PLANETARY GEAR

摘要

PROBLEM TO BE SOLVED: To prevent early wear of part of an internal gear, a planet gear and a sun gear. SOLUTION: A slight clearance is formed between an inner circumferential surface of a housing 2 and an outer circumferential surface of the internal gear 4. When the planet gear 3 rotates, the internal gear 4 is automatically aligned through a mesh with the planet gear 3.