Abstract: An electric actuator of the disclosure includes a motor, a speed reduction mechanism, and a bearing fixed to a motor shaft having an eccentric axis portion. The speed reduction mechanism has: an externally toothed gear, an internally toothed gear, a facing member facing the externally toothed gear, column members protruding from one member of the facing member and the externally toothed gear toward the other member and surrounding the motor axis, and at least one tube member surrounding the column members. The other member has hole portions surrounding the motor axis. The column members are inserted into the hole portions respectively, and support the externally toothed gear to be swingable around the motor axis via an inner side surface of each of the hole portions. The at least one tube member surrounds the column members in the hole portions and is rotatable around a rotary axis passing through the hole portions.

Abstract: This gear speed change device is provided with an input unit 13 in which an eccentric guide portion 14 is formed centered about an eccentric position x1, on an input shaft 11 having an axial center x, an internal/external gear 20 which has external teeth 18 and internal teeth 19 having the center of rotation at the eccentric position x1, and one side of which is rotatably held by the eccentric guide portion 14, an output unit 24 which has an output shaft 12 on the axis x and on one side of which are formed internal teeth 22 that mesh with the external teeth 18 and that are centered about the axis x, and a rotation control unit 25 for controlling the rotational speed of the output unit 24.

Abstract: A seat reclining mechanism has a protective device at the shell. The shell has an inner cover and an outer cover with a support plate set therein. The upper part of the shell has a gap for accommodating the rotation of an arm of a rotating plate extends out of the gap. A fence plate cooperates with the arm to keep the gap closed.

Abstract: A cycloid speed reducer includes an input shaft, a rolling assembly, first and second cycloid discs, a crankshaft and an output disc. The first and second cycloid discs are disposed around the input shaft and driven by the input shaft. The first and second cycloid discs are located at two opposite sides of the rolling assembly, respectively. The crankshaft includes first and second eccentric ends and first and second concentric ends integrally formed as a one-piece structure and arranged sequentially. The first and second eccentric ends are linked with the first and second cycloid discs respectively. An eccentricity value is between any neighboring two of the concentric and eccentric ends. The diameters of all the concentric and eccentric ends are equal. The output disc is linked with the first or second concentric end. The output disc is a power output end of the cycloid speed reducer.

Abstract: Provided is an automotive transmission control apparatus. The automotive transmission control apparatus includes: a housing; a main shaft provided in the housing; a driving unit coupled to the main shaft and configured to be driven based on a signal for controlling a gear position of a transmission; a reduction unit housed within the driving unit; and an output unit to receive a rotational force of the reduction unit and output the rotational force with a reduced rotational speed. The reduction unit includes: an inner gear member coupled to the main shaft and including a first gear portion and a second gear portion; and an outer gear member fixed to the housing and including a first receiving gear portion engaged with the first gear portion. Further, the output unit includes a second receiving gear portion engaged with the second gear portion.

Abstract: A series of transmissions includes a first transmission, a second transmission, a third transmission, and a fourth transmission. Each of the first, second, third and fourth transmissions has a first planetary stage and a second planetary stage. The first planetary stage and the second planetary stage in each case have an internal gear, a sun gear, a planetary carrier, and one or more planetary gears. The planetary carriers of the first planetary stages of the first transmission and of the second transmission are structurally identical. The planetary carriers of the first planetary stages of the third transmission and of the fourth transmission are structurally identical. A width of teeth of the planetary gears of the first planetary stage of the first transmission is smaller than a width of teeth of the planetary gears of the first planetary stage of the second transmission.

Abstract: A reduction drive has an electric motor and an output hub rotatable with respect to a motor housing. A planetary gear reduction assembly is disposed entirely within an internal volume formed by the output hub and includes a first ring gear fixed to and rotating with the output hub, a second ring gear fixed to a portion of the main housing, a sun gear driven by the motor shaft, and gears mounted on a carrier assembly and driven by the sun gear. Each planet gear has a first stage gear driving the first ring gear, and a second stage gear engaged to the second ring gear.

