Shaft assembly for split torque gear box
AssigneeLockheed Martin Corporation
InventorsYuriy Gmirya, Bruce P. Plasse
Life of this patent
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Abstract
A coaxial rotary-wing aircraft including a first rotor rotatable about a first axis in a first direction, a second rotor rotatable about the first axis in a second direction to provide lift, and a gearbox. The gearbox includes a first gear oriented to rotate about an axis, a second gear spaced from the first gear and oriented to rotate about the axis, and a shaft assembly extending between the first gear and the second gear. The shaft assembly includes a shaft, a lock mechanism, and a retaining extension. The shaft has a first end coupled with the first gear and a second end coupled with the second gear, the second end including at least one recess formed on an end face. The lock mechanism is removably coupled to the second end of the shaft.
Claims19
A rotary-wing aircraft comprising:
- a first rotor rotatable about a first axis in a first direction to provide lift;
- and
- a gearbox comprising
- a first gear oriented to rotate about an axis,
- a second gear spaced from the first gear and oriented to rotate about the axis, and
- a shaft assembly extending between the first gear and the second gear, the shaft assembly including,
- a shaft having a first end coupled with the first gear and a second end coupled with the second gear, the second end including at least one recess formed on an end face,
- a lock mechanism removably coupled to the second end of the shaft, the lock mechanism including a base plate with a first side and a second side, a first projecting portion extending axially from the first side and configured to engage with the at least one recess on the shaft, and a second projecting portion extending axially from the second side, and
- a retaining extension including an aperture configured to receive the second projecting portion of the lock mechanism through the aperture;
- wherein the retaining extension is configured to be coupled to the lock mechanism by a fastening mechanism.
A split torque gearbox comprising:
- a first gear oriented to rotate about an axis;
- a second gear spaced from the first gear and oriented to rotate about the axis;
- and
- a shaft assembly extending between the first gear and the second gear, the shaft assembly including,
- a shaft having a first end coupled with the first gear and a second end coupled with the second gear, the second end including at least one recess formed on an end face;
- a lock mechanism removably coupled to the second end of the shaft, the lock mechanism including a base plate with a first side and a second side, a first projecting portion extending axially from the first side and configured to engage with the at least one recess on the shaft, and a second projecting portion extending axially from the second side, and
- a retaining extension including an aperture configured to receive the second projecting portion of the lock mechanism through the aperture;
- wherein the retaining extension is configured to be coupled to the lock mechanism by a fastening mechanism.
A shaft assembly for a gearbox, the shaft assembly comprising:
- a shaft having a first end and a second end, the second end including at least one recess formed on an end face;
- a lock mechanism removably coupled to the second end of the shaft, the lock mechanism including a base plate with a first side and a second side, a first projecting portion extending axially from the first side and configured to engage with the at least one recess on the shaft, and a second projecting portion extending axially from the second side;
- and
- a retaining extension including an aperture configured to receive the second projecting portion of the lock mechanism through the aperture;
- wherein the retaining extension is configured to be coupled to the lock mechanism by a fastening mechanism.
Dependencies are inferred from the claim text.