A wheel hub for tandem axles including a housing, a reduction system, sun gears, planetary gears and a connection sleeve. The housing contains the reduction system, which is formed by the conical sun gears and the conical planetary gears that are accommodated in a supporting structure. The sun gears are mounted in a yoke that is attached to the supporting structure. The conical planetary gears are attached, respectively, to a differential housing in a fixed way and to an end of a semi-draft having free rotation. The connection sleeve is mounted in the end of the semi-draft having concentric mobility in relation to the conical planetary gear through an actuator system placed in an end of the supporting structure. The connection sleeve is formed by a body having a surface with double connection toothing disclosing a toothing of the yoke, and the toothing of the conical planetary gear.

A drive device for a motor vehicle includes a drive machine and a transmission device having a triple planetary great set and having a first and second clutch, wherein the triple planetary gear set has a plurality of triple planet gears, wherein each triple planet gear includes a first gear, a second gear, and a third gear. The three gears of each triple planet gear are connected to each other for conjoint rotation and are jointly rotatably accommodated on a planet carrier, and the drive machine is connected to the triple planetary gear set by the first clutch and a first sun gear or by the second clutch and a second sun gear.

A drive device for a motor vehicle includes a drive machine and a transmission device having a triple planetary great set and having a first and second clutch, wherein the triple planetary gear set has a plurality of triple planet gears, wherein each triple planet gear includes a first gear, a second gear, and a third gear. The three gears of each triple planet gear are connected to each other for conjoint rotation and are jointly rotatably accommodated on a planet carrier, and the drive machine is connected to the triple planetary gear set by the first clutch and a first sun gear or by the second clutch and a second sun gear.

An automatic transmission is provided, which includes a friction engaging element. The friction engaging element includes a plurality of friction plates disposed inside a transmission case, a piston configured to cause the plurality of friction plates to be engaged with each other, a spring configured to bias the piston, and a hydraulic chamber to which hydraulic fluid is supplied, the hydraulic fluid biasing the piston. The hydraulic chamber is disposed so as to overlap with the spring in a radially internal and external relationship.

An automatic transmission is provided, which includes a friction engaging element. The friction engaging element includes a plurality of friction plates disposed inside a transmission case, a piston configured to cause the plurality of friction plates to be engaged with each other, a spring configured to bias the piston, and a hydraulic chamber to which hydraulic fluid is supplied, the hydraulic fluid biasing the piston. The hydraulic chamber is disposed so as to overlap with the spring in a radially internal and external relationship.

A planetary carrier includes a plurality of pinion gears, a plurality of pinion shafts that are each inserted in the corresponding pinion gear, a first supporting plate that supports one end of each of the pinion shafts, a second supporting plate that supports the other end of each of the pinion shafts, and a plurality of bridge plates, one end of each of which is joined to the first supporting plate via a welding portion and the other end of each of which is joined to the second supporting plate via a welding portion and which connects the first and second supporting plates.

A planetary carrier includes a plurality of pinion gears, a plurality of pinion shafts that are each inserted in the corresponding pinion gear, a first supporting plate that supports one end of each of the pinion shafts, a second supporting plate that supports the other end of each of the pinion shafts, and a plurality of bridge plates, one end of each of which is joined to the first supporting plate via a welding portion and the other end of each of which is joined to the second supporting plate via a welding portion and which connects the first and second supporting plates.

A transmission for a vehicle includes a primary transmission arrangement, a transmission housing, an input shaft, and an output shaft. The primary transmission arrangement includes a first, second and third planetary gear set each including a first, a second and a third planetary member, said planetary members being a sun gear, a planet carrier and a ring gear. The transmission arrangement further includes five shift elements engageable in combinations of two to obtain six forward gear stages, wherein the ring gear of the first planetary gear set and the planet carrier of the second planetary gear set are operatively connected to each other, the ring gear of the second planetary gear set and the planet carrier of the third planetary gear set are operatively connected to each other, and two planetary members of the third planetary gear set are selectively connectable to each other.

A multiple speed transmission includes an input member, an output member, first, second, third and fourth planetary gearsets each having first, second and third members, and a plurality of interconnecting members each connected between at least one of the first, second, third, and fourth planetary gearsets and at least another of the first, second, third, and fourth planetary gearsets. The transmission includes a plurality of torque-transmitting mechanisms between the input and output members, wherein the torque transmitting mechanisms are selectively engageable in combinations of at least four to establish at least ten forward speed ratios between the input member and the output member.

A multiple speed transmission includes an input member, an output member, first, second, third and fourth planetary gearsets each having first, second and third members, and a plurality of interconnecting members each connected between at least one of the first, second, third, and fourth planetary gearsets and at least another of the first, second, third, and fourth planetary gearsets. The transmission includes a plurality of torque-transmitting mechanisms between the input and output members, wherein the torque transmitting mechanisms are selectively engageable in combinations of at least four to establish at least ten forward speed ratios between the input member and the output member.