Abstract: The frictional roller reducer has an input shaft, an output shaft, a pair of annular roller elements, a plurality of planetary rollers, a carrier, a pressing device, and a controller. The pressing device rotationally drives a cam disk by a pressing force adjusting motor, which causes an annular roller element of the pair of annular roller elements to displace in the axial direction. The controller, by adjusting the rotational drive of the pressing force adjusting motor, adjusts the surface pressure at the traction portions between rolling surfaces of the planetary rollers and an inner-diameter side rolling contact surface of the input shaft and outer-diameter side rolling contact surfaces of the pair of annular roller elements to a target value.

Abstract: A method of controlling a continuously variable electric drivetrain (CVED) including a high ratio traction drive transmission and at least one of a first motor-generator and a second motor-generator is disclosed. The method includes the steps of receiving a output speed, determining a kinematic output speed, and determining a slip state of the high ratio traction drive transmission based on a comparison of the output speed to the kinematic output speed.

Abstract: A method of controlling a continuously variable electric drivetrain (CVED) including a high ratio traction drive transmission and at least one of a first motor-generator and a second motor-generator is disclosed. The method includes the steps of receiving a an output speed, determining a kinematic output speed, and determining a slip state of the high ratio traction drive transmission based on a comparison of the output speed to the kinematic output speed.

Abstract: Disclosed is a two-piece shaft assembly for a driven turbocharger with a traction drive. The turbo shaft is attached to a turbine and compressor, and is inserted into a traction barrel that has traction surfaces to mate to the traction drive. In this way, the traction drive can be assembled with only the traction barrel, and the turbo shaft can be inserted through the barrel at the end to simplify assembly.

Abstract: The invention is a single motor power unit, suitably for being mounted onto a bicycle frame, which is fitted with a motor (7), related power supply (13), bearings (8), crank shaft pinion gearhead (11), propulsor pinion gearhead (10), planetary gearbox (15), and central processor unit (12). It is characterized in that the propulsor pinion gearhead (10) is connected to a pinion with dynamometric system (19), having an at least approximately identical axis, and to a planetary gearbox (15) therethrough, while the inside of the bearing (8) is in fixed connection with the crank shaft (9) and the outside of the bearing (8) is in fixed connection with the crank shaft pinion gearhead (11). The invention is also the procedure for placing the power unit according to claim suitably into a bicycle frame.

Abstract: Inventive embodiments are directed to components, subassemblies, systems, and/or methods for electric traction drives employing a continuously variable transmission (CVT) having a variator provided with a plurality of tilting traction planets and opposing traction rings. In one embodiment, an electric traction drive is provided with an electromotive device configured to transfer power to or from a traction sun of a CVT. In other embodiments, an electric traction drive is provided with an electromotive device that couples to certain components of a CVT such as a traction ring, a carrier assembly, and a main axle. Various inventive shifting assemblies having shift cams and shift cam cages can be used to facilitate adjusting the transmission speed ratio of a CVT. Various related devices include embodiments of, for example, a power input apparatus, a speed ratio shifter, a shift cam actuator, a shift nut, and a carrier assembly configured to support the tilting traction planets.

Abstract: A friction roller planetary gearing includes a first and a second sun which are axially displaceable with respect to one another and at least one of the suns is connected for conjoint rotation to a sun shaft. Stepped planets roll on the suns, on a first annulus and on a second annulus. The suns, the annuluses and the stepped planets are configured as friction rings. The second annulus is axially displaceable relative to the first annulus. A first torque-dependent axial displacement device controls a contact pressure between the suns and contact surfaces of the planets by using a torque-dependent axial displacement of at least one of the suns. A second torque-dependent axial displacement device controls a contact pressure between the annuluses and contact surfaces of the planets by using a torque-dependent axial displacement of at least one of the annuluses.

Abstract: An automatically compressing and friction-driven speed reduction device including a central shaft that is a cylinder, a planet wheel in a disc shape, and an inner compression ring and an outer compression ring sleeved outside the planet wheel; the maximum circumference part of the planet wheel is a planar excircle, and the surfaces on the two sides are machined into inclined planes having certain obliqueness; a planet shaft is installed in the middle of the planet wheel, and fixed on a housing; the planet shaft and the planet wheel are provided with a rolling needle therebetween. The device can automatically adjust frictional pressure in real time according to the magnitude of load torque, thus greatly reducing friction loss, improving the efficiency of friction-driven speed reduction device, and prolonging the service life of the friction-driven speed reduction device.

