Abstract: The invention relates a differential assembly in the form of a crown differential for being used in the driveline of a motor vehicle. The differential assembly (2) comprises a one-piece differential carrier (3) which is rotatably drivable around an axis of rotation A and, in a casing portion (7), comprises no more than two identical openings (8, 9) for mounting sideshaft gears (11, 12) rotatably held in the differential carrier (3) on the axis of rotation A, as well as differential gears (13) which rotate jointly with the differential carrier (3) around the axis of rotation A and engage the teeth of the sideshaft gears (11, 12). With reference to a longitudinal central plane, the openings (8, 9) are arranged so as to be mirror-symmetrical and comprise an axial length L1 corresponding at least to the diameter of the differential gears, and a greatest circumferential extension L2 which, in a radial view, corresponds at least to the diameter of the sideshaft gears (11, 12).

Abstract: A differential gearing unit with controllable torque and rotational speed distribution, composed of a housing (1), a differential gearing (6), a superposition gearing (7) and an auxiliary drive (8), with the differential gearing (6) comprising an input member (11) which is driven by the vehicle engine, and two output members (15, 16) with output shafts (3, 4), and with the superposition gearing (7) being a planetary gear set which is connected to two members (15, 16) of the differential gearing (6) and to the auxiliary drive (8).

Abstract: A differential assembly (11) for being rotatably supported around a longitudinal axis (A) and for being rotatingly driven inside a housing, comprising a differential carrier (12) which comprises a base (13) at its first end and an aperture (14) at its second end; two sideshaft gears (21, 23) arranged coaxially relative to the longitudinal axis (A), as well as a plurality of a differential gears (25, 26, 27) in the differential carrier, each engaging the two sideshaft gears; an outer bearing seat (15) at the first end of the differential carrier (12) for sliding on a first rolling contact bearing (16) and an inner bearing seat (17) at the second end of the differential carrier (12) for inserting a second rolling contact bearing (18).

Abstract: A differential gear mechanism includes a housing, first and second sun gears each including an external gear portion, and first and second planetary gears. The first and second sun gears include axial end surfaces pressed against contact surfaces provided at the housing by the first and second sun gears by means of thrust forces generated at engagement surfaces between the external gear portions and the planetary gears. Each of the sun gears includes a first portion having the external gear portion, a second portion, and a thrust force generating mechanism for generating thrust forces at the first portion and the second portion. A direction of the thrust force generated at the first portion by the thrust force generating mechanism is specified to be equal to a direction of the thrust force generated at the first portion by means of the engagement between the external gear portion and the planetary gear.

Abstract: A transmission device for distributing drive torque to two output shafts, including a differential with a driven differential cage. The outputs are connected to the differential, in which, between the differential cage and the output of one side, viewed in the direction of the flow of force, two plus-planetary gear trains are arranged adjacent and co-axial with the output. The gear trains have first and second sun gears, first and second planetary ranges with the first sun gear being connected to the differential and the second sun gear being connected with the first sun gear and the output. The segment of the planetary gear for actuating the transmission device or transferring torque is able to be braked and the segment of the planetary gear train reversing drive is coupled via a switching element to the transmission housing.

Abstract: In a vehicular driving force distribution system, an oil pump which produces a hydraulic pressure for operating a torque distribution mechanism is driven, via gears and a rotating shaft, by the rotation of a differential case of a differential device. Therefore, regardless of the rotational condition of right and left wheels, namely, even if one of the right and left wheels stops, the oil pump is driven by the driving force of the rotating differential case, thereby reliably operating the torque distribution mechanism. Also, a pump unit for housing the oil pump is supported on a partition wall that separates the differential device from the torque distribution mechanism, thereby easily supporting the oil pump.

Abstract: A drive axle assembly includes a pair of axleshafts connected to a pair of wheels, and a drive mechanism for selectively coupling a driven input shaft to one or both of the axleshafts. The drive mechanism includes first and second drive units that can be selectively engaged to control the magnitude of the drive torque transferred and the relative rotary speed between the input shaft and the axleshafts. Each drive unit includes a planetary gearset disposed between the input shaft and its corresponding axleshaft, and a pair of mode clutches that may be activated to cause the planetary gearset to establish different speed ratio drive connections between the input shaft and the axleshaft. A control system including an electronic control unit (ECU) and sensors are provided to control actuation of the clutches so as to control the side-to-side traction characteristics of the drive axle assembly.

