PUMPING UNIT DRAWN DIRECTLY BY EXTERNAL-ROTOR MOTOR

A pumping unit drawn directly by an external-rotor motor includes a permanent-magnet motor (1) with low speed and high torque, an upper platform (2) and an upper guardrail (32), an assembled ladder stand (7), an elevating system (3) of steel wire rope, a self-positioning elevator (4), upright columns (5) in various forms as supports, an emergency brake and a manual brake system (11), a clamping mechanism (13) for a movable track, a concrete foundation (16) which is easy to transport and install, and the like. The pumping unit has the advantages of compact structure, reliable performance, simple manufacturing process and the like, and greatly improves indexes on efficiency increasing, energy saving, emission and consumption reduction compared with other machine types.