Abstract: Planetary roller gear drive with a spindle nut (1) that is arranged on a threaded spindle (2) and with a plurality of planets (3) that are arranged distributed around the periphery and are in rolling engagement with the threaded spindle (2) and the spindle nut (1). The threaded spindle (2) has a plurality of helical windings wound around the spindle axis forming at least one thread groove (8), and a sensor element (15) is arranged so that it cannot move in the axial direction relative to the spindle nut (1) and detects an axial displacement of the threaded spindle (2) and the spindle nut (1) relative to each other. The spindle nut (1) is supported so that it can rotate about the spindle axis on a housing (12) with the sensor element (15).

Abstract: Disclosed embodiments are directed to components, subassemblies, systems, and/or methods for continuously variable transmissions (CVT). In one embodiment, a CVT has a number of spherical planets in contact with an idler. Various idler assemblies can be used to facilitate to improve durability, fatigue life, and efficiency of a CVT. In one embodiment, the idler assembly has two rolling elements having contact surfaces that are angled with respect to a longitudinal axis of the CVT. In some embodiments, a bearing is operably coupled between the first and second rolling elements. The bearing is configured to balance axial force between the first and second rolling elements. In one embodiment, the bearing is a ball bearing. In another embodiment, the bearing is an angular contact bearing. In yet other embodiments, needle roller bearings are employed.

Abstract: A continuously variable transmission includes an input assembly. The input assembly coupled to receive input rotational motion. An output assembly is used to provide a rotational output and is coupled to a load. Moreover, an input/output planetary ratio assembly sets an input to output speed ratio between the input assembly and the output assembly. An input speed feedback control assembly is used to provide an axial speed force in response to a rotation from the input assembly on a shift rod. A torque feedback control assembly is used to provide an axial load force on the shift rod in an opposite direction from the axial speed force in response to a torque of a load coupled to the output assembly. In addition, a shifting member is coupled to the shift rod. The shifting member controls the input/output planetary ratio assembly based on a position of the shift rod.

Abstract: Disclosed is high torque traction drive. The high torque traction drive utilizes planet gears that engage the inner mesh of a ring gear. The planet gears are mounted in rollers that have inner traction surfaces that engage sloped ring traction surfaces on traction rings that are attached to the ring gear. The sloped traction interface causes the rollers to move inwardly when forced toward the traction rings. The inward force on the rollers creates a shaft traction interface between a shaft and outer traction surfaces on the roller, so that rotational mechanical energy is effectively transferred between the rollers, the shaft and the ring gear. High rotational speeds can be achieved with a high degree of torque. Speed reduction ratios of at least 10:1 or greater can be achieved.

Abstract: An infinitely variable transmission (IVT) having a rotatable input shaft arranged along a longitudinal axis of the transmission. In one embodiment, the input shaft is adapted to supply a lubricant to the interior of the transmission. In some embodiments, a stator assembly is coupled to, and coaxial with, the input shaft. The IVT has a plurality of planets operably coupled to the stator assembly. The planets are arranged angularly about the longitudinal axis of the transmission. In one embodiment, a traction ring is operably coupled to the planets. The IVT is provided with a housing that is operably coupled to the traction ring. The housing is substantially fixed from rotating with the input shaft. The traction ring is substantially fixed from rotating with the input shaft. In some embodiments, the IVT is provided with a lubricant manifold that is configured to supply a lubricant to the input shaft.

Abstract: Disclosed is a symmetrical traction drive that utilizes multi-diameter rollers having traction surfaces for transferring rotational mechanical energy between the shaft and a transfer gear. Multi-diameter rollers are mounted in carriers disposed between two substantially symmetrical ring gears. Sloped traction surfaces of the ring gears mate with inner traction surfaces on both sides of the multi-diameter rollers. Since force is applied to the inner traction surfaces on both sides of the multi-diameter rollers, forces are substantially equalized on each side of the multi-diameter rollers. An outer traction surface of the multi-diameter roller interfaces with a traction surface on the shaft. Speed reduction ratios of at least 20:1 or greater can be achieved.