Abstract: A method for aligning toothing in an assembly of two half-ring gears is provided: an angular positioning pin is provided which is to be received in respective holes of the half-ring gears; the holes are drilled on the first half-ring gear such that the first hole has a first cross-section that is smaller than the final cross-section thereof; the angles between the teeth are compared between the two half-ring gears, and an angular difference between said angles of the half-ring gears is deduced therefrom; the first hole is redrilled to the final cross-section, while the centre of the hole is angularly shifted by the value of the angular difference; the pin is engaged in the holes, and the half-ring gears are then assembled using an interference fit.

Abstract: A dual function gearbox generates two separate output rotational motions from a single input rotational motion. First and second rotatable housings comprise corresponding first and second internal gears, with the internal gears having different pitch diameters. A drive shaft is disposed within the housings, extending though openings within opposite sides of housings, with an eccentric rotor disposed around the drive shaft. The eccentric rotor is in operative contact with a differential gear ring comprising first and second external gear rings having different diameters, with the first and second external gear rings engaging corresponding first and second internal gears. When rotational energy is imparted to one end of the drive shaft, the gearing arrangement imparts a rotational motion to either the first or second rotatable housing, with the housing rotating around the other end of the rotating drive shaft, which can extend outside of the dual function gearbox.

Abstract: An electric powertrain for a vehicle includes a cycloidal speed reducer having an input member configured to couple with a traction motor, a cycloidal disc defining a plurality of circumferentially arranged holes, and a plurality of circumferentially arranged pins each disposed in one of the holes. A differential of the vehicle has a case connected to each of the pins. The differential may be a cycloidal differential.

Abstract: A people conveyor (10) comprises: a chain of conveyance elements (12), which are configured for conveying people; a drive unit (14), which is configured for driving the chain of conveyance elements (12); and a self-locking gear (20; 40), which is configured to lock when no torque is transmitted from the drive unit (14) to the chain of conveyance elements (12).

Abstract: A speed reducer includes an input shaft member including a sun rotor arranged to rotate about a central axis; one or more planetary rolling elements each of which is supported to be capable of rotating around the sun rotor; a tubular eccentric shaft including an outer circumferential surface eccentric with respect to the central axis, and arranged to rotate about the central axis along with the rotation of the one or more planetary rolling elements; an eccentric oscillating gear including a plurality of external teeth in an outer circumferential surface thereof, and supported by the eccentric shaft through a first bearing; a housing including internal teeth arranged to mesh with the external teeth of the eccentric oscillating gear in an inner circumferential surface thereof; an output flange arranged to rotate about the central axis together with the eccentric oscillating gear, and including an eccentric oscillating carrier pin arranged to pass through the eccentric oscillating gear in an axial direction; and

Abstract: A transmission unit comprises a planet carrier, a first hollow planet gear, a second hollow planet gear, a first ring gear, and a second ring gear. The first hollow planet gear with a first module is coupled to the planet carrier through a bearing. The second hollow planet gear with a second module different from the first module is fixed to and moving in synchronization with the first hollow planet gear. The first ring gear encircles and meshes with the first hollow planet gear. The second ring gear encircles and meshes with the second follow planet gear.

Abstract: A parking brake actuator includes a motor, a power transfer assembly or gearing connected to an output shaft of the motor, a planetary gear set including a linear gear connected to the power transfer assembly, a planetary gear engaged with the linear gear, and a ring gear engaged with the planetary gear and including an insertion protrusion formed on a bottom, and a housing including a motor seating recess in which the motor is accommodated and a ring gear seating in which the ring gear is accommodated, in which the ring gear accommodating portion includes an insertion groove formed on a bottom surface into which the insertion protrusion is forcibly inserted.

Abstract: An elliptically interfacing gearbox system may include an input plate having a rotation axis and a plurality of input teeth. The gearbox system may include a wobble plate having a wobble axis disposed at a non-zero angle relative to the rotation axis, a rear face, and a plurality of face teeth disposed on the rear face. The wobble plate may further include a first plurality of wobble teeth disposed in a first plane perpendicular to the wobble axis and a second plurality of wobble teeth disposed in a second plane perpendicular to the wobble axis. The second plane may be spaced from the first plane along the wobble axis. The gearbox system may include a stator gear having a plurality of stator teeth and an output plate having an output axis substantially aligned with the rotation axis and a plurality of output teeth.

