LUBRICATING MECHANISM FOR PLANETARY GEAR TRAIN

The present invention provides a lubricating mechanism for a planetary gear train. The planetary gear train comprises a planetary gear, a sliding bearing, a planetary gear shaft and a thrust bearing; an axial channel and a radial channel are formed in the thrust bearing at at least one lubricating position in the circumferential direction of the thrust bearing; a groove is provided in the end surface of the thrust bearing facing the planetary gear; a sealing member is provided in the groove; the axial channel is closer to the sliding bearing than the groove in the radial direction; the sealing member is used for preventing lubricating oil from being discharged from a gap. Due to the existence of the radial channel and the axial channel, the path of the lubricating oil becomes zigzag, an appropriate oil pressure is more easily established at the gap, and thus, the lubricating oil is prevented from being quickly discharged from the gap, so that enough lubricating oil is always provided at the sliding bearing, t