Abstract: A planetary friction gear is enabled to make it possible to transmit comparatively great torque densities while providing a very high degree of smoothness of operation, preventing the unwanted slip-stick behavior in friction gears. The inventive gear is particularly suitable for actuators used in the immediate vicinity of humans in everyday life.

Abstract: A traction-drive type driving-force transmission mechanism has a sun roller. Planetary roller units are orbitally movable along an outer surface of the sun roller. A pressing member presses the planetary roller units toward the outer surface of the sun roller and allows a driving force to be transmitted by a traction force between the sun roller and the planetary roller units. Each planetary roller unit includes a first planetary roller rotatably supported by a first shaft and adapted to move orbitally along the outer surface of the sun roller, and a second planetary roller rotatably supported by a second shaft while allowing an outer surface thereof to contact an outer surface of the first planetary roller and the pressing surface, and adapted to press the outer peripheral surface of the first planetary roller against the outer peripheral surface of the sun roller during orbital movement of the planetary roller unit.

Abstract: A friction drive (10) having a plurality of planet assemblies (24A, 24B, 24C) pivotally mounted to a carrier (12), a sun shaft (14) rotatably mounted with the carrier (12) and having a first raceway (16), and an outer ring member (18) having a second raceway (22) concentric to the first raceway (16) and having a ring shaft (20). The plurality of planet assemblies (24A, 24B, 24C) frictionally engaged with the first raceway (16) and the second raceway (22) for transferring power between the sun shaft (14) and the outer ring member (18).

Abstract: The index table includes a rotary table for setting a workpiece for a machine tool; a rotary table shaft fixedly provided on the rotary table; a driving motor mechanism, which is a driving source; and a planetary roller speed-reduction mechanism having a sun roller, which is a motor output shaft of the driving motor mechanism, a ring fixed to the speed-reduction mechanism, a plurality of planetary rollers arranged at equal angular intervals between the sun roller and the ring in a pressurized state, and a planetary roller harness that fixedly supports a plurality of planetary roller shafts pivotally supporting the planetary rollers in a rotatable manner and is fixedly provided coaxially with the rotary table shaft.

Abstract: A continuously variable transmission includes an input shaft rotatably supported in a housing; a first speed change unit and a second speed change unit, provided within the housing and disposed facing each other symmetrically with respect to a plane normal to the axial direction of the input shaft, to continuously vary the speed of rotation of the input shaft using traction force; an output rotating gear supported to be able to rotate freely about the input shaft so that the rotation of the output rotating gear is synchronized with the rotation which has been varied in speed by the first speed change unit and the second speed change unit; and an output shaft. The torque of the input shaft can be doubled by the two speed change units while continuously varying the speed, and the thrust loads generated in the axial direction of the input shaft cancel each other out.

Abstract: A continuously variable transmission includes: (a) at least one external, three-dimensional cam; (b) at least four follower assemblies, each including a planet pulley, a roller shaft, and at least one follower roller, the roller shaft being mounted on the planet pulley, the roller shaft being connected to the follower roller; (c) at least two sun assemblies, each including a sun pulley, at least one sprag clutch, and a differential pulley, the differential pulley being mounted to the sun pulley, the sun pulley driving the sprag clutch; (d) an input assembly including a sun pulley shaft, the sun pulley shaft being connected to the at least two sun pulley assemblies through the respective sprag clutches; and (e) at least one differential mechanism connecting each of the sun pulleys to at least two of the planet pulleys; wherein the cam is external to the follower assemblies.

Abstract: A spindle unit (A) for effecting a manufacturing or repair procedure includes a spindle assembly (2) having a spindle (12) that holds a tool (B), an electric motor (4), and a friction drive transmission (6) located between the spindle assembly and the motor. The transmission includes a sun roller (86) driven by the motor, an outer ring (110) coupled to the spindle, and a pair of support rollers (90) located between the sun roller and outer ring to position the outer ring eccentric to the sun roller and create a wedge gap (126) between the sun roller and the outer ring. The transmission also has a loading roller (96) located at the wedge gap such that it can displace laterally and lodge tightly in the wedge gap. The spindle rotates in bearings (14, 16), one of which is a single row tapered roller bearing that transfers thrust loads developed during the procedure.