Abstract: A rotation driving device includes a motor provided in a housing, a planetary gear reducer connected to the motor coaxially with the motor, an output shaft connected to an end reduction member of the planetary gear reducer coaxially with the end reduction member, and a rotation detector located at the same position as the end reduction member in an axial direction of the planetary gear reducer and located at a different position from a center axis of the end reduction member in a radial direction of the planetary gear reducer, the rotation detector being capable of detecting a degree of rotation of the end reduction member. Accordingly, the rotation driving device can be made to be smaller and compact in the axial direction.

Abstract: Provided is a reduction gear with which allowable output can be further increased and a reduction in size can be achieved. A reduction gear (1) has a case (2), a speed reduction mechanism (3) accommodated within the case (2), a shaft portion (51) to which output of the speed reduction mechanism (3) is transmitted, and a pinion (52) coupled to the shaft portion (51). The speed reduction mechanism (3) has an external tooth gear (15) to which output of an electric motor (100) is transmitted, and a carrier (17) holding the external tooth gear (15). The pinion (52) and the shaft portion (51) are integrally formed, and the shaft portion (51) and the carrier (17) are spline-coupled to each other. A pair of main bearings (32, 33) are held by the case (2), and rotatably support the carrier (17).

Abstract: The first gear is fixed to a conveyance screw. The second gear is arranged in tandem with the first gear. The third gear meshes with the first gear and the second gear. The first support member supports the first gear to enable movement in one radial direction. The second support member supports the second gear to disable movement in the radial direction. The number of teeth of the first gear and that of the second gear are different. In the first gear, a first cam unit is formed. In the second gear, a second cam unit is formed. The both cam units converts a circumferential relative displacement, generated along with rotation of the third gear, between the first and second gears is converted into a displacement in the one direction of the first gear, in a predetermined period in accordance with the number of rotations of the third gear.

Abstract: Drive device (1) with electric motor and reduction gear driving an output unit (8) in a motor vehicle, comprising a brushless motor (2) having a rotor turning about a rotor axis (Y2) parallel to a main axis (Y), an elliptical reduction gear (3) interposed between the brushless motor (2) and the output unit (8), said elliptical reduction gear comprising an elliptical gear and a deformable flange, deformed by the elliptical gear when it rotates, and a control unit (4) arranged in the immediate proximity of the brushless motor (2) for controlling said brushless motor. Seat frame comprising such a device.

Abstract: A wheel drive unit includes: a planetary gear mechanism including a planetary gear and an internally-toothed gear; a casing integrated with the internally-toothed gear, a wheel being attached to the casing, and the casing transmitting rotation of the internally-toothed gear to the wheel; a bearing nut configured to prevent axial movement of the casing; and an oil seal provided more toward an interior of a vehicle than the planetary gear mechanism and axially fixed with respect the casing. An inner diameter of the detachment prevention member is smaller than an outer diameter of the externally-toothed gear.

Abstract: Disclosed are a reducer and an electric power steering apparatus having the same. According to the present invention, an input shaft, a driving shaft, and a pinion shaft are coaxially arranged. Thus, a conventional configuration, in which a motor inevitably protrudes, can be improved to prevent the motor from interfering with the other structures. Therefore, a layout configuration in an apparatus can be compactly formed.

Abstract: A reduction gear assembly integrates a stationary section having a stationary internal gear configuration, an output section having an output internal gear configuration, an input shaft and planetary carrier comprising an input shaft having a shaft rotational axis and a planetary gear cam having a planetary gear rotational axis, wherein the shaft axis and cam axis are offset. A planetary gear comprising a planet wheel first stage and a planet wheel second stage is rotationally assembled to the planetary gear cam. The first stage planet wheel engages with the stationary gear. The second stage planet wheel engages with the output gear. Rotation of the input shaft rotates the planetary gear about a circular path. Engagement between the first stage and the stationary gear rotates the planetary gear. Second stage teeth engage with the output gear. Difference in first stage and second stage teeth counts causes rotation of the output section.

Abstract: A wheel driving device includes: a reduction mechanism of which at least a part is disposed on an inside of a wheel; a casing; a relative rotation member rotating relative to the casing; a bearing disposed between the casing and the relative rotation member; and an oil seal sealing a space where the reduction mechanism is present, wherein an outer race of the bearing includes a main body portion of which an outer periphery is disposed on an inside of the casing, and an extending portion which extends from the main body portion in an axial direction and of which an outer periphery is exposed from the casing, and the oil seal abuts on the extending portion and the relative rotation member.

