A vehicle driving device including: a rotary electric machine that is a driving force source of a first wheel and a second wheel; a speed reduction device that reduces a speed of a rotation of the rotary electric machine; and a differential gear device that distributes to the first wheel and the second wheel, a driving force that is transmitted from the rotary electric machine via the speed reduction device.

A planetary gear mechanism has a sun gear disposed to a rotating shaft, a plurality of pinion gears, a carrier supporting the plurality of the pinion gears, a ring gear meshing with the pinion gear on the outer diameter side of the carrier and a case holding the ring gear on the outer diameter side thereof. The ring gear is slidable in the axial direction of the rotating shaft with respect to the case. The planetary gear mechanism has a load transmission member abutting to an inner diameter side end portion of the ring gear and holding the carrier and the ring gear so as to be relatively rotatable. The load transmission member transmits an axial load from the ring gear to the carrier.

An axle drive (1) for a motor vehicle axle includes at least a first drive unit (2), a second drive unit (2), and an output axle (6). The first and second drive units (2) are arranged such that an overall center of gravity (7) of the axle drive (1) is situated proximate to a center of the output axle (6) and/or an axis of rotation of a vehicle wheel of the motor vehicle driven by the axle drive (1).

A transmission unit for a hybrid motor vehicle, has a planetary gearing. The planetary gearing is fitted with a first planetary wheel set and a second planetary wheel set. The transmission unit also includes an electric machine, which is coupled with a component part of the planetary gearing, and a plurality of switching devices, each of which forming a brake or a clutch, and each being movable between an activated position and a deactivated position. The switching devices are operatively installed for switching various transmission ratios between an input, which can be coupled with an internal combustion engine, and an output, and/or between the electric machine and the output. No more than four switching devices are present for implementing at least two different transmission ratios in a drive state of the internal combustion engine, at least one transmission ratio in a drive state of the electric machine, and at least one transmission ratio in a recuperation state of the electric machine, as a result of their activated and deactivated positions.

An electric powertrain includes a first electric motor that has an uninterrupted connection with a drive shaft of a vehicle. The electric powertrain further includes a second electric motor that has an interruptible connection with the drive shaft. In one form, this interruptible connection includes a clutch. The electric powertrain further includes a first gear train in the form of a first planetary gear and a second gear train in the form of a second planetary gear. The clutch in one variation includes a positive clutch in the form of a dog clutch. The dog clutch has a clutch suspension configured to deflect a clutch collar when gearing is misaligned during shifting.

A first bearing device (68) rotatably supports a rotor shaft (30) of a motor (MG2) on a driven gear (24) side in an axial direction of the rotor shaft (30). A second bearing device (70) rotatably supports one (32) of a driven gear shaft (28) and an output shaft (32). The one (32) of the driven gear shaft (28) and the output shaft (32) is arranged radially inward of the other (28) one of the driven gear shaft (28) and the output shaft (32). A third bearing device (72) is arranged between an outer periphery of the one (32) of the driven gear shaft (28) and the output shaft (32) and an inner periphery of the rotor shaft (30) or an inner periphery of the other one (28) of the driven gear shaft (28) and the output shaft (32). The third bearing device (72) rotatably supports the one (32) of the driven gear shaft (28) and the output shaft (32).

A transmission system suitable for operation with a drive machine includes an input shaft for a drive power, at least one output shaft for outputting drive power, a power-split transmission section having at least one variable transmission branch and a mechanical transmission branch, a manual transmission, a transmission system controller, and at least one first and second electric machine for generator and motor operation. The electric machines are electrically connected to one another. The drive power is divided up and conducted by the mechanical and variable transmission branch. An input-coupled, magnetically electric epicyclic gear stage brings together the variable transmission branch and mechanical transmission branch, and is activated by the second electric machine such that the output shaft of the transmission system rotates counter to a direction of rotation at the input shaft to provide a forward and reverse operation of the transmission system.

Drive device for a motor vehicle, includes a differential for distributing a torque that can be supplied via a drive shaft to two output shafts and a superimposition gear coupled with the differential one of the output shafts and an additional motor for superimposing torques supplied from the output shaft, from the differential and from the additional motor, wherein the differential is coupled via a torque reducing transmission ratio device with the superimposition gear, wherein the superimposition gear includes a switching device that can be controlled with a control device, wherein the superimposition gear superimposes in a first switching mode torques supplied to the switching device from the output shaft.

Methods and systems for a vehicle are provided. A transmission system includes, in one example, a first planetary gear set including a first ring gear and a first sun gear, a second planetary gear set that includes a second ring gear and a second sun gear, and a third planetary gear set that includes a third ring gear and a third sun gear. The transmission system further includes a first brake device configured to selectively ground the first ring gear, a second brake device configured to selectively ground the second ring gear, and a first lock-up clutch configured to selectively ground the first ring gear, wherein the first sun gear, the second sun gear, and the third sun gear are coupled in series.

A tolerance ring is interposed between an output side rotary shaft and a rotor shaft. For this reason, even in a case where a backlash formed in a spline fitting portion between the output side rotary shaft and the rotor shaft is not eliminated, the rotary shafts of both of the output side rotary shaft and the rotor shaft are held by the tolerance ring without a backlash, and rattling noise can be suppressed. An oil supply groove for supplying a lubricant between an annular portion of the tolerance ring and the output side rotary shaft is provided inside an annular groove formed in the output side rotary shaft. With this, it is possible to suppress degradation of the durability of the tolerance ring without performing special processing on the tolerance ring.