Abstract: A control system for a vehicle having first and second wheels is provided that includes a differential apparatus adapted to distribute torque between the first and second wheels and a traction controller for controlling operation of the differential apparatus from vehicle launch up to a predetermined vehicle speed. The traction controller is configured to engage the differential apparatus in a first operating state according to at least one vehicle operating parameter indicative of a low traction operating condition and to further control engagement of the differential apparatus in a second vehicle operating state during the low traction operating condition according to a difference between an actual vehicle yaw rate and a predetermined target vehicle yaw rate. The control system also includes a stability controller for controlling engagement of the differential apparatus at or above the predetermined vehicle speed.

Abstract: A traction-drive force transmission mechanism, includes a sun roller rotatable about a first axis and a plurality of shafts. Each is disposed on an adjacent axis inclined relative to the first axis. Planetary rollers are disposed along an outer peripheral surface of the sun roller and are supported respectively by the shaft. A carrier holds each of the shafts in the inclined posture and is adapted to be rotated about the first axis together with the planetary rollers. A pressing member pressingly moves each planetary roller in a direction for reducing a distance to the first axis so as to press each planetary roller against the outer peripheral surface of the sun roller. Thus a driving force can be transmitted to a traction force between the sun roller and each of the planetary rollers.

Abstract: A hinge mounting for an adjustment device of a motor vehicle seat having a first external gear wheel comprising a first inner toothed surface and a second external gear wheel comprising a second inner toothed surface. At least two planet wheels mesh with both the first and second inner toothed surfaces. A driving toothed sun wheel meshes with the at least two planet wheels. At least one of the planet wheels has a ring-shaped spring forming the toothed surface of the plane wheel that is radially elastically deformable and permanently exert a force onto the sun wheel, the first inner toothed surface and the second inner toothed surface; and/or the sun wheel comprises a ring-shaped spring forming at least a portion of the toothed surface of the sun wheel and configured to be radially elastically deformable and permanently exert a force onto the planet wheels and bias these with force into abutment with the first and second inner toothed surfaces.

Abstract: A traction-drive type driving-force transmission mechanism includes an output shaft and a sun roller that is rotatable about a first central axis. Shafts having respective second central axes are disposed respectively on corresponding secondary axes, of which is inclined relative to the first central axis in such a manner that each second central axis is aligned with the corresponding secondary axis. A pressing member is coupled to the output shaft. A plurality of speed-reduction rollers are disposed along an outer peripheral surface of the sun roller and are supported by the respective shafts. The pressing member presses each of the speed-reduction rollers against the outer peripheral surface of the sun roller to allow a driving force to be transmitted by a traction force between the sun roller and the speed-reduction roller.

Abstract: A traction-drive type driving-force transmission mechanism has a sun roller. Planetary roller units are orbitally movable along an outer surface of the sun roller. A pressing member presses the planetary roller units toward the outer surface of the sun roller and allows a driving force to be transmitted by a traction force between the sun roller and the planetary roller units. Each planetary roller unit includes a first planetary roller rotatably supported by a first shaft and adapted to move orbitally along the outer surface of the sun roller, and a second planetary roller rotatably supported by a second shaft while allowing an outer surface thereof to contact an outer surface of the first planetary roller and the pressing surface, and adapted to press the outer peripheral surface of the first planetary roller against the outer peripheral surface of the sun roller during orbital movement of the planetary roller unit.

Abstract: A traction drive transmission has an outer ring 40, a sun roller 10, support rollers 30, and one or more loading rollers 20. The outer ring 40 includes a raceway 42 presented inwardly. The sun roller 10 includes a raceway 12 presented outwardly toward the raceway 42 of the outer ring 40. The sun roller 10 is offset eccentrically with respect to the outer ring 40 so that a wedge gap 112 exists between the raceways 42, 12 of the outer ring 40 and sun roller 10. The support rollers 30 are located between the outer ring 40 and sun roller 10. Each support roller 30 has first and second raceways 36, 38 that have different diameters and contacts the raceway 12 of the sun roller 10 along its first raceway 36 and the raceway 42 of the outer ring 40 along its second raceway 38. Each loading roller 20 is located at the wedge gap 112 between the raceway 42 of the outer ring 40 and the raceway 12 of the sun roller 10.

