GEAR TRAIN Russian patent published in 1998 - IPC

FIELD: mechanical engineering. SUBSTANCE: gear train includes two helical gear wheels with parallel shafts. Tooth profile in end section of one of gear wheels is made over the envelope of family of curves describing the profile of end section of tooth of second gear wheel in different positions at relative rotation of wheels. Spiral angles are of the same direction and are related by the following relationship: $$$, where $$$ and $$$ are spiral angles of first and second gear wheels at diameters $$$ and $$$, respectively; U is gear ratio and $$$ and $$$ are diameters of circles on which contact points of first and second wheels lie. Proposed gear train has positive gear ratio; linear contact is effected over tooth flanks. EFFECT: enhanced efficiency. 2 dwg