Eccentrically oscillating rotation speed reduction gear, has lubrication passage formed in eccentric cam body shaft such that lubrication passage is extended along axial direction, and another passage opened between bearing and cam bodies

摘要

The gear (G1) has an eccentric cam body shaft i.e. input shaft (20), provided with eccentric cam bodies (14, 16). Eccentric cam body bearings (28, 30) are arranged between support structures (40, 42) and the shaft. A lubrication passage (22) is formed in the shaft such that the lubrication passage is extended along axial direction. Another lubrication passage (24) is connected with the former lubrication passage and formed such that the latter lubrication passage is extended along the radial direction. The latter lubrication passage is opened between the bearings and the cam bodies. The support structure is designed as inner rings of a main bearing.