Oil pump receiving bore lip
AssigneeTextron Innovations Inc.
InventorsAmanda Christine Savage, Charles Hubert Speller
Life of this patent
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Abstract
A gearbox system for a rotorcraft includes a gearbox housing, an oil pump receiving bore formed into the gearbox housing and having formed therein a first opening having a first diameter and a second opening, and an oil pump positioned within the oil pump receiving bore. The second opening is bounded by a lip that extends radially into the second opening, the second opening having a second diameter that is smaller than the first diameter.
Claims20
An oil pump system, the oil pump system comprising:
- a gearbox having formed therein an oil pump receiving bore, the oil pump receiving bore having a first opening having a first diameter and a second opening having a second diameter smaller than the first diameter, wherein the first opening and the second opening are coaxial;
- an oil pump comprising a pump housing positioned within the oil pump receiving bore;
- a pump shaft extending from the oil pump through the second opening to a gearbox shaft;
- and
- an outer diameter of the oil pump nearest the second opening is greater than the second diameter.
A gearbox system for a rotorcraft, the gearbox system comprising:
- a gearbox housing;
- an oil pump receiving bore formed into the gearbox housing and having formed therein a first opening having a first diameter and a second opening;
- the second opening bounded by a lip that extends radially inward, the second opening having a second diameter that is smaller than the first diameter;
- an oil pump comprising a pump housing, a gerotor, and a cover positioned within the oil pump receiving bore, wherein an outer diameter of the oil pump nearest the second opening is greater than the second diameter;
- a pump shaft coupled to the gerotor and extending through the second opening;
- and
- a mounting plate connected to the gearbox housing and closing the first opening.
A method of installing an oil pump into a rotorcraft gearbox, the method comprising:
- inserting a first end of an oil pump into a first opening of an oil pump receiving bore of the rotorcraft gearbox, the first opening having a first diameter, wherein the oil pump comprises a cover and gerotor housed by a pump housing, a pump shaft coupled to the gerotor and extending away from the first end, and a mounting plate opposite from the first end;
- positioning the first end of the oil pump adjacent a second opening of the oil pump receiving bore with the pump housing inside of the oil pump receiving bore and the pump shaft extending through the second opening, the second opening having a second diameter that is smaller than the first diameter and an outside diameter of the first end;
- and
- securing the mounting plate to the rotorcraft gearbox.
Dependencies are inferred from the claim text.