Mobile robot and crawler-type chassis thereof

The invention discloses a mobile robot and a crawler-type chassis thereof. The mobile robot comprises a crawler-type chassis thereof. The crawler-type chassis comprises a frame, main crawler modules,and suspension mechanisms. The suspension mechanisms are respectively disposed in the main crawler modules on the two sides of the frame, and comprise a plurality of hinge- connection parts of planetgears, which are engaged with each other. The planet gears are respectively sequentially disposed on the hinge connection side plates of the frame, and the axes of the planet gears are disposed on thesame straight line, and the driving wheels are connected with a stepping motor disposed on the frame. Christie suspension parts are respectively connected with the frame and the hinge connection parts, and are disposed under the hinge connection parts, and abut against the inner side of the crawler. Each of the Christie suspension parts are provided with a retracting position and a releasing position with respect to the fr