BOREHOLE ROD PUMP DRIVE Russian patent published in 2014 - IPC F04B47/02 

FIELD: engines and pumps.

SUBSTANCE: proposed drive comprises motor, reduction gearbox and mechanism converting the rotation into reciprocation, all being mounted at the bed on frame with housing. It comprises drive and driven pulleys wrapped by continuous flexible link engaged with carriage connected with counterweight fitted in the housing guides and coupled via flexible link with suspension of rods. Axles of said converting mechanism, counterweight and flexible link are located nearby one vertical plane. Upper (driven) pulley is fitted in housing to revolve therein and perform limited displacement along converting mechanism axis for adjustment of continuous resilient mechanism with the help of tensioner. Counter-turn-off mechanism is composed by automatic mechanism. Screw of screw pair is equipped with drum provided with wound resilient link. End of said link is connected via tackle with the weight that can spin the drum for tensioning of said continuous resilient link of screw pair at slackening of said continuous resilient link and downward displacement of the carriage with said counterweight.

EFFECT: higher operating reliability.

4 cl, 3 dwg