Abstract: A transmission having basic and reversing transmissions. The basic transmission has planetary gearsets, shafts and shift elements. A sun of gearset (P1) couples the drive shaft, which can couple shaft (6) and the suns of gearsets (P2, P3), and shaft (5) and the carrier and ring of gearsets (P2, P3) respectively. Carrier of gearset (P1) couples shaft (4), which couples the ring of gearset (P2). The ring of gearset (P1) couples shaft (3). Shafts (3, 4, 5) can couple the housing. The output shaft couples the carrier of gearset (P3). The reversing transmission has a minus planetary gearset with a sun which couples and is driven by the basic transmission output, and a carrier that can couple the housing via a locking element, and a ring that couples the reversing transmission output which can couple, via another locking element, the basic transmission output.

Abstract: A compact five-speed transmission planetary gear train includes a first, second, third, and fourth planetary gear sets between an input and an output as well as first, second, third, and fourth brakes and first and second clutches. The first, second, third and fourth brakes and first and second clutches are selectively actuatable to provide five different forward speeds and a four different reverse speeds between the input and the output. The compact transmission also includes a first brake, second brake, third brake, fourth brake, first clutch, and second clutch associated with the planetary gear train, the first brake, second brake, third brake, fourth brake, first clutch, and second clutch being configured such that setting each forward and reverse speed of the compact transmission is accomplished via actuation of two of the first brake, second brake, third brake, fourth brake, first clutch, and second clutch.

Abstract: A family of transmissions has four planetary gear sets, five controllable clutches and brake, and a passive one way brake. Selective engagement of the brakes and clutches in combinations of three produces eight forward speed ratios and one reverse speed ratio. The passive one way brake is engaged in the first forward speed ratio and overruns in the second through fifth forward speed ratios.

Abstract: An automatic transmission includes an input shaft, an output member, a first planetary gear system, a second planetary gear system, a third planetary gear system, a fourth planetary gear system, and an engagement mechanism. The input shaft is configured to be rotated with power of a driving source relative to the transmission case. The output member is to output rotation of the input shaft using multiple gear-shifting. The multiple gear-shifting is provided by setting at least three of first to third clutches and first to third brakes in a connection state.

Abstract: A transmission device capable of transmitting power applied to an input shaft to an output shaft while changing a speed ratio to a plurality of stages, including a single-pinion type first planetary gear mechanism, a single-pinion type second planetary gear mechanism a third planetary gear mechanism; first clutch and second clutches; and first and second brakes. The first planetary gear mechanism is disposed more toward the input shaft side than the second planetary gear mechanism, and the second planetary gear mechanism is disposed more toward the input shaft side than the third planetary gear mechanism, and the first brake is disposed circumferentially outward of the second planetary gear mechanism so as to at least partially overlap with the second planetary gear mechanism, and the second brake is disposed circumferentially outward of the first planetary gear mechanism so as to at least partially overlap with the first planetary gear mechanism.

Abstract: An automatic transmission includes an input shaft or member, an output shaft or member and three simple and one compound planetary gear assemblies each including a sun gear, a planet gear carrier with a plurality of planet gears and a ring gear. The input shaft or member is coupled to the sun gear of the second planetary gear assembly and the output shaft is coupled to the planet gear carrier of the fourth planetary gear assembly. The transmission also includes six torque transmitting devices: one band brake, three friction brakes and two friction clutches.

Abstract: A planetary drive system that has an input and a gear housing that is connected to a speed control system. A cross connecting shaft is drivingly engaged by the speed control system and rotatably connects to a forward and reverse gear set that is drivingly connected to a reduction gear set to provide an output. The speed control system, forward and reverse gear set, and reduction gear set are actuated by band clutch elements that frictionally engage the exterior of ring gears and carriers within the system to control the operation of the planetary drive system.

Abstract: A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes. The torque transmitting devices are each selectively engageable in combinations of at least three to establish a plurality forward speed ratios and at least one reverse speed ratio.

