An epicyclic gear train for a turbine engine includes a gutter with an annular channel. A rotating structure includes a ring gear. The rotating structure has an aperture that is axially aligned with the annular channel. Axially spaced apart walls extend radially outward relative to the rotating structure to define a passageway. The passageway is arranged radially between the aperture and the annular channel. The walls are configured to inhibit an axial flow of an oil passing from the aperture toward the annular channel.

An epicyclic gear train for a turbine engine includes a gutter with an annular channel. A rotating structure includes a ring gear. The rotating structure has an aperture that is axially aligned with the annular channel. Axially spaced apart walls extend radially outward relative to the rotating structure to define a passageway. The passageway is arranged radially between the aperture and the annular channel. The walls are configured to inhibit an axial flow of an oil passing from the aperture toward the annular channel.

An epicyclic gear train for a turbine engine includes a gutter with an annular channel. A rotating structure includes a ring gear that has an aperture that is axially aligned with the annular channel. Axially spaced apart walls extend radially outward relative to the rotating structure to define a passageway. The passageway is arranged radially between and axially aligned with the aperture and the annular channel. The walls are configured to inhibit an axial flow of an oil passing from the aperture toward the annular channel.

A transmission for an integral differential, the transmission having a fixed housing part, and a first planetary gear set defining an axis of rotation. The first planetary gear set has a planet carrier fixed to the fixed housing part to seal a lubricant chamber spatially delimited by the planet carrier and the fixed housing part, where at least a portion of the lubricant chamber extends around the axis of rotation. The first planetary gear set further includes planetary bearings, the planetary bearings being supplied with lubricant from the lubricant chamber. Moreover, the first planetary gear set includes planet gears, each of the planet gears being rotatably mounted on the planet carrier via at least one respective bearing of the planetary bearings. Additionally, the first planetary gear set includes a sun gear and a ring gear, each meshing with the planet gears.

A gearbox comprising a gearbox housing at least partially surrounding a cavity, an oil sump connected to the gearbox housing and surrounding another cavity, and a separating element separating the cavity from the other cavity and having a passage through which oil located in the cavity is fed into the other cavity. The passage is arranged in a plane at an intersection line between a first oil level upper side and a second oil level upper side. The oil is fed from the cavity into the other cavity exclusively through the passage. The separating element has a passage section and a separating section, the passage section protrudes from the separating section in the radial direction.

A drive system for powering the wheels of an electric vehicle is disclosed. The drive system includes an electric motor having a stator and a rotor, and one or more planetary gear sets operably connected to the electric motor and the wheels. The drive system includes one or more configurations that reduce packaging space, reduce the weight of the drive system, and/or provide cooling functions.

In one exemplary embodiment, an epicyclic gear train for a turbine engine includes a first shaft that is rotatable about an axis. A ring gear includes first and second portions each having an inner periphery with teeth. The first and second portions are secured to one another at a radial interface. At least one of the first and second portions includes a flange that extends radially outward. The flange is fixed to the first shaft in an axial direction by a fastening element. A carrier supports star gears that mesh with the ring gear. A sun gear meshes with the star gears and is coupled to a second shaft.

A gearbox assembly with emergency lubrication system includes a housing with an interior including a lubricant sump. The housing includes a breather port and a visual inspection port. The breather port is sized for at least one of relieving internal pressure or admitting air. The visual inspection port is located to allow visual inspection of a component in an interior of the housing. A transmission is disposed within the interior of the housing in fluid communication with the lubricant sump. An emergency lubricant reservoir is in fluid communication with the transmission through the breather port and/or the visual inspection port. A method of retrofitting a gear box assembly with an emergency lubrication system includes removing plugs from visual inspection ports of a gearbox housing, removing a breather from a breather port of the gearbox housing, and installing jet plugs into the respective visual inspection ports and breather port.

An epicyclic gear train for a turbine engine includes a gutter with an annular channel. A rotating structure includes a ring gear that has an aperture that is axially aligned with the annular channel. Axially spaced apart walls extend radially outward relative to the rotating structure to define a passageway. The passageway is arranged radially between and axially aligned with the aperture and the annular channel. The walls are configured to inhibit an axial flow of an oil passing from the aperture toward the annular channel.

A centrifugal supercharger includes a transmission case with an aperture therethrough proximal and parallel to its axis, the transmission case having a transmission cover affixed to its rear end and a compressor backplate affixed to its front end. The compressor backplate includes an oil passage radially located within the compressor backplate. The oil passage has an oil inlet opening near the outer edge of the compressor backplate and an oil jet near the compressor backplate bore to direct oil or other lubricating fluid under pressure upon internal bearings located within the transmission case.