Abstract: A planetary gear train for an aircraft engine, has: a sun gear; planet gear assemblies having main gears meshed with the sun gear, fore lateral gears and aft lateral gears disposed on opposite sides of the main gears and rotating therewith; journal bearings rotatably supporting the planet gear assemblies for rotation about rotation axes, gaps defined between the journal bearings and the planetary gear assemblies; a planet carrier supporting the journal bearings; a fore ring gear meshed with the fore lateral gears; an aft ring gear meshed with the aft lateral gears; and a lubrication system extending within the planet carrier and hydraulically connected to the gaps between the journal bearings and the planet gear assemblies.

Abstract: A planetary gearing includes a sun gear rotating about a rotation axis and driven by a sun shaft; planet gears driven by the sun gear, each planet gear having an axially forward face side and an axially rearward face side; a ring gear engaging the planet gears; and planet slide bearing pins, wherein respectively one planet slide bearing pin is arranged inside a planet gear forming a lubricated journal bearing. At an axially forward face side and/or axially rearward face side, each planet gear forms a recess that extends inside the planet gear starting from the face side, and the planet slide bearing pins respectively form one crowning at their abutment surface such that their outer diameter decreases from a maximum outer diameter to at least an axial end of the abutment surface and has a minimum at the axial end.

Abstract: In one aspect, there is provided a gear train having a sun gear, planet gear assemblies. Each planet gear assembly has a main gear meshed with the sun gear, a fore lateral gear and an aft lateral gear disposed on opposite sides of the main gear and rotating therewith. A diameter of the main gear is different than a diameter of the fore and aft lateral gears. Each planet gear assembly is rotatably mounted on a bearing for rotation about an axis. The bearing includes a journal defining two undercuts. A planet carrier rotatably supports the planet gear assemblies. Ring gears are meshed with the fore and aft lateral gears. One of the sun gear, the planet carrier, and the ring gears connected to an input, one is connected to an output, and rotation of a remaining one is limited.

Abstract: A Ravigneaux planetary carrier assembly is provided for accommodating pinion gears of an automatic transmission. The carrier assembly comprises a powder metal carrier member including a carrier plate having a plurality of integral carrier legs extending therefrom, and a powder metal cover member including a cover plate having a plurality of integral cover legs extending therefrom. The carrier assembly is arranged such that respective ends of the carrier legs and ends of the cover legs are aligned with and brazed to one another, defining an interior of the carrier assembly configured to house the pinion gears.

Abstract: Disclosed is a planetary gear reducer for a vehicular steering apparatus. The planetary gear reducer includes: a sun gear, to which a steering shaft is joined; a planetary gear circumscribing the sun gear; a carrier, to which a rotary shaft of the planetary gear is joined; a ring gear, in which the planetary gear is inscribed; and backlash compensation members. The backlash compensation members are coupled to one or more of the sun gear, the planetary gear, and the ring gear such that the backlash compensation members are rotated in a state where they are in close contact with each other.

Abstract: A method of operating a transmission (1) with at least one interlocking shift element (F) having at least two shift element halves that can be brought into interlocked engagement with one another. When a command is received to close the interlocking shift element (F), a current rotational speed difference between the shift element halves of the interlocking shift element (F) and the current positions of the shift element halves are determined. If the rotational speed difference is smaller than a first speed difference threshold value and if a tooth-on-tooth position has occurred at the interlocking shift element (F), then to release the tooth-on-tooth position, the actuation force is changed to a release level at which a rotational speed difference above a second speed difference threshold value is produced between the shift element halves.

Abstract: A sun-and-planet speed-up gear includes a low-speed-stage sun-and-planet gearing and a high-speed-stage sun-and-planet gearing, in which an input shaft is connected to a low-speed-stage ring gear, the position of a shaft of a low-speed-stage planet gear is secured, a shaft of a low-speed-stage sun gear is connected to a high-speed-stage carrier, and an output shaft is connected to a high-speed-stage sun gear. In order to automatically center the low-speed-stage sun gear to prevent damage to gears and a bearing, a flange formed at a tip of the shaft of the low-speed-stage sun gear and a flange formed at a tip of a coupling that is directly attached to the high-speed-stage carrier or that is formed on the high-speed-stage carrier are coupled via a sleeve.