Abstract: A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes a sun gear, a carrier member supporting a plurality of planet pinion gears and a ring gear member. The torque transmitting devices may include clutches and brakes. The torque transmitting devices are selectively engageable in combinations of at least three to establish a plurality forward speed ratios and at least one reverse speed ratio.

Abstract: An electric power tool includes a motor; a speed reducer for transferring a rotational power of the motor at a reduced speed; and a reduction ratio changing unit for changing a reduction ratio of the speed reducer. The speed reduction mechanism includes an axially slidable changeover member and a gear member, the changeover member being engaged with or disengaged from the gear member depending on an axial slide position thereof. The reduction ratio changing unit includes a shift actuator for axially sliding the changeover member, a driving state detector for detecting a driving state of the motor, a slide position detector for detecting a slide position of the changeover member and a controller for driving the shift actuator and for temporarily decreasing or increasing a rotational power of the motor depending on detection results of the driving state detector and the slide position detector, respectively.

Abstract: The multi-ratio transmission with forward and reverse gears, gearsets (P1, P2, P3, P4), shafts and shifting elements. A sun gear of the gearset (P1) directly couples an input shaft, which couples, via clutch (14), shaft (4) and, via clutch (17), shaft (7). Shaft (4) couples the carrier of gearset (P2) and the ring gear of gearset (P3) and couples, via brake (04), a housing. Shaft (7) couples the sun gear of gearset (P4) and, via clutch (78), shaft (8), which couples the sun gears of gearsets (P3, P2). Shaft (3) couples the carrier of gearset (P1) and the ring gear of gearset (P2) and, via brake (03), the housing. Shaft (5) couples the ring gear of gearset (P1) and, via brake (05), the housing. Shaft (6) couples the carrier of gearset (P3) and the ring gear of gearset (P4). The output shaft couples the carrier of gearset (P4).

Abstract: A racing transmission that is lightweight and simplistic. The racing transmission features a low gear, reverse gear, neutral and a direct drive gear. The transmission utilizes a drive shaft, a set of planetary and sun gears. The transmission disclosed herein does not use a countershaft to accomplish low and reverse.

Abstract: A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes. The torque transmitting devices are each selectively engageable in combinations of at least three to establish a plurality of forward speed ratios and at least one reverse speed ratio between the input member and the output member.

Abstract: A method of performing a double swap kickdown shift in a transmission having a main box and a compounder. The compounder is shifted during the hold speed phase of the downshift. The target ratio for the downshift is overshot by an overshoot RPM.

Abstract: A gear train of an automatic transmission for vehicles has the advantages of simplifying structures of the automatic transmission and improving power delivery performance and fuel economy as a consequence of realizing at least nine forward speeds and one reverse speed by combining three simple planetary gear sets with four clutches and three brakes.

Abstract: A drive system includes a planetary gear system. An input is affixed to a sun gear of the planetary gear system to rotate therewith and an output is affixed to the output ring gear to rotate therewith. A first brake system is selectively operable to rotationally lock an output ring gear of the planetary gear system, and a second brake system is selectively operable to rotationally lock the planet carrier of the planetary gear system. Rotary-wing aircraft implementations of the drive system are also disclosed.

Abstract: An automatic transmission includes an input shaft, an output member, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, and an engagement mechanism. Each of a plurality of gear ratios is provided by setting at least three of first to third clutches and first to third brakes in a connection state.

Abstract: A power transmission system of a hybrid electric vehicle includes an input shaft, a first planetary gear set having first, second, and third rotation elements, the second directly connected to the input shaft, and the third directly connected to a first motor/generator, a second planetary gear set having fourth, fifth, and sixth rotation elements, the fourth directly connected to the first rotation element and a second motor/generator, and the fifth selectively connected to the second rotation element, an output gear connected to the sixth rotation element, a first clutch selectively connecting the second rotation element with the fifth rotation element, a second clutch selectively connecting two rotation elements among the rotation elements of the first planetary gear set, a first brake interposed between the fifth rotation element and a transmission housing, and a second brake interposed between the third rotation element and the transmission housing.

