Braking apparatus of beam-pumping unit

The utility model discloses a braking apparatus of a beam-pumping unit. In order to overcome the disadvantage that safety braking requirements of a special-structure reducer cannot be met by a conventional vertical pull bar braking mechanism, the braking apparatus provided by the utility model comprises an operating mechanism, pull bars, a brake hub and a brake shoe; a reducer is fixedly mounted on a pumping unit pedestal; the brake hub is arranged on an end part of a driving shaft of the reducer; the operating mechanism, a lower horizontal pull bar, a lower rocker arm, a vertical pull bar, an upper rocker arm, an upper horizontal pull bar and the brake shoe are connected in turn; a connecting shaft connecting two arms of the lower rocker arm is mounted on a lower support which is fixedly mounted on the pedestal; a connecting shaft connecting two arms of the upper rocker arm is mounted on an upper support which is fixedly mounted on a pedestal rear vertical plate; and the pedestal is ladder-shaped. The benefi