Direct balance energy-saving beam-pumping unit

The invention discloses a direct balance energy-saving beam-pumping unit used in the mechanical oil extraction field. The beam-pumping unit comprises a horse head, a beam, a bracket, a base and a balance system consisting of a frame assembly, a power assembly, a suspension balance weight assembly and a beam balance weight assembly, wherein, the frame assembly is arranged on the base, the power assembly is fixed on the frame assembly, the beam balance weight assembly is fixed on the beam, and the suspension balance weight assembly is driven by the power assembly to be arranged on the frame assembly in a sliding manner and is connected with the tail of the beam by a steel cable. By reconstructing the balance system, the direct balance energy-saving beam-pumping unit solves the problems of hard balance adjustment of the conventional beam pumping units, low system efficiency and high energy consumption, and is used for replacing the traditional crank balance device. The direct balance energy-saving beam-pumping u