A coaxial electrified drive axle is provided for a vehicle. The coaxial electrified drive axle has an electric motor connected to a gear box housing containing a stepped planetary gear set operatively coupling a drive shaft of the electric motor to a linkshaft and an output shaft through a differential assembly. The differential assembly is contained within a carrier which also supports the planet gears through planet pins. The carrier is supported by a single carrier support bearing. The drive shaft, the linkshaft, and the output shaft are coaxial and share a common axis of rotation.

A drive axle for a vehicle has a differential gearing system 3 arranged in a transmission housing 1, which differential is connected by plug-in shafts 5 to wheel hubs 7, where the plug-in shafts 5 extend through axle housings 2. The plug-in shafts 5 are arranged with their ends facing toward the differential gearing 3 fixed on the axle bevel gears 4 of the differential gearing 3. A transmitter wheel 9 is arranged on one or both plug-in shafts 5, whose rotary movement can be detected by a rotation speed sensor 8 arranged on the transmission housing 1 or the axle housing 2. The plug-in shafts 5 are guided radially, directly or indirectly, on the transmission housing 1 or in an area of the axle housing 2 adjacent to the transmission housing 1.

A vehicle drive device includes a rotary electric machine including a stator and a rotor, a power transmission mechanism drivingly connected to the rotor, a differential device including a differential ring gear, a differential case, and a differential mechanism, and a case. The case includes a partition wall disposed between the rotary electric machine and the differential device. The partition wall has an opening at a portion where a distance between a stator core and the differential device is shortest so that part of the stator core is exposed on a differential device side.

A disconnectable differential assembly has a reduced axial length and a side gear disconnectable from an axle shaft via a clutch unit. Various components of the disconnect mechanism are axially aligned and concentric to reduce the axial length. An output hub splined on the axle shaft and is actuatable, via an axially shiftable armature, into toothed engagement with the side gear via respective axially extending teeth. The output hub and armature include radially extending flanges that are axially adjacent and radially aligned with the teeth so that force is transmitted to the teeth at the same diameter. A thrust bearing is disposed between the flanges so that the output hub rotates relative to the armature. The side gear is supported for rotation on the axle shaft, and a bearing is disposed radially therebetween to improve radial alignment of the second side gear with the output hub.

An electronic differential disconnect clutch includes a differential unit, a first flange, a hub, a second flange, a hub sleeve and a solenoid. The differential unit has a pair of splines arranged for receiving a pair of axle shafts. The first flange has a first face spline and is fixed to the differential unit. The hub is rotatable relative to the differential unit and arranged to receive an input torque. The second flange is rotationally fixed and axially displaceable on the hub and has a second face spline arranged for engaging the first face spline. The hub sleeve is arranged to axially displace the second flange to engage the second face spline with the first face spline. The solenoid is arranged to axially displace the hub sleeve.

Transmission system for a motor vehicle includes a differential drive device configured to distribute a torque to two wheel shafts of an axle, and which includes a coupling device having a coupled position in which the transmission of the torque via the differential drive device is provided and a decoupled position in which the transmission of the torque via the differential drive device is interrupted. The coupling device includes an actuator including a piston guided in axial translation between a retracted position and an extended position; and a thrust bearing which is inserted between the piston and a first coupling part of the coupling device so as to transmit an actuating force of the piston to the first coupling portion and to move the first coupling portion from the uncoupled position to the coupled position during the movement of the piston from the retracted position to the extended position.

Provided is a transmission device that can increase a lubricity of a bearing in a planetary gear. The present disclosure includes the transmission device including a sun gear, a ring gear, planetary gears, bearings through shafts of the planetary gears are inserted, a differential case including bearing holders holding the respective bearings, a differential mechanism arranged inside the differential case, and a gear case supporting the differential case in a rotatable manner. Each bearing holder includes a cylindrical part holding a corresponding one of the bearings, and a pocket that is recessed from a radially inner side to a radially outer side to have an internal space that axially overlaps with the corresponding one of the bearings. The gear case includes a protrusion that is arranged to overlap with the pockets from the radially inner side of the sun gear and that axially protrudes toward the bearings.

A transmission includes a first shaft unit connected to a drive shaft of a drive unit. The first shaft unit includes a first shaft having a first shaft raceway surface on an outer peripheral surface thereof, a first output gear provided on the first shaft, a first outer ring attached to a first support part, the first outer ring having a first outer ring raceway surface on an inner peripheral surface thereof, and a plurality of first rolling elements disposed between the first shaft raceway surface and the first outer ring raceway surface.