Abstract: A drive axle assembly includes first and second axleshafts and a drive mechanism coupling a driven input shaft to the axleshafts. The drive mechanism includes a differential assembly, a planetary gear assembly operably disposed between the differential assembly and the first axleshaft, a brake and first and second mode clutches. The first clutch is operable with the brake and the planetary gear assembly to increase the rotary speed of the first axleshaft which, in turn, causes a corresponding decrease in the rotary speed of the second axleshaft. The second clutch is operable with the brakes and the planetary gear assembly to decrease the rotary speed of the first axleshaft so as to cause an increase in the rotary speed of the second axleshaft. A control system controls actuation of both mode clutches.

Abstract: Various embodiments of a torque biasing device for a rotating transmission are disclosed, and which are operable to vary the proportion of the outer torque transmitted to one or more output shafts. Multiple planetary gear sets are provided for speeding-up or slowing-down of ore shaft with respect to another, under the control of a computer. The invention is particularly applicable to motor vehicles.

Abstract: In an all-wheel drive train for a motor vehicle wherein the drive torque of the engine of the motor vehicle is transmitted from the transmission output shaft partially to the rear axle and partially to the front axle via an offset transmission structure and a laterally arranged drive shaft extending from the offset transmission structure past the transmission to the front axle of the motor vehicle extends from the offset transmission forwardly at a certain opening angle in close proximity to the transmission structure which narrows down toward the rear so that the rear end of the lateral drive shaft is relatively close to the center axis of the transmission.

Abstract: In a multi-disk clutch comprising a rotary body having splines formed thereon so as to extend helically along the surface thereof, with a number of disks having central openings with inwardly projecting teeth via which the discs are in rotationally positively locking engagement with the rotary body, the teeth are twisted so as to extend in a plane normal to the surface of the helically extending splines of the rotary body so that the end face areas of the teeth are in planar contact with the spline surfaces of the rotary body for the transmission of torque between the rotary body and the disks.

Abstract: The differential steering drive for a vehicle includes a drive differential and a steering differential. The vehicle includes respective left and right driving traction elements, a propulsion engine with an engine crankshaft, and a steering wheel rotatable by an operator to indicate an intended direction of travel. At least one of the drive differential and the steering differential includes an all-gear limited slip differential. In another embodiment, both the drive differential and the steering differential include an all-gear limited slip differential.

Abstract: A transaxle comprising a transmission, a pair of coaxial axles, a deceleration assembly for decreasing output rotational speed of the transmission, a differential assembly for transmitting power from the deceleration assembly to the pair of axles, and a common housing incorporating the transmission. The differential assembly includes a pair of gear train units disposed on the respective axles, and a bull gear for receiving output rotation of the deceleration assembly. Each of the gear train units includes a sun gear fixed on each of the axles, a holder relatively rotatably provided on each of the axles, and a planetary gear supported by the holder to mesh with the sun gear. The holders of the pair of gear train units are symmetrical with respect to a surface perpendicular to the pair of axles and joined to each other through the surface, and integrally fitted together in the bull common gear.

Abstract: A driving mechanism for a garden machine includes a ring gear having a plurality of peripheral teeth on an inner periphery thereof. An input shaft includes a first end fixed to the ring gear to turn therewith and a second end coupled with a gear train in a gearbox of the garden machine. A motor is mounted to an input side of the gearbox and includes an output shaft having a driving gear fixed thereon. The driving gear meshes with the peripheral teeth of the ring gear.

Abstract: A dual planetary gear transmission having two planetary gear sets rotatably mounted on a common grounded axle wherein sun gears span both planetary gear sets providing a system for gear movement to be transferred between both gear sets whereby additional input allows modification to a differential relationship between the main transmission members. The disclosed transmission has many applications, including integration within a weight-generating device.

