Lubrication structure for driving force transmission device

摘要

A planetary gear has a sun gear having external teeth on an outer peripheral side, a plurality of pinion gears engaged with the sun gear, a carrier supporting the plurality of pinion gears, a circular oil catch plate on an end of the carrier, and a rotation member having a ring gear, on an outer peripheral side of the carrier and the oil catch plate. An engaging element engaged with the rotation member is disposed on an outer periphery of the planetary gear. The oil catch plate includes an open close valve which opens a passage at at least a predetermined rotation number. Lubrication oil supplied to the planetary gear is guided to the engaging element through the passage when the open/close valve is opened. This enables adjusting of the lubrication amount in accordance with a variation occurring in a ratio of a lubrication amount to each part.

主权项

1. A lubrication structure for a driving force transmission device, comprising:
a planetary gear having a plurality of rotation elements disposed in a predetermined relation around a rotation shaft; an engaging element disposed on an outer peripheral side of the planetary gear; and a lubrication oil guiding member for guiding lubrication oil attached on the planetary gear, wherein the lubrication oil guiding member comprises:
a first oil passage for guiding lubrication oil supplied from a side of the rotation shaft to an inner part of the planetary gear;a second oil passage for guiding lubrication oil supplied from a side of the rotation shaft to the engaging element;a third oil passage for guiding some of lubrication oil which circulates through the first oil passage to the engaging element; andan open/close means for opening and closing the third oil passage, wherein the open/close means opens the third oil passage when a rotation number of the lubrication oil guiding member is equal to or more than a predetermined rotation number.