An epicyclic gearbox that includes a sun gear, a ring gear, and a plurality of planet gears. The planet gears rotatably couple to the ring gear and the sun gear. Pins coupled to or formed as part of a carrier extend into the planet gears. A sleeve overhangs a notch defined, in part, by at least one of the pins. The pins, the carrier, the sleeve, or any combination of one or more of the pins, the carrier, or the sleeve are capable of flexing.

A planet gear housing assembly in an epicyclical gear assembly comprises an aft planet gear assembly and a forward planet gear assembly. The aft planet carrier assembly comprises an aft flange defining a central aperture and an annular mounting flange positioned forward of and coaxial with said central aperture, said mounting flange forming a forward facing mounting surface comprising a curvic structure. The forward planet carrier assembly comprises a forward flange defining a central aperture and an annular mounting flange positioned aft of and coaxial with said central aperture, said mounting flange forming an aft facing mounting surface comprising a curvic structure. The curvic structures of the mounting surfaces are positioned relative to each other to thereby form a static curvic joint.

A transmission includes a first housing part and a second housing part connected at least by a friction-locked connection with the aid of a clamp ring.

An electric drive unit includes an electric motor, a differential assembly, and a double-helical gearset positioned between and interconnecting the electric motor and the differential assembly and adapted to transfer rotational motion from the electric motor to the differential assembly, the double-helical gearset including a driving double-helical gear rotationally mounted onto a transfer shaft of the electric motor and including a right-hand helix, a left-hand helix and a gap extending circumferentially between the right-hand helix and the left-hand helix, and a driven double-helical gear rotationally mounted onto a housing of the differential assembly and including a right-hand helix, a left-hand helix and a gap extending circumferentially between the right-hand helix and the left-hand helix, and a park gear positioned within the gap between the right hand helix and the left hand helix of one of the driving double-helical gear and the driven double-helical gear, wherein one of the driving double-helical gear and the driven double-helical gear is axially moveable.

The gear is used for driving pneumatic turbomachinery while providing insignificant impact of the tolerances on the performance parameters leading to extended service life. It comprises a sun shaft (1) supported and driven by at least three planet wheels (2) rotating around their axes, on each side of which in axial direction there is an identical radially-elastic flat frame (7) in the shape of a flat planar closed-contour element having at least three annular bearing slots (7.1) with a cylindrical hole accepting the respective bearings (4) of the planet wheels (2). The bearing slots (7.1) are equidistant from the center of the frame (7) and each two adjacent bearing slots (7.1) are connected to one another via a respective curvilinear bridge (7.2) whose inner bend, towards the center, has an ear formed thereon (7.4) accepting the respective support pillar (6) fixed to the rear housing (5).

A transmission includes a first housing part and a second housing part connected at least by a friction-locked connection with the aid of a clamp ring.

An epicyclic gear train comprising a sun gear, an outer ring gear, and a plurality of planet gears carried by a common planet carrier. The planet carrier comprises a support and a plurality of spindles carried by the support, each spindle having a carrier segment extending away from the support to a distal end, each planet gear being arranged around a the carrier segment. Each distal end is separated from another distal end that is adjacent thereto by a distance, and the epicyclic gear train includes a holder system for maintaining the distance within a predefined range regardless of the force applied to each spindle.

The invention relates to a planet-carrier (230) cage (234) for a turbomachine speed reducer (110) with a planetary gear set, said cage being designed such that it can contain a central sun wheel (151) with an axis of rotation X and an annular row of planets (150) arranged around the axis X and engaged with said sun wheel, the cage comprising axial receiving elements (280) on the periphery thereof, for receiving axial arms (282) secured to a barrel (242) of said reducer, a substantially radial finger (288) passing through each receiving element and being used to guide the rotation of a ball joint (286) carried by one of said arms, characterised in that each finger comprises means (294, 295) for lubricating said ball joint.

An engine includes a static frame member; a spool configured to rotate relative to the static frame member during operation of the engine; a gearbox coupled to the spool; and a gearbox coupling assembly mounting the gearbox to the static frame member using a plurality of moveable connection members, each moveable connection member including a sliding connection allowing for movement of the gearbox relative to the static frame member in a plane perpendicular to an axial direction of the engine.

An epicyclic gear train comprising a sun gear, an outer ring gear, and a plurality of planet gears carried by a common planet carrier. The planet carrier comprises a support and a plurality of spindles carried by the support, each spindle having a carrier segment extending away from the support to a distal end, each planet gear being arranged around a the carrier segment. Each distal end is separated from another distal end that is adjacent thereto by a distance, and the epicyclic gear train includes a holder system for maintaining the distance within a predefined range regardless of the force applied to each spindle.