Abstract: A drive axle assembly includes a pair of axleshafts connected to a pair of wheels, and a drive mechanism for selectively coupling a driven input shaft to one or both of the axleshafts. The drive mechanism includes first and second drive units that can be selectively engaged to control the magnitude of the drive torque transferred and the relative rotary speed between the input shaft and the axleshafts. Each drive unit includes a planetary gearset disposed between the input shaft and its corresponding axleshaft, and a pair of mode clutches that may be activated to cause the planetary gearset to establish different speed ratio drive connections between the input shaft and the axleshaft. A control system including an electronic control unit (ECU) and sensors are provided to control actuation of the clutches so as to control the side-to-side traction characteristics of the drive axle assembly.

Abstract: A differential device is equipped with differential gears 3 and a pair of output gears 5, 7 that mesh with the differential gears 3 in different meshing pitch-circle radii R1, R2. The output gears 5, 7 are formed by contrate gears, while the differential gears 3 are formed by spur gears.

Abstract: An axle assembly that includes a differential casing, which is rotatable about an axis, a pair of side gears that are disposed within the differential casing, a spacer and a cross pin. The spacer is disposed between the side gears. The cross pin is fixed to the differential casing and extends through the spacer. The cross pin is employed to limit end play of the axle shafts in a direction toward one another. The aperture in the spacer that receives the cross pin is relatively larger than the cross pin so that the spacer can control end play of the side gears independently of the cross pin.

Abstract: A differential mechanism includes a casing having two opposite ends each having a cover longitudinally mounted thereon. A rotator assembly is mounted in the casing and has a seat received in the casing. A shaft is diametrically mounted in the seat. Two differential gears are respectively rotatably mounted to two opposite ends of the shaft and are respectively engaged to a corresponding one of two drive gears that are respectively securely sleeved on a first drive axle and a second drive axle. An input coupling and an output coupling are respectively longitudinally mounted to the two opposite ends of the seat for centrally mounting the first drive axle and the second drive axle to two opposite ends of the seat. The input coupling is engaged to a transfer element.

Abstract: A differential gear system employs stably-oriented orbiting gears to convey drive torque from a drive shaft differentially to a first wheel shaft and to a second wheel shaft. A portion of the drive torque is conveyed to the first wheel shaft, and the remainder of the drive torque is conveyed to the second wheel shaft. The differential gear system uses a first stably-oriented orbiting inner gear to convey torque to the first wheel shaft and a second stably-oriented orbiting inner gear to convey torque to a second wheel shaft. Dual-axis couplings allow the stably-oriented orbiting inner gears to move in a translational, orbital motion, but prevent the inner gears from rotating. Each of the stably-oriented orbiting inner gears has outer teeth, whose surfaces are substantially planar. The outer teeth of the stably-oriented orbiting inner gears mesh with flat-surfaced inner teeth of hollow gears.

Abstract: An axle assembly that includes a differential casing, which is rotatable about an axis, a pair of side gears that are disposed within the differential casing, a spacer and a cross pin. The spacer is disposed between the side gears. The cross pin is fixed to the differential casing and extends through the spacer. The cross pin is employed to limit end play of the axle shafts in a direction toward one another. The aperture in the spacer that receives the cross pin is relatively larger than the cross pin so that the spacer can control end play of the side gears independently of the cross pin.

Abstract: A carrier is formed with a circular cylindrical supporting part 4a. This supporting part 4a is formed with a receiving hole 4b. A planetary gear 5 is rotatably received in the receiving hole 4. One side part inner peripheral surface and the other side part inner peripheral surface of the receiving hole 4a in the peripheral direction of the supporting part 4a are each formed of a circular arcuate face having a same radius of curvature as the radius of the planetary gear 5. The centers of curvature of the circular arcuate faces forming the one side part inner peripheral surface and the other side part inner peripheral surface, respectively, are spacedly arranged from each other in the peripheral direction of the supporting part 4a.

