Balance automatic regulating device of beam-pumping unit

The utility model discloses a balance automatic regulating device of a beam-pumping unit, which is designed for solving the balance problem of the beam-pumping unit, namely, a balance weight connecting both an alternate current servo motor and a detection control cabinet is arranged on a beam arm of the beam-pumping unit, and according to judgment by a motor sensor based on the electric power and the power indicating diagram of up/down stroke of the pumping unit, the balance weight is driven to move, so that ideal match of the force arm and force torque of the pumping unit can be realized. The balance automatic regulating device can realize one time balance adjustment, the regulating time is short, the balance accuracy is high, the energy saving effect is remarkable, the labor intensity of the worker can be reduced, the working efficiency is improved, the modification on the previous unit is little, the mounting and dismounting are convenient, the structure is simple, and the cost is low.