A PUMPING UNIT WITH A CURVED AND FOLDED WALKING BEAM

摘要

The invention discloses a pumping unit with a curved and folded beam, comprising a base (1), a motor (2), a transmission mechanism (4), a crank-link assembly (5), a balance weight for the crank (10), a frame (9), a cable hanger assembly (11), a horse head (12), a bearing assembly for the frame (14), a walking beam assembly (13) and a bearing assembly (8) on the trail end of the walling beam. The trail end of the walking beam is curved and folded downward for a distance. The bearing assembly (13) on the trail end of the walling beam is provided on the upper surface of the trail end of the walking beam (13) and the balance weight (6) for the walking beam (13) on the lower surface of the trail end of the walking beam. Since the balance weight (6) is lowered for a distance, the output torque of the crank and therefore the power consumption is reduced during operation.