Automatic feeding mechanical arm

The utility model relates to a self-feeding mechanical arm, which comprises a machine base, wherein a servo-motor is equipped on the machine base, the servo-motor is connected with a turning shaft arranged on the machine base through a synchronous belt drive pair, a rotating body which can synchronously rotate with the turning shaft is fixedly arranged above the turning shaft, a ball screw rod pair and a guide bar are vertically and parallel arranged in the rotating body, one end of the ball screw rod pair is connected with the servo-motor which can drive the end rotate through a coupler, at the same time, a clamping arm mechanism for catching and carrying specimen is package equipped on the ball screw rod pair and the guide bar, further, the clamping arm mechanism and the guide bar are slidably package connected, the clamping arm mechanism and the ball screw rod pair screw nut are fitly package connected, the servo-motor for controlling the turning shaft rotation and the servo-motor for controlling the up-and-down motion of the clamping arm mechanism are respectively connected with a control circuit, thereby the utility model has the advantages of few components, simple structure, low costs, and convenient operation.