A drive assembly for use in a piece of home equipment is provided including a center shaft having a central axis. A first drive component has a cavity formed therein and is configured to rotate about the central axis. A second drive component is at least partially nested within the cavity. The second drive component is configured to rotate about the central axis. The first drive component is operably coupled to a first rotary coupling and the second drive component is operably coupled to a second rotary coupling.

A drive assembly for use in a piece of home equipment is provided including a center shaft having a central axis. A first drive component has a cavity formed therein and is configured to rotate about the central axis. A second drive component is at least partially nested within the cavity. The second drive component is configured to rotate about the central axis. The first drive component is operably coupled to a first rotary coupling and the second drive component is operably coupled to a second rotary coupling.

A planetary roller power transmission device includes: a stationary ring; a sun shaft disposed radially inside the stationary ring so as to be concentric with an axis of the stationary ring; planetary rollers provided between the stationary ring and the sun shaft so as to be pressed against them; a carrier that rotatably supports the respective planetary rollers and rotates in conjunction with revolution of the planetary rollers; an oil-containing roller configured to be in contact with a peripheral surface of each planetary roller; and a support body having a support shaft that is formed to protrude toward one side in an axial direction of the stationary ring in a cantilevered manner and rotatably supports the oil-containing roller. An axis of the support shaft is inclined such that a distal end of the support shaft is closer to the axis of the stationary ring than a base end thereof.

Compound planetary friction drive comprising an input shaft driving a sun wheel, wherein said sun wheel engages planetary wheels, which planetary wheels are arranged with a first part having a first radius and a second part having a second radius that differs from the first radius, and where-in a ring cylinder is provided that is engaged by the planetary wheels such that the sun wheel is in frictional engagement with the first part of the planetary wheels and the ring cylinder is in frictional engagement with the second part of the planetary wheels, wherein the planetary wheels are hollow and compressible.

Compound planetary friction drive comprising an input shaft driving a sun wheel, wherein said sun wheel engages planetary wheels, which planetary wheels are arranged with a first part having a first radius and a second part having a second radius that differs from the first radius, and where-in a ring cylinder is provided that is engaged by the planetary wheels such that the sun wheel is in frictional engagement with the first part of the planetary wheels and the ring cylinder is in frictional engagement with the second part of the planetary wheels, wherein the planetary wheels are hollow and compressible.

Disclosed are embodiments of eccentric planetary traction drives for use in a driven turbocharger. The eccentric planetary provides torque-based loading of the traction interfaces in the traction drive. A loading planet has a larger outer diameter and has translative movement when torque is applied to the traction drive so that it is forced into a wedge gap between the turbo shaft and outer ring of the planetary drive. The torque capacity of the traction drive increases with an increase of torque demand.

Disclosed are embodiments of eccentric planetary traction drives for use in a driven turbocharger. The eccentric planetary provides torque-based loading of the traction interfaces in the traction drive. A loading planet has a larger outer diameter and has translative movement when torque is applied to the traction drive so that it is forced into a wedge gap between the turbo shaft and outer ring of the planetary drive. The torque capacity of the traction drive increases with an increase of torque demand.

A planetary roller power transmission device includes: a stationary ring; a sun shaft; planetary rollers provided between the stationary ring and the sun shaft so as to be pressed against them; a carrier that supports the planetary rollers so that the planetary rollers are rotatable and that rotates in conjunction with revolution of the planetary rollers; and a disk-shaped support plate supporting an oil-containing member that can be in contact with a peripheral surface of each planetary roller. Axial free movement of the support plate is restricted by the planetary rollers and the sun shaft or a member that is integrated with the sun shaft so as to be integrally rotatable. The support plate is structured so as to be rotatable relatively to the sun shaft in conjunction with rotation of the sun shaft due to contact with the sun shaft or the member.

A planetary roller power transmission device includes: a stationary ring; a sun shaft; planetary rollers provided between the stationary ring and the sun shaft so as to be pressed against them; a carrier that supports the planetary rollers so that the planetary rollers are rotatable and that rotates in conjunction with revolution of the planetary rollers; and a disk-shaped support plate supporting an oil-containing member that can be in contact with a peripheral surface of each planetary roller. Axial free movement of the support plate is restricted by the planetary rollers and the sun shaft or a member that is integrated with the sun shaft so as to be integrally rotatable. The support plate is structured so as to be rotatable relatively to the sun shaft in conjunction with rotation of the sun shaft due to contact with the sun shaft or the member.

A pivot holder of a friction-roller-type reduction gear has a pair of bearing parts configured to support a rotational shaft of an intermediate roller and having a pivot axis at an eccentric position from a center of the rotational shaft, and a bridging part configured to integrally couple the pair of bearing parts. A carrier has a holder support part configured to rotatably support the bearing parts. An interaxial distance between a center of the pivot axis and the center of the rotational shaft is equal to or smaller than a maximum radius of an outer diameter of the intermediate roller, and the center of the pivot axis is located on an applying line of a torque reaction force of transmission torque to be applied to the pivot holder.