The ornamental design for a traileraxlejackstand, as shown and described.
FIG. 1 is a front perspective view of a trailer axle jack stand of the claimed design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is left side view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The broken lines in the drawings are included for the purpose of illustrating portions of the trailer axle jack stand and form no part of the claimed design.