Abstract: A gearing system using modular gear bearing components. Each component is composed of a core, one or more modules attached to the core and two or more fastening modules rigidly attaching the modules to the core. The modules, which are attached to the core, may consist of gears, rollers or gear bearing components. The core orientation affects the orientation of the modules attached to the core. This is achieved via the keying arrangement of the core and the component modules that attach to the core. Such an arrangement will also facilitate the phase tuning of gear modules with respect to the core and other gear modules attached to the core.

Abstract: An automatic shift manual transmission equipped with a forward shifter for forward stage shifting, a reverse shifter for reverse stage shifting, an actuator rod carrying the forward shifter and the reverse shifter , and an actuator to operate the actuator rod according to shift operations of a shift lever, wherein a shifter length of the reverse shifter is substantially the same as the that of the forward shifter, and a reverse stage shift stroke is greater than a forward stage shift stroke by the difference in an operating measurement of the actuator rod.

Abstract: A gear bearing having a first gear and a second gear, each having a plurality of teeth. Each gear operates on two non-parallel surfaces of the opposing gear teeth to perform both gear and bearing functions simultaneously. The gears are moving at substantially the same speed at their contact points. The gears may be roller gear bearings or phase-shifted gear bearings, and may be arranged in a planet/sun system or used as a transmission. One preferred embodiment discloses and describes an anti-backlash feature to counter “dead zones” in the gear bearing movement.

Abstract: The disclosed gear bearing systems generally include first and second gear bearings having gear teeth, wherein the gear bearings are coupled together axially and the alignment and position of the gear bearings may be set substantially independently of the alignment and position of their gear teeth.

Abstract: A composite planetary speed reduction device (1), wherein gears (11), (12), and (13) and rollers (21), (22), and (23) forming a planetary gear speed reduction mechanism (10) and a planetary roller speed reduction mechanism (20) are integrally rotated around a common rotating center axis, respectively. The radius of the sun roller (21) is larger by ?r1 than the radius r1 of the working pitch circle of the sun gear (11), the radius r21 of the working pitch circle of the planetary gear (12) meshing with the sun gear (11) and the radius r23 of the working pitch circle of the planetary gear (12) meshing with an internal gear (13) are different from each other, and the radius of the planetary roller (22) is smaller by ?r1 than the radius r21 of the working pitch circle of the planetary gear (12).

Abstract: A motor vehicle having a primary internal combustion engine is equipped with a secondary engine and an electric motor to supplement the power produced by the primary engine. The primary engine provides power for acceleration and hill climbing. When in a cruising mode of travel, the primary engine is deactivated, and the secondary engine, which is smaller and more fuel-efficient than the primary engine, provides the driving power. The electric motor adjustably augments the power provided by the secondary engine.

Abstract: A speed change device has an input member rotatable in opposite directions to transmit higher torque as its rotation angle becomes larger, and a variable angle-ratio change mechanism including rollers and teethed wheels that are arranged in parallel to each other. The rollers and teethed wheels are respectively connected to rotate together with each other. The teeth of the wheels have a clearance on a pitch circle between their adjacent teeth so that the clearance is larger than a slip amount of the rollers in a low torque range where the rollers transmit low torque with bypassing the wheels in a normal operation. The wheels are engaged with each other to transmit high torque in a high torque range where the high torque is applied in an exceptional operation and the rollers slip larger than the slip amount in the low torque range.

Abstract: An integrated speed reducer and gerotor pump is disclosed. The device comprises a motor, a speed reducer, and a gerotor pump. The motor provides torque at an elevated speed. The speed reducer is coupled with the motor and converts the torque at an elevated speed into torque at a reduced speed. The gerotor pump is coupled with the speed reducer and uses the torque at the reduced speed for pumping fluids.

