MULTIPLE-STAGE REDUCTION GEAR Russian patent published in 1999 - IPC

FIELD: mechanical engineering; drives of well sucker-rod pumps. SUBSTANCE: at least one cylindrical gear-ring of multiple-stage reduction gear is made in form of meshing helical gear and gear wheel. Device for taking up axial forces of helical gear wheels is installed stationary of shaft at end face of gear. Axial force taking up device is made in form of one ring-shaped axial stop. Equal thickness separating flat ring installed on gear rim of gear is used to provide engagement of end face of axial stop with end face of wheel. End faces of axial stop and wheel are made flat. EFFECT: simplified design, enhanced manufacturability of reduction gear, reduced labour input and cost of manufacture. 1 dwg