초록 ▼

An axle outer end is disclosed including a planetary reduction drive unit and a multiple disc friction brake. The friction brake includes a plurality of rotatable and non-rotatable discs for selectively interconnecting the ring and sun gears of the planetary drive unit. The friction brake also inclu

An axle outer end is disclosed including a planetary reduction drive unit and a multiple disc friction brake. The friction brake includes a plurality of rotatable and non-rotatable discs for selectively interconnecting the ring and sun gears of the planetary drive unit. The friction brake also includes a piston for engaging and moving the discs into frictional contact with the planetary drive unit carrier to restrain rotation of the sun gear and output member. The piston is contained in a chamber formed by a portion of the planetary drive unit ring gear and a portion of an adapter secured to the outer end of a non-rotatable spindle. An improved oil circulation system is incorporated in the axle outer end to supply oil to the disc stack and permit the oil to return the main oil sump.

대표청구항 ▼

In an axle outer end assembly comprising a stationary axle housing a non-rotatable spindle connected to said axle housing having a central opening an input member projecting from said spindle central opening, an output member surrounding said input member having an inner end rotatably mounted on sai

In an axle outer end assembly comprising a stationary axle housing a non-rotatable spindle connected to said axle housing having a central opening an input member projecting from said spindle central opening, an output member surrounding said input member having an inner end rotatably mounted on said spindle and an open outer end and a sump containing a supply of oil, a planetary drive unit operably connecting said input and output members, said planetary drive unit including a ring gear fixed to said spindle having longitudinally extending internal gear teeth, a sun gear non-rotatably mounted on said input member having longitudinally extending external gear teeth, a plurality of pinion gears having external teeth in meshing engagement with a first portion of said internal and external teeth at one end of said ring and sun gear and a carrier secured to the output member open end rotatably supporting said plurality of pinion gears, a disc brake operably connecting said ring and sun gears comprising a first plurality of axially movable stationary discs having external teeth engaging a second portion of said internal teeth at the other end of said ring gear, a second plurality of axially movable rotatable discs interleaved between said first discs having internal teeth engaging said external teeth at the other end of said sun gear and a piston operative in a first position to move said discs into frictional contact with one another and into engagement with said carrier whereby said sun gear and output member are restrained against rotation, and operative in a second position to allow said discs to move out of frictional contact with one another whereby said sun gear and output member are rotatable relative to each other, an improvement comprising: an oil circulation system for supplying oil to said stationary and rotatable brake discs, said oil circulation system comprising means between said sun gear and rotatable discs defining an axial oil flow path for receiving oil from between said sun and pinion gear teeth, means on said ring gear for receiving oil from said stationary and rotatable discs and directing said oil to said sump.