INTERNAL INVOLUTE X-GEAR DRIVE Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: gear drive has gear and wheel with equal number of external and internal teeth. Pitch point in such gear drive bexomes infinite, pressure angle is equal to 90 deg., the line of action is parallel to the line of centers and distance between axes is equal to half the backlash measured by normal to involute profile. In machining the teeth of each wheel with standard gear cutting tools it is recommended that tangential addendum modification shaft should be introduced in addition to radial shift which increases depth of engagement and optimizes gearing by the smoothness and/or load carrying capacity criterion. In particular, versions of gearing with gearanteed two two-pair engagement and with minimum overall dimensions for preset distance between axes are provided. EFFECT: enhanced reliability. 5 cl, 5 dwg