Abstract: A drive system includes a planetary gear system. An input is affixed to a sun gear of the planetary gear system to rotate therewith and an output is affixed to the output ring gear to rotate therewith. A first brake system is selectively operable to rotationally lock an output ring gear of the planetary gear system, and a second brake system is selectively operable to rotationally lock the planet carrier of the planetary gear system. Rotary-wing aircraft implementations of the drive system are also disclosed.

Abstract: A planetary gear train of an automatic transmission may include an input shaft, an output gear, a first planetary gear set always outputting a negative rotation speed from a rotation speed input from the input shaft, a second planetary gear outputting the negative rotation speed input from the first planetary gear set or converting negative rotation speed into a positive rotation speed and outputting the positive rotation speed, a compound planetary gear set formed by third and fourth planetary gear sets and changing the rotation speed selectively through two paths and into nine forward speeds and one reverse speed, eight rotational members including two rotation elements connected to each other or one rotation element among the rotation elements of the first and second planetary gear sets and the compound planetary gear set, and a six friction members, and a transmission housing.

Abstract: A powertrain is provided that includes a hybrid transmission with an input member, an output member, and a stationary member, and a first and a second electric machine. Only a single planetary gear set having a first member, a second member, and a third member is operatively connected between the input member and the output member. The first, the second, and the third members include a ring gear member, a sun gear member, and a carrier member. The powertrain includes a first, a second, a third, and a fourth selectively engageable torque-transmitting mechanism. Selective engagement of a different one or ones of the torque-transmitting mechanisms and selective operation of one or both electric machines establishes a series operating mode, an input-split operating mode, at least one electric-only operating mode, and at least one fixed gear operating mode between the input member and the output member.

Abstract: A transmission device capable of transmitting power applied to an input shaft to an output shaft while changing a speed ratio to a plurality of stages, including a single-pinion type first planetary gear mechanism; a single-pinion type second planetary gear mechanism; a third planetary gear mechanism; a case that accommodates the first, second, and third planetary gear mechanisms; first and second clutches; and first and second brakes. A first carrier of the first planetary gear mechanism and a second ring gear of the second planetary gear mechanism are coupled together through a coupling member that extends circumferentially inward from the second ring gear, and the second ring gear is coupled to a second brake hub that configures the second brake through the first carrier.

Abstract: A vehicle final drive includes a fixed spindle about which a wheel hub is mounted for rotation by wheel bearings, and within which a park and service brake assembly is mounted including a stack of Belleville springs carried by an input quill mounted within an inner end region, and a disc brake pack mounted within an outer end region. Located in the hub outboard of the spindle is a two-stage planetary reduction transmission. A reaction plate is fixed to an outer end face of the spindle cylindrical portion and holds the disc brake pack and a hub of a double ring gear of the transmission in place and preloads the wheel bearings. A fluid distribution manifold is defined by a passage in the spindle for distributing flow for cooling and/or lubricating an input thrust bearing, input drive shaft coupling splines, the brake disc pack, the wheel bearings, and the first stage planet gear bearings.

Abstract: A transmission is provided having an input member, an output member, three planetary gear sets, two external gear sets or sprocket sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. Each of the external gear sets includes first and second members. The torque transmitting devices include clutches and brakes.

Abstract: A drive system includes a planetary gear system. An input is affixed to a sun gear of the planetary gear system to rotate therewith and an output is affixed to the output ring gear to rotate therewith. A first brake system is selectively operable to rotationally lock an output ring gear of the planetary gear system, and a second brake system is selectively operable to rotationally lock the planet carrier of the planetary gear system. Rotary-wing aircraft implementations of the drive system are also disclosed.

