Axle assembly
An axle assembly with a carrier housing, an input pinion and a ring gear. The input pinion includes pinion gear teeth and is supported for rotation about a first axis relative to the carrier housing via first and second bearings. The ring gear includes ring gear teeth that are meshed to the pinion gear teeth and a third bearing supports the ring gear for rotation about the second axis relative to the carrier housing. The third bearing is disposed along the second axis on a side of the ring gear that is opposite the first axis.
1. An axle assembly comprising:
a housing;
an input pinion having a pinion gear and a pinion shaft, the input pinion being received in the housing and being rotatable about a first axis;
a ring gear meshed with the pinion gear and rotatable about a second axis that is transverse to the first axis;
a differential assembly having a differential input and a pair of output members, the differential input being driven by the ring gear; and
a first bearing and a second bearing for supporting the input pinon for rotation relative to the housing about the first axis, the first bearing being a four-point angular contact bearing having a first outer bearing race, a first inner bearing race and a single row of bearing elements that are disposed between the first outer bearing race and the first inner bearing race.
2. The axle assembly of claim 1 , wherein the pinion gear is disposed along the first axis between the first bearing and the second bearing.
3. The axle assembly of claim 1 , wherein the differential assembly comprises a differential gearset that is received in the differential input.
4. The axle assembly of claim 3 , wherein the differential gearset comprises a pair of side gears and a plurality of differential pinions, each of the side gears being rotatably coupled to an associated one of the output members, each of the differential pinions being meshingly engaged to the pair of side gears.
5. The axle assembly of claim 3 , wherein the differential input is a differential case.
6. The axle assembly of claim 1 , wherein the first inner bearing race comprises a race groove that is formed in the input pinion.
7. The axle assembly of claim 1 , wherein the second bearing is a roller bearing.
8. The axle assembly of claim 1 , wherein the first outer bearing race comprises a first outer race member and a second outer race member that are axially separated from one another.
9. The axle assembly of claim 1 , further comprising a pinion shaft seal that is mounted to the housing, the pinion shaft seal having at least one lip seal that is sealingly engaged to the pinion shaft.
10. The axle assembly of claim 1 , further comprising a yoke flange non-rotatably coupled to the input pinion.
11. The axle assembly of claim 10 , wherein the input pinion defines an internal cavity into which the yoke flange is received.
12. The axle assembly of claim 11 , wherein the input pinion has a first coupling portion having a plurality of internal spline teeth that border the internal cavity, and wherein the yoke flange includes a second coupling portion that is received into the internal cavity, the second coupling portion having a plurality of external spline teeth that matingly engage the internal spline teeth.
13. The axle assembly of claim 11 , wherein the input pinion defines a threaded aperture that intersects the internal cavity.
14. The axle assembly of claim 1 , further comprising a ring gear bearing disposed between the housing and the ring gear.
15. The axle assembly of claim 14 , wherein the ring gear bearing comprises a four-point angular contact bearing.
16. The axle assembly of claim 15 , wherein the ring gear bearing comprises a second inner bearing race, a second outer bearing race and a plurality of second bearing elements that are received between the second inner bearing race and the second outer bearing race, and wherein the second inner bearing race comprises a bearing groove that is formed into the ring gear.
17. The axle assembly of claim 16 , further comprising a ring gear bearing disposed between the housing and the ring gear.
18. The axle assembly of claim 17 , wherein the ring gear bearing comprises a four-point angular contact bearing.
19. The axle assembly of claim 18 , wherein the ring gear bearing comprises a second inner bearing race, a second outer bearing race and a plurality of second bearing elements that are received between the second inner bearing race and the second outer bearing race, and wherein the second inner bearing race comprises a bearing groove that is formed into the ring gear.
20. An axle assembly comprising:
a housing;
an input pinion having a pinion gear and a pinion shaft, the input pinion being received in the housing and being rotatable about a first axis;
a ring gear meshed with the pinion gear and rotatable about a second axis that is transverse to the first axis;
a differential assembly having a differential input and a pair of output members, the differential input being driven by the ring gear; and
a first bearing and a second bearing for supporting the input pinon for rotation relative to the housing about the first axis;
wherein rotation of the input pinion in a first rotational direction to drive the ring gear generates a first thrust force that is transmitted between the input pinion and the housing in a first direction along the first axis, wherein rotation of the input pinion in a second rotational direction opposite the first rotational direction to drive the ring gear generates a second thrust force that is transmitted between the input pinion and the housing in a second direction along the first axis, and wherein at least a substantial majority of each of the first and second thrust forces is transmitted through the first bearing.
21. The axle assembly of claim 20 , wherein the pinion gear is disposed along the first axis between the first bearing and the second bearing.
22. The axle assembly of claim 20 , wherein the differential assembly comprises a differential gearset that is received in the differential input.
23. The axle assembly of claim 22 , wherein the differential gearset comprises a pair of side gears and a plurality of differential pinions, each of the side gears being rotatably coupled to an associated one of the output members, each of the differential pinions being meshingly engaged to the pair of side gears.
24. The axle assembly of claim 22 , wherein the differential input is a differential case.
25. The axle assembly of claim 20 , wherein the first inner bearing race comprises a race groove that is formed in the input pinion.
26. The axle assembly of claim 20 , wherein the second bearing is a roller bearing.
27. The axle assembly of claim 20 , wherein the first outer bearing race comprises a first outer race member and a second outer race member that are axially separated from one another.
28. The axle assembly of claim 20 , further comprising a pinion shaft seal that is mounted to the housing, the pinion shaft seal having at least one lip seal that is sealingly engaged to the pinion shaft.
29. The axle assembly of claim 20 , further comprising a yoke flange non-rotatably coupled to the input pinion.
30. The axle assembly of claim 29 , wherein the input pinion defines an internal cavity into which the yoke flange is received.
31. The axle assembly of claim 30 , wherein the input pinion has a first coupling portion having a plurality of internal spline teeth that border the internal cavity, and wherein the yoke flange includes a second coupling portion that is received into the internal cavity, the second coupling portion having a plurality of external spline teeth that matingly engage the internal spline teeth.
32. The axle assembly of claim 30 , wherein the input pinion defines a threaded aperture that intersects the internal cavity.