| 摘要 |
PURPOSE: To improve lubricatability and to prevent the abrasion of a washer by forming an oil lubricating groove, extended from a peripheral side toward an internal peripheral side to open both end parts, in at least one of contact surfaces with a housing and with a washer arranged between the housing and an end face of a sun gear. CONSTITUTION: A differential gear device A is provided with a housing 1, pair of sun gears 2A, 2B, for instance, three pairs of plant gears 3A, 3B, center washer 4A and an end washer 4B. Each pair of the planet gears 3A, 3B is meshed with the sun gears 2A, 2B. Here inside the center washer 4A formed with a through hole 41 in a central part, three oil introducing holes 43 are formed. Each oil introducing hole 43 is provided so as to be positioned in an intermediate part of adjacent two engaging protrusions 42, 42, to enlarge this width gradually in accordance with toward the outside from inside the washer 4A. In this way, lubricating oil in a differential gear case can be sufficiently supplied to a washer internal peripheral side through the oil introducing groove 43. |
