A hybrid transmission device (3) includes at least one electric motor (EM1, EM2), a first transmission input shaft (7), and a second transmission input shaft (9) mounted on the first transmission input shaft (7). A connecting clutch (K3) is configured for rotationally fixedly connecting the first transmission input shaft (7) and the second transmission input shaft (9). The second transmission input shaft (9) includes an end (11) facing toward the outer side of the hybrid transmission device (3) and an end (13) facing toward the inner side of the hybrid transmission device (3). The connecting clutch (K3) is arranged at the end (13) of the second transmission input shaft (9) facing toward the inner side of the hybrid transmission device (3).

A hybrid transmission device (3) includes at least one electric motor (EM1, EM2), a first transmission input shaft (7), and a second transmission input shaft (9) mounted on the first transmission input shaft (7). A connecting clutch (K3) is configured for rotationally fixedly connecting the first transmission input shaft (7) and the second transmission input shaft (9). The second transmission input shaft (9) includes an end (11) facing toward the outer side of the hybrid transmission device (3) and an end (13) facing toward the inner side of the hybrid transmission device (3). The connecting clutch (K3) is arranged at the end (13) of the second transmission input shaft (9) facing toward the inner side of the hybrid transmission device (3).

The present invention relates to a two-stage transmission for an electrically driven vehicle including a dog clutch and a friction clutch, and an object of the present invention is to prevent a torque drop when shifting gears. The two-stage transmission for the electrically driven vehicle includes a planetary gear mechanism (12), a dog clutch (28), a friction clutch (30), an armature (26) to switch between the dog clutch (28) and the friction clutch (30), and an electromagnetic coil (31) to drive the armature (26). In the dog clutch (28) and the friction clutch (30), the coupling relationship among the rotational elements of the planetary gear mechanism (12) is set such that the dog clutch (28) is fastened and the friction clutch (30) is not fastened in speed reduction (the first speed), and the dog clutch (28) is not fastened and the friction clutch (30) is fastened in speed increase (the second speed). To prevent the torque drop when shifting the gears, a ratchet-type one-way clutch (50) is disposed such that a rotational phase position of the ratchet-type one-way clutch (50) is coincident with that of the dog clutch (28). When shifting from the second speed to the first speed, since the rotational phase of the dog clutch (28) is adjusted by the ratchet-type one-way clutch (50), the shifting is instantaneously completed without waiting operation for the phase adjustment, resulting in preventing a transmission shock.

The present invention relates to a two-stage transmission for an electrically driven vehicle including a dog clutch and a friction clutch, and an object of the present invention is to prevent a torque drop when shifting gears. The two-stage transmission for the electrically driven vehicle includes a planetary gear mechanism (12), a dog clutch (28), a friction clutch (30), an armature (26) to switch between the dog clutch (28) and the friction clutch (30), and an electromagnetic coil (31) to drive the armature (26). In the dog clutch (28) and the friction clutch (30), the coupling relationship among the rotational elements of the planetary gear mechanism (12) is set such that the dog clutch (28) is fastened and the friction clutch (30) is not fastened in speed reduction (the first speed), and the dog clutch (28) is not fastened and the friction clutch (30) is fastened in speed increase (the second speed). To prevent the torque drop when shifting the gears, a ratchet-type one-way clutch (50) is disposed such that a rotational phase position of the ratchet-type one-way clutch (50) is coincident with that of the dog clutch (28). When shifting from the second speed to the first speed, since the rotational phase of the dog clutch (28) is adjusted by the ratchet-type one-way clutch (50), the shifting is instantaneously completed without waiting operation for the phase adjustment, resulting in preventing a transmission shock.

A torque transmission arrangement includes a cylindrical friction element carrier and a snap-ring, the friction element carrier carries a pressing plate and a reaction plate of an outer friction-based torque-transmission mechanism rotationally secured to an outer surface and a pressing plate and a reaction plate of an inner friction-based torque-transmission mechanism rotationally secured to an inner surface. The friction element carrier includes through-holes distributed around the circumference of the friction element carrier. The snap-ring includes radial projections distributed around the inner or outer circumference of the snap-ring and configured to extend through said through-holes when the snap-ring is mounted on the friction element carrier, such that the snap-ring protrudes in a radial direction beyond both the inner and outer surfaces of the friction element carrier for retaining the inner and outer reaction plates of the inner and outer friction-based torque-transmission mechanisms on the friction element carrier.

A torque transmission arrangement includes a cylindrical friction element carrier and a snap-ring, the friction element carrier carries a pressing plate and a reaction plate of an outer friction-based torque-transmission mechanism rotationally secured to an outer surface and a pressing plate and a reaction plate of an inner friction-based torque-transmission mechanism rotationally secured to an inner surface. The friction element carrier includes through-holes distributed around the circumference of the friction element carrier. The snap-ring includes radial projections distributed around the inner or outer circumference of the snap-ring and configured to extend through said through-holes when the snap-ring is mounted on the friction element carrier, such that the snap-ring protrudes in a radial direction beyond both the inner and outer surfaces of the friction element carrier for retaining the inner and outer reaction plates of the inner and outer friction-based torque-transmission mechanisms on the friction element carrier.

A vehicle drive device includes: an electric motor; a multi-plate clutch including a plurality of clutch plates; a pressing mechanism configured to press the multi-plate clutch; an output rotary member to which a drive force of the electric motor is transferred through the multi-plate clutch; and a control device configured to control the electric motor and the pressing mechanism. The control device is configured to control the pressing mechanism using information on the result of test operation performed while the vehicle is stationary.

A vehicle drive device includes: an electric motor; a multi-plate clutch including a plurality of clutch plates; a pressing mechanism configured to press the multi-plate clutch; an output rotary member to which a drive force of the electric motor is transferred through the multi-plate clutch; and a control device configured to control the electric motor and the pressing mechanism. The control device is configured to control the pressing mechanism using information on the result of test operation performed while the vehicle is stationary.

A system includes a PTO device that selectively couples to a driveline of a vehicle, a motor/generator electrically coupled to an electrical power storage system, and a shared load selectively powered by one of the driveline or the motor/generator. The PTO device further includes a coupling actuator that couples the shared load to the motor/generator at a first selected ratio in a first position, and couples the shared load to the driveline at a second selected ratio in a second position.

A system includes a PTO device that selectively couples to a driveline of a vehicle, a motor/generator electrically coupled to an electrical power storage system, and a shared load selectively powered by one of the driveline or the motor/generator. The PTO device further includes a coupling actuator that couples the shared load to the motor/generator at a first selected ratio in a first position, and couples the shared load to the driveline at a second selected ratio in a second position.