The ornamental design for a babycarriageframe, as shown and described.
FIG. 1 is a left side elevation view of a baby carriage frame showing our new design in a stroller configuration, the right side elevation view being a mirror image thereof;
FIG. 2 is a left, rear, top perspective thereof;
FIG. 3 is a left, front, top perspective view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a front elevation view thereof; and,
FIG. 6 is a left side elevation view of the baby carriage frame of FIG. 1 in a fully folded configuration.