with the ring set of teeth, and a second disengaged position with the hub set of teeth axially spaced in a second direction from the ring set of teeth.

A clutch claw applied to a clutch structure having a rotating shaft includes a claw portion, a base portion and at least two elastic portions. The base portion is opposite to the claw portion and has a peripheral edge. The claw portion and the base portion are coaxially disposed on the rotating shaft. Each elastic portion is at least partly disposed around part of the claw portion to provide elastic force. Each elastic portion has a first end and a second end. The first end is connected with the base portion and extended from the peripheral edge, the second end is connected with the claw portion, and there is at least one bent section between the first end and the second end. Therefore, the collision damage is prevented, and the impact and friction generated when the clutch claw is instantaneously rotated is avoided, thereby achieving the advantage of reducing noise.

A clutch claw applied to a clutch structure having a rotating shaft includes a claw portion, a base portion and at least two elastic portions. The base portion is opposite to the claw portion and has a peripheral edge. The claw portion and the base portion are coaxially disposed on the rotating shaft. Each elastic portion is at least partly disposed around part of the claw portion to provide elastic force. Each elastic portion has a first end and a second end. The first end is connected with the base portion and extended from the peripheral edge, the second end is connected with the claw portion, and there is at least one bent section between the first end and the second end. Therefore, the collision damage is prevented, and the impact and friction generated when the clutch claw is instantaneously rotated is avoided, thereby achieving the advantage of reducing noise.

A combination starter-generator device includes an electric machine and a gear set configured to couple the electric machine and the engine in first and second power flow directions. The gear set is configured to operate in one of at least a first mode, a second mode, or a third mode in the first power flow direction and at least a fourth mode in the second power flow direction. The starter-generator device includes a clutch arrangement with at least one clutch selectively coupled to the gear set to effect the first, second, and third mode in the first power flow direction and the fourth mode in the second power flow direction; and a cam plate configured to shift the at least one clutch between a disengaged position and an engaged position relative to the gear set.

A clutch claw applied to a clutch structure having a rotating shaft includes a claw portion, a base portion and at least two elastic portions. The base portion is opposite to the claw portion and has a peripheral edge. The claw portion and the base portion are coaxially disposed on the rotating shaft. Each elastic portion is at least partly disposed around part of the claw portion to provide elastic force. Each elastic portion has a first end and a second end. The first end is connected with the base portion and extended from the peripheral edge, the second end is connected with the claw portion, and there is at least one bent section between the first end and the second end. Therefore, the collision damage is prevented, and the impact and friction generated when the clutch claw is instantaneously rotated is avoided, thereby achieving the advantage of reducing noise.

A clutch claw applied to a clutch structure having a rotating shaft includes a claw portion, a base portion and at least two elastic portions. The base portion is opposite to the claw portion and has a peripheral edge. The claw portion and the base portion are coaxially disposed on the rotating shaft. Each elastic portion is at least partly disposed around part of the claw portion to provide elastic force. Each elastic portion has a first end and a second end. The first end is connected with the base portion and extended from the peripheral edge, the second end is connected with the claw portion, and there is at least one bent section between the first end and the second end. Therefore, the collision damage is prevented, and the impact and friction generated when the clutch claw is instantaneously rotated is avoided, thereby achieving the advantage of reducing noise.