Abstract: An epicyclic gear system has a sun gear, a ring gear, and planet gears between the sun and ring gears. In addition, it has a carrier including a carrier flange offset axially from the planet gears and carrier pins that project from the flange into the planet gears, each with a shank anchored to the flange, a head remote from the flange, and a groove between the shank and head. Between the planet gears and the carrier pins are bearings, each including an inner race and rollers between the inner race and planet gear. Whereas the carrier pins are cantilevered from the carrier flange, the inner races are cantilevered from the heads of the carrier pins. The grooves in the pins enhance pin deflection, so that the axes about which the planet gears rotate remain parallel to the central axis of the system.

Abstract: An integrated electric motor and traction drive is disclosed. The device comprises an electric motor and a traction drive. The electric motor provides power at a high angular velocity to a sun roller. The sun roller transfers the power to the traction drive which reduces the power to a lower angular velocity and delivers it via an output shaft.

Abstract: A planetary gear comprising a central, rotatable input/output shaft (1a), an elastic outer ring (4) which when being elastically deformed encloses and presses at least three planet wheels (6, 12) in the form of rollers radially against a centrally mounted sun shaft (2), which extends axially in alignment with the input/output shaft (1a). The planet wheels (6, 12) have central holes and are rotatably mounted on stays (7, 13), the centre lines of the stays (7, 13) being parallel with the sun shaft (2). At least two (12) of the planet wheels have substantially coinciding centres with the stays (13) associated with the planet wheels (12), while the planet wheel or other planet wheels (6) as well as the associated stay or stays (7) is/are constructed such that the centre lines of the stays are positioned a given distance closer to the sun wheel (2) than the axes of the planet wheels (6) when the planet wheels (6) engage the sun shaft (2).

Abstract: A carrier C is integrally formed of a pair of flanges opposed to each other and designed to rotatably support rotating bodies therebetween and a plurality of joints for connecting the flanges. A groove is formed on the border between the flanges and the joints, and openings are made among the joints. Engagement holes for rotatably supporting rotational shafts of rotating bodies are made in the flanges.

Abstract: A speed reducer in a portable electric tool is specifically referred to a powered tool for automotive repair with lighter weight and 12V direct current motor. The speed reducer comprises a casing to be attached by the 12V direct current motor, an end planetary gear set driven by the motor, and an output shaft rotary attached to the casing and driven by the planetary gear set. The speed reducer is characterized in that the output shaft at an end thereof provides an internal gear disk with internal circular teeth to mesh with two oppositely parallel positioned over pins provided on each gear of end planetary gear set. Hence, the output shaft can be driven to rotate by the planetary gear set instead of gears of the planetary gear set directly meshing with the output shaft. In this way, the disadvantage of loosening apart easily resided in the prior art can be corrected and the torque of output shaft can be increased greatly for saving the effort of user.

Abstract: The gear consists of a housing (12) to which a drive motor (10) is flanged. Its shaft (1) carries a sun wheel (2) on which multiple planets (3) roll off. The planets (3) are positioned on a planetary carrier (6) which is rigidly connected to the output shaft (9). The shaft (9) is supported in the housing (12) coaxial to the shaft (1). Mounted to the housing (12) is a flange (17) of a cup-shaped annular wheel (8). Its lower rim (16) has a running surface (7) inside, on which the planets (3) roll off. The diameter of the running surface (7) is smaller than the sum of the diameter of the sun wheel (2) and twice the diameter of the planets (3), so that the rim (16) is elastically deformed. The planets (3) are supported rigidly in the circumferential direction and flexibly in the radial direction on the planetary carrier (6). Through this implementation, a backlash-free, rotationally very rigid gear is obtained with which high torques can be transferred in smooth operation.

