The ornamental design for a workvehiclecabin, as shown and described.
FIG. 1 is a top, front, right perspective view of a work vehicle cabin showing our new design with exemplary work vehicle environment;
FIG. 2 is a top, front, right perspective view thereof;
FIG. 3 is a front end view thereof;
FIG. 4 is a rear end view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a left side elevational view thereof; and,
FIG. 7 is a top plan view thereof.
The broken line representations in the figures, including the broken line work vehicle environment shown in FIGS. 1 and 7, show unclaimed environment or boundaries, and thus form no part of the claimed design.