Pumping unit

The utility model discloses a pumping unit. A swing arm is arranged at the top of a main bracket through a rotating shaft, a chute is arranged at the upper part of the swing arm, a fixed retaining rack is arranged at the tail of the swing arm, a fixed rubber block is arranged at the front end of the fixed retaining rack, and the bottom of the fixed rubber block is arranged on the swing arm; a movable retaining rack is arranged on the swing arm, a movable rubber block is arranged at the rear end of the movable retaining rack, and the fixed rubber block is opposite to the movable rubber block; idle wheels are arranged at the bottom of a movable balancing weight, and the idler wheels are in rolling connection with the chute; a fixing nut is arranged at the front end of the swing arm, and an adjusting screw rod is arranged on the movable retaining rack after being in thread connection with the nut; the movable retaining rack and the movable rubber block are in sliding connection with the swing arm through the adjusting screw rod. The pumping unit is capable of realizing energy-saving oil smoke extraction; the working efficiency of a horse head is increased through the movable balancing weight so as to realize energy saving; the pumping unit is reasonable in structure design, high in practicability and suitable for being popularized in the petroleum machinery field.