DIFFERENTIAL CRANK MECHANISM FOR OIL-WELL SUCKER-ROD PUMP Russian patent published in 2005 - IPC

FIELD: mechanical engineering.

SUBSTANCE: mechanism comprises cylindrical reduction gear (1) kinematically connected with central (3) and driving (8) cranks, bearing for mounting connecting rod (10), and balancing weights (11) and (12). Central crank (3) is mounted on output shaft (2) of the reduction gear and has planet gearing mounted in the housing. Central wheel (4) of the planet gear is secured to axle (5) passing through hollow shaft (2) of reduction gear (1) and engages satellite (7) through idle pinion (6). Driving crank (8) is mounted on the output end of satellite (7) and has bearing for mounting connecting rod (10). The number of teeth of central wheel (4) is twice as much as the number of teeth of satellite (7). The radii of cranks (3) and (8) point in the same direction and are the extensions of each other when the cranks are in the vertical plane.

EFFECT: prolonged service life.

2 dwg