A nutational cycloidal reducer reduces an input speed to an output speed by a reduction ratio. The reducer includes a timing ring having an internal wall with a series of longitudinally extending tooth profiles, an output connected to the timing ring, a pulley having a central opening, a series of longitudinally extending tooth profiles and a plurality of circumferentially disposed pin bores. An input shaft has first and second shaft portions. The first portion is concentric with a longitudinal axis and the second portion is eccentric to the axis. A plate has a central opening. The pulley is positioned in the timing ring with some of the pulley and timing ring tooth profiles engaged with each other. The second shaft portion is positioned in the pulley and the plate and drives the pulley in a nutational movement. The pulley has one or more less tooth profiles than the timing ring, such that the reduction ratio is defined by # of timing ring tooth profiles/(# of timing ring tooth profiles−# of pulley tooth profiles).

A nutational cycloidal reducer reduces an input speed to an output speed by a reduction ratio. The reducer includes a timing ring having an internal wall with a series of longitudinally extending tooth profiles, an output connected to the timing ring, a pulley having a central opening, a series of longitudinally extending tooth profiles and a plurality of circumferentially disposed pin bores. An input shaft has first and second shaft portions. The first portion is concentric with a longitudinal axis and the second portion is eccentric to the axis. A plate has a central opening. The pulley is positioned in the timing ring with some of the pulley and timing ring tooth profiles engaged with each other. The second shaft portion is positioned in the pulley and the plate and drives the pulley in a nutational movement. The pulley has one or more less tooth profiles than the timing ring, such that the reduction ratio is defined by # of timing ring tooth profiles/(# of timing ring tooth profiles−# of pulley tooth profiles).

A hybrid powertrain includes an output shaft, a combustion power section for providing a first torque, an electric power section for providing a second torque, and an output transmission for transmitting the first torque between the combustion power section and the output shaft and transmitting the second torque between the electric power section and the output shaft. The combustion power section includes an internal combustion engine with a combustion shaft for outputting the first torque, a generator with a generator shaft for converting the first torque into electric energy, and a variable belt transmission for variably translating the first torque. The belt transmission includes a combustion-side cone pulley pair with a first axially movable pulley arranged on a generator shaft side, an output-side cone pulley pair with a second axially movable pulley, and a belt for variably torque-transmittingly connecting the combustion-side cone pulley pair to the output-side cone pulley pair.

A high speed ratio drive system is formed of planet rollers, each having varying diameter, an outer fixed ring in contact with one diameter of the planet rollers, and an outer drive ring in contact with another diameter of the planet rollers. An inner drive element is provided by a sun drive roller in contact with the planet rollers or by a planet carrier. Preferably the system has an axial reflective symmetry minimizing twisting forces on the planet rollers.

A high speed ratio drive system is formed of planet rollers, each having varying diameter, an outer fixed ring in contact with one diameter of the planet rollers, and an outer drive ring in contact with another diameter of the planet rollers. An inner drive element is provided by a sun drive roller in contact with the planet rollers or by a planet carrier. Preferably the system has an axial reflective symmetry minimizing twisting forces on the planet rollers.

The present disclosure relates to a planetary rolling micro-jacking device comprising a bottom plate, a rotating plate and a top plate mounted on a central shaft. There are at least three planetary thread rollers provided between the rotating and the top plates. The rotating and the top plates are provided with multiple annular tooth grooves. The annular tooth grooves of the rotating plate and the annular tooth grooves of the top plate engage with the thread of the planetary thread rollers. The planetary thread rollers roll between the rotating and the top plates, and rotate around the central shaft.

The present disclosure relates to a planetary rolling micro-jacking device comprising a bottom plate, a rotating plate and a top plate mounted on a central shaft. There are at least three planetary thread rollers provided between the rotating and the top plates. The rotating and the top plates are provided with multiple annular tooth grooves. The annular tooth grooves of the rotating plate and the annular tooth grooves of the top plate engage with the thread of the planetary thread rollers. The planetary thread rollers roll between the rotating and the top plates, and rotate around the central shaft.

The present disclosure relates to a planetary rolling micro-jacking device comprising a bottom plate, a rotating plate and a top plate mounted on a central shaft. There are at least three planetary thread rollers provided between the rotating and the top plates. The rotating and the top plates are provided with multiple annular tooth grooves. The annular tooth grooves of the rotating plate and the annular tooth grooves of the top plate engage with the thread of the planetary thread rollers. The planetary thread rollers roll between the rotating and the top plates, and rotate around the central shaft.

The present disclosure relates to a planetary rolling micro-jacking device comprising a bottom plate, a rotating plate and a top plate mounted on a central shaft. There are at least three planetary thread rollers provided between the rotating and the top plates. The rotating and the top plates are provided with multiple annular tooth grooves. The annular tooth grooves of the rotating plate and the annular tooth grooves of the top plate engage with the thread of the planetary thread rollers. The planetary thread rollers roll between the rotating and the top plates, and rotate around the central shaft.

Disclosed is a fluid damping system for a planetary traction drive designed for a driven turbocharger on an engine. The planetary traction drive has a plurality of double roller planets that are each supported by two planet hearings, one at each end of the double roller planet. Each planet bearing has a fluid damping system that consists of a radial squeeze film damper that feeds fluid to an axial squeeze film damper to absorb vibrations and dissipate kinetic energy in the planetary traction drive.