A planet carrier for a planetary gear set includes a pair of carrier plates. A planet gear is positioned between the carrier plates of the pair of carrier plates. A pin extends between the carrier plates of the pair of carrier plates through the planet gear such that the planet gear is rotatable relative to the carrier plates of the pair of carrier plates on the pin. A retainer is removably mounted to one of the pair of carrier plates. The pin is positioned against the retainer at the one of the pair of carrier plates. The pin may be rotatable relative to the carrier plates of the pair of carrier plates.

A gearbox includes a planetary stage having at least two planetary gear trains which are connected in parallel and flexibly coupled to one another. Each planetary gear train has individual components which are each defined by a torsional stiffness, with a power flow through the planetary gear trains being controlled by coordinating the torsional stiffness of the individual components of the planetary gear trains.

Systems and methods for a drilling machine. The drilling machine system, in one example, includes a gearbox with a planetary reduction and a floating input coupling directly coupled to or formed in a sun gear shaft that is included in the planetary reduction. Further, in the drilling machine system, the input coupling is unsupported by a bearing and rotational axes of the floating input and the sun gear shaft are coaxially arranged.

Embodiments of a compliant shaft for engines are provided herein. In some embodiments, a compliant shaft for a turbine engine may include: a body having a first end configured to be coupled to a shaft of a turbine and a second end coupled to a gear of a gear box, wherein at least a portion of the body is flexible.

A rotation/translation converter gear unit having a helical gear and a planetary gear for driving the helical gear. A spindle nut of the helical gear forms a planet carrier for planet wheels of the planetary gear. Situated between the planetary gear and the helical gear is an axial friction bearing, that at the same time forms a centering element which centers a sun wheel of the planetary gear between the planet wheels. In particular, the rotation/translation converter gear unit is used to drive a piston of a pressure generator for a brake control of a hydraulic vehicle brake system.

The present disclosure includes a ring gear, a final gear meshed with the ring gear, a carrier rotatably supporting the final gear, a sun gear having a rotation axis parallel to the rotation axis of the ring gear and installed to have a variable inter-axis distance, the sun gear being configured to receive power from outside, a link mechanism interconnecting the sun gear and the final gear so a connection angle changes depending on a change in the inter-axis distance between the sun gear and the ring gear, a gear train provided in the link mechanism to continuously establish a power transmission state between the sun gear and the ring gear regardless of the change in the inter-axis distance between the sun gear and the ring gear, and a carrier housing integrally coupled to the carrier and encasing the sun gear, the carrier, the ring gear, and the link mechanism.

A turbine engine having a turbo-engine coupled to an input shaft, a fan coupled to an output shaft, and a gearbox assembly. A torque is transferrable from the input shaft to the output shaft through the gearbox assembly. The gearbox assembly has a split sun gear rotationally coupled to the input shaft, a plurality of planet gears located radially outward of, and intermeshing with, the split sun gear, and a single piece ring gear located radially outward of, and intermeshing with, the plurality of planet gears. The split sun gear includes a forward sun gear and an aft sun gear separate from the forward sun gear, and the forward sun gear and the aft sun gear are each rotationally coupled to the input shaft.

The present disclosure includes a carrier supported on the vehicle body. a ring gear installed such that a rotation axis thereof is concentric with a central axis of the carrier, a wheel hub splined to the ring gear, a sun gear having a rotation axis parallel to the rotation axis of the ring gear and installed to have a variable inter-axis distance, the sun gear being configured to receive power from outside, a final gear supported on the carrier to be meshed with the ring gear, a link mechanism interconnecting the sun gear and the final gear such that a connection angle changes depending on a change in the inter-axis distance between the sun gear and the ring gear, and a gear train to continuously establish a power transmission state between the sun gear and the ring gear regardless of the change in the inter-axis distance.

A mounting assembly for a gearbox assembly of a gas turbine engine includes at least one mounting member configured to mount a gear of the gearbox assembly to a component of the gas turbine engine, the at least one mounting member characterized by a lateral impedance parameter, a bending impedance parameter, and a torsional impedance parameter. A gas turbine engine includes the mounting assembly. The at least one mounting member may be a flex mount, a fan frame, or a flex coupling. The gear includes a first gear that is a split sun gear including a forward sun gear and an aft sun gear separate from the forward sun gear. The forward sun gear and the aft sun gear are each rotationally coupled to a rotating shaft of the gas turbine engine.

Gear systems provide backlash control at low loading and effective load carrying at increased loading. A gear system with backlash control includes at least two meshing gears. One of the gears has a gear section configured for carrying loads and another gear section configured to control backlash. The gear sections are connected together by a compliant section that has features that reduce stiffness so that the gear sections are moveable relative to each other. One gear section is biased relative to the other gear section so that its teeth are preloaded against the teeth of the first gear.