Robot and transmission mechanism thereof

The invention discloses a robot and a transmission mechanism thereof. The transmission mechanism comprises two transmission parts which can rotate around the axes of the transmission parts, each transmission part comprises a belt wheel section and an eccentric shaft section eccentrically arranged relative to the belt wheel section, the eccentric shaft sections are connected with the belt wheel sections, and the two transmission parts are arranged at intervals; the synchronous part is connected to the two belt wheel sections; the connecting rod is rotationally connected to the two eccentric shaft sections; when one of the two transmission parts rotates, the two belt wheel sections are in transmission through the synchronous part, the two eccentric shaft sections are in transmission through the connecting rod, and then the other transmission part is driven to rotate. By means of the mode, the transmission mechanism provided by the invention can transmit larger torque, the rigidity is higher, and the transmission precision is also improved.