Caterpillar Inc.

Matthew Elliott Giannis

Keith A Kabrick

Josh Dorothy

Steven M Cross

Michael R Jenkins

Kurt W Riggenbach

Mark Allen Garety

A stator is disclosed. The stator has a stator core that has stator poles protruding in a radial direction and a stator. The stator core has an axial groove formed on its outer surface along a longitudinal axis that is used to direct a cooling fluid from a first end of the stator core towards a second end of the stator core that is opposite the first end. Further, the stator core has an annulus groove formed on its outer surface, with the annulus groove in fluid communication with the axial groove. The annulus groove receives the cooling fluid from the axial groove, and is located between the first end and the second end of the stator core.

Fluid cooled stator with grooves in stator core

A carrier for a planetary gear train includes a hub disposed about an axis of rotation, the hub having an external cylindrical surface including a plurality of splines extending along a longitudinal direction, the longitudinal direction being parallel to the axis of rotation; and a deck extending away from the hub along a radial direction, the radial direction being transverse to the longitudinal direction. The deck defining a plurality of holes therethrough, each hole of the plurality of holes being configured to receive an axle of a planet gear of the plurality of planet gears, the hub being disposed between the plurality of holes and the axis of rotation along the radial direction. The splines have a value of a parameter (P) that is not less than 2.5 and not greater than 6.0.

Carrier for a planetary gear train

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Peoria, IL, United States of America

Matthew Elliott Giannis