Drawing device suitable for dismounting large belt pulley of oil pumping unit

The utility model relates to the technical field of oil pumping units, and discloses a drawing device suitable for dismounting a large belt pulley of an oil pumping unit, which comprises a base, the upper part of the base is fixedly connected with an adjusting assembly, and one side of the adjusting assembly is fixedly connected with a dismounting assembly; the dismounting assembly comprises a supporting plate, two half gears are rotationally connected to the bottom of the supporting plate, a second motor is fixedly connected to the upper portion of the supporting plate, one half gear is fixedly connected to the output end of the second motor, and the two half gears are meshed with each other. According to the device, under the mutual cooperation of structures such as a second motor, a half gear, a connecting rod, a shifting rod, a rotating rod, a rod sleeve and a fixed rod, a belt can be opened, so that the belt can be conveniently detached from a belt pulley, and then the belt pulley can be conveniently det