Abstract: An internal gear 10 is rotatably received within a housing 8 (planetary carrier 2 and case 4), and a sun gear 12 is rotatably disposed on a circle located inside of and concentric with the internal gear 10. Planet gears 14 which are carried within carrying openings 2c formed in a planetary carrier 2 are disposed between the internal gear 10 and the sun gear 12 in meshing engagement with the internal gear 10 and the sun gear 12. The internal gear 10, the sun gear 12 and the planet gears 14 each have spherical gear teeth, and develops a thrust upon occurrence of a relative rotation therebetween. A coupling 16 is connected to the inner periphery of the internal gear 10 through helical splines 10d and 16a for purpose of power transmission. The helical splines provide a novel thrust generating mechanism, which enlarges the extent in which a bias ratio can be adjusted.

Abstract: An internal gear 4 and a sun gear 5 are arranged on one end side and the other end side within a housing 1 which is driven for rotation about a rotation axis L. The internal gear 4 and the sun gear 5 are rotatably disposed about the rotation axis L. A first gear part 61 and a second gear part 62, which are different from each other in number of teeth, are formed on one end part and the other end part of a planetary gear 6, respectively. The first gear part 61 is meshed with an internal gear part 42 of the internal gear 4. The second gear part 62 is meshed with an external gear part 51 of the sun gear 5.

Abstract: An axle drive block for a motor vehicle, comprising a first and a second differential in a driven housing. Both of the differentials are coaxially aligned planetary spur gears, the sun wheels of which are drivably connected to the semiaxes of the first driven axle. The planet wheels of both differentials mesh the joint ring gear of the sun wheels. In order to lock the interaxle differential, the housing is provided with a first striking surface interacting with a second striking surface which is pressed thereto by ball ramps.

Abstract: A drive axle assembly includes a pair of axleshafts connected to a pair of wheels, and a drive mechanism for selectively coupling a driven input shaft to one or both of the axleshafts. The drive mechanism includes first and second drive units that can be selectively engaged to control the magnitude of the drive torque transferred and the relative rotary speed between the input shaft and the axleshafts. Each drive unit includes a planetary gearset disposed between the input shaft and its corresponding axleshaft, and a pair of mode clutches that may be activated to cause the planetary gearset to establish different speed ratio drive connections between the input shaft and the axleshaft. A control system including an electronic control unit (ECU) and sensors are provided to control actuation of the clutches so as to control the side-to-side traction characteristics of the drive axle assembly.

Abstract: A transaxle comprising a transmission, a pair of coaxial axles, a deceleration assembly for decreasing output rotational speed of the transmission, a differential assembly for transmitting power from the deceleration assembly to the pair of axles, and a common housing incorporating the transmission. The differential assembly includes a pair of gear train units disposed on the respective axles, and a bull gear for receiving output rotation of the deceleration assembly. Each of the gear train units includes a sun gear fixed on each of the axles, a holder relatively rotatably provided on each of the axles, and a planetary gear supported by the holder to mesh with the sun gear. The holders of the pair of gear train units are symmetrical with respect to a surface perpendicular to the pair of axles and joined to each other through the surface, and integrally fitted together in the bull common gear.

Abstract: A differential assembly that includes a differential casing, which is rotatable about an axis, and a pair of side gears that are disposed within the differential casing. First, second, third and fourth pairs of pinion bores are formed in the differential casing and pairs of pinion gears are slidably and rotatably disposed in a respective pair of the pinion bores. A window opening is formed in the differential casing between the first and fourth pair of pinion gears. The second pair of pinion bores are radially offset an equivalent distance from the first and third pair of pinion bores. The differential assembly incorporates a cross pin configured to limit inward movement of a pair of axle shafts and a spacer that limits inward movement of the side gears.

Abstract: A planetary differential including a differential case rotatable about an axis and a method of manufacturing thereof. The differential case includes a cover, a housing, an annulus gear, and a ring gear. The differential case defines a differential cavity having a clutch cavity and a planet cavity separated by a retainer plate coupled to the housing. The modular nature of this system allows both open and torque biasing constructions in the same packaging space. The method of manufacturing the differential includes the steps of coupling a retainer plate to the housing between the clutch cavity and the axial opening, placing a planetary gear set in the planetary cavity, and fixing the housing to the annulus gear and ring gear.

