Gearbox and support apparatus for gearbox carrier

A gearbox carrier having a central axis, the carrier configured to mount one or more rotating gears therein, the carrier including:

• spaced-apart forward and aft walls with respective forward and aft coaxial bores;
• a pin with forward and aft ends received in the forward and aft bores, respectively, the pin secured against axial movement relative to the carrier,
• an inner race mounted on the pin between the forward and aft ends in a manner secured against axial movement relative to the carrier, the inner race including two pairs of raised guides, each pair of raised guides defining a respective annular raceway, wherein the inner race is a single integral component incorporating both pairs of raised guides;
• a plurality of generally cylindrical rollers made of a ceramic material disposed rotatably in each of the raceways;
• and
• a planet gear mounted for rotation about the pin such that a cylindrical interior surface of the planet gear defines an outer race surrounding the rollers.

A planet gearbox for an epicyclic gearing arrangement that has only a single input and a single output and that includes a sun gear and a ring gear disposed circumferentially around the planet gearbox and the sun gear, the planet gearbox comprising:

• a gearbox carrier having a central axis, the carrier configured to mount one or more rotating gears therein, the carrier including spaced-apart forward and aft walls, each of the forward wall and the aft wall defining a respective coaxial bore;
• a pin received in the bores defined in the forward wall and the aft wall of the gearbox carrier;
• and
• an inner race incorporating a first pair of raised guides and a second pair of raised guides, the first pair of guides defining a forward raceway and the second pair of raised guides defining an aft raceway, the inner race connected to the pin and sized so that the inner race cannot move axially relative to the gearbox carrier,
• wherein the inner race is two separate inner races, each having raised guides.