A differential case includes: two supported parts so supported that a differential case is rotatable around a central axis of the differential chamber; and a flange provided between the supported parts and projecting in an outer diameter direction, and welded with a ring gear. The flange includes a bearing surface and a rounded base disposed on one side of the differential case in an axial direction. The bearing surface is in contact with a surface, of the ring gear, disposed on opposite side of a tooth surface of the ring gear, and the rounded base is coupled in a continuous fashion to the bearing surface. A rounded part that disperses stress, generated at the rounded base by gear reaction force derived from the ring gear, is provided in a region between the flange and one of the supported parts disposed on the one side.

A bevel gear assembly for a vehicle includes a housing, a side plate, and a plurality of planet gears. The housing has an outer bevel gear profile and a first annular ring. The side plate is fixed to the housing and has a second annular ring. The plurality of planet gears is disposed axially between the first and second annular rings. In some example embodiments, the bevel gear assembly has a plurality of planet pins extending through respective planet gears of the plurality of planet gears. In an example embodiment, each of the planet pins of the plurality of planet pins extend through respective apertures in each of the first and second annular rings.

A differential (1) includes pinion gears (2, 3), a drive wheel (4), and at least one cover (5, 13), wherein: the outside of the drive wheel (4) has toothing (7) extending circumferentially around an axis of rotation (6) and the inside of the drive wheel is provided with bearing points (8, 9); the pinion gears (2, 3) are mounted on the bearing points (8, 9) in the drive wheel (4); and the differential (1) is closed on at least one side by the at least one cover (5, 13).

A pinion shaft assembly facilitates assembly of an automotive differential. An angular contact double row ball bearing is assembled to an outer surface of a hollow pinion shaft. An axial pre-load is established and maintained by orbitally forming an outwardly turned portion of the hollow pinion shaft. In some embodiments, the two inner rings are assembled to the pinion shaft. In other embodiments, a raceway may be formed directly on an outer surface of the pinion shaft to eliminate one of the inner rings. The pinion shaft includes a spline, such as an axial spline or a face spline, for fixation to a driveshaft.

A gearwheel (20) for a gear step in an electric vehicle transmission (18) includes a gearwheel carrier and a toothed ring (30) having an external toothing (42). The toothed ring is rotationally fixable to the gearwheel carrier. The gearwheel carrier is formed by a first partial carrier (38) and a second partial carrier (40) that are at least partially axially spaced apart and extend from the toothed ring radially inward. An axial spacing of the two partial carriers is greater, at least partially, than an axial length of the toothed ring.

An axle assembly with a housing, an annular gear, a bearing, a differential, and a pair of output shafts. The housing has an annular hub. The annular gear is received in the housing. The bearing, which is a four-point angular contact bearing, supports the gear for rotation about an axis relative to the housing and has an inner bearing race, which is mounted on the annular hub, and an outer bearing race that is fixedly coupled to the annular gear. The differential is received in the housing and includes an input member, which is coupled to the annular gear for rotation therewith, and a pair of output members that are rotatable relative to the input member about the output axis. Each of the output shafts is coupled to an associated one of the output members for rotation therewith. One of the output shafts extends through the annular hub.

A differential device includes a differential case (10) that has a flange portion (11) and a differential ring gear (40) that has a tooth portion, a fixed and supported portion (45), and a coupling portion. The differential case (10) has a first abutting surface (10a) and a restricting portion (10b). The differential ring gear (40) has a second abutting surface (40a) and an abutting portion (40b). A welding portion that is formed by welding the flange portion (11) of the differential case (10) and the fixed and supported portion (45) of the differential ring gear (40) is disposed at a position that is different from an abutting part between the first abutting surface (10a) and the second abutting surface (40a) and an abutting part between the restricting portion (10b) and the abutting portion (40b).

A differential gear including a rotatably mounted differential housing and a final driven gear mounted rotationally fixed to the differential housing. The differential housing, on the outer circumferential surface thereof, includes two mating surfaces and that the final driven gear, on the inner circumferential surface thereof, includes two radially opposite mating surfaces. The mating surfaces formed on the outer circumferential surface of the differential housing and the mating surfaces formed on the inner circumferential surface of the final driven gear are each designed as separate mating surfaces which, when viewed in axial direction (a), are arranged geometrically separated from each other by a spacing.

A final reduction apparatus includes a carrier, a differential device, a clutch member for interrupting a differential movement of the differential device, and an actuator for operating the clutch member. The clutch member is accommodated in a differential case of the differential device. The actuator is disposed outside the differential case. The carrier includes a main body in which an opening is formed and a cover that closes the opening. The differential device is insertable via the opening into the main body. The actuator is disposed on a side of the cover that is, on an opposite side of the actuator with respect to the opening than the differential device.

A transmission device includes a power-transmission case having a carrier of a reduction gear and a differential case joined to the carrier is supported in a transmission case via case support bearings, a specific planetary gear portion of a planetary gear is disposed on one side of a differential mechanism in an axial direction, and the specific case support bearing is disposed on the other side thereof An oil passage-forming body is provided on an inner wall of the transmission case, the oil passage-forming body comprising an oil collection part that opens upward and can collect lubricating oil splashed up in an area around the specific planetary gear portion within the transmission case accompanying rotation of the power-transmission case, and an oil reservoir part that is continuous from the oil collection part, stores lubricating oil collected by the oil collection part, and supplies the lubricating oil to the specific case support bearing.