Abstract: A traction-drive system that in one embodiment comprises an idler rotatable about a longitudinal axis, a plurality of rotatable and generally disc-shaped planet rollers each having an inner contact surface, a case contact surface and an idler contact surface, the inner contact surface being of a first diameter, the case contact surface being of a second diameter, and the idler contact surface being of a third diameter, the planet rollers distributed about the idler and each planet roller contacting the idler at its respective idler contact surface. The traction drive system of this embodiment also comprises an inner ring rotatable about the longitudinal axis adapted to contact the inner contact surface of each of the planet rollers, and a case ring adapted to contact the case contact surface of each of the planet rollers.

Abstract: A spindle unit (A) for effecting a manufacturing or repair procedure includes a spindle assembly (2) having a spindle (12) that holds a tool (B), an electric motor (4), and a friction drive transmission (6) located between the spindle assembly and the motor. The transmission includes a sun roller (86) driven by the motor, an outer ring (110) coupled to the spindle, and a pair of support rollers (90) located between the sun roller and outer ring to position the outer ring eccentric to the sun roller and create a wedge gap (126) between the sun roller and the outer ring. The transmission also has a loading roller (96) located at the wedge gap such that it can displace laterally and lodge tightly in the wedge gap. The spindle rotates in bearings (14, 16), one of which is a single row tapered roller bearing that transfers thrust loads developed during the procedure.

Abstract: A wedge loading mechanism for an eccentric planetary traction drive in which a roller having a flexibly mounted shaft is positioned between two raceways forming a convergent wedge. Rotation of either of the two raceways wedges the roller within the convergent wedge squeezing the roller between the two raceways thereby transmitting rotational motion and torque between the two raceways. The flexibly mounted shaft generates differences between an effective supporting stiffness of the roller and an contact effective stiffness at the points where the roller contacts the two raceways. The difference in the effective stiffness allow the roller to operate efficiently at smaller convergent wedge angles.

Abstract: An eccentric planetary traction drive transmission which includes at least two planetary rollers, sun roller member, and a carrier member. One of the planetary rollers is flexible and is positioned between and in contact with an outer ring member and the sun roller member. Rotation of either the outer ring member or the sun roller member wedges the flexible planetary roller within a convergent wedge gap which squeezes the flexible planetary roller between the outer ring member and the sun roll member. Friction between the flexible planetary roller, the sun roller member, and the outer ring member transmits rotational motion and torque between the outer ring member and the sun roller member. The other at least one supporting planetary roller is a supporting roller which supports the sun roller member and the carrier member. A plurality of bearings supports the sun roller member within the outer ring member and the at least one supporting planetary roller.

Abstract: A gear mechanism or motor includes a shaft, and output rotary bodies which are in engagement therewith. The bodies interact with the shaft in the radial direction, by bearing against the shaft, and interact in the axial direction of the shaft with an upper guideway body which can move in the axial direction and is loaded toward the bodies. An interaction region of the shaft has a circular cross section. A guideway of the guideway body is structured in terms of its height over its periphery.

Abstract: A coordinated brake control system of a hybrid brake system is arranged to determine a total braking torque command value according to a vehicle operating condition, to distribute the total braking-torque command value to regenerative braking-torque command value and the hydraulic braking-torque command value, to calculate a reference model response value relative to a wheel-cylinder hydraulic pressure command value, on the basis of a braking force reference model taking account of a delay of the actual hydraulic pressure in the hydraulic control system relative to the wheel-cylinder hydraulic pressure command value, and to correct the regenerative braking-torque command value according to a braking torque control error between the estimated braking torque actual value and the reference model response value. The corrected regenerative braking-torque command value is employed in the control of the regenerative brake apparatus.

Abstract: An eccentric planetary traction drive transmission in which a planetary roller is positioned between and in contact with an outer ring member and a sun roller member. Rotation of either the outer ring member or the sun roller member wedges the planetary roller within a convergent gap which squeezes the planetary roller between the outer ring member and the sun roll member. Friction between the planetary roller, the sun roller member, and the outer ring member transmits rotational motion and torque between the outer ring member and the sun roller member. An internal carrier with a plurality of bearings supports the sun roller member within the outer ring member.

