INTERNAL GEAR STRUCTURE FOR INTERNAL MESHING PLANETARY GEARS

摘要

PROBLEM TO BE SOLVED: To provide planetary reduction gear that reduces a backlash and eliminates increase in pulsation and noise due to an inappropriate meshing. SOLUTION: A planetary structure is so designed that planet gears 210 (210A to 210C) with external teeth are in internal contact with an internal gear 280 with internal teeth (roller pins) 284. A body 282 of the internal gear 280 is coaxially provided with a first and a second ringed slit 290 and 292 from opposite axial sides.