Steering knuckle assembly having a kingpin

1. A steering knuckle assembly comprising:

a steering knuckle having a first hole and a second hole;

first and second bearing assemblies disposed in the first and second holes, respectively; and

a kingpin having first and second end surfaces that are disposed opposite each other;

wherein the first and second end surfaces are received in and engage the first and second bearing assemblies such that first and second bearing assemblies exert a compression force against the first and second end surfaces, respectively.

2. The steering knuckle assembly of claim 1 wherein an axle beam is fixedly disposed on the kingpin.

3. The steering knuckle assembly of claim 1 wherein the compression force reduces steering wheel shimmy.

4. The steering knuckle assembly of claim 1 wherein the steering knuckle further comprises a snap ring groove disposed in the first hole and wherein a snap ring is disposed in the snap ring groove and compresses the first bearing assembly toward the second bearing assembly.

5. The steering knuckle assembly of claim 1 wherein the first bearing assembly includes a cup that defines a cavity, wherein the first end surface is disposed in the cavity.

6. The steering knuckle assembly of claim 5 wherein the cavity is configured as a blind hole and wherein a washer is disposed between the first end surface and the cup.

7. The steering knuckle assembly of claim 6 wherein the first bearing assembly further comprises a seal assembly disposed proximate an opening of the cavity and a set of roller bearings that extend from the washer to the seal assembly.

8. The steering knuckle assembly of claim 7 wherein the seal assembly includes a seal mounting ring that is disposed adjacent to members of the set of roller bearings, wherein the seal mounting ring and washer cooperate to help align the members of the set of bearings.

9. The steering knuckle assembly of claim 7 further comprising a deflector that is disposed proximate the seal assembly and extends around the kingpin.

10. A steering knuckle assembly comprising:

a steering knuckle having a first hole;

a first bearing assembly disposed in the first hole; and

a kingpin that extends along an axis, the kingpin including:

a first end surface and a second end surface disposed opposite the first end surface, and

a lubricant reservoir that extends along the axis from the first end surface toward the second end surface and that receives a lubricant.

11. The steering knuckle assembly of claim 10 wherein the first bearing assembly includes a cup that at least partially defines a cavity that receives a washer, wherein the washer engages the first end surface.

12. The steering knuckle assembly of claim 11 wherein the washer includes a first ring and a second ring, wherein the first and second rings are concentrically disposed such that a gap is provided between the first and second rings.

13. The steering knuckle assembly of claim 12 wherein the second ring includes a center hole disposed proximate the lubricant reservoir and at least one groove that extends from the center hole to the gap.

14. The steering knuckle assembly of claim 13 wherein the second ring includes a first surface and a second surface disposed opposite the first surface, wherein the at least one groove is provided in the first and second surfaces.

15. The steering knuckle assembly of claim 13 further comprising a set of roller bearings that are disposed in the cavity adjacent to the washer and that engage the kingpin to permit the steering knuckle to rotate about the axis, wherein the groove permits lubricant to flow from the lubricant reservoir to the gap and wherein lubricant flows from the gap to the set of roller bearings.

16. A steering knuckle assembly comprising:

a steering knuckle having a first hole and a second hole;

first and second bearing assemblies disposed in the first and second holes, respectively, wherein the first and second bearing assemblies each have a cup having a cavity that receives a washer, a set of roller bearings, and a seal assembly, wherein the set of roller bearings are disposed between the washer and the seal assembly; and

a kingpin that extends along an axis and through an axle beam, the kingpin having first and second end surfaces that are disposed opposite each other and that are received in the first and second bearing assemblies, respectively;

wherein the washer in the first bearing assembly engages the first end surface and the washer in the second bearing assembly engages the second end surface.

17. The steering knuckle assembly of claim 16 wherein the cup has a first surface, a second surface disposed opposite the first surface, a third surface that extends from the first surface to the second surface, and a fourth surface disposed opposite the third surface that extends from the first surface toward the second surface to at least partially define the cavity.

18. The steering knuckle assembly of claim 17 wherein the cup further comprises a fifth surface disposed at a bottom of the hole, wherein the washer has a first surface that engages the fifth surface and a second surface disposed opposite the first surface that engages the kingpin.

19. The steering knuckle assembly of claim 17 wherein a snap ring engages the second surface.

20. The steering knuckle assembly of claim 17 wherein the first and second bearing assemblies each have a deflector disposed proximate the second and third surfaces of the cup and that engages the seal assembly.