Robot cleaner

A robot cleaner comprising:

• a main body that forms an exterior appearance of the robot cleaner;
• a wheel cover detachably provided to the main body;
• a drive module movably coupled to the wheel cover;
• and
• a wheel coupled to the drive module and rotated by receiving driving force from the drive module;
• wherein the wheel includes:
• a wheel body coupled to the drive module and forming an exterior appearance of the wheel;
• tread portions spaced apart from each other along a circumferential surface of the wheel body;
• cutout portions formed between the tread portions at the circumferential surface of the wheel body;
• and
• a rib member including a ring portion accommodated in the wheel body and rib portions protruding outward through the cutout portions from the ring portion in a radial direction of the wheel,
• wherein the ring portion is formed of a ring-shaped elastic material and is positioned radially inwardly of the wheel body,
• wherein the rib portions extend from the ring portion through the wheel body to be positioned at the cutout portions, and
• wherein, when force is applied radially to the rib portions, the ring portion is elastically deformed, and the rib portions are drawn into the wheel body.