US 12,228,082 B2
Splined shaft assembly with piloting features
Erika Danckers, Rockford, IL (US); Andrew P. Grosskopf, Rockford, IL (US); Ted A. Martin, Winnebago, IL (US); Douglas J. Turner, Rockford, IL (US); and Aaron M. Finke, Janesville, WI (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on May 25, 2022, as Appl. No. 17/824,156.
Prior Publication US 2023/0383696 A1, Nov. 30, 2023
Int. Cl. F02C 7/32 (2006.01); F01D 5/02 (2006.01); F16D 1/10 (2006.01)
CPC F02C 7/32 (2013.01) [F01D 5/026 (2013.01); F05D 2220/323 (2013.01); F05D 2220/76 (2013.01); F05D 2260/4031 (2013.01); F16D 2001/103 (2013.01); F16D 2300/08 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A shaft assembly comprising:
a first shaft having a radial inner facing surface, wherein the radial inner facing surface includes:
a radial inner facing spline extending axially between first and second spline ends;
a radial inner facing projection, axially adjacent to one of the first and second spline ends of the radial inner facing spline, that extends to a radial inner facing projection surface; and
a radial inner facing projection seat, axially adjacent to another of the first and second spline ends of the radial inner facing spline; and
a second shaft having a radial outer facing surface, wherein the radial outer facing surface includes:
a radial outer facing spline extending axially between first and second spline ends;
a radial outer facing projection, axially adjacent to one of the first and second spline ends of the radial outer facing spline, that extends to a radial outer projection surface; and
a radial outer facing projection seat, axially adjacent to another of the first and second spline ends of the radial outer facing spline;
wherein:
the first shaft at least partially surrounds the second shaft so that the radial inner and outer facing splines mesh with each other;
the radial inner facing projection surface is disposed against the radial outer facing projection seat; and
the radial outer facing projection surface is disposed against the radial inner facing projection seat;
a mating ring assembly supported by the second shaft,
wherein the mating ring assembly defines a mating ring axial end surface; and
an input seal assembly supported by a stationary structure that at least partially surrounds the shaft assembly,
wherein the input seal assembly defines a seal assembly axial end surface;
wherein, the mating ring axial end surface and the seal assembly axial end surface are configured to face and engage each other.