Axle assembly having a steering knuckle

1. An axle assembly comprising:

a steering knuckle that includes:

a spindle that supports a wheel hub assembly; and

a camshaft tube hole; and

a brake spider that is a separate component from the steering knuckle that is directly attached to the steering knuckle, the brake spider having an anchor pin hole that receives an anchor pin that is configured to support a brake pad assembly and does not engage the steering knuckle, wherein the brake spider does not encircle the spindle.

2. The axle assembly of claim 1 further comprising:

a camshaft tube disposed in the camshaft tube hole and spaced apart from the brake spider; and

a camshaft rotatably disposed in the camshaft tube for actuating the brake pad assembly.

3. The axle assembly of claim 2 wherein the camshaft is spaced apart from the brake spider.

4. The axle assembly of claim 2 wherein the camshaft tube extends through the camshaft tube hole and is fixedly positioned with respect to the steering knuckle.

5. The axle assembly of claim 2 wherein the anchor pin hole and the anchor pin are spaced apart from and do not engage the steering knuckle.

6. The axle assembly of claim 5 wherein the spindle is disposed between and is spaced apart from the anchor pin and the camshaft.

7. The axle assembly of claim 1 wherein the steering knuckle has a unitary one-piece construction that includes the spindle.

8. An axle assembly comprising:

a steering knuckle that includes:

a spindle configured to rotatably support a wheel hub assembly; and

a camshaft tube hole that is spaced apart from the spindle;

a camshaft rotatably disposed in the camshaft tube hole for actuating a brake pad assembly; and

a brake spider that has an anchor pin hole that receives an anchor pin that supports the brake pad assembly and does not engage the steering knuckle, wherein the brake spider is a separate component from the steering knuckle that is fixedly attached to and engages the steering knuckle such that the brake spider is not disposed between the spindle and the camshaft tube hole.

9. The axle assembly of claim 8 further comprising a camshaft tube that is disposed in the camshaft tube hole and that receives the camshaft, wherein the camshaft tube and brake spider are disposed on opposite sides of the spindle.

10. The axle assembly of claim 8 wherein the steering knuckle includes an inner ring that extends around the spindle and an outer sector that extends partially around the inner ring, wherein the brake spider is disposed on the outer sector and does not encircle the spindle.

11. The axle assembly of claim 10 wherein a set of mounting holes extend through the outer sector, wherein each member of the set of mounting holes receives a fastener for securing the brake spider to the steering knuckle.

12. The axle assembly of claim 11 wherein the set of mounting holes are not disposed between the spindle and the camshaft tube.

13. The axle assembly of claim 8 wherein the anchor pin extends along an anchor pin axis, wherein the spindle extends along a spindle axis, the camshaft extends along a camshaft axis, and wherein the spindle axis, anchor pin axis, and camshaft axis are coplanar.

14. The axle assembly of claim 8 wherein the spindle extends along a spindle axis and the steering knuckle is divided into four quadrants about the spindle axis, wherein the camshaft tube hole is disposed in a first quadrant and the brake spider is not disposed in the first quadrant.

15. An axle assembly comprising:

a steering knuckle that includes:

a spindle configured to rotatably support a wheel hub assembly; and

a camshaft tube hole that extends through the steering knuckle;

a camshaft tube disposed in the camshaft tube hole;

a camshaft rotatably disposed in the camshaft tube for actuating a brake pad assembly; and

a brake spider that is a separate component from the steering knuckle and is fixedly attached to the steering knuckle, the brake spider having an anchor pin hole that receives an anchor pin that supports the brake pad assembly, wherein the brake spider is spaced apart from and does not engage the spindle, camshaft tube, and the camshaft.

16. The axle assembly of claim 15 wherein the camshaft tube extends through the camshaft tube hole.

17. The axle assembly of claim 16 further comprising a first bushing disposed in the camshaft tube that rotatably supports the camshaft.

18. The axle assembly of claim 17 further comprising a second bushing disposed in the camshaft tube that is spaced apart from the first bushing and that rotatably supports the camshaft.

19. The axle assembly of claim 17 further comprising a seal disposed proximate an end of the camshaft tube between the first bushing and a cam portion of the camshaft.

20. The axle assembly of claim 19 wherein the seal has a distal end that extends away from the cam portion.