Abstract: A reduction gear assembly integrates a stationary section having a stationary internal gear configuration, an output section having an output internal gear configuration, an input shaft and planetary carrier comprising an input shaft having a shaft rotational axis and a planetary gear cam having a planetary gear rotational axis, wherein the shaft axis and cam axis are offset. A planetary gear comprising a planet wheel first stage and a planet wheel second stage is rotationally assembled to the planetary gear cam. The first stage planet wheel engages with the stationary gear. The second stage planet wheel engages with the output gear. Rotation of the input shaft rotates the planetary gear about a circular path. Engagement between the first stage and the stationary gear rotates the planetary gear. Second stage teeth engage with the output gear. Difference in first stage and second stage teeth counts causes rotation of the output section.

Abstract: A full-roller transmission structure comprises a housing, a first disk, a second disk, a rear disk, a front disk, and an input shaft. The housing includes a rear cover, an annular shell, and a front ring, which are detachably coupled together. Multiple inner rollers are disposed on an inner surface of the annular shell. The first and second disks are mounted in the annular shell and respectively provided with a plurality of first and second outer rollers capable of acting on the inner rollers. The rear disk is mounted between the first disk and the rear cover. Joining bolts and joining pins are employed to join the above disks. The input shaft includes a first eccentric journal for the first disk and a second eccentric journal for the second disk, the first eccentric journal being offset from the second eccentric journal at an angle of about 180 degrees.

Abstract: The invention relates to an actuator (10) for units comprising a planetary gear (14), especially a planetary differential gear, whose radially inward region is embodied as a hollow shaft and which is equipped with a drive unit and a driven shaft that cooperates with the unit to be operated. A drive shaft of the planetary gear (14) is connected to the drive unit and can be driven by the same. Said drive shaft is configured as a first hollow shaft (16) while the driven shaft is embodied as a second hollow shaft (40). A planet carrier (28) is provided that is connected to the first hollow shaft (16) or is embodied with the radially inward region thereof as a first hollow shaft (16) in such a way that a rotary movement is also performed by the planet carrier (28) when the first hollow shaft (16) rotates while the drive unit as well as the first (16) and the second hollow shaft (40) encompass a common axis of rotation.

Abstract: A method for electronically controlling a bicycle gearshift and a bicycle electronic system perform gearshifting. To perform this gearshifting, a displacement of an actuator from a current position (P) to a position (P1, PN) of engagement of a chain on an extreme toothed wheel of a gearshift group is started (203,205), a destination toothed wheel (PT) of the gearshift group is subsequently preselected (208), and the displacement is subsequently stopped (210) when the actuator is in a position (PT) of engagement of the chain on the destination toothed wheel (PT) of the gearshift group.

Abstract: A stepper motor suitable for use in a medical imaging environment has (a) a cylindrical central gear having an external surface with circumferentially distributed and radially directed teeth, (b) a shaft for mounting the central gear such that it is constrained to move in rotational motion about its centerline, (c) a cylindrical hoop gear having a bore with an internal surface having circumferentially distributed and radially directed teeth, (d) level arm crank mechanisms for mounting the hoop gear such that it is constrained to move in translational-circular motion about the central gear's centerline, wherein this central gear is further configured to fit within the hoop gear's bore in such a manner that a plurality of the central gear and hoop gear teeth intermesh and cooperate so that the planetary movement of the hoop gear causes the central gear to rotate, and (e) piston mechanisms for applying a fluid pressure driven force to specified points on the hoop gear so as to cause its movement.

Abstract: An eccentrically oscillating speed reducer 100 includes a case 110 having inner teeth 110a, a plurality of crankshafts having outer teeth, outer teeth gears 131 and 132 having outer teeth 131a and 132a brought in mesh with the inner teeth 110a of the case 110 and eccentrically moved by the crankshafts, a carrier 140 rotatably supporting the crankshafts and rotated to move relative to the case 110 by the crankshafts, and a cylindrical gear 180 brought in mesh with the outer teeth of the crankshafts for transmitting a power inputted to one crankshaft 121 of the plurality of crankshafts to remaining crankshafts, and the cylindrical gear 180 is rotatably supported by sliding friction.

