Dust collecting device, cleaning base station and robot cleaning system

A dust collecting device, comprising:

• a machine shell, wherein an accommodating cavity is formed in the machine shell, an opening communicated with the accommodating cavity is provided on the machine shell;
• a cover body, wherein the cover body is movably connected with the machine shell for closing the opening, and a pushing component is arranged on the cover body;
• an air duct structure, wherein the air duct structure is provided in the machine shell, a dust outlet of the air duct structure is communicated with the accommodating cavity;
• a rotating support, wherein the rotating support is provided in the accommodating cavity, one end of the rotating support is a rotating fulcrum;
• and
• a dust bag, wherein the dust bag is located in the accommodating cavity and installed on the rotating support,
• wherein when the cover body closes the opening, the pushing component drives the rotating support to rotate around the rotating fulcrum, so that a part of the dust outlet is located in the dust bag to achieve the air duct structure communicating with the dust bag.