Abstract: A sun gear 6 is concentrically, rotatably disposed inside an internal gear 4. Plural planet gears 8, carried by a planetary carrier 10, are disposed between and in meshing engagement with the internal gear 4 and the sun gear 6. The planetary carrier 10 is connected to a shaft extending from an engine while the internal gear 4 and the sun gear 6 are connected to output shafts. The internal gear 4 is molded by a plastic working, followed by a thermal treatment including soft-nitriding, a nitriding and a carburizing hardening step. The inner surface of the internal gear 4 is formed with internal gear teeth 4b, except for an axial portion 4d, while a spline groove 4a is formed on the outer surface of the internal gear 4 at a location corresponding to the portion 4d where no internal teeth 4b are formed for engagement with a spline 2a on a housing 2. The internal gear 4 is reduced in size while improving the mechanical strength thereof.

Abstract: A differential drive having a drivable differential carrier 11 which is rotatably supported in a drive housing, which comprises a longitudinal carrier axis, in which two axle shaft gears 28, 29 whose axes extend co-axially relative to the longitudinal carrier axis are arranged and rotatably supported and in which a plurality of differential gears 31 whose axes extend radially relative to the longitudinal carrier axis are arranged and held so as to rotate with said differential carrier 11, wherein the axle shaft gears 28, 29 engage the differential gears 31; and having constant velocity joints 22, 23 which are positioned inside the differential carrier 11 and whose outer joint parts 26, 27 are connected to the axle shaft gears 28, 29 in a rotationally fast way, wherein, between the axle shaft gears 28, 29 in the differential carrier 11, there is arranged a spider member 30 which comprises a hub 32 whose axis extends co-axially relative to the carrier axis and which is provided with at least three bearing journ

Abstract: In a gearwheel pairing, in which one of a pair of gearwheels has, at least at one side thereof a lid-shaped stop structure for engaging the other gearwheel for retaining it in engagement with the other gear wheel. The arrangement is expediently used in a differential transmission in particular a crown-wheel differential transmission.

Abstract: A differential gear includes a main gear wheel rotating on an imaginary axis and having a first side and a second side opposite to the first side, a first output device, the first output device having a first sun gear pivoted to the first side of the main gear wheel for free rotation on the imaginary axis and a first output shaft extended from the first sun gear along the imaginary axis, a second output device, the second output device having a second sun gear pivoted to the second side of the main gear wheel for free rotation on the imaginary axis and a second output shaft extended from the second sun gear along the imaginary axis, and a first planet gear set, the first planet gear set having a first planet gear pivoted to the first side of the main gear wheel and meshed with the first sun gear, a second planet gear pivoted to the first side of the main gear wheel and meshed with the first planet gear, and a third planet gear pivoted to the second side of the main gear wheel and meshed with the second sun ge

Abstract: An axle center for delivering engine torque to two axle shafts which in turn transfer the torque to road wheels includes a torque coupling though which the torque is transferred to the axle shafts. The coupling includes a magnetic particle clutch and a planetary set organized about a common axis and coupled together such that two paths—a mechanical path and a clutch path—exist in the coupling for transferring torque through it, with the amount of torque transferred being dependent solely on the current in the magnetic particle clutch. A single torque coupling may be located where torque is delivered to the axle center or two torque couplings may be located at and connected to the two axle shafts, one for each shaft.

Abstract: A carrier 2 is fixed to one end opening part of a circular cylindrical apparatus main body 1. A plurality of receiving holes 2d, which extend in parallel with a rotation axis L, are formed in the carrier 2 at the same interval in a peripheral direction. A planetary gear 4 is received in each receiving hole 2d such that the planetary gear 4 can rotate on its own axis. An inner gear 5 and a sun gear 9, which are arranged with their axes aligned with the rotation axis L of the apparatus main body 1, are disposed within the apparatus main body 1. The inner gear 5 is engaged with the planetary gears 4 at the outside thereof. The sun gear 9 is engaged with the planetary gears 4 at the inner side thereof. An engagement part between the inner gear 5 and the planetary gear 4 and an engagement part between the sun gear 9 and the planetary gear 4 are displaced from each other in a direction of the rotation axis L so that they are not overlapped with each other in a direction of the rotation axis L.

