| 摘要 |
<p>A planetary gear mechanism provided with: a housing (H); an input shaft (2) which has an eccentric section (22) centered on an eccentric shaft which is eccentric to an input/output axis, the input shaft (2) being supported relative to the housing (H) so as to be rotatable about the input/output axis; a rocking surface plate (3) which eccentrically rocks through the eccentric section (22) and is restricted to rotate relative to the housing (H); and an output shaft (7) which has mounted thereto an internally toothed gear (6) internally meshed with an externally toothed gear formed on the rocking surface plate (3), the output shaft (7) being provided to the housing (H) so as to be rotatable about the input/output axis. The circumferential position at which the externally toothed gear and the internally toothed gear (6) mesh with each other changes as the input shaft (2) rotates, and the rotation of the input shaft (2) is reduced in speed and extracted from the output shaft (7). The engagement of a first pin, which protrudes from the rocking surface plate (3), with an insertion hole (H1) formed in the housing (H) restricts the rotation of the rocking surface plate (3).</p> |
