The ornamental design for a wheelchaircover, as shown and described.
FIG. 1 is a front perspective of a transport wheelchair cover showing my new design, in the context of a transport wheelchair, showing my new design in use;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is bottom view thereof; and,
FIG. 9 is a perspective view thereof, showing an alternate position for the right leg cover, and the left cover may have a mirror position.
The broken line showing of the wheelchair and the pad are included for the purpose of illustrating environment and form no part of the claimed design.