Abstract: A planetary gear transmission has two or more planetary gear sets in the gear train. Each planetary gear set comprises a sun gear mounted on a sun shaft with the sun gear engaging a plurality of planet gears mounted on a planet gear carrier with the plurality of planet gears engaging a ring gear mounted on the transmission housing. Each gear of the planetary gear transmission is a helical cut gear. Sun gears and/or ring gears are mounted for axial movement with respect to the transmission. Thrust imbalances on the sun gears and/or ring gears resulting from uneven loading and the helical cut result in sun gears and/or ring gears moving in the axial direction to eliminate the thrust imbalances and thereby resulting in equal loading or power sharing amongst the planetary gear sets.

Abstract: This includes a first rotatable gear (such as a sun gear) and a second rotatable gear (such as a ring gear) spaced from the first rotatable gear. A rotatable inner gear is positioned between and meshes with both the first rotatable and the second rotatable gear. A force is selectively applied between the inner gear and the first gear as a second force is applied between the inner gear and the second gear. By properly selecting the magnitude of the first and second forces one can obtain a greater rotational movement of either the first gear or the second gear.

Abstract: Centrifugal separator comprising a drum (8) driven in rotation by a main electric motor (1), via a machine pulley (5), a first drive shaft (6) and a reducer (7), a screw (17), surrounded by the drum and driven in rotation by a secondary electric motor (9), via a second and third drive shaft (10, 16), coaxial with the first shaft (6), wherein a module is mounted between the secondary electric motor (9) and the reducer (7) comprising a casing (11), a sleeve (13) and a planetary hub (15), the hub passing through the casing and comprising a first planetary gear (25) rigidly attached in rotation to the hub, the sleeve (13) being disposed around a part of the hub (15) and comprising, rigidly attached in rotation, a second planetary gear (26), at least one axle (27) being mounted parallel to the hub (15) and comprising two satellite gears (29,30,31,32), rigidly attached in rotation to the axle, which engage with the first planetary gear (25) and the secondary planetary gear (26) respectively, at least one of the sai

Abstract: An improved power take-off arrangement for a transfer case which is readily incorporated into a planetary gear reduction assembly without necessitating excessive redesign of the transfer case. The power take-off arrangement includes utilization of a bearing support member for eliminating excessive eccentric loading during power take-off operation while providing improved centering and piloting capabilities.

Abstract: An improved power take-off arrangement for a transfer case which is readily incorporated into a planetary gear reduction assembly without necessitating excessive redesign of the transfer case. The power take-off arrangement includes utilization of a bearing support member for eliminating excessive eccentric loading during power take-off operation while providing improved centering and piloting capabilities.

Abstract: A planetary gear includes a middle planetary gear part, a disc part on one side of the planetary gear part having a radius smaller than a radius of the tooth root circle of the planetary gear part and another disc part on another side of the planetary gear part having a radius bigger than a radius of a tooth edge circle of the planetary gear part. An internal gear includes a middle internal gear part, an inner cylindrical part on one side of the internal gear having a radius smaller than a radius of a tooth edge circle of the internal gear part and another inner cylindrical part on another side of the internal gear having a radius bigger than a radius of a tooth root circle of the internal gear part. The planetary smaller disc parts can rollingly engage the smaller inner cylindrical part of the internal gear. The planetary bigger disc parts can rollingly engage the bigger inner cylindrical part of the internal gear. The planetary gear part and two disc parts are unified in a body.

Abstract: A modified planetary gear assembly includes a sun gear, planetary gears, an internally-toothed ring gear and a carrier, and can either transmit or not transmit torque from the sun gear to the carrier. The internally-toothed ring gear has outer peripheries on both sides suitable for being supported by a bearing device and a middle groove on the outer surface having timing teeth shaped around the groove. The peripheries are supported by a bearing device. A stopper device which is movable in a radial direction is mounted at a point around the middle groove. When the stopper device is moved forward to engage with the timing tooth, the internally-toothed ring gear is fixed and torque is transmitted from the sun gear to the carrier. When the stopper device is retracted, the internally-toothed ring gear freely rotates and no torque is transmitted. Thus, there are two states of torque transmission.