Abstract: A planetary gear mechanism for a bicycle, and more particularly to a planetary gear mechanism comprising a first planetary mechanism connected coaxially in series to a second planetary mechanism, which second planetary mechanism is connected coaxially in series to a third planetary mechanism, the second planetary mechanism output is a step up in speed from the first planetary mechanism output, the third planetary mechanism output is a step up in speed from the second planetary mechanism output.

Abstract: A transmission is provided having an input member, an output member, three planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes.

Abstract: A transmission has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes. The torque transmitting devices are each selectively engageable in combinations of at least two to establish at least ten forward speed ratios and at least one reverse speed ratio.

Abstract: A hybrid transmission is provided that is configured to shift between the hybrid series operating mode and the compound-split operating mode synchronously, without slipping any torque-transmitting mechanisms. The transmission includes an input member operatively connected with the engine, an output member, and a plurality of selectively engageable torque-transmitting mechanisms. A gearing arrangement and first and second motor/generators operatively connected with the gearing arrangement are also provided. A first of the torque-transmitting mechanisms is engaged to establish a hybrid series operating mode between the input member and the output member, and a second of the torque-transmitting mechanisms is engaged to establish a compound-split operating mode between the input member and the output member. The shift between the hybrid series operating mode and the compound-split operating mode is synchronous without slipping the torque-transmitting mechanisms and occurs while the engine is on.

Abstract: A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes. The torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member.

Abstract: An automatic transmission includes four planetary gear sets, a plurality of friction and synchronizing clutches and two drive assemblies. Input torque is provided to four clutches which selectively provide torque to various elements of the first and second planetary gear assemblies. Similarly, various elements of the first and second planetary gear assemblies provide power to the two drive assemblies which may either be chain drive or gear assemblies. The outputs of the drive assemblies drive sun gears of the third and fourth planetary gear assemblies. The transmission output is connected to and driven by the planet carriers of the third and fourth planetary assemblies. Sequenced operation of the friction and synchronizing clutches provides eight, nine or ten forward speeds or gear ratios.

Abstract: The invention concerns a multiple ratio transmission device with permanent meshing, in particular for making a gearbox capable of providing gear shifts without interrupting the power transmission, for example an automatic control or sequential control gearbox. Said device comprises three coaxial planetary trains using selective coupling means so that each provides local direct drive or at least one transmission ratio. According to the invention, said device comprises two coaxial planetary trains (TP1, TP2) belonging to two different power paths (8a and 8b) between an upstream rotary member and a downstream rotary member. Said device comprises two gear-type transfer elements (TR1, TR2) of different ratios, interposed between one of the rotary members and one of said planetary trains (TP1, TP2).

Abstract: A multi-mode hybrid drive train offers selective operation in any one of series, parallel, and power split modes. The multi-mode hybrid drive train includes two planetary gear sets and a collection of specifically placed brakes and clutches relative to those gear sets. The first planetary gear train includes a power input for receiving power from a primary rotational power source, as well as a first sun gear, first carrier and first ring gear. The second planetary gear train similarly includes a power input as well as a second sun gear, a second carrier connected to a final drive, and a second ring gear. A first motor is linked to the first sun gear and a second motor is linked to the second sun gear such that selective activation of the clutches, brakes, and motors places the multi-mode hybrid drive train in a selected mode of operation.

Abstract: An automatic transmission has first, second and third gear sets, first and second clutches, and first, second and third brakes. First, second and third sun gears, and a first carrier are interconnected with a second sun gear, a second carrier, a third carrier, an input shaft and an output gear, respectively. The first clutch selectively connects the first sun gear and the second sun gear to the input shaft, and the second clutch selectively connects the first ring gear and the second carrier to the input shaft. The first brake selectively connects the first ring gear and the second carrier to a casing. The second brake selectively connects the second ring gear and the third carrier to the casing, and the third brake selectively connects the third ring gear to the casing.

