Bearing and upper-and-lower-shackle torque transmission structure for top drive drilling machine

The bearing and upper shackle torque transmission structure comprises a drill rod clamping device, a reaction torque arm, a reaction torque frame and a connecting sleeve which are sequentially connected from bottom to top, a plurality of upper key grooves are formed in the bottom of the connecting sleeve, lower key grooves are formed in the top of a fixing shaft, and torque transmission keys are installed in the upper key grooves and the lower key grooves. A groove is formed in the bottom of a lower flange of the fixing shaft, a fixing block is arranged at the top end of the reaction torque frame, and the fixing block is assembled in the groove to connect the reaction torque frame to the bottom of the fixing shaft. And the reaction torque frame is connected with the drill rod clamping device through a reaction torque arm. The outer portions of the connecting sleeve and the fixed shaft are connected in a sealed mode through the half joint, traditional threaded connection is replaced, all loads of a drill colum