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US 12,674,507 B2Granted
Gear control system for vibration attenuation
AssigneeParker-Hannifin Corporation
InventorsJohn W. Burrell, John Loeffler, Brian L. Rang
Life of this patent
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Abstract
A power take off unit includes an input gear, an output gear, and an intermediary gear that cooperate to transfer power from a rotational power source to an operating target. The power take off unit has a control module that biases the intermediary gear relative to the input gear and the output gear to reduce gear rattle vibrations associated with intermeshed tooth looseness.
Claims4
A power take off unit that is adapted to be rotationally driven by a primary drive component and to rotationally drive an auxiliary device, the power take off unit comprising:
- a housing that is configured to be attached to a primary drive component;
- a first gear that is supported on the housing and includes a portion that extends from the housing and is adapted to be rotationally driven about a first rotational centerline by the primary drive component;
- a second gear that is supported on the housing so as to be rotationally driven about a second rotational centerline by the first gear, the second gear adapted to rotationally drive an auxiliary device;
- and
- a biasing mechanism that is responsive to an operating condition of the power take off unit to exert a biasing force that urges one of the first and the second rotational centerlines to move relative to the other of the first and second rotational centerlines such that a positional relationship between the first gear and the second gear is changed to attenuate gear rattle when the power take off unit is operated in a generally unloaded or lightly loaded operating condition.
2 more elements
Dependencies are inferred from the claim text.