Abstract: A torque biasing differential including a planetary case rotatable about an axis, a first output shaft rotatable relative to the planetary case, a second output shaft rotatable relative to the planetary case and the first output shaft, and a planetary assembly coupling the planetary case to the first and second output shafts. The planetary assembly includes first and second intermeshed inboard planet gears. The differential also include torque sinks associated with each of the first and second planetary assemblies to selectively distribute torque between the output shafts and control relative shaft rotation. The various embodiments of the torque biasing differential also describe alternative planetary differential configurations relating to the structure, orientation, and interaction of the sun gears, planet gears, and case.

Abstract: A sun gear 6 is rotatably disposed inside an internal gear 4 on a concentric circle therewith. A plurality of planet gears 8 which are carried by a planetary carrier 10 are disposed between the internal gear 4 and the sun gear 6 and are in meshing engagement with the internal gear 4 and the sun gear 6. The planetary carrier 10 which carries the planet gears 8 is connected to a shaft extending from an engine while the internal gear 4 and the sun gear 6 are connected to output shafts. The internal gear 4 is molded by a plastic working, followed by a thermal treatment including a soft-nitriding, a nitriding and a carburizing hardening step. The inner surface of the internal gear 4 is formed with internal gear teeth 4b except for an axial portion 4d while a spline groove 4a is formed on the outer surface of the internal gear 4 at a location corresponding to the portion 4d where no internal teeth 4b are formed for engagement with a spline 2a on a housing 2.

Abstract: A differential coupling (20) has a body (21), a rotary input member (22), and two rotary output shafts (23, 24). The algebraic sum of the angular displacements of the output shafts is proportional to the rotation of the input member. The improvement includes mechanical means (39), such as a planetary gear (42), for sensing a torque differential between the output shafts, and a brake (38) mounted on the body and operatively arranged to selectively brake rotation of the input member, or both output members, when the difference between the torques on the outputs exceeds a predetermined first value.

Abstract: A differential gear includes a differential housing consisting of cast iron and a differential crown wheel consisting of case hardened steel. The differential gear, while being of reproducible quality, can be produced simply and cost-effectively. The differential housing has, on the circumference onto which the differential crown wheel is pressed, a bearing shoulder, to which the differential crown wheel is fastened via a nickel-containing welded joint. The composition of the welded joint is influenced by the use of a nickel-containing additional material which is added to the welding melt in the form of an annular foil arranged between the bearing shoulder and the differential crown wheel.

Abstract: A differential gear includes a main gear wheel rotates on an imaginary axis and having a first side and a second side opposite to the first side, a first output device, the first output device having a first sun gear pivoted to the first side of the main gear wheel for free rotation on the imaginary axis and a first output shaft extended from the first sun gear along the imaginary axis, a second output device, the second output device having a second sun gear pivoted to the second side of the main gear wheel for free rotation on the imaginary axis and a second output shaft extended from the second sun gear along the imaginary axis, and a first planet gear set, the first planet gear set having a first planet gear pivoted to the first side of the main gear wheel and meshed with the first sun gear, a second planet gear pivoted to the first side of the main gear wheel and meshed with the first planet gear, and a third planet gear pivoted to the second side of the main gear wheel and meshed with the second sun gea

Abstract: A planetary gear type center differential unit contains a carrier, a first sun gear and a second sun gear provided interiorly of the carrier, a first and second pinions respectively meshing with the first and the second sun gears, a pinion member having a shaft-receiving hole and carrying the first pinion and the second pinion therearound, and a pinion shaft made of carbon/carbon composite. The pinion shaft is supported by the carrier at one end and is inserted into the shaft-receiving hole of the pinion member, so that the pinion shaft directly supports the pinion member so as to rotate.

Abstract: A dual planetary gear transmission according to the following characteristics is disclosed: 1) a first input and common output rotate in the same direction with the same speed as long as; 2) changing an input angle of the second input causes a differential angle between the first input and common output, said differential angle remaining constant until said second input returns to an original position or said input angle is changed; 3) the input angle may be added at any time independent of the first input's rotational speed; and 4) the first input has no effect on the differential angle caused by the second input angle. A mirrored version of the transmission includes two independent systems of two gear sets each. Based on the characteristics, the transmission allows the ratio of the input to output to be altered by changing the differential input. The transmission has many applications, including integration within a weight-generating device.

