Patent ID: 9512906
Filing Date: 2016-12-06
CPC Classification: F16H

Claim Text:
1. A transmission device, comprising: a first driving means; an input means rotatably supported and to be connected to the first driving means; an eccentric guiding plate having an axial center aligned with the input means, rotatably supported, and having an annular eccentric guiding portion on one side, the annular eccentric guiding portion having an axial center at an eccentric position different from the axial center of the input means; a second driving means rotating the eccentric guiding plate; an internal/external gear wheel formed opposed to the eccentric guiding plate, having a first cylindrical guiding portion to be guided by the eccentric guiding portion, and also having external cogs and internal cogs provided centering on a center position of the first cylindrical guiding portion; and an output means having a same axial center as the input means and also having internal cogs engaging with the external cogs of the internal/external gear wheel, the internal cogs of the internal/external gear wheel being connected to a main axis portion of the input means through a feature for joining gear wheels, the internal/external gear wheel revolving along the eccentric guiding portion while rotating in accordance with a difference in the number of rotations between the input means and the eccentric guiding plate, wherein the feature for joining gear wheels comprises: a disk portion and external cogs forming the input means and provided coaxially; a second cylindrical guiding portion provided on one side of the internal/external gear wheel with the axial center aligned with the first cylindrical guiding portion; an external gear wheel rotatably set in and attached to the input means and having external cogs in a same shape as the external cogs of the input means and engaging with the internal cogs of the internal/external gear wheel; and an internal gear wheel having internal cogs engaging with the external cogs of the input means and the external cogs of the external gear wheel, and also having an annular guiding portion to be guided by the second cylindrical guiding portion, the internal gear wheel arranged in between the disk portion and the internal/external gear wheel and revolving along with the revolving of the internal/external gear wheel.