| 摘要 |
PROBLEM TO BE SOLVED: To improve the durability of a thrust washer by arranging a thrust bearing plate so that one side face of its large-diameter outer peripheral section is kept in contact with a planetary gear and the other side face is kept in contact with a carrier, generating the relative rotation between the thrust bearing plate and the carrier, and providing a lubricating groove at a relative rotation section. SOLUTION: The small-diameter outer peripheral section of a thrust bearing plate 17 is pressed into the inner periphery of a planetary gear 4, and they are integrally rotated to prevent an oil leak. The thrust bearing plate 17 is arranged so that one side face of its large-diameter outer peripheral section is kept in contact with the planetary gear 4 and the other side face is kept in contact with a carrier 1, relative rotation is generated between the thrust bearing plate 17 and the carrier 1, and a lubricating groove 20 is provided at a relative rotation section to feed a lubricant. No lubricant is wastefully fed to an unsliding portion, lubrication can be surely applied without waste, and the durability of a thrust washer can be improved. |
