Rear guard assembly

1. A guard assembly, comprising:

a support assembly comprising a plurality of arms;

a plurality of braces, wherein each brace is supported by one of the arms of the support assembly, and wherein each brace comprises:

a collapsible stiffener comprising a pair of symmetrical folds; and

a spacer positioned intermediate the pair of symmetrical folds; and

a rearward-facing guard plate mounted to the plurality of braces.

2. The guard assembly of claim 1 , wherein each brace further comprises a support plate comprising a pair of angled supports, wherein the collapsible stiffener is positioned intermediate the angled supports.

3. The guard assembly of claim 1 , wherein the plurality of arms comprises a pivot arm coupled to each brace, and wherein the pivot arms comprise I-beams.

4. The guard assembly of claim 3 , wherein the plurality of arms further comprises a pair of fixed arms, and wherein each fixed arm comprises:

a pair of stiffening plates; and

a support gusset.

5. The guard assembly of claim 3 , wherein a longitudinal axis is aligned with the pivot arm coupled to each brace, and wherein each brace is symmetrical relative to the longitudinal axis.

6. The guard assembly of claim 5 , wherein the symmetrical folds are configured to deflect laterally with respect to the longitudinal axis.

7. A guard assembly, comprising:

a guard plate;

a plurality of braces mounted to the guard plate, wherein each brace comprises a collapsible shock absorber comprising:

a first end;

a second end, wherein a longitudinal axis is aligned with the first end and the second end; and

a plurality of outwardly-protruding portions between the first end and the second end, wherein a lateral axis traverses the outwardly-protruding portions and is oriented perpendicular to the longitudinal axis, and wherein the outwardly-protruding portions are symmetrical relative to the lateral axis.

8. The guard assembly of claim 7 , wherein the collapsible shock absorber is symmetrical relative to the longitudinal axis.

9. The guard assembly of claim 7 , wherein the collapsible shock absorber comprises a hexagonal geometry, and wherein each outwardly-protruding portion forms a pair of sides of the hexagonal geometry.

10. The guard assembly of claim 7 , wherein the outwardly-protruding portions are configured to deflect outward along the lateral axis when the second end moves toward the first end along the longitudinal axis.

11. The guard assembly of claim 7 , further comprising a spacer positioned between the first end and the second end.

12. The guard assembly of claim 7 , wherein each brace further comprises an outside member, and wherein one of the collapsible shock absorbers is positioned between the guard plate and the outside member of each brace.

13. The guard assembly of claim 12 , wherein each outside member comprises:

a first end portion mounted to the guard plate;

a second end portion mounted to the guard plate; and

an intermediate portion mounted to the collapsible shock absorber.

14. The guard assembly of claim 13 , wherein the first end of each collapsible shock absorber is fastened to the intermediate portion of the outside member of the same brace.

15. The guard assembly of claim 13 , wherein the outside member is symmetrical relative to the longitudinal axis.

16. The guard assembly of claim 12 , wherein each outside member and each collapsible shock absorber are welded to the guard plate.

17. The guard assembly of claim 8 , further comprising a support assembly comprising a plurality of pivot arms.

18. The guard assembly of claim 17 , wherein the plurality of pivot arms comprises a pivot arm coupled to each brace, and wherein the pivot arms comprise I-beams.

19. The guard assembly of claim 17 , wherein the support assembly further comprises a pair of fixed arms, and wherein each fixed arm comprises:

a pair of stiffening plates; and

a support gusset.