| 摘要 |
A power transmission apparatus (10) including a base (13) with a driven shaft (11) rotably supported by the base (11) is disclosed. The apparatus (10) further includes an internal gear (17) surrounding the shaft (11) and fixed to the base (13), an arm (14) fixed to the shaft (11) and extending generally radially therefrom, a planetary gear (16) rotably attached to the arm (14) and meshingly engaged with the internal gear (17) so that rotation of said planetary gear (16) causes rotation of the shaft (11), and a connecting rod (19) rotably attached to an extension (20) fixed to the planetary gear (16) so that a means driving the connecting rod (19) causes rotation of the planetary gear (16), the connecting rod (19) being attached to the planetary gear (19) at a predetermined location from the planetary gear (16) by the length of the extension (20) and the connecting rod (19) angularly oscillating across a transverse axis of the shaft (11).
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