The ornamental design for a cleaningrobot, as shown and described.
1. Cleaning robot
2. Cleaning robot
3. Cleaning robot
4. Cleaning robot
1.1: Front
1.2: Back
1.3: Left
1.4: Right
1.5: Top
1.6: Bottom
1.7: Perspective
2.1: Front
2.2: Back
2.3: Left
2.4: Right
2.5: Top
2.6: Bottom
2.7: Perspective
3.1: Front
3.2: Back
3.3: Left
3.4: Right
3.5: Top
3.6: Bottom
3.7: Perspective
4.1: Front
4.2: Back
4.3: Left
4.4: Right
4.5: Top
4.6: Bottom
4.7: Perspective
Figs. 1.1-1.7are drawings showing a first embodiment of the cleaning robot; figs. 2.1-2.7are drawings showing a second embodiment of the cleaning robot; figs. 3.1-3.7are drawings showing a third embodiment of the cleaning robot; and figs. 4.1-4.7are drawings showing a fourth embodiment of the cleaning robot; the present product is used for cleaning the floor/ground. The portions of the cleaning robot each shown with gray color overlay and located between two broken-line boundaries form no part of the claimed design.