Abstract: A planetary drive system that has an input and a gear housing that is connected to a speed control system. A cross connecting shaft is drivingly engaged by the speed control system and rotatably connects to a forward and reverse gear set that is drivingly connected to a reduction gear set to provide an output. The speed control system, forward and reverse gear set, and reduction gear set are actuated by band clutch elements that frictionally engage the exterior of ring gears and carriers within the system to control the operation of the planetary drive system.

Abstract: A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and a brake. The torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member.

Abstract: A multi-speed planetary coupling transmission (3) which includes a plurality of planetary gear sets (4, 5, 6) and a plurality of shifting elements (A, B, D, E). Depending on actuation of the shifting elements (A, B, D, E), various gear ratios can be achieved by the transmission. At least one provided electric machine (EM1) is functionally connected with one of the planetary gear sets (6). From the electric machine (EM1), a torque can be introduced, via a shaft (6B) of the planetary gear set (6) associated with the electric machine (EM1), in order to support torque acting on the associated planetary gear set (6) and achieve a gear ratio in the transmission (3) via the electric machine (EM1).

Abstract: A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes. The torque transmitting devices are selectively engageable in combinations of at least two to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: The multi step transmission comprising gear sets (P1, P2, P3, P4), eight shafts and six shift elements. The sun gear of set (P1) couples the drive shaft, the carrier of set (P1) couples shaft (3) which couples a housing via brake (03), the drive shaft via clutch (13) and shaft (5) via clutch (35). Shaft (5) couples the ring gear of set (P2), to the sun gears of sets (P3, P4), and the drive shaft couples, via clutch (18), shaft (8) that couples the carrier of set (P4). Shaft (6) couples the ring gear of set (P1) and, via clutch (67), shaft (7) that couples the carrier of set (P2). The sun gear of set (P2) couples the housing. The ring gear of set (P3) couples shaft (4) that couples the housing via brake (04). The output shaft couples the ring gear and carrier of sets (P4, P3) respectively.

Abstract: A multi-stage transmission comprising planetary gear sets (P1, P2, P3, P4), shafts, and shift elements. The sun gear of gearset (P1) couples housing (G), the carrier of gearset (P1) couples shaft (3) which couples housing (G), via brake (03), and shaft (1) via clutch (13) and shaft (5) via clutch (35). Shaft (5) couples the ring gear of gearset (P2) and the sun gears of gearsets (P3, P4). Shaft (1) couples the sun gear of gearset (P2) and the carrier of gearset (P3). Shaft (6) couples the carrier of gearset (P2) and the ring gear of gearset (P1), the ring gear of set (P4) couples shaft (4) which couples housing (G) via brake (04), and output shaft (2) couples the carrier of gearset (P4) and shaft (7), which couples, via clutch (27), the ring gear of gearset (P3).

Abstract: A clutch arrangement that includes a clutch member and a follower member. The clutch member is coupled to a member of the transmission assembly that is proximate the torsional input of the transmission assembly and which must be in a non-rotating position to permit the transmission assembly to perform a torque multiplication operation. The follower member is biased into engagement with the clutch member to inhibit relative rotation therebetween. As the clutch member and the transmission member are coupled to one another, the transmission assembly is able to perform a torque multiplication operation. When, however, the torsion that is exerted onto the clutch member is sufficient to overcome the frictional engagement between the follower and clutch members, the clutch member, and the transmission member, rotate, thereby inhibiting the capability of the transmission to continue to perform the torque multiplication operation.

Abstract: A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque-transmitting devices. Further, a hydraulic fluid control circuit is provided for controlling the operation of the plurality of torque-transmitting devices. The hydraulic fluid control circuit receives pressurized hydraulic fluid from an off-axis hydraulic fluid pump and has a plurality of fluid passages disposed in the transmission house, input member and other coupling members.

