Differential gearing for vehicle
An internal gear 4 is fitted within a housing 2, and a sun gear 6 is disposed inside the internal gear in concentric relationship therewith. A plurality of planet gears 8 are carried by a planetary carrier 10 connected to the housing 2 and are in meshing engagement with the internal gear 4 and the sun gear 6. Washers 16, 18, 20, 22 and 24 are disposed in regions where the members 2, 4, 6, 8 and 10 slide against respectively. Hollow shafts are connected to a coupling 14 which is connected to the inner periphery of the internal gear 4 and to the inner periphery of the sun gear 6, and a drive from an engine which is input to the housing 2 is delivered through the both shafts. A lubricant oil is introduced through the shaft to lubricate sliding parts which are disposed radially outward of the shaft. A perfect lubrication of the interior of the differential gearing is achieved, seizure resistance can be improved and the occurrence of noises can be reduced.
1 . A differential gearing for vehicle including a housing and rotating members such as an internal gear, a sun gear, a plurality of planet gears and a planetary carrier which carries the planet gears which constitute together a planetary gear mechanism received within the housing; comprising
a shaft disposed in a region of the axis of the planetary gear mechanism and connected to a selected one of the rotating members, a lubricant oil being introduced into the housing through the shaft to lubricate sliding parts of the rotating members which are disposed radially outward of the shaft.
2 . A differential gearing for vehicle according to claim 1 in which the wall surface of the housing is not formed with an oil hole which extends through the wall surface in a region in which the planetary gear mechanism is received.
3 . A differential gearing for vehicle according to claim 1 in which the shaft is hollow, and the lubricant oil is introduced into the housing through the inside of the shaft.
4 . A differential gearing for vehicle according to claim 1 in which the lubricant oil which is introduced into the housing is externally displaced at a location which is disposed radially inward of sliding parts of the rotating members.
5 . A differential gearing for vehicle according to claim 4 in which the lubricant oil is externally displaced from within the housing through the outer peripheral surface of the shaft.