Abstract: A traction drive transmission is organized about a center axis and includes a sun roller having first and second inner raceways. The raceways are tapered such that their large ends are presented toward each other. There is provided a first plurality of planet rollers arranged in a row between a first inner raceway and a first outer raceway. The first plurality of rollers have a first tapered side face that contacts the first inner raceway and a second tapered side face that contacts the first outer raceway. A second plurality of planet rollers is arranged in a row between the second inner raceway and the second outer raceway and has a first tapered side face that contacts the second inner raceway and a second tapered side face that contacts the second outer raceway.

Abstract: An auxiliary equipment of driving force for bicycle is provided wherein a reduction gear of the traction roller type is adopted, and the contact pressure between the outer peripheral surfaces of the traction rollers and the outer peripheral surface of the rotatable shaft and the inner peripheral surface of the outer ring is controlled corresponding to the torque to be transmitted, so that the battery is less exhausted and that the traveling distance of the electrically power augmented bicycle is prolonged.

Abstract: A continuously variable transmission device of the type having planetary members (25) in rolling contact with radially inner (23) and outer (26) races each comprising two axially spaced parts, with control means (30) for selectively varying the axial separation of the two parts of one race and thus the radial position of the planetary members (25) in rolling contact therewith, in which there are provided means sensitive to the torque applied to a drive-transmitting member of the transmission operable both to determine the compensating variation in the separation of the two parts of the other race and thus the transmission ratio of the device and to vary the forces exchanged between the planets (25) and the races (23, 26) normal to the interface between them.

Abstract: A shaft coupling structure configured to maintain and exert inherent functions as well as to utilize surrounding empty space unused to provide its own speed change function. The shaft coupling structure includes a first shaft and a second shaft coaxially opposed to each other, and a member having a shaft insertion hole to which the first shaft and the second shaft are inserted at the vicinities of their shaft ends, rotational power transmission between the shafts being effected by the member. The member is divided into first-shaft side and second-shaft side so as to form a first transmission member and a second transmission member, respectively. A plurality of planetary rollers and a ring roller are arranged around the first transmission member. The plurality of planetary rollers making rolling contact with the inner periphery of the ring roller. The ring roller is engaged with an external non-rotational member for rotational restraint.

Abstract: A friction-roller speed changer has three intermediate rollers (12a, 12b, 12c). Two rollers (12a, 12b) of which act as a wedge roller and can be moved into the narrower area of an annular space (10) by the transmission of power, wherein during power transmission from the input side in the normal state to the output side. The other intermediate roller (12a or 12b), which does not act as the wedge roller, moves into the wider area of the annular space (10) against the elastic force of the spring (14) whereby transmission efficiency for bidirectional rotation is maintained while preventing backflow of power.

Abstract: A power transmission system for a vehicle has a first power transmission path having a forward-reverse shift mechanism and a reduction gear, a second power transmission path having an infinitely variable gear, and a path switching mechanism which switches the power transmission path between the first and second power transmission paths according to the running condition of the vehicle. The infinitely variable gear is a toroidal speed change mechanism having an output disk fixed to the output shaft of the power transmission system, an input disk which can be displaced in the axial direction of the output shaft and a roller which is in contact with both the input and output disks to rotate about an axis in response to rotation of the input disk and transmit rotation of the input disk to the output disk, the transmission ratio of the toroidal speed change mechanism being changed by changing the inclination of the axis about which the roller rotates.

Abstract: An epicyclic assembly to transmit torque and motion between externally connectable members using cylindrical elements maintained in rolling contact by surrounding rings and helical coils, the latter being in continuous helical paths. The rings and helical coils provide an effectively cylindrical inner surface of a diameter determined by the diameters of the cylindrical elements within it. Axial pressure exerted on the rings is redirected inwardly by angled surfaces of the rings to cause the helical coils to contract radially onto the cylindrical elements.

Abstract: A traction type transmission characterized in that a planetary roller mechanism is constituted by a sun roller, a plurality of planetary rollers disposed equidistantly around the sun roller and an exterior ring disposed outside the planetary rollers, the sun roller is connected to a high speed shaft while either the exterior ring or the planetary shafts of the planetary rollers are connected to a low speed shaft through a rotary member; the planetary rollers are strongly pressed to the outer periphery of the sun roller in the presence of an oil and two slope surfaces of the inner periphery of the exterior ring are strongly pressed to both shoulder portions of the outer periphery of these planetary rollers in the presence of an oil, respectively.