Patent ID: 7377870
Filing Date: 2008-05-27
Classification: F16H

Abstract:
1. A planetary gear lubrication unit, comprising a planetary gear unit having a sun gear and a carrier that has a plurality of pinion shafts, wherein each of the plurality of pinion shafts rotatably supports a pinion; a plurality of side plates that support the plurality of pinion shafts; and a rotating shaft arranged in a center portion of the planetary gear unit, in which lubrication oil supplied from the rotating shaft is led to a portion of the pinion shafts that support the pinions, wherein: a first side plate of the plurality of side plates that supports the pinion shafts has an annular groove in an inner peripheral surface and a communication hole that extends in a radial direction from a bottom portion of the annular groove and is connected to an oil hole of each pinion shaft; a thrust bearing is interposed between a flange integrally connected with the first side plate, and the sun gear; the thrust bearing includes a race that has a rising portion that extends in the radial direction on a sun gear side; and the planetary gear lubrication unit is structured such that lubrication oil from the rotating shaft is led between the rising portion of the race and the flange to the annular groove, and then led, via the communication hole, to the oil hole of each pinion shaft.