Online power taking device of power transmission line robot

The invention discloses an online power taking device of a power transmission line robot. The device comprises: a bearing assembly, wherein the bearing assembly comprises a shell, a lifting plate, a guide column, a first motor and a screw rod, the guide column, the first motor and the screw rod are arranged at the bottom of the inner side of the shell, the guide column is sleeved with the liftingplate, the lifting plate is in threaded connection with the screw rod, and the first motor is connected with the screw rod; a pulley assembly which comprises an upper roller, a lower roller and a second motor, wherein the upper roller is suspended at the top of the shell, the second motor is connected with the upper roller, and the lower roller is arranged on the lifting plate; and a power takingassembly which is arranged on the lifting plate. According to the device, when the pulley assembly is assembled on the cable, the power taking assembly wraps the periphery of the cable, enters a working state and continuously