The ornamental design for a rollingbrush for floorwashing appliance, as shown and described.
1. Rolling brush for floor washing appliance
1.1: Front
1.2: Back
1.3: Left
1.4: Right
1.5: Top
1.6: Bottom
1.7: Perspective
1.8: Perspective
1.1is a front view showing a rolling brush for floor washing appliance; 1.2is a back view thereof; 1.3is a left view thereof; 1.4is a right view thereof; 1.5is a top view thereof; 1.6is a bottom view thereof; and 1.7and 1.8are two perspective views thereof; the broken lines shown in the reproductions depict portions of the rolling brush for floor washing appliance that form no part of the claimed design.