Abstract: A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and at least one brake. The torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member.

Abstract: A multiple speed power transmission, comprising: a gearbox input shaft; an output shaft; and a collection of gears, friction clutches, and passive couplers capable of transmitting power from the gearbox input shaft to the output shaft with eight forward speed ratios and one reverse speed ratio wherein the first forward speed ratio is selected by engaging friction brakes using electromechanical actuators.

Abstract: A two-speed transmission for transmitting a drive torque of a vehicle, having an input shaft drivable by a drive unit, a planetary gear system with sun gear, planet gears, planet carriers and ring gear and an output shaft, the sun gear having a rotationally fixed connection to the input shaft and the planet carrier having a rotationally fixed connection to the output shaft, and having a regulatable clutch system whereby the planet carrier can be fixed either relative to the input shaft or relative to the ring gear, and having an exclusively engageable and disengageable clutch system whereby the ring gear can be fixed relative to a housing that supports the planetary gear system.

Abstract: A multi-gear mechanism includes first and second gear sets, an output set, multiple first planet gears pivotably connected between the first and second gear sets, a first gear ring having internal teeth and external teeth, multiple second planet gears cooperated with the internal teeth of the first gear ring, a second gear ring having internal teeth and side teeth, an operation gear ring and a motor gear. The motor gear extends through two central holes of the first and second gear sets, and the first and second planet gears are engaged with the motor gear. The operation gear ring is connected with the second gear ring which drives the operation gear ring to move axially. The motor gear drives the output set at low speed, constant speed or high speed when the operation gear ring and the second gear ring are operated to engage with different gears.

Abstract: A vehicle driveline includes a multi-speed transmission that has four planetary gear sets having continuous interconnections and five torque-transmitting mechanisms selectively engagable to establish eight forward and at least one reverse speed ratio between the transmission input member and the transmission output member. The transmission input and output members define an axis of rotation parallel to an axis of rotation of an engine output member that drives the transmission. At least one rotatable element transfers torque from the engine output member to the transmission input member. The torque-transmitting mechanisms are packaged in different ones of six possible zones within the transmission casing. An additional, final drive planetary gear set and a differential mechanism are also included in the driveline.

Abstract: A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes. The torque transmitting devices are selectively engageable in combinations of at least two to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: An electrically-variable transmission is provided with substantially identical motor modules to simplify assembly and realize economies of scale in purchasing and testing the motor modules. First and second motor modules are packaged within a transmission casing and are operatively connecting the input member and the output member and coaxially arranged about the axis of rotation. Each motor module includes a respective motor/generator with a rotor rotatable about the axis of rotation and defining a rotor cavity. A planetary gear set is packaged within the cavity and has a first, a second and a third member. A rotor hub supports the rotor and has first and second annular end portions at opposing ends of the rotor hub, and an annular midportion connected for common rotation with the first member of the planetary gear set. A selectively engagable rotating-type clutch is packaged within the cavity and connected with the rotor hub.

Abstract: Multi-stage transmission having six or seven forward gears and three reverse gears comprises three planetary gear sets (P1, P2, P3), six rotatable shafts (1, 2, 3, 4, 5, 6), as well as six shifting elements (03, 04, 13, 14, 15, 35, 36, 46), whereby the shaft (1) is permanently connected to input element (An) and to the sun gear of the second planetary gear set (P2), the shaft (2) is permanently connected to the output element (Ab) and the ring gear of the third planetary gear set (P3), the shaft (3) is permanently connected to the ring gear of the second planetary gear set (P2), the shaft (4) is permanently connected to the web of the third planetary gear set (P3), the shaft (5) is permanently connected to the ring gear of the first planetary gear set (P1), to the web of the second planetary gear set (P2), and to the sun gear of the third planetary gear set (P3), the shaft (6) is permanently connected to the web of the first planetary gear set (P1), whereby the sun gear of the first planetary gear set (P1) is