US 11,859,693 B2
Gear timing with helical spline and shims
Matthew Allen Slayter, Rockford, IL (US); and Paul F. Fox, Loves Park, IL (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Mar. 6, 2020, as Appl. No. 16/811,872.
Prior Publication US 2021/0277978 A1, Sep. 9, 2021
Int. Cl. F16H 1/08 (2006.01); F16H 1/10 (2006.01); F16H 57/00 (2012.01); F16H 55/17 (2006.01)
CPC F16H 1/08 (2013.01) [F16H 1/10 (2013.01); F16H 57/0025 (2013.01); F16H 55/17 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A gear assembly comprising:
a first gear wheel comprising a shaft bore defining a primary axis, including a first gear wherein a plurality of teeth of the first gear are oriented in a first direction and a second gear wherein a plurality of teeth of the second gear are oriented at an angle relative to the primary axis between parallel and perpendicular;
a second gear wheel configured to match the second gear of the first gear wheel including an outer gear and an inner gear wherein a plurality of teeth of the inner gear are oriented parallel to the plurality of teeth of second gear;
a retention member configured to secure the second gear wheel on the first gear wheel; and
a plurality of shims configured to space the second gear wheel from the first gear wheel and the second gear wheel from the retention member, wherein at least one first shim of the plurality of shims disposed between the first gear wheel and the second gear wheel is configured to rotationally limit the second gear wheel in a first direction and wherein at least one second shim of the plurality of shims disposed between the second gear wheel and the retention member, wherein the at least one first shim is configured to rotationally position the second gear wheel by fixing its axial position along inner gear of the first gear wheel to adjust a timing relationship of the second gear wheel relative to the first gear wheel, wherein the second gear of the first gear wheel and the inner gear of the second gear wheel are helical splines pitched to position the second gear wheel on the first gear wheel with less than one full rotation of the second gear wheel relative to the first gear wheel along the helical splines, wherein the first gear wheel includes a flange separating the at least one first shim from the first gear of the first gear wheel.