Abstract: In a differential drive having one differential carrier rotating in a housing, two side shaft gears are arranged coaxially relative to said differential carrier, and two sets of differential gears are supported in the differential carrier and rotate therewith and each engage one of the side shaft gears. The side shaft gears are crown gears and the differential gears form two sets of straight pinions which rotate on radial journals in the differential carrier, with the pinions of the two sets directly engaging one another in pairs so that, when the differential carrier is stationary, the side shaft gears are able to rotate in identical directions. In a differential drive having two differential carriers rotating in a housing, two side shaft gears are arranged coaxially relative to said differential carriers, and two sets of differential gears are supported in the differential carriers and rotate therewith, and each engage one of the side shaft gears.

Abstract: A transmission, especially for wind power installations includes a planetary stage on the input side that is mounted upstream of at least one gear stage. The planetary stage includes at least two power-splitting planetary gears that are mounted in parallel. A differential gear that is mounted downstream of the power-splitting planetary gears compensates for an unequal load distribution between the individual planetary gears caused by their parallel disposition.

Abstract: A geared rotary actuator has a differential gear unit having a drive input and first and second outputs, an output driven member for connection to an external member to be driven by the actuator and first and second drive paths (200, 300) coupling the first and second outputs of the differential gear unit to the output driven member. Under normal conditions, drive is transmitted from the input drive to the output driven member via the differential gear unit (100) and the first drive path (200). However, if the first drive path (200) jams, drive is transmitted to the output driven member via the differential gear unit (100) and the second drive path (300). If the differential gear unit (100) jams, drive is transmitted to the output member (36) via the differential gear unit (100) and both the first and second drive paths. The gear ratio between the drive input and the output driven member remains substantially constant.

Abstract: A planetary gear type center differential unit contains a carrier, a first sun gear and a second sun gear provided interiorly of the carrier, a first and second pinions respectively meshing with the first and the second sun gears, a pinion member having a shaft-receiving hole and carrying the first pinion and the second pinion therearound, and a pinion shaft made of carbon/carbon composite. The pinion shaft is supported by the carrier at one end and is inserted into the shaft-receiving hole of the pinion member, so that the pinion shaft directly supports the pinion member so as to rotate.

Abstract: In a differential drive having one differential carrier rotating in a housing, two side shaft gears are arranged coaxially relative to said differential carrier, and two sets of differential gears are supported in the differential carrier and rotate therewith and each engage one of the side shaft gears. The side shaft gears are crown gears and the differential gears form two sets of straight pinions which rotate on radial journals in the differential carrier, with the pinions of the two sets directly engaging one another in pairs so that, when the differential carrier is stationary, the side shaft gears (20, 21) are able to rotate in identical directions.

Abstract: In a differential drive having one differential carrier rotating in a housing, two side shaft gears are arranged coaxially relative to said differential carrier, and two sets of differential gears are supported in the differential carrier and rotate therewith and each engage one of the side shaft gears. The side shaft gears are crown gears and the differential gears form two sets of straight pinions which rotate on radial journals in the differential carrier, with the pinions of the two sets directly engaging one another in pairs so that, when the differential carrier is stationary, the side shaft gears (20, 21) are able to rotate in identical directions.

Abstract: A transaxle apparatus provided with a planetary gear type differential. The differential comprises a pair of co-axial axles, a sun gear, a center gear serving as a driving input gear, a pair of carriers, a pair of ring gears serving as steering input gears, and planet gears. The center gear interlocks with the sun gear. The pair of carriers are fixedly disposed around the respective axles oppositely to each other with respect to the center gear. The pair of ring gears are rotatably disposed around the respective carriers so as to slidably abut at their inner peripheral surfaces against outer peripheral surfaces of the respective carriers. Each of the ring gears is extended between the sun gear and each of the carriers disposed in the ring gear so as to be inner peripherally formed into an internal gear. Each of the carriers is integrally provided with a plurality of projections projecting toward the center gear between the sun gear and the internal gear.

Abstract: Method and apparatus for rotary motion converting power transmission assembly with counter-rotating outputs on the same axis as the rotary input.