Abstract: An oscillating internally meshing planetary gear system is provided in order to improve basic performance and reduce cost at the same time. The oscillating internally meshing planetary gear system has an internal gear and external gears internally meshing with the internal gear and is configured such that one of the external gears and the internal gear is oscillatingly rotated by means of eccentric bodies formed in an input shaft (eccentric body shaft). The system includes: a sliding motion-facilitating member intervening between an outer periphery of the eccentric body and the oscillating gear; and an eccentric body shaft bearing supporting the eccentric body shaft. In addition to this, the eccentric body shaft bearing and the sliding motion-facilitating member have the same configuration.

Abstract: A method for providing a compact rotary action torque within a larger system comprising a cross-roller bearing, generating a controllable electromagnetic field using a motor stator while interfacing the cross-roller bearing using a bull gear. The bull gear interfaces the cross-roller bearing and includes gear-teeth. An output plate includes a ring gear and supports shaft bearings. The ring gear interfaces the output plate and includes gear-teeth. A drive shaft holds a prime mover rotor and an eccentric and associates with the output plate via the shaft bearings. A gear train includes a meshing gear having gear-teeth for meshing with the gear-teeth of the bull gear and the gear-teeth of the ring gear and walks a minimal number of the gear-teeth for each rotation of the prime mover rotor; thereby, providing a transmitting force from the prime mover along the shortest-possible transmission path.

Abstract: A reduction gear includes a case including a hollow cylinder having teeth on its inner wall; a ring gear having outer teeth meshed with the teeth of the cylinder, and inner teeth; and an eccentric gear assembly mounted in the cylinder and including a hollow eccentric shaft including rear and front eccentric sections, and first and second gears rotatably secured onto the rear and front eccentric sections respectively. Rotating an input shaft in a first speed will rotate the eccentric shaft to rotate the first and second gears around the inner teeth of the ring gear eccentrically, thereby rotating the output shaft in a second speed lower than the first speed. The invention has an increased number of meshed teeth between each of the first and second gears and the ring gear so as to distribute a radial load to more teeth in rotation.

Abstract: A gear-type reduction unit, particularly for rotary platforms for sun-following devices, which comprises two main components, associated for rotation with respect to each other about a main rotation axis, a driving shaft, supported for rotation about the main axis, by a first one of the main components, a transmission element provided with two pinions, which are jointly connected and have an axis that is eccentric with respect to the main axis, a connecting member for mutual eccentric rotation of the transmission element with respect to the driving shaft, a first ring gear and a second ring gear with internal sets of teeth, which are jointly connected respectively to the first and second of the main components and mesh respectively with the first and the second of the pinions, and a play recovery device to take up slack between the pinions and the ring gears.

Abstract: A series of gear systems is disclosed, each of which comprises least one double-shaft, reversible planetary stage including a combination of an open positive gear system having lantern-gear teeth and an output system. “z1” represents the lantern-gear arrangement, and a number of teeth z2 is assigned to at least one planetary gear. The series of gear systems comprises several variants of size categories. Each of the several variants comprises internal gears in which external rollers are seated in grooves such that the intervals are different in the different variants and are produced by the regular elimination of individual external rollers.

Abstract: A device for adjusting two parts (2, 3) relative to one another, other than for a displacing device which is provided displacing a camshaft. The adjusting device is smooth and easy to operate, is self-locking, and ensures a backlash-free, continuous displacement of the two parts with a high degree of efficiency. The device includes a first part (2) having webs (2.3, 22.3) which are spaced apart in the circumferential direction and between which chambers (2.4) are provided, a second part (3) having an internal toothing (3.2, 13.2), and several teeth (7, 27) that are disposed at a distance from each other in the circumferential direction within the chambers and have an inner contact area (7.4) for resting against an eccentric drive member (6) as well as an outer contact area (7.5) for engagement with the internal toothing (3.2, 13.2). Rotary movements can be performed by the teeth (7, 27) located within the chambers (2.

Abstract: An eccentric gear for providing a speed difference between two machine elements which are rotatably journalled in relation to a reference member and individually rotatable around a symmetry axis. The gear includes two pairs of co-operating gear rims, one of which in each pair is eccentric in relation to the axis and one of which is in the form of a male gear rim with out-turned teeth, and the other one is a female gear rim with in-turned teeth. One of the gear rims in each pair is rigidly connected to a homologous gear rim in the other pair of gear rims and situated along a common axis that is eccentric and oblique in relation to the axis while the other gear rims are rotatable in relation to each other.

Abstract: An eccentric planetary gearing comprises two internally toothed gears, a double-ring externally toothed planetary gear and a planet carrier. The planet carrier is composed of support means for providing the rotatable mounting of the planet carrier itself and the rotatable mounting of the double-ring externally toothed planetary gear, said support means being integrated into a rigid member through two interjacent crescent-shaped sections consecutively disposed relative to one another. Each of the interjacent crescent-shaped sections is disposed within the space between the respective gear ring of the double-ring externally toothed planetary gear and the respective internally toothed gear.

Abstract: A seat reclining device has an external gear member and an internal gear member positioned in opposing relation, and a stopper member between the opposing gear members for regulating the reclining movement of the backrest relative to the seat cushion. The stopper member includes a first convex portion on the external gear (or internal gear) member and a stopper provided on the outer peripheral surface of the internal gear (or external gear) member. A second convex portion is also provided on the external gear (or internal gear) member. By engaging the second convex portion with a bore on a ring member that surrounds the periphery of the internal and external gear members, a part of the contact force between the stopper and the first convex portion is transmitted to the ring member.

Abstract: A speed change gear drive unit using planet-gears which is simple in construction, can be assembled easily, is low in costs, and can produce an extremely large change gear ratio is provided. The speed change gear drive unit using planet-gears 1 is comprised of an eccentric shaft part 4b eccentric with an input shaft part 4a and rotated integrally with the input shaft part 4a, a rolling member 5 having the same axis as the eccentric shaft part 4b and mounted rotatably on the eccentric shaft part 4b, two gear parts 5A and 5B formed on the rolling member 5, a gear part 6A meshed with one gear part 5A of the rolling member 5 and secured to a casing 2, and a gear part 7A meshed with the other gear part 5B of the rolling member 5 and rotated integrally with an output shaft part 7a.

Abstract: A gear drive transmission comprising an output shaft extending between front and rear portions of a housing. At the central portion of the shaft, there is a concentrically mounted drive gear section engaging first and second ring gears. A rotational and orbiting movement of the gear drive section causes rotation of a rotatably mounted ring gear to drive the shaft. There is a feedback mechanism positioning and controlling movement of the shaft. The shaft can have a single output end or two output ends.

Abstract: Planacentric gear box having at least one gear wheel with external teeth (8) meshing with a gear ring with internal teeth (5) whose number of teeth is slightly bigger than the number of teeth of the gear wheel (8), this gear wheel (8) orbiting inside the gear ring (5) by the means of two eccentrics (27)(28) synchronously and simultaneously driven by prime reducers having a common input shaft, planacentric gear box for which the eccentic bearings (23)(24) are located outside the gear ring (5), the gear wheel with external teeth (8) being fixed on a torque arm (14) passing beside the gear ring (5), this torque arm (14) having, diametricaly opposed, two protuberances (19)(20) receiving each the outer ring of the bearings for the eccentrics (27)(28) which are generating the orbitation of the gear wheel (8), the median planes of the gear wheel (8) and of the eccentric bearings (23)(24) being close one to the other.

Abstract: A transmission apparatus comprising a wave actuator having a wave-actuating disk mounted on an eccentric body through a rolling bearing; an oscillatory roller gear having Zh number of oscillatory rollers assembled in Zh radial slots of an oscillatory roller carrier, and a stationary gear with Zg number of inner teeth, where Zg=Zh.+-.1. The wave actuator pushes the oscillatory rollers to move radially. The oscillatory rollers roll along the inner surface of the stationary gear, driving the oscillatory roller carrier to rotate, thereby transmitting movement and power. Any one of the three components: the wave actuator, the oscillatory roller gear, and the stationary gear, can be chosen as a fixed component; the other two then form a speed-reducing or a speed-increasing transmission. When none of the components are fixed, they form a two-in/one-out differential transmission.

Abstract: A series of geared motors in which change gear ratios of 1/2-1/100 or a wider range of change gear ratios are realized in the single series based on the unified design concepts of low noise, high rigidity and high durability, and in which the separation, exchange, etc. of the individual speed change gears and motors proper of the geared motors are facilitated. In the series, a speed change mechanism in each of the geared motors constituting a group of "high" change gear ratios comprises a single-stage type planetary gear mechanism of oscillating inner gearing system, a group of "medium" change gear ratios comprises a single-stage type simple planetary gear mechanism, and a group of "low" change gear ratios comprises a modified simple planetary gear mechanism including a sun gear (302 in FIG. 1), a first planet gear (304A), a second planet gear (304B) which rotates unitarily with the first planet gear (304A) and which has a larger number of teeth than the first planet gear (304A), and an internal gear (306).

Abstract: Articulated fitting for seats having an adjustable backrest, in particular motor vehicle seats. The articulated fitting arranged on each longitudinal side of a seat has a stationary articulated part associated with the seat part and a swivelable articulated part associated with the backrest, these articulated parts being connected with one another via a swivel axle. The position of the two articulated parts relative to one another is determined by an adjusting and fixing device constructed as a gear unit. The swivel axle has an eccentric portion for supporting one articulated part and the swivel axle of each articulated fitting has a central receptacle serving to connect with a transmission rod so as to be fixed with respect to rotation relative thereto, which transmission rod couples the two articulated fittings of a seat with one another.

Abstract: A hybrid transmission provides a continuous range of reduced output speeds in a coaxial relationship about a common central axis within a surrounding cylindrical housing. The input shaft speed is increased through a planetary transmission having a sun gear fixed to a variable eccentric shaft. The eccentric shaft is surrounded by an orbiter and spaced anchor and drive vanes, which are interconnected by a plurality of anchor and drive vanes. Output speed is varied by change of the degree of eccentricity, using a worm gear drive interposed between inner and outer eccentrics within the eccentric shaft. control is achieved through shift rings that rotate a worm in response to external cable tension.

Abstract: A planetary speed-up and -down gearing comprising an external gear having outer teeth (7A) defined by a trochoidal curve and an internal gear having outer pins (9) internally meshed with the outer teeth (7A) of the external gear and being eccentric with respect to the external gear, the external gear and the internal gear being meshed and rotated eccentrically and swingingly relative to each other, so that phases of the external gear and the internal gear are shifted by a difference in the number of teeth between both said gears for each of the eccentric and swinging rotations, to thereby take out, as an output, rotation corresponding to the above difference in phase.

Abstract: A series of speed increasing and reduction gear having an inscribed meshing type planetary gear construction, in which within the same frame number (sub-series) with a tie-in dimension to a mating machine being constant, on both high and low speed change ratio sides, sufficient dynamical strength is secured, parts may be used in common with each other, and general-use bearings which are low in cost and high in accuracy can be employed.

Abstract: A speed reducer of the cycloidal type for robots and other industrial manipulators including a rotating ring which receives input at rapid speed is supported within a casing by a single end bearing which forms a pivot. The opposite end of the ring abuts against roller bearings associated with a pair of cams. Actuation fingers are oriented through housings created by openings in the cams and are connected to an output. The actuation fingers are arranged to be self-centered in the housings.

Abstract: The fixed flange with an inner toothing and the mobile flange with an inner toothing cooperate with a double satellite mounted in a ball bearing forming inside a housing for a composite cam. A sufficient excentration is provided between the diameter of the toothings of the double satellite and the intermediate part concentrical to the toothings of the fixed and mobile flanges so as to allow the composite cam made of two symmetrical and identical parts normally separated from one another at their upper portion by a spring which is slightly under tension and at their lower portion by a finger rigidly connected to an intermediate circular part mounted in bearing in the mobile and fixed flanges.

Abstract: A gear pair having a low tooth number differential and a total contact ratio of .xi..sub..upsilon. =.xi..sub..alpha. +.xi..sub..beta. .gtoreq.1 provided that the profile contact ratio .xi..sub..alpha. <1 and the face contact ratio .xi..sub..beta. >0, wherein the absolute value of the difference of addendum modification coefficients .vertline.X.vertline. is less than one or equal to zero, thus increasing the transmission efficiency. Additionally, a transmission assembly is provided including such a gear pair construction.