Balance block adjuster of walking beam type oil pumping machine

The utility model discloses a balance block adjuster of a walking beam type oil pumping machine. The balance block adjuster comprises a lever handle (1), a hinge (2), a main body (3), a lower stop lever (4), sliding blocks (5), an upper stop lever (6), a spring (7), an adjusting nut (8) and a baffle (9), wherein the lower end of the hook-headed lever handle (1) is hinged with the upper right end of the main body (3) through the hinge (2); the lower stop lever (4) is arranged at the lower right end of the rectangular main body (3) provided with a slide way (A); the upper stop lever (6) is arranged at the upper left end of the main body (3); the sliding blocks (5) are arranged on the two sides of each sliding block (5); the baffle (9) is arranged at the left end of the slide way (A); the spring (7) is sleeved on a central shaft (901) of the baffle (9); and the central shaft (901) provided with an outer thread penetrates through the left end of the main body (3) to be fixed by the adjusting nut (8). The balance