Pinion lubrication structure of planetary gear mechanism
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United States of America Patent
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Dec 16, 2014
Issued Date -
N/A
app pub date -
Mar 20, 2014
filing date -
Mar 21, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A pinion lubrication structure of a planetary gear mechanism includes a hollow portion, an annular oil catcher, an oil gallery, and an aperture. The annular oil catcher is supported by a carrier to collect oil to flow into the hollow portion. The oil is supplied outward in a radial direction from a central portion of the planetary gear mechanism. The oil is supplied to an inner peripheral surface of a pinion through the oil gallery. The oil gallery extends from an inside of the hollow portion through a pinion shaft in the radial direction. The aperture is provided at an axial end of the pinion shaft to be connected to the hollow portion. A distance from an axis to an outer end of the aperture in the radial direction is smaller than a distance from the axis to an outer end of the hollow portion in the radial direction.
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