SPUR GEAR TRAIN Russian patent published in 2002 - IPC

FIELD: mechanical engineering; designing of heavily-loaded spur gear trains of high precision. SUBSTANCE: spur gear train includes drive and driven gear wheels. Profiles of tooth points are outlined by convex curves and profile of their dedendum parts are outlined by concave curves. Profile of tooth dedendum parts is made in form of easement curve forming smooth profile of adjacent surfaces of tooth point and dedendum part at point of connection of two curves at curvature radius of involute part equal to curvature radius of easement curve of tooth dedendum part. EFFECT: avoidance of stress concentration in dangerous dedendum part of tooth. 2dwg