| 摘要 |
A drive axle assembly including a housing structure having a fixed spindle, a nonrotatable spacer ring disposed about the spindle and a drive hub rotatably mounted on the spindle by bearings, one of which abuts the spacer ring. The spacer ring has a brake apply fluid inlet to an interior passage which opens to a first sealed annular cavity between the spacer ring and the hub. The exterior of the spacer ring defines in conjunction with the drive hub a second low pressure cavity therebetween enclosed by a radial face seal having a rotating portion disposed in the hub and a nonrotating portion disposed in the spacer ring. Lubricating and cooling fluid is pumped through the second cavity to cool the face seal and continues through passages in the drive hub to provide a nearly continuous flow to the drive and brake components in the hub assembly. The specific location of the brake apply cavity interiorly adjacent the lower pressure lubricating cavity also minimizes the effect of small leakages past